KR102316895B1 - Heating device - Google Patents

Abstract

(Project) A heating device capable of reliably determining the normal connection between a heating circuit and a storage tank is provided.
(Solution) A heating operation is performed, and the heating circulation pump 51 is turned on. The distribution valve 23 is controlled to the bypass-on state, the circulation pump 18 for heat storage and the heat pump 31 are operated, and the heat storage of the warm liquid in the storage tank 11 is performed. When the storage tank 11 is filled with the warm liquid, the heating circulation pump 51 continues to be turned on, and the combustion heat source device 41 is turned off. The distribution valve 23 is controlled to the bypass-off state, and the operation of the circulation pump 18 for heat storage and the heat pump 31 is stopped. When the detection temperature of each of the temperature sensors 25 and 26 is higher than the subtraction temperature obtained by subtracting 5°C from the temperature detected by the temperature sensor 14a, and the state continues for 5 seconds, it is determined that the piping is normally connected, Display that effect on the remote control.

Description

heating device {HEATING DEVICE}

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

In a heating device using a heat medium such as hot water, hot water heated by a heat source device 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 device to dissipate the heat of the hot water to the floor A configuration in which heating is performed by radiating heat with a heating device is known. Such a heating device connects a heat pump and a storage tank by piping. When piping is not correctly connected, heating at a desired temperature cannot be performed. Then, the technique of determining whether piping is correctly connected is proposed (for example, patent documents 1 and 2).

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

The heating device described in Patent Document 2 detects a flow rate with a flow rate sensor provided in the flow path when sending out hot water at the bottom of a storage tank to a heat pump by driving a circulation pump, and based on the detected flow rate and boiling temperature The difference between the instructed flow rate is calculated, and when the output amount is larger than the predetermined flow rate, it is determined that the heat pump and the storage tank are not connected correctly.

Patent Document 1: Japanese Patent Laid-Open No. 2007-333288 Patent Document 2: Japanese Patent Laid-Open No. 2011-099602

In a heating apparatus having an auxiliary heat source different from a heat pump, an auxiliary heat source is provided in the middle of a heating circuit that communicates a storage tank and a heating terminal. Such a heating apparatus WHEREIN: In order to determine the normal connection of a heating circuit and a storage tank, it is conceivable to perform connection determination like patent documents 1 and 2.

However, in Patent Document 1, when the tank lower temperature is higher than the tank upper temperature, it is determined that there is a misconnection. It sometimes flows from the bottom to the top of the tank. In this case, the tank upper temperature and the tank lower temperature become almost equal, and even a erroneous connection is judged to be a normal connection. In addition, when the heat pump starts to be driven, the tank upper temperature and the tank lower temperature may become almost the same even if erroneously connected due to insufficient capability of the heat pump.

In Patent Document 2, when the difference between the detected flow rate and the indicated flow rate by the flow sensor is larger than the predetermined flow rate, it is determined as a misconnection. In some cases, the difference does not become larger than the predetermined flow rate, and even a erroneous connection is determined to be a normal connection.

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

The heating device of the present invention includes a storage tank for storing heat, a tank circulation path communicating with the upper and lower parts of the storage tank, and a tank for circulating heat from the lower part of the storage tank to the upper part through the tank circulation path. A circulation pump; a heating circulation pump circulating from the upper part to the lower part of In the heating apparatus in which an upstream side is connected to the upper part of the said storage tank, and the downstream side of the said heating terminal of the said heating circuit is connected to the lower part of the said storage tank, the tank which detects the temperature of the heat medium in the said storage tank Temperature detection means, heating circuit temperature detection means which detects the temperature of the heat medium in the said heating circuit on the upstream side from the heating location by the said auxiliary heat source of the said heating circuit, and the detection temperature by the said tank temperature detection means is the said heating terminal When the heating circulation pump is driven in a state at which heat is dissipated, the temperature detected by the heating circuit temperature detecting means is higher than the subtraction temperature obtained by subtracting a predetermined temperature from the detected temperature by the tank temperature detecting means, and a normal connection determining means for determining and notifying the normal connection state.

According to the present invention, when the heating circulation pump is driven in a state where the temperature detected by the tank temperature detecting means is the temperature at which heat is radiated in the heating terminal (for example, 80° C.), when the storage tank is normally connected, The temperature of the heat medium supplied to the heating circuit from the upper part is detected by the heating circuit temperature detecting means before the heat medium reaches the heating terminal. Therefore, the detected temperature by the tank temperature detecting means and the detected temperature by the heating circuit temperature detecting means are almost the same (about 80°C), or the detected temperature by the heating circuit temperature detecting means is slightly (for example, about 2°C) ) is lowered. On the other hand, at the time of erroneous connection, the temperature of the heat medium supplied to the heating circuit from the lower part of the storage tank is detected (for example, 60 degreeC) by a heating circuit temperature detection means after a heat medium radiates heat via a heating terminal. Therefore, the detection temperature (60°C) by the heating circuit temperature detection means is less than the subtraction temperature (75°C) obtained by subtracting a predetermined temperature (for example, 5°C) from the detection temperature (80°C) by the tank temperature detection means. do. Taking this into consideration, the normal connection determination means determines that it is in a normal connection state and notifies it when the temperature detected by the heating circuit temperature detection means is higher than the temperature detected by the tank temperature detection means by subtracting a predetermined temperature from the temperature detected by the tank temperature detection means. The normal connection of the storage tank can be reliably determined and notified.

Moreover, it is preferable that the said heating circuit temperature detection means is provided in the position lower than the connection part of the said heating circuit and the said storage tank upper part.

According to this configuration, the influence of the heat transfer through the heating circuit from the upper part of the storage tank on the heating circuit temperature detection means to the heating circuit temperature detection means is reduced compared to installing the heating circuit temperature detection means at a position higher than the connection part of the heating circuit and the upper part of the storage tank. can

Moreover, it is preferable that the said normal connection determination means determines that it is the said normal connection state and notifies it, when the time which the detected temperature by the said heating circuit temperature detection means is higher than the said subtraction temperature continues for predetermined time.

According to this structure, since the normal connection determination means determines that it is a normal connection state when the time which the time detected by a heating circuit temperature detection means is higher than the said subtraction temperature continues for predetermined time, since it is a heating circuit temperature detection means, the detection temperature When is higher than the subtraction temperature, it is immediately determined that the normal connection state is in the normal connection state, and no notification is made. For this reason, it is not a normal connection, but when the detected temperature by a heating circuit temperature detection means is higher than the said subtraction temperature by a sudden change of environment, a situation, etc., it can prevent that it is determined as a normal connection state and notified.

