JPH10288165A - Vibrating type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve compression efficiency by detecting a top dead center position of a piston, feedbacking a difference of the position from an expected value to the amplitude value of the piston, detecting a common frequency of a compressor and operating the piston by the common frequency. SOLUTION: A point which is the closest to a valve mounted on a cylinder 101 when a piston 102 reciprocates is detected as a top dead center location from a position signal of the piston 102 that a displacement detecting part 105 detects by a top dead center location detecting part 106. The resonance frequency of a system constituted of the piston 102 and a resonance spring 104 is detected by a resonance frequency detecting part 109. When the top dead center location is deviated from a preliminarily fixed value, an VAC Vac value that a driving part 103 impresses on the piston 102 is determined by a control part 110 based on the top dead center location. Further, the driving part 103 determines the frequency value of VAC Vac that the driving part 103 impresses on the piston 102, based on the resonance frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a vibration type compressor such as a refrigerator.

[0002]

2. Description of the Related Art Vibration compressors are used in refrigerators and the like because of their simple structure, small size and light weight, high power factor, and low power consumption.

An example of a conventional vibration type compressor is disclosed in Japanese Utility Model Laid-Open No. 2-145678.

Hereinafter, a conventional vibration type compressor will be described with reference to FIG. In FIG. 11, 1 is a pressure command generator, 2 is an addition amplifier, 3 is a frequency signal generator, 4
Is a pulse signal generator, 5 is a power controller, 6 is an AC power supply,
7 is a linear motor, 8 is a compressor, 9 is a pressure layer, 1
0 represents a compressor, and 11 represents a pressure detector.

The AC power supply 6 supplies power to the power controller 5. The power controller 5 uses the power supplied from the AC power supply 6 and the signal supplied from the pulse signal generator 4 to control the compressor. This is for driving the linear motor 7 that constitutes 10.

The operation of the conventional vibration type compressor will be described. The pressure command generator 1 gives a pressure command to the summing amplifier 2. The summing amplifier 2 generates a pressure command given from the pressure command generator 1, a pressure value detected by the pressure detector 11, and a frequency generated by the frequency signal generator 3. The signal is added and amplified, and a signal is output to the pulse signal generator 4.

[0007] The pulse signal generator 4 supplies a pulse signal to the power controller 5 based on the signal output from the addition amplifier 2.

A power controller 5 drives a linear motor 7 constituting a vibrating compressor 11 by using a power supplied by an AC power supply 6 based on a signal generated by the pulse signal generator 4.

When the linear motor 7 is driven, the compressor 8 sucks, compresses, and discharges the refrigerant in the pressure tank 9.

The pressure detector 11 detects the pressure of the refrigerant discharged from the pressure tank 9 and outputs a signal to the addition amplifier 2.

By using such a conventional vibration type compressor, even when a difference occurs between the pressure indicated by the pressure command generator 1 and the pressure of the pressure tank 9 detected by the pressure detector 11, the addition amplifier is used. 2 controls the signal output given to the pulse signal generator 4 so as to operate the vibration compressor 10 as expected.

[0012]

However, in a vibrating compressor using the prior art, it is not possible to detect a change in the resonance frequency of the vibrating compressor due to a change in a load condition or the like. There has been such a problem that a deviation from the resonance frequency occurs and the compression efficiency is reduced.

[0013] Further, since the true refrigerant pressure has an error with the pressure detected by the pressure detector, and the detected pressure has a time delay depending on the mounting position of the pressure detector, etc., the addition amplifier causes the pulse signal generator to operate. However, there is a problem that the control of the signal output given to the device may be uncertain or unstable.

In view of the above, the present invention considers that the resonance frequency of the vibrating compressor changes due to a change in load conditions and the like, detects the top dead center position of the piston, and determines the deviation from the expected value. The object of the present invention is to not only prevent the decrease in efficiency by feeding back to the amplitude value of the compressor, but also improve the efficiency by detecting the resonance frequency of the compressor and operating the piston at the resonance frequency.

[0015]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a cylindrical cylinder provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and the piston A driving unit that applies an AC voltage as a piston driving force to drive the piston, a resonance spring connected to the piston, and detects a displacement of the piston that is connected in the axial direction of the piston and outputs a piston position signal. A displacement detection unit, a top dead center position detection unit that detects a top dead center position of the piston from the piston position signal detected by the displacement detection unit, and a piston position detection unit that detects the piston from the piston position signal detected by the displacement detection unit. An operating frequency detecting unit that detects an operating frequency; a voltage detecting unit that detects a voltage value of the piston driving force applied to the piston by the driving unit; A resonance frequency detection unit that detects a resonance frequency of a system including the piston and the resonance spring from the operating frequency detected by the number detection unit and the voltage value detected by the voltage detection unit, and the top dead center position detection unit The drive unit determines a voltage value of the piston driving force applied to the piston based on the top dead center position detected by the drive unit, and the drive unit determines a voltage value of the piston driving force based on the resonance frequency detected by the resonance frequency detection unit. A control unit for determining a frequency of the piston driving force to be applied to the piston.

A cylinder having a cylindrical body provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and applying an AC voltage to the piston as a piston driving force to drive the piston. A drive unit, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the piston position detected by the displacement detection unit A top dead center position detection unit that detects a top dead center position of the piston from a signal, an operation frequency detection unit that detects an operation frequency of the piston from the piston position signal detected by the displacement detection unit, and the driving unit A current detector for detecting a current value of the piston driving force applied to the piston, and the operating frequency and the current detected by the operating frequency detector. A resonance frequency detection unit that detects a resonance frequency of a system including the piston and the resonance spring from the current value detected by the output unit, and the top dead center position detected by the top dead center position detection unit. The drive unit determines the voltage value of the piston driving force applied to the piston, and determines the frequency of the piston driving force applied to the piston by the drive unit based on the resonance frequency detected by the resonance frequency detection unit. And a control unit for determining.

Further, a cylinder having a cylindrical body provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and applying an AC voltage to the piston as a piston driving force to drive the piston. A drive unit, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the piston position detected by the displacement detection unit A top dead center position detection unit that detects the top dead center position of the piston from a signal, the piston position signal detected by the displacement detection unit and the AC voltage applied to the piston by the driving unit and the piston and the piston A resonance frequency detection unit that detects a resonance frequency of a system composed of a resonance spring, a time measurement unit that measures a certain time and transmits a signal when the measurement is completed, The drive unit determines a voltage value of the piston driving force applied to the piston based on the top dead center position detected by the dead center position detection unit, and detects the resonance frequency based on a signal from the timing unit. A control unit that determines the frequency of the piston driving force applied to the piston by the driving unit based on the resonance frequency detected by the unit,
This is a vibration type compressor provided with.

