CN109579177B - Air conditioner and hot water supply system - Google Patents
Air conditioner and hot water supply system Download PDFInfo
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- CN109579177B CN109579177B CN201811069739.2A CN201811069739A CN109579177B CN 109579177 B CN109579177 B CN 109579177B CN 201811069739 A CN201811069739 A CN 201811069739A CN 109579177 B CN109579177 B CN 109579177B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
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- Sustainable Development (AREA)
- Signal Processing (AREA)
- Sustainable Energy (AREA)
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- Heat-Pump Type And Storage Water Heaters (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
Provided are an air conditioner and a hot water supply system, which have little influence on the utilization of the air conditioner and can improve the effect of reducing the consumption of primary energy. An air conditioning and hot water supply system (1) is provided with: a heat storage tank (120) for storing heat by solar heat; the air conditioning and hot water supply system (1) uses the heat stored in the heat storage tank (120) to cool and/or heat the air conditioning equipment IU. The air conditioning and hot water supply system (1) further comprises: a heat transfer unit (220) that heats the water in the hot water storage tank (210) by using the heat stored in the heat storage tank (120); a heat transfer control unit for starting heat transfer by the heat transfer unit (220) at a set heat transfer start time and ending heat transfer by the heat transfer unit (220) at a set hot water supply start time.
Description
Technical Field
The present invention relates to an air conditioner and a hot water supply system.
Background
In general, in a solar thermal air-conditioning system, a heat collector heats a heat medium in a heat storage tank by solar heat, and the heat medium having a high temperature is taken out from the heat storage tank in accordance with a load request and supplied to a hot water heating absorption refrigerator or the like to perform air-conditioning. In addition, if necessary, the solar hot water supply system is combined with the heat storage tank, and the high-temperature heat medium in the heat storage tank is used for heating water in the hot water storage tank, so that the hot water supply load can be met.
An air conditioning and hot water supply system in which the solar thermal cooling and heating system and the solar hot water supply system are combined as described above has been proposed (see, for example, patent document 1). In the air conditioning and hot water supply system, the state can be switched among a 1 st state in which water in the hot water storage tank is heated by solar heat, a 2 nd state in which solar heat is stored in the ground, and a 3 rd state in which the heat pump is driven by geothermal heat.
Patent document 1: japanese laid-open patent publication No. 2005-214591
Here, in the air-conditioning and hot water supply system disclosed in patent document 1, there is a demand for priority use of a solar thermal cooling/heating system (that is, priority operation of air-conditioning is desired). In addition, in the above system, if the solar thermal cooling/heating system and the solar hot water supply system cannot be combined and controlled well, solar heat cannot be used effectively, and the effect of reducing the amount of primary energy consumption is reduced.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an air conditioner and a hot water supply system that have little influence on the utilization of the air conditioner and can improve the effect of reducing the amount of primary energy consumed.
Means for solving the problems
An air conditioner and hot water supply system according to the present invention includes: a heat storage tank for storing heat by using solar heat; a hot water storage tank that stores hot water to be supplied to a user, and an air conditioner that performs at least one of cooling and heating of the air conditioner by using heat stored in the heat storage tank, the air conditioner and hot water supply system including: a heat transfer unit for heating the water in the hot water storage tank by using the heat stored in the heat storage tank; a heat transport control unit that starts heat transport by the heat transport unit at a set heat transport start time and ends heat transport by the heat transport unit at a set hot water supply start time.
According to this air conditioner and hot water supply system, since the heat transfer is started at the set heat transfer start time and the heat transfer is ended at the hot water supply start time, the time for the heat transfer is limited, and the heat in the heat storage tank can be transferred to the hot water storage tank without interfering with the use of the air conditioner, thereby raising the temperature of the water in the hot water storage tank. Further, since the heat transfer is finished at the set hot-water supply start time, the water in the hot-water storage tank is cooled to a low temperature at the next hot-water supply start time, and the heat utilization efficiency can be improved. Therefore, the effect on the utilization of the air conditioner can be reduced, and the effect of reducing the consumption of the primary energy can be improved.