In addition, it is preferable that the said predetermined time is determined based on the capacity|capacitance of the said storage tank from the upper part of the said storage tank to the said tank temperature detection means, and the flow volume of the said heat medium.

According to this configuration, by determining the predetermined time from the upper part of the storage tank to the tank temperature detecting means based on the storage tank capacity and the flow rate of the heat medium, the time required for determining the normal connection state can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS It is a system block diagram of the heating apparatus of this embodiment.
Fig. 2 is a diagram showing control contents in freeze prevention control;
Fig. 3 is a flowchart showing a flow of processing for determining a connection state between a storage tank and a combustion type heat source unit;
4 is a system configuration diagram of a heating device in a state in which a storage tank and a combustion heat source unit are erroneously connected.

As shown in FIG. 1, the heating apparatus 1 of this embodiment is the storage tank unit 2 in which the storage tank 11 which stores the warm antifreeze (henceforth a warm liquid) as a heating medium was mounted. ), a heat pump unit 3 equipped with a heat pump 31 for heating a warm liquid, and a combustion heat source unit 4 equipped with a combustion heat source 41 as an auxiliary heat source for heating a warm liquid; , a heating terminal unit 5 comprising one or more heating terminals.

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

The warm-liquid circulation path 13b for downstream heating is connected to the warm-liquid circulation path 13a for heating on the upstream side, and the warm-liquid circulation path 13c for heating upstream is connected to the warm-liquid circulation path 13d for downstream heating. These connections are performed manually by an installer after installation of the heating device 1 .

In addition, the storage tank 11 has a plurality of height positions (three in the illustrated example) spaced in the height direction (up and down direction), and a temperature sensor that detects the temperature of the warm liquid in the storage tank 11 at each height position. (14a, 14b, 14c, tank temperature detection means) is mounted.

The warm liquid circulation path 12a for heat storage sends the warm liquid from the storage tank 11 to the condenser 35 of the heat pump 31 . The warm liquid circulation return path 12b for heat storage refluxes the warm liquid from the condenser 35 to the storage tank 11 to be described later.

The upstream end of the warm liquid circulation outgoing path 12a for thermal storage is connected to the lower portion of the storage tank 11 , and the downstream end thereof is connected to the condenser 35 . In addition, a non-return valve 15 is provided in the warm liquid circulation path 12a for thermal storage, and a temperature sensor 16 that detects the temperature of the warm liquid flowing out from the storage tank 11 at an upstream portion of the warm liquid circulation outward path 12a for thermal storage; A manual open/close valve 17, a heat storage circulation pump 18 for generating a flow of hot liquid from the upstream side to the downstream side of the thermal storage warm liquid circulation outgoing path 12a, and a condenser 35 of the heat pump 31 A temperature sensor 19 for detecting the temperature of the incoming hot liquid at a downstream part of the warm liquid circulation outgoing path 12a for thermal storage is mounted.

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

As for the warm liquid circulation return path 12b for heat storage, its upstream end is connected to the condenser 35 of the heat pump 31 , and its downstream end is connected to the upper part of the storage tank 11 . In addition, a temperature sensor 20 for detecting the temperature of the hot liquid flowing out from the condenser 35 at an upstream portion of the warm liquid circulation return path for heat storage 12b, a manual on/off valve 21, and , a temperature sensor 22 for detecting the temperature of the warm liquid flowing into the storage tank 11 in the downstream part of the warm liquid circulation return path 12b for thermal storage is mounted.

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

The warm liquid circulation outgoing path 13a for heating on the upstream side and the warm liquid circulation outgoing path 13b for downstream heating send out the hot liquid from the storage tank 11 to the heating terminal unit 5 . The warm liquid circulation return path 13c for heating upstream and the warm liquid circulation return path 13d for downstream heating return the warm liquid from the heating terminal unit 5 to the storage tank 11 .

The upstream warm liquid circulation outward path 13a for heating is a circulation path on the upstream side of the heating location by the combustion heat source 41, and its upstream end joins the downstream end of the warm liquid circulation return path 12b for heat storage. Therefore, the upstream end of the warm liquid circulation outward path 13a for upstream heating is connected to the upper part of the storage tank 11 through the downstream end of the warm liquid circulation return path 12b for heat storage.

The downstream end of the warm liquid circulation return path 13d for downstream heating is connected to the lower part of the storage tank 11 . Moreover, the distribution valve 23 provided in the storage tank unit 2 is attached to the downstream of the warm-liquid circulation return path 13d for downstream heating.

In addition, a bypass flow passage 24 for communicating the downstream portion of the downstream heating warm liquid circulation return path 13d and the upstream portion of the upstream heating warm liquid circulation outward passage 13a through the distribution valve 23 without passing through the storage tank 11 . ) is installed.

The distribution valve 23 has two outlet ports in this embodiment, and among the warm liquid flowing in from the inlet port, the flow rate of the warm liquid flowing out from one outlet port of the two outlet ports and the hot liquid flowing out from the other outlet port It is a valve that can variably control the ratio of the flow rate of the warm liquid.

And the distribution valve 23 has an inlet port in communication with the upstream side of the downstream heating warm liquid circulation return path 13d, and one outlet port communicates with the downstream side of the downstream heating warm liquid circulation return path 13d on the downstream side. It is fitted in the heating liquid circulation return path 13d, and the other outlet port is connected to the bypass flow path 24 so as to communicate with the upstream warm liquid circulation outward path 13a through the bypass flow path 24.

Therefore, by controlling the distribution valve 23 by the tank control unit 72 described later installed in the storage tank unit 2, the upstream heating liquid circulation return path 13c and the downstream side heating liquid circulation return path 13d are Without passing a part or all of the hot liquid returned to the storage tank unit 2 from the distribution valve 23 to the storage tank 11 (via the bypass flow passage 24), the warm liquid circulation path 13a for upstream heating ) can be refluxed.

In addition, the distribution valve 23 may be fitted between the bypass flow path 24 and the connection location of the warm-liquid circulation path 13a for upstream side heating.