Further, a cylinder having a cylindrical body provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and applying an AC voltage to the piston as a piston driving force to drive the piston. A drive unit, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the piston position detected by the displacement detection unit A top dead center position detection unit that detects the top dead center position of the piston from a signal, the piston position signal detected by the displacement detection unit and the AC voltage applied to the piston by the driving unit and the piston and the piston A resonance frequency detection unit that detects a resonance frequency of a system composed of a resonance spring, a time measurement unit that measures a certain time and transmits a signal when the measurement is completed, The drive unit determines a voltage value of the piston driving force applied to the piston based on the top dead center position detected by the dead center position detection unit, and the top dead center based on a signal from the timing unit. If the top dead center position detected by the position detection unit is determined to match or match a predetermined condition, the drive unit is connected to the piston based on the resonance frequency detected by the resonance frequency detection unit. A control unit for determining the frequency of the piston driving force to be applied,
This is a vibration type compressor provided with.

Also, a cylindrical cylinder provided with a suction valve and a discharge valve, a piston moving in the cylinder in the axial direction, and an AC voltage applied to the piston as a piston driving force to drive the piston. A drive unit, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the piston position detected by the displacement detection unit A top dead center position detection unit that detects the top dead center position of the piston from a signal, the piston position signal detected by the displacement detection unit and the AC voltage applied to the piston by the driving unit and the piston and the piston A resonance frequency detection unit for detecting a resonance frequency of a system including a resonance spring; and the drive unit based on the top dead center position detected by the top dead center position detection unit. The unit determines the voltage value of the piston driving force applied to the piston, and determines whether the top dead center position detected by the top dead center position detection unit matches a predetermined condition and matches it. And a control unit that determines a frequency of the piston driving force applied to the piston by the drive unit based on the resonance frequency detected by the resonance frequency detection unit.

[0020]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, there is provided a cylindrical cylinder provided with a suction valve and a discharge valve;
A piston that moves in the cylinder in the axial direction, a driving unit that applies an AC voltage to the piston as a piston driving force to drive the piston, a resonance spring connected to the piston, and an axial connection to the piston A displacement detection unit that detects a displacement of the piston and outputs it as a piston position signal; a top dead center position detection unit that detects a top dead center position of the piston from the piston position signal detected by the displacement detection unit; An operating frequency detecting unit that detects an operating frequency of the piston from the piston position signal detected by the displacement detecting unit, a voltage detecting unit that detects a voltage value of the piston driving force applied to the piston by the driving unit, The piston and the resonance spring are determined based on the operating frequency detected by the operating frequency detector and the voltage value detected by the voltage detector. A resonance frequency detection unit that detects a resonance frequency of a system including the system, and a voltage value of the piston driving force applied to the piston by the drive unit based on the top dead center position detected by the top dead center position detection unit. And a control unit for determining the frequency of the piston driving force applied to the piston by the drive unit based on the resonance frequency detected by the resonance frequency detection unit. A driving unit applies an AC voltage as a piston driving force to a piston that moves in an axial direction in a cylinder of a cylindrical body provided with a suction valve and a discharge valve, and a displacement detection unit detects the piston. The displacement is detected and output as a piston position signal, the top dead center position detection unit detects the top dead center position of the piston based on the piston position signal from the displacement detection unit, and the operation frequency detection unit detects the displacement. The operation in which the operating frequency of the piston is detected based on the piston position signal from the unit, the voltage detecting unit detects the voltage value of the AC voltage applied to the piston as the piston driving force, and the resonance frequency detecting unit detects the operating frequency. Based on the frequency and the voltage value detected by the voltage detection unit, the resonance frequency of the system including the piston and the resonance spring is detected, and the control unit controls the drive unit based on the top dead center position deviation detected by the top dead center position deviation detection unit. The control unit determines the voltage value of the piston driving force applied to the piston, and the control unit determines the frequency value of the piston driving force applied to the piston based on the resonance frequency detected by the resonance frequency detection unit. .

According to a second aspect of the present invention, there is provided a cylindrical cylinder provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and an AC voltage applied to the piston as a piston driving force. A drive unit for applying and driving the piston, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the displacement detection A top dead center position detecting unit for detecting a top dead center position of the piston from the piston position signal detected by the unit, and an operating frequency detection for detecting an operating frequency of the piston from the piston position signal detected by the displacement detecting unit Unit, a current detection unit that detects a current value of the piston driving force applied to the piston by the drive unit, and the current detection unit that the operation frequency detection unit detects. A resonance frequency detection unit for frequency as the current detection unit detects the resonant frequency of the system consisting of the piston and the resonant spring from said current value to be detected,
The drive unit determines a voltage value of the piston driving force applied to the piston based on the top dead center position detected by the top dead center position detection unit, and the resonance frequency detected by the resonance frequency detection unit. And a control unit that determines the frequency of the piston driving force applied to the piston by the driving unit based on the vibration type compressor, wherein the driving unit includes a suction valve and a discharge valve. An AC voltage is applied as a piston driving force to a piston that moves in an axial direction in a cylinder of a tubular body provided with a valve, and a displacement detection unit detects the displacement of the piston and outputs it as a piston position signal, and a top dead center. The position detector detects the top dead center position of the piston based on the piston position signal from the displacement detector, and the operating frequency detector detects the operating frequency of the piston based on the piston position signal from the displacement detector. The current detection unit detects the current value of the AC voltage applied to the piston as the piston driving force, and the resonance frequency detection unit detects the operation frequency detected by the operation frequency detection unit and the current value detected by the current detection unit. The controller detects the resonance frequency of the system consisting of the piston and the resonance spring, and the control unit calculates the voltage value of the piston driving force applied to the piston by the drive unit based on the top dead center position deviation detected by the top dead center position deviation detection unit. The control unit has the function of determining the frequency value of the piston driving force applied to the piston based on the resonance frequency detected by the resonance frequency detection unit.

According to a third aspect of the present invention, there is provided a cylindrical cylinder provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and an AC voltage applied to the piston as a piston driving force. A drive unit for applying and driving the piston, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the displacement detection A top dead center position detecting section for detecting a top dead center position of the piston from the piston position signal detected by the section, the piston position signal detected by the displacement detecting section, and the alternating current applied to the piston by the driving section. A resonance frequency detection unit that detects a resonance frequency of a system including the piston and the resonance spring from a voltage and transmits a signal when measurement is completed for a predetermined time and measurement is completed. And a voltage value of the piston driving force applied to the piston by the driving unit based on the top dead center position detected by the top dead center position detection unit, and a signal from the timing unit. A control unit that determines the frequency of the piston driving force applied to the piston by the drive unit based on the resonance frequency detected by the resonance frequency detection unit based on the vibration type compression. The drive unit applies AC voltage as a piston driving force to a piston that moves in the axial direction in a cylinder of a cylindrical body provided with a suction valve and a discharge valve, and the displacement detection unit detects the displacement of the piston. The top dead center position detection unit detects the top dead center position of the piston based on the piston position signal from the displacement detection unit, and the resonance frequency detection unit detects the top dead center position from the displacement detection unit. The ton position signal and the AC voltage applied to the piston by the drive unit detect the resonance frequency of the system consisting of the piston and the resonance spring, the timer measures a certain period of time and sends a signal when the measurement is completed. The drive unit determines the voltage value of the piston driving force applied to the piston based on the top dead center position deviation detected by the dead center position deviation detection unit, and the control unit controls the resonance frequency detection unit based on a signal from the timing unit. Has the effect of determining the frequency value of the piston driving force applied to the piston based on the detected resonance frequency.

