JP2012110151A - Motor assembly and pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor assembly which efficiently cools an inverter, especially, a power switching element.SOLUTION: A motor assembly 2 includes: a motor 5 coupled to a pump 1; an inverter 6 fixed to a side part of the motor 5 and having a cooling fin 18; a fan mechanism 4 disposed inside the inverter 6 and agitating a gas in the inverter 6; a cooling fan 8 attached to a rotation shaft of the motor 5 and disposed at the motor 5 on the opposite side of the pump; a cover 7 covering at least a part of the motor 5 and the cooling fan 8 and disposed so as to form a gap with the motor 5; and at least a guide member 21 disposed at the gap between the motor 5 and the cover 7. The guide member 21 has a shape which leads a gas from the cooling fan 8 to the cooling fin 18 of the inverter 6.

Description

  The present invention relates to a motor assembly and a pump device, and more particularly to a motor assembly and a pump device having a cooling structure for cooling an inverter and / or a motor.

  A motor is widely used as a drive source for driving the pump. Recently, an integrated motor assembly in which an inverter is attached to a motor is becoming mainstream. The inverter includes a power switching element (for example, an insulated gate bipolar transistor (IGBT), a power MOS FET, etc.), and the power switching element can be used to change the input power supply of the motor so that the motor can be operated at a variable speed. .

  While driving such a motor assembly, the inverter and motor generate heat. In particular, the power switching element of the inverter generates high heat even though it has a small surface area, resulting in a high temperature. Moreover, since the inverter includes many electronic devices, the heat resistant temperature is lower than that of the motor. Therefore, it is important for the motor assembly to efficiently cool not only the motor but also the inverter.

  Recently, there has been developed a pump device that can increase the discharge amount while realizing miniaturization of the pump by rotating the pump at high speed. In such a type of pump device, since the motor rotates at a high speed, it is required more than ever to reduce the noise of the motor. Furthermore, during operation, considerable noise is also generated from the cooling fan connected to the rotating shaft of the motor.

  The pump device is used in various places and may be installed outdoors. In such a case, the inverter may be exposed to rain and the inverter may be damaged. Further, when the inverter is exposed to direct sunlight, the inverter becomes hot and may break down. In particular, since the power switching element of the inverter generates heat, the temperature of the inverter may exceed its heat resistance temperature.

JP-A-8-109872

The present invention has been made in view of the above-described circumstances, and provides a motor assembly capable of efficiently cooling an inverter, particularly a power switching element, and a pump device including the motor assembly. Objective.
Moreover, this invention makes it the 2nd objective to provide the pump apparatus which can reduce a noise.
The third object of the present invention is to provide a pump device that can cool a motor efficiently.
A fourth object of the present invention is to provide a motor assembly having a protective structure for preventing the inverter from direct sunlight and rain, and a pump device including the motor assembly.

  One aspect of the present invention for achieving the first object described above is a motor connected to a pump, an inverter fixed to a side portion of the motor and having cooling fins, and disposed inside the inverter. A fan mechanism that stirs the gas inside the inverter, a cooling fan that is attached to the rotating shaft of the motor and is disposed on the non-pump side of the motor, covers at least a part of the motor, and the cooling fan, A cover disposed between the motor and a gap; and at least one guide member disposed in a gap between the motor and the cover, the guide member configured to supply gas from the cooling fan to the inverter. A motor assembly characterized by having a shape leading to the cooling fin.

  According to the present invention described above, the gas (usually air) from the cooling fan is led to the guide member and intensively hits the cooling fins of the inverter. Furthermore, heat transfer is improved by increasing the flow velocity of the airflow. Therefore, the inverter can be efficiently cooled. Furthermore, since the gas in the inverter is generated by the fan mechanism, a local temperature rise in the inverter, specifically, a temperature rise in the power switching element can be prevented.

  One aspect of the present invention for achieving the second object described above includes a pump, a motor connected to the pump, a cooling shaft attached to the rotating shaft of the motor and disposed on the non-pump side of the motor. A pump device comprising: a fan, a cover that covers the motor, the cooling fan, and the pump; and a sound absorbing material or a vibration damping material attached to an inner surface of the cover.

  According to the present invention, noise generated from the motor and the cooling fan can be reduced by the sound absorbing material or the vibration damping material attached to the inner surface of the cover.

One aspect of the present invention for achieving the third object described above is a method for operating the pump device, wherein the ambient temperature around the pump device is lower than the temperature of the liquid transferred by the pump device. In this case, when the first axial fan is used to form the gas flow from the motor toward the pump in the cover, and the ambient temperature around the pump device is higher than the temperature of the liquid, The gas flow from the pump toward the motor is formed in the cover by using a second axial fan.
According to the present invention, the motor can be cooled by the gas flow formed in the cover.

Another aspect of the present invention for achieving the third object described above is a method for operating the pump device, wherein the ambient temperature of the pump device is higher than the temperature of the liquid transferred by the pump device. When the temperature is low, the cooling fan forms the gas flow from the motor toward the pump in the cover. When the temperature around the pump device is higher than the temperature of the liquid, the cooling fan Thus, the gas flow from the pump toward the motor is formed in the cover.
According to the present invention, the motor can be cooled by the gas flow formed in the cover.

  One aspect of the present invention for achieving the above-described fourth object is a motor coupled to a pump, an inverter, a fan mechanism that is disposed inside the inverter and stirs the gas inside the inverter, A cooling fan attached to the rotating shaft of the motor; a motor cover that covers a side surface of the motor; and a heat insulating cover that covers at least the inverter; and the motor cover is formed at an end portion on a side opposite to the pump. A motor assembly having a first opening and a second opening formed at an end portion on a pump side, wherein a louver is provided on a wall of the heat shield cover. is there.

  ADVANTAGE OF THE INVENTION According to this invention, the ventilation of the interior space of a heat insulation cover can be favorably maintained by a louver, shielding direct sunlight and rain with a heat insulation cover. Therefore, it is possible to prevent the inverter from rising in temperature and failure.

According to the first aspect of the present invention described above, it is possible to provide a motor assembly and a pump device that can efficiently cool an inverter, particularly a power switching element.
According to the 2nd aspect of this invention mentioned above, the pump apparatus which can reduce noise can be provided.
According to the 3rd aspect of this invention mentioned above, the pump apparatus which can cool a motor efficiently can be provided.
According to the fourth aspect of the present invention described above, it is possible to provide a motor assembly and a pump device that can withstand outdoor use.

