JP6530299B2 - Heating system - Google Patents

Description

  The present invention relates to a heating apparatus that performs heating using a heat medium such as warm water.

  In a heating apparatus using a heat medium such as hot water, the hot water heated by a heat source machine such as a heat pump is stored in a storage tank, and the stored hot water is circulated through a heating terminal such as a floor heating apparatus to A configuration is known in which heating is performed by radiating heat with a floor heating apparatus. Such a heating device connects the heat pump and the storage tank by piping. If the piping is not properly connected, heating at the desired temperature can not be performed. Then, the technique which determines whether piping is correctly connected is proposed (for example, patent document 1 and 2).

  In the heating device described in Patent Document 1, when the heat pump outlet temperature is higher than the heat pump inlet temperature and the lower tank temperature is higher than the upper tank temperature, the heat pump itself operates normally but the hot water Since the lower part temperature of the tank is higher than the upper part temperature of the tank, which is supposed to flow, it is determined that the heat pump and the storage tank are not properly connected, and a display for instructing confirmation of the connection state is performed.

  When the heating device described in Patent Document 2 sends hot water at the bottom of the storage tank to the heat pump by driving the circulation pump, the flow rate sensor provided in the flow path detects the flow rate, and the detected flow rate and boiling point The difference between the indicated flow rate and the instructed flow rate is calculated based on the raised temperature, and if the calculated amount is larger than the predetermined flow rate, it is determined that the heat pump and the storage tank are not properly connected.

JP 2007-333288 A JP, 2011-099602, A

  In the heating device having an auxiliary heat source different from the heat pump, the auxiliary heat source is provided in the middle of the heating circuit which connects the storage tank and the heating terminal. In such a heating device, in order to determine the normal connection between the heating circulation path and the storage tank, it is conceivable to perform the connection determination as described in Patent Documents 1 and 2.

  However, in patent document 1, although it determines with misconnection when the tank lower part temperature is higher than tank upper part temperature, when it is misconnected and warm water flows from tank lower part to tank upper part, there are many flow rates of warm water In some cases, the hot water may flow from the bottom of the tank to the top of the tank without a temperature drop. In this case, the upper tank temperature and the lower tank temperature become substantially the same, and even if the connection is incorrect, it is determined that the connection is normal. In addition, when the heat pump starts to drive, the tank upper temperature and the tank lower temperature may be almost the same even if it is misconnected due to a lack of heat pump capacity, and it is determined that the connection is normal even if it is misconnected. Be done.

  In patent document 2, although the difference of the detection flow volume and the instruction | indication flow volume in a flow volume sensor is larger than predetermined flow volume, it determines with incorrect connection, but when the flow volume of warm water is large, it is misconnected. Even in this case, the difference between the flow rate detected by the flow rate sensor and the indicated flow rate may not be larger than the predetermined flow rate, and even if the connection is incorrect, it is determined that the connection is normal.

  This invention is made in view of such a situation, and an object of this invention is to provide the heating apparatus which can determine the normal connection of a heating circuit and a storage tank reliably.

  The heating apparatus according to the present invention comprises a storage tank for storing a heat medium, a tank circulation passage connecting the upper part and the lower part of the storage tank, and a heat medium in the storage tank via the tank circulation passage. A tank circulation pump for circulating from the lower part to the upper part, a heat pump for heating a heat medium flowing through the tank circulation path, a heating circulation path connecting the upper part and the lower part of the storage tank via a heating terminal, A heating circulation pump for circulating the heat medium in the storage tank from the upper part to the lower part of the storage tank via the heating circuit, and an aid for heating the heat medium flowing through the heating circuit on the upstream side of the heating terminal In the normal connection state, the upstream side of the heating portion of the heating circuit by the auxiliary heat source is connected to the upper portion of the storage tank, and the downstream side of the heating terminal of the heating circuit is the storage. In the heating apparatus connected to the lower part of the tank, a tank temperature detection means for detecting the temperature of the heat medium in the storage tank, and the heating on the upstream side of the heating location by the auxiliary heat source of the heating circuit. Heating circuit temperature detection means for detecting the temperature of the heat medium in the circulation path, and when the heating circulation pump is driven in a state where the temperature detected by the tank temperature detection means is a temperature at which heat is released at the heating terminal If the temperature detected by the heating circuit temperature detection means is higher than a subtraction temperature obtained by subtracting a predetermined temperature from the temperature detection by the tank temperature detection means, the normal connection determination means determines that the normal connection state exists and notifies , And.

  According to the present invention, when the heating circulation pump is driven in a state where the temperature detected by the tank temperature detection means becomes a temperature (for example, 80 ° C.) at which heat is released at the heating terminal The temperature of the heat medium supplied from the upper part of the storage tank to the heating circuit is detected by the heating circuit temperature detecting means before the heat medium reaches the heating terminal. Therefore, the temperature detected by the tank temperature detecting means and the temperature detected by the heating circuit temperature detecting means are substantially the same (about 80 ° C.), or the temperature detected by the heating circuit temperature detecting means is slightly (eg, 2 ° C.) Degree) lower. On the other hand, at the time of incorrect connection, the temperature of the heat medium supplied from the lower part of the storage tank to the heating circuit is detected by the heating circuit temperature detection means after the heat medium dissipates heat via the heating terminal (e.g. ° C). Therefore, the temperature detected by the heating circuit temperature detection means (60 ° C.) is equal to or less than the subtraction temperature (75 ° C.) obtained by subtracting a predetermined temperature (eg 5 ° C.) from the temperature detected by the tank temperature detection means (80 ° C.) It becomes. Focusing on this point, the normal connection determination means determines that the normal connection state is established if the temperature detected by the heating circuit temperature detection means is higher than the subtraction temperature obtained by subtracting the predetermined temperature from the temperature detected by the tank temperature detection means. Since the notification is made, the normal connection between the auxiliary heat source and the storage tank can be reliably determined and notified.

  Further, it is preferable that the heating circuit temperature detection means be provided at a position lower than a connection portion between the heating circuit and the upper part of the storage tank.

  According to this configuration, the heat transfer path temperature detection means is affected by the heat transfer from the upper portion of the storage tank through the heating circuit, and the connection portion between the heating path and the upper portion of the storage tank is It can be reduced compared to one provided at a higher position.

  Furthermore, it is preferable that the normal connection determination unit determines that the normal connection state is established when a time in which the temperature detected by the heating circuit temperature detection unit is higher than the subtraction temperature continues for a predetermined time period. .

  According to this configuration, the normal connection determination unit determines that the normal connection state is established when a time period in which the temperature detected by the heating circuit temperature detection unit is higher than the subtraction temperature continues for a predetermined time, the heating circuit When the temperature detected by the temperature detection means becomes higher than the above-mentioned subtraction temperature, it is immediately determined that the connection state is normal, and no notification is given. Therefore, if the temperature detected by the heating circuit temperature detection means is higher than the above subtraction temperature due to a sudden change in environment or situation, etc. instead of the normal connection, it is determined that the normal connection state is established and notified. Can be prevented.

