JP2001296051A - Hot water storage type hot water heater source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate supplying of hot water capable of being adapted for each of thermal requirements to a thermal radiating heat exchanger even if a plurality of these thermal radiating heat exchangers require concurrently heat when an external thermal radiating part is constituted by a plurality of thermal radiating heat exchangers. SOLUTION: There is provided a hot water feeding heat source device of hot water storing type comprised of a hot water storing tank 1 to which upper part is connected a hot water feeding passage 6; a hot water circulating means E capable of being changed over to a hot water feeding operation state and a thermal radiation operating state; and a control means C for controlling an operation of the hot water circulating means. Connecting a plurality of thermal radiation heat exchangers constitutes an external thermal radiation part. When one of the thermal radiation heat exchangers 42, 43 requires heat, the control means may adjust a temperature of hot water supplied to the thermal radiating part in such a way that it may become a temperature corresponding to the thermal requirement. In turn, when a plurality of thermal radiation heat exchangers concurrently require heat, the control means adjusts a temperature of hot water supplied to the external thermal radiation part in such a way that the temperature becomes the highest temperature in the temperatures corresponding to a plurality of thermal requirements so as to control an operation of the hot water circulation means at the thermal radiation operating state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hot water storage tank having a hot water supply passage connected to an upper portion thereof, and hot water taken out from the bottom of the hot water storage tank heated by heating means, and then the hot water is supplied to the upper portion of the hot water storage tank. The hot water storage operation state in which the hot water is circulated in the supply mode, and the hot water heated by the heating means is supplied to the external heat radiating section, and the entire amount of the hot water passed through the external heat radiating section bypasses the hot water storage tank. The present invention relates to a hot water supply type hot water supply heat source device provided with hot water circulation means capable of switching to a heat radiation operation state in which hot water is circulated in a form directly returning to the heating means, and control means for controlling operation of the hot water circulation means.

[0002]

2. Description of the Related Art The above hot water supply type hot water supply heat source device can utilize the heating function of a heating means in both a hot water storage operation state and a heat radiation operation state. As described in Japanese Patent No. 89369, a hot water storage circulation path for circulating hot water in a hot water storage operation state, a hot water storage water flow path provided with a hot water storage tank in the middle,
A heating means and a circulation pump are connected in a closed loop to connect a heating water passage provided in the middle, and a heat radiation water passage provided with an external heat radiating part in the circulation path for the water storage. When connected in parallel with the water flow path, a flow path switching means is provided at a connection point between the hot water storage circulation path and the heat release hot water flow path, and when the hot water is circulated in the hot water storage operation state, the heat release hot water flow path The flow path is switched so that hot water does not flow, and when circulating hot water in the heat radiation operation state, the flow path is switched so that hot water does not flow into the hot water storing hot water flow path.

[0003]

For this reason, when the external heat radiating section is composed of a plurality of heat radiating heat exchangers, hot and cold water of the same temperature is supplied to each heat radiating heat exchanger in the heat radiating operation state. Therefore, if a plurality of these heat exchangers have a heat demand at the same time, depending on the temperature of the hot water supplied to the external heat radiating part, the temperature of the hot water will be reduced to the temperature of the hot water corresponding to some heat demands. If it is lower than that, it may not be possible to meet the heat demand. The present invention has been made in view of the above circumstances, and in the case where the external heat radiating portion is constituted by a plurality of heat radiating heat exchangers, even if a plurality of heat radiating heat exchangers have a heat request at the same time. Another object of the present invention is to make it easy to supply hot and cold water that can meet each heat demand to a heat radiation heat exchanger.

[0004]

According to a first feature of the present invention, a hot water storage tank having a hot water supply path connected to an upper portion thereof and hot water taken out from the bottom of the hot water storage tank are heated by a heating means. The hot water storage operation state in which the hot water is circulated in a form of supplying the hot water to the upper portion of the hot water storage tank, and the hot water heated by the heating means is supplied to an external radiator, and
Hot water circulation means which can be switched to a heat radiation operation state in which hot water is circulated in a form in which the entire amount of hot water passing through the external heat radiating portion is returned to the heating means bypassing the hot water storage tank, and operation of the hot water circulation means And a control unit for controlling the heat supply, wherein the external heat radiating unit is configured by connecting a plurality of heat radiating heat exchangers in series, and wherein the control unit includes the heat radiating unit. When there is a heat request in one of the heat exchangers, the temperature of the hot water supplied to the external heat radiating unit is adjusted so as to be a temperature corresponding to the heat request, and a plurality of heat radiating heat exchangers are used. At the same time, when there is a heat request, the temperature of the hot water supplied to the external heat radiating unit is adjusted to be the highest temperature among the temperatures corresponding to the plurality of heat requests, and the temperature in the heat radiating operation state is adjusted. Control the operation of the hot and cold water circulation means In that it is configured urchin. [Operation] When the external heat radiating portion is configured by connecting a plurality of heat radiating heat exchangers in series, and when one of the heat radiating heat exchangers requires heat, the heat is supplied to the external heat radiating portion. The temperature of the hot and cold water to be supplied to the external heat radiating unit is adjusted by adjusting the temperature of the hot and cold water to be supplied to the external heat radiating unit when the temperature of the hot and cold water is adjusted to the temperature corresponding to the heat demand. The operation of the hot and cold water circulating means can be controlled in the heat radiation operation state by adjusting the temperature to the highest temperature among the temperatures corresponding to. [Effect] When the external heat radiating portion is configured by connecting a plurality of heat radiating heat exchangers in series, and when there is a simultaneous heat request to a plurality of the heat radiating heat exchangers, the heat is supplied to the external heat radiating portion. Since the temperature of the hot water is adjusted to be the highest temperature among the temperatures corresponding to the plurality of heat demands, the temperature of the hot water supplied to the external heat radiating part is the temperature of the hot water corresponding to some heat demands. Therefore, even if a plurality of heat-exchanger heat exchangers have heat requests at the same time, it is easy to supply hot and cold water to a heat-exchanger heat exchanger at a temperature corresponding to each heat request.

According to a second aspect of the present invention, the plurality of heat radiating heat exchangers are connected so that the heat radiating heat exchanger that requires heat exchange with hot water is located on the upstream side. It is in the point. [Operation] In the operation of the hot water circulation means in the heat radiation operation state, when a plurality of heat radiation heat exchangers connected in series have a heat request at the same time, the temperature of the hot water supplied to the external heat radiation part is determined by the heat request. Of the heat exchangers for heat dissipation, the temperature was adjusted to the highest temperature corresponding to the heat demand of the heat exchanger for heat dissipation located at the most upstream side, and the hot water was exchanged with hot water. The hot water can be supplied to the external heat radiating section in a state where the heat is sequentially flowed from the heat radiating heat exchanger requiring heat exchange to the hot water having a lower temperature. [Effect] In the operation of the hot water circulation means in the heat radiation operation state, the temperature of the hot water supplied to the external heat radiation part gradually decreases while passing through the heat radiation heat exchanger, but heat exchange with hot water is required. Since the hot water can be supplied to the external heat radiating portion in a state where the hot water is sequentially flowed from the heat radiating heat exchanger to the heat radiating heat exchanger that requires heat exchange with the colder water, However, there is little possibility that the temperature of the hot or cold water corresponding to the heat requirement of the heat radiating heat exchanger connected so as to be located downstream is lower.

A third aspect of the present invention is characterized in that a hot water supply tank having a hot water supply path connected to an upper portion thereof and hot water taken out from a bottom portion of the hot water storage tank are heated by a heating means, and then the hot water is supplied to the hot water storage tank. The hot water storage operation state in which hot water is circulated in the form of being supplied to the upper portion of the hot water supply, and the hot water heated by the heating means is supplied to the external heat radiating portion, and the entire amount of hot water passed through the external heat radiating portion is stored in the hot water storage tank. A hot water supply heat source of a hot water supply type provided with hot water circulation means that can be switched to a heat radiation operation state in which hot water is circulated in a form of bypassing and returning directly to the heating means, and control means for controlling operation of the hot water circulation means The apparatus, wherein the external heat radiating unit is configured by connecting a plurality of heat radiating heat exchangers in parallel, and the control unit includes:
The configuration is such that the inflow state of hot water flowing into the heat radiation heat exchanger is individually adjusted for each heat radiation heat exchanger, and the operation of the hot water circulation means in the heat radiation operation state is controlled. It is in. [Function] When the external heat radiating unit is configured by connecting a plurality of heat radiating heat exchangers in parallel, and when a plurality of heat radiating heat exchangers have a heat request at the same time, the requested heat radiating heat is required. The operation of the hot water circulation means in the heat radiation operation state can be controlled by adjusting the flow of hot water into the heat radiation heat exchanger for each exchanger in accordance with the heat demand. [Effect] When the external heat radiating portion is configured by connecting a plurality of heat radiating heat exchangers in parallel, and when a plurality of heat radiating heat exchangers have a heat demand at the same time, the heat radiating portion which has been requested is provided. Since the inflow condition of hot water can be adjusted for each heat exchanger according to the heat demand, even if multiple heat exchangers for heat dissipation have heat demand at the same time, hot water for each heat demand can be exchanged for heat dissipation. Easy to supply to vessel.

According to a fourth feature of the present invention, when the control means has a heat demand for one of the heat radiating heat exchangers, the temperature of the hot water supplied to the external heat radiating portion is increased. The temperature is adjusted to a temperature corresponding to the heat demand, and when a plurality of the heat radiating heat exchangers have a heat demand at the same time, the temperature of hot water supplied to the external heat radiating unit is set to a temperature corresponding to the plurality of heat demands. Of the hot water circulation means in the heat radiation operation state. [Operation] When one of the heat radiating heat exchangers has a heat demand, the temperature of the hot water supplied to the external heat radiating section is adjusted to a temperature corresponding to the heat demand of the heat radiating heat exchanger. When a plurality of heat exchangers for heat radiation have heat requests at the same time, the temperature of hot water flowing into the external heat radiator is adjusted to be the highest temperature among the temperatures corresponding to the plurality of heat requests. ,
The operation of the hot and cold water circulation means in the heat radiation operation state can be controlled. [Effect] When a plurality of heat exchangers for heat radiation have heat requests at the same time, the temperature of hot water supplied to the external heat radiation unit is adjusted to be the highest temperature among the temperatures corresponding to the plurality of heat requests. Therefore, the temperature of the hot water flowing into some of the required heat radiation heat exchangers is lower than the temperature of the hot water corresponding to the heat demand, There is little possibility that it will not be possible to respond.