In addition, in the air conditioning and hot water supply system, it is preferable that the air conditioning and hot water supply system further includes: an estimation unit that estimates a future air conditioning load; and a calculation setting unit configured to calculate and set a heat transport start time of the heat transport unit based on the air conditioning load estimated by the estimation unit, wherein the heat transport control unit starts heat transport by the heat transport unit at the heat transport start time set by the calculation setting unit, and ends heat transport by the heat transport unit at the set hot water supply start time.
According to this air conditioning and hot water supply system, since the future air conditioning load is estimated and the heat transfer start time is calculated and set based on the estimated air conditioning load, the heat transfer start time is advanced when the air conditioning load is small and delayed when the air conditioning load is large. Therefore, the heat of the heat storage tank can be transferred to the hot water storage tank without interfering with the utilization of the air conditioner more accurately, and the temperature of the water in the hot water storage tank can be increased. Therefore, the effect on the utilization of the air conditioner can be further reduced, and the effect of reducing the consumption of primary energy can be improved.
In the air conditioning and hot water supply system, it is preferable that the system further includes a period determination unit that determines whether or not an intermediate period other than a cooling/heating period in which cooling or heating is currently performed is included, and the heat transport control unit performs heat transport by the heat transport unit regardless of the heat transport start time and the hot water supply start time when the period determination unit determines that the period is the intermediate period.
According to this air conditioner and hot water supply system, when it is determined that the heat storage tank is in the intermediate stage, the heat storage tank is heated by the heat in the heat storage tank actively during the intermediate stage in which the air conditioner is hardly used, and the effect of reducing the amount of primary energy consumption can be further improved.
In addition, in the air conditioning and hot water supply system, it is preferable that the air conditioning and hot water supply system further includes: a heating source for heating the water in the hot water storage tank by using heat different from the heat transmission unit; and a heating source control unit for heating by the heating source when the temperature of the water in the hot water storage tank is judged to be not higher than a predetermined temperature in a heating period from a set heating start time to the hot water supply start time.
According to the air conditioner and the hot water supply system, since the heating source heats the water in the hot water storage tank when it is determined that the temperature of the water is not higher than the predetermined temperature within the set heating period, the hot water can be supplied to the hot water supply load by heating the water using the heating source when it is predicted that the amount of heat sufficient to support the hot water supply load is not available based on the temperature of the water. Further, since the heating by the heating source is completed at the hot water supply start time, the water in the hot water storage tank is cooled in consideration of the next heat transfer start time, and the heat utilization efficiency can be improved.
The water temperature is not limited, and may be any temperature range of hot water, cold water, and normal temperature water.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to provide an air conditioner and a hot water supply system that have a small influence on the utilization of the air conditioner and can improve the effect of reducing the amount of primary energy consumption.
Drawings
Fig. 1 is a configuration diagram illustrating an air conditioner and a hot water supply system according to an embodiment of the present invention.
Fig. 2 is a block diagram showing details of the control apparatus shown in fig. 1.
Fig. 3 is a flowchart showing an operation performed by the control device according to the present embodiment.
Fig. 4 is a diagram showing an air conditioning load during the cooling period.
Fig. 5 is a diagram showing an air conditioning load during a heating period.
Description of the indicia
1: air conditioner and hot water supply system
100: solar thermal air conditioning system
120: heat storage tank
200: hot water supply system
210: hot water storage tank
220: heat transfer part
230: heating source
400: control device
410: period judging section
420: heat transfer control part
430: estimation part
440: calculation setting unit
450: heating source control unit
IU: indoor machine (air-conditioning equipment)
t 0: hot water supply start time
t 1: starting time of heating
t2, t 3: heat transfer start time
Detailed Description
The present invention will be described below based on preferred embodiments. The present invention is not limited to the embodiments described below, and can be modified as appropriate without departing from the scope of the present invention. In the embodiments described below, although some parts are not shown or described, it is needless to say that known or publicly known techniques can be appropriately applied to the details of the omitted technique within a range not contradictory to the contents described below.
