Water supply system

Abstract

To provide a water supply system that can effectively cool components inside a housing and achieve miniaturization.SOLUTION: A water supply system 1 includes a cooling fan 105 for cooling a driver 120 and then forming an air flow to cool a reactor 130.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a water supply device. [Background technology]

[0002] A water supply device is known that includes a control panel that houses a control device and an inverter case that houses an inverter device (see, for example, Patent Document 1). In such a water supply device, the control panel and the inverter case are located in different locations. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-115888 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-211129 [Patent Document 3] Japanese Patent Application Publication No. 2018-145873 [Patent Document 4] Patent Publication No. 2021-25479 Summary of the Invention [Problem to be solved by the invention]

[0004] If the control panel and the inverter case are located in different places, the overall size of the water supply device will be large. Therefore, in order to achieve a smaller water supply device, it is possible to integrate the control panel and the inverter case.

[0005] However, in this case, the components that are heat sources for the control device and the inverter device are mixed in the same housing. In particular, if the driver and reactor, which are the main heat sources, are placed in the same housing, the temperature inside the entire housing will rise.

[0006] Furthermore, the driver has a relatively low temperature tolerance level. Therefore, in order to reduce the size of the housing, if the driver and the reactor are arranged close to each other, the temperature of the driver may increase due to the heat generated by the reactor, and in the worst case, the driver may malfunction.

[0007] Therefore, an object of the present invention is to provide a water supply device that can effectively cool the components inside the housing and achieve miniaturization.

Means for Solving the Problems

[0008] In one aspect, a water supply device is provided. The water supply device includes a pump device, a driver as a component of an inverter device for driving the pump device, a reactor different from the components of the inverter device, a housing for housing the driver and the reactor adjacent to each other, and a cooling fan for cooling the driver and then forming an air flow for cooling the reactor.

[0009] In one aspect, the water supply device includes a heat sink attached to the lower surface of the driver. The housing has an opening disposed opposite to the heat sink, and the cooling fan faces the heat sink through the opening. In one aspect, the heat sink is disposed with a gap from the bottom of the housing.

[0010] In one aspect, the heat sink has a plurality of fins inclined toward the reactor, and the cooling fan faces the plurality of fins through the opening. In one aspect, the housing has ventilation holes formed in its upper part.

Advantages of the Invention

[0011] The cooling fan can preferentially cool a driver with low heat resistance and can cool a reactor adjacent to the driver all at once. With such a configuration, the components inside the housing can be effectively cooled. Therefore, the water supply device can achieve its miniaturization.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings described below, the same or corresponding components are denoted by the same reference numerals, and redundant descriptions are omitted. In the following plurality of embodiments, the configuration of one embodiment not particularly described is the same as that of other embodiments, so the redundant descriptions thereof are omitted.

[0014] FIG. 1 is a schematic diagram showing an embodiment of the water supply device. As shown in FIG. 1, the water supply device 1 is a device used for supplying water to buildings such as office buildings and apartment houses, and is connected to a supply source (not shown) such as a main water pipe or a water receiving tank via an introduction pipe 5.

[0015] The water supply device 1 includes a pump device and a backflow prevention device 15 arranged on the suction side of the pump device. The pump device is a combination of a pump 2 and a motor 3. The water supply device 1 includes a plurality of (two in this embodiment) pumps 2 and a plurality of (two in this embodiment) motors 3. The number of pumps 2 and the number of motors 3 are not limited to this embodiment. The components of the water supply device 1 are housed in a cabinet 30.

[0016] The water supply device 1 includes a suction pipe 10 connected to the suction port of the pump 2 and a discharge pipe 8 connected to the discharge port of the pump 2. The suction pipe 10 includes a suction connection pipe 9 connecting the introduction pipe 5 and the backflow prevention device 15 and a suction header pipe 18 connecting the backflow prevention device 15 and the pump 2. A pipe silencer 13 for suppressing the propagation of the vibration of the pump device is connected to the introduction pipe 5.

[0017] The discharge pipe 8 includes a discharge connection pipe 27 connected to the discharge port of each pump 2 and a discharge collecting pipe 34 connected to the discharge connection pipe 27. The discharge collecting pipe 34 is connected to a water distribution pipe 7. The water distribution pipe 7 is connected to a water supply fixture (e.g., a faucet) arranged inside the building.

[0018] The water supply device 1 includes a pressure tank 28 for storing a part of the conveyance liquid pressurized by the pump 2 and a flow rate detector (not shown) connected to the discharge pipe 8. When the operation of the pump device is stopped, the pressure in the water distribution pipe 7 is maintained by the pressure tank 28. The flow rate detector is a device for detecting that the flow rate of the conveyance liquid is equal to or less than a predetermined small water volume (i.e., a small water volume state).

