JP2015152233A - High temperature fluid supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high temperature fluid supply system with excellent versatility capable of coping with variation of a heat quantity of receiving fluid.SOLUTION: A high temperature fluid supply system 10 for supplying high temperature gas to a drier comprises: a heat pump 2 for obtaining high temperature gas by recovering heat from receiving water by a heat absorbing heat exchanger 21, and heating outside air by a heat radiating heat exchanger 22; a first fan 51 for feeding the high temperature gas obtained by the heat pump 2 toward the drier; control means 9 for acquiring temperature information of the receiving water flowing through the heat absorbing heat exchanger 21; and a damper 41 for controlling a flow rate of the outside air flowing through the heat radiating heat exchanger 22. The control means 9 controls the damper 41 on the basis of the temperature information of the receiving water, and makes the damper 41 adjust the flow rate of the outside air flowing through the heat radiating heat exchanger 22.

Description

  The present invention relates to a high-temperature fluid supply system that supplies a high-temperature fluid to a high-temperature fluid utilization apparatus.

  A high-temperature fluid supply system that uses waste heat from waste hot water discharged from factory facilities, etc. as a heat source, heats fluid such as outside air with a heat pump, and supplies this heated high-temperature fluid to a high-temperature fluid utilization device such as a dryer Is adopted. Hereinafter, the fluid before becoming a high temperature fluid may be referred to as a low temperature fluid. In a high-temperature fluid supply system, for example, a device such as a machine tool in a factory is used as a heat source, and a fluid such as waste warm water obtained by recovering heat from the heat source is received by a heat pump. Hereinafter, the fluid that the heat pump receives may be referred to as a receiving fluid. The heat pump includes a heat exchanger for heat absorption and a heat exchanger for heat dissipation. In the heat pump, heat is exchanged between the receiving fluid and a refrigerant such as carbon dioxide by the heat absorption heat exchanger, and the heat of the receiving fluid is recovered by the refrigerant. As the receiving fluid passes through the endothermic heat exchanger, heat is recovered and the temperature is lowered. Hereinafter, the fluid that has passed through the endothermic heat exchanger may be referred to as a passing fluid. The passing fluid whose temperature has decreased is sent to the heat source body and used for cooling the heat source body. Hereinafter, the ability of the heat exchanger for heat absorption to recover heat from the receiving fluid may be referred to as cooling ability. The refrigerant that has recovered the heat from the receiving fluid is compressed by the compressor, becomes high pressure and high temperature, and is sent to the heat exchanger for heat dissipation. In the heat exchanger for heat dissipation, the fluid is heated by exchanging heat between a fluid such as outside air and a high-pressure and high-temperature refrigerant, and a high-temperature fluid is obtained. Hereinafter, the ability of the heat dissipation heat exchanger to dissipate heat may be referred to as heat dissipation capability, and the amount of heat dissipated by the heat dissipation heat exchanger may be referred to as heat dissipation amount. The high-temperature fluid is supplied to a dryer or the like and used for hot air or the like that dries an object to be dried.

  Here, the heat radiation capacity is theoretically the sum of the cooling capacity and the power consumption of the compressor of the heat pump. Generally, since the flow rate and set temperature of the high-temperature fluid supplied to the dryer or the like are kept constant, the necessary heat radiation capacity is also almost constant. As a result, the cooling capacity and the power consumption of the heat pump compressor are substantially constant. On the other hand, the amount of heat generated from the heat source body fluctuates depending on seasonal fluctuations and the operating conditions of the device that becomes the heat source body, and accordingly, the amount of heat that the receiving fluid can recover from the heat source body also varies. When the amount of heat collected by the receiving fluid from the heat source is small, the temperature of the passing fluid that has passed through the heat-absorbing heat exchanger decreases, and when the passing fluid is a fluid such as water, the passing fluid is finally frozen. It reaches temperature and freezes. As a result, the high-temperature fluid supply system is abnormally stopped. For this reason, when the amount of heat that the receiving fluid can recover from the heat source body is small, a high-temperature fluid supply system has been proposed in which the receiving fluid can recover heat from another heat source body (for example, Patent Document 1). reference).

  In the high-temperature fluid supply system described in Patent Document 1, a circulation path that is connected to a heat exchanger for heat absorption of a heat pump and circulates fluid, and a first branch circulation path and a second branch circulation path that are branched from the circulation path, respectively. It has. The first branch circuit is connected to a cooling device that recovers heat from the first heat source body, and the second branch circuit is connected to a cooling device that recovers heat from the second heat source body. is there. The circulation path is provided with a temperature sensor for measuring the temperature of the passing fluid. In the high-temperature fluid supply system described in Patent Document 1, heat is usually recovered from the first heat source body by the fluid flowing from the circulation path to the first branch circulation path. If the amount of heat recovered from the first heat source body is small due to seasonal fluctuations or a decrease in the operating rate of the first heat source body, and the temperature of the passing fluid measured by the temperature sensor falls below the set temperature, the second heat source It also collects heat from the body. In this way, the shortage of the heat amount recovered from the first heat source body is compensated by recovering heat from the second heat source body.

JP 2013-68363 A

  However, in the high-temperature fluid supply system described in Patent Document 1, a second heat source body is required in addition to the first heat source body. However, in a facility such as a factory, the second heat source body cannot be secured. There is inferior versatility.

  In view of the above circumstances, an object of the present invention is to provide a high-temperature fluid supply system that is excellent in versatility and can cope with fluctuations in the amount of heat of a fluid flowing through a heat-absorbing heat exchanger.

A first high-temperature fluid supply system of the present invention that solves the above-described object is a high-temperature fluid supply system that supplies a high-temperature fluid to a high-temperature fluid utilization device that uses the supplied high-temperature fluid.
A heat pump that recovers heat from the receiving fluid by means of an endothermic heat exchanger, and obtains the high-temperature fluid by heating a low-temperature fluid lower than the high-temperature fluid to a temperature higher than the low-temperature fluid by means of a heat-dissipating heat exchanger;
A feeding means for sending the high-temperature fluid obtained by the heat pump toward the high-temperature fluid utilization device;
Control means for acquiring information on the temperature of the fluid flowing through the heat-absorbing heat exchanger;
Adjusting means for adjusting the amount of fluid flowing to the heat-dissipating heat exchanger,
The control means controls the adjustment means based on the information, and causes the adjustment means to adjust the amount of fluid flowing in the heat-dissipating heat exchanger.

