JP2017187272A - Absorption heat pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorption heat pump capable of inhibiting liquid droplets of a heated medium from being brought out to a supply destination of steam of the heated medium.SOLUTION: An absorption heat pump 1 includes: an absorber 10; a gas-liquid separator 80; heated medium liquid introduction flow passages 81, 82 for introducing liquid Wq of a heated medium in the gas-liquid separator 80 to the absorber 10; a blow valve 98 for discharging the liquid Wq of the heated medium in at least one of the gas-liquid separator 80, the heated medium liquid introduction flow passages 81, 82 and the absorber 10 to outside of the absorption heat pump 1; a liquid level detector 87 for detecting a liquid level in the gas-liquid separator 80; a heated medium liquid supply device 86 for supplying the liquid Wq of the heated medium; and a control device 90 for controlling start and stop of the heated medium liquid supply device 86 and controlling opening and closing of the blow valve 98. When a time when the liquid level detector 87 detects a high liquid level continues for a first predetermined time, the control device 90 opens the blow valve 98 until the liquid level detected by the liquid level detector 87 is lowered to less than the high liquid level.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an absorption heat pump, and more particularly to an absorption heat pump that suppresses droplets of a heated medium from being taken out toward a supply destination of steam of the heated medium.

  As a heat source machine for taking out a heated medium having a temperature higher than the driving heat source temperature, there is a second type absorption heat pump. The second type absorption heat pump mainly includes an evaporator for evaporating refrigerant liquid, an absorber for absorbing refrigerant vapor with the absorbing liquid, a regenerator for removing the refrigerant from the absorbing liquid, and a condenser for condensing the refrigerant vapor. In addition, the liquid of the heated medium can be heated by the heat generated when the absorbing liquid absorbs the refrigerant vapor in the absorber to generate the vapor of the heated medium (for example, see Patent Document 1). .

JP2013-253748A (FIG. 1 etc.)

  In an absorption heat pump that generates vapor of a medium to be heated, the liquid level may increase significantly due to bubbles generated when the liquid evaporates in the flow path of the medium to be heated that passes through the absorber. In some cases, droplets were taken out to the steam supply destination.

  In view of the above-described problems, an object of the present invention is to provide an absorption heat pump that suppresses droplets of a heated medium being taken out toward a supply destination of steam of the heated medium.

  In order to achieve the above object, the absorption heat pump according to the first aspect of the present invention, for example, as shown in FIG. 1, pumps up the heat of the introduced heat source h by an absorption heat pump cycle of an absorption liquid and a refrigerant, An absorption heat pump 1 that generates a vapor Wv of the medium to be heated; an absorber 10 that heats the medium Wq to be heated by absorption heat generated when the absorbing liquid Sa absorbs the vapor Ve of the refrigerant; A gas-liquid separator 80 for introducing the heated medium Wm and separating the introduced medium Wm into a vapor Wv and a liquid Wq; and absorbing the liquid Wq of the medium to be heated inside the gas-liquid separator 80 A heated medium liquid introduction flow path 81, 82 that leads to the vessel 10; a blow valve 98 that discharges the heated medium liquid Wq inside the gas-liquid separator 80 directly or indirectly to the outside of the absorption heat pump 1; Inside the liquid separator 80 A liquid level detector 87 for detecting the liquid level of the liquid Wq of the heated medium; a heated medium liquid supply device 86 for directly or indirectly supplying the liquid Wq of the heated medium to the gas-liquid separator 80; A control device 90 for controlling the start and stop of the medium liquid supply device 86 and the opening and closing of the blow valve 98; the control device 90 has a first predetermined time when the liquid level detector 87 detects the high liquid level. When the time continues, the blow valve 98 is opened until the liquid level of the heated medium liquid Wq inside the gas-liquid separator 80 drops to a predetermined discharge stop liquid level lower than the high liquid level.

  If comprised in this way, it can suppress that the liquid level inside a gas-liquid separator raises too much, and it suppresses that the droplet of a heated medium is taken out toward the supply destination of the vapor | steam of a heated medium. can do.

  Further, when the absorption heat pump according to the second aspect of the present invention is shown with reference to FIG. 1, for example, in the absorption heat pump 1 according to the first aspect of the present invention, the control device 90 opens the blow valve 98. The blow valve 98 is closed at a predetermined interval for a second predetermined time.

  If comprised in this way, a contaminant can be removed when a contaminant is pinched | interposed into a blow valve.

  Moreover, the absorption heat pump according to the third aspect of the present invention, for example, as shown in FIG. 1, in the absorption heat pump 1 according to the second aspect of the present invention, heats the refrigerant liquid Vf with the heat of the heat source h. An evaporator 20 that generates the refrigerant vapor Ve supplied to the absorber 10; and the absorber 10 absorbs the refrigerant vapor Ve in the absorber 10 and directly or indirectly introduces the absorbing liquid Sw having a reduced concentration. And the regenerator 30 that heats the introduced absorbing liquid Sw with the heat of the heat source h to release the refrigerant Vg; the control device 90 starts the heated medium liquid supply device 86 after starting the absorption heat pump 1 From the first predetermined number of times or less than the first predetermined number of times, or the pressure and temperature inside the gas-liquid separator 80, the absorbing liquid at the outlet of the absorber 10 w temperature and concentration, regenerator 30 At least one of the temperature and concentration of the absorbing liquid Sa at the outlet, the temperature of the refrigerant inside the evaporator 20, the pressure inside the absorber 10, or a value correlated therewith reaches a predetermined value. After the arrival, at least one of the first predetermined time and the second predetermined time is changed.

  If comprised in this way, it can open / close a blow valve appropriately according to the state of an absorption heat pump.

  Moreover, when the absorption heat pump according to the fourth aspect of the present invention is shown with reference to FIG. 1, for example, in the absorption heat pump 1 according to any one of the first to third aspects of the present invention, The control device 90 opens the blow valve 98 while the predetermined condition is satisfied when the number of times of stopping after starting the heated medium liquid supply device 86 reaches the second predetermined number of times. The count of the number of times of stopping after starting the heated medium liquid supply device 86 for the second predetermined number of times is returned to zero.

  If comprised in this way, since a blow valve is controlled based on the frequency | count of starting and stopping of a to-be-heated medium liquid supply apparatus, concentration of a to-be-heated medium liquid can be suppressed by simple control.

  Further, the absorption heat pump according to the fifth aspect of the present invention, for example, as shown in FIG. 1, pumps up the heat of the introduced heat source h by an absorption heat pump cycle of the absorption liquid and the refrigerant, and steam Vv of the medium to be heated. An absorption heat pump 1 that generates heat; an absorber 10 that heats the medium Wq to be heated with absorption heat generated when the absorbing liquid Sa absorbs the vapor Ve of the refrigerant; and a medium to be heated that is heated in the absorber 10 A gas-liquid separator 80 that introduces Wm and separates the introduced heated medium Wm into a vapor Wv and a liquid Wq; a heated medium that guides the liquid Wq of the heated medium inside the gas-liquid separator 80 to the absorber 10 Medium liquid introduction flow paths 81 and 82; a blow valve 98 that discharges the liquid Wq of the medium to be heated inside the gas-liquid separator 80 directly or indirectly to the outside of the absorption heat pump 1; the inside of the gas-liquid separator 80 Liquid Wq of the heated medium A liquid level detector 87 for detecting the liquid level; a heated medium liquid supply device 86 for supplying the liquid Wq of the heated medium directly or indirectly to the gas-liquid separator 80; and activation of the heated medium liquid supply device 86 And a control device 90 for controlling the opening and closing of the blow valve 98; and the control device 90 when the number of times of stopping after starting the heated medium liquid supply device 86 reaches a second predetermined number of times. In addition, the blow valve 98 is opened while the predetermined condition is satisfied, and the count of the number of times of stopping after starting the heated medium liquid supply device 86 for the second predetermined number of times is returned to zero.

