JP2005057934A - Inverter device and cabinet-type water feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cabinet-type water feeder that can fully exhibit cooling effect and is adapted to size reduction. <P>SOLUTION: The cabinet-type water feeder integrally houses in a cabinet 10; pumps 11, 12; piping connected to suction sides and discharge sides of the pumps 11, 12; motors 13, 14; and inverter devices 29, 30. The inverter devices 29, 30 are constituted, by constituting it of base boards 29-1, 30-1, heat radiation fins 29-2, 30-2 and cooling acceleration fans 29-3, 30-3 for accelerating cooling, respectively. Outside air is forcibly taken into the cabinet 10, when the pumps 11, 12 are operated, and the air is exchanged to heat generated by the motors 13, 14 and the inverter devices 29, 30, to be discharged outside the cabinet 10. By forcibly taking the outside air into the cabinet 10 as described above, the motors 13, 14 and the inverter devices 29, 30 can fully be cooled. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a water supply apparatus, and more particularly to a cabinet-type water supply apparatus in which a pump, a suction pipe, a discharge pipe, a drive motor, a drive power supply circuit and the like are integrally housed in a cabinet.

  The water supply device is connected to, for example, a water main or a water receiving tank, and supplies water from the water main or the water receiving tank to a predetermined consumer by pressurizing water to a predetermined pressure. For this reason, the water supply apparatus includes a pump, piping connected to the suction side and the discharge side of the pump casing, pressure sensors for detecting pressure in the piping, a pressure tank, and the like. Here, the pressure tank stores therein the water pressurized by the pump, thereby preventing frequent start and stop of the pump and maintaining the supply water pressure at a necessary pressure. In addition, a motor for driving the pump, a drive power supply circuit such as an inverter for supplying electric power to the motor, and an electric control circuit for controlling the operation of the pump, these are housed in a cabinet together with the above-mentioned pipes. Yes.

  For example, in a water supply device that is connected to a water main and adopts a constant terminal pressure control method and a constant discharge pressure control method so as to keep the feed water pressure at the end consumer at a predetermined pressure, the pump inflow pressure that varies from moment to moment On the other hand, AC / DC power of variable frequency / voltage is supplied to the induction motor and DCBL (DC brushless motor) that drive the pump by an inverter device, etc. so that the end user can always supply water with a constant water pressure, and the rotational speed Control is in progress.

  In such a water supply device, a motor drive power supply circuit such as an inverter device is essential, but since the inverter device includes a power semiconductor element (inverter element), heat is generated by the drive current of the motor. For this reason, some kind of cooling means is necessary, and conventionally the following various cooling methods have been adopted.

  There is a method of mounting an inverter device on a water cooling jacket. According to this method, cooling is performed by passing water through the water cooling jacket, so that the cooling efficiency is high and the area of the heat radiating portion can be reduced. However, piping for water cooling is required, and in order to cool only when overheated, dedicated parts such as a temperature sensor and a solenoid valve for opening and closing the water channel are required, and extra piping is required along with increased costs. . For this reason, it becomes a hindrance to miniaturization of the water supply apparatus as a whole, and further maintenance is required.

Moreover, as shown in Patent Document 1, the motor and the pump are arranged on the same rotating shaft, a pump rotor is attached to one end of the rotating shaft of the motor, a fan is attached to the other end, and the fan is rotated by rotating the motor. In some cases, the cooled air in the cabinet is directed toward the heat dissipating fins of the inverter device due to the airflow. This water supply device is suitable for miniaturization and compactness, and can form a circulating flow in the cabinet, thereby obtaining an overall cooling effect, but when the pump and motor become large and the amount of heat generated from the motor and inverter device increases, There was a problem that a sufficient cooling effect could not be obtained.
JP 2003-21052 A

  As described above, there are water cooling methods and air cooling methods for cooling the cabinet-type water supply device. However, the water cooling method increases the cost, hinders downsizing, and also maintains the equipment constituting the water cooling unit. There is a problem that it is necessary. In addition, the air-cooled type described in Patent Document 1 is effective in a cabinet-type water supply device with a small pump capacity, but there is a problem that a sufficient cooling effect cannot be obtained when the pump capacity becomes large and the drive motor becomes large. is there. An object of the present invention is to provide a cabinet-type water supply apparatus that eliminates such problems, can sufficiently exhibit a cooling effect, and is suitable for downsizing.