  Here, when the information is information relating to a temperature drop of the fluid flowing through the heat absorption heat exchanger, the control unit causes the adjustment unit to reduce the amount of fluid flowing through the heat dissipation heat exchanger. It may be a thing. The fluid flowing through the heat absorption heat exchanger includes the receiving fluid that is received by the heat absorption heat exchanger and the fluid that has passed through the heat absorption heat exchanger.

  According to the first high-temperature fluid supply system of the present invention, the control means supplies the adjusting means with the fluid flowing through the heat-dissipating heat exchanger based on information about the temperature of the fluid flowing through the heat-absorbing heat exchanger. Let the amount of adjust. Therefore, in accordance with the amount of heat of the fluid flowing in the heat absorption heat exchanger, the amount of heat radiated by the heat dissipation heat exchanger and the amount of heat recovered from the fluid flowing in the heat absorption heat exchanger by the heat absorption heat exchanger Can be adjusted. Thereby, it can respond to the fluctuation | variation of the calorie | heat amount of the fluid which flows into the said heat exchanger for heat absorption. For example, when the information is information related to a temperature drop of the fluid flowing through the heat absorption heat exchanger, the control unit causes the adjustment unit to reduce the amount of fluid flowing through the heat dissipation heat exchanger. By doing so, it is possible to reduce the amount of heat recovered from the fluid flowing through the heat absorption heat exchanger, and to prevent the fluid flowing through the heat absorption heat exchanger from reaching the freezing temperature. Further, when the information is information related to a temperature rise of the fluid flowing through the heat absorption heat exchanger, the control unit increases the amount of the fluid flowing through the heat dissipation heat exchanger. Also good. By doing so, the amount of heat recovered from the fluid flowing through the heat absorption heat exchanger is increased, and for example, the heat recovered by the receiving fluid from the heat source body can be utilized without wasting it. Furthermore, since the first high-temperature fluid supply system of the present invention does not adjust the amount of heat of the receiving fluid, there is no need for a plurality of heat source bodies for recovering the heat of the receiving fluid. It is excellent.

The second high-temperature fluid supply system of the present invention that solves the above-described object is a high-temperature fluid supply system that supplies a high-temperature fluid to a high-temperature fluid utilization device that uses the supplied high-temperature fluid.
A heat pump that recovers heat from the receiving fluid by means of an endothermic heat exchanger, and obtains the high-temperature fluid by heating a low-temperature fluid lower than the high-temperature fluid to a temperature higher than the low-temperature fluid by means of a heat-dissipating heat exchanger;
Feeding means for sending the high-temperature fluid obtained by the heat pump toward the high-temperature fluid utilization device;
Control means for acquiring information on the temperature of the fluid flowing through the heat-absorbing heat exchanger;
Adjusting means for adjusting the heat dissipation capacity of the heat exchanger for heat dissipation,
The control means controls the adjustment means based on the information, and causes the adjustment means to adjust the heat dissipation capability.

  Here, when the information is information related to a temperature drop of the fluid flowing through the heat absorption heat exchanger, the control means may cause the adjustment means to reduce the heat dissipation capability. Moreover, you may adjust the said heat dissipation capability by changing the temperature setting in this heat pump of the said high temperature fluid obtained with the said heat pump. The fluid flowing through the heat absorption heat exchanger includes the receiving fluid that is received by the heat absorption heat exchanger and the fluid that has passed through the heat absorption heat exchanger.

  According to the second high-temperature fluid supply system of the present invention, the control means sends the heat radiating capability of the heat radiating heat exchanger to the adjusting means based on the information on the temperature of the fluid flowing through the heat absorbing heat exchanger. To adjust. Therefore, in accordance with the amount of heat of the fluid flowing in the heat absorption heat exchanger, the amount of heat radiated by the heat dissipation heat exchanger and the amount of heat recovered from the fluid flowing in the heat absorption heat exchanger by the heat absorption heat exchanger Can be adjusted. As a result, it is possible to cope with fluctuations in the amount of heat of the fluid flowing through the heat absorption heat exchanger, and to prevent freezing of the fluid flowing through the heat absorption heat exchanger. Further, the second high-temperature fluid supply system of the present invention does not adjust the heat quantity of the receiving fluid, so that the receiving fluid does not need a plurality of heat source bodies for recovering heat, and is also versatile. It is excellent. Furthermore, by changing the set value of the temperature of the fluid flowing out from the heat-dissipating heat exchanger, it is possible to easily adjust the heat-dissipating capacity and to suppress an increase in the number of parts.

  In the first high-temperature fluid supply system of the present invention and the second high-temperature fluid supply system of the present invention, the control means controls the adjustment means based on the temperature of the received fluid as the information. There may be.

  This makes it easy to adjust the amount of heat radiated by the heat-dissipating heat exchanger and the amount of heat recovered by the heat-absorbing heat exchanger from the fluid flowing through the heat-absorbing heat exchanger based on the temperature of the receiving fluid. Become.

  Furthermore, in the first high-temperature fluid supply system of the present invention and the second high-temperature fluid supply system of the present invention, the control means uses, as the information, the temperature of the receiving fluid and the flow rate of the receiving fluid as the information. It is preferable to control the adjusting means.

  The control means controls the adjusting means based on the temperature of the receiving fluid and the flow rate of the receiving fluid, so that the adjusting means can be controlled based on the amount of heat of the receiving fluid, and the heat exchange for heat radiation It is possible to accurately adjust the amount of heat radiated from the heat exchanger and the amount of heat recovered from the fluid flowing in the heat absorbing heat exchanger.

  Further, in the first high-temperature fluid supply system of the present invention and the second high-temperature fluid supply system of the present invention, the control unit is configured to perform the information based on the temperature of the fluid that has passed through the heat absorption heat exchanger. The adjusting means may be controlled.

  In this case, the temperature of the receiving fluid may be estimated based on the temperature of the fluid that has passed through the heat absorption heat exchanger, and the control unit may control the adjustment unit.