  Conventionally, in order to prevent the concentration of impurities such as silica from increasing with the generation of heated medium vapor, the impurity concentration of the heated medium liquid is measured and blown when the impurity concentration increases. It was. However, when the absorption heat pump according to the fifth aspect of the present invention is configured, the blow valve is controlled based on the number of times of starting and stopping the heated medium liquid supply device, so that the concentrated heated medium liquid can be easily controlled. Can be suppressed.

  In addition, the absorption heat pump according to the sixth aspect of the present invention is the absorption heat pump 1 according to the fourth aspect or the fifth aspect of the present invention, as shown in FIG. An evaporator 20 that heats the liquid Vf and generates refrigerant vapor Ve that is supplied to the absorber 10; and the absorber 10 absorbs the refrigerant vapor Ve in the absorber 10 to reduce the concentration directly or from the absorber 10; A regenerator 30 that indirectly introduces and heats the introduced absorption liquid Sw with the heat of the heat source h to release the refrigerant Vg; the controller 90 supplies the heated medium liquid supply device after the absorption heat pump 1 is started. The number of times of stopping after starting 86 is greater than or equal to the first predetermined number of times and less than the first predetermined number of times, or the pressure and temperature inside the gas-liquid separator 80, the absorber 10. Temperature and concentration of absorbent w at the outlet At least one of the temperature and concentration of the absorbent Sa at the outlet of the regenerator 30, the temperature of the refrigerant inside the evaporator 20, the pressure inside the absorber 10, or a value correlated therewith is a predetermined value. At least one of the second predetermined number of times and the predetermined condition is changed before and after reaching.

  If comprised in this way, it can open / close a blow valve appropriately according to the state of an absorption heat pump.

  According to the present invention, it is possible to prevent the liquid level inside the gas-liquid separator from rising too much, and to prevent the heated medium droplet from being taken out toward the supply destination of the heated medium vapor. can do.

1 is a schematic system diagram of an absorption heat pump according to an embodiment of the present invention. It is a flowchart explaining the control which suppresses the carry over in a gas-liquid separator. It is a flowchart explaining the control which suppresses the concentration of the to-be-heated medium liquid in a gas-liquid separator. It is a partial systematic diagram of the modification of the makeup water system of the absorption heat pump concerning an embodiment of the invention. It is a typical systematic diagram of the two-stage temperature rising type absorption heat pump which concerns on the modification of embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or similar members are denoted by the same or similar reference numerals, and redundant description is omitted.

  First, an absorption heat pump 1 according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic system diagram of the absorption heat pump 1. The absorption heat pump 1 includes an absorber 10, an evaporator 20, a regenerator 30, and a condenser that constitute a main device in which an absorption heat pump cycle of the absorption liquid S (Sa, Sw) and the refrigerant V (Ve, Vg, Vf) is performed. And a gas-liquid separator 80 and a control device 90.

In the present specification, the absorption liquid is referred to as “dilute solution Sw”, “concentrated solution Sa” or the like in accordance with the property or the position on the heat pump cycle in order to facilitate distinction on the heat pump cycle. In general, the term “absorbing liquid S” is used. Similarly, regarding the refrigerant, in order to easily distinguish on the heat pump cycle, “evaporator refrigerant vapor Ve”, “regenerator refrigerant vapor Vg”, “refrigerant liquid Vf”, etc., depending on the properties and the position on the heat pump cycle. However, when the properties and the like are not asked, they are collectively referred to as “refrigerant V”. In the present embodiment, an LiBr aqueous solution is used as the absorbing liquid S (a mixture of the absorbent and the refrigerant V), and water (H ₂ O) is used as the refrigerant V. The heated medium W includes a heated medium liquid Wq that is a liquid heated medium W supplied to the absorber 10, a heated medium vapor Wv that is a gaseous heated medium, and a state in which a liquid and a gas are mixed. The mixed heating medium Wm, which is a medium to be heated, and the replenishing water Ws as a replenishing liquid, which is a heating medium replenished from outside the absorption heat pump 1, are generic names. In the present embodiment, water (H ₂ O) is used as the heating medium W.

  The absorber 10 includes therein a heat transfer tube 12 that forms a flow path of the heated medium W and a concentrated solution spray nozzle 13 that sprays the concentrated solution Sa. The absorber 10 generates heat of absorption when the concentrated solution Sa is sprayed from the concentrated solution spray nozzle 13 and the concentrated solution Sa absorbs the evaporator refrigerant vapor Ve. The heated medium W flowing through the heat transfer tube 12 receives this absorbed heat so that the heated medium W is heated.

  The evaporator 20 has a heat source pipe 22 constituting a flow path of the heat source hot water h as a heat source fluid in the evaporator can body 21. The evaporator 20 does not have a nozzle for spraying the refrigerant liquid Vf inside the evaporator can body 21. For this reason, the heat source pipe 22 is disposed so as to be immersed in the refrigerant liquid Vf stored in the evaporator can body 21 (full liquid evaporator). In the absorption heat pump, since the pressure in the evaporator is higher than that of the absorption refrigerator, it is possible to obtain a desired refrigerant vapor even in a configuration in which the heat source tube is immersed in the refrigerant liquid. The evaporator 20 is configured so that the refrigerant liquid Vf around the heat source pipe 22 is evaporated by the heat of the heat source hot water h flowing in the heat source pipe 22 to generate the evaporator refrigerant vapor Ve. A refrigerant liquid pipe 45 that supplies the refrigerant liquid Vf into the evaporator can body 21 is connected to the lower portion of the evaporator can body 21.

  The absorber 10 and the evaporator 20 are in communication with each other. By connecting the absorber 10 and the evaporator 20, the evaporator refrigerant vapor Ve generated in the evaporator 20 can be supplied to the absorber 10.

  The regenerator 30 has a heat source pipe 32 for flowing heat source hot water h as a heat source fluid for heating the dilute solution Sw, and a dilute solution spray nozzle 33 for spraying the dilute solution Sw. The heat source hot water h flowing in the heat source pipe 32 is the same fluid as the heat source hot water h flowing in the heat source pipe 22 in the present embodiment, but may be a different fluid. The regenerator 30 heats the dilute solution Sw sprayed from the dilute solution spray nozzle 33 to the heat source hot water h, so that the concentrated solution Sa having an increased concentration is generated from the dilute solution Sw by evaporating the refrigerant V. It is configured. The refrigerant V evaporated from the dilute solution Sw is configured to move to the condenser 40 as a regenerator refrigerant vapor Vg.

  The condenser 40 has a cooling water pipe 42 through which the cooling water c as a cooling medium flows inside the condenser can body 41. The condenser 40 is configured to introduce the regenerator refrigerant vapor Vg generated in the regenerator 30, cool it with the cooling water c, and condense it. The regenerator 30 and the condenser 40 are integrally formed with a can body of the regenerator and a condenser can body 41 so as to communicate with each other. By connecting the regenerator 30 and the condenser 40, the regenerator refrigerant vapor Vg generated in the regenerator 30 can be supplied to the condenser 40.

  The portion where the concentrated solution Sa of the regenerator 30 is stored and the concentrated solution spray nozzle 13 of the absorber 10 are connected by a concentrated solution pipe 35 through which the concentrated solution Sa flows. The concentrated solution pipe 35 is provided with a solution pump 35p that pumps the concentrated solution Sa. The portion of the absorber 10 where the dilute solution Sw is stored and the dilute solution spray nozzle 33 are connected by a dilute solution tube 36 through which the dilute solution Sw flows. The concentrated solution tube 35 and the diluted solution tube 36 are provided with a solution heat exchanger 38 that performs heat exchange between the concentrated solution Sa and the diluted solution Sw. The portion of the condenser 40 where the refrigerant liquid Vf is stored and the lower portion (typically the bottom portion) of the evaporator can body 21 are connected by a refrigerant liquid pipe 45 through which the refrigerant liquid Vf flows. The refrigerant liquid pipe 45 is provided with a refrigerant pump 46 that pumps the refrigerant liquid Vf.