According to a fourth aspect of the present invention, there is provided a cylindrical cylinder provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and an AC voltage applied to the piston as a piston driving force. A drive unit for applying and driving the piston, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the displacement detection A top dead center position detecting section for detecting a top dead center position of the piston from the piston position signal detected by the section, the piston position signal detected by the displacement detecting section, and the alternating current applied to the piston by the driving section. A resonance frequency detection unit that detects a resonance frequency of a system including the piston and the resonance spring from a voltage and transmits a signal when measurement is completed for a predetermined time and measurement is completed. And a voltage value of the piston driving force applied to the piston by the driving unit based on the top dead center position detected by the top dead center position detection unit, and a signal from the timing unit. Based on the resonance frequency detected by the resonance frequency detection unit if the top dead center position detected by the top dead center position detection unit is determined to match or match a predetermined condition based on the resonance frequency detection unit A control unit for determining the frequency of the piston driving force applied to the piston by the drive unit, wherein the drive unit is provided with a suction valve and a discharge valve. An AC voltage is applied as a piston driving force to a piston that moves in the axial direction in the cylinder of the cylindrical body, and a displacement detection unit detects the displacement of the piston and outputs it as a piston position signal, and a top dead center position detection unit Is displacement detection The resonance frequency detector detects the top dead center position of the piston based on the piston position signal from the unit, and the resonance frequency detector detects the piston position signal from the displacement detector and the AC voltage applied to the piston by the drive unit. The resonance frequency is detected, the timer measures a certain period of time, and when the measurement is completed, a signal is sent.The control unit applies the piston to the piston based on the top dead center position deviation detected by the top dead center position deviation detection unit. The control unit determines the voltage value of the piston driving force to perform, and the control unit determines whether the top dead center position detected by the top dead center position detection unit based on the signal from the timing unit matches the predetermined condition and matches In such a case, the frequency of the piston driving force applied to the piston is determined based on the resonance frequency detected by the resonance frequency detector.

According to a fifth aspect of the present invention, there is provided a cylinder having a cylindrical body provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and applying an AC voltage to the piston as a piston driving force. A drive unit for applying and driving the piston, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the displacement detection A top dead center position detecting section for detecting a top dead center position of the piston from the piston position signal detected by the section, the piston position signal detected by the displacement detecting section, and the alternating current applied to the piston by the driving section. A resonance frequency detection unit that detects a resonance frequency of a system including the piston and the resonance spring from a voltage, and the top dead center position detected by the top dead center position detection unit Determines the voltage value of the piston driving force applied to the piston by the drive unit, and determines whether the top dead center position detected by the top dead center position detection unit matches a predetermined condition. And a control unit that determines the frequency of the piston driving force applied to the piston by the drive unit based on the resonance frequency detected by the resonance frequency detection unit if the resonance frequency is detected. A drive unit applies an AC voltage as a piston driving force to a piston that moves in an axial direction in a cylindrical cylinder provided with a suction valve and a discharge valve, and a displacement detection unit. Detects the displacement of the piston and outputs it as a piston position signal, the top dead center position detection unit detects the top dead center position of the piston based on the piston position signal from the displacement detection unit, and the resonance frequency detection unit The top dead center detected by the top dead center position deviation detection unit is detected by the control unit by detecting the resonance frequency of the system consisting of the piston and the resonance spring from the piston position signal from the position detection unit and the AC voltage applied to the piston by the drive unit. The drive unit determines the voltage value of the piston driving force applied to the piston based on the position deviation, and the control unit determines whether the top dead center position detected by the top dead center position detection unit matches a predetermined condition. If the values match, the frequency of the piston driving force applied to the piston is determined based on the resonance frequency detected by the resonance frequency detector.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 is a configuration diagram of a vibration type compressor according to a first embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the vibration type compressor according to the embodiment.

In FIG. 1, 100 (a) is a suction valve, 100
(B) is a discharge valve, 101 is a cylinder, 102 is a piston, 103 is a drive unit, 104 is a resonance spring, 105
Is a displacement detector, 106 is a top dead center position detector, 107
Is an operation frequency detection unit, 108 is a voltage detection unit, and 109 is a voltage detection unit.
Is a resonance frequency detection unit, and 110 is a control unit.

In the drawing, a piston 102 moves vertically inside a cylinder 101 by a driving force from a driving unit 103.

The displacement detector 104 is composed of a differential transformer or the like, and is connected in the longitudinal direction of the piston 102, and detects the displacement of the piston 102 as a piston position signal such as an output voltage value of the differential transformer.

The top dead center position detecting section 106 includes the displacement detecting section 10
From the detected position signal of the piston 102, the point closest to the valve attached to the cylinder 101 when the piston 102 reciprocates is detected as the top dead center position. This operation is performed, for example, when the piston 102
The piston 10 is moved from the closest position to the valve attached to the first position until it moves further away and then to the closest position, or from the farthest position to the next position and then to the farthest position.
It is assumed that the top dead center position is detected for each cycle of the two reciprocating motions. Here, the top dead center position detected by the top dead center position detection unit 106 may be expressed as, for example, 600 μm in distance from a valve attached to the cylinder 101,
The distance from the amplitude center of the piston 102 that performs the reciprocating motion may be expressed as 7.50 mm.

The operating frequency detector 107 is provided for the displacement detector 10.
The operation frequency at which the piston 102 reciprocates is detected from the detected position signal of the piston 102 at 4.
This operation is performed, for example, by measuring the time from when the piston 102 comes closest to the valve attached to the cylinder 101 until it once moves away and then comes closest, or when it comes from the farthest once it comes close and then comes farthest. Detects operating frequency.

The voltage detecting section 108 detects a voltage value of an AC voltage applied by the driving section 103 to the piston 102 as a piston driving force.

