JP6530346B2 - 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. If the heating system fails, heating at the desired temperature can not be performed. Then, the technique which determines the presence or absence of a failure of a heating device is proposed (for example, patent documents 1 and 2).

  In the heating device of Patent Document 1, when the heat pump provided in the circulation path of the hot water is controlled to open and the circulation pump is operated, the flow sensor detects the flow rate of the hot water, and the heat valve is operated. If the flow rate does not increase despite the control to open the valve, it is determined that the thermal valve has failed.

  In Patent Document 2, the heat source machine sends an operation command to each of a plurality of terminal devices such as a floor heating device and a bath dryer according to a simple test request, and the heat provided in each of the circulation paths for sending warm water to each terminal device When the valve is opened, each terminal device detects a temperature, and based on the detected temperature, it is determined whether or not the thermal valve for each terminal device has a failure.

JP 2001-174058 A JP 2001-263659 A

  In the heating device that operates separately the heat pump that heats the heat medium supplied to the heating terminal and the auxiliary heat source by the power supplied from different power sources, as the heat pump freeze protection when the power supply to the heat pump is stopped An auxiliary flow path (freezing prevention flow path) for sending the heat medium from the auxiliary heat source to the heat pump is provided, and the freeze prevention flow path is provided with an on-off valve.

  In the heating device provided with the antifreeze flow path and the on-off valve, as disclosed in Patent Documents 1 and 2, the open / close valve of the antifreeze flow path based on the flow rate increase amount of the heat medium flowing through the circulation path and the detected temperature. When the open / close state abnormality determination is performed, it is necessary to provide a new flow rate sensor or temperature sensor in the antifreezing flow path for the abnormality determination.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a heating device capable of easily performing abnormality determination of the on-off valve of the antifreezing flow path without providing a new sensor. Do.

  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 heat pump for circulating heat from the lower portion to the upper portion of the storage tank, a heat pump for heating the heat medium flowing through the tank circulation path, the upper portion and the lower portion of the storage tank; A heating circulation pump communicating through a heating terminal, a heating circulation pump for circulating the heat medium in the storage tank from the top to the bottom of the storage tank via the heating circulation path, and a second power supply Auxiliary heat source that heats the heat medium flowing through the heating circulation path upstream of the heating terminal, the auxiliary flow path connecting the tank circulation path and the heating circulation path, and the auxiliary flow Road opening Provided on the downstream side of the on-off valve for performing the operation and the portion of the tank circulation path to which the auxiliary flow path is connected, and operated by the electric power supplied from the first power supply to operate the heat pump Tank circulation path temperature detection means for detecting the temperature of the heat medium in the tank circulation path used for control, power supply from the first power supply is stopped, the on-off valve is controlled to be in a closed state, and After the power supply from the first power source is started from the state where the auxiliary heat source and the heating circulation pump are operating, the temperature detected by the tank circulation passage temperature detection means is equal to or higher than the predetermined temperature. And an abnormality determining unit that determines that the on / off valve is in the open state where the control from the open state to the closed state is disabled.

  According to the present invention, when the power supply from the first power source to the heat pump is stopped, the on-off valve is controlled to be closed, and the auxiliary heat source and the heating circulation pump are operating, the on-off valve is normally closed. Since the heat medium does not flow in the auxiliary flow path if it is a valve, if the predetermined temperature is an appropriate temperature, the tank circulation path temperature detection means after the power supply from the first power source to the heat pump is performed. The detected temperature never exceeds the predetermined temperature. On the other hand, when the valve is in the open state, the heat medium flows from the heating circuit to the tank circuit through the auxiliary passage, so the temperature detected by the tank circuit temperature detecting means becomes equal to or higher than the predetermined temperature. . Focusing on this point, the abnormality judging means is an open abnormality in which the on / off valve can not be controlled from the open state to the closed state when the temperature detected by the tank circuit temperature detection means is equal to or higher than the predetermined temperature. Therefore, the open abnormality of the on-off valve can be determined without providing a flow rate sensor or a temperature sensor in the auxiliary flow path. Thereby, the opening abnormality of the on-off valve can be determined while preventing the cost increase due to the addition of the sensor.

  Preferably, the predetermined temperature is set according to the heating temperature of the heat medium by the auxiliary heat source.