  A heat source hot water introduction pipe 51 for introducing the heat source hot water h into the heat source pipe 22 is connected to one end of the heat source pipe 22 of the evaporator 20. The other end of the heat source pipe 22 and one end of the heat source pipe 32 of the regenerator are connected by a heat source hot water communication pipe 52. The other end of the heat source pipe 32 is connected to a heat source hot water outflow pipe 53 that guides the heat source hot water h to the outside of the absorption heat pump 1. The heat source hot water outlet pipe 53 is provided with a heat source hot water switching valve 53v capable of adjusting the flow rate of the heat source hot water h flowing inside. A heat source warm water bypass pipe 55 is provided between the heat source warm water outlet pipe 53 and the heat source warm water introduction pipe 51 on the downstream side of the heat source warm water switching valve 53v. The heat source hot water bypass pipe 55 is provided with a bypass valve 55v that can open and close the flow path.

  The gas-liquid separator 80 is a device that introduces the heated medium W that flows through the heat transfer tube 12 of the absorber 10 and separates the heated medium vapor Wv and the heated medium liquid Wq. The gas-liquid separator 80 is connected to a lower part (typically the bottom part) of a separation liquid pipe 81 through which the separated heated medium liquid Wq flows out from the gas-liquid separator 80. The other end of the separation liquid pipe 81 is connected to a heated medium liquid pipe 82 that guides the heated medium liquid Wq to the heat transfer pipe 12. In the present embodiment, the separated liquid pipe 81 and the heated medium liquid pipe 82 constitute a heated medium liquid introduction flow path. The other end of the heat transfer tube 12 and the gas phase portion of the gas-liquid separator 80 are connected by a heated medium tube 84 after heating that guides the heated medium W to the gas-liquid separator 80. Further, the gas-liquid separator 80 has a heated medium vapor pipe 89 as a supply vapor pipe that guides the separated heated medium vapor Wv to the outside of the absorption heat pump 1 toward the demand destination (typically, the top portion). )It is connected to the. Further, a replenishment water pipe 85 is provided for introducing replenishment water Ws for supplementing the medium W to be heated, which is mainly supplied as vapor outside the absorption heat pump 1, from outside the absorption heat pump 1. The make-up water pipe 85 is connected to a connection portion between the separation liquid pipe 81 and the heated medium liquid pipe 82 and is configured to join the make-up water Ws to the heated medium liquid Wq flowing through the separation liquid pipe 81. ing. The makeup water pipe 85 is provided with a makeup water pump 86 that pumps the makeup water Ws toward the absorber 10. The makeup water pump 86 corresponds to a heated medium liquid supply device.

  The heated medium vapor pipe 89 in the vicinity of the gas-liquid separator 80 is provided with a pressure gauge 93 as a pressure detector that detects the pressure inside the gas-liquid separator 80. A heated medium vapor pipe 89 downstream of the pressure gauge 93 is provided with a pressure control valve 99 for adjusting the pressure of the heated medium vapor Wv supplied to the outside of the absorption heat pump 1. A heated medium vapor pipe 89 between the pressure gauge 93 and the pressure control valve 99 is provided with a safety valve 88. The safety valve 88 increases the pressure by mechanically opening the gas-liquid separator 80 when the pressure inside the gas-liquid separator 80 exceeds the target operating pressure and becomes too high (for example, the maximum operating pressure of the gas-liquid separator 80). It suppresses.

  The gas-liquid separator 80 is also provided with a liquid level detector 87 that detects the liquid level of the heated medium liquid Wq in the gas-liquid separator 80. The liquid level detector 87 includes a high level electrode 87H that detects a high liquid level and an arbitrary liquid level near the high liquid level, a low level electrode 87L that detects an arbitrary liquid level near the low liquid level and the low liquid level, and a high level. A liquid level control cylinder 87c that accommodates the electrode 87H and the low level electrode 87L. The liquid level control cylinder 87c has substantially the same height as the gas-liquid separator 80, is disposed at substantially the same height as the gas-liquid separator 80, and communicates at least in two places, the upper part and the lower part. The liquid level of the heated medium liquid Wq in the separator 80 can be expressed inside the liquid level control cylinder 87c. A blow pipe 95 that guides the heated medium liquid Wq in the gas-liquid separator 80 to the outside of the absorption heat pump 1 is connected to the lower part (typically the bottom part) of the gas-liquid separator 80. In the blow pipe 95, a stop valve 96, a strainer 97, and a blow valve 98 are arranged in this order from the gas-liquid separator 80 to the outside. The blow valve 98 is a valve that, when opened, discharges the heated medium liquid Wq in the gas-liquid separator 80 to the outside of the absorption heat pump 1. The blow valve 98 is typically one that performs an opening / closing operation (ON-OFF operation), but one that can adjust the opening degree may be used.

  The control device 90 is a device that controls the operation of the absorption heat pump 1. The control device 90 is connected to the solution pump 35p, the refrigerant pump 46, and the make-up water pump 86 by signal cables, respectively, and is configured to be able to control the start and stop of each pump 35p, 46, 86. The control device 90 is connected to the heat source / hot water switching valve 53v and the bypass valve 55v by a signal cable, and is configured to be able to adjust the opening degree of each of the valves 53v and 55v. The control device 90 is connected to the liquid level detector 87 with a signal cable, and is configured to receive the liquid level detected by the liquid level detector 87 as a signal. The control device 90 is connected to the pressure gauge 93 via a signal cable, and is configured to receive the pressure detected by the pressure gauge 93 as a signal. The control device 90 is connected to the blow valve 98 via a signal cable, and is configured to be able to control the opening and closing of the blow valve 98. The control device 90 is connected to the pressure control valve 99 via a signal cable, and is configured to be able to adjust the opening degree of the pressure control valve 99.

  With continued reference to FIG. 1, the operation of the absorption heat pump 1 will be described. Usually, the heat source hot water switching valve 53v and the pressure control valve 99 are opened, and the bypass valve 55v and the blow valve 98 are closed. First, the refrigerant side cycle will be described. In the condenser 40, the regenerator refrigerant vapor Vg evaporated in the regenerator 30 is received, cooled and condensed with the cooling water c flowing through the cooling water pipe 42, and the refrigerant liquid Vf is obtained. The condensed refrigerant liquid Vf is sent to the evaporator can body 21 by the refrigerant pump 46. The refrigerant liquid Vf sent to the evaporator can body 21 is heated by the heat source hot water h flowing in the heat source pipe 22 and evaporated to become the evaporator refrigerant vapor Ve. The evaporator refrigerant vapor Ve generated in the evaporator 20 moves to the absorber 10 that communicates with the evaporator 20.

  Next, the solution side cycle will be described. In the absorber 10, the concentrated solution Sa is sprayed from the concentrated solution spray nozzle 13, and the sprayed concentrated solution Sa absorbs the evaporator refrigerant vapor Ve that has moved from the evaporator 20. The concentrated solution Sa that has absorbed the evaporator refrigerant vapor Ve is reduced in concentration to become a diluted solution Sw. In the absorber 10, heat of absorption is generated when the concentrated solution Sa absorbs the evaporator refrigerant vapor Ve. The heated medium W flowing through the heat transfer tube 12 is heated by the absorbed heat. The concentrated solution Sa that has absorbed the evaporator refrigerant vapor Ve by the absorber 10 is reduced in concentration to become the diluted solution Sw, and is stored in the lower part of the absorber 10. The stored diluted solution Sw flows through the diluted solution tube 36 toward the regenerator 30 due to the difference in internal pressure between the absorber 10 and the regenerator 30, and heat-exchanges with the concentrated solution Sa in the solution heat exchanger 38, so that the temperature is Decreases and reaches the regenerator 30.