It is a side view which shows the pump apparatus provided with the motor assembly which concerns on embodiment of this invention. 2A is a top view showing the motor assembly, FIG. 2B is a side view showing the motor assembly 2, and FIG. 2C shows the motor shown in FIG. It is the figure seen from the direction. 3A is a top view of the inverter, FIG. 3B is a back view of the inverter, and FIG. 3C is a cross-sectional view of the inverter. 4 (a) is a view of the cover as viewed from below, FIG. 4 (b) is a view of the cover of FIG. 4 (a) as viewed from the direction of arrow B, and FIG. 4 (c) is a view of FIG. It is CC sectional view taken on the line of a). It is a figure for demonstrating the flow of the air formed by rotation of a cooling fan. FIGS. 6A and 6B are diagrams showing an example in which a plurality of guide members are provided. FIG. 7A is a plan view showing an example in which a guide member is provided in the motor, and FIG. 7B is a side view of the motor shown in FIG. 7A. It is a figure which shows the example which provided the some guide member in the outer surface of the motor. Fig.9 (a) is sectional drawing which shows the example which attached the sound-absorbing material or the damping material to the inner surface of the cover, FIG.9 (b) is DD sectional view taken on the line of Fig.9 (a). FIG. 10A is a top view showing an inverter of a motor assembly according to another embodiment of the present invention, FIG. 10B is a rear view of the inverter, and FIG. 10C is a view of the inverter. FIG. 10D is a cross-sectional view, and FIG. 10D is a top view of the motor assembly. It is a side view which shows the pump apparatus provided with the motor assembly which concerns on further another embodiment of this invention. 12A is a top view of the inverter shown in FIG. 11, FIG. 12B is a back view of the inverter, and FIG. 12C is a cross-sectional view of the inverter. It is a side view which shows the pump apparatus provided with the motor assembly which concerns on further another embodiment of this invention. 14A is a cross-sectional view showing a positional relationship among the motor, the cooling fan, and the fan cover, and FIG. 14B is a bottom view of the fan cover shown in FIG. 14A, and FIG. FIG. 5 is a plan view showing a positional relationship between a cooling fan and a fan cover. It is a figure explaining the flow of the air formed by rotation of a 1st cooling fan and a 2nd cooling fan. It is a side view which shows the pump apparatus provided with the motor assembly which concerns on further another embodiment of this invention. 17 (a) is a side view showing the motor assembly shown in FIG. 16, FIG. 17 (b) is a top view of the cover, and FIG. 17 (c) is an E− of the cover shown in FIG. 17 (a). It is E line sectional drawing. FIG. 18A is a diagram illustrating a gas flow from the motor toward the pump, and FIG. 18B is a diagram illustrating a gas flow from the pump toward the motor. It is a side view which shows the pump apparatus provided with the motor assembly which concerns on further another embodiment of this invention. 20 (a) is a top view of the cover, FIG. 20 (b) is a longitudinal sectional view of the cover, and FIG. 20 (c) is a sectional view taken along line FF in FIG. 20 (b). FIG. 21A is a top view for explaining the positional relationship between the motor and the inverter, and FIG. 21B is a diagram showing the inverter when the motor shown in FIG. It is a figure which shows a state without. 22A is a top view of the inverter, FIG. 22B is a back view of the inverter, and FIG. 22C is a cross-sectional view of the inverter. FIG. 23A is a plan view schematically showing the cooling jacket, and FIG. 23B is a top view of the motor assembly. It is a top view which shows the modification of a cooling jacket. It is a top view which shows the cooling pipe as a heat exchanger. It is a side view which shows the pump apparatus provided with the motor assembly which concerns on further another embodiment of this invention. 27 (a) is a view of the cover shown in FIG. 26 as viewed from below, FIG. 27 (b) is a view of the cover of FIG. 27 (a) as viewed from arrow H, and FIG. 27 (c) is a view of FIG. It is the II sectional view taken on the line of 27 (a). It is a figure for demonstrating the flow of the air formed by rotation of a cooling fan. Fig.29 (a) is a figure which shows the example which attached the sound absorption material or the damping material to the inner surface of the cover, FIG.29 (b) is the JJ sectional view taken on the line of Fig.29 (a). FIG. 30 (a) is a side view showing a pump device provided with a motor assembly according to still another embodiment of the present invention, and FIG. 30 (b) is a partial sectional view of the pump device of FIG. 30 (a). It is. FIG. 31 (a) is a top view showing the motor assembly, FIG. 31 (b) is a side view showing the motor assembly, and FIG. 31 (c) shows the motor assembly shown in FIG. 31 (b). It is a figure which shows the state without an inverter when it sees from the direction of arrow K. 32A is a rear view of the inverter, FIG. 32B is a bottom view of the inverter, and FIG. 32C is a cross-sectional view of the inverter. 33A is a side view of the motor cover, FIG. 33B is a view of the motor cover of FIG. 33A viewed from the direction of the arrow L, and FIG. 33C is FIG. FIG. 34A is a top view of the fan cover, FIG. 34B is a longitudinal sectional view of the fan cover, and FIG. 34C is a sectional view taken along line MM in FIG. 34B. 35A is a cross-sectional view showing the positional relationship among the motor, the cooling fan, and the fan cover, and FIG. 35B is a bottom view of the fan cover shown in FIG. 35A, and FIG. FIG. 5 is a plan view showing a positional relationship between a cooling fan and a fan cover. It is a figure explaining the flow of the air formed by rotation of a cooling fan. FIG. 37 (a) is a side view showing an example in which a sound absorbing material or damping material is attached to the inner surface of the motor cover, and FIG. 37 (b) is a sectional view taken along line NN in FIG. FIG. 38 (a) is a side view showing a pump device provided with a motor assembly according to still another embodiment of the present invention, and FIG. 38 (b) is a partial sectional view of the pump device of FIG. 38 (a). It is. 39 (a) is a top view showing the motor assembly, FIG. 39 (b) is a side view showing the motor assembly, and FIG. 39 (c) shows the motor assembly shown in FIG. 39 (b). It is a figure which shows the state without an inverter when it sees from the direction of arrow O. 40 (a) is a side view of the motor cover, FIG. 40 (b) is a view of the motor cover of FIG. 40 (a) viewed from the direction of arrow P, and FIG. 40 (c) is FIG. 40 (a). FIG. It is a figure for demonstrating the flow of the air formed by rotation of a cooling fan. It is a side view showing a motor provided with a plurality of guide members. 43 (a) is a rear view showing an inverter of a motor assembly according to still another embodiment of the present invention, FIG. 43 (b) is a bottom view of the inverter, and FIG. 43 (c) is the inverter. FIG. 43 (d) is a bottom view of the motor assembly. It is a side view which shows the pump apparatus provided with the motor assembly which concerns on further another embodiment of this invention. 45 (a) is a rear view of the inverter shown in FIG. 44, FIG. 45 (b) is a bottom view of the inverter, and FIG. 45 (c) is a sectional view of the inverter. It is a side view which shows the pump apparatus provided with the motor assembly which concerns on further another embodiment of this invention. It is a longitudinal cross-sectional view which shows the pump apparatus provided with the motor assembly which concerns on further another embodiment of this invention. FIG. 48A is a top view showing the motor assembly, and FIG. 48B is a side view showing the motor assembly. FIG. 48C is a view of the motor and the heat shield cover shown in FIG. 49A is a view of the motor cover 7 as viewed from the side, FIG. 49B is a view of the motor cover 7 of FIG. 49A as viewed from the direction of the arrow R, and FIG. It is the SS sectional view taken on the line of Fig.49 (a). It is a figure which shows the example which incorporated the cooling jacket shown in FIG. 11 and FIG. 12 (a) thru | or FIG. 12 (c) in the pump apparatus shown in FIG. It is a longitudinal cross-sectional view which shows the pump apparatus provided with the motor assembly which concerns on further another embodiment of this invention. FIG. 52A is an enlarged cross-sectional view showing a part of the motor assembly shown in FIG. FIG. 52B is a plan view showing the positional relationship between the cooling fins of the inverter and the air intake holes. 53 (a) and 53 (b) are diagrams for explaining the flow of air formed by the rotation of the cooling fan. 54 (a) and 54 (b) are partially enlarged views showing a modification of the motor assembly of the above embodiment. FIG. 55 (a) is a longitudinal sectional view showing a pump device provided with a motor assembly according to still another embodiment of the present invention, and FIG. 55 (b) is a view of the motor assembly shown in FIG. 55 (a). It is an expanded sectional view showing a part. 56 (a) and 56 (b) are diagrams for explaining the flow of air formed by the rotation of the cooling fan. FIG. 57 (a) is a longitudinal sectional view showing a pump device provided with a motor assembly according to still another embodiment of the present invention, and FIG. 57 (b) is a view of the motor assembly shown in FIG. 57 (a). It is an expanded sectional view showing a part. 58 (a) and 58 (b) are diagrams for explaining the flow of air formed by the rotation of the cooling fan. FIG. 59 (a) is a longitudinal sectional view showing a pump device provided with a motor assembly according to still another embodiment of the present invention, and FIG. 59 (b) is a view of the motor assembly shown in FIG. 59 (a). It is an expanded sectional view showing a part. FIG. 60A is a longitudinal sectional view showing a modification of the above embodiment, and FIG. 60B is a plan view showing the positional relationship between the cooling fin and the first opening shown in FIG. It is. It is a longitudinal cross-sectional view which shows the pump apparatus provided with the motor assembly which concerns on further another embodiment of this invention. 62 (a) and 62 (b) are enlarged sectional views schematically showing a part of the motor assembly shown in FIG.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view showing a pump device including a motor assembly according to an embodiment of the present invention. In the embodiments described below, the same or corresponding elements are denoted by the same reference numerals, and redundant description thereof is omitted.

  The pump device includes a pump 1 that transfers liquid and a motor assembly 2 that drives the pump 1. The motor assembly 2 includes a motor 5 connected to the pump 1, an inverter 6 that controls the rotational speed of the motor 5, and a cover 7 that covers a part of the motor 5. The cover 7 is fixed to the motor 5 by a support member (not shown). As the motor 5, a synchronous motor using a permanent magnet as a rotor is used. This type of motor (Permanent Magnet motor) has a feature that it is more efficient than a general motor and therefore generates less heat. However, it goes without saying that other types of motors may be used.

  The pump 1 is driven by the motor assembly 2, sucks liquid from the suction port 1a, pressurizes it, and discharges it from the discharge port 1b. An example of the pump 1 is a multi-stage centrifugal pump, but other types of pumps may be used.

  2 (a) is a top view showing the motor assembly 2, FIG. 2 (b) is a side view showing the motor assembly 2, and FIG. 2 (c) shows the motor 5 shown in FIG. 2 (b). It is the figure seen from the direction of arrow A. In FIGS. 2A and 2B, the cover 7 is indicated by an imaginary line for the sake of explanation. A cooling fan 8 is disposed on the opposite side of the motor 5 from the pump, and the cooling fan 8 is attached to the rotating shaft 10 of the motor 5. Therefore, the cooling fan 8 rotates integrally with the rotating shaft 10 of the motor 5.

  The inverter 6 is fixed to the side portion of the motor 5 via the motor side bracket 11 and the inverter side bracket 12. More specifically, the motor side bracket 11 is formed on the side of the motor 5, and the inverter side bracket 12 is formed on the bottom of the inverter 6. The motor side bracket 11 and the inverter side bracket 12 are connected to each other by a bolt (not shown), whereby the inverter 6 is integrally attached to the motor 5. The motor side bracket 11 is formed with a through hole through which a power line extending from the inverter 6 to the motor 5 passes. A through hole connected to the through hole of the motor side bracket 11 is also formed in the inverter side bracket 12.

  The cover 7 has a shape that covers the cooling fan 8 and the upper half of the motor 5, and a gap is formed between the outer surface of the motor 5 and the inner surface of the cover 7. A plurality of cooling fins 13 are formed on the side surface of the motor 5 that is not covered by the cover 7. An air intake hole (described later) is formed in the upper part of the cover 7, and the air flow is formed in the gap between the cover 7 and the motor 5 by rotating the cooling fan 8. .

  3A is a top view of the inverter 6, FIG. 3B is a back view of the inverter 6, and FIG. 3C is a cross-sectional view of the inverter 6. The inverter 6 includes a power switching element 15, a control board 16 that controls the operation of the power switching element 15, and a box 17 that houses the power switching element 15 and the control board 16. The power switching element 15 is fixed to the box 17 in contact with the inner surface of the bottom of the box 17. The bottom of the inverter 6 faces the motor 5, and cooling fins 18 are provided on the entire outer surface of the bottom. These cooling fins 18 are close to the side surface of the motor 5 and are adjacent to the cooling fins 13 of the motor 5.

  As shown in FIG. 3C, a fan mechanism 4 for stirring the air inside the inverter 6 is disposed inside the inverter 6. The fan mechanism 4 is disposed in the vicinity of the power switching element 15. The fan mechanism 4 includes a fan 4A and a motor 4B that rotates the fan 4A. In general, since the power switching element 15 generates more heat than the control board 16, a temperature gradient is formed inside the inverter 6. The fan mechanism 4 is provided in order to eliminate such a temperature gradient and make the temperature inside the inverter 6 uniform. That is, the high-temperature air surrounding the power switching element 15 is forcibly moved by the fan mechanism 4. As a result, a local temperature increase in the inverter 6, that is, a temperature increase of the power switching element 15 can be suppressed. The installation position of the fan mechanism 4 is not particularly limited as long as the air inside the inverter 6 can be stirred.

  4 (a) is a view of the cover 7 as viewed from below, FIG. 4 (b) is a view of the cover 7 of FIG. 4 (a) as viewed from the direction of arrow B, and FIG. It is CC sectional view taken on the line 4 (a). An air intake hole (gas intake hole) 20 for the cooling fan 8 is formed in the upper part (end on the side opposite to the pump) of the cover 7. The lower end (pump side end) of the cover 7 is formed obliquely, and a guide member 21 that is inclined along the lower end is fixed to the inner surface of the cover 7. The guide member 21 is composed of an annular plate that is partially cut off, and is inclined downward toward the inverter 6. The guide member 21 is located in a gap between the inner surface of the cover 7 and the outer surface of the motor 5, and is formed so as to close the gap at the lower end of the cover 7.

  FIG. 5 is a view for explaining the flow of air formed by the rotation of the cooling fan 8. As shown in FIG. 5, the rotation of the cooling fan 8 causes air (gas) to flow into the cover 7 from the air intake hole 20, and a downward flow is formed in the gap between the motor 5 and the cover 7. The air flows along the outer surface of the motor 5 toward the guide member 21, and the traveling direction of the air is directed to the inverter 6 by the guide member 21. Then, the air flows between the cooling fins 18 provided at the bottom of the inverter 6, thereby cooling the inverter 6. Thus, since the air flow can be concentrated on the inverter 6 by the guide member 21, the inverter 6 can be effectively cooled.

  In general, since the motor 5 has a large surface area of a stator (coil) that is a heat generating part, it is easy to dissipate heat, and cooling is relatively easy. On the other hand, since the inverter 6 has a small surface area of the power switching element 15 that is a heat generating part, it is difficult for cooling by heat dissipation to proceed. Furthermore, since the inverter 6 has many electronic devices, the heat resistant temperature is lower than that of the motor 5.