According to a fifth aspect of the present invention, the inflow temperature of the hot water flowing into the heat radiating heat exchanger in the hot water inflow state is adjusted to a target temperature according to a heat demand. It is in the point. [Function] When a plurality of heat exchangers for heat radiation have a heat demand at the same time, the temperature of hot water flowing into the heat exchanger for heat radiation for each of the heat exchangers for which heat is requested according to the heat demand. The temperature of hot water flowing into the heat exchanger for heat radiation can be adjusted so as to reach the target temperature. [Effect] When a plurality of heat exchangers for heat radiation have a heat request at the same time, the temperature of hot water flowing into each of the heat exchangers for heat radiation requested can be accurately adjusted to a temperature that can respond to the heat request.

According to a sixth aspect of the present invention, the flow rate of hot water flowing into the heat radiating heat exchanger is adjusted separately for each heat radiating heat exchanger to adjust the flow rate to the target temperature. In that it is. [Operation] When a plurality of heat exchangers for heat radiation have a heat demand at the same time, the flow rate of hot water flowing into each heat exchanger for heat radiation requested is adjusted individually, and the heat flows into each heat exchanger for heat radiation. The temperature of the hot and cold water can be adjusted to a temperature that can meet the heat demand. [Effect] Since the flow rate of hot water flowing into each heat-radiating heat exchanger that has been requested can be adjusted individually, it is easier than adjusting the heating amount of hot water to adjust the temperature. Temperature can be adjusted.

According to a seventh aspect of the present invention, an on-off valve is connected to each of supply paths for supplying hot and cold water to the plurality of heat radiating heat exchangers separately, and the on-off time and on-off time of the on-off valve are determined. Is adjusted to adjust the flow rate of hot and cold water flowing into the heat radiation heat exchanger. [Function] When a plurality of heat-radiating heat exchangers have heat requests at the same time, the ratio between the opening time and the closing time of the on-off valve connected to the supply path for supplying hot water to each of the requested heat-radiating heat exchangers. Can be adjusted to adjust the flow rate of hot water flowing into the heat radiation heat exchanger. [Effect] The flow rate of hot and cold water flowing into the heat exchanger for heat radiation can be easily adjusted by using an easily available on-off valve.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a hot water supply heat source device of a storage type according to the present invention is applied to an engine heat pump type cooling and heating hot water supply system will be described with reference to the drawings. This engine heat pump type cooling and heating hot water supply system is shown in FIG.
As shown in FIG. 2, a hot water storage unit A that forms a temperature stratification in the hot water storage tank 1 and supplies hot water stored therein, or heats hot water in the hot water storage tank 1 and radiates heat in the external heat radiating unit 2. And an engine heat pump type cooling / heating device B for cooling / heating the room.

The hot water storage unit A includes a hot water storage unit controller C for controlling the operation of the hot water storage unit A, a hot water storage tank 1, a hot water circulation means E having a circulation path 3 for circulating hot water in the hot water storage tank 1, and a circulation path. A heating unit 4 for heating the hot and cold water flowing through the circulation path 3, an external heat radiating unit 2 for exchanging heat with the hot and cold water flowing through the circulation path 3, and radiating heat. While being circulated in the circulation path 3, heating is performed by the heating unit 4 and heat is radiated by the external heat radiating unit 2.

The hot water storage tank 1 is connected from the bottom to a water supply path 5 for supplying water to the hot water storage tank 1 using tap water pressure, and from the upper part thereof to a hot water supply path 6 for supplying hot water to a bathroom or a kitchen. The water is supplied from the water supply channel 5 to the hot water storage tank 1 only in an amount used in a bathroom or a kitchen. Further, inside the hot water storage tank 1, hot water storage temperature thermistors S1, S2, S3, and S4 as four temperature sensors for detecting the temperature of hot water in the hot water storage tank 1 are provided in a vertically dispersed manner.

The hot water supply path 6 is connected to a mixing water supply path 7 branched from the water supply path 5.
A mixing valve 8 is provided which is capable of adjusting the mixing ratio between hot water and water from the mixing water supply passage 7. A water supply thermistor 9 for detecting water supply temperature is provided at a branch point between the water supply path 5 and the mixing water supply path 7, and a check valve 10 is provided in each of the water supply path 5 and the mixing water supply path 7. ing. Incidentally, an overflow path 11 is connected to the hot water supply path 6, and the air release valve 1 is connected to the overflow path 11.
2 are provided.

Further, on the upstream side of the mixing valve 8 in the hot water supply path 6, the hot water supply path 6
A hot water outlet thermistor 13 for detecting the temperature of hot water supplied to the hot water supply passage 6 is provided.
Further downstream, a mixing thermistor 14 for detecting the temperature of the hot and cold water mixed by the mixing valve 8 and a hot water supply proportional valve 15 for adjusting the flow rate of hot and cold water in the hot water supply passage 6 are provided.

A hot water supply passage 6 downstream of the hot water supply proportional valve 15 has a general hot water supply passage 16 for supplying hot water to a hot water tap in a kitchen or a washroom, and a hot water supply passage 17 for supplying hot water to a bathtub. It is branched, and the hot water path 17 is connected to the bath return path 18 from the bathtub, and the bath return path 18 and the bath going path 1
The hot and cold water is supplied to the bathtub through both paths 9. The general hot water supply path 16 is provided with a hot water supply flow rate sensor 20 for detecting a flow rate of hot water flowing through the general hot water supply path 16, and the hot water path 17 is configured to detect a flow rate of hot water flowing through the hot water supply path 17. Filling water flow sensor 21, filling water electromagnetic valve 2
2. A vacuum breaker 23 and a hot water check valve 24 are provided in this order from the upstream side.

The circulation path 3 and the hot water storage tank 1 are used to return hot water flowing through the circulation path 3 to the hot water storage tank 1 or to take out hot water from the hot water storage tank 1 to the circulation path 3. Are connected at a total of three locations, one at the top and two at the bottom. More specifically, an upper connection path 25 that connects the circulation path 3 and the hot water storage tank 1 is connected to the upper part of the hot water storage tank 1 via the upstream side of the hot water supply path 6, and is connected to the bottom of the hot water storage tank 1. A return path 26 for returning the hot water flowing through the circulation path 3 to the bottom in the hot water storage tank 1 via the downstream side of the water supply path 5; and a takeout path 27 for taking out the hot water from the bottom in the hot water storage tank 1 to the circulation path 3; Are connected.

The upper connection path 25 is provided with an electromagnetic upper opening / closing valve 28, and the return path 26 is provided with a return opening / closing valve 29. By opening the upper opening / closing valve 28, the circulation path is opened. The hot and cold water flowing through the hot water storage tank 1 is supplied to the upper part of the hot water storage tank 1,
The hot water flowing through the circulation path 3 can be returned to the bottom in the hot water storage tank 1 by opening the return on-off valve 29. Incidentally, a drainage channel 30 for draining hot water from the hot water storage tank 1 is connected to the takeout channel 27, and a safety valve 31 and a manual valve 32 are connected in parallel at an intermediate portion of the drainage channel 30. .

The heating section 4 supplies a refrigerant from the engine heat pump type cooling / heating device B to heat the hot water by supplying a refrigerant, and supplies cooling water obtained by collecting engine exhaust heat of the engine heat pump type cooling / heating device B. An exhaust heat utilization type heat exchange unit 34 for heating hot and cold water, and an auxiliary heat exchange unit 35 for heating hot water and hot water by combustion of a burner 36.
Are provided. A heat pump type heat exchange unit 33, an engine exhaust heat utilization type heat exchange unit 34, and an auxiliary heat exchange unit 35 are provided in this order from the upstream side in the circulation direction of the hot and cold water in the circulation path 3.

The auxiliary heat exchanger 35 is provided with a fan 37 for supplying combustion air to a gas-fired burner 36, and heats the hot and cold water flowing through the circulation path 3 by the combustion of the burner 36. Have been. A fuel supply path 38 for supplying a fuel gas to the burner 36 has a gas safety valve 39, a gas proportional valve 40, a gas main valve 4
1 is provided.

The external heat radiating section 2 includes a heating heat exchanger 42 serving as a heat radiating heat exchanger for exchanging heat between hot water flowing through the circulation path 3 and hot water serving as a heating medium for heating. Heat exchange between the hot water flowing through the bath and the bath heat exchanger 43 as a heat exchanger for radiating heat by exchanging heat between the hot water and the hot water in the bathtub often requires heat exchange with high-temperature hot water. The heat exchanger 42 for the bath is located on the upstream side, and the heat exchanger 43 for the bath often exchanges heat with the colder water than the heat exchanger 42 for the heating.
Is located downstream and is connected in series to the circulation path 3, and an electromagnetic heat radiation on-off valve 97 is provided upstream of the heating heat exchanger 42.

By operating the heating pump P 2, the heating heat medium circulated through the heating return path 46 and the heating outgoing path 47 is supplied to the heating heat exchanger 42 through the circulation path 3.
It is configured to heat with hot water flowing through. The heating return path 46 is provided with a heating return thermistor 48 for detecting the temperature of the heating heat medium in the heating return path 46, a makeup water tank 49, and a heating pump P2 in order from the upstream side. Is provided with a heating outgoing thermistor 50 for detecting the temperature of the heating heat medium in the heating outgoing passage 47.

The make-up water tank 49 has an upper limit sensor 51 for detecting the upper limit of the water level and a lower limit sensor 5 for detecting the lower limit.
2, a tank water supply passage 53 for supplying water to the makeup water tank 49 is connected, and the makeup water supply passage 53 is provided with a makeup water solenoid valve 54. In addition, a heating bypass path 55 that supplies the heating heat medium in the heating return path 46 to the heating outflow path 47 bypassing the heating heat exchanger 42 is provided.