  The dilute solution Sw sent to the regenerator 30 is sprayed from the dilute solution spray nozzle 33, heated by the heat source hot water h (about about 80 ° C. in the present embodiment) flowing through the heat source pipe 32, and sprayed dilute solution Sw. The refrigerant inside evaporates into a concentrated solution Sa and is stored in the lower part of the regenerator 30. On the other hand, the refrigerant V evaporated from the dilute solution Sw moves to the condenser 40 as a regenerator refrigerant vapor Vg. The concentrated solution Sa stored in the lower part of the regenerator 30 is pumped to the concentrated solution spray nozzle 13 of the absorber 10 through the concentrated solution tube 35 by the solution pump 35p. The concentrated solution Sa flowing through the concentrated solution pipe 35 is heat-exchanged with the diluted solution Sw by the solution heat exchanger 38 and rises in temperature, and then flows into the absorber 10 and is sprayed from the concentrated solution spray nozzle 13. The concentrated solution Sa is pressurized by the solution pump 35 p and enters the absorber 10, and the temperature rises as the evaporator refrigerant vapor Ve is absorbed in the absorber 10. The concentrated solution Sa returned to the absorber 10 absorbs the evaporator refrigerant vapor Ve and thereafter repeats the same cycle.

  In the process in which the absorption liquid S and the refrigerant V perform the absorption heat pump cycle as described above, the heated medium liquid Wq is heated by the absorption heat generated when the concentrated solution Sa absorbs the evaporator refrigerant vapor Ve in the absorber 10. Thus, it becomes wet steam (mixed heated medium Wm) and is guided to the gas-liquid separator 80. The mixed heated medium Wm flowing into the gas-liquid separator 80 is separated into heated medium vapor Wv and heated medium liquid Wq. The heated medium vapor Wv separated by the gas-liquid separator 80 flows out to the heated medium vapor pipe 89 and is supplied to a steam utilization place (a customer) outside the absorption heat pump 1. That is, the heated medium vapor Wv is taken out from the absorption heat pump. Thus, the absorption heat pump 1 is configured as a second type absorption heat pump that can take out the heated medium W that is equal to or higher than the temperature of the drive heat source. On the other hand, the heated medium liquid Wq separated by the gas-liquid separator 80 flows out to the separated liquid pipe 81, flows through the heated medium liquid pipe 82, and is supplied into the heat transfer pipe 12. At this time, when the replenishing water Ws flows through the replenishing water pipe 85, the replenishing water Ws joins the heated medium liquid Wq flowing into the heated medium liquid pipe 82 from the separation liquid pipe 81, and becomes the heated medium liquid Wq. It is supplied into the heat transfer tube 12. Typically, the medium to be heated W supplied to the outside as the medium to be heated Wv and the part to be heated from the blow pipe 95 are supplied from the outside of the absorption heat pump 1 as make-up water Ws. The heated medium liquid Wq in the gas-liquid separator 80 is discharged to the outside of the absorption heat pump 1 through the blow pipe 95 when the blow valve 98 is opened and closed in the manner described later. In the present embodiment, the replenishment water pump 86 is activated when the liquid level detector 87 detects a low liquid level (low liquid level detection is an activation condition of the replenishment water pump 86), and the liquid level detector 87 is a high liquid level. When the position is detected, the makeup water pump 86 is stopped (high liquid level detection is a stop condition of the makeup water pump 86). In addition, each apparatus which comprises the absorption heat pump 1 mentioned above is controlled by the control apparatus 90. FIG.

  In the absorption heat pump 1 acting as described above, if the liquid level of the heated medium liquid Wq in the gas-liquid separator 80 is too high, the heated medium liquid Wq flowing through the heated medium vapor pipe 89 is transferred to the heated medium liquid Wq. In some cases, the droplet of the heated medium liquid Wq is taken out (carry over) to the supply destination of the heated medium vapor Wv. In the absorption heat pump 1 according to the present embodiment, the following control is performed in order to avoid such inconvenience.

  FIG. 2 is a flowchart for explaining control for suppressing carryover due to the high liquid level in the gas-liquid separator 80. In the following description of control, when referring to the configuration of the absorption heat pump 1, FIG. 1 will be referred to as appropriate. In this control, first, the control device 90 determines whether or not the liquid level detector 87 has detected a high liquid level (S1). The high liquid level is an arbitrary liquid level below the upper limit liquid level, and is preferably close to the upper limit liquid level from the viewpoint of reducing the opening / closing frequency of the blow valve 98 and the on / off frequency of the makeup water pump 86. From the viewpoint of absorbing fluctuations in the liquid level when the position is unstable, it is preferable to be far from the upper limit liquid level. If the upper limit liquid level is higher than this, the possibility that carryover will occur is high. In the step (S1) of determining whether or not the liquid level detector 87 has detected the high liquid level, if the high liquid level is not detected, it is determined again whether or not the liquid level detector 87 has detected the high liquid level. The process returns to the determining step (S1).

  In the step (S1) of determining whether or not the liquid level detector 87 has detected a high liquid level, if the high liquid level is detected, the control device 90 determines whether the high liquid level has continued for a first predetermined time. It is determined whether or not (S2). The first predetermined time is an arbitrary time when the possibility of reaching the upper limit liquid level after the liquid level detector 87 detects the high liquid level is increased, and is related to the set value of the high liquid level. The first predetermined time may be set to 0 seconds. In this case, the first predetermined time is continued when the high liquid level is substantially detected. In the step (S2) of determining whether or not the high liquid level has continued for the first predetermined time, if the liquid level detector 87 has detected the high liquid level again if the high liquid level has not continued for the first predetermined time It returns to the process (S1) which judges whether or not. On the other hand, when continuing for the 1st predetermined time, the control apparatus 90 opens the blow valve 98 (S3). When the blow valve 98 is opened, the heated medium liquid Wq in the gas-liquid separator 80 flows out to the blow pipe 95 and is discharged out of the absorption heat pump 1, and the liquid level of the heated medium liquid Wq in the gas-liquid separator 80 Decreases. When the liquid level decreases, the possibility of carry-over is reduced.

  When the blow valve 98 is open (S3), the control device 90 preferably closes the blow valve 98 for a second predetermined time at predetermined intervals. By repeatedly opening and closing the blow valve 98 in this manner, foreign matters can be removed when foreign matters are caught in the blow valve 98. In view of such a purpose, the second predetermined time and the predetermined interval are determined so that the blow valve 98 is opened and closed to such an extent that the foreign material can be removed when the foreign material is caught in the blow valve 98. do it. Closing the blow valve 98 for a second predetermined time at a predetermined interval is a secondary operation with the blow valve 98 open, and the blow valve 98 is open. Included in the process.

  When the blow valve 98 is opened (S3), the control device 90 determines whether or not the liquid level of the heated medium liquid Wq in the gas-liquid separator 80 has detected the first predetermined liquid level (S4). ). The first predetermined liquid level is an arbitrary liquid level lower than the high liquid level, and is closer to the high liquid level from the viewpoint of suppressing the amount of the heated medium liquid Wq blown through the blow valve 98. From the viewpoint of reducing the frequency of opening and closing the blow valve 98, it is preferable to be close to a low liquid level. The first predetermined liquid level corresponds to a predetermined discharge stop liquid level. The first predetermined liquid level is preferably detected by the liquid level detector 87, and the liquid level below the high liquid level detected by the high electrode 87H or the liquid level below the high liquid level by the high electrode 87H is detected in advance. It is good also as a liquid level when it detects continuously only for the fixed time. Note that the first predetermined liquid level may be the liquid level when a predetermined time has elapsed after the blow valve 98 is opened instead of the liquid level detected by the liquid level detector 87. In the step (S4) of determining whether or not the liquid level of the heated medium liquid Wq in the gas-liquid separator 80 has detected the first predetermined liquid level, the first predetermined liquid level is not detected. In this case, that is, when the liquid level is higher than the first predetermined liquid level, whether or not the liquid level of the heated medium liquid Wq in the gas-liquid separator 80 has detected the first predetermined liquid level again. The process returns to the step of determining (S4). On the other hand, when the liquid level of the heated medium liquid Wq is lowered and the first predetermined liquid level is detected, that is, when the liquid level is equal to or lower than the first predetermined liquid level, the blow valve 98 is closed (S5). . When the blow valve 98 is closed, the process returns to the step (S1) of determining whether or not the liquid level detector 87 has detected a high liquid level, and thereafter the above-described flow is repeated. As described above, when the time that the liquid level detector 87 detects the high liquid level continues for the first predetermined time, the blow valve 98 is opened, and the liquid level of the heated medium liquid Wq in the gas-liquid separator 80 is determined. Carryover can be avoided by closing the blow valve 98 when the first predetermined liquid level is reached.

