JP3851847B2 - Hot water storage hot water source - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to heat source means for performing a heat supply operation, and hot water storage means for heating hot water in a hot water storage tank with unnecessary heat of the heat source means.As a hot water circulation meansAnd the heat source means and the hot water storage meansAs a hot water circulation meansAn operation control means for controlling the operation of the hot water storage type hot water supply heat source device configured to operate the heat source means when the operation control means has a heat request to the heat source means. .
[0002]
[Prior art]
In the hot water storage type hot water supply heat source device as described above, the heat source means is constituted by a heat pump device that executes an air conditioning operation for air-conditioning the air-conditioning target space as the heat supply operation, and is taken out from the bottom of the hot water storage tank as the hot water storage means. Circulation means for returning hot water to the upper part of the hot water storage tank in a state of passing through the heat pump type heating unit is provided, and the operation control means operates the circulation means during the heating operation of the heat pump device, thereby reducing unnecessary heat of the heat pump device. The hot water in the hot water storage tank is heated to store the hot water (for example, JP-A-2001-296057).
[0003]
And in this kind of hot water storage type hot water supply heat source device, if the operation control means has unnecessary heat of the heat pump device when the air conditioning target space satisfies the target air conditioning state during the heating operation of the heat pump device, the circulation means And the hot water in the hot water storage tank is heated with unnecessary heat of the heat pump device to store the hot water, thereby improving the efficiency.
[0004]
[Problems to be solved by the invention]
However, in the conventional hot water storage type hot water supply heat source device, the operation control means operates the circulation means if there is unnecessary heat in the heat source means during the heat supply operation of the heat source means. Even when effective hot water storage cannot be performed due to unnecessary heat, the hot water storage means is operated, and there is a risk of increasing energy consumption.
[0005]
In other words, when the hot water in the hot water storage tank is heated by unnecessary heat from the heat source means and the hot water is stored, if the operation time of the heat source means is short, it is heated to the temperature that should be stored in the hot water tank by the unnecessary heat from the heat source means. Even if it is not possible, or even if it can be heated to the temperature that should be stored in the hot water storage tank with unnecessary heat from the heat source means, there are cases where the hot water storage is very small and effective hot water storage cannot be performed. When the hot water storage means is operated, energy consumption is increased.
[0006]
The present invention has been made paying attention to such points, and its purpose is to store hot water in a hot water storage tank with unnecessary heat from the heat source means while saving energy, and to improve efficiency. It is in providing a hot water supply heat source device of the type.
[0007]
[Means for Solving the Problems]
  In order to achieve this object, according to the first aspect of the present invention, the heat source means for executing the heat supply operation and the hot water storage means for heating the hot water in the hot water storage tank with the unnecessary heat of the heat source means.As a hot water circulation meansAnd the heat source means and the hot water storage meansAs a hot water circulation meansAn operation control means for controlling the operation of the hot water storage-type hot water supply heat source device configured to operate the heat source means when the heat control means has a heat request to the heat source means. ,
  The operation control unit determines whether or not the operation state of the heat source unit is a state in which the operation state of the heat source unit can be predicted to be continuously operated for a set time for hot water storage, and the operation state of the heat source unit is set for the hot water storage When the situation is such that it can be predicted that the vehicle will run continuously for more than an hour, the hot water storage meansAs a hot water circulation meansAnd when the operating state of the heat source means is not a situation where it can be predicted that the operating condition will be continuously operated for the set time for hot water storage or longer, the hot water storage meansAs a hot water circulation meansIt is configured to prohibit driving.
[0008]
  That is, the operation control means determines whether or not the operation state of the heat source means is a situation where it can be predicted that the operation is continuously performed for the set time for hot water storage or more, and based on the determination result, the hot water storage meansAs a hot water circulation meansOr hot water storage meansAs a hot water circulation meansTherefore, the operation control means determines whether the hot water can be effectively stored, and based on the determination result, the hot water storage meansAs a hot water circulation meansOr hot water storage meansAs a hot water circulation meansIt becomes possible to prohibit driving.
  Therefore, when effective hot water storage can be performed with unnecessary heat from the heat source means,As a hot water circulation meansWhen the hot water in the hot water storage tank is heated by the unnecessary heat of the heat source means to store the hot water, it is possible to improve the efficiency, and in addition, effective hot water cannot be stored by the unnecessary heat of the heat source means. , Hot water storage meansAs a hot water circulation meansIt is possible to reduce the energy consumption by prohibiting the operation of the vehicle and to save energy.
[0009]
In summary, according to the first aspect of the present invention, the hot water storage type can store energy in the hot water storage tank with unnecessary heat of the heat source means and can improve efficiency while saving energy. A hot water supply heat source device can be provided.
[0010]
According to a second aspect of the present invention, when the heat source means is operating after the heat supply means has been operating for more than a set time for determining whether or not the heat supply operation has been performed, the operation status of the heat source means indicates the hot water storage. It is comprised so that it may discriminate | determine that it is the situation which can anticipate driving | running | working continuously more than setting time.
[0011]
  That is, the operation control means continuously operates the operation status of the heat source means for the set time for hot water storage depending on whether or not the heat source means has been operating for more than the set time for determining whether or not the heat supply operation has passed at the present time. Therefore, it is possible to determine whether or not the operation control means can perform effective hot water storage based on the current operation status of the heat source means. It becomes.
  Therefore, the operation control means accurately determines whether or not effective hot water storage can be performed, and based on the determination result, the hot water storage meansAs a hot water circulation meansOr hot water storage meansAs a hot water circulation meansTherefore, it is possible to prohibit energy saving and improve efficiency.
[0012]
According to a third aspect of the present invention, the operation control means includes the heat source means in a hot water storage time zone that is set such that the heat source means can be predicted to operate continuously for the set time for hot water storage or longer. Is determined to be a situation in which it can be predicted that the operation state is continuously operated for the set time for hot water storage or longer.
[0013]
That is, the operation control means is, for example, a hot water storage time zone that is set artificially by a switch or a hot water storage time zone that is automatically set based on a time zone in which the heat source means has actually been operated in the past. It is possible to determine that the operation state of the heat source means is a situation where it can be predicted that the operation will continue for more than the set time for hot water storage. It is possible to determine whether or not effective hot water storage can be performed based on the operation status of the heat source means.