  Preferably, the predetermined time is determined based on a capacity of the storage tank from an upper portion of the storage tank to the tank temperature detection means and a flow rate of the heat medium.

  According to this configuration, by determining the predetermined time based on the capacity of the storage tank from the upper part of the storage tank to the tank temperature detection means and the flow rate of the heat medium, the time required for the determination of the normal connection state is necessary minimum It can be limited.

The system configuration figure of the heating device of this embodiment. The figure which shows the control content in antifreeze control. The flowchart which shows the flow of the process which determines the connection state of a storage tank and a combustion type heat-source equipment unit. The system configuration figure of the heating device in the state where the storage tank and the combustion type heat source unit were incorrectly connected.

  As shown in FIG. 1, the heating device 1 of the present embodiment includes a storage tank unit 2 equipped with a storage tank 11 for storing a warm antifreeze fluid (hereinafter referred to as a hot fluid) as a heating medium for heating, and A heat pump unit 3 equipped with a heat pump 31 for liquid heating, a combustion type heat source unit 4 equipped with a combustion type heat source machine 41 as an auxiliary heat source unit for warm liquid heating, and one or more heating terminals And a heating terminal unit 5.

  In the storage tank 11, the heat storage hot liquid circulation outward path 12a and the heat storage hot liquid circulation return path for circulating the hot liquid in the storage tank 11 via the condenser 35 (details will be described later) of the heat pump 31 outside 12b, an upstream heating warm liquid circulation outward path 13a and a downstream heating warm liquid circulation return path 13d for circulating the warm liquid in the storage tank 11 via the combustion type heat source unit 4 and the heating terminal unit 5; Is connected.

  A downstream heating fluid circulation outbound passage 13b is connected to the upstream heating fluid circulation outbound route 13a, and an upstream heating fluid circulation return pathway 13c is connected to the downstream heating fluid circulation return passage 13d. There is. These connections are made manually by the installer after installation of the heating device 1.

  Further, the temperature of the warm liquid in the storage tank 11 at each height position is stored in the storage tank 11 at a plurality of (three in the illustrated example) height positions spaced in the height direction (vertical direction). The temperature sensors 14a, 14b and 14c (tank temperature detection means) to be detected are mounted.

  The heat storage liquid circulation forward path 12 a sends the liquid from the storage tank 11 to the condenser 35 of the heat pump 31. The heat storage liquid circulation return passage 12 b circulates the liquid from the condenser 35 described later to the storage tank 11.

  The upstream end of the heat storage liquid circulation forward path 12 a is connected to the lower part of the storage tank 11, and the downstream end is connected to the condenser 35. The thermal fluid circulation forward passage 12a includes a check valve 15, a temperature sensor 16 for detecting the temperature of the thermal fluid flowing out of the storage tank 11 at the upstream portion of the thermal fluid circulation forward passage 12a, and a manual system. The temperature of the warm fluid flowing into the condenser 35 of the heat pump 31 is stored for the heat storage circulation pump 18 which generates the flow of warm fluid from the upstream side to the downstream side of the thermal fluid circulation forward passage 12a. A temperature sensor 19 to be detected at the downstream portion of the warm liquid circulation forward path 12a is mounted.

  In this case, in the example of the present embodiment, the check valve 15 and the temperature sensor 16 are disposed in the storage tank unit 2, the heat storage circulation pump 18 and the temperature sensor 19 are disposed in the heat pump unit 3, and the on-off valve 17 is It is disposed between the storage tank unit 2 and the heat pump unit 3.

  An upstream end of the heat storage liquid circulation return path 12 b is connected to the condenser 35 of the heat pump 31, and a downstream end is connected to the upper portion of the storage tank 11. Then, the temperature sensor 20 for detecting the temperature of the warm liquid flowing out of the condenser 35 at the upstream portion of the thermal fluid circulation return passage 12b for heat storage, the manual open / close valve 21, and the storage for the thermal fluid circulation return passage 12b A temperature sensor 22 is mounted to detect the temperature of the hot fluid flowing into the tank 11 at the downstream portion of the thermal fluid circulation return path 12b.

  In this case, in the example of the present embodiment, the temperature sensor 20 is disposed in the heat pump unit 3, the temperature sensor 22 is disposed in the storage tank unit 2, and the on-off valve 21 is between the storage tank unit 2 and the heat pump unit 3. Is located in

  The upstream heating fluid circulation forward passage 13 a and the downstream heating fluid circulation outward passage 13 b send the hot fluid from the storage tank 11 to the heating terminal unit 5. The upstream heating warm liquid circulation return path 13 c and the downstream heating warm liquid circulation return path 13 d circulate the hot liquid from the heating terminal unit 5 to the storage tank 11.

  The upstream heating fluid circulation forward passage 13a is a circulation passage on the upstream side of the heating location by the combustion type heat source device 41, and the upstream end thereof is joined to the downstream end of the heat storage fluid circulation return passage 12b. . Accordingly, the upstream end of the upstream heating hot liquid circulation forward path 13a is connected to the upper portion of the storage tank 11 via the downstream end of the heat storage hot liquid circulation return path 12b.

  The downstream end of the downstream heating hot liquid circulation return path 13 d is connected to the lower part of the storage tank 11. In addition, a distribution valve 23 installed in the storage tank unit 2 is attached to the downstream portion of the downstream heating hot liquid circulation return path 13d.

  Furthermore, a bypass that allows the downstream portion of the downstream heating hot liquid circulation return path 13d and the upstream portion of the upstream heating hot liquid circulation forward path 13a to communicate via the distribution valve 23 without passing through the storage tank 11 A flow passage 24 is provided.

  In the present embodiment, the distribution valve 23 has two outlet ports, and the flow rate of the warm fluid flowing out from one outlet port of the two outlet ports out of the warm fluid flowing in from the inlet port, and the other It is a valve that can variably control the ratio of the flow rate of the warm liquid to be discharged from the outlet port.

  Then, the distribution valve 23 has its inlet port in communication with the upstream side of the downstream heating hot liquid circulation return path 13d, and one outlet port in communication with the downstream side of the downstream heating hot liquid circulation return path 13d, The bypass side flow path 24 is connected to the downstream side heating hot liquid circulation return path 13 d so that the other outlet port communicates with the upstream side heating hot liquid circulation forward path 13 a via the bypass flow path 24. It is connected.

  Therefore, by controlling the distribution valve 23 by the tank control unit 72, which will be described later, provided in the storage tank unit 2, the storage tank unit is composed of the upstream heating fluid circulation return passage 13c and the downstream heating fluid circulation return passage 13d. Allowing part or all of the hot liquid returned to 2 to be circulated to the upstream heating hot liquid circulation outward path 13a without passing through the storage tank 11 from the distribution valve 23 (via the bypass flow path 24) Is possible.

  In addition, the distribution valve 23 may be interposed at the connection point between the bypass flow passage 24 and the upstream heating fluid circulation forward passage 13a.