  Since the predetermined temperature is set according to the heating temperature of the heat medium by the auxiliary heat source, a more appropriate predetermined temperature can be set, and the accuracy of the determination of the open abnormality of the on-off valve can be improved.

  Furthermore, it is preferable that an outside air temperature detection unit that detects the temperature of the outside air is provided, and the predetermined temperature is set according to a temperature detected by the outside air temperature detection unit.

  Since the predetermined temperature is set in accordance with the temperature detected by the outside air temperature detecting means, it is possible to set a more appropriate predetermined temperature, and it is possible to improve the accuracy of the determination of the open abnormality of the on-off valve.

  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 heat pump for circulating heat from the lower portion to the upper portion of the storage tank, a heat pump for heating the heat medium flowing through the tank circulation path, the upper portion and the lower portion of the storage tank; A heating circulation pump communicating through a heating terminal, a heating circulation pump for circulating the heat medium in the storage tank from the top to the bottom of the storage tank via the heating circulation path, and a second power supply Auxiliary heat source that heats the heat medium flowing through the heating circulation path upstream of the heating terminal, the auxiliary flow path connecting the tank circulation path and the heating circulation path, and the auxiliary flow Road opening The temperature of the heat medium in the tank circulation passage which is provided downstream of the on-off valve for performing the heat pump and the portion of the tank circulation passage to which the auxiliary passage is connected, and used for control when operating the heat pump If the temperature detected by the tank circulation path temperature detection means to be detected and the temperature detected by the tank circulation path temperature detection means is lower than the heating set temperature by the heating terminal, the on-off valve is controlled to be closed, Control means for performing determination control for operating the heating circulation pump, and after the control for determination, if the temperature detected by the tank circulation path temperature detection means is equal to or higher than the subtraction temperature set lower than the heating set temperature. And an abnormality determining unit that determines that the open / close valve is in an open state where control from the open state to the closed state is disabled.

  According to the present invention, in the state in which the on-off valve is controlled to be closed and the control for determination to operate the auxiliary heat source and the heating circulation pump is performed, if the on-off valve is normally closed, the heat medium is Since there is no circulation, the temperature detected by the tank circulation path temperature detection means does not become equal to or higher than the subtraction temperature set lower than the heating set temperature by the heating terminal. On the other hand, when the valve is in the open state, the heat medium flows from the heating circuit to the tank circuit through the auxiliary passage, so the temperature detected by the tank circuit temperature detection means becomes equal to or higher than the subtraction temperature . Focusing on this point, the abnormality judging means is an open abnormality in which the on / off valve can not be controlled from the open state to the closed state when the temperature detected by the tank circuit temperature detection means is equal to or higher than the subtraction temperature. Therefore, the open abnormality of the on-off valve can be determined without providing a flow rate sensor or a temperature sensor in the auxiliary flow path. Thereby, the opening abnormality of the on-off valve can be determined while preventing the cost increase due to the addition of the sensor.

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 state of the on-off valve of the flow path for freeze prevention. The flowchart which shows the flow of the process which determines the state of the on-off valve of the flow path for freeze prevention of 2nd Embodiment. The figure which shows the temperature for determination according to external temperature.

First Embodiment
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 antifreeze liquid (hereinafter referred to as a hot liquid) as a heating medium for heating, and a hot liquid It includes a heat pump unit 3 equipped with a heat pump 31 for heating, a combustion type heat source unit 4 equipped with a combustion type heat source unit 41 as an auxiliary heat source unit for heating liquid, and one or more heating terminal units. And a heating terminal unit 5.

  In the storage tank 11, a heat storage hot liquid circulation outward path 12a (tank circulation path) and a heat storage 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 Heating liquid circulation path 13a (heating circulation) for circulating the heating liquid circulation return path 12b (tank circulation path) and the heating liquid in the storage tank 11 via the combustion type heat source unit 4 and the heating terminal unit 5 Road) and the heating liquid circulation return path 13b (heating circulation path) are connected.

  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 is connected to the lower portion of the storage tank 11 and the condenser 35 of the heat pump 31. The heat storage liquid circulation return path 12 b is connected to the condenser 35 and the upper portion of the storage tank 11. A heat storage circulation pump 18 mounted on the heat storage circulation forward path 12a described later stores the heating liquid in the storage tank 11, the heat storage circulation forward path 12a, the condenser 35 of the heat pump 31, and the heat storage circulation. It circulates through return route 12b.

