JP2019000823A - Liquid supply device - Google Patents

Abstract

To provide a liquid supply device which enables improvement of operation efficiency.SOLUTION: A liquid supply device 1 includes a first filter part 36A, a second filter part 36B, and a switching part 300. The first filter part 36A removes foreign objects in cold drain water 22 when the cold drain water 22 flows in a first direction and is cleaned by the cold drain water 22 when the cold drain water 22 flows in a second direction. The second filter part 36B removes foreign objects in the cold drain water 22 when the cold drain water 22 flows in a third direction and is cleaned by the cold drain water 22 when the cold drain water 22 flows in a fourth direction. The switching part 300 switches a state of the device between a first state where the cold drain water 22 is flowed in the first direction relative to the first filter part 36A and the cold drain water 22 is flowed in the fourth direction relative to the second filter part 36B and a second state where the cold drain water 22 is flowed in the second direction relative to the first filter part 36A and the cold drain water 22 is flowed in the third direction relative to the second filter part 36B.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a liquid supply apparatus that supplies a liquid.

  2. Description of the Related Art Conventionally, a liquid supply apparatus that supplies liquid to an apparatus that uses liquid is known. For example, the cold water manufacturing apparatus described in Patent Document 1 supplies cooled makeup water to a food processing plant. Cold drainage, which is the effluent from the food processing plant, flows to the first cold energy recovery device and the second cold energy recovery device. The first cold energy recovery device and the second cold energy recovery device recover cold energy from the cold drainage and cool the makeup water.

JP 2014-226077 A

  A drainage liquid used by a device that uses liquid, such as a food plant, may contain foreign substances. In order to remove the foreign matter, for example, it is conceivable to provide a filter in the liquid supply device and remove the foreign matter from the drainage liquid using the filter. However, by removing foreign matter from the drainage, foreign matter accumulates in the filter. For this reason, in order to remove the foreign matter accumulated on the filter, it is necessary to stop the liquid supply device and clean the filter. Since the liquid supply device is stopped for cleaning the filter, the operation time of the liquid supply device per unit time is shortened, and the operation efficiency of the liquid supply device may be reduced.

  An object of the present invention is to provide a liquid supply apparatus that improves the operation efficiency.

  The liquid supply apparatus according to the present invention supplies the first liquid to a liquid utilization apparatus that is an apparatus that uses the first liquid, and the second liquid is a liquid after the first liquid is utilized in the liquid utilization apparatus. A liquid supply apparatus in which a liquid flows, wherein when the second liquid flows in a first direction, foreign matter in the second liquid is removed, and the second direction is a direction opposite to the first direction. When the liquid flows, the first filter unit is cleaned by the second liquid, and when the second liquid flows in the third direction, the foreign matter in the second liquid is removed, and the third direction And when the second liquid flows in a fourth direction that is opposite to the second liquid portion, the second filter portion is cleaned by the second liquid, the first filter portion and the second filter portion, Flowing the second liquid in the first direction with respect to the first filter part; and A first state in which the second liquid is caused to flow in the fourth direction with respect to the second filter part; and a second liquid is caused to flow in the second direction with respect to the first filter part; and A switching unit that switches between a second state in which the second liquid flows in the third direction with respect to the second filter unit.

  In this case, in the first state, the first filter part removes foreign matters in the second liquid, and the second filter part is washed with the second liquid. Further, in the second state, the first filter part is washed with the second liquid, and the second filter part removes foreign matters in the second liquid. That is, while one of the first filter part and the second filter part is removing foreign substances in the second liquid, the other is cleaned. Then, the first state and the second state are switched by the switching unit. For this reason, for example, it is not necessary to stop the liquid supply device in order to clean the first filter part or the second filter part. Therefore, compared with the case where the liquid supply device is stopped, the operation time of the liquid supply device per unit time becomes longer, and the operation efficiency of the liquid supply device is improved.

  The liquid supply device is provided downstream of the first filter portion in the first state and downstream of the second filter portion in the second state, and A first heat exchanging unit configured to exchange heat between the second liquid flowing in the first direction or the second liquid flowing in the third direction with respect to the second filter unit and another medium; May be.

  In this case, the first heat exchange part is provided on the downstream side of the first filter part in the first state and on the downstream side of the second filter part in the second state. For this reason, the 2nd liquid from which the foreign material was removed by the 1st filter part or the 2nd filter part flows in into the 1st heat exchange part. Therefore, compared with the case where the 1st heat exchange part is provided in the upstream rather than the 1st filter part in the 1st state, and the 2nd filter part in the 2nd state, the 1st heat exchange It is possible to reduce the possibility that foreign matter flows into the part and the first heat exchange part is damaged by the foreign matter.

The liquid supply device includes: a first supply unit configured to flow the second liquid after passing through the first heat exchange unit in the second direction with respect to the first filter unit; and the first heat exchange unit. You may provide the 2nd supply means which flows the said 2nd liquid after passing into a said 4th direction with respect to a said 2nd filter part.

  In this case, when a part of the second liquid before passing through the first heat exchange part flows in the second direction with respect to the first filter part, or when it flows in the fourth direction with respect to the second filter part As compared with the above, the amount of the second liquid supplied to the first heat exchange section is increased. For this reason, the efficiency of the heat exchange in a 2nd heat exchange part improves.

  In the liquid supply apparatus, the other medium is a first heat medium, and the first heat exchange unit is the second liquid that has flowed in the first direction with respect to the first filter unit, or The second liquid that has flowed in the third direction with respect to the second filter unit and the first heat medium exchange heat, and the liquid supply device passes through the first heat exchange unit. A second heat exchange unit that performs heat exchange between the medium and the first liquid may be provided, and the first liquid may be supplied to the liquid utilization apparatus after passing through the second heat exchange unit.

  In this case, the first liquid after the heat exchange by the second heat exchange unit can be supplied to the liquid utilization device. Therefore, compared with the case where heat is not exchanged by the first heat exchange part and the second heat exchange part, energy for cooling or heating the first liquid can be reduced. Therefore, the cost for cooling or heating the first liquid can be reduced.

  Further, the second liquid and the first liquid are not supplied to the same heat exchange unit. For this reason, even when a 1st heat exchange part or a 2nd heat exchange part fails, it is prevented that a 2nd liquid mixes with a 1st liquid. Since the second liquid is a liquid after being used in the liquid utilization device, there is a higher possibility that foreign matter is mixed in than the first liquid. However, since the second liquid is prevented from being mixed with the first liquid, it is possible to reduce the possibility that the first liquid mixed with the foreign matter is used in the liquid utilization apparatus.

  The liquid supply device includes a second heat exchange unit that exchanges heat with the second liquid that has passed through the first heat exchange unit, and a second heat exchange unit that has passed through the third heat exchange unit. A fourth heat exchanging part for exchanging heat with the heat medium, and a third heat medium; a fifth heat exchanging heat with the first liquid passing through the fourth heat exchanging part; The first liquid may be supplied to the liquid utilization device after passing through the fifth heat exchange unit.

  In this case, the first liquid after the heat exchange by the fifth heat exchange unit can be supplied to the liquid utilization device. Therefore, compared with the case where heat is not exchanged by the third heat exchange part, the fourth heat exchange part, and the fifth heat exchange part, the energy for cooling or heating the first liquid can be reduced. Therefore, the cost for cooling or heating the first liquid can be reduced.

  Further, the second liquid and the first liquid are not supplied to the same heat exchange unit. For this reason, even when a 3rd heat exchange part, a 4th heat exchange part, or a 5th heat exchange part fails, it is prevented that a 2nd liquid mixes with a 1st liquid. Since the second liquid is a liquid after being used in the liquid utilization device, there is a higher possibility that foreign matter is mixed in than the first liquid. However, since the second liquid is prevented from being mixed with the first liquid, it is possible to reduce the possibility that the first liquid mixed with the foreign matter is used in the liquid utilization apparatus.

  In the liquid supply apparatus, the fourth heat exchange unit may be a heat pump. In this case, heat exchange can be performed using a heat pump.

2 is a block diagram showing a schematic configuration of a liquid supply apparatus 1. FIG. FIG. 3 is a diagram showing a configuration of a heat pump 35. It is a block diagram which shows the liquid supply apparatus 1 in a 1st state. It is a block diagram which shows the liquid supply apparatus 1 in a 2nd state. It is a flowchart of a 1st switching process. It is a figure which shows the structure of the heat pump. It is a flowchart of a 2nd switching process.

