Heat source unit connection system

Abstract

To provide a technique capable of suppressing the occurrence of deviation in use frequency in heating operation and hot water supply operation in each of a plurality of heat source machines.SOLUTION: A heat source machine connection system disclosed in the present specification includes a heat medium circulation path including a heat medium outgoing pipe and a heat medium return pipe, a hot water flow path including a water supply pipe and a hot water delivery pipe, a plurality of heat source machines connected in parallel to the heat medium circulation path and the hot water flow path, and a connection control device capable of communicating with each of the plurality of heat source machines. Each of the plurality of heat source machines is configured to be capable of executing a heating operation in which the heat medium supplied from the heat medium return pipe is heated and supplied to the heat medium outgoing pipe, and a hot water supply operation in which the water supplied from the water supply pipe is heated and supplied to the hot water delivery pipe.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a heat source machine connection system. [Background technology]

[0002] Patent Document 1 discloses a heat source machine connection system. The heat source machine connection system includes a heat medium circulation path including a heat medium supply pipe and a heat medium return pipe, a hot water flow path including a water supply pipe and a hot water outlet pipe, a plurality of heat source machines connected in parallel to the heat medium circulation path and the hot water flow path, and a connection control device capable of communicating with each of the plurality of heat source machines. Each of the plurality of heat source machines is configured to be capable of performing a heating operation in which a heat medium supplied from the heat medium return pipe is heated and supplied to the heat medium supply pipe, and a hot water supply operation in which water supplied from the water supply pipe is heated and supplied to the hot water outlet pipe. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-125690 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described heat source unit interconnection system, it is typically determined whether each of the multiple heat source units should perform heating operation, hot water supply operation, or standby without performing either heating or hot water supply operation, depending on the heat load required for heating or hot water supply. However, in the above-described heat source unit interconnection system, depending on the usage situation, the frequency of use of heating operation or hot water supply operation may be uneven among some of the multiple heat source units, which may cause some heat source units to deteriorate more rapidly than the other heat source units. This specification provides technology that can suppress uneven use of heating operation or hot water supply operation among the multiple heat source units. [Means for solving the problem]

[0005] A first aspect of the heat source unit connection system disclosed in this specification may include a heat medium circulation path including a heat medium supply pipe and a heat medium return pipe, a hot water flow path including a water supply pipe and a hot water outlet pipe, multiple heat source units connected in parallel to the heat medium circulation path and the hot water flow path, and a connection control device capable of communicating with each of the multiple heat source units. Each of the multiple heat source units may be configured to perform a heating operation in which a heat medium supplied from the heat medium return pipe is heated and supplied to the heat medium supply pipe, and a hot water supply operation in which water supplied from the water supply pipe is heated and supplied to the hot water outlet pipe. The connection control device may instruct each of the multiple heat source units to start or stop a hot water supply operation based on the priority of the hot water supply operation of each of the multiple heat source units, and the connection control device may instruct each of the multiple heat source units to start or stop a heating operation based on the priority of the heating operation of each of the multiple heat source units, and the priority of the hot water supply operation of each of the multiple heat source units may be at least partially different from the priority of the heating operation of each of the multiple heat source units.

[0006] If the priority for hot water supply operation of each of the multiple heat source machines and the priority for heating operation of each of the multiple heat source machines were the same, a heat source machine that is used more frequently in hot water supply operation would also be used more frequently in heating operation, which could lead to a bias in the frequency of use of the heat source machines.With the above configuration, the priority for hot water supply operation of each of the multiple heat source machines and the priority for heating operation of each of the multiple heat source machines are at least partially different, making it possible to suppress a bias in the frequency of use of the heat source machines.

[0007] In a second aspect, in the heat source machine linked system of the first aspect, the plurality of heat source machines may include a first heat source machine and a second heat source machine. When the priority of the first heat source machine for hot water supply operation is higher than the priority of the second heat source machine for hot water supply operation, the priority of the first heat source machine for heating operation may be lower than the priority of the second heat source machine for heating operation, and when the priority of the first heat source machine for hot water supply operation is lower than the priority of the second heat source machine for hot water supply operation, the priority of the first heat source machine for heating operation may be higher than the priority of the second heat source machine for heating operation.

