JP2016151388A - Heat pump type steam generation device and operation method of heat pump type steam generation device - Google Patents

Abstract

A heat pump steam generator capable of stably continuing operation even when a supply amount of hot water serving as a heat source is reduced, and an operation method of the heat pump steam generator. A heat pump type steam generator 10 includes an exhaust heat recovery device 20, a compressor 22, a condenser 24, and a throttle expander 26 connected in an annular shape to circulate a refrigerant and a condenser 24. Supplying heated water, supplying the heat pump steam generator having a steam generator 14 for generating steam by heating the water to be heated with a refrigerant, and supplying the hot water stored in the hot water tank 40 to the exhaust heat recovery unit 20 A hot water supply unit 18, and the hot water supply unit 18 supplies a hot water supply line 46 that is supplementary water different from the heat source hot water into the hot water tank 40, and the hot water level in the hot water tank 40 is a predetermined level. When it becomes less than the water level L, the hot water control part 19 which controls the water supply supply line 46 and supplies water into the hot water tank 40 is provided. [Selection] Figure 1

Description

  The present invention relates to a heat pump steam generator that recovers exhaust heat from factory wastewater or the like and generates steam, and an operation method of the heat pump steam generator.

As one of the steam generators, there is a heat pump steam generator using a heat pump device. The heat pump type steam generator recovers waste heat from waste water (hot water) such as factory waste water or used cooling water to generate steam. In other words, the heat pump type steam generator causes the evaporator of the heat pump device to function as an exhaust heat recovery unit, where exhaust heat is recovered from the exhaust hot water into a refrigerant, and the recovered water is used to collect the heated water with a condenser. Since steam is generated by heating, there is an advantage that the running cost and CO ₂ emission amount can be reduced as compared with a combustion system steam generator that generates steam using boiler equipment or the like.

  For example, Patent Document 1 discloses a configuration in which hot water serving as a heat source is stored in a heat source water tank (hot water tank) and supplied from the hot water tank to an exhaust heat recovery device in a heat pump steam generator.

JP2013-210118A

  By the way, since the supply amount of the waste heat water used as the heat source of the heat pump type steam generator as described above depends on the facility operation status of the factory, the flow rate fluctuation is large. And when the flow volume of waste heat water falls, there exists a concern that a heat pump apparatus cannot fully collect | recover heat | fever from an exhaust heat recovery device, and cannot continue a stable driving | operation.

  In this regard, the configuration of Patent Document 1 described above can cope with fluctuations in the supply amount of the exhausted warm water to some extent by providing the warm water tank that stores the warm water. However, if the supply amount of waste hot water is significantly lower than expected, the amount of hot water in the hot water tank will drop, and as a result the flow of hot water to the waste heat recovery device will drop, so the operation of the heat pump device should be continued. It becomes difficult. Therefore, in the configuration of Patent Document 1, the operation of the heat pump device is stopped when the amount of hot water in the hot water tank is reduced.

  The present invention has been made in consideration of the above-described problems of the prior art, and a heat pump steam generator capable of stably continuing operation even when the supply amount of hot water serving as a heat source is reduced, and the heat pump An object of the present invention is to provide a method for operating a steam generator.

  The heat pump steam generator according to the present invention stores a heat pump steam generator that generates steam by collecting heat from hot water and transferring the heat to the water to be heated, and heat source hot water flowing from the outside as the hot water. A heat pump steam generator comprising a hot water supply section that has a hot water tank and supplies hot water stored in the hot water tank to the heat pump steam generation section, and a hot water control section that controls the hot water supply section. The hot water supply unit includes a replenishment water supply unit that supplies replenishment water different from the heat source hot water into the hot water tank, and the hot water control unit sets the amount of hot water in the hot water tank to a first setting. When the amount is less than the amount, the supplementary water supply unit is controlled to supply the supplementary water into the hot water tank.

  In addition, the operation method of the heat pump steam generator according to the present invention uses a heat pump steam generator that generates heat by collecting heat from hot water and transferring the heat to heated water, and heat source hot water flowing from the outside Is stored in a hot water tank as the hot water, and the stored hot water is supplied to the heat pump steam generator to recover heat from the hot water to generate steam, and the operation method of the heat pump steam generator, The amount of warm water in the warm water tank is measured, and when the measured amount of warm water becomes less than the first set amount, supplementary water different from the heat source warm water is supplied into the warm water tank.

  According to such a configuration and method, even when the supply amount of the heat source hot water supplied to the hot water tank is reduced and the amount of hot water in the hot water tank is reduced, supplementary water is supplied into the hot water tank. Can recover the amount of hot water. Thereby, the flow volume of the hot water used as the heat source of the heat pump unit can be maintained, and the operation of the heat pump type steam generator can be continued stably.

  In the above configuration, the hot water control unit stops supplying supplementary water from the supplementary water supply unit when the temperature of the hot water in the hot water tank becomes lower than a first set temperature while supplying the supplementary water. It may be configured to. Thereby, it can be avoided that the temperature of the hot water in the hot water tank is remarkably lowered due to the supply of the replenishing water, and the hot water having a sufficient temperature cannot be supplied to the heat pump steam generator.

  In the above configuration, a heat pump control unit that controls the heat pump steam generation unit is provided, and the hot water control unit is configured such that the temperature of the hot water in the hot water tank is lower than a second set temperature that is equal to or lower than the first set temperature. Alternatively, a standby command may be output to the heat pump control unit. In the above configuration, the hot water control unit outputs a standby command to the heat pump control unit when the amount of hot water in the hot water tank is less than a second set amount equal to or less than the first set amount. There may be. Thereby, it is possible to prevent the operation of the heat pump unit from being continued in a state where hot water having a sufficient amount of heat is not supplied to the heat pump steam generation unit.

  In the above configuration, the supplementary water supply unit is configured to be able to individually supply at least two types of first supplementary water and second supplementary water having a temperature higher than the first supplementary water to the hot water tank as the supplementary water. There may be. Thus, for example, when the amount of hot water in the hot water tank decreases, the first supplementary water is supplied to recover the amount of hot water, and when the temperature in the hot water tank decreases, the second supplementary water is supplied. Since the temperature can be recovered, the amount of heat of the hot water serving as the heat source of the heat pump unit can be more stably maintained.

  In the above configuration, when the amount of hot water in the hot water tank becomes less than the first set amount, the hot water control unit supplies the first supplementary water to the hot water tank, and supplies the first supplementary water. When the temperature of the hot water in the hot water tank becomes lower than the first reference temperature during supply, the supply of the first supplementary water is stopped and the second supplementary water is supplied into the hot water tank. There may be. Thereby, even if it is a case where the temperature of the warm water in a warm water tank falls by supply of 1st supplementary water, temperature recovery can be aimed at rapidly by supply of 2nd supplementary water.

  The said structure WHEREIN: The structure which supplies the said 2nd supplementary water in the said warm water tank when the temperature of the warm water in the said warm water tank becomes less than 2nd reference temperature may be sufficient as the said warm water control part. Thus, the temperature can be quickly recovered by supplying the second supplementary water when the temperature of the warm water in the hot water tank is lowered regardless of whether or not the first supplementary water is supplied.

