WO2000003142A1 - Frequency converter assembly - Google Patents

Frequency converter assembly Download PDF

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Publication number
WO2000003142A1
WO2000003142A1 PCT/JP1999/003666 JP9903666W WO0003142A1 WO 2000003142 A1 WO2000003142 A1 WO 2000003142A1 JP 9903666 W JP9903666 W JP 9903666W WO 0003142 A1 WO0003142 A1 WO 0003142A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency converter
pressure vessel
pump
converter assembly
case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP1999/003666
Other languages
French (fr)
Japanese (ja)
Inventor
Masakazu Yamamoto
Yoshio Miyake
Junya Kawabata
Keita Uwai
Yoshiaki Miyazaki
Katsuji Iijima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebara Corp
Original Assignee
Ebara Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ebara Corp filed Critical Ebara Corp
Priority to AU46493/99A priority Critical patent/AU4649399A/en
Publication of WO2000003142A1 publication Critical patent/WO2000003142A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/068—Mechanical details of the pump control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0686—Mechanical details of the pump control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/12—Motor parameters of rotating hydraulic motors
    • F04B2203/1201—Rotational speed

Definitions

  • the present invention relates to a frequency converter for adjusting the performance of a fluid machine such as a pump, and more particularly to a frequency converter assembly in which a pressure vessel and a frequency converter are integrated.
  • inverter frequency converter
  • FIG. 20 is a diagram showing a configuration of a conventional motor pump operated by an inverter.
  • the motor pump 101 has a configuration in which the pump 103 and the motor 104 are directly connected on the common base 102, It is operated by being supplied with power from the inverter 106. During this operation, the suction liquid sucked in from the suction pipe 107 and discharged from the pump 103 flows through the check valve 108, the gate valve 109 and the discharge pipe 110. It is pumped to a fixed place.
  • the present invention provides a frequency converter (inverter) that can easily adjust the performance of a pump, as a kind of piping element (a gate valve, a check valve, etc.) used around the pump. It is another object of the present invention to provide a frequency converter assembly capable of simplifying the installation of inverter equipment.
  • the present invention includes a pressure vessel having a fluid inlet and a fluid outlet, and a frequency converter typified by an inverter provided outside the pressure vessel. It is characterized by the following.
  • the suction port and the discharge port of the pressure vessel are connected to other piping elements (gate valve, Alternatively, the frequency converter can be installed close to the motor pump by connecting to a pump, and the heat generated by the frequency converter is effectively radiated to the fluid flowing through the pressure vessel.
  • a cooling fan like a general inverter is not required, and the reliability of the inverter can be improved.
  • a case made of a heat conductive conductor such as an aluminum alloy that accommodates the frequency converter and hermetically seals it from outside air is provided, and the case is attached to the pressure vessel in close contact. This completely shuts off the frequency converter from the outside air through the case, prevents the frequency converter from being affected by moisture around the pump and rain outside, The fluid flowing in the container can be cooled more effectively.
  • the pressure vessel and a part of the case are integrated.
  • the number of parts and the number of assembling steps as a frequency converter assembly can be reduced, and productivity can be improved.
  • the pressure vessel serves as at least one of a gate valve, a check valve, a pressure tank, and a strainer. This makes it possible to more effectively use the pressure vessel and improve workability when the motor pump is operated at a variable speed by the frequency converter.
  • a pressure sensor is attached to the pressure vessel, and the pressure of the pump is controlled in combination with a pump. This makes it possible to construct an automatic variable pump control system that can automatically follow the load fluctuations of the pump with a constant discharge pressure, and is effective mainly when used for water supply equipment.
  • a flow rate measuring unit is provided in the pressure vessel, and a pump flow rate is controlled in combination with a pump.
  • a pump flow rate is controlled in combination with a pump.
  • various sensors are arranged at a boundary between the pressure vessel and a case accommodating the frequency converter.
  • the signals of the sensors can be guided to the frequency converter by the internal signal cable without passing through the external cable, thereby simplifying the overall configuration and increasing the tension on the cables of the sensors.
  • the disconnection can avoid trouble.
  • FIG. 1A and 1B show a first embodiment of a frequency converter assembly according to the present invention
  • FIG. 1A is a front view
  • FIG. 1B is a cross-sectional view taken along line I-I of FIG. 1A. You.
  • FIG. 2 is a front view showing an example of use of the frequency converter assembly shown in FIG. 3A and 3B show a second embodiment of the frequency converter assembly according to the present invention.
  • FIG. 3A is a front view
  • FIG. 3B is a sectional view taken along line III-III of FIG. 3A. .
  • FIG. 4A and 4B show a third embodiment of the frequency converter assembly according to the present invention.
  • FIG. 4A is a front view
  • FIG. 4B is a sectional view taken along line IV-IV of FIG. 4A. You.
  • FIG. 5A and 5B show a fourth embodiment of the frequency converter assembly according to the present invention.
  • FIG. 5A is a front view
  • FIG. 5B is a sectional view taken along line VV of FIG. 5A. You.
  • FIG. 6A and 6B show a fifth embodiment of the frequency converter assembly according to the present invention.
  • FIG. 6A is a front view
  • FIG. 6B is a side view.
  • FIG. 7 is a front view showing an example of use of the frequency converter assembly shown in FIG. 8A and 8B show a sixth embodiment of the frequency converter assembly according to the present invention.
  • FIG. 8A is a front view
  • FIG. 8B is a cross-sectional view of a check valve portion.
  • FIG. 9 is a front view showing an example of use of the frequency converter assembly shown in FIG.
  • FIG. 10 is a diagram showing a seventh embodiment of the frequency converter assembly according to the present invention, and is a front view having a partial cross section.
  • FIG. 11 is a front view showing an example of use of the frequency converter assembly shown in FIG.
  • FIG. 12 is a view showing an eighth embodiment of the frequency converter assembly according to the present invention, and is a front view having a partial cross section.
  • FIG. 13 is a front view showing an example of use of the frequency converter assembly shown in FIG.
  • FIG. 14 is a diagram showing a ninth embodiment of the frequency converter assembly according to the present invention, and is a front view having a partial cross section.
  • FIG. 15 is a front view showing an example of use of the frequency converter assembly shown in FIG.
  • FIG. 16 is a diagram showing a tenth embodiment of the frequency converter assembly according to the present invention, and is a front view having a partial cross section.
  • FIGS. 17A and 17B are views showing a first embodiment of the frequency converter assembly according to the present invention
  • FIG. 17A is a front view having a partial cross section
  • FIG. FIG. 17 is a sectional view taken along the line XVI I—XVI I of FIG. 17A.
  • FIG. 18 is a front view showing an example of use of the frequency converter assembly shown in FIG.
  • FIG. 19 is a front view showing a 12th embodiment of the frequency converter assembly according to the present invention.
  • FIG. 20 is a front view showing a conventional example. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIGS. 1A, IB, and 2 are diagrams showing a first embodiment of the frequency converter assembly of the present invention.
  • FIG. 1A is a front view
  • FIG. FIG. 2 is a front view showing the state of use of the device.
  • the frequency converter assembly includes a substantially cylindrical pressure vessel 1 having a liquid suction port 1 a and a liquid discharge port 1 b at both ends, and a pressure vessel 1 outside the pressure vessel 1. It mainly comprises a case 2 fixed to the side surface, and the frequency converter body 3 is housed inside the case 2.
  • Mounting flanges 4 and 5 are provided on the outer peripheral surfaces of both ends of the pressure vessel 1, and flat plate-shaped brackets 7 reinforced with a plurality of ribs 6 are integrally provided on the outer surface.
  • the mounting flanges 4 and 5 are provided with pressure measuring holes 8 and 9 communicating the inside and the outside of the pressure vessel 1, and the pressure measuring holes 8 and 9 are closed by plugs 10 and 11.
  • the case 2 is composed of a base 12 and a cover 13 made of, for example, an aluminum alloy having good heat conductivity, and is bolted with a sealing member 14 interposed between the contact surfaces of the two. By concluding, airtightness with the outside air is maintained.
  • the camp 15 is provided with, for example, an output frequency adjusting means which is constituted by a step switch of a tally type so that the rotation speed of the fluid machine can be appropriately adjusted.
  • the frequency converter body 3 is fixed to the base 12 with good adhesion, and transmits the generated heat to the base 12.
  • base 1 2 is almost entirely
  • the bracket 7 is fixed to the bracket 7 by fasteners such as bolts in a state where the bracket 7 is in close contact with the surface of the bracket 7. Thereby, the heat generated in the frequency converter main body 3 is efficiently transmitted from the base 12 to the pressure vessel 1, and is appropriately radiated to the intake fluid flowing in the pressure vessel 1. This eliminates the need for an air-cooling fan used in general inverters, and there is no fear of cooling failure due to fan failure.
  • the base 12 has an input cable 16 as an input means of the power to the frequency converter, and an output cable as an output means of the power whose frequency has been converted by the frequency converter.
  • One end of 17 is connected.
  • an airtight underwater cable is used to prevent air from flowing between the core wire and the insulator, and between the insulator and the cable covering material. ing.
  • the underwater cable is used as the input and output means, and as described above, the case 2 is sealed, so that the frequency converter body 3 housed in the case 2 is completely shut off from the outside air.
  • the frequency converter body 3 is not affected by moisture around the pump or rain outside.
  • the other end of the input cable 16 is connected to the control panel 105, the other end of the output cable 1 ⁇ is connected to the motor 104, and the power supplied from the control panel 105 is The motor is guided to a frequency converter, and the frequency-converted power is supplied to the motor 104, thereby controlling the rotation speed of the motor 104.
  • the frequency converter can be installed close to the motor pump 101 via the pressure vessel 1, and the generated heat of the frequency converter is effectively radiated to the fluid in the pressure vessel 1. You. Then, the frequency converter can be completely shut off from the outside air via the case 2 to prevent the frequency converter from being affected by moisture around the pump or rain outside.
  • FIG. 3A and 3B are views showing a second embodiment of the frequency converter assembly of the present invention, wherein FIG. 3A is a front view having a partial cross section, and FIG. FIG. 4 is a sectional view taken along line ⁇ - ⁇ ⁇ .
  • female threads 20 and 21 for connection are provided on the inner peripheral surfaces of the suction port la and the discharge port 1 b of the pressure vessel 1. And one end of the pressure vessel 1 is connected to the suction pipe and the other end is connected to the pump via the internal thread portions 20 and 21.
  • FIGS. 4A and 4B are views showing a third embodiment of the frequency converter assembly according to the present invention.
  • FIG. 4A is a front view
  • FIG. 4B is a cross section taken along line IV-IV of FIG. 4A.
  • FIG. In the present embodiment, a cup-shaped bracket 30 that is opened upward is integrally formed on the outer surface of the pressure vessel 1, and a cover member 14 is interposed between the open end of the bracket 30 and a sealing member 14.
  • a case 2 that seals the frequency converter body 3 between the bracket 30 and the cover 13 is configured.
  • Other configurations are the same as those of the first embodiment shown in FIGS. 1A and 1B.
  • the case 2 for accommodating the pressure vessel 1 and the frequency converter body 3 By integrating some parts (the same molded product), the number of assembly steps and the number of parts of the frequency converter assembly can be reduced, and the productivity can be improved.
  • FIGS. 5A and 5B are views showing a fourth embodiment of the frequency converter assembly of the present invention
  • FIG. 5A is a front view having a partial cross section
  • FIG. -It is a V line sectional view.
  • a bracket 30 that forms a part of the case 2 is integrally formed on the outer surface of the pressure vessel 1. It is.
  • female threads 20 and 21 for connection are provided on the inner peripheral surfaces of the suction port 1 a and the discharge port 1 b of the pressure vessel 1.