  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 temperature sensor 16 detects the temperature of the warm liquid flowing out of the storage tank 11 at the upstream portion of the thermal fluid circulation forward passage 12a (the upstream temperature detection in the thermal fluid circulation outward route 12a. Means, a manual open / close valve 17, a heat storage circulation pump 18 (tank circulation pump) for generating a flow of warm liquid from the upstream side to the downstream side of the heat storage circulation forward path 12a, condensation of the heat pump 31 A temperature sensor 19 (tank circulation passage temperature detection means) is mounted which detects the temperature of the warm fluid flowing into the machine 35 at the downstream portion of the thermal fluid circulation outward passage 12a.

  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.

  The heat storage circulation return path 12 b has its upstream end connected to the outlet of the condenser 35 of the heat pump 31 and its downstream end connected to the top of the storage tank 11. Then, the temperature sensor 20 (temperature detection means after heat pump passage) for detecting the temperature of the warm liquid flowing out of the condenser 35 at the upstream portion of the warm liquid circulation return passage 12b for heat storage An on-off valve 21 of the formula and a temperature sensor 22 (temperature detecting means after heat pump passage) for detecting the temperature of the warm fluid flowing into the storage tank 11 at the downstream portion of the thermal fluid circulation return passage 12b are mounted.

  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 heating liquid circulation path 13 a is connected to the storage tank 11 and the combustion type heat source unit 4. The heating liquid circulation return path 13 b is connected to the heating terminal unit 5 and the storage tank 11. The heating circulation pump 51, which will be described in detail later, sends the heating liquid in the storage tank 11 to the heating liquid circulation path 13a, the combustion type heat source unit 4, the heating terminal unit 5, and the heating liquid circulation return path 13b. Circulate.

  The upstream end of the heating liquid circulation path 13a is joined to the downstream end of the heat storage circulation path 12b. Therefore, the upstream end of the heating liquid circulation path 13a is connected to the upper portion of the storage tank 11 via the downstream end of the heat storage circulation path 12b.

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

  Furthermore, a bypass passage 24 is provided which allows the downstream portion of the heating fluid circulation return passage 13b and the upstream portion of the heating fluid circulation forward passage 13a to be communicated via the distribution valve 23 without passing through the inside of the storage tank 11. It is done.

  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.

  The distribution valve 23 has its inlet port in communication with the upstream side of the heating fluid circulation return path 13b and one outlet port in communication with the downstream side of the heating fluid circulation return path 13b. While being interposed in the liquid circulation return passage 13b, the other outlet port is connected to the bypass passage 24 so as to be in communication with the heating fluid circulation forward passage 13a via the bypass passage 24.

  Therefore, by controlling the distribution valve 23 by the later-described tank control unit 72 provided in the storage tank unit 2, a part or all of the heating liquid returned to the storage tank unit 2 in the heating liquid circulation return path 13b. It is possible to circulate the heating fluid circulation path 13a without passing from the distribution valve 23 through the storage tank 11 (through the bypass passage 24).

  The distribution valve 23 may be interposed at the connection point between the bypass passage 24 and the heating liquid circulation 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 in communication with the downstream heating warm fluid circulation return passage 13b (the outlet port on the bypass passage 24 side) Fully closed, the outlet port on the storage tank 11 side is fully open), the bypass valve OFF state (second state) of the distribution valve 23, all the warm liquid flowing into the inlet port of the distribution valve 23 is a bypass The bypass ON state of the distribution valve 23 (the operation state in which the outlet port on the bypass passage 24 side is fully open and the outlet port on the storage tank 11 side is fully closed) flowing out from the other outlet port communicating with 24 State), a state in which a part of the warm liquid flowing into the inlet port of the distribution valve 23 flows out from each of the two outlet ports is called a bypass intermediate state of the distribution valve 23.

  Further, two temperature sensors 25 and 26 are mounted in the storage tank unit 2 in the heating liquid circulation outer path 13a, and one temperature sensor 27 in the storage tank unit 2 is mounted in the heating liquid circulation return path 13b. Is attached.

  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 for heat storage) into the heating fluid circulation outward passage 13a, and among the heating fluid circulation outward passages 13a, It is mounted on the upstream side of the merging point of the bypass passage 24.