The bath heat exchanger 43 includes a bath pump P
By operating the bath 3, the hot water in the bath tub circulating through the bath return path 18 and the bath going path 19 is heated by the hot water flowing through the circulation path 3. In the bath return path 18, a water level sensor 56 for detecting the level of hot water in the bathtub, a bath return thermistor 57 for detecting the temperature of hot water in the bath return path 18, a two-way valve 58, and a bath pump are arranged in this order from the upstream side. P3, a bath water flow switch 59 is provided.

Between the connection point of the circulation path 3 and the connection point of the return path 26 and the connection point of the circulation path 3, the flow of hot and cold water passing through the external heat radiating section 2 to the heat pump type heat exchange section 33 is interrupted. An electromagnetic heat pump opening / closing valve 60 is provided to detect the temperature of hot and cold water flowing through the auxiliary heat exchange unit 35 in a portion between the engine heat recovery type heat exchange unit 34 and the auxiliary heat exchange unit 35. Inlet temperature thermistor 61, circulating flow sensor 62 for detecting circulating flow rate Q of hot water flowing through circulation path 3, circulating pump P <b> 1, electromagnetic auxiliary intermittent opening / closing for intermitting hot water flow to auxiliary heat exchange unit 35 A valve 63 is provided.

The auxiliary intermittent on-off valve 6 in the circulation path 3
3 and an auxiliary heat exchange unit 35, a water quantity sensor 64 for detecting a circulation flow rate Q of the hot water flowing through the auxiliary heat exchange unit 35 is provided, and the auxiliary heat exchange unit 35 and the upper connection path in the circulation path 3 are provided. 25, a water proportional valve 65 for adjusting the circulation flow rate Q of the hot water flowing through the circulation path 3, the boiling temperature of the hot water in the circulation path 3 after being heated by the heating unit 4. T
A hot water storage thermistor 66 for detecting a is provided.

The circulation path 3 includes a heat pump bypass path 67 for allowing the hot and cold water that has passed through the external heat radiating section 2 to bypass the heat pump type heat exchange section 33 and flow into the engine exhaust heat utilization type heat exchange section 34. An auxiliary bypass 68 for circulating the hot and cold water passing through the engine heat recovery type heat exchange unit 34 bypassing the auxiliary heat exchange unit 35 is connected to the auxiliary heat exchange unit 35. A bypass opening / closing valve 69 is provided, and the auxiliary bypass path 6 is provided.
8 is provided with an electromagnetic auxiliary bypass opening / closing valve 70.

The hot and cold water circulating means E includes a circulation path 3, an upper connection path 25, a return path 26, a takeout path 27, a circulation pump P1, an upper opening / closing valve 28, a heat radiation opening / closing valve 97,
The upper opening / closing valve 2 includes a return opening / closing valve 29, a heat pump opening / closing valve 60, a heat pump bypass opening / closing valve 69, an auxiliary intermittent opening / closing valve 63, an auxiliary bypass opening / closing valve 70, and the like.
8. The hot-water storage tank 1 was taken out from the bottom of the hot-water storage tank 1 by opening / closing the heat radiation on-off valve 97, return on-off valve 29, heat pump on-off valve 60, heat pump bypass on-off valve 69, auxiliary intermittent on-off valve 63, and auxiliary bypass on-off valve 70. After the hot water is heated by the heating unit 4, the hot water is circulated in the initial operation circulation state in which the hot water is returned to the bottom of the hot water storage tank 1, and the hot water stores a temperature stratification in the hot water storage tank 1. The hot water taken out from the bottom of the hot water storage tank 1 is heated by the heating unit 4 so as to be formed and stored, and then the hot water is circulated in a hot water storage operation circulation state in which the hot water is supplied to the upper part of the hot water storage tank 1. The hot water storage operation state to be performed and the hot water heated by the heating unit 4 are supplied to the external heat radiating unit 2, and the entire amount of the hot water passing through the external heat radiating unit 2 is directly returned to the heating unit 4 by bypassing the hot water storage tank 1. And it is configured to be freely switchable between the heat-radiating operation state for circulating the hot water in the radiating operation circulation state forms.

The circulation adjusting means F comprises a water supply thermistor 9, an incoming temperature thermistor 61, a circulation flow sensor 62, a water proportional valve 65, a hot water storage thermistor 66, a hot water storage temperature thermistor S1, S2, S3, S4 and the like. The operating means G includes a hot water storage outlet thermistor 13, a mixing valve 8, a hot water supply proportional valve 15, a hot water supply flow sensor 2,
The bath operation means H includes a water level sensor 56, a bath return thermistor 57, a two-way valve 58, a bath pump P3, a bath water flow switch 59, and the like. , Heating operation means J
Are constituted by a heating return thermistor 48, a heating pump P2, a heating going thermistor 50, and the like.

The hot water storage unit control section C includes an upper opening / closing valve 28, a radiation opening / closing valve 97, a bath opening / closing valve 45, a return opening / closing valve 29, a heat pump opening / closing valve 60, a heat pump bypass opening / closing valve 69, an auxiliary intermittent opening / closing valve. 63, by controlling the opening and closing of each of the auxiliary bypass on-off valves 70, the hot water taken out from the bottom of the hot water storage tank 1 is heated by the heating unit 4, and then the hot water is returned to the bottom of the hot water storage tank 1 or the hot water storage tank 1 After the hot water taken out from the bottom of the hot water is heated by the heating unit 4, the hot water is returned to the top of the hot water storage tank 1,
The circulation path 3 is configured to circulate over the heating section 4 and the external heat radiating section 2.

The engine heat pump type cooling / heating device B
Comprises a plurality of indoor units 71 and an outdoor unit 72, and is configured to be able to air-condition a plurality of air-conditioned spaces,
The indoor unit 71, the outdoor unit 72, and the heat pump type heat exchange unit 33 in the hot water storage unit A are connected by a refrigerant pipe 73,
The refrigerant in the engine heat pump type cooling / heating device B can be supplied to the heat pump type heat exchange unit 33. Each of the plurality of indoor units 71 is provided with an indoor heat exchanger 75, an indoor air-conditioning blower 76 that sends out air regulated by the indoor heat exchanger 75 to a space to be air-conditioned, and the like.

The outdoor unit 72 includes electronic expansion valves 74, 8
9, a gas engine 77, a refrigerant compressor 78 driven by the gas engine 77, an accumulator 79, a four-way valve 80,
An outdoor heat exchanger 81, an outdoor air-conditioning blower 82 that ventilates outside air to the outdoor heat exchanger 82, a radiator 83, a radiator blower 84, a heat pump operation control unit D, and the like are provided. A cooling water passage 85 for circulating cooling water for cooling the gas engine 77 with the radiator 83.
The cooling water passage 85 is provided with a radiator pump P
And a cooling water temperature thermistor 95 for detecting the temperature of the cooling water at the engine outlet side. And a heat-dissipation switching mechanism 86 that can be switched between a heating state for supplying heat to the radiator 83 and a heat-dissipating state for supplying heat to the radiator 83 and dissipating heat.

The heat pump operating means K detects the gas engine 77, the electronic expansion valves 74 and 89, the indoor air blower 76, the refrigerant compressor 78, the four-way valve 80, the outdoor air blower 82, and the low pressure side refrigerant pressure. Low pressure detecting means 8
7. The cooling water circulating means L includes a high-pressure detecting means 88 for detecting the high-pressure side refrigerant pressure.
The cooling water passage 91 for heating, the pump P4 for radiator, the blower 84 for radiator, the exhaust heat switching mechanism 86, the cooling water temperature thermistor 95 and the like.

The hot water storage unit control section C and the heat pump operation control section D can transmit and receive control signals such as the fact that the engine heat pump cooling / heating device B is in air-conditioning operation and the drive request to the engine heat pump cooling / heating device B. As shown in FIG. 3, based on commands from an air-conditioning remote controller 93 and a hot-water storage remote controller 92 installed in each room as an air-conditioning target space, air-conditioning cooling operation, air-conditioning heating operation, etc. Air conditioning operation, hot water storage tank 1
The respective operations such as a hot-water storage operation for storing hot and cold water, a heat-dissipation operation for dissipating heat in the external heat-dissipating unit 2, and a hot-water supply priority operation for supplying hot water when the amount of hot water stored in the hot-water storage tank 1 is less than the minimum secured amount are performed. It is configured.

The engine heat pump type cooling / heating device B
When the air-conditioning remote controller 93 receives an air-conditioning request such as an air-conditioning cooling request or an air-conditioning / heating request, the heat pump operation control unit D controls the operation of the heat pump operation means K and the cooling water circulation means L. The compressor 78 is operated by the gas engine 77 based on the air conditioning request, and the air conditioner cooling operation and the air conditioning heating operation are selectively switched by the switching operation of the four-way valve 80, and the indoor unit 71 is operated.
By controlling the opening and closing of the electronic expansion valve 74, air conditioning to each air conditioning target space is switched, and the heat pump operating means K is controlled.

That is, the heat pump operation control unit D
When an air-conditioning cooling request is issued from the air-conditioning remote controller 93, the electronic expansion valve 74 corresponding to the room having the air-conditioning cooling request is opened, and the indoor heat exchanger 75 functions as an evaporator to supply air to the space to be air-conditioned. Is cooled and the outdoor heat exchanger 81 is controlled.
The heat pump operating means K is controlled to perform the air-conditioning and cooling operation so that the air conditioner functions as a condenser and radiates heat to the outside air. Further, when there is a request for air conditioning and heating from the air conditioning remote controller 93, the heat pump operation control unit D opens the electronic expansion valve 74 corresponding to the room to which the request for air conditioning and heating is made to open, thereby causing the indoor heat exchanger 75 to function as a condenser. Then, the air-conditioning / heating operation is executed by controlling the heat pump operating means K so that the temperature of the air supplied to the space to be air-conditioned is controlled and the outdoor heat exchanger 81 functions as an evaporator to absorb heat from the outside air.