The resonance frequency detecting section 109 includes the piston 102
And a resonance frequency of the system including the resonance spring 104 is detected. This is because if the top dead center position of the piston 102 detected by the top dead center position detection unit 106 is constant, the voltage value of the AC voltage applied from the driving unit 103 when the piston 102 reciprocates at the resonance frequency is Take advantage of minimization,
The drive unit 103 changes the frequency value of the AC voltage applied to the piston 102 within a predetermined range, detects the change in the voltage value at that time by the voltage detection unit 108, and determines the frequency value when the voltage value becomes the minimum. Piston 102 and resonance spring 104
Is determined as the resonance frequency of the system consisting of

The control unit 110 includes a top dead center position detection unit 106
When the top dead center position of the piston 102 is deviated from the predetermined value due to a load change or the like so that the top dead center position detected by the driving unit 103 becomes a predetermined constant value, the driving unit 103 applies the piston 102 to the piston 102. The voltage value of the AC voltage is determined based on the top dead center position detected by the top dead center position detection unit 106. Further, when the resonance frequency detection unit 109 detects the resonance frequency, the control unit 110 changes the frequency value of the AC voltage applied to the piston 102 by the driving unit 103 based on a command from the resonance frequency detection unit 109, and detects the resonance frequency. Part 10
9 is the resonance frequency of the piston 102 and the resonance spring 104
After detecting the resonance frequency of the system consisting of, the driving unit 103 determines the frequency value of the AC voltage applied to the piston 102 based on the detected resonance frequency.

FIG. 2 shows a specific example of the operation of the vibrating compressor according to the first embodiment of the present invention configured as described above.
This will be described with reference to the flowchart of FIG.

Step 1001: The driving unit 103 drives the piston 102 with a predetermined piston driving force (100 in FIG. 2).
1 copy).

Step 1002: The displacement detecting section 105 detects the displacement of the piston 102 and outputs it as a piston position signal (1002 in FIG. 2).

Step 1003: The top dead center position detecting section 106 detects the top dead center position of the piston 102 based on the piston position signal output from the displacement detecting section 105 in step 1002 (portion 1003 in FIG. 2).

Step 1004: The control unit 110 executes the procedure 100
In step 3, the drive unit 103 determines the value of the AC voltage applied to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106 (portion 1004 in FIG. 2).

Step 1005: The operating frequency detector 107 detects the operating frequency of the piston 102 based on the piston position signal output by the displacement detector 105 in step 1002 (1005 in FIG. 2).

Step 1006: The voltage detecting unit 108 detects the voltage value of the AC voltage applied by the driving unit 103 to the piston 102 (portion 1006 in FIG. 2).

Step 1007: It is determined whether or not the voltage value detected by the resonance frequency detecting section 109 in step 1006 is the minimum (portion 1007 in FIG. 2).

Step 1008: If the voltage value is not minimum in step 1007, the resonance frequency detecting section 109
03 changes the frequency of the AC voltage applied to the piston 102 (portion 1008 in FIG. 2).

Step 1009: If the voltage value is the minimum in step 1007, the resonance frequency detecting section 109 detects the frequency value at this time as the resonance frequency (1009 in FIG. 2).
Department).

Step 1010: The control unit 110 executes the procedure 100
The drive unit 103 determines the frequency value of the AC voltage applied to the piston 102 based on the resonance frequency detected in Step 9 (part 1010 in FIG. 2).

As described above, the vibration type compressor according to the first embodiment of the present invention includes the driving unit 103 for applying an AC voltage to the piston 102 as the piston driving force, the piston 1
02, which is connected in the axial direction of No. 02 and detects a displacement of the piston 102 and outputs it as a piston position signal.
And a top dead center position detection unit 1 that detects the top dead center position of the piston 102 from the piston position signal from the displacement detection unit 105
06, an operating frequency detecting unit 107 for detecting an operating frequency of the piston 102 from a piston position signal from the displacement detecting unit 105, and a voltage detecting unit 108 for detecting a voltage value of a piston driving force applied to the piston 102 by the driving unit 103.
The resonance frequency detection unit 109 that detects the resonance frequency of the system composed of the piston 102 and the resonance spring 104, and the drive unit 103 applies to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106. The drive unit 103 determines the voltage value of the piston driving force, and the driving unit 103
And a control unit 110 for determining the frequency of the piston driving force applied to the piston 2, so that the top dead center position when the piston 102 reciprocates is always kept at a desired position while maintaining the temperature condition and pressure condition. When the external condition changes, the piston 102 can reciprocate at the resonance frequency,
It is a vibration type compressor capable of improving compression efficiency.

(Embodiment 2) FIG. 3 is a configuration diagram of a vibration type compressor according to a second embodiment of the present invention. FIG.
4 is a flowchart showing the operation of the vibration type compressor according to the embodiment.

In FIG. 3, the same components as those of the vibration type compressor according to the first embodiment of the present invention are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 3, reference numeral 208 denotes a current detection unit, 209 denotes a resonance frequency detection unit, and 110 denotes a control unit.

In the figure, a current detecting unit 208 detects a current value of an AC voltage applied by the driving unit 103 to the piston 102 as a piston driving force.

The resonance frequency detecting section 109 includes the piston 102
And a resonance frequency of the system including the resonance spring 104 is detected. This is because if the top dead center position of the piston 102 detected by the top dead center position detection unit 106 is constant, the current value of the AC voltage applied from the driving unit 103 when the piston 102 reciprocates at the resonance frequency is Take advantage of minimization,
The drive unit 103 changes the frequency value of the AC voltage applied to the piston 102 within the predetermined range, and the change in the current value at that time is detected by the current detection unit 108, and the frequency value when the current value becomes the minimum is determined. Piston 102 and resonance spring 104
Is determined as the resonance frequency of the system consisting of

FIG. 4 shows a specific example of the operation of the vibrating compressor according to the second embodiment of the present invention configured as described above.
This will be described with reference to the flowchart of FIG.

Procedure 2001: The driving unit 103 drives the piston 102 with a predetermined piston driving force (200 in FIG. 4).
1 copy).

Step 2002: The displacement detecting section 105 detects the displacement of the piston 102 and outputs it as a piston position signal (2002 in FIG. 4).

Step 2003: The top dead center position detecting section 106 detects the top dead center position of the piston 102 based on the piston position signal output from the displacement detecting section 105 in step 2002 (2003 section in FIG. 4).

Step 2004: The control unit 110 executes the procedure 200
In step 3, the drive unit 103 determines the voltage value of the AC voltage applied to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106 (2004 in FIG. 4).

Step 2005: The operating frequency detecting section 107 detects the operating frequency of the piston 102 based on the piston position signal output by the displacement detecting section 105 in step 2002 (2005 section in FIG. 4).

Step 2006: The current detection unit 108 detects the current value of the AC voltage applied to the piston 102 by the drive unit 103 (2006 in FIG. 4).

Step 2007: It is determined whether or not the current value detected by the resonance frequency detecting section 109 in step 2006 is minimum (2007 in FIG. 4).

Step 2008: If the current value is not minimum in step 2007, the resonance frequency detecting section 109
03 changes the frequency of the AC voltage applied to the piston 102 (2008 part in FIG. 4).

