JP4847792B2 - Heat medium supply device - Google Patents

Description

  The present invention is formed in such a manner as to pass through the heat medium heating unit and the open-air type heat medium storage tank, and to span the heat medium return unit from the heat medium supply terminal and the heat medium supply unit to the heat medium supply terminal. The apparatus-side heat medium circulation path, the heat medium circulation pump that is provided in the apparatus-side heat medium circulation path and circulates the heat medium, and the heat medium amount detection that detects the amount of the heat medium in the heat medium storage tank Based on the detection information of the means, when the amount of the heat medium in the heat medium storage tank falls below a set lower limit amount, the supply of the heat medium to the heat medium storage tank is started, and the heat in the heat medium storage tank is A heat medium provided with a heat medium replenishment means for replenishing the heat medium in a form that terminates the supply of the heat medium to the heat medium storage tank when the medium amount exceeds the set upper limit amount, and an operation control means for controlling the operation. The present invention relates to a medium supply device.

  The heat medium supply device is used in a state in which a terminal-side circulation path formed in a form via a heat medium supply terminal is connected to the heat medium return unit and the heat medium supply unit. The heat medium filled in the circuit (hereinafter referred to as a heat medium circuit) formed in the device side circuit and the terminal side circuit is reduced by evaporation to the atmosphere in the heat medium storage tank, etc. When the amount of the heat medium in the tank falls below the set lower limit amount, the heat medium replenishing means automatically replenishes the heat medium.

  In such a heat medium supply device, when there is a heat medium leak due to damage to the terminal side circulation path or a heat medium leak due to damage to the heat medium supply terminal, the use in the state where the abnormality has occurred is stopped. Therefore, as a conventional example for that purpose, the operation control means determines that the heat medium amount in the heat medium storage tank is set based on the detection information of the heat medium amount detection means. When reaching the set lower limit amount within the set time for monitoring the decrease in the amount of heat medium after reaching the upper limit amount, it is determined that the heat medium leak has occurred by determining that the condition for leak determination is satisfied. (For example, refer to Patent Document 1).

  In addition, in the heat medium supply device of Patent Document 1, based on the detection information of the heat medium amount detection means for detecting the amount of heat medium in the heat medium storage tank, evaporation to the atmosphere in the heat medium storage tank, etc. When the amount of heat medium is decreasing at a faster rate than the rate of decrease in the amount of heat medium in the heat medium storage tank during normal operation, the heat medium is leaking outside at some point in the heat medium circuit Is determined.

JP-A-2-218939

  By the way, the terminal side circulation path connected to the heat medium return part and the heat medium supply part of the heat medium supply device is often constituted by, for example, a resin pipe formed of a cross-linked polyethylene resin. Since the resin is permeable to gas, air may permeate into the pipe due to a pressure difference between the inside and the outside of the resin pipe.

  For this reason, when the operation of the heat medium supply device is not performed for a long time and the state in which the heat medium in the pipe is stopped without being circulated continues, an air pocket is formed by the air that has permeated into the resin pipe. In particular, when the total length of the terminal-side circulation path is long, a large amount of air is dispersed and enclosed in the terminal-side circulation path by forming air pools at many locations on the terminal-side circulation path. It will be in the state. In such a state, when the operation of the heat medium supply device is started and circulation of the heat medium is started by the heat medium circulation pump, as described below, a phenomenon called “heat medium dropping” May occur.

  That is, in the installation situation where the installation height of the heat medium supply terminal is higher than the installation height of the heat medium supply device, it exists inside the terminal-side heat medium circulation path while the heat medium is not being circulated. The balance of the heating medium is maintained in a state where it is supported by the atmospheric pressure applied to the surface (hereinafter referred to as the heating medium surface) where the heating medium in the open air storage tank contacts the atmosphere. The heat medium existing inside the circuit stays in this state without moving.

  When the supply of the heat medium is started by the heat medium circulation pump while the pressure balance of the heat medium is maintained, the air pools formed in various places inside the terminal-side heat medium circulation path are gathered together. While moving to a higher part of the circulation path, the balance between the atmospheric pressure and the weight of the heating medium in the heating medium circuit is lost, and among the heating mediums existing in the heating medium circuit, the heating medium storage tank and the heating medium. The heat medium in the terminal-side heat medium circulation path located between the circulation pumps flows back to the heat medium storage tank. When the amount of the heat medium flowing into the heat medium storage tank due to the reverse flow is larger than the amount of the heat medium flowing out from the heat medium storage tank by the heat medium circulation pump, the amount of the heat medium in the heat medium storage tank increases. If the amount of the heat medium in the heat medium storage tank increases due to the reverse flow to the heat medium storage tank, for example, it will be discharged from the heat medium storage tank through an overflow pipe that also serves as a ventilation pipe. , Heat transfer will occur.

  When the above-described heat medium drop occurs, a part of the heat medium held by the heat medium circuit is discharged and the amount of the heat medium is reduced. As the air pool in the side heat medium circulation path is transported to the heat medium storage tank and released to the atmosphere, the amount of heat medium in the heat medium storage tank that has increased until it overflows gradually decreases and remains in the circuit. It becomes the quantity according to the quantity of the heating medium. Therefore, when the amount of the heat medium discharged to the outside due to the overflow is large, the amount of the heat medium remaining in the circuit decreases, and as a result, the amount of the heat medium in the heat medium storage tank becomes the set lower limit amount. Reach. In this case, the heat medium is replenished by the heat medium replenishing means until the amount of the heat medium in the heat medium storage tank reaches or exceeds the set upper limit amount.

  When the amount of the heat medium is reduced due to the drop of the heat medium immediately after the start of circulation supply of the heat medium described above, the conventional heat medium supply device has a problem of erroneously determining that a heat medium leak has occurred.

  In other words, the amount of the heat medium in the heat medium storage tank reaches the set upper limit amount before the overflow occurs due to the back flow of the heat medium. The decrease in the amount of heat medium in the heat medium storage tank due to the release of the heat medium occurs in a short time, so the amount of heat medium in the heat medium storage tank is used for monitoring the decrease in the amount of heat medium after reaching the set upper limit amount. The set lower limit will be reached within the set time. For this reason, it is determined that the condition for leakage determination is satisfied, and it is erroneously determined that the heat medium leakage has occurred.

  In addition, when there is no back flow of the heat medium to the heat medium storage tank immediately after the start of circulation supply, or when the back flow rate is small, overflow does not occur and the heat medium does not fall off. By circulating supply, the air pool moves to the heat medium storage tank and is released to the atmosphere one after another, so that the amount of heat medium in the heat medium storage tank that has reached the set upper limit amount before the start of circulation supply is less than the set lower limit amount In such a case, it is erroneously determined that a heat medium leak has occurred as in the case where the heat medium has dropped.

  In addition, as an example in which the amount of the heat medium in the heat medium storage tank that has reached the set upper limit amount before the start of circulation supply decreases below the set lower limit amount, a parallel state is established between the heat medium supply unit and the heat medium return unit. In addition, the heat in the heat medium storage tank generated when the heat medium circulation supply is started with a time difference with respect to a plurality of heat medium supply terminals connected in a state where the circulation supply of the heat medium is interrupted separately. A decrease in the amount of medium can be mentioned.

  When the explanation is added, when circulation supply of the heat medium to one terminal among the plurality of heat medium supply terminals is started, the movement of the air pool in the terminal-side heat medium circulation path corresponding to this one terminal When the amount of the heat medium in the heat medium storage tank is reduced to the set lower limit amount or less, the heat medium is replenished until the amount of the heat medium in the heat medium storage tank becomes equal to or greater than the set upper limit amount by the heat medium supply means. Thereafter, circulation of the heat medium to the other heat medium supply terminals among the plurality of heat medium supply terminals is started after a time difference, and the air pool in the terminal side heat medium circulation path corresponding to the other terminals When the amount of the heat medium in the heat medium storage tank decreases below the set lower limit amount due to the movement of the heat medium, the amount of the heat medium in the heat medium storage tank that has reached the set upper limit amount before the start of circulation supply to the other heat medium supply device Will decrease below the set lower limit. Therefore, depending on the time difference, the amount of heat medium in the heat medium storage tank decreases from the set upper limit amount to the set lower limit amount within the set time for monitoring the heat medium amount decrease, and it is determined that the condition for leak determination is satisfied. By doing so, it is determined that a heat medium leak has occurred.

  As described above, in the conventional heat medium supply device, there is a case where it is erroneously determined that the heat medium leak has occurred when the circulation of the heat medium is started even though the heat medium leak does not occur. There was room for improvement in the accuracy of discrimination regarding the occurrence of heat medium leakage.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat medium supply device that can accurately determine the occurrence of a heat medium leak.

The heat medium supply device according to the present invention is in the form of passing through the heat medium heating unit and the open air type heat medium storage tank, the heat medium return unit from the heat medium supply terminal, and the heat medium supply unit to the heat medium supply terminal. An apparatus-side heat medium circuit formed so as to extend over
A heat medium circulation pump that is equipped in the apparatus side heat medium circulation path and circulates the heat medium;
Based on the detection information of the heat medium amount detecting means for detecting the amount of heat medium in the heat medium storage tank, the heat to the heat medium storage tank is reduced when the amount of heat medium in the heat medium storage tank falls below a set lower limit amount. A heating medium that starts supplying the heating medium and replenishes the heating medium in such a form that the supply of the heating medium to the heating medium storage tank is terminated when the amount of the heating medium in the heating medium storage tank exceeds a set upper limit amount. Replenishment means;
A heating medium supply device provided with an operation control means for controlling operation,
The first characteristic configuration is that when the amount of the heat medium in the heat medium storage tank reaches the set lower limit amount, the operation control unit is configured to store the heat medium based on the detection information of the heat medium amount detection unit. It is configured to determine that a heat medium leak has occurred by determining that the decrease in the amount of the heat medium in the tank satisfies the leak determination condition, and circulating supply of the heat medium to the heat medium supply terminal is performed. When the heat medium supply stop time from the end to the restart is equal to or longer than the long-term supply stop determination set time, the initial supply period set time from the start of circulating supply of the heat medium to the heat medium supply terminal Within the period until it elapses, even if the decrease in the amount of the heat medium in the heat medium storage tank that occurs when the circulation of the heat medium to the heat medium supply terminal is started satisfies the leakage determination condition. , So as to determine that the leakage determination condition is not satisfied There is the point that has been made.