Therefore, the operation control means, for example, within a day, a time zone intended by the user, or a time zone during which the heat source means has been continuously operated in the past for a set time for hot water storage as a hot water storage time zone. Since the hot water can be stored with the unnecessary heat of the heat source means during the hot water storage time zone, it is possible to improve usability, save energy, and improve efficiency.
[0014]
According to invention of Claim 4, the said heat-source means is comprised by the heat pump apparatus, and the heat pump apparatus is comprised so that the air-conditioning operation | movement which air-conditions an air-conditioning object space may be performed as the said heat supply operation. Yes.
[0015]
That is, while the heat pump device performs air conditioning operation, it becomes possible to heat and store hot water in the hot water storage tank with unnecessary heat when the heat pump device performs air conditioning operation, so by the heat from the efficient heat pump device, It becomes possible to air-condition the air-conditioning target space and store hot water in the hot water storage tank, thereby further improving the efficiency.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
An example in which the hot water storage type hot water supply heat source apparatus according to the present invention is applied to an engine heat pump type air conditioning hot water supply system will be described with reference to the drawings.
As shown in FIGS. 1 and 2, this engine heat pump type air conditioning and hot water supply system stores hot water while forming temperature stratification in the hot water storage tank 1, supplies hot water stored in the hot water storage tank 1, and supplies hot water. A hot water storage unit A that heats hot water in 1 and dissipates heat in the external heat radiating unit 2, and an engine as a heat source means capable of performing an air conditioning operation in an air conditioning target space and a heating operation for heating hot water in the hot water storage tank 1 It is comprised from the heat pump type air conditioner B.
[0017]
The hot water storage unit A heats hot water flowing through the hot water storage unit control unit C that controls the operation of the hot water storage unit A, the hot water storage tank 1, the circulation path 3 for circulating hot water in the hot water storage tank 1, and the circulation path 3. The heating unit 4 and the external heat dissipating unit 2 that exchange heat with the hot water flowing through the circulation path 3 to dissipate heat and the like, and the circulating pump P1 is operated to circulate the hot water in the hot water storage tank 1 through the circulation path 3. However, the heating unit 4 heats or the external heat radiating unit 2 radiates heat.
[0018]
The hot water storage tank 1 has an uppermost thermistor S1 that detects whether the amount of stored hot water is equal to or higher than the minimum amount, and detects whether the amount of stored hot water is lower or higher. The upper thermistor S2 that is detected by detecting the hot water amount, whether the hot water storage amount is medium or higher, the middle thermistor S3 that is detected by detecting the hot water temperature, whether the hot water storage amount is full or higher, There is provided a bottom thermistor S4 that detects by detecting.
The installation positions of the plurality of thermistors are in the order of the uppermost thermistor S1, the upper thermistor S2, the middle thermistor S3, and the lower thermistor S4 from the top of the hot water storage tank 1.
And, according to the needs of the user, the hot water storage remote controller R2 can be used to select one of the three hot water storage amounts of "low", "medium", and "full" as the target hot water storage amount in the hot water storage tank 1. .
[0019]
The hot water storage tank 1 is connected to a hot water supply path 5 for supplying water to the hot water storage tank 1 from the bottom using tap water pressure, and is connected to a hot water supply path 6 for supplying hot water to a bathroom or kitchen from the upper part. It is configured to supply only the amount of water used in the kitchen or the like from the water supply channel 5 to the hot water storage tank 1.
The hot water supply path 6 is connected to a mixing water supply path 7 branched from the water supply path 5, and the mixing ratio of the hot water from the hot water supply path 6 and the water from the mixing water supply path 7 can be adjusted to the connection location. A mixing valve 8 is provided.
A water supply thermistor 9 for detecting the water supply temperature is provided upstream of the branching point of the mixing water supply channel 7 in the water supply channel 5, and a check valve 10 is provided in each of the water supply channel 5 and the mixing water supply channel 7. Is provided.
Incidentally, an overflow passage 11 is connected to the hot water supply passage 6, and an air vent valve 12 is provided in the overflow passage 11.
[0020]
Further, on the upstream side of the mixing valve 8 in the hot water supply passage 6, a hot water storage outlet thermistor 13 for detecting the temperature of the hot water supplied to the hot water supply passage 6 from the upper part of the hot water storage tank 1 is provided, and the mixing valve 8 in the hot water supply passage 6 is provided. On the further downstream side, a hot water proportional valve 15 for adjusting the flow rate of hot water in the hot water supply passage 6 and a mixing thermistor 14 for detecting the temperature of hot water mixed by the mixing valve 8 are provided.
[0021]
A hot water supply path 6 on the downstream side of the mixing thermistor 14 is provided with a general hot water supply path 16 for supplying hot water to an unillustrated hot water tap such as a kitchen and a washroom, and a hot water supply path 17 for supplying hot water to a bathtub outside the illustration. The hot water filling path 17 is connected to a bath return path 18 from the bathtub, and hot water is supplied to the bathtub through both the bath return path 18 and the bath return path 19.
The general hot water supply path 16 is provided with a hot water flow rate sensor 20 that detects the flow rate of hot water flowing through the general hot water supply path 16, and the hot water supply path 17 detects the flow rate of hot water flowing through the hot water supply path 17. A hot water flow rate sensor 21, a hot water solenoid valve 22, a vacuum breaker 23, and a hot water check valve 24 are provided in this order from the upstream side.
[0022]
The hot water supply operating means G includes a hot water storage outlet thermistor 13, a water supply thermistor 9, a mixing valve 8, a mixing thermistor 14, a hot water proportional valve 15, a hot water flow rate sensor 20, a hot water solenoid valve 22, and the like.
When hot water is supplied to the general hot water supply passage 16, the opening of the mixing valve 8 is set so that the temperature of the hot water to be supplied becomes the hot water supply set temperature based on the hot water supply set temperature and the detection information of the hot water storage outlet thermistor 13 and the hot water supply thermistor 9. While adjusting, 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 set temperature, so that hot water at the hot water supply set temperature is supplied. It is configured.