  In order to solve the above-mentioned problems, the invention described in claim 1 includes a board part on which an inverter element part and a control part are mounted, a fin part that radiates heat generated from the board part, and a cooling promotion fan that promotes cooling. An inverter device comprising: By providing the cooling promotion fan in this manner, air around the substrate portion and the fin portion is forced to flow and a sufficient cooling action can be obtained.

  The invention described in claim 2 is a pump that pressurizes and feeds water, a pipe connected to a suction side and a discharge side of a casing of the pump, a motor that drives the pump, and power to the motor In a cabinet-type water supply device in which an inverter device is integrally housed in a cabinet, the inverter device includes a substrate portion on which a control unit for controlling the inverter element portion and the motor is mounted, and heat generated from the substrate portion. A structure comprising a fin portion for radiating heat and a cooling promotion fan for promoting cooling, or a constitution comprising only a substrate portion, or a constitution comprising a substrate portion and a fin portion. Is forcibly taken in, exchanges heat with the heat generated by the motor and the inverter device, and exhausts the outside of the cabinet. Thus, by forcibly taking outside air into the cabinet, the motor can be sufficiently cooled, and the inverter device including the board portion and the fin portion can be sufficiently cooled as described above.

  According to a third aspect of the present invention, in the cabinet-type water supply apparatus according to the second aspect, the means for forcibly taking outside air into the cabinet is provided with a pipe in the cabinet and a fan attached to the pipe. It is characterized by performing. As described above, the piping is provided in the cabinet, and the outside air is forcibly taken into the cabinet by the fan attached to the piping, so that the outside air can be efficiently guided to the heat generating place of the motor and the inverter device in the cabinet.

  According to a fourth aspect of the present invention, in the cabinet-type water supply apparatus according to the second or third aspect, the mounting position of the intake port for taking in the outside air into the cabinet and the exhaust port for discharging the air in the cabinet is set in the inverter device. It is characterized by being positioned below the mounting position. As described above, the installation positions of the intake port and the exhaust port are located below the installation position of the inverter device, so that there is no possibility that rainwater enters the inverter device and causes insulation failure.

  The invention according to claim 5 is the cabinet-type water supply apparatus according to claim 3 or 4, characterized in that an inverter device is arranged in the pipe. Thus, by arrange | positioning an inverter apparatus in piping, an inverter apparatus can be efficiently cooled with the external air which flows through the inside of piping.

  According to a sixth aspect of the present invention, in the cabinet-type water supply apparatus according to the fifth aspect, at least a portion of the piping in which the inverter device is arranged has a configuration in which a cover is detachably attached to a pipe-shaped frame. Features. In this way, the portion where the inverter device of the piping is arranged has a structure in which the cover is detachably attached to the pipe-shaped frame, so that the maintenance work can be performed by removing the cover when the inverter device is maintained. Easy to implement.

  A seventh aspect of the present invention is the cabinet-type water supply apparatus according to the fifth or sixth aspect, wherein the portion of the piping where the inverter device is arranged is a partition plate provided between the substrate portion and the fin portion of the inverter device. The ventilation portion is composed of two systems, and the outside air is guided to the fin portion side ventilation portion by a cooling promotion fan, and the air in the cabinet is guided to the substrate portion side ventilation portion. In this way, by introducing the outside air to the fin-side vent, the fin exposed to the fin-side vent is efficiently cooled by the outside air, and some dust flows into the fin surface along with the outside air. Even if it adheres, it does not become a big trouble. In addition, since air in the cabinet is guided to the board side ventilation part, dust or the like adheres to the inverter elements made of semiconductor elements mounted on the board part or the electric parts constituting the control part, and causes insulation failure, etc. It is less likely to generate.