  Hereinafter, a liquid supply apparatus 1 embodying the present invention will be described. The liquid supply device 1 is a device that supplies makeup water 21 to a liquid utilization device 32 (described later) and uses the cold heat of the cold drainage 22 discharged from the liquid utilization device 32. As shown in FIG. 1, the liquid supply device 1 includes a liquid utilization device 32, a cooling unit 90, a control unit 4, a heat exchange unit 56, a switching unit 300, and a tank 591.

  The cooling unit 90 includes coolers 901, 902, and 903. The cooling unit 90 cools the makeup water 21 by the coolers 901, 902 and 903. The coolers 901, 902, and 903 are, for example, air-cooled or water-cooled heat pump chillers (cooling towers).

  The liquid utilization device 32 uses the makeup water 21 and discharges the cold drainage 22 that is a liquid after the makeup water 21 is utilized. The liquid utilization apparatus 32 is arrange | positioned at a factory etc., for example. The liquid utilization apparatus 32 should just use the replenishment water 21, and the use is not limited. In the present embodiment, as an example, the liquid utilization device 32 is a food processing plant that cools and cleans food. The makeup water 21 is, for example, clean water. For the makeup water 21, for example, water supply or well water is used. Since the cold drainage 22 is a liquid after the makeup water 21 is used in the liquid utilization device 32, for example, foreign matter such as a piece of vegetable or soil is included. This foreign matter is removed by the first filter portion 36A or the second filter portion 36B described later. The removal of foreign matters includes not only the case where all foreign matters are removed, but also the case where the amount of foreign matters in the cold drainage 22 is reduced by removing some foreign matters.

  The switching unit 300 includes a first filter unit 36A and a second filter unit 36B. The first filter part 36A and the second filter part 36B are, for example, disk filters. The first filter portion 36A includes outlets 37A and 38A through which the cold drainage 22 is supplied or discharged. The second filter portion 36B includes outlets 37B and 38B through which the cold drainage 22 is supplied or discharged.

  In the following description, the direction in which the cold drainage 22 flows so as to flow into the first filter portion 36A from the inlet / outlet 37A and to be discharged from the inlet / outlet 38A is referred to as a first direction. A direction in which the cold drainage 22 flows so as to flow into the first filter portion 36A from the inlet / outlet 38A and to be discharged from the inlet / outlet 37A is referred to as a second direction. The second direction is the reverse direction of the first direction.

  The direction in which the cold drainage 22 flows so as to flow into the second filter portion 36B from the inlet / outlet 37B and to be discharged from the inlet / outlet 38B is referred to as a third direction. A direction in which the cold drainage 22 flows so as to flow into the second filter portion 36B from the inlet / outlet 38B and to be discharged from the inlet / outlet 37B is referred to as a fourth direction. The fourth direction is the reverse direction of the second direction.

  36 A of 1st filter parts remove the foreign material in the cold drainage 22, when the cold drainage 22 flows to the 1st direction. That is, the cold drainage 22 flowing from the inlet / outlet 37A is removed from the foreign matter in the first filter portion 36A and discharged from the inlet / outlet 38A.

  In addition, the first filter portion 36A is washed by the cold drainage 22 when the cold drainage 22 flows in the second direction. When the cold drainage 22 flows in the first direction, the removed foreign matter accumulates in the first filter portion 36A, but is washed when the cold drainage 22 flows in the second direction. The foreign matter accumulated in the first filter portion 36A is discharged from the inlet / outlet port 37A and discharged from the flow path 73A (described later) to the outside of the liquid supply apparatus 1.

  The second filter portion 36B removes foreign matter in the cold drainage 22 when the cold drainage 22 flows in the third direction. That is, the cold drainage 22 that has flowed in from the inlet / outlet 37B has its foreign matter removed in the second filter portion 36B, and is discharged from the inlet / outlet 38B.

  Further, the second filter portion 36B is cleaned by the cold drainage 22 when the cold drainage 22 flows in the fourth direction. When the cold drainage 22 flows in the third direction, the removed foreign matter accumulates in the second filter portion 36B, but is washed when the cold drainage 22 flows in the fourth direction. The foreign matter accumulated in the second filter portion 36B is discharged from the inlet / outlet port 37B and discharged from the flow path 73B (described later) to the outside of the liquid supply apparatus 1.

The heat exchange unit 56 includes heat exchangers 561, 562, 563, 564, a heat pump 35,
And a tank 591. The heat exchange unit 56 is configured to collect the cold heat of the cold drainage 22 and to cool the makeup water 21 with the collected cold heat.

  The heat exchanger 561 includes the cold drainage 22 that flows in the first direction with respect to the first filter portion 36A, or the cold drainage 22 that flows in the third direction with respect to the second filter portion 36B, and another medium. Perform heat exchange. In the present embodiment, the other medium is the first heat medium 23. In the heat exchanger 561, the cold heat is recovered from the cold waste water 22, and the first heat medium 23 is cooled. The first heat medium 23 is, for example, a gaseous refrigerant (for example, R134a) at normal temperature and pressure (the same applies to the second heat medium 24 and the third heat medium 25 described later). The first heat medium 23 may be various media such as water and air. (The same applies to the second heat medium 24 and the third heat medium 25 described later.)

  The heat exchanger 562 performs heat exchange between the first heat medium 23 that has passed through the heat exchanger 561 and the makeup water 21. In the heat exchanger 562, cold heat is recovered from the first heat medium 23, and the makeup water 21 is cooled. That is, the heat exchanger 561 and the heat exchanger 562 collect the cold heat of the cold drainage 22 and cool the makeup water 21. The makeup water 21 is supplied to the liquid utilization device 32 after passing through the heat exchanger 562.

  The heat exchanger 564 performs heat exchange between the cold drainage 22 that has passed through the heat exchanger 561 and the second heat medium 24. In the heat exchanger 564, the cold heat is recovered from the cold waste water 22, and the second heat medium 24 is cooled.

  The heat pump 35 performs heat exchange between the second heat medium 24 that has passed through the heat exchanger 564 and the third heat medium 25. In the heat pump 35, the cold heat is recovered from the second heat medium 24, and the third heat medium 25 is cooled. Details of the operation of the heat pump 35 will be described later.

  The heat exchanger 563 performs heat exchange between the third heat medium 25 that has passed through the heat pump 35 and the makeup water 21. In the heat exchanger 563, the cold heat is recovered from the third heat medium 25, and the makeup water 21 is cooled. In other words, the heat exchanger 564, the heat pump 35, and the heat exchanger 563 recover the cold heat of the cold drainage 22 and cool the makeup water 21. The cooled makeup water 21 is supplied to the liquid utilization device 32 after passing through the heat exchanger 563. In the present embodiment, the makeup water 21 is supplied to the liquid utilization device 32 after passing through the heat exchanger 562, the heat exchanger 563, and the cooling unit 90.

  The tank 591 can store the makeup water 21 and functions as a buffer. The tank 591 stores the replenishing water 21 flowing through the liquid supply apparatus 1 or changes the flow path when some trouble occurs in the liquid supply apparatus 1, for example, when the flow path is clogged. . Thereby, for example, it is possible to prevent the liquid supply apparatus 1 from being broken and stopped. For example, when the liquid supply apparatus 1 is started again, the makeup water 21 can be adjusted to the set temperature earlier. In the present embodiment, as an example, the tank 591 is provided between a flow path 337 and a flow path 331 described later. Note that a tank may be arranged at an arbitrary position of the liquid supply apparatus 1. Moreover, when installing a tank, you may arrange | position a pump suitably.

  The control unit 4 includes a CPU 40, a ROM 41, a RAM 42, and the like. In the liquid supply apparatus 1, the place where the control unit 4 is arranged is not limited. For example, the control unit 4 may be disposed in the heat exchange unit 56.

  The CPU 40 controls the liquid supply device 1. Note that the CPU 40 does not have to control all the devices of the liquid supply apparatus 1, and some of the devices may be controlled by another CPU. For example, the liquid utilization device 32 and the cooling unit 90 may be controlled by a CPU different from the CPU 40.

  The ROM 41 and RAM 42 are electrically connected to the CPU 40. The ROM 41 stores various processing programs such as a program for first switching processing (see FIG. 5) described later. The RAM 42 stores various temporary data.

  A detailed configuration of the liquid supply apparatus 1 will be described. The liquid supply apparatus 1 includes various flow paths and electromagnetic valves. As shown in FIG. 1, the flow path 309 is a flow path to which makeup water 21 that is raw water is supplied. The channel 309 is connected to the channel 341 and the channel 310 at the connection point 383. An electromagnetic valve 411 is provided in the flow path 310. The electromagnetic valve 411 opens and closes the flow path 310 under the control of the CPU 40.

  The flow path 310 is connected to the flow path 311 and the flow path 339 at the connection point 384. The flow path 311 is connected to the cooler 901 of the cooling unit 90.

  The cooler 901 of the cooling unit 90 is connected to the cooler 902 via the flow path 312. The cooler 902 is connected to the cooler 903 via the flow path 313. The cooler 903 is connected to the liquid utilization apparatus 32 via the flow path 314.

  A flow path 315 extends from the liquid utilization device 32. The flow path 315 is connected to the switching unit 300. The switching unit 300 includes channels 70A, 70B, 72A, 72B, 73A, 73B, 74A, 74B, 75A, 75B, 76A, 76B, solenoid valves 80A, 80B, 81A, 81B, 82A, 82B, 83A, 83B, One filter portion 36A and a second filter portion 36B are provided.

  The channel 315 is connected to the channel 70A and the channel 70B at the connection point 371. An electromagnetic valve 80A is provided in the flow path 70A. The electromagnetic valve 80A opens and closes the flow path 70A under the control of the CPU 40.

  The flow path 70A is connected to the flow path 72A and the flow path 73A at the connection point 86A. An electromagnetic valve 81A is provided in the flow path 73A. The electromagnetic valve 81A opens and closes the flow path 73A under the control of the CPU 40.

  The flow path 72A is connected to the entrance / exit 37A of the first filter portion 36A. The entrance / exit 38A of the first filter portion 36A is connected to the flow path 74A. The flow path 74A is connected to the flow path 75A and the flow path 76A at the connection point 87A. An electromagnetic valve 82A is provided in the flow path 75A. The electromagnetic valve 82A opens and closes the flow path 75A under the control of the CPU 40. The channel 75A is connected to the channel 323 and the channel 75B at the connection point 374.

  An electromagnetic valve 83A is provided in the flow path 76A. The electromagnetic valve 83A opens and closes the flow path 76A under the control of the CPU 40. The flow path 76 </ b> A is connected to the flow path 76 </ b> B and the flow path 325 at the connection point 375.

  An electromagnetic valve 80B is provided in the flow path 70B. The electromagnetic valve 80B opens and closes the flow path 70B under the control of the CPU 40.

  The flow path 70B is connected to the flow path 72B and the flow path 73B at the connection point 86B. An electromagnetic valve 81B is provided in the flow path 73B. The electromagnetic valve 81B opens and closes the flow path 73B under the control of the CPU 40.

  The flow path 72B is connected to the entrance / exit 37B of the second filter portion 36B. The entrance / exit 38B of the second filter portion 36B is connected to the flow path 74B. The flow path 74B is connected to the flow path 75B and the flow path 76B at the connection point 87B. An electromagnetic valve 82B is provided in the flow path 75B. The electromagnetic valve 82B opens and closes the flow path 75B under the control of the CPU 40. The channel 75B is connected to the channel 323 and the channel 75A at the connection point 374.

  An electromagnetic valve 83B is provided in the flow path 76B. The electromagnetic valve 83B opens and closes the flow path 76B under the control of the CPU 40. The flow path 76 </ b> B is connected to the flow path 76 </ b> A and the flow path 325 at the connection point 375.

  As described above, the switching unit 300 is formed. The flow path 323 is connected to the heat exchanger 561. In the channel 323, a flow meter 611, a pressure gauge 621, and a thermometer 631 are provided. The flow meter 611 outputs the flow rate of the cold drainage 22 flowing through the flow path 323 to the CPU 40. The CPU 40 detects the flow rate of the cold drainage 22 flowing through the flow path 323 based on the output of the flow meter 611. The pressure gauge 621 outputs the pressure of the cold drainage 22 flowing through the flow path 323 to the CPU 40. The CPU 40 detects the pressure of the cold drainage 22 flowing through the flow path 323 based on the output of the pressure gauge 621. The thermometer 631 outputs the temperature of the cold drainage 22 flowing through the flow path 323 to the CPU 40. The CPU 40 detects the temperature of the cold drainage 22 flowing through the flow path 323 based on the output of the thermometer 631.

  A pressure gauge 622 and a thermometer 632 are provided in the flow path 325. The pressure gauge 622 outputs the pressure of the cold drainage 22 flowing through the flow path 325 to the CPU 40. The CPU 40 detects the pressure of the cold drainage 22 flowing through the flow path 325 based on the output of the pressure gauge 622. The thermometer 632 outputs the temperature of the cold drainage 22 flowing through the flow path 325 to the CPU 40. The CPU 40 detects the pressure of the cold drainage 22 flowing through the flow path 325 based on the output of the thermometer 632.

  The channel 325 is connected to the channel 326 and the channel 327 at the connection point 376. The flow path 326 is connected to the heat exchanger 561. The cold drainage 22 supplied from the flow path 323 to the heat exchanger 561 is discharged to the flow path 326.

  A flow path 328 and a flow path 329 are connected to the heat exchanger 561. Further, the flow path 328 and the flow path 329 are connected to the heat exchanger 562. The flow paths 328 and 329 are flow paths through which the first heat medium 23 flows.

  In the flow path 328, a pump 603, a flow meter 613, and a thermometer 633 are provided. The pump 603 circulates the first heat medium 23 in the heat exchanger 561, the flow path 328, the heat exchanger 562, and the flow path 328.

  The flow meter 613 outputs a signal based on the flow rate of the first heat medium 23 flowing through the flow path 328 to the CPU 40. The CPU 40 detects the flow rate of the first heat medium 23 flowing through the flow path 328 based on the output of the flow meter 613. The thermometer 633 outputs a signal based on the temperature of the first heat medium 23 flowing through the flow path 328 to the CPU 40. The CPU 40 detects the temperature of the first heat medium 23 flowing through the flow path 328 based on the output of the thermometer 633.

  A thermometer 634 is provided in the flow path 329. The thermometer 634 outputs a signal based on the temperature of the first heat medium 23 flowing through the flow path 329 to the CPU 40. The CPU 40 detects the temperature of the first heat medium 23 flowing through the flow path 329 based on the output of the thermometer 634.

  A flow path 330 and a flow path 331 are connected to the heat exchanger 562. A flow meter 615 and a thermometer 635 are provided in the flow path 331. The flow meter 615 outputs a signal based on the flow rate of the makeup water 21 flowing through the flow path 331 to the CPU 40. The CPU 40 detects the flow rate of the makeup water 21 flowing through the flow path 331 based on the output of the flow meter 615. The thermometer 635 outputs a signal based on the temperature of the makeup water 21 flowing through the flow path 331 to the CPU 40. The CPU 40 detects the temperature of the makeup water 21 flowing through the flow path 331 based on the output of the thermometer 635.

  A flow path 327 and a flow path 336 are connected to the heat exchanger 564. The cold drainage 22 supplied from the flow path 327 to the heat exchanger 564 is discharged to the flow path 336. The cold drainage 22 is discharged from the flow path 336 to the outside of the liquid supply apparatus 1.

  A flow path 334 and a flow path 335 are connected to the heat exchanger 564. The flow path 334 and the flow path 335 are connected to the heat pump 35. The flow paths 334 and 335 are flow paths through which the second heat medium 24 flows.

  A flow path 335 is provided with a pump 606, a flow meter 616, and a thermometer 636. The pump 603 circulates the second heat medium 24 in the heat exchanger 564, the flow path 335, the heat pump 35, and the flow path 334.

  The flow meter 616 outputs a signal based on the flow rate of the second heat medium 24 flowing through the flow path 335 to the CPU 40. The CPU 40 detects the flow rate of the second heat medium 24 flowing through the flow path 335 based on the output of the flow meter 616.

  The thermometer 636 outputs a signal based on the temperature of the second heat medium 24 flowing through the flow path 335 to the CPU 40. The CPU 40 detects the temperature of the second heat medium 24 flowing through the flow path 335 based on the output of the thermometer 636.