  In the flow shown in FIG. 2, the first predetermined time and / or the second predetermined time is the number of times (hereinafter referred to as “the number of operations”) that the makeup water pump 86 has stopped since the first predetermined time. You may change with the case where it is more than the number of times, and the case where it is less than the first predetermined number of times. Typically, when the number of operations of the makeup water pump 86 is equal to or greater than the first predetermined number of times, the absorption heat pump 1 is in a steady operation, and when it is less than the first predetermined number of times, the absorption heat pump 1 is activated. is there. That is, the first predetermined time and / or the second predetermined time may be changed between the startup stage of the absorption heat pump 1 and the steady operation. At the start-up stage of the absorption heat pump 1, the heated medium liquid Wq is supplied into the heat transfer pipe 12, the heat source hot water h is introduced into the heat source pipes 22 and 32, and heat input starts, and the heated medium liquid Wq is heated and boiled. This is a stage where the state of the heated medium liquid Wq is changed by increasing the pressure for the first time, and the liquid level of the heated medium liquid Wq in the gas-liquid separator 80 tends to become unstable. If the liquid level is unstable, the upper limit liquid level may be suddenly exceeded. Therefore, the first predetermined time is set short and the blow valve 98 is opened early to lower the liquid level. The predetermined time of 2 may be set short and the state where the blow valve 98 is opened may be lengthened. Conversely, during steady operation where the liquid level is stable, there is a low possibility of suddenly exceeding the upper limit liquid level, so the first predetermined time and the second predetermined time are set longer and the blow valve 98 The opening and closing frequency should be reduced. When the generated pressure of the heated medium vapor Wv decreases by a predetermined pressure from the pressure during steady operation, it is determined that the absorption heat pump 1 has entered a stop operation, and the number of operations of the makeup water pump 86 is the first. It is preferable to reset the count of the number of times of operation when determining whether or not the predetermined number of times has been reached, because this count starts from zero in the next operation of the absorption heat pump 1.

  As described above, during the control for suppressing the carry-over in the gas-liquid separator 80, the portion supplied to the outside as the heated medium vapor Wv and the blow pipe 95 are discharged as described above. A part of the medium to be heated W is supplied from the outside of the absorption heat pump 1 as makeup water Ws by the operation of the makeup water pump 86. In general, when the makeup water Ws is introduced into the absorption heat pump 1, impurities such as silica, calcium, magnesium and the like are brought into the absorption heat pump 1 together with the makeup water Ws. Since the heated medium vapor Wv supplied to the outside usually does not contain impurities, when the cumulative amount of heated medium vapor Wv increases, the impurities in the heated medium liquid Wq in the gas-liquid separator 80 The concentration is increased (the heated medium liquid Wq is concentrated), causing carryover due to the impurity concentration of the heated medium liquid Wq, or scale due to impurities is deposited on the inner surface of the heat transfer tube 12 of the absorber 10. There is a case. In order to avoid such an inconvenience, the absorption heat pump 1 according to the present embodiment maintains the impurity concentration in the heated medium liquid Wq within a predetermined reference concentration range. When the heated medium liquid Wq is discharged from the blow tube 95, impurities are also discharged together. However, in the control for suppressing carryover shown in FIG. 2, the heated medium liquid Wq contains a large amount of impurities at the time of startup. In many cases, the impurities are not discharged, and during steady operation, the liquid level is often stable, so the blow valve 98 does not often operate (opens) and The amount of impurities discharged from the tube 95 is not large. Therefore, in the absorption heat pump 1 according to the present embodiment, the following control is performed in order to suppress the concentration of the heated medium liquid Wq and maintain the impurity concentration in the heated medium liquid Wq within the reference concentration range. To do.

  FIG. 3 is a flowchart for explaining control for suppressing the concentration of the heated medium liquid Wq in the gas-liquid separator 80. In the following description of control, when referring to the configuration of the absorption heat pump 1, FIG. 1 will be referred to as appropriate. In this control, first, the control device 90 determines whether or not the number of operations of the makeup water pump 86 has reached the second predetermined number (S11). The second predetermined number of times is the integration of makeup water Ws to such an extent that the heated medium liquid Wq is preferably discharged from the gas-liquid separator 80 in order to avoid the concentration of the heated medium liquid Wq in the gas-liquid separator 80. This is the number of times the amount is supplied, and the integrated amount of the makeup water Ws is approximately the amount corresponding to the integrated generation amount of the heated medium vapor Wv. In the step (S11) of determining whether or not the number of operations of the makeup water pump 86 has reached the second predetermined number of times, when the second number of predetermined times has not been reached, the operation of the makeup water pump 86 is performed again. The process returns to the step of determining whether or not the number of times has reached the second predetermined number (S11).

  When the second predetermined number of times is reached in the step of determining whether or not the number of times of operation of the makeup water pump 86 has reached the second predetermined number (S11), the control device 90 causes the liquid level detector 87 to reach the second predetermined number. It is determined whether or not the second predetermined liquid level has been detected (S12). The second predetermined liquid level is an arbitrary liquid level equal to or higher than the low liquid level. From the viewpoint of suppressing the amount of the heated medium liquid Wq blown through the blow valve 98, the second predetermined liquid level is a high liquid level or a high liquid level. From the viewpoint of reducing the opening / closing frequency of the blow valve 98, it is preferable to be close to a low liquid level. Alternatively, the second predetermined liquid level may be equal to or lower than the first predetermined liquid level from the viewpoint of reducing the probability of a competitive state with respect to the control illustrated in FIG. The second predetermined liquid level may be detected by the liquid level detector 87, and the liquid level higher than the low liquid level detected by the lower electrode 87L or the liquid level lower than the low liquid level detected by the low electrode 87L in advance. It may be the liquid level when continuously detected for a predetermined time, or may be a high liquid level detected by the high electrode 87H or a liquid level higher than the high liquid level. When the second predetermined liquid level is not detected, that is, when the liquid level is lower than the second predetermined liquid level, the control device 90 determines whether or not the blow valve 98 is in an open state ( S13). If the blow valve 98 is not in the open state, the process returns to the step (S12) of determining whether or not the liquid level detector 87 has detected the second predetermined liquid level again. On the other hand, when the blow valve 98 is in the open state, the control device 90 closes the blow valve 98 (S14), and then determines whether or not the liquid level detector 87 has detected the second predetermined liquid level. Return to step (S12). When the opening / closing of the blow valve 98 is in a competitive state with respect to the control shown in FIG. 2 (for example, the blow valve 98 is opened (S3) in the control of FIG. 2, and the blow valve 98 is closed (S14) in the control of FIG. 3). In the case of)), it is preferable to give priority to the operation of opening the blow valve 98 from the viewpoint of avoiding an insufficient amount of blow.