  According to an eighth aspect of the present invention, in the cabinet-type water supply apparatus according to the seventh aspect, the inverter device is provided with one or a plurality of additional fans in addition to the cooling promotion fan, and is forced by the additional fan. It is characterized by introducing air. Thus, by providing one or a plurality of additional fans, air can be forcibly guided by the inverter device, and the inverter device can be cooled more effectively.

  The invention according to claim 9 is the cabinet-type water supply apparatus according to claim 8, wherein the additional fan is arranged so as to be able to forcibly guide air to the ventilation portions of the two systems. To do. As described above, the additional fan can efficiently cool the fins and the substrate portion, and can force the air in the cabinet to flow.

  A tenth aspect of the present invention is the cabinet-type water supply apparatus according to the ninth aspect, wherein the ventilation ratio of the two ventilation sections by the additional fan is adjusted. In this way, by adjusting the ventilation ratio of the two ventilation portions by the additional fan, it is possible to perform appropriate cooling according to the heat radiation amount of the substrate portion and the fin portion.

  Invention of Claim 11 provides the sensor which detects the temperature of the predetermined position in a fan control means, an inverter apparatus, or a cabinet in the cabinet-type water supply apparatus of any one of Claims 7 thru | or 10, The fan control means is characterized in that the additional fan is operated when the detected temperature detected by the sensor exceeds a predetermined temperature, and is stopped when the temperature is lower than the predetermined temperature. Since the additional fan is operated when the detected temperature exceeds a predetermined temperature and stopped when the detected temperature falls below the predetermined temperature, the additional fan is operated only when necessary, and the life of the additional fan is extended.

  A twelfth aspect of the present invention is the cabinet-type water supply device according to any one of the third to eleventh aspects, wherein a pipe is added to the pipe to increase an air passage area. By adding the pipes in this way, the flow rate of guided air increases and the cooling capacity increases.

  According to a thirteenth aspect of the present invention, in the cabinet-type water supply device according to any one of the third to twelfth aspects of the present invention, an anti-insect and dust-proof device is provided at least at one place before and after the pipe entry / exit, in the middle of the inverter device. A filter for mounting is attached. By attaching the filter in this way, insects and dust do not enter the inverter device.

  A fourteenth aspect of the present invention is the cabinet-type water supply apparatus according to any one of the third to thirteenth aspects, wherein a net that does not allow fingers to enter is provided at the inlet / outlet of the pipe. By providing a net at the inlet / outlet of the pipe in this way, fingers are not inserted and injured.

  A fifteenth aspect of the present invention is the cabinet-type water supply device according to any one of the third to fourteenth aspects, wherein a louver is provided at an inlet / outlet of the pipe. By providing the louver at the inlet / outlet of the pipe in this way, even if rain blows from the side, the rainwater flowing down the louver blocks the rainwater from the side, so that the rainwater does not enter the louver.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a large capacity | capacitance cabinet-type water supply apparatus, a structure can be provided, the water supply apparatus which can fully exhibit the cooling effect and can be reduced in size can be provided.

  Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 are views showing a configuration of a water supply apparatus according to the present invention, FIG. 1 is a front view showing an arrangement configuration of devices in the cabinet, and FIG. 2 is a side view showing an arrangement configuration of devices in the cabinet. .

  In the figure, reference numeral 10 denotes a cabinet, and pumps 11 and 12 are arranged in the cabinet 10. The rotary shafts of the pumps 11 and 12 are arranged in the vertical direction, and the motors 13 and 14 are arranged on the upper side of the pump casing, respectively. The suction ports 11 a and 12 a of the pumps 11 and 12 are connected to the suction pipe 15 and are connected to the discharge collecting pipe 16 through a check valve built in the suction pipe 15. This check valve can supply water without pumps 11 and 12 when the inflow water pressure of the suction pipe 15 connected to the water main is sufficiently high, for example, and prevents backflow when the inflow side pressure is low. Is for. A pressure tank 19 for accumulating pressurized water is connected to the discharge collecting pipe 16. The pressure tank 19 accumulates pressurized water to prevent frequent start / stop of the pumps 11 and 12 and keeps the supply water pressure smoothly and constant.