  According to the above-described embodiment, since the air flow formed by the cooling fan 8 can be forced to the inverter 6, the air flow intensively hits the inverter 6, and the air flow velocity is further increased. Heating improves heat transfer. Therefore, the inverter 6 can be quickly cooled. Further, as shown in FIG. 3C, the power switching element 15 is in contact with the bottom of the box 17 and the cooling fin 18 is formed on the bottom, so that the cooling efficiency can be further increased.

  Since air from the cooling fan 8 flows along a part of the motor 5, this air flow also contributes to cooling of the motor 5. Further, the motor 5 is cooled by cooling fins 13 formed on the outer surface thereof. Since the heat-resistant temperature of the motor 5 is relatively high, the motor 5 can be sufficiently cooled by the cooling fins 13 and the air flow.

  Here, as shown to Fig.6 (a) and FIG.6 (b), the some guide member 21 can also be provided. Further, the guide member 21 can be provided not on the inner surface of the cover 7 but on the outer surface of the motor 5. FIG. 7A is a plan view showing an example in which the guide member 21 is provided on the outer surface of the motor 5, and FIG. 7B is a side view of the motor 5 shown in FIG. 7A. Furthermore, as shown in FIG. 8, a plurality of guide members 21 may be provided on the outer surface of the motor 5.

  During the operation of the motor assembly 2, noise is generated from the motor 5 and the cooling fan 8. Therefore, in order to reduce such noise, it is preferable to attach a sound absorbing material or damping material (represented by reference numeral 23 in FIGS. 9A and 9B) to the inner surface of the cover 7. . When such a configuration is adopted, it is preferable to use a cover 7 having a slightly larger size than when no sound absorbing material or vibration damping material is provided. Here, the sound absorbing material refers to a member that absorbs sound by taking sound inside and converting sound energy into heat energy. Examples of the sound absorbing material include sponge and urethane foam. More preferably, a silencer is used as the sound absorbing material. On the other hand, the damping material refers to a member that reduces solid vibration by converting solid vibration energy into heat energy. Examples of the damping material include a rubber plate and a plastic plate.

Next, another embodiment of the present invention will be described with reference to FIGS. 10 (a) to 10 (d).
FIG. 10A is a top view showing an inverter 6 of a motor assembly 2 according to another embodiment of the present invention, FIG. 10B is a back view of the inverter 6, and FIG. FIG. 10D is a sectional view of the inverter 6, and FIG. 10D is a top view of the motor assembly 2. In addition, in FIG.10 (d), the cover 7 is represented by the imaginary line. Since the configuration and operation of this embodiment that are not specifically described are the same as those of the above-described embodiment, redundant description thereof is omitted.

  In this embodiment, the cooling fins 18 are provided only on part of the outer surface of the bottom of the box 17. More specifically, the power switching element 15 is in contact with the inner surface of the box 17, the cooling fin 18 is provided on the outer surface of the box 17, and the power switching element 15 and the cooling fin 18 are located at positions corresponding to each other (opposite positions). )It is in. The installation area of the cooling fin 18 is substantially the same as the contact area between the power switching element 15 and the box 17.

  Further, an auxiliary guide member (second guide member) 22 for concentrating the air guided by the guide member 21 on the cooling fin 18 is provided on the outer surface of the bottom portion of the box 17. The auxiliary guide member 22 is disposed on both sides of the cooling fin 18. Each auxiliary guide member 22 has an inclined portion that is inclined toward an end portion (the upper end in this example) of the cooling fin 18.

  According to this embodiment, most of the air sent from the cooling fan 8 can be used for cooling the power switching element 15. Therefore, it is possible to quickly cool the power switching element 15 that generates the largest amount of heat. In this embodiment as well, a sound absorbing material or a vibration damping material may be attached to the inner surface of the cover 7.

  FIG. 11 is a side view showing a pump apparatus including a motor assembly according to still another embodiment of the present invention. 12A is a top view of the inverter 6 shown in FIG. 11, FIG. 12B is a back view of the inverter 6, and FIG. 12C is a cross-sectional view of the inverter 6. In FIG. 11, the cover 7 is represented by an imaginary line for the sake of explanation. Since the configuration and operation of this embodiment that are not specifically described are the same as those of the above-described embodiment, redundant description thereof is omitted.

  A cooling jacket 24 is fixed to the inverter 6. The cooling jacket 24 is connected to the pump 1 via an inflow line (liquid supply line) 25 and an outflow line (liquid return line) 26 through which liquid flows. The end of the inflow line 25 is connected to the discharge side flow path of the pump 1, and the end of the outflow line 26 is connected to the suction side flow path of the pump 1. When the pump 1 is driven, a differential pressure is generated between the discharge-side flow path and the suction-side flow path of the pump 1, and part of the liquid transferred to the pump 1 passes through the inflow line 25 due to this differential pressure. And then flows into the cooling jacket 24, passes through the cooling jacket 24, and returns to the pump 1 through the outflow line 26.

  The location where the cooling jacket 24 is attached is the same as the location where the cooling fins 18 of the above-described embodiment are provided. That is, the power switching element 15 is in contact with the inner surface of the box 17, the cooling jacket 24 is in contact with the outer surface of the box 17, and the power switching element 15 and the cooling jacket 24 are in positions corresponding to each other (opposite positions).

  Usually, the liquid transferred by the pump 1 has a temperature lower than the temperature of the inverter 6. Therefore, while the liquid passes through the cooling jacket 24, heat exchange is performed between the inverter 6 and the liquid, thereby cooling the inverter 6. Further, since the internal gas of the inverter 6 is agitated by the fan mechanism 4, dew condensation in the inverter 6 can be prevented even if a liquid having a low temperature flows in the outflow line 26.

  Cooling fins 18 are provided on the outer surface of the bottom portion of the box 17 of the inverter 6 except for the portion where the cooling jacket 24 is attached. Accordingly, the entire inverter 6 is cooled by the air sent by the cooling fan 8. As described above, the entire inverter 6 can be cooled by the cooling fins 18 while the power switching element 15 is cooled by the cooling jacket 24, so that the inverter 6 can be cooled more efficiently. In this embodiment as well, a sound absorbing material or a vibration damping material may be attached to the inner surface of the cover 7.

  FIG. 13 is a side view showing a pump apparatus including a motor assembly according to still another embodiment of the present invention. 14A is a cross-sectional view showing a positional relationship among the motor, the cooling fan, and the fan cover, and FIG. 14B is a bottom view of the fan cover shown in FIG. 14A, and FIG. FIG. 5 is a plan view showing a positional relationship between a cooling fan and a fan cover.

  The pump device shown in this embodiment includes a second cooling fan 9 in addition to the cooling fan 8. The second cooling fan 9 is fixed to the rotary shaft 10 and is disposed below the motor 5 (that is, on the pump side of the motor 5). The second cooling fan 9 is surrounded by a fan cover 30, and a bracket 19 is integrally formed on the lower surface of the fan cover 30. The bracket 19 is disposed between the second cooling fan 9 and the pump 1.

  The fan cover 30 is disposed in the vicinity of the lower end (pump side end) of the motor 5 and has a shape surrounding the entire second cooling fan 9 and the lower end of the motor 5. A plurality of support bases 14 that support the lower end of the motor 5 are integrally formed on the inner surface of the fan cover 30. These support bases 14 are arranged at equal intervals around the rotation shaft 10 of the motor 5, and thereby a gap is formed between the fan cover 30 and the motor 5.

  An air intake hole (gas intake hole) 30 a is formed at the bottom of the fan cover 30. The bracket 19 includes a plurality of support columns 19a disposed around the air intake hole 30a, and a pedestal 19b integrally connected to the lower ends of the support columns 19a. The fan cover 30 has a shape that forms a gas flow (upflow) from the second cooling fan 9 toward the guide member 21 (see FIG. 5) along the side surface of the motor 5. That is, when the second cooling fan 9 is rotated, air flows into the fan cover 30 from the air intake hole 30 a and rises along the side surface of the motor 5.

  FIG. 15 is a diagram illustrating the flow of air formed by the rotation of the first cooling fan 8 and the second cooling fan 9. As already described, the rotation of the first cooling fan 8 causes air (that is, gas) to flow into the cover 7 and form a downward flow in the gap between the motor 5 and the cover 7. The air flows along the side surface of the motor 5 toward the guide member 21, and the traveling direction of the air is directed to the inverter 6 by the guide member 21. Then, the air flows between the cooling fins 18 provided at the bottom of the inverter 6, thereby cooling the inverter 6.

  Further, air (ie, gas) flows into the fan cover 30 by the rotation of the second cooling fan 9 and rises between the cooling fins 13 formed on the outer surface of the motor 5, thereby cooling the motor 5. The This upward flow of air collides with the lower surface of the guide member 21, changes its flow direction, and flows in the direction opposite to the inverter 6. In this way, the first cooling fan 8 and the second cooling fan 9 form a downward flow and an upward flow that face each other.

  FIG. 16 is a side view showing a pump device according to still another embodiment of the present invention. The pump device includes a pump 1 that transfers liquid, a motor assembly 2 that drives the pump 1, and a cover 7 that covers the motor assembly 2 and the pump 1. In the present embodiment, no inverter is provided. In FIG. 16, the cross section of the cover 7 is shown.

  The motor assembly 2 includes a motor 5 connected to the pump 1 and a cooling fan 8 that cools the motor 5. An axial fan is used as the cooling fan 8. The cover 7 has a shape that covers the entire motor 5 and the cooling fan 8, and further has a shape that covers most of the pump 1. In the example shown in FIG. 16, the upper half of the pump 1 is completely covered by the cover 7. The cover 7 is fixed to the motor 5 or the pump 1 by a support member (not shown). The cooling fan 8 is disposed on the side opposite to the pump of the motor 5, and the cooling fan 8 is attached to the rotating shaft 10 of the motor 5. Therefore, the cooling fan 8 rotates integrally with the motor 5.

  17 (a) is a side view showing the motor assembly shown in FIG. 16, FIG. 17 (b) is a top view of the cover 7, and FIG. 17 (c) is a view of the cover 7 shown in FIG. 17 (a). It is EE sectional view taken on the line. In FIG. 17A, a cross section of the cover 7 is shown. A gap is formed between the outer surface of the motor 5 and the inner surface of the cover 7. An air intake hole (gas intake hole) 20 for the cooling fan 8 is formed in the upper part of the cover 7. Cooling fins 13 are provided on the entire side surface of the motor 5.

  When the cooling fan 8 is rotated, air (gas) flows into the cover 7 from the air intake hole 20. The air flows through the gap between the cover 7 and the motor 5, passes between the cooling fins 13, further contacts the pump 1, and flows out from the cover 7. While the air flow is in contact with the cooling fins 13, heat exchange is performed between the air and the cooling fins 13, thereby cooling the motor 5.