  • One end of the pressure vessel 1 is connected to the suction pipe and the other end is connected to the pump via the internal threads 20 and 21.
  • Other configurations are the same as those of the third embodiment shown in FIGS. 4A and 4B.
  • FIGS. 6A, 6B and 7 are diagrams showing a fifth embodiment of the frequency converter assembly of the present invention.
  • FIG. 6A is a front view
  • FIG. 6B is a side view
  • the frequency converter assembly is integrated with the gate valve 40, and the valve body 41 with the built-in valve body is used as a pressure vessel.
  • a bracket 7 was formed integrally with the valve body (pressure vessel) 4 1, and a case 2 consisting of a base 12 containing the frequency converter body and a cover 13 was fixed inside the bracket 7. Things.
  • this gate valve 40 is used as a part of a piping element by being installed between the suction pipe 107 and the suction side of the pump 103.
  • the motor pump 1 is provided by using the valve body 41 of the gate valve 40 used around the pump as a pressure vessel.
  • 0 1 for variable speed operation by inverter Workability can be improved. That is, instead of the conventional general gate valve, the gate body 41 is used as the pressure vessel of the frequency converter assembly. Installation becomes possible. This is a great advantage because, when introducing an inverter to an existing motor pump, it is only necessary to replace a part of the existing piping elements, and there is no need to change the piping.
  • FIGS. 8A, 8B and 9 are views showing a sixth embodiment of the frequency converter assembly of the present invention
  • FIG. 8A is a front view
  • FIG. FIG. 9 is a front view showing the state of use.
  • a check valve 50 is integrated with a frequency converter assembly.
  • the valve body 53 incorporating the valve body 51 and the valve sheet 52 is used as a pressure vessel
  • the valve body (pressure vessel) 53 has the example shown in FIGS. 6A and 6B.
  • a bracket (not shown) similar to the above is integrally formed, and a base 2 containing a frequency converter main body and a case 2 consisting of a cover 13 are fixed to the bracket.
  • the check valve 50 is used as a part of a piping element by being provided between the discharge side of the pump 103 and the gate valve 109.
  • the opening and closing of the valve element 51 of the check valve 50 is taken out as a signal of ONZ ⁇ FF by a lead switch or the like.
  • a read switch signal line 54 is provided, and this signal is taken in a frequency converter and controlled.
  • a pump protection function can be added. For example, if the frequency converter is powered on and a check valve close signal is output, it is detected as shutoff operation of the pump and the pump is stopped. Prevent burn-in. If the actual head is high in the pump equipment, If the number of revolutions is lowered too much during performance adjustment, a shut-off operation may occur. However, this configuration protects the pump, and can more reliably save energy by performance adjustment.
  • FIGS. 10 and 11 are views showing a seventh embodiment of the frequency converter assembly of the present invention.
  • FIG. 10 is a front view having a partial cross section, and FIG. FIG.
  • a frequency converter assembly is integrated with a strainer 61. That is, the strainer main body 62 containing the filter 60 is used as a pressure vessel, and the bracket 7 is integrally formed with the strainer main body (pressure vessel) 62.
  • a base 2 containing the frequency converter body and a case 2 consisting of a cover 13 are fixed.
  • the strainer 61 is used as a part of a piping element by being installed between the suction pipe 107 and the suction side of the pump 103.
  • a pressure measuring hole 64 is provided in the mounting flange 63 located downstream of the strainer 61, and the pressure measuring hole 64 is provided in the mounting flange 63.
  • a pressure sensor 65 is mounted, and the pressure signal is taken from the signal cable 66 to the inverter and controlled.
  • a pump protection function can be added. For example, by installing the strainer 61 shown in Fig. 10 on the suction side of the pump and stopping the pump when the pressure drops below a certain set pressure, the filter 60 of the strainer 61 is clogged. The pump can be prevented from being damaged due to abnormally low suction pressure, for example, when the suction side gate valve is forgotten to be opened.
  • FIGS. 12 and 13 are views showing an eighth embodiment of the frequency converter assembly of the present invention.
  • FIG. 12 is a front view having a partial cross section
  • FIG. 13 is a use state thereof.
  • FIG. The embodiment shown in FIG. It is equipped with a force sensor to take the pressure signal into the frequency converter. That is, a pressure sensor 70 is attached to a pressure measurement hole 9 provided in one of the mounting flanges 5 of the pressure vessel 1, and a pressure signal detected by the pressure sensor 70 is sent to the inside of the inverter via a signal cable 71. To control the pump discharge pressure.
  • Other configurations are the same as those of the first embodiment shown in FIGS. 1A and 1B. Then, as shown in FIG. 13, this pressure vessel 1 is used as a part of a pipe between the discharge side of the pump 103 and the gate valve 109.
  • control software inside the inverter using the pressure signal is used for controlling the general discharge pressure constant control and the estimated terminal pressure constant control by the automatic variable speed control of the pump.
  • the use of a transducer assembly allows the user to build and utilize an automatic variable speed control system for the pump without special expertise.
  • the frequency converter assembly of this embodiment mainly for water supply equipment, etc., it is possible to automatically follow the load fluctuation of the pump, and it becomes an effective energy saving means.
  • the constant discharge pressure control is to change the pump speed mainly by inverter control to change the performance of the pump and to keep the discharge pressure constant at any flow rate.
  • the discharge pressure of the pump is detected, the result is compared with a target value, the result is increased or decreased by inverter control, and the discharge pressure is kept constant.
  • the constant control of estimated end pressure is a method of controlling along the constant estimated end pressure line, while the constant discharge pressure control method controls the pump discharge pressure to be constant at the required pressure at the maximum water volume. That is. That is, by making the discharge pressure of the pump smaller as the amount of water used is smaller, the pressure fluctuation at the end is smaller and the power consumption is reduced as compared with the discharge pressure constant control method. It is a method that can be done.
  • FIGS. 14 and 15 are views showing a ninth embodiment of the frequency converter assembly of the present invention.
  • FIG. 14 is a front view having a partial cross section, and FIG. FIG.
  • a pressure vessel is provided with a flow measuring unit and a pressure sensor is attached. That is, a flow rate measuring section 80 made up of, for example, an orifice is provided inside the pressure vessel 1, and the suction side pressure sensor 81 And discharge side pressure sensors 82, respectively, and the pressure signals detected by these pressure sensors 81, 82 are taken into the inverter via signal cables 83, 84 to control the pump flow rate. It is configured to perform Other configurations are the same as those of the first embodiment shown in FIGS. 1A and 1B. Then, as shown in FIG. 15, the pressure vessel 1 is used as a part of a pipe between the discharge side of the pump 103 and the check valve 108.
  • the user can have no special expertise.
  • An automatic variable speed control system for the pump can be constructed and used.
  • it when used mainly for cold / hot water circulation equipment, it is possible to automatically follow an increase in pipe resistance due to aging of the equipment, and this is an effective energy saving means.
  • the constant flow control means that the flow rate (flow rate) of the pump is detected by, for example, a flow rate sensor and compared with a target value. Is kept constant.
  • FIG. 16 shows a tenth embodiment of the frequency converter assembly of the present invention. It is a figure and is a front view which has a partial cross section.
  • various sensors are attached to the boundary of the case that houses the pressure vessel and the frequency converter. That is, various sensors such as a pressure sensor 90 and a temperature sensor 91 are attached to the boundary between the pressure vessel 1 and the base 12 of the case 2 for accommodating the frequency converter body 3, and the pressure sensor 90 and The signal of the temperature sensor 91 is guided to the frequency converter in the case 2 by the signal cables 92 and 93 without passing through an external cable, and various controls are performed.
  • the cables to be taken out of the case 2 are only the input side cable 16 and the output side cable 17 for input / output of the power supply, and the overall structure can be simplified. In addition, it is possible to prevent a disconnection trouble caused by a tension applied to a sensor cable.
  • FIG. 17A, FIG. 17B and FIG. 18 are views showing a first embodiment of the frequency converter assembly of the present invention.
  • FIG. 17A is a front view having a partial cross-section.
  • 17B is a cross-sectional view taken along the line XVI I-XV II of FIG. 17A
  • FIG. 18 is a front view showing a use state thereof.
  • the frequency converter assembly comprises a rectangular cylindrical pressure vessel 1 having a fluid suction port 1a and a discharge port 1b at both ends; 1 is composed of a case 2 fixed via a bracket 7, and the frequency converter body 3 is housed inside the case 2.
  • Case 2 At both ends of the pressure vessel 1, mounting flanges 4 and 5 are provided on the body. An opening 1 d is formed in a part of the pressure vessel 1, and a cooling fin 7 f which is a part of the bracket 7 is provided so as to protrude into the pressure vessel 1.
  • the bracket 7 is fixed to the pressure vessel 1, and the case 2 is fixed to the bracket 7 in close contact.
  • the configuration of Case 2 is the same as that of the first embodiment shown in FIGS. 1A and 1B. Case 2 has a cooling fin
  • the ket may be integrally molded.
  • the frequency converter can be cooled by the self-handled fluid of the fluid machine, a special cooling fan is not required separately.
  • a special cooling fan is not required separately.
  • it since it is cooled effectively by a plurality of cooling fins, it can be used even when the thermal conductivity of the handled fluid is as small as air.
  • FIGS. 17A and 17B connect the mounting flange 4 on the suction port 1a side of the pressure vessel 1 to the discharge port of the blower 90, and attach the mounting flange 5 on the discharge side 1b side of the pressure vessel 1 to the discharge side duct. 9 Connect to 1.
  • the other end of the input cable 16 is connected to the control panel 105, the other end of the output cable 17 is connected to the motor 104, and the power supplied from the control panel 1
  • the frequency is converted into a frequency, and the electric power whose frequency is converted is supplied to the motor 104, thereby controlling the rotation speed of the motor 104.
  • the blower 90 and the motor 104 are installed on a common base 102.
  • the motor 104 and the blower 90 are connected by a belt 92.
  • the air volume of the blower 90 can be adjusted by adjusting the number of rotations of the motor 104 by the frequency converter, so that the air volume adjustment damper is unnecessary, and the air volume can be adjusted by the damper adjustment. Also has a great energy saving effect.
  • FIG. 19 is a front view showing a 12th embodiment of the frequency converter assembly of the present invention.
  • the pressure vessel 1 is used for the outer casing of the vertical multi-stage pump 95.
  • the case 2 having the built-in frequency converter is mounted in close contact with the outer casing (pressure vessel 1) of the pump, and is cooled by the pump removing liquid via the bracket 7.
  • the suction pipe 96 and the discharge pipe 97 are connected to the outer casing (pressure vessel 1) of the pump.
  • the other end of the input side cable 16 is connected to the control panel 105
  • the other end of the output side cable 17 is connected to the motor 104
  • the power supplied from the control panel 105 is The motor 104 is guided to a frequency converter, and the frequency-converted power is supplied to the motor 104, thereby controlling the rotation speed of the motor 104.
  • the frequency converter is mounted on the pump, the pump can be designed exclusively for the frequency converter. For example, it is possible to reduce the size and weight by operating the pump at a frequency higher than that of a commercial power supply (50 Z 60 Hz).
  • the frequency converter can be easily installed near the pump without being affected by the usage environment around the pump.
  • an electric fan for air cooling which is required for a general inverter, is not required, and the reliability can be improved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A frequency converter assembly, which controls the number of revolutions of a hydraulic machine to control its performance. The frequency converter assembly comprises pressure vessel (1) provided with an inlet (1a) and an outlet (1b) through which fluid passes, and a frequency converter body (3) provided outside the pressure vessel (1).

Description

明 細 書 周波数変換器組立体 技術分野  Description Frequency converter assembly Technical field

本発明は、 ポンプ等の流体機械を性能調整するための周波数変換器に 係り、 特に、 圧力容器と周波数変換器とを一体化した周波数変換器組立 体に関するものである。 背景技術  The present invention relates to a frequency converter for adjusting the performance of a fluid machine such as a pump, and more particularly to a frequency converter assembly in which a pressure vessel and a frequency converter are integrated. Background art

イ ンバータ （周波数変換器） を使用し、 モータポンプの回転数を制御 する技術によ り給水装置のような激しい負荷変動を伴う用途のみでなく、 循環ポンプ等でも現地における必要最小限の流量 · 揚程 （真の要項） に ポンプの運転点を一致させて無駄のない効率的運転を行うことによ り省 エネルギーを達成できることが知られている。  The technology that uses an inverter (frequency converter) to control the number of revolutions of the motor pump makes it possible to use not only applications with severe load fluctuations such as water supply equipment but also circulating pumps, etc., with the minimum necessary flow rate on site. It is known that energy can be saved by matching the operating point of the pump to the head (the essential point) and performing efficient operation without waste.

図 2 0は、 インバ一タで運転される従来のモータポンプの構成を示す 図である。  FIG. 20 is a diagram showing a configuration of a conventional motor pump operated by an inverter.

図 2 0に示すように、 モータポンプ 1 0 1は共通べ一ス 1 0 2の上に ポンプ 1 0 3 とモータ 1 0 4 とを直結して設けた構成からなり、 制御盤 1 0 5内のイ ンバータ 1 0 6から給電されて運転される。 この運転に伴 つて、 吸込配管 1 0 7から吸い込まれ、 ポンプ 1 0 3から吐出された取 极液は、 逆止弁 1 0 8、 仕切弁 1 0 9および吐出配管 1 1 0を介して所 定の場所に圧送される。  As shown in FIG. 20, the motor pump 101 has a configuration in which the pump 103 and the motor 104 are directly connected on the common base 102, It is operated by being supplied with power from the inverter 106. During this operation, the suction liquid sucked in from the suction pipe 107 and discharged from the pump 103 flows through the check valve 108, the gate valve 109 and the discharge pipe 110. It is pumped to a fixed place.

しかしながら、 モータポンプを図 2 0に示すように一般のインバータ で運転する場合、 下記のような問題が生じると考えられる。 ① 現地でポンプの運転点を 「真の要項」 に合わせるよ うにポンプの 運転周波数を調整するには、 できるだけインバータをモ一タポンプに近 接させるのが望ましい。 しかし、 ポンプ周囲は、 湿気が多い場所である 可能性が高く 、 一般のイ ンバ一タ設置には不向きであるため、 イ ンバ一 タは通常、 図 2 0に示すように制御盤の中に納められている。 また、 ポ ンプと制御盤の距離が長い場合、 サージによるモータ絶縁破壊防止の為 の設備 （サージキラ一） 等が必要となる場合がある。 However, when the motor pump is operated by a general inverter as shown in Fig. 20, the following problems are considered to occur. (1) To adjust the operating frequency of the pump so that the operating point of the pump matches the “true requirements” on site, it is desirable to place the inverter as close to the motor pump as possible. However, the area around the pump is likely to be a humid place and is not suitable for general inverter installation, so the inverter is usually installed in the control panel as shown in Fig. 20. Has been placed. Also, if the distance between the pump and the control panel is long, equipment (surge killer) to prevent motor insulation breakdown due to surges may be required.

② 一般のインバータとモータポンプを組み合わせて、 例えばポンプ 吐出圧力一定制御や流量一定制御を行う場合には、 専用のコン ト ローラ が必要となり、 専門知識を有する者のみが自動可変速システムを構築し 使用している。  (2) When a general inverter and motor pump are combined to perform, for example, constant pump discharge pressure control or constant flow rate control, a dedicated controller is required, and only those with specialized knowledge can construct an automatic variable speed system. I'm using

③ 一般のイ ンバ一タは、 自己冷却用ファ ンを備えているため、 冷却 ファン焼損等による トラブルが懸念される。  ③ Since general inverters are equipped with self-cooling fans, there is a concern that troubles such as burning of cooling fans may occur.

④ 既設のモータポンプにインバータを使用する場合には、 前述の制 御盤の大幅な変更、 または新規制作が必要となる。 発明の開示  場合 When an inverter is used for an existing motor pump, a significant change in the control panel described above or new production is required. Disclosure of the invention

本発明は、 上記問題点に鑑み、 容易にポンプの性能調整を可能にする 周波数変換器 （インバータ） を、 ポンプ周りに使用する配管要素 （仕切 弁、 逆止弁等） の一種のように設置し、 イ ンバータ設備導入の簡素化を 図ることができる周波数変換器組立体を提供することを目的とする。 上述した目的を達成するために、 本発明は、 流体の吸込口と吐出口を 有する圧力容器と、 該圧力容器の外側に設けられる、 イ ンバ一タに代表 される周波数変換器とを備えたことを特徴とする。  In view of the above problems, the present invention provides a frequency converter (inverter) that can easily adjust the performance of a pump, as a kind of piping element (a gate valve, a check valve, etc.) used around the pump. It is another object of the present invention to provide a frequency converter assembly capable of simplifying the installation of inverter equipment. In order to achieve the above object, the present invention includes a pressure vessel having a fluid inlet and a fluid outlet, and a frequency converter typified by an inverter provided outside the pressure vessel. It is characterized by the following.

本発明によれば、 圧力容器の吸込口と吐出口を他の配管要素 （仕切弁、 逆止弁等） あるいはポンプと接続して、 周波数変換器をモータポンプに 近接させて設置でき、 しかも、 周波数変換器の発生熱は圧力容器内を流 れる流体へ効果的に放熱されるので、 一般のィンバータのような冷却フ アンが不要となり、 ィンバータの信頼性を向上させることができる。 また本発明の 1態様では、 前記周波数変換器を収容して外気から密封 するアルミ合金等の熱良導体からなるケースを設け、 該ケースを前記圧 力容器に密着して取り付けている。 これによ り、 周波数変換器をケース を介して外気と完全に遮断して、 周波数変換器がポンプ周辺の湿気ゃ屋 外における雨の影響を受けるのを防止し、 しかも、 周波数変換器を圧力 容器内を流れる流体でよ り効果的に冷却することができる。 According to the present invention, the suction port and the discharge port of the pressure vessel are connected to other piping elements (gate valve, Alternatively, the frequency converter can be installed close to the motor pump by connecting to a pump, and the heat generated by the frequency converter is effectively radiated to the fluid flowing through the pressure vessel. A cooling fan like a general inverter is not required, and the reliability of the inverter can be improved. In one embodiment of the present invention, a case made of a heat conductive conductor such as an aluminum alloy that accommodates the frequency converter and hermetically seals it from outside air is provided, and the case is attached to the pressure vessel in close contact. This completely shuts off the frequency converter from the outside air through the case, prevents the frequency converter from being affected by moisture around the pump and rain outside, The fluid flowing in the container can be cooled more effectively.

また本発明の 1態様では、 前記圧力容器とケースの一部を一体化する ようにしている。 これにより、 周波数変換器組立体と しての部品点数及 び組立工数を削減して、 生産性を向上させることができる。  In one embodiment of the present invention, the pressure vessel and a part of the case are integrated. As a result, the number of parts and the number of assembling steps as a frequency converter assembly can be reduced, and productivity can be improved.

また本発明の 1態様では、 前記圧力容器が仕切弁、 逆止弁、 圧力タン ク、 ス ト レーナの少なく とも 1つを兼ねるよ うにしている。 これによ り、 圧力容器のよ り有効利用を図って、 モータポンプを周波数変換器による 可変速運転する場合の施工性を向上させることができる。  In one embodiment of the present invention, the pressure vessel serves as at least one of a gate valve, a check valve, a pressure tank, and a strainer. This makes it possible to more effectively use the pressure vessel and improve workability when the motor pump is operated at a variable speed by the frequency converter.

また本発明の 1態様では、 前記圧力容器に圧力センサを取り付け、 ポ ンプと組み合わせてポンプ吐出し圧力制御を行うようにしている。 これ により、 吐出し圧力を一定にしたポンプの負荷変動に自動追従可能なポ ンプの自動可変制御システムを構築でき、 主に給水設備等に使用する場 合に有効である。  In one embodiment of the present invention, a pressure sensor is attached to the pressure vessel, and the pressure of the pump is controlled in combination with a pump. This makes it possible to construct an automatic variable pump control system that can automatically follow the load fluctuations of the pump with a constant discharge pressure, and is effective mainly when used for water supply equipment.

また本発明の 1態様では、 前記圧力容器に流量測定部を設け、 ポンプ と組み合わせてポンプ流量制御を行うようにしている。 これによ り、 設 備の経年変化に伴う配管抵抗の増加等に自動追従可能な流量を一定にし たポンプの自動可変制御システムを構築でき、 主に冷温水循環設備等に 使用する場合に有効である。 In one embodiment of the present invention, a flow rate measuring unit is provided in the pressure vessel, and a pump flow rate is controlled in combination with a pump. As a result, the flow rate that can automatically follow the increase in pipe resistance due to aging of the equipment is kept constant. It is possible to construct an automatic variable control system for pumps, which is effective mainly for use in cold water and hot water circulation equipment.

また本発明の 1態様では、 前記圧力容器と周波数変換器を納めるケ一 スとの境界部に各種センサ類を配している。 これにより、 センサ類の信 号を外部ケーブルを通すことなく内部の信号ケーブルによって周波数変 換器へと導く ことができ、 全体の構成の簡素化を図るとともに、 センサ 類のケ一ブルに張力が加わってこれが断線する トラブルを回避できる。 図面の簡単な説明  In one embodiment of the present invention, various sensors are arranged at a boundary between the pressure vessel and a case accommodating the frequency converter. As a result, the signals of the sensors can be guided to the frequency converter by the internal signal cable without passing through the external cable, thereby simplifying the overall configuration and increasing the tension on the cables of the sensors. In addition, the disconnection can avoid trouble. BRIEF DESCRIPTION OF THE FIGURES

図 1 Aおよび図 1 Bは本発明に係る周波数変換器組立体の第 1の実施 の形態を示し、 図 1 Aは正面図、 図 1 Bは図 1 Aの I 一 I線断面図であ る。  1A and 1B show a first embodiment of a frequency converter assembly according to the present invention, FIG. 1A is a front view, and FIG. 1B is a cross-sectional view taken along line I-I of FIG. 1A. You.

図 2は図 1 に示す周波数変換器組立体の使用例を示す正面図である。 図 3 Aおよび図 3 Bは本発明に係る周波数変換器組立体の第 2の実施 の形態を示し、 図 3 Aは正面図、 図 3 Bは図 3 Aの I I I— I I I線断面図で ある。  FIG. 2 is a front view showing an example of use of the frequency converter assembly shown in FIG. 3A and 3B show a second embodiment of the frequency converter assembly according to the present invention. FIG. 3A is a front view, and FIG. 3B is a sectional view taken along line III-III of FIG. 3A. .

図 4 Aおよび図 4 Bは本発明に係る周波数変換器組立体の第 3の実施 の形態を示し、 図 4 Aは正面図、 図 4 Bは図 4 Aの I V— IV線断面図であ る。  4A and 4B show a third embodiment of the frequency converter assembly according to the present invention. FIG. 4A is a front view, and FIG. 4B is a sectional view taken along line IV-IV of FIG. 4A. You.

図 5 Aおよび図 5 Bは本発明に係る周波数変換器組立体の第 4の実施 の形態を示し、 図 5 Aは正面図、 図 5 Bは図 5 Aの V— V線断面図であ る。  5A and 5B show a fourth embodiment of the frequency converter assembly according to the present invention. FIG. 5A is a front view, and FIG. 5B is a sectional view taken along line VV of FIG. 5A. You.

図 6 Aおよび図 6 Bは本発明に係る周波数変換器組立体の第 5の実施 の形態を示し、 図 6 Aは正面図、 図 6 Bは側面図である。  6A and 6B show a fifth embodiment of the frequency converter assembly according to the present invention. FIG. 6A is a front view, and FIG. 6B is a side view.

図 7は図 6に示す周波数変換器組立体の使用例を示す正面図である。 図 8 Aおよび図 8 Bは本発明に係る周波数変換器組立体の第 6の実施 の形態を示し、 図 8 Aは正面図、 図 8 Bは逆止弁部の断面図である。 図 9は図 8に示す周波数変換器組立体の使用例を示す正面図である。 図 1 0は本発明に係る周波数変換器組立体の第 7の実施の形態を示す 図であり、 部分断面を有する正面図である。 FIG. 7 is a front view showing an example of use of the frequency converter assembly shown in FIG. 8A and 8B show a sixth embodiment of the frequency converter assembly according to the present invention. FIG. 8A is a front view, and FIG. 8B is a cross-sectional view of a check valve portion. FIG. 9 is a front view showing an example of use of the frequency converter assembly shown in FIG. FIG. 10 is a diagram showing a seventh embodiment of the frequency converter assembly according to the present invention, and is a front view having a partial cross section.

図 1 1は図 1 0に示す周波数変換器組立体の使用例を示す正面図であ る。  FIG. 11 is a front view showing an example of use of the frequency converter assembly shown in FIG.

図 1 2は本発明に係る周波数変換器組立体の第 8の実施の形態を示す 図であり、 部分断面を有する正面図である。  FIG. 12 is a view showing an eighth embodiment of the frequency converter assembly according to the present invention, and is a front view having a partial cross section.

図 1 3は図 1 2に示す周波数変換器組立体の使用例を示す正面図であ る。  FIG. 13 is a front view showing an example of use of the frequency converter assembly shown in FIG.

図 1 4は本発明に係る周波数変換器組立体の第 9の実施の形態を示す 図であり、 部分断面を有する正面図である。  FIG. 14 is a diagram showing a ninth embodiment of the frequency converter assembly according to the present invention, and is a front view having a partial cross section.

図 1 5は図 1 4に示す周波数変換器組立体の使用例を示す正面図であ る。  FIG. 15 is a front view showing an example of use of the frequency converter assembly shown in FIG.

図 1 6は本発明に係る周波数変換器組立体の第 1 0の実施の形態を示 す図であり、 部分断面を有する正面図である。  FIG. 16 is a diagram showing a tenth embodiment of the frequency converter assembly according to the present invention, and is a front view having a partial cross section.

図 1 7 Aおよび図 1 7 Bは本発明に係る周波数変換器組立体の第 1 1 の実施の形態を示す図であり、 図 1 7 Aは部分断面を有する正面図、 図 1 7 Bは図 1 7 Aの XVI I— XVI I線断面図である。  FIGS. 17A and 17B are views showing a first embodiment of the frequency converter assembly according to the present invention, FIG. 17A is a front view having a partial cross section, and FIG. FIG. 17 is a sectional view taken along the line XVI I—XVI I of FIG. 17A.

図 1 8は図 1 7に示す周波数変換器組立体の使用例を示す正面図であ る。  FIG. 18 is a front view showing an example of use of the frequency converter assembly shown in FIG.

図 1 9は本発明に係る周波数変換器組立体の第 1 2の実施の形態を示 す正面図である。  FIG. 19 is a front view showing a 12th embodiment of the frequency converter assembly according to the present invention.

図 2 0は従来例を示す正面図である。 発明を実施するための最良の形態 FIG. 20 is a front view showing a conventional example. BEST MODE FOR CARRYING OUT THE INVENTION

以下、 本発明に係る周波数変換器組立体の実施の形態を図面を参照し て説明する。  Hereinafter, embodiments of a frequency converter assembly according to the present invention will be described with reference to the drawings.

図 1 A， 図 I B及び図 2は、 本発明の周波数変換器組立体の第 1 の実 施の形態を示す図であり、 図 1 Aは正面図、 図 1 Bは図 1 Aの I 一 I線 断面図、 図 2はその使用状態を示す正面図である。 図 1 Aおよび図 1 B に示すよ うに、 周波数変換器組立体は、 両端に液体の吸込口 1 a と吐出 口 1 b とを有する略円筒状の圧力容器 1 と、 この圧力容器 1の外側面に 固着されたケース 2 とから主に構成され、 このケース 2の内部に周波数 変換器本体 3が収納されている。  FIGS. 1A, IB, and 2 are diagrams showing a first embodiment of the frequency converter assembly of the present invention. FIG. 1A is a front view, and FIG. FIG. 2 is a front view showing the state of use of the device. As shown in FIGS. 1A and 1B, the frequency converter assembly includes a substantially cylindrical pressure vessel 1 having a liquid suction port 1 a and a liquid discharge port 1 b at both ends, and a pressure vessel 1 outside the pressure vessel 1. It mainly comprises a case 2 fixed to the side surface, and the frequency converter body 3 is housed inside the case 2.

前記圧力容器 1の両端の外周面には取付フランジ 4 , 5力；、 外側面に は複数のリブ 6で補強された平板状のブラケッ ト 7がそれぞれ一体に設 けられている。 前記取付フランジ 4， 5には、 圧力容器 1 の内外を連通 する圧力測定孔 8， 9が穿設され、 この圧力測定孔 8 , 9は、 プラグ 1 0， 1 1で塞がれている。 一方、 前記ケース 2は、 例えば熱伝導性の良 好なアルミ合金から構成されたべ一ス 1 2 とカバー 1 3 とからなり、 両 者の当接面にシール部材 1 4を介在させてボルトで締結することで、 外 気との気密が保たれている。  Mounting flanges 4 and 5 are provided on the outer peripheral surfaces of both ends of the pressure vessel 1, and flat plate-shaped brackets 7 reinforced with a plurality of ribs 6 are integrally provided on the outer surface. The mounting flanges 4 and 5 are provided with pressure measuring holes 8 and 9 communicating the inside and the outside of the pressure vessel 1, and the pressure measuring holes 8 and 9 are closed by plugs 10 and 11. On the other hand, the case 2 is composed of a base 12 and a cover 13 made of, for example, an aluminum alloy having good heat conductivity, and is bolted with a sealing member 14 interposed between the contact surfaces of the two. By concluding, airtightness with the outside air is maintained.

前記カバー 1 3の上面には開口が設けられ、 この開口はねじ止め式キ ヤップ 1 5で気密的に閉塞されている。 このキャンプ 1 5内には、 例え ば、 口一タリー式の段階式スィ ッチで構成されて、 流体機械の回転数を 適宜に調節できるよ うにした出力周波数調整手段が設けられている。 前記周波数変換器本体 3は前記ベース 1 2に密着性良く 固定され、 そ の発生熱をべ一ス 1 2に伝える。 同様に、 ベ一ス 1 2は、 そのほぼ全面 に亘つて前記ブラケッ ト 7の表面に密着させた状態でボルト等の締結具 によって該ブラケッ ト 7に固定されている。 これにより、 周波数変換器 本体 3で発生した熱は、 ベース 1 2から圧力容器 1 に効率よく伝達され、 圧力容器 1内を流れる取极流体に好適に放熱される。 このため、 一般の ィンバータに用いられる空冷ファンなどは不要となり、 ファン故障によ る冷却不良の心配がない。 An opening is provided on the upper surface of the cover 13, and the opening is hermetically closed by a screw cap 15. The camp 15 is provided with, for example, an output frequency adjusting means which is constituted by a step switch of a tally type so that the rotation speed of the fluid machine can be appropriately adjusted. The frequency converter body 3 is fixed to the base 12 with good adhesion, and transmits the generated heat to the base 12. Similarly, base 1 2 is almost entirely The bracket 7 is fixed to the bracket 7 by fasteners such as bolts in a state where the bracket 7 is in close contact with the surface of the bracket 7. Thereby, the heat generated in the frequency converter main body 3 is efficiently transmitted from the base 12 to the pressure vessel 1, and is appropriately radiated to the intake fluid flowing in the pressure vessel 1. This eliminates the need for an air-cooling fan used in general inverters, and there is no fear of cooling failure due to fan failure.

また、 前記ベース 1 2には、 電力の周波数変換器への入力手段と して の入力側ケーブル 1 6 と、 周波数変換器で周波数が変換された電力の出 力手段と しての出力側ケーブル 1 7の一端が接続されている。 この入力 側ケ一ブル 1 6及び出力側ケーブル 1 7には、 芯線と絶縁体、 及び絶縁 体とケーブル被覆材との間から空気が行き来できないよ うに、 気密処理 を施した水中ケーブルが使用されている。  Also, the base 12 has an input cable 16 as an input means of the power to the frequency converter, and an output cable as an output means of the power whose frequency has been converted by the frequency converter. One end of 17 is connected. For the input side cable 16 and the output side cable 17, an airtight underwater cable is used to prevent air from flowing between the core wire and the insulator, and between the insulator and the cable covering material. ing.

このよ うに入 · 出力手段と して水中ケーブルを使用し、 しかも前述の ように、 ケース 2を密封することで、 このケース 2内に収容した周波数 変換器本体 3を外気と完全に遮断して、 内部結露を防止するとともに、 周波数変換器本体 3がポンプ周辺の湿気や屋外における雨の影響を受け ないよ うになっている。  In this way, the underwater cable is used as the input and output means, and as described above, the case 2 is sealed, so that the frequency converter body 3 housed in the case 2 is completely shut off from the outside air. In addition to preventing internal dew condensation, the frequency converter body 3 is not affected by moisture around the pump or rain outside.

次に、 この周波数変換器組立体の使用例を図 2を参照して説明する。 先ず、 圧力容器 1の吸込口 1 a側の取付フランジ 4を吸込配管 1 0 7の フランジ 1 1 1に接続し、 圧力容器 1の吐出口 1 b側の取付フランジ 5 をポンプ 1 0 3の吸込み側フランジ 1 1 2に接続する。 これにより、 モ ータ 1 0 4の回転に伴うポンプ 1 0 3の運転によって、 取扱液が吸込配 管 1 0 7から圧力容器 1内を通過してポンプ 1 0 3内に吸い込まれ、 逆 止弁 1 0 8、 仕切弁 1 0 9および吐出配管 1 1 0を介して所定の場所に 圧送されるようにする。 また、 入力側ケーブル 1 6の他端を制御盤 1 0 5に接続し、 出力側ケ 一ブル 1 Ίの他端をモータ 1 0 4に接続し、 制御盤 1 0 5から供給され る電力を周波数変換器に導き、 これにより周波数が変換された電力をモ ータ 1 0 4に供給することで、 モ一タ 1 0 4の回転数を制御する。 Next, an example of use of the frequency converter assembly will be described with reference to FIG. First, connect the mounting flange 4 on the suction port 1 a side of the pressure vessel 1 to the flange 1 1 1 of the suction pipe 1 07, and attach the mounting flange 5 on the discharge port 1 b side of the pressure vessel 1 to the pump 103. Connect to side flange 1 1 2. As a result, with the operation of the pump 103 accompanying the rotation of the motor 104, the liquid to be handled is drawn from the suction piping 107 through the pressure vessel 1 into the pump 103, and is checked. Pressure is fed to a predetermined place via the valve 108, the gate valve 109, and the discharge pipe 110. The other end of the input cable 16 is connected to the control panel 105, the other end of the output cable 1 出力 is connected to the motor 104, and the power supplied from the control panel 105 is The motor is guided to a frequency converter, and the frequency-converted power is supplied to the motor 104, thereby controlling the rotation speed of the motor 104.

本実施形態によれば、 圧力容器 1 を介して周波数変換器をモータボン プ 1 0 1に近接させて設置でき、 しかも、 周波数変換器の発生熱は圧力 容器 1内の流体へ効果的に放熱される。 そして、 周波数変換器をケース 2を介して外気と完全に遮断して、 周波数変換器がポンプ周辺の湿気や 屋外における雨の影響を受けるのを防止することができる。  According to the present embodiment, the frequency converter can be installed close to the motor pump 101 via the pressure vessel 1, and the generated heat of the frequency converter is effectively radiated to the fluid in the pressure vessel 1. You. Then, the frequency converter can be completely shut off from the outside air via the case 2 to prevent the frequency converter from being affected by moisture around the pump or rain outside.

図 3 Aおよび図 3 Bは、 本発明の周波数変換器組立体の第 2の実施の 態様を示す図であり、 図 3 Aは部分断面を有する正面図、 図 3 Bは図 3 Aの Π Ι— Ι Ι Ι線断面図である。 本実施形態は、 第 1の実施の形態におけ る取付フランジ 4， 5の代わりに、 圧力容器 1 の吸込口 l a及び吐出口 1 bの内周面に接続用の雌ねじ部 2 0 , 2 1 を設け、 この雌ねじ部 2 0， 2 1 を介して圧力容器 1 の一端を吸込配管に、 他端をポンプにそれぞれ 接続するようにしたものである。  3A and 3B are views showing a second embodiment of the frequency converter assembly of the present invention, wherein FIG. 3A is a front view having a partial cross section, and FIG. FIG. 4 is a sectional view taken along line Ι- Ι Ι. In this embodiment, instead of the mounting flanges 4 and 5 in the first embodiment, female threads 20 and 21 for connection are provided on the inner peripheral surfaces of the suction port la and the discharge port 1 b of the pressure vessel 1. And one end of the pressure vessel 1 is connected to the suction pipe and the other end is connected to the pump via the internal thread portions 20 and 21.

図 4 Aおよび図 4 Bは、 本発明の周波数変換器組立体の第 3の実施の 形態を示す図であり、 図 4 Aは正面図、 図 4 Bは図 4 Aの IV— I V線断面 図である。 本実施形態は、 圧力容器 1 の外側面に上方に開口 したカップ 状のブラケッ ト 3 0を一体に形成し、 このブラケッ ト 3 0の開口端にシ 一ル部材 1 4を介在させつつカバー 1 3を固定することで、 ブラケッ ト 3 0 とカバ一 1 3 との間で周波数変換器本体 3を密封するケース 2を構 成するよ うにしたものである。 他の構成は、 図 1 Aおよび図 1 Bに示す 第 1の実施の形態と同様である。  4A and 4B are views showing a third embodiment of the frequency converter assembly according to the present invention. FIG. 4A is a front view, and FIG. 4B is a cross section taken along line IV-IV of FIG. 4A. FIG. In the present embodiment, a cup-shaped bracket 30 that is opened upward is integrally formed on the outer surface of the pressure vessel 1, and a cover member 14 is interposed between the open end of the bracket 30 and a sealing member 14. By fixing 3, a case 2 that seals the frequency converter body 3 between the bracket 30 and the cover 13 is configured. Other configurations are the same as those of the first embodiment shown in FIGS. 1A and 1B.

このよ う に、 圧力容器 1 と周波数変換器本体 3を収容するケース 2の 一部を一体化 （同一成形品） にすることにより、 周波数変換器組立体の 組立工数、 部品点数を削減して生産性の向上を図ることができる。 Thus, the case 2 for accommodating the pressure vessel 1 and the frequency converter body 3 By integrating some parts (the same molded product), the number of assembly steps and the number of parts of the frequency converter assembly can be reduced, and the productivity can be improved.

図 5 Aおよび図 5 Bは、 本発明の周波数変換器組立体の第 4の実施の 形態を示す図であり、 図 5 Aは部分断面を有する正面図、 図 5 Bは図 5 Aの V— V線断面図である。 本実施形態は、 図 4 Aおよび図 4 Bに示す 第 3の実施の形態と同様に、 圧力容器 1の外側面にケース 2の一部を構 成するブラケッ ト 3 0を一体に形成したものである。 そして、 第 3の実 施の形態における取付フランジ 4， 5の代わり に、 圧力容器 1の吸込口 1 a及び吐出口 1 bの内周面に接続用の雌ねじ部 2 0 , 2 1 を設け、 こ の雌ねじ 2 0 , 2 1 を介して圧力容器 1 の一端を吸込配管に、 他端をポ ンプにそれぞれ接続するよ うにしたものである。 他の構成は、 図 4 Aお よび図 4 Bに示す第 3の実施の形態と同様である。  5A and 5B are views showing a fourth embodiment of the frequency converter assembly of the present invention, FIG. 5A is a front view having a partial cross section, and FIG. -It is a V line sectional view. In this embodiment, similarly to the third embodiment shown in FIGS. 4A and 4B, a bracket 30 that forms a part of the case 2 is integrally formed on the outer surface of the pressure vessel 1. It is. Then, instead of the mounting flanges 4 and 5 in the third embodiment, female threads 20 and 21 for connection are provided on the inner peripheral surfaces of the suction port 1 a and the discharge port 1 b of the pressure vessel 1. One end of the pressure vessel 1 is connected to the suction pipe and the other end is connected to the pump via the internal threads 20 and 21. Other configurations are the same as those of the third embodiment shown in FIGS. 4A and 4B.

図 6 A , 図 6 B及び図 7は、 本発明の周波数変換器組立体の第 5の実 施の形態を示す図であり、 図 6 Aは正面図、 図 6 Bは側面図、 図 7はそ の使用状態を示す正面図である。 図 6 Aおよび図 6 Bに示す実施の形態 においては、 仕切弁 4 0に周波数変換器組立体を一体化したものであり、 弁体を内蔵した弁本体 4 1 を圧力容器と して使用し、 この弁本体 （圧力 容器） 4 1 にブラケッ ト 7を一体に形成し、 このブラケッ ト 7の内部に 周波数変換器本体を収納したベース 1 2 とカバ一 1 3 とからなるケース 2を固定したものである。 そして、 図 7に示すように、 この仕切弁 4 0 を配管要素の一部と して吸込配管 1 0 7 とポンプ 1 0 3の吸込側の間に 設置して使用する。  FIGS. 6A, 6B and 7 are diagrams showing a fifth embodiment of the frequency converter assembly of the present invention. FIG. 6A is a front view, FIG. 6B is a side view, and FIG. Is a front view showing the state of use. In the embodiment shown in FIGS. 6A and 6B, the frequency converter assembly is integrated with the gate valve 40, and the valve body 41 with the built-in valve body is used as a pressure vessel. A bracket 7 was formed integrally with the valve body (pressure vessel) 4 1, and a case 2 consisting of a base 12 containing the frequency converter body and a cover 13 was fixed inside the bracket 7. Things. Then, as shown in FIG. 7, this gate valve 40 is used as a part of a piping element by being installed between the suction pipe 107 and the suction side of the pump 103.

図 6 A， 図 6 Bおよび図 7に示す実施の形態にあっては、 ポンプ周り に使用される仕切弁 4 0の弁本体 4 1 を圧力容器と して使用することに より、 モータポンプ 1 0 1 をィンバ一タによる可変速運転にする場合の 施工性の向上を図ることができる。 すなわち、 従来の一般的な仕切弁の 代わりに、 この弁本体 4 1を周波数変換器組立体の圧力容器と して使用 した仕切弁 4 0を配管の一部に取り付けるだけで、 容易にィンバータの 設置が可能となる。 これは、 既設のモータポンプにインバ一タを導入す る場合に、 既設の配管要素の一部を交換するだけでよいので、 配管を変 更する必要がなく なり大きなメ リ ッ トとなる。 In the embodiment shown in FIGS. 6A, 6B and 7, the motor pump 1 is provided by using the valve body 41 of the gate valve 40 used around the pump as a pressure vessel. 0 1 for variable speed operation by inverter Workability can be improved. That is, instead of the conventional general gate valve, the gate body 41 is used as the pressure vessel of the frequency converter assembly. Installation becomes possible. This is a great advantage because, when introducing an inverter to an existing motor pump, it is only necessary to replace a part of the existing piping elements, and there is no need to change the piping.

図 8 A , 図 8 B及び図 9は、 本発明の周波数変換器組立体の第 6の実 施の形態を示す図であり、 図 8 Aは正面図、 図 8 Bは要部断面図、 図 9 はその使用状態を示す正面図である。 図 8 Aおよび図 8 Bに示す実施の 形態は、 逆止弁 5 0に周波数変換器組立体を一体化したものである。 即 ち、 弁体 5 1及び弁シ一 ト 5 2を内蔵した弁本体 5 3を圧力容器と して 使用し、 この弁本体 （圧力容器） 5 3に図 6 Aおよび図 6 Bに示す例と 同様なブラケッ ト （図示せず） を一体に形成し、 このブラケッ トに内部 に周波数変換器本体を収納したベース 1 2 とカバ一 1 3 とかなるケース 2を固定したものである。 そして、 図 9に示すよ うに、 この逆止弁 5 0 を配管要素の一部と してポンプ 1 0 3の吐出側と仕切弁 1 0 9の間に設 置して使用する。 8A, 8B and 9 are views showing a sixth embodiment of the frequency converter assembly of the present invention, FIG. 8A is a front view, FIG. FIG. 9 is a front view showing the state of use. In the embodiment shown in FIGS. 8A and 8B, a check valve 50 is integrated with a frequency converter assembly. In other words, the valve body 53 incorporating the valve body 51 and the valve sheet 52 is used as a pressure vessel, and the valve body (pressure vessel) 53 has the example shown in FIGS. 6A and 6B. A bracket (not shown) similar to the above is integrally formed, and a base 2 containing a frequency converter main body and a case 2 consisting of a cover 13 are fixed to the bracket. Then, as shown in FIG. 9, the check valve 50 is used as a part of a piping element by being provided between the discharge side of the pump 103 and the gate valve 109.

図 8 A， 図 8 Bおよび図 9に示す実施の形態にあっては、 逆止弁 5 0 の弁体 5 1 の開閉をリ一 ドスイ ッチ等で O N Z〇 F Fの信号と して取り 出すリ一ドスィ ツチ信号線 5 4が設けられ、 この信号を周波数変換器に 取り込んで制御するよ う構成されている。 これにより、 ポンプ保護機能 を付加することができる。 例えば、 周波数変換器に電源が投入された状 態で、 逆止弁閉の信号が出力された場合には、 ポンプの締切り運転と し て検知しポンプを停止することで、 異常発熱によるポンプ内部の焼き付 け等を防止する。 ポンプ設備において、 実揚程が高い場合は、 ポンプの 性能調整で回転数を下げすぎると締切り運転となることがあるが、 この ように構成することでポンプが保護され、 よ り確実に性能調整による省 エネルギー化を図ることができる。 In the embodiment shown in FIGS. 8A, 8B, and 9, the opening and closing of the valve element 51 of the check valve 50 is taken out as a signal of ONZ〇FF by a lead switch or the like. A read switch signal line 54 is provided, and this signal is taken in a frequency converter and controlled. Thereby, a pump protection function can be added. For example, if the frequency converter is powered on and a check valve close signal is output, it is detected as shutoff operation of the pump and the pump is stopped. Prevent burn-in. If the actual head is high in the pump equipment, If the number of revolutions is lowered too much during performance adjustment, a shut-off operation may occur. However, this configuration protects the pump, and can more reliably save energy by performance adjustment.

図 1 0及び図 1 1は、 本発明の周波数変換器組立体の第 7の実施の形 態を示す図であり、 図 1 0は部分断面を有する正面図、 図 1 1はその使 用状態を示す正面図である。 図 1 0に示す実施の形態は、 ス ト レーナ 6 1 に周波数変換器組立体を一体化したものである。 即ち、 フィルタ 6 0 を内蔵したス トレーナ本体 6 2を圧力容器と して使用し、 このス ト レ一 ナ本体 （圧力容器） 6 2にブラケッ ト 7を一体に形成して、 このブラケ ッ ト 7に内部に周波数変換器本体を収納したべ一ス 1 2 とカバー 1 3 と かなるケース 2を固定したものである。 そして、 図 1 1 に示すように、 このス ト レーナ 6 1 を配管要素の一部と して吸込配管 1 0 7 とポンプ 1 0 3の吸込側の間に設置して使用する。  FIGS. 10 and 11 are views showing a seventh embodiment of the frequency converter assembly of the present invention. FIG. 10 is a front view having a partial cross section, and FIG. FIG. In the embodiment shown in FIG. 10, a frequency converter assembly is integrated with a strainer 61. That is, the strainer main body 62 containing the filter 60 is used as a pressure vessel, and the bracket 7 is integrally formed with the strainer main body (pressure vessel) 62. In Fig. 7, a base 2 containing the frequency converter body and a case 2 consisting of a cover 13 are fixed. Then, as shown in FIG. 11, the strainer 61 is used as a part of a piping element by being installed between the suction pipe 107 and the suction side of the pump 103.

図 1 0および図 1 1に示す実施の形態にあっては、 ス ト レ一ナ 6 1の 下流側に位置する取付フランジ 6 3に圧力測定孔 6 4を設け、 この圧力 測定孔 6 4に圧力センサ 6 5を取り付け、 この圧力信号を信号ケ一ブル 6 6からィンバータへ取り込んで制御するよ う構成されている。 これに より、 ポンプ保護機能を付加することができる。 例えば、 図 1 0に示す ス ト レーナ 6 1 をポンプの吸込み側に設置して、 ある設定圧力以下にな るとポンプを停止させるようにすることで、 ス トレーナ 6 1のフィルタ 6 0の詰ま りや吸込側仕切弁の開け忘れなどの吸込圧力異常低下による ポンプ損傷を防止することができる。  In the embodiment shown in FIG. 10 and FIG. 11, a pressure measuring hole 64 is provided in the mounting flange 63 located downstream of the strainer 61, and the pressure measuring hole 64 is provided in the mounting flange 63. A pressure sensor 65 is mounted, and the pressure signal is taken from the signal cable 66 to the inverter and controlled. Thereby, a pump protection function can be added. For example, by installing the strainer 61 shown in Fig. 10 on the suction side of the pump and stopping the pump when the pressure drops below a certain set pressure, the filter 60 of the strainer 61 is clogged. The pump can be prevented from being damaged due to abnormally low suction pressure, for example, when the suction side gate valve is forgotten to be opened.

図 1 2及び図 1 3は、 本発明の周波数変換器組立体の第 8の実施の形 態を示す図であり、 図 1 2は部分断面を有する正面図、 図 1 3はその使 用状態を示す正面図である。 図 1 2に示す実施の形態は、 圧力容器に圧 力センサを取り付け、 圧力信号を周波数変換器の内部に取り込むように したものである。 即ち、 圧力容器 1の一方の取付フランジ 5に設けた圧 力測定孔 9に圧力センサ 7 0を取付け、 この圧力センサ 7 0で検知され た圧力信号を信号ケーブル 7 1 を介してィンバ一タ内部へ取り込んでポ ンプ吐出し圧力制御を行う よ うに構成したものである。 他の構成は図 1 Aおよび図 1 Bに示す第 1の実施の形態と同様である。 そして、 図 1 3 に示すように、 この圧力容器 1 を配管の一部と してポンプ 1 0 3の吐出 側と仕切弁 1 0 9の間に設置して使用する。 FIGS. 12 and 13 are views showing an eighth embodiment of the frequency converter assembly of the present invention. FIG. 12 is a front view having a partial cross section, and FIG. 13 is a use state thereof. FIG. The embodiment shown in FIG. It is equipped with a force sensor to take the pressure signal into the frequency converter. That is, a pressure sensor 70 is attached to a pressure measurement hole 9 provided in one of the mounting flanges 5 of the pressure vessel 1, and a pressure signal detected by the pressure sensor 70 is sent to the inside of the inverter via a signal cable 71. To control the pump discharge pressure. Other configurations are the same as those of the first embodiment shown in FIGS. 1A and 1B. Then, as shown in FIG. 13, this pressure vessel 1 is used as a part of a pipe between the discharge side of the pump 103 and the gate valve 109.

このように、 圧力信号を利用してィンバータ内部の制御ソフ トをボン プの自動可変速制御で一般的な吐出圧力一定制御、 推定末端圧一定制御 を行う制御用等と して本発明の周波数変換器組立体を使用することによ り、 ユーザーは、 特別な専門知識を有さずともポンプの自動可変速制御 システムを構築し活用することができる。 この実施の形態の周波数変換 器組立体を主に給水設備等に使用することで、 ポンプの負荷変動に自動 追従可能となり有効な省エネルギー手段となる。  As described above, the control software inside the inverter using the pressure signal is used for controlling the general discharge pressure constant control and the estimated terminal pressure constant control by the automatic variable speed control of the pump. The use of a transducer assembly allows the user to build and utilize an automatic variable speed control system for the pump without special expertise. By using the frequency converter assembly of this embodiment mainly for water supply equipment, etc., it is possible to automatically follow the load fluctuation of the pump, and it becomes an effective energy saving means.

ここで、 吐出圧力一定制御とは、 主にインバータ制御によりポンプの 回転速度を変えて、 ポンプの性能を変化させ、 どのような流量において も吐出圧力を一定にするものである。 すなわち、 ポンプの吐出圧力を検 知して、 目標値と比較演算しその結果をィンバータ制御によ り回転速度 を増減させ、 吐出圧力を一定に保持している。  Here, the constant discharge pressure control is to change the pump speed mainly by inverter control to change the performance of the pump and to keep the discharge pressure constant at any flow rate. In other words, the discharge pressure of the pump is detected, the result is compared with a target value, the result is increased or decreased by inverter control, and the discharge pressure is kept constant.

また、 推定末端圧一定制御とは、 吐出圧力一定制御方式が最大水量時 の必要圧力でポンプ吐出圧力を一定にするよう制御しているのに対し、 推定末端圧力一定線に沿って制御する方式のことである。 即ち、 使用水 量が少ない程ポンプの吐出圧が小さくなるようにすることで、 吐出圧力 一定制御方式に比べて末端での圧力変動が少なく、 かつ消費電力を軽减 できる方式である。 In addition, the constant control of estimated end pressure is a method of controlling along the constant estimated end pressure line, while the constant discharge pressure control method controls the pump discharge pressure to be constant at the required pressure at the maximum water volume. That is. That is, by making the discharge pressure of the pump smaller as the amount of water used is smaller, the pressure fluctuation at the end is smaller and the power consumption is reduced as compared with the discharge pressure constant control method. It is a method that can be done.

図 1 4及び図 1 5は、 本発明の周波数変換器組立体の第 9の実施の形 態を示す図であり、 図 1 4は部分断面を有する正面図、 図 1 5はその使 用状態を示す正面図である。 図 1 4に示す実施の形態は、 圧力容器に流 量測定部を設けると ともに圧力センサを取り付けたものである。 即ち、 圧力容器 1 の内部に、 例えばォリ フィ スからなる流量測定部 8 0を設け、 圧力容器 1の取付フランジ 4 , 5に設けられた圧力測定孔 8 , 9に吸込 側圧力センサ 8 1 と吐出し側圧力センサ 8 2をそれぞれ取付けて、 これ らの圧力センサ 8 1 , 8 2で検知された圧力信号を信号ケ一ブル 8 3 , 8 4を介してインバータ内部へ取り込んでポンプ流量制御を行うよ うに 構成したものである。 他の構成は図 1 Aおよび図 1 Bに示す第 1の実施 の形態と同様である。 そして、 図 1 5に示すよ うに、 この圧力容器 1 を 配管の一部と してポンプ 1 0 3の吐出側と逆止弁 1 0 8の間に設置して 使用する。  FIGS. 14 and 15 are views showing a ninth embodiment of the frequency converter assembly of the present invention. FIG. 14 is a front view having a partial cross section, and FIG. FIG. In the embodiment shown in FIG. 14, a pressure vessel is provided with a flow measuring unit and a pressure sensor is attached. That is, a flow rate measuring section 80 made up of, for example, an orifice is provided inside the pressure vessel 1, and the suction side pressure sensor 81 And discharge side pressure sensors 82, respectively, and the pressure signals detected by these pressure sensors 81, 82 are taken into the inverter via signal cables 83, 84 to control the pump flow rate. It is configured to perform Other configurations are the same as those of the first embodiment shown in FIGS. 1A and 1B. Then, as shown in FIG. 15, the pressure vessel 1 is used as a part of a pipe between the discharge side of the pump 103 and the check valve 108.

本実施形態によれば、 前記圧力信号をィンバータ内部にて流量に換算 し、 流量一定制御を行う制御用の制御ソフ トを搭載することで、 ユーザ 一は、 特別な専門知識を有さずともポンプの自動可変速制御システムを 構築し活用することができる。 この実施の形態にあっては、 主に冷温水 循環設備等に使用することで設備の経年変化に伴う配管抵抗の増加に自 動追従可能となり有効な省エネルギー手段となる。  According to the present embodiment, by converting the pressure signal into a flow rate inside the inverter and installing a control software for control for performing a constant flow rate control, the user can have no special expertise. An automatic variable speed control system for the pump can be constructed and used. In this embodiment, when used mainly for cold / hot water circulation equipment, it is possible to automatically follow an increase in pipe resistance due to aging of the equipment, and this is an effective energy saving means.

ここで、 流量一定制御とは、 ポンプの水量 （流量） を例えば流量セン サによって検知して目標値と比較演算し、 その結果に基づき、 イ ンバー タ等によってポンプの回転速度を増減させ、 水量を一定に保持するもの である。  Here, the constant flow control means that the flow rate (flow rate) of the pump is detected by, for example, a flow rate sensor and compared with a target value. Is kept constant.

図 1 6は、 本発明の周波数変換器組立体の第 1 0の実施の形態を示す 図であり、 部分断面を有する正面図である。 本実施形態は、 圧力容器と 周波数変換器を納めるケースの境界部に各種センサを取り付けるように したものである。 即ち、 圧力容器 1 と周波数変換器本体 3を納めるケ一 ス 2のべ一ス 1 2 との境界部に、 圧力センサ 9 0、 温度センサ 9 1等の 各種センサを取り付け、 圧力センサ 9 0や温度センサ 9 1の信号を外部 ケーブルを通すことなく信号ケーブル 9 2 , 9 3によってケース 2内の 周波数変換器へと導いて各種制御を行うよ うにしたものである。 FIG. 16 shows a tenth embodiment of the frequency converter assembly of the present invention. It is a figure and is a front view which has a partial cross section. In the present embodiment, various sensors are attached to the boundary of the case that houses the pressure vessel and the frequency converter. That is, various sensors such as a pressure sensor 90 and a temperature sensor 91 are attached to the boundary between the pressure vessel 1 and the base 12 of the case 2 for accommodating the frequency converter body 3, and the pressure sensor 90 and The signal of the temperature sensor 91 is guided to the frequency converter in the case 2 by the signal cables 92 and 93 without passing through an external cable, and various controls are performed.

本実施形態によれば、 ケース 2から外部に取出すケーブル類は、 電源 の入出力用の入力側ケ一ブル 1 6 と出力側ケーブル 1 7のみとなり、 全 体の構造の簡素化が図れる。 また、 センサ類のケーブルに張力が加わつ たことによる断線の トラブルを防止することができる。  According to this embodiment, the cables to be taken out of the case 2 are only the input side cable 16 and the output side cable 17 for input / output of the power supply, and the overall structure can be simplified. In addition, it is possible to prevent a disconnection trouble caused by a tension applied to a sensor cable.

図 1 7 A , 図 1 7 Bおよび図 1 8は、 本発明の周波数変換器組立体の 第 1 1の実施の形態を示す図であり、 図 1 7 Aは部分断面を有する正面 図、 図 1 7 Bは図 1 7 Aの XVI I— XV I I線断面図、 図 1 8はその使用状態 を示す正面図である。 図 1 7 Aおよび図 1 7 Bに示すよ うに、 周波数変 換器組立体は、 両端に流体の吸込口 1 a と吐出口 1 b とを有する角筒状 の圧力容器 1 と、 この圧力容器 1にブラケッ ト 7を介して固定されたケ ース 2 とから構成され、 ケース 2の内部に周波数変換器本体 3が収納さ れている。  FIG. 17A, FIG. 17B and FIG. 18 are views showing a first embodiment of the frequency converter assembly of the present invention. FIG. 17A is a front view having a partial cross-section. 17B is a cross-sectional view taken along the line XVI I-XV II of FIG. 17A, and FIG. 18 is a front view showing a use state thereof. As shown in FIGS. 17A and 17B, the frequency converter assembly comprises a rectangular cylindrical pressure vessel 1 having a fluid suction port 1a and a discharge port 1b at both ends; 1 is composed of a case 2 fixed via a bracket 7, and the frequency converter body 3 is housed inside the case 2.

圧力容器 1 の両端には取付フランジ 4 , 5がー体に設けられている。 圧力容器 1 の一部には開口部 1 dが形成され、 ブラケッ ト 7の一部であ る冷却フィン 7 f が圧力容器 1内に突出するよ うに設けられている。 ブ ラケッ ト 7は圧力容器 1 に固定され、 ケース 2はブラケッ ト 7に密着し て固定されている。 ケース 2の構成は、 図 1 Aおよび図 1 Bに示す第 1 の実施の形態と同様である。 なお、 ケース 2に冷却フィ ンを備えたブラ ケッ トを一体成形してもよい。 At both ends of the pressure vessel 1, mounting flanges 4 and 5 are provided on the body. An opening 1 d is formed in a part of the pressure vessel 1, and a cooling fin 7 f which is a part of the bracket 7 is provided so as to protrude into the pressure vessel 1. The bracket 7 is fixed to the pressure vessel 1, and the case 2 is fixed to the bracket 7 in close contact. The configuration of Case 2 is the same as that of the first embodiment shown in FIGS. 1A and 1B. Case 2 has a cooling fin The ket may be integrally molded.

本実施形態によれば、 流体機械の自己取扱い流体にて周波数変換器を 冷却できるので、 別途専用の冷却ファンは不要となる。 また、 複数の冷 却フィンによ り効果的に冷却されるので、 取扱い流体の熱伝導率が空気 等のように小さい場合においても使用可能である。  According to the present embodiment, since the frequency converter can be cooled by the self-handled fluid of the fluid machine, a special cooling fan is not required separately. In addition, since it is cooled effectively by a plurality of cooling fins, it can be used even when the thermal conductivity of the handled fluid is as small as air.

次に、 図 1 7 Aおよび図 1 7 Bに示す周波数変換器組立体の使用例を 図 1 8を参照して説明する。 図 1 8に示すよ うに、 圧力容器 1 の吸込口 1 a側の取付フランジ 4を送風機 9 0の吐出口に接続し、 圧力容器の吐 出側 1 b側の取付フランジ 5を吐出側ダク ト 9 1に接続する。  Next, an example of use of the frequency converter assembly shown in FIGS. 17A and 17B will be described with reference to FIG. As shown in Figure 18, connect the mounting flange 4 on the suction port 1a side of the pressure vessel 1 to the discharge port of the blower 90, and attach the mounting flange 5 on the discharge side 1b side of the pressure vessel 1 to the discharge side duct. 9 Connect to 1.

また、 入力側ケーブル 1 6の他端を制御盤 1 0 5に接続し、 出力側ケ 一ブル 1 7の他端をモータ 1 0 4に接続し、 制御盤 1 ◦ 5から供給され る電力を周波数変換器に導き、 これにより周波数が変換された電力をモ —タ 1 0 4に供給することで、 モータ 1 0 4の回転数を制御する。 なお、 送風機 9 0およびモータ 1 0 4は共通ベース 1 0 2上に設置されている。 またモータ 1 0 4 と送風機 9 0とはベルト 9 2により連結されている。 本実施形態によれば、 送風機 9 0の風量調節は、 周波数変換器によるモ ータ 1 0 4の回転数調整にて行えるので、 風量調整用ダンパは不要であ り、 かつ、 ダンバ調整よ り も省エネルギー効果が大きい。  The other end of the input cable 16 is connected to the control panel 105, the other end of the output cable 17 is connected to the motor 104, and the power supplied from the control panel 1 The frequency is converted into a frequency, and the electric power whose frequency is converted is supplied to the motor 104, thereby controlling the rotation speed of the motor 104. The blower 90 and the motor 104 are installed on a common base 102. The motor 104 and the blower 90 are connected by a belt 92. According to the present embodiment, the air volume of the blower 90 can be adjusted by adjusting the number of rotations of the motor 104 by the frequency converter, so that the air volume adjustment damper is unnecessary, and the air volume can be adjusted by the damper adjustment. Also has a great energy saving effect.