The heat pump operation control section D sets the rotation speed of the refrigerant compressor 78 to the detected refrigerant pressure so that the refrigerant pressure becomes the set target pressure in both the air conditioning cooling operation and the air conditioning heating operation. Feedback control is performed based on the deviation from the target pressure, the time constant in the control is set to be sufficiently large, and the increase or decrease of the rotation speed is performed at a gentle speed.

The cooling water circulating means L activates the radiator pump P4, activates the radiator blower 84 and causes the radiator 83 to radiate heat in the air conditioning and cooling operation. When the cooling water flowing through the cooling water passage 85 has a temperature equal to or higher than the set temperature for heating, the exhaust heat switching mechanism 86 is switched to the heating state, and the cooling water is supplied to the heat exchange unit 34 using the engine exhaust heat. I am trying to do it. In the air-conditioning / heating operation, the radiator pump P4 is operated, the radiator blower 84 is operated to release the heat from the radiator 83, and when the heat can be heated by the heat exchange unit 34 using the engine exhaust heat, the heating load is reduced. Small and cooling water channel 85
When the temperature of the cooling water flowing through the heater becomes equal to or higher than the set temperature for heating, the exhaust heat switching mechanism 86 is switched to the heating state, and the cooling water is supplied to the heat exchange unit using the engine exhaust heat.

In the air-conditioning / cooling operation, the indoor heat exchanger 75 functions as an evaporator to control the temperature of air supplied to the air-conditioned space, and the outdoor heat exchanger 81 functions as a condenser to control the outside air. To dissipate heat. In the air-conditioning / cooling operation, the heat pump operation control unit D controls the rotation speed of the gas engine 77 based on the detection information of the low-pressure detection means 87 so that the detected pressure becomes the target pressure for cooling. . Further, in the air-conditioning / cooling operation, the heat pump operation control unit D switches the exhaust heat switching mechanism 86 to the heating state, supplies the cooling water to the engine exhaust heat utilization type heat exchange unit 34, and controls the hot water flowing through the circulation path 3. The engine is heated by exhaust heat.

The flow of the refrigerant in the air-conditioning / cooling operation will be further described. The high-pressure dry vapor refrigerant discharged from the refrigerant compressor 78 is supplied to the outdoor heat exchanger 8 through the four-way valve 80.
1 and condensed in the outdoor heat exchanger 81 by heat exchange with the outside air. Then, the refrigerant that has passed through the condensation step and is sent from the outdoor heat exchanger 81 is supplied to the indoor heat exchanger 75 via the electronic expansion valve 74, and is evaporated by the heat exchange with the air to be cooled in the indoor heat exchanger 75. You. Thereafter, the low-pressure dry vapor refrigerant delivered from the indoor heat exchanger 75 is returned to the suction port of the refrigerant compressor 78 via the four-way valve 80 and the accumulator 79.

In the air conditioning and heating operation, the indoor heat exchanger 75 functions as a condenser to heat and control the temperature of air supplied to the space to be air conditioned, and the outdoor heat exchanger 81 functions as an evaporator to absorb heat from outside air. I am trying to do it. In this air-conditioning / heating operation, the heat pump operation control unit D controls the rotation speed of the gas engine 77 based on the detection information of the high-pressure detection means 88 so that the detected pressure becomes the target pressure for heating. . In this air conditioning and heating operation, the hot water flowing through the circulation path 3 is heated by a heating operation of supplying a high-pressure refrigerant to the heat pump type heat exchange unit 33 through the heating refrigerant pipe 90.

The flow of the refrigerant in the air-conditioning / heating operation will be described. Initial control for controlling the electronic expansion valves 74 and 89 to a predetermined opening degree is performed.
So that the detected pressure of the gas engine 8 becomes the target pressure.
7, the rotation speed of the refrigerant compressor 78 is controlled, and the high-pressure dry vapor refrigerant discharged from the refrigerant compressor 78 is passed through the four-way valve 80 to the indoor heat exchanger 75 and the heat pump heat exchange. It is supplied to the section 33 and condensed by heat exchange with the air to be heated in the indoor heat exchanger 75, and condensed by heat exchange with hot water in the circulation path 3 in the heat pump type heat exchange section 33.

The refrigerant passing from the indoor heat exchanger 75 and passing through the condensation step is supplied to the outdoor heat exchanger 81 via the electronic expansion valve 74 and passed through the condensation step and sent from the heat pump type heat exchange section 33. The refrigerant is supplied to the electronic expansion valve 8
The heat is supplied to the outdoor heat exchanger 81 via the heat exchanger 9, and is evaporated by heat exchange with the outside air in the outdoor heat exchanger 81. Thereafter, the low-pressure dry vapor refrigerant sent from the outdoor heat exchanger 81 is returned to the suction port of the refrigerant compressor 78 via the four-way valve 80 and the accumulator 79.

After the initial control of the electronic expansion valves 74 and 89 is completed, the refrigerant temperature on the downstream side of the indoor heat exchanger 75 and the heat pump type heat exchange section 33 is measured by the refrigerant temperature sensor 9.
The sub-cool control for adjusting the opening of the electronic expansion valves 74 and 89 is executed so that the detected temperature becomes the target temperature obtained by subtracting a predetermined value from the saturated liquid temperature. That is, in the subcool control, the refrigerant is condensed and radiated in the indoor heat exchanger 75 and the heat pump type heat exchange unit 33. As a result, the temperature of the cooled refrigerant is detected by the refrigerant temperature sensor 96, and the detected temperature is set to the high pressure. The opening degrees of the electronic expansion valves 74 and 89 are adjusted so that the temperature is lower by a predetermined value (subcool value) than the saturated liquid temperature obtained from the data stored in the memory in advance based on the detection pressure detected by the detection means 88. I do.

Then, the higher the temperature detected by the refrigerant temperature sensor 96 with respect to the target temperature obtained by subtracting a predetermined value from the saturated liquid temperature, the smaller the degree of opening of the electronic expansion valves 74 and 89, thereby reducing the circulation amount of the refrigerant. The amount of heat radiation per predetermined amount of refrigerant increases accordingly, the temperature detected by the refrigerant temperature sensor 96 decreases, and the pressure detected by the high-pressure detecting means 88 increases to increase the saturated liquid temperature. Refrigerant temperature sensor 9
6 can be made substantially equal to the target temperature. Also, as the temperature detected by the refrigerant temperature sensor 96 is lower than the target temperature, the degree of opening of the electronic expansion valves 74 and 89 is increased, thereby increasing the amount of circulation of the refrigerant. The amount of heat radiation decreases, the temperature detected by the refrigerant temperature sensor 96 increases, and the high-pressure detecting means 8
8, the saturated liquid temperature decreases, and the temperature detected by the refrigerant temperature sensor 96 can be made substantially equal to the target temperature.

The hot water storage unit controller C includes a hot water storage amount detecting means M for detecting the hot water storage amount R in the hot water storage tank 1 and a target hot water storage amount setting means N for setting a target hot water storage amount Ra for storing the hot water in the hot water storage tank 1. And so on. The hot water storage amount detecting means M and the target hot water storage amount setting means N are provided in a program form, and the hot water storage amount detecting means M includes a hot water storage temperature thermistor S1,
The hot water storage temperature thermistors S1, S2, S3, and S4, which detect the lowest temperature of the hot water storage temperature Te among S2, S3, and S4, are determined based on which of the hot water storage temperature thermistors S1, S2, S3, and S4. The hot water storage amount setting means N is configured to detect a predetermined amount of hot and cold water as the hot water storage amount R as an amount corresponding to the detection positions of S3 and S4, and the four hot water storage temperature thermistors S1, S
The hot water storage amount R corresponding to any of 2, 2, S4 is set as the target hot water storage amount Ra.

Then, the hot water storage temperature thermistor S1 at the top
Is the minimum reserved amount Rmin, the hot water storage amount R corresponding to the second hot water temperature thermistor S2 from the top is the small hot water storage amount Rs, and the hot water storage amount R corresponding to the third hot water temperature thermistor S3 from the top. Is set in advance as the middle hot water storage amount Rm, and the hot water storage amount R corresponding to the lowest hot water storage temperature thermistor S4 is set as the maximum hot water storage amount Rmax. By the way, in this embodiment, the minimum secured amount Rmin is 1
7 liters, small hot water volume Rs is 30 liters, medium hot water volume Rm
Is set to 70 liters and the maximum hot water storage amount Rmax is set to 113 liters.

Next, the operation of the hot water storage unit A will be described. Based on a request command from the hot water storage remote control 92 and the operating state of the heat pump operating means K, the hot water storage unit control section C performs hot water circulation means E and circulation adjustment means F. The respective operations of the hot water supply operation means G, the bath operation means H, the heating operation means J, and the auxiliary heat exchange section 34 are controlled to execute respective operations such as a hot water storage operation, a heat radiation operation, and a hot water supply priority operation. Is configured.

The hot water circulation means E will be described in detail. When the hot water circulation means E stores hot water in the hot water storage tank 1, the heat pump hot water storage state (hereinafter referred to as HP hot water storage state) as a hot water storage operation state. And an auxiliary heat source hot water storage state, a heat pump hot water storage initial state (hereinafter, referred to as an HP hot water storage initial state) and an auxiliary heat source hot water storage initial state as a hot water storage initial operation state, and a heat radiation operation state when heat is radiated by the external heat radiation unit 2. , A heating circulation state, and a heating / reheating simultaneous circulation state.

When hot water is stored in the hot water storage tank 1, when the temperature of the hot water heated by the heat pump type heat exchange section 33 or the auxiliary heat exchange section 35 is lower than the hot water storage allowable temperature, the HP hot water initial state or the auxiliary Switch to the heat source hot water storage initial state, circulate hot water in hot water storage tank 1,
When the temperature of the hot water heated by the heat pump type heat exchange unit 33 or the auxiliary heat exchange unit 35 reaches the hot water storage allowable temperature, HP
The state is switched to the hot water storage state or the auxiliary heat source hot water storage state, and the hot water is stored in the hot water storage tank 1. In addition, when heat is radiated by the external heat radiating unit 2, if there is a request for only a reheating request,
The state is switched to the additional heating circulation state, and when there is a request for only the heating request, the state is switched to the heating circulation state, and when both the additional heating request and the heating request are made, the state is switched to the simultaneous heating and additional heating circulation state.