  In the step (S12) of determining whether or not the liquid level detector 87 has detected the second predetermined liquid level, when the second predetermined liquid level is detected, that is, the second predetermined liquid level or higher. When the liquid level is high, the control device 90 opens the blow valve 98 (S15). While the blow valve 98 is open, the heated medium liquid Wq in the gas-liquid separator 80 is discharged out of the absorption heat pump 1 through the blow valve 98. Here, as in the case of the flow shown in FIG. 2, when the blow valve 98 is opened, the control device 90 preferably closes the blow valve 98 for a predetermined time at predetermined intervals. When the blow valve 98 is opened, the control device 90 determines whether or not the liquid level detector 87 has detected the third predetermined liquid level (S16). The third predetermined liquid level is a liquid level lower than the second predetermined liquid level. For example, when the second predetermined liquid level is higher than the high liquid level, the third predetermined liquid level is When the second predetermined liquid level is a liquid level exceeding the low liquid level, the third predetermined liquid level can be the low liquid level. The third predetermined liquid level may be set to the same liquid level as the first predetermined liquid level. In the step (S16) of determining whether or not the liquid level detector 87 has detected the third predetermined liquid level, if the third predetermined liquid level is not detected, that is, the third predetermined liquid level. When the liquid level is higher, the process returns to the step of opening the blow valve 98 (S15), and the blow valve 98 is kept open. On the other hand, when the third predetermined liquid level is detected, that is, when the liquid level is lower than the third predetermined liquid level, the control device 90 closes the blow valve 98 (S17).

  Next, the control device 90 determines whether or not the accumulated time during which the blow valve 98 is opened has reached a third predetermined time after the number of times of operation of the makeup water pump 86 has reached the second predetermined number of times. Judgment is made (S18). The third predetermined time is when the heated medium liquid Wq is replenished in the gas-liquid separator 80 after the blow valve 98 is opened and the heated medium liquid Wq in the gas-liquid separator 80 is blown. This is the time required to discharge the heated medium liquid Wq to such an extent that the impurity concentration in the heated medium liquid Wq in the gas-liquid separator 80 can be diluted to the reference concentration range. The blow valve 98 is opened until the third predetermined liquid level is detected after the second predetermined liquid level is detected, and the accumulated time during which the blow valve 98 is open reaches the third predetermined time. This is equivalent to a predetermined condition. Depending on the operating conditions, if the blow valve 98 is opened until the liquid level detected by the liquid level detector 87 drops from the second predetermined liquid level to the third predetermined liquid level, the blow valve 98 is opened. The accumulated time in the state may reach a third predetermined time. If the integrated time during which the blow valve 98 is in the open state has not reached the third predetermined time, the step of determining whether or not the liquid level detector 87 has detected the second predetermined liquid level (S12). On the other hand, it is determined whether or not the cumulative time during which the blow valve 98 is opened has reached a third predetermined time after the number of times of operation of the makeup water pump 86 has reached the second predetermined number of times. When the third predetermined time is reached in the step (S18), the control device 90 resets the operation count for the second predetermined number of times (S19). As a result, the count of the number of operations of the makeup water pump 86 that triggers opening of the blow valve 98 when the liquid level detector 87 detects the second predetermined liquid level is started from zero. . When the count of the number of operations for the second predetermined number of times is reset (S19), the process returns to the step (S11) for determining whether or not the number of times of operation of the makeup water pump 86 has reached the second predetermined number of times. The above flow is repeated.

  As described above, the control shown in FIG. 3 is performed when the number of operations of the makeup water pump 86 reaches the second predetermined number, and the accumulated amount of the makeup water Ws corresponding to the number of operations of the makeup water pump 86 reached. That is, an object of the present invention is to discharge a sufficient blow amount necessary to maintain the impurity concentration in the heated medium liquid Wq within a predetermined reference concentration range with respect to the corresponding integrated amount of the heated medium vapor Wv. . The integration that keeps the blow valve 98 open until the liquid level detector 87 detects a liquid level higher than the second predetermined liquid level until the third predetermined liquid level is detected. By setting the time until the third predetermined time is reached, a part of the concentrated heated medium liquid Wq is discharged to increase the impurity concentration in the heated medium liquid Wq in the gas-liquid separator 80. And the impurity concentration can be maintained within a predetermined reference concentration range. Here, since the opening operation of the blow valve 98 for avoiding the concentration of the heated medium liquid Wq is started based on the number of operations of the makeup water pump 86, the heated medium when the blow valve 98 is opened. There is a possibility that the impurity concentration in the liquid Wq is not always the same. In this regard, in the second type absorption heat pump, the amount of liquid retained relative to the evaporation amount of the heated medium is several times larger than that of a normal steam boiler, so the concentration rate of the heated medium liquid is several times slower than that of the steam boiler. The water quality changes slowly. Therefore, the opening operation of the blow valve 98 may be started based on the number of operations of the makeup water pump 86, and the control can be simplified by doing in this way.

  In the flow shown in FIG. 3, the second predetermined number of times and / or the third predetermined time and / or the third predetermined liquid level is such that the number of operations of the makeup water pump 86 is equal to or more than the first predetermined number of times. You may change with a case and a case where it is less than the 1st predetermined number of times. That is, the second predetermined number of times and / or the third predetermined time and / or the third predetermined liquid level may be changed between the startup stage of the absorption heat pump 1 and the steady operation. As described above, at the start-up stage of the absorption heat pump 1, since the amount of the heated medium vapor Wv is not generated or small, the impurity concentration in the heated medium liquid Wq is often low, and the state of the heated medium liquid Wq Therefore, the liquid level of the heated medium liquid Wq in the gas-liquid separator 80 tends to become unstable. If the liquid level is unstable, the high liquid level and the low liquid level may be detected suddenly, the operation interval of the makeup water pump 86 may be shortened, and the number of operations may be increased from that during steady operation. . Accordingly, in the start-up stage, the second predetermined number of times is set to be large so that the frequency of opening the blow valve 98 is reduced, and / or the third predetermined time is shortened and / or the third predetermined liquid is set. The flow rate of the heated medium liquid Wq discharged from the blow pipe 95 may be reduced by setting the position higher. The third predetermined time may be set to 0 seconds, and the third predetermined liquid level may be set to the same height as the second predetermined liquid level. In these cases, the blow valve 98 will not substantially open. Also, during steady operation, the amount of generated heated medium vapor Wv is large, and the impurity concentration in the heated medium liquid Wq is increased. Therefore, the second predetermined number of times is reduced, and the third predetermined time is increased. Alternatively, the third predetermined liquid level may be set low, and the flow rate of the heated medium liquid Wq discharged from the blow valve 98 may be relatively increased. Also in the flow shown in FIG. 3, when the generated pressure of the heated medium vapor Wv is reduced by a predetermined pressure from the pressure during steady operation, it is determined that the absorption heat pump 1 has entered a stop operation, and the makeup water pump 86. It is preferable to reset the count of the number of times of operation when determining whether or not the number of times of operation has reached the first predetermined number, because this count starts from zero in the next operation of the absorption heat pump 1.

  Further, in the flow shown in FIG. 3, the step (S12), the step (S13), and the step (S14) are omitted, and it is determined whether or not the operation frequency of the makeup water pump 86 has reached the second predetermined number. In step (S11), when the second predetermined number of times is reached, the process may proceed to step (S16) immediately after proceeding to step (S15) for opening blow valve 98 immediately. And when the integration time which has opened the blow valve 98 has not reached the third predetermined time (NO in step S18), the process returns to the step of opening the blow valve 98 again (S15). In this case, since the blow valve 98 is already open, it is confirmed that the blow valve 98 is open, and the process proceeds to the next step (S16). On the other hand, when the accumulated time during which the blow valve 98 is in the open state has reached the third predetermined time (YES in step S18), the operation count for the second predetermined number is reset (S19). . The subsequent steps are the same as the flow shown in FIG. The second predetermined number of times is reduced, the third predetermined time for opening the blow valve 98 is shortened, the blow valve 98 is frequently opened, and the impurity concentration in the heated medium liquid Wq is reduced. This may be done when the fluctuation is reduced and the impurity concentration is maintained within the reference concentration range.