図 1 9は、 本発明の周波数変換器組立体の第 1 2の実施の形態を示す 正面図である。 本実施形態においては、 圧力容器 1を立型多段ポンプ 9 5の外ケーシングに使用している。 そして、 周波数変換器を内蔵するケ ース 2はポンプの外ケ一シング （圧力容器 1 ) に密着して取り付けられ ており、 ブラケッ ト 7を介してポンプ取极液により冷却されている。 ポ ンプの外ケーシング （圧力容器 1 ) には、 吸込側配管 9 6 と吐出し側配 管 9 7 とが接続されている。 また、 入力側ケーブル 1 6の他端を制御盤 1 0 5に接続し、 出力側ケ —ブル 1 7の他端をモータ 1 0 4に接続し、 制御盤 1 0 5から供給され る電力を周波数変換器に導き、 これにより周波数が変換された電力をモ ータ 1 0 4に供給することで、 モータ 1 0 4の回転数を制御する。 本実施形態では、 ポンプに周波数変換器が実装されているので、 ボン プを周波数変換器に対応した専用設計とすることができる。 例えば、 商 用電源 （ 5 0 Z 6 0 H z ) より も高い周波数でポンプを運転して、 小型 • 軽量化を図ること等が可能である。 FIG. 19 is a front view showing a 12th embodiment of the frequency converter assembly of the present invention. In the present embodiment, the pressure vessel 1 is used for the outer casing of the vertical multi-stage pump 95. The case 2 having the built-in frequency converter is mounted in close contact with the outer casing (pressure vessel 1) of the pump, and is cooled by the pump removing liquid via the bracket 7. The suction pipe 96 and the discharge pipe 97 are connected to the outer casing (pressure vessel 1) of the pump. Also, the other end of the input side cable 16 is connected to the control panel 105, the other end of the output side cable 17 is connected to the motor 104, and the power supplied from the control panel 105 is The motor 104 is guided to a frequency converter, and the frequency-converted power is supplied to the motor 104, thereby controlling the rotation speed of the motor 104. In the present embodiment, since the frequency converter is mounted on the pump, the pump can be designed exclusively for the frequency converter. For example, it is possible to reduce the size and weight by operating the pump at a frequency higher than that of a commercial power supply (50 Z 60 Hz).

以上説明したよ うに、 本発明によれば、 ポンプ周りの使用環境に左右 されることなく、 周波数変換器をポンプ近傍に簡単に設置することがで きる。 しかも、 一般のインバ一タで必要な空冷用の電動ファンが不要と なり信頼性を向上させることができる。  As described above, according to the present invention, the frequency converter can be easily installed near the pump without being affected by the usage environment around the pump. In addition, an electric fan for air cooling, which is required for a general inverter, is not required, and the reliability can be improved.

また、 仕切弁、 逆止弁等の配管要素と一体化することで、 既設のボン プを可変速化する場合に配管の変更が不要となる。 さらに、 圧力センサ 等を組み合わせることで、 ポンプの保護機能や制御機能を付加すること ができる。  In addition, by integrating with piping elements such as gate valves and check valves, it is not necessary to change the piping when changing the existing pump to variable speed. Further, by combining a pressure sensor and the like, a protection function and a control function of the pump can be added.

これらによ り、 誰でも容易にポンプの性能調整や回転数制御を行うこ とができ、 省エネルギー化を図ることが可能となる。 産業上の利用の可能性  As a result, anyone can easily adjust the pump performance and control the number of revolutions, and can save energy. Industrial applicability

本発明は、 ポンプや送風機等の流体機械に好適に利用される。  INDUSTRIAL APPLICATION This invention is used suitably for fluid machines, such as a pump and a blower.

Claims

請求の範囲 The scope of the claims 1 . 流体の吸込口と吐出口を有する圧力容器と、 該圧力容器の外側に設 けられる周波数変換器とを備えたことを特徴とする周波数変換器組立体 ( 1. A pressure vessel having an inlet and outlet of the fluid, the frequency converter assembly is characterized in that a frequency converter eclipsed set on the outside of the pressure vessel ( 2 . 前記周波数変換器を収容して外気から密封するアルミ合金等の熱良 導体からなるケースを設け、 該ケースを前記圧力容器に密着して取り付 けたことを特徴とする請求項 1 に記載の周波数変換器組立体。 2. The case according to claim 1, wherein a case made of a heat conductive material such as an aluminum alloy that houses the frequency converter and is sealed from the outside air is provided, and the case is attached to the pressure vessel in close contact. Frequency converter assembly. 3 . 前記圧力容器とケースの一部を一体化したことを特徴とする請求項 2に記載の周波数変換器組立体。 3. The frequency converter assembly according to claim 2, wherein the pressure vessel and a part of the case are integrated. 4 . 前記圧力容器が仕切弁、 逆止弁、 圧力タンク、 ス ト レーナの少なく とも 1つを兼ねていることを特徴とする請求項 2に記載の周波数変換器 組立体。 4. The frequency converter assembly according to claim 2, wherein the pressure vessel doubles as at least one of a gate valve, a check valve, a pressure tank, and a strainer. 5 . 前記圧力容器に圧力センサを取り付け、 ポンプと組み合わせてボン プ吐出し圧力制御を行う ことを特徴とする請求項 2に記載の周波数変換 器組立体。 5. The frequency converter assembly according to claim 2, wherein a pressure sensor is attached to the pressure vessel, and a pump discharge pressure is controlled in combination with a pump. 6 . 前記圧力容器に流量測定部を設け、 ポンプと組み合わせてポンプ流 量制御を行う ことを特徴とする請求項 2に記載の周波数変換器組立体。 6. The frequency converter assembly according to claim 2, wherein a flow rate measuring unit is provided in the pressure vessel, and a pump flow rate is controlled in combination with a pump. 7 . 前記圧力容器と周波数変換器を納めるケースとの境界部に各種セン サ類を配したことを特徴とする請求項 2に記載の周波数変換器組立体。 7. The frequency converter assembly according to claim 2, wherein various sensors are arranged at a boundary portion between the pressure vessel and a case for housing the frequency converter. 8 . 前記周波数変換器を収容して、 外気から密封するアルミ合金等の熱 良導体からなるケースを設け、 該ケースを冷却ブインを備えたブラケッ トに密着させる力 、 又はケースに冷却フィ ンを一体成形し、 冷却フィ ン を前記圧力容器内に突出させていることを特徴とする請求項 1 に記載の 周波数変換器組立体。 8. A case made of a good conductor such as an aluminum alloy that accommodates the frequency converter and seals it from the outside air is provided, and a force is applied to bring the case into close contact with a bracket provided with cooling fins, or a cooling fin is integrated with the case. The frequency converter assembly according to claim 1, wherein the frequency converter is formed and a cooling fin is projected into the pressure vessel. 9 . 前記圧力容器が、 ポンプケーシングを兼ねていることを特徴とする 請求項 2に記載の周波数変換器組立体。 9. The frequency converter assembly according to claim 2, wherein the pressure vessel doubles as a pump casing.
PCT/JP1999/003666 1998-07-08 1999-07-07 Frequency converter assembly Ceased WO2000003142A1 (en)

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JP2006077708A (en) * 2004-09-10 2006-03-23 Hitachi Constr Mach Co Ltd Variable displacement swash plate type hydraulic pump
WO2009000601A1 (en) * 2007-06-26 2008-12-31 Continental Automotive Gmbh Method for dissipating heat from electronic components for the operation of a liquid pump
WO2010064055A1 (en) * 2008-12-01 2010-06-10 Electronica Products Limited Cooling electronic circuits
WO2013027499A1 (en) * 2011-08-24 2013-02-28 株式会社日立産機システム Power conversion device for driving water supply device and power conversion device for driving liquid supply device
GB2558328A (en) * 2016-09-28 2018-07-11 Electronica Products Ltd Liquid cooled heatsink
EP3376042A1 (en) * 2017-03-13 2018-09-19 Grundfos Holding A/S Mounting system for mounting a monitoring unit on a pump
EP3527829A1 (en) * 2018-02-19 2019-08-21 Grundfos Holding A/S Pump system and pump control method

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JPH109135A (en) * 1996-04-25 1998-01-13 Ebara Corp Liquid supply device with noise arrester

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JPH08109872A (en) * 1994-10-13 1996-04-30 Sanyo Electric Co Ltd Pump device
JPH0965661A (en) * 1995-08-23 1997-03-07 Matsushita Electric Ind Co Ltd Inverter device
JPH109135A (en) * 1996-04-25 1998-01-13 Ebara Corp Liquid supply device with noise arrester

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006077708A (en) * 2004-09-10 2006-03-23 Hitachi Constr Mach Co Ltd Variable displacement swash plate type hydraulic pump
WO2009000601A1 (en) * 2007-06-26 2008-12-31 Continental Automotive Gmbh Method for dissipating heat from electronic components for the operation of a liquid pump
WO2010064055A1 (en) * 2008-12-01 2010-06-10 Electronica Products Limited Cooling electronic circuits
WO2013027499A1 (en) * 2011-08-24 2013-02-28 株式会社日立産機システム Power conversion device for driving water supply device and power conversion device for driving liquid supply device
GB2558328B (en) * 2016-09-28 2022-04-06 Epropelled Ltd Cooling electronic circuits
GB2558328A (en) * 2016-09-28 2018-07-11 Electronica Products Ltd Liquid cooled heatsink
EP3376042A1 (en) * 2017-03-13 2018-09-19 Grundfos Holding A/S Mounting system for mounting a monitoring unit on a pump
EP3527829A1 (en) * 2018-02-19 2019-08-21 Grundfos Holding A/S Pump system and pump control method
CN111757986A (en) * 2018-02-19 2020-10-09 格兰富控股联合股份公司 Pressure sensor with integrated pump control
AU2019220150B2 (en) * 2018-02-19 2021-06-24 Grundfos Holding A/S Pressure sensor with integrated pump control
EP3527829B1 (en) 2018-02-19 2022-03-16 Grundfos Holding A/S Pump system and pump control method
WO2019158320A1 (en) * 2018-02-19 2019-08-22 Grundfos Holding A/S Pressure sensor with integrated pump control
CN111757986B (en) * 2018-02-19 2023-08-25 格兰富控股联合股份公司 Pressure sensor with integrated pump control

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