In the following description, the operating state in which all of the warm liquid 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 liquid circulation return path 13d (bypass flow path 24) The operation state in which the outlet port on the side is completely closed and the outlet port on the storage tank 11 side is fully opened] is introduced into the bypass-off state of the distribution valve 23 and the inlet port of the distribution valve 23 Operational state in which all of the heated liquid flows out from the other outlet port communicating with the bypass flow passage 24 (the outlet port on the bypass flow passage 24 side is fully open, and the outlet port on the storage tank 11 side is completely closed operation state] is the bypass-on state of the distribution valve 23, and a state in which a portion of the warm liquid flowing into the inlet port of the distribution valve 23 flows out from each of the outlet ports of the distribution valve 23 ) is called the bypass intermediate state.

Moreover, in the storage tank unit 2, two temperature sensors 25 and 26 (heating circuit temperature detection means) are attached to the upstream warm liquid circulation outgoing path 13a for heating, and storage is stored in the downstream heating hot liquid circulation return path 13d. One temperature sensor 27 is mounted in the tank unit 2 .

The temperature sensor 25 is a sensor that detects the temperature of the hot liquid flowing from the storage tank 11 or the warm liquid circulation return path for heat storage 12b into the warm liquid circulation outward path 13a for heating on the upstream side, and the warm liquid circulation outward path for heating on the upstream side ( Among 13a), it is attached to the part on the upstream side of the merging point of the bypass flow path 24.

The temperature sensor 26 is a sensor that detects the temperature of the hot liquid sent from the storage tank unit 2 to the heating terminal unit 5 side, and is a merging of the bypass flow path 24 in the upstream warm liquid circulation outgoing path 13a for heating. It is attached to the part on the downstream side rather than the part. The temperature detected by the temperature sensor 26 coincides with or almost coincides with the temperature detected by the temperature sensor 25 in the bypass-off state of the distribution valve 23 .

On the other hand, in the bypass-on state of the distribution valve 23 or the intermediate state of the bypass, the temperature detected by the temperature sensor 26 is the warm liquid circulation path for heating upstream from the storage tank 11 or the warm liquid circulation return path 12b for heat storage ( The temperature 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 with the warm liquid flowing into 13a (a temperature lower than the temperature detected by the temperature sensor 25) .

The temperature sensor 27 mounted on the downstream heating hot liquid circulation return path 13d is a sensor that detects the temperature of the hot liquid returned from the heating terminal unit 5 side to the storage tank unit 2, and the downstream heating hot liquid circulation return path ( Among 13d), it is attached to the part on the upstream side of the distribution valve 23. As shown in FIG.

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 device for heating the warm liquid in the storage tank 11 of the storage tank unit 2 .

The heat pump 31 has a known structure, and is mounted on a refrigerant circulation passage 32 for circulating a refrigerant such as a replacement Freon such as hydrofluorocarbon (HFC) or carbon dioxide, and the refrigerant circulation passage 32 . It has an evaporator 33 , a compressor 34 , a condenser 35 , and an expansion mechanism 36 and a rotating fan 37 for supplying outside air (air) to the evaporator 33 .

The evaporator 33 performs heat exchange between the refrigerant flowing through the refrigerant circulation passage 32 and the outside air (air) supplied by the rotation of the rotating fan 37 .

The compressor (34) compresses the refrigerant supplied from the evaporator (33), thereby generating a refrigerant of high temperature and high pressure.

As described above, the condenser 35 is connected to the downstream end of the warm liquid circulation path 12a for thermal storage and the upstream end of the warm liquid circulation return path 12b for thermal storage.

In addition, the condenser 35 includes a high-temperature and high-pressure refrigerant supplied from the compressor 34 and a warm liquid supplied from the storage tank 11 through the warm liquid circulation path 12a for thermal storage by the operation of the thermal storage circulation pump 18 . By performing heat exchange of

The expansion mechanism 36 is constituted by an expansion valve or the like, and further cools by adiabatic expansion of the heat-dissipating coolant supplied from the condenser 35 , and sends the cooled coolant to the evaporator 33 .

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

In this embodiment, the heating terminal unit 5 is the high temperature side heating terminal 5H with a relatively high hot liquid temperature required for operation, and the low temperature side heating terminal 5L whose hot liquid temperature required for operation is lower than the high temperature side heating terminal 5H. to provide

The high temperature side heating terminal 5H is a bathroom heating apparatus etc., for example, The hot liquid temperature requested|required by the said high temperature side heating terminal 5H is about 80 degreeC, for example. Moreover, 5 L of low-temperature-side heating terminals are a floor heating apparatus etc., for example, The hot liquid temperature calculated|required by the said low-temperature side heating terminal 5L is about 60 degreeC, for example.

These high temperature side heating terminal 5H and low temperature side heating terminal 5L are respectively connected to the below-mentioned warm liquid flow path 42H, 42L so that the hot liquid may be supplied from the combustion type heat source unit 4 . In addition, the high-temperature side heating terminal 5H and the low-temperature side heating terminal 5L are parallel to the upstream end of the upstream heating hot liquid circulation return path 13c so as to reflux the hot liquid radiated from each to the storage tank unit 2 . connected.

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

In FIG. 1, although the high temperature side heating terminal 5H and the low temperature side heating terminal 5L were each described representatively one by one, only one of the high temperature side heating terminal 5H and the low temperature side heating terminal 5L is the heating device 1 ) may be provided.

Moreover, the heating apparatus 1 may be equipped with the high temperature side heating terminal 5H or 5 L of low temperature side heating terminals in multiple numbers. A plurality of high-temperature side heating terminals 5H are connected in parallel to an upstream-side warm-liquid flow path 42H to be described later. Similarly, 5 L of several sets of low temperature side heating terminals are parallelly connected to 42 L of warm liquid flow paths for low temperature side heating mentioned later on an upstream.

The combustion heat source unit 4 uses the combustion heat source device 41 and the hot liquid sent from the upstream heating hot liquid circulation outgoing path 13a and the downstream heating hot liquid circulation outgoing route 13b as necessary. It is a flow path for heating by (41) and supplying it to the heating terminal unit 5, and it is provided with the warm-liquid flow path 42 for heating continuous downstream of the warm-liquid circulation outward path 13b for a downstream side. In this embodiment, the warm liquid circulation outward path 13a for upstream side heating, the warm liquid circulation outward path 13b for downstream side heating, the warm liquid circulation return path 13c for upstream side heating, the downstream warm liquid circulation return path 13d for heating, and the warm liquid flow path 42 for heating ), the heating circuit of the present invention is constituted.