  In the following description, all the hot fluid flowing into the inlet port of the distribution valve 23 flows out from one outlet port communicating with the downstream side of the downstream heating warm fluid circulation return passage 13d (bypass channel 24 side) Fully closed, and the outlet port on the storage tank 11 side fully open), the bypass valve of the distribution valve 23 is OFF, and all the warm liquid flowing into the inlet port of the distribution valve 23 is the bypass channel 24. In the operating state of flowing out from the other outlet port in communication (operating state in which the outlet port on the bypass flow path 24 side is fully open and the outlet port on the storage tank 11 side is fully closed) A state in which a part of the hot fluid flowing into the 23 inlet ports flows out of each of the two outlet ports is referred to as a bypass intermediate state of the distribution valve 23.

  In addition, two temperature sensors 25 and 26 (heating circulation path temperature detection means) are mounted in the storage tank unit 2 on the upstream heating fluid circulation forward passage 13a, and the downstream heating fluid circulation return passage 13d One temperature sensor 27 is mounted in the storage tank unit 2.

  The temperature sensor 25 is a sensor for detecting the temperature of the hot fluid flowing from the storage tank 11 (or the thermal fluid circulation return passage 12b) to the upstream heating fluid circulation outward passage 13a, and the upstream heating fluid circulation outward passage 13a are mounted on the upstream side of the merging point of the bypass flow path 24.

  The temperature sensor 26 is a sensor for detecting the temperature of the warm liquid sent from the storage tank unit 2 to the heating terminal unit 5 side, and from the merging point of the bypass flow path 24 in the warm water circulation forward path 13a on the upstream side. Also attached to the downstream part. The detected temperature of the temperature sensor 26 matches or substantially matches the detected temperature of the temperature sensor 25 in the bypass OFF state of the distribution valve 23.

  On the other hand, in the bypass ON state or bypass intermediate state of the distribution valve 23, the temperature detected by the temperature sensor 26 is the temperature flowing from the storage tank 11 (or the heat storage liquid circulation return path 12b) into the upstream heating liquid circulation forward path 13a. The temperature (temperature lower than the temperature detected by the temperature sensor 25) of the warm liquid after mixing all or part of the warm liquid returned from the heating terminal unit 5 side to the storage tank unit 2 is the liquid.

  The temperature sensor 27 mounted on the downstream heating fluid circulation return path 13d is a sensor for detecting the temperature of the warm fluid returned from the heating terminal unit 5 side to the storage tank unit 2, and the downstream heating fluid circulation The return path 13d is mounted on the upstream side of the distribution valve 23.

  The heat pump unit 3 is a unit installed outdoors. The heat pump 31 mounted on the heat pump unit 3 is a heat source machine for heating the hot liquid in the storage tank 11 of the storage tank unit 2.

  The heat pump 31 has a known structure, and a refrigerant circulation channel 32 for circulating a refrigerant such as hydrofluorocarbon (HFC) or a refrigerant such as carbon dioxide, and an evaporation refrigerant attached to the refrigerant circulation channel 32. 33, a compressor 34, a condenser 35, and an expansion mechanism 36, and a rotating fan 37 for supplying the evaporator 33 with the open air (air).

  The evaporator 33 exchanges heat between the refrigerant flowing through the refrigerant circulation flow path 32 and the outside air (air) supplied by the rotation of the rotary fan 37.

  The compressor 34 compresses the refrigerant supplied from the evaporator 33 to generate a high temperature / high pressure refrigerant.

  As described above, the downstream end of the heat storage liquid circulation forward path 12 a and the upstream end of the heat storage liquid circulation return path 12 b are connected to the condenser 35.

  Then, the condenser 35 includes the high temperature / high pressure refrigerant supplied from the compressor 34 and the hot liquid supplied from the storage tank 11 via the thermal storage hot liquid circulation outward path 12 a by the operation of the thermal storage circulation pump 18. Heat exchange is performed to heat the hot liquid, and the heated hot liquid is circulated to the storage tank 11 via the heat storage liquid circulation return path 12b.

  The expansion mechanism 36 is configured by an expansion valve or the like, and further cools the refrigerant after heat release supplied from the condenser 35 by adiabatically expanding, and delivers the refrigerant after the cooling to the evaporator 33.

  By the operation of the evaporator 33, the compressor 34, the condenser 35, and the expansion mechanism 36 described above, the warm liquid supplied from the storage tank 11 to the condenser 35 is heat exchanged and heated, and the heated liquid after heating is It is returned to the storage tank 11. Thereby, the warm liquid in the storage tank 11 is heated, and the warm liquid is stored.

  In the heating terminal unit 5, in the present embodiment, the high temperature side heating terminal 5H having a relatively high warm liquid temperature necessary for operation and the low temperature side heating having a low warm liquid temperature necessary for operation lower than the high temperature side heating terminal 5H And a terminal 5L.

  The high temperature side heating terminal 5H is, for example, a bathroom heating device or the like, and the hot liquid temperature required by the high temperature side heating terminal 5H is, for example, about 80.degree. Further, the low temperature side heating terminal 5L is, for example, a floor heating apparatus, and the temperature of the warm liquid requested by the low temperature side heating terminal 5L is, for example, about 60 ° C.

  The high temperature side heating terminal 5H and the low temperature side heating terminal 5L are respectively connected to hot liquid flow paths 42H and 42L described later so that the hot liquid is supplied from the combustion type heat source unit 4. Further, the high temperature side heating terminal 5H and the low temperature side heating terminal 5L are connected in parallel to the upstream end of the upstream heating warm liquid circulation return path 13c so as to circulate the warm liquid radiated by each to the storage tank unit 2. It is connected to the.

  In addition, in the operation stop state of each of the high temperature side heating terminal 5H and the low temperature side heating terminal 5L, the inflow of the warm liquid from the combustion type heat source unit 4 is blocked by a valve (not shown).

  In FIG. 1, the high temperature side heating terminal 5H and the low temperature side heating terminal 5L are representatively described one by one, but only one of the high temperature side heating terminal 5H and the low temperature side heating terminal 5L May be provided in the heating device 1.

  A plurality of high temperature side heating terminals 5 H or low temperature side heating terminals 5 L may be provided in the heating device 1. The plurality of high temperature side heating terminals 5H are connected in parallel to a hot liquid flow channel 42H described later on the upstream side. Similarly, a plurality of low-temperature side heating terminals 5L are connected in parallel to an upstream high-temperature liquid flow passage 42L for low-temperature side heating described later.

  The combustion-type heat source unit 4 is a combustion-type heat source unit according to need, using the combustion-type heat source unit 41, the upstream heating warm liquid circulation outward passage 13a and the downstream heating warm liquid circulation outward passage 13b. It is a flow path for heating by 41 and supplying to the heating terminal unit 5, and is provided with a heating liquid flow path 42 continuing on the downstream side of the downstream heating liquid circulation forward path 13b. In the present embodiment, the upstream heating fluid circulation forward passage 13a, the downstream heating fluid circulation outward passage 13b, the upstream heating fluid circulation return passage 13c, the downstream heating fluid circulation return passage 13d, and the heating fluid The flow path 42 constitutes the heating circuit of the present invention.