  The temperature sensor 26 is a sensor for detecting the temperature of the hot fluid delivered from the storage tank unit 2 to the heating terminal unit 5 side, and is downstream of the merging location of the bypass passage 24 in the hot fluid circulation forward passage 13a for heating. It is attached to the part of. 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 the 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) to the 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 obtained.

  The temperature sensor 27 mounted on the heating liquid circulation return path 13b is a sensor for detecting the temperature of the heating liquid returned to the storage tank unit 2 from the heating terminal unit 5 side, and among the heating liquid circulation return path 13b , 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, in the condenser 35, the downstream end of the heat storage liquid circulation forward path 12a and the upstream end of the heat storage liquid circulation return path 12b are connected.

  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.

  Further, the heat pump unit 3 is provided with a temperature sensor 39 for detecting the outside air temperature.

  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. Furthermore, 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 heating liquid circulation return path 13b so that the storage liquid unit 2 circulates the heated liquid released by each. It is done.

  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 hot liquid flow channel 42L described later.

  The combustion type heat source unit 4 heats the heating liquid sent by the heating type heat liquid circulation outward path 13a by the combustion type heat source unit 41 as necessary, by the combustion type heat source unit 41 (auxiliary heat source) and the heating terminal It is a flow path for supplying to the unit 5, and is provided with a heating hot liquid flow path 42 continuous to the downstream side of the heating hot liquid circulation outward path 13a. In the present embodiment, the heating circulation path of the present invention is configured by the heating warm liquid circulation forward path 13a, the heating warm liquid circulation return path 13b, and the heating warm liquid flow path 42.

  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 heating warm liquid circulation outward passage 13a, and the warm liquid flowing through the heating warm liquid circulation outward passage 13a flows in.

  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 (heating circulation pump) for generating a flow of the heating liquid from the upstream side to the downstream side of the heating liquid flow passage 42 is provided. The high temperature side heating hot liquid flow passage 42H and the low temperature side heating hot liquid flow passage 42L are mounted on the upstream side of the diverted portion.

  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 end on the upstream side of the freeze prevention channel 61 (auxiliary flow channel) 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 an on-off valve control unit 63 (control means).

  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 39 for detecting the outside air temperature, and the outside air temperature data detected by the outside air temperature sensor 39 is sent to a 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 Electric power (power supplied from the first power source) 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, the power supply circuit portion of the combustion control unit 74 of the combustion type heat source unit 4 is supplied with normal household power or commercial power (hereinafter, normal power (referred to as power supplied from the second power source)) Ru.

  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 circulation path 12 via the condenser 35 and the temperature in the storage tank 11 is Liquid storage 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 circulation of the heating liquid is performed in the heating liquid circulation outer path 13a and the heating liquid circulation return path 13b. Be Further, the distribution valve 23 is maintained in the bypass OFF state or the bypass intermediate state. The distribution valve 23 may be in the bypass ON state.

  The warm liquid supplied from the storage tank unit 2 to the combustion type heat source unit 4 flows from the heating warm liquid circulation outward path 13 a 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 via the heating liquid circulation return path 13b and the bypass path 24 to the heating temperature. The solution is circulated to the solution circulation path 13a.

  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 passage 24 side of the distribution valve 23 is fully opened and the outlet port on the storage tank 11 is fully closed). That is, the whole amount of the warm liquid returned to the storage tank unit 2 through the heating fluid circulation return path 13b does not pass through the storage tank 11, but from the distribution valve 23 through the bypass path 24 to circulate the heating fluid The distribution valve 23 is controlled to circulate in the forward 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, with the distribution valve 23 controlled to the bypass ON state, the heating circulation pump 51 is operated, and the heating fluid circulation forward passage 13a and the heating fluid circulation return passage 13b (the storage tank 11 side of the bypass passage 24) Of the heating fluid circulation return passage 13b) and the bypass fluid 24 are performed.

  Then, the warm liquid supplied to the combustion type heat source unit 4 through the warm liquid circulation forward path 13a for heating is burned from the warm liquid circulation outward path 13a as in the heating operation when the heat pump 31 is operable. Flows into the main heating liquid flow passage 42 of the heat source unit 4, and heating is performed via one or both of the high temperature side heating liquid flow channel 42H and the low temperature side heating liquid flow channel 42L. It is supplied to one or both of the terminals 5H and 5L.