Further, when filling the bathtub, similarly to when supplying hot water to the general hot water supply passage 16, the opening of the mixing valve 8 is adjusted to open the hot water solenoid valve 22 so as to supply hot water of the hot water set temperature. When the hot water adjusted to the hot water setting temperature by the mixing bubble 8 is supplied to the bathtub from both the bath return path 18 and the bath going path 19, and the hot water of the hot water set amount is supplied into the bathtub. The hot water solenoid valve 22 is closed to fill the hot water in the bathtub.
[0023]
The circulation path 3 and the hot water storage tank 1 allow the hot water flowing through the circulation path 3 to be returned to the hot water storage tank 1, or the hot water in the hot water storage tank 1 is taken into the circulation path 3 so that the upper part 1 of the hot water storage tank 1. It is connected in communication at a total of three locations, two locations and two bottom portions.
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 through the upstream side of the hot water supply path 6. A return path 26 for returning hot water flowing through the circulation path 3 to the bottom of the hot water storage tank 1 via the downstream side of the water supply path 5, and an extraction path 27 for taking out hot water at the bottom of the hot water storage tank 1 to the circulation path 3. Are connected.
[0024]
The upper connection path 25 is provided with an upper on-off valve 28, the return path 26 is provided with a return on-off valve 29, and the take-out path 27 detects the temperature of hot water taken out from the bottom of the hot water storage tank 1. An extraction thermistor 30 is provided.
[0025]
The heating unit 4 supplies the coolant from the engine heat pump air conditioner B to heat the hot water, and supplies the cooling water recovered from the exhaust heat of the engine heat pump air conditioner B to supply the hot water. It comprises an engine exhaust heat utilization type heating unit 34 for heating and an auxiliary heating unit 35 for heating hot water by combustion of a burner.
Then, the heat pump heating unit 33, the engine exhaust heat utilization heating unit 34, and the auxiliary heating unit 35 are provided in this order from the upstream side in the hot water circulation direction of the circulation path 3.
[0026]
Although not shown, the auxiliary heating unit 35 is provided with a gas combustion type burner and a fan for supplying combustion air to the burner, and heats hot water flowing through the circulation path 3 by combustion of the burner. The rotation speed and the amount of fuel gas supplied to the burner are adjusted, and the temperature of the hot water after heating is adjusted by the auxiliary heating unit 35.
[0027]
The external heat radiating section 2 includes a heat radiating section 42 for exchanging heat between hot water flowing through the circulation path 3 and hot water as a heating medium, and hot water flowing through the circulation path 3 and hot water in the bathtub. And a heat radiating portion 43 for bathing for exchanging heat.
Then, the circulation path 3 is branched into a heating circulation path 3a having a heating heat radiation part 42 and a bath circulation path 3b having a bath heat radiation part 43, and the heating heat radiation part 42 and the bath heat radiation part 43 is connected in parallel.
[0028]
Further, the heating circulation path 3 a is provided with a heating on-off valve 44 downstream of the heating radiating section 42 in the hot water circulation direction, and the bath circulation path 3 b is more hot water than the bath radiating section 43. A bath opening / closing valve 45 is provided on the downstream side in the circulation direction.
The downstream side of the hot water circulation direction with respect to the heating on-off valve 44 of the heating circulation path 3a and the downstream side of the bath on-off valve 45 of the bath circulation path 3b are merged into a single flow path, and then merged. A heat dissipation return thermistor 60 is provided in the flow path.
[0029]
In the heating radiator 42, the heating pump P2 is operated so that the heat medium circulating through the heating return path 46 and the heating forward path 47 and the hot water flowing through the circulation path 3 are convected to exchange heat. It is configured.
The heating return path 46 is provided with a heating return thermistor 48 that detects the temperature of the heating medium in the heating return path 46, a makeup water tank 49, and a heating pump P2 in order from the upstream side in the circulation direction of the heating medium. The forward path 47 is provided with a heating forward thermistor 50 that detects the temperature of the heat medium in the heating forward path 47.
The heating operation means J includes a heating return thermistor 48, a heating forward thermistor 50, and a heating pump P2.
[0030]
The makeup water tank 49 is provided with an upper limit sensor 51 for detecting the upper limit of the water level and a lower limit sensor 52 for detecting the lower limit. A tank water supply path 53 branched from the water supply path 5 is connected to the tank water supply path 53. Is provided with a makeup water electromagnetic valve 54. A heating bypass path 55 that connects the heating return path 46 and the heating forward path 47 is also provided.
[0031]
In the bath radiating unit 43, the bath pump P3 is operated to convect the hot water in the bathtub circulating through the bath return path 18 and the bath going-out path 19 and the hot water flowing through the circulation path 3 to exchange heat. It is configured as follows.
In the bath return path 18, a water level sensor 56 for detecting the water level of hot water in the bathtub, and a bath return thermistor 57 for detecting the temperature of hot water in the bath return path 18, in order from the upstream side in the hot water circulation direction in the bathtub, A two-way valve 58, a bath pump P3, and a bath water flow switch 59 are provided.
The bath operating means H includes a water level sensor 56, a bath return thermistor 57, a two-way valve 58, a bath water flow switch 59, a bath pump P3, and the like.
[0032]
In the circulation path 3, a circulation pump P 1, a heat pump heating section inlet thermistor 61, a heat pump heating section opening / closing valve 62, a heat pump heating section 33, an engine exhaust, are connected in the hot water circulation direction from the connection point with the extraction path 27. A heat utilization type heating unit 34, a waste heat utilization type heating unit outlet thermistor 63, a circulation flow rate sensor 64, a circulation flow rate adjustment valve 65, an auxiliary heating unit 35, and a hot water storage thermistor 66 are provided.
The circulation path 3 is connected to a heat pump heating section bypass path 67 that bypasses the heat pump heating section 33, and a bypass opening / closing valve 68 is provided in the heat pump heating section bypass path 67. .
[0033]
The circulation adjusting means F includes a waste heat utilization type heating unit outlet thermistor 63, a circulation flow rate sensor 64, a circulation flow rate adjustment valve 65, a hot water storage thermistor 66, and the like. The temperature of the hot water heated at 4 is adjustable.
[0034]
The hot water circulation means E as hot water storage means includes a plurality of on / off valves such as the circulation path 3, the circulation pump P 1, and the heat pump heating part on / off valve 62, bypass on / off valve 68, upper on / off valve 28, and return on / off valve 29. A non-bypass circulation state in which hot water taken out from the bottom of the hot water storage tank 1 to the circulation path 3 is circulated in a state of passing through the heat pump heating unit 33, and hot water taken out from the bottom of the hot water storage tank 1 to the circulation path 3 Can be switched to a bypass circulation state in which the heat pump type heating unit 33 is circulated without passing through it.
[0035]
In addition to the non-bypass circulation state and the bypass circulation state described above, the hot water circulation means E includes an initial circulation state in which hot water heated by the heating unit 4 is circulated back to the bottom of the hot water storage tank 1, and auxiliary heating. A heating circulation state in which hot water heated by the unit 35 is circulated in a state where the hot water is passed through the heating radiator 42 and not through the heat pump heating unit 33, and the hot water heated in the auxiliary heating unit 35 is radiated by the bath 43, a recirculation state in which heat is circulated without passing through the heat pump type heating unit 33, and hot water heated by the auxiliary heating unit 35 is allowed to pass through the heating heat radiating unit 42 and the bath heat radiating unit 43, and the heat pump. It is configured to be switchable to a heat radiating circulation state in which it is circulated without passing through the heating unit 33.
[0036]
And although switching to each circulation state of the hot water circulation means E will not be described in detail, the upper on-off valve 28, the heat pump heating part on-off valve 62, the bypass on-off valve 68, A plurality of on-off valves, the return on-off valve 29, the heating on-off valve 44, and the bath on-off valve 45, are opened and closed to switch to each circulation state.
For example, the upper on-off valve 28 and the heat pump heating section on-off valve 62 are opened, and the bypass on-off valve 68, the return on-off valve 29, the heating on-off valve 44, and the bath on-off valve 45 are closed. Therefore, it is switched to the non-bypass circulation state.
[0037]
The engine heat pump air conditioner B includes a plurality of indoor units 71, an outdoor unit 72, an indoor unit 71, and a heat pump operation control unit D that controls the operation of the outdoor unit 72. The room) can be air-conditioned.
The indoor unit 71, the outdoor unit 72, and the heat pump heating unit 33 in the hot water storage unit A are connected by a refrigerant pipe 73 so that the refrigerant in the engine heat pump cooling and heating apparatus B can be supplied to the heat pump heating unit 33. ing.
[0038]
Each of the plurality of indoor units 71 is provided with an electronic expansion valve 74, an indoor heat exchanger 75, and an indoor air conditioner blower 76 for sending air temperature-controlled by the indoor heat exchanger 75 to the air-conditioning target space. The opening degree of the electronic expansion valve 74 is adjusted based on the detection information of the refrigerant thermistor 89 that detects the temperature of the refrigerant condensed in the heat exchanger 75.
The outdoor unit 72 includes a gas engine 77, a compressor 78, an accumulator 79, a four-way valve 80, an outdoor heat exchanger 81, and an outdoor air conditioner blower 82 that ventilates the outdoor air to the outdoor heat exchanger. A radiator 83 for radiating the exhaust heat of 77 to the outside and a radiator fan 84 are also provided.
The heat pump operation means K includes an electronic expansion valve 74, an HP heating electronic expansion valve 74a, an indoor air conditioner blower 76, a gas engine 77, a rotational speed sensor 77a, a compressor 78, a four-way valve 80, an outdoor air conditioner blower 82, and a low pressure detection. It is constituted by means 87, high-pressure detection means 88, and the like.
[0039]
Further, a cooling water passage 85 for circulating cooling water for cooling the gas engine 77 between the radiator 83 is provided, and a radiator pump P4 is provided in the cooling water passage 85 so that the cooling water recovered from the exhaust heat of the gas engine is supplied. An exhaust heat switching mechanism 86 is provided that can be switched between a heating state supplied to the engine exhaust heat utilization heating unit 34 through the heating supply path 90 and an exhaust heat state supplied to the radiator 83 and exhausted.
The cooling water circulation means L includes a radiator pump P4, an exhaust heat switching mechanism 86, a radiator blower 84, and the like.
[0040]
The operation of the engine heat pump type air conditioner B is controlled by the heat pump operation control unit D based on the command of the air conditioning remote controller R1, and the compressor 78 is operated by the gas engine 77 and the four-way valve 80 is switched. A cooling operation and a heating operation are configured to be selectable, and air conditioning is performed in a room that requires air conditioning by opening / closing control of the electronic expansion valve 74 of the indoor unit 71.
Further, when the hot water in the circulation path 3 is heated by the heat pump heating unit 33, the heating operation is performed, and the HP heating electronic expansion valve 74a is controlled to supply the refrigerant to the heat pump heating unit 33. ing.
[0041]
In the cooling operation, as shown by a solid line in FIG. 2, the refrigerant is flowed, the indoor heat exchanger 75 is caused to function as an evaporator, the temperature of the air supplied to the air-conditioning target space is adjusted, and the outdoor heat exchange is performed. The vessel 81 functions as a condenser to dissipate heat to the outside air.
In this cooling operation, a rotation speed sensor that detects the rotation speed of the gas engine 77 based on the detection information of the low pressure detection means 87 that detects the pressure of the refrigerant on the low pressure side so that the detected pressure becomes the target pressure for cooling. The rotational speed of the gas engine 77 is controlled based on the detection information 77a.
[0042]
In the heating operation, as shown by the dotted line in FIG. 2, the refrigerant is caused to flow, the indoor heat exchanger 75 is caused to function as a condenser, the temperature of the air supplied to the air-conditioning target space is adjusted by heating, and the outdoor heat exchange is performed. The device 81 functions as an evaporator so as to absorb heat from the outside air.
In this heating operation, based on the detection information of the high pressure detection means 88 that detects the pressure of the refrigerant on the high pressure side, the gas engine is based on the detection information of the rotational speed sensor 77a so that the detected pressure becomes the target pressure for heating. The rotational speed of 77 is controlled.
In this heating operation, the hot water flowing through the circulation path 3 is heated by opening the HP heating electronic expansion valve 74 a and supplying the high-pressure refrigerant to the heat pump heating unit 33 through the refrigerant pipe 73. I have to.
[0043]
In cooling operation and heating operation, hot water flowing through the circulation path 3 is heated by supplying cooling water to the engine exhaust heat utilization type heating unit 34 by switching the exhaust heat switching mechanism 86 to a heating state. I have to.
[0044]
As shown in FIG. 3, the hot water storage unit control unit C and the heat pump operation control unit D control that the engine heat pump air conditioner B is in an air conditioning operation, a drive request to the engine heat pump air conditioner B, and the like. An operation control means U is configured by the hot water storage unit control unit C and the heat pump operation control unit D.
The heat pump operation control unit D is a heat pump operation unit K and a cooling water circulation unit L based on a command from the air conditioner remote controller R1 installed in each room as an air conditioning target space and a control signal from the hot water storage unit control unit D. Are controlled so as to perform an air conditioning operation such as a cooling operation or a heating operation for the air conditioning target space.
The hot water storage unit control part C is based on a command from the hot water remote controller R2 and a control signal from the heat pump operation control part D, hot water circulation means E, circulation adjustment means F, hot water supply operation means G, bath operation means H, heating operation means. J, control of each operation of the auxiliary heating unit 35 to store hot water in the hot water storage tank 1, hot water storage operation to dissipate heat in the external heat radiating unit 2, hot water storage in the hot water storage tank 1 is less than the minimum secured amount Each operation such as a hot water supply priority operation for supplying hot water at the time is performed.
[0045]
Hereinafter, description will be added for each operation.
Explaining the cooling operation, when there is a cooling request from the air-conditioning remote controller R1, the heat pump operation control unit D opens the electronic expansion valve 74 corresponding to the room where the cooling request is made and opens the indoor heat exchanger 75 to the evaporator. The heat pump operating means K is controlled so that the air supplied to the air-conditioning space is cooled and temperature-controlled, and the outdoor heat exchanger 81 functions as a condenser to dissipate heat to the outside air. .
Then, the heat pump operation control unit D operates the radiator pump P4, operates the radiator fan 84 to dissipate heat in the radiator 83, and when the cooling water flowing through the cooling water channel 85 becomes equal to or higher than the heating set temperature, The operation of the cooling water circulation means L is controlled so that the heat switching mechanism 86 is switched to the heating state and the cooling water is supplied to the engine exhaust heat utilization type heating unit 34.
In addition, the heat pump operation control unit D is configured to transmit a control signal not to permit HP heating to the hot water storage unit control unit C during the cooling operation.
[0046]
Explaining the heating operation, when there is a heating request from the air-conditioning remote controller R1, the heat pump operation control unit D opens the electronic expansion valve 74 corresponding to the room with the heating request and condenses the indoor heat exchanger 75. The heat pump operating means K is controlled so that the air supplied to the air-conditioning target space is heated to adjust the temperature and the outdoor heat exchanger 81 functions as an evaporator to absorb heat from the outside air.
Then, the heat pump operation control unit D operates the radiator pump P4, operates the radiator fan 84 to dissipate heat in the radiator 83, and when the cooling water flowing through the cooling water channel 85 becomes equal to or higher than the heating set temperature, The operation of the cooling water circulation means L is controlled so that the heat switching mechanism 86 is switched to the heating state and the cooling water is supplied to the engine exhaust heat utilization type heating unit 34.
[0047]
Further, the heat pump operation control unit D, for example, when the heating target is a plurality of rooms and the heating load is higher than the set heating load and during the startup heating operation, the hot water storage unit control unit C For example, when the heating load is less than the set heating load, for example, when the heating target is one room, the HP heating non-permission control signal is transmitted to the hot water storage unit controller C. A control signal for permitting heating is transmitted.
[0048]
By the way, when the heat pump operation control unit D receives a control signal for requesting the heating operation from the hot water storage unit control unit C when there is no heating request, the heat pump operation control unit D opens the HP heating electronic expansion valve 74a and opens the refrigerant pipe 73. The heating operation is performed in a state in which the high-pressure refrigerant is supplied to the heat pump type heating unit 33 through.
[0049]
In the air conditioning operation of the cooling operation and the heating operation described above, the heat pump operation control unit D determines whether or not the operation state of the engine heat pump type air conditioner B can be continuously operated for a set time for hot water storage or more. When it is determined that the operation state of the engine heat pump type air conditioner B can be predicted to be continuously operated for a set time for hot water storage, the hot water storage unit controller C is requested to perform hot water storage operation for unnecessary heat. When the hot water circulation means E is operated to perform a hot water storage operation for unnecessary heat, and when the operation state of the engine heat pump air conditioner B is not a state where it can be predicted that the operation will continue for more than the set time for hot water storage, The hot water circulation means E is configured to prohibit the execution of hot water storage operation for unnecessary heat.
[0050]
In other words, the heat pump operation control unit D executes a determination process for determining whether or not the operation state of the engine heat pump air-conditioning apparatus B is a state where the operation state can be continuously operated for a set time for hot water storage or more. In the determination process, the air conditioning operation for unnecessary heat is performed only when it is determined that the operating state of the engine heat pump air conditioner B can be predicted to be continuously operated for a set time for hot water storage or more. A control signal for requesting a hot water storage operation for unnecessary heat is transmitted to the unit controller C.
[0051]
When the description is added to the determination process, the heat pump operation control unit D determines that the engine heat pump type air conditioner B has been operated after the set time for determining whether or not the air conditioning operation has been performed (for example, 10 minutes) or longer. While it is determined that the operation status of the air conditioner B is a situation in which it can be continuously operated for a set time for hot water storage, it can be predicted that the engine heat pump type air conditioner B is continuously operated for a set time for hot water storage. In the hot water storage time zone set as, the operation state of the engine heat pump type air conditioner B is determined to be a state in which it can be continuously operated for the hot water storage set time or longer.
[0052]
To explain the setting of the hot water storage time zone, the heat pump operation control means D sets the time zone artificially set by the air conditioner remote controller R1 or the like as the hot water storage time zone and executes the air conditioning operation. A time zone with a high frequency is automatically set as a hot water storage time zone by a learning function.
When the learning function is described, for example, one day is set as a reference period, and the day is divided into a plurality of reference time zones for each set time width (for example, one hour). Stores whether or not the air conditioning operation of the heating operation and the cooling operation is actually executed for the time zone, and sets the reference time zone in which the air conditioning operation is continuously executed for a plurality of days (for example, 3 days) as the hot water storage time zone Is configured to set as
[0053]
The air conditioning operation for unnecessary heat in the engine heat pump air conditioner B will be described. The heat pump operation control unit D uses the exhaust heat of the gas engine 77 as the hot water storage unit A when there is a cooling request as the air conditioning operation for unnecessary heat. While performing the cooling operation for unnecessary heat to cool the air-conditioning target space while supplying to the hot water storage unit A while supplying the exhaust heat of the gas engine 77 and the refrigerant of the engine heat pump type air conditioner B when there is a heating request, The heating operation for unnecessary heat for heating the air-conditioning target space is performed.
[0054]
In the cooling operation for heat required, the heat pump operation control unit D performs the above-described cooling operation and transmits a control signal requesting the hot water storage operation for unnecessary heat to the hot water storage unit control unit C. Have
In the heating operation for unnecessary heat, the heat pump operation control unit D performs the heating operation described above, and transmits a control signal for requesting the hot water storage operation for unnecessary heat to the hot water storage unit control unit C, and the heating load When the heating operation is less than the set heating load, the HP heating electronic expansion valve 74 a is opened, and the high-pressure refrigerant is supplied to the heat pump heating unit 33 through the refrigerant pipe 73.
[0055]
The hot water storage operation will be described. When the hot water storage unit control unit C receives a control signal requesting a hot water storage operation for unnecessary heat from the heat pump operation control unit D, regardless of whether there is a hot water storage request by the hot water storage remote controller R2 or not. The hot water circulation means E is operated in a non-bypass circulation state, and the circulation adjusting means F is controlled so that the temperature detected by the hot water storage thermistor 66 becomes the hot water storage set temperature (for example, 80 ° C.).
In this way, the hot water storage unit controller C operates the hot water circulating means E when the operating state of the engine heat pump air conditioner B is a state in which it can be continuously operated for a set time for hot water storage or more. Hot water is stored in the hot water storage tank 1 by unnecessary heat of the engine heat pump type air conditioner B.
[0056]
In the hot water storage operation, when there is a hot water storage request by the hot water remote controller R2, the hot water storage unit controller C sets the hot water circulation means E to the non-bypass circulation state or the bypass circulation state based on the operation state of the engine heat pump air conditioner B. The hot water storage tank 1 is configured to switch to store hot water.
[0057]
In other words, the hot water storage unit control unit C switches the hot water circulation means E to the bypass circulation state when receiving a control signal not permitting HP heating from the heat pump operation control unit D, and detects the temperature detected by the hot water storage thermistor 66. The operation of the auxiliary heating unit 35 is controlled so as to adjust the heating amount of the auxiliary heating unit 35 so that the hot water storage temperature is set to a hot water storage set temperature (for example, 80 ° C.).
When the hot water storage unit control unit C receives the HP heating permission control signal from the heat pump operation control unit D, the hot water storage unit E switches the hot water circulation means E to the non-bypass circulation state and operates the temperature detected by the hot water storage thermistor 66. The operation of the circulation adjusting means F is controlled so as to adjust the amount of circulation in the circulation path 3 so that the hot water storage temperature reaches a set temperature (for example, 80 ° C.).
[0058]
Further, in the hot water storage operation, the hot water storage unit control unit C does not receive a control signal from the heat pump operation control unit D that the engine heat pump type air conditioner B is in the air conditioning operation. The control signal for requesting the heating operation is transmitted, the hot water circulation means E is switched to the non-bypass circulation state, and the temperature detected by the hot water storage thermistor 66 is set to the hot water storage set temperature (for example, 80 ° C.). The operation of the circulation adjusting means F is controlled so as to adjust the circulation amount of the circulation path 3.
[0059]
Incidentally, in the hot water storage operation, the hot water storage unit controller C switches the hot water circulation means E to the initial circulation state when the detected temperature of the hot water storage thermistor 66 is lower than the hot water storage set temperature (for example, 80 ° C.). The heated hot water is returned to the bottom of the hot water storage tank 1 to prevent the temperature stratification formed in the hot water storage tank 1 from being disturbed.
As an oil recovery operation for recovering the refrigerant accumulated in the heat exchanger by forcibly supplying the refrigerant to the heat exchanger to which the refrigerant is not supplied, the engine heat pump type air conditioner B is a heat pump. When the refrigerant is supplied to the heating unit 33, the hot water circulating means E is switched to the bypass circulation state.
[0060]
Explaining the heat dissipation operation, the hot water storage unit control unit C executes the follow-up operation when there is a request for only the reheating request, and executes the heating operation for heat dissipation when there is a request only for the heat dissipation heating, When there are both a follow-up request and a heat-dissipating heating request, the heat-dissipating heating and the follow-up simultaneous operation are executed.
[0061]
To explain the reheating operation, the hot water storage unit control unit C switches the hot water circulation means E to the recirculation circulation state, and the auxiliary heating unit 35 sets the temperature detected by the hot water storage thermistor 66 to the reheating set temperature. In addition to controlling the operation of the auxiliary heating unit 35 to adjust the heating amount, the bath operating means H is operated so as to circulate hot water in the bathtub through the bath return path 18 and the bath return path 19 by operating the bath pump P3. I try to control it.
Then, the hot water in the bathtub is heated and chased by hot water flowing in the circulation path 3 in the heat radiating part 43 for bath, and when the temperature detected by the bath return thermistor 57 becomes equal to or higher than the set temperature for chasing, the bath pump P3 While stopping an operation | movement, the driving | operation of the auxiliary | assistant heating part 35, the hot water circulation means E, and the bath operation means H is stopped.
[0062]
To explain the heat-dissipating heating operation, the hot water storage unit controller C switches the hot water circulation means E to the additional circulation state, and the auxiliary heating unit 35 so that the temperature detected by the hot water storage thermistor 66 becomes the set temperature for additional heating. Controls the operation of the auxiliary heating unit 35 to adjust the heating amount and operates the heating pump P2 to transfer the heat medium from the heating terminal (for example, a floor heating device or a bathroom heating device) to the heating return path 46 and the heating forward. The operation of the heating operation means J is controlled so as to circulate through the passage 47. Then, the heating medium from the heating terminal is heated by the hot water flowing in the circulation path 3 in the heating radiator 42, and the heating medium is circulated and supplied to the heating terminal. While stopping the operation of the pump P2, the auxiliary heating unit 35, the hot water circulation means E, and the heating operation means J are stopped.