  Furthermore, in the first high-temperature fluid supply system of the present invention and the second high-temperature fluid supply system of the present invention, the control means uses, as the information, the temperature of the fluid passing through the heat-absorbing heat exchanger and the The adjusting means may be controlled based on the flow rate of the passing fluid.

  In this case, the temperature of the receiving fluid and the flow rate of the receiving fluid may be estimated based on the temperature of the passing fluid and the flow rate of the passing fluid, and the control unit may control the adjusting unit.

Further, in the first high-temperature fluid supply system of the present invention and the second high-temperature fluid supply system of the present invention, the exhaust fluid discharged from the heat source body and having a temperature higher than the receiving fluid, and the heat absorption heat exchanger And a storage means for storing the fluid that has flowed in, and storing the fluid that has flowed in,
The heat absorption heat exchanger preferably recovers heat from a fluid stored in the storage means as the receiving fluid.

  Here, the fluid flowing through the heat-absorbing heat exchanger includes the fluid stored in the storage means and the exhaust fluid. Further, a circulation path that passes through the storage means and the heat source body may be provided. When the circulation path is provided, the fluid flowing through the circulation path is also included in the fluid flowing through the heat absorption heat exchanger. Further, the information may be an operating rate of the heat source body.

  By doing so, a rapid temperature change of the receiving fluid can be suppressed, and the temperature of the receiving fluid can be stabilized.

Furthermore, in the first high-temperature fluid supply system of the present invention and the second high-temperature fluid supply system of the present invention, mixing means for mixing outside air with the high-temperature fluid sent by the feeding means toward the high-temperature fluid utilization device. When,
And a temperature adjusting means for adjusting the temperature of the high-temperature fluid mixed with the outside air by the mixing means.

  By doing so, the mixing means can make up for the shortage of the flow rate of the high-temperature fluid sent toward the high-temperature fluid utilization device with outside air. Further, the temperature adjusting means can adjust the high temperature fluid mixed with the outside air by the mixing means to a temperature required for the high temperature fluid utilization device.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in versatility and can provide the high temperature fluid supply system which can respond to the fluctuation | variation of the calorie | heat amount of a receiving fluid.

It is a distribution diagram showing a 1st embodiment in the 1st high-temperature fluid supply system of the present invention. It is a systematic diagram which shows the structure of the heat pump shown in FIG. It is a block diagram showing an example of the circuit structure for controlling the flow volume of the external air which flows into the heat exchanger for thermal radiation in the 1st high temperature fluid supply system of this invention. It is a systematic diagram which shows 2nd Embodiment in the 1st high temperature fluid supply system of this invention. It is a systematic diagram which shows 3rd Embodiment in the 1st high temperature fluid supply system of this invention. It is a systematic diagram which shows one Embodiment in the 2nd high temperature fluid supply system of this invention. It is a block diagram showing an example of the circuit structure for controlling the thermal radiation capability of the heat exchanger for thermal radiation in the 2nd high temperature fluid supply system of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. The high-temperature fluid supply system according to an embodiment of the present invention uses a machine such as a machine tool in a factory as a heat source, heats recovered from the heat source, heats a fluid such as outside air by a heat pump, and heats the heated high-temperature fluid supply system. The fluid is sent to a high-temperature fluid utilization device such as a dryer. In the present embodiment, the case where the fluid for recovering heat from the heat source body is a liquid such as waste warm water and the fluid supplied to the high-temperature fluid utilization device is a gas will be described as an example. However, the heat is recovered from the heat source body. The fluid to be supplied may be a gas, and the fluid supplied to the high-temperature fluid utilization device may be a liquid.

  FIG. 1 is a system diagram showing a first embodiment of the first high-temperature fluid supply system of the present invention.

  As shown in FIG. 1, the first high-temperature fluid supply system 10 includes a heat pump 2, a tank 3, a damper 41, a first fan 51, a first outside air intake unit 61, and a second outside air intake unit 62. The heater 71 is provided. The heat pump 2 includes an endothermic heat exchanger 21 and a heat radiating heat exchanger 22. Detailed description of the heat pump 2 will be described later. The tank 3 stores water, and a path 81 connected from the tank 3 to the heat absorption heat exchanger 21 and a path 82 connected from the heat absorption heat exchanger 21 to the tank 3 are provided. The path 81 passes through the machine tool 73 and is provided with a pump P.

  The water stored in the tank 3 is supplied to the machine tool 73 through the path 81 by the pump P. The water supplied to the machine tool 73 recovers heat from the machine tool 73 by being used for cooling the machine tool 73 and is discharged from the machine tool 73. Hereinafter, the water discharged from the machine tool 73 may be referred to as discharged water. The discharged water is received by the endothermic heat exchanger 21 through the path 81. The machine tool 73 corresponds to an example of the heat source body in the present invention, and the discharged water corresponds to an example of the discharged fluid in the present invention.

  As will be described later, the heat received by the heat absorption heat exchanger 21 is recovered by the heat absorption heat exchanger 21, and the water that has passed through the heat absorption heat exchanger 21 flows into the tank 3 through the path 82. . Hereinafter, water that is received by the heat absorption heat exchanger 21 may be referred to as “accepting water”, and water that has passed through the heat absorption heat exchanger 21 may be referred to as “passing water”. A temperature sensor T for measuring the temperature of the incoming water is provided in a portion near the heat absorption heat exchanger 21 in the path 81. Moreover, as shown by the alternate long and short dash line in the figure, a mode in which a temperature sensor T is provided in the path 82 and the temperature of the passing water may be measured may be employed. The incoming water corresponds to an example of the receiving fluid in the present invention, and the passing water corresponds to an example of the passing fluid in the present invention. Further, the received water, the passing water, and the water stored in the tank 3 are included in the fluid flowing in the heat absorption heat exchanger in the present invention.

  The first outside air intake 61 is connected to the heat dissipation heat exchanger 22 by a first outside air intake pipe 611, and the second outside air intake 62 is connected to the heater 71 by a second outside air intake pipe 621. The heat dissipation heat exchanger 22 is connected to the second outside air intake pipe 621 by the first supply path 84. The first supply path 84 is provided with a damper 41 having a control motor CM and a first fan 51. The damper 41 has its opening degree adjusted by a control motor CM. By the action of the first fan 51, outside air is taken in from the first outside air intake unit 61, and the introduced outside air flows through the first outside air intake pipe 611 and is supplied to the heat dissipation heat exchanger 22. The heater 71 is connected to a dryer (not shown) through a second supply path 85. A second fan 52 is provided in the second supply path 85.