According to the first feature of the present invention, when the circulating supply of the heating medium to the heating medium supply terminal is started (the set time for the initial supply period has elapsed since the circulating supply of the heating medium to the heating medium supply terminal is started) The operation control means determines that the leakage determination condition is not satisfied even if a decrease in the amount of the heating medium in the heating medium storage tank that satisfies the leakage determination condition occurs within the period until the The operation control means does not satisfy the leakage determination condition even if the leakage determination condition may be satisfied due to a decrease in the amount of the heating medium in the heating medium storage tank when the circulation of the heating medium to the supply terminal is started. Is determined.

  Therefore, even when the circulating supply of the heat medium is started, the operation control means does not satisfy the leakage determination condition even if the amount of the heat medium in the heat medium storage tank temporarily decreases and the leakage determination condition may be satisfied. In order to determine that it is not satisfied, air traps scattered in the heat medium circuit are released to the atmosphere when circulation supply of the heat medium is started. Even if the condition may be met, it can be suppressed that the heat medium leak has occurred, and when the heat medium circulation supply is started even though the heat medium leak does not actually occur It is possible to prevent erroneous determination that a heat medium leak has occurred.

  If a heat medium leak actually occurs, the amount of the heat medium in the heat medium storage tank is continuously reduced except during the time when the heat medium is replenished by the heat medium replenishing means. The heat medium leak occurred by determining that the decrease in the amount of the heat medium in the heat medium storage tank that occurs except when the circulation of the heat medium to the heat medium supply terminal is started satisfies the condition for judging the leak. Can be determined.

  Furthermore, according to this characteristic configuration, when the circulating supply of the heat medium is resumed after the set supply time for determining the long-term supply stop has elapsed since the circulation of the heating medium to the heating medium supply terminal has been completed, Even if the amount of heat medium in the tank decreases and this may satisfy the conditions for leakage determination, the operation control means determines that the conditions for leakage determination are not satisfied. When the supply of the heat medium to the heat medium supply terminal is started by staying without being circulated for more than an hour, the amount of the heat medium in the heat medium storage tank temporarily decreases due to the heat medium dropping, etc. When the circulating supply of the heat medium to the heat medium supply terminal is started in a state where there is a high possibility that the operation control means will not leak even if the decrease in the amount of the heat medium in the heat medium storage tank satisfies the leak determination condition. It can be determined that the conditions for determination are not met. That.
  Therefore, the decrease in the amount of the heat medium at the time of restarting the operation after the heat medium supply stop time exceeds the long-time supply stop determination set time can be reliably excluded from the factors for determining the heat medium leakage. When the supply of the heat medium to the heat medium supply terminal is resumed after the medium supply stop time has exceeded the set time for long-term supply stop determination, it is erroneously determined that a heat medium leak that has not actually occurred has occurred. This can be surely prevented.
  In addition, the amount of heat medium in the heat medium storage tank when the circulation of the heat medium is resumed before the set time for long-term supply stoppage determination has elapsed since the end of the circulation of the heat medium to the heat medium supply terminal. If the condition for leakage determination is satisfied due to the decrease, the operation control means determines that the condition for leakage determination is satisfied. If the circulation of the heating medium is started in a state where only a small amount of air pool is present in the heating medium circuit because it is a short time that is less than 2, the amount of the heating medium in the heating medium storage tank due to the movement of the air pool is reduced. Since it is unlikely to decrease, it is determined that the leakage determination condition is not satisfied just because the circulation supply of the heat medium is started, and it is determined that the leakage determination condition is satisfied. As a result, it is possible to prevent as much as possible that the leakage of the heat medium actually occurring is missed when the circulating supply of the heat medium is started.
  Therefore, if the circulating supply of the heat medium to the heat medium supply terminal is resumed before the heat medium supply stop time is less than the long-term supply stop determination set time, the amount of the heat medium decreases and the leakage determination condition In order to discriminate that the decrease in the amount of the heat medium has occurred, even if the decrease in the amount of the heat medium occurs when the circulation of the heat medium is started. Element.
  In other words, when the circulating supply of the heat medium to the heat medium supply terminal is resumed after the heat medium supply stop time has exceeded the long-term supply stop determination set time, the heat medium leak is not actually generated but the heat medium leaks. If the amount of heat medium in the medium storage tank decreases and the conditions for leakage determination may be satisfied, it is possible to prevent erroneous determination of the occurrence of heat medium leakage by determining that the conditions for leakage determination are not satisfied, If the circulating supply of the heating medium to the heating medium supply terminal is restarted before the heating medium supply stopping time is less than the set time for determining the long-term supply stoppage, it will actually occur from the restart of the circulating supply of the heating medium. If the amount of the heat medium in the heat medium storage tank decreases due to the leakage of the heat medium, and the condition for leakage determination is satisfied, it is determined that the condition for leakage determination is satisfied. The occurrence of heat medium leakage as early as possible Rukoto can.
In addition, according to this characteristic configuration, a decrease in the amount of the heat medium in the heat medium storage tank is determined as a leak from the start of circulating supply of the heat medium to the heat medium supply terminal until the initial supply period set time elapses. Even if the operating condition is satisfied, the operation control means determines that the leakage determination condition is not satisfied, or even if the decrease in the amount of the heat medium in the heat medium storage tank satisfies the leakage determination condition, the operation control means Since the predetermined count value is not added, a decrease in the amount of the heat medium that satisfies the leakage determination condition occurs after the start of the circulating supply of the heat medium to the heat medium supply terminal until the set time for the initial supply period elapses. However, it is possible to avoid erroneous determination that the heat medium leak has occurred.
  Therefore, for example, the air reservoir dispersed in the heating medium moves to the heating medium storage pump by the circulation supply after the circulation supply of the heating medium starts, and is gradually released into the atmosphere, so that the heating medium of the heating medium storage tank The amount of heat medium decreases due to a phenomenon that occurs over a certain period of time from the start of circulation supply of the heat medium, affected by the start of circulation supply of the heat medium to the heat medium supply terminal, such as when the amount decreases. Even if the conditions for leakage determination are satisfied, it is possible to avoid erroneous determination that the heat medium leakage has occurred due to the decrease in the amount of the heat medium. That is, it is possible to avoid erroneously determining that a heat medium leak has occurred due to a phenomenon that occurs from the start of circulating supply of the heat medium until the initial supply period setting time elapses.
As described above, according to this feature configuration, the occurrence of the heat medium leakage can be accurately determined, and the determination result of the success or failure of the condition for determining the leak is determined according to the heat medium supply stop time when the circulation of the heat medium is resumed. This makes it possible to obtain a heat medium supply device that can determine the occurrence of a heat medium leak as soon as possible after restarting the circulation of the heat medium while preventing erroneous determination of the occurrence of the heat medium leak. It was.

The heat medium supply device according to the present invention is in the form of passing through the heat medium heating unit and the open air type heat medium storage tank, the heat medium return unit from the heat medium supply terminal, and the heat medium supply unit to the heat medium supply terminal. An apparatus-side heat medium circuit formed so as to extend over
A heat medium circulation pump that is equipped in the apparatus side heat medium circulation path and circulates the heat medium;
Based on the detection information of the heat medium amount detecting means for detecting the amount of heat medium in the heat medium storage tank, the heat to the heat medium storage tank is reduced when the amount of heat medium in the heat medium storage tank falls below a set lower limit amount. A heating medium that starts supplying the heating medium and replenishes the heating medium in such a form that the supply of the heating medium to the heating medium storage tank is terminated when the amount of the heating medium in the heating medium storage tank exceeds a set upper limit amount. Replenishment means;
A heating medium supply device provided with an operation control means for controlling operation,
The second characteristic configuration is that when the amount of the heat medium in the heat medium storage tank reaches the set lower limit amount, the operation control unit is configured to store the heat medium storage based on detection information of the heat medium amount detection unit. It is configured to determine that the heat medium leakage has occurred when the number of times that the decrease in the amount of the heat medium in the tank satisfies the leakage determination condition reaches the determination number of times within the determination setting time, and , When the heat medium supply stop time from the end of the circulating supply of the heat medium to the heat medium supply terminal to the restart is equal to or longer than the set time for long-term supply stop determination, the heat medium supply to the heat medium supply terminal The heating medium in the heating medium storage tank that is generated when the circulating supply of the heating medium to the heating medium supply terminal is started within the period from the start of the circulating supply until the set time for the initial supply period elapses Even if the decrease in the volume satisfies the conditions for leak detection, Was determined not to satisfy the leakage determination condition is that a reduction of the heating medium of the heat medium storage tank is configured not added to the number of times determined as the leakage determination condition is satisfied.

