JP6143614B2 - Thermal equipment - Google Patents

Description

  The present invention relates to a thermal apparatus.

  In Patent Literature 1, a heat exchanger (heat exchanger 12 for hot water supply) that heats the heat medium, a heat medium inflow path (inflow side pipe 12B) that communicates with one end of the heat exchanger, and the other end of the heat exchanger A first unit (heat pump unit) having a heat medium outflow path (outflow side pipe 12C) that communicates, a circulation pump (circulation pump 23) that circulates the heat medium, and a heat medium delivery path that communicates with one end of the circulation pump ( A bottom pipe 22), a second unit (tank unit) including a heat medium receiving path (upper circulation pipe 24) communicating with the other end of the circulation pump, a heat medium inflow path, and a heat medium delivery path; A pair of connecting pipes (incoming water side connecting pipe 25, outgoing hot water side connecting pipe 26) between the first unit and the second unit, which connect the heat medium outflow path and the heat medium receiving path, and a controller (incorrect connection determination means). 47) Opened thermal equipment (heat pump water heater) It is. In this thermal apparatus, the first unit includes a heating medium inflow path thermistor (temperature sensor 20D) provided in the heating medium inflow path and a heating medium outflow path thermistor (temperature sensor 20E) provided in the heating medium outflow path. It has more. In this thermal apparatus, when the heating medium is circulated between the first unit and the second unit for heating, the detected temperature of the heating medium inflow path thermistor is higher than the detected temperature of the heating medium outflow path thermistor over a predetermined time. The controller determines that the pair of connecting pipes between the first unit and the second unit are erroneously connected.

JP 2005-147616 A

  In a thermal apparatus in which a third unit is interposed between a first unit and a second unit, and a heating medium is circulated between the first unit and the second unit via the third unit for heating. Cannot apply the technique of patent document 1 as it is. In the thermal apparatus in which the third unit is interposed between the first unit and the second unit, a pair of connecting pipes exist between the first unit and the third unit, and the second unit There is also a pair of connecting pipes between the third units. In the thermal equipment having such a configuration, a technique capable of accurately detecting an erroneous connection of each connection pipe is expected.

  The present specification provides a technique for solving the above problems. In this specification, in a thermal apparatus in which a third unit is interposed between a first unit that includes a heat exchanger and a second unit that includes a circulation pump, an erroneous connection of a connection pipe is detected. Provide technology that can.

  The heat device disclosed in the present specification includes a heat exchanger that heats the heat medium, a heat medium inflow passage that communicates with one end of the heat exchanger, and a heat medium outflow passage that communicates with the other end of the heat exchanger. A first unit, a circulation pump that circulates the heat medium, a heat medium delivery path that communicates with one end of the circulation pump, a second unit that includes a heat medium reception path that communicates with the other end of the circulation pump, A third unit that is disposed between the unit and the second unit, and that connects the third unit including the relay forward path and the relay return path, the heat medium inflow path and the relay forward path, and connects the heat medium outflow path and the relay return path; Between the second unit and the third unit, a pair of connecting pipes between the unit 1 and the third unit, the heating medium delivery path and the relay forward path are connected, and the heating medium reception path and the relay return path are connected. A pair of connecting pipes and a controller are provided. In the thermal apparatus, the third unit further includes a relay forward thermistor provided in the relay forward path and a relay backward thermistor provided in the relay backward path. In the thermal device, when the heating medium is circulated and heated between the first unit and the second unit via the third unit, the temperature detected by the relay forward path thermistor is the relay return path over a first predetermined time. When the temperature is higher than the detected temperature of the thermistor by a first predetermined temperature or more, the controller determines that the pair of connecting pipes between the second unit and the third unit are erroneously connected.

  In the above thermal apparatus, when a pair of connecting pipes between the second unit and the third unit are normally connected, a pair of connecting pipes between the first unit and the third unit Regardless of whether the connection is correct or incorrect, the heat medium sent from the second unit to the third unit by driving the circulation pump (that is, the low-temperature heat medium before being heated by the heat exchanger) flows through the relay forward path, The heating medium returned from the unit to the second unit (that is, the high-temperature heating medium after being heated by the heat exchanger) flows through the relay return path. Therefore, when the pair of connecting pipes between the second unit and the third unit are normally connected, the temperature detected by the relay return thermistor is higher than the temperature detected by the relay forward thermistor. It should be. Focusing on this relationship, in the above-described thermal device, when the detected temperature of the relay forward path thermistor is higher than the detected temperature of the relay backward path thermistor over the first predetermined time by the second predetermined temperature, the controller It is determined that there is a misconnection in the pair of connecting pipes between the unit and the third unit. According to said thermal apparatus, the misconnection of a pair of connection piping between a 2nd unit and a 3rd unit is detectable.

  In the above thermal apparatus, the first unit further includes a heat medium inflow path thermistor provided in the heat medium inflow path, and a heat medium outflow path thermistor provided in the heat medium outflow path, and the third unit A pair of connecting pipes between the second unit and the third unit are correctly connected when the heating medium is circulated and heated between the first unit and the second unit via When the detected temperature of the heat medium inflow path thermistor is higher than the detected temperature of the heat medium outflow path thermistor over the second predetermined time by a second predetermined temperature or more, the controller is connected between the first unit and the third unit. The pair of connecting pipes can be determined to be erroneously connected.

  In the above thermal apparatus, the pair of connecting pipes between the second unit and the third unit are normally connected, and the pair of connecting pipes between the first unit and the third unit are also normally connected. In this case, the heat medium sent from the third unit to the first unit by driving the circulation pump (that is, the low-temperature heat medium before heating by the heat exchanger) flows through the heat medium inflow path, The heating medium returned from the unit to the third unit (that is, the high-temperature heating medium after being heated by the heat exchanger) flows through the heating medium outflow path. Therefore, when a pair of connecting pipes between the second unit and the third unit are normally connected, and a pair of connecting pipes between the first unit and the third unit are also connected normally. The temperature detected by the heat medium outflow path thermistor should be higher than the temperature detected by the heat medium inflow path thermistor. Focusing on this relationship, in the above-described thermal device, the pair of connecting pipes between the second unit and the third unit are correctly connected, and the detection of the heat medium inflow path thermistor over the second predetermined time is performed. When the temperature is higher than the detected temperature of the heat medium outflow path thermistor by a second predetermined temperature or more, the controller determines that there is a misconnection in the pair of connecting pipes between the first unit and the third unit. To do. According to said thermal apparatus, the misconnection of a pair of connection piping between a 1st unit and a 3rd unit is detectable.

  In the above thermal apparatus, the third unit further includes a bypass path that connects the relay forward path and the relay return path, and a bypass valve that opens and closes the bypass path, and the first unit and the first unit are connected via the third unit. When heating by circulating the heat medium between the two units, the pair of connecting pipes between the second unit and the third unit are erroneously connected while the bypass path is closed by the bypass valve. The controller can be configured to determine that the pair of connecting pipes between the second unit and the third unit are correctly connected when it is not determined that they are connected.

  In the above thermal equipment, when the bypass path is open, even if there is an erroneous connection in the pair of connecting pipes between the second unit and the third unit, the temperature detected by the relay return path thermistor The temperature difference detected by the relay forward thermistor is reduced. For this reason, there is a possibility that the controller cannot detect an erroneous connection. Therefore, in the above thermal equipment, in a state where the bypass path is closed by the bypass valve, when it is not determined that the pair of connection pipes between the second unit and the third unit are erroneously connected, The controller determines that the pair of connecting pipes between the second unit and the third unit are correctly connected. According to said thermal apparatus, the misconnection of a pair of connection piping between a 2nd unit and a 3rd unit can be detected correctly.

It is a figure explaining the structure of the hot water supply and heating system 2 of an Example, and is a figure explaining the structure of the HP unit 10 and the hot water storage unit 20 especially. It is a figure explaining the structure of the hot-water supply heating system 2 of an Example, and is a figure explaining the structure of the gas heat source unit 50 especially. It is a flowchart explaining the detection process of the piping incorrect connection in the hot water supply heating system 2 of an Example.

(Example)
A hot water supply / heating system 2 according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the hot water supply / heating system 2 mainly includes an HP (heat pump) unit 10, a hot water storage unit 20, and a gas heat source unit 50.

  As shown in FIG. 1, the HP unit 10 includes a heat pump 11. The heat pump 11 includes a compressor 12, a three-fluid heat exchanger 13, an expansion valve 14, an air heat exchanger 15, a fan 15a, and a defrost valve 17. In the heat pump 11, a refrigerant (for example, a CO 2 refrigerant such as R744 or an HFC refrigerant such as R410A) circulates in the order of the compressor 12, the three-fluid heat exchanger 13, the expansion valve 14, and the air heat exchanger 15. The compressor 12 pressurizes the refrigerant to a high temperature and high pressure state. In the three-fluid heat exchanger 13, between the refrigerant flowing through the refrigerant flow path 13a and the hot water supply water flowing through the hot water supply water flow path 13b, or between the refrigerant flowing through the refrigerant flow path 13a and the heating water flowing through the heating water flow path 13c. The refrigerant is cooled by heat exchange. In the expansion valve 14, the refrigerant is decompressed to a low temperature and low pressure state. In the air heat exchanger 15, the refrigerant is heated by heat exchange between the refrigerant flowing inside and the outside air blown by the fan 15a. The defrost valve 17 is normally closed, and is opened when the defrost operation for defrosting the air heat exchanger 15 is performed. When the compressor 12 is driven in a state where the defrost valve 17 is opened, warm refrigerant that has not passed through the expansion valve 14 flows through the air heat exchanger 15, and frost attached to the outer surface of the air heat exchanger 15 is removed. .

  A hot water supply water inflow passage 19 a and a hot water supply water outflow passage 19 b are connected to the hot water supply water passage 13 b of the three-fluid heat exchanger 13. A hot water supply water circulation pump 18 is attached to the hot water supply water inflow passage 19a. A heating water inflow passage 19c and a heating water outflow passage 19d are connected to the heating water passage 13c of the three-fluid heat exchanger 13. A heating inflow thermistor 16a is attached to the heating water inflow passage 19c. A heating outflow thermistor 16b is attached to the heating water outflow path 19d.

  The hot water storage unit 20 includes a hot water storage tank 21. The hot water storage tank 21 is a sealed container that stores tap water (hereinafter also referred to as hot water supply water). The capacity of the hot water tank 21 is, for example, 100 liters. The hot water tank 21 includes a tank internal thermistor 39a that directly detects the water temperature in the vicinity of the top, and a tank that detects the water temperature at a predetermined capacity from the upper end of the hot water tank 21 (for example, 10 liters, 30 liters, and 50 liters). Surface thermistors 39b, 39c, and 39d are attached. Based on the detected temperatures of the tank internal thermistor 39a and the tank surface thermistors 39b, 39c, 39d, the heat storage state of the hot water storage tank 21 can be detected.

  A hot water supply water passage 33 is connected to the bottom of the hot water tank 21. A hot water supply water return path 34 is connected to the top of the hot water tank 21. The hot water supply water passage 33 communicates with the hot water supply water inflow passage 19a of the HP unit 10 via the first hot water supply water connection pipe 102a. The hot water supply water return path 34 communicates with the hot water supply water outflow path 19b of the HP unit 10 via the second hot water supply water connection pipe 102b. When the hot-water supply water circulation pump 18 is driven, hot-water supply water is sucked out from the lower part of the hot water storage tank 21 to the hot-water supply water forward path 33, and the hot-water supply water flows through the hot-water supply water flow path 13 b of the three-fluid heat exchanger 13. And returned to the top of the hot water tank 21. In this way, a hot water supply water circulation path is configured between the hot water storage tank 21 and the heat pump 11.

  A hot water supply forward thermistor 36 is attached to the hot water supply water forward 33. The hot water supply forward thermistor 36 detects the temperature of the water flowing through the hot water supply water outward 33. A pressure release path 38 is connected to the hot water supply water return path 34. A relief valve 38 a is attached to the pressure release path 38. The valve opening pressure of the relief valve 38a is set to be slightly larger than the pressure regulation value of the pressure reducing valve 22b described later. When the pressure regulation of the pressure reducing valve 22b becomes impossible, the relief valve 38a is opened to prevent the pressure in the hot water storage tank 21 from exceeding the pressure capable of withstanding pressure.

  A water supply path 22 for supplying water to the hot water storage tank 21 is connected to the bottom of the hot water storage tank 21. Tap water is supplied to the water supply path 22 via the tap water inlet 22a. A pressure reducing valve 22b and a water supply thermistor 22c are attached to the water supply path 22. The pressure reducing valve 22 b adjusts the water supply pressure in the water supply path 22. The water supply thermistor 22 c detects the temperature of the water flowing through the water supply path 22. A bypass water supply path 26 is branched from the water supply path 22. A check valve 22 d is attached to the water supply path 22 on the downstream side of the branch point of the bypass water supply path 26. Further, a drainage path 31 is connected to the water supply path 22 on the downstream side of the check valve 22d. A drain valve 32 that can be manually opened and closed is attached to the drain path 31. When the drain valve 32 is opened, the water in the hot water tank 21 is discharged to the outside through the drain path 31.

  A check valve 26 a and a water supply flow sensor 26 b are attached to the bypass water supply path 26. The water supply flow rate sensor 26 b adjusts the flow rate of water flowing through the bypass water supply path 26. The bypass water supply path 26 is connected to the mixing valve 23.

  A hot water path 25 is connected to the top of the hot water tank 21. A check valve 25 a and a hot water flow sensor 25 b are attached to the hot water path 25. The warm water flow sensor 25b detects the flow rate of water flowing through the warm water path 25. The hot water path 25 is connected to the mixing valve 23.

  The mixing valve 23 mixes the low-temperature water from the bypass water supply path 26 and the high-temperature water from the hot water path 25 and sends the mixed water to the mixed hot water path 27. The mixing valve 23 can adjust the opening degree of the bypass water supply path 26 and the opening degree of the hot water path 25 by driving a built-in valve by a stepping motor. A mixed thermistor 27 a is attached to the mixed hot water path 27. The mixing thermistor 27 a detects the temperature of the water flowing through the mixed hot water path 27.

  The mixed hot water path 27 is branched into a hot water supply burner forward path 28a and a hot water supply burner bypass path 28b. A bypass control valve 28d is attached to the hot water supply burner bypass 28b. The bypass control valve 28d switches between opening and closing of the hot water supply burner bypass passage 28b. The hot water supply burner bypass path 28 b joins with the hot water supply burner return path 28 c and communicates with the hot water supply path 29. A hot water supply thermistor 29 a is attached to the hot water supply path 29. The hot water supply thermistor 29 a detects the temperature of the water flowing through the hot water supply path 29. The hot water supply path 29 communicates with the hot water tap 80. The hot-water tap 80 is disposed in a bathroom, a washroom, a kitchen, etc. (in FIG. 1, the plurality of hot-water taps 80 are represented by one).

  As shown in FIG. 2, the gas heat source unit 50 includes a water heater 51, a heating circulation path 61, and a bathtub circulation path 71. The water heater 51 includes a hot water supply heat exchanger 53, a burner 54, and the like. A hot water supply water inflow passage 52 is connected to the inlet side of the hot water supply heat exchanger 53. The hot water supply water inflow passage 52 communicates with the hot water supply burner forward passage 28a of the hot water storage unit 20 through the third hot water supply water connection pipe 104a. A hot water supply water outflow passage 55 is connected to the outlet side of the hot water supply heat exchanger 53. The hot water supply water outflow passage 55 communicates with the hot water supply burner return passage 28c of the hot water storage unit 20 via the fourth hot water supply water connection pipe 104b.

  A water supply thermistor 52a, a hot water supply amount sensor 52b, and a water amount servo 52c are attached to the hot water supply water inflow passage 52. The incoming water thermistor 52a and the hot water supply amount sensor 52b detect the temperature and flow rate of hot water flowing through the hot water supply water inflow passage 52, respectively. The water quantity servo 52c adjusts the flow rate of hot water supply water flowing through the hot water supply water inflow passage 52. The burner 54 heats the hot water supply heat exchanger 53 by gas combustion. A can body thermistor 56 is attached to the hot water supply water outflow passage 55 in the vicinity of the outlet of the hot water supply heat exchanger 53, and a hot water thermistor 57 is attached to the downstream side thereof.

  A burner bypass path 58 is connected between the downstream side of the water amount servo 52 c in the hot water supply water inflow path 52 and between the can body thermistor 56 and the hot water thermistor 57 in the hot water supply water outflow path 55. A bypass control valve 59 is provided at a connecting portion between the hot water supply water inflow passage 52 and the burner bypass passage 58. By adjusting the opening degree of the bypass control valve 59, the flow rate of the hot water supply water flowing from the hot water supply water inflow passage 52 to the burner bypass passage 58 is adjusted.

  The heating circulation path 61 includes a cistern 62, a first heating heat exchanger 63c, a second heating heat exchanger 66c, a burner 69, and the like. The cistern 62 is an open container that stores heating water (for example, water or antifreeze) therein. A heating forward path 63 is connected to the bottom of the cistern 62. A heating water circulation pump 63a and a heating low temperature thermistor 63b are attached to the heating forward path 63. The heating low temperature thermistor 63 b detects the temperature of the heating water flowing through the heating forward path 63. A low temperature heating forward path 64 is branched from the heating outward path 63 downstream of the heating water circulation pump 63a. The low temperature heating forward path 64 is connected to the entrance side of a low temperature heating terminal 67a such as a floor heater. The heating forward path 63 is connected to the inlet side of the first heating heat exchanger 63c. A high temperature heating forward path 65 is connected to the outlet side of the first heating heat exchanger 63c. The high temperature heating forward path 65 is provided with a heating high temperature thermistor 65a. The heating high temperature thermistor 65 a detects the temperature of the heating water flowing through the high temperature heating forward path 65. The high temperature heating forward path 65 is connected to the entrance side of a high temperature heating terminal 67b such as a bathroom drying heater. A first heating return path 60a is connected to the outlet side of the high temperature heating terminal 67b. A second heating return path 60b is connected to the outlet side of the low temperature heating terminal 67a. The second heating return path 60b joins the first heating return path 60a.

  A third heating return path 60c is connected to the inlet side of the second heating heat exchanger 66c. A fourth heating return path 60d is connected to the outlet side of the second heating heat exchanger 66c. The fourth heating return path 60 d communicates with the bottom of the cistern 62. The burner 69 heats the first heating heat exchanger 63c and the second heating heat exchanger 66c by gas combustion. The high temperature heating forward path 65 and the fourth heating return path 60 d are connected via a heating bypass path 68. The heating bypass path 68 is provided with a heating bypass control valve 68a.

  The high temperature heating forward path 65 and the third heating return path 60 c are connected via a reheating path 78. A reheating flow rate control valve 78 a is provided at a connection point of the reheating route 78 in the high temperature heating forward path 65. By adjusting the opening degree of the reheating flow control valve 78a, the flow rate of the heating water flowing from the high temperature heating forward path 65 to the reheating path 78 is adjusted. A reheating heat exchanger 76 is provided in the reheating path 78. In the reheating heat exchanger 76, heat is exchanged between the heating water flowing through the heating water flow path 76a and the bathtub water flowing through the bathtub water flow path 76b.

  Both ends of the bathtub circulation path 71 are connected in the bathtub 72. In the bathtub circulation path 71, a bathtub pump 73, a water flow switch 74, a bathtub return thermistor 75, a reheating heat exchanger 76, and a bathtub forward thermistor 77 are provided in this order. When the bathtub pump 73 is driven, the hot water in the bathtub 72 flows through the bathtub circulation path 71 as indicated by the solid line arrow, and flows through the heating water flow path 76a when flowing through the bathtub water flow path 76b of the reheating heat exchanger 76. Heated by water for heating. The bathtub return thermistor 75 detects the temperature of the bathtub water flowing into the bathtub circulation path 71 from the bathtub 72. The bathtub going thermistor 77 detects the temperature of the bathtub water after being heated by the reheating heat exchanger 76.

  In the bathtub circulation path 71, a hot water path 70 is connected upstream of the reheating heat exchanger 76. The hot water beam path 70 is connected to the hot water supply water outflow path 55. The hot water path 70 is provided with a hot water valve 70a and a hot water amount sensor 70b. When the hot water valve 70a is opened, hot water from the hot water supply water outflow passage 55 is supplied to the bathtub 72 through the hot water passage 70 and the bathtub circulation passage 71 as shown by the broken line arrows.

  As shown in FIG. 1, the hot water storage unit 20 is provided with a relay forward path 82a, a relay return path 82b, and a relay bypass path 82c. The relay forward path 82a communicates with the heating water inflow path 19c of the HP unit 10 via the first heating water connection pipe 106a. The relay return path 82b communicates with the heating water outflow path 19d of the HP unit 10 via the second heating water connection pipe 106b. The relay forward path 82a communicates with the first heating return path 60a of the gas heat source unit 50 through the third heating water connection pipe 108a. The relay return path 82b communicates with the third heating return path 60c of the gas heat source unit 50 via the fourth heating water connection pipe 108b. The relay bypass path 82 c connects the relay forward path 82 a and the relay return path 82 b inside the hot water storage unit 20. A mixing valve 83 is attached to a connection point of the relay bypass path 82c in the relay forward path 82a. An HP forward thermistor 84a is attached upstream of the mixing valve 83 in the relay forward path 82a. An HP return thermistor 84b is attached on the upstream side of the relay return path 82b from the connection location of the relay bypass path 82c. A heating and mixing thermistor 84c is attached to the downstream side of the relay return path 82b from the connection point of the relay bypass path 82c.

  The HP unit 10 is provided with an HP controller 10 a that controls the operation of each component of the HP unit 10. The gas heat source unit 50 is provided with a gas heat source controller 50 a that controls the operation of each component of the gas heat source unit 50. The hot water storage unit 20 is provided with a hot water storage controller 20a that controls the operation of each component of the hot water storage unit 20, and a remote controller 20b that is communicably connected to the hot water storage controller 20a. The remote controller 20b presents various types of information to the user of the hot water supply and heating system 2, and accepts various operation inputs from the user of the hot water supply and heating system 2. The HP controller 10a and the hot water storage controller 20a are connected so as to communicate with each other. The gas heat source controller 50a and the hot water storage controller 20a are connected so as to communicate with each other. The hot water supply and heating system 2 can execute various operations by the HP controller 10a, the hot water storage controller 20a, and the gas heat source controller 50a performing control in cooperation with each other. Hereinafter, the HP controller 10a, the hot water storage controller 20a, and the gas heat source controller 50a are collectively referred to simply as a controller.

  The hot water supply / heating system 2 can perform the following various operations.

(Heat storage operation)
In the heat storage operation, the hot water in the hot water storage tank 21 is heated by the heat pump 11, and the hot hot water is returned to the hot water storage tank 21. In the heat storage operation, the HP controller 10a drives the compressor 12 and the fan 15a to operate the heat pump 11, and drives the hot water supply water circulation pump 18.

  By driving the compressor 12, the refrigerant of the heat pump 11 circulates in the order of the compressor 12, the three-fluid heat exchanger 13, the expansion valve 14, and the air heat exchanger 15. In this case, the refrigerant in the refrigerant flow path 13a passing through the three-fluid heat exchanger 13 is in a high-temperature and high-pressure gas state. The hot water supply water circulation pump 18 drives the hot water supply water in the lower part of the hot water storage tank 21 through the hot water supply water forward path 33, the first hot water supply water connection pipe 102a, and the hot water supply water inflow path 19a. The hot water supply water introduced into 13b is heated by heat exchange with the refrigerant. The heated hot water supply water is returned to the upper portion of the hot water storage tank 21 through the hot water supply water outflow passage 19b, the second hot water supply water connection pipe 102b, and the hot water supply water return passage 34. Thereby, hot water supply water is stored in the hot water storage tank 21. When the inside of the hot water storage tank 21 is filled with high-temperature hot water supply water, the heat storage operation ends.

(Anti-freezing operation)
The hot water supply / heating system 2 is operated to prevent freezing so that the water does not freeze inside the three-fluid heat exchanger 13 of the HP unit 10 and the associated piping when the outside air temperature becomes a predetermined temperature or less. I do. In the freeze prevention operation, the HP controller 10 a drives the hot water supply water circulation pump 18 without driving the heat pump 11. Thus, the water in the hot water supply water flow path 13b of the three-fluid heat exchanger 13, the hot water supply water inflow path 19a, the hot water supply water outflow path 19b, the first hot water supply water connection pipe 102a, and the second hot water supply water connection pipe 102b circulate. Thus, freezing due to water staying in these pipes for a long time is prevented.

(Defrosting operation)
In a situation where the outside air temperature is low, the air heat exchanger 15 may be frosted. If the air heat exchanger 15 is frosted, the heating efficiency of the heat pump 11 will be reduced. For this reason, when there is a possibility that the air heat exchanger 15 may be frosted, the hot water supply / heating system 2 performs a defrosting operation. In the defrosting operation, the HP controller 10a drives the compressor 12 with the defrosting valve 17 opened. As a result, the high-temperature refrigerant is supplied to the air heat exchanger 15, and the frost adhered to the surface of the air heat exchanger 15 can be melted to defrost the air heat exchanger 15.

(Hot water operation)
The hot water supply operation is an operation for supplying hot water in the hot water storage tank 21 to the hot water tap 80. The hot water supply operation can also be performed in parallel with the above heat storage operation. When the hot water tap 80 is opened, tap water flows into the lower part of the hot water tank 21 due to the water pressure from the water supply path 22. At the same time, the hot water supply water in the upper part of the hot water tank 21 is supplied to the mixed hot water passage 27 via the hot water passage 25.

  When the temperature of the hot water supplied from the hot water storage tank 21 to the hot water path 25 is higher than the set hot water temperature, the hot water storage controller 20a drives the mixing valve 23 and taps the tap water from the bypass water supply path 26 to the mixed hot water path 27. Is introduced. Therefore, the hot water supply water supplied from the hot water path 25 and the tap water supplied from the bypass water supply path 26 are mixed and supplied to the mixed hot water path 27. The hot water storage controller 20a adjusts the opening degree of the mixing valve 23 so that the temperature of the hot water supplied to the hot water tap 80 matches the hot water supply set temperature. On the other hand, when the temperature of hot water supplied from the hot water storage tank 21 to the hot water path 25 is lower than the hot water set temperature, the gas heat source controller 50a starts the combustion operation of the burner 54 and passes through the hot water heat exchanger 53. Heat the water. The gas heat source controller 50a controls the output of the burner 54 so that the temperature of the hot water supplied to the hot water tap 80 coincides with the hot water supply set temperature.

(Heating operation)
The heating operation is an operation in which heating water is heated by the heat pump 11 and heated by the low temperature heating terminal 67a or the high temperature heating terminal 67b using the heating water that has become high temperature. When the execution of the heating operation is instructed via the remote controller 20b, the gas heat source controller 50a drives the heating water circulation pump 63a. Further, the HP controller 10a drives the compressor 12 and the fan 15a. Thereby, the water for heating heated by the three-fluid heat exchanger 13 is supplied to the low temperature heating terminal 67a and the high temperature heating terminal 67b through the cistern 62. Further, the gas heat source controller 50a starts the combustion operation of the burner 69 as necessary. Thereby, the high temperature heating terminal 67b is supplied with the heating water heated by the first heating heat exchanger 63c and further heated. In the heating operation, so that the temperature of the heating water supplied to the low temperature heating terminal 67a becomes the low temperature heating set temperature, and the temperature of the heating water supplied to the high temperature heating terminal 67b becomes the high temperature heating set temperature, The operation of the heat pump 11 and the output of the burner 69 are adjusted.

  As the number of operating low-temperature heating terminals 67a and high-temperature heating terminals 67b increases, the load on the heating water circulation pump 63a increases accordingly. Therefore, in this embodiment, the opening degree of the mixing valve 83 is adjusted according to the number of operating low-temperature heating terminals 67a and high-temperature heating terminals 67b, and as the number of operating low-temperature heating terminals 67a and high-temperature heating terminals 67b increases, The ratio of the heating water flowing through the relay bypass path 82c is increased. When the ratio of the heating water flowing through the relay bypass path 82c increases, the ratio of the heating water flowing through the three-fluid heat exchanger 13 having a high pressure loss is reduced, and the load of the heating water circulation pump 63a is reduced. By setting it as such a structure, even when the number of the low temperature heating terminal 67a and the high temperature heating terminal 67b which operate | moves increases, the increase in the load of the water circulation pump 63a for heating can be suppressed.

(Hot water operation)
The hot water operation is an operation in which hot water is applied to the bathtub 72. When the start of hot water operation is instructed via the remote controller 20b, the hot water supply / heating system 2 starts the hot water operation. In the hot water operation, the gas heat source controller 50a opens the hot water valve 70a. When the hot water valve 70 a is opened, hot water supply water is supplied from the hot water supply water outflow passage 55 to the bathtub 72 via the hot water supply passage 70 and the bathtub circulation passage 71. In the hot water operation, the temperature of the water supplied to the hot water path 70 is adjusted to the hot water setting temperature in the same manner as the hot water supply operation. When the amount of water supplied to the bathtub 72 reaches the hot water setting water amount, the hot water operation is terminated.

(Reaping driving)
The chasing operation is an operation for chasing the bathtub water stored in the bathtub 72. When the start of the reheating operation is instructed via the remote controller 20b, the hot water supply / heating system 2 starts the reheating operation. In the chasing operation, the bathtub pump 73 is driven. Moreover, the opening degree of the reheating flow control valve 78a is adjusted to drive the heating water circulation pump 63a. Thereby, the bathtub water is sucked out from the bathtub 72 and heated by the reheating heat exchanger 76 by heat exchange with the heating water. The heated bathtub water is returned to the bathtub 72. In the reheating operation, heating water is heated by the burner 69.

(Detection of incorrect piping connection)
When installing the hot water supply and heating system 2, the connection pipe between the HP unit 10 and the hot water storage unit 20 and the connection pipe between the hot water storage unit 20 and the gas heat source unit 50 may be erroneously connected. For example, between the HP unit 10 and the hot water storage unit 20, the first heating water connection pipe 106a is connected between the relay forward path 82a and the heating water outflow path 19d, and the second heating water connection pipe 106b is connected to the relay return path 82b. There may be a connection between the heating water inflow channels 19c. Alternatively, between the hot water storage unit 20 and the gas heat source unit 50, the third heating water connection pipe 108a is connected between the relay forward path 82a and the third heating return path 60c, and the fourth heating water connection pipe 108b is connected to the relay return path 82b. And the first heating return path 60a may be connected. In the hot water supply and heating system 2 of the present embodiment, when performing the heating operation, the controller performs an erroneous pipe detection process shown in FIG. 3 to check whether or not the pipe connection is correctly performed. In the erroneous pipe detection process shown in FIG. 3, the temperature relationship of the temperature of the heating water in the heating operation, that is, the heating water sent from the gas heat source unit 50 to the HP unit 10 via the hot water storage unit 20 is low temperature, and three-fluid heat exchange is performed. Based on the relationship that the heating water heated by the vessel 13 and returned from the HP unit 10 to the gas heat source unit 50 through the hot water storage unit 20 is at a high temperature, it is determined whether or not the pipe connection is correctly performed.

  In step S2, the controller determines whether or not the compressor 12 is being forcibly driven. When the compressor 12 is forcibly driven (in the case of YES), it is considered that heating water for heating in the three-fluid heat exchanger 13 is not normally performed, so the process returns to step S2. If the compressor 12 is not being forcibly driven (NO in step S2), the process proceeds to step S4.

  In step S4, the controller determines whether or not the freeze prevention operation is being executed. In the freeze prevention operation, it is considered that the heating water in the three-fluid heat exchanger 13 is not heated as usual, so the process returns to step S2. If the freeze prevention operation is not performed (NO in step S4), the process proceeds to step S6.

  In step S6, the controller determines whether the defrosting operation is being executed. In the defrosting operation, it is considered that heating water for heating in the three-fluid heat exchanger 13 is not normally performed, and thus the process returns to step S2. If the defrosting operation is not performed (NO in step S6), the process proceeds to step S8.

  In step S8, step S10 and step S12, the temperature detected by the heating inflow thermistor 16a (heating inflow temperature), the temperature detected by the heating outflow thermistor 16b (heating outflow temperature), and the HP return thermistor 84b. When the temperatures (HP return temperature) are all 0 ° C. or higher (when all of Step S8, Step S10, and Step S12 are NO), the controller determines that the heating operation is normally performed. Then, the process proceeds to step S14. In other cases (when any of step S8, step S10, and step S12 is YES), the process returns to step S2.

  In step S14, the controller adds the first predetermined temperature (eg, + 5 ° C.) to the temperature (HP return temperature) detected by the HP return thermistor 84b over a first predetermined time (eg, 9 minutes). It is determined whether or not the temperature is lower than the temperature detected by the HP going thermistor 84a (HP going temperature). When the third heating water connection pipe 108a and the fourth heating water connection pipe 108b are normally connected, the heating is performed regardless of the connection between the first heating water connection pipe 106a and the second heating water connection pipe 106b. Heating water sent from the gas heat source unit 50 to the hot water storage unit 20 by driving the water circulation pump 63a (that is, low-temperature heating water before heating by the heat pump 11) flows through the relay forward path 82a, and from the hot water storage unit 20 to the gas heat source unit 50. The heating water to be returned (that is, high-temperature heating water after being heated by the heat pump 11) flows through the relay return path 82b. Therefore, when the third heating water connection pipe 108a and the fourth heating water connection pipe 108b are normally connected, the temperature detected by the HP return thermistor 84b is higher than the temperature detected by the HP forward thermistor 84a. Should be expensive. Focusing on this relationship, in the hot water supply and heating system 2 of the present embodiment, the temperature obtained by adding the first predetermined temperature to the temperature detected by the HP return thermistor 84b over the first predetermined time is the HP going thermistor 84a. When the temperature is lower than the detected temperature (in the case of YES in step S14), the process proceeds to step S16, and it is determined that there is an erroneous connection of the pipes in the third heating water connection pipe 108a and the fourth heating water connection pipe 108b. . In step S16, the controller informs that the third heating water connection pipe 108a and the fourth heating water connection pipe 108b are misconnected through the remote controller 20b, and normally connects these pipes. Encourage repair. After step S16, the process of FIG. 3 ends.

  If NO in step S14, the process proceeds to step S18. In step S18, the controller determines whether or not the mixing valve 83 fully closes the relay bypass path 82c. When the relay bypass passage 82c is opened, even if there is an erroneous connection in the third heating water connection pipe 108a and the fourth heating water connection pipe 108b, the temperature detected by the HP return thermistor 84b and the HP forward thermistor 84a. There is a possibility that the temperature difference between the detected temperatures becomes small and NO is determined in step S14. Therefore, the process proceeds to step S20 only when the mixing valve 83 fully closes the relay bypass path 82c in step S18 (in the case of YES). If the mixing valve 83 does not fully close the relay bypass path 82c in step S18 (NO), the process returns to step S2.

  In step S20, the controller adds a second predetermined temperature (for example, + 5 ° C.) to a temperature (heating outflow temperature) detected by the heating / outflow thermistor 16b over a second predetermined time (for example, 15 minutes). It is determined whether or not the temperature (heating inflow temperature) detected by the heating inflow thermistor 16a is below. When step S20 is performed, it is already known that the third heating water connection pipe 108a and the fourth heating water connection pipe 108b are correctly connected. Therefore, when the first heating water connection pipe 106a and the second heating water connection pipe 106b are normally connected, the heating water sent from the hot water storage unit 20 to the HP unit 10 by driving the heating water circulation pump 63a (that is, , Low-temperature heating water before heating by the heat pump 11) flows through the heating water inflow passage 19 c, and heating water returned to the hot water storage unit 20 from the HP unit 10 (that is, high-temperature heating water after heating by the heat pump 11) is heating water. It flows through the outflow channel 19d. Accordingly, when the first heating water connection pipe 106a and the second heating water connection pipe 106b are normally connected, the temperature detected by the heating outflow thermistor 16b is higher than the temperature detected by the heating inflow thermistor 16a. Should be expensive. Focusing on this relationship, in the hot water supply and heating system 2 of the present embodiment, the temperature obtained by adding the second predetermined temperature to the temperature detected by the heating outflow thermistor 16b over the second predetermined time is the heating inflow thermistor 16a. When the temperature is lower than the detected temperature (in the case of YES in step S20), the process proceeds to step S22, and the controller has an erroneous connection of pipes in the first heating water connection pipe 106a and the second heating water connection pipe 106b. Judge. In step S22, the controller notifies that there is an erroneous connection of the pipes in the first heating water connection pipe 106a and the second heating water connection pipe 106b via the remote controller 20b, and reconnects these pipes normally. Encourage After step S22, the process of FIG. 3 ends.

  In the case of NO in step S20, in step S24, the controller indicates that the pipes in the third heating water connection pipe 108a and the fourth heating water connection pipe 108b are normally connected, and the first heating water connection pipe 106a and the second heating water connection pipe 106a are connected. It is determined that the pipe in the heating water connection pipe 106b is normally connected. After step S24, the process of FIG. 3 ends. In the hot water supply and heating system 2 of the present embodiment, once it is determined that the pipe is normally connected in step S24 even once, in the subsequent heating operation, the pipe misconnection detection process of FIG. 3 is not performed. To.

  As described above, the hot water supply and heating system 2 (corresponding to a thermal device) of the present embodiment includes a three-fluid heat exchanger 13 (corresponding to a heat exchanger) that heats heating water (corresponding to a heat medium), Heating water inflow passage 19c (corresponding to a heat medium inflow passage) communicating with one end of the three-fluid heat exchanger 13 and heating water outflow passage 19d (corresponding to the heat medium outflow passage) communicating with the other end of the three-fluid heat exchanger 13 HP unit 10 (corresponding to the first unit), a heating water circulation pump 63a (corresponding to a circulation pump) that circulates the heating water, and a first communicating with one end of the heating water circulation pump 63a. Gas heat source unit 50 (second unit) including a heating return path 60a (corresponding to a heat medium delivery path) and a third heating return path 60c (corresponding to a heat medium receiving path) communicating with the other end of the heating water circulation pump 63a. And HP Yu The hot water storage unit 20 (corresponding to the third unit), which is disposed between the hot water tank 10 and the gas heat source unit 50 and includes the relay forward path 82a and the relay return path 82b, is connected to the heating water inflow path 19c and the relay forward path 82a. And a first heating water connection pipe 106a and a second heating water connection pipe 106b (corresponding to a pair of connection pipes) between the HP unit 10 and the hot water storage unit 20 that connect the heating water outflow path 19d and the relay return path 82b. The third heating water connection pipe 108 a and the fourth heating water between the gas heat source unit 50 and the hot water storage unit 20, which connect the first heating return path 60 a and the relay return path 82 a, and connect the third heating return path 60 c and the relay return path 82 b. Connection pipe 108b (corresponding to a pair of connection pipes), HP controller 10a, hot water storage controller 20a, gas heat source controller 5 And a a (corresponding to the controller). In the hot water supply / heating system 2, the hot water storage unit 20 includes an HP forward thermistor 84a (corresponding to the relay forward thermistor) provided in the relay forward path 82a and an HP return thermistor 84b (corresponding to the relay backward path thermistor) provided in the relay backward path 82b. ). In the hot water supply / heating system 2, when heating and heating water is circulated between the HP unit 10 and the gas heat source unit 50 via the hot water storage unit 20, detection of the HP forward thermistor 84a is performed for a first predetermined time (9 minutes). When the temperature is higher than the detection temperature of the HP return thermistor 84b by a first predetermined temperature (+ 5 ° C.) or more, the controller uses the third heating water connection pipe 108a and the fourth heating water connection pipe 108a between the gas heat source unit 50 and the hot water storage unit 20 and the fourth. It is determined that the heating water connection pipe 108b is connected by mistake.

  Moreover, in the hot water supply and heating system 2 of the present embodiment, the HP unit 10 is provided in the heating inflow thermistor 16a (corresponding to the heating medium inflow passage thermistor) provided in the heating water inflow passage 19c and the heating water outflow passage 19d. Further, a heating outflow thermistor 16b (corresponding to a heat medium outflow path thermistor) is further provided. In the hot water supply / heating system 2, when heating water is circulated between the HP unit 10 and the gas heat source unit 50 through the hot water storage unit 20 for heating, the third heating water connection between the gas heat source unit 50 and the hot water storage unit 20 is performed. The pipe 108a and the fourth heating water connection pipe 108b are correctly connected, and the detected temperature of the heating inflow thermistor 16a is higher than the detected temperature of the heating outflow thermistor 16b over a second predetermined time (15 minutes). When the temperature is higher than (+ 5 ° C.), the controller determines that the first heating water connection pipe 106a and the second heating water connection pipe 106b between the HP unit 10 and the hot water storage unit 20 are erroneously connected.

  In the hot water supply and heating system 2 of the present embodiment, the hot water storage unit 20 includes a relay bypass path 82c (corresponding to a bypass path) that connects the relay forward path 82a and the relay return path 82b, and a mixing valve 83 (bypass) that opens and closes the relay bypass path 82c. Corresponding to a valve). In the hot water supply and heating system 2, when heating water is circulated between the HP unit 10 and the gas heat source unit 50 through the hot water storage unit 20 and heated, the gas is kept in a state where the relay bypass path 82 c is closed by the mixing valve 83. When it is not determined that the third heating water connection pipe 108 a and the fourth heating water connection pipe 108 b between the heat source unit 50 and the hot water storage unit 20 are erroneously connected, the controller controls the gas heat source unit 50 and the hot water storage unit 20. It is determined that the third heating water connection pipe 108a and the fourth heating water connection pipe 108b are correctly connected.

  In the above embodiment, the case where the HP unit 10 is the first unit, the gas heat source unit 50 is the second unit, and the hot water storage unit 20 is the third unit has been described as an example. The configuration of the thermal device is not limited to this. The present invention includes a first unit having a heat exchanger for heating a heat medium, a second unit having a circulation pump for circulating the heat medium, and a first unit interposed between the first unit and the second unit. It is possible to apply to general thermal equipment including three units.

  Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. In addition, the technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

2 Hot water supply and heating system 10 HP unit 10a HP controller 11 Heat pump 12 Compressor 13 Three-fluid heat exchanger 13a Refrigerant flow path 13b Hot water flow path 13c Heating water flow path 14 Expansion valve 15 Air heat exchanger 15a Fan 16a Heating inflow thermistor 16b Heating outflow thermistor 17 Defrost valve 18 Hot water supply water circulation pump 19a Hot water supply water inflow passage 19b Hot water supply outflow passage 19c Heating water inflow passage 19d Heating water outflow passage 20 Hot water storage unit 20a Hot water storage controller 20b Remote control 21 Hot water storage tank 22 Water supply passage 22a Tap water inlet 22b Pressure reducing valve 22c Water supply thermistor 22d Check valve 23 Mixing valve 25 Hot water path 25a Check valve 25b Hot water flow rate sensor 26 Bypass water supply path 26a Check valve 26b Water supply flow rate sensor 27 Mixed hot water path 27a Mixed thermistor 28a Hot water supply burner Path 28b Hot water supply burner bypass path 28c Hot water supply burner return path 28d Bypass control valve 29 Hot water supply path 29a Hot water supply thermistor 31 Drainage path 32 Drain valve 33 Hot water supply water path 34 Hot water supply water return path 36 Hot water supply path thermistor 38 Pressure release path 38a Relief valve 39a Relief valve 39a Tank internal thermistor 39b , 39c, 39d Tank surface thermistor 50 Gas heat source unit 50a Gas heat source controller 51 Water heater 52 Hot water inflow passage 52a Hot water inlet thermistor 52b Hot water amount sensor 52c Water amount servo 53 Hot water heat exchanger 54 Burner 55 Hot water outflow passage 56 Can body thermistor 57 Hot water thermistor 58 Burner bypass path 59 Bypass control valve 60a First heating return path 60b Second heating return path 60c Third heating return path 60d Fourth heating return path 61 Heating circulation path 62 Systurn 63 Heating path 6 3a Heating water circulation pump 63b Heating low temperature thermistor 63c First heating heat exchanger 64 Low temperature heating outbound path 65 High temperature heating outbound path 65a Heating high temperature thermistor 66c Second heating heat exchanger 67a Low temperature heating terminal 67b High temperature heating terminal 68 Heating bypass path 68a Heating bypass Control valve 69 Burner 70 Hot water path 70a Hot water valve 70b Hot water volume sensor 71 Bath circulation path 72 Bath 73 Bath pump 74 Water flow switch 75 Bath return thermistor 76 Reheating heat exchanger 76a Heating water flow path 76b Bath water flow path 77 Bathtub Forward thermistor 78 Reheating path 78a Reheating flow control valve 80 Hot water tap 82a Relay outbound path 82b Relay return path 82c Relay bypass path 83 Mixing valve 84a HP outbound thermistor 84b HP return thermistor 84c Heating mixed thermistor 102a First hot water supply water connection distribution 102b second water for hot water supply connection pipe 104a third water for hot water supply connection pipe 104b fourth water for hot water supply connection pipe 106a a first heating water connection pipe 106b second heating water connection pipe 108a third heating water connection pipe 108b fourth heating water connection pipe

Claims (3)

A first unit comprising a heat exchanger for heating the heat medium, a heat medium inflow passage communicating with one end of the heat exchanger, and a heat medium outflow passage communicating with the other end of the heat exchanger;
A second unit comprising a circulation pump that circulates the heat medium, a heat medium delivery path that communicates with one end of the circulation pump, and a heat medium reception path that communicates with the other end of the circulation pump;
A third unit disposed between the first unit and the second unit, comprising a relay forward path and a relay return path;
A pair of connecting pipes between the first unit and the third unit that connect the heat medium inflow path and the relay forward path, and connect the heat medium outflow path and the relay return path;
A pair of connecting pipes between the second unit and the third unit, connecting the heat medium delivery path and the relay forward path, connecting the heat medium receiving path and the relay return path;
A thermal device comprising a controller,
The third unit further includes a relay forward thermistor provided in the relay forward route and a relay return thermistor provided in the relay return route,
When the heating medium is circulated and heated between the first unit and the second unit via the third unit, the detection temperature of the relay forward thermistor becomes the detection temperature of the relay return thermistor over the first predetermined time. A thermal apparatus in which the controller determines that the pair of connecting pipes between the second unit and the third unit are erroneously connected when the temperature is higher than the first predetermined temperature. The first unit further includes a heat medium inflow channel thermistor provided in the heat medium inflow channel, and a heat medium outflow channel thermistor provided in the heat medium outflow channel,
When heating by circulating a heat medium between the first unit and the second unit via the third unit, the pair of connecting pipes between the second unit and the third unit are correctly connected. And when the detected temperature of the heat medium inflow path thermistor is higher than the detected temperature of the heat medium outflow path thermistor over a second predetermined time by a second predetermined temperature or more, The thermal apparatus according to claim 1, wherein a pair of connecting pipes between the units is determined to be connected by mistake. The third unit further includes a bypass path that connects the relay forward path and the relay return path, and a bypass valve that opens and closes the bypass path,
When the heating medium is circulated and heated between the first unit and the second unit via the third unit, the second unit and the third unit are closed with the bypass path closed by the bypass valve. The controller determines that the pair of connection pipes between the second unit and the third unit are correctly connected when it is not determined that the pair of connection pipes between the units is connected by mistake; The thermal device according to claim 1 or 2.

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