Fig. 1 is a configuration diagram illustrating an air conditioner and a hot water supply system according to an embodiment of the present invention. As shown in fig. 1, the air conditioning and hot water supply system 1 includes a solar thermal air conditioning system 100, a hot water supply system 200, a geothermal air conditioning system 300, a control device 400 for controlling these systems, and an indoor unit (air conditioning equipment) IU.
The solar thermal air conditioning system 100 includes a solar thermal collector 110, a heat storage tank 120, a hot water heating absorption refrigerator 130, a heat exchanger 140, various pipes R1 to R12, various pumps P1 to P5, and 1 st and 2 nd three-way valves V1 and V2.
The solar thermal collector 110 is installed on a roof of a house, a building, or the like having good sunlight, and heats a thermal medium by sunlight. The solar thermal collector 110 and the heat storage tank 120 are connected by a 1 st heat medium forward pipe R1 and a 1 st heat medium return pipe R2. The 1 st heat medium forward pipe R1 and the 1 st heat medium return pipe R2 connect the solar heat collector 110 and the heat storage tank 120, and the heat medium flows inside. The heat medium circulates through the solar thermal collector 110 and the heat storage tank 120 via the 1 st heat medium outward-flowing pipe R1 and the 1 st heat medium return-flowing pipe R2.
The heat storage tank 120 stores the heat medium heated by the solar thermal collector 110 to store heat. The heat collection pump P1 is a power for feeding the heat medium in the heat storage tank 120 to the solar thermal collector 110, and is provided on the 1 st heat medium forward pipe R1. By the operation of the heat collecting pump P1, the heat medium circulates between the solar heat collector 110 and the heat storage tank 120. The heat storage tank 120 is provided with a 1 st temperature sensor T1 for detecting the temperature of the heat medium inside. The temperature signal from the 1 st temperature sensor T1 is sent to the control device 400.
The heat storage tank 120 and the hot water heating absorption refrigerator 130 are connected by a 2 nd heat medium outward-flow pipe R3 and a 2 nd heat medium return pipe R4. The 2 nd heat medium forward pipe R3 and the 2 nd heat medium return pipe R4 connect the heat storage tank 120 and the hot water heating absorption refrigerator 130, and the heat medium flows inside. The heat medium pump P2 is provided in the 2 nd heat medium outgoing pipe R3 and serves as power for feeding the heat medium in the heat storage tank 120 to the hot water heating absorption refrigerator 130. By operating the heat medium pump P2, the heat medium circulates between the heat storage tank 120 and the hot water heating absorption refrigerator 130.
The hot-water-heating absorption refrigerator 130 obtains cold water by using an absorption refrigeration cycle of an evaporator, an absorber, a regenerator, and a condenser. The 2 nd heat medium outward-flow pipe R3 and the 2 nd heat medium return pipe R4 of the hot water heating absorption refrigerator 130 according to the present embodiment are connected to a regenerator, and the refrigerant is boiled and separated from the absorption liquid (for example, lithium bromide) that has absorbed the refrigerant (for example, water) by the heat medium from the heat storage tank 120. Further, the hot water heating absorption chiller 130 has a cold water inlet pipe R5 and a cold water return pipe R6 connected to the evaporator. The cold water inlet pipe R5 and the cold water return pipe R6 are configured such that cold water cooled by the hot water heating absorption refrigerator 130 flows and are connected to the indoor unit IU side. The indoor unit IU cools the air by using the cold water from the hot-water-heating absorption refrigerator 130 (i.e., the cold water obtained by using the heat stored in the heat storage tank 120). The air conditioning and hot water supply system 1 according to the present embodiment is assumed to be used in facilities having many rooms, such as a special nursing home, and includes many (a plurality of) indoor units IU.