  According to the second characteristic configuration of the present invention, the number of times that it is determined that the decrease in the amount of the heat medium in the heat medium storage tank satisfies the condition for determining the leak reaches the set number for determination within the set time for determination. Since it is determined that a leak has occurred, it is not determined that a heat medium leak has occurred unless the decrease in the amount of the heat medium in the heat medium storage tank repeatedly satisfies the leak determination condition. In other words, the amount of heat medium continuously decreases due to actual heat medium leakage, etc., so that the amount of heat medium in the heat medium storage tank repeatedly decreases due to heat medium leakage and increases due to the heat medium supply means. Unless the phenomenon that the decrease in the amount of the heat medium in the heat medium storage tank satisfies the condition for determining the leak does not occur repeatedly, it is not determined that the heat medium leak has occurred.

  Therefore, even if the amount of the heat medium in the heat medium storage tank temporarily decreases and the decrease in the amount of the heat medium in the heat medium storage tank may satisfy the conditions for determining the leakage, the heat medium leaks by that time. As long as it has already occurred and has not reached the set number of times for determination, a heat medium leak has occurred by determining that the leak determination condition is satisfied due to the temporary decrease in the amount of heat medium. Is not determined.

  When a heat medium leak actually occurs, the amount of heat medium in the heat medium storage tank repeats a decrease due to the heat medium leak and an increase due to the heat medium replenishment means. Since the phenomenon that the decrease in the amount of medium satisfies the conditions for leakage determination repeatedly occurs, the amount of heat medium in the heat medium storage tank is set by setting the determination setting time and the number of determination settings to appropriate values. The number of times it is determined that the decrease satisfies the conditions for determining the leak reaches the set number for determination within the set time for determination, and it is determined that the heat medium leak has occurred by determining that the heat medium leak has occurred. can do.

  Thus, when it is confirmed that the phenomenon that the decrease in the amount of the heat medium in the heat medium storage tank satisfies the condition for determining the leak repeatedly occurs, it is determined that the heat medium leak has occurred. It is possible to accurately determine the occurrence of leakage.

Furthermore, it occurs when the circulating supply of the heat medium to the heating medium supply terminal is started ( within the period from the start of circulating supply of the heating medium to the heating medium supply terminal until the set time for the initial supply period elapses) Even if the decrease in the amount of the heat medium in the heat medium storage tank that satisfies the condition for determining the leak is determined not to satisfy the condition for determining the leak, the air reservoirs scattered in the heat medium circuit Even if the amount of heat medium in the heat medium storage tank decreases due to release to the atmosphere after the start and the condition for leakage determination may be satisfied, the decrease in the amount of heat medium in the heat medium storage tank may be the condition for leakage determination The number of determinations that satisfy the condition does not change, and the number of determinations does not approach the set number for determination. Therefore, it is determined that a heat medium leak has occurred even if a decrease in the amount of the heat medium in the heat medium storage tank occurs due to a drop in the heat medium when the heat medium circulation supply to the heat medium supply terminal is started. Since this is not affected, it is possible to accurately determine the occurrence of a heat medium leak.
On the other hand, the number of times described so far is not increased even when the set time is longer than the long-term supply stop determination time.

  Thus, according to the 2nd characteristic structure of this invention, it came to obtain the heat-medium supply apparatus which can discriminate | determine generation | occurrence | production of a heat-medium leak with sufficient precision.

According to a third characteristic configuration of the present invention, in the first and second characteristic configurations of the present invention, the operation control means is in a parallel state between the heating medium supply unit and the heating medium return unit, and the heating medium is separately provided. Managing the circulation supply state of the heating medium for each of the plurality of heating medium supply terminals connected in a state where the circulation supply of the heating medium is intermittent, and circulating the heating medium to any of the plurality of heating medium supply terminals Even if the decrease in the amount of the heat medium in the heat medium storage tank that occurs when the supply is started satisfies the leakage determination condition, it is determined that the leakage determination condition is not satisfied. is there.

According to the third characteristic configuration of the present invention, when the circulation of the heat medium is started to any one of the plurality of heat medium supply terminals, the heat medium storage tank is supplied with the heat medium supplied to the heat medium supply terminal. Even if the amount of the heat medium decreases and the condition for leakage determination is satisfied, the operation control means determines that the condition for leakage determination is not satisfied, so the circulation of the heat medium to any of the plurality of heat medium supply terminals When starting the supply, in any case, it is possible to prevent erroneous determination that a heat medium leak that has not actually occurred has occurred.

As described above, according to the third characteristic configuration of the present invention, it is possible to accurately determine the occurrence of the heat medium leakage, and the plurality of heat medium supply terminals are arranged in parallel between the heat medium supply unit and the heat medium return unit. In addition, even in a configuration in which the circulation of the heat medium is connected in an intermittent state, it is possible to prevent misidentification of the occurrence of a heat medium leak when the circulation of the heat medium to the heat medium supply terminal is started. The heat medium supply device which can be obtained was obtained.

According to a fourth feature configuration of the present invention, in the first to third feature configurations of the present invention, the leakage determination condition is a condition in which a heat medium amount in the heat medium storage tank reaches the set lower limit amount. is there.

According to the fourth characteristic configuration of the present invention, the leakage determination condition is the same as the start condition for the replenishment operation of the heat medium replenishment means. Since the information can be used to determine whether or not the leakage determination condition is satisfied, it is not necessary to provide new means for detecting information for determining whether or not the leakage determination condition is satisfied, and the device configuration is simplified. In addition, cost reduction can be achieved.

According to a fifth feature configuration of the present invention, in the first to third feature configurations of the present invention, the amount of heat medium after the leakage determination condition has reached the set upper limit amount of the heat medium amount in the heat medium storage tank. This is a condition for reaching the set lower limit amount within the set time for decrease monitoring.

According to the fifth characteristic configuration of the present invention, “the amount of the heat medium in the heat medium storage tank reaches the set upper limit amount” which is information necessary for controlling the start and end of the heat medium replenishment operation by the heat medium replenishment means. ”And“ The amount of the heat medium in the heat medium storage tank reaches the set lower limit amount ”are used as information for determining whether or not the leakage determination condition is satisfied. Therefore, it is not necessary to provide new means for detecting this information, and the apparatus configuration can be simplified and the cost can be reduced.

  An embodiment of a heat medium supply device of the present invention will be described based on the drawings.

[First Embodiment] As shown in FIGS. 1 and 2, the heat source device 3 as a heat medium supply device is connected to a heating terminal 1 as a heat medium supply terminal such as a floor heating device and a bathroom heating and drying device. A terminal-side circulation path 2 for supplying hot water as a heat medium is connected. The heat source unit 3 includes a control unit 4 as an operation control unit that controls the operation of the heat source unit 3, and is configured to be communicable with a remote controller 5 provided corresponding to the terminal 1. In this embodiment, the terminal 1 is installed on the second floor, the heat source unit 3 is installed on the first floor, and the installation position of the heat source unit 3 and the terminal 1 is higher in the terminal 1 than in the heat source unit 3. Yes.

  The control unit 4 and the remote controller 5 are configured to be able to communicate control information such as operation start and operation stop of the terminal 1 and operation status information of the heat source unit 3. And the control part 4 is comprised so that the heat-medium supply operation | movement with respect to the terminal 1 may be controlled based on the command from the remote control 5.

  The heat source unit 3 circulates and supplies the heat medium to the expansion tank 7 and the terminal 1 as an air release type heat medium storage tank that stores the heat medium in the middle of the heat source unit flow path 6 as the apparatus side heat medium circulation path. A heat pump 10 as a heat medium heating unit for heating the heat medium flowing through the heat source machine flow path 6 by combustion of the burner 9 and the like. And a fan 11 for supplying combustion air.

  The fuel supply passage 12 for supplying the fuel gas to the burner 9 is provided with a fuel gas on-off valve 13 for intermittently supplying the fuel gas and a fuel gas adjusting valve 14 for adjusting the fuel gas supply amount. An igniter 15 to be used and a frame rod 16 for confirming the ignition of the burner 9 are also provided.

  The expansion tank 7 is provided with an upper limit sensor 23 that detects the H level set as the upper limit of the liquid level of the stored heat medium and a lower limit sensor 24 that detects the L level set as the lower limit. The upper limit sensor 23 and the lower limit sensor 24 detect that the liquid level of the heat medium in the expansion tank 7 is at the H level and the L level, so that the amount of the heat medium in the expansion tank 7 becomes the level of these liquid levels. It is detected that the set upper limit amount VH and the set lower limit amount VL correspond to. That is, the upper limit sensor 23 and the lower limit sensor 24 function as heat medium amount detection means.

  The expansion tank 7 is connected to a tank water supply path 25 for supplying water as a heat medium, and the tank water supply path 25 is provided with a makeup water electromagnetic valve 26. The make-up water solenoid valve 26 is controlled by a control program for heat medium supply processing executed by the control unit 4. Specifically, as shown in the flowchart of FIG. 3, the control unit 4 expands when the amount of the heat medium in the expansion tank 7 becomes equal to or less than the set lower limit amount VL based on the detection information of the upper limit sensor 23 and the lower limit sensor 24. Supply of the heat medium to the tank 7 is started (Step # A1 to Step # A2), and when the amount of the heat medium in the expansion tank 7 becomes equal to or larger than the set upper limit amount VH, the supply of the heat medium to the expansion tank 7 is ended ( The heat medium is replenished in the form of step # A3 to step # A4). That is, the tank water supply path 25, the makeup water electromagnetic valve 26, and the control unit 4 constitute a heat medium supplementing means.