  The said structure WHEREIN: The said warm water supply part is equipped with the warm water discharge part which discharges the warm water currently stored from the lower part of the said warm water tank outside, and the said warm water control part is the said warm water at the time of starting of the said heat pump part, or an operation stop. When the temperature of the warm water in the tank is lower than a set discharge temperature, the warm water discharge unit may be controlled to discharge the warm water in the warm water tank. Thus, for example, when the heat pump steam generator has been stopped from the previous day and the water temperature in the hot water tank has dropped to about room temperature, the low-temperature water remaining in the hot water tank is drained to the outside. can do. As a result, it is possible to avoid that the heat source hot water is mixed with water having a low temperature in the hot water tank, and the temperature is greatly reduced.

  The heat pump steam generator according to the present invention is a heat pump steam generator that generates heat by collecting heat from hot water and transferring it to the water to be heated, and heat source hot water flowing from the outside as the hot water. A hot water tank for storing hot water stored in the hot water tank and supplying hot water to the heat pump steam generation unit; and replenishment water different from the heat source hot water is supplied to the hot water tank. And a replenishing water supply unit.

  According to such a configuration, even when the supply amount of the heat source hot water supplied to the hot water tank is reduced and the amount of hot water in the hot water tank is reduced, the supplementary water is supplied into the hot water tank to supply the hot water. The amount can be recovered. Thereby, the flow volume of the hot water used as the heat source of the heat pump unit can be maintained, and the operation of the heat pump type steam generator can be continued stably.

  In the above configuration, the replenishing water may be at a lower temperature than the heat source hot water. If it does so, it is not necessary to prepare high temperature hot water as supplementary water, an apparatus can be comprised at low cost, and the driving | operation at low cost is attained.

  In the above configuration, the supplementary water supply unit supplies at least a first supplementary water supply unit that supplies first supplementary water into the warm water tank as the supplementary water, and a second supplementary water that is hotter than the first supplementary water. The structure provided with the 2nd supplementary water supply part supplied in a warm water tank may be sufficient. Thereby, the 1st supplementary water or the 2nd supplementary water can be supplied according to the fluctuation | variation of the warm water amount and temperature in a warm water tank, and recovery of these warm water amount and temperature can be aimed at.

  In the above configuration, the first supplementary water may be at a lower temperature than the heat source hot water. If it does so, it is not necessary to prepare hot hot water as 1st supplementary water, an apparatus can be comprised at low cost, and the driving | operation at low cost is attained.

  The said structure WHEREIN: The structure provided with the thermal storage part which heat-stores the heat from the said heat source warm water, and transfers heat to the said supplement water or the said heat source warm water supplied later may be sufficient.

  According to the present invention, even when the supply amount of the heat source hot water supplied to the hot water tank is reduced and the amount of hot water in the hot water tank is reduced, the amount of hot water is reduced by supplying supplementary water into the hot water tank. Can be recovered. Thereby, the flow volume of the hot water used as the heat source of the heat pump unit can be maintained, and the operation of the heat pump type steam generator can be continued stably.

FIG. 1 is a configuration diagram of a heat pump type steam generator according to a first embodiment of the present invention. FIG. 2 is an explanatory diagram illustrating the relationship between the water level and temperature in the hot water tank and the open / close state of the water supply valve in the heat pump steam generator according to the first embodiment. FIG. 3 is a flowchart illustrating a control procedure in the heat pump steam generator according to the first embodiment. FIG. 4 is a configuration diagram of a heat pump steam generator according to the second embodiment of the present invention. FIG. 5 is an explanatory diagram showing the relationship between the water level and temperature in the hot water tank and the open / closed states of the water supply valve and the hot water valve in the heat pump steam generator according to the second embodiment. FIG. 6 is a flowchart illustrating a part of a control procedure in the heat pump steam generation apparatus according to the second embodiment. FIG. 7 is a flowchart illustrating the remainder of the control procedure in the heat pump steam generating apparatus according to the second embodiment. FIG. 8 is a configuration diagram of a hot water supply unit according to a modification.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a heat pump steam generator and an operation method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

1. Description of Heat Pump Steam Generating Device According to First Embodiment FIG. 1 is a configuration diagram of a heat pump steam generating device 10 according to the first embodiment of the present invention. The heat pump steam generator 10 is a system that recovers exhaust heat from warm water (exhaust warm water) such as factory effluent and used cooling water, and generates steam using the recovered exhaust heat, and the generated steam is dried. It is sent to an external steam utilization facility 12 such as a device or a sterilizer.

  As shown in FIG. 1, the heat pump type steam generation device 10 generates water vapor by evaporating water, collects heat from the hot water, and recovers heat from the hot water. The heat pump type steam generation part which has the heat pump part 16 supplied as a heat source for the generation of this steam, and the warm water supply part 18 which supplies the warm water used as the heat source of the heat pump part 16 are provided. Furthermore, the heat pump steam generation apparatus 10 includes a heat pump control unit 17 that controls the operation of the heat pump unit 16 (and the steam generation unit 14), and a hot water control unit 19 that controls the operation of the hot water supply unit 18. The heat pump control unit 17 and the hot water control unit 19 may be integrally configured as one control unit.

  The heat pump unit 16 is compressed by the exhaust heat recovery device (evaporator) 20 that recovers heat from the hot water and heats the refrigerant, the compressor 22 that compresses the refrigerant that exits the exhaust heat recovery device 20, and the compressor 22. This is a refrigeration cycle apparatus in which a condenser 24 that dissipates heat and condenses the refrigerant and a throttle expander 26 that expands the refrigerant that has exited the condenser 24 are sequentially connected in an annular manner through refrigerant piping, and the refrigerant is circulated.

  The refrigerant that has been compressed by the compressor 22 to high temperature and high pressure is cooled and condensed by exchanging heat with water (heated water) circulating through the steam generation unit 14 in the condenser 24. The refrigerant that has exited the condenser 24 is expanded by a throttle expander 26 that is an electronic expansion valve. The exhaust heat recovery device 20 absorbs heat from the hot water flowing through the hot water line 28 of the hot water supply unit 18 and evaporates. Return to.

  Under the control of the heat pump control unit 17, the heat pump unit 16 adjusts the drive rotation speed of the compressor 22 and the opening degree of the throttle expander 26 so that the refrigerant in the compression stroke becomes equal to or higher than a predetermined superheat degree, for example, during normal operation. It is operated with superheat control. This superheat degree control is executed based on detection values (suction pressure and suction temperature, discharge pressure and discharge temperature) of a pressure sensor and a temperature sensor (not shown) provided on one or both of the suction side and the discharge side of the compressor 22, for example. Is done.

  The steam generation unit 14 includes a gas-liquid separator 30 that stores water inside the container, a condenser 24 that functions as a steam generator that evaporates water using a refrigerant circulating in the heat pump unit 16 as a heat source, and a gas-liquid separator 30. And a steam compressor 32 that compresses and raises the pressure of the water vapor sent out from the air. The gas-liquid separator 30 and the condenser 24 are connected by a circulation pipe 34 that connects the lower wall of the gas-liquid separator 30 to the upper wall of the gas-liquid separator 30 via the condenser 24.

  The gas-liquid separator 30 is configured by a cylindrical container along the vertical direction, and stores water inside the container by supplying water from a water supply pipe 35 connected to a circulation pipe 34 connected to a lower wall. To do. The water supply pipe 35 introduces water from a water supply source such as a water pipe or a water tank (not shown) to the circulation pipe 34 (or the gas-liquid separator 30) by a water supply pump 36.