  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 warm liquid in the storage tank 11 is cooled, the warm 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 passage 24 is After flowing through, it is supplied to the combustion type 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 stop time varies depending on the supply contract or the like of the snow melting power, and the operation stop time of the heat pump 31 differs accordingly.

  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. In addition, the supply schedule can be changed.

  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 among the detected temperatures of the temperature sensor 39 (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, when the supply of the snow melting power is stopped, the on-off valve abnormality determination is performed to determine whether the on-off valve 62 is abnormal in the snow melting power supply stop period.

  In the on-off valve abnormality determination, first, the on-off valve control unit 63 determines whether the supply of snow melting power is stopped and the antifreeze control is OFF (no antifreeze control is executed) (STEP 1). When the supply of snow melting power is stopped and the freeze prevention control is off (“YES” in STEP 1), the on-off valve 62 is controlled to be in the closed state by the on-off valve control unit 63 (STEP 2). Then, the heating operation is started in which the heating set temperature is set to 60 ° C. to operate the combustion type heat source device 41 and the heating circulation pump 51 (STEP 3).

  The pump control unit 73 counts the elapsed time of the snow melting power supply stop period by a timer (not shown), and determines whether the elapsed time has reached 2 hours (STEP 4). The two-hour period is a snow melting power supply stop period, and when the elapsed time reaches two hours, the snow melting power supply is resumed.

  If the elapsed time has reached 2 hours (“YES” in STEP 4), the pump control unit 73 sets the temperature detected by the temperature sensor 19 to the temperature detected by the temperature sensor 39 (outside air temperature) in advance. It is judged whether it is more than addition temperature (predetermined temperature) which added (for example, 15 ° C) (STEP5). The addition temperature changes in accordance with the temperature detected by the temperature sensor 39 (outside air temperature). If the outside air temperature is high, the addition temperature is also high, and if the outside air temperature is low, the addition temperature is also low.

  The set temperature can be appropriately changed in accordance with the stop time of the heat pump 31 or the detected temperature of the temperature sensor 19 immediately before the heat pump 31 stops. Specifically, the set temperature is raised as the stop time of the heat pump 31 is shorter (for example, when the stop time is 1 hour, the set temperature is 21 ° C.), and the detected temperature of the temperature sensor 19 immediately before the heat pump 31 stops. The lower the setting temperature, the lower the setting temperature (for example, when the detection temperature of the temperature sensor 19 is 73.degree. C., the setting temperature is 15.degree. C.). If the detection temperature of the temperature sensor 19 is 60.degree. The temperature is brought to 10 ° C.). The detected temperature of the temperature sensor 19 is increased or decreased in proportion to the heating temperature of the combustion type heat source machine 41. By setting the set temperature in accordance with the detected temperature of the temperature sensor 19, the set temperature is a combustion type. It will be set according to the heating temperature by the heat source unit 41.

  When the temperature detected by the temperature sensor 19 is equal to or higher than the addition temperature (“YES” in STEP 5), the pump control unit 73 closes the on-off valve 62 from the open state even though the on-off valve 62 is closed. It is determined that the open abnormality has been disabled (STEP 6), and that effect is displayed on the remote control. Then, the control units 72 to 74 stop the units 2 to 4 and stop the operation of the heating device 1 (STEP 7).

  On the other hand, if the temperature detected by the temperature sensor 19 is not equal to or higher than the addition temperature (“NO” in STEP 5), the pump control unit 73 determines that the on-off valve 62 is operating normally (STEP 8). Display on.

  When the antifreeze control is started in a state where the supply of the snow melting power is stopped (“NO” in STEP 1), STEP 1 is performed again. If the elapsed time has not reached 2 hours (“NO” in STEP 4), STEP 4 is performed again.

  In the present embodiment, when the on-off valve 62 is closed, the temperature detected by the temperature sensor 19 when the supply of snow melting power is started is 15 ° C. added to the temperature detected by the temperature sensor 39 (outside temperature). It becomes below the added temperature. For example, when the outside air temperature is 5 ° C., the temperature detected by the temperature sensor 19 is about 17 ° C. On the other hand, when the on-off valve 62 is open, the temperature sensor 19 detects the temperature of the hot fluid to which the hot fluid (60 ° C.) passing through the freeze prevention channel 61 is added. That is, the temperature detected by the temperature sensor 19 is approximately 25 ° C. to 60 ° C., which is equal to or higher than the addition temperature (5 ° C. + 15 ° C.) (“YES” in STEP 5). Therefore, the pump control unit 73 determines that the on-off valve 62 can not be controlled from the open state to the closed state despite the fact that the on-off valve 62 is controlled to be closed. On the remote control.