  FIG. 2 is a system diagram showing the structure of the heat pump shown in FIG.

  As shown in FIG. 2, the heat pump 2 includes a first circulation path 23 connected from the heat dissipation heat exchanger 22 to the heat absorption heat exchanger 21, an expansion valve 24 provided in the first circulation path 23, A second circulation path 25 connected from the heat exchanger 21 to the heat dissipation heat exchanger 22 and a compressor 26 provided in the second circulation path 25 are provided. In the heat pump 2 of the present embodiment, carbon dioxide is used as the refrigerant. Note that the refrigerant is not limited to carbon dioxide, and a medium known as a refrigerant such as chlorofluorocarbon, water, or air can be used as the refrigerant. As shown by the thick arrows in the figure, the refrigerant flows from the heat dissipation heat exchanger 22 through the first circulation path 23 to the heat absorption heat exchanger 21 and from the heat absorption heat exchanger 21 through the second circulation path 25. And flows to the heat exchanger 22 for heat dissipation. In addition, as described above, outside heat taken in from the first outside air intake 61 (see FIG. 1) is supplied to the heat-dissipating heat exchanger 22, and received water passes through the path 81 to the heat-absorbing heat exchanger 21. (See FIG. 1). The received water is heat-exchanged with the refrigerant by the heat absorption heat exchanger 21, and the heat of the received water is recovered by the refrigerant. As a result, for example, the incoming water having a temperature of about 30 ° C. is lowered to a temperature of about 25 ° C., and the water passing through the endothermic heat exchanger 21 flows into the tank 3 through the path 82 (see FIG. 1). ). In the above description, the flow direction of the refrigerant and the received water flowing through the heat absorption heat exchanger 21 is described as a parallel flow, but the flow direction of the refrigerant and the received water may be a countercurrent.

  On the other hand, the refrigerant whose heat has been recovered from the received water by the heat absorption heat exchanger 21 is compressed by the compressor 26 of the second circulation path 25 to become high-pressure and high-temperature gas and flows to the heat dissipation heat exchanger 22. . The outside air supplied to the heat-dissipating heat exchanger 22 is heat-exchanged with the high-pressure and high-temperature refrigerant by the heat-dissipating heat exchanger 22, so that the temperature set as the temperature of the fluid flowing out from the heat pump 2 as described later (for example, 100 ° C). That is, the outside air taken in from the first outside air intake 61 corresponds to an example of a low temperature fluid in the present invention, and the outside air heated by the heat radiating heat exchanger 22 corresponds to an example of a high temperature fluid in the present invention. Hereinafter, the outside air heated by the heat dissipation heat exchanger 22 may be referred to as a high-temperature gas. In addition, the refrigerant that has dissipated heat in the heat dissipation heat exchanger 22 flows through the first circulation path 23 to the expansion valve 24. When the refrigerant passes through the expansion valve 24, the refrigerant undergoes adiabatic expansion to lower the temperature and enter a low-temperature liquid state. The refrigerant in a low temperature liquid state flows to the heat absorption heat exchanger 21. FIG. 2 schematically shows the structure of the main part related to the refrigerant of the heat pump 2, and the configuration in this control is not shown, but information on the temperature of the hot gas flowing out from the heat pump 2 is shown. The heat pump 2 is also provided with a configuration that uses and controls the high-temperature gas so as to have a target set temperature.

  As shown in FIG. 1, the high-temperature gas is sent from the heat dissipation heat exchanger 22 through the first supply path 84 to the second outside air intake pipe 621 by the first fan 51. That is, the high-temperature gas is sent by a first fan 51 toward a dryer as a high-temperature fluid utilization device described later, and the first fan 51 corresponds to an example of a feeding unit in the present invention. The flow rate of the high-temperature gas flowing through the first supply path 84 is adjusted by the damper 41, thereby adjusting the flow rate of the outside air flowing through the heat dissipation heat exchanger 22. That is, the damper 41 corresponds to an example of the adjusting unit in the present invention. Further, as shown by a one-dot chain line in the figure, the inverter device INV is provided in the first fan 51, and the frequency is changed by the inverter device INV to adjust the rotation speed of the first fan 51, so that the heat dissipation heat exchanger 22 You may employ | adopt the aspect which adjusts the flow volume of the flowing external air. In the case of this aspect, the first fan 51 corresponds to an example of the adjusting means in the present invention.

  In the second outside air intake pipe 621, the outside air taken in from the second outside air intake unit 62 is mixed with the sent high-temperature gas. That is, the 2nd external air intake part 62 and the 2nd external air intake pipe 621 are equivalent to an example of the mixing means in this invention. The hot gas mixed with the outside air is supplied to the heater 71. The high temperature gas supplied to the heater 71 is heated to a predetermined temperature by the heater 71, and the heated high temperature gas is supplied by the second fan 52 to the dryer (not shown) through the second supply path 85. In the dryer, the supplied high-temperature gas is used as hot air for drying an object to be dried. That is, the heater 71 corresponds to an example of a temperature adjusting unit in the present invention, and the dryer corresponds to an example of a high-temperature fluid utilization device in the present invention.

  Next, control of the flow rate of the outside air flowing through the heat dissipation heat exchanger will be described.

  FIG. 3 is a block diagram illustrating an example of a circuit configuration for controlling the flow rate of outside air flowing through the heat dissipation heat exchanger in the first high-temperature fluid supply system of the present invention.

  In the present embodiment, as the control means for controlling the flow rate of the outside air flowing through the heat dissipation heat exchanger 22, the adjustment means 9 using a general-purpose controller is employed. From the operator, the set temperature of the incoming water for the purpose of stable operation is input in advance to the adjusting means 9, and information on the temperature of the received water is input to the adjusting means 9 from the temperature sensor T or the like during operation. For example, by PID control, the output signal is output from the adjusting means 9 to the control motor CM, and the opening degree of the damper 41 is changed. As a result of the PID control, the actual temperature of the incoming water is controlled to converge to the set temperature. In the present embodiment, the temperature of the incoming water corresponds to an example of information regarding the temperature of the fluid flowing through the heat absorption heat exchanger in the present invention.