  A sound absorbing material 23 is attached to the inner surface of the cover 7. FIG. 17A shows a cross section of the sound absorbing material 23. The sound absorbing material 23 is disposed so as to surround the entire side surface of the motor 5. Here, the sound absorbing material refers to a member that absorbs sound by taking sound inside and converting sound energy into heat energy. Examples of the sound absorbing material 23 include sponge and urethane foam. More preferably, a silencer is used as the sound absorbing material 23. This silencer has a double wall structure, and a large number of small holes are formed on its inner surface. The cover 7 can also be used as the outer wall of the silencer. In this case, the silencer can be configured by inserting into the cover 7 a cylindrical member having a number of small holes and having a diameter slightly smaller than that of the cover 7.

  The cover 7 covers the entire motor 5 and the cooling fan 8, and the cover 7 itself functions as a soundproofing material. Furthermore, since the sound absorbing material 23 attached to the inner surface of the cover 7 absorbs the noise of the motor 5 and the cooling fan 8, the noise from the motor assembly 2 can be greatly reduced. A vibration damping material may be attached to the inner surface of the cover 7 instead of the sound absorbing material. In this case, it is preferable to dispose the vibration damping material so as to cover the entire side surface of the motor 5 as in the above-described sound absorbing material. Here, the damping material refers to a member that reduces solid vibration by converting solid vibration energy into heat energy. Examples of the damping material include a rubber plate and a plastic plate.

  The cooling fan 8 is an axial fan as described above. The cooling fan 8 and the cover 7 are detachable, and another cooling fan can be attached by removing the cooling fan 8 and the cover 7. According to such a structure, a cooling fan to be used can be appropriately selected from a plurality of cooling fans prepared in advance according to the situation of the pump device. For example, as shown in FIG. 18 (a) and FIG. 18 (b), two cooling fans (first axial fan 8A, It is preferable to prepare a second axial flow fan 8B) in advance and selectively use one of the cooling fans 8A and 8B depending on the operation status of the pump device. The blade angle is an angle of the blade with respect to the circumferential direction of the cooling fan. In addition, the prepared two cooling fans are examples, and of course, three or more cooling fans may be prepared.

  In the example shown in FIG. 18A, air flows into the cover 7 from the air intake hole 20 (see FIG. 17B) by the rotation of the cooling fan 8A, and the gap between the motor 5 and the cover 7 and the pump 1 Passes through the gap between the cover 7 and the cover 7 and flows out from the lower opening of the cover 7. In this way, an air flow from the motor 5 toward the pump 1 is formed in the cover 7. The example shown in FIG. 18A is suitable when the ambient temperature around the pump device is lower than the temperature of the liquid transferred by the pump device.

  On the other hand, in the example shown in FIG. 18B, air flows into the cover 7 from the lower opening of the cover 7 due to the rotation of the cooling fan 8B, and the gap between the pump 1 and the cover 7 and the motor 5 and the cover 7 And flows out from the air intake hole 20. In this way, an air flow from the pump 1 toward the motor 5 is formed in the cover 7. The example shown in FIG. 18B is suitable when the ambient temperature around the pump device is higher than the temperature of the liquid transferred by the pump device. That is, in this case, the motor 5 can be cooled by the air in contact with the pump 1.

  In the example shown in FIGS. 18A and 18B, two cooling fans (axial fans) 8A and 8B having different blade angles are used, but a cooling fan having a variable blade angle is used. May be. Even if such a cooling fan is used, air flows in opposite directions as shown in FIGS. 18A and 18B can be formed.

  Next, still another embodiment of the present invention will be described with reference to the drawings. FIG. 19 is a side view showing a pump device including a motor assembly according to an embodiment of the present invention. The pump device includes a pump 1 that transfers liquid and a motor assembly 2 that drives the pump 1. The motor assembly 2 includes a motor 5 connected to the pump 1, an inverter 6 that controls the rotational speed of the motor 5, and a cover 7 that covers the motor 5. FIG. 19 shows a longitudinal section of the cover 7. The cover 7 is fixed to the motor 5 by a support member (not shown).

  A cooling fan 8 is disposed on the side of the motor 5 opposite to the pump, and the cooling fan 8 is attached to the rotating shaft 10 of the motor 5. Therefore, the cooling fan 8 rotates integrally with the rotating shaft 10 of the motor 5. As shown in FIG. 19, a cooling jacket 24 is disposed between the cooling fan 8 and the motor 5. The cooling jacket 24 is disposed close to the cooling fan 8. The cooling jacket 24 is a heat exchanger that exchanges heat between the liquid sent from the pump 1 and the gas (generally air) sent from the cooling fan 8.

  The cover 7 has a shape that covers the cooling fan 8, the cooling jacket 24, and the entire motor 5, and a gap is formed between the outer surface of the motor 5 and the inner surface of the cover 7. A plurality of cooling fins 13 are formed on the side surface of the motor 5. An air intake hole (described later) is formed in the upper part of the cover 7, and the air flow is formed in the gap between the cover 7 and the motor 5 by rotating the cooling fan 8. .

  20A is a top view of the cover 7, FIG. 20B is a vertical cross-sectional view of the cover 7, and FIG. 20C is a cross-sectional view taken along line FF in FIG. 20B. The cover 7 has a shape that surrounds almost the entire cooling fan 8, cooling jacket 24, and motor 5. An air intake hole (gas intake hole) 20 for the cooling fan 8 is formed in the upper part of the cover 7.

  A sound absorbing material 23 is attached to the inner surface of the cover 7. The sound absorbing material 23 is disposed so as to surround the side surface of the motor 5. Examples of the sound absorbing material 23 include sponge and urethane foam. More preferably, a silencer is used as the sound absorbing material 23. A vibration damping material may be attached to the inner surface of the cover 7 instead of the sound absorbing material 23. In this case, it is preferable to arrange the vibration damping material so as to cover the side surface of the motor 5 as in the above-described sound absorbing material. Examples of the damping material include a rubber plate and a plastic plate.

  21A is a top view for explaining the positional relationship between the motor 5 and the inverter 6, and FIG. 21B is a view when the motor 5 shown in FIG. It is a figure which shows the state without the inverter 6. FIG. The inverter 6 is fixed to the side portion of the motor 5 via the motor side bracket 11 and the inverter side bracket 12.

  FIG. 22A is a top view of the inverter 6, FIG. 22B is a back view of the inverter 6, and FIG. 22C is a cross-sectional view of the inverter 6. The box 17 of the inverter 6 is formed with a through hole 6a through which the outflow line (liquid return line) 26 passes. A fan mechanism 4 is disposed inside the inverter 6. The basic configuration of the inverter 6 and the fan mechanism 4 is the same as the configuration shown in FIGS. 3 (a) to 3 (c).

  FIG. 23A is a plan view schematically showing the cooling jacket 24, and FIG. 23B is a top view of the motor assembly 2. In FIG. 23B, the cover 7 is indicated by an imaginary line. The cooling jacket 24 includes a jacket 27 made of a metal having good thermal conductivity, and a liquid flow path 28 extending meandering through the jacket 27. The ends of the liquid flow path 28 communicate with an inflow line (liquid supply line) 25 and an outflow line (liquid return line) 26, respectively. A through hole 27 a into which the rotary shaft 10 is inserted is formed at the center of the jacket 27. The liquid supplied from the pump 1 flows through the inflow line 25, the cooling jacket 24, and the outflow line 26 in this order, and is returned to the pump 1 again.

  The cooling jacket 24 is connected to the pump 1 via an inflow line 25 and an outflow line 26. The end of the inflow line 25 is connected to the discharge side flow path of the pump 1, and the end of the outflow line 26 is connected to the suction side flow path of the pump 1. The outflow line 26 extends through the inverter 6. When the pump 1 is driven, a differential pressure is generated between the discharge-side flow path and the suction-side flow path of the pump 1, and part of the liquid transferred by the pump 1 passes through the inflow line 25 due to this differential pressure. And then flows into the cooling jacket 24, passes through the cooling jacket 24, and returns to the pump 1 through the outflow line 26.

  In the above configuration, when the rotating shaft 10 of the motor 5 is rotated, the pump 1 is driven and the cooling fan 8 is rotated at the same time. A part of the liquid transferred by the pump 1 is sent to the cooling jacket 24 through the inflow line 25. On the other hand, when the cooling fan 8 rotates, air (gas) flows into the cover 7 from the air intake hole 20. This air hits the cooling jacket 24 and is cooled by heat exchange with the liquid. The cooled air flows through the gap between the cover 7 and the motor 5, passes between the cooling fins 13 and 18, and flows out from the cover 7.

  While the air flow is in contact with the cooling fins 13, 18, heat exchange is performed between the air and the cooling fins 13, 18, thereby cooling the motor 5 and the inverter 6. As shown in FIG. 22C, the power switching element 15 is in contact with the bottom of the box 17, and the cooling fin 18 is formed on the bottom, so that the power switching element 15 having a large amount of heat can be efficiently cooled. Can do. Furthermore, heat exchange is also performed between the liquid flowing in the outflow line 26 and the air inside the inverter 6. As a result, the inverter 6, particularly the power switching element 15, is cooled by the liquid in the outflow line 26. Furthermore, since the air inside the inverter 6 is agitated by the fan mechanism 4, dew condensation in the inverter 6 can be prevented even if a liquid having a low temperature flows in the outflow line 26.

  FIG. 24 is a plan view showing a modification of the cooling jacket. In this example, radially extending fins 40 are formed on the upper surface of the cooling jacket 24 (the surface of the jacket 27 facing the cooling fan 8). The fins 40 increase the surface area of the cooling jacket 24 and form a uniform air flow covering the entire circumference of the motor 5. Instead of the cooling jacket 24, as shown in FIG. 25, a cooling pipe 29 composed of meandering pipes may be used as a heat exchanger.

  FIG. 26 is a side view showing a pump device including a motor assembly according to still another embodiment of the present invention. This embodiment has the same basic configuration as that of the above-described embodiment, but differs from the above-described embodiment in that it has a structure in which the air cooled by the cooling jacket 24 is concentrated on the inverter 6. Yes. That is, a guide member 21 that guides the air flow from the cooling fan 8 to the inverter 6 is provided in the gap between the inner surface of the cover 7 and the outer surface of the motor 5. In FIG. 26, the cover 7 is indicated by an imaginary line. In addition, since the structure of this embodiment which is not demonstrated in particular is the same as that of embodiment mentioned above, the overlapping description is abbreviate | omitted.

  27 (a) is a view of the cover 7 shown in FIG. 26 as viewed from below, and FIG. 27 (b) is a view of the cover 7 of FIG. 27 (a) as viewed from the arrow H, and FIG. FIG. 28 is a cross-sectional view taken along the line II of FIG. The lower end (pump side end) of the cover 7 is formed obliquely, and a guide member 21 that is inclined along the lower end is fixed to the inner surface of the cover 7. The guide member 21 is composed of an annular plate that is partially cut off, and is inclined downward toward the inverter 6. The guide member 21 is located in a gap between the inner surface of the cover 7 and the outer surface of the motor 5, and is formed so as to close the gap at the lower end of the cover 7.