Step 2009: If the current value is the minimum in step 2007, the resonance frequency detecting section 109 detects the frequency value at this time as the resonance frequency (2009 in FIG. 4).
Department).

Step 2010: The control unit 110 executes step 200
The drive unit 103 determines the frequency value of the AC voltage applied to the piston 102 based on the resonance frequency detected in step 9 (2010 in FIG. 4).

As described above, the vibration type compressor according to the second embodiment of the present invention comprises a driving section 103 for applying an AC voltage to a piston 102 as a piston driving force, and a piston 1
02, which is connected in the axial direction of No. 02 and detects a displacement of the piston 102 and outputs it as a piston position signal.
And a top dead center position detection unit 1 that detects the top dead center position of the piston 102 from the piston position signal from the displacement detection unit 105
06, an operating frequency detecting unit 107 for detecting an operating frequency of the piston 102 from a piston position signal from the displacement detecting unit 105, and a current detecting unit 108 for detecting a current value of a piston driving force applied to the piston 102 by the driving unit 103.
The resonance frequency detection unit 109 that detects the resonance frequency of the system composed of the piston 102 and the resonance spring 104, and the drive unit 103 applies to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106. The drive unit 103 determines the voltage value of the piston driving force, and the driving unit 103
And a control unit 110 for determining the frequency of the piston driving force applied to the piston 2, so that the top dead center position when the piston 102 reciprocates is always kept at a desired position while maintaining the temperature condition and pressure condition. When the external condition changes, the piston 102 can reciprocate at the resonance frequency,
It is a vibration type compressor capable of improving compression efficiency.

(Embodiment 3) FIG. 5 is a configuration diagram of a vibrating compressor according to a third embodiment of the present invention. FIG.
4 is a flowchart showing the operation of the vibration type compressor according to the embodiment.

In FIG. 5, the same components as those of the vibrating compressor according to the first embodiment of the present invention and the vibrating compressor according to the second embodiment of the present invention are denoted by the same reference numerals and detailed description. Description is omitted.

In FIG. 5, reference numeral 309 denotes a resonance frequency detecting unit.
Reference numeral 10 denotes a control unit, and 311 denotes a clock unit.

In the figure, a resonance frequency detector 309 detects the resonance frequency of a system composed of the piston 102 and the resonance spring 104. If the top dead center position of the piston 102 detected by the top dead center position detection unit 106 is constant, the piston 10
When the drive unit 103 performs a reciprocating motion at the resonance frequency,
Using the fact that the voltage value and the current value of the AC voltage applied from
Changes the frequency value of the AC voltage applied to the piston 102 and detects a change in the voltage value or current value at that time,
The frequency value when the voltage value or the current value becomes minimum is determined as the resonance frequency of the system including the piston 102 and the resonance spring 104.

The control unit 310 controls the top dead center position detection unit 106
When the top dead center position of the piston 102 is deviated from the predetermined value due to a load change or the like so that the top dead center position detected by the driving unit 103 becomes a predetermined constant value, the driving unit 103 applies the piston 102 to the piston 102. The voltage value of the AC voltage is determined based on the top dead center position detected by the top dead center position detection unit 106. Further, control unit 310 transmits a command to start resonance frequency detection to resonance frequency detection unit 309 based on a signal from time measurement unit 311. When resonance frequency detection unit 309 starts resonance frequency detection, resonance frequency detection unit After the drive unit 103 changes the frequency value of the AC voltage applied to the piston 102 based on the command of 309, and the resonance frequency detection unit 309 detects the resonance frequency of the piston 102 and the resonance frequency of the system including the resonance spring 104, The frequency value of the AC voltage applied to the piston 102 by the driving unit 103 is determined based on the detected resonance frequency.

The timer 311 measures a predetermined time, and sends a signal to the controller 310 when the measurement is completed.

FIG. 6 shows a specific example of the operation of the vibrating compressor according to the third embodiment of the present invention configured as described above.
This will be described with reference to the flowchart of FIG.

Step 3001: The driving unit 103 drives the piston 102 with a predetermined piston driving force (300 in FIG. 6).
1 copy).

Step 3002: The displacement detector 105 detects the displacement of the piston 102 and outputs it as a piston position signal (part 3002 in FIG. 6).

Step 3003: The top dead center position detection unit 106 detects the top dead center position of the piston 102 based on the piston position signal output from the displacement detection unit 105 in step 3002 (part 3003 in FIG. 6).

Step 3004: The control unit 310 executes the procedure 300
In step 3, the driving unit 103 determines the value of the AC voltage applied to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106 (3004 in FIG. 6).

Step 3005: The timer 311 measures a predetermined period of time (3005 in FIG. 6), and if the period has not elapsed, repeats steps 3002 to 3004.

Step 3006: The timer 31 in step 3005
If 1 has completed the measurement for a certain period of time, the timer 311 sends a signal to the controller 310, and the controller 310
The resonance frequency detection unit 309 starts the resonance frequency detection based on the signal from 1 (part 3005 in FIG. 6).

Step 3007: The resonance frequency detector 309 detects the resonance frequency (3006 in FIG. 6).

Step 3008: The control unit 310 executes the procedure 300
The drive unit 103 determines the frequency value of the AC voltage applied to the piston 102 based on the resonance frequency detected in Step 7 (part 3007 in FIG. 6).

As described above, the vibrating compressor according to the third embodiment of the present invention includes a driving unit 103 for applying an AC voltage to a piston 102 as a piston driving force, a piston 1
02, which is connected in the axial direction of No. 02 and detects a displacement of the piston 102 and outputs it as a piston position signal.
And a top dead center position detection unit 1 that detects the top dead center position of the piston 102 from the piston position signal from the displacement detection unit 105
06, a resonance frequency detection unit 309 for detecting the resonance frequency of the system including the piston 102 and the resonance spring 104 from the piston position signal from the displacement detection unit 105 and the AC voltage applied to the piston 102 by the drive unit 103, Measurement unit 311 that measures the time and sends a signal when the measurement is completed.
The drive unit 103 determines the voltage value of the piston driving force applied to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106, and determines the resonance frequency based on the signal from the time measurement unit 311. And a control unit that determines the frequency of the piston driving force applied to the piston 102 by the driving unit 103 based on the resonance frequency detected by the detection unit 309. Not only can the point position always be kept at a desired position, but also the reciprocating motion of the piston 102 can be performed at the resonance frequency even when external conditions such as temperature conditions and pressure conditions change, so that compression efficiency can be improved. Type compressor.

(Embodiment 4) FIG. 7 is a configuration diagram of a vibrating compressor according to a fourth embodiment of the present invention. FIG.
4 is a flowchart showing the operation of the vibration type compressor according to the embodiment.