  A thermometer 637 is provided in the flow path 334. The thermometer 637 outputs a signal based on the temperature of the second heat medium 24 flowing through the flow path 334 to the CPU 40. The CPU 40 detects the temperature of the second heat medium 24 flowing through the flow path 334 based on the output of the thermometer 637.

  A flow path 330 and a flow path 337 are connected to the heat exchanger 563. The makeup water 21 supplied from the flow path 330 to the heat exchanger 563 is discharged to the flow path 337.

  A flow path 332 and a flow path 333 are connected to the heat exchanger 563. The flow path 332 and the flow path 333 are connected to the heat pump 35. The flow paths 332 and 333 are flow paths through which the third heat medium 25 flows.

  In the flow path 333, a pump 608, a flow meter 618, and a thermometer 638 are provided. The pump 608 circulates the third heat medium 25 in the heat pump 35, the flow path 333, the heat exchanger 563, and the flow path 332.

  The flow meter 618 outputs a signal based on the flow rate of the third heat medium 25 flowing through the flow path 333 to the CPU 40. The CPU 40 detects the flow rate of the third heat medium 25 flowing through the flow path 333 based on the output of the flow meter 618. The thermometer 638 outputs a signal based on the temperature of the third heat medium 25 flowing through the flow path 333 to the CPU 40. The CPU 40 detects the temperature of the third heat medium 25 flowing through the flow path 333 based on the output of the thermometer 638.

  A thermometer 639 is provided in the flow path 332. The thermometer 639 outputs a signal based on the temperature of the third heat medium 25 flowing through the flow path 332 to the CPU 40. The CPU 40 detects the temperature of the third heat medium 25 flowing through the flow path 332 based on the output of the thermometer 639.

  As described above, the flow path 332 and the flow path 333 are connected to the heat pump 35. The heat pump 35 is connected to a flow path 334 and a flow path 335. Details of the heat pump 35 will be described later.

  The flow path 331 is connected to the flow path 340 and the flow path 341 at the connection point 381. The flow path 340 is connected to the tank 591. The channel 341 is connected to the channel 309 and the channel 310 at the connection point 383.

  An electromagnetic valve 413 is provided in the flow path 341. The electromagnetic valve 413 opens and closes the flow path 341 under the control of the CPU 40.

  The flow path 337 is connected to the flow path 338 and the flow path 339 at the connection point 382. The flow path 338 is connected to the tank 591. The flow path 339 is connected to the flow path 310 and the flow path 311 at the connection point 384. The connection point 384 is provided closer to the cooling unit 90 than the electromagnetic valve 411 (that is, downstream of the makeup water 21).

  An electromagnetic valve 412 is provided in the flow path 339. The electromagnetic valve 412 opens and closes the flow path 339 under the control of the CPU 40.

  Details of the heat pump 35 will be described. The heat pump 35 is configured to cool the third heat medium 25 using the temperature of the second heat medium 24. The second heat medium 24 is cooled by the cold drainage 22 in the heat exchanger 564, and the makeup water 21 is cooled by the third heat medium 25 in the heat exchanger 563. That is, the heat pump 35 is configured to cool the makeup water 21 using the temperature of the cold drainage 22.

  As shown in FIG. 2, the heat pump 35 includes a heat exchanger 351, a heat exchanger 352, a compressor 353, an expansion valve 354, and an intermediate refrigerant pipe 355. The intermediate refrigerant pipe 355 is a circulation pipe through which the refrigerant 356 flows. The refrigerant 356 is a gaseous refrigerant at normal temperature and pressure, and is, for example, R134a.

  The heat exchanger 352 is connected to the flow path 334 and the flow path 335. The heat exchanger 352 is connected to the heat exchanger 351 through an intermediate refrigerant pipe 355. The heat exchanger 352 performs heat exchange between the second heat medium 24 supplied via the flow path 335 and the refrigerant 356. Thereby, cold heat is recovered from the second heat medium 24 and the refrigerant 356 is cooled.

  The heat exchanger 351 is connected to the flow path 332 and the flow path 333. The heat exchanger 351 performs heat exchange between the third heat medium 25 supplied from the flow path 332 and the refrigerant 356 flowing through the intermediate refrigerant pipe 355. Thereby, cold heat is recovered from the refrigerant 356 and the third heat medium 25 is cooled. The third heat medium 25 after the heat exchange is performed flows out to the flow path 333.

  The compressor 353 and the expansion valve 354 are interposed in the intermediate refrigerant pipe 355. The compressor 353 is configured to compress the refrigerant 356. As the refrigerant 356 is compressed, the temperature of the refrigerant 356 increases. The expansion valve 354 is configured to expand the refrigerant 356. As the refrigerant 356 expands, the temperature of the refrigerant 356 decreases.

  In the present embodiment, the third heat medium 25 is cooled by the heat exchanger 351. More specifically, the refrigerant 356 is compressed by the compressor 353. As a result, the temperature of the refrigerant 356 increases. Next, heat exchange between the second heat medium 24 and the refrigerant 356 is performed by the heat exchanger 352. At this time, the temperature of the second heat medium 24 increases and the temperature of the refrigerant 356 decreases. Next, the refrigerant 356 is expanded by the expansion valve 354. As a result, the temperature of the refrigerant 356 decreases. Next, in the heat exchanger 351, the third heat medium 25 is cooled by heat exchange between the third heat medium 25 and the refrigerant 356. The cooled third heat medium 25 is supplied to the heat exchanger 563 via the flow path 333 and used for cooling the makeup water 21.

  The operation of the liquid supply apparatus 1 will be described with reference to FIG. 1, FIG. 3, and FIG. Although not shown, when the liquid supply apparatus 1 is activated, the amount of cold drainage 22 discharged from the liquid utilization apparatus 32 is not sufficient. For this reason, when the liquid supply apparatus 1 is activated, the solenoid valves 412 and 413 are closed by the control of the CPU 40, and the flow of the makeup water 21 to the heat exchange unit 56 is blocked. On the other hand, the electromagnetic valve 411 is opened, and the makeup water 21 flows to the cooling unit 90 via the flow paths 309, 310, and 311. In addition, the coolers 901, 902, and 903 are activated.

  Then, the replenishing water 21 is sequentially cooled by the coolers 901, 902, and 903, whereby the replenishing water 21 having a predetermined temperature (2 degrees in this specific example) is discharged at the outlet of the cooler 903. The makeup water 21 produced in this way is supplied to the liquid utilization device 32.

  After a while from the startup of the liquid supply device 1, a sufficient amount of cold drainage 22 for recovering cold heat is discharged from the liquid utilization device 32 to the flow path 315. The switching unit 300 is in the first state (see FIG. 3, described later) or in the second state until a sufficient amount of the cold drainage 22 for cold heat recovery is discharged from the liquid utilization device 32 to the flow path 315. (See FIG. 4, which will be described later). The switching unit 300 may be switched between the first state and the second state.

  Setting is made such that when a sufficient amount of cold drainage 22 for cold heat recovery is discharged from the liquid utilization device 32 to the flow path 315, the makeup water 21 is supplied to the liquid utilization device 32 via the heat exchange unit 56. Is done.

  More specifically, as shown in FIG. 3, the solenoid valve 411 is closed and the solenoid valves 412 and 413 are opened under the control of the CPU 40. Although not specifically described below, a mark 95 is illustrated in the electromagnetic valve with the flow path closed.

  The makeup water 21 is supplied from the flow path 309 (see arrow 501). As an example, the temperature of the makeup water 21 flowing through the flow path 309 is 19 degrees. The makeup water 21 flows through the flow path 309, the flow path 341, and the flow path 331, and is supplied to the heat exchanger 562 (see arrow 502).

  In the heat exchanger 562, heat exchange between the first heat medium 23 and the makeup water 21 is performed. Thereby, cold heat is recovered from the first heat medium 23 and the makeup water 21 is cooled. The temperature of the makeup water 21 decreases from 19 degrees to 14 degrees, for example. The makeup water 21 is supplied from the heat exchanger 562 to the flow path 330 (see arrow 503).

  The makeup water 21 is supplied to the heat exchanger 563 via the flow path 330 (see arrow 503). In the heat exchanger 563, heat exchange between the third heat medium 25 and the makeup water 21 is performed. Thereby, cold heat is recovered from the third heat medium 25 and the makeup water 21 is cooled. The temperature of the makeup water 21 decreases from 14 degrees to 9 degrees, for example. The makeup water 21 is supplied from the heat exchanger 563 to the flow path 337 (see arrow 504).

  The makeup water 21 is supplied to the cooler 901 of the cooling unit 90 via the flow paths 337, 339, and 311 (see arrow 504). That is, in this embodiment, the heat exchangers 562 and 563 are arranged in series with the coolers 901, 902, and 903.

  The makeup water 21 is supplied to the flow path 314 via the cooler 901, the flow path 312, the cooler 902, and the flow path 313. The makeup water 21 is cooled by the coolers 901, 902 and 903. As a result, the temperature of the makeup water 21 decreases from 9 degrees to 2 degrees, for example.

  The makeup water 21 is supplied to the liquid utilization apparatus 32 via the flow path 314 (see arrow 504). The makeup water 21 is used in the liquid utilization device 32, and the cold drainage 22 is discharged to the flow path 315 (see arrow 505). The cold drainage 22 is a liquid after the makeup water 21 has been used in the liquid utilization device 32, and therefore includes, for example, foreign matters such as a piece of vegetable and soil.

  The cold drainage 22 is supplied to the switching unit 300. Details of the flow of the cold drainage 22 in the switching unit 300 will be described later. In addition, the foreign material contained in the cold waste water 22 is removed by the first filter portion 36A or the second filter portion 36B.

  The cold drainage 22 from which foreign matters have been removed in the first filter part 36A or the second filter part 36B is supplied to the heat exchanger 561 via the flow path 323. The temperature of the cold drainage 22 flowing through the flow path 323 is, for example, 10 degrees.

  On the other hand, the first heat medium 23 flowing through the flow path 329 is supplied to the heat exchanger 561 (see the arrow 511 in FIGS. 3 and 4). In the heat exchanger 561, heat exchange between the cold waste water 22 and the first heat medium 23 is performed. Thereby, cold heat is recovered from the cold drainage 22 and the first heat medium 23 is cooled. For example, the temperature of the first heat medium 23 decreases from 17 degrees to 12 degrees. On the other hand, the temperature of the cold drainage 22 rises from 10 degrees to 15 degrees. The first heat medium 23 is supplied from the heat exchanger 561 to the heat exchanger 562 via the flow path 328.

  The cold drainage 22 is supplied from the heat exchanger 561 to the flow path 326. The cold drainage 22 branches into a flow path 325 and a flow path 327 at a connection point 376. The cold drainage 22 is supplied to the heat exchanger 564 via the flow path 327 (see arrow 506).

  On the other hand, the second heat medium 24 flowing through the flow path 334 is supplied to the heat exchanger 564 (see arrows 512 in FIGS. 3 and 4). In the heat exchanger 564, heat exchange between the cold waste water 22 and the second heat medium 24 is performed. Thereby, the cold heat is recovered from the cold drainage 22 and the second heat medium 24 is cooled. For example, the temperature of the second heat medium 24 decreases from 23 degrees to 17 degrees. On the other hand, the temperature of the cold drainage 22 increases from 15 degrees to 21 degrees, for example.

  The cold drainage 22 is supplied from the heat exchanger 564 to the flow path 336. The cold drainage 22 is drained to the outside of the liquid supply apparatus 1 via the flow path 336 (see arrow 507).

  The second heat medium 24 is supplied from the heat exchanger 564 to the flow path 335. The second heat medium 24 is supplied to the heat pump 35 via the flow path 335. On the other hand, the third heat medium 25 is supplied to the heat pump 35 via the flow path 332. As described above, in the heat pump 35, heat exchange between the second heat medium 24 and the third heat medium 25 is performed. Thereby, cold heat is recovered from the second heat medium 24 and the third heat medium 25 is cooled. For example, the temperature of the third heat medium 25 decreases from 12 degrees to 7 degrees. The temperature of the second heat medium 24 rises from 17 degrees to 23 degrees, for example.

  The third heat medium 25 is supplied from the heat pump 35 to the heat exchanger 563 via the flow path 333 (see the arrow 513 in FIGS. 3 and 4). As described above, in the heat exchanger 563, heat exchange between the makeup water 21 and the third heat medium 25 is performed. Thereby, cold heat is recovered from the third heat medium 25 and the makeup water 21 is cooled. The temperature of the makeup water 21 decreases from 14 degrees to 9 degrees, for example. On the other hand, the temperature of the cold drainage 22 increases from 7 degrees to 12 degrees, for example. The third heat medium 25 is supplied from the heat exchanger 563 to the flow path 332.

  The switching of the flow path in the switching unit 300 will be described. The switching unit 300 is switched between the first state (see FIG. 3) and the second state (see FIG. 4) under the control of the CPU 40. In the first state, the cold drainage 22 flows in the first direction with respect to the first filter portion 36A (see arrow 521 in FIG. 3), and the cold drainage 22 flows in the fourth direction with respect to the second filter portion 36B. State (see arrow 522 in FIG. 3). In the second state, the cold drainage 22 flows in the second direction with respect to the first filter portion 36A (see arrow 531 in FIG. 4), and the cold drainage 22 flows in the third direction with respect to the second filter portion 36B. State (see arrow 532 in FIG. 4).

  As shown in FIG. 3, when setting to the first state, the CPU 40 opens the electromagnetic valves 80A and 82A and the electromagnetic valves 81B and 83B, and closes the electromagnetic valves 81A and 83A and the electromagnetic valves 80B and 82B. Accordingly, the cold drainage 22 is supplied to the flow path 323 via the flow path 315, the flow path 70A, the flow path 72A, the first filter portion 36A, the flow path 74A, and the flow path 75A (arrow 521 in FIG. 3). reference). The cold drainage 22 is supplied to the heat exchanger 561 via the flow path 232 (see an arrow 527 in FIG. 3). That is, the cold water drain 22 that has flowed in the first direction with respect to the first filter portion 36A is supplied to the heat exchanger 561. In the first filter portion 36A, since the cold drainage 22 flows in the first direction, the foreign matter in the cold drainage 22 is removed.

  In the first state, the cold drainage 22 that has passed through the heat exchanger 561 is supplied to the switching unit 300 via the flow path 326 and the flow path 325. The cold drainage 22 is drained to the outside of the liquid supply apparatus 1 through the flow path 76B, the flow path 74B, the second filter portion 36B, the flow path 72B, and the flow path 73B. Since the cold drainage 22 flows in the fourth direction in the second filter portion 36B, the second filter portion 36B is washed by the cold drainage 22. The foreign matter removed from the second filter part 36B by the cleaning is discharged from the flow path 73B together with the cold drainage 22.

  As shown in FIG. 4, when setting to a 2nd state, CPU40 opens electromagnetic valve 80B, 82B and electromagnetic valve 81A, 83A, and closes electromagnetic valve 81B, 83B and electromagnetic valve 80A, 82A. Accordingly, the cold drainage 22 is supplied to the flow path 323 via the flow path 315, the flow path 70B, the flow path 72B, the second filter portion 36B, the flow path 74B, and the flow path 75B (arrow 532 in FIG. 4). reference). The cold drainage 22 is supplied to the heat exchanger 561 via the flow path 323 (see an arrow 527 in FIG. 4). That is, the cold water drain 22 that has flowed in the third direction with respect to the second filter portion 36B is supplied to the heat exchanger 561. In the second filter portion 36B, since the cold drainage 22 flows in the third direction, the foreign matter in the cold drainage 22 is removed.

  In the second state, the cold drainage 22 that has passed through the heat exchanger 561 is supplied to the switching unit 300 via the flow path 326 and the flow path 325. The cold drainage 22 is drained to the outside of the liquid supply device 1 through the flow path 76A, the flow path 74A, the first filter portion 36A, the flow path 72A, and the flow path 73A. Since the cold drainage 22 flows in the second direction in the first filter portion 36A, the first filter portion 36A is washed by the cold drainage 22. The foreign matter removed from the first filter portion 36A by the cleaning is discharged from the flow path 73A together with the cold drainage 22.

  The first switching process executed by the CPU 40 will be described with reference to FIG. The CPU 40 reads the control program stored in the ROM 41 and develops it in the RAM 42 when the liquid supply apparatus 1 is activated. The CPU 40 controls the liquid supply apparatus 1 according to the control program. The control program includes a program for the first switching process shown in FIG. CPU40 performs a 1st switching process according to the program of a 1st switching process.

  As shown in FIG. 5, in the first switching process, it is determined whether to switch between the first state (see FIG. 3) and the second state (see FIG. 4) (S1). For example, the CPU 40 determines to switch between the first state and the second state when the flow rate of the flow path 323 based on the output of the flow meter 611 becomes a predetermined value or less. This is because when the flow rate of the flow path 323 is equal to or less than the predetermined value, it is assumed that the flow of the first filter part 36A or the second filter part 36B is deteriorated by the foreign matter. Note that the CPU 40 may determine to switch between the first state and the second state based on other determination criteria. For example, the CPU 40 may determine that the flow path is switched when a predetermined time (for example, 1 hour) elapses after setting the first state or the second state.

  When the CPU 40 determines not to switch between the first state and the second state (S1: NO), the process of S1 is repeated. When the CPU 40 determines to switch between the first state and the second state (S1: YES), the switching unit 300 switches between the first state and the second state (S2). When the CPU 40 is set in the first state (see FIG. 3), the CPU 40 switches from the first state (see FIG. 3) to the second state (see FIG. 4) (S2). That is, the CPU 40 opens the electromagnetic valves 80B and 82B and the electromagnetic valves 81A and 83A, and closes the electromagnetic valves 81B and 83B and the electromagnetic valves 80A and 82A.

  Further, when the CPU 40 is set to the second state (see FIG. 4), the CPU 40 switches from the second state (see FIG. 4) to the first state (see FIG. 3). That is, the CPU 40 opens the electromagnetic valves 80A and 82A and the electromagnetic valves 81B and 83B, and closes the electromagnetic valves 81A and 83A and the electromagnetic valves 80B and 82B. Next, the CPU 40 returns the process to S1.

  As described above, the liquid supply apparatus 1 in the present embodiment is formed. In the present embodiment, the first state (see FIG. 3) and the second state (see FIG. 4) are switched (see S2 in FIG. 5). And the heat exchanger 561 is the cold drainage 22 (refer FIG. 3) which flowed in the 1st direction with respect to the 1st filter part 36A, or the cold drainage 22 which flowed in the 3rd direction with respect to the 2nd filter part 36B. (Refer FIG. 4) and heat exchange with another medium (1st heat medium 23 in this embodiment) are performed.

  In the first state (see FIG. 3), the first filter portion 36 </ b> A removes foreign matters in the cold drainage 22, and the second filter portion 36 </ b> B is washed by the cold drainage 22. In the second state (see FIG. 3), the second filter portion 36 </ b> B removes foreign matters in the cold drainage 22, and the first filter portion 36 </ b> A is washed by the cold drainage 22. That is, while one of the first filter portion 36A and the second filter portion 36B is removing the foreign matter in the cold drainage 22, the other is washed. Then, the first state (see FIG. 3) and the second state (see FIG. 4) are switched. For this reason, it is not necessary to stop the liquid supply apparatus 1 in order to wash | clean the 1st filter part 36A or the 2nd filter part 36B, for example. Therefore, compared with the case where the liquid supply apparatus 1 is stopped, the operation time of the liquid supply apparatus 1 per unit time becomes longer, and the operation efficiency of the liquid supply apparatus 1 is improved.

  Further, the heat exchanger 561 is provided in the flow path of the cold drainage 22 on the downstream side of the first filter portion 36A in the first state and on the downstream side of the second filter portion 36B in the second state. . The heat exchanger 561 includes the cold drainage 22 that flows in the first direction with respect to the first filter portion 36A, or the cold drainage 22 that flows in the third direction with respect to the second filter portion 36B, and another medium. The heat exchange with the first heat medium 23 is performed. Since the heat exchanger 561 is provided on the downstream side of the first filter portion 36A and the second filter portion 36B, the cold drainage 22 from which foreign matters have been removed by the first filter portion 36A or the second filter portion 36B is heated. It flows into the exchanger 561. Therefore, compared with the case where the heat exchanger 561 is provided upstream from the first filter portion 36A in the first state and upstream from the second filter portion 36B in the second state, the heat exchanger It is possible to reduce the possibility that foreign matter flows into 561 and a failure occurs in the heat exchanger 561 due to the foreign matter.

  Moreover, the flow path 326, the flow path 325, the flow path 76A, and the flow path 74A allow the cold drainage 22 after passing through the heat exchanger 561 to flow in the second direction with respect to the first filter portion 36A (FIG. 3). reference). The flow path 326, the flow path 325, the flow path 76B, and the flow path 74B allow the cold drainage 22 after passing through the heat exchanger 561 to flow in the fourth direction with respect to the second filter portion 36B (see FIG. 4). . For this reason, a part of the cold drainage 22 before passing through the heat exchanger 561 flows in the second direction with respect to the first filter part 36A, or flows in the fourth direction with respect to the second filter part 36B. Compared to the case, the amount of the cold drainage 22 supplied to the heat exchanger 561 increases. For this reason, the efficiency of heat exchange in the heat exchanger 561 is improved.

  In addition, the heat exchanger 561 is a cold drainage 22 (see FIG. 3) that flows in the first direction with respect to the first filter portion 36A, or a cold drainage 22 that flows in the third direction with respect to the second filter portion 36B. (Refer FIG. 4) and heat exchange with the 1st heat medium 23 are performed. The heat exchanger 562 performs heat exchange between the first heat medium 23 that has passed through the heat exchanger 561 and the makeup water 21 (see FIGS. 3 and 4). The makeup water 21 is supplied to the liquid utilization device 32 after passing through the heat exchanger 562. For this reason, the makeup water 21 after heat exchange by the heat exchanger 562 can be supplied to the liquid utilization apparatus 32. Therefore, compared with the case where heat is not exchanged by the heat exchanger 561 and the heat exchanger 562, the energy for cooling the makeup water 21 can be reduced. Therefore, the cost for cooling the makeup water 21 can be reduced.

  The makeup water 21 is supplied to the heat exchanger 562, and the cold drainage 22 is supplied to the heat exchanger 561. That is, the makeup water 21 and the cold drainage 22 are not supplied to the same heat exchanger. For this reason, even when the heat exchanger 561 or the heat exchanger 562 fails, the cold drainage 22 is prevented from being mixed with the makeup water 21. Since the cold drainage 22 is a liquid after being used in the liquid utilization device 32, there is a higher possibility that foreign matter is mixed in than the makeup water 21. However, since the cold drainage 22 is prevented from being mixed with the makeup water 21, the possibility that the makeup water 21 mixed with foreign matters is used in the liquid utilization device 32 can be reduced.

  Further, the heat exchanger 564 performs heat exchange between the cold waste water 22 that has passed through the heat exchanger 561 and the second heat medium 24 (see FIGS. 3 and 4). The heat pump 35 performs heat exchange between the second heat medium 24 that has passed through the heat exchanger 561 and the third heat medium 25. The heat exchanger 563 performs heat exchange between the third heat medium 25 that has passed through the heat pump 35 and the makeup water 21. The makeup water 21 is supplied to the liquid utilization device 32 after passing through the heat exchanger 563. For this reason, the makeup water 21 after heat exchange by the heat exchanger 563 can be supplied to the liquid utilization apparatus 32. Therefore, compared with the case where heat is not exchanged by the heat exchanger 564, the heat pump 35, and the heat exchanger 563, the energy for cooling the makeup water 21 can be reduced. Therefore, the cost for cooling the makeup water 21 can be reduced.

  Further, the cold drain 22 and the makeup water 21 are not supplied to the same heat exchanger. For this reason, even when the heat exchanger 564, the heat pump 35, or the heat exchanger 563 fails, the cold drainage 22 is prevented from being mixed with the makeup water 21. As described above, since the cold drainage 22 is a liquid after being used in the liquid utilization device 32, there is a higher possibility that foreign matter is mixed in than the makeup water 21. However, since the cold drainage 22 is prevented from being mixed with the makeup water 21, the possibility that the makeup water 21 mixed with foreign matters is used in the liquid utilization device 32 can be reduced.

  The heat exchanger 564 is provided downstream of the first filter portion 36A in the first state and downstream of the second filter portion 36B in the second state in the flow path through which the cold drainage 22 flows. Yes. For this reason, the cold drainage 22 from which foreign matter has been removed by the first filter portion 36A or the second filter portion 36B flows into the heat exchanger 564. Therefore, compared with the case where the heat exchanger 564 is provided upstream of the first filter portion 36A in the first state and upstream of the second filter portion 36B in the second state, the heat exchanger The possibility that foreign matter flows into 564 and the heat exchanger 564 is damaged by the foreign matter can be reduced.

  Moreover, the liquid supply apparatus 1 uses a heat pump 35 and can perform heat exchange.

  In the present embodiment, the makeup water 21 is an example of the “first liquid” in the present invention. The cold drainage 22 is an example of the “second liquid” in the present invention. The heat exchanger 561 is an example of the “first heat exchange part” in the present invention. The flow path 326, the flow path 325, the flow path 76A, and the flow path 74A are examples of the “first supply unit” in the present invention. The flow path 326, the flow path 325, the flow path 76B, and the flow path 74B are examples of the “second supply unit” in the present invention. The heat exchanger 562 is an example of the “second heat exchange unit” in the present invention. The heat exchanger 564 is an example of the “third heat exchange part” in the present invention. The heat pump 35 is an example of the “fourth heat exchange unit” in the present invention. The heat exchanger 563 is an example of the “fifth heat exchange unit” in the present invention.

  In addition, this invention is not limited to said embodiment, A various change is possible. For example, the CPU 40 opens and closes the electromagnetic valves 411, 412, 413, 80A, 80B, 81A, 81B, 82A, 82B, 83A, 83B, but is not limited to this. For example, the solenoid valves 411, 412, 413, 80A, 80B, 81A, 81B, 82A, 82B, 83A, and 83B may be valves that are opened and closed by an operator's manual operation instead of the solenoid valves. In this case, in the switching unit 300, the first state (see FIG. 3) and the second state (see FIG. 4) may be set by the operator's operation. Moreover, the kind of electromagnetic valve 411,412,413,80A, 80B, 81A, 81B, 82A, 82B, 83A, 83B is not limited, Various motorized valves may be sufficient.

  Further, the makeup water 21 and the cold drainage 22 are water, but may be other liquids. Further, although the tank 591 is provided, it may not be provided. Further, the flow path 73A from which the cold drainage 22 is discharged may be connected to the flow path 73B. In this case, for example, the flow path 73A and the flow path 73B may be connected downstream of the electromagnetic valve 81A and the electromagnetic valve 81B.

  Moreover, although the heat exchangers 562 and 563 were arrange | positioned in series with the coolers 901, 902, and 903, it is not limited to this. For example, the heat exchangers 562, 563 may be arranged in parallel with at least one of the coolers 901, 902, 903. Further, the heat exchangers 562 and 563 may be arranged in parallel with the entire cooling unit 90. In this case, when heat exchange by the heat exchangers 562 and 563 is started, the cooling unit 90 may be stopped.

  Further, a filter that removes large foreign matter may be provided before the cold drainage 22 from the liquid utilization device 32 flows to the first filter portion 36A or the second filter portion. For example, the filter is provided between the flow path 315 and the liquid utilization device 32. The filter is, for example, a slit type filter. The filter can remove, for example, large foreign matters such as vegetable waste. The cold drainage 22 after the large foreign matter has been removed by the filter includes foreign matter that is smaller than the foreign matter having a size that is removed by the filter. In order to prevent the heat exchangers 561, 564 and the like from being clogged by the small foreign matter, the first filter portion 36A and the second filter portion 36B are provided.

  Further, at least one of the heat exchanger 564, the heat pump 35, and the heat exchanger 563 may not be provided. In this case, for example, the cold heat may be recovered from the cold waste water 22 and the makeup water 21 may be cooled by at least one of the heat exchanger 564, the heat pump 35, and the heat exchanger 563. Further, the heat pump 35 may be a heat exchanger different from the heat pump.

  Further, the cold drainage 22 after passing through the heat exchanger 561 is caused to flow in the second direction with respect to the first filter portion 36A (see FIG. 3), and is caused to flow in the fourth direction with respect to the second filter portion 36B. (See FIG. 4). However, it is not limited to this. For example, a part of the cold drainage 22 before the heat exchanger 561 is flowed in the second direction with respect to the first filter portion 36A and may be flowed in the fourth direction with respect to the second filter portion 36B. .

  Moreover, the heat exchanger 561 may be provided upstream of the first filter portion 36A in the first state and upstream of the second filter portion 36B in the second state. The heat exchanger 564 may be provided upstream of the first filter part 36A in the first state and upstream of the second filter part 36B in the second state. Further, the cold drainage 22 that has passed through the first filter part 36A or the second filter part 36B may be used for other purposes different from heat exchange.

  Moreover, although the case where the replenishment water 21 was cooled using the cold heat of the cold drain 22 was demonstrated, you may be comprised so that the replenishment water 21 may be heated. For example, instead of the cooling unit 90, a heating unit for heating the makeup water 21 may be provided. In this case, the heat of the wastewater (corresponding to the second liquid of the present invention) that has passed through the liquid utilization device 32 is transferred by the heat exchanger 561, the heat exchanger 562, the heat exchanger 564, the heat pump 35, and the heat exchanger 563. It may be recovered and the makeup water 21 may be heated.

  Further, a tank may be arranged at an arbitrary position of the liquid supply apparatus 1. Further, a pump may be arranged at an arbitrary position of the liquid supply apparatus 1. Further, the heat exchanger 562 may not be provided, and the heat exchanger 561 may perform heat exchange between the cold drainage 22 and the makeup water 21. That is, heat exchange between the cold drainage 22 and the makeup water 21 may be performed without using the first heat medium 23. In this case, the makeup water 21 corresponds to the “other medium” of the present invention.

  Moreover, although the heat pump 35 was comprised so that the cold heat from the cold drainage 22 might be transmitted, it is not limited to this. For example, the heat pump 35 may be switchable between an air-cooled type configured to transmit cold heat from air and a water-cooled type configured to transmit cold heat from the cold drainage 22. Hereinafter, the modified example will be described. In the following description, in FIG. 6, the same components as those in FIG.

  FIG. 6 shows a heat pump 350 according to a modification of the heat pump 35 shown in FIG. The heat pump 350 is disposed at the same position as the heat pump 35 shown in FIG. The heat pump 350 includes an air-cooled heat exchanger 701 and electromagnetic valves 711, 712, 713, and 714 in addition to the heat exchangers 351 and 352, the compressor 353, the expansion valve 354, and the intermediate refrigerant pipe 355.

  The intermediate refrigerant pipe 355 branches into two flow paths at the connection point 721 and the connection point 722, respectively. More specifically, the connection point 721 is provided between the heat exchanger 352 and the compressor 353. The connection point 721 branches into a flow path 731 and a flow path 732. The flow path 731 is connected to the heat exchanger 352. An electromagnetic valve 711 is provided in the flow path 731. The electromagnetic valve 711 opens and closes the flow path 731 under the control of the CPU 40. The flow path 732 is connected to the air-cooled heat exchanger 701. An electromagnetic valve 712 is provided in the flow path 732. The electromagnetic valve 712 opens and closes the flow path 732 under the control of the CPU 40.

  The connection point 722 is provided between the heat exchanger 352 and the expansion valve 354. The connection point 722 branches into a flow path 733 and a flow path 734. The flow path 733 is connected to the heat exchanger 352. An electromagnetic valve 713 is provided in the flow path 733. The electromagnetic valve 713 opens and closes the flow path 733 under the control of the CPU 40. The flow path 734 is connected to the air-cooled heat exchanger 701. An electromagnetic valve 714 is provided in the flow path 734. The electromagnetic valve 714 opens and closes the flow path 734 under the control of the CPU 40.

  The air-cooled heat exchanger 701 includes a fan 702. The fan 702 takes air into the air-cooled heat exchanger 701. The air-cooled heat exchanger 701 cools the refrigerant 356 by heat exchange between the refrigerant 356 flowing through the intermediate refrigerant pipe 355 (more specifically, the flow paths 732 and 734) and air.

  The second switching process executed by the CPU 40 will be described with reference to FIG. In the second switching process, the cooling of the refrigerant 356 by the air-cooled heat exchanger 701 (that is, the cold heat from the cold drainage 22 is not used) before the same process as the first switching process (see FIG. 5) is executed. , Cooling by air cooling) is switched to cooling of the refrigerant 356 by the heat exchanger 352 (that is, cooling using the cold heat from the cold drainage 22).

  The CPU 40 reads the control program stored in the ROM 41 and develops it in the RAM 42 when the liquid supply apparatus 1 is activated. The CPU 40 controls the liquid supply apparatus 1 according to the control program. The control program includes a second switching process program shown in FIG. The CPU 40 executes the second switching process according to the program for the second switching process.

  As shown in FIG. 7, in the second switching process, first, cooling by the air-cooled heat exchanger 701 is performed (see S11). More specifically, the electromagnetic valves 711 and 713 shown in FIG. 6 are closed, and the electromagnetic valves 712 and 714 are opened. As a result, the refrigerant 356 in the intermediate refrigerant pipe 355 circulates through the air-cooled heat exchanger 701. The fan 702 is driven to introduce air into the air-cooled heat exchanger 701.

  In the air-cooled heat exchanger 701, the refrigerant 356 is cooled by cold air. Then, in the heat exchanger 351, the third heat medium 25 is cooled by the refrigerant 356.

  Further, the electromagnetic valve 411 shown in FIG. 4 is closed, and the electromagnetic valves 412 and 413 are opened. Thus, as in the case shown in FIG. 4, the makeup water 21 passes through the flow path 341, the flow path 331, the heat exchanger 562, the flow path 330, the heat exchanger 563, the flow path 337, and the flow path 311. It is supplied to the cooling unit 90.

  In the path through which the makeup water 21 flows, heat exchange between the third heat medium 25 and the makeup water 21 is performed in the heat exchanger 563, and the makeup water 21 is cooled. That is, the makeup water 21 is cooled by the cold heat from the air collected in the air-cooled heat exchanger 701.

  As described above, when the liquid supply device 1 is started, a sufficient amount of cold drainage 22 for recovering cold heat is not discharged from the liquid utilization device 32 to the flow path 315. For this reason, it is difficult to recover the cold heat from the cold drainage 22 in the heat exchangers 561 and 564. However, in this embodiment, the cooling water can be recovered from the air by the air-cooled heat exchanger 701 and the makeup water 21 can be cooled.

  After the execution of S11, the cooling of the refrigerant 356 by the air-cooled heat exchanger 701 (that is, the cooling started in S11) to the cooling of the refrigerant 356 by the heat exchanger 352 (that is, the cold heat from the cold drainage 22 is used). Whether or not to switch the cooling method (S12).

  For example, it is determined that the cooling method is switched when a certain amount of cold drainage 22 has been discharged from the liquid utilization device 32 to the flow path 315 after a while since the liquid supply device 1 was started. . The criterion for determining to switch the cooling method is not limited. For example, it may be determined that the cooling method is switched when a predetermined time has elapsed since the liquid supply device 1 was started. Further, when the flow rate of the flow path 323 based on the output of the flow meter 611 becomes equal to or higher than a predetermined value, it may be determined that the cooling method is switched.

  When it is determined that the cooling method is not switched (S12: NO), the process of S12 is repeated. That is, cooling of the makeup water 21 via the air-cooled heat exchanger 701 is continued. When it is determined that the cooling method is switched (S12: YES), the cooling of the refrigerant 356 by the heat exchanger 352 from the cooling of the refrigerant 356 by the air-cooled heat exchanger 701 (that is, the cooling using the cold heat from the cold drainage 22). ), The cooling method is switched (S13).

  More specifically, the electromagnetic valves 712 and 714 shown in FIG. 6 are closed and the electromagnetic valves 711 and 713 are opened. As a result, the refrigerant 356 in the intermediate refrigerant pipe 355 circulates through the heat exchanger 352. Similarly to the case shown in FIGS. 3 and 4 described above, the cold heat is recovered from the cold drainage 22 by the heat exchanger 561 and the heat exchanger 564 and transmitted to the makeup water 21.

  Next, the processes of S1 and S2 are performed as in the first switching process (see FIG. 5). That is, the cooling of the makeup water 21 is continued while switching between the first state and the second state.

  In the present modification, even when the liquid drainage device 2 is activated, even if a sufficient amount of cold drainage 22 for cooling recovery is not discharged from the liquid utilization device 32 to the flow path 315, the air-cooled heat exchanger 701. Thus, cold energy can be recovered from the air and the makeup water 21 can be cooled. For this reason, compared with the case where the air-cooling type heat exchanger 701 is not provided, the energy for cooling the makeup water 21 can be reduced. Therefore, the cost for cooling the makeup water 21 can be reduced.

  Further, when a sufficient amount of cold drainage 22 for recovering cold heat is discharged from the liquid utilization device 32 to the flow path 315, makeup water is supplied from the cold drainage 22 by cold heat via the heat exchanger 352 of the heat pump 350. 21 can be cooled. Therefore, the energy for cooling the makeup water 21 can be reduced as compared with the case where the cold heat of the cold drainage 22 is not used. Therefore, the cost for cooling the makeup water 21 can be reduced.

  Note that, in the present modification, when the liquid supply device 1 is started, even when a sufficient amount of cold drainage 22 for cooling recovery is not discharged from the liquid utilization device 32 to the flow path 315, air-cooling heat exchange is performed. Since cold energy can be recovered from the air and the makeup water 21 can be cooled by the vessel 701, for example, the number of the coolers 901, 902, and 903 in the cooling unit 90 can be reduced. It is also possible to delete the entire cooling unit 90. For this reason, the cost of the liquid supply apparatus 1 can be reduced.

DESCRIPTION OF SYMBOLS 1 Liquid supply apparatus 21 Supplementary water 22 Cold drainage 23 1st heat medium 24 2nd heat medium 25 3rd heat medium 32 Liquid utilization apparatus 35,350 Heat pump 36A 1st filter part 36B 2nd filter part 300 Switching part

Claims (6)

A liquid supply apparatus that supplies the first liquid to a liquid utilization apparatus that is an apparatus that uses the first liquid, and flows a second liquid that is a liquid after the first liquid is utilized in the liquid utilization apparatus. ,
When the second liquid flows in the first direction, foreign matter in the second liquid is removed, and when the second liquid flows in a second direction that is opposite to the first direction, the second liquid A first filter part that is cleaned with a liquid;
When the second liquid flows in the third direction, foreign matter in the second liquid is removed, and when the second liquid flows in a fourth direction that is opposite to the third direction, the second liquid A second filter part that is cleaned with liquid;
Including the first filter part and the second filter part, allowing the second liquid to flow in the first direction with respect to the first filter part, and in the fourth direction with respect to the second filter part. A first state in which the second liquid is caused to flow; and the second liquid is caused to flow in a second direction with respect to the first filter portion; and A liquid supply apparatus comprising: a switching unit that switches between a second state in which two liquids flow.   Provided downstream from the first filter part in the first state and downstream from the second filter part in the second state, and flowed in the first direction with respect to the first filter part The second liquid or the second liquid that has flowed in the third direction with respect to the second filter unit, and a first heat exchange unit that performs heat exchange with another medium. The liquid supply apparatus according to claim 1. First supply means for flowing the second liquid after passing through the first heat exchange section in the second direction with respect to the first filter section;
The second supply means for flowing the second liquid after passing through the first heat exchanging portion in the fourth direction with respect to the second filter portion. Liquid supply device. The other medium is a first heat medium,
The first heat exchanging part is the second liquid that has flowed in the first direction with respect to the first filter part, or the second liquid that has flowed in the third direction with respect to the second filter part. , Exchange heat with the first heat medium,
The liquid supply device includes:
A second heat exchange section that performs heat exchange between the first heat medium that has passed through the first heat exchange section and the first liquid;
4. The liquid supply apparatus according to claim 2, wherein the first liquid is supplied to the liquid utilization apparatus after passing through the second heat exchange unit. A third heat exchange part that exchanges heat between the second liquid that has passed through the first heat exchange part and a second heat medium;
A fourth heat exchange part that exchanges heat between the second heat medium that has passed through the third heat exchange part and the third heat medium;
The third heat medium that has passed through the fourth heat exchange part, and a fifth heat exchange part that performs heat exchange with the first liquid,
5. The liquid supply apparatus according to claim 2, wherein the first liquid is supplied to the liquid utilization apparatus after passing through the fifth heat exchange unit.   The liquid supply device according to claim 5, wherein the fourth heat exchange unit is a heat pump.

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