  The combustion type heat source unit 41 includes a burner 44 for burning fuel, and a main heat exchanger 45 and an auxiliary heat exchanger 46 for heating a warm liquid by heat generated by the combustion operation of the burner 44.

  The fuel burned by the burner 44 is, for example, a fuel gas such as a city gas or an LP gas. During the combustion operation of the burner 44, fuel gas is supplied to the burner 44 via a fuel supply mechanism provided with an electromagnetic on-off valve, a proportional valve, and the like (not shown). Also, combustion air is supplied to the burner 44 by a fan (not shown). Then, the fuel gas supplied to the burner 44 is ignited by an igniter such as an igniter not shown, whereby the combustion operation of the burner 44 is performed.

  The configuration of the fuel supply mechanism or the like involved in the combustion operation of the burner 44 may be a known one. Further, the burner 44 may burn not only fuel gas but also liquid fuel such as kerosene.

  The main heat exchanger 45 is a sensible heat absorption type heat exchanger which absorbs sensible heat from the combustion exhaust of the burner 44 and heats the hot liquid by the sensible heat. In addition, the auxiliary heat exchanger 46 absorbs the latent heat when the water vapor in the combustion exhaust gas that has passed through the main heat exchanger 45 condenses, and the latent heat absorption type auxiliary heat exchanger heats the warm liquid by the latent heat. It is.

  The combustion type heat source machine 41 may be provided with only the main heat exchanger 45 of the main heat exchanger 45 and the auxiliary heat exchanger 46.

  The heating warm liquid flow passage 42 is communicated at its upstream end with the downstream end of the downstream heating warm liquid circulation outward passage 13 b so that the warm liquid flowing through the downstream heating warm liquid circulation outward passage 13 b flows in It has become.

  The upstream end of the heating liquid flow passage 42 is also connected to an expansion tank (not shown) that absorbs the volume increase of the high temperature liquid.

  The heating hot liquid flow channel 42 is configured to pass through the auxiliary heat exchanger 46 of the combustion type heat source machine 41 in the combustion type heat source unit 4, and further downstream of the auxiliary heat exchanger 46, It is divided into the high temperature side heating hot liquid flow channel 42H and the low temperature side heating hot liquid flow channel 42L.

  The high temperature side heating hot liquid flow passage 42 H is a hot liquid flow passage for supplying the hot liquid to the high temperature side heating terminal 5 H of the heating terminal unit 5. The high temperature side heating hot liquid flow channel 42H is flowed through the main heat exchanger 45 of the combustion type heat source machine 41, and the high temperature side heating terminal 5H is connected to the downstream end thereof.

  The low temperature side heating liquid flow channel 42 L is a liquid flow channel for supplying the liquid to the low temperature heating terminal 5 L of the heating terminal unit 5. The low temperature side heating terminal 5L is connected to the downstream end of the low temperature side heating liquid flow channel 42L.

  In the heating liquid flow passage 42, a heating circulation pump 51 for generating a flow of liquid flowing from the upstream side to the downstream side of the heating liquid flow passage 42 is used for high temperature side heating of the heating liquid flow passage 42. It is mounted on the upstream side of the branch point to the warm liquid flow passage 42H and the low temperature side heating warm liquid flow passage 42L.

  In addition, a temperature sensor for detecting the temperature of the hot fluid flowing into the high temperature side heating hot liquid flow path 42H from the main body heating hot liquid flow path 42 upstream of the high temperature side heating hot liquid flow path 42H 54 and a temperature sensor 55 for detecting the temperature of the hot fluid flowing out of the main heat exchanger 45 are attached.

  In the example of the present embodiment, the temperature sensor 54 is disposed at a position near the upstream end of the high temperature side heating hot liquid flow channel 42 H, and the temperature sensor 55 is located near the main heat exchanger 45. Is located downstream of the

  Note that the temperature detected by the temperature sensor 54 is, in other words, the temperature of the warm liquid supplied to the low temperature side heating terminal 5L, and the temperature detected by the temperature sensor 55 is, in other words, the high temperature side heating terminal It is the temperature of the hot liquid supplied to 5H.

  The upstream end of the freeze prevention channel 61 is connected to the low temperature side heating warm liquid flow channel 42L. The freeze prevention channel 61 is for sending hot liquid to the heat pump 31 to prevent the heat pump 31 from freezing, and the downstream end is connected to the thermal liquid circulation forward path 12a for heat storage .

  An on-off valve 62 is attached to the freeze prevention channel 61. The on-off valve 62 is controlled by the on-off valve control unit 63.

  In the heating device 1 of the present embodiment, the storage tank unit 2 includes the tank control unit 72, the heat pump unit 3 includes the pump control unit 73, and the combustion heat source unit 4 includes the combustion control unit 74. ing.

  Each of the control units 72 to 74 includes a control circuit unit and a power supply circuit unit, although detailed illustration is omitted. Each control circuit unit is a circuit unit configured by a CPU, a RAM, a ROM, and the like, and can mutually communicate.

  The control circuit unit of the tank control unit 72 of the storage tank unit 2 detects the detection data of the temperature sensors 14a, 14b, 14c, 16, 22, 25, 26, 27 provided in the storage tank unit 2, or the heat pump unit The program processing is executed based on communication data or the like given from the control circuit unit of the combustion heat source unit 4 or 3 to control the operation of the distribution valve 23.

  Further, the control circuit unit of the pump control unit 73 of the heat pump unit 3 is from the detection data of the temperature sensors 19 and 20 provided in the heat pump unit 3 or the control circuit unit of the storage tank unit 2 or the combustion type heat source unit 4 By executing the program processing based on the given communication data and the like, the operation of the heat storage circulation pump 18, the rotation fan 37, the compressor 34 and the like is controlled.

  Further, the heat pump unit 3 is provided with an outside air temperature sensor (not shown) for detecting the outside air temperature, and the outside air temperature data detected by the outside air temperature sensor is sent to the control circuit unit of the pump control unit 73.

  The control circuit unit of the combustion control unit 74 of the combustion type heat source unit 4 detects data detected by the temperature sensors 54 and 55 provided in the combustion type heat source unit 4 or instruction data given from a remote controller (not shown) Program processing is executed based on the instruction data to be performed) or the communication data etc. given from the control circuit unit of the storage tank unit 2 or the heat pump unit 3, thereby the combustion type heat source machine 41 or the heating circulation pump 51 Control the operation of

  The control circuit units of the control units 72 to 74 may be configured by one circuit board.

  The power supply circuit units of the control units 72 to 74 are respectively actuators (distribution valve 23 etc.) of the storage tank unit 2, electronic devices (heat storage circulation pump 18, compressor 34, rotation fan 37 etc.) of the heat pump unit 3. ), And a circuit unit for supplying power to each actuator (heating circulation pump 51 etc.) of the combustion type heat source unit 4.