The hot water heating absorption chiller 130 is connected to a cooling tower 131. The cooling tower 131 is configured to supply cooling water to the absorber and the condenser of the hot water heating absorption chiller 130 through the cooling water pipe R7. The cooling water pipe R7 is provided with a cooling water pump P3 that is a motive power for feeding cooling water.
Further, a circulation pump P4 is provided in the cold water return pipe R6, and cold water is circulated between the hot water absorption chiller 130 and the indoor unit IU. Further, an inlet header H1 and a return header H2 are provided between the hot-water absorption chiller 130 and the indoor unit IU. The inlet header H1 is connected to the return header H2 by the indoor pipe R8 via the indoor unit IU. A calorimeter Q for measuring the amount of heat consumed by the indoor unit IU is provided in the indoor pipe R8. The measurement signal obtained by the calorimeter Q is transmitted to the control device 400. Further, an indoor pump P5 is provided in the indoor pipe R8 and serves as power for conveying cold water from the inlet header H1 to the return header H2 through the indoor unit IU.
A 1 st three-way valve V is provided between the heat medium pump P2 and the hot water absorption chiller 130 in the 2 nd heat medium outgoing pipe R3. The 1 st three-way valve V1 is connected to one end of the heat medium branching pipe R9. The other end of the heat medium branching pipe R9 is connected to the primary side 141 of the heat exchanger 140. The heat medium supplied to the primary side 141 of the heat exchanger 140 through the heat medium branch pipe R9 is returned to the 2 nd heat medium return pipe R4 through the heat medium branch pipe R10. Therefore, by controlling the 1 st three-way valve V1, the heat exchanger 140 can introduce the heat medium from the heat storage tank 120 into the primary side 141, and heat exchange is performed, thereby heating the water flowing through the secondary side 142.
A hot water inlet pipe R11 and a hot water return pipe R12 are connected to the secondary side 142 of the heat exchanger 140. Further, a 2 nd three-way valve V2 is provided in the cold water return pipe R6 between the circulation pump P4 and the hot water absorption chiller 130, and a hot water inlet pipe R11 connects the 2 nd three-way valve V2 to the secondary side 142 of the heat exchanger 140. The hot water return pipe R12 connects the secondary side 142 of the heat exchanger 140 to the cold water inlet pipe R5. Due to such a piping connection relationship, hot water can be supplied to the indoor unit IU side by controlling the 2 nd three-way valve V2. The indoor unit IU is heated by hot water from the secondary side 142 of the heat exchanger 140 (i.e., hot water obtained by using the heat stored in the heat storage tank 120).
The hot water supply system 200 generally includes a hot water storage tank 210, a heat transmission unit 220, a heat source 230, a hot water supply pipe R13, and a water supply pump P6.
The hot water storage tank 210 stores hot water provided to a demander in the facility. The hot water storage tank 210 is connected to the water pipe side and can supply water from the outside. The heat transfer unit 220 heats the water in the hot water storage tank 210 by using the heat stored in the heat storage tank 120. The heat transfer portion 220 includes: a heat transfer pipe 221 through which the water introduced into the hot water storage tank 210 passes through the heat storage tank 120 and returns to the hot water storage tank 210 again; a heat transfer pump 222 for performing circulation of water through the heat transfer pipe 221. The heat source 230 heats water in the hot water storage tank 210 by a heater based on steam or gas from an unillustrated device. The heating source 230 is not limited to heating by steam or gas, and may use electric power or the like as long as the water in the hot water storage tank 210 is heated by heat different from that of the heat transmission unit 220.
The hot water supply pipe R13 is a pipe connected to a shower, a bathtub, a faucet, and the like in a facility. The water supply pump P6 serves as a power source for causing water in the hot water storage tank 210 to flow to the hot water supply pipe R13. In addition, a 2 nd temperature sensor T2 is provided at the hot water storage tank 210 for detecting the temperature of water inside. The temperature signal from the 2 nd temperature sensor T2 is sent to the control device 400.