[0019] When the flow rate detector detects a small water volume state, after accumulating pressure in the pressure tank 28, the operation of the pump device is stopped (small water volume stop). On the other hand, when the pressure in the discharge pipe 8 drops to a predetermined starting pressure, the operation of the pump device is started.

[0020] The water supply device 1 includes a water leakage receiver 40 disposed below the backflow prevention device 15. The water leakage receiver 40 receives the conveyed liquid leaked from the backflow prevention device 15. The conveyed liquid received by the water leakage receiver 40 is discharged to the outside of the water supply device 1.

[0021] In order to achieve overall miniaturization of the water supply device 1, in the present embodiment, the water supply device 1 includes an electrical equipment unit 21 composed of a control device and an inverter device. However, each of the control device and the inverter device includes a component that serves as a heat source. Therefore, if these components are arranged in proximity to each other, there is a risk that these components will significantly increase in temperature. Thus, the water supply device 1 has a configuration that realizes its miniaturization and effectively cools the components that serve as heat sources. Hereinafter, such a configuration will be described with reference to the drawings.

[0022] FIG. 2 is a diagram showing an embodiment of the electrical equipment unit. FIG. 3 is an enlarged view of FIG. 2. As described above, the electrical equipment unit 21 includes an inverter device for variably driving a pump device (more specifically, a motor 3), and a control device for controlling the operation of the pump device via the inverter device. <P

[0023] As shown in FIG. 2, the inverter device includes a driver 120 as one of its components. The driver 120 is a device that receives a control signal from the control device, converts it into an electrical signal, and controls operations such as the rotation speed of the motor 3. [[ID=*]]

[0024] The control device includes a control board 150 on which an electronic circuit for controlling the motor 3 is mounted as one of its components. In the embodiment shown in FIG. 2, the driver 120 as a main component of the inverter device and the control board 150 as a main component of the control device are provided. However, the inverter device may further include components other than the driver 120, and the control device may further include components other than the control board 150.

[0025] The electrical equipment unit 21 includes a reactor 130 that is different from the components of the inverter device to ensure electrical stability. The reactor 130 is configured to remove high-frequency noise and stabilize the power supply to the motor 3. The driver 120 is a heat source of the inverter device and has low heat resistance. The reactor 130 is also a heat source, but has higher heat resistance than the driver 120.

[0026] The water supply device 1 includes a housing 110 that houses the driver 120 and the reactor 130 adjacent to each other. The housing 110 houses not only the driver 120 and the reactor 130 but also the control board 150.

[0027] The housing 110 has a box shape. More specifically, the housing 110 has a bottom portion 111 disposed opposite to the pump device, a peripheral wall portion 112 surrounding the bottom portion 111, and an upper wall portion 114 connected to the peripheral wall portion 112 and disposed opposite to the bottom portion 111.

[0028] The water supply device 1 includes a heat sink 140 attached to the lower surface of the driver 120, and the housing 110 is disposed opposite to the heat sink 140 and has an opening 113 formed in the bottom portion 111.

[0029] The heat sink 140 includes a base 141 that supports the driver 120 and a plurality of fins 142 extending from the base 141 toward the opening 113. The base 141 has a size larger than the opening 113 and is disposed above the opening 113 by a spacer 145.

[0030] In other words, the heat sink 140 is disposed by forming a gap between the base 141 and the bottom portion 111 by the spacer 145. In this embodiment, by connecting the heat sink 140 to the bottom portion 111 through the spacer 145, at least one of the plurality of fins 142 is inserted into the opening 113.

[0031] The water supply device 1 includes a cooling fan 105 that forms an air flow for cooling the driver 120 and then cooling the reactor 130. The cooling fan 105 is fixed to the rotating shaft 100 of the motor 3 and faces the heat sink 140 (more specifically, a plurality of fins 142) through the opening 113.

[0032] When the motor 3 is driven, the cooling fan 105 rotates together with the rotating shaft 100. The rotating cooling fan 105 sends the surrounding air into the housing 110 through the opening 113.

[0033] FIG. 4 is a diagram showing the air flow for cooling the driver and the reactor. The air sent into the housing 110 first contacts the heat sink 140 facing the cooling fan 105 to cool the driver 120. By bringing most of the air sent by the cooling fan 105 (more specifically, the non-heated air) into contact with the heat sink 140, the driver 120 can be efficiently cooled.