  In this case, in the heating device 1 of the present embodiment, the power supply circuit unit of the tank control unit 72 of the storage tank unit 2 and the power supply circuit unit of the pump control unit 73 of the heat pump unit 3 Power is supplied.

  Further, in the present embodiment, a part of the snow melting power supplied to the power supply circuit unit of the tank control unit 72 of the storage tank unit 2 is used as the power supply power for the operation of electrical components such as the distribution valve 23 of the storage tank unit 2. It is used.

  Further, normal household power or commercial power (hereinafter, referred to as normal power) is supplied to the power supply circuit unit of the combustion control unit 74 of the combustion type heat source unit 4.

  Next, the operation of the heating device 1 of the present embodiment will be described.

  In the state where snow melting power is supplied to the tank control unit 72 of the storage tank unit 2 and the pump control unit 73 of the heat pump unit 3, the heat storage circulation pump 18 and the heat pump 31 are controlled by control processing of the control circuit unit of the pump control unit 73. Driving is performed.

  Thereby, the warm liquid in the storage tank 11 is heated to a predetermined temperature (for example, about 80 ° C.) while being circulated through the heat storage liquid circulation forward path 12 a and the heat storage hot liquid circulation return path 12 b via the condenser 35. The heat storage in the storage tank 11 is performed.

  On the other hand, when it is instructed that the heating operation of the high temperature side heating terminal 5H or the low temperature side heating terminal 5L is performed by the remote control, the combustion control of the tank control unit 72 of the storage tank unit 2 and the combustion type heat source unit 4 The heating operation is performed by the control process of one control circuit unit of the unit 74 or the control process of cooperation of both control circuit units. When the combustion type heat source device 41 and the heating circulation pump 51 are operated, the control circuit unit of the combustion control unit 74 transmits combustion operation data indicating that to the on-off valve control unit 63.

  Specifically, the heating operation when the heat pump 31 is operable is performed as follows.

  First, a heating set temperature which is a target temperature of the warm liquid (heating medium) to be supplied to the heating terminal unit 5 is set. In the present embodiment, the heating request temperature of the heating terminal having the highest heating request temperature (the temperature of the warm liquid required for the heating operation) among the heating terminals 5H and 5L instructed to perform the heating operation Is set as the heating set temperature.

  Therefore, for example, heating of both the high temperature side heating terminal 5H such as a bathroom heating device having a heating request temperature of 80 ° C. and the low temperature side heating terminal 5L such a floor heating device having a heating request temperature of 60 ° C. When it is instructed to perform the operation or when it is instructed to perform the heating operation of only the high temperature side heating terminal 5H, the heating set temperature is set to 80 ° C.

  Further, for example, when it is instructed to perform the heating operation of only the low-temperature side heating terminal 5L, the heating set temperature is set to 60 ° C.

  In addition, when the priority of operation of heating terminal 5H, 5L is separately designated by the user etc., the heating request temperature of the highest priority heating terminal is set as the heating set temperature. May be In that case, even if it is instructed that both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L perform heating operation, the heating request temperature for the low temperature side heating terminal 5L (60 ° C) may be set as the heating set temperature.

  Thus, with the heating set temperature set, the heating circulation pump 51 of the combustion type heat source unit 4 is operated, and the heating liquid circulation forward passages 13a and 13b and the heating liquid circulation return passages 13c and 13d Distribution of hot liquid is performed. Further, the distribution valve 23 is maintained in the bypass OFF state or the bypass intermediate state.

  The warm liquid supplied from the storage tank unit 2 to the combustion type heat source unit 4 flows from the downstream side heating warm liquid circulation outward path 13 b into the main heating liquid passage 42 of the combustion type heat source unit 4. Then, when the high temperature side heating terminal 5H is operated, the hot liquid is supplied to the high temperature side heating terminal 5H from the main heating liquid flow passage 42 via the high temperature side heating liquid flow passage 42H. Further, when the low temperature side heating terminal 5L is in operation, the warm liquid is supplied to the low temperature side heating terminal 5L via the low temperature side heating liquid flow channel 42L from the main heating temperature liquid flow passage 42.

  During the operation of both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L, the main heating liquid flow channel 42 to the high temperature side heating liquid flow channel 42H and the low temperature side heating liquid flow channel 42L The hot fluid is supplied to both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L via each of the above.

  At this time, in the combustion type heat source unit 4, the temperature of the warm liquid (the temperature detected by the temperature sensors 54, 55) supplied from the heating warm liquid flow path 42 to the heating terminal unit 5 is set to the heating set temperature. The combustion type heat source unit 41 is maintained in the shutdown state (the state where the combustion operation of the burner 44 is not performed) when the values substantially match within the allowable range of

  On the other hand, if the temperature (temperature detected by the temperature sensors 54 and 55) of the warm liquid supplied from the warm liquid flow path 42 for heating to the heating terminal unit 5 side is lower than the heating set temperature outside the predetermined allowable range. In the high temperature side heating warm liquid flow passage 42H to the high temperature side heating terminal 5H (temperature detected by the temperature sensor 55) supplied to the high temperature side heating terminal 5H or low temperature side heating warm liquid flow passage 42L the low temperature side heating terminal The combustion operation of the burner 44 of the combustion type heat source machine 41 is performed such that the temperature of the warm liquid supplied to the machine 5L (the temperature detected by the temperature sensor 54) substantially matches the heating set temperature within the predetermined allowable range. .

  In this case, the detected temperature of the temperature sensor 55 is within the predetermined allowable range during heating operation of only the high temperature side heating terminal 5H or in operation of both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L. The amount of combustion of the burner 44 is controlled to substantially match the heating set temperature. Further, during the heating operation of only the low temperature side heating terminal 5L, the amount of combustion of the burner 44 is controlled such that the detected temperature of the temperature sensor 54 substantially matches the heating set temperature within the predetermined allowable range.

  As described above, without heating the warm liquid supplied from the storage tank unit 2 side by the combustion operation of the burner 44, the heating terminal 5H performs the heating operation with the warm liquid that matches or almost matches the heating set temperature, In the situation where 5L can be supplied, the warm liquid supplied from the storage tank unit 2 side is supplied as it is to the heating terminal performing the heating operation of the heating terminals 5H and 5L.

  In addition, when the temperature of the warm liquid supplied from the storage tank unit 2 side is lower than the predetermined allowable range with respect to the heating set temperature, the burnout operation of the burner 44 of the combustion type heat source machine 41 An amount of heat is added to the hot liquid. Then, the warm liquid thus heated to a temperature that matches or almost matches the heating set temperature is supplied to the heating terminal that performs the heating operation among the heating terminals 5H and 5L. Be done.

  The warm liquid thus supplied to one or both of the heating terminals 5H and 5L is supplied from the heating terminals 5H and 5L to the heating liquid circulation return passages 13c and 13d and the bypass flow path 24 or the storage tank. It is circulated to the upstream heating fluid circulation forward passage 13 a via 11.