  Further, during the control of the flow shown in FIG. 3, the control device 90 determines whether or not the number of operations of the makeup water pump 86 has reached the third predetermined number of times, separately from the second predetermined number of times. When the third predetermined number of times is reached, the gas-liquid separator 80, the heat transfer pipe 12 of the absorber 10, the separation liquid pipe 81, the heated medium liquid pipe 82, and the heated heated medium pipe 84 are heated. You may make it notify all the blow recommendation which recommends replacing | exchanging all the to-be-heated medium liquids Wq in each inside. The third predetermined number of times is greater than the second predetermined number of times, and the total of the generated heated medium vapor Wv is such that it is preferable to replace all of the heated medium liquid Wq held by the absorption heat pump 1. The accumulated amount of makeup water Ws corresponding to the amount is the number of times of operation of the makeup water pump 86 supplied to the absorption heat pump 1. The third predetermined number of counts is typically reset when a full blow is performed.

  As described above, according to the absorption heat pump 1 according to the present embodiment, when the time when the liquid level detector 87 detects the high liquid level continues for the first predetermined time, the blow valve 98 is opened, Carryover can be avoided by closing the blow valve 98 when the liquid level of the heated medium liquid Wq in the gas-liquid separator 80 drops below the first predetermined liquid level. In this situation, when the blow valve 98 is opened, the blow valve 98 is closed at a predetermined interval for a second predetermined time, so that the foreign matter is removed when the blow valve 98 gets stuck. can do. Further, when the number of times of operation of the makeup water pump 86 reaches the second predetermined number of times, the blow valve 98 is operated after the liquid level detector 87 detects the liquid level equal to or higher than the second predetermined level. 3 until the predetermined liquid level of 3 is detected and the accumulated time in the open state reaches the third predetermined time, so that the impurity concentration in the heated medium liquid Wq in the gas-liquid separator 80 Can be suppressed.

  In the above description, the blow pipe 95 is connected to the lower part of the gas-liquid separator 80 and the heated medium liquid Wq in the gas-liquid separator 80 is directly discharged to the outside of the absorption heat pump 1. 95 is at least one of the separation liquid pipe 81, the heated medium liquid pipe 82, the heat transfer pipe 12 of the absorber 10, or the heated medium liquid including the heated medium pipe 84 and the liquid level control cylinder 87c after heating. It is good also as discharging | emitting the to-be-heated medium liquid Wq in the gas-liquid separator 80 indirectly out of the absorption heat pump 1 connected to at least one of the parts where Wq exists. When the blow tube 95 is connected to the heat transfer tube 12, an effect of discharging the evaporation residue generated in the heat transfer tube 12 can be expected. However, it is preferable that the blow pipe 95 is connected to the gas-liquid separator 80 or the separation liquid pipe 81 because the heated medium liquid Wq having a high concentration before mixing with the makeup water Ws can be discharged.

  In the above description, the blow valve 98 is disposed in the blow pipe 95, but the blow valve 98 may be directly connected to the gas-liquid separator 80 without using the blow pipe 95. Alternatively, in addition to the gas-liquid separator 80, the heated medium liquid Wq including the separated liquid pipe 81, the heated medium liquid pipe 82, and the like may be directly connected to at least one portion.

  In the above description, the makeup water pipe 85 is connected to the connecting portion between the separation liquid pipe 81 and the heated medium liquid pipe 82, and the makeup water Ws is supplied to the heated medium liquid introduction flow path so that the makeup water Ws is indirectly supplied. However, the replenishment water pipe 85 may be connected to the gas-liquid separator 80 and the replenishment water Ws may be directly supplied to the gas-liquid separator 80. 85 is connected to a portion where the heated medium W exists such as the heat transfer tube 12 of the absorber 10 or the heated medium tube 84 after heating, and the makeup water Ws is indirectly supplied to the gas-liquid separator 80. Good.

  In the above description, the start-up phase of the absorption heat pump 1 and the steady operation are distinguished based on the number of operations of the makeup water pump 86, but instead, the pressure in the gas-liquid separator 80 and Temperature, temperature and concentration of the absorbing solution (dilute solution Sw) at the outlet of the absorber 10, temperature and concentration of the absorbing solution (concentrated solution Sa) at the outlet of the regenerator 30, temperature of the refrigerant V inside the evaporator 20, absorption It is good also as performing based on the value (henceforth "in-apparatus state physical-property value") of at least 1 value of this, or the value which has a correlation with this (the inside pressure of the apparatus 10). In the start-up stage, the internal state physical property value is smaller than the value in steady operation (low in the case of pressure and temperature and thin in the case of concentration), so the internal state physical property value is smaller than the value in steady operation. A distinction may be made such that a certain stage is the starting stage and the time after reaching the value in the steady operation is the steady operation. The pressure and temperature in the gas-liquid separator 80 reflect the state of the heated medium liquid Wq in the heat transfer tube 12 in the absorber 10 and the gas-liquid separator 80, and the outlet of the absorber 10 and the regenerator The temperature and concentration of the absorbing liquid at the outlet of 30, the temperature of the refrigerant V in the evaporator 20, and the pressure inside the absorber 10 are determined by the absorption liquid heating the medium to be heated Wq in the heat transfer tube 12 of the absorber 10. Since the state is reflected, it is possible to accurately distinguish between the starting stage and the steady operation. Alternatively, in combination with the number of times of operation of the makeup water pump 86, the start stage and the time of steady operation are determined at the time when the makeup water pump 86 is operated several times after the in-device state physical property value reaches the value at the time of steady operation. May be distinguished.

  In the above description, the condition for stopping after the makeup water pump 86 is activated is when the liquid level detector 87 detects a high fluid level, but a predetermined time after the makeup water pump 86 is activated. Or when the liquid level detector 87 detects a high liquid level, or when a predetermined time has elapsed since the makeup water pump 86 was started, etc. Conditions other than when the level detector 87 detects a high liquid level may be used. In the above description, the liquid level detector 87 starts the makeup water pump 86 when it detects a low liquid level, and stops the makeup water pump 86 when it detects a high liquid level. While the liquid level detector 87 detects the low liquid level, the makeup water pump 86 is continuously operated, and while the liquid level detector 87 detects the liquid level between the low liquid level and the high liquid level, the makeup water pump 86. The operation of the predetermined time and the stop of the predetermined time are repeated, and the makeup water pump 86 may be stopped while the high liquid level is detected. In this way, the time during which the liquid level in the gas-liquid separator 80 is between the low liquid level and the high liquid level can be extended. In addition, the first predetermined time, the second predetermined time, the first predetermined number of times, the second predetermined number of times, the third predetermined time, the third predetermined number of times, the first predetermined liquid , Second predetermined liquid level, and third predetermined liquid level are the impurity concentration in the makeup water Ws, the impurity reference concentration in the heated medium liquid Wq, the generation amount of the heated medium vapor Wv, and the vapor generation pressure. In consideration of the discharge performance and control method of the makeup water pump 86, the amount of water treatment chemicals injected into the makeup water Ws by the chemical solution injector (not shown), etc. The impurity concentration in the heating medium liquid Wq may be set in advance so as to be within the standard concentration range.

In the above description, the heated medium liquid supply device is the replenishing water pump 86, but it may be configured as follows.
FIG. 4 is a partial system diagram of a makeup water system according to a modification. In the modification shown in FIG. 4, the makeup water pipe 85 is connected to the lower portion of the makeup water tank 285. The makeup water tank 285 stores makeup water Ws. A makeup water control valve 186 is disposed in the makeup water pipe 85 on the downstream side of the makeup water pump 86. A minimum flow line 185 that returns the makeup water Ws to the makeup water tank 285 is connected to the makeup water pipe 85 between the makeup water pump 86 and the makeup water control valve 186. The minimum flow line 185 allows a minimum amount of makeup water Ws to flow so that the makeup water pump 86 is not closed even when the makeup water control valve 186 is fully closed while the makeup water pump 86 is operating. It is the size that can be. In the modification shown in FIG. 4, whether or not the supplementary water Ws is supplied to the absorption heat pump 1 can be controlled by opening and closing the supplementary water control valve 186 while operating the supplementary water pump 86. At this time, the replenishing water pump 86 and the replenishing water control valve 186 constitute a heated medium liquid supply device. Alternatively, in the modification shown in FIG. 4, the makeup water pump 86, the minimum flow line 185, and the makeup water tank 285 are omitted, and when the makeup water Ws is supplied from the external source pressure, the makeup water control valve 186 is set. It can be set as a to-be-heated medium liquid supply apparatus.