[0034] The air that has cooled the driver 120 contacts the base 141 of the heat sink 140 and changes its direction. A part of the air whose direction has changed flows toward the reactor 130 through the gap formed between the base 141 and the bottom 111. The air flowing toward the reactor 130 contacts the reactor 130 and cools the reactor 130. The air that has cooled the reactor 130 further flows toward the control board 150 and cools the control board 150.

[0035] In this way, the driver 120 and the reactor 130 are arranged in this order in the air flow direction. Therefore, the cooling fan 105 can bring the air sent by its rotation into contact (cool) with the driver 120 and the reactor 130 in this order.

[0036] According to this embodiment, the cooling fan 105 can preferentially cool the driver 120 with low heat resistance and efficiently cool the reactor 130 adjacent to the driver 120 all at once. Therefore, the driver 120 and the reactor 130, which should originally be arranged separately, can be arranged close to each other inside the housing 110. As a result, miniaturization of the water supply device 1 can be achieved.

[0037] The housing 110 has ventilation holes 115 formed in its upper part. The ventilation holes 115 are formed in the upper part of the peripheral wall portion 112 of the housing 110. In one embodiment, the ventilation holes 115 may be formed not only in the upper part of the housing 110 but also in the entire peripheral wall portion 112 extending over the lower part of the housing 110.

[0038] Through the opening 113, the air sent into the housing 110 cools the components of the electrical equipment unit 21 (particularly, the driver 120, the reactor 130, and the control board 150), and then is discharged to the outside of the housing 110 through the ventilation holes 115.

[0039] In this way, the cooling fan 105 can form a circulating flow of air between the outside and the inside of the housing 110. Therefore, the cooling fan 105 can lower the overall ambient temperature inside the housing 110.

[0040] FIG. 5 is a diagram showing a plurality of fins inclined toward the reactor. As shown in FIG. 5, the plurality of fins 142 are inclined toward the reactor 130 as a whole. Therefore, the plurality of fins 142 can change the direction of the air sent by the cooling fan 105 and efficiently bring the air into contact with the reactor 130.

[0041] In this way, the air sent by the cooling fan 105 can cool the driver 120 through the heat sink 140 and then contact the reactor 130 intensively without diffusing.

[0042] In the present embodiment, when the opening 113 and the cooling fan 105 are viewed from above, the cooling fan 105 is disposed on the center line CL that crosses the opening 113. In one embodiment, the cooling fan 105 may be disposed offset toward the reactor 130 side from the center line CL. With such an arrangement, the cooling fan 105 can more actively form the air flow toward the reactor 130.

[0043] In the above-described embodiment, the number of heat sinks 140 corresponds to the number of drivers 120. The number of drivers 120 corresponds to the number of motors 3. The number of cooling fans 105 corresponds to the number of motors 3. Therefore, when one motor 3 is provided, one driver 120, one heat sink 140, and one cooling fan 105 are provided.

[0044] The above-described embodiments are described for the purpose of enabling those having ordinary knowledge in the technical field to which the present invention pertains to practice the present invention. Various modifications of the above embodiments 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 is not limited to the described embodiments, but is construed in the broadest scope in accordance with the technical idea defined by the claims.

Explanation of Reference Numerals

[0045] 1 Water supply device 2 Pump 3 Motor 5 Introduction pipe 7 Water distribution pipe 8 Discharge pipe 9 Suction connection pipe 10 Suction pipe 13 Pipe silencer 15 Backflow prevention device 18 Suction header pipe 21 Electrical equipment section 27 Discharge connection pipe 28 Pressure tank 30 Cabinet 34 Discharge manifold pipe 40 Water receiver 100 Rotating shaft 105 Cooling fan 110 Housing 111 Bottom 112 Peripheral wall part 113 Opening 114 Upper wall part 115 Vent hole 120 Driver 130 Reactor 140 Heat sink 141 Base 142 Fin[[ID=2,7]] 145 Spacer 150 Control board CL Center line

Claims

1. A water supply device, a pump device, a driver as a component of an inverter device for driving the pump device, a reactor different from the components of the inverter device, a housing for accommodating the driver and the reactor adjacent to each other, and a cooling fan for cooling the driver and then forming an air flow for cooling the reactor. The water supply device is provided with these components.

2. The water supply device includes a heat sink attached to the lower surface of the driver, the housing has an opening disposed opposite to the heat sink, and the cooling fan faces the heat sink through the opening. The water supply device according to Claim 1.

3. The heat sink is disposed with a gap from the bottom of the housing. The water supply device according to Claim 2.

4. The heat sink has a plurality of fins inclined toward the reactor, and the cooling fan faces the plurality of fins through the opening. The water supply device according to Claim 2.

5. The housing has a vent hole formed in its upper part. The water supply device according to Claim 1.

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