FIG. 7 shows the same structure as the vibration type compressor according to the first embodiment of the present invention, the second embodiment of the present invention, and the vibration type compressor according to the third embodiment of the present invention. Are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 7, reference numeral 410 denotes a control unit which changes the top dead center position of the piston 102 by a load change or the like so that the top dead center position detected by the top dead center position detection unit 106 becomes a predetermined constant value. The drive unit 103 determines the voltage value of the AC voltage applied to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106 when it deviates from a predetermined value. Further, control unit 410 determines whether or not the top dead center position of piston 102 detected by top dead center position detection unit 106 satisfies a predetermined condition based on a signal from clock unit 311. The condition at this time is, for example, using a deviation from a predetermined top dead center position reference value, “the difference between the top dead center position reference value and the top dead center position of the piston 102 detected by the top dead center position detection unit 106. The deviation is ± 1.00 mm or more ”, or the top dead center position of the piston 102 detected by the previous top dead center position detection unit 106 is stored and the deviation from the previous top dead center position is ± 500 μm or more. The condition may be set by a relative amount as shown in the following formula, or the condition may be set by an absolute amount such as "the top dead center position of the piston 102 detected by the top dead center position detection unit 106 is 1.5 mm or more". You may do it.

After the condition is determined, if the condition is met, control unit 410 transmits a command to start resonance frequency detection to resonance frequency detection unit 309, and when resonance frequency detection unit 309 starts resonance frequency detection, The drive unit 103 changes the frequency value of the AC voltage applied to the piston 102 based on a command from the resonance frequency detection unit 309, and
After detecting the resonance frequency of the piston 102 and the resonance frequency of the system including the resonance spring 104, the drive unit 103 determines the frequency value of the AC voltage applied to the piston 102 based on the detected resonance frequency.

FIG. 8 shows a specific example of the operation of the vibrating compressor according to the fourth embodiment of the present invention configured as described above.
This will be described with reference to the flowchart of FIG.

Step 4001: The driving unit 103 drives the piston 102 with a predetermined piston driving force (400 in FIG. 8).
1 copy).

Step 4002: The displacement detector 105 detects the displacement of the piston 102 and outputs it as a piston position signal (4002 in FIG. 8).

Step 4003: The top dead center position detection unit 106 detects the top dead center position of the piston 102 based on the piston position signal output by the displacement detection unit 105 in step 4002 (part 4003 in FIG. 8).

Step 4004: The control unit 410 executes the procedure 400
In step 3, the drive unit 103 determines the value of the AC voltage applied to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106 (4004 in FIG. 8).

Step 4005: The timer 311 measures a predetermined period of time (part 4005 in FIG. 8), and if the period has not elapsed, repeats steps 4002 to 4004.

Step 4006: The timer section 31 in step 4005
If 1 has completed the measurement for a certain period of time, the timing unit 311 sends a signal to the control unit 410, and the control unit 410
It is determined based on the signal from No. 1 whether or not a predetermined condition is satisfied (part 4006 in FIG. 8).

Step 4007: If the conditions predetermined in step 4006 are not met, steps 4002 to 4
005 is repeatedly executed, and if the predetermined condition is satisfied, the resonance frequency detection unit 309 is started to detect the resonance frequency (4006 in FIG. 8).

Step 4008: The resonance frequency detecting section 309 detects the resonance frequency (4007 in FIG. 8).

Step 4009: The control unit 410 executes the procedure 400
The drive unit 103 determines the frequency value of the AC voltage applied to the piston 102 based on the resonance frequency detected in Step 8 (4008 in FIG. 8).

As described above, the vibration type compressor according to the fourth embodiment of the present invention comprises a driving section 103 for applying an AC voltage to a piston 102 as a piston driving force;
02, which is connected in the axial direction of No. 02 and detects a displacement of the piston 102 and outputs it as a piston position signal.
And a top dead center position detection unit 1 that detects the top dead center position of the piston 102 from the piston position signal from the displacement detection unit 105
06, a resonance frequency detection unit 309 for detecting the resonance frequency of the system including the piston 102 and the resonance spring 104 from the piston position signal from the displacement detection unit 105 and the AC voltage applied to the piston 102 by the drive unit 103, Measurement unit 311 that measures the time and sends a signal when the measurement is completed.
The drive unit 103 determines the voltage value of the piston driving force applied to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106, and the top dead center based on the signal from the timing unit 311. It is determined whether or not the top dead center position detected by the point position detection unit 106 matches a predetermined condition, and when the top dead center position matches the predetermined condition, the driving unit 103 controls the piston 102 based on the resonance frequency detected by the resonance frequency detection unit 309. And a control unit for determining the frequency of the applied piston driving force, so that the top dead center position when the piston 102 performs the reciprocating motion is always maintained at a desired position, as well as the temperature condition and the pressure condition. This is a vibration-type compressor that can reciprocate the piston 102 at the resonance frequency even when the external condition changes, such as when the external condition changes.

(Embodiment 5) FIG. 9 is a configuration diagram of a vibration type compressor according to a fifth embodiment of the present invention. FIG.
0 is a flowchart showing the operation of the vibration type compressor in the embodiment.

FIG. 9 shows a vibration type compressor according to the first embodiment of the present invention, a second embodiment of the present invention, a third embodiment of the present invention, and a fourth embodiment of the present invention. The same components as those of the vibration type compressor according to the embodiment are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 9, reference numeral 510 denotes a control unit which adjusts the top dead center position of the piston 102 by load fluctuation or the like so that the top dead center position detected by the top dead center position detection unit 106 becomes a predetermined constant value. The drive unit 103 determines the voltage value of the AC voltage applied to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106 when it deviates from a predetermined value. Further, control unit 510 determines whether or not the top dead center position of piston 102 detected by top dead center position detection unit 106 satisfies a predetermined condition. The condition at this time is, for example, using a deviation from a predetermined top dead center position reference value, “the difference between the top dead center position reference value and the top dead center position of the piston 102 detected by the top dead center position detection unit 106. The deviation is ± 1.00 mm or more ”, or the top dead center position of the piston 102 detected by the previous top dead center position detection unit 106 is stored and the deviation from the previous top dead center position is ± 500 μm or more. The condition may be set by a relative amount as shown in FIG.
The condition may be set in an absolute amount such as "the top dead center position of 02 is 1.5 mm or more".

After the condition determination, the control unit 510 sends a resonance frequency detection start command to the resonance frequency detection unit 309 if the condition is satisfied. When the resonance frequency detection unit 309 starts the resonance frequency detection, The drive unit 103 changes the frequency value of the AC voltage applied to the piston 102 based on a command from the resonance frequency detection unit 309, and
After detecting the resonance frequency of the piston 102 and the resonance frequency of the system including the resonance spring 104, the drive unit 103 determines the frequency value of the AC voltage applied to the piston 102 based on the detected resonance frequency.

FIG. 1 shows a specific example of the operation of the vibrating compressor according to the fifth embodiment of the present invention configured as described above.
0 will be described.