  The suction pipe 15 is connected to a suction port 24 through a backflow prevention device 21, a strainer 22, and a ball valve 23, and is connected to a pipe line such as a water main pipe (not shown) through the suction port 24. The discharge collecting pipe 16 is connected to the discharge port 25 via the ball valve 18, and is connected to a pipe line to the end consumer side (not shown) through the discharge port 25. Various pipes and valves such as the pumps 11 and 12, the suction pipe 15, and the discharge collecting pipe 16 are fixed to the gantry 26 on the inner bottom portion of the cabinet 10 via a vibration isolator such as a rubber pad 43. Reference numeral 27 denotes a suction pressure sensor, 39 denotes a flow switch, and 40 denotes a check valve built-in ball valve.

  Inverter devices 29 and 30 are arranged in the upper part of the cabinet 10. The inverter devices 29 and 30 are disposed in the storage pipe 31. Here, the inverter device 29 drives the motor 13 at a variable speed by supplying AC power of variable frequency and voltage to the motor 13 via a cable (not shown). The inverter device 30 drives the motor 14 at a variable speed by supplying AC power of variable frequency and voltage to the motor 14 via a cable (not shown). The motor 13 and the pump 11 are disposed on the same rotational axis, and similarly, the motor 14 and the pump 12 are disposed on the same rotational axis.

  An intake port 32 is provided on one side surface of the cabinet 10, an exhaust port 33 is provided on the other side surface, and an additional fan 34, which will be described later, is provided at one end of a storage pipe 31 that stores the inverter devices 29 and 30. Is provided. An intake duct 35 is provided in communication with the intake port 32, and an exhaust duct 36 is provided in communication with the exhaust port 33. The intake port 32 and the exhaust port 33 are provided with a net or a louver so that fingers do not enter.

  3A and 3B are diagrams showing the inverter devices 29 and 30 and the storage pipe 31. FIG. 3A is a front view, and FIG. 3B is a side view. The inverter device 29 includes a board part 29-1 on which an inverter element part and a control part are mounted, a fin part 29-2 that radiates heat generated from the board part 29-1, and a cooling promotion fan 29- that promotes cooling. 3 is provided. Similarly, the inverter device 30 also includes a board part 30-1 on which an inverter element part and a control part are mounted, a fin part 30-2 that radiates heat generated from the board part 30-1, and a cooling promotion fan that promotes cooling. 30-3. The two inverter devices 29 and 30 are arranged side by side in the storage pipe 31. A partition plate 37 is arranged at the boundary between the substrate portions 29-1 and 30-1 and the fin portions 29-2 and 30-2 of the storage pipe 31, and the fin side ventilation portion 31-1 and the substrate portion are disposed in the storage piping 31. The side ventilation part 31-2 is divided into two systems, and the outside air is guided to the fin side ventilation part 31-1 by the cooling promotion fans 29-3 and 30-3.

  An additional fan 34 is provided at the end of the storage pipe 31, and the additional fan 34 forces air to flow through the fin-side ventilation portion 31-1 and the board-side ventilation portion 31-2. By rotating the cooling promotion fans 29-3 and 30-3 and the additional fan 34 during operation of the pumps 11 and 12, the outside air flowing in from the intake port 32 passes through the intake duct 35 as shown by an arrow A and is an inverter device. Flows from the other end to the periphery of the motors 13 and 14 in the cabinet 10 through the fin-side ventilation portion 31-1 in the storage pipe 31 for storing 29 and 30, and radiates heat from the fin portions 29-2 and 30-2. The heat exchange is performed with the heat generated and the heat radiated from the casing of the motors 13 and 14. Also, the air in the cabinet 10 flows into the board part side ventilation part 31-2, and heat exchange with the heat radiated from the board parts 29-1 and 30-1 is performed from one end where the additional fan 34 is attached. It flows out into the cabinet 10.

  As described above, by introducing the outside air to the fin-side ventilation portion 31-1, the fins of the fin portions 29-2 and 30-2 exposed to the fin-side ventilation portion 31-1 are exposed to the outside air, so that the efficiency is improved. To be cooled. In addition, some dust flows into the fin along with the outside air, and even if it adheres to the fin surface, it does not become a major obstacle. In addition, since the air in the cabinet 10 is guided to the board part side ventilation part 31-2, the board parts 29-1 and 30-1 include the inverter elements made of semiconductor elements mounted thereon and the electric parts constituting the control part. It is less likely that dust or the like will adhere to the surface and cause problems such as poor insulation.

