JP7162393B1 - Cold water supply unit with compressed air dehumidifier - Google Patents

Abstract

A unit in which a compressed air dehumidifier (20) and a cold water supply device (30), which commonly use the cooling action of cooling water supplied from a cooling water source (10), are rationally incorporated so as to reduce energy consumption through interaction. become A compressed air dehumidifier (20) having a device housing (23) provided with a compressed air inlet (21) and a compressed air outlet (22), a cooling water pipe (25) for cooling the compressed air, and cooling water supplied from a cooling water source (10). A cold water tank 40 for cold water and a cold water supply device 30 including a cold water pump 31 so as to supply cold water cooled via the cold water heat exchanger 34 to the cold water supply part 80, and compressed air A compressor provided with a reheating channel 50a connected to the outlet channel 24 and arranged adjacent to the pump motor 32 so as to reheat the compressed air cooled by the compressed air dehumidifier 20. An air reheater 50 is provided. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a cold water supply device unit including a compressed air dehumidifier and a cold water supply device that share the cooling action of cooling water supplied from a cooling water source.

A conventional compressed air dehumidifier includes an inlet for introducing compressed air, a cooling unit for cooling the compressed air introduced from the inlet and dehumidifying the compressed air by condensing moisture in the compressed air, and a cooling unit. A dehumidifier body having an exhaust port for exhausting compressed air dehumidified in a dehumidifier body, an evaporator arranged in the cooling part inside the dehumidifier body, and a compressor, condenser and expansion arranged outside the dehumidifier body In a compressed air dehumidifier comprising a valve and a cooling circuit that circulates refrigerant in order of an evaporator, a compressor, a condenser, and an expansion valve, the compressed air exhausted from the exhaust port is replaced by the heat radiation of the cooling circuit. The applicant of the present invention has proposed a reheater (see Patent Document 1).

Conventionally, as a cold water supply device, cold water cooled through a cold water heat exchanger by cooling water supplied from a cooling water source (primary cold water supply device) is supplied to a cooled water supply part (cooled body). A cold water tank (tank) in which the cold water cooled by the cold water heat exchanger is stored, and a cold water pumping pump installed to pump out the cold water stored in the cold water tank (tank) (see Patent Document 2).

Conventionally, there is no cold water supply apparatus with a compressed air dehumidifier that is unitized by arranging both the compressed air dehumidifier and the cold water supply apparatus in one casing or as one package. In recent years, for example, in production plants that manufacture precision products, it is necessary to cool the machine tools with a chiller to maintain a predetermined temperature, or to supply compressed air adjusted to the required temperature and humidity to the machine tools. and achieves high-precision machining. For this reason, both the compressed air dehumidifier and the cold water supply are installed in the same production plant.

JP 2011-005374 A (page 1) Japanese Patent Application Laid-Open No. 5-259676 (Fig. 1)

The problem to be solved with respect to the chilled water supply unit with the compressed air dehumidifier is that conventionally, the compressed air dehumidifier and the chilled water supply commonly use the cooling action of the cooling water supplied from the cooling water source. Even if there is, it is provided separately, and it is not proposed to rationally incorporate and unitize so that energy consumption can be reduced by interaction.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to rationally incorporate a compressed air dehumidifier and a cold water supply device that commonly use the cooling action of cooling water supplied from a cooling water source so that energy consumption can be reduced through interaction. To provide a cold water supply device unit with a compressed air dehumidifier that can be unitized.

The present invention has the following configurations in order to achieve the above object.
According to one embodiment of a cold water supply unit equipped with a compressed air dehumidifier according to the present invention, a pressure vessel provided with a compressed air inlet into which compressed air is introduced and a compressed air outlet through which dehumidified compressed air is discharged. and a pipeline for circulating the cooling water supplied from the cooling water source inside the device housing, and the compressed air arranged to cool the compressed air and condense the moisture in the compressed air A compressed air dehumidifier equipped with a cooling water pipe for cooling, and the cold water cooled by the cooling water supplied from the cooling water source through a cold water heat exchanger so as to be supplied to the cold water supply part. Compressed air comprising a cold water tank in which cold water cooled by the heat exchanger is stored, and a cold water supply device equipped with a cold water pressure pump installed to pump out the cold water stored in the cold water tank A cold water supply device unit including a dehumidifier, which is connected to a compressed air outlet flow path extending from the compressed air outlet, and heats the compressed air by exhaust heat generated from the pump motor of the cold water pumping pump. A compressed air reheater provided with a reheating passage disposed adjacent to the pump motor is provided so as to reheat the compressed air cooled by the compressed air dehumidifier.

Further, according to one aspect of the cold water supply device unit provided with the compressed air dehumidifier according to the present invention, the compressed air reheater is provided in such a manner that the reheating flow path surrounds the pump motor. In addition, the reheater main body may be provided in a form branched by a plurality of branch pipes for heat exchange.

Further, according to one aspect of the cold water supply device unit equipped with the compressed air dehumidifier according to the present invention, the reheater main body is configured such that the plurality of heat exchange branch pipes are arranged from the plurality of heat exchange branch pipes. A straight pipe upstream pipe portion provided upstream of the flow of compressed air and arranged in parallel with the rotating shaft of the pump motor, and a downstream side of the flow of compressed air from the plurality of branch pipes for heat exchange It is characterized in that it is formed in a U-shape and arranged in parallel with a straight pipe-shaped downstream pipe portion that is provided and arranged in parallel with the rotating shaft of the pump motor. be able to.
Further, according to one aspect of the cold water supply device unit including the compressed air dehumidifier according to the present invention, the rotating shaft of the pump motor is arranged to extend in the vertical direction substantially along the vertical direction, and the plurality of The heat exchange branch pipes are arranged in a state of being routed substantially parallel to the horizontal plane.