Step 5001: The driving section 103 drives the piston 102 with a predetermined piston driving force (50 in FIG. 10).
01 parts).

Procedure 5002: The displacement detecting section 105 detects the displacement of the piston 102 and outputs it as a piston position signal (part 5002 in FIG. 10).

Step 5003: The top dead center position detection unit 106 detects the top dead center position of the piston 102 based on the piston position signal output by the displacement detection unit 105 in step 4002 (part 5003 in FIG. 10).

Step 5004: The control unit 510 executes the procedure 500
In step 3, the drive unit 103 determines the value of the AC voltage to be applied to the piston 102 based on the top dead center position detected by the top dead center position detection unit 106 (5004 in FIG. 10).

Step 5005: The control unit 510 determines whether or not a predetermined condition is met (5006 in FIG. 10).
If the conditions are not satisfied, the procedure 5002 to the procedure 500
4 is repeatedly executed, and if the predetermined condition is met, the resonance frequency detection unit 309 starts the resonance frequency detection.

Step 5006: The resonance frequency detection section 309 detects the resonance frequency (5006 in FIG. 10).

Procedure 5007: The control unit 510 executes the procedure 400
The drive unit 103 determines the frequency value of the AC voltage applied to the piston 102 based on the resonance frequency detected in 6 (5007 in FIG. 10).

As described above, the vibration type compressor according to the fifth embodiment of the present invention comprises a driving unit 103 for applying an AC voltage to a piston 102 as a piston driving force, a piston 1
02, which is connected in the axial direction of No. 02 and detects a displacement of the piston 102 and outputs it as a piston position signal.
And a top dead center position detection unit 1 that detects the top dead center position of the piston 102 from the piston position signal from the displacement detection unit 105
06, a piston position signal from the displacement detection unit 105 and an AC voltage applied to the piston 102 by the drive unit 103, and a resonance frequency detection unit 309 for detecting the resonance frequency of the system including the piston 102 and the resonance spring 104. The drive unit 103 determines the voltage value of the piston driving force applied to the piston 102 based on the top dead center position detected by the point position detection unit 106, and the top dead center position detected by the top dead center position detection unit 106 is A control unit that determines whether the driving unit 103 applies a frequency of the piston driving force applied to the piston 102 based on the resonance frequency detected by the resonance frequency detection unit 309 when it determines whether or not the predetermined condition is satisfied; , So that the top dead center position when the piston 102 performs the reciprocating motion is always maintained at a desired position, as well as the temperature condition and the pressure condition. How to external conditions during the change can be performed reciprocating motion of the piston 102 at the resonant frequency, a vibrating compressor it is possible to improve the compression efficiency.

[0107]

As described above, according to the present invention, a drive unit for applying an AC voltage to a piston as a piston driving force, and a displacement which is connected in the axial direction of the piston to detect the displacement of the piston and output it as a piston position signal. A detecting unit, a top dead center position detecting unit that detects a top dead center position of the piston from a piston position signal from the displacement detecting unit, and an operating frequency detecting unit that detects an operating frequency of the piston from a piston position signal from the displacement detecting unit A voltage detector for detecting a voltage value of a piston driving force applied to the piston by the drive unit, a resonance frequency detector for detecting a resonance frequency of a system including the piston and the resonance spring, and a top dead center position detector for detection The driving unit determines the voltage value of the piston driving force applied to the piston based on the position of the upper fulcrum, and drives the piston based on the prepulse frequency detected by the resonance frequency detecting unit. Since part is a control unit for determining a frequency of a piston driving force to be applied to the piston,
The piston can reciprocate at the resonance frequency even when external conditions such as temperature conditions and pressure conditions change while always maintaining the top dead center position at the desired position when the piston performs reciprocating motion, improving compression efficiency. It is a vibrating compressor that is capable of.

A drive unit for applying an AC voltage to the piston as a piston driving force, a displacement detection unit connected in the axial direction of the piston to detect the displacement of the piston and output as a piston position signal, and a piston from the displacement detection unit A top dead center position detecting unit that detects the top dead center position of the piston from the position signal, an operating frequency detecting unit that detects the operating frequency of the piston from the piston position signal from the displacement detecting unit, and a piston that the driving unit applies to the piston A current detecting unit for detecting a current value of the driving force; a resonance frequency detecting unit for detecting a resonance frequency of a system including a piston and a resonance spring; and a driving unit based on a top dead center position detected by the top dead center position detecting unit. Determines the voltage value of the piston driving force to be applied to the piston, and the driving unit applies the voltage to the piston based on the pre-oscillation frequency detected by the resonance frequency detecting unit. And a control unit that determines the frequency of the stone driving force, so that the top dead center position when the piston performs reciprocating motion is always kept at the desired position, even when external conditions such as temperature conditions and pressure conditions change. This is a vibration type compressor that can reciprocate a piston at a resonance frequency and improve compression efficiency.

A drive unit for applying an AC voltage to the piston as a piston driving force, a displacement detection unit connected in the axial direction of the piston to detect the displacement of the piston and output as a piston position signal, and a piston from the displacement detection unit A resonance frequency of a system consisting of a piston and a resonance spring based on a top dead center position detection unit that detects a top dead center position of a piston from a position signal, and a piston position signal from a displacement detection unit and an AC voltage applied to the piston by a driving unit. , A timer that measures a certain period of time and sends a signal when the measurement is completed, and a piston that the drive unit applies to the piston based on the top dead center position detected by the top dead center position detection unit The piston that the drive unit applies to the piston based on the resonance frequency detected by the resonance frequency detection unit based on the signal from the clock unit and determines the voltage value of the driving force And a control unit for determining the frequency of the driving force, so that not only the top dead center position is always kept at a desired position when the piston performs reciprocating motion, but also external conditions such as temperature conditions and pressure conditions. This is a vibration type compressor that can perform reciprocating motion of a piston at a resonance frequency even at the time of change and can improve compression efficiency.

A drive unit for applying an AC voltage to the piston as a piston driving force, a displacement detection unit connected in the axial direction of the piston to detect the displacement of the piston and output as a piston position signal, and a piston from the displacement detection unit A resonance frequency of a system consisting of a piston and a resonance spring based on a top dead center position detection unit that detects a top dead center position of a piston from a position signal, and a piston position signal from a displacement detection unit and an AC voltage applied to the piston by a driving unit. , A timer that measures a certain period of time and sends a signal when the measurement is completed, and a piston that the drive unit applies to the piston based on the top dead center position detected by the top dead center position detection unit The voltage value of the driving force is determined, and based on the signal from the timing unit, it is determined whether the top dead center position detected by the top dead center position detection unit matches a predetermined condition. The control unit determines the frequency of the piston driving force applied to the piston by the drive unit based on the resonance frequency detected by the resonance frequency detection unit. Not only is the top dead center always maintained at the desired position, but also the piston can reciprocate at the resonance frequency when external conditions such as temperature conditions and pressure conditions change, thereby improving compression efficiency. It is a vibration type compressor.