[0008] According to the above configuration, a heat source unit that has a high priority for hot water supply operation and therefore is used frequently in hot water supply operation will have a low priority for heating operation and therefore is used less frequently in heating operation. Conversely, a heat source unit that has a high priority for heating operation and therefore is used frequently in heating operation will have a low priority for hot water supply operation and therefore is used less frequently in hot water supply operation. By adopting such a configuration, it is possible to prevent bias in the frequency of use of heat source units.

[0009] In a third aspect, in the heat source machine connected system of the first or second aspect, among the multiple heat source machines, the higher the priority of the heat source machine with respect to the hot water supply operation, the lower the priority of the heat source machine with respect to the heating operation, and the lower the priority of the heat source machine with respect to the hot water supply operation, the higher the priority of the heat source machine with respect to the heating operation.

[0010] According to the above configuration, the higher the priority for hot water supply operation of a heat source unit, and therefore the more frequently it is used in hot water supply operation, the lower the priority for heating operation, and therefore the less frequently it is used in heating operation. Conversely, the higher the priority for heating operation of a heat source unit, and therefore the more frequently it is used in heating operation, the lower the priority for hot water supply operation, and therefore the less frequently it is used in hot water supply operation. By adopting such a configuration, it is possible to prevent bias in the frequency of use of heat source units.

[0011] In a fourth aspect, in the heat source machine connection system of any one of the first to third aspects above, the connection control device may be configured to perform a rotation of priorities for hot water supply operation of each of the plurality of heat source machines when a predetermined rotation condition is satisfied, and at the same time to perform a rotation of priorities for heating operation of each of the plurality of heat source machines.

[0012] According to the above configuration, the processing performed by the connection control device can be simplified compared to when the rotation of priorities for hot water supply operation and the rotation of priorities for heating operation are performed based on mutually different conditions.

[0013] In a fifth aspect, in the heat source machine linked system of the fourth aspect, the rotation condition may be based on the number of times hot water supply is used in the heat source machine linked system.

[0014] If the heat source unit-connected system is repeatedly used to supply hot water without rotating the priority for hot water operation, the heat source unit with a higher priority for hot water operation will continue to be used more frequently. According to the above configuration, the priority for hot water operation is rotated based on the number of times the heat source unit-connected system is used to supply hot water, thereby preventing bias in the frequency of use of the heat source units.

[0015] In a sixth aspect, in the heat source machine linked system of the fourth aspect, the rotation condition may be based on a hot water supply usage time of the heat source machine linked system.

[0016] If the heat source unit connected system is used to supply hot water for a long period of time without rotating the priority for hot water supply operation, the heat source unit with a high priority for hot water supply operation will continue to be used more frequently. With the above configuration, the priority for hot water supply operation is rotated based on the hot water use time of the heat source unit connected system, so that it is possible to prevent bias in the frequency of use of the heat source units.

[0017] In a seventh aspect, in a heat source machine connection system of any one of the first to sixth aspects above, the connection control device may determine the priority of each of the multiple heat source machines regarding hot water supply operation after the rotation is performed based only on the priority of each of the multiple heat source machines regarding hot water supply operation before the rotation is performed.

[0018] According to the above configuration, the processing performed by the connection control device for rotating the priority for hot water supply operation can be simplified compared to when the priority is determined based on something other than the priority for hot water supply operation before the rotation is performed. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a diagram showing the configuration of a heat source machine linking system 1 of an embodiment. [Figure 2] FIG. 10 is a diagram showing how the execution or stop of hot water supply operation and heating operation of each of the heat source units 100, 200, 300, 400, 500, and 600 is switched in the heat source unit linked system 1 of the embodiment. [Figure 3] FIG. 10 is a diagram showing a state when priorities for hot water supply operation and heating operation are rotated in the heat source units 100, 200, 300, 400, 500, and 600 of the heat source unit linked system 1 of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] (Example) As shown in Fig. 1, the heat source unit interconnection system 1 according to the embodiment includes a heat medium circulation path 30, a hot and cold water flow path 34, six heat source units 100, 200, 300, 400, 500, and 600, and a water mixer 20. The heat medium circulation path 30 includes a heat medium return pipe 31 and a heat medium forward pipe 33, and the hot and cold water flow path 34 includes a water supply pipe 35 and a hot water outlet pipe 36. The heat source units 100, 200, 300, 400, 500, and 600 are connected in parallel to the heat medium circulation path 30 and the hot and cold water flow path 34. A flow rate sensor 40 capable of detecting the flow rate of water flowing through the water supply pipe 35 is installed in the water supply pipe 35. When heating is performed using the heat source machine linked system 1, the heat medium for heating (e.g., water or antifreeze) flows from the water mixer 20 through the heat medium return pipe 31 into at least one of the heat source machines 100, 200, 300, 400, 500, and 600, where it is heated to a high temperature and then flows into the water mixer 20 through the heat medium forward pipe 33. The heat medium for heating also flows from the water mixer 20 through the heating terminal forward pipe 43 into the heating terminal (not shown), where it is used for heating and then flows into the water mixer 20 through the heating terminal return pipe 41 and then flows into the water mixer 20. When hot water is supplied using the heat source machine linked system 1, the water for hot water supply flows from the water supply pipe 35 into at least one of the heat source machines 100, 200, 300, 400, 500, and 600, where it is heated to a high temperature and then flows out into the hot water outlet pipe 36.