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

The fuel combusted by the burner 44 is, for example, a fuel gas such as city gas or LP gas. During the combustion operation of the burner 44 , fuel gas is supplied to the burner 44 through a fuel supply mechanism provided with an electromagnetic on/off valve, a proportional valve, or the like (not shown). Moreover, combustion air is supplied to the burner 44 by a fan (not shown). Then, the combustion operation of the burner 44 is performed by igniting the fuel gas supplied to the burner 44 by an igniter such as an igniter (not shown).

In addition, the structure of the fuel supply mechanism etc. which are related to the combustion operation of the burner 44 may be a well-known thing. In addition, the burner 44 is not limited to fuel gas, You may burn liquid fuels, such as kerosene.

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

Further, the combustion type heat source unit 41 may include only the main heat exchanger 45 among the main heat exchanger 45 and the auxiliary heat exchanger 46 .

The warm liquid flow path 42 for heating has its upstream end communicated with the downstream end of the downstream warm liquid circulation outgoing path 13b for heating, and the hot liquid flowing through the downstream hot liquid circulation outgoing path 13b is configured to flow in.

In addition, the upstream end of the warm liquid flow passage 42 for heating is also connected to an expansion tank (not shown) that absorbs the volume increase of the hot liquid.

The heating liquid flow path 42 is configured to pass through the auxiliary heat exchanger 46 of the combustion type heat source unit 41 in the combustion type heat source unit 4 , and is located on the downstream side of the auxiliary heat source unit 46 . It is classified into the hot liquid flow path 42H for high temperature side heating and the warm liquid flow path 42L for low temperature side heating.

The hot liquid flow path 42H for high temperature side heating is a warm liquid flow path for supplying a hot liquid to the high temperature side heating terminal 5H of the heating terminal unit 5 . The hot liquid flow path 42H for heating at the high temperature side is configured to pass through the main heat exchanger 45 of the combustion heat source 41, and a high temperature side heating terminal 5H is connected to its downstream end.

The warm-liquid flow path 42L for low-temperature side heating is a warm-liquid flow path for supplying a hot liquid to the low-temperature side heating terminal 5L of the heating terminal unit 5 . A low-temperature-side heating terminal 5L is connected to the downstream end of the warm liquid flow passage 42L for low-temperature side heating.

In the hot liquid flow path 42 for heating, a heating circulation pump 51 for generating a flow of hot liquid from the upstream side to the downstream side of the heating hot liquid flow path 42 is provided. It is attached to the upstream side from the branching point to 42L of hot liquid flow paths for side heating.

Further, in the hot liquid passage 42H for heating on the high temperature side, a temperature sensor 54 for detecting the temperature of the hot liquid flowing into the hot liquid passage 42H for heating on the high temperature side from the warm liquid passage 42 for heating in the period on the upstream side thereof. And, a temperature sensor 55 for detecting the temperature of the hot liquid flowing out from the main heat exchanger 45 is mounted.

In the example of this embodiment, the temperature sensor 54 is arrange|positioned at the position near the upstream end of the hot-liquid flow path 42H for high temperature side heating, The temperature sensor 55 is the vicinity of the main heat exchanger 45, and the said main heat exchanger said. It is arranged on the downstream side of (45).

In addition, the temperature detected by the temperature sensor 54 is, in other words, the temperature of the hot 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 5H. is the temperature of the hot liquid supplied to

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

The on/off valve 62 is attached to the flow path 61 for freezing prevention. The on-off valve 62 is controlled by an on-off valve controller 63 .

In the heating apparatus 1 of this embodiment, the storage tank unit 2 has a tank control unit 72 , the heat pump unit 3 has a pump control unit 73 , and the combustion type heat source unit 4 has a combustion control unit ( 74) are installed respectively.

Although detailed illustration of each control part 72-74 is abbreviate|omitted, each control circuit part and a power supply circuit part are included. Each control circuit unit is a circuit unit constituted by a CPU, RAM, ROM, or the like, and is capable of communicating with each other.

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

Moreover, the control circuit part of the pump control part 73 of the heat pump unit 3 detects data of the temperature sensors 19 and 20 provided in the heat pump unit 3, or the storage tank unit 2 or a combustion heat source. The operation of the circulation pump 18 for heat storage, the rotating fan 37, the compressor 34, etc. is controlled by executing a program process based on the communication data etc. provided from the control circuit part of the machine unit 4, etc.

In addition, 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 transmitted to the control circuit unit of the pump control unit 73 .

The control circuit unit of the combustion control unit 74 of the combustion heat source unit 4 includes detection data of the temperature sensors 54 and 55 provided in the combustion heat source unit 4, or an instruction given from a remote control (not shown). By executing program processing based on data (instruction data for executing heating operation) or communication data provided from the control circuit unit of the storage tank unit 2 or the heat pump unit 3 , the combustion type heat source device The operation of (41) and the heating circulation pump (51) is controlled.

In addition, the control circuit part of each control part 72-74 may be comprised by one circuit board.

The power supply circuit units of the respective control units 72 to 74 are, respectively, each actuator of the storage tank unit 2 (distribution valve 23, etc.), each electronic device of the heat pump unit 3 (circulation pump 18 for heat storage; The compressor 34, the rotating fan 37, etc.], and each actuator of the combustion type heat source unit 4 (heating circulation pump 51 etc.) are circuit parts for supplying electric power.

In this case, in the heating apparatus 1 of this embodiment, the power supply circuit part of the tank control part 72 of the storage tank unit 2, and the power supply circuit part of the pump control part 73 of the heat pump unit 3 are power supply for operation. Snowmelting power is supplied as power.

Moreover, in this embodiment, a part of the snowmelting electric power supplied to the power supply circuit part of the tank control part 72 of the storage tank unit 2 is power supply power for operation|movement of electrical equipment, such as the distribution valve 23 of the storage tank unit 2 is used as

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

Next, operation|movement of the heating apparatus 1 of this embodiment is demonstrated.

By the control process of the control circuit part of the pump control part 73 in the state in which snowmelting electric power is supplied to the tank control part 72 of the storage tank unit 2 and the pump control part 73 of the heat pump unit 3, it is for heat storage The circulation pump 18 and the heat pump 31 are operated.