  The above is the operation of the heating operation when the heat pump 31 is operable.

  Next, the heating operation in the state where the heat pump 31 is inoperable (the supply stop period of the snow melting power) is performed as follows.

  First, the heating set temperature is set as in the case of the heating operation in the case where the heat pump 31 is operable.

  Further, the distribution valve 23 is maintained in the bypass ON state (a state in which the outlet port on the bypass flow path 24 side of the distribution valve 23 is fully open and the outlet port on the storage tank 11 side is fully closed). That is, the whole amount of the warm liquid returned to the storage tank unit 2 through the downstream side heating hot liquid circulation return path 13d does not pass through the storage tank 11, but from the distribution valve 23 through the bypass flow path 24 on the upstream side The distribution valve 23 is controlled to circulate around the heating liquid circulation path 13a.

  Here, in the present embodiment, since snow melting power is used as power supply power for operating the distribution valve 23, the distribution valve 23 can not be operated in a state where the supply of the snow melting power is interrupted. However, in the present embodiment, when the heat pump 31 can not be operated due to the supply stop of the snow melting power, the supply of the snow melt power is performed before the time when the supply stop actually starts. In this state, the distribution valve 23 is controlled to the bypass ON state.

  Note that after the distribution valve 23 is controlled to be in the bypass ON state, the distribution valve 23 is maintained in the bypass ON state even if the supply of the snow melting power is interrupted.

  As described above, the heating circulation pump 51 is operated in a state where the distribution valve 23 is controlled to be in the bypass ON state, and the upstream heating warm liquid circulation outward path 13a, the downstream heating warm liquid circulation outward path 13b, and the upstream heating warmth The circulation of the hot fluid is performed in the bypass flow path 24 and the fluid circulation return path 13c and the downstream side heating hot liquid circulation return path 13d (excluding the flow path on the storage tank 11 side with respect to the bypass flow path 24).

  The warm liquid supplied to the combustion type heat source unit 4 in the upstream heating warm liquid circulation outward path 13a and the downstream heating warm liquid circulation outward path 13b is the same as the heating operation when the heat pump 31 is operable. Flows from the downstream heating fluid circulation forward passage 13b into the main heating fluid channel 42 of the combustion type heat source unit 4, and further, the high temperature heating fluid flow 42H and the low temperature heating fluid flow The heating terminals 5H and 5L are supplied to one or both of the heating terminals 5H and 5L via one or both of the paths 42L.

  At this time, in the combustion type heat source unit 4, the temperature (the temperature detected by the temperature sensor 55) of the warm liquid supplied to the high temperature side heating terminal 5H in the high temperature side heating warm liquid flow path 42H or the low temperature side heating temperature The combustion type heat source machine 41 so that the temperature of the warm liquid (the temperature detected by the temperature sensor 54) supplied to the low temperature side heating terminal 5L in the liquid flow path 42L (the detected temperature of the temperature sensor 54) substantially matches the heating set temperature within the predetermined allowable range. The combustion operation of the burner 44 is performed.

  In this case, the detected temperature of the temperature sensor 55 is within the predetermined allowable range during heating operation of only the high temperature side heating terminal 5H or in operation of both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L. The amount of combustion of the burner 44 is controlled to substantially match the heating set temperature. Further, during the heating operation of only the low temperature side heating terminal 5L, the amount of combustion of the burner 44 is controlled such that the detected temperature of the temperature sensor 54 substantially matches the heating set temperature within the predetermined allowable range.

  As described above, in the heating operation in the state where the heat pump 31 is inoperable (supply stop period of snow melting power), the distribution valve 23 is controlled to the bypass ON state, and the heating terminal unit 5 is supplied with Temperature control is performed by controlling the combustion operation of the burner 44 of the combustion type heat source machine 41.

  The above is operation | movement of heating operation in the state (supply stop period of snow melting electric power) which the heat pump 31 can not operate.

  In the state where the heat pump 31 can not be operated, the warm liquid in the storage tank 11 can not be appropriately heated by the heat pump 31, so the warm liquid in the storage tank 11 is eventually released from the heating set temperature by natural heat radiation or the like. It also drops to a lower temperature.

  Under such circumstances, if the warm liquid for heating operation is circulated via the storage tank 11, the warm liquid returned from the heating terminal unit 5 to the storage tank unit 2 cools in the storage tank 11 By heat exchange with the warm liquid, the heat is dissipated wastefully, and the heat loss of the warm liquid increases.

  However, in the present embodiment, when the hot liquid in the storage tank 11 is cooled, the hot liquid returning from the heating terminal unit 5 to the storage tank unit 2 does not pass through the storage tank 11 and the bypass flow path 24 , And then supplied to the combustion heat source unit 4 side.

  For this reason, the heat loss of the heating liquid in the storage tank unit 2 is minimized while minimizing the heat radiation of the heating liquid circulating through the combustion type heat source unit 4 and the heating terminal unit 5 in the storage tank unit 2. Can be reduced. As a result, the amount of combustion of the burners 44 of the combustion type heat source unit 4 can be suppressed.

  Next, the antifreeze control of the heat pump 31 will be described.

  In general, the snow melting power supplied to the storage tank unit 2 and the heat pump unit 3 is stopped for a certain period of time (for example, 2 hours) of a day. In that state, the operation of the heat pump 31 is stopped.

  The control circuit unit of the pump control unit 73 previously holds, in a memory (not shown), data indicating a supply schedule indicating at which time zone of the day snow melting power is supplied and at which time period supply is stopped. ing. The control circuit unit of the pump control unit 73 determines that the current time in the clock unit (not shown) is the snow melting power supply stop time in the snow melting power supply schedule, and the operation of the heat pump 31 is stopped, The snow melting power supply stop data indicating that is transmitted to the on-off valve control unit 63. In addition, the distribution valve 23 is controlled to be in the bypass ON state in a state where the snow melting power is provided prior to the time when the supply stop actually starts, and the bypass ON state is set even if the snow melting power is stopped. Maintained.

  The on-off valve control unit 63 controls the on-off valve 62 to be in a closed state when the snow melting power supply stop data is not received. When the on-off valve control unit 63 receives the snow melting power supply stop data, the on-off valve 62 is controlled to be in the open state, and the warm liquid from the low temperature side heating hot liquid flow path 42L It is sent to the downstream side of the on-off valve 62 of the passage 61, and is sent to the heat pump 31 through the heat storage liquid circulation forward passage 12a (freezing control). The hot fluid sent to the heat pump 31 passes through the heat pump 31 and is sent to the thermal fluid circulation return path 12 b for heat storage.

  In the freeze prevention control of the heat pump 31, as shown in FIG. 2, the detected temperature of the temperature sensor 19 immediately before the supply of snow melting power is stopped and the lower temperature of the detected temperatures of the outside air temperature sensor (hereinafter HP temperature) Control based on In this freeze prevention control, control is performed such that the temperature detected by the temperature sensor 19 does not fall below -10 ° C. (the temperature at which the warm liquid, which is antifreeze liquid, freezes).