  Connected to the upper end wall of the gas-liquid separator 30 is a steam delivery pipe 38 for sending the steam generated by the heat pump steam generator 10 to the external steam utilization equipment 12 side. The two-phase flow in which the water and the water vapor exiting the condenser 24 are mixed is introduced into the gas-liquid separator 30 from the circulation pipe 34 on the outlet side of the condenser 24, and the water vapor after the water is separated here. It is sent out to the steam delivery pipe 38.

  The hot water supply unit 18 stores hot water serving as a heat source of the heat pump unit 16, and supplies the hot water in the hot water tank 40 to the exhaust heat recovery device 20, and warm water (drainage) from the exhaust heat recovery device 20. , A hot water pump 42 provided in the hot water line 28 between the hot water tank 40 and the exhaust heat recovery device 20, and a hot water control unit 19.

  A hot water supply line 44 for supplying hot water (heat source hot water) such as factory effluent to the hot water tank 40 and a water supply supply line (supplement water supply line) for supplying supplementary water (water supply) separately from the heat source hot water 46 is connected in parallel. When the amount of hot water in the hot water tank 40 decreases, the water supply supply line 46 supplies industrial water, tap water, etc. into the hot water tank 40 and recovers the amount of hot water by mixing it with the hot water stored inside. It is an auxiliary line for. Therefore, since the water supply supplied from the water supply supply line 46 is usually at a lower temperature than the heat source hot water supplied from the hot water supply line 44, it is not necessary to prepare high-temperature hot water as supplementary water, and the apparatus can be reduced. It can be configured at low cost and can be operated at low cost. The water supply line 46 is provided with a water supply valve 48 that is an electromagnetic on-off valve that is controlled to open and close by the hot water control unit 19. The hot water discharged from the exhaust heat recovery device 20 may be returned to the water supply supply line 46. Further, the water supply line 46 may be introduced into the hot water tank 40 after joining the hot water supply line 44.

  The hot water tank 40 is provided with a water level sensor 50 for measuring the level of hot water stored therein and a temperature sensor 52 for measuring the temperature of hot water stored therein. The measured values of the water level sensor 50 and the temperature sensor 52 are transmitted to the hot water control unit 19. As described above, in the present embodiment, the amount of hot water in the hot water tank 40 is measured by the water level measured by the water level sensor 50. For example, the hot water flowing into and out of the hot water tank 40 without the water level sensor 50 is provided. The amount of hot water in the hot water tank 40 may be measured by calculating an integrated value of the flow rate or the like.

  A drain line (hot water discharge unit) 54 is connected to the lower part of the hot water tank 40. The discharge line 54 is provided with a drain valve 56 that is an electromagnetic on-off valve that is controlled to open and close by the hot water control unit 19. An overflow discharge line 58 is connected to the upper part of the hot water tank 40. The overflow discharge line 58 is a discharge line for preventing overflow of the hot water tank 40, and discharges the hot water corresponding to the rise when the water level of the hot water in the hot water tank 40 rises to a predetermined level or more.

  A temperature sensor 60 and a flow meter 62 are provided in the hot water line 28 between the hot water pump 42 and the exhaust heat recovery device 20. The temperature sensor 60 measures the temperature of the hot water supplied to the exhaust heat recovery device 20 and transmits the measurement result to the hot water control unit 19. The flow meter 62 measures the flow rate of the hot water supplied to the exhaust heat recovery device 20 and transmits the measurement result to the hot water control unit 19.

  The hot water control unit 19 is a controller that controls the operation of the hot water supply unit 18, and can transmit and receive various control signals to and from the heat pump control unit 17 on the heat pump unit 16 side. The hot water control unit 19 controls the operation of the hot water pump 42 and the opening / closing of the water supply valve 48 based on the measurement values obtained by the water level sensor 50, the temperature sensors 52, 60 and the flow meter 62. Further, the hot water control unit 19 also controls the opening / closing of the drain valve 56 based on the measured values of the water level sensor 50 and the temperature sensor 52.

  The warm water supplied from the warm water tank 40 to the exhaust heat recovery unit 20 by the warm water supply unit 18 is, for example, water having a temperature higher than room temperature (exhaust warm water), and preferably 60 ° C. or higher, so that the heat pump unit 16 is It can be stably operated normally.

  Next, the relationship between the hot water level and temperature in the hot water tank 40 controlled by the hot water control unit 19 and the open / close state of the water supply valve 48 will be described with reference to FIG.

  FIG. 2 is an explanatory diagram showing the relationship between the water level and temperature in the hot water tank 40 and the open / closed state of the water supply valve 48. The vertical axis in FIG. 2 indicates the water level of the hot water in the hot water tank 40 measured by the water level sensor 50. The water level is higher in the order of the water level M, the water level L, and the water level LL (the amount of stored water is large). Show. 2 indicates the temperature of the hot water in the hot water tank 40 measured by the temperature sensor 52 (or the temperature sensor 60), and indicates that the temperature is higher in the order of the temperature L and the temperature LL. .

  In FIG. 2, a state below the water level LL or a state below the temperature LL indicates a state where hot water having a sufficient amount of heat cannot be supplied to the exhaust heat recovery unit 20. Therefore, the hot water control unit 19 stops the operation of the hot water pump 42 and puts it into a standby state, and notifies the heat pump control unit 17 of a standby command for setting the operation of the heat pump unit 16 to the standby state. Close control. As a result, the operation of the heat pump unit 16 is prevented from being continued in a state where hot water having a sufficient amount of heat is not supplied to the exhaust heat recovery unit 20, and the liquid phase refrigerant that could not be evaporated by the exhaust heat recovery unit 20. Can be avoided from being sucked into the compressor 22 (liquid back). That is, the water level LL and the temperature LL serve as threshold values when shifting from steady operation to standby operation.

  In FIG. 2, a state where the water level is LL or more and the temperature is LL or more and less than L indicates a state where the water level of the warm water is low or sufficiently high to some extent and the temperature is low to some extent. Therefore, the hot water control unit 19 controls to close the water supply valve 48 and continues the operation of the hot water pump 42 and the heat pump unit 16 to wait for the water level and temperature to recover.

  In FIG. 2, a state where the water level is not less than LL but less than L and the temperature is not less than L indicates a state in which the water level is low but the temperature is sufficiently high. Therefore, the hot water control unit 19 controls the opening of the water supply valve 48, continues the operation of the hot water pump 42 and the heat pump unit 16, and waits for recovery of the hot water level.

  In FIG. 2, the state above the water level L and the temperature L indicates an appropriate state in which the water level and temperature are sufficiently high, so the hot water control unit 19 maintains the previous control state for the open / close state of the water supply valve 48. However, the operation of the hot water pump 42 and the heat pump unit 16 is continued. That is, the water level L and the temperature L are threshold values indicating that the amount of warm water in the warm water tank 40 is an appropriate amount and an appropriate temperature. In addition, since the region R1 surrounded by the alternate long and short dash line in FIG. 2 is in a state below the water level LL and above the temperature L, the temperature is sufficiently high although the water level is low. Therefore, in the state of the region R1, the hot water pump 42 and the heat pump unit 16 may be controlled to stand-by operation, and the water supply valve 48 may be controlled to be opened to promote water level recovery by water supply.