Further, according to one aspect of the cold water supply device unit equipped with the compressed air dehumidifier according to the present invention, the pump motor is fixed to the upper end portion of the rotation shaft of the pump motor and rotates coaxially to generate a descending air flow. It can be characterized by having a built-in cooling fan that generates a

Further, according to one aspect of the cold water supply unit provided with the compressed air dehumidifier according to the present invention, the compressed air reheater is arranged to surround the pump motor and the reheater main body. It can be characterized by comprising a built-in box provided so as to house the part.
Further, according to one embodiment of the cold water supply device unit equipped with the compressed air dehumidifier according to the present invention, a reheater exhaust fan for ventilating the air inside the built-in box is provided on the wall plate portion constituting the built-in box. It can be characterized as being

Further, according to one embodiment of the cold water supply unit provided with the compressed air dehumidifier according to the present invention, the heat exchange branch pipe is provided by a spiral pipe.

According to the chilled water supply device unit equipped with the compressed air dehumidifier according to the present invention, energy is consumed by interaction between the compressed air dehumidifier and the chilled water supply device, which commonly use the cooling action of the cooling water supplied from the cooling water source. A particularly advantageous effect is that it can be rationally incorporated into a unit so that the

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system configuration diagram schematically showing a configuration example of a cold water supply device unit provided with a compressed air dehumidifier according to the present invention; FIG. 2 is a schematic vertical cross-sectional view seen from the front side for schematically explaining a configuration example of part of a compressed air reheater and a cold water supply device, which are components of a cold water supply device unit equipped with a compressed air dehumidifier according to the present invention. be. FIG. 3 is a schematic horizontal (lateral) cross-sectional view of the compressed air reheater shown in FIG. 2 as viewed from above. FIG. 3 is a schematic vertical cross-sectional view seen from the right side of FIG. 2 ; 1 is a perspective view showing a configuration example of a cold water supply device unit including a compressed air dehumidifier according to the present invention, in which a cooling water pipe for cooling a pump motor is not installed; FIG. FIG. 6 is a perspective view seen from the right side of FIG. 5; FIG. 6 is a perspective view of FIG. 5 as seen from the back side and the right side; FIG. 6 is a perspective view showing a compressed air reheater and a cold water pressure-feeding pump, which are essential parts of the embodiment shown in FIG. FIG. 6 is a perspective view of a compressed air reheater and a cold water pressure-feeding pump, which are essential parts of the embodiment shown in FIG. FIG. 6 is an exploded perspective view showing a compressed air reheater and a cold water pumping pump, which are main parts of the embodiment shown in FIG. 5; FIG. 9 is a perspective view showing a reheater main body and a cold water pressure-feeding pump from the state of the embodiment shown in FIG. 8 with the built-in box removed; FIG. 10 is a perspective view showing a reheater main body and a cold water pressure-feeding pump from the state of the embodiment shown in FIG. 9 with the built-in box removed; FIG. 13 is a perspective view of the embodiment shown in FIG. 11 or 12 as viewed from the top side; FIG. 2 is a chart for explaining the heat quantity distribution generated by three heat exchangers (reheater, primary heat exchanger, secondary heat exchanger) corresponding to the configuration example shown in FIG. 1;

DETAILED DESCRIPTION OF THE INVENTION Embodiments of a cold water supply unit provided with a compressed air dehumidifier according to the present invention will now be described in detail with reference to the accompanying drawings (FIGS. 1 to 14).

A chilled water supply device unit equipped with a compressed air dehumidifier according to the present invention includes a compressed air dehumidifier 20 that uses the cooling action of the cooling water source 10 in common and a chilled water supply device 30 as a chiller, for example, incorporated into one package. In order to reduce the installation floor space of the equipment, it is possible to realize compactness, and it is possible to obtain the merits of combination such as reduction of energy consumption by interaction. Examples of the cooling water source 10 include a coolant-type cooling device (outside air heat absorption or outside air heat dissipation type cooling tower) that cools circulating water by using the heat of vaporization of water, refrigerating cycle cooling equipment for cooling water to be cooled, and equipment using natural water resources such as groundwater. Also, the cooling water source 10 is not limited to being configured by one, and may be configured by a plurality of sources.

The compressed air dehumidifier 20 according to the present invention includes a device housing 23 as a pressure vessel provided with a compressed air inlet 21 for introducing compressed air and a compressed air outlet 22 for discharging dehumidified compressed air, and Cooling for compressed air cooling, which is a pipeline for circulating the cooling water supplied from the cooling water source 10 inside the device housing 23 and is arranged to cool the compressed air and condense the moisture in the compressed air A water pipe 25 is provided.

In the compressed air dehumidifier 20 of this embodiment, as shown in FIG. (AIR IN) compressed air is primarily cooled by the built-in reheater section 27 and secondarily cooled by the water-cooled cooling section 28 . In addition, in the built-in reheater section 27, the compressed air cooled by the water-cooling type cooling section 28 to lower the dew point (DP) can be reheated to lower the relative humidity (RH). This reheating also has the effect of preventing re-condensation and increasing the amount of air.

That is, the built-in reheater section 27 includes a primary side compressed air flow path 27a for primarily cooling the compressed air introduced from the compressed air inlet 21 and circulating it to the water-cooled cooling section 28, and the primary side compressed air flow path 27a. Secondary side compressed air provided to intersect with the side compressed air flow path 27a for heat exchange and to reheat the compressed air cooled by the water-cooled cooling unit 28 and flow it to the compressed air outlet 22. A flow path 27b is provided.

Further, in the water-cooled cooling unit 28 of this embodiment, the folded tip end portion 25a of the cooling water pipe 25 for cooling the compressed air, which is a part of the cooling water pipe 25 for cooling the compressed air and serves as a heat exchange portion, is Built-in. Heat exchange fins 25b are attached to the cooling water pipe 25 for cooling the compressed air arranged in the water-cooling type cooling unit 28 so as to improve the efficiency of heat exchange. According to the cooling water pipe 25 for cooling the compressed air, the cooling water supplied from the cooling water source 10 is circulated inside the device housing 23 to cool the introduced compressed air and Moisture can be condensed to dehumidify and lower its dew point.