The geothermal air-conditioning system 300 roughly includes a geothermal heat exchanger 310, a geothermal heat pump 320, various pipes R14 to R17, and pumps P7 and P8.
The geothermal heat exchanger 310 is constituted by pipes laid at a depth of 100m in the ground, for example. The temperature is constant regardless of the season, for example, about 12 to 18 ℃ in the deep underground. The geothermal heat exchanger 310 is supplied with the heat medium at the temperature range. The geothermal heat exchanger 310 is connected to the primary side 321 of the geothermal heat pump 320 by a geothermal heat intake pipe R14 and a geothermal heat return pipe R15. In addition, a geothermal heat pump P7 is provided in the geothermal return pipe R15, and serves as a power source for circulating a heat medium between the geothermal heat exchanger 310 and the primary side 321 of the geothermal heat pump 320.
A cold/hot water inlet pipe R16 and a cold/hot water return pipe R17 are connected to the secondary side 322 of the geothermal heat pump 320. Cold and hot water inlet pipe R16 is connected to inlet header H1, and cold and hot water return pipe R17 is connected to return header H2. Further, a hot and cold water pump P8 is provided in the hot and cold water return pipe R17. The hot and cold water pump P8 serves as a power source for circulating hot and cold water through the secondary side 322 of the geothermal heat pump 320 and the indoor unit IU. The indoor unit IU performs cooling and heating using cold and hot water delivered from the secondary side 322 of the geothermal heat pump 320.
The control device 400 controls the whole of the air conditioning and hot water supply system 1 including the solar thermal air conditioning system 100, the hot water supply system 200, and the geothermal air conditioning system 300 as described above. Fig. 2 is a block diagram illustrating details of the control device 400 illustrated in fig. 1.
As shown in fig. 2, the control device 400 includes a period determination unit 410, a heat transfer control unit 420, an estimation unit 430, a calculation setting unit 440, and a heat source control unit 450.
The period determination unit 410 determines whether the current period is a cooling period, a heating period, or an intermediate period. The period judging section 410 determines the current time point (current) based on date and time information from the outside or the clock function section. The period determination unit 410 stores, for example, calendar information, and determines whether the current period is a cooling period, a heating period, or an intermediate period based on the determined current time point and the calendar information. The cooling period is a period in which cooling is to be performed, and the heating period is a period in which heating is to be performed. The intermediate period is a period other than the cooling period and the heating period, and is a period in which neither cooling nor heating is performed. Further, the period determination unit 410 may determine whether the cooling period, the heating period, or the intermediate period is currently performed based on a signal from an outside air temperature sensor that outputs a signal corresponding to the outside air temperature.
The heat transfer control unit 420 controls the heat transfer performed by the heat transfer unit 220. The heat transport control unit 420 determines whether or not the heat transport is possible based on the signals from the 1 st temperature sensor T1 and the 2 nd temperature sensor T2. At this time, the heat transfer control unit 420 can determine that the temperature of the heat medium in the heat storage tank 120 is equal to or higher than the 1 st set temperature (for example, 60 ℃) and that the heat transfer is possible when the temperature of the cold water in the hot water storage tank 210 is equal to or lower than the 3 rd set temperature (for example, 50 ℃). That is, when the heat medium temperature of the heat storage tank 120 is higher than the cold/hot water temperature of the hot water storage tank 210 by a predetermined temperature or more, it is determined that the heat transfer is possible.
On the other hand, the heat transfer control unit 420 determines that the heat transfer is not to be performed when it determines from the heat transfer enabled state that the temperature of the heat medium in the heat storage tank 120 is equal to or lower than the 2 nd set temperature (for example, 50 ℃) or when it determines that the temperature of the hot/cold water in the hot water storage tank 210 is equal to or higher than the 4 th set temperature (for example, 55 ℃). In this way, the heat transport control unit 420 determines the temperature with hysteresis when determining the heat transport enabled state.