  In the case of an open abnormality in which the on-off valve 62 is fully opened, the temperature detected by the temperature sensor 19 is approximately 60.degree. On the other hand, even in the case of an open abnormality in which the on-off valve 62 is slightly open, the temperature sensor 19 detects the temperature of the hot fluid to which the hot fluid (60 ° C.) passing through the freeze prevention channel 61 is added. Although the temperature detected by the temperature sensor 19 in this case changes according to the degree of opening of the on-off valve 62, for example, even if it is open about 10%, it becomes 25 ° C. or more. Can be determined.

  As a result of conducting experiments in the outside air temperature range of -5 ° C. to 25 ° C., when the on-off valve 62 is closed, the supply of snow melting power is resumed after stopping the heat pump 31 for 2 hours. The temperature detected by the temperature sensor 19 was obtained by adding about 12 ° C. to the temperature detected by the temperature sensor 39 (outside air temperature). According to this experimental result, the addition temperature is a temperature obtained by adding 15 ° C. to the temperature detected by the temperature sensor 39 (outside air temperature). As described above, the shorter the stop time of the heat pump 31, the higher the temperature to be added.

Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIG. About the same matter as a 1st embodiment, explanation is omitted using the same reference mark.

  In the second embodiment, when the temperature detected by the temperature sensor 19 is lower than the heating set temperature, the on-off valve abnormality determination is performed to determine whether the on-off valve 62 is abnormal.

  The pump control unit 73 determines whether the heat pump 31 is stopped (STEP 10), and when it is determined that the heat pump 31 is stopped ("YES" in STEP 10), the temperature detected by the temperature sensor 19 is heating It is determined whether it is less than a set temperature (for example, 60 ° C.) (STEP 11). When the temperature detected by the temperature sensor 19 is less than the heating set temperature (“YES” in STEP 11), the on-off valve control unit 63 controls the on-off valve 62 to be closed (STEP 12), and the combustion control unit 74 performs heating The heating operation for operating the combustion type heat source unit 41 and the heating circulation pump 51 with the set temperature set to 60 ° C. is started (STEP 13). When it is determined that the heat pump 31 is not stopped (“NO” in STEP 10), STEP 10 is performed again.

  The pump control unit 73 determines whether the temperature detected by the temperature sensor 19 is equal to or higher than a subtraction heating temperature obtained by subtracting a preset temperature (for example, 5 ° C.) preset from the heating set temperature (STEP 14).

  When the temperature detected by the temperature sensor 19 is equal to or higher than the subtraction heating temperature (“YES” in STEP 14), the pump control unit 73 closes the on-off valve 62 from the open state even though the on-off valve 62 is closed. It determines that it is an open abnormality in which control to the state is disabled (STEP 15), and displays that effect on the remote control. Then, the control units 72 to 74 stop the units 2 to 4 and stop the operation of the heating device 1 (STEP 16).

  On the other hand, if the temperature detected by the temperature sensor 19 is not above the subtractive heating temperature (“NO” in STEP 14), the pump control unit 73 determines that the on-off valve 62 operates normally (STEP 17). Display on the remote control.

  When the temperature detected by the temperature sensor 19 is not less than the heating set temperature (“NO” in STEP 11), STEP 11 is performed again.

  In the present embodiment, when the on-off valve 62 is closed, the warm liquid heated to the heating set temperature (60 ° C.) by the combustion type heat source machine 41 does not flow to the freeze prevention channel 61, so the temperature sensor 19 The detected temperature at is lower than the heating set temperature (for example, 25 ° C.). On the other hand, when the on-off valve 62 is open, the temperature sensor 19 detects the temperature of the warm liquid (60 ° C.) passing through the antifreeze passage 61. That is, the temperature detected by the temperature sensor 19 (about 57 ° C. to 60 ° C.) becomes equal to or higher than the subtraction heating temperature (55 ° C. subtracted from 60 ° C. to 5 ° C.) (“YES” in STEP 14), and the pump control unit 73 determines that the on-off valve 62 can not be controlled from the open state to the closed state despite the fact that the on-off valve 62 is controlled to be closed, and that effect is displayed on the remote control . The first embodiment and the second embodiment may be implemented in combination.