Condensed water (drain water) generated by condensation in the water-cooled cooling unit 28 is drained from a drain outlet 29b through a drain pipe 29 and a drain opening/closing valve 29a connected to the apparatus housing 23. is provided. A communicating portion 23a provided at one end portion of the device housing 23 serves as a channel space for communicating the compressed air water-cooling channel 28a of the water-cooled cooling unit 28 and the secondary side compressed air channel 27b. It's becoming Further, an outlet communicating portion 23b provided on the other end side of the device housing 23 is a channel space for communicating the secondary side compressed air channel 27b and the compressed air outlet 22 with each other.

The cold water supply device 30 according to the present invention supplies cold water cooled by the cooling water supplied from the cooling water source 10 via the cold water heat exchanger 34 to the cold water supply unit 80. A cold water tank 40 in which cold water cooled by the vessel 34 is stored, and a cold water pumping pump installed to pressure-feed the cold water in the cold water tank 40 (see the thick black line arrow shown in FIG. 2) 31. As shown in FIG. 2, the cold water force-feeding pump 31 is installed so that the cold water 100 stored in the cold water tank 40 is in a state where the suction port 31a enters. In this embodiment, a cold water circulation channel is provided so that the cold water supplied to the cold water supply unit 80 for water cooling flows through the cold water heat exchanger 34, is cooled, and is returned to the cold water tank 40. It is configured such that cold water can be circulated by operating the cold water pumping pump 31 .

According to the present invention, the compressed air is heated by exhaust heat generated from the pump motor 32 of the cold water pump 31, which is connected to the compressed air outlet passage 24 extending from the compressed air outlet 22. A compressed air reheater 50 provided with a reheating channel 50a arranged adjacent to the pump motor 32 is provided so as to reheat the compressed air cooled by the compressed air dehumidifier 20. As shown in FIG. The compressed air reheated by the compressed air reheater 50 is discharged (AIR OUT) from the product compressed air outlet 55 as product compressed air. In addition, in the compressed air reheater 50, drain water is generated by cooling the exhaust heat of the pump motor 2. As shown in FIG. This drain water is discharged to the outside through a channel (not shown) from the lower part of an internal box 70, which will be described later.

According to the present invention, the compressed air dehumidifier 20 and the cold water supply device 30, which commonly use the cooling action of the cooling water supplied from the cooling water source 10, are arranged rationally so that energy consumption can be reduced through interaction. can be incorporated into a unit. That is, the exhaust heat of the pump motor 32 of the cold water pump 31 can be used as heating energy for reheating the compressed air that has been dehumidified by the compressed air dehumidifier 20, and no other energy source is required. Energy consumption can be reduced. Also, the pump motor 32 is also cooled by the dehumidified compressed air depriving the energy of exhaust heat, and the exhaust heat can be appropriately treated. That is, in the present invention, it is found that the amount of heat exhausted from the pump motor 32 of the cold water pump 31 is appropriately balanced as the amount of heat for reheating the compressed air discharged from the compressed air dehumidifier 20. It's being used.

Further, in the compressed air reheater 50 of this embodiment, the reheating flow path 50a is provided in a form surrounding the pump motor 32, and is provided in a form branched by a plurality of branch pipes 52 for heat exchange. A reheater main body 51 is provided (see FIGS. 1 to 4, 10 to 13, etc.).

Since the reheater main body 51 is provided in this way, the heat conduction for the compressed air to absorb heat can be promoted, and the exhaust heat of the pump motor 32 is efficiently transferred to the compressed air. Reheating can be performed efficiently. In addition, since the heat exchange branch pipes 52 are spiral pipes, the surface area of the heat exchange branch pipes 52 can be increased, and the heat transfer efficiency can be further enhanced. The spiral pipes (heat exchange branch pipes 52) of this embodiment are arranged at a required distance from the pump/motor 32 so as not to come into contact with each other so as not to rub against each other due to vibration. Note that the form of the heat exchange branch pipe 52 is not limited to this, and, of course, heat transfer efficiency can be enhanced by attaching heat exchange fins, for example.

Further, in the reheater main body 51 of this embodiment, the plurality of branch pipes 52 for heat exchange are provided upstream of the plurality of branch pipes 52 for heat exchange in the flow of the compressed air, and the pump motor 32 A straight pipe-shaped upstream pipe portion 53 arranged parallel to the rotation axis, and a plurality of branch pipes 52 for heat exchange are provided on the downstream side of the flow of compressed air and arranged parallel to the rotation axis of the pump motor 32. It is provided by being formed in a U-shape and arranged in parallel with the straight pipe-like downstream pipe portion 54 .

By providing a plurality of heat exchange branch pipes 52 in this way, the pump motor 32 having a substantially cylindrical outer shape and having a power supply terminal box 32b arranged on one side (front side) can be reheated. The container body 51 can be arranged rationally. That is, the reheater main body 51 configured as a heat exchange section for reheating compressed air can be appropriately and rationally formed into a form with high heat exchange efficiency. The plurality of heat exchange branch pipes 52 are fixed inside a later-described internal box 70 by reheater fixing legs 56 shown in FIGS.

In addition, in this embodiment, the rotating shaft of the pump motor 32 is arranged to extend vertically along the substantially vertical direction, and the plurality of branch pipes 52 for heat exchange are pulled substantially parallel to the horizontal plane. It is arranged in a turned state. In other words, the upstream pipe portion 53 and the downstream pipe portion 54 are arranged on both sides of the power supply terminal box 32b and are vertically extended. A plurality of branch pipes 52 for heat exchange are arranged horizontally. In this embodiment, the position corresponds to the open portion of the U-shaped heat exchange branch pipe 52 (see FIGS. 3, 11, 13, etc.) and the power supply terminal box 32b is arranged below it. A reheater main body 51 is installed in the relationship.

According to this, the plurality of heat exchange branch pipes 52 can be arranged compactly and rationally in a form that further increases the heat exchange efficiency. According to this embodiment, the compressed air is re-flowed from above through the upstream pipe portion 53 so that the air flow of the compressed air becomes a downward flow in the upstream pipe portion 53 and an upward flow in the downstream pipe portion 54. It is configured to be introduced into the heater main body 51, pass through a plurality of branch pipes 52 for heat exchange, and be discharged upward through the downstream pipe portion 54 (see solid line arrows in FIG. 2). ). According to this, the compressed air before being reheated becomes a downward flow in the upstream piping section 53, and the compressed air after being reheated becomes an upward flow within the downstream piping section 54, so that the flow of the compressed air is Pressure loss can be suppressed and smooth, and efficient heat exchange can be performed.