  Since the amount of heat medium in the expansion tank 7 decreases due to evaporation to the atmosphere, the time change of the amount of heat medium in the expansion tank 7 is as shown in FIG. As can be seen from FIG. 4, the amount of the heat medium slowly decreases due to evaporation to the atmosphere, and when the set lower limit VL is reached at time tL, this is detected by the lower limit sensor 24, thereby opening the makeup water electromagnetic valve 26. Since the valve is operated and replenishment is performed at a substantially constant pace, the amount of heat medium in the expansion tank 7 increases with time, and when the set upper limit amount VH is reached at time tH, this is detected by the upper limit sensor 23. As a result, the replenishment water solenoid valve 26 is closed, and thereafter, the amount of the heat medium in the expansion tank 7 slowly decreases again due to the evaporation of the heat medium to the atmosphere. Note that the difference between the decrease rate and increase rate of the amount of heat medium in the expansion tank 7 due to evaporation and replenishment appears in the slope of the slope in FIG. 4, but in FIG. It is different.

  The expansion tank 7 is provided with an overflow pipe 22 that also serves as a ventilation pipe at an overflow level (hereinafter referred to as the OF level) set at a position higher than the H level. When the amount of heat reaches the amount of heat medium corresponding to the OF level (hereinafter referred to as the overflow amount VOF), the heat medium is discharged from the overflow pipe 22 to the outside.

  A return thermistor 17 for detecting the temperature of the heat medium is provided upstream of the expansion tank 7 in the heat source machine flow path 6 in the heat medium circulation direction, and heat is higher than that of the heat exchanger 10 in the heat source machine flow path 6. A forward thermistor 18 for detecting the temperature of the heat medium is provided downstream of the medium circulation direction, and the upstream thermistor in the heat medium circulation direction and the forward thermistor in the heat source internal flow path 6 with respect to the location of the return thermistor 17. The downstream side in the heat medium circulation direction is connected to the downstream side in the heat medium circulation direction with respect to the arrangement place of 18 by the bypass passage 19.

  The terminal-side circulation path 2 is composed of a forward-side flow path 2 f and a return-side flow path 2 r, and the forward-side flow path 2 f and the return-side flow path 2 r are connected to the terminal 1. The heat source internal flow path 6 of the heat source apparatus 3 is connected to the forward flow path 2f by a forward header 20f as a heat medium supply section on the heat medium forward side, and the heat medium return side as a heat medium return section. The return side header 20r is connected to the return side flow path 2r, and a thermal valve 21 is provided in the forward side flow path 2f. The heat source device 3 is configured to supply a heat medium to the terminal 1 by opening and closing the thermal valve 21. The terminal-side circulation path 2, the heat source machine internal flow path 6, the expansion tank 7, and the like constitute a heat medium circuit C as a heat medium circulation supply path.

  Based on the detection information of the upper limit sensor 23 and the lower limit sensor 24, the control unit 4 determines that the heat medium leak has occurred by determining that the decrease in the amount of the heat medium in the expansion tank 7 satisfies the leak determination condition. It is configured to execute the heat medium leakage determination process, and when the heat medium held in the heat medium circuit C leaks outside the circuit, the heat medium leak can be detected. If it is determined that the heat medium leak has occurred in the heat medium leak determination process, the heat medium leak occurrence process is executed, and an alarm lamp (not shown) provided in the remote controller 5 is turned on. Yes. Accordingly, the user can recognize the occurrence of the heat medium leak, and when the heat medium leak occurs, it is possible to take some measures such as maintenance.

  In addition, in order to minimize the possibility that the heat medium leak has actually occurred and the user misidentified that the heat medium leak has occurred, causing the user to make unnecessary correspondence, as described below, In the heat medium leakage determination process, the occurrence of the heat medium leakage can be accurately determined.

  Specifically, in the heat medium leakage determination process, the control unit 4 satisfies the leakage determination condition because the decrease in the amount of the heat medium in the expansion tank 7 that occurs when the supply of the heat medium to the terminal 1 is started. However, it is determined that the leakage determination condition is not satisfied. In the present embodiment, the leakage determination condition is that the heat medium amount in the expansion tank 7 reaches the set lower limit amount VL within the heat medium amount decrease monitoring set time Tw after the heat medium amount reaches the set upper limit amount VH.

  In other words, when the circulating supply of the heat medium to the terminal 1 is started, the heat medium flows back to the expansion tank 7 due to the effect of the air pool formed by the air that has permeated from the outside into the heat medium circuit C. The amount of the heat medium in the expansion tank 7 increases, and in some cases, exceeds the set upper limit amount VH, reaches the overflow amount VOF, and is discharged to the outside through the overflow pipe 22 (hereinafter, this phenomenon is referred to as heat medium dropping). The amount of the heat medium held in the heat medium circuit C decreases. Therefore, when the supply of the heat medium by the circulation pump 8 proceeds after the heat medium has dropped, the amount of the heat medium held in the heat medium circuit C is small, so that expansion occurs due to the release of the air pocket. In some cases, the amount of the heat medium in the tank 7 gradually decreases and reaches the set lower limit amount VL.

  Further, when the amount of the heat medium in the expansion tank 7 before the start of circulation supply of the heat medium has decreased to an amount close to the set lower limit amount VL due to the evaporation of the heat medium to the atmosphere, the heat medium is nearly dropped. Similarly, when a phenomenon (for example, a phenomenon in which the amount of the heat medium in the expansion tank 7 does not reach the overflow amount VOF but increases to the set upper limit amount VH) occurs, May be released and the amount of heat medium in the expansion tank 7 may gradually decrease to reach the set lower limit amount VL.

  As described above, when the circulating supply of the heat medium to the terminal 1 is started, the heat medium amount in the expansion tank 7 is set within the heat medium amount decrease monitoring set time Tw after reaching the set upper limit amount VH. The limit amount VL may be reached, and in fact, the heat medium leakage determination condition may be satisfied even though the heat medium leakage does not occur. Therefore, in the heat medium leakage determination process, even if the decrease in the amount of the heat medium in the expansion tank 7 that occurs when the circulating supply of the heat medium to the terminal 1 starts satisfies the leakage determination condition, the leakage determination condition is By determining that the heating medium is not satisfied, the erroneous determination of the leakage of the heating medium is prevented when the circulating supply of the heating medium is started.

  Then, the controller 4 starts the circulating supply of the heat medium to the terminal 1 and until the initial supply period setting time elapses, the decrease in the amount of the heat medium in the expansion tank 7 satisfies the leakage determination condition. However, it is determined that the leakage determination condition is not satisfied. That is, “when the circulating supply of the heating medium to the terminal 1 is started” is “a time period from the start of the circulating supply of the heating medium to the terminal 1 until the set time for the initial supply period elapses”. Yes. The set time for the initial supply period takes into consideration the path length of the circulation circuit C, the discharge capacity of the circulation pump 8, and the like, and almost all of the air pools scattered in the circulation circuit C are moved by the circulation supply performed during that time. Thus, the time required for opening to the atmosphere in the expansion tank 7 is set. In the present embodiment, the initial supply period setting time is set to 3 minutes.

  In addition, when the suspension time Tbr as the heat medium supply stop time from the end of the circulation supply of the heat medium to the terminal 1 to the restart is equal to or longer than the long-term supply stop determination setting time, the control unit 4 Even if the decrease in the amount of the heat medium in the expansion tank 7 that occurs when the circulating supply of the heat medium is started satisfies the leakage determination condition, it is determined that the leakage determination condition is not satisfied. The long-term supply stop determination setting time is such that the amount of air that permeates the circulation circuit C over the time is reduced to the extent that the amount of the heat medium in the expansion tank 7 satisfies the leakage determination condition when the circulation supply is resumed. Appropriate time is set as the time of staying in the amount of air so that there is not. In the present embodiment, the long-term supply stop determination setting time is set to 120 hours.

  That is, after 3 minutes have elapsed since the start of circulating supply of the heating medium to the terminal 1, almost all of the air pockets scattered in the heating medium circuit C move to the expansion tank 7 by circulating supply for 3 minutes. Since it is considered to have been released to the atmosphere, the air supply is not released by the subsequent circulation of the heating medium, and the amount of the heating medium in the expansion tank 7 does not decrease so as to satisfy the leakage determination condition. After 3 minutes have elapsed since the start of circulating supply of the medium, it is determined that the condition for leakage determination is satisfied without determining that the condition is not satisfied even if the condition for leakage determination is satisfied.

  Further, when the suspension time Tbr from the end of the circulation supply of the heat medium to the terminal 1 until the restart is short, the amount of air penetrating into the heat medium circuit C is small, and therefore when the circulation supply is resumed. In addition, since it is considered that the decrease in the amount of the heat medium in the expansion tank 7 due to the release of air that has permeated during the downtime Tbr does not satisfy the condition for leak determination, the condition for leak determination is satisfied in such a situation. In such a case, it is determined that the leakage determination condition is satisfied because there is a possibility that leakage has occurred.

  When the decrease in the amount of heat medium in the expansion tank 7 may satisfy the conditions for leakage determination, when the control unit 4 determines that the conditions are satisfied and does not satisfy the conditions in the heat medium leakage determination process When these cases are classified based on the suspension time Tbr until the heating medium circulation supply to the terminal 1 is started and the elapsed time since the heating medium circulation supply is started, as shown in FIG. become. As can be seen from FIG. 5, the expansion supply of the heating medium is resumed at 120 o'clock after the end of the previous circulation supply, and is generated within 3 minutes from the start of the restarted circulation supply. If the decrease in the amount of the heating medium may satisfy the condition for determining the leak, the control unit 4 determines that the condition for determining the leak is not satisfied, but otherwise, the condition for determining the leak It is determined to satisfy.