[0021] The heat source device 100 includes a burner 101, a controller 102, a first heat exchanger 103 that heats a heat medium by the combustion heat of the burner 101, a heat medium return branch pipe 121 that branches off from the heat medium return pipe 31 and connects to the fluid inlet of the first heat exchanger 103, a heat medium forward branch pipe 123 that connects from the fluid outlet of the first heat exchanger 103 to the heat medium forward pipe 33, a pump 107 provided on the heat medium return branch pipe 121, and a pump 107 that connects the heat medium forward branch pipe 123 to a portion of the heat medium return branch pipe 121 upstream of the pump 107. The system includes a bypass pipe 109, a three-way valve 111 provided at the connection point between the heat medium forward branch pipe 123 and the bypass pipe 109 and switching the destination of the heat medium flowing out of the first heat exchanger 103 between the bypass pipe 109 and the heat medium forward pipe 33, a second heat exchanger 130 provided in the bypass pipe 109, a hot water heating circuit 125 that supplies water from the water supply pipe 35 to the hot water outlet pipe 36 via the second heat exchanger 130, and an on-off valve 115 that starts and stops the flow of water flowing through the hot water heating circuit 125. The second heat exchanger 130 heats the water flowing through the hot water heating circuit 125 by exchanging heat with the heat medium flowing through the bypass pipe 109.

[0022] The controller 102 includes a CPU, ROM, RAM, etc., and controls the operation of the burner 101, pump 107, three-way valve 111, and on-off valve 115 of the heat source apparatus 100. When the heat source apparatus 100 performs heating operation, the controller 102 controls the three-way valve 111 to drive the pump 107 so that the destination of the heat medium flowing out of the first heat exchanger 103 is the heat medium forward pipe 33. As a result, the heat medium flows from the heat medium return pipe 31 through the heat medium return branch pipe 121 and into the first heat exchanger 103. The heat medium flowing out of the first heat exchanger 103 passes through the heat medium forward branch pipe 123 and flows into the heat medium forward pipe 33. The controller 102 then combusts the burner 101. As a result, the heat medium passing through the first heat exchanger 103 is heated, and the heated heat medium can be supplied to the heat medium forward pipe 33.

[0023] When the heat source apparatus 100 performs hot water supply operation, the controller 102 controls the three-way valve 111 so that the destination of the heat medium flowing out of the first heat exchanger 103 is the bypass pipe 109, and drives the pump 107. As a result, the heat medium circulates between the first heat exchanger 103 and the second heat exchanger 130. Then, the controller 102 opens the on-off valve 115 and activates the burner 101. As a result, the heat medium passing through the first heat exchanger 103 is heated, and the heated heat medium can be supplied to the second heat exchanger 130. As a result, the water flowing through the hot water heating circuit 125 is heated, and heated water can be supplied to the hot water outlet pipe 36.

[0024] Since heat source units 200, 300, 400, 500, and 600 all have the same configuration as heat source unit 100, the explanation of the configurations of heat source units 200, 300, 400, 500, and 600 will be omitted by replacing the reference numbers in the 100 series of each configuration of heat source unit 100 with numbers in the 200 series, 300 series, 400 series, 500 series, and 600 series, respectively.

[0025] In the heat source machine linked system 1, the controllers 102, 202, 302, 402, 502, and 602 can communicate with each other. In the heat source machine linked system 1, one of the controllers 102, 202, 302, 402, 502, and 602 (for example, controller 102) functions as a parent machine that manages the overall operation of the heat source machine linked system 1, and the remaining controllers function as child machines that operate according to instructions from the parent machine. Based on the amount of heat required for hot water supply and / or space heating, controller 102 functioning as a parent machine determines for each of the heat source machines 100, 200, 300, 400, 500, and 600 whether to perform heating operation, hot water supply operation, or to put each of the heat source machines 100, 200, 300, 400, 500, and 600 on standby without performing either heating or hot water supply operation. The controllers 202, 302, 402, 502, and 602 functioning as slave units cause the heat source units 200, 300, 400, 500, and 600 to perform heating operation, perform hot water supply operation, or wait without performing either heating or hot water supply operation, in accordance with instructions from the controller 102 functioning as the master unit. Note that the controller 102 functioning as the master unit causes the heat source unit 100 to perform heating operation, perform hot water supply operation, or wait without performing either heating operation or hot water supply operation, in accordance with its own instructions.

[0026] As shown in Fig. 2, priorities for hot water supply operation and priorities for heating operation are assigned in advance to the heat source units 100, 200, 300, 400, 500, and 600. In the example shown in Fig. 2, priorities for hot water supply operation and priorities for heating operation are assigned so that the higher the priority of the heat source unit for hot water supply operation, the lower the priority of the heating operation, and the lower the priority of the heat source unit for hot water supply operation, the higher the priority of the heating operation.

[0027] As shown in (A) of Fig. 2, in the heat source unit linked system 1, when hot water supply or heating is started, the controller 102 functioning as the parent unit causes the heat source unit 100, which has the highest priority for hot water supply operation, to start hot water supply operation, and the heat source unit 600, which has the highest priority for heating operation, to start heating operation. Thereafter, when the amount of heat required for hot water supply or heating increases, as shown in (B) of Fig. 2, the controller 102 causes the heat source unit 200, which has the next highest priority for hot water supply operation, to start hot water supply operation, and the heat source unit 500, which has the next highest priority for heating operation, to start heating operation. Then, when the amount of heat required for hot water supply or heating further increases, as shown in (C) of Fig. 2, the controller 102 causes the heat source unit 300, which has the next highest priority for hot water supply operation, to start hot water supply operation, and the heat source unit 400, which has the next highest priority for heating operation, to start heating operation. In this embodiment, as shown in (C) of Fig. 2, when all of the heat source units 100, 200, 300, 400, 500, and 600 are performing hot water supply operation or heating operation and the amount of heat required for hot water supply further increases, the heat source unit 400, which has the next highest priority for hot water supply operation, is made to end heating operation and start hot water supply operation, as shown in (D) of Fig. 2. In this way, the heat source unit linked system 1 in this embodiment is configured to give priority to hot water supply operation when requests for hot water supply operation and heating operation overlap.

[0028] A method for rotating the priorities of hot water supply operation and heating operation of the heat source units 100, 200, 300, 400, 500, and 600 of this embodiment will be described with reference to Fig. 3. In the heat source unit linked system 1 of this embodiment, the priorities of hot water supply operation and heating operation are rotated when the hot water usage time of the heat source unit linked system 1 reaches a predetermined time (for example, 24 hours). As shown in Fig. 3(A), for example, in the heat source unit linked system 1, the heat source units 100, 200, and 300, which have a high priority for hot water supply operation, are performing hot water supply operation, and the heat source unit 600, which has a high priority for heating operation, is performing heating operation. Thereafter, when the hot water usage time of the heat source unit linked system 1 reaches a predetermined time, the controller 102 functioning as the parent unit rotates the priority of the hot water operation and heating operation of the heat source units 100, 200, 300, 400, 500, and 600, and as shown in Fig. 3(B), sets the priority of the hot water operation of the heat source unit 600, which had previously had the lowest priority of hot water operation, to the highest, number 1, and lowers the priority of the hot water operation of the other heat source units 100, 200, 300, 400, and 500 by one position. In addition, the controller 102 functioning as the parent unit sets the priority of the heating operation of the heat source unit 600, which has now had the highest priority of hot water operation, to the lowest, number 6, and raises the priority of the heating operation of the other heat source units 100, 200, 300, 400, and 500 by one position. As a result of this rotation, the controller 102, which functions as the parent unit, causes the heat source units 100 and 200 to continue hot water supply operation, causes the heat source unit 300 to end hot water supply operation and wait, causes the heat source unit 500 to start heating operation, and causes the heat source unit 600 to end heating operation and start hot water supply operation.

[0029] Thereafter, when the hot water usage time of the heat source unit linked system 1 reaches a predetermined time, the controller 102 functioning as the parent unit rotates the priority of the hot water operation and heating operation of the heat source units 100, 200, 300, 400, 500, and 600, and as shown in Fig. 3(C), sets the priority of the hot water operation of the heat source unit 500, which had previously had the lowest priority of hot water operation, to the highest, number 1, and lowers the priority of the hot water operation of the other heat source units 100, 200, 300, 400, and 600 by one position. In addition, the controller 102 functioning as the parent unit sets the priority of the heating operation of the heat source unit 500, which has now had the highest priority of hot water operation, to the lowest, number 6, and raises the priority of the heating operation of the other heat source units 100, 200, 300, 400, and 600 by one position. As a result of this rotation, the controller 102 functioning as the parent unit causes the heat source units 100 and 600 to continue hot water supply operation, causes the heat source unit 200 to end hot water supply operation and put it into standby, causes the heat source unit 400 to start heating operation, and causes the heat source unit 500 to end heating operation and start hot water supply operation. After that, when the hot water usage time of the heat source unit linked system 1 reaches a predetermined time, the controller 102 functioning as the parent unit rotates the priority of the hot water supply operation and heating operation of the heat source units 100, 200, 300, 400, 500, and 600, and sets the priority of the hot water supply operation of the heat source unit 400, which had previously had the lowest priority of hot water supply operation, to the highest, first, as shown in Figure 3 (D), and lowers the priority of the hot water supply operation of the other heat source units 100, 200, 300, 500, and 600 by one. Furthermore, the controller 102 functioning as the parent unit sets the priority of heating operation of the heat source unit 400, which has the highest priority of hot water supply operation, to the lowest, number 6, and moves up the priority of heating operation of the remaining heat source units 100, 200, 300, 500, and 600 by one. As a result of this rotation, the controller 102 functioning as the parent unit causes the heat source units 500 and 600 to continue hot water supply operation, causes the heat source unit 100 to end hot water supply operation and enter standby mode, causes the heat source unit 300 to start heating operation, and causes the heat source unit 400 to end heating operation and start hot water supply operation. The heat source unit linked system 1 in this embodiment rotates the priority of hot water supply operation and heating operation of the heat source units 100, 200, 300, 400, 500, and 600 using the same procedure as described above.

[0030] (Variation) The heat source machine linked system 1 may use the number of times that the heat source machine linked system 1 has used hot water a predetermined number of times (for example, 10 times) as a condition for rotating the priority of hot water operation and heating operation, instead of the time that the heat source machine linked system 1 has used hot water for a predetermined time. Alternatively, the heat source machine linked system 1 may use the time that the heat source machine linked system 1 has used heating for a predetermined time (for example, 24 hours) or the number of times that the heat source machine linked system 1 has used heating for a predetermined number of times (for example, 10 times) as a condition for rotating the priority of hot water operation and heating operation.

[0031] The heat source machine linkage system 1 may be configured to give priority to the heating operation when requests for hot water supply operation and heating operation overlap.

[0032] The heat source machine linking system 1 may use the same conditions for the rotation of priority for hot water supply operation and the rotation of priority for heating operation, but may not execute them simultaneously but at different times.

[0033] The heat source machine linking system 1 may separately perform the rotation of the priority order for the hot water supply operation and the rotation of the priority order for the heating operation using different conditions.

[0034] The heat source unit linking system 1 may include a controller that functions as a parent unit, separate from the heat source units 100, 200, 300, 400, 500, and 600.

[0035] The heat source machines 100, 200, 300, 400, 500, and 600 may be provided with a burner for heating water during hot water supply operation, separate from the burners 101, 201, 301, 401, 501, and 601 for heating the heat medium during heating operation. In this case, the heat source machines 100, 200, 300, 400, 500, and 600 may be capable of simultaneously performing hot water supply operation and heating operation.

[0036] The heat source machine connection system 1 may not install a flow sensor 40 in the water supply pipe 35, but may install a flow sensor separately in each of the hot water heating circuits 125, 225, 325, 425, 525, and 625 of the heat source machines 100, 200, 300, 400, 500, and 600, and calculate the flow rate of water flowing through the water supply pipe 35 by summing the flow rates of each flow sensor.

[0037] The three-way valves 111, 211, 311, 411, 511, 611 of the heat source units 100, 200, 300, 400, 500, 600 may be provided at the connection points of the heat medium return branch pipes 121, 221, 321, 421, 521, 621 and the bypass pipes 109, 209, 309, 409, 509, 609.

[0038] (Correspondence) The controller 102 functioning as the parent device is an example of a "connection control device."

[0039] The technical elements described in this specification or drawings exhibit technical utility either alone or in various combinations, and are not limited to the combinations set forth in the claims at the time of filing. Furthermore, the technologies illustrated in this specification or drawings can achieve multiple objectives simultaneously, and achieving one of these objectives is itself technically useful. [Explanation of symbols]

[0040] 1: Heat source machine connection system 20: Water mixer 30: Heat medium circulation path 31: Heat medium return pipe 33: Heat transfer pipe 34: Hot water flow passage 35: Water supply pipe 36: Outlet pipe 40: Flow sensor 41: Heating terminal return pipe 43: Heating terminal outgoing pipe 100, 200, 300, 400, 500, 600: Heat source machine 101, 201, 301, 401, 501, 601: Burner 102, 202, 302, 402, 502, 602: Controller 103, 203, 303, 403, 503, 603: 1st heat exchanger 107, 207, 307, 407, 507, 607: Pumps 109, 209, 309, 409, 509, 609: Bypass pipes 111, 211, 311, 411, 511, 611: Three-way valve 115, 215, 315, 415, 515, 615: On-off valve 121, 221, 321, 421, 521, 621: Heat medium return branch pipe 123, 223, 323, 423, 523, 623: Heat transfer branch pipe 125, 225, 325, 425, 525, 625: Hot water heating circuit 130, 230, 330, 430, 530, 630: 2nd heat exchanger

Claims

1. a heat medium circulation path including a heat medium supply pipe and a heat medium return pipe; a hot water flow passage including a water supply pipe and a hot water outlet pipe; A plurality of heat source units connected in parallel to the heat medium circulation path and the hot water flow path; A connection control device capable of communicating with each of the plurality of heat source machines; Equipped with Each of the plurality of heat source machines is a heating operation in which the heat medium supplied from the heat medium return pipe is heated and supplied to the heat medium supply pipe; a hot water supply operation in which water supplied from the water supply pipe is heated and supplied to the hot water outlet pipe; the connection control device instructs each of the plurality of heat source machines to start or stop a hot water supply operation based on a priority order for the hot water supply operation of each of the plurality of heat source machines; the connection control device instructs each of the plurality of heat source machines to start or stop heating operation based on the priority of the heating operation of each of the plurality of heat source machines; The priority of each of the plurality of heat source machines regarding the hot water supply operation and the priority of each of the plurality of heat source machines regarding the heating operation are at least partially different. Heat source machine connection system.

2. The plurality of heat source machines include a first heat source machine and a second heat source machine, When the priority of the first heat source machine regarding the hot water supply operation is higher than the priority of the second heat source machine regarding the hot water supply operation, the priority of the first heat source machine regarding the heating operation is lower than the priority of the second heat source machine regarding the heating operation, when the priority of the first heat source machine regarding the hot water supply operation is lower than the priority of the second heat source machine regarding the hot water supply operation, the priority of the first heat source machine regarding the heating operation is higher than the priority of the second heat source machine regarding the heating operation; The heat source machine connecting system according to claim 1 .

3. Among the plurality of heat source machines, a heat source machine with a higher priority for the hot water supply operation has a lower priority for the heating operation, and a heat source machine with a lower priority for the hot water supply operation has a higher priority for the heating operation. The heat source machine connecting system according to claim 1 .

4. the connection control device is configured to, when a predetermined rotation condition is satisfied, execute a rotation of the priority of the hot water supply operation of each of the plurality of heat source machines, and simultaneously execute a rotation of the priority of the heating operation of each of the plurality of heat source machines. The heat source machine connecting system according to claim 1 .

5. The rotation condition is based on the number of times hot water is supplied to the heat source machine connected system, The heat source machine connecting system according to claim 4.

6. The rotation conditions are based on the hot water supply usage time of the heat source machine connected system, The heat source machine connecting system according to claim 4.

7. the connection control device determines the priority of the hot water supply operation of each of the plurality of heat source machines after the rotation is performed based only on the priority of the hot water supply operation of each of the plurality of heat source machines before the rotation is performed. The heat source machine connecting system according to claim 4.

Images