In this embodiment, the pump motor 32 also includes a built-in cooling fan 33 that is fixed to the upper end of the rotating shaft of the pump motor 32 and rotates coaxially to generate a downward air flow. 2, the cooling air generated by the built-in cooling fan 33 flows downward along the outer surface of the pump motor 32 and is heated. A flow of heated cooling air (a flow of heated air) hits the plurality of branch pipes 52 for heat exchange. As shown in FIGS. 10 to 12, the outer surface of the pump motor 32 is provided with vertically extending rib-like cooling fins 32a. Cooling air generated by the fan 33 flows through it.

According to this configuration, the reheater main body 51 is configured by the action of radiant heat from the exhaust heat of the pump motor 32 and the flow of heated air that is heated by the exhaust heat of the pump motor 32 and sent by the built-in cooling fan 33 . By appropriately contacting the plurality of heat exchange branch pipes 52, heat exchange is efficiently performed, and the compressed air flowing inside the heat exchange branch pipes 52 is efficiently reheated. The portion where the power terminal box 32b is arranged blocks the flow of the cooling air generated by the built-in cooling fan 33. Above the power terminal box 32b, there is a U-shaped heat exchange fan. It is a portion where the branch pipe 52 is not located. Therefore, the U-shaped shape of the heat exchange branch pipes 52 according to the present embodiment (see FIG. 3, etc.) is not a disadvantage, and is a rational form for arranging the plurality of heat exchange branch pipes 52. Yes, the compressed air can be effectively reheated. Further, the U-shaped configuration of the heat exchange branch pipe 52 contributes to ease of maintenance such as inspection or replacement of the cold water pumping pump 31 and the pump motor 32 .

In addition, in this embodiment, the compressed air reheater 50 includes a built-in box 70 that houses the pump motor 32 and the reheater main body 51 that surrounds the pump motor 32. ing. More specifically, as shown in FIGS. 2 to 4 and 8 to 10, this built-in box 70 has a rectangular casing shape, and as shown in FIG. It has a form that can be disassembled into a plate (wall plate portion 71 ) and an inspection plate 74 . According to this, the energy of exhaust heat of the pump motor 32 can be appropriately kept inside the built-in box 70, and the compressed air can be effectively reheated.

Furthermore, in this embodiment, a reheater exhaust fan 72 for ventilating the air inside the built-in box 70 is attached to the built-in box exhaust port 76 of the wall plate portion 71 constituting the built-in box 70. there is The reheater exhaust fan 72 takes in cooling air (outside air) from an internal box intake port 75 provided at the bottom of the internal box 70 and heats it from an internal box exhaust port 76 provided at the top of the internal box 70 . It operates to exhaust the trapped cooling air. According to this, when the internal air of the built-in box 70 rises above the set temperature, the air can be forcibly exhausted to prevent the inside of the built-in box 70 from overheating. In addition, by arranging for inverter control based on information from a temperature sensor 77 (see FIG. 2) provided in the built-in box 70 so as to variably adjust the air volume of the reheater exhaust fan 72, The internal temperature of the built-in box 70 can be properly adjusted. This also makes it possible to appropriately adjust the reheating of the compressed air by the compressed air reheater 50 and prevent overheating of the pump motor 32 . Furthermore, since the built-in box intake port 75 and the built-in box exhaust port 76 are arranged at substantially diagonal positions as in this embodiment, the heat of the power supply terminal box 32b is smoothly discharged (exhausted), and the heat is Since the flow path of the replacement branch pipe 52 is intersected to flow cooling air, the air in the built-in box 70 can be exhausted so as to facilitate heat exchange. In addition, in the relationship between the reheater exhaust fan 72 and the built-in cooling fan 33, when both are in operation, partial overheating can be prevented and uniformed by the agitation effect of stirring the cooling air. Therefore, heat exchange can be efficiently performed as a whole.

Next, the chart of FIG. 14 shows an example (example) of the heat quantity distribution generated by the three heat exchangers (reheater, primary heat exchanger, secondary heat exchanger) corresponding to the configuration example shown in FIG. will be explained based on 14 is the compressed air reheater 50 shown in FIG. 1, and the primary heat exchanger is the internal reheater section 27 incorporated in the compressed air dehumidifier shown in FIG. The secondary heat exchanger is the water-cooled cooling unit 28 incorporated in the compressed air dehumidifier shown in FIG.

In this embodiment, the conditions are air volume: 83 m ³ /h (1.35 m ³ /min), inlet air: 0.7 MPa/30° C. saturated, ambient environment: 25° C./75% RH (DP 20° C.), cooling Water inlet temperature: At 13 ° C, the target value of the product compressed air to be discharged (exhaust) is, when the inlet air temperature is 30 ° C, the outlet temperature (exhaust temperature) is above the ambient temperature, under the outlet air pressure, the dew point is It is set to be below 17°C.

As shown in FIG. 14, first, in the primary heat exchanger (built-in reheater section 27 shown in FIG. 1), compressed air (30° C.) supplied from the compressor (compressed air generator 15) dehumidifies the compressed air. When introduced (AIR IN) from the compressed air inlet 21 of the device 20 to its built-in reheater section 27, 130 W of heat is exchanged with the compressed air heading for the compressed air outlet 22 of the compressed air dehumidifier 20. , the compressed air temperature is cooled from 30°C to 27°C.

Next, in the secondary heat exchanger (water-cooled cooling unit 28 shown in FIG. 1), when the compressed air (27° C.) cooled by the built-in reheater unit 27 is introduced into the water-cooled cooling unit 28, A heat exchange of 335 W is performed with the cooling water (13°C to 14°C) flowing through the cooling water pipe 25 for cooling the compressed air, and the temperature of the compressed air is cooled from 27°C to 17°C.

Next, in the primary heat exchanger (built-in reheater section 27 shown in FIG. 1), when the compressed air (17° C.) cooled by the water-cooled cooling section 28 is introduced into the built-in reheater section 27, , heat exchange with the compressed air introduced from the compressed air inlet 21 of the compressed air dehumidifier 20, the temperature of the compressed air is reheated from 17° C. to 21° C., and heat exchange of 130 W is performed.

Then, when the compressed air (21° C.) reheated by the built-in reheater section 27 is discharged from the compressed air outlet 22 of the compressed air dehumidifier 20 and introduced into the compressed air reheater 50, the pump motor 32 130 W of heat is exchanged with the exhaust heat (45°C) generated by the heat generation of the product, the temperature of the compressed air is reheated from 21°C to 25°C, and finally the compressed air at 25°C is discharged as the product compressed air exhaust. It is discharged (AIR OUT) from the outlet 55 . As a result, the product compressed air that satisfies the target value can be efficiently discharged. When the product compressed air is discharged from the product compressed air discharge port 55 in this manner, for example, in this embodiment, cold water adjusted to 22° C. flows through the cold water outlet pipe 44 to the cooled water supply unit 80 . It is set so that the cold water supplied and heated to 24° C. in the cold water supply portion 80 flows back through the cold water return pipe 42 . By the way, when the operation is started in winter, when the temperature of the cold water supply part 80 is low and the temperature of the cold water 100 in the cold water storage tank 40 is lower than that of the cooling water, the cold water 100 is the heat for cold water. It will be heated by the exchanger 34 . In such a case, the first on-off valve (cooling water on-off valve) 36 to be described later is closed to stop the heat exchange in the cold water heat exchanger 34 by the cooling water, and the third on-off valve (bypass on-off valve) to be described later is closed. ) 46 is appropriately opened, and the pump motor 32 is operated to operate the cold water pressurizing pump 31 to raise the cold water 100 to the required temperature. According to this, even when the external environment changes to a low temperature, the temperature of the cold water supplied to the cold water supply part 80 can be appropriately adjusted.

5 to 7, the positional relationship between the compressed air dehumidifier 20 and the cold water supply device 30 in the package unit equipped with the cold water supply device 30 is such that the compressed air dehumidifier is placed above the cold water supply device 30. 20 is located. Note that the compressed air dehumidifier 20 and the cold water supply device 30 of this embodiment are arranged so as to be built in the same housing, and are provided so as to share a power source. The compressed air introduced into the compressed air dehumidifier 20 has a temperature of, for example, 30°C. It is arranged on the upper part of the body 23 . The cooling water introduced into the compressed air dehumidifier 20 is, for example, 13° C., and the water-cooled cooling unit 28 is arranged in the lower part of the device housing 23 . Therefore, the temperature of the upper portion of the compressed air dehumidifier 20 is high, and the temperature of the lower portion of the compressed air dehumidifier 20 near the pump motor 32 where waste heat (45° C.) is generated is low.

Therefore, as described above, the side where the compressed air flow is introduced into the reheater main body 51 becomes a downward flow, and the side where the reheated compressed air flow is discharged from the reheater main body 51 becomes a downward flow. It becomes an upward flow, the flow of compressed air can be made smooth, and efficient heat exchange can be performed. In addition to this, the compressed air dehumidifier 20 whose temperature is lower than the exhaust heat temperature of the pump motor 32 is arranged above the cold water supply device 30 . According to this, a convection phenomenon occurs in which low-temperature air descends inside the package from the low-temperature compressed air dehumidifier 20, effectively cooling the cold water supply device 30 and preventing overheating. . In addition, since the piping from the downstream piping section 54 provided with the compressed air outlet flow path 24 and the product compressed air discharge port 55 is located above the unit, the compressed air is easily reheated, and the reheated compressed air has a positional relationship that facilitates maintenance of that temperature.

Next, an example of a cold water supply unit provided with a compressed air dehumidifier related to the present invention will be described in detail with reference to the accompanying drawings (FIGS. 1 to 4).
In addition to the configuration described above, the chilled water supply unit equipped with the compressed air dehumidifier related to the present invention has a cooling water source 10 so as to cool exhaust heat generated from the pump motor 32 of the chilled water pumping pump 31. A cooling water pipe 65 for cooling the pump motor, which is a pipe line for circulating the supplied cooling water and has a portion arranged adjacent to the pump motor 32, is provided.

This cooling water pipe 65 for cooling the pump motor is a pipe line for circulating the cooling water in this embodiment, and the cooling water is directed to a portion (portion where heat is exchanged) arranged adjacent to the pump motor 32. A continuous pipeline for supply (pipeline on the upstream side of the flow of cooling water) and a pipeline that continuously returns from the part where heat exchange is performed to the cooling water source 10 (pipeline on the downstream side of the flow of cooling water) ) and In the embodiment shown in FIG. 1, the cooling water pipe 65 for cooling the pump motor is a pipe line (cooling water pipe Although the pipe line is further branched from the branch pipe line 12), it may be directly connected to the cooling water pipe 11. In addition, the cooling water pipe 65 for cooling the pump motor of this embodiment may be formed in a spiral shape in order to increase the heat absorption efficiency like the heat exchange branch pipe 52, or may be formed in a U shape as shown in FIG. Forming in a shape can improve maintainability. Furthermore, the cooling water pipe 65 for cooling the pump motor is arranged above the suction port of the built-in cooling fan 33 and above the built-in box exhaust port 76, thereby interfering with the exhaust by the reheater exhaust fan 72. Therefore, the pump motor 32 can be cooled effectively.

According to the cooling water pipe 65 for cooling the pump motor, when the compressed air dehumidifier 20 and the cold water supply device 30 that commonly use the cooling action of the cooling water supplied from the cooling water source 10 are unitized, The pump/motor 32 that generates heat can be appropriately cooled according to the operating conditions. That is, for example, when only the cold water supply device 30 is operated without operating the compressed air dehumidifier 20, or when the operation of the compressed air dehumidifier 20 is at a low level and the pump motor 32 cannot be sufficiently cooled, The pump motor 32 can be forcibly cooled. Also, even if the pump motor 32 cannot be sufficiently cooled by the built-in cooling fan 33 or the reheater exhaust fan 72 due to the high temperature of the external environment, the pump motor 32 can be appropriately cooled to prevent overheating. is of course. Furthermore, when the compressed air dehumidifier 20 is in operation, by appropriately adjusting and controlling the flow rate of the cooling liquid flowing through the cooling water pipe 65 for cooling the pump motor, the air is discharged from the product compressed air outlet 55 (AIR OUT ) can be adjusted accordingly. Drain water is also generated in the cooling water pipe 65 for cooling the pump motor as the exhaust heat of the pump motor 32 is cooled. It is discharged to the outside from the lower part of the built-in box 70 through a channel (not shown).

In this embodiment, the cooling water pipe 65 for cooling the pump motor is provided with an on-off valve (second on-off valve 66) for opening and closing the pipe of the cooling water pipe 65 for cooling the pump motor. there is By opening the second on-off valve 66, cooling water can flow to cool the pump motor 32. As shown in FIG. When cooling of the pump motor 32 by the cooling water pipe 65 for cooling the pump motor is not required, the second on-off valve 66 is closed. Further, in this embodiment, the second on-off valve 66 is a flow control valve, and electromagnetic control relating to its opening and closing is performed by the control device 90 .

In this embodiment, the cooling water pipe 25 for cooling the compressed air and the cooling water pipe 65 for cooling the pump motor are arranged in parallel with the cooling water pipe 11 through which the cooling water supplied from the cooling water source 10 flows. It is According to this, for example, the cooling water pipe 25 for cooling the compressed air and the cooling water pipe 65 for cooling the pump motor can be rationally connected and piped to one cooling water source 10, and the device unit can be integrated. There is an advantage that the compressed air dehumidification device 20 and the cold water supply device 30 can be rationally incorporated in one casing. In this embodiment, the cooling water pipe 25 for cooling the compressed air and the cooling water pipe 65 for cooling the pump motor are connected from the branch pipe 12 of the cooling water pipe branched from the cooling water pipe 11. However, it is branched, and the return pipe portion 12 (a) of the branch pipe of the cooling water pipe is connected to the return pipe portion 11 (a) of the cooling water pipe, so that the cooling water of the cooling water source 10 is circulated. is configured to Also, as shown in FIG. 1, a flow meter 12b with a regulating valve is connected to the return pipe portion 12(a) of the branch pipe of the cooling water pipe, so that the flow rate can be checked and adjusted.

In this embodiment, as shown in FIG. 2, the pump motor 32 has a built-in cooling fan 33 which is fixed to the upper end of the rotating shaft of the pump motor 32 and rotates coaxially to generate a downward air flow. A cooling water pipe 65 for cooling the pump motor is arranged above the built-in cooling fan 33 . According to this, the cooling air cooled by the cooling water pipe 65 for cooling the pump motor is efficiently sucked by the built-in cooling fan 33, and the built-in cooling fan 33 generates an air flow (cooling air flow). As a result, the pump motor 32 can be efficiently cooled, and overheating of the pump motor 32 can be prevented.

Next, an example of a cold water supply unit provided with a compressed air dehumidifier related to the present invention will be described in detail with reference to the attached drawings (FIGS. 1, 5 to 7, etc.).
In addition to the configuration described above, the chilled water supply device unit provided with the compressed air dehumidifier related to the present invention is connected to the chilled water discharge port 43 of the chilled water pumping pump 31 to supply chilled water to the chilled water supply part 80. Cold water provided as a cold water bypass flow path by connecting a cold water outlet pipe 44 and a cold water return pipe 42 connected to return the cold water to the cold water tank 40 when supplied to the cold water supply part 80 A bypass pipe 45 is provided.

According to this, in the compressed air dehumidifier and the cold water supply device that commonly use the cooling action of the cooling water supplied from the cooling water source, when cold water is not supplied to the cooled water supply part 80 or when the supply amount of the cold water is Compressed air can be appropriately reheated using the pump/motor 32 as a heat source depending on the operating conditions of both devices, such as when the size is small. That is, by circulating the chilled water through the chilled water bypass pipe 45 by the chilled water pump 31, the pump motor 32 consumes required energy, and exhaust heat generated from the pump motor 32 is used to reheat the compressed air. can. At this time, cold water is not supplied to the cold water supply part 80 or the amount of cold water supplied is reduced, so the amount of energy for cooling the cold water by the cold water heat exchanger is reduced. Therefore, even when cold water is not supplied to the cold water supply part 80 or when the amount of cold water supplied is small, energy consumption can be reduced as much as possible, and compressed air can be efficiently reheated.

Further, according to the present embodiment, the bypass opening/closing valve 46 for opening and closing the pipe line of the cold water bypass pipe 45 and the cooling water supplied from the cooling water source 10 are supplied to the cold water heat exchanger 34 (the primary side of the cold water heat exchanger 34). A cooling water on-off valve 36 for opening and closing a cooling water pipe 35 for cooling cold water circulating in the side passage) is provided. In addition, the cooling water pipe 35 for cold water cooling forms a pipe line connected so as to be continuous from the cooling water pipe 11, and the return pipe portion 35 (a) of the cooling water pipe for cold water cooling is cooled. By being connected continuously to the return pipe portion 11 (a) of the water pipe, the cooling water of the cooling water source 10 is configured to flow and circulate through the primary side passage of the cold water heat exchanger 34. there is 1 and 5, the cooling water inlet 11b and the cooling water outlet 11c are connection ports for connecting to the cooling water source 10. As shown in FIGS.

According to this, when the cold water supply unit 80 does not require cold water, the amount of cold water supplied to the cold water supply unit 80 and the supply of cooling water to be circulated in the primary flow path of the cold water heat exchanger 34 The amount can be adjusted appropriately according to the operating conditions of the compressed air dehumidifier 20 and the cold water supply device 30 . The opening and closing of the bypass on-off valve 46 and the cooling water on-off valve 36 is not limited to full opening and full closing, but also includes opening and closing by variably adjusting the degree of opening and intermittent opening and closing. This includes adjusting the flow rate of cold water or cooling water accordingly. As a result, efficient operation of the compressed air dehumidifier 20 and the cold water supply device 30 can be achieved.

Further, according to this embodiment, the bypass opening/closing valve 46 and the cooling water opening/closing valve 36 are provided by flow control valves, and when the supply of cold water to the cooled water supply unit 80 is stopped, is provided with a control device 90 for controlling to open the bypass on-off valve 46 and to close the cooling water on-off valve 36 . According to this, even when cold water is not supplied to the cold water supply unit 80, the use conditions can be automatically handled, such as the compressed air can be appropriately reheated using the pump/motor 32 as a heat source.

In addition, the cold water supply device 30 of this embodiment is a cold water circulation supply device (chiller device) in which cold water circulates. A cold water circulation channel is provided so that it can be The cold water circulation channel of this embodiment includes a cold water outlet pipe 44 that is connected to the cold water discharge port 43 of the cold water pumping pump 31 and discharges cold water from the cold water tank 40, and a cold water supply unit 80 that supplies cold water to the cold water tank 40 side. The cold water return pipe 42 piped between the cold water supply unit 80 and the cold water heat exchanger 34 so as to return to the cold water heat exchanger 34, the secondary side flow path of the cold water heat exchanger 34, and the cold water heat exchanger 34 and the cold water inlet 41 of the cold water tank 40 are connected to each other by a cold water inlet connecting pipe 41a. In addition, as shown in FIGS. 1 and 5, the cold water inlet 42a and the cold water outlet 44a are connection ports for connecting to the cooled water supply section 80. As shown in FIGS.

Further, the cold water tank 40 of this embodiment is provided with an overflow 40a, a float switch 40b for adjusting the amount of water, a drain pipe 40c, a drain opening/closing valve 40d, and a water temperature sensor 40e. A water pressure gauge 44 b is arranged on the cold water outlet pipe 44 .

Next, an example of a cold water supply unit provided with a compressed air dehumidifier related to the present invention will be described in detail with reference to the attached drawings (FIGS. 1 to 13).
In addition to the configuration described above, the chilled water supply device unit equipped with the compressed air dehumidifier related to the present invention has a chilled water cooling unit that circulates the chilled water supplied from the chilled water source 10 to the chilled water heat exchanger 34. A cooling water pipe 35, a first on-off valve 36 which is a cooling water on-off valve for opening and closing the pipe of the cooling water pipe 35 for cold water cooling, and a first opening/closing valve 36 for opening and closing the pipe of the cooling water pipe 65 for cooling the pump motor. 2 on-off valve 66, a third on-off valve 46 that is a bypass on-off valve that opens and closes the pipe line of the cold water bypass pipe 45, and a fourth on-off valve that opens and closes the pipe line of the cooling water pipe 25 for cooling the compressed air. 26.

According to this, in the compressed air dehumidifier 20 and the cold water supply device 30 that commonly use the cooling action of the cooling water supplied from the cooling water source, the interaction between the compressed air dehumidifier 20 and the cold water supply device 30 can reduce energy consumption according to the external environmental conditions. Correspondingly, both operations can be related and controlled rationally and optimally. That is, by providing the on-off valves 36, 66, 46, and 26, it is possible to optimally control the flow of cooling water and cold water. The operating performance of both the 20 and the cold water supply device 30 can be improved.

Further, in this embodiment, each of the first on-off valve 36, the second on-off valve 66, the third on-off valve 46, and the fourth on-off valve 26 is provided by a flow control valve, and the flow rate A control device 90 is provided for controlling the control valve. According to this, the opening and closing of each on-off valve 36, 66, 46, 26 is
Fully open, fully closed, intermittent or variable can be controlled automatically by the controller 90 . It should be noted that variable control of the operation output of the cold water pressure-feeding pump 31 is preferably provided so that the operation of the pump motor 32 is inverter-controlled by the control device 90 .

In this embodiment, as the control program of the control device 90, a plurality of control modes corresponding to seasons are stored in the storage device of the control device. According to this, the operation control of the compressed air dehumidifier 20 and the cold water supply device 30 can be appropriately performed according to the season. That is, by controlling the on-off valves 36, 66, 46, 26 and the cold water pump 31 according to the season, it is possible to optimally control the flow of cooling water and cold water, stabilizing the temperature and humidity of the compressed air. It is possible to stably optimize the chiller water temperature while effectively optimizing.

Further, with respect to a specific control program, the above control mode, for example, as a mode when the temperature of the cooling water drops, the first on-off valve 36 is opened at a low opening degree or intermittently, and the second opening and closing is performed. The valve 66 is closed, the third on-off valve 46 is opened or opened at a low degree, the fourth on-off valve 26 is intermittently opened, and the pump motor 32 is variably operated in a winter mode. As an actual mode, the first on-off valve 36 is fully opened, the second on-off valve 66 is closed, the third on-off valve 46 is closed, the fourth on-off valve 26 is opened, and the pump motor 32 is variably operated. It may have a summer mode. According to this, the operation control of the compressed air dehumidifier 20 and the cold water supply device 30 can be precisely performed according to the season.

Furthermore, for specific control programs, in addition to the winter mode (for example, when the cooling water temperature is 6 to 10 ° C.) and the summer mode (for example, when the cooling water temperature is 16 to 20 ° C.), the cooling water As a mode in which the temperature is between winter and summer (for example, when the temperature of the cooling water is 11 to 15° C.), the first on-off valve 36 is variably opened, the second on-off valve 66 is intermittently opened, and the third A spring/autumn mode may be provided in which the on-off valve 46 is variably opened, the fourth on-off valve 26 is opened, and the pump motor 32 is variably operated. According to this, the operation control of the compressed air dehumidifier 20 and the cold water supply device 30 can be performed more precisely according to the season. The specific control mode described above is set so as to be applied when the compressed air dehumidifier 20 and the cold water supply device 30 are each operating under a specified load.

In the above embodiments, the cold water supply unit has been described that includes a compressed air dehumidifier that supplies compressed air and cold water to production equipment such as machine tools. However, the present invention is not limited to this, and compressed air is a concept that includes compressed gas, cooling water is a concept that includes cooling liquid (liquid heat medium), and cold water is a cold liquid (liquid heat medium). , and the application is not limited to production equipment such as machine tools. That is, the present invention can be used in facilities in all fields that require a compressed gas whose temperature and humidity are adjusted and a liquid heat carrier (chiller refrigerant) whose temperature is adjusted. Examples of the compressed gas include air whose components have been adjusted and air containing an inert gas. Examples of the liquid heat medium, such as cooling water and cold water, include antifreeze liquid.
Further, in the above example of the form, the apparatus case 23 of the compressed air dehumidifier 20 is illustrated as a shell type in FIG. A double-tube heat exchanger is not excluded.

Although the present invention has been described in various ways with preferred embodiments, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. It's about.

10 Cooling water source 11 Cooling water pipe 11 (a) Cooling water pipe return pipe portion 11b Cooling water inlet 11c Cooling water outlet 12 Cooling water pipe branch pipe 12 (a) Cooling water pipe branch pipe return pipe portion 12b Flow meter with adjusting valve 15 Compressed air generator 20 Compressed air dehumidifier 21 Compressed air inlet 22 Compressed air outlet 23 Device housing 23a Communication part 23b Outlet communication part 24 Compressed air outlet channel 25 Cooling water pipe 25a for cooling compressed air Folded tip portion 25b Heat exchange fin 26 Fourth on-off valve 27 Built-in reheater portion 27a Primary side compressed air flow path 27b Secondary side compressed air flow path 28 Water-cooled cooling section 28a Compressed air water-cooled flow path 29 Drain pipe 29a Drain opening/closing valve 29b Drain discharge port 30 Cold water supply device 31 Cold water pump 31a Suction port 32 Pump motor 32a Ribbed cooling fin portion 32b Power supply terminal box 33 Built-in cooling fan 34 Cold water heat exchanger 35 Cooling water for cold water cooling Pipe 35 (a) Return pipe portion 36 of cooling water pipe for cold water cooling First on-off valve (cooling water on-off valve)
40 Water tank for cold water 40a Overflow 40b Float switch 40c for water volume adjustment Drain pipe 40d Drain opening/closing valve 40e Water temperature sensor 41 Water tank inlet for cold water 41a Cold water inlet connection pipe 42 Cold water return pipe 42a Cold water inlet 43 Cold water discharge port 44 of cold water pumping pump Cold water Outlet pipe 44a Cold water outlet 44b Water pressure gauge 45 Cold water bypass pipe 46 Third on-off valve (bypass on-off valve)
50 Compressed air reheater 50a Reheat flow path 51 Reheater body 52 Heat exchange branch pipe 53 Upstream piping 54 Downstream piping 55 Product compressed air outlet 56 Reheater fixing leg 65 Cooling pump motor Cooling water pipe 66 Second on-off valve 70 Built-in box 71 Wall plate 72 Reheater exhaust fan 73 Reheater cover main body 74 Inspection plate 75 Built-in box intake port 76 Built-in box exhaust port 77 Temperature sensor 80 Cooled water supply unit 90 Control device 100 Cold water (cold liquid)

Claims (8)

A device housing as a pressure vessel provided with a compressed air inlet into which compressed air is introduced and a compressed air outlet through which dehumidified compressed air is discharged, and cooling water supplied from a cooling water source to the inside of the device housing. A compressed air dehumidifier comprising a cooling water pipe for cooling the compressed air arranged to cool the compressed air and condense moisture in the compressed air, which is a conduit for circulating the compressed air;
Cold water in which the cold water cooled by the cold water heat exchanger is stored so that the cold water cooled by the cooling water supplied from the cooling water source through the cold water heat exchanger is supplied to the cold water supply part a cold water supply device comprising a cold water tank and a cold water pressure pump installed to pump cold water stored in the cold water tank;
A chilled water supply unit comprising a compressed air dehumidifier comprising
The compressed air is cooled by the compressed air dehumidifier by heating the compressed air with the exhaust heat generated from the pump motor of the cold water pressure feed pump. A cold water supply apparatus with a compressed air dehumidifier, characterized by comprising a compressed air reheater provided with a reheating channel arranged adjacent to the pump motor so as to reheat the compressed air. unit. The compressed air reheater has a reheater main body in which the reheat flow path is provided in a form surrounding the pump motor and branched by a plurality of branch pipes for heat exchange. A chilled water supply unit with compressed air dehumidifier according to claim 1, characterized in that it comprises a section. In the reheater main body, the plurality of branch pipes for heat exchange are provided upstream of the plurality of branch pipes for heat exchange in the flow of the compressed air, and are arranged in parallel with the rotating shaft of the pump motor. and a straight-pipe downstream pipe provided downstream of the plurality of heat-exchange branch pipes in the flow of compressed air and parallel to the rotating shaft of the pump motor. 3. A cold water supply device unit with a compressed air dehumidifier according to claim 2, characterized in that it is provided by being formed in a U shape and arranged in parallel between them. The rotating shaft of the pump motor is arranged to extend in the vertical direction substantially in the vertical direction, and the plurality of branch pipes for heat exchange are arranged to be routed substantially parallel to the horizontal plane. A chilled water supply unit with a compressed air dehumidifier according to claim 3, characterized in that: 5. The compressed air dehumidifier according to claim 4, wherein the pump motor has a built-in cooling fan that is fixed to the upper end of the rotating shaft of the pump motor and rotates coaxially to generate a downward air flow. cold water supply unit. The compressed air reheater comprises a built-in box that houses the pump motor and the reheater main body that surrounds the pump motor. 6. Cold water supply unit comprising a compressed air dehumidifier according to any one of 5. 7. A cold water supply device unit equipped with a compressed air dehumidifier according to claim 6, wherein a wall plate portion constituting said built-in box is provided with a reheater exhaust fan for ventilating air in said built-in box. . 8. A cold water supply device unit with a compressed air dehumidifier according to claim 7, wherein said branch pipe for heat exchange is provided by a spiral pipe.

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