A driving unit for applying an AC voltage to the piston as a piston driving force, a displacement detecting unit connected in the axial direction of the piston to detect the displacement of the piston and to output a piston position signal, and a piston from the displacement detecting unit A resonance frequency of a system consisting of a piston and a resonance spring based on a top dead center position detection unit that detects a top dead center position of a piston from a position signal, and a piston position signal from a displacement detection unit and an AC voltage applied to the piston by a driving unit. The drive unit determines the voltage value of the piston driving force applied to the piston based on the top dead center position detected by the top dead center position detection unit, and the top dead center position detection unit detects It is determined whether the detected top dead center position matches a predetermined condition, and if the position is matched, the drive unit controls the piston based on the resonance frequency detected by the resonance frequency detection unit. And a control unit that determines the frequency of the piston driving force to be applied, so that not only is the top dead center position always maintained at a desired position when the piston performs reciprocating motion, but also temperature conditions, pressure conditions, and the like. This is a vibration type compressor that can reciprocate the piston at the resonance frequency even when the external condition changes, thereby improving the compression efficiency.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a vibration type compressor according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a vibration compressor according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the second embodiment of the present invention.

FIG. 5 is a configuration diagram of a vibration compressor according to a third embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the third embodiment of the present invention.

FIG. 7 is a configuration diagram of a vibration compressor according to a fourth embodiment of the present invention.

FIG. 8 is a flowchart showing the operation of the fourth embodiment of the present invention.

FIG. 9 is a configuration diagram of a vibrating compressor according to a fifth embodiment of the present invention.

FIG. 10 is a flowchart showing the operation of the fifth embodiment of the present invention.

FIG. 11 is a configuration diagram of a conventional vibration type compressor.

[Explanation of symbols]

 100 (a) Suction valve 100 (b) Discharge valve 101 Cylinder 102 Piston 103 Drive unit 104 Resonance spring 105 Displacement detection unit 106 Top dead center position detection unit 107 Operating frequency detection unit 108 Voltage detection unit 109 Resonance frequency detection unit 110 Control unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shusaku Watanabe 4-2-5 Takaidahondori, Higashiosaka-shi, Osaka Matsushita Refrigeration Co., Ltd.

Claims (5)

[Claims] 1. A cylinder having a cylindrical body provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and applying an AC voltage to the piston as a piston driving force to drive the piston. A drive unit, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the piston position detected by the displacement detection unit A top dead center position detection unit that detects a top dead center position of the piston from a signal, an operation frequency detection unit that detects an operation frequency of the piston from the piston position signal detected by the displacement detection unit, and the driving unit A voltage detection unit that detects a voltage value of the piston driving force applied to the piston, the operation frequency detected by the operation frequency detection unit, and the voltage detection unit A resonance frequency detection unit that detects a resonance frequency of a system including the piston and the resonance spring from the voltage value detected by the driving unit, based on the top dead center position detected by the top dead center position detection unit. Determines the voltage value of the piston driving force applied to the piston, and determines the frequency of the piston driving force applied to the piston by the driving unit based on the resonance frequency detected by the resonance frequency detection unit. And a control unit. 2. A cylinder having a cylindrical body provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and applying an AC voltage to the piston as a piston driving force to drive the piston. A drive unit, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the piston position detected by the displacement detection unit A top dead center position detection unit that detects a top dead center position of the piston from a signal, an operation frequency detection unit that detects an operation frequency of the piston from the piston position signal detected by the displacement detection unit, and the driving unit A current detection unit that detects a current value of the piston driving force applied to the piston, the operation frequency detected by the operation frequency detection unit, and the current detection unit A resonance frequency detection unit that detects a resonance frequency of a system including the piston and the resonance spring from the current value detected by the driving unit, based on the top dead center position detected by the top dead center position detection unit. Determines the voltage value of the piston driving force applied to the piston, and determines the frequency of the piston driving force applied to the piston by the driving unit based on the resonance frequency detected by the resonance frequency detection unit. And a control unit. 3. A cylinder having a cylindrical body provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and applying an AC voltage to the piston as a piston driving force to drive the piston. A drive unit, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the piston position detected by the displacement detection unit A top dead center position detection unit that detects the top dead center position of the piston from a signal, the piston position signal detected by the displacement detection unit and the AC voltage applied to the piston by the driving unit and the piston and the piston A resonance frequency detection unit that detects a resonance frequency of a system composed of a resonance spring; a time measurement unit that measures a certain time and transmits a signal when measurement is completed; The drive unit determines a voltage value of the piston driving force applied to the piston based on the top dead center position detected by the position detection unit, and the resonance frequency detection unit is configured based on a signal from the timing unit. And a control unit for determining a frequency of the piston driving force applied to the piston by the driving unit based on the detected resonance frequency. 4. A cylinder having a cylindrical body provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and driving the piston by applying an AC voltage to the piston as a piston driving force. A drive unit, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the piston position detected by the displacement detection unit A top dead center position detecting unit that detects a top dead center position of the piston from a signal, the piston position signal detected by the displacement detecting unit, and the AC voltage applied to the piston by the driving unit and the piston and the piston. A resonance frequency detection unit that detects a resonance frequency of a system composed of a resonance spring; a time measurement unit that measures a certain time and transmits a signal when measurement is completed; The drive unit determines a voltage value of the piston driving force applied to the piston based on the top dead center position detected by the position detection unit, and detects the top dead center position based on a signal from the timing unit. The drive unit applies to the piston based on the resonance frequency detected by the resonance frequency detection unit when it is determined whether the top dead center position detected by the unit matches a predetermined condition. And a control unit for determining a frequency of the piston driving force. 5. A cylinder having a cylindrical body provided with a suction valve and a discharge valve, a piston moving in the cylinder in an axial direction, and applying an AC voltage to the piston as a piston driving force to drive the piston. A drive unit, a resonance spring connected to the piston, a displacement detection unit connected in the axial direction of the piston to detect displacement of the piston and output as a piston position signal, and the piston position detected by the displacement detection unit A top dead center position detection unit that detects the top dead center position of the piston from a signal, the piston position signal detected by the displacement detection unit and the AC voltage applied to the piston by the driving unit and the piston and the piston A resonance frequency detection unit that detects a resonance frequency of a system including a resonance spring; and the driving unit based on the top dead center position detected by the top dead center position detection unit. Determine the voltage value of the piston driving force to be applied to the piston, and if the top dead center position detected by the top dead center position detection unit is determined to match a predetermined condition, A vibrating compressor comprising: a control unit that determines a frequency of the piston driving force applied to the piston by the driving unit based on the resonance frequency detected by the resonance frequency detecting unit.