  Although not shown, fan control means for stopping the operation of the additional fan 34 is provided, and a temperature sensor for detecting temperature is provided at a predetermined position in the inverter devices 29 and 30 or the cabinet 10, and the temperature is controlled by the fan control means. When the detected temperature detected by the sensor exceeds a predetermined temperature, the additional fan 34 is operated, and when the temperature falls below the predetermined temperature, the additional fan 34 is stopped. Accordingly, the additional fan 34 is operated only when the motors 13 and 14 and the inverters 29 and 30 generate a large amount of heat, and the life of the additional fan 34 is extended. The number of additional fans 34 is not limited to one, and a plurality of additional fans 34 may be used. As a countermeasure against failure, a spare machine may be provided and operated alternately. In addition, it automatically switches to the other when a failure occurs.

  Further, when the space in the storage pipe 31 is not sufficient and the air flow rate flowing into or out of the inverter devices 29 and 30 is not sufficient, an additional pipe 41 is added to the lower side surface of the storage pipe 31 as shown in FIG. And increase the air passage area. As a result, the flow rate of air flowing into and out of the inverter devices 29 and 30 increases, and the cooling capacity increases.

  Further, by attaching a filter for preventing insects and dust to at least one place in the middle of the intake port 32 and the intake duct 35 immediately before the inflow of the inverter device 29 in the storage pipe 31, insects and dust are put on the inverter devices 29 and 30. There is no entry. In particular, by providing a filter in the fin-side ventilation portion 31-1, dust or the like adheres to the electric components constituting the inverter elements and the control portion mounted on the board portions 29-1, 30-1 of the inverter devices 29, 30. Can be effectively prevented and accidents such as poor insulation can be prevented.

  In the cabinet-type water supply apparatus configured as described above, the cooling promotion fans 29-3 and 30-3 and the additional fan 34 of the inverter devices 29 and 30 are operated, so that the intake duct 35 extends from the intake port 32 as indicated by an arrow A. The outside air that flows into the air forcibly circulates the air around the motors 13, 14, circulates in the cabinet 10, mixes with the air discharged from the additional fan 34, passes through the exhaust duct 36, and passes through the exhaust port 33. Is discharged to the outside. As a result, the outside air flows into the storage pipe 31 that stores the inverter devices 29 and 30, forcibly cooling the inverter devices 29 and 30, and forcibly cooling the motors 13 and 14.

  As shown in FIG. 5, the storage pipe 31 has a structure in which a cover (not shown) is detachably attached to a frame 42 in the shape of the storage pipe 31, so that the inverter device 29 disposed in the storage pipe 31, During the maintenance of 30 or the like, the work such as maintenance can be easily performed by removing the cover.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. For example, in the above example, the partition pipe 37 is arranged with the substrate pipes 29-1 and 30-1 and the fin parts 29-2 and 30-2 as the boundary between the storage pipes 31 in which the inverter devices 29 and 30 are stored. The ventilation part in the inside is made into two systems of the fin side ventilation part 31-1 and the board part side ventilation part 31-2. For example, as shown in FIG. When introducing through the filter 44, it is not necessary to divide the ventilation part into two systems.

It is a front view which shows the arrangement configuration of the apparatus in the cabinet of the water supply apparatus which concerns on this invention. It is a side view which shows the arrangement configuration of the apparatus in the cabinet of the water supply apparatus which concerns on this invention. It is a figure which shows the structural example of the inverter apparatus which concerns on this invention, Fig.3 (a) is a front view, FIG.3 (b) is a side view. It is a figure which shows the structure of storage piping. It is a figure which shows the structure of storage piping. It is a front view which shows the structural example of the inverter apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cabinet 11 Pump 12 Pump 13 Motor 14 Motor 15 Suction pipe 16 Discharge collecting pipe 18 Ball valve 19 Pressure tank 21 Backflow prevention device 22 Strainer 23 Ball valve 24 Suction port 25 Discharge port 26 Base 27 Suction pressure sensor 29 Inverter device 30 Inverter device 31 Storage Piping 32 Intake Port 33 Exhaust Port 34 Fan 35 Intake Duct 36 Exhaust Duct 37 Partition Plate 39 Flow Switch 40 Check Valve Built-in Ball Valve 41 Additional Piping 42 Frame 43 Rubber Pad 44 Filter