The respective states of the hot and cold water circulation means E will be described below. In the description of the respective states of the hot and cold water circulation means E, the upper opening / closing valve 28, the return opening / closing valve 29, the heat radiating opening / closing valve 97, the heat pump opening / closing valve 60,
Auxiliary intermittent on-off valve 63, heat pump bypass on-off valve 6
9. Regarding the open / close state of the auxiliary bypass on-off valve 70, only the on-off valve to be opened is described, and the on-off valves not described are closed.

In the HP hot water storage state, the upper opening / closing valve 28 and the auxiliary bypass opening / closing valve 70 are opened, and the circulation pump P1 is operated so that the hot water forms a temperature stratification in the hot water storage tank 1 and is stored. And hot water storage tank 1
The hot and cold water extracted from the bottom of the heat pump heat exchanger 3
After heating at 3, the hot water is returned to the upper part of the hot water storage tank 1 bypassing the auxiliary heat exchange unit 35. In the auxiliary heat source hot water storage state, the upper opening / closing valve 28 and the auxiliary intermittent opening / closing valve 63 are opened, and the circulation pump P1 is operated so that hot water forms a temperature stratification in the hot water storage tank 1 to store hot water. After the hot water taken out from the bottom of the hot water storage tank 1 is heated by the auxiliary heat exchange unit 35, the hot water is returned to the upper part of the hot water storage tank 1.

In the initial state of the HP hot water storage, the return on-off valve 29, the radiation on-off valve 97, and the auxiliary bypass on-off valve 70 are opened, and the circulation pump P1 is operated to remove hot water taken out from the bottom of the hot water storage tank 1. After being heated by the heat pump type heat exchange unit 33, the hot water is returned to the bottom of the hot water storage tank 1, bypassing the auxiliary heat exchange unit 35. In the initial state of the auxiliary heat source hot water storage, the return on-off valve 29, the heat radiation on-off valve 97, and the auxiliary intermittent on-off valve 63 are opened, and the circulation pump P1 is operated to supply hot water taken out from the bottom of the hot water storage tank 1. After heating in the heat exchange section 35, the hot water is returned to the bottom of the hot water storage tank 1.

In the additional heating circulation state, when heating is performed by the heat pump type heat exchange section 33, the heat radiation on-off valve 97, the heat pump on-off valve 60, and the auxiliary bypass on-off valve 70 are opened, and the circulation pump P1 is opened. , And the hot water heated by the heat pump type heat exchange unit 33 is radiated by the bath heat exchanger 43, and the entire amount of the hot water bypasses the hot water storage tank 1 and is discharged.
When the heating is performed by the auxiliary heat exchange unit 35, the heat on-off valve 97, the auxiliary intermittent on-off valve 63, and the heat pump bypass on-off valve 69 are opened, and the circulation pump P1 is opened. , And the hot water heated in the auxiliary heat exchange unit 35 is radiated by the bath heat exchanger 43, and the entire amount thereof is bypassed by the hot water storage tank 1 and the heat pump type heat exchange unit 33, and the auxiliary heat is Return to the exchange unit 35
(Circulation for auxiliary heating and reheating).

In the heating circulation state, the heat radiation on-off valve 97, the auxiliary intermittent on-off valve 63 and the heat pump bypass on-off valve 69 are opened, and the circulation pump P1 is opened.
And the hot water heated by the auxiliary heat exchange unit 35 is radiated by the heating heat exchanger 42, and the entire amount is bypassed to the hot water storage tank 1 and the heat pump type heat exchange unit 33 for auxiliary heat exchange. Return to the section 35. In the simultaneous circulation state of the heating and the reheating, the on-off valve 97 for heat radiation, the on-off valve 63 for auxiliary use, and the on-off valve 69 for the heat pump bypass are provided.
, The circulation pump P1 is operated, and the hot water heated by the auxiliary heat exchange unit 35 is supplied to the bath heat exchanger 4.
After the heat is dissipated by the heat exchanger 3 and the heat exchanger 42 for heating, the entire amount is returned to the auxiliary heat exchange unit 35 bypassing the hot water storage tank 1 and the heat pump type heat exchange unit 33.

As an operation of the hot water storage unit control section C,
The hot water storage operation in which the operation is switched to the hot water storage initial operation state or the hot water storage operation state, the heat radiation operation in which the operation is switched to the heat radiation operation state, and the hot water supply priority operation will be described. The hot water storage operation is executed by selecting either a heat pump hot water storage operation (hereinafter, referred to as an HP hot water storage operation) or an auxiliary heat source hot water storage operation, depending on whether or not the engine heat pump type cooling / heating device B is in an air conditioning / heating operation. When the heat pump type cooling / heating device B is in the air-conditioning / heating operation,
When there is a hot water storage request as a heating request instructed by the engine, the auxiliary heat source storage operation for storing hot water by operating the auxiliary heat exchange unit 35 is executed to execute the auxiliary heat source priority operation, and the engine heat pump cooling and heating apparatus B is used for air conditioning and heating. If there is a hot water storage request when not in operation, the heat pump priority operation is performed by executing the HP hot water storage operation for performing the air conditioning and heating operation of the engine heat pump cooling and heating device B to store hot water.

When a request for hot water storage is issued in a state where the air conditioning and heating request from the air conditioning remote controller 93 is canceled during the air conditioning and heating operation of the engine heat pump type cooling and heating device B,
The configuration is such that the HP hot-water storage operation is performed while the operation of the engine heat pump type cooling / heating device B is continued. Also, if there is a request for air conditioning and heating to the engine heat pump type cooling and heating device B during the HP hot water storage operation, the HP hot water storage operation is continued based on the rotation speed of the gas engine 77, the heating load of the room for which heating is required, and the like. It is determined whether the air conditioning capacity of the engine heat pump type cooling / heating device B in a state where the air conditioner has a sufficient or insufficient air conditioning load. When the air conditioning capacity has a sufficient capacity, the HP hot water storage operation is continued and the engine is operated. The air-conditioning / heating operation is performed by the heat pump type cooling / heating device B, and when the air-conditioning capacity is insufficient, the operation is switched from the HP hot-water storage operation to the auxiliary heat source hot-water storage operation, and the air conditioning / heating operation is performed by the engine heat pump type cooling / heating device B. It is configured as follows.

The HP hot-water storage operation in the hot-water storage operation will be specifically described. First, the heating / cooling device B of the engine heat pump type is operated for heating to supply the high-pressure refrigerant to the heat pump type heat exchange unit 33 and the hot / water circulation means E
Is operated in the HP hot water storage initial state, and the hot water in the hot water storage tank 1 is heated by the heat pump type heat exchange unit 33. When the temperature detected by the hot water storage thermistor 66 becomes equal to or higher than the allowable hot water storage temperature, the hot water circulation means E is switched from the HP hot water storage initial state to the HP hot water storage state, and the hot water storage tank 1 is turned on.
The opening of the circulation water proportional valve 65 is adjusted based on the detection information of the hot water storage thermistor 66 so that the temperature of the hot water stored in the upper part of the hot water becomes the hot water storage set temperature.

In this way, the hot water in the hot water storage tank 1 is stored while forming a temperature stratification, and when the hot water storage amount of the hot water storage tank 1 reaches the target hot water storage amount set by the hot water storage remote controller 92 or the like, the set time hot water storage tank 1 After the hot water storage is continued, the operation of the engine heat pump cooling / heating device B is stopped, the operation of the circulation pump P1 is stopped, and the open / close valve is closed to stop the operation of the water / water circulation means E. Let it. By the way, the target hot water storage is "small",
One of "medium" and "full" can be selected. For example, when "medium" is selected as the target hot water storage amount, when the central thermistor S3 detects a temperature lower than the set hot water storage temperature by the set temperature, the hot water storage It is configured to detect that the hot water storage amount of the tank 1 has reached the target hot water storage amount.

A specific description will be given of the auxiliary heat source hot water storage operation in the hot water storage operation.
3. Opening each of the return on-off valve 29 and the heat radiation on-off valve 97, the auxiliary bypass on-off valve 70, the upper on-off valve 2
8. The heat pump on-off valve 60 and the heat pump bypass on-off valve 69 are each closed to heat the hot water taken out from the bottom of the hot water storage tank 1 by the auxiliary heat exchange unit 35, and then the hot water is transferred to the bottom of the hot water storage tank 1. In the initial state of hot water storage in which the hot water is circulated in the initial state of the auxiliary heat source hot water storage mode, the auxiliary intermittent on-off valve 63 and the upper on-off valve 28 are each opened, and the auxiliary bypass on-off valve 70 and the return on-off valve 2
9, the heat pump on-off valve 60, the heat pump bypass on-off valve 69, and the heat radiation on-off valve 97 are each closed, and the hot and cold water taken out from the bottom of the hot water storage tank 1 is supplied to the auxiliary heat exchange unit 3.
After heating at 5, the hot water is switched to a hot water storage operation in which hot water is circulated in an auxiliary heat source hot water storage state in which the hot water is supplied to the upper portion of the hot water storage tank 1.

That is, the hot water storage unit controller C determines that the boiling temperature Ta exceeds the temperature 8 ° C. higher than the target temperature Tb for hot water storage or the boiling temperature Ta exceeds the temperature 15 ° C. lower than the target temperature Tb for hot water storage. Until continuously detected by the hot water storage thermistor 66 for one second, the hot water storage initial operation of circulating the hot water at the circulation flow rate of 1 liter / min in the initial state of the auxiliary heat source hot water storage is performed, and is 8 ° C. higher than the hot water storage target temperature Tb. If the boiling temperature Ta exceeding the temperature or the boiling temperature Ta exceeding the temperature 15 ° C. lower than the target temperature Tb for hot water storage is continuously detected for one second, the state is switched to the auxiliary heat source hot water storage state and the boiling temperature Ta is increased. Is configured to control the circulating flow rate Q so that the temperature becomes the hot water storage target temperature Tb.