Further, the heat transport control unit 420 performs heat transport only when the following conditions are satisfied even in a state in which heat transport is possible. First, the heat transfer control unit 420 determines whether or not it is currently an intermediate period by the period determination unit 410. When determining that the current period is the intermediate period, the heat transfer control unit 420 performs heat transfer (drives the heat transfer pump 222) by the heat transfer unit 220 to heat the hot and cold water in the hot water storage tank 210. On the other hand, the heat transfer control unit 420 limits the time for driving the heat transfer pump 222 when determining that the cooling period or the heating period is not the intermediate period at present. At this time, the heat transport control unit 420 starts the heat transport by the heat transport unit 220 at the set heat transport start time, and ends the heat transport at the set hot water supply start time.
Here, the heat transfer start time may be a preset time or a calculated and set time. In addition, when the calculation and setting are performed, the estimation unit 430 and the calculation setting unit 440 function. In the present embodiment, a facility such as a special nursing home is assumed, and therefore, the hot water supply load is increased at a specific time (for example, 6 pm) when the bathroom is frequently used. The hot water supply start time is preset to such a specific time. The heat transfer start time and the hot water supply start time may be set by the user at each time. The hot water supply start time may be calculated and set.
The estimation unit 430 estimates a future air conditioning load. The estimation unit 430 learns the air conditioning load based on the heat amount measured by the calorimeter Q, and estimates the future air conditioning load using the learning result. More specifically, the estimation unit 430 measures and stores the air conditioning load pattern for a predetermined period (for example, several days to 1 week) and the cumulative heat amount of the air conditioning load for 1 day by using the calorimeter Q. The estimation unit 430 compares the air-conditioning load pattern at the current time of the day with the stored contents, estimates the air-conditioning load pattern at and after the current time of the day, and estimates the cumulative heat amount of the air-conditioning load at and after the current time.
The calculation setting unit 440 calculates the heat transfer start time and sets the time. Specifically, the calculation setting unit 440 calculates and sets the heat transfer start time at a time point when the future air conditioning load (air conditioning load integrated heat) is equal to or less than the predetermined load Q1, based on the air conditioning load estimated by the estimation unit 430. In the case where the heat transport start time can be set in units of 10 minutes, the heat transport start time is calculated and set as the time of 10 minutes closest to the time at which the predetermined load Q1 or less is reached.
The heat source control part 450 controls the driving of the heat source 230. The heat source controller 450 performs heating by the heat source 230 when determining that the temperature of the water in the hot water storage tank 210 has not reached a predetermined temperature or higher in a heating period from a set heating start time to a hot water supply start time. Here, the heating start time is a preset time, but is not limited to this, and may be a time set by the user at a time or a time calculated and set. In the case of the calculation setting, the estimation unit 430 may estimate the hot water supply load similarly to the air conditioning load, and the calculation setting unit 440 may drive and control the heating source 230 to secure the amount of heat corresponding to the hot water supply load.
Next, a control flow performed by the control device 400 according to the present embodiment will be described. Fig. 3 is a flowchart illustrating an operation performed by the control device 400 according to the present embodiment. The flowchart shown in fig. 3 is repeatedly executed until the power of the control device 400 is turned off.
As shown in fig. 3, the heat transport control unit 420 first determines whether or not the heat transport is possible (S1). The heat transferrable state is judged based on the above temperature condition. If it is determined that the heat transport is not possible (no in S1), the heat transport control unit 420 stops the heat transport pump 222 (S5). Then, the process proceeds to step S11.