  In the above description, the evaporator 20 is a full liquid type, but may be a spray type. When the evaporator is a spraying type, a refrigerant liquid spraying nozzle for spraying the refrigerant liquid Vf is provided at the upper part of the evaporator can body, and in the case of the full liquid type, the refrigerant that is to be connected to the lower part of the evaporator can body 21 What is necessary is just to connect the edge part of the liquid pipe 45 to a refrigerant | coolant spray nozzle. Moreover, you may provide the piping and pump which supply the refrigerant | coolant liquid Vf of the lower part of an evaporator can body to a refrigerant | coolant spray nozzle.

In the above description, the absorption heat pump 1 is described as a single stage, but it may be multistage.
FIG. 5 illustrates the configuration of a two-stage temperature rising type absorption heat pump 1A. In the absorption heat pump 1A, the absorber 10 and the evaporator 20 in the absorption heat pump 1 shown in FIG. 1 are a high temperature side high temperature absorber 10H and a high temperature evaporator 20H, and a low temperature side low temperature absorber 10L and a low temperature evaporator. It is divided into 20L. The high temperature absorber 10H has a higher internal pressure than the low temperature absorber 10L, and the high temperature evaporator 20H has a higher internal pressure than the low temperature evaporator 20L. The high-temperature absorber 10H and the high-temperature evaporator 20H communicate with each other at the top so that the vapor of the refrigerant V of the high-temperature evaporator 20H can be moved to the high-temperature absorber 10H. The low-temperature absorber 10L and the low-temperature evaporator 20L communicate with each other at the top so that the vapor of the refrigerant V in the low-temperature evaporator 20L can be moved to the low-temperature absorber 10L. The heated medium liquid Wq is heated by the high temperature absorber 10H. The heat source hot water h is introduced into the low temperature evaporator 20L. The low-temperature absorber 10L heats the refrigerant liquid Vf in the high-temperature evaporator 20H by absorption heat when the absorbing liquid S absorbs the vapor of the refrigerant V that has moved from the low-temperature evaporator 20L, and the refrigerant V enters the high-temperature evaporator 20H. The generated vapor V of the refrigerant V in the high-temperature evaporator 20H moves to the high-temperature absorber 10H and is absorbed by the absorption liquid S in the high-temperature absorber 10H with the absorbed heat. It is comprised so that it may heat.

DESCRIPTION OF SYMBOLS 1 Absorption heat pump 10 Absorber 80 Gas-liquid separator 81 Separation liquid pipe 82 Heated medium liquid pipe 86 Supplementary water pump 87 Liquid level detector 90 Control device 98 Blow valve Sa Concentrated solution Ve Evaporator refrigerant vapor Wm Mixed heated medium Wq Heated medium liquid Wv Heated medium vapor

Claims (6)

An absorption heat pump that pumps heat from an introduced heat source by an absorption heat pump cycle of an absorption liquid and a refrigerant to generate steam of a medium to be heated;
An absorber that heats the medium to be heated with absorption heat generated when the absorption liquid absorbs the vapor of the refrigerant;
A gas-liquid separator for introducing the heated medium heated in the absorber and separating the introduced heated medium into vapor and liquid;
A heated medium liquid introduction flow path for guiding the liquid of the heated medium inside the gas-liquid separator to the absorber;
A blow valve for discharging the liquid of the heated medium inside the gas-liquid separator directly or indirectly to the outside of the absorption heat pump;
A liquid level detector for detecting a liquid level of the liquid to be heated in the gas-liquid separator;
A heated medium liquid supply device for directly or indirectly supplying the liquid of the heated medium to the gas-liquid separator;
A control device that controls starting and stopping of the heated medium liquid supply device and opening and closing of the blow valve;
When the time when the liquid level detector detects a high liquid level continues for a first predetermined time, the control device determines that the liquid level of the heated medium inside the gas-liquid separator is high. Open the blow valve until it drops to a predetermined discharge stop liquid level below the liquid level;
Absorption heat pump. The controller closes the blow valve at a predetermined interval for a second predetermined time when the blow valve is open;
The absorption heat pump according to claim 1. An evaporator for heating the liquid of the refrigerant with the heat of the heat source and generating vapor of the refrigerant to be supplied to the absorber;
In the absorber, the absorbing liquid whose concentration has been reduced by absorbing the vapor of the refrigerant is directly or indirectly introduced from the absorber, and the introduced absorbing liquid is heated by the heat of the heat source to remove the refrigerant. A regenerator
The controller is
After the activation of the absorption heat pump, the number of times of stopping after starting the heated medium liquid supply device is greater than or equal to the first predetermined number of times and less than the first predetermined number of times,
Or the pressure and temperature inside the gas-liquid separator, the temperature and concentration of the absorbing liquid at the outlet of the absorber, the temperature and concentration of the absorbing liquid at the outlet of the regenerator, and the refrigerant inside the evaporator At least one value of the temperature of the absorber, the pressure inside the absorber, or a value correlated therewith before and after reaching a predetermined value,
Changing at least one of the first predetermined time and the second predetermined time;
The absorption heat pump according to claim 2. The control device opens the blow valve while satisfying a predetermined condition when the number of times of stopping after starting the heated medium liquid supply device reaches a second predetermined number of times, Returning the count of the number of times of stopping and stopping the heated medium liquid supply device for the second predetermined number of times;
The absorption heat pump according to any one of claims 1 to 3. An absorption heat pump that pumps heat from an introduced heat source by an absorption heat pump cycle of an absorption liquid and a refrigerant to generate steam of a medium to be heated;
An absorber that heats the medium to be heated with absorption heat generated when the absorption liquid absorbs the vapor of the refrigerant;
A gas-liquid separator for introducing the heated medium heated in the absorber and separating the introduced heated medium into vapor and liquid;
A heated medium liquid introduction flow path for guiding the liquid of the heated medium inside the gas-liquid separator to the absorber;
A blow valve for discharging the liquid of the heated medium inside the gas-liquid separator directly or indirectly to the outside of the absorption heat pump;
A liquid level detector for detecting a liquid level of the liquid to be heated in the gas-liquid separator;
A heated medium liquid supply device for directly or indirectly supplying the liquid of the heated medium to the gas-liquid separator;
A control device that controls starting and stopping of the heated medium liquid supply device and opening and closing of the blow valve;
The control device opens the blow valve while satisfying a predetermined condition when the number of times of stopping after starting the heated medium liquid supply device reaches a second predetermined number of times, Returning the count of the number of times of stopping and stopping the heated medium liquid supply device for the second predetermined number of times;
Absorption heat pump. An evaporator for heating the liquid of the refrigerant with the heat of the heat source and generating vapor of the refrigerant to be supplied to the absorber;
In the absorber, the absorbing liquid whose concentration has been reduced by absorbing the vapor of the refrigerant is directly or indirectly introduced from the absorber, and the introduced absorbing liquid is heated by the heat of the heat source to remove the refrigerant. A regenerator
The controller, after the absorption heat pump is activated, when the heated medium liquid supply device is activated and then stopped is more than a first predetermined number of times and less than the first predetermined number of times. so,
Or the pressure and temperature inside the gas-liquid separator, the temperature and concentration of the absorbing liquid at the outlet of the absorber, the temperature and concentration of the absorbing liquid at the outlet of the regenerator, and the refrigerant inside the evaporator At least one value of the temperature of the absorber, the pressure inside the absorber, or a value correlated therewith before and after reaching a predetermined value,
Changing at least one of the second predetermined number of times and the predetermined condition;
The absorption heat pump according to claim 4 or 5.

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