Claims (15)

  An inverter device comprising: a board part on which an inverter element part and a control part are mounted; a fin part that radiates heat generated from the board part; and a cooling promotion fan that promotes cooling. A pump that pressurizes and feeds water, a pipe connected to a suction side and a discharge side of a casing of the pump, a motor that drives the pump, and an inverter device that supplies power to the motor are integrally formed. In a cabinet-type water supply device housed in a cabinet,
The inverter device includes a board part on which an inverter element part and a control part for controlling the motor are mounted, a fin part that radiates heat generated from the board part, and a cooling promotion fan that promotes cooling, Or a configuration comprising only the substrate portion, or a configuration comprising the substrate portion and the fin portion,
A cabinet-type water supply apparatus that forcibly takes outside air into the cabinet during the pump operation, exchanges heat with heat generated by the motor and the inverter device, and exhausts the outside of the cabinet. The cabinet-type water supply apparatus according to claim 2,
The cabinet-type water supply apparatus is characterized in that the means for forcibly taking outside air into the cabinet is provided with a pipe in the cabinet and a fan attached to the pipe. The cabinet-type water supply apparatus according to claim 2 or 3,
A cabinet-type water supply apparatus, wherein an installation position of an intake port for taking outside air into the cabinet and an exhaust port for discharging air in the cabinet is positioned below the installation position of the inverter device. The cabinet-type water supply apparatus according to claim 3 or 4,
A cabinet-type water supply device, wherein the inverter device is arranged in the pipe. The cabinet-type water supply apparatus according to claim 5,
A cabinet-type water supply device, wherein at least a portion of the pipe where the inverter device is arranged has a structure in which a cover is detachably attached to a pipe-shaped frame. The cabinet-type water supply apparatus according to claim 5 or 6,
The part where the inverter device of the piping is arranged is divided into two lines by a partition plate provided between the substrate part and the fin part of the inverter apparatus, and the outside air is guided to the fin part side ventilation part by the cooling promotion fan. The cabinet-type water supply device is configured to guide air in the cabinet to the board portion side ventilation portion. The cabinet-type water supply apparatus according to claim 7,
In addition to the cooling promotion fan, the inverter device is provided with one or more additional fans, and air is forcibly introduced by the additional fans. The cabinet-type water supply apparatus according to claim 8,
The cabinet-type water supply device, wherein the additional fan is arranged so as to be able to forcibly guide air to the two ventilation portions. The cabinet-type water supply apparatus according to claim 9,
A cabinet-type water supply device that adjusts a ventilation ratio of the two ventilation portions by the additional fan. The cabinet-type water supply apparatus according to any one of claims 7 to 10,
A sensor for detecting the temperature at a predetermined position in the fan control means, the inverter device or the cabinet is provided, and the fan control means operates the additional fan when the detected temperature detected by the sensor exceeds the predetermined temperature, and is below the predetermined temperature. A cabinet-type water supply device that stops when it becomes. The cabinet-type water supply apparatus according to any one of claims 3 to 11,
A cabinet-type water supply apparatus, wherein a pipe is added to the pipe to increase a passage area of the air. The cabinet-type water supply apparatus according to any one of claims 3 to 12,
A cabinet-type water supply apparatus, wherein a filter for preventing insects and dust is attached to at least one place of the pipe inlet / outlet, immediately before the inflow of the inverter device.   The cabinet-type water supply apparatus according to any one of claims 3 to 13, wherein a net that does not allow fingers to enter is provided at an inlet / outlet of the pipe.   The cabinet-type water supply apparatus according to any one of claims 3 to 14, wherein a louver is provided at an inlet / outlet of the pipe.

Images