If it is determined that heat transfer is possible (yes in S1), the period determination unit 410 determines whether or not the current period is an intermediate period (S2). If it is determined that the current period is the middle period (yes in S2), the control device 400 determines whether or not the nighttime stop control is in progress (S3). In the present embodiment, for example, if it is determined that the amount of heat radiation from the hot water storage tank 210, piping, etc. for heat transfer is smaller from the morning than when the heat transfer is performed late at night, the night stop control is performed, and the heat transfer is prohibited for a time period of 0 to 9 o' clock in late night. In addition, if it is determined that it is preferable to heat the hot water storage tank 210 as quickly as possible by predicting the heat collection condition or the like calculated the next day, control may be performed so as not to stop at night.
If it is determined that the nighttime stop control is not being performed (no in S3), the heat transport control unit 420 drives the heat transport pump 222 (S4). Then, the process proceeds to step S11. On the other hand, if it is determined that the night time stop control is in progress (S3: YES), the heat transport control unit 420 sets the heat transport pump 222 to a stopped state (S5). Then, the process proceeds to step S11.
If it is determined that the current period is not the intermediate period (no in S2), the period determination unit 410 determines whether or not the current period is the cooling period (S6). When it is determined that the current time is not the cooling period (no in S6), that is, when it is determined that the current time is the heating period, the heat transport control unit 420 determines whether or not the current time is a period from a preset heat transport start time t3 to a hot water supply start time t0 (S7).
When it is determined that the time is from the heat transport start time t3 to the hot water supply start time t0 (yes in S7), the heat transport control unit 420 drives the heat transport pump 222 (S4). Then, the process proceeds to step S11. On the other hand, if it is determined that the time period from the heat transport start time t3 to the hot water supply start time t0 is not included (S7: no), the heat transport control unit 420 sets the heat transport pump 222 to the stopped state (S5). Then, the process proceeds to step S11.
If it is determined that the current time is the cooling period (yes in S6), the estimating unit 430 estimates the future air conditioning load (S8). Next, the calculation setting unit 440 calculates and sets the heat transmission start time t2 at a time when the future air conditioning load (air conditioning load integrated heat quantity) is equal to or less than the scheduled load Q1 (S9). Then, the heat transport control unit 420 determines whether or not the current time is the period from the heat transport start time t2 to the hot water supply start time t0 set in step S9 (S10).
When it is determined that the time is from the heat transport start time t2 to the hot water supply start time t0 (yes in S10), the heat transport control unit 420 drives the heat transport pump 222 (S4). Then, the process proceeds to step S11. On the other hand, if it is determined that the time period from the heat transport start time t2 to the hot water supply start time t0 is not included (S10: no), the heat transport control unit 420 sets the heat transport pump 222 to the stopped state (S5). Then, the process proceeds to step S11.
In the flowchart shown above, the estimation unit 430 and the calculation setting unit 440 function only in the cooling period. This is based on the following reason. Fig. 4 is a diagram showing an air conditioning load in the cooling period, and fig. 5 is a diagram showing an air conditioning load in the heating period.
As shown in fig. 4, in the cooling period, the temperature is high in the daytime, and therefore, the cooling load in the daytime increases, and tends to decrease as the night shifts to the nighttime. The estimation unit 430 estimates the cooling load shown in fig. 4 based on the stored content. The calculation setting unit 440 calculates, as the heat transfer start time, a time t2 at which the predetermined load Q1 or less is reached, for example, based on the cooling load estimated by the estimation unit 430. The time t2 is later than the time t 3.
On the other hand, as shown in fig. 5, in recent years, passive buildings, and buildings with high heat insulation and high air tightness are adopted, and the heating load tends to decrease. In such a building, as shown in fig. 5, the heating load during the warm daytime is, for example, substantially zero, and a plurality of heating loads are generated during the night from the evening to the morning. Since the heating load is small as described above, for example, the air conditioning load for 1 day is equal to or less than the predetermined load Q1, the estimation unit 430 and the calculation setting unit 440 do not function. At this time, the heat transfer start time is time t3 determined by design, and the heat transfer time is longest.
Reference is again made to fig. 3. In step S11, the heat source control part 450 determines whether the current time is a