  The adjusting means 9 is connected to each of the damper control circuit 91, the temperature sensor T, and the operation unit 92. The adjusting means 9 includes a CPU (central processing unit), a memory, and the like. The damper control circuit 91 is a circuit that controls the opening degree of the damper 41 using the control motor CM of the damper 41 in accordance with a command from the adjusting means 9. In addition, the operation unit 92 is provided with various operators for receiving operations by the operator of the high-temperature fluid supply system 10, and is generally provided integrally with a general-purpose controller.

  Subsequently, the control operation of the flow rate of the outside air flowing through the heat dissipation heat exchanger 22 will be described.

  The temperature of the high-temperature gas sent from the heat exchanger 22 for heat radiation toward the dryer is set in the heat pump 2 in advance, and the heat pump 2 is set so that the high-temperature gas flowing out from the heat pump 2 becomes the set temperature. Is controlled. More specifically, the heat pump 2 includes a setting device that sets the temperature of the high-temperature gas flowing out from the heat-dissipation heat exchanger 22, and heat dissipation heat so that the temperature of the high-temperature gas becomes the temperature of the setting device. The heat release amount of the exchanger 22 is controlled, and the heat amount required according to the heat release amount is recovered from the incoming water by the heat absorption heat exchanger 21.

  Here, for example, the received water undergoes the steps described below. Before the high-temperature fluid supply system 10 operates, the water stored in the tank 3 is supplied to the machine tool 73 through the path 81. The water supplied to the machine tool 73 is heated to, for example, a temperature of about 30 ° C. by collecting heat from the machine tool 73, and is received by the heat radiating heat exchanger 22 through the path 81 as received water.

  In the present embodiment, the temperature of the incoming water is set to an appropriate temperature in advance in the adjusting means 9 and is controlled so that the actual temperature of the incoming water becomes this set temperature. Is based on the operation described below.

  First, for example, if the temperature of the incoming water is lower than the set temperature due to a decrease in the operating rate of the machine tool 73 or the like, the opening degree of the damper 41 is closed by the adjusting means 9 more than before the temperature of the incoming water is reduced. To be operated. As a result, the flow rate of the high-temperature gas flowing out of the heat pump 2 is reduced, so that the heat dissipation amount of the heat dissipation heat exchanger 22 is also reduced, and the amount of heat recovered by the heat absorption heat exchanger 21 required according to this heat dissipation amount. Also decreases. For this reason, the temperature of the passing water rises, and since the passing water whose temperature has risen is used by the machine tool 73, the temperature of the incoming water passing through the machine tool 73 also rises and approaches the set temperature of the incoming water. This is the control action.

  On the contrary, if the temperature of the incoming water rises above the set temperature due to an increase in the operating rate of the machine tool 73 or the like, the opening degree of the damper 41 by the adjusting means 9 is more open than before the temperature of the incoming water rises. Be operated. As a result, the flow rate of the high-temperature gas flowing out from the heat pump 2 increases, so the heat dissipation amount of the heat dissipation heat exchanger 22 also increases, and the amount of heat recovered by the heat absorption heat exchanger 21 required according to this heat dissipation amount. Will also increase. For this reason, the temperature of the passing water decreases, and the passing water whose temperature has decreased is used by the machine tool 73, so that the temperature of the incoming water passing through the machine tool 73 also decreases, and approaches the set temperature of the receiving water. This is the control action.

  The above operation is the control or operation related to the damper control in FIG. In any case, the control operation by the adjusting means 9 is always continued during operation, and the actual temperature of the incoming water is controlled to converge to the set temperature. Further, the flow rate of the outside air flowing in from the second outside air intake unit 62 naturally increases as the flow rate of the high temperature gas flowing out from the heat pump 2 decreases, and conversely decreases as the flow rate of the high temperature fluid increases. Note that it is also possible to adopt a mode in which data in which the temperature of the incoming water and the opening degree of the damper 41 are determined in a one-to-one manner are experimentally obtained and the opening degree of the damper 41 is controlled based on this data.

  Moreover, when the aspect which adjusts the flow volume of the external air which flows into the heat exchanger 22 for thermal radiation by the 1st fan 51 is employ | adopted, it replaces with the damper control circuit 91 at the adjustment means 9, and is shown with a dashed-dotted line in FIG. A fan control circuit 93 is connected. The fan control circuit 93 is a circuit that controls the rotational speed of the first fan 51 using the inverter device INV of the first fan 51 in accordance with the output signal from the adjusting means 9.

  Similarly to the operation related to the damper control described above, the temperature of the incoming water is set to an appropriate temperature in the adjusting means 9 in advance, and the first temperature is set so that the actual temperature of the incoming water becomes this set temperature. The number of rotations of the fan 51 is controlled. Specifically, the operation is described below.

  For example, if the temperature of the incoming water is lower than the set temperature, the adjusting means 9 is operated to reduce the rotational speed of the first fan 51 than before the temperature of the incoming water is reduced. As a result, the flow rate of the high-temperature gas flowing out from the heat pump 2 is reduced, and the control operation is such that it approaches the set temperature of the incoming water, similar to the operation related to the damper control described above. On the other hand, if the temperature of the incoming water rises above the set temperature, the adjusting means 9 operates to increase the rotational speed of the first fan 51 before the temperature of the incoming water rises. As a result, the flow rate of the high-temperature gas flowing out from the heat pump 2 is increased, and the control operation of approaching the set temperature of the incoming water is performed in the same manner as the operation related to the damper control described above. The above operation is control or operation related to fan control in FIG.

  By controlling the flow rate of the outside air flowing through the heat-dissipating heat exchanger 22 as described above, it is possible to cope with fluctuations in the amount of heat of the incoming water flowing into the heat-absorbing heat exchanger 21, and the temperature of the passing water is excessively lowered to the freezing temperature. Can be prevented. Further, since the heat recovered from the machine tool 73 by the received water can be used in the form of an increase in the amount of high-temperature gas that flows out from the heat pump 2, the heat can be used without wasting it.