Accordingly, the warm liquid in the storage tank 11 is circulated through the condenser 35 in the warm liquid circulation path for thermal storage 12a and the warm liquid circulation return path 12b for thermal storage to a predetermined temperature (for example, about 80 ° C.) It is heated, and heat storage of the warm liquid in the storage tank 11 is performed.

On the other hand, when it is instructed to perform heating operation of the high temperature side heating terminal 5H or the low temperature side heating terminal 5L by the remote control, the tank control part 72 of the storage tank unit 2 and the combustion type heat source unit Heating operation is performed by the control process of one control circuit part of the combustion control part 74 of (4), or the cooperative control process of both control circuit parts. When the control circuit part of the combustion control part 74 is operating the combustion type heat source device 41 and the heating circulation pump 51, it transmits the combustion operation data which shows that effect to the on-off valve control part 63.

The heating operation in the case where the heat pump 31 is operable is specifically performed as follows.

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

Therefore, for example, heating operation of both high temperature side heating terminals 5H, such as a bathroom heater whose heating request temperature is 80 degreeC, and low temperature side heating terminals 5L, such as a floor heater whose heating request temperature is 60 degreeC When performing is instructed, or when performing heating operation only for high temperature side heating terminal 5H is instructed, heating set temperature is set to 80 degreeC.

Moreover, when performing heating operation only for 5 L of low temperature side heating terminals is instructed, for example, heating set temperature is set to 60 degreeC.

In addition, when the priority order of heating terminal 5H, 5L operation is separately designated by a user etc., you may make it set the heating request temperature of the heating terminal of highest priority as heating set temperature. In that case, even when performing heating operation of both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L is instructed, the heating request temperature (60 degreeC) for low temperature side heating terminals 5L is heated. You may make it set as a set temperature.

In the state in which the heating set temperature is set in this way, the heating circulation pump 51 of the combustion heat source unit 4 is operated, and each heating liquid circulation outward path 13a, 13b and each heating hot liquid circulation return path 13c and 13d is operated. The circulation of warm liquid in In addition, the distribution valve 23 is maintained in the bypass-off state or the bypass intermediate state.

The hot liquid supplied from the storage tank unit 2 to the combustion heat source unit 4 flows into the heating hot liquid flow path 42 in the period of the combustion heat source unit 4 from the downstream heating hot liquid circulation outward path 13b. . And at the time of operation of the high temperature side heating terminal 5H, the hot liquid is supplied to the high temperature side heating terminal 5H via the hot liquid flow path 42H for high temperature side heating from the warm liquid flow path 42 for heating. Moreover, at the time of driving|operation of the low temperature side heating terminal 5L, the warm liquid is supplied to the low temperature side heating terminal 5L via the warm liquid flow path 42L for low temperature side heating from the warm liquid flow path 42 for heating of a period.

In addition, at the time of operation of both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L, in the heating liquid flow path 42 for a period, the high temperature side heating hot liquid flow path 42H and the low temperature side heating hot liquid flow path 42L. The hot liquid is supplied to both of the high-temperature side heating terminal 5H and the low-temperature side heating terminal 5L via respectively.

At this time, in the combustion heat source unit 4, the temperature of the hot liquid supplied from the heating hot liquid flow path 42 to the heating terminal unit 5 side (the temperature detected by the temperature sensors 54 and 55) is preset to the heating set temperature. In the case of almost matching within the allowable range, the combustion heat source device 41 is maintained in an operation stop state (a state in which the combustion operation of the burner 44 is not executed).

On the other hand, when the temperature (detection temperature of the temperature sensors 54 and 55) of the hot liquid supplied from the warm liquid flow path 42 for heating to the heating terminal unit 5 side deviates from a predetermined allowable range and is lower than the heating set temperature, high temperature The temperature of the hot liquid supplied from the side heating hot liquid flow path 42H to the high temperature side heating terminal 5H (the temperature detected by the temperature sensor 55) or supplied from the low temperature side heating hot liquid flow path 42L to the low temperature side heating terminal 5L The combustion operation of the burner 44 of the combustion type heat source device 41 is performed so that the temperature (the temperature detected by the temperature sensor 54) of the used warm liquid substantially coincides with the heating set temperature within a predetermined allowable range.

In this case, at the time of the heating operation of only the high temperature side heating terminal 5H, or at the time of operation of both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L, the detection temperature of the temperature sensor 55 is a predetermined allowable value. The combustion amount of the burner 44 is controlled so that it may substantially correspond to the heating set temperature within the range. Moreover, at the time of the heating operation of only 5 L of low-temperature side heating terminals, the combustion amount of the burner 44 is controlled so that the detection temperature of the temperature sensor 54 may substantially correspond to heating set temperature within a predetermined allowable range.

As described above, a heating terminal 5H that performs a heating operation on a hot liquid that matches or almost matches a heating set temperature without heating the hot liquid supplied from the storage tank unit 2 side by the combustion operation of the burner 44; 5L), the hot liquid supplied from the storage tank unit 2 side is directly supplied to the heating terminal which performs a heating operation among heating terminals 5H, 5L.

Moreover, when the temperature of the hot liquid supplied from the storage tank unit 2 side is lower than a predetermined allowable range with respect to a heating preset temperature, the amount of heat insufficient due to the combustion operation of the burner 44 of the combustion type heat source device 41 . This is added to the hot liquid. In this way, the insufficient amount of heat is added, and the warm liquid raised to a temperature corresponding to or substantially equal to the heating set temperature is supplied to the heating terminals for executing the heating operation among the heating terminals 5H and 5L.

In this way, the hot liquid supplied to one or both of the heating terminals 5H and 5L is heated in the heating terminals 5H and 5L in each of the heating liquid circulation return paths 13c and 13d and the bypass passage 24 or the storage tank 11 . ) through the reflux to the warm liquid circulation path (13a) for heating on the upstream side.

The above is the operation|movement of heating operation in the case where the heat pump 31 is operable.

Next, the heating operation in the state in which the heat pump 31 cannot operate (snow melting electric power supply stop period) is performed as follows.

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

In addition, the distribution valve 23 is in the bypass-on state (a state in which the outlet port on the bypass flow passage 24 side of the distribution valve 23 is fully opened and the outlet port on the storage tank 11 side is fully closed) is maintained as That is, the entire amount of the warm liquid returning to the storage tank unit 2 through the downstream heating warm liquid circulation return path 13d passes through the bypass flow passage 24 from the distribution valve 23 without passing through the storage tank 11 . The distribution valve 23 is controlled so that it refluxes to the warm liquid circulation outward path 13a for upstream heating.