In this way, the hot water in the hot water storage tank 1 is stored while forming a temperature stratification, and when the hot water storage amount of the hot water storage tank 1 reaches the target hot water storage amount set by the hot water storage remote control 92 or the like, the set time hot water storage tank 1 Then, the operation of the auxiliary heat exchange unit 35 is stopped, the operation of the circulation pump P1 is stopped, and the open / close valve is closed to stop the operation of the hot water circulation means E. .

In the heat dissipation operation, when there is a request for only the reheating request, the reheating operation is executed. When there is a request for only the heating request, the heating operation is executed. When there is, it is configured to execute the simultaneous heating and reheating operation.

More specifically, the reheating operation in the heat radiation operation will be described. The hot water circulation means E is switched to the reheating circulation state, and the fan 37 is set so that the temperature detected by the hot water storage thermistor 66 becomes the set temperature for reheating. The rotation speed and the degree of opening of the gas proportional valve 40 are adjusted, and the bath pump P3 is operated to supply hot and cold water in the bathtub to the bath return path 18.
And, it circulates at a constant circulation flow rate through the bath going path 19. Then, the hot water in the bath tub is heated and refired by the bath heat exchanger 43. When the detected temperature of the bath return thermistor 57 becomes equal to or higher than the set temperature for reheating, the operation of the bath pump P3 is stopped and the auxiliary The operation of the heat exchange unit 35 and the operation of the hot and cold water circulation means E are stopped.

The heating operation in the heat dissipation operation will be specifically described. The hot water circulation means E is switched to the heating circulation state, and the rotation speed of the fan 37 and the rotation speed of the fan 37 are adjusted so that the temperature detected by the hot water storage thermistor 66 becomes the heating set temperature. While adjusting the opening of the gas proportional valve 40, the heating pump P2 is operated to transfer the heat medium from the heating terminal to the heating return path 46.
In addition, the heat is circulated at a constant circulation flow rate through the heating outflow path 47, and the heating medium is heated by the heating heat exchanger 42 and supplied to the heating terminal.

More specifically, the simultaneous operation of heating and additional heating in the heat radiation operation will be described. The hot water circulation means E is switched to the simultaneous circulation state of heating and additional heating, and the temperature detected by the hot water storage thermistor 66 is used for simultaneous heating and additional heating. The rotation speed of the fan 37 and the gas proportional valve 40
And the bath pump P3 is operated to supply hot and cold water in the bathtub to the bath return path 18 and the bath going path 19.
And the heating pump P2 is operated to circulate the heat medium from the heating terminal through the heating return path 46 and the heating return path 47. Then, the hot water in the bathtub is additionally heated, and the heating medium heated by the heating heat exchanger 42 is supplied to the heating terminal.

The hot water supply priority operation is executed when hot water is supplied to a hot water tap or the like when the hot water storage amount of the hot water storage tank 1 is less than the minimum secured amount, and the hot water circulation means E is switched to the auxiliary heat source hot water storage state, and the auxiliary heat exchange is performed. While supplying hot water from the upper connection path 25 to the hot water supply path 6 while heating the hot water in the section 35, the hot water supply target temperature,
Based on the detection information of the hot water storage outlet thermistor 13 and the water supply thermistor 9, the opening of the mixing valve 8 is adjusted so that the temperature of the hot water to be supplied becomes the hot water supply target temperature, and based on the detection information of the mixing thermistor 14,
The opening degree of the mixing valve 8 is finely adjusted based on the deviation between the detected temperature and the hot water supply target temperature, so that hot water at the hot water supply target temperature is supplied.

By the way, when filling the bathtub with hot water,
Similar to the hot water supply priority operation, when the hot water storage amount of the hot water storage tank 1 is less than the minimum secured amount, the hot water supply is performed when hot water is supplied to a hot water tap or the like, and based on the hot water supply target temperature, the hot water storage outlet thermistor 13 and the detection information of the water supply thermistor 9. The opening of the mixing valve 8 is adjusted so that the temperature of the hot water becomes the hot water supply target temperature, and the mixing is performed based on the detection information of the mixing thermistor 14 and the deviation between the detected temperature and the hot water supply target temperature. The opening degree of the valve 8 is finely adjusted, the hot water filling electromagnetic valve 22 is opened, and the hot water adjusted to the hot water supply target temperature by the mixing bubble 8 is returned to the bath return path 1.
The bath water is supplied to the bath tub from both of the bath 8 and the bath going path 19, and when a set amount of hot water is supplied into the bath tub, the hot water electromagnetic valve 22 is closed.

Regarding the control operation of the hot water storage unit A,
A description will be given based on the flowcharts of FIGS. The hot water storage unit A, as shown in the flowchart of FIG.
If the amount of hot water stored in the hot water storage tank 1 is less than the minimum secured amount and the hot water tap is being opened and hot water is being supplied, the hot water supply priority operation is performed, and the amount of hot water stored in the hot water storage tank 1 is equal to or greater than the minimum secured amount. Or, if the hot water supply is not being performed, if the hot water supply priority operation is being performed, the operation of the auxiliary heat exchange unit 35 and the operation of the circulation pump P1 are stopped to execute the hot water supply priority operation stop processing. And if there is a heat dissipation request such as a heating request or a reheating request,
The heat dissipation operation is performed, and when there is a hot water storage request, the hot water storage operation is performed.

The control operation of the heat dissipation operation will be described with reference to the flowchart of FIG. 5. The hot water storage amount of the hot water storage tank 1 is less than the minimum secured amount, and the hot water tap is opened to supply hot water. If there is, hot water supply priority operation is executed. Whether the amount of hot water stored in hot water storage tank 1 is greater than the minimum
If the hot water supply priority operation is not being performed, the operation of the auxiliary heat exchange unit 35 and the operation of the circulation pump P1 are stopped to execute the hot water supply priority operation stop processing.

When there is a reheating request and no heating request, the reheating operation is executed. When both the reheating request and the heating request are made, the simultaneous heating and reheating operation is executed, and the reheating request is executed. If there is no heating request and there is a heating request, the heating operation is executed. In this manner, depending on whether one or both of the reheating request and the heating request are requested, in order to respond to the request, the reheating operation, the heating operation, and the respective operations of the heating / reheating simultaneous operation are performed,
When either or both of the additional heating request and the heating request are satisfied and the request is completed, a heat radiation stop process for stopping the operation of the hot and cold water circulation means E and the auxiliary heat exchange unit 35 is executed.

The control operation of the hot water storage operation will be described with reference to the flowchart of FIG. 6. When the hot water storage amount of the hot water storage tank 1 is less than the minimum secured amount and the hot water tap is opened to supply hot water. If there is, hot water supply priority operation is executed. Whether the amount of hot water stored in hot water storage tank 1 is greater than the minimum
If the hot water supply priority operation is not being performed, the operation of the auxiliary heat exchange unit 35 and the operation of the circulation pump P1 are stopped to execute the hot water supply priority operation stop processing. Then, if there is a heat release request of either the additional heating request or the heating request, the heat release operation is executed, and if there is no heat release request, the HP hot water storage operation is executed.

As described above, when the hot water storage amount of the hot water storage tank 1 reaches the target hot water storage amount in either the HP hot water storage operation or the auxiliary heat source hot water storage operation, the hot water storage in the hot water storage tank 1 is continued for a set time, and then the engine heat pump type is used. Hot water storage operation stop processing for stopping the operation of the cooling / heating device B or the auxiliary heat exchange unit 35, stopping the operation of the circulation pump P1 and closing the open / close valve to stop the operation of the hot / water circulation means E Execute

The reheating operation will be described with reference to the flowcharts of FIGS. As shown in FIG. 7, the reheating operation is executed when the detected temperature Tf of the bath return thermistor 57 continuously detects 35 ° C. or less for 1 second, and the hot water storage remote controller 92 instructs the hot water storage remote controller 92 to perform the appropriate temperature operation of the bath. When the “switch” is turned ON or the automatic bath operation is not commanded, the auxiliary heat exchange unit 35
A supplementary heating reheating operation is performed in which heating and reheating is performed, and when the automatic bath operation is instructed, the heat pump reheating operation in which the heating and reheating is performed by the heat pump type heat exchange unit 33 (
Hereinafter, referred to as HP reheating operation).

In the HP reheating operation, as shown in FIG. 8, the timer 94 is reset, a heat pump operation request signal is output to the heat pump operation control section D, and the heat pump operation control section D outputs a signal indicating the operation state. If the insufficient capacity signal indicating the insufficient heating capacity of the heat pump is input, the output of the heat pump operation request signal is stopped and the auxiliary heating reheating operation is performed (steps # 1 to # 3).
# 10, # 11) If no capacity shortage signal has been input, the system is switched to the HP additional heating circulation state and the circulation pump P
1 and the opening of the water proportional valve 65 is adjusted so that the circulation flow rate Q becomes the target flow rate (6 liters / min), and the bath heat exchanger 43 heats the water in the bathtub. Refire (Step # 4).

The heat pump operation control unit D outputs a heat pump operation signal indicating that the engine heat pump cooling / heating device B is operating as a signal indicating the operation state, and five minutes have elapsed since the output of the heat pump operation request signal. If it is not input, stop the output of the heat pump operation request signal and execute the auxiliary heating reheating operation
(Steps # 5, # 8 to # 11). Further, even if the heat pump operation signal is input, the bath return thermistor 57
If the boiling temperature Ta lower than the temperature 15 ° C. higher than the bath return temperature Tf detected by the hot water storage thermistor 66 is continuously detected for 10 minutes, the output of the heat pump operation request signal is stopped and the auxiliary heating The heating operation is executed (steps # 6, # 10, # 11), and when the bath return temperature Tf reaches the set temperature for additional heating, the HP additional heating operation is terminated (step # 7).

As shown in FIG. 9, the auxiliary heating and reheating operation is switched to the auxiliary heating and additional heating circulation state to operate the circulating pump P1, and the circulating flow rate Q is set to the target flow rate (see FIG. 9).
The opening degree of the water proportional valve 65 is adjusted so as to be 10 liters / min, and a temperature of 70 ° C. is required as the boiling temperature by the auxiliary heat exchange unit 35. In addition, the heat pump operation control unit D requests the boiling temperature of 70 ° C.
The rotation speed of the fan 37 and the opening of the gas proportional valve 40 are adjusted so that the temperature detected by the hot water storage thermistor 66 becomes the boiling temperature. Then, when the bath return temperature Tf reaches the set temperature for additional heating, the auxiliary heating additional heating operation ends.

The heating operation will be described with reference to the flowchart of FIG. When the heating operation is commanded, the output of the heat pump operation request signal is stopped, the state is switched to the heating circulation state, the circulation pump P1 is operated, and the water flow rate is adjusted so that the circulation flow rate Q becomes the target flow rate (6 l / min). Adjust the opening of the valve 65 (Step # 2
1, # 22), and supplies the hot and cold water heated by the auxiliary heat exchange unit 35 to the heating heat exchanger 42.

If it is required to execute the heating high temperature 80 ° C. control, a temperature of 80 ° C. is required as the boiling temperature by the auxiliary heat exchange unit 35 (steps # 23 and # 2).
4) When the execution of the heating low temperature 60 ° C. control is required, the boiling temperature of the auxiliary heat exchange unit 35 is set to 70 ° C.
(Steps # 25 and # 26), and if the execution of the heating low-temperature 70 ° C. control is required, a temperature of 80 ° C. is required as the boiling temperature by the auxiliary heat exchange unit 35.
(Steps # 27 and # 28) If the execution of the heating high temperature 60 ° C. control is required, a temperature of 70 ° C. is required as the boiling temperature by the auxiliary heat exchange unit 35 (Step #)
29, # 30). The heat pump operation control unit D adjusts the rotation speed of the fan 37 and the opening of the gas proportional valve 40 in accordance with the required boiling temperature so that the temperature detected by the hot water storage thermistor 66 becomes the boiling temperature. I do. When the heating operation command is released, the heating operation is terminated (step # 31).

Therefore, when there is a heat demand for one of the heating heat exchanger 42 and the bath heat exchanger 43, the heat pump operation control unit D raises the boiling water supplied to the external heat radiating unit 2. The temperature Ta is adjusted to be a required temperature corresponding to the heat requirement, and the operation of the hot and cold water circulating means E in the heat radiation operation state is controlled.

The simultaneous operation of heating and reheating as shown in FIG.
This will be described with reference to the flowchart of FIG. When the simultaneous operation of heating and reheating is instructed, the output of the heat pump operation request signal is stopped, the state is switched to the simultaneous circulation state of heating and reheating, and the circulation pump P1 is operated. min), the opening of the water proportional valve 65 is adjusted (steps # 41 and # 42),
The hot and cold water heated by the auxiliary heat exchanger 35 is supplied to the heat exchanger 4 for heating.
2 and the bath heat exchanger 43.

When the execution of the heating high temperature control of 80 ° C. is required, regardless of whether the required temperature of the additional heating by the auxiliary heat exchange unit 35 is 70 ° C.
A temperature of 80 ° C. is required as the boiling temperature by the auxiliary heat exchange unit 35 (steps # 43 and # 44), and the heating low temperature 60
If the execution of the temperature control is required, the auxiliary heat exchange unit 3
5 is required to be 70 ° C. as the boiling temperature according to Step 5 (Steps # 45 and # 46). If execution of the heating low-temperature 70 ° C. control is required, the auxiliary heat exchange unit 35 sets the boiling temperature to 80 ° C. Request temperature (Step # 47,
# 48) When the execution of the heating high temperature 60 ° C. control is required, the boiling temperature of the auxiliary heat exchange unit 35 is set to 7
Request a temperature of 0 ° C. (Steps # 49, # 50).
The heat pump operation control unit D adjusts the rotation speed of the fan 37 and the opening of the gas proportional valve 40 in accordance with the required boiling temperature so that the temperature detected by the hot water storage thermistor 66 becomes the boiling temperature. I do. Then, when the heating operation command is released or when the bath return temperature Tf reaches the set temperature for additional heating, the simultaneous heating and additional heating operation is terminated (steps # 51 and # 52).

Accordingly, when there is a simultaneous heat demand from the heating heat exchanger 42 and the bath heat exchanger 43, the heat pump operation control unit D determines the boiling temperature Ta of the hot and cold water supplied to the external heat radiating unit 2. Is controlled so as to be the highest temperature among the temperatures corresponding to the heat demand of the above, and to control the operation of the hot and cold water circulation means E in the heat radiation operation state.

[Second Embodiment] The second embodiment will be described below, but the description of the same components as the first embodiment will be omitted. FIG. 12 shows an embodiment in which the external heat radiating unit 2 is configured by connecting the heating heat exchanger 42 and the bath heat exchanger 43 in parallel, and the circulation path 3 includes the heating heat exchanger 42. The heating circuit 3a is branched into a heating circuit 3a as a supply path for supplying hot and cold water and a bath circuit 3b as a supply path for supplying hot water to the bath heat exchanger 43. An electromagnetic heating on-off valve 44 is provided upstream of the exchanger 42.
Is connected, and an electromagnetic bath on-off valve 45 is connected upstream of the bath heat exchanger 43 in the bath circulation path 3b.

Therefore, the hot and cold water circulation means E includes the circulation path 3, the upper connection path 25, the return path 26, the take-out path 27, the circulation pump P1, the upper opening / closing valve 28, the heating opening / closing valve 44,
It comprises a bath on-off valve 45, a return on-off valve 29, a heat pump on-off valve 60, a heat pump bypass on-off valve 69, an auxiliary intermittent on-off valve 63, an auxiliary bypass on-off valve 70, etc., and an upper on-off valve 28, a heating on-off valve 44. Bath on-off valve 45, return on-off valve 29, heat pump on-off valve 60,
Heat pump bypass on-off valve 69, auxiliary intermittent on-off valve 6
3. Opening / closing operation of the auxiliary bypass valve 70 causes an initial operation state for hot water storage to circulate hot water in the initial operation circulation state, an operation state for hot water storage to circulate hot water in the circulation state for hot water storage operation, and a circulation state for heat dissipation operation. It is configured to be freely switchable to a heat radiation operation state in which hot water and water are circulated.

The hot water storage unit control section C includes an upper opening / closing valve 28, a heating opening / closing valve 44, a bath opening / closing valve 45, a bath opening / closing valve 45, a return opening / closing valve 29, and a heat pump opening / closing valve 6.
0, by controlling the opening and closing of the heat pump bypass on-off valve 69, the auxiliary intermittent on-off valve 63, and the auxiliary bypass on-off valve 70, the hot and cold water taken out from the bottom of the hot water storage tank 1 is heated by the heat exchange unit 4, Hot water storage tank 1
After the hot water taken out from the bottom of the hot water storage tank 1 is heated by the heat exchange unit 4, the hot water is returned to the top of the hot water storage tank 1, and the circulation path 3 is connected to the heat exchange unit 4 and the external heat radiating unit. 2 and so on.

The respective states of the hot and cold water circulation means E will be further described. In the description of each state of the hot and cold water circulation means E, the upper opening / closing valve 28, the return opening / closing valve 2
9, heating on-off valve 44, bath on-off valve 45, heat pump on-off valve 60, auxiliary intermittent on-off valve 63, heat pump bypass on-off valve 69, and auxiliary bypass on-off valve 70
For the open / closed state, only the open / close valve to be opened is described,
On-off valves not listed shall be closed.

In the HP hot water storage state, the upper open / close valve 28
And the auxiliary bypass on-off valve 70 is opened, the upper on-off valve 28 and the auxiliary intermittent on-off valve 63 are opened in the auxiliary heat source hot water storage state, and the return on-off valve 29 and the heating on-off valve in the HP hot water storage initial state. In the initial state of the auxiliary heat source hot water storage, the return on-off valve 29, the on-off valve for heating 44, and the on-off valve 63 for auxiliary are opened.

In the additional heating circulation state, when heating is performed by the heat pump type heat exchange section 33, the bath on-off valve 4
5. When the heat pump on-off valve 60 and the auxiliary bypass on-off valve 70 are opened (HP additional heating circulation state) and the auxiliary heat exchange unit 35 heats, the bath on-off valve 45 and the auxiliary intermittent on-off valve 63 And heat pump bypass valve 6
9 is opened (circulation state for auxiliary heating and reheating).

In the heating circulation state, the heating on-off valve 4
4. Opening the auxiliary intermittent on-off valve 63 and the heat pump bypass on-off valve 69, and in the simultaneous circulation state of heating and reheating, the heating on-off valve 44, the bath on-off valve 45, the auxiliary intermittent on-off valve 63, and the heat pump bypass On-off valve 69
Is opened.

The auxiliary heating additional heating operation and the heating operation are operated in the same manner as in the first embodiment. Therefore, the heat pump operation control unit D includes the heating heat exchanger 42 and the bath heat exchanger 4.
3 has a heat demand, the external heat radiating portion 2
The heat dissipation operation is performed by adjusting the rotation speed of the fan 37 and the opening degree of the gas proportional valve 40 in the auxiliary heat exchange unit 35 so that the boiling temperature Ta of the hot water supplied to the tank becomes the required temperature corresponding to the heat demand. It is configured to control the operation of the hot and cold water circulation means E in the state.

Hereinafter, the simultaneous operation of heating and reheating will be described with reference to the flowchart of FIG. heating·
When the simultaneous heating operation is commanded, the output of the heat pump operation request signal is stopped, the state is switched to the simultaneous circulation state of heating and additional heating, the circulation pump P1 is operated, and the circulation flow rate Q is set to the target flow rate (10 liter / min). The opening of the water proportional valve 65 is adjusted so as to satisfy (Steps # 61 and # 6).
2) The hot and cold water heated in the auxiliary heat exchange unit 35 is supplied to the heating heat exchanger 42 and the bath heat exchanger 43, and the auxiliary heat exchange unit 35 supplies an additional temperature of 70 ° C. The required heating temperature is set (step # 63).