  The high-temperature gas whose flow rate is adjusted by the damper 41 flows through the first supply path 84 to the second outside air intake pipe 621. In the second outside air intake pipe 621, the outside air taken in from the second outside air intake portion 62 by the action of the second fan 52 is mixed with the high temperature gas. The first supply path 84, the second outside air intake pipe 621, and the second supply path 85 are sealed paths, and the flow rate of the high-temperature gas mixed with the outside air supplied to the heater 71 through the second outside air intake pipe 621. Is adjusted to be constant by the second fan 52. For this reason, when the temperature of the incoming water decreases and the flow rate of the outside air flowing through the heat-dissipation heat exchanger 22 decreases, the flow rate of the outside air mixed with the high temperature gas in the second outside air intake pipe 621 increases. The temperature of the hot gas mixed with the outside air supplied to the heater 71 varies depending on the flow rate and temperature of the outside air to be mixed, but is heated to a predetermined temperature by the heater 71 and sent to the dryer. Note that depending on the temperature of the outside air mixed with the high-temperature gas, the air volume required by the high-temperature fluid utilization device (not shown) may be slightly excessive or slightly insufficient. The air volume is finely adjusted using a damper between the second fan 52 and the heater 71.

  Next, another embodiment of the first high-temperature fluid supply system 10 in the present invention will be described. In the description of the other embodiments below, the differences from the first embodiment of the high-temperature fluid supply system shown in FIG. 1 will be mainly described, and the components having the same names as the names of the components described so far will be described. Are described with reference numerals used so far, and redundant description may be omitted.

  FIG. 4 is a system diagram showing a second embodiment of the first high-temperature fluid supply system of the present invention. The high-temperature fluid supply system 11 according to the second embodiment will be described with reference to FIG. 4 with reference to FIG.

  As shown in FIG. 4, the high-temperature fluid supply system 11 includes a heat exchanger 74, and the heat exchanger 74 and the tank 3 are connected by a circulation path 83. The water stored in the tank 3 flows through the circulation path 83 by the pump P and is supplied to the heat exchanger 74. The heat exchanger 74 is supplied with waste hot water discharged from a heat source body such as a machine tool (not shown). In the heat exchanger 74, heat is exchanged between the water flowing through the circulation path 83 and the waste warm water, whereby the heat of the waste warm water is recovered in the water flowing through the circulation path 83, and the heat of the waste warm water is The recovered water flows into the tank 3 through the circulation path 83. Thereby, the water stored in the tank 3 can recover heat from a heat source body such as a machine tool. The waste hot water whose heat has been recovered by the heat exchanger 74 is drained.

  Moreover, in the high temperature fluid supply system 11, the temperature sensor T is provided in the path | route 82, and the aspect which measures the temperature of passing water is employ | adopted. Similarly to the description of the operation related to the damper control described above, the temperature of the passing water is set to an appropriate temperature in advance in the adjusting means 9 so that the actual temperature of the passing water converges to the set temperature. The opening degree of the damper 41 is controlled. First, the second outside air intake unit 62 is connected to the first supply path 84 by the second outside air intake pipe 621, and the damper 41 is provided in the second outside air intake pipe 621. Further, the first fan 51 shown in FIG. 1 is not provided, and the second fan 52 corresponds to an example of the feeding means in the present invention. The first supply path 84 and the second outside air intake pipe 621 are hermetically sealed paths, and the flow rate at which the high-temperature gas mixed with outside air is supplied to the heater 71 is maintained constant by the second fan 52. Therefore, if the outside air taken in from the second outside air intake unit 62 increases, the outside air flowing into one heat pump 2 decreases. Thereby, the flow rate of the outside air supplied to the first supply path 84 through the second outside air intake pipe 621 is adjusted. Specifically, when the temperature of the passing water decreases, the opening degree of the damper 41 is increased to increase the flow rate of the outside air supplied to the first supply path 84. Since the flow rate at which the high-temperature gas mixed with the outside air is supplied to the heater 71 is kept constant, the amount of the outside air supplied from the second outside air intake pipe 621 to the first supply path 84 is increased, so that the heat is released. Since the flow rate of the outside air flowing through the heat exchanger 22 is reduced, the amount of heat recovered by the heat absorbing heat exchanger 21 is also reduced, so that the temperature of the passing water rises and approaches the set temperature. On the other hand, when the temperature of the passing water rises, the opening degree of the damper 41 is decreased to reduce the flow rate of the outside air supplied to the first supply path 84, so that the outside air flowing through the heat dissipation heat exchanger 22 is reduced. The flow rate increases. By these, the effect similar to the high temperature fluid supply system 10 of 1st Embodiment can be acquired.

  Furthermore, in the high-temperature fluid supply system 11 of the second embodiment, the waste hot water is not received by the heat pump 2. For this reason, even when the waste warm water is dirty, clear warm water always flows through the heat-absorbing heat exchanger 21. Waste dirt of waste water affects the heat exchanger 74, but the operation in operation can be facilitated by applying the heat exchanger 74 having a structure that can be easily cleaned. Furthermore, although not shown, when two heat exchangers 74 are installed in parallel and one of the heat exchangers 74 becomes dirty, the waste heat water is switched to flow through the remaining one of the heat exchangers 74. Operation that does not cause operation stop due to cleaning is also possible. In the high-temperature fluid supply system 11 of the second embodiment, the first fan is omitted to reduce the equipment cost.

  FIG. 5 is a system diagram showing a third embodiment of the first high-temperature fluid supply system of the present invention. The high temperature fluid supply system 12 of the third embodiment will be described with reference to FIG.

  As shown in FIG. 5, in the high-temperature fluid supply system 12 of the third embodiment, the damper 41 is provided in the first supply path 84. Further, the second outside air intake section 62 is connected to the first supply path 84 by a second outside air intake pipe 621, and the second outside air intake pipe 621 is provided with a second damper 42 having a control motor CM. The tank 3 includes a pump and a circulation path 83 that passes through the chiller 72 and the machine tool 73. The discharged water discharged from the machine tool 73 flows into the tank 3 through the circulation path 83. The water stored in the tank 3 flows through the path 81 by the pump P and is received by the heat-absorbing heat exchanger 21, and the passing water flows into the tank 3 through the path 82. The tank 3 corresponds to an example of a storage unit in the present invention.