[0063]
When the heating and reheating simultaneous operation is added, the hot water circulation means E is switched to the heat recirculation state, and the auxiliary heating unit 35 increases the heating amount so that the temperature detected by the hot water storage thermistor 66 becomes the setting temperature for reheating. The operation of the auxiliary heating unit 35 is controlled to be adjusted.
Then, similarly to the chasing operation and the heat radiation operation, the operation of the bath operation means H and the heating operation means J is controlled to chase the hot and cold water in the bathtub, and is heated by the heating radiating section 42 to the heating terminal. The heating medium is circulated and supplied.
[0064]
The hot water supply priority operation is executed when the hot water tap is opened to supply hot water in a state where the hot water storage amount of the hot water storage tank 1 is less than the minimum ensured amount, and the hot water circulation means E is switched to the bypass circulation state, whereby the auxiliary heating unit 35 The hot water heated at is supplied from the upper connection path 25 to the hot water supply path 6.
And when supplying hot water to the general hot water supply path 16 based on the detection information of the hot water supply set temperature, the hot water storage outlet thermistor 13 and the hot water supply thermistor 9, the hot water supply temperature is set to the hot water supply set temperature, and the hot water filling path 17 When supplying hot water, the opening of the mixing valve 8 is adjusted so that the temperature of the hot water to be supplied becomes the hot water set temperature, and the detected temperature and the hot water set temperature or hot water are determined based on the detection information of the mixing thermistor 14. The operation of the hot water supply operating means G is controlled so as to finely adjust the opening of the mixing valve 8 based on the deviation from the tension setting temperature, so that hot water at a desired temperature is supplied.
Incidentally, when the amount of hot water stored in the hot water storage tank 1 is not less than the minimum ensured amount, the hot water stored in the hot water storage tank 1 is supplied to the hot water supply passage 6.
[0065]
The control operation of the heat pump operation control unit D in the cooling operation and the heating operation and the control operation of the hot water storage unit control unit C in the hot water storage operation will be described based on the flowcharts of FIGS.
[0066]
In the cooling operation, as shown in FIG. 4, when a cooling request is received from the air conditioning remote controller R1, a control signal not permitting HP heating is transmitted to the hot water storage unit controller C (step) 1).
And a discrimination | determination process is performed and it is discriminate | determined whether the driving | running state of the engine heat pump type | formula air conditioning apparatus B is an unnecessary heat hot water storage possible state which is a state which can be predicted to drive | operate continuously more than the setting time for hot water storage ( Step 2).
[0067]
If it is determined in the determination processing that the unnecessary heat hot water storage is possible, the unnecessary heat cooling operation is performed, and the exhaust heat of the gas engine 77 is supplied to the hot water storage unit A while the air conditioning target space is cooled. If it is not determined that the unnecessary heat hot water can be stored, a normal cooling operation for cooling only the air-conditioning target space is performed (steps 3 and 4).
When there is no cooling request, a stop process for stopping the operation of the gas engine 77 and the like is executed to stop the cooling operation (steps 5 and 6).
[0068]
In the heating operation, as shown in FIG. 5, when there is a heating request from the air conditioning remote controller R1, for example, a startup heating operation for heating the air-conditioning target space with the maximum capacity is executed, and the hot water storage unit control unit An HP heating non-permission control signal is transmitted to C (steps 11 and 12).
After that, when the start-up heating operation is started and the set time for start-up elapses and the switching condition is satisfied, the start-up heating operation is terminated and the heating operation according to the heating load is performed. Execute (step 13).
In this heating operation, when the heating load is equal to or higher than the set heating load, a control signal not to permit HP heating is transmitted to the hot water storage unit control unit C. When the heating load is less than the set heating load, the hot water storage unit control is performed. An HP heating permission control signal is transmitted to part C (steps 14 to 16).
[0069]
And a discrimination | determination process is performed and it is discriminate | determined whether the driving | running state of the engine heat pump type | formula air conditioning apparatus B is an unnecessary heat hot water storage possible state which is a state which can be predicted to drive | operate continuously more than the setting time for hot water storage ( Step 17).
If it is determined in the determination process that the unnecessary heat hot water can be stored, the waste heat of the gas engine 77 and the refrigerant of the engine heat pump air conditioner B are supplied to the hot water storage unit A while heating the air conditioning target space. If the operation is executed and it is not determined that the unnecessary heat hot water can be stored, the normal heating operation for heating the air-conditioning target space is executed (steps 18 and 19).
And when a heating request | requirement is lose | eliminated, the stop process which stops operation | movement of the gas engine 77 etc. is performed, and the heating operation is stopped (steps 20 and 21).
[0070]
As shown in FIG. 6, the hot water storage operation starts when a hot water storage operation for unnecessary heat is requested from the heat pump operation control unit D or when a hot water storage request is received from the hot water storage remote controller R2.
Then, when a hot water storage operation for unnecessary heat is requested from the heat pump operation control unit D (step 31), if an HP heating non-permission command is instructed, the hot water circulation means E is operated in a bypass circulation state. Thus, the hot water in the hot water storage tank 1 is heated by the engine exhaust heat utilization type heating unit 34 to store hot water (steps 32 and 33).
When a hot water storage operation for unnecessary heat is requested from the heat pump operation control unit D and an HP heating permission command is instructed, the hot water circulation means E is operated in a non-bypass circulation state to store hot water. The hot water in the tank 1 is heated by the heat pump type heating unit 33 and the engine exhaust heat utilization type heating unit 34 to store hot water (step 34).
[0071]
Then, when there is a hot water storage request from the hot water storage remote controller R2 (step 31), if an HP heating disapproval command is instructed, the hot water circulating means E is operated in the bypass circulation state, and the hot water in the hot water storage tank 1 is operated. Is heated by the auxiliary heating unit 35 to store hot water (steps 35 and 36).
When there is a hot water storage request from the hot water remote controller R2, if an HP heating permission command is issued, the hot water circulation means E is operated in a non-bypass circulation state to heat the hot water in the hot water storage tank 1 with a heat pump. The unit 33 is heated to store hot water (step 37).
[0072]
In this way, when a hot water storage operation for unnecessary heat is requested from the heat pump operation control unit D or a hot water storage request is received from the hot water storage remote controller R2, the hot water taken out from the bottom of the hot water storage tank 1 is heated by the heating unit 4. It is heated and returned to the upper part of the hot water storage tank 1 to store hot water.