  Of the states above the water level L and above the temperature L, in the state above the water level M and above the temperature L, the hot water level is sufficiently high, so the warm water control unit 19 controls the water supply valve 48 to close. That is, the water level M indicates a water level (return water level) that is a threshold value when water supply is stopped when water is supplied by the water supply valve 48. As will be described later, in the present embodiment, since the target is to maintain the water level L or higher, the water level L may be set to the return water level. However, if the water level L is the return water level, the water supply valve 48 is intermittently opened and closed when the water level fluctuates before and after the water level L. Therefore, in this embodiment, the water level M larger than the appropriate water level L is set. The return water level is set.

  Next, operation | movement of the heat pump type steam generation apparatus 10 which concerns on this embodiment is demonstrated with reference to the flowchart of FIG.

  FIG. 3 is a flowchart mainly illustrating a control procedure of the hot water supply unit 18 by the hot water control unit 19.

  First, in a state where the operation of the heat pump steam generating device 10 is stopped (stopped state), when the start switch (not shown) is turned on by the administrator or the start timer is activated, the heat pump steam generating device 10 is started. (Yes in step S1). Then, the hot water control unit 19 controls the hot water pump 42 to a standby state (off), and transmits a command (HP standby command) for setting the heat pump unit 16 to a standby state to the heat pump control unit 17 (step S2). . As a result, the heat pump unit 16 enters a standby state that is a control state in which the operation can be started as soon as the heat pump control unit 17 receives the operation command from the hot water control unit 19.

  The control system of the heat pump steam generator 10 may be other than the configuration in which the hot water control unit 19 on the hot water supply unit 18 side issues an HP standby command and an operation command to the heat pump control unit 17 on the heat pump unit 16 side, For example, the structure which the heat pump control part 17 judges as one condition of driving | running | working whether the driving | operation possible signal is output from the warm water control part 19 may be sufficient. That is, in the case of this configuration, when there is no operation enable signal from the hot water control unit 19, the heat pump control unit 17 determines that the operation conditions of the heat pump unit 16 are not met, and puts the heat pump unit 16 in a standby state. Control such as shifting is performed. Here, the standby state of the heat pump unit 16 refers to an operation state in which the amount of refrigerant circulating through the heat pump unit 16 is suppressed as compared with the normal operation state. Specifically, the circulation amount of the refrigerant flowing through the heat pump unit 16 is suppressed by means such as reducing the opening degree of the expansion expander 26 or reducing the drive rotational speed of the compressor 22. In addition, when the heat pump unit 16 is in a standby state, the steam delivery from the steam delivery pipe 38 in the steam generation unit 14 is interrupted.

  At the time of cold start, for example, when the heat pump steam generator 10 has been stopped from the previous day, the water temperature in the hot water tank 40 may be lowered to about room temperature. Therefore, the hot water control unit 19 has the temperature of the remaining hot water in the hot water tank 40 measured by the temperature sensor 52 lowered to a value lower than a predetermined value (for example, lower than the temperature LL), and the hot water tank 40 measured by the water level sensor 50. When the water level in the tank is not less than a predetermined value (for example, not less than the water level L), drainage control is performed to open the drain valve 56 for a certain time or until the water level in the hot water tank 40 becomes less than a predetermined value (for example, less than the water level LL) . Thereby, the low temperature water remaining in the hot water tank 40 can be drained to the outside, and the heat source hot water supplied from the hot water supply line 44 is mixed with the low temperature water in the hot water tank 40, It is possible to start the heat pump type steam generator 10 quickly while avoiding a significant drop in temperature. Such drainage control may be performed when the operation of the heat pump unit 16 is stopped other than during startup.

  Next, in step S3, the hot water control unit 19 determines whether or not the hot water pump 42 is in a standby state. Usually, since the warm water pump 42 is in a standby state at step S2 at the time of activation (Yes in step S3), step S4 is executed next. If the hot water pump 42 is already in operation (No in step S3), step S6 is executed next.

  In step S <b> 4, it is determined whether or not the hot water in the hot water tank 40 is in the state of the water level L or higher and the temperature L or higher based on the measured values of the water level sensor 50 and the temperature sensor 52. If the water level is equal to or higher than the water level L and the temperature is equal to or higher than the temperature L (Yes in step S4), it can be determined that the hot water in the hot water tank 40 can be circulated to the exhaust heat recovery unit 20; (Step S5). On the other hand, when the water level is not lower than L and the temperature is not higher than L (No in step S4), the process returns to step S3.

  It should be noted that the water level and temperature that are the operation start conditions of the hot water pump 42 in step S4 may be lower than the water level L and the temperature L that are the appropriate water level and temperature supplied to the exhaust heat recovery device 20, For example, the water level (L-α) or higher and the temperature (L-α) or higher may be used. That is, it is necessary to operate the hot water pump 42 prior to the heat pump unit 16 at the time of startup or the like. For this reason, assuming that the water level and temperature are recovered after the operation of the hot water pump 42 is started, the operation of the hot water pump 42 may be started under a condition lower than the appropriate water level and temperature as described above.

  Next, in step S6, the hot water control unit 19 determines whether or not the heat pump unit 16 is in a standby state. Usually, since the heat pump unit 16 is in a standby state at Step S2 at the time of activation (Yes in Step S6), Step S7 is executed next. Moreover, in the state which is already driving | running and is operating the heat pump part 16 (No of step S6), next, step S9 is performed.

  In step S <b> 7, it is determined whether or not the hot water in the hot water tank 40 is in the state of the water level L or higher and the temperature L or higher based on the measured values of the water level sensor 50 and the temperature sensor 52 (or the temperature sensor 60). When the water level is equal to or higher than the water level L and the temperature is equal to or higher than the temperature L (Yes in step S7), it can be determined that the heat pump unit 16 can be operated, and thus the heat pump control unit 17 is notified of an operation command (operation start command). Step S8). Upon receiving this operation command, the heat pump control unit 17 starts the operation of the compressor 22 to control the opening degree of the expansion expander 26, starts the operation of the steam generation unit 14, and starts generating steam. On the other hand, when the water level is not lower than the temperature L and not higher than the temperature L (No in step S7), the process returns to step S3.

  After the heat pump steam generating apparatus 10 is in the operating state in this way, the hot water control unit 19 subsequently determines whether or not the hot water in the hot water tank 40 is equal to or higher than the temperature LL (step S9). When the temperature is lower than LL (No in step S9), it can be determined that it is difficult to supply hot water having a sufficient amount of heat to the exhaust heat recovery unit 20 of the heat pump unit 16, and thus the hot water pump 42 is turned off. After the water supply valve 48 is controlled to be closed and a standby command for the heat pump unit 16 is transmitted to the heat pump control unit 17 (step S10), a standby process is returned to step S3.

  On the other hand, if the temperature is equal to or higher than the temperature LL (Yes in step S9), it is subsequently determined whether or not the hot water in the hot water tank 40 is equal to or higher than the water level LL (step S11). If it is less than the water level LL (No in step S11), it can be determined that it is difficult to supply hot water having a sufficient amount of heat to the exhaust heat recovery unit 20 of the heat pump unit 16, so the hot water pump 42 is turned off. After the water supply valve 48 is controlled to be closed and a standby command of the heat pump unit 16 is transmitted to the heat pump control unit 17 (step S12), a standby process is returned to step S3. Even if it is determined in step S11 that the water level is lower than LL, if the temperature of the hot water in the hot water tank 40 is sufficiently high, the water supply valve 48 is not closed (or opened) and water supply is continued. May be. That is, even if it is determined No in step S11, if the temperature is equal to or higher than the temperature L, it is in the state of region R1 in FIG. The procedure may return to

  On the other hand, if the water level is LL or higher (Yes in step S11), it is subsequently determined whether or not the water supply valve 48 is in a closed state (step S13). If the water supply valve 48 is in the closed state (Yes in step S13), it is then determined whether or not the hot water in the hot water tank 40 is below the water level L (step S14). If it is determined that the water level is less than L (Yes in step S14), it is then determined whether or not the hot water in the hot water tank 40 is at or above the temperature L (step S15). If it is determined in step S14 that the water level is equal to or higher than the water level L (No in step S14), it can be determined that the water level in the hot water tank 40 is sufficiently high, and thus the water supply valve 48 is maintained in the closed state. Return to S3.

  If it is determined in step S15 that the temperature is equal to or higher than the temperature L (Yes in step S15), since the temperature of the hot water in the hot water tank 40 is sufficiently high, it can be determined that the water level is low. Is controlled to replenish water in the hot water tank 40 from the water supply line 46 to restore the water level, and the process returns to step S3. If it is determined in step S15 that the temperature is less than L (No in step S15), it is determined that the water level in the hot water tank 40 is low, but the temperature is also low, so the water supply valve 48 is kept closed. The process returns to step S3.

  On the other hand, when it is determined in step S13 that the water supply valve 48 is in the open state (No in step S13), the water level recovery measure in the hot water tank 40 by the water supply from the water supply line 46 has already been taken. Since it can be determined that there is, it is determined whether or not the hot water in the hot water tank 40 is below the water level M that is the return water level (step S17). If the water level is equal to or higher than the water level M (No in step S17), it can be determined that the hot water in the hot water tank 40 has recovered to the appropriate water level, so the water supply valve 48 is closed to stop the water supply (step S18), and step S3. Return to.

  On the other hand, when it is determined that the water level is less than the water level M (Yes in step S17), it can be determined that the hot water in the hot water tank 40 has not recovered to the appropriate water level. It is determined whether or not this is the case (step S19). If the temperature is equal to or higher than the temperature L (Yes in step S19), it is determined that the temperature of the hot water in the hot water tank 40 is sufficiently high, but the water level has not reached the return water level. The process returns to step S3 while continuing the water supply. On the other hand, if it is determined that the temperature is lower than the temperature L (No in step S19), the hot water level in the hot water tank 40 does not reach the return water level, but it can be determined that the temperature is low, so the water supply valve 48 is closed. Control to stop water supply (step S18) and return to step S3.

  During the execution of the above control, when the operation end switch (not shown) is turned on by the administrator or the operation end timer is activated, the heat pump control unit 17 and the hot water control unit 19 operate the heat pump steam generator 10. Is terminated.

  As described above, the heat pump steam generation apparatus 10 according to the present embodiment includes the hot water supply unit 18 having the hot water tank 40 that stores the hot heat source water flowing from the outside as the hot water for supplying the exhaust heat recovery device 20. The hot water supply unit 18 includes a supplementary water supply unit (supply water supply line 46) for supplying supplementary water (supply water) different from the heat source warm water into the warm water tank 40, and the water level of the warm water in the warm water tank 40 is a predetermined water level. When it becomes less than L (1st setting amount), the hot water control part 19 which controls the feed water supply line 46 and supplies feed water into the warm water tank 40 is provided (step S16 in FIG. 3).

  Therefore, even if the supply amount of the heat source hot water supplied to the hot water tank 40 is reduced and the amount of hot water in the hot water tank 40 is reduced, the hot water tank 40 is supplemented with water supply from the water supply supply line 46. Can recover the amount of hot water. Thereby, the flow volume of the hot water used as the heat source of the heat pump unit 16 can be maintained, and the operation of the heat pump steam generator 10 can be stably continued.

  In addition, in the heat pump steam generator 10, the hot water control unit 19 has the temperature of the hot water in the hot water tank 40 is lower than a predetermined temperature L (first set temperature) while supplying the water from the water supply line 46. In this case, the supply of water supply is stopped (step S18 in FIG. 3). Thereby, it can be avoided that the temperature of the hot water in the hot water tank 40 is remarkably lowered due to the supply of the water supply, and the hot water having a sufficient temperature (heat amount) cannot be supplied to the exhaust heat recovery device 20.

  In addition, when the hot water in the hot water tank 40 becomes lower than the water level LL or the temperature LL, the hot water control unit 19 notifies the heat pump control unit 17 of a standby command to place the heat pump unit 16 in a standby state, and in principle, the water supply valve 48 is closed. Thereby, the operation of the heat pump unit 16 is continued in a state in which hot water having a sufficient amount of heat is not supplied to the exhaust heat recovery device 20, and it is possible to avoid problems such as liquid back in the compressor 22.

2. Description of Heat Pump Steam Generating Device According to Second Embodiment FIG. 4 is a configuration diagram of a heat pump steam generating device 10A according to the second embodiment of the present invention. In the heat pump steam generation apparatus 10A according to the second embodiment, elements having the same or similar functions and effects as those of the heat pump steam generation apparatus 10 according to the first embodiment are denoted by the same reference numerals. Detailed description will be omitted.

  As shown in FIG. 4, the heat pump steam generator 10 </ b> A is similar to the heat pump steam generator 10 shown in FIG. 1, and includes a heat pump steam generator having a steam generator 14 and a heat pump 16, and hot water supply. A unit 18, a heat pump control unit 17, and a hot water control unit 19 are provided. However, the configuration of the hot water supply unit 18 in the heat pump steam generation device 10A according to the present embodiment is changed compared to the heat pump steam generation device 10 shown in FIG. 1, and the hot water tank 40 includes a hot water supply line 44. In addition to the water supply supply line (first supplementary water supply unit) 46, a hot water supply line (second supplementary water supply unit) 64 is connected in parallel.

  The hot water supply line 64 supplies high temperature hot water (hot water) into the hot water tank 40 when the temperature of the hot water in the hot water tank 40 decreases, and mixes it with the hot water stored inside. It is an auxiliary line for recovery. Accordingly, the hot water supplied from the hot water supply line 64 is at least higher in temperature than the water supplied from the water supply supply line 46, and is, for example, hot water installed in a factory. Further, the steam flowing through the steam delivery pipe 38 may be temporarily supplied to the hot water supply line 64 by recirculation. Further, a plurality of hot water supply lines 64 may be provided, and in that case, different control may be performed for each line. The hot water supply line 64 is provided with a hot water valve 66 that is an electromagnetic open / close valve controlled to be opened and closed by the hot water control unit 19.

  Thus, the hot water supplied by the hot water supply line 64 is hot water used in other facilities in the factory or steam generated by the heat pump steam generator 10A, so that the thermal efficiency of the entire system Considering such factors, there are circumstances where it is desirable to avoid active use. Therefore, in the present embodiment, as in the case of the first embodiment, basically, the flow rate of the hot water supplied to the exhaust heat recovery device 20 by the water supply from the water supply supply line 46 is maintained, and the temperature of the hot water decreases. Only when it is necessary to recover, the hot water valve 66 is controlled to open to supply hot water.

  Next, the relationship between the hot water level and temperature in the hot water tank 40 controlled by the hot water control unit 19 and the open / closed states of the water supply valve 48 and the hot water valve 66 will be described with reference to FIG.

  FIG. 5 is an explanatory diagram showing the relationship between the water level and temperature of the hot water in the hot water tank 40 and the open / closed states of the water supply valve 48 and the hot water valve 66. The vertical axis in FIG. 5 indicates the water level of the hot water in the hot water tank 40 measured by the water level sensor 50, and indicates that the water level is higher in the order of the water level M, the water level L, and the water level LL. Further, the horizontal axis of FIG. 5 indicates the temperature of the hot water in the hot water tank 40 measured by the temperature sensor 52 (or the temperature sensor 60), and the temperature is higher in the order of the temperature M, the temperature L, and the temperature LL. Show.

  In FIG. 5, a state below the water level LL or a state below the temperature LL indicates a state where hot water having a sufficient amount of heat cannot be supplied to the exhaust heat recovery unit 20. Therefore, the hot water control unit 19 stops the operation of the hot water pump 42 and puts it into a standby state, and notifies the heat pump control unit 17 of a standby command for setting the heat pump unit 16 to the standby state. The valve 66 is closed. In addition, since the region R2 surrounded by the alternate long and short dash line in FIG. 5 is in a state below the water level L and below the temperature LL, and below the water level LL and below the temperature L, both the water level and the temperature are low. Therefore, in the state of this region R2, the hot water pump 42 and the heat pump unit 16 are controlled to stand-by operation and the water supply valve 48 is closed, while the hot water valve 66 is opened and the hot water from the hot water supply line 64 is controlled. May facilitate recovery of water level and temperature.

  In FIG. 5, a state where the water level is LL or more and the temperature is LL or more and less than L indicates a state where the water level of the hot water is low to some extent or sufficiently low and the temperature is low to some extent. Therefore, the hot water control unit 19 controls the closing of the water supply valve 48 and opens the hot water valve 66, and continues the operation of the hot water pump 42 and the heat pump unit 16 to promote the recovery of the water level and temperature of the hot water.

  In FIG. 5, a state where the water level is LL or more and less than L and the temperature is L or more indicates a state where the water level of hot water is lowered but the temperature is sufficiently high. Therefore, the hot water control unit 19 controls the opening of the water supply valve 48 and closes the hot water valve 66, continues the operation of the hot water pump 42 and the heat pump unit 16, and waits for the recovery of the hot water level.

  In FIG. 5, a state where the water level is L or more and less than M and the temperature L or more and less than M indicates an appropriate state in which the water level and temperature of the hot water are sufficiently high. The operation of the hot water pump 42 and the heat pump unit 16 is continued while maintaining the control state immediately before the open / close state. Note that the region R1 surrounded by the one-dot chain line in FIG. 5 is substantially the same as the region R1 in FIG. 2 and is in a state below the water level LL and above the temperature L, so the temperature is sufficiently high although the water level is low. Therefore, in the state of the region R1, the hot water pump 42 and the heat pump unit 16 are controlled to stand-by operation and the hot water valve 66 is controlled to be closed, while the water supply valve 48 is controlled to be opened to promote the recovery of the water level by water supply. Also good.

  Further, in the state where the water level is equal to or higher than M and the temperature is equal to or higher than L and lower than M, the water level of the hot water is sufficiently high, so the hot water control unit 19 controls the water supply valve 48 to be closed. To maintain. In the state where the water level is L or more and less than M and the temperature is M or more, the temperature of the hot water is sufficiently high, so the hot water control unit 19 controls the hot water valve 66 to be closed and the open / closed state of the water supply valve 48 is the immediately preceding control state. To maintain. That is, the temperature M indicates a temperature (recovery temperature) that serves as a threshold when the hot water is supplied by the hot water valve 66 and the supply is stopped. As in the case of the return water level, if the temperature L, which is an appropriate temperature, is set as the return temperature, a situation in which the hot water valve 66 is intermittently opened and closed when the water level fluctuates around the temperature L occurs. In the embodiment, a temperature M higher than the appropriate temperature L is set as the return temperature. Furthermore, in the state where the water level is M or higher and the temperature is M or higher, the hot water level and temperature are both sufficiently high, so the hot water control unit 19 controls the water supply valve 48 and the hot water valve 66 to be closed.

  Next, operation | movement of 10 A of heat pump type steam generators which concern on this embodiment is demonstrated with reference to the flowchart of FIGS.

  6 and 7 are flowcharts mainly illustrating the control procedure of the hot water supply unit 18 by the hot water control unit 19. Note that (A), (B), (C), and (D) in FIG. 6 indicate flows that are connected to (A), (B), (C), and (D) in FIG. 7, respectively.

  Also in the operating method of the heat pump steam generating apparatus 10A according to the present embodiment, steps S101 to S112 in FIG. 6 are the same or similar control steps as steps S1 to S12 in FIG. Omitted.

  In the standby process when it is determined in step S109 that the temperature is lower than LL (No in step S109) and in step S111 that it is determined that the temperature is lower than the water level LL (No in step S111), the hot water valve 48 and the hot water valve 48 are used. 66 is also closed and a standby command for the heat pump unit 16 is transmitted to the heat pump control unit 17 (steps S110 and S112).

  However, even if it is determined in step S109 that the temperature is lower than LL, if the water level in the hot water tank 40 is low to some extent, the hot water valve 66 is not closed (or controlled to open), May be continued. That is, even if it is determined No in step S109, if it is below the water level L, it is in the state of region R2 in FIG. The procedure may return to S103. Similarly, even if it is determined in step S111 that the temperature is lower than the water level LL, if the temperature of the hot water in the hot water tank 40 is low to some extent, the hot water valve 66 is not closed (or controlled to open), The water supply may be continued. That is, even if it is determined No in step S111, if it is lower than the temperature L, it is in the state of region R2 in FIG. The procedure may return to S103.

  In the case of this embodiment, in step S111, the hot water control unit 19 determines whether or not the hot water in the hot water tank 40 is equal to or higher than the water level LL, and if it is equal to or higher than the water level LL (Yes in step S111), then It is determined whether or not the water supply valve 48 is open (step S113). When the water supply valve 48 is in the closed state (No in step S113), it is subsequently determined whether or not the hot water valve 66 is in the open state (step S114).

  If the hot water valve 66 is in the closed state (No in step S114), it is then determined whether or not the hot water in the hot water tank 40 is lower than the temperature L (step S115). That is, when both the water supply valve 48 and the hot water valve 66 are closed and the hot water in the hot water tank 40 is less than the temperature L (Yes in step S115), the hot water valve 66 is subsequently turned on in step S116. Open control. Thereby, hot water is supplied into the hot water tank 40 from the hot water supply line 64, and the temperature of the hot water in the hot water tank 40 is recovered.

  On the other hand, when the hot water in the hot water tank 40 is equal to or higher than the temperature L (No in step S115), next, step S117 is executed to determine whether or not the hot water in the hot water tank 40 is below the water level L. If it is less than the water level L (Yes in step S117), it can be determined that the temperature of the hot water in the hot water tank 40 is sufficiently high but the water level is low. Therefore, the water supply valve 48 is controlled to open in the hot water tank 40 in step S118. Water supply is replenished from the water supply line 46 to restore the water level, and the process returns to step S103. On the other hand, if the water level is equal to or higher than the water level L (No in step S117), it can be determined that the temperature and water level of the hot water in the hot water tank 40 are sufficiently high. Return to S103.

  Further, when it is determined in step S113 that the water supply valve 48 is in the open state (Yes in step S113), a state in which the water level recovery measure in the hot water tank 40 has already been achieved by water supply from the water supply line 46. It can be judged that. Then, next, step S119 is performed and it is determined whether the warm water in the warm water tank 40 is less than the temperature L. FIG. That is, when the water supply valve 48 is open and the hot water valve 66 is closed, and the hot water in the hot water tank 40 is lower than the temperature L (Yes in step S119), if the water supply continues further, the standby state is entered. It can be determined that there is a risk that the temperature will be lower than the temperature LL, which is the transition condition of. Therefore, the water supply valve 48 is closed and the hot water valve 66 is opened to recover the temperature of the hot water in the hot water tank 40 (step S120), and the process returns to step S103.

  On the other hand, if the hot water in the hot water tank 40 is at or above the temperature L (No in step S119), then step S121 is executed to determine whether or not the hot water in the hot water tank 40 is above the water level M. If the water level is equal to or higher than the water level M (Yes in step S121), it can be determined that the hot water in the hot water tank 40 has recovered to an appropriate water level, so the water supply valve 48 is closed and water supply is stopped (step 122). Return. On the other hand, if the water level is less than M (No in step S121), the temperature of the hot water in the hot water tank 40 is sufficiently high, but it can be determined that the water level is low, so the process returns to step S103 while the water supply valve 48 is maintained open. .

  Furthermore, when it is determined in step S114 that the hot water valve 66 is in the open state (Yes in step S114), the temperature recovery measures in the hot water tank 40 by the hot water supply from the hot water supply line 64 have already been performed. It can be determined that this is the state. Then, next, step S123 is performed and it is determined whether the warm water in the warm water tank 40 is the temperature M or more. That is, when the water supply valve 48 is closed and the hot water valve 66 is open and the hot water in the hot water tank 40 is less than the temperature M (No in step S123), the hot water in the hot water tank 40 is at the appropriate temperature. Therefore, the process returns to step S103 while the hot water valve 66 is kept open.

  On the other hand, when the hot water in the hot water tank 40 is equal to or higher than the temperature M (Yes in step S123), it can be determined that the hot water in the hot water tank 40 has recovered to an appropriate temperature. Therefore, when the warm water in the warm water tank 40 is the water level L or more (Yes in Step S124), the hot water valve 66 is controlled to be closed in Step S125, and the process returns to Step S103. On the other hand, if the hot water in the hot water tank 40 is less than the water level L (No in step S124), it can be determined that the temperature of the hot water in the hot water tank 40 has recovered to the return temperature, but the water level is low. The water supply valve 48 is controlled to be closed and the water supply valve 48 is opened to recover the hot water level in the hot water tank 40 (step S126), and the process returns to step S103.

  During the execution of the above control, when the operation end switch (not shown) is turned on by the administrator or the operation end timer is activated, the heat pump control unit 17 and the hot water control unit 19 operate the heat pump steam generator 10. Is terminated.

  As described above, the heat pump steam generating apparatus 10A according to the present embodiment includes the hot water supply unit 18 having the hot water tank 40 that stores the hot source hot water flowing from the outside as the hot water for supplying the exhaust heat recovery device 20. The hot water supply unit 18 includes a supplementary water supply unit (supply water supply line 46) for supplying supplementary water (supply water) different from the heat source warm water into the warm water tank 40, and the water level of the warm water in the warm water tank 40 is a predetermined water level. When it becomes less than L (first set amount), it is provided with a hot water control unit 19 that controls the water supply line 46 to supply water into the hot water tank 40 (steps S118 and S126 in FIG. 7).

  Therefore, even if the supply amount of the heat source hot water supplied to the hot water tank 40 is reduced and the amount of hot water in the hot water tank 40 is reduced, the hot water tank 40 is supplemented with water supply from the water supply supply line 46. Can recover the amount of hot water. Thereby, the flow volume of the hot water used as the heat source of the heat pump unit 16 can be maintained, and the operation of the heat pump steam generation device 10A can be stably continued.

  Moreover, in the heat pump steam generator 10A, as the supplementary water different from the heat source hot water supplied to the hot water tank 40, a feed water supply line 46 that mainly supplies feed water for recovering the water level (first supplement water), and mainly the temperature A hot water supply line 64 for supplying hot water (second supplementary water) higher than the feed water for recovery is provided, and these feed water and hot water can be individually supplied to the hot water tank 40. As a result, when the water level in the hot water tank 40 is lowered, water supply from the water supply line 46 is supplemented to recover the water level, and when the temperature in the hot water tank 40 is lowered, the hot water supply line 64 is used. The hot water can be replenished to recover the temperature, and the amount of heat (flow rate and temperature) serving as the heat source of the heat pump unit 16 can be more stably maintained. At this time, since the water supply is at a lower temperature than the heat source hot water, it is not necessary to prepare high-temperature hot water as water supply for water level recovery, the apparatus can be configured at low cost, and operation at low cost is possible. . The hot water tank 40 may have three or more replenishing water supply units for replenishing replenishing water. In addition to the water supply supply line 46 and the hot water supply line 64, a supply line for supplying another hot water or the like may be provided. It may be provided.

  In the case of the present embodiment, the hot water control unit 19 supplies water (first supplementary water) into the hot water tank 40 when the water level of the hot water in the hot water tank 40 becomes less than the water level L (first set amount). (Steps S118 and S126 in FIG. 7) Further, when the temperature of the hot water in the hot water tank 40 becomes lower than the temperature L (first reference temperature) during the supply of the supply water, the supply of the supply water is stopped. Then, hot water (second replenishing water) is supplied into the hot water tank 40 (step S120 in FIG. 7). Thereby, even when the temperature of the hot water in the hot water tank 40 is lowered due to the supply of the water supply, the temperature can be quickly recovered by the supply of the hot water, and the transition of the heat pump unit 16 to the standby state can be performed. It can be suppressed as much as possible.

  The hot water control unit 19 supplies hot water (second supplementary water) into the hot water tank 40 when the temperature of the hot water in the hot water tank 40 becomes lower than the temperature L (second reference temperature) (FIG. 7 in steps S116 and S120). In other words, the temperature can be quickly recovered by supplying hot water when the temperature of the hot water in the hot water tank 40 is lowered regardless of whether or not the water supply is supplied.

  FIG. 8 is a configuration diagram of a hot water supply unit 70 according to a modification. Compared with the hot water supply unit 18 shown in FIG. 1, the hot water supply unit 70 includes a hot water thermometer 72 and a three-way valve 74 in the hot water supply line 44, and connects a heat storage line 76 to a branch destination of the three-way valve 74. ing.

  The hot water control unit 19 switches the three-way valve 74 to the heat storage line 76 side according to the temperature detected by the hot water thermometer 72 and passes the heat source hot water flowing through the hot water supply line 44 through the heat storage line 78 to the hot water tank 40. Whether the heat source hot water flowing through the hot water supply line 44 is introduced into the hot water tank 40 without passing through the heat storage line 78 is switched.

  The branch from the hot water supply line 44 may be configured to switch the three-way valve 74 based on the temperature detected by the temperature sensor 52 in the hot water tank 40. Thereby, the hot water thermometer 72 is abbreviate | omitted and an apparatus structure can be simplified.

  The heat storage line 76 and the feed water supply line 46 are surrounded by the heat storage section 78, and can recover heat from the heat source hot water flowing through the heat storage line 76 and transmit it to the feed water flowing through the feed water supply line 46. Further, when the temperature of the heat source hot water is unstable, the heat recovered from the heat source hot water at a high temperature may be transmitted to the heat source hot water at a low temperature supplied later. Examples of the heat transfer medium for storing heat constituting the heat storage unit 78 include water, latent heat storage material, sensible heat storage material, chemical reaction heat storage material, and the like.

  Therefore, in the configuration example of FIG. 8, the water supply is introduced into the hot water tank 40 after recovering the heat stored in the heat storage section 78, so even when water is supplied from the water supply supply line 46, the hot water in the hot water tank 40 is used. Temperature reduction can be mitigated.

  As shown in FIG. 8, the hot water supply line 64 is indicated by a two-dot chain line, and the hot water supply unit 70 having the above configuration may be applied instead of the hot water supply unit 18 shown in FIG. 4.

  Further, for example, a bypass line 80 indicated by a two-dot chain line in FIG. 8 is connected to the water supply line 46, and the measured temperature of a temperature sensor (not shown) provided in the three-way valve (not shown), the heat accumulator 78 and the water supply line is shown. Based on the above, the hot water control unit 19 may be configured such that the water supplied through the water supply supply line 46 is distributed to the bypass line 80 without being distributed to the heat storage unit 78 and is directly introduced into the hot water tank 40. It is desirable that these line switching be optimally controlled so that the amount of heat of the hot water supplied to the heat pump unit 16 becomes constant or does not fall below a preset amount of heat. Further, the lines may be distributed to the branched lines without completely switching the lines. In that case, the switching means is not limited to the three-way valve, and control may be performed using a control valve or the like as appropriate.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be freely changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10,10A Heat pump type steam generator 12 Steam utilization equipment 14 Steam generation part 16 Heat pump part 17 Heat pump control part 18,70 Hot water supply part 19 Hot water control part 20 Waste heat recovery device 22 Compressor 24 Condenser 26 Constriction expander 28 Hot water Line 40 Hot water tank 42 Hot water pump 44 Hot water supply line 46 Water supply line 48 Water supply valve 50 Water level sensor 52, 60 Temperature sensor 54 Drain line 56 Drain valve 58 Overflow discharge line 62 Flow meter 64 Hot water supply line 66 Hot water valve 76 Thermal storage Line 78 heat storage unit

Claims (14)

A heat pump steam generator that generates steam by collecting heat from the hot water and transferring it to the water to be heated;
A hot water supply unit that has a hot water tank that stores heat source hot water flowing from the outside as the hot water, and supplies the hot water stored in the hot water tank to the heat pump steam generation unit;
A hot water control unit for controlling the hot water supply unit;
A heat pump type steam generator comprising:
The hot water supply unit includes a replenishment water supply unit that supplies replenishment water different from the heat source hot water into the hot water tank,
The warm water control unit controls the supplementary water supply unit to supply the supplementary water into the warm water tank when the amount of warm water in the warm water tank becomes less than a first set amount. Heat pump steam generator. In the heat pump type steam generator according to claim 1,
The hot water control unit stops supplying the replenishing water from the replenishing water supply unit when the temperature of the hot water in the hot water tank becomes lower than a first set temperature while supplying the replenishing water. A heat pump steam generator. In the heat pump type steam generator according to claim 2,
A heat pump control unit for controlling the heat pump steam generation unit;
The hot water control unit outputs a standby command to the heat pump control unit when the temperature of the hot water in the hot water tank becomes lower than a second set temperature equal to or lower than the first set temperature. Steam generator. In the heat pump type steam generator according to claim 1,
A heat pump control unit for controlling the heat pump steam generation unit;
The hot water control unit outputs a standby command to the heat pump control unit when the amount of hot water in the hot water tank is less than a second set amount equal to or less than the first set amount. Generator. In the heat pump type steam generator according to claim 1,
The replenishing water supply unit is capable of individually supplying at least two types of first replenishing water and second replenishing water having a temperature higher than the first replenishing water to the hot water tank as the replenishing water. Heat pump steam generator. In the heat pump type steam generator according to claim 5,
The warm water control unit supplies the first supplementary water into the warm water tank when the warm water amount in the warm water tank becomes less than the first set amount,
If the temperature of the hot water in the hot water tank becomes lower than the first reference temperature during the supply of the first supplementary water, the supply of the first supplementary water is stopped and the second supplementary water is supplied to the hot water tank. A heat pump type steam generator characterized by being supplied inside. In the heat pump type steam generator according to claim 5,
The heat pump steam generator according to claim 1, wherein the hot water control unit supplies the second supplementary water into the hot water tank when the temperature of the hot water in the hot water tank becomes lower than a second reference temperature. In the heat pump type steam generator according to any one of claims 1 to 7,
The warm water supply unit includes a warm water discharge unit that discharges warm water stored from the lower part of the warm water tank to the outside.
The warm water control unit controls the warm water discharge unit to discharge warm water in the warm water tank when the temperature of warm water in the warm water tank is lower than a set discharge temperature when the heat pump unit is started or stopped. A heat pump type steam generator characterized in that: A heat pump steam generator that generates steam by collecting heat from the hot water and transferring it to the water to be heated;
A hot water supply unit that has a hot water tank that stores heat source hot water flowing from the outside as the hot water, and supplies the hot water stored in the hot water tank to the heat pump steam generation unit;
A replenishment water supply unit that supplies replenishment water different from the heat source hot water into the warm water tank;
A heat pump steam generator characterized by comprising: In the heat pump type steam generator according to claim 9,
The heat-pump steam generator, wherein the replenishing water is at a lower temperature than the heat source hot water. In the heat pump type steam generator according to claim 9,
The supplementary water supply unit includes at least a first supplementary water supply unit that supplies first supplementary water as the supplementary water into the hot water tank, and second supplementary water that is higher in temperature than the first supplementary water. A heat pump type steam generating device comprising: a second replenishing water supply unit for supplying. In the heat pump type steam generator according to claim 11,
The heat pump steam generator according to claim 1, wherein the first supplementary water has a temperature lower than that of the heat source hot water. In the heat pump type steam generator according to any one of claims 1 to 12,
The said hot water supply part is equipped with the heat storage part which accumulates the heat from the said heat source warm water, and is heat-transferred to the said supplementary water or the said heat source warm water supplied later, The heat pump type steam generation apparatus characterized by the above-mentioned. Using a heat pump type steam generator that generates steam by collecting heat from the hot water and transferring it to the heated water, the heat source hot water flowing from the outside is stored in the hot water tank as the hot water, and the stored hot water is stored in the hot water tank An operation method of a heat pump steam generator that generates steam by recovering heat from hot water by supplying it to a heat pump steam generator,
A hot water amount in the hot water tank is measured, and when the measured hot water amount is less than a first set amount, supplementary water different from the heat source hot water is supplied into the hot water tank. Operation method of heat pump steam generator.

Images