Here, since snowmelting electric power is used as power supply electric power for operation|movement of the distribution valve 23 in this embodiment, it becomes impossible to operate the distribution valve 23 in the state in which provision of snowmelting electric power was stopped. However, in this embodiment, when the operation of the heat pump 31 cannot be performed due to the supply stop of the snowmelting power, the distribution valve ( 23) is controlled in the bypass-on state.

In addition, after the distribution valve 23 is controlled to the bypass-on state, the distribution valve 23 is maintained in the bypass-on state even if the supply of snowmelting power is stopped.

As described above, in the state in which the distribution valve 23 is controlled to be in the bypass-on state, the heating circulation pump 51 is operated, and the upstream side heating liquid circulation outgoing path 13a, the downstream heating hot liquid circulation outgoing path 13b, and the upstream side The circulation of the hot liquid in the heating warm liquid circulation return path 13c and the downstream heating warm liquid circulation return path 13d (except for the flow path on the storage tank 11 side rather than the bypass flow path 24) and the bypass flow path 24 is executed. do.

In addition, the hot liquid supplied to the combustion heat source unit 4 from the upstream warm liquid circulation outgoing path 13a and the downstream hot liquid circulation outgoing path 13b is downstream as in the heating operation when the heat pump 31 is operable. The warm liquid for side heating flows into the heating hot liquid flow path 42 in the period of the combustion heat source unit 4 from the side heating hot liquid circulation outgoing path 13b, and the hot liquid flow path 42H for the high temperature side heating and the warm liquid flow path 42L for the low temperature side heating It is supplied to one or both of the heating terminals 5H and 5L via one or both sides.

At this time, in the combustion type heat source unit 4, the temperature of the hot liquid supplied from the hot liquid flow passage 42H for high temperature side heating to the high temperature side heating terminal 5H (the temperature detected by the temperature sensor 55) or the hot liquid flow passage for the low temperature side heating. The burner of the combustion type heat source device 41 so that the temperature (detected temperature of the temperature sensor 54) of the hot liquid supplied from 42L to the low-temperature side heating terminal 5L substantially coincides with the heating set temperature within a predetermined allowable range. The combustion operation of (44) is executed.

In this case, at the time of the heating operation of only the high temperature side heating terminal 5H, or at the time of operation of both the high temperature side heating terminal 5H and the low temperature side heating terminal 5L, the detection temperature of the temperature sensor 55 is a predetermined allowable value. The combustion amount of the burner 44 is controlled so that it may substantially correspond to the heating set temperature within the range. Moreover, at the time of the heating operation of only 5 L of low-temperature side heating terminals, the combustion amount of the burner 44 is controlled so that the detection temperature of the temperature sensor 54 may substantially correspond to heating set temperature within a predetermined allowable range.

In this way, in the heating operation in a state in which the heat pump 31 is not operable (snow-melting electric power supply stop period), the hot liquid supplied to the heating terminal unit 5 in a state in which the distribution valve 23 is controlled to the bypass-on state. The temperature control control of the burner 44 of the combustion type heat source 41 is executed by the control of the combustion operation of the burner 44 .

The above is the operation|movement of the heating operation in the state (supply stoppage period of snowmelting electric power) in which the heat pump 31 cannot operate.

Since the heat pump 31 cannot properly heat the warm liquid in the storage tank 11 in a state in which the heat pump 31 is not operable, the warm liquid in the storage tank 11 will soon become higher than the heating set temperature due to natural heat dissipation or the like. lowered to a lower temperature.

In such a situation, for example, if the hot liquid for heating operation is circulated through the storage tank 11 , the warm liquid returned from the heating terminal unit 5 to the storage tank unit 2 is cooled in the storage tank 11 . Heat loss with the hot liquid is unnecessary, resulting in an increase in heat loss of the warm liquid.

However, in this embodiment, in a situation where the warm 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 is supplied to the combustion heat source unit 4 side.

For this reason, the heat dissipation of the hot liquid circulating through the combustion heat source unit 4 and the heating terminal unit 5 in the storage tank unit 2 is minimized, and the temperature of the warm liquid in the storage tank unit 2 is minimized. Heat loss can be reduced. Furthermore, the combustion amount of the burner 44 of the combustion type heat source unit 4 can be suppressed.

Next, the freezing prevention control of the heat pump 31 is demonstrated.

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

The control circuit unit of the pump control unit 73 holds in advance in a memory (not shown) data indicating a supply schedule indicating at which time of day the snowmelting power is supplied and at which time the supply is stopped. In the control circuit unit of the pump control unit 73, the current time in the clock unit (not shown) is the snowmelting power supply stop time in the snowmelting power supply schedule, and when the operation of the heat pump 31 is stopped, the Snowmelting power supply stop data indicating the effect is transmitted to the on-off valve control unit 63 . Moreover, the distribution valve 23 is controlled to the bypass-on state in the state in which provision of snow-melting electric power is being performed before the time when supply stop actually starts, and is maintained in a bypass-on state even if provision of snow-melting electric power stops.

The opening/closing valve control unit 63 controls the opening/closing valve 62 to be in a closed state, when the snowmelting power supply stop data is not received. Then, when the on/off valve control unit 63 receives the snowmelting power supply stop data, the on/off valve 62 is controlled in an open state, and the hot liquid from the low temperature side heating hot liquid passage 42L is transferred to the freezing prevention passage 61 of the It sends out to the downstream side of the on-off valve 62, and sends it out to the heat pump 31 via the warm liquid circulation outward path 12a for heat storage (freeze prevention control). The warm liquid sent to the heat pump 31 is sent to the warm liquid circulation return path 12b for thermal storage through the heat pump 31 .

In freeze prevention control of the heat pump 31, as shown in FIG. 2, the low temperature (hereafter, HP temperature) among the detected temperature of the temperature sensor 19 immediately before supply of snowmelting electric power is stopped, and the detected temperature of an outdoor temperature sensor. ) to execute control. The antifreeze control executes a control so that the temperature detected by the temperature sensor 19 does not become less than -10°C (the temperature at which the warm liquid, which is the antifreeze, freezes).