Then, when no hot water storage operation for unnecessary heat is requested from the heat pump operation control unit D and no hot water storage request is received from the hot water remote controller R2, stop processing for stopping the operation of the hot water circulation means E and the circulation adjustment means F is executed. Thus, the hot water storage operation is stopped (steps 38 and 39).
[0073]
[Another embodiment]
(1) In the above embodiment, when the heat pump operation control unit D is operating after the engine heat pump air conditioner B has performed the air conditioning operation for more than the set time for determining whether air conditioning is possible (for example, 10 minutes) in the determination process, It is determined that the operating state of the engine heat pump air conditioner B is a situation in which the engine heat pump air conditioner B can be continuously operated for a set time for hot water storage and the engine heat pump air conditioner B is continuously operated for a set time for hot water storage. Is configured so as to determine that the operating state of the engine heat pump air conditioner B can be continuously operated for more than the set time for hot water storage even during the hot water storage time zone set as predictable. However, the control operation of the discrimination process can be changed as appropriate.
[0074]
For example, the engine heat pump air conditioner is only operated when the heat pump operation control unit D is operating after the engine heat pump air conditioner B has been operating for more than a set time for determining air conditioning (for example, 10 minutes) in the determination process. It is configured to determine that the operation state of B is a state where the operation can be continuously performed for a set time for hot water storage or the engine heat pump type air conditioner B can be continuously operated for a set time for storing hot water. Only in the hot water storage time zone that is set as predictable, it is possible to determine that the operation status of the engine heat pump type air conditioner B can be continuously operated for more than the hot water storage set time. is there.
[0075]
In addition, the determination process is not limited to the one executed by the heat pump operation control unit D. For example, the load signal from 1 to 7 according to the air conditioning load can be transmitted and received freely from the heat pump operation control unit D to the hot water storage unit control unit C. The hot water storage unit control unit C is configured to determine whether or not the operation state of the engine heat pump type air conditioner B is a state in which the hot water storage unit B can be continuously operated for a set time for hot water storage or more based on the load signal. It is also possible to do.
[0076]
Incidentally, the learning function for setting the hot water storage time zone is not limited to the one shown in the above embodiment, for example, storing the actual start time and end time of the air conditioning operation for one day, and a plurality of days (for example, 3 days) It is also possible to obtain a time zone in which the air-conditioning operation has been performed continuously, set the time zone as a hot water storage time zone, and apply various other learning functions.
[0077]
(2) In the above embodiment, the cooling water of the gas engine 77 is supplied to the engine exhaust heat utilization type heating unit 34 and the hot water circulation means E is operated to store hot water in the hot water storage tank 1 by the exhaust heat of the gas engine 77. As a condition for performing the operation, the operating state of the engine heat pump type air conditioner B is a state in which it can be continuously operated for a set time for hot water storage and the cooling water flowing through the cooling water channel 85 is set for heating. However, the cooling water flowing through the cooling water passage 85 is only equal to or higher than the set temperature for heating, and the cooling water of the gas engine 77 is supplied to the engine exhaust heat utilizing heating unit 34 to circulate hot water. The means E may be operated.
[0078]
(3) In the above embodiment, the hot water storage unit A is provided with the external heat radiating unit 2 to execute the heat radiating operation in addition to the hot water storage operation and the hot water supply priority operation. It is also possible to carry out by executing only the hot water storage operation and the hot water supply priority operation.
[0079]
(4) In the above-described embodiment, the heating unit 4 includes the heat pump heating unit 33, the engine exhaust heat utilization heating unit 34, and the auxiliary heating unit 35. For example, the heating unit 4 includes the heat pump heating. It is possible to configure the unit 33 and the auxiliary heating unit 35, and the configuration of the heating unit 4 can be appropriately changed.
[0081]
(5In the above embodiment, the engine heat pump type air conditioner B that air-conditions the air-conditioning target space is exemplified as the heat source means. However, for example, a gas engine that drives a generator may be used, and other various heat source means are applicable.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a hot water storage unit.
FIG. 2 is a schematic configuration diagram of an engine heat pump type air conditioner.
FIG. 3 is a control block diagram of an engine heat pump air conditioning system.
FIG. 4 is a flowchart showing a control operation in cooling operation.
FIG. 5 is a flowchart showing a control operation in heating operation.
FIG. 6 is a flowchart showing a control operation in hot water storage operation.
[Explanation of symbols]
  B Heat pump device as heat source means
  E Hot water storage meansAs a hot water circulation means
  U Operation control means

Claims (4)

A heat source means for performing a heat supply operation, a hot water circulation means as hot water storage means for heating hot water in the hot water storage tank with unnecessary heat of the heat source means, and a hot water circulation means as the heat source means and the hot water storage means . Operation control means for controlling operation is provided,
The operation control means is a hot water storage type hot water supply heat source device configured to operate the heat source means when there is a heat request to the heat source means,
The operation control means determines whether or not the operation status of the heat source means is a situation where it can be predicted that the operation will continue for more than the set time for hot water storage,
When the operating status of the heat source means is a status that can be predicted to be continuously operated for the set time for hot water storage , the hot water circulating means as the hot water storage means is operated, and the operating status of the heat source means is the hot water storage A hot water storage type hot water supply heat source device configured to prohibit the operation of the hot water circulation means as the hot water storage means when it is not in a situation where it can be predicted that the operation will continue for more than the set time. When the heat source means is operating after the heat supply operation has been performed for a set time for determining whether or not the heat supply operation has passed, the operation status of the heat source means may be continuously operated for the set time for hot water storage or longer. The hot water storage type hot water supply heat source device according to claim 1, wherein the hot water storage heat source device is configured to determine that the situation is predictable. In the hot water storage time zone set so that the heat source means can be predicted to operate continuously for the set time for hot water storage or more, the operation state of the heat source means continues for the set time for hot water storage or more. The hot water storage type hot water supply heat source device according to claim 1, wherein the hot water storage heat source device is configured to determine that the operation can be predicted. The heat source means is configured by a heat pump device, and the heat pump device is configured to execute an air conditioning operation for air conditioning a space to be air conditioned as the heat supply operation. A hot water storage heat source device as described in 1.

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