  Hereinafter, the heat medium leakage determination process executed by the control unit 4 will be described based on the flowchart shown in FIG.

  In the heat medium leakage determination process, when the circulation of the heat medium is started, it is determined as Yes in Step # A1, and the date and time when the previous circulation supply is ended in Step # A2 (stored in the control unit 4). Then, the stop time Tbr is calculated from the date and time when the current circulation supply is started, and in step # A3, an initial operation time timer T1 for counting the elapsed time since the start of the current circulation supply is started.

  In step # A4, the heat medium amount in the expansion tank 7 is in a standby state until it reaches the set upper limit amount VH, and is expanded for some reason (such as replenishment of the heat medium or back flow to the expansion tank 7 at the start of circulation supply). When the amount of the heat medium in the tank 7 increases and reaches the set upper limit amount VH, the process proceeds from step # A4 to step # A5, and the time measurement of the decrease time timer T2 starts. Then, until the amount of the heat medium in the expansion tank 7 decreases and reaches the set lower limit amount VL, the time measurement of the decrease time timer T2 proceeds in step # A6. When the amount of the heat medium in the expansion tank 7 reaches the set lower limit amount VL, the process proceeds to step # A7 and the time of the decrease time timer T2 stops, and in step # A8, the value of the decrease time timer T2 at that time is the amount of heat medium. It is compared with a set time Tw for decrease monitoring (in this embodiment, it is set to 30 hours as a monitoring time in consideration of the decreasing rate of the heat medium amount due to evaporation). If the set upper limit amount VH decreases from the set upper limit amount VH to the set lower limit amount VL in a short time of 30 hours or less, it is assumed that a heat medium leak may have occurred, and the process proceeds to step # A9 and takes a time longer than 30 hours. If the set upper limit amount VH is reduced to the set lower limit amount VL, it is determined that there is no possibility that the heat medium has leaked, and the process proceeds to step # A11. The decrease time timer T2 is reset to “0” in preparation for the time from when the set upper limit amount VH is replenished until the set lower limit amount VL is reached.

  In step # A9, the pause time Tbr calculated in step # A2 is referenced. If the value is 120 hours or more set as the long-term supply stop determination setting time, the heat medium temporarily associated with the start of circulation supply Since there is a possibility that a significant decrease has occurred, the process proceeds to step # A10 to confirm this. If the downtime Tbr is shorter than 120 hours, the amount of air penetrating into the heat medium circuit C is small in such a short time, so the amount of heat medium in the temporary expansion tank 7 of the heat medium accompanying the start of circulation supply is reduced. Since it is unlikely that a decrease has occurred and the amount of heat medium in the expansion tank 7 may have decreased due to heat medium leakage, it is determined that the condition for determining leakage has been established, and the process proceeds to step # A12. To do.

  In step # A10, if the initial time timer T1 at that time is 3 minutes or less set as the initial supply period setting time, the suspension time Tbr is 120 hours or more. Since it is almost certain that the amount of heat medium in the expansion tank 7 accompanying the temporary decrease has occurred, it is determined that the leakage determination condition is not satisfied, and the process proceeds to step # A11. If the value of the initial operation time timer T1 indicates a time longer than 3 minutes, after such time has elapsed from the start of the circulation supply, the amount of the heat medium in the expansion tank 7 accompanying the start of the circulation supply is no longer present. Since it is unlikely that a temporary decrease has occurred and there is a possibility that a decrease in the heat medium due to an actual heat medium leak has occurred, it is determined that the condition for determining the leak has been established, and the process proceeds to step # A12. Transition.

  As described above, in the present embodiment, the decrease time timer T2 for measuring the time required for the amount of the heat medium in the expansion tank 7 to decrease from the set upper limit amount VH to the set lower limit amount VL is the set time for monitoring the heat medium amount decrease. If a time longer than Tw is indicated, it is not determined that the leakage determination condition is satisfied, so that it is not determined that a heat medium leak has occurred, but in other cases, that is, the heat medium in the expansion tank 7 If the amount decreases from the set upper limit amount VH to the set lower limit amount VL in a time shorter than the heat medium amount decrease monitoring set time Tw, it leaks within 3 minutes immediately after the start of circulation of the heat medium after 120 hours. If the condition for determination is not satisfied, it is determined that the condition for leakage determination is satisfied, and it is determined that the heat medium leakage has occurred, and within 3 minutes immediately after the start of circulation of the heat medium after 120 hours Satisfy the conditions for leak detection If it is, as a temporary decrease in the heat medium due to the circulation and supply start of the heat medium, by determined not to satisfy the leakage determination condition, not determined that the heat medium leakage has occurred. Therefore, it is possible to prevent erroneous determination that the heat medium leakage has occurred when the circulation supply of the heat medium is started.

  For example, when the suspension time Tbr is 120 hours or more and the circulation of the heat medium is started in a state where an air pocket is formed in the heat medium circuit C, the amount of the heat medium in the expansion tank 7 is as shown in FIG. As shown in (a) and (b), there is a case where the increase / decrease change occurs, but the value of the decrease time timer T2 at the time when such increase / decrease change occurs and the amount of the heat medium becomes the set lower limit amount VL is Even if the heat medium amount decrease monitoring set time Tw may be reached, according to the heat medium leakage determination process as described above, if the heat medium amount decreases until 3 minutes have passed, the leakage determination Since it is not determined that the use condition is satisfied, it is possible to prevent erroneous determination that the heat medium leakage has occurred when the circulating supply of the heat medium is started.

  FIG. 7 (a) shows that the heat medium flows back to the expansion tank 7 with the start of circulation supply of the heat medium (the start of time measurement of the initial operation time timer T1), and the amount of the heat medium in the expansion tank 7 increases (set upper limit amount). The time of the decrease time timer T2 starts when VH is exceeded), and while the reverse flow continues and overflow occurs, the amount of heat medium in the expansion tank 7 does not change with the overflow amount VOF, and the subsequent heat medium When the amount of the heat medium in the expansion tank 7 decreases due to the movement of the air pool in the heat medium circuit C and the release to the atmosphere due to the circulation supply of the heat medium, and reaches the set lower limit amount VL (the time measurement of the decrease time timer T2 ends) When the supply of the heat medium is started, the amount of the heat medium in the expansion tank 7 starts to increase, and when the set upper limit amount VH is reached, the supply of the heat medium is completed and the increase in the amount of the heat medium in the expansion tank 7 is completed. After that, when the heat medium amount in the expansion tank 7 starts to decrease due to evaporation, And Tsu, when accompanied by overflow by starting the circulation and supply of the heating medium, shows how the increase or decrease of the heat medium of the expansion tank 7 after the start of circulation and supply. For convenience of explanation, in the figure, the value measured by the initial operation time timer T1 is indicated by T1, and the value measured by the decrease time timer T2 is indicated by T2.

  FIG. 7 (b) shows that the heat medium flows back to the expansion tank 7 with the start of circulation supply of the heat medium (the time measurement of the initial operation time timer T1 starts), and the amount of the heat medium in the expansion tank 7 increases. Before reaching the limit VH, the increase in the amount of the heat medium due to the backflow is completed, and then the amount of the heat medium in the expansion tank 7 gradually increases due to the release of the air pool in the heat medium circuit C to the atmosphere by the subsequent circulation of the heat medium. When the temperature reaches the set lower limit VL, the supply of the heat medium is started and the amount of the heat medium in the expansion tank 7 starts to increase, and when the set upper limit VH is reached (time reduction of the decrease time timer T2 starts) Thus, the supply of the heat medium is completed, and the increase of the amount of the heat medium in the expansion tank 7 is completed. Thereafter, the expansion of the heat medium in the heat medium circuit C by the circulation supply of the heat medium and the release to the atmosphere When the amount of the heat medium in the tank 7 decreases and reaches the set lower limit amount VL (the total of the decrease time timer T2 At the end, the supply of the heat medium is started and the amount of the heat medium in the expansion tank 7 starts to increase. When the set upper limit amount VH is reached, the supply of the heat medium is completed and the amount of the heat medium in the expansion tank 7 is reached. After the increase is completed, the heat medium amount in the expansion tank 7 starts to decrease due to evaporation, and the heat medium is not dropped due to the start of the circulation supply of the heat medium. It shows how the amount of heat medium increases or decreases. For convenience of explanation, in the figure, the value measured by the initial operation time timer T1 is indicated by T1, and the value measured by the decrease time timer T2 is indicated by T2.

Second Embodiment The second embodiment in the point can perform circulation and supply of each separate heating medium to a plurality of terminals and performs control control content of the control unit 4 corresponding to a plurality of terminals Since the configuration is the same as that of the first embodiment except for the points, differences from the first embodiment will be described below.

  As shown in FIG. 11, in this embodiment, the terminal 1 is composed of three terminals, a first terminal 1A, a second terminal 1B, and a third terminal 1C, and the remote controller 5 is also a first terminal corresponding to the first terminal 1A. The remote controller 5A includes a second remote controller 5B corresponding to the second terminal 1B, and a third remote controller 5C corresponding to the third terminal 1C. In this embodiment, the second terminal 1B is installed on the second floor, the first terminal 1A and the third terminal 1C are installed on the first floor, and the heat source unit 3 is installed on the first floor.