When the HP temperature >-6°C in the state in which the combustion heat source 41 or the heating circulation pump 51 is stopped (hereinafter, the heating operation is stopped), the on/off valve ( 62) is made into a normally closed state, and control which turns off the heating circulation pump 51 is performed.

When the heating operation is stopped and the temperature is -9℃<HP ≤-6℃, the on/off valve 62 is opened for 10 minutes and then closed for 20 minutes during the snowmelting power supply stop period as one set. Repeatedly, the control which turns off for 20 minutes after turning on the heating circulation pump 51 for 10 minutes according to the opening and closing of the on-off valve 62 is set as one set, and control which repeats this is performed.

When the heating operation is stopped and the temperature is -12℃<HP ≤-9℃, the on/off valve 62 is opened for 10 minutes and then closed for 10 minutes during the snowmelting power supply stop period as one set. Repeatedly, the control which turns off for 10 minutes after turning on the heating circulation pump 51 for 10 minutes according to the opening and closing of the on-off valve 62 is set as one set, and control which repeats this is performed.

When the heating operation is stopped and the temperature is -16℃<HP ≤-12℃, the on/off valve 62 is opened for 10 minutes and then closed for 3 minutes during the snowmelting power supply stop period as one set. Control which repeats this is performed as one set of control which is repeated and turns off for 3 minutes after turning on the heating circulation pump 51 for 10 minutes in accordance with the opening and closing of the on-off valve 62. As shown in FIG.

When the HP temperature ≤-16°C in the heating operation stop state, the on-off valve 62 is set to a normally open state during the snowmelting power supply stop period, and control to turn on the heating circulation pump 51 is performed.

When the HP temperature >-6°C in the state in which the combustion heat source 41 or the heating circulation pump 51 is operated (hereinafter, the heating operation state), the on-off valve 62 is normally closed during the snowmelting power supply stop period. control is executed. In addition, in the heating operation state, the heating circulation pump 51 is always on.

In the case of -9℃<HP temperature ≤-6℃ in the heating operation state, this is repeated with one set of control to keep the on/off valve 62 open for 10 minutes and then closed for 50 minutes during the snowmelting power supply stop period. control to be executed.

In the case of -19℃<HP temperature ≤-9℃ in the heating operation state, this is repeated with one set of control that makes the on/off valve 62 open for 10 minutes and then closed for 30 minutes during the snowmelting power supply stop period. control to be executed.

When the HP temperature ≤ -19°C in the state of heating operation stopped, the control that repeats this as one set of controls that leave the on/off valve 62 open for 10 minutes and then closed for 20 minutes during the snowmelting power supply stop period run

In this way, even during the snowmelting power supply stop period, by operating the heating circulation pump 51 to open the on/off valve 62, the heat pump 31 is frozen because the hot liquid is passed through the heat pump 31 there is no Moreover, since the heating circulation pump 51 is not always operated during the snowmelting power supply stop period, and since the heat pump 31 operates intermittently in the range which does not freeze, the power consumption by useless operation can be prevented.

In addition, the temperature which becomes a threshold value in antifreeze control and the time of an intermittent operation can be changed suitably, and it changes with the fluid used as a heat medium. For example, hot water may be used as the heat medium. In this case, when the HP temperature is >3°C, the on/off valve 62 is normally closed during the snow melting power supply stop period (2 hours), and the heating circulation pump 51 ) is always turned off. That is, the limit value rises by 9°C compared to using antifreeze.

As shown in FIG. 3, in the heating apparatus 1, after an installation operation|work, normal connection determination which determines whether the flow path (piping) is normally connected is performed.

In normal connection determination, the combustion control part 74 performs heating operation of 5 L of low-temperature side heating terminals first (STEP1). In the said heating operation, the combustion control part 74 turns on the heating circulation pump 51 (STEP2). At this time, the combustion type heat source device 41 operates according to the temperature of the sent hot liquid in order to execute the heating operation (warm liquid: 60° C.) of the low temperature side heating terminal 5L. In addition, when performing normal connection determination by trial run etc. after construction, it is not necessary to perform heating operation.

The tank control unit 72 controls the distribution valve 23 to be in the bypass-on state, and the pump control unit 73 operates the heat storage circulation pump 18 and the heat pump 31 . Accordingly, the warm liquid in the storage tank 11 is heated to 80° C. while circulating through the condenser 35 in the warm liquid circulation passage 12 for heat storage, and the heat storage (heat pump boiling) of the warm liquid in the storage tank 11 is reduced. is executed (STEP3).

When the storage tank 11 is filled with the 80 degreeC warm liquid ("YES" in STEP4), the combustion control part 74 continues the heating circulation pump 51 in the ON state, and the combustion type heat source device 41 is turned off. Turn it off (STEP5). When the storage tank 11 is not filled with the 80 degreeC warm liquid ("NO" in STEP4), STEP2 is performed again. In addition, when it is not full and the 80 degreeC warm liquid is stored in the storage tank 11 until it is detected by the temperature sensor 14a, you may make it perform the process after STEP5.

The tank control part 72 controls the distribution valve 23 to a bypass-off state, and the pump control part 73 stops the operation|movement of the circulation pump 18 for heat storage and the heat pump 31 (STEP6).

Next, the temperature data detected by the temperature sensors 14a, 25, and 26 is transmitted to the tank control unit 72, respectively, and the tank control unit 72 receives a predetermined temperature (for example, from the temperature detected by the temperature sensor 14a) 5° C.) the subtracted temperature (hereinafter referred to as the subtracted temperature) is calculated, and when the detected temperature of each of the temperature sensors 25 and 26 is higher than the subtracted temperature (“YES” in STEP7), the duration of the state is timed by a timer (not shown), and it is determined whether or not it has continued for a predetermined time (eg, 5 seconds) (STEP8). In addition, you may make it perform STEP7 using the detected temperature only of the temperature sensor 26. As shown in FIG.

When the state in which the detection temperature of each of the temperature sensors 25 and 26 is higher than the subtraction temperature continues for 5 seconds (“YES” in STEP8), the tank control unit 72 determines that the piping is normally connected (STEP9) ), and that effect is displayed on the remote control (STEP10). Moreover, you may make it perform STEP9 and STEP10 when it becomes "YES" in STEP7 without determining continuation of a predetermined time (without executing STEP8). In this embodiment, the tank control part 72 judges the normal connection of each of the hot-liquid circulation paths 13a-13d for heating and the storage tank 11, and in the case of a normal connection state, this is displayed by the remote control which displays that effect. The normal connection determining means of the invention is constituted.