  FIG. 28 is a view for explaining the flow of air formed by the rotation of the cooling fan 8. As shown in FIG. 28, the rotation of the cooling fan 8 causes air (gas) to flow into the cover 7 from the air intake hole 20 and is cooled by the cooling jacket 24. This cooled air forms a downward flow in the gap between the motor 5 and the cover 7. The air flows along the outer surface of the motor 5 toward the guide member 21, and the traveling direction of the air is directed to the inverter 6 by the guide member 21. Then, the air flows between the cooling fins 18 provided at the bottom of the inverter 6, thereby cooling the inverter 6. Thus, since the air flow can be concentrated on the inverter 6 by the guide member 21, the inverter 6 can be effectively cooled.

  Cooling fins 13 are provided on the side surfaces of the motor 5 that are not covered by the cover 7. Since air from the cooling fan 8 flows along a part of the motor 5, this air flow also contributes to cooling of the motor 5. Further, the motor 5 is cooled by the cooling fins 13. Since the heat-resistant temperature of the motor 5 is relatively high, the motor 5 can be sufficiently cooled by the cooling fins 13 and the air flow.

  A plurality of guide members 21 can also be provided. Further, the guide member 21 can be provided not on the inner surface of the cover 7 but on the outer surface of the motor 5. Furthermore, also in this embodiment, the cooling jacket 24 may have the radial fins 40 shown in FIG. Furthermore, as indicated by reference numeral 23 in FIGS. 29A and 29B, a sound absorbing material or a vibration damping material may be attached to the inner surface of the cover 7.

  In each embodiment mentioned above, although the cooling jacket 24 is arrange | positioned between the cooling fan 8 and the motor 5, this invention is not limited to this arrangement | positioning. For example, the cooling jacket (heat exchanger) 24, the cooling fan 8, and the motor 5 may be arranged in this order, and the air sucked by the cooling fan 8 may be cooled by the cooling jacket 24. In this case, the cooling jacket 24 may be covered with the cover 7 together with the cooling fan 8, or may be disposed close to the cooling fan 8 outside the cover 7. Further, instead of the cooling jacket 24, a cooling pipe 29 shown in FIG. 25 may be provided.

  Next, still another embodiment of the present invention will be described. FIG. 30 (a) is a side view showing a pump device including a motor assembly according to an embodiment of the present invention, and FIG. 30 (b) is a partial cross-sectional view of the pump device of FIG. 30 (a). . The pump device includes a pump 1 that transfers liquid and a motor assembly 2 that drives the pump 1. The motor assembly 2 includes a motor 5 coupled to the pump 1, an inverter 6 that controls the rotational speed of the motor 5, a cooling fan 8 disposed between the motor 5 and the pump 1, and the motor 5 and the cooling fan. And a cover 7 that covers 8. In FIG.30 (b), the cross section of the cover 7 is shown. The cover 7 includes a motor cover 7A having a shape surrounding the side surface of the motor 5 and a fan cover 7B having a shape covering the entire cooling fan 8. A plurality of cooling fins 13 are formed on the side surface of the motor 5.

  FIG. 31A is a top view showing the motor assembly 2, and FIG. 31B is a side view showing the motor assembly 2. FIG. 31C is a diagram showing a state where the inverter 6 is not present when the motor assembly 2 shown in FIG. 31B is viewed from the direction of the arrow K. In FIG. 31B, the cover 7 is indicated by an imaginary line for explanation.

  The cooling fan 8 is disposed on the pump side of the motor 5 and is attached to the rotating shaft 10 of the motor 5. Therefore, the cooling fan 8 rotates integrally with the rotating shaft 10 of the motor 5. The cooling fan 8 is made of a material having good thermal conductivity such as metal. Accordingly, part of the heat of the motor 5 is transmitted to the cooling fan 8 through the rotating shaft 10 and is radiated from the cooling fan 8. The cooling fan 8 may be made of a material such as plastic.

  The inverter 6 is fixed to the side portion of the motor 5 via the motor side bracket 11 and the inverter side bracket 12. FIG. 32A is a rear view of the inverter 6, FIG. 32B is a bottom view of the inverter 6, and FIG. 32C is a cross-sectional view of the inverter 6. A fan mechanism 4 is disposed inside the inverter 6. The basic configuration of the inverter 6 and the fan mechanism 4 is the same as the configuration shown in FIGS. 3 (a) to 3 (c).

  33 (a) is a side view of the motor cover 7A, FIG. 33 (b) is a view of the motor cover 7A of FIG. 33 (a) viewed from the direction of the arrow L, and FIG. 33 (c) is FIG. It is a bottom view of (a). 34 (a) is a top view of the fan cover 7B, FIG. 34 (b) is a longitudinal sectional view of the fan cover 7B, and FIG. 34 (c) is a cross-sectional view taken along line MM in FIG. 34 (b). FIG. 35A is a cross-sectional view showing the positional relationship among the motor 5, the cooling fan 8, and the fan cover 7B, and FIG. 35B is a bottom view of the fan cover 7B shown in FIG. 35 (c) is a plan view showing the positional relationship between the cooling fan 8 and the fan cover 7B.

  The upper end (anti-pump side end) and the lower end (pump side end) of the motor cover 7A are open. The lower end opening of the motor cover 7A is connected to the upper end opening of the fan cover 7B. The cover 7 is configured by connecting the lower end opening of the motor cover 7A and the upper end opening of the fan cover 7B. The cover 7 may be configured by integrally molding the motor cover 7A and the fan cover 7B. The motor cover 7A has a shape that covers the entire side surface of the motor 5, and a gap is formed between the outer surface of the motor 5 and the inner surface of the motor cover 7A.

  As shown in FIGS. 31 (b) and 33 (b), an opening 7Aa is formed in the side portion of the motor cover 7A, and the cooling fins 18 of the inverter 6 are connected to the motor 5 so as to penetrate the opening 7Aa. It extends toward. That is, the cooling fin 18 of the inverter 6 is close to the side surface of the motor 5 and is adjacent to the cooling fin 13 of the motor 5.

  As shown in FIG. 35A, the fan cover 7 </ b> B is disposed in the vicinity of the lower end (pump side end) of the motor 5 and has a shape surrounding the entire cooling fan 8 and the lower end of the motor 5. A plurality of support bases 14 that support the lower end of the motor 5 are integrally formed on the inner surface of the fan cover 7B. These support bases 14 are arranged at equal intervals around the rotation shaft 10 of the motor 5, whereby a gap is formed between the fan cover 7 </ b> B and the motor 5.

  An air intake hole (gas intake hole) 20 is formed at the bottom of the fan cover 7B. A bracket 19 is integrally formed on the lower surface of the fan cover 7B. The bracket 19 includes a plurality of support columns 19a disposed around the air intake hole 20, and a base 19b integrally connected to the lower ends of the support columns 19a. When the cooling fan 8 is rotated, air flows into the cover 7 from the air intake hole 20, and an air flow (upward flow) is formed in the gap between the cover 7 and the motor 5.

  FIG. 36 is a diagram for explaining the flow of air formed by the rotation of the cooling fan 8. As shown in FIG. 36, the rotation of the cooling fan 8 causes air (gas) to flow into the cover 7 from the air intake hole 20, and an upward flow is formed in the gap between the motor 5 and the cover 7. This air flows between the cooling fins 13 of the motor 5 and between the cooling fins 18 of the inverter 6, thereby cooling the motor 5 and the inverter 6. Thereafter, the air is discharged from the upper end opening of the cover 7. Thus, since the air flow contacts not only the cooling fins 13 of the motor 5 but also the cooling fins 18 of the inverter 6, the motor 5 and the inverter 6 can be efficiently cooled.

  Since the cooling fan 8 is disposed between the motor 5 and the pump 1, the upper end (the non-pump side end) of the rotating shaft 10 of the motor 5 can be positioned inside the motor 5. That is, since the cooling fan 8 is not disposed above the motor 5, it is not necessary to pass the rotating shaft 10 through the upper wall of the motor 5. Therefore, rain and dust are prevented from entering the inside of the motor 5, and a motor assembly suitable for outdoor use is provided.

  During the operation of the motor assembly 2, noise is generated from the motor 5 and the cooling fan 8. Therefore, in order to reduce such noise, it is preferable to attach a sound absorbing material or a damping material to the inner surface of the cover 7 as shown in FIGS. 37 (a) and 37 (b) (FIG. 37 (a)). In FIG. 37 (b), the sound absorbing material or damping material is represented by reference numeral 23). Examples of the sound absorbing material include sponge and urethane foam. More preferably, a silencer is used as the sound absorbing material. Examples of the damping material include a rubber plate and a plastic plate.

  Next, still another embodiment of the present invention will be described. FIG. 38 (a) is a side view showing a pump device including a motor assembly according to an embodiment of the present invention, and FIG. 38 (b) is a partial sectional view of the pump device of FIG. 38 (a). . FIG. 39A is a top view showing the motor assembly of this embodiment, FIG. 39B is a side view showing the motor assembly, and FIG. 39C is shown in FIG. It is a figure which shows a state without the inverter 6 when a motor assembly is seen from the direction of arrow O. In FIG. 39B, the cover 7 is indicated by an imaginary line. 40A is a side view of the motor cover 7A, FIG. 40B is a view of the motor cover 7A of FIG. 40A viewed from the direction of the arrow P, and FIG. 40C is FIG. It is a bottom view of a). Note that the configuration of the present embodiment that is not particularly described is the same as that of the above-described embodiment, and thus redundant description thereof is omitted.

  The cover 7 has a shape that covers a part of the motor 5 and the cooling fan 8. More specifically, the motor cover 7 </ b> A has a shape that covers the lower half of the side surface of the motor 5. The motor cover 7A has an upper end opening (anti-pump side end) formed obliquely, and a lower end opening (pump side end) connected to the upper end opening of the fan cover 7B. A gap is formed between the motor 5 and the cover 7 as in the above-described embodiment.

  Unlike the above-mentioned embodiment, the cooling fin is not provided in the side surface of the motor 5 covered with the cover 7. FIG. That is, in this embodiment, a plurality of cooling fins 13 are formed on the side surface of the motor 5 that is not covered by the motor cover 7A. The cooling fins 18 of the inverter 6 are close to the outer surface of the motor 5 and are adjacent to the cooling fins 13 of the motor 5.

  A guide member 21 that is inclined along the upper end opening of the motor cover 7 </ b> A is fixed to the side surface of the motor 5. The guide member 21 is composed of an annular plate that is partially cut off, and is inclined upward toward the inverter 6. The guide member 21 is located in a gap between the inner surface of the cover 7 and the outer surface of the motor 5, and is formed so as to close the gap at the upper end of the cover 7.

  FIG. 41 is a view for explaining the flow of air formed by the rotation of the cooling fan 8. As shown in FIG. 41, the rotation of the cooling fan 8 causes air (gas) to flow into the cover 7 from the air intake hole 20, and an upward flow is formed in the gap between the motor 5 and the cover 7. The air flows along the outer surface of the motor 5 toward the guide member 21, and the traveling direction of the air is directed to the inverter 6 by the guide member 21. Then, the air flows between the cooling fins 18 provided at the bottom of the inverter 6, thereby cooling the inverter 6. As described above, the air flow can be concentrated on the inverter 6 by the guide member 21, and further, the heat transfer rate is improved by increasing the flow velocity of the wind, so that the inverter 6 can be effectively cooled.

  According to the above-described embodiment, the air flow formed by the cooling fan 8 can be forcibly directed to the inverter 6, so that the inverter 6 can be quickly cooled. Further, as shown in FIG. 32 (c), the power switching element 15 is in contact with the bottom of the box 17, and the cooling fin 18 is formed on the bottom, so that the cooling efficiency can be further increased.

  Since air from the cooling fan 8 flows along a part of the motor 5, this air flow also contributes to cooling of the motor 5. Further, the motor 5 is cooled by cooling fins 13 formed on the outer surface thereof. Since the heat-resistant temperature of the motor 5 is relatively high, the motor 5 can be sufficiently cooled by the cooling fins 13 and the air flow.

  Here, as shown in FIG. 42, a plurality of guide members 21 may be provided. Further, the guide member 21 can be provided not on the outer surface of the motor 5 but on the inner surface of the cover 7. Even in this case, a plurality of guide members 21 can be provided. Furthermore, a sound absorbing material or a vibration damping material may be attached to the inner surface of the cover 7.

  Next, still another embodiment of the present invention will be described with reference to FIGS. 43 (a) to 43 (d). FIG. 43 (a) is a back view showing the inverter 6 of the motor assembly 2 according to one embodiment of the present invention, FIG. 43 (b) is a bottom view of the inverter 6, and FIG. FIG. 43D is a cross-sectional view of the inverter 6, and FIG. 43D is a bottom view of the motor assembly 2. In FIG. 43 (d), the cover 7 is represented by an imaginary line. The shape of the cover 7 is the same as the shape of the cover 7 according to the embodiment shown in FIGS. 38 (a) and 38 (b). The configuration of this embodiment that is not specifically described is the same as that of the above-described embodiment shown in FIGS. 38 (a) and 38 (b), and therefore redundant description thereof is omitted.

  In this embodiment, the cooling fins 18 are provided only on part of the outer surface of the bottom of the box 17. More specifically, the power switching element 15 is in contact with the inner surface of the box 17, the cooling fin 18 is provided on the outer surface of the box 17, and the power switching element 15 and the cooling fin 18 are located at positions corresponding to each other (opposite positions). )It is in. The installation area of the cooling fin 18 is substantially the same as the contact area between the power switching element 15 and the box 17.

  Further, an auxiliary guide member (second guide member) 22 for concentrating the air guided by the guide member 21 on the cooling fin 18 is provided on the outer surface of the bottom portion of the box 17. The auxiliary guide member 22 is disposed on both sides of the cooling fin 18. Each auxiliary guide member 22 has an inclined portion that is inclined toward an end portion (lower end in this example) of the cooling fin 18.

  According to this embodiment, most of the air sent from the cooling fan 8 can be used for cooling the power switching element 15. Therefore, it is possible to quickly cool the power switching element 15 that generates the largest amount of heat. In this embodiment as well, a sound absorbing material or a vibration damping material may be attached to the inner surface of the cover 7.

  FIG. 44 is a side view showing a pump apparatus including a motor assembly according to still another embodiment of the present invention. 45 (a) is a rear view of the inverter 6 shown in FIG. 44, FIG. 45 (b) is a bottom view of the inverter 6, and FIG. 45 (c) is a sectional view of the inverter 6. In FIG. 44, a cross section of the cover 7 is shown. The shape of the cover 7 is the same as the shape of the cover 7 according to the embodiment shown in FIGS. 38 (a) and 38 (b). The configuration of this embodiment that is not specifically described is the same as that of the above-described embodiment shown in FIGS. 38 (a) and 38 (b), and therefore redundant description thereof is omitted.

  A cooling jacket 24 is fixed to the inverter 6. The cooling jacket 24 is connected to the pump 1 via an inflow line 25 and an outflow line 26 through which liquid flows. The end of the inflow line 25 is connected to the discharge side flow path of the pump 1, and the end of the outflow line 26 is connected to the suction side flow path of the pump 1. When the pump 1 is driven, a differential pressure is generated between the discharge-side flow path and the suction-side flow path of the pump 1, and part of the liquid transferred to the pump 1 passes through the inflow line 25 due to this differential pressure. And then flows into the cooling jacket 24, passes through the cooling jacket 24, and returns to the pump 1 through the outflow line 26.

  The location where the cooling jacket 24 is attached is the same as the location where the cooling fins 18 shown in FIG. 43 are provided. That is, the power switching element 15 is in contact with the inner surface of the box 17, the cooling jacket 24 is in contact with the outer surface of the box 17, and the power switching element 15 and the cooling jacket 24 are in positions corresponding to each other (opposite positions).

  Usually, the liquid transferred by the pump 1 has a temperature lower than the temperature of the inverter 6. Therefore, while the liquid passes through the cooling jacket 24, heat exchange is performed between the inverter 6 and the liquid, thereby cooling the inverter 6. Cooling fins 18 are provided on the outer surface of the bottom portion of the box 17 of the inverter 6 except for the portion where the cooling jacket 24 is attached. Accordingly, the entire inverter 6 is cooled by the air sent by the cooling fan 8. As described above, the entire inverter 6 can be cooled by the cooling fins 18 while the power switching element 15 is cooled by the cooling jacket 24, so that the inverter 6 can be cooled more efficiently. In this embodiment as well, a sound absorbing material or a vibration damping material may be attached to the inner surface of the cover 7.

  FIG. 46 is a side view showing a pump device including a motor assembly according to still another embodiment of the present invention. In this embodiment, the cooling jacket shown in FIG. 44 is applied to the motor assembly shown in FIGS. 30 (a) and 30 (b). The inverter 6 of this embodiment has the same configuration as the inverter shown in FIGS. 45 (a) to 45 (c). Also in this example, the inverter 6 can be efficiently cooled by the air from the cooling fan 8 and the liquid from the pump 1.

  Next, still another embodiment of the present invention will be described with reference to the drawings. FIG. 47 is a longitudinal sectional view showing a pump device including a motor assembly according to an embodiment of the present invention. The pump device includes a pump 1 that transfers liquid and a motor assembly 2 that drives the pump 1. The motor assembly 2 includes a motor 5 connected to the pump 1, an inverter 6 that controls the rotational speed of the motor 5, a motor cover 7 that covers the motor 5, and a heat shield cover 41 that covers the inverter 6. .

  FIG. 48A is a top view showing the motor assembly 2, and FIG. 48B is a side view showing the motor assembly 2. FIG. 48C is a view of the motor 5 and the heat shield cover 41 shown in FIG. 48A and 48B, the motor cover 7 and the heat shield cover 41 are indicated by imaginary lines.

  The motor cover 7 has a shape that covers the cooling fan 8 and the upper part of the motor 5, and a gap is formed between the outer surface of the motor 5 and the inner surface of the motor cover 7. A plurality of cooling fins 13 are formed on the entire side surface of the motor 5. An air intake hole (described later) is formed in the upper portion of the motor cover 7, and the air flow is formed in the gap between the motor cover 7 and the motor 5 by rotating the cooling fan 8. ing. This air flow cools the motor 5 through the gaps between the cooling fins 13. Furthermore, this air flow also contacts the cooling fins 18 of the inverter 6, thereby cooling the inverter 6. A fan mechanism 4 shown in FIG. 3C is arranged inside the inverter 6. The configurations of the inverter 6 and the fan mechanism 4 are the same as those shown in FIGS. 3 (a) to 3 (c).

  The heat shield cover 41 has a box shape that covers the upper half of the inverter 6. Louvers 42 are provided on the side wall and the front wall of the shielding cover 41. These louvers 42 can improve the ventilation of the shielding cover 41 while shielding direct sunlight and rain. The surface of the heat insulating cover 41 is coated with a heat insulating coating, and the heat insulating property of the heat insulating cover 41 is enhanced. The thermal barrier paint is a paint having a high reflectance and a high thermal emissivity, and a commercially available thermal barrier paint can be used. The temperature increase of the inverter 6 can be suppressed by the heat insulating cover 41 having high heat insulating properties and high air permeability.

  49 (a) is a view of the motor cover 7 as viewed from below, and FIG. 49 (b) is a view of the motor cover 7 of FIG. 49 (a) as viewed from the direction of the arrow R. FIG. FIG. 50 is a sectional view taken along line SS of FIG. A first opening 7 a serving as an air intake hole (gas intake hole) for the cooling fan 8 is formed in the upper part (end portion on the side opposite to the pump) of the motor cover 7. The lower end (pump side end) of the motor cover 7 is opened, and constitutes a second opening 7b. A sound absorbing material or a vibration damping material may be attached to the inner surface of the motor cover 7.

  FIG. 50 is a view showing an example in which the cooling jacket shown in FIGS. 11 and 12A to 12C is incorporated in the pump device shown in FIG. As shown in FIG. 50, the inverter 6 can be cooled more efficiently by combining the water cooling jacket 24 and the heat shield cover 41.

  Next, still another embodiment of the present invention will be described with reference to the drawings. FIG. 51 is a longitudinal sectional view showing a pump device including a motor assembly according to an embodiment of the present invention. The pump device includes a pump 1 that transfers liquid and a motor assembly 2 that drives the pump 1. The motor assembly 2 includes a motor 5 connected to the pump 1, an inverter 6 that controls the rotational speed of the motor 5, a motor cover 7 that covers the side surface of the motor 5, and a heat shield cover that covers the inverter 6 and the motor cover 7. 41. The motor cover 7 is connected to the motor 5 by a support member (not shown).

  A bracket 19 is disposed between the pump 1 and the motor assembly 2, and the pump 1 and the motor assembly 2 are fixed to each other via the bracket 19. The pump 1 is connected to the motor assembly 2 through a rotating shaft 10. A cooling fan 8 is disposed above the motor 5 (on the side opposite to the pump), and the cooling fan 8 is attached to the rotating shaft 10 of the motor 5. Therefore, the cooling fan 8 rotates integrally with the rotating shaft 10 of the motor 5. The inverter 6, the cooling fan 8 and the motor 5 are arranged on the same axis, and the cooling fan 8 is arranged between the inverter 6 and the motor 5.

  The motor 5 and the cooling fan 8 are surrounded by a motor cover 7. That is, the motor cover 7 has a shape that covers the entire side surface of the motor 5, and further covers the entire cooling fan 8. A gap is formed between the inner surface of the motor cover 7 and the side surface of the motor 5. Cooling fins 13 are provided on the side surface of the motor 5, and these cooling fins 13 are disposed between the inner surface of the motor cover 7 and the side surface of the motor 5. A sound absorbing material 23 is attached to the inner surface of the motor cover 7. The sound absorbing material 23 is disposed so as to surround the side surface of the motor 5. A vibration damping material may be attached instead of the sound absorbing material.

  FIG. 52A is an enlarged cross-sectional view showing a part of the motor assembly shown in FIG. FIG. 52B is a plan view showing the positional relationship between the cooling fins of the inverter and the air intake holes. As shown in FIG. 52 (a), a first opening 7a as an air intake hole is formed at the upper end (the end on the side opposite to the pump) of the motor cover 7. The first opening 7 a is located between the inverter 6 and the cooling fan 8.

  The inverter 6 includes a power switching element 15, a control board 16 that controls the operation of the power switching element 15, and a box 17 that houses the power switching element 15 and the control board 16. The power switching element 15 is fixed to the box 17 in contact with the inner surface of the bottom of the box 17. The bottom of the inverter 6 faces the motor 5, and cooling fins 18 that protrude toward the motor 5 are provided on the entire outer surface of the bottom. These cooling fins 18 are in contact with the upper part of the motor cover 7 and are arranged so as to cover the first opening 7a as shown in FIG.

  A fan mechanism 4 for agitating the air inside the inverter 6 is arranged inside the inverter 6. The fan mechanism 4 is disposed in the vicinity of the power switching element 15. The fan mechanism 4 includes a fan 4A and a motor 4B that rotates the fan 4A. The installation position of the fan mechanism 4 is not particularly limited as long as the air inside the inverter 6 can be stirred.

  As shown in FIG. 51, the lower end (pump side end) of the motor cover 7 is open, and constitutes a second opening 7b. The heat shield cover 41 has a shape that covers most of the motor cover 7 and the entire inverter 6. A louver 42 is provided on the side wall of the shielding cover 41. The surface of the heat insulating cover 41 is coated with a heat insulating coating, and the heat insulating property of the heat insulating cover 41 is enhanced. A gap is formed between the motor cover 7 and the heat shield cover 41, and a gap is also formed between the inverter 6 and the heat shield cover 41. The heat shield cover 41 is connected to the motor cover 7 by a support member (not shown). The lower end (pump side end) of the heat shield cover 41 is open.

  53 (a) and 53 (b) are diagrams for explaining the flow of air formed by the rotation of the cooling fan. As shown in FIG. 53A, when the cooling fan 8 is rotated, air (ambient gas) passes through the gap between the heat shield cover 41 and the motor cover 7, and the first opening 7 a of the motor cover 7. Into the motor cover 7. When air flows into the first opening 7a, the air flow comes into contact with the cooling fins 18 of the inverter 6, and thereby the inverter 6 is cooled. The air further flows toward the pump 1 through a gap between the motor cover 7 and the motor 5. At this time, the air flow comes into contact with the cooling fins 13 of the motor 5, thereby cooling the motor 5. Thereafter, the air is discharged to the outside from the second opening 7 b of the motor cover 7.

  On the other hand, when the cooling fan 8 is rotated in the reverse direction, air flows into the motor cover 7 from the second opening 7b of the motor cover 7 as shown in FIG. It flows toward the inverter 6 through the gap therebetween. The air flows out from the first opening 7 a of the motor cover 7 and contacts the cooling fins 18 of the inverter 6. Thereafter, the air passes through the gap between the motor cover 7 and the heat shield cover 41 and is discharged to the outside from the lower end opening of the heat shield cover 41 and the louver 42. Thus, even if the cooling fan 8 is rotated in any direction, an air flow that contacts the cooling fins 13 and 18 is formed, so that the inverter 6 and the motor 5 can be cooled.

  Since the heat shield cover 41 covers the inverter 6 completely, the inverter 6 can be protected from direct sunlight. Therefore, it is possible to prevent the inverter 6 from becoming excessively hot. In order to enhance the heat resistance effect, a thermal barrier coating is applied to the outer surface of the thermal barrier cover 41. Moreover, since the inverter 6 can be protected from rain by the heat shield cover 41, the failure of the inverter 6 can be reduced. Furthermore, since the motor 5 is covered with the motor cover 7, the motor 5 can be protected from rain and sunlight, and weather resistance is improved.

  54 (a) and 54 (b) are partial enlarged views showing a modification of the motor assembly of this embodiment. In this example, the cooling fins 18 are provided only on part of the outer surface of the bottom of the box 17. More specifically, the power switching element 15 is in contact with the inner surface of the box 17, the cooling fin 18 is provided on the outer surface of the box 17, and the power switching element 15 and the cooling fin 18 are located at positions corresponding to each other (opposite positions). )It is in. The installation area of the cooling fin 18 is substantially the same as the contact area between the power switching element 15 and the box 17.

  Also in this example, the cooling fin 18 is arrange | positioned so that the 1st opening part 7a of the motor cover 7 may be covered. Accordingly, the rotation of the cooling fan 8 causes the air flow to concentrate on the cooling fins 18, and the wind hits the cooling fins 18 intensively, and the heat flow is improved and the cooling is promoted by increasing the flow velocity of the wind. . Therefore, the power switching element 15 that generates the largest amount of heat can be efficiently cooled.

  Next, still another embodiment of the present invention will be described. In addition, since the structure of this embodiment which is not demonstrated in particular is the same as that of embodiment mentioned above, the overlapping description is abbreviate | omitted. FIG. 55 (a) is a longitudinal sectional view showing a pump device including a motor assembly according to an embodiment of the present invention, and FIG. 55 (b) is a part of the motor assembly shown in FIG. 55 (a). FIG.

  The inverter 6 is disposed so as to close the first opening 7 a of the motor cover 7. The inverter 6 is formed with a through hole 6b that communicates the internal space of the motor cover 7 with the external space. In the present embodiment, the through hole 6b functions as an air intake hole or an air discharge hole. The bottom surface (outer surface of the bottom portion) of the inverter 6 is located inside the motor cover 7, and cooling fins 18 are provided on the entire bottom surface as in the above-described embodiment. These cooling fins 18 are close to the cooling fan 8.

  56 (a) and 56 (b) are diagrams for explaining the flow of air formed by the rotation of the cooling fan. As shown in FIG. 56 (a), when the cooling fan 8 is rotated, the air flows through the through hole 6b of the inverter 6 and contacts the cooling fin 18, whereby the inverter 6 is cooled. The air flow contacts the cooling fins 13 of the motor 5 to cool the motor 5.

  On the other hand, when the cooling fan 8 is rotated in the reverse direction, as shown in FIG. 56B, air flows into the motor cover 7 from the second opening 7b, contacts the cooling fins 13 and 18, and then the inverter 6 It is discharged from the through hole 6b. Thus, even if the cooling fan 8 is rotated in any direction, an air flow that contacts the cooling fins 13 and 18 is formed, so that the inverter 6 and the motor 5 can be cooled.

  Next, still another embodiment of the present invention will be described. Note that the configuration of the present embodiment that is not specifically described is the same as that of the embodiment shown in FIGS. 55A and 55B, and thus redundant description thereof is omitted. FIG. 57 (a) is a longitudinal sectional view showing a pump device provided with a motor assembly according to an embodiment of the present invention, and FIG. 57 (b) is a part of the motor assembly shown in FIG. 57 (a). FIG.

  The inverter 6 is disposed between the cooling fan 8 and the motor 5. That is, the cooling fan 8 is disposed outside the motor cover 7 and inside the heat shield cover 41. The inverter 6 is disposed so as to close the first opening 7 a of the motor cover 7. The inverter 6 is formed with a through hole 6 b that communicates the internal space of the motor cover 7 with the external space. The bottom surface of the inverter 6 is located inside the motor cover 7, and cooling fins 18 are provided on the entire bottom surface. These cooling fins 18 are arranged close to the top of the motor 5. The rotating shaft 10 extends through the through hole 6 b of the inverter 6, and the cooling fan 8 is connected to the end of the rotating shaft 10.

  58 (a) and 58 (b) are diagrams for explaining the flow of air formed by the rotation of the cooling fan. As shown in FIG. 58 (a) and FIG. 58 (b), the flow of air contacting the cooling fins 13 and 18 is formed regardless of the direction of rotation of the cooling fan 8, so that the inverter 6 and the motor 5 can be cooled.

  Next, still another embodiment of the present invention will be described. FIG. 59 (a) is a longitudinal sectional view showing a pump device including a motor assembly according to an embodiment of the present invention, and FIG. 59 (b) is a part of the motor assembly shown in FIG. 59 (a). FIG. The configuration of the present embodiment that is not specifically described is the same as that of the embodiment shown in FIG.

  A cooling jacket 24 is fixed to the inverter 6. The cooling jacket 24 is connected to the pump 1 via an inflow line (liquid supply line) 25 and an outflow line (liquid return line) 26 through which liquid flows. The end of the inflow line 25 is connected to the discharge side flow path of the pump 1, and the end of the outflow line 26 is connected to the suction side flow path of the pump 1. When the pump 1 is driven, a differential pressure is generated between the discharge-side flow path and the suction-side flow path of the pump 1, and part of the liquid transferred to the pump 1 passes through the inflow line 25 due to this differential pressure. And then flows into the cooling jacket 24, passes through the cooling jacket 24, and returns to the pump 1 through the outflow line 26.

  The cooling jacket 24 is attached to the outer surface located on the opposite side to the inner surface of the box 17 with which the power switching element 15 contacts. That is, the power switching element 15 is in contact with the inner surface of the box 17, the cooling jacket 24 is in contact with the outer surface of the box 17, and the power switching element 15 and the cooling jacket 24 are in positions corresponding to each other (opposite positions).

  Usually, the liquid transferred by the pump 1 has a temperature lower than the temperature of the inverter 6. Therefore, while the liquid passes through the cooling jacket 24, heat exchange is performed between the inverter 6 and the liquid, thereby cooling the inverter 6. Further, the air flow formed by the rotation of the cooling fan 8 contacts the cooling jacket 24 and cools the cooling jacket 24. Therefore, the inverter 6 can be cooled more efficiently.

  FIG. 60A is a longitudinal sectional view showing a modification of the above embodiment, and FIG. 60B is a plan view showing the positional relationship between the cooling fin and the first opening shown in FIG. It is. In this example, the cooling fin 18 is provided on the outer surface of the bottom of the box 17 of the inverter 6 except for the portion where the cooling jacket 24 is attached. The cooling jacket 24 is the same as that shown in FIGS. 59 (a) and 59 (b). The cooling fin 18 is disposed so as to close the first opening 7 a of the motor cover 7. According to this configuration example, the entire inverter 6 can be cooled by the air sent by the cooling fan 8, and at the same time, the power switching element 15 can be cooled by the cooling jacket 24.