  In the state where the combustion type heat source machine 41 and the heating circulation pump 51 are stopped (hereinafter referred to as the heating operation stop state), when the HP temperature> -6 ° C., the snow melting power supply stop period (2 hours) The control to keep the heating circulation pump 51 off is performed by keeping the on-off valve 62 always closed.

  In the heating operation stop state, when -9 ° C <HP temperature ≦ -6 ° C, the open / close valve 62 is opened for 10 minutes and closed for 20 minutes during the snow melting power supply stop period. This is repeated as one set, and the control to turn off the heating circulation pump 51 for 20 minutes after turning on the heating circulation pump 51 for 10 minutes according to opening and closing of the on-off valve 62 is set as one set, and control is repeated.

  In the heating operation stop state, when -12 ° C <HP temperature ≦ -9 ° C., the open / close valve 62 is opened for 10 minutes and then closed for 10 minutes during the snow melting power supply stop period. Is repeated, and the heating and circulating pump 51 is turned on for 10 minutes and then turned off for 10 minutes.

  In the heating operation stop state, when -16 ° C <HP temperature ≦ -12 ° C., the open / close valve 62 is opened for 10 minutes and then closed for 3 minutes during the snow melting power supply stop period. Is repeated, and the heating and circulating pump 51 is turned on for 10 minutes in accordance with the opening and closing of the on-off valve 62, and the control for turning off the heating for 3 minutes is performed as one set.

  In the heating operation stop state, when HP temperature ≦ −16 ° C., the on-off valve 62 is always open during the snow melting power supply stop period, and the heating circulation pump 51 is always turned on.

  In the state where the combustion type heat source machine 41 and the heating circulation pump 51 are operated (hereinafter referred to as heating operation state) and HP temperature> -6 ° C., the on-off valve 62 is constantly operated during snow melting power supply stop period Control to make it closed. In the heating operation state, the heating circulation pump 51 is always on.

  In the heating operation state, when −9 ° C. <HP temperature ≦ −6 ° C., the open / close valve 62 is opened for 10 minutes and then closed for 50 minutes during the snow melting power supply stop period. Control is made to repeat this as one set.

  In the heating operation state, when −19 ° C. <HP temperature ≦ −9 ° C., the open / close valve 62 is opened for 10 minutes and then closed for 30 minutes during the snow melting power supply stop period. Control is made to repeat this as one set.

  In the heating operation stop state, when HP temperature ≦ −19 ° C., the on-off valve 62 is opened for 10 minutes and then closed for 20 minutes during the snow melting power supply stop period as one set, Control to repeat this is performed.

  As described above, even during the snow melting power supply stop period, the heating circulation pump 51 is operated to open the on-off valve 62, thereby passing the hot liquid through the heat pump 31, so the heat pump 31 does not freeze. In addition, since the heating circulation pump 51 is not operated constantly during the snow melting power supply stop period, the heat pump 31 is intermittently operated in a range where the heat pump 31 does not freeze, so power consumption due to useless operation can be prevented.

  In addition, the temperature used as the threshold value in antifreeze control and the time of intermittent operation can be changed suitably, and are changed with the fluid used as a heat medium. For example, hot water may be used as a heat medium, and in this case, if HP temperature> 3 ° C., the on-off valve 62 is always closed in the snow melting power supply stop period (2 hours) to heat Control is performed to turn off the circulation pump 51 at all times. That is, the threshold is 9 ° C. higher than that using antifreeze.

  As shown in FIG. 3, in the heating device 1, after the installation work, a normal connection determination is performed to determine whether or not the flow path (pipe) is normally connected.

  In the normal connection determination, first, the combustion control unit 74 performs a heating operation of the low temperature side heating terminal 5L (STEP 1). In this heating operation, the combustion control unit 74 turns on the heating circulation pump 51 (STEP 2). At this time, the combustion-type heat source unit 41 operates in accordance with the temperature of the supplied warm liquid in order to perform the heating operation (warm liquid: 60 ° C.) of the low-temperature side heating terminal 5L. In addition, when performing normal connection determination by the trial run etc. after construction, it is not necessary to perform heating operation.

  The tank control unit 72 controls the distribution valve 23 to the bypass ON state, and the pump control unit 73 operates the heat storage circulation pump 18 and the heat pump 31. As a result, the warm liquid in the storage tank 11 is heated to 80 ° C. while circulating through the heat storage circulating liquid flow path 12 via the condenser 35 and heat storage of the warm liquid in the storage tank 11 (heat pump boiling) ) Is performed (STEP 3).

  When the storage tank 11 is filled with the warm liquid of 80 ° C. (“YES” in STEP 4), the combustion control unit 74 continues the heating circulation pump 51 in the on state to turn off the combustion type heat source machine 41 To do (STEP 5). If the storage tank 11 is not full of hot liquid at 80 ° C. (“NO” in STEP 4), STEP 2 is performed again. In addition, you may make it process step 5 or subsequent ones, when not a full tank but 80 degreeC warm liquid is stored by the storage tank 11 until it detects with the temperature sensor 14a.

  The tank control unit 72 controls the distribution valve 23 to the bypass OFF state, and the pump control unit 73 stops the operation of the heat storage circulation pump 18 and the heat pump 31 (STEP 6).

  Next, detected temperature data from the temperature sensors 14a, 25 and 26 are sent to the tank control unit 72, and the tank control unit 72 subtracts a predetermined temperature (for example, 5 ° C.) from the temperature detected by the temperature sensor 14a. If the temperature (hereinafter referred to as a subtraction temperature) is calculated, and the detected temperature of each of the temperature sensors 25 and 26 is higher than the subtraction temperature (“YES” in STEP 7), the duration of the state is a timer (shown in FIG. Timing, and it is determined whether or not a predetermined time (for example, 5 seconds) continues (STEP 8). Note that STEP 7 may be performed using the detected temperature of the temperature sensor 26 alone.

  If the detected temperature of each of the temperature sensors 25 and 26 is higher than the subtraction temperature for 5 seconds (“YES” in STEP 8), the tank control unit 72 determines that the piping is normally connected. The determination is made (STEP 9), and that effect is displayed on the remote control (STEP 10). In addition, you may make it perform STEP9 and STEP10, when it becomes "YES" by STEP7 without determining continuation of predetermined time (step 8 is not performed). In the present embodiment, a configuration in which the tank control unit 72 determines the normal connection between the heating hot liquid circulation paths 13a to 13d and the storage tank 11, and a remote control that displays that when the tank connection is normal. The normal connection determination means of the present invention is configured.