Further, the predetermined time may be determined based on the capacity 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 sensor for detecting the flow rate of the warm liquid is attached to the upstream hot liquid circulation outgoing path 13a for heating. When the capacity of the storage tank 11 from the upper part of the storage tank 11 to the temperature sensor 14a is Q (L: liters) and the flow rate of the hot liquid is F (L/s), the predetermined time period is (Q/ It is preferable to set it to less than F). In this embodiment, the capacity|capacitance of the storage tank 11 is 30 L, Q is 8 L, For example, when F is 1 L/s, predetermined time is set to less than 8 seconds, When F is 2 L/s, predetermined time is set to less than 4 seconds. In addition, either one of the temperature sensors 25 and 26 may be provided, and you may make it perform normal connection determination using the detected temperature of either one.

On the other hand, when at least one of the detected temperatures of the temperature sensors 25 and 26 is equal to or less than the subtracted temperature (“NO” in STEP7), the tank control unit 72 counts the duration of the state with a timer, and a predetermined time ( For example, 60 seconds), it is determined whether or not it continues (STEP11). If it continues for 60 seconds (&quot;YES&quot; in STEP11), the tank control unit 72 determines that the piping is erroneously connected (STEP12), and displays that effect on the remote controller (STEP13). Moreover, you may make it perform STEP12 and STEP13 when it becomes "NO" in STEP7 without determining continuation of a predetermined time (without executing STEP11).

In addition, the tank control unit 72 controls the temperature sensors 25 and 26 when the state in which the respective detected temperatures of the temperature sensors 25 and 26 is higher than the subtraction temperature has not been maintained for 5 seconds (“NO” in STEP8) or the temperature sensors 25 and 26 ), when the state in which at least one of the detected temperatures is equal to or less than the subtraction temperature has not been continued for 60 seconds (“NO” in STEP11), STEP7 is executed again.

In the present embodiment, when the hot liquid is sent from the storage tank 11 full of the 80°C warm liquid to the combustion heat source unit 4, if the piping is normally connected, the temperature sensor 14a in the storage tank 11 ) is supplied to the warm liquid circulation outward path 13a for heating on the upstream side, and the temperature is detected by the temperature sensors 25 and 26 installed in the warm liquid circulation outward path 13a for heating on the upstream side. Accordingly, the temperature detected by the temperature sensor 14a and the temperature detected by the temperature sensors 25 and 26 are approximately equal (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 longer (&quot;YES&quot; in STEP8), the tank control unit 72 determines that the piping is normally connected, and displays this on the remote control.

On the other hand, as shown in FIG. 4, when the piping is incorrectly connected, heat is radiated via the high-temperature side heating terminal 5H and the low-temperature side heating terminal 5L, and is sent from the upstream heating hot liquid circulation return path 13c. In order for the warm liquid (about 60 ° C.) to pass through the upstream hot liquid circulation outgoing path 13 a for heating, the temperature detected by the temperature sensors 25 and 26 is about 60 ° C. “NO” in STEP7). If this state continues for 60 seconds (&quot;YES&quot; in STEP11), the tank control section 72 determines that the pipe is incorrectly connected, and displays that fact on the remote control.

Although normal connection determination is performed using the temperature detected by the temperature sensor 14a in the said embodiment, you may make it perform normal connection determination 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 storage tank 11 from the top of the storage tank 11 to the temperature sensor 14c is 15 L. ) is 20L, and the predetermined time is set based on the calculated value calculated by the above formula (Q/F) using these numerical values.

Although the flow path for freezing prevention is provided in the said embodiment, this invention can be implemented also to the heating apparatus which is not provided with the flow path for freezing prevention.

In the said embodiment, although the combustion type heat source machine is normally driven with electric power, this invention can be implemented also to the heating apparatus which installed the electric heat source drive which replaces with the combustion type heat source machine and drives with normal electric power.

1: Heating unit 2: Storage tank unit
3: Heat pump unit 4: Combustion heat source unit
5H, 5L: heating terminal 11: storage tank
12a: Warm liquid circulation outward path for heat storage 12b: Warm liquid circulation return path for heat storage
12b, 13a: warm liquid circulation outward for upstream heating
13a: circulating hot liquid for downstream heating
13c: warm liquid circulation return path for upstream heating
13d: circulating hot liquid for downstream heating
14a to 14c, 16, 17, 19, 20, 22, 25 to 27: temperature sensor
23: dosing valve 24: bypass flow path
31: heat pump 51: heating circulation pump
72: tank control

Claims (4)

a storage tank for storing fruit;
a tank circulation path communicating the upper part and the lower part of the storage tank;
a tank circulation pump that circulates the heat medium in the storage tank from the lower part of the storage tank to the upper part through the tank circulation path;
a heat pump for heating the heat medium flowing through the tank circuit;
a heating circuit communicating the upper and lower portions of the storage tank through 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 through the heating circuit;
an auxiliary heat source for heating the heat medium flowing through the heating circuit from an upstream side of the heating terminal;
In the normal connection state, the upstream side of the heating circuit is connected to the upper part of the storage tank from the heating point by the auxiliary heat source, and the downstream side from the heating terminal of the heating circuit is connected to the lower part of the storage tank. In the heating device to be,
a 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 from the heating point by the auxiliary heat source of the heating circuit;
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 radiated in the heating terminal, the temperature detected by the heating circuit temperature detection means is determined by the tank temperature detection means. When it is higher than the subtraction temperature obtained by subtracting a predetermined temperature from the detected temperature, it is determined that the normal connection is in the normal connection state, and a normal connection determination means is provided for notifying the heating apparatus.
The method according to claim 1,
The heating circuitry temperature detecting means is provided in a position lower than the connection part of the said heating circuitry path and the said storage tank upper part, The heating apparatus characterized by the above-mentioned.
The method according to claim 1 or 2,
The said normal connection determination means determines that it is the said normal connection state, and notifies it, when the time which the detected temperature by the said heating circuit temperature detection means is higher than the said subtraction temperature continues for predetermined time, The heating apparatus characterized by the above-mentioned.
4. The method according to claim 3,
The heating apparatus according to claim 1, wherein the predetermined time is determined based on a capacity of the storage tank from the upper part of the storage tank to the tank temperature detecting means and a flow rate of the heat medium.

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