  Specifically, when the temperature of the incoming water is lower than the set temperature, the opening degree of the damper 41 is operated in the closing direction by the adjusting means 9 before the temperature of the incoming water is reduced. The opening degree of the second damper 42 is operated in the opening direction. Conversely, if the temperature of the incoming water rises above the set temperature, the opening of the damper 41 is operated by the adjusting means 9 so that the opening degree of the damper 41 opens more than before the temperature of the incoming water rises. The degree is moved in the closing direction. By these, the effect similar to the high temperature fluid supply system 10 of 1st Embodiment can be acquired.

  According to the first high-temperature fluid supply systems 10, 11, and 12 described above, it is possible to cope with fluctuations in the amount of heat of the received water. In addition, since the amount of heat of the incoming water is not adjusted, there is no need for a plurality of heat source bodies such as machine tools for recovering the heat of the incoming water, and the versatility is excellent.

  Next, an embodiment of the second high-temperature fluid supply system in the present invention will be described.

  FIG. 6 is a system diagram showing an embodiment of the second high-temperature fluid supply system of the present invention. The second high-temperature fluid supply system 13 employs the basic configuration of the first high-temperature fluid supply system 10 shown in FIG. For this reason, the difference from the first high-temperature fluid supply system 10 will be mainly described, and the components having the same names as the names of the components described so far will be described with reference numerals used so far. A duplicate description may be omitted.

  As shown in FIG. 6, in the second high-temperature fluid supply system 13, a temperature sensor T and a flow sensor F are provided in the path 81. The temperature of the incoming water is measured by the temperature sensor T, and the flow rate of the incoming water is measured by the flow sensor F. By these, the calorie | heat amount of receiving water is computable. Moreover, as shown by the one-dot chain line in FIG. 6, a mode in which the temperature sensor T and the flow rate sensor F are provided in the path 82 and the heat quantity of the passing water may be calculated based on the temperature and the flow rate of the passing water may be adopted. The tank 3 is provided with a circulation path 83 that includes a pump and passes through a machine tool 73.

  A first fan 51 is provided in the first supply path 84, and the damper 41 in the first high-temperature fluid supply system 10 shown in FIG. 1 is not provided. The first supply path 84 and the second outside air intake pipe 621 are hermetically sealed paths, and a constant flow rate of outside air is taken in from the first outside air intake section 61 by the first fan 51 and sent toward the dryer. For this reason, the flow rate of the outside air flowing through the heat-dissipating heat exchanger 22 is kept constant, and a constant flow rate of high-temperature gas flows through the first supply path 84 to the second outside air intake pipe 621. In the second outside air intake pipe 621, the high temperature gas is mixed with the outside air taken from the second outside air intake portion 62 by the action of the second fan 52, and the high temperature gas mixed with the outside air is heated to a predetermined temperature by the heater 71. Then, it flows through the second supply path 85 and is sent to the dryer.

  FIG. 7 is a block diagram showing an example of a circuit configuration for controlling the heat radiation capability of the heat exchanger for heat radiation in the second high-temperature fluid supply system of the present invention.

  In this embodiment, a programmable logic controller (hereinafter abbreviated as PLC) 90 is used as the control means. Note that the PLC 90 includes a CPU, a memory, and the like. A temperature sensor T, a flow sensor F, an operation unit 92, and a setting device 94 are connected to the PLC 90. In addition, an arithmetic expression based on the temperature and flow rate of the incoming water is input to the PLC 90 in advance by the operator, and input signals from the temperature sensors T and the flow rate sensors F indicating the actual state of the incoming water are used. The operation is performed. Further, the PLC 90 stores a temperature setting value of the high temperature gas corresponding to the calculation result.

  As a result of the calculation, the temperature setting value corresponding to the calculation result is sent from the PLC 90 to the setting device 94 of the heat pump 2, and the heat pump 2 causes the high temperature gas to flow out based on the newly input temperature setting value. Specifically, the amount of heat is calculated based on the temperature difference from the actual incoming water temperature and the flow rate based on 0 ° C., and if the amount of heat falls below a preset value, the amount of heat decreases from the PLC 90. The set temperature on the lower temperature side than before is output to the setter 94. The setter 94 adjusts the heat dissipation capability of the heat dissipation heat exchanger 22 based on the new set temperature, and the heat pump 2 is controlled so as to become a high-temperature fluid with a lowered temperature. As a result, the temperature of the high-temperature fluid decreases, so the amount of heat recovered by the heat absorption heat exchanger 21 decreases, and the temperature of the passing water increases.

  On the other hand, if the amount of heat calculated by the PLC 90 increases from a preset value, the PLC 90 outputs a set temperature on the higher temperature side than that before the amount of heat increases to the setter 94. The setter 94 adjusts the heat dissipation capability of the heat exchanger 22 for heat dissipation based on the new set temperature, and the heat pump 2 is controlled so as to become a high-temperature fluid whose temperature has risen. Thereby, since the temperature of the high-temperature gas rises, the amount of heat recovered by the heat-absorbing heat exchanger 21 increases, and the temperature of the passing water decreases. That is, the amount of heat of the received water is information corresponding to the information regarding the temperature of the fluid flowing in the heat absorption heat exchanger in the present invention, and the setting device 94 corresponds to an example of the adjusting means in the present invention.

  In any case, the control operation by the PLC 90 is always continued during operation, and the set temperature of the high temperature gas is changed by the temperature and flow rate of the received water, and the actual temperature of the high temperature gas is controlled to converge to the set temperature. . By using the amount of heat based on the temperature and flow rate of the incoming water, it is possible to prevent freezing of the passing water. If the amount of heat of the incoming water is large, the heat can be used without wasting heat by increasing the temperature of the high-temperature fluid. it can. The same applies to the case where control is performed using the temperature sensor T and the flow rate sensor F provided in the path 82, as indicated by the one-dot chain line, and the temperature difference from the actual passing water temperature with respect to 0 ° C., and When the amount of heat is calculated based on the flow rate, and the amount of heat falls or rises from a preset value, a new set temperature is output from the PLC 90 to the setter, and control is performed. In this aspect, the amount of heat of the passing water corresponds to information on the temperature of the fluid flowing through the heat absorption heat exchanger in the present invention.