  The terminal side circulation path 2 is composed of an outward flow path 2f and a return flow path 2r, and the forward flow path 2f and the return flow path 2r are connected to each of the plurality of terminals 1A to 1C. ing. The flow path 6 in the heat source machine 3 of the heat source machine 3 is branched and connected to a plurality of forward flow paths 2f by a forward header 20f as a heat medium supply section, and the heat medium return side The medium return portion and the return side header 20r are joined and connected to the plurality of return side channels 2r, and a thermal valve 21 is provided in each of the plurality of forward side channels 1f. The heat source device 3 is configured to supply a heat medium to each of the plurality of terminals 1A to 1C by opening and closing the plurality of thermal valves 21 individually. And in this embodiment, the heat-medium circuit C is comprised by the some terminal side circulation path 2, the heat source machine internal flow path 6, the expansion tank 7, etc. corresponding to every terminal.

  The control unit 4 of the heat source device 3 and the respective remote controllers 5A to 5C provided corresponding to the plurality of terminals 1A to 1C include control information such as operation start and operation stop of the terminal 1 and operation status information of the heat medium supply device. Etc. are configured to communicate freely. And the control part 4 is comprised so that the heat-medium supply operation | movement may be performed separately with respect to several terminal 1A-1C based on the instruction | command from the remote control 5. FIG.

  As described above, the control unit 4 connects each of the plurality of terminals 1A to 1C connected in a parallel state between the outgoing header 20f and the return header 20r and in a state where the circulating supply of the heat medium is interrupted. It is comprised so that the circulation supply state of the heat medium about may be managed.

  In the present embodiment, the number of times that the control unit 4 determines that the decrease in the amount of the heat medium in the expansion tank 7 satisfies the leakage determination condition based on the detection information of the lower limit sensor 24 is the set time for determination ( In this embodiment, it is set to 64 hours.) Heat medium leakage determination for determining that a heat medium leakage has occurred by reaching the set number of times for determination (set to 3 in this embodiment). When the heat medium held in the heat medium circuit C leaks to the outside of the circuit, the heat medium leak can be detected. In the present embodiment, the leakage determination condition is that the amount of the heat medium in the expansion tank 7 reaches the set lower limit amount VL. Note that, when it is determined by the heat medium leakage determination process that a heat medium leakage has occurred, the process when the heat medium leakage occurs is the same as in the first embodiment.

  As described above, in the heat medium leakage determination process of the present embodiment, when the decrease in the amount of the heat medium in the heat medium storage tank satisfies the leakage determination condition within 64 hours, it may be repeatedly determined three times. By determining that a heat medium leak has occurred, it is possible to accurately determine the continuous decrease in the heat medium in the expansion tank 7 by a minute amount due to the heat medium leak, It can be distinguished from a decrease in the amount of heat medium in the expansion tank 7 due to evaporation.

  Further, in the heat medium leakage determination process of the present embodiment, when the heat medium leakage does not actually occur but the decrease in the amount of the heat medium in the heat medium storage tank may satisfy the leakage determination condition. In this case, it is possible to maintain the discrimination accuracy by preventing a misjudgment count from being included until the number of times that the leak judgment condition is satisfied is reached three times. I am trying.

  Specifically, in the heat medium leakage determination process, a decrease in the amount of the heat medium in the expansion tank 7 that occurs when the circulation of the heat medium is started to any of the plurality of terminals 1A to 1C is used for leakage determination. Even if the condition is satisfied, it is determined that the leakage determination condition is not satisfied.

  Hereinafter, the heat medium leakage determination process executed by the control unit 4 will be described based on the flowchart shown in FIG.

  In the heat medium leakage determination process, when circulation supply of the heat medium to any one of the plurality of terminals 1A to 1C is started, “Yes” is determined in step # B1, and in step # B2, the control unit 4 The suspension time Tbr for the terminal is calculated from the date and time when the previous circulation supply is stored and the date and time when the current circulation supply is started, and is stored in step # B3. An initial operation time timer T1 for counting elapsed time is started.

  In step # B4, the expansion tank 7 is in a standby state until the amount of the heat medium in the expansion tank 7 reaches the set lower limit amount VL. For some reason (e.g., evaporation of the heat medium or discharge of an air reservoir when starting circulation supply) When the amount of the heat medium in 7 decreases and reaches the set lower limit amount VH, the process proceeds from step # B4 to step # B5.

  In step # B5, the suspension time Tbr calculated in step # B2 is referred to. If the value is equal to or longer than the long-term supply stop determination set time (120 hours in this embodiment), the circulation supply is performed. Assuming that there is a possibility that the heat medium has temporarily decreased due to the start, the process proceeds to step # B6 in order to confirm this. If the downtime Tbr is shorter than 120 hours, the amount of air that permeates into the terminal-side circuit 2 corresponding to the terminal in the heat medium circuit C is small in such a short time, so that the heat medium accompanying the start of circulation supply is reduced. It is unlikely that a temporary heat medium decrease has occurred, and it is determined that the condition for leak detection has been established, assuming that the heat medium may have decreased due to an actual heat medium leak. The process proceeds from # B5 to step # B7.

  In Step # B6, if the value of the initial operation time timer T1 at that time is equal to or less than the initial supply period setting time (set to 3 minutes in the present embodiment), the pause time Tbr is 120 hours or more. For this reason, it is almost certain that the amount of the heat medium in the expansion tank 7 is temporarily reduced due to the start of the circulation supply, so that it is determined that the leakage determination condition is not satisfied, and step # B7 is executed. The process proceeds to step # B8 without going through. If the value of the initial operation time timer T1 indicates a time longer than 3 minutes, after such time has elapsed from the start of the circulation supply, the amount of the heat medium in the expansion tank 7 accompanying the start of the circulation supply is no longer present. Since it is unlikely that a temporary decrease has occurred and there is a possibility that a decrease in the heat medium due to an actual heat medium leak has occurred, it is determined that the condition for determining the leak has been established, and from step # B6 The process proceeds to step # B7.

  In step # B7, the determination number counter CNT is incremented. In the process of step # B7, when circulation supply of the heat medium is started to the terminal whose rest time Tbr is 120 hours, the expansion tank 7 is kept until 3 minutes have passed since the circulation supply was started. Even if the amount of the heating medium is reduced to the set lower limit amount VL and the condition for leakage determination is satisfied, it is not executed.

  Even when the circulation of the heating medium is started at different times with respect to another terminal, the pause time Tbr for that terminal is calculated in step # B1, and the terminal for which circulation supply has been started first is performed. In step # B3, the initial operation time timer T1 in which the time measurement is in progress starts re-counting for the terminal, so the processing in step # B5 and step # B6 is performed for the terminal for which circulation supply has been started first. Processed under treatment and conditions. That is, the control unit 4 maintains the pause time Tbr for the terminal that has recently started circulating supply of the heat medium, and counts the elapsed time from the start of circulating supply by the timer T1 in step # B5. And the process of step # B6 is performed.

  In this way, it is determined whether or not the leakage determination condition as shown in FIG. 5 is satisfied based on the value of the pause time Tbr and the initial operation time timer T1 for the terminal for which the circulating supply of the heat medium has been started most recently. If it is determined that the condition for leakage determination is satisfied, whether or not the process of step # B7 is possible is determined based on the result.

  In step # B8, the value of the determination number counter CNT is checked, and if it has not reached "3", the process directly returns to step # B1. If “3” has been reached, the process proceeds to step # B9, where the number of determinations is determined from the date and time when the determination number counter CNT becomes “1” (stored in the control unit 4) and the current time. The time required for the counter CNT to become “3” from “1” is calculated, and it is checked whether it is 64 hours or less. If it is 64 hours or less, it is determined that the heat medium leak has occurred. And it transfers to step # B11 and performs the process at the time of heat medium leak occurrence. If the time taken for the determination number counter CNT to become “3” from “1” is longer than 64 hours, the value of the determination number counter CNT is reset to “0” and the process proceeds to step # B1. Return.

  As described above, the control unit 4 determines that the heat medium leakage has occurred when the number of times that the condition for leakage determination is satisfied reaches the number of times for determination (3 times) within the setting time for determination (64 hours). However, if the circulation supply of the heat medium to any one of the plurality of terminals 1A to 1C is started after a suspension period Tbr of 120 hours or more for the terminal that is the target of the current circulation supply, the circulation supply of the heat medium is performed. Until the elapse of 3 minutes from the start of the operation, even if the amount of the heat medium in the expansion tank 7 reaches the set lower limit amount VL and satisfies the condition for leakage determination, it is determined that the condition for leakage determination is not satisfied. Therefore, it is not counted as the number of times that satisfies the condition for leakage determination.

  Accordingly, it is possible to prevent erroneous determination that the leakage determination condition is satisfied even when the heating medium circulation supply is started, but the value of the determination number counter CNT becomes 3. It is possible to make the discrimination information about the occurrence of the heat medium leak discriminated in (1) highly reliable.

[ First Reference Example ] The first reference example has the same configuration as that of the second embodiment except that the content of the heat medium leakage determination process executed by the control unit 4 is different. Differences from the embodiment will be described.

In the present reference example , the control unit 4 is configured to manage the circulating supply state of the heat medium for each of the plurality of terminals 1A to 1C in the heat medium leakage determination process, and the detection information of the lower limit sensor 24 is used. On the basis of this, the number of times when it is determined that the decrease in the amount of the heat medium in the expansion tank 7 satisfies the condition that the amount of the heat medium in the expansion tank 7, which is a leakage determination condition, reaches the set lower limit amount VL, When the decrease in the amount of the heat medium in the expansion tank 7 that occurs when the circulation of the heat medium is started for any one of the above satisfies the leakage determination condition, the heat medium of the plurality of terminals 1A to 1C Addition of the determination number counter CNT for the terminal 1 that has started circulation supply, and does not add the constant number counter CNT for the other terminals 1, and circulation of the heat medium to any of the plurality of terminals 1A to 1C Start supplying When the decrease in the amount of the heat medium in the expansion tank 7 that occurs at other times satisfies the conditions for leakage determination, the determination times counter CNT for each of the plurality of terminals 1A to 1C is added, and the plurality of terminals 1A to 1 Counting is performed in correspondence with each of 1C, and any of the plurality of determination number counters CNT is configured to determine that a heat medium leak has occurred when the determination set number of times is reached within the determination set time. Yes.

In other words, for each terminal 1A to 1C, the control unit 4 sets initial time timers T1 (A) to T1 (C), initial circulation supply state flags FLG (A) to FLG (C), and a determination counter CNT. The circulation supply state of the heat medium for each of the plurality of terminals 1A to 1C is managed by (A) to CNT (C) or the like. Specifically, it is determined whether or not the initial supply period setting time (set to 3 minutes in this reference example ) has elapsed since the start of circulating supply of the heat medium. By determining based on the value of (C) and reflecting the initial circulation supply state flags FLG (A) to FLG (C) for the terminals 1A to 1C for which the initial supply period set time has elapsed, a plurality of terminals 1A Each of ˜1C manages whether or not the initial supply period setting time has not yet elapsed since the start of the supply of the heat medium.

  Then, the number of times of determining that the leakage determination condition is satisfied is stored in correspondence with each of the terminals 1A to 1C by the determination number counters CNT (A) to CNT (C) prepared for each of the terminals 1A to 1C. In the case where the amount of the heat medium in the expansion tank 7 is reduced to the set lower limit amount VL, the decrease in the amount of the heat medium is the circulation supply of the heat medium to any one of the terminals 1A to 1C. When it is due to a temporary decrease in the heat medium accompanying the start, among the determination number counters CNT (A) to CNT (C), the one corresponding to the terminal 1 in the initial circulation supply state is incremented, and the initial circulation supply is performed. The terminal 1 that is not in a state is not incremented.

  As a result, the determination number counters CNT (A) to CNT (C) for each of the terminals 1A to 1C are prevented from being incremented as much as possible due to the influence of the start of circulating supply of the heat medium to the terminals 1 that do not correspond to each other. Thus, the occurrence of the heat medium leakage can be accurately determined.

  For example, in the situation where no heating medium has been circulated and supplied to any terminal 1 for the past 120 hours or more, the second terminal 1B, the third terminal 1C, and the first terminal 1A When the circulating supply of the heat medium is started sequentially and the amount of the heat medium in the expansion tank 7 increases or decreases as shown in FIG. 9, the amount of the heat medium in the expansion tank 7 is set at time tL1, tL2, and tL3. It will be reduced to the limit amount VL and the condition for leak determination will occur three times in total. In FIG. 9, the amount of change in the value of each determination number counter CNT (A), CNT (B), and CNT (C) is displayed by a “+” symbol, and the cumulative count value is displayed in parentheses.

  Here, the decrease in the amount of the heat medium at the time tL1 is not a decrease due to the leakage of the heat medium, but is a temporary decrease in the amount of the heat medium due to the start of circulating supply of the heat medium to the second terminal 1B at the time tb. Only the determination number counter CNT (B) for the second terminal 1B that is in the initial circulation supply state at the time tL1 is incremented, and the determination number for the other terminals (the first terminal 1A and the third terminal 1C). The counters CNT (A) and CNT (C) are not incremented and the current state is maintained.

  In addition, the decrease in the amount of the heat medium at time tL2 is not a decrease due to the leakage of the heat medium, but is a temporary decrease in the amount of the heat medium due to the start of circulating supply of the heat medium to the third terminal 1C at time tc. Only the determination number counter CNT (C) for the third terminal 1C that is in the initial circulation supply state at time tL2 is incremented, and the determination number counter CNT for the other terminals (first terminal 1A and second terminal 1B). (A) and CNT (B) are not incremented and the current state is maintained.

  Further, the decrease in the amount of the heat medium at time tL3 is not a decrease due to the leakage of the heat medium, but is a temporary decrease in the amount of heat medium due to the start of circulating supply of the heat medium to the first terminal 1A at time ta. The determination number counters CNT (A) and CNT (C) for the first terminal 1A and the third terminal 1C that are in the initial circulation supply state at the time tL3 are incremented, and the other terminals (second terminal 1B) The determination number counter CNT (B) is not incremented and the current state is maintained.

  As shown in FIG. 9, the increase or decrease in the amount of heat medium in the expansion tank 7 due to the start of circulating supply of the heat medium to the second terminal 1B reaches the overflow amount VOF (with heat medium dropping). On the other hand, the increase or decrease in the amount of the heat medium in the expansion tank 7 due to the start of circulation supply of the heat medium to the third terminal 1C and the first terminal 1A does not reach the overflow amount VOF and the set upper limit amount VH. Among them, the first terminal that started circulating the heat medium is the second terminal 1B, and since the second terminal 1B is installed on the second floor, the condition that the heat medium is likely to drop is met. Because. However, even when the supply of the heat medium to any of the terminals 1A to 1C is started, the heat medium amount increases or decreases with the heat medium dropping, or the heat medium amount increases or decreases without the heat medium dropping. Sometimes it can be done. In any case, when the circulation of the heating medium to each of the terminals 1A to 1C is started, if the amount of the heating medium in the expansion tank 7 decreases to the set lower limit amount VL, each determination is performed in the manner described above. The value of the number counter CNT changes.

Below, the heat medium leak discrimination | determination process which the control part 4 in this reference example performs is demonstrated based on the flowchart shown in FIG.

  In the heat medium leakage determination process, when circulation supply of the heat medium to any one of the plurality of terminals 1A to 1C is started, it is determined as Yes in Step # C1, and the processes of Step # C2 to Step # C4 are performed. Executed. In step # C2, the initial circulation supply state flag FLG corresponding to the terminal (terminal that has started circulation supply of the heat medium) is set to “1”, and the fact that the terminal is in the initial circulation state is reflected in the flag. . In Step # C3 and Step # C4, the same processing as in the second embodiment is performed for the pause time Tbr and the initial movement time timer T1 corresponding to the terminal.

  That is, in step # C2, the suspension time Tbr for the terminal is calculated from the date and time when the previous circulation supply is completed (the control unit 4 stores each terminal) and the date and time when the current circulation supply is started. In step # C3, an initial operation time timer T1 corresponding to the terminal for which circulation supply has been started is started. If the circulating supply of the heat medium to any one of the plurality of terminals 1A to 1C is not started, it is determined as No in Step # C1, and the process proceeds to Step # C5 without performing the processes of Step # C2 to Step # C4. To do. In short, the processing of Step # C2 to Step # C4 is executed only when the circulating supply of the heat medium to any one of the terminals 1 is started (instant).

  In Step # C7, the state is in a standby state until the amount of the heat medium in the expansion tank 7 reaches the set lower limit amount VL, and for some reason (e.g., evaporation of the heat medium or discharge of an air pool at the start of circulation supply). When the amount of heat medium in 7 reaches the set lower limit amount VH and satisfies the condition for leakage judgment, it is confirmed whether the decrease in the amount of heat medium is caused by the start of circulation supply of the heat medium. In order to do so, the processing of step # C8 to step # C10 is executed.

  Until the amount of the heat medium in the expansion tank 7 reaches the set lower limit amount VL, the terminal whose initial circulation supply state flag is set to “1” among the three initial operation time timers T1 (A) to T1 (C) The value of the initial operation time timer T1 is monitored, and if the initial supply period setting time (3 minutes) has elapsed since the start of circulating supply of the heat medium to the terminal, it is determined Yes in step # C5 and The value of the initial circulation supply state FLG to be reset is reset to “0” (step # C6). That is, it is possible to identify whether each terminal is in the initial circulation supply state by referring to the value of the initial circulation supply state flag for each terminal.

When the amount of heat medium in the expansion tank 7 reaches the set lower limit value VL, before incrementing the value of each determination number counter in step # C11, it is checked in step # C8 whether there is a terminal in the initial circulation supply state, If any terminal 1 is in the initial circulation supply state, the process proceeds to step # C9. In step # C9, the suspension time (calculated in step # C3) for the terminal 1 in the initial circulation supply state is referred to, and when there are a plurality of terminals 1 in the initial circulation supply state, those terminals are referred to. It is determined whether or not any value of the suspension time Tb corresponding to is longer than the long-term supply stop determination setting time (in this reference example, it is set to 120 hours).

  If the circulating supply of the heat medium to the terminal 1 that is in the initial circulating supply state is started after the suspension time Tbr that is equal to or longer than the long-term supply stop determination setting time (120 hours) has elapsed, the circulation supply is started. In such a case, the determination counter CNT corresponding to the terminal 1 that is in the initial circulation supply state is incremented and the initial value is initialized. The determination number counter CNT corresponding to the terminal 1 that is not in the circulation supply state is not incremented, but is maintained as it is.

  If the circulating supply of the heat medium to the terminal 1 in the initial circulation supply state is started before the stop time Tbr equal to or longer than the long-term supply stop determination setting time (120 hours) elapses, such a short time is required. In time, the amount of air that permeates into the terminal-side circulation path 2 corresponding to the terminal in the heat medium circuit C is small, so it is difficult to think that a temporary decrease in the heat medium due to the start of circulation supply occurs. Therefore, in such a case, determination number counters CNT (A) to CNT (C) corresponding to all the terminals 1 are incremented in step # C11.

  If none of the terminals 1 is in the initial circulation supply state, it is determined No in Step # C8, the process proceeds to Step # C11, and the determination number counters CNT (A) to CNT (C) corresponding to all the terminals 1 are detected. ) Is incremented. That is, even if the circulation supply has started in the past, after a sufficient time has passed, there is a possibility that the amount of the heat medium in the expansion tank 7 is temporarily reduced due to the start of the circulation supply. Therefore, all the determination counters CNT (A) to CNT (C) are incremented on the assumption that there is a possibility that the heat medium is reduced due to actual heat medium leakage.

In step # C12, the values of the determination number counters CNT (A) to (C) are checked, and if there is nothing that has reached the set number of times for determination (set to “3” in this reference example ), Return to Step # C1. If there is an object that has reached “3”, the process proceeds to step # C13, the date and time when the determination counter CNT becomes “1” (stored in the control unit 4), the current time, From this, the time required for the determination number counter CNT to become “3” from “1” is calculated (when a plurality of determination number counters CNT reach “3”, each determination number counter CNT is The time required from “1” to “3” is calculated), and the value (the time required from “1” to “3” for a plurality of determination counters CNT) is calculated. In the case of calculation, it is checked whether or not each of these values is equal to or shorter than a set time for determination (which is set to 64 hours in this reference example ). “1” for CNT In the case where the time required to reach “3” is calculated, if any of the plurality of values is 64 hours or less), it is determined that a heat medium leak has occurred, and step # The process shifts to C14 to execute the process when the heat medium leaks. If the time taken for the determination number counter CNT to become “3” after being “1” is longer than 64 hours (from “1” for a plurality of determination number counters CNT to “3”). When the time required to reach the value is calculated, if all of the plurality of values are longer than 64 hours), the determination number counter CNT having a count value of “3” (when there are a plurality of values) Resets the values of all relevant determination count counters CNT) to “0” and returns to step # B1.

[Another embodiment]
Hereinafter, other embodiments are listed.

  (1) In the first embodiment, the leakage determination condition reaches the set lower limit amount VL within the heat medium amount decrease monitoring set time Tw after the heat medium amount in the expansion tank 7 reaches the set upper limit amount VH. Although what is a condition was illustrated, instead of this, the condition for leakage determination may be a condition in which the amount of the heat medium in the expansion tank 7 reaches the set lower limit amount VL.

(2) In the second embodiment and the first reference example described above, the leakage determination condition is an example in which the amount of the heat medium in the expansion tank 7 reaches the set lower limit amount VL. In both or any one of the second embodiment and the first reference example , the leakage determination condition is within the set time Tw for monitoring the heat medium amount decrease after the heat medium amount in the expansion tank 7 reaches the set upper limit amount VH. Alternatively, a condition that reaches the set lower limit VL may be used.

(3) In the second embodiment and the first reference example , the leakage determination condition reaches the set lower limit amount that is the same heat medium amount as the heat medium amount when the heat medium replenishing means starts replenishing the heat medium. However, even if the condition for leakage determination reaches the set amount for leakage determination, which is a heat medium amount different from the heat medium amount when the heat medium replenishing means starts replenishing the heat medium. Good.

(4) In the first embodiment, an example in which the heat medium supply terminal is configured by one unit is illustrated. However, similarly to the second embodiment and the first reference example , the heat medium supply terminal is configured by a plurality of units. It may be. Moreover, in the said 2nd Embodiment, although the thing with which the heat-medium supply terminal was comprised by multiple units was illustrated, similarly to 1st Embodiment, even if the heat-medium supply terminal is comprised by 1 unit | set, Good.

  (5) Discrimination setting times (3 times) and discrimination setting time (64 hours), long-term supply stop discrimination setting time (120 hours), heat medium amount decrease monitoring setting time exemplified in the description of each embodiment above The values of various set times such as Tw (30 hours) and the initial supply period set time (3 minutes) can be appropriately changed according to the embodiment of the present invention.

Schematic configuration diagram of the heat medium supply device and the heat medium supply terminal in the first embodiment Control block diagram of heating medium supply device Flow chart of heat medium replenishment process The figure which shows the mode of the fluctuation | variation of the amount of heat medium in an expansion tank by the increase by a heat-medium supply means, and the decrease by evaporation Table showing a determination mode of whether or not the conditions for leakage determination in the first and second embodiments are satisfied Flowchart of heat medium leakage determination process in the first embodiment The figure which shows the example of increase / decrease in the amount of the heat medium in an expansion tank when the circulation supply of the heat medium in 1st Embodiment is started Flowchart of heat medium leakage determination process in the second embodiment The figure which shows the example of increase / decrease in the amount of the heat medium in an expansion tank when the circulation supply of the heat medium in a 1st reference example is started, and the change of the value of the initial circulation supply state flag and the determination frequency counter accompanying the increase / decrease Flowchart of heat medium leakage determination process in the first reference example Schematic configuration diagram of the heat medium supply device and the heat medium supply terminal in the second embodiment and the first reference example

Explanation of symbols

Tw Heat medium amount decrease monitoring set time VH Setting upper limit amount VL Setting lower limit amount 1 Heat medium supply terminal 4 Operation control means 6 Apparatus side heat medium circulation path 7 Heat medium storage tank 8 Heat medium circulation pump 10 Heat medium heating section 20f Heat medium supply section 20r Heat medium return sections 23, 24 Heat medium amount detection means 25, 26 Heat medium supply means

Claims (5)

The apparatus side formed so as to span the heat medium return part from the heat medium supply terminal and the heat medium supply part to the heat medium supply terminal in a form passing through the heat medium heating part and the open air type heat medium storage tank A heating medium circuit,
A heat medium circulation pump that is equipped in the apparatus side heat medium circulation path and circulates the heat medium;
Based on the detection information of the heat medium amount detecting means for detecting the amount of heat medium in the heat medium storage tank, the heat to the heat medium storage tank is reduced when the amount of heat medium in the heat medium storage tank falls below a set lower limit amount. A heating medium that starts supplying the heating medium and replenishes the heating medium in such a form that the supply of the heating medium to the heating medium storage tank is terminated when the amount of the heating medium in the heating medium storage tank exceeds a set upper limit amount. Replenishment means;
A heating medium supply device provided with an operation control means for controlling operation,
When the amount of heat medium in the heat medium storage tank reaches the set lower limit amount, the operation control means determines the amount of heat medium in the heat medium storage tank based on the detection information of the heat medium amount detection means. By determining that the decrease satisfies the condition for determining leakage, it is configured to determine that a heat medium leak has occurred, and until the heat medium circulation supply to the heat medium supply terminal ends and restarts In the period from the start of the circulating supply of the heat medium to the heat medium supply terminal until the set time for the initial supply period elapses, the heat medium supply stop time is equal to or longer than the long-term supply stop determination set time. Even if the decrease in the amount of the heat medium in the heat medium storage tank that occurs when the circulation of the heat medium to the heat medium supply terminal is started satisfies the leak determination condition, the leak determination condition is not satisfied. Heat medium supply device configured to determine The apparatus side formed so as to span the heat medium return part from the heat medium supply terminal and the heat medium supply part to the heat medium supply terminal in a form passing through the heat medium heating part and the open air type heat medium storage tank A heating medium circuit,
A heat medium circulation pump that is equipped in the apparatus side heat medium circulation path and circulates the heat medium;
Based on the detection information of the heat medium amount detecting means for detecting the amount of heat medium in the heat medium storage tank, the heat to the heat medium storage tank is reduced when the amount of heat medium in the heat medium storage tank falls below a set lower limit amount. A heating medium that starts supplying the heating medium and replenishes the heating medium in such a form that the supply of the heating medium to the heating medium storage tank is terminated when the amount of the heating medium in the heating medium storage tank exceeds a set upper limit amount. Replenishment means;
A heating medium supply device provided with an operation control means for controlling operation,
When the amount of heat medium in the heat medium storage tank reaches the set lower limit amount, the operation control means determines the amount of heat medium in the heat medium storage tank based on the detection information of the heat medium amount detection means. It is configured to determine that the heat medium leakage has occurred when the number of times that the reduction satisfies the leakage determination condition reaches the determination setting number within the determination setting time, and to the heat medium supply terminal The heating medium supply stop time from the end of the circulation supply of the heating medium to the restart is equal to or longer than the set time for long-term supply stop determination, and the initial supply after starting the circulation supply of the heating medium to the heating medium supply terminal Within the period until the set time for the period elapses, a decrease in the amount of the heat medium in the heat medium storage tank that occurs when the heat medium circulation supply to the heat medium supply terminal is started is used for the leakage determination. Even if the conditions are satisfied, the conditions for determining the leakage are satisfied. The Most judgment, the heating medium heating medium supply apparatus decreases the heating medium amount is configured not added to the number of times determined as the leakage determination condition is satisfied in the storage tank. Each of the plurality of heat medium supply terminals connected in a state where the operation control means is in parallel between the heat medium supply unit and the heat medium return unit and the circulation supply of the heat medium is interrupted separately. The amount of the heat medium in the heat medium storage tank is reduced when the heat medium circulation supply state is managed and the heat medium circulation supply is started to any of the plurality of heat medium supply terminals. 3. The heating medium supply device according to claim 1, wherein the heat medium supply device is configured to determine that the leakage determination condition is not satisfied even if the leakage determination condition is satisfied. The heat medium supply device according to any one of claims 1 to 3, wherein the leakage determination condition is a condition in which a heat medium amount in the heat medium storage tank reaches the set lower limit amount. The leak determination condition is a condition for reaching the set lower limit amount within a set time for monitoring the amount of heat medium decrease after the amount of the heat medium in the heat medium storage tank reaches the set upper limit amount. The heating medium supply device according to any one of the above.

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