If the execution of the heating high temperature control at 80 ° C. is required, the required heating temperature of 80 ° C. is set as the boiling temperature by the auxiliary heat exchange unit 35 (step #).
64, # 65), when the execution of the heating low-temperature 60 ° C. control is required, the required heating temperature of 70 ° C. is set as the boiling temperature by the auxiliary heat exchange unit 35 (step # 6).
6, # 67), when the execution of the heating low-temperature 70 ° C. control is required, the required heating temperature of 80 ° C. is set as the boiling temperature by the auxiliary heat exchange unit 35 (step # 68,
# 69) If the execution of the heating high temperature 60 ° C. control is required, the boiling temperature of the auxiliary heat exchange unit 35 is set to 7
Set the required heating temperature of 0 ° C (Steps # 70, #
71) Then, hot water temperature control is executed (step # 72).

The hot water temperature control is performed by the heating heat exchanger 42.
The inflow temperature of the hot water flowing into each of the heat exchangers 42 and 43 as the inflow state of the hot water flowing into the heat exchanger 43 and the bath heat exchanger 43 is set to a target temperature according to the heat demand.
The heating / opening valve 44 is controlled by adjusting the hot water circulation means E in the heat radiation operation state by adjusting the water circulation means E in the heat radiation operation state. By adjusting the ratio between the opening time and the closing time of the bath on-off valve 45 separately, and adjusting the flow rate of hot water flowing into each of the heat exchangers 42 and 43, the target temperature according to the heat demand can be obtained. Adjust as follows.

That is, the boiling temperature Ta of the hot and cold water supplied to the external heat radiating section 2 is determined by the rotational speed of the fan 37 and the gas proportional valve 40 in accordance with the higher one of the required temperature for additional heating and the required temperature for heating. Is adjusted, and the auxiliary heat exchange unit 35 is operated. Then, the required heat amount per unit time for heating of hot and cold water required in the heating heat exchanger 42 is determined by the target heating temperature of the heating heat medium and the heating return of the heating heat medium detected by the heating return thermistor 48. It is calculated from the temperature and the constant circulation flow rate of the heating heat medium, and the calculated amount of hot and cold water per unit time for heating is calculated by the heating heat exchanger 4.
The heating medium is heated by adjusting the ratio between the opening time and the closing time of the heating on-off valve 44 so that the heating medium flows into the heating medium 2.

The required amount of heat per unit time for bath water required in the bath heat exchanger 43 is determined by the target heating temperature of the bath water and the bath return temperature detected by the bath return thermistor 57. And the constant circulation flow rate of the bath water, and the opening and closing times of the bath on-off valve 44 so that the calculated required amount of hot water flows into the bath heat exchanger 43 per unit time for the bath. Adjust the ratio and heat the bath water.

Accordingly, when there is a simultaneous heat demand for the heating heat exchanger 42 and the bath heat exchanger 43, the heat pump operation control unit D determines the temperature of the hot water supplied to the heat exchangers 42 and 43. The operation of the hot and cold water circulation means E in the heat radiation operation state is controlled by adjusting the temperature to the highest temperature among the temperatures corresponding to the heat demands. When the heating operation command is released,
Alternatively, when the bath return temperature Tf reaches the set temperature for additional heating, the simultaneous operation of heating and additional heating is terminated (steps # 73 and # 7).
4).

[Other Embodiments] In the first embodiment, two heat-radiating heat exchangers are connected in series. However, three or more heat-radiating heat exchangers may be connected in series. 2. In the second embodiment, two heat radiation heat exchangers are connected in parallel. However, three or more heat radiation heat exchangers may be connected in parallel.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot water supply heat source device (hot water storage unit) of a hot water storage type.

FIG. 2 is a schematic configuration diagram of a hot water supply heat source device (engine heat pump type cooling / heating device) of a hot water storage type.

FIG. 3 is a control block diagram.

FIG. 4 is a flowchart showing a control operation.

FIG. 5 is a flowchart showing a control operation.

FIG. 6 is a flowchart showing a control operation.

FIG. 7 is a flowchart showing a control operation.

FIG. 8 is a flowchart showing a control operation.

FIG. 9 is a flowchart showing a control operation.

FIG. 10 is a flowchart showing a control operation.

FIG. 11 is a flowchart showing a control operation.

FIG. 12 is a hot water supply type hot water supply heat source device according to a second embodiment (
Schematic configuration of hot water storage unit)

FIG. 13 is a flowchart showing a control operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 External heat radiating part 4 Heating means 6 Hot water supply path 42 Heat radiating heat exchanger 43 Heat radiating heat exchanger 44 Open / close valve 45 Open / close valve C Control means E Hot water circulation means

 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 000221834 Toho Gas Co., Ltd. 19-18 Sakuradacho, Atsuta-ku, Nagoya-shi, Aichi (71) Applicant 000196680 Seibu Gas Co., Ltd. 1-17-1 Chiyo, Hakata-ku, Fukuoka-shi, Fukuoka No. 1 (72) Inventor Toru Fukuchi Osaka Gas Co., Ltd. 1-3-1 Kitako Shiratsu, Konohana-ku, Osaka-shi (72) Inventor Sakunari Sakuni 1-3-1 Kitako-Shiratsu, Konohana-ku, Osaka-shi Osaka Within Gas Co., Ltd. (72) Inventor Yasuhito Hashizume 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka Herman Co., Ltd. (72) Inventor Toshihiro Kawachi 1-1-52, Oka, Minami-shi, Minato-ku, Osaka, Osaka Shares (72) Inventor Yasushi Fujikawa 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka-shi Herman Inc. (72) Inventor Yoshio Fujimoto Osaka-shi, Osaka 1-152 Oka, Minami-shi, Minami-ku, Harman Co., Ltd. (72) The inventor's office Kenji 1-1-51, Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka Harman Co., Ltd. (72) Tomoya Sakiishi, Osaka, Osaka 1-152 Oka, Minami-shi, Minato-ku, Tokyo Harman Co., Ltd. (72) Inventor Kenichi Tanoka 1-5-20, Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Kazuya Yamaguchi, inventor Kazuya Yamaguchi Tokyo Metropolitan Government (72) Inventor Naoji Shiya 19-18 Sakuradacho, Atsuta-ku, Nagoya-shi, Aichi Prefecture In-House Gas Co., Ltd. (72) Inventor Mikio Ito Nagoya, Aichi Prefecture 19--18 Sakurada-cho, Atsuta-ku, East Japan Gas Co., Ltd. (72) Inventor Michinori Kawahara 1-17-1 Chiyo, Hakata-ku, Fukuoka City, Fukuoka Prefecture Inside Seibu Gas Co., Ltd.

Claims (7)

[Claims] 1. A hot water storage tank having a hot water supply path connected to an upper portion thereof, and hot water taken out from the bottom of the hot water storage tank is heated by heating means, and then the hot water is supplied to the upper portion of the hot water storage tank. The hot water storage operation state to be circulated and the hot water heated by the heating means are supplied to the external heat radiating section, and the entire amount of the hot water passed through the external heat radiating section is directly returned to the heating means by bypassing the hot water storage tank. A hot water supply heat source device of a hot water supply type provided with hot water circulation means that can be switched to a heat radiation operation state for circulating hot water in a form, and control means for controlling operation of the hot water circulation means, Is configured by connecting a plurality of heat radiating heat exchangers in series, and the control unit is configured to supply water to the external heat radiating unit when one of the heat radiating heat exchangers has a heat request. The temperature of the heat Was adjusted to a temperature corresponding to the calculated, when a plurality of the heat radiating heat exchanger is heat requirements at the same time,
The temperature of the hot water supplied to the external heat radiating unit is adjusted to be the highest temperature among the temperatures corresponding to the plurality of heat requests, and the operation of the hot water circulating means in the heat radiating operation state is controlled. Hot water supply heat source device configured as follows. 2. The hot-water storage type according to claim 1, wherein the plurality of heat-radiating heat exchangers are connected so that the heat-radiating heat exchanger that requires heat exchange with hot water is located on the upstream side. Hot water supply heat source equipment. 3. A hot water storage tank having a hot water supply path connected to an upper portion thereof, and hot water taken out from the bottom of the hot water storage tank is heated by a heating means, and then the hot water is supplied to the upper portion of the hot water storage tank. The hot water storage operation state to be circulated and the hot water heated by the heating means are supplied to the external heat radiating section, and the entire amount of the hot water passing through the external heat radiating section is returned directly to the heating means bypassing the hot water storage tank. A hot water supply heat source device of a hot water supply type provided with hot water circulation means that can be switched to a heat radiation operation state for circulating hot water in a form, and control means for controlling operation of the hot water circulation means, Is configured by connecting a plurality of heat-dissipating heat exchangers in parallel, and the control unit adjusts the inflow state of hot water flowing into the heat-dissipating heat exchanger separately for each heat-dissipating heat exchanger. , The operation for heat dissipation Configured hot water storage type hot-water supply heat source apparatus so as to control the operation of the hot water circulating means in state. 4. When the control means has a heat demand for one of the heat radiating heat exchangers, the temperature of the hot water supplied to the external heat radiating section is a temperature corresponding to the heat demand. When a plurality of the heat radiating heat exchangers have a heat request at the same time, the temperature of the hot water supplied to the external heat radiating unit is the highest temperature among the temperatures corresponding to the plurality of heat requests. 4. The hot water supply hot water supply device according to claim 3, wherein the hot water supply heat source device is configured to control the operation of the hot water circulation means in the heat radiation operation state by performing the above adjustment. 5. The system according to claim 3, wherein an inflow temperature of the hot water flowing into the heat radiation heat exchanger in the hot water inflow state is adjusted to a target temperature according to a heat demand. Hot water supply heat source device of storage type. 6. The hot water storage according to claim 5, wherein the flow rate of the hot water flowing into the heat radiating heat exchanger is adjusted individually for each heat radiating heat exchanger to adjust to the target temperature. Type hot water supply heat source device. 7. An on-off valve is connected to each of supply paths for separately supplying hot and cold water to the plurality of heat-dissipating heat exchangers, and a ratio between an opening time and a closing time of the on-off valve is adjusted, so that the heat is released. The hot water supply heat source device of a hot water supply type according to claim 6, wherein the flow rate of the hot water flowing into the heat exchanger is adjusted.