  The high-temperature gas heated by the heat dissipation heat exchanger 22 flows through the first supply path 84 to the second outside air intake pipe 621. In the second outside air intake pipe 621, the outside air taken in from the second outside air intake portion 62 by the second fan 52 is mixed with the high temperature gas. The temperature of the high-temperature gas varies depending on the control of the heat dissipation capability of the heat dissipation heat exchanger 22 described above. For this reason, the temperature of the hot gas mixed with the outside air supplied to the heater 71 through the second outside air intake pipe 621 also varies, but is heated to a predetermined temperature by the heater 71 and sent to the dryer. In the above description, the mode in which the set temperature of the setting device 94 of the heat pump 2 is adjusted according to the temperature and flow rate of the received water or the passing water has been described as an example. However, the setting of the heat pump 2 is simply based on the temperature of the receiving water or the passing water. The set temperature of the vessel 94 may be adjusted.

  The second high-temperature fluid supply system 13 described above can also cope with fluctuations in the amount of heat of the received water. Further, since the amount of heat of the incoming water is not adjusted, a plurality of heat source bodies such as machine tools for recovering the heat from the incoming water are not required, and the versatility is excellent. Furthermore, since it can be performed only by adjusting the setting device 94 of the heat pump 2, an increase in the number of parts on the equipment can be suppressed.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope described in the claims. For example, in the above-described embodiment, the temperature and heat quantity of the received water or the temperature and heat quantity of the passing water are used as the information regarding the temperature of the fluid flowing in the heat absorption heat exchanger, but the water stored in the tank 3 Alternatively, the temperature and the amount of heat of the water flowing through the circulation path 83 may be used as information regarding the temperature of the fluid flowing through the heat absorption heat exchanger. Further, by estimating the temperature of the incoming water based on the operating rate of the heat source body such as a machine tool, the operating rate of the heat source body can also be used as information regarding the temperature of the fluid flowing in the heat absorption heat exchanger. Furthermore, in the above-described embodiment, a so-called vapor compression type heat pump having the compressor 26 is adopted, but a so-called absorption type, adsorption type, or thermoelectric type heat pump may be adopted.

  In addition, even if it is the structural requirement contained only in each description of each embodiment of the 1st high temperature fluid supply system demonstrated above, or embodiment of the 2nd high temperature fluid supply system, the structural requirement is other than You may apply to embodiment. For example, in the first high temperature fluid supply system 10, 11, 12, the adjustment of the flow rate of the outside air flowing to the heat dissipation heat exchanger 22 and the set temperature of the setting device 94 of the heat pump 2 in the second high temperature fluid supply system 13 These adjustments may be used in combination.

10, 11, 12 First high-temperature fluid supply system 13 Second high-temperature fluid supply system 2 Heat pump 21 Heat-absorbing heat exchanger 22 Heat-dissipating heat exchanger 24 Expansion valve 26 Compressor 3 Tank 41 Damper 51 First fan 52 First 2 fans 62 2nd external air intake part 621 2nd external air intake pipe 71 Heater 73 Machine tool 9 Adjustment means 90 PLC
94 Setter F Flow sensor T Temperature sensor

Claims (8)

In a high-temperature fluid supply system that supplies a high-temperature fluid to a high-temperature fluid utilization device that uses the supplied high-temperature fluid,
A heat pump that recovers heat from the receiving fluid by means of an endothermic heat exchanger, and obtains the high-temperature fluid by heating a low-temperature fluid lower than the high-temperature fluid to a temperature higher than the low-temperature fluid by means of a heat-dissipating heat exchanger;
Feeding means for sending the high-temperature fluid obtained by the heat pump toward the high-temperature fluid utilization device;
Control means for acquiring information on the temperature of the fluid flowing through the heat-absorbing heat exchanger;
Adjusting means for adjusting the amount of fluid flowing to the heat-dissipating heat exchanger,
The high-temperature fluid supply system, wherein the control means controls the adjustment means based on the information, and causes the adjustment means to adjust the amount of fluid flowing through the heat dissipation heat exchanger. In a high-temperature fluid supply system that supplies a high-temperature fluid to a high-temperature fluid utilization device that uses the supplied high-temperature fluid,
A heat pump that recovers heat from the receiving fluid by means of an endothermic heat exchanger, and obtains the high-temperature fluid by heating a low-temperature fluid lower than the high-temperature fluid to a temperature higher than the low-temperature fluid by means of a heat-dissipating heat exchanger;
Feeding means for sending the high-temperature fluid obtained by the heat pump toward the high-temperature fluid utilization device;
Control means for acquiring information on the temperature of the fluid flowing through the heat-absorbing heat exchanger;
Adjusting means for adjusting the heat dissipation capacity of the heat exchanger for heat dissipation,
The high-temperature fluid supply system, wherein the control means controls the adjustment means based on the information, and causes the adjustment means to adjust the heat dissipation capability.   The high-temperature fluid supply system according to claim 1 or 2, wherein the control means controls the adjustment means based on the temperature of the receiving fluid as the information.   The high-temperature fluid supply system according to claim 1 or 2, wherein the control means controls the adjustment means based on the temperature of the receiving fluid and the flow rate of the receiving fluid as the information.   3. The high-temperature fluid supply system according to claim 1, wherein the control unit controls the adjustment unit based on a temperature of the fluid that has passed through the heat-absorbing heat exchanger as the information.   The said control means controls the said adjustment means based on the temperature of the passage fluid which passed the said heat absorption heat exchanger, and the flow volume of this passage fluid as said information. A high temperature fluid supply system as described. A discharge means that is discharged from the heat source body and has a higher temperature than the receiving fluid and a fluid that has passed through the heat-absorbing heat exchanger flows, and includes a storage unit that stores the flowing-in fluid;
The high-temperature fluid supply according to any one of claims 1 to 6, wherein the heat-absorbing heat exchanger recovers heat from a fluid stored in the storage means as the receiving fluid. system. Mixing means for mixing outside air with the high-temperature fluid sent by the sending means toward the high-temperature fluid utilization device;
The high-temperature fluid supply system according to any one of claims 1 to 7, further comprising a temperature adjusting unit that adjusts a temperature of a high-temperature fluid mixed with outside air by the mixing unit.

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