  In the above-mentioned embodiment, although a combustion type heat source machine is operated by usual electric power, it replaces with a combustion type heat source machine, and the present invention is practicable also to a heating device provided with an electric type heat source machine operated by usual electric power.

  In the above embodiment, the detected temperature of the temperature sensor 19 is used to determine the presence or absence of a failure of the on-off valve 62. However, the detected temperature of the temperature sensor 20 is used to determine the presence or absence of a failure of the on-off valve 62 You may do it.

  In the first embodiment, the presence or absence of a failure of the on-off valve 62 is determined based on the detected temperature (outside air temperature) by the temperature sensor 39 after resuming the supply of snow melting power. The temperature detected by the temperature sensor 39 (the outside air temperature Ta) may be stored, and the presence or absence of a failure of the on-off valve 62 may be determined based on the outside air temperature Ta. In this embodiment, the determination temperature (predetermined temperature) is determined based on the outside air temperature Ta, and when the temperature detected by the temperature sensor 19 is equal to or higher than the determination temperature, the pump control unit 73 controls the on-off valve 62 to close. However, it is determined that the open / close valve 62 is in the open state where the control from the open state to the closed state is disabled. In this case, as shown in FIG. 5, the temperature for determination is determined according to the temperature detected by the temperature sensor 39 (outside air temperature Ta) before the supply of snow melting power is stopped.

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 Warming liquid circulation return path 12b, 13a: Warming liquid circulation forward path, 13b: Heating hot liquid circulation returning path, 14a-14c, 16, 17, 19, 20, 22, 25-27, 39 Temperature sensor, 23: Distribution Valve 24 24 bypass passage 31 heat pump 51 heating circulation pump 61 freeze prevention flow passage 62 on-off valve 63 on-off valve control unit 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 which operates with electric power supplied from a first power source to heat a heat medium flowing through the tank circuit;
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 which operates with power supplied from a second power source and heats the heat medium flowing through the heating circuit upstream of the heating terminal;
An auxiliary flow passage connecting the tank circulation passage and the heating circulation passage;
An on-off valve for opening and closing the auxiliary flow path;
The tank, which is provided downstream of the portion where the auxiliary flow path of the tank circulation path is connected, is operated by the power supplied from the first power source, and is used for control when operating the heat pump Tank circulation passage temperature detection means for detecting the temperature of the heat medium in the circulation passage;
From the state where the power supply from the first power source is stopped, the on-off valve is controlled to be in the closed state, and the auxiliary heat source and the heating circulation pump are operating, the power supply from the first power source is After start, when the temperature detected by the tank circulation passage temperature detection means is equal to or higher than a predetermined temperature, an abnormality that determines that the on / off valve can not be controlled from the open state to the closed state is an open abnormality Determination means,
A heating device comprising: In the heating device according to claim 1,
The heating apparatus according to claim 1, wherein the predetermined temperature is set in accordance with a heating temperature of the heat medium by the auxiliary heat source. In the heating device according to claim 1 or 2,
It has an outside air temperature detection means that detects the temperature of the outside air,
The heating apparatus according to claim 1, wherein the predetermined temperature is set according to a temperature detected by the outside air temperature detecting means. 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 which operates with electric power supplied from a first power source to heat a heat medium flowing through the tank circuit;
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 which operates with power supplied from a second power source and heats the heat medium flowing through the heating circuit upstream of the heating terminal;
An auxiliary flow passage connecting the tank circulation passage and the heating circulation passage;
An on-off valve for opening and closing the auxiliary flow path;
A tank circulation passage temperature provided downstream of a portion of the tank circulation passage to which the auxiliary passage is connected and detecting a temperature of a heat medium in the tank circulation passage used for control when operating the heat pump Detection means;
When the temperature detected by the tank circulation path temperature detection means is less than the heating set temperature by the heating terminal, the control for controlling the on-off valve in a closed state and operating the auxiliary heat source and the heating circulation pump Control means to perform,
After the control for determination, if the temperature detected by the tank circulation path temperature detection means is equal to or higher than the subtraction temperature set lower than the heating set temperature, the on-off valve can not be controlled from the open state to the closed state. Abnormality determination means for determining that the opening abnormality is
A heating device comprising: