JP5167090B2 - Damping device and air conditioner - Google Patents

Description

  The present invention relates to a vibration damping device and an air conditioner including the vibration damping device.

In general, when a device for generating vibration such as an engine is installed, a vibration isolator or a vibration control device that absorbs or suppresses the vibration is used. Specifically, a configuration in which a device as a vibration source is supported by a liquid-filled vibration isolator that absorbs vibration by an elastic body and liquid (see, for example, Patent Document 1), or a device as a vibration source via an actuator A configuration is known in which vibration is suppressed by generating an excitation vibration with an actuator so as to cancel the vibration of the device (see, for example, Patent Document 2).
JP 2002-250574 A JP-A-11-351616

By the way, the conventional apparatus as described above has a problem that the cost is high because it requires a complicated configuration. For example, an anti-vibration device of a type that absorbs vibration needs to use expensive parts and materials including a liquid-filled anti-vibration device in order to obtain a high vibration damping effect. Furthermore, material characteristics and component specifications must be appropriately selected according to the period and amplitude of vibration generated by the device as the vibration source, and the period and amplitude of vibration that can be effectively damped are limited. Further, for example, in a configuration that suppresses vibration by generating an excitation vibration using an actuator, a control circuit that performs a complicated calculation for calculating the period, amplitude, and phase of the excitation vibration generated by the actuator is required. An actuator that operates at a quick response speed and a control circuit that operates the actuator in accordance with the calculated period, amplitude, and phase are also required, and an increase in cost is inevitable.
Therefore, an object of the present invention is to effectively suppress vibration by a configuration that can be realized at low cost.

In order to solve the above-described problems, the present invention provides a detection unit that detects vibration of a vibration source device including a rotation shaft, an actuator disposed on a support base that supports the vibration source device, and the actuator. A drive circuit unit for driving, wherein the vibration source device is provided with a plurality of fixing units, and each of the support bases supports the fixing unit and is located on one side of the rotating shaft. The actuator is disposed on the support base, the support base is configured to support the fixed portion from below, the actuator is disposed between the support base and the fixed portion, and the rotation shaft The detection unit is disposed on the support base located on the other side, and the support base includes a hanger that supports the suspension of the fixing unit, and the support unit is disposed between the hanger and the fixing unit. detector is disposed, The actuator includes a magnetostrictive element disposed between the support base and the vibration source device, and a magnetic field coil that generates a magnetic field around the magnetostrictive element, and the detection unit includes the vibration source. A magnetostrictive element disposed at a position to be pressed in response to vibration of the device, and a detection coil disposed around the magnetostrictive element, and the drive circuit unit is configured to press the magnetostrictive element of the detection unit. Driving the magnetostrictive element of the actuator by causing a current having the same phase as the electromotive force to flow in the magnetic field coil of the actuator based on a periodic electromotive force generated in the detection coil according to pressure, and A vibration damping device is provided.
According to this configuration, the actuator having the magnetostrictive element is provided on the support base that supports the vibration source device, and the detection unit including the magnetostrictive element that is pressed along with the vibration of the vibration source device is provided. When an electromotive force is generated in the detection coil in accordance with the pressing force applied to the magnetostrictive element of the detection unit, a current based on this electromotive force is passed through the magnetic coil of the actuator to drive the magnetostrictive element. Correspondingly, vibration can be suppressed by driving the actuator. In this configuration, the electromotive force generated in the detection coil due to the change in the magnetic permeability of the magnetostrictive element due to the vibration of the device is utilized, and a current based on this electromotive force is caused to flow in the magnetic field coil of the actuator. It does not require a complicated circuit configuration for driving at a high speed. That is, since the electromotive force as a result of detecting the vibration is used as a current for driving the actuator, effective vibration suppression can be performed with a simple configuration that can be easily realized at low cost. Further, by using a magnetostrictive element for both vibration detection and actuator drive, the vibration source device responds to vibration generated in a very short time and drives the actuator, so that vibration can be effectively suppressed.

Further , according to the above configuration , the vibration of the device can be reliably ensured by interposing the actuator and the detection unit between the support base that supports the device of the vibration source and the fixing unit provided in the device of the vibration source. In addition, vibration can be effectively suppressed by the operation of the actuator.

Further, according to the above configuration, when the vibration source device has a rotation shaft, the actuator is disposed on one side through the rotation shaft, and the detection unit is disposed on the other side. For this reason, when the device vibrates so as to rotate about the rotation axis, the vibration is surely detected by the detection unit, and the actuator is quickly driven by the current based on the detected vibration. Vibration can be suppressed.
In addition, the vibration source device vibrates so as to rotate about the rotation axis, the stress applied to the detection unit disposed on one side of the rotation shaft via the hanger, and the actuator disposed on the other side. When the phase of the applied stress coincides, the current based on the detected vibration can be passed through the magnetic field coil at the timing when the stress is applied to the actuator. Thereby, the actuator can be driven at an effective timing by a simple configuration that can be easily realized at low cost, and vibration can be effectively suppressed.

In the above-described configuration, the vibration source device generates periodic vibration, and the drive circuit unit periodically generates in the detection coil of the detection unit according to the periodic vibration of the vibration source device. The phase of the electromotive force may be shifted, and a current based on the electromotive force may be passed through the magnetic field coil of the actuator.
In this case, the vibration source device vibrates so as to rotate about the rotation axis, the stress applied to the detection unit disposed on one side of the rotation shaft, and the stress applied to the actuator disposed on the other side. In response to this phase shift, a current based on the detected vibration can be caused to flow through the magnetic field coil at a timing when stress is applied to the actuator. Thereby, the actuator can be driven at an effective timing by a simple configuration that can be easily realized at low cost, and vibration can be effectively suppressed.

Further, the present invention provides an air conditioner including a gas engine having a rotating shaft that drives a compressor, and is disposed on a detection unit that detects vibration of the gas engine and a support base that supports the gas engine. An actuator and a drive circuit unit for driving the actuator, wherein the gas engine is provided with a plurality of fixing parts, and each of the support bases supports the fixing parts, and The actuator is disposed on the support base located on one side, the support base is configured to support the fixed portion from below, and the actuator is disposed between the support base and the fixed portion. The detection unit is disposed on the support base located on the other side of the rotation shaft, and the support base includes a hanger for supporting the suspension of the fixing unit. The detector between the fixing portion is disposed between said actuator includes a magnetostrictive element disposed between the support base and the gas engine, the magnetic field generates a magnetic field around the magnetostrictive element A coil, and the detection unit includes a magnetostrictive element disposed at a position pressed in response to vibration of the gas engine, and a detection coil disposed around the magnetostrictive element, and the drive circuit unit Is based on a periodic electromotive force generated in the detection coil in response to a pressing force applied to the magnetostrictive element of the detection unit, and by causing a current having the same phase as the electromotive force to flow in the magnetic field coil of the actuator, There is provided an air conditioner characterized by driving the magnetostrictive element of an actuator.
According to this configuration, in the air conditioner, the actuator having the magnetostrictive element is provided on the support base that supports the gas engine, and the detection unit including the magnetostrictive element that is pressed along with the vibration of the gas engine is provided. When an electromotive force is generated in the detection coil in accordance with the pressing force applied to the magnetostrictive element of the detection unit, a current based on this electromotive force is passed through the magnetic coil of the actuator to drive the magnetostrictive element. By driving the actuator, vibration can be suppressed. In this configuration, since the electromotive force as a result of detecting the vibration of the gas engine is used as a current for driving the actuator, a complicated circuit configuration for driving the actuator at an appropriate timing is not required, and the cost is low. With a simple configuration that can be easily realized, effective vibration control can be performed. Further, by using a magnetostrictive element for both vibration detection and actuator driving, the actuator responds to the vibration generated by the gas engine in a very short time and drives the actuator, so that vibration can be effectively suppressed. And by suppressing the vibration of the gas engine, it is possible to omit the installation of a flexible tube or the like that is a piping member for absorbing the vibration transmitted to the refrigerant piping, and the cost of the entire air conditioner is greatly reduced. be able to.
In addition, it is possible to simplify and reduce the thickness of strength members that were conventionally required as countermeasures for gas engine vibration, such as sheet metal for fixing piping, and it is also necessary for absorbing stress including flexible tubes. Since it is possible to shorten or simplify the R part of the refrigerant pipe shape and the handling length, it is possible not only to reduce the cost but also to improve the performance by improving the pressure loss. .

  According to the present invention, vibration can be effectively suppressed with a simple configuration that can be easily realized at low cost without requiring a complicated circuit configuration.

[First Embodiment]
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a gas engine-driven air conditioner 1 according to a first embodiment to which the present invention is applied.
The air conditioner 1 includes an outdoor unit 2 and a plurality of indoor units 3a to 3c, which are connected by an inter-unit pipe 4 including a liquid pipe 4a and a gas pipe 4b. The outdoor unit 2 accommodates a gas engine 10, a generator 11 that generates power using the driving force of the gas engine 10, and a compressor 12 that compresses the refrigerant using the driving force of the gas engine 10. The gas engine 10 generates a driving force by burning a mixture of fuel gas or other fuel supplied through the fuel adjustment valve 7 and air supplied through the throttle valve 8.

The compressor 12 includes compressors 12a and 12b having large and small capacities, and these two compressors 12a and 12b are connected to a drive shaft 10a (see FIG. 3) of the gas engine 10 via a transmission belt 60 (see FIG. 2). ). Electromagnetic clutches 14a and 14b are respectively provided between the drive shaft 10a of the gas engine 10 and the compressors 12a and 12b, and the drive shaft 10a and the compressors 12a and 12b can be contacted and separated by the electromagnetic clutches 14a and 14b. It is.
The discharge pipes 12c of the compressors 12a and 12b are connected in the order of the plate heat exchanger 31, the four-way valve 15, and the outdoor heat exchanger 17, and each outdoor unit is connected to the outdoor heat exchanger 17 via the liquid pipe 4a. Expansion valves 19a to 19c of 3a to 3c and indoor heat exchangers 21a to 21c are connected. A four-way valve 15 is connected to the indoor heat exchangers 21a to 21c via a gas pipe 4b. Are connected to the compressors 12a and 12b via the suction pipe 12d. Further, the discharge pipe 12c and the suction pipe 12d of the compressors 12a and 12b are connected by a bypass pipe 18, and a bypass valve 20 for unloading is provided in the bypass pipe 18. In the configuration of the first embodiment, a refrigerant circuit is formed by the above-described devices.

  The refrigerant circuit can be switched between the heating operation and the cooling operation by the four-way valve 15. When the switching state of the four-way valve 15 is heating switching, when the compressors 12a and 12b are driven by the gas engine 10, the compressors 12a and 12b, the four-way valve 15, and the indoor heat exchanger 21a are indicated by solid arrows. To 21c, the expansion valves 19a to 19c, and the outdoor heat exchanger 17, the refrigerant circulates in order, and the room is heated by the refrigerant condensation heat in the indoor heat exchangers 21a to 21c. On the contrary, if the four-way valve 15 is switched to cooling, the compressors 12a and 12b, the four-way valve 15, the outdoor heat exchanger 17, the expansion valves 19a to 19c, and the indoor heat exchanger are indicated by the broken arrows. The refrigerant circulates in the order of 21a to 21c, and the room is cooled by the refrigerant evaporation heat in the indoor heat exchangers 21a to 21c.

  The gas engine 10 is a water-cooled type, and the cooling water circulated through the water jacket of the gas engine 10 is supplied to the radiator 25 through the first three-way valve 22, the reverse power flow heater 23, and the second three-way valve 24. . The radiator 25 is arranged side by side with the outdoor heat exchanger 17, and these are air-cooled by air sent by the same blower 26. The cooling water that has passed through the radiator 25 flows in the order of the cooling water pump 27 and the exhaust gas heat exchanger 29 and is returned to the water jacket of the gas engine 10. Exhaust gas from the gas engine 10 is passed through the exhaust gas heat exchanger 29, and this exhaust gas is discharged out of the outdoor unit 2 through the exhaust top 30.

The first three-way valve 22 described above is automatically switched according to the temperature of the cooling water. That is, when the cooling water temperature is lower than the predetermined temperature, the cooling water from the water jacket of the gas engine 10 is bypassed by the radiator 25 and directly led to the cooling water pump 27 and the exhaust gas heat exchanger 29 in this order. Return to the jacket.
The second three-way valve 24 is switched, for example, during heating operation. In this case, the cooling water bypasses the radiator 25, passes through the plate heat exchanger 31, and flows in the order of the cooling water pump 27 and the exhaust gas heat exchanger 29. Returned to the water jacket.

  On the other hand, a grid interconnection inverter 33 is connected to the generator 11 via a power line 32. The grid interconnection inverter 33 converts the three-phase AC power from the generator 11 into DC power via an AC / DC converter, and then converts it back into 200 V three-phase AC power and outputs it to the commercial system 35. To do. The commercial system 35 includes a commercial power source 36, a breaker 37, and a customer load 38, and the grid interconnection inverter 33 is connected between the breaker 37 and the customer load 38.

  Further, the grid interconnection inverter 33 appropriately supplies power to the above-described reverse flow heater 23 and is communicably connected to the outdoor controller 39 of the outdoor unit 2 via the communication line 40. The outdoor controller 39 obtains operating power from the commercial system 35 via the power line 41 and is communicably connected to the indoor controllers of the indoor units 3a to 3c via the communication line 42.

A power detector 43 installed between the commercial power source 36 and the breaker 37 is connected to the grid interconnection inverter 33. The power detector 43 acquires the power value supplied to the commercial system 35 in real time. The power value data acquired here is input to the grid interconnection inverter 33 and sent to the outdoor controller 39 via the communication line 40.
Further, the grid interconnection inverter 33 has a function of controlling the power generation amount of the generator 11 and decreases or increases the power generation amount as necessary. In such a configuration, for example, the load on the compressors 12a and 12b increases according to the air-conditioning request on the indoor units 33a to 3c side, and the power generation request increases according to the increase in the consumer load 38 of the commercial system 35. In this case, the load on the gas engine 10 increases. The customer load 38 is constantly monitored by the power detector 43, the grid interconnection inverter 33, and the outdoor controller 39. The grid interconnection inverter 33 is connected to the commercial system 35 via a power line 47, and the power generated by the generator 11 can be output to the commercial system 35 through the power line 47. A part of this electric power is output to the blower 26 of the outdoor unit 2, the cooling water pump 27, and the blowers 48 a to 48 c of the indoor units 3 a to 3 c, thereby realizing no power supply.

Next, the configuration of the outdoor unit 2 will be described.
FIG. 2 is a rear view of the outdoor unit 2. In FIG. 2, the description of the panel covering the outside of the casing of the outdoor unit 2 is omitted.
As shown in FIG. 2, the outdoor unit 2 includes a casing 52 formed in a substantially rectangular parallelepiped shape, and the inside of the casing 52 is defined in two upper and lower stages by a partition plate 53 extending substantially horizontally. . The upper stage includes a heat exchange chamber 54 in which the outdoor heat exchanger 17 (see FIG. 1) and the blower 26 are provided, and the lower stage includes the gas engine 10, the generator 11, the compressor 12, and the like. A machine room 55 is configured.
The partition plate 53 partitions both chambers without any gap so that rainwater or the like entering the heat exchange chamber 54 through the gaps between the fins of the blower 26 and the outdoor heat exchanger 17 does not enter the machine chamber 55. In the partition plate 53, two vent holes 56 that connect the heat exchange chamber 54 and the machine chamber 55 are provided at intervals in the width direction of the outdoor unit 2. Each vent 56 communicates with both chambers so that the air inside the outdoor unit 2 can freely move between the two chambers. Each vent 56 is provided with a roof portion 56a so that rainwater or the like does not enter the machine room 55 from the heat exchange chamber 54 side, and the air on the machine room 55 side is indicated by an arrow X shown in FIG. To the heat exchange chamber 54.

  Two blowers 26 are arranged in the width direction on the top surface 52a of the casing 52 of the outdoor unit 2. The blower 26 takes the outside air into the heat exchange chamber 54 through the gaps between the fins of the outdoor heat exchangers arranged on the front side and the back side of the heat exchange chamber 54 respectively. Heat exchange is performed with the refrigerant flowing through the refrigerant 17 (FIG. 1). Then, the heat-exchanged air is exhausted upward of the outdoor unit 2 by the blower 26. An exhaust top 30 for exhausting exhaust gas from the gas engine 10 to the outside of the outdoor unit 2 is provided on the top surface 52a of the casing 52.

  Although not shown, a front panel, a back panel, and a side panel are disposed on the front, back, and side surfaces of the machine room 55, respectively. In this configuration, each of the front panel and the rear panel is composed of a pair of left and right panels, and a vertical frame 57 that supports the panels is provided between the two panels. The front panel, the back panel, and the side panel are detachably attached (openable and closable) to each frame of the casing 52 with screws or the like. When these panels are attached, the outdoor unit 2 has a watertight structure in which rainwater or the like does not enter the machine room 55.

FIG. 3 is a cross-sectional view of the machine room 55 as viewed from above. Note that the upper side in FIG. 3 corresponds to the back side, and the lower side corresponds to the front side.
Inside the machine room 55, the gas engine 10 is disposed at a substantially central portion of the bottom plate 55 a, the generator 11 is disposed on the front right side of the gas engine 10, and two compressors 12 are disposed on the front left side of the gas engine 10. Are arranged side by side. An outdoor controller 39 is disposed on the front side of the compressor 12 and on the left side of the vertical frame 57 described above. The outdoor controller 39 controls the operation of each device (for example, the gas engine 10, the electromagnetic clutches 14a and 14b, the four-way valve 15, and the blower 26) disposed in the outdoor unit 2.

  A grid interconnection inverter 33 is disposed on the front side of the generator 11 and on the right side of the vertical frame 57. Electric power generated by the generator 11 is sent to the grid interconnection inverter 33 via the power line 32 (FIG. 1). Therefore, the grid interconnection inverter 33 is arranged near the generator 11. The outdoor controller 39 and the grid interconnection inverter 33 are arranged on the front side of the machine room 55 so as to be divided into left and right by the vertical frame 57. Further, the box bodies 39 a and 33 a that house the outdoor controller 39 and the grid interconnection inverter 33 are both formed so that the front side is open, and the opening on the front side of the box bodies 39 a and 33 a is the front side of the machine room 55. When the panel is attached, it is blocked by the front panel. That is, each front panel is also used as a member that closes the front surface of the box 39A, 33A of the outdoor controller 39 and the grid interconnection inverter 33 and the front surface of the machine room 55.

As shown in FIG. 3, the gas engine 10 has a drive shaft 10 a serving as an output shaft, and the drive shaft 10 a protrudes substantially horizontally from both ends of the gas engine 10. A drive pulley 58 for winding transmission is attached to a shaft end portion on the left side (one end side) of the drive shaft 10a. A drive pulley 59 is also attached to the driven shaft of the compressor 12, and a transmission belt 60 is wound around these drive pulleys 58 and 59. Thereby, the rotational power of the gas engine 10 is transmitted to the compressor 12 via the transmission belt 60, and the compressor 12 is driven.
On the other hand, the rotor (not shown) of the generator 11 is connected to the shaft end on the right side (the other end side) of the drive shaft 10a, and this driving force is used when the gas engine 10 is driven. Then, the generator 11 operates. In this configuration, the rotor (not shown) of the generator 11 is directly connected to the drive shaft 10a, thereby reducing the mechanical loss when the rotor is rotationally driven, thereby improving the power generation efficiency. Further, the compressor 12 is provided on one end side of the drive shaft 10a of the gas engine 10, the generator 11 is provided on the other end side, and the rotor of the generator 11 is directly connected to the drive shaft 10a. In addition, the gas engine 10, the generator 11, and the compressor 12 are compactly arranged in the casing 52 of the outdoor unit 2.
In FIG. 3, reference numeral 61 denotes an accumulator, 62 denotes an oil separator, 63 denotes an air cleaner, 64 denotes an intake box, 65 denotes an exhaust muffler, and 66 denotes an oil sub tank. The oil sub tank 66 is disposed between the generator 11 and the right side opening 52b of the casing 52. For this reason, when the generator 11 is maintained, the side panel is removed to open the right side opening 52b, and the generator 11 is accessed through the space above the oil sub tank 66. Therefore, in a configuration in which other devices are arranged close to the generator 11, it is desirable to reduce labor by reducing the frequency of maintenance of the generator 11.

Next, a support structure for the gas engine 10 will be described.
As shown in FIG. 3, the gas engine 10 has four mount connecting portions 13 a to 13 d (fixed portions) arranged at substantially four corners of the gas engine 10, and the mount connecting portions 13 a to 13 d are respectively bottom plates 55 a. Are supported from below by four stands 70a to 70d (support bases).
FIG. 4 is a perspective view showing the gas engine 10 and its support structure.
As shown in FIG. 4, the mount connecting portion 13a of the gas engine 10 is connected to the mount 70a, the mount connecting portion 13b is connected to the mount 70b, and the mount connecting portion 13d is connected to the mount 70d. ing. Further, although hidden in FIG. 4, the mount connecting portion 13c (FIG. 3) is connected on the gantry 70c (FIG. 3). The gas engine 10 is fixed to the bottom plate 55a by these four mounts 70a to 70d.

The gantry 70a includes a flat plate seat surface portion 71 fixed to the bottom plate 55a by bolts (not shown), a column 72 standing on the seat surface portion 71, and a plate fixed to the upper end of the column 72 by welding or the like. Shaped mounting portion 73. The mounting portion 73 is substantially parallel to the bottom plate 55a and is substantially horizontal when the outdoor unit 2 (FIGS. 2 and 3) is installed. The gantry 70b has the same configuration as the gantry 70a. In addition, the gantry 70c and 70d are configured in the same manner as the gantry 70a, but instead of the seat surface portion 71, the base 70c and the longitudinal seat surface portion 74 straddling the gantry 70d are shared. That is, a support column 72 constituting the gantry 70 c is erected at one end of the seat surface portion 74, and a support column 72 structuring the pedestal 70 d is erected at the other end, and placed on the upper end of each column 72. The part 73 is fixed.
Mount connecting portions 13a to 13d are mounted and fixed on the mounting portions 73 of the gantry 70a to 70d via an engine mount 75 (support) that absorbs vibration of the gas engine 10.

FIG. 5 is a cross-sectional view of the main part showing the support structure of the gas engine 10 in detail, FIG. 5A shows the structure of the mount connecting portion 13b and the gantry 70b, and FIG. 5B shows the structure of the mount connecting portion 13a and the pedestal 70a. . In FIG. 5A, only the sensor 80 is shown in cross section, and the other parts are shown in a side view. Similarly, FIG. 5B shows a cross section only for the actuator 90, and the other parts show a side view.
The sensor 80 and the actuator 90 constitute a vibration damping device together with a drive circuit 101 (FIG. 6) described later.

  As shown in FIG. 5A, the engine mount 75 mounted on the mounting portion 73 of the gantry 70b has a configuration in which a vibration-proof rubber 78 is sandwiched between flat mount brackets 76 and 77. The anti-vibration rubber 78 is made of an elastic material such as natural rubber or synthetic rubber, and absorbs vibration of the gas engine 10. Each of the mount brackets 76 and 77 is a flat plate member made of metal, and the mount bracket 76 positioned below the anti-vibration rubber 78 is fixed to the mounting portion 73 with a bolt (not shown) or the like.

And the sensor 80 as a detection part is arrange | positioned between the engine mount 75 and the mount connection part 13b.
The sensor 80 has a configuration in which the giant magnetostrictive element 85 is sandwiched between a pressure pin 81 fixed to the lower surface of the mount connecting portion 13 b and a pressure pin 82 fixed to the upper surface of the mount bracket 77. The pressure pin 81 is fixed to the mount bracket 77 by a bolt 81b, and the pressure pin 82 is fixed to the lower surface of the mount connecting portion 13b by a bolt 82b.
The giant magnetostrictive element 85 (magnetostrictive element) is a giant magnetostrictive element piece formed in a cylindrical or prismatic shape. A magnetostrictive element is a magnetic material having a property (so-called Joule effect) that changes the element size in response to an external magnetic field such as a coil or a magnet. Among them, the response time when a dimensional change occurs in response to a magnetic field. A material that has a short time of nsec (nanoseconds) to μsec (microseconds) and has a dimensional change amount of 100 to 1000 ppm or more and causes a large dimensional change is generally called a giant magnetostrictive element. In addition, when the magnetostrictive element is elastically deformed by an external stress, the magnetostrictive element has a characteristic (so-called “biliary effect”) in which the magnetic permeability changes according to the strength, speed, and elastic deformation amount of the stress. The giant magnetostrictive element 85 is configured using the above giant magnetostrictive element material.
The giant magnetostrictive element 85 is accommodated in a yoke 84 formed of a magnetic material such as iron in a cylindrical shape, and a magnetic material 88 is disposed above and below the yoke. As the magnetic body 88, other magnetic bodies such as a magnet and an iron material can be used.

A protrusion 81 a that protrudes downward is provided at the center of the pressure pin 81, and the tip (lower end) of the protrusion 81 a is formed in a flat plate shape. This flat plate portion is formed on the magnetic body 88 in the yoke 84. Abut. Further, a protrusion 82 a that protrudes upward is erected at the center of the pressure pin 82, and the tip (upper end) of the protrusion 82 a is formed in a flat plate shape, and this flat plate portion is a magnetic body in the yoke 84. 88 abuts.
That is, the giant magnetostrictive element 85 of the sensor 80 is disposed between the mount connecting portion 13 b and the engine mount 75 via the magnetic body 88 and the pressure pins 81 and 82, and the convex pressure pin 81. , 82 from above and below in the figure.
A detection coil 86 is disposed so as to surround the periphery of the yoke 84. Since the giant magnetostrictive element 85 is arranged inside the detection coil 86, when the stress is applied to the giant magnetostrictive element 85 and the permeability of the giant magnetostrictive element 85 changes, the inductance of the detection coil 86 changes. An electromotive force is generated at both ends of the detection coil 86, and a current flows through the detection coil 86. Lead wires 87 are connected to both ends of the detection coil 86, and the electromotive force of the detection coil 86 and the current flowing through the detection coil 86 can be detected via the lead wires 87.
Since the giant magnetostrictive element 85 is sandwiched between the mount connecting portion 13b and the engine mount 75 via the pressure pins 81 and 82 as described above, the weight of the gas engine 10 is reduced when the gas engine 10 is stopped. A corresponding load is applied to the giant magnetostrictive element 85. During operation of the gas engine 10, when the mount connecting portion 13 b approaches the engine mount 75 due to vibration of the gas engine 10, a load exceeding the stop time is applied, and when the mount connecting portion 13 b moves away from the engine mount 75, the gas engine 10 stops. Load becomes smaller than time. The giant magnetostrictive element 85 is elastically deformed in the vertical direction in the figure in accordance with the stress applied via the pressure pins 81 and 82, and the permeability is changed along with the deformation, and the change in the permeability is detected. An electromotive force is generated between both ends of the coil 86. Therefore, an electromotive force corresponding to the vibration state of the gas engine 10 is generated between both electrodes of the lead wire 87.
Since the magnetic body 88 acts to form a magnetic path concentrated on the giant magnetostrictive element 85, when the giant magnetostrictive element 85 is pressurized via the pressure pins 81 and 82 by arranging the magnetic body 88. In addition, a large amount of electric power is generated by the detection coil 86, and the detection accuracy is improved. It is not essential to provide the magnetic body 88, and other configurations are possible as long as a configuration in which the magnetic path is concentrated on the super magnetostrictive element 85 can be realized.

On the other hand, as shown in FIG. 5B, an actuator 90 is disposed between the mount connecting portion 13a and the gantry 70a.
The actuator 90 has a configuration in which the giant magnetostrictive element 95 is sandwiched between a connecting pin 91 fixed to the lower surface of the mount connecting portion 13 a and a connecting pin 92 fixed to the upper surface of the mount bracket 77. The connecting pin 91 is fixed to the mount bracket 77 by a bolt 91b, and the connecting pin 92 is fixed to the lower surface of the mount connecting portion 13a by a bolt 92b.
The giant magnetostrictive element 95 (magnetostrictive element) is obtained by molding a giant magnetostrictive element material similar to the giant magnetostrictive element 85 into a cylindrical or prismatic shape. The giant magnetostrictive element 95 is accommodated in a cylindrical sleeve 94, and a magnetic body 98 as a yoke is disposed above and below the giant magnetostrictive element 95. As the magnetic body 88, other magnetic bodies such as a magnet and an iron material can be used.

A projection 91 a that protrudes downward is provided at the center of the connecting pin 91, and the tip (lower end) of the projection 91 a is formed in a flat plate shape, and this flat plate portion contacts the magnetic body 98 in the sleeve 94. Touch. Further, a projection 92 a protruding upward is provided at the center of the connecting pin 92, and the tip (upper end) of the projection 92 a is formed in a flat plate shape. This flat plate portion is a magnetic body 98 in the sleeve 94. Abut. That is, the giant magnetostrictive element 85 of the actuator 90 is disposed between the mount connecting portion 13a and the engine mount 75 via the magnetic body 98 and the connecting pins 91 and 92, and is connected to the convex connecting pins 91 and 92. Is pressed from above and below in the figure.
The actuator 90 includes a magnetic field coil 96 surrounding the sleeve 94. The super magnetostrictive element 95 is a coil for causing a dimensional change of the super magnetostrictive element 95 by applying a magnetic field around the super magnetostrictive element 95, and the super magnetostrictive element 95 changes its dimensions in accordance with the magnetic field. Let A lead wire 97 is connected to the magnetic field coil 96 so that a magnetic field can be generated by supplying a current to the magnetic field coil 96 from the outside.

  When the magnetic field coil 96 applies a magnetic field, a dimensional change of the giant magnetostrictive element 95, in particular, a dimensional change in the vertical direction in the figure occurs, and the connecting pins 91 and 92 are pressed away from each other by this dimensional change. Is transmitted to the mount connecting portion 13a and the engine mount 75. Therefore, in the actuator 90, a force can be applied to the mount connecting portion 13 a and the engine mount 75 in a direction away from each other by passing a current through the magnetic field coil 96.

  The sensor 80 shown in FIG. 5A and the actuator 90 shown in FIG. 5B are shown to have substantially the same configuration, but the size and shape of each part may be different. Specifically, the giant magnetostrictive element 85 and the giant magnetostrictive element 95, the magnetic body 88 and the magnetic body 98, and the detection coil 86 and the magnetic field coil 96 may have the same shape and size. Of course, the size and shape of the actuator may be different from each other in order to obtain a specification suitable as an actuator. For example, the detection coil 86 and the magnetic field coil 96 may be coils having different turns.

The gas engine 10 is a reciprocating engine that rotates a drive shaft 10a (FIG. 4) as a rotation shaft, and has, for example, four-cylinder cylinders arranged in series. For this reason, the vibration during the operation of the gas engine 10 is a reciprocating operation in a direction of rotation about the drive shaft 10a. Therefore, the mount coupling portions 13a to 13d have an upward force and a downward force. Are given alternately. In other words, a vertical force is periodically applied to the mount connecting portions 13a to 13d.
Furthermore, as shown in FIG. 4, the mount connecting portion 13a shown in FIG. 5A and the mount connecting portion 13b shown in FIG. 5B are in positions facing each other via the drive shaft 10a. For this reason, during operation of the gas engine 10, vibrations are applied symmetrically to the mount connecting portion 13a and the mount connecting portion 13b. That is, when a downward pressing force is applied to the mount connecting portion 13a, an upward force is applied to the mount connecting portion 13b, and then an upward force is applied to the mount connecting portion 13a at the same time. A downward force is applied to the mount connecting portion 13b. Thus, among the mount coupling portions 13a to 13d, on one side and the other side of the drive shaft 10a, the phase of stress periodically applied by vibration is shifted by approximately 180 degrees.

FIG. 6 is a block diagram illustrating a configuration of a control system that operates the actuator 90 in the air-conditioning apparatus 1. For convenience of understanding, diagrams (reference numerals 100a and 100b) illustrating examples of waveforms of currents input and output by the drive circuit 101 are also illustrated.
As shown in FIG. 6, a driving circuit 101 (driving circuit unit) is connected to the magnetic field coil 96 via a lead wire 97, and a current is passed through the magnetic field coil 96 by the driving circuit 101 so that the giant magnetostrictive element 95 ( 5B) is extended in the vertical direction and driven as an actuator.

A lead wire 87 connected to both ends of the detection coil 86 is connected to the drive circuit 101, and the voltage between both electrodes of the lead wire 87 corresponds to the pressing force applied to the giant magnetostrictive element 85 by the vibration of the gas engine 10. Based on the electromotive force generated in the detection coil 86, it periodically changes as indicated by reference numeral 100a in the figure.
The drive circuit 101 includes an amplifier circuit that amplifies the voltage across the lead wire 87 and a phase shift circuit that shifts the phase of the voltage waveform amplified by the amplifier circuit, and amplifies the voltage across the lead wire 97. At the same time, the phase is shifted by 180 degrees (the phase is inverted) and output to the lead wire 97. Due to the function of this drive circuit 101, for example, the voltage waveform indicated by reference numeral 100a in the figure becomes a waveform indicated by reference numeral 100b by amplifying the amplitude twice and shifting the phase by 180 degrees. Based on the waveform subjected to the amplification and phase shift, the drive circuit 101 causes a current to flow through the lead wire 97, so that the giant magnetostrictive element 95 undergoes a dimensional change corresponding to the waveform indicated by reference numeral 100b.

As described above, since the gantry 70b provided with the sensor 80 and the gantry 70a provided with the actuator 90 are located opposite to each other with the drive shaft 10a interposed therebetween, the sensor is caused by vibration accompanying the operation of the gas engine 10. 80 and the actuator 90 are pressed alternately. That is, the giant magnetostrictive elements 85 and 95 are pressed alternately.
Therefore, when a current based on the electromotive force generated in the detection coil 86 of the sensor 80 is shifted to the magnetic field coil 96 by shifting the phase by 180 degrees, the giant magnetostrictive element is shifted at a timing deviated from the timing when the giant magnetostrictive element 85 is pressed. 95 extends. Thereby, when the giant magnetostrictive element 95 is pressed by the mount connecting portion 13a, the giant magnetostrictive element 95 can be extended against the pressing force to suppress vibration.

  Here, the amplifier circuit included in the drive circuit 101 only needs to have a function of amplifying the input voltage from the detection coil 86. For example, the amplifier circuit can be easily realized using a known class B push-pull circuit. The shift circuit can be easily realized by using, for example, a known phase shift circuit using a transistor. It is also easy to realize an amplifier circuit and a phase shift circuit using an inverting amplifier circuit having both functions of amplification and phase inversion. That is, the drive circuit 101 can be configured by a very simple analog circuit, and does not need to have a complicated signal analysis process or signal generation circuit. For this reason, it can be realized at an extremely low cost and hardly causes problems such as installation space.

The drive circuit 101 is connected to an engine control unit 105 that controls the fuel adjustment valve 7, the throttle valve 8, and the ignition coil 9 based on the detection value of the rotation speed sensor 102. The engine control unit 105 automatically controls the opening degree of the fuel adjustment valve 7, the opening degree of the throttle valve 8, and the ignition timing by the ignition coil 9 according to the load demand of the indoor units 3a to 3c, and rotates the gas engine 10 by a predetermined rotation. Drive by number.
A signal corresponding to the rotation of the gas engine 10 may be input from the engine control unit 105 to the drive circuit 101 (for example, a pulse is input every rotation). In this case, the drive circuit 101 amplifies and phase-shifts the voltage across the lead wire 87, and further shapes the signal waveform based on the signal from the engine control unit 105, thereby matching the rotation cycle of the gas engine 10. Can be output to the lead wire 97, so that even if the voltage change at both ends of the detection coil 86 deviates from the rotation cycle of the gas engine 10, this is corrected to obtain a desired waveform. By passing a current through the lead wire 97, vibration can be suppressed more effectively.
Further, the drive circuit 101 detects a shift between a signal input from the engine control unit 105 and a change in voltage input through the lead wire 97, and the drive circuit 101 when the shift exceeds a predetermined level. It is good also as a structure which outputs a signal to the engine control part 105 from. In this case, the drive circuit 101 can detect the deviation between the rotation timing of the gas engine 10 and the vibration cycle of the gas engine 10 to quickly detect abnormal vibration of the gas engine 10 and notify the engine control unit 105 of it. The engine control unit 105 can take measures such as quickly stopping the gas engine 10 when abnormal vibration occurs.
Furthermore, the drive circuit 101 is configured with a more intelligent one, and a vibration pattern of the gas engine 10 is generated based on a signal input from the engine control unit 105. This pattern and the voltage input through the lead wire 97 are generated. The abnormal vibration of the gas engine 10 may be detected by comparing the change.

  As shown in FIG. 3, the gas engine 10 includes four mount connecting portions 13a to 13d, and is supported from below by gantry 70a to 70d, respectively. As shown in FIG. 4, a sensor 80 is disposed on the mount connecting portions 13b and 13d located on one side of the drive shaft 10a, and an actuator is provided on the mount connecting portions 13a and 13c located on the other side of the drive shaft 10a. 90 is arranged. That is, as shown in FIGS. 5A and 5B, the sensor 80 and the actuator 90 are arranged in the mount connecting portions 13c and 13d as in the mount connecting portions 13a and 13b. Using the sensor 80 and the two actuators 90, it can be effectively suppressed.

  As described above, according to the first embodiment to which the present invention is applied, the actuator 90 having the giant magnetostrictive element 95 is provided on the gantry 70a, 70c that supports the gas engine 10 in the air conditioner 1, and the gas When a sensor 80 having a giant magnetostrictive element 85 that is pressed in accordance with the vibration of the engine 10 is provided and an electromotive force is generated in the detection coil 86 according to the pressing force applied to the giant magnetostrictive element 85 by the vibration of the gas engine 10, Since the current based on the electromotive force is caused to flow through the magnetic field coil 96 of the actuator 90 by the drive circuit 101 to drive the giant magnetostrictive element 95, the vibration can be suppressed by driving the actuator 90 corresponding to the vibration of the gas engine 10. In this configuration, the electromotive force as a result of detecting the vibration of the gas engine 10 is used as it is as a current for driving the actuator 90 through simple processing (amplification and phase shift). Therefore, effective vibration control can be performed by the drive circuit 101 that can be easily realized at low cost without requiring a complicated circuit configuration for driving at low cost. Further, by using the giant magnetostrictive element for both the vibration detection by the sensor 80 and the driving of the actuator 90, it is possible to respond to the vibration of the gas engine 10 in a very short time and to drive the actuator 90, thereby effectively damping the vibration. it can.

In the air conditioner 1, expensive flexible piping is used in the refrigerant piping connected to the compressor 12 attached to the gas engine 10 so that vibration is not transmitted to other piping. As described above, if vibration of the gas engine 10 can be suppressed, a part or all of the flexible piping can be omitted, and the cost of the air conditioner 1 as a whole can be greatly reduced. Furthermore, since the influence of vibration on the cooling water pipe connected to the exhaust gas heat exchanger 29 mounted on the gas engine 10 and other pipes can be reduced, the durability of each part of the air conditioner 1 can be improved, and the outdoor unit There are various advantages in that the degree of freedom of layout of each part in 2 is increased.
Furthermore, it is possible to simplify and reduce the thickness of the strength members that were conventionally required as a countermeasure against vibration of the gas engine 10, such as a sheet metal for fixing the piping, and it is also necessary for absorbing stress including a flexible tube. It has become possible to shorten or simplify the R part of the refrigerant piping shape and the handling length, so it is possible not only to reduce costs but also to improve performance by improving pressure loss Become.

In addition, the actuator 90 and the sensor 80 are interposed between the gantry 70a to 70d that supports the gas engine 10 and the mount connecting portions 13a to 13d provided in the gas engine 10, thereby ensuring vibration of the gas engine 10. In addition, the vibration can be effectively suppressed by the operation of the actuator 90. Furthermore, since the actuator 90 is disposed on one side with respect to the drive shaft 10a of the gas engine 10 and the sensor 80 is disposed on the other side, vibration in a direction rotating around the drive shaft 10a of the gas engine 10 is provided. Can be reliably detected by the sensor 80, and the actuator 90 can be quickly driven by the current based on the detected vibration, thereby effectively suppressing the vibration.
Here, the drive circuit 101 detects that the phase of the stress applied to the sensor 80 disposed on one side of the drive shaft 10a and the stress applied to the actuator 90 disposed on the other side are shifted. Since the phase of the electromotive force between the two poles of the coil 86 is shifted and a current is passed through the actuator 90, the giant magnetostrictive element 95 can be driven at the timing when stress is applied to the actuator 90 to effectively suppress vibration.

[Second Embodiment]
In the first embodiment, the sensor 80 and the actuator 90 are both arranged on the mounts 70a to 70d that support the mount connecting portions 13a to 13d from below, and the stress applied to the sensor 80 is taken as an example. However, the present invention is not limited to this, and the sensor 80 and the actuator 90 are applied with the same phase stress. However, the present invention is applicable. This configuration will be described as a second embodiment.

FIG. 7 is a view showing a support structure of the gas engine 10 according to the second embodiment to which the present invention is applied. FIG. 7A shows the structure of the mount connecting portion 13b and the mount 70b, and FIG. 7B is the mount connecting portion 13a. The structure of the gantry 70a is shown. In FIG. 7A, only the sensor 80 is shown in cross section, and the other parts are shown in a side view. FIG. 7B similarly shows a cross-section only for the actuator 90, and the other parts show a side view. FIG. 8 is a block diagram showing the configuration of a control system that operates the actuator 90 in the second embodiment. For convenience of understanding, FIG. 8 also shows a chart (reference numerals 100c and 100d) showing examples of waveforms of currents input and output by the drive circuit 101.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the configuration shown in FIG. 7A, the hanger 110 is fixed to the mounting portion 73 of the gantry 70b. The hanger 110 includes a flat mount bracket 76 placed on the placement portion 73, a bracket 111 having a C shape in a side view, and a vibration isolating rubber 78 sandwiched between the mount bracket 76 and the bracket 111. And. The bottom plate 111a that constitutes the bottom surface of the bracket 111 is fixed to the top surface of the anti-vibration rubber 78, and a space having a C-shaped cross section of the bracket 111 is formed at the top of the gantry 70b. A mount connecting portion 13b is inserted into and supported by a C-shaped space formed by the bracket 111. A suspension bolt 112 is suspended from the top plate 111 b of the bracket 111, and the mount connecting portion 13 b is suspended and supported by the suspension bolt 112.

A sensor 80 is disposed between the top plate 111b and the mount connecting portion 13b. The pressure pin 81 is fixed to the top plate 111b by the bolt 81b so that the protrusion 81a faces downward, and the pressure pin 82 is fixed to the mount connecting portion 13b by the bolt 82b so that the protrusion 82a faces upward. The giant magnetostrictive element 85 is disposed together with the two magnetic bodies 88 so as to be sandwiched between the protrusion 81a and the protrusion 82a. The giant magnetostrictive element 85 and the magnetic body 88 are accommodated in a cylindrical yoke 84, a detection coil 86 is disposed so as to surround the yoke 84, and lead wires 87 are connected to both ends of the detection coil 86. Yes.
Here, the distance between the top plate 111b and the mount connecting portion 13b can be adjusted by the length of the suspension bolt 112 and the tightening position of the nut screwed to the suspension bolt 112. It is preferable that this distance does not cause a gap between the projection 81a, the magnetic body 88, the giant magnetostrictive element 85, the magnetic body 88, and the projection 82a when the gas engine 10 is stopped. For example, the top plate 111b and the mount connecting portion 13b may be brought as close as possible so as to press the sensor 80, and the mount connecting portion 13b may be fixed by the suspension bolt 112. In this state, the giant magnetostrictive element 85 is not subjected to stress when the gas engine 10 is stopped, and is subjected to stress due to vibration of the gas engine 10 during operation of the gas engine 10.

On the other hand, as shown in FIG. 7B, an actuator 90 is disposed between the gantry 70a and the mount connecting portion 13a, as in the first embodiment.
And the sensor 80 and the actuator 90 are connected via the drive circuit 101 similarly to the said 1st Embodiment. That is, as shown in FIG. 8, the lead wire 87 extending from the detection coil 86 of the sensor 80 is connected to the drive circuit 101, and the voltage generated between both ends of the detection coil 86 is input to the drive circuit 101. On the other hand, the lead wire 97 of the actuator 90 is connected to the drive circuit 101. When a current is passed through the lead wire 97 by the drive circuit 101, the giant magnetostrictive element 95 changes in size and pushes the mount connecting portion 13a upward.

As described above, the vibration of the gas engine 10 is a movement in the direction of rotation about the drive shaft 10a. At the same time as the mount connecting portion 13a shown in FIG. 7B moves downward, the mount connecting portion 13b shown in FIG. Next, the mount connecting portion 13a moves upward and at the same time the mount connecting portion 13b moves downward. This movement is repeated periodically.
In the sensor 80, when the mount coupling portion 13b moves upward, the giant magnetostrictive element 85 is pressed from below by the mount coupling portion 13b, and an electromotive force is generated in the detection coil 86. When the mount connecting portion 13b moves from the top to the bottom, the pressing force applied to the giant magnetostrictive element 85 is released, and the giant magnetostrictive element 85 returns to its original size.
For this reason, the stress applied to the giant magnetostrictive element 85 from the mount connecting portion 13b and the stress applied to the giant magnetostrictive element 95 from the mount connecting portion 13a are in phase.

In this configuration, if the drive circuit 101 is configured as an amplifier circuit that amplifies and outputs the voltage value of the lead wire 87 without shifting the phase, the drive connection unit 101 a is super at the timing when the mount connecting portion 13 a presses the giant magnetostrictive element 95. The magnetostrictive element 95 expands and vibrations of the gas engine 10 can be suppressed.
In the configuration according to the second embodiment, stress is applied to the giant magnetostrictive element 85 only while the mount connecting portion 13b moves above the position when the gas engine 10 is stopped. For this reason, the voltage value at both ends of the lead wire 87 has a waveform in which a positive voltage waveform and a constant voltage period are alternately repeated as illustrated by reference numeral 100c in FIG. The drive circuit 101 of the second embodiment amplifies the voltage indicated by reference numeral 100c so that the amplitude is almost doubled as indicated by reference numeral 100d. Since the phase is not shifted by this amplification, a current flows through the lead wire 97 at a timing when stress is applied to the giant magnetostrictive element 85, and the giant magnetostrictive element 95 extends to press the mount connecting portion 13a. Note that the drive circuit 101 may shift the phase by one wavelength.

  As described above, in the configuration according to the second embodiment, the gantry 70a located on one side of the drive shaft 10a supports the mount connecting portion 13a from below, while the gantry located on the other side of the drive shaft 10a. 70b includes a hanger 110 that supports the mount connecting portion 13b in a suspended manner. An actuator 90 is provided between the mount 70a and the mount connecting portion 13a, and a sensor 80 is provided between the hanger 110 and the mount connecting portion 13b. Therefore, when the gas engine 10 vibrates in the direction of rotation about the drive shaft 10a, the sensor 80 and the actuator 90 are subjected to stress in the same phase. In this configuration, the drive circuit 101 causes a current having the same phase as the periodic electromotive force generated in the detection coil 86 of the sensor 80 to flow in the magnetic field coil 96 of the actuator 90, so that the stress is applied to the actuator 90 to the magnetic field coil 96. By passing an electric current, vibration can be effectively suppressed.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied within the scope of the present invention.
For example, in each of the above-described embodiments, the sensor 80 is disposed in the mount coupling portions 13b and 13d located on one side of the drive shaft 10a, and the actuator 90 is disposed in the other mount coupling portions 13a and 13c. The vibration of the gas engine 10 that vibrates around the shaft 10a is suppressed. In other words, the pair of sensors 80 and the actuator 90 need only be arranged on the opposite sides of the drive shaft 10a. For example, the sensors 80 are mounted on the mount connecting portions 13b and 13d on the same side with respect to the drive shaft 10a. And the actuator 90 may be respectively disposed, and the sensor 80 and the actuator 90 may be respectively disposed on the mount coupling portions 13a and 13c. Also in this case, the lead wire 87 of the sensor 80 arranged on the opposite side via the drive shaft 10a and the lead wire 97 of the actuator 90 are connected via the drive circuit 101 to shift the input phase of the lead wire 87. If the signal is output to the lead wire 97, a high vibration damping effect can be obtained as in the above configuration. As described above, the degree of freedom regarding the arrangement of the actuator 90 that suppresses vibration is high, and is not limited to the configuration of each of the above-described embodiments. In consideration of the above, the actuator 90 may be arranged at a portion where vibration is to be preferentially suppressed.

Furthermore, you may provide both the sensor 80 and the actuator 90 in one mount connection part 13a-13d. In this case, the sensor 80 and the actuator 90 may be arranged in series in the vertical direction and interposed between the mount connecting portion and the mount, or the sensor 80 and the actuator 90 may be arranged side by side. Further, it is also possible to drive the super magnetostrictive element 85 of the sensor 80 as a super magnetostrictive element of the actuator by flowing a current through the lead wire 87 of the sensor 80 to suppress the vibration of the gas engine 10. In this case, an electromotive force generated in the detection coil 86 is detected at the timing of detecting the vibration, and a current is supplied to the lead wire 87 at the timing of suppressing the vibration by driving the giant magnetostrictive element 85. Further, the yoke 84 in the sensor 80 may be a cylindrical body that supports the giant magnetostrictive element 85 and the like so as not to drop off, and the magnetic body 98 in the actuator 90 is not essential and may be omitted. That is, the magnetic body 98 may be omitted as long as the magnetic path in the giant magnetostrictive element 95 is correctly formed.
Furthermore, in each embodiment, the structure in which the gas engine 10 is supported at the four points of the mount connecting portions 13a to 13d has been described as an example. However, the present invention is not limited to this, and the gas engine 10 It is also possible to provide three mount connecting portions on the two and support them at three points by three mounts. In this case, based on the electromotive force generated in the detection coil 86 of one sensor 80 located on one side of the drive shaft 10a, current can flow through the lead wires 97 of the two actuators 90 located on the other side of the drive shaft 10a. For example, the same effects as those of the respective embodiments can be obtained.
Further, in the first embodiment, the gantry 70a to 70d supports the mount connecting portions 13a to 13d via the engine mount 75, but the arrangement of the engine mount 75 can be omitted. Similarly, in the second embodiment, the configuration in which the gantry 70a supports the mount connecting portion 13b via the hanger 110 has been described. However, the vibration-proof rubber 78 is eliminated from this configuration, and the bracket 111 is mounted on the column 72 or the mounting. It is good also as a structure fixed to the mounting part 73. FIG.

  Further, the vibration control device to which the present invention is applied is not limited to the support structure of the gas engine 10 in the air conditioner 1, but is a device that generates vibration that rotates about a predetermined axis, such as a reciprocating engine. If applied to the support structure, vibrations can be effectively suppressed and useful, but it can of course be applied to the support structure of other devices, and the application range is not particularly limited. One specific detailed configuration can be arbitrarily changed.

It is a circuit diagram showing the air harmony machine concerning a 1st embodiment. It is a rear view of an outdoor unit. It is sectional drawing which looked at the machine room from the upper side. It is a principal part perspective view which shows a gas engine and its support structure. It is principal part sectional drawing which shows the support structure of a gas engine. It is a block diagram which shows the control system of an actuator. It is principal part sectional drawing which shows the support structure of the gas engine in 2nd Embodiment. It is a block diagram which shows the control system of the actuator in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 2 Outdoor unit 3a-3c Indoor unit 10 Gas engine (vibration source apparatus)
10a Drive shaft (rotary shaft)
12 Compressor 13a-13d Mount connection part (fixed part)
17 Outdoor Heat Exchanger 26 Blower 54 Heat Exchange Room 55 Machine Room 70a to 70d Mounting Base (Supporting Base)
75 Engine mount (support)
80 sensor (detector)
81, 82 Pressurizing pin 84 Yoke 85 Super magnetostrictive element 86 Detection coil 87 Lead wire 88 Magnetic body 90 Actuator 91, 92 Connection pin 95 Super magnetostrictive element 96 Magnetic coil 97 Lead wire 98 Magnetic body 101 Drive circuit (drive circuit section)

Claims (2)

A detection unit that detects vibrations of a vibration source device having a rotation shaft, an actuator disposed on a support base that supports the vibration source device, and a drive circuit unit that drives the actuator,
The vibration source apparatus is provided with a plurality of fixing portions, and each of the support bases supports the fixing portions,
The actuator is disposed on the support base located on one side of the rotating shaft, and the support base is configured to support the fixed portion from below, and the actuator is provided between the support base and the fixed portion. Is arranged,
The detection unit is disposed on the support base located on the other side of the rotation shaft, and the support base includes a hanger for supporting the suspension of the fixing unit, and the hanger and the fixing unit. The detection unit is disposed between
The actuator includes a magnetostrictive element disposed between the support base and the vibration source device, and a magnetic field coil that generates a magnetic field around the magnetostrictive element,
The detection unit includes a magnetostrictive element disposed at a position to be pressed with vibration of the vibration source device, and a detection coil disposed around the magnetostrictive element,
The drive circuit unit causes a current having the same phase as the electromotive force to flow in the magnetic field coil of the actuator based on a periodic electromotive force generated in the detection coil according to a pressing force applied to the magnetostrictive element of the detection unit. Thereby driving the magnetostrictive element of the actuator;
Damping device characterized by In an air conditioner including a gas engine having a rotating shaft for driving a compressor,
A detector that detects vibrations of the gas engine, an actuator disposed on a support that supports the gas engine, and a drive circuit unit that drives the actuator,
The gas engine is provided with a plurality of fixing portions, and each of the support bases supports the fixing portions,
The actuator is disposed on the support base located on one side of the rotating shaft, and the support base is configured to support the fixed portion from below, and the actuator is provided between the support base and the fixed portion. Is arranged,
The detection unit is disposed on the support base located on the other side of the rotation shaft, and the support base includes a hanger for supporting the suspension of the fixing unit, and the hanger and the fixing unit. The detection unit is disposed between
The actuator includes a magnetostrictive element disposed between the support base and the gas engine, and a magnetic field coil that generates a magnetic field around the magnetostrictive element,
The detection unit includes a magnetostrictive element disposed at a position pressed along with vibration of the gas engine, and a detection coil disposed around the magnetostrictive element,
The drive circuit unit causes a current having the same phase as the electromotive force to flow in the magnetic field coil of the actuator based on a periodic electromotive force generated in the detection coil according to a pressing force applied to the magnetostrictive element of the detection unit. Thereby driving the magnetostrictive element of the actuator;
An air conditioner characterized by.

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