  In addition, the predetermined time may be determined based on the volume of the storage tank 11 from the upper part of the storage tank 11 to the temperature sensor 14a and the flow rate of the warm liquid. In this case, a flow rate sensor for detecting the flow rate of the warm liquid is attached to the upstream heating warm liquid circulation outward passage 13a. When the volume of the storage tank 11 from the upper part of the storage tank 11 to the temperature sensor 14a is Q (L: liter) and the flow rate of the warm liquid is F (L / s), the predetermined time is less than (Q / F) It is preferable to set. In the present embodiment, the capacity of the storage tank 11 is 30 L and Q is 8 L. For example, when F is 1 L / s, the predetermined time is set to less than 8 seconds, and when F is 2 L / s, the predetermined time is Set to less than 4 seconds. Further, only one of the temperature sensors 25 and 26 may be provided, and the normal connection determination may be performed using one of the detected temperatures.

  On the other hand, when at least one of the temperatures detected by the temperature sensors 25 and 26 is equal to or lower than the subtraction temperature (“NO” in STEP 7), the tank control unit 72 counts the duration of the state by the timer and For example, it is determined whether it is continuing for 60 seconds (STEP 11). When continuing for 60 seconds (“YES” in STEP 11), the tank control unit 72 determines that the pipe is incorrectly connected (STEP 12), and causes the remote control to display the effect (STEP 13). In addition, you may make it perform STEP12 and STEP13, when it becomes "NO" by STEP7 without determining continuation of predetermined time (step 11 is not performed).

  In addition, the tank control unit 72 detects that the temperature detected by each of the temperature sensors 25 and 26 is not higher than the subtraction temperature for 5 seconds (“NO” in STEP 8). If the state in which at least one of the detected temperatures is equal to or less than the subtraction temperature continues for 60 seconds (“NO” in STEP 11), STEP 7 is performed again.

  In the present embodiment, when the warm liquid of 80 ° C. is sent from the full storage tank 11 to the combustion heat source unit 4 and the piping is normally connected, the temperature in the storage tank 11 is obtained. The warm liquid (80 ° C.) whose temperature is detected by the sensor 14a is supplied to the upstream heating warm liquid circulation outward passage 13a, and the temperature is measured by the temperature sensors 25, 26 provided in the upstream heating warm liquid circulation outward passage 13a. Is detected. Therefore, the temperature detected by the temperature sensor 14 a and the temperature detected by the temperature sensors 25 and 26 become substantially the same (about 80 ° C.). That is, the detection temperature of each of the temperature sensors 25 and 26 is higher than the subtraction temperature (80 ° C.-5 ° C. = 75 ° C.). If this state continues for 5 seconds or more (“YES” in STEP 8), the tank control unit 72 determines that the pipe is normally connected, and displays that effect on the remote control.

  On the other hand, as shown in FIG. 4, when the piping is misconnected, the heat is dissipated via the high temperature side heating terminal 5H and the low temperature side heating terminal 5L, and the upstream side heating liquid Since the warm liquid (about 60 ° C.) sent from the circulation return path 13 c passes through the upstream heating hot liquid circulation outward path 13 a, the temperature detected by the temperature sensors 25 and 26 becomes about 60 ° C., and the subtraction temperature (75 ° C) It becomes below ("NO" in STEP7). If this state continues for 60 seconds (“YES” in STEP 11), the tank control unit 72 determines that the pipe is incorrectly connected, and causes the remote control to display that effect.

  In the above embodiment, although the normal connection determination is performed using the temperature detected by the temperature sensor 14a, the normal connection determination may be performed using the temperature detected by the temperature sensors 14b and 14c. In this case, the capacity (Q) of the storage tank 11 from the top of the storage tank 11 to the temperature sensor 14b is 15 L, and the capacity (Q) of the storage tank 11 from the top of the storage tank 11 to the temperature sensor 14c is 20 L. The above-mentioned predetermined time is set based on the calculated value calculated by the above formula (Q / F) using the numerical value of.

  In the said embodiment, although the flow path for antifreeze is provided, this invention can be implemented also to the heating apparatus in which the flow path for antifreeze is not provided.

  In the above embodiment, the combustion type heat source machine is driven by the normal power, but the present invention can also be implemented to a heating device provided with an electric heat source machine driven by the normal power instead of the combustion type heat source machine.

DESCRIPTION OF SYMBOLS 1 ... Heating apparatus, 2 ... Storage tank unit, 3 ... Heat pump unit, 4 ... Combustion-type heat source unit, 5H, 5L ... Heating terminal, 11 ... Storage tank, 12a ... Thermal liquid circulation outward path for heat storage, 12b ... Thermal storage Warm liquid circulation return path 12b, 13a ... upstream heating hot liquid circulation outgoing path, 13a ... downstream heating liquid warmth circulation path, 13c ... upstream heating hot liquid circulation return path, 13d ... downstream heating hot liquid circulation return path, 14a-14c, 16, 17, 19, 20, 22, 25-27 ... temperature sensor, 23 ... distribution valve, 24 ... bypass flow passage, 31 ... heat pump, 51 ... heating circulation pump, 72 ... tank control unit

Claims (4)

A storage tank for storing a heat medium,
A tank circulation path connecting the upper portion and the lower portion of the storage tank;
A tank circulation pump for circulating the heat medium in the storage tank from the lower part to the upper part of the storage tank via the tank circulation path;
A heat pump for heating a heat medium flowing through the tank circulation path;
A heating circuit connecting the upper and lower portions of the storage tank via a heating terminal;
A heating circulation pump for circulating the heat medium in the storage tank from the upper part to the lower part of the storage tank via the heating circuit;
An auxiliary heat source that heats the heat medium flowing through the heating circuit on the upstream side of the heating terminal;
In the normal connection state, the upstream side of the heating location by the auxiliary heat source of the heating circulation path is connected to the upper portion of the storage tank, and the downstream side of the heating terminal of the heating circulation path is connected to the lower portion of the storage tank In the heating device that is in the state,
Tank temperature detection means for detecting the temperature of the heat medium in the storage tank;
Heating circuit temperature detection means for detecting the temperature of the heat medium in the heating circuit on the upstream side of the heating point of the heating circuit by the auxiliary heat source;
When the heating circulation pump is driven in a state where the temperature detected by the tank temperature detection means becomes a temperature at which heat is released at the heating terminal, the temperature detected by the heating circuit path temperature detection means is obtained by the tank temperature detection means When the temperature is higher than a subtraction temperature obtained by subtracting a predetermined temperature from a detected temperature, the normal connection determination unit determines that the normal connection state is present, and notifies;
A heating device comprising: In the heating device according to claim 1,
The heating system according to claim 1, wherein the heating circuit temperature detection means is provided at a position lower than a connection between the heating circuit and an upper portion of the storage tank. In the heating device according to claim 1 or 2,
The normal connection determination means determines that the normal connection state is established and notifies when the time when the temperature detected by the heating circuit temperature detection means is higher than the subtraction temperature continues for a predetermined time. Heating system. In the heating device according to claim 3,
The heating apparatus according to claim 1, wherein the predetermined time is determined based on a volume of the storage tank from an upper portion of the storage tank to the tank temperature detection unit and a flow rate of the heat medium.