  Next, still another embodiment of the present invention will be described. FIG. 61 is a longitudinal sectional view showing a pump device including a motor assembly according to an embodiment of the present invention. 62 (a) and 62 (b) are enlarged sectional views schematically showing a part of the motor assembly shown in FIG. The configuration of the present embodiment that is not specifically described is the same as that of the embodiment shown in FIG.

  In this embodiment, the cooling fan 8 is disposed between the motor 5 and the pump 1. That is, the cooling fan 8 is disposed on the pump side of the motor 5 and is fixed to the rotating shaft 10. The cooling fins 18 of the inverter 6 are arranged so as to cover the first opening 7 a of the motor cover 7. The cooling fan 8 is disposed inside the motor cover 7, and the second opening 7 b of the motor cover 7 is located below the cooling fan 8. A bracket 19 is fixed to the lower portion of the motor cover 7.

  When the cooling fan 8 is rotated, air is taken in from the second opening 7 b and the air flows toward the inverter 6 through the gap between the motor 5 and the motor cover 7. At this time, the air flow contacts the cooling fins 13, thereby cooling the motor 5. The air flows out from the first opening 7 a and contacts the cooling fins 18 of the inverter 6, thereby cooling the inverter 6. Further, the air flows between the motor cover 7 and the heat shield cover 41 and is discharged to the outside through the lower end opening of the heat shield cover 41 and the louver 42.

  The pump device described above is a so-called vertical pump device in which the rotation shaft of the pump extends in the vertical direction. This type of pump device has the advantage of a smaller footprint and footprint. However, the present invention is not limited to this and may be a horizontally installed pump device.

  The embodiment described above is described for the purpose of enabling the person having ordinary knowledge in the technical field to which the present invention belongs to implement the present invention. Various modifications of the above embodiment can be naturally made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. Therefore, the present invention should not be limited to the described embodiments, but should be the widest scope according to the technical idea defined by the claims.

DESCRIPTION OF SYMBOLS 1 Pump 2 Motor assembly 5 Motor 4 Fan mechanism 6 Inverter 7 Cover 8 Cooling fan 10 Rotating shaft 13 Cooling fin 15 Power switching element 16 Control board 18 Cooling fin 21 Guide member 23 Sound absorbing material or damping material 24 Cooling jacket 25 Inflow line 26 Outflow line 41 Thermal barrier cover

Claims (37)

A motor coupled to the pump;
An inverter fixed to the side of the motor and having cooling fins;
A fan mechanism disposed inside the inverter and stirring the gas inside the inverter;
A cooling fan attached to the rotating shaft of the motor and disposed on the non-pump side of the motor;
A cover that covers at least a part of the motor and the cooling fan, and is arranged with a gap through the motor;
Comprising at least one guide member disposed in a gap between the motor and the cover;
The motor assembly according to claim 1, wherein the guide member has a shape for guiding the gas from the cooling fan to the cooling fins of the inverter. The inverter includes a power switching element and a box that houses the power switching element,
The power switching element is in contact with the inner surface of the box;
2. The motor assembly according to claim 1, wherein the cooling fin is provided on an outer surface located opposite to an inner surface of the box with which the power switching element contacts.   The motor assembly according to claim 1, further comprising an auxiliary guide member that concentrates the gas guided by the guide member on the cooling fin. The inverter includes a power switching element and a box that houses the power switching element,
The power switching element is in contact with the inner surface of the box;
2. The motor set according to claim 1, wherein a cooling jacket through which a liquid supplied from the pump flows is attached to an outer surface located opposite to an inner surface of the box with which the power switching element contacts. Solid.   The motor assembly according to claim 1, wherein a sound absorbing material or a vibration damping material is attached to an inner surface of the cover.   The motor assembly according to claim 1, wherein a cooling fin is provided on a side surface of the motor not covered with the cover. A second cooling fan attached to the rotating shaft and disposed on the pump side of the motor;
A fan cover surrounding the second cooling fan,
2. The motor assembly according to claim 1, wherein the fan cover has a shape that forms a gas flow from the second cooling fan toward the guide member along a side surface of the motor. A motor assembly according to any one of claims 1 to 7;
And a pump connected to the motor assembly. A pump,
A motor coupled to the pump;
A cooling fan attached to the rotating shaft of the motor and disposed on the non-pump side of the motor;
A cover covering the motor, the cooling fan, and the pump;
A pump device comprising a sound absorbing material or a damping material attached to an inner surface of the cover.   The pump device according to claim 9, wherein the sound absorbing material or the damping material has a shape that covers a side surface of the motor.   The pump device according to claim 9, wherein the sound absorbing material has a silencer structure.   The cooling fans are a first axial fan and a second axial fan prepared in advance, and the first axial fan and the second axial fan flow gas in the same rotational direction. The pump device according to claim 9, wherein the pump devices have different blade angles so that the directions are opposite to each other.   The pump device according to claim 9, wherein the cooling fan is configured such that the blade angle is variable so that the gas flow direction can be reversed in the same rotation direction. The operation method of the pump device according to claim 12,
When the ambient temperature around the pump device is lower than the temperature of the liquid transferred by the pump device, the first axial fan is used to cover the gas flow from the motor toward the pump. Formed in and
When the ambient temperature around the pump device is higher than the temperature of the liquid, the gas flow from the pump toward the motor is formed in the cover using the second axial fan. And how to. The operation method of the pump device according to claim 13,
When the ambient temperature around the pump device is lower than the temperature of the liquid transferred by the pump device, the cooling fan forms the gas flow from the motor toward the pump in the cover,
When the ambient temperature around the pump device is higher than the temperature of the liquid, the cooling fan forms the gas flow from the pump toward the motor in the cover. A motor coupled to the pump;
An inverter fixed to the side of the motor and having cooling fins;
A fan mechanism disposed inside the inverter and stirring the gas inside the inverter;
A cooling fan attached to the rotating shaft of the motor;
A heat exchanger disposed in the vicinity of the cooling fan;
A liquid supply line for guiding the liquid pressurized by the pump to the heat exchanger;
A liquid return line for returning liquid led to the heat exchanger to the pump;
Covering at least a part of the motor and the cooling fan, the motor and a cover disposed via a gap,
The heat exchanger is configured to exchange heat between the airflow generated by the cooling fan and the liquid from the pump,
The motor assembly according to claim 1, wherein the liquid return line extends through the inverter. Further comprising at least one guide member disposed in a gap between the motor and the cover;
The motor assembly according to claim 16, wherein the guide member has a shape that guides gas from the cooling fan to a cooling fin of the inverter.   The motor assembly according to claim 16, wherein a sound absorbing material or a damping material is attached to an inner surface of the cover. A motor assembly according to any one of claims 16 to 18,
And a pump connected to the motor assembly. A motor coupled to the pump;
An inverter fixed to the side of the motor and having cooling fins;
A fan mechanism disposed inside the inverter and stirring the gas inside the inverter;
A cooling fan disposed on the pump side of the motor and attached to the rotating shaft of the motor;
Covering at least a part of the motor and the cooling fan, the motor and a cover disposed via a gap,
At least a part of the cooling fin of the inverter is disposed in proximity to the motor. Further comprising at least one guide member disposed in a gap between the motor and the cover;
21. The motor assembly according to claim 20, wherein the guide member has a shape that guides gas from the cooling fan to a cooling fin of the inverter.   The motor assembly according to claim 21, further comprising an auxiliary guide member that concentrates the gas guided by the guide member on the cooling fin. The inverter includes a power switching element and a box that houses the power switching element,
The power switching element is in contact with the inner surface of the box;
21. The motor assembly according to claim 20, wherein the cooling fin is provided on an outer surface located opposite to an inner surface of the box with which the power switching element contacts. The inverter includes a power switching element and a box that houses the power switching element,
The power switching element is in contact with the inner surface of the box;
21. The motor set according to claim 20, wherein a cooling jacket through which a liquid supplied from the pump flows is attached to an outer surface located opposite to an inner surface of the box with which the power switching element contacts. Solid.   21. The motor assembly according to claim 20, wherein a sound absorbing material or a vibration damping material is attached to an inner surface of the cover. A motor assembly according to any one of claims 20 to 25;
And a pump connected to the motor assembly. A motor coupled to the pump;
An inverter;
A fan mechanism disposed inside the inverter and stirring the gas inside the inverter;
A cooling fan attached to the rotating shaft of the motor;
A motor cover covering a side surface of the motor;
A heat shield covering at least the inverter,
The motor cover has a first opening formed at an end portion opposite to the pump and a second opening formed at an end portion on the pump side,
A motor assembly, wherein a wall of the heat insulating cover is provided with a louver.   28. The motor assembly according to claim 27, wherein a thermal barrier coating is applied to a surface of the thermal barrier cover. The inverter is disposed on the non-pump side of the motor;
28. The motor assembly according to claim 27, wherein the heat shield cover covers the inverter and the motor cover. The cooling fan is disposed between the inverter and the motor;
The motor and the cooling fan are covered by the motor cover,
The inverter has cooling fins protruding toward the motor,
30. The motor assembly according to claim 29, wherein the cooling fin is in contact with the motor cover so as to cover the first opening. The cooling fan is disposed between the inverter and the motor;
The motor and the cooling fan are covered by the motor cover,
The inverter has cooling fins protruding toward the motor,
The inverter is arranged to seal the first opening;
30. The motor assembly according to claim 29, wherein the inverter has a through hole that communicates an internal space and an external space of the motor cover. The inverter is disposed between the cooling fan and the motor;
The inverter is arranged to seal the first opening;
30. The motor assembly according to claim 29, wherein the inverter has a through hole that communicates an internal space and an external space of the motor cover. The cooling fan is disposed on the pump side of the motor,
The inverter has cooling fins protruding toward the motor,
30. The motor assembly according to claim 29, wherein the cooling fin is in contact with the motor cover so as to cover the first opening. The inverter includes a power switching element and a box that houses the power switching element,
The power switching element is in contact with the inner surface of the box;
28. The motor assembly according to claim 27, wherein the cooling fin is provided on an outer surface located opposite to an inner surface of the box with which the power switching element contacts. The inverter includes a power switching element and a box that houses the power switching element,
The power switching element is in contact with the inner surface of the box;
28. The motor set according to claim 27, wherein a cooling jacket through which a liquid supplied from the pump flows is attached to an outer surface located opposite to an inner surface of the box with which the power switching element contacts. Solid.   28. The motor assembly according to claim 27, wherein a sound absorbing material or a vibration damping material is attached to an inner surface of the motor cover. A motor assembly according to any one of claims 27 to 36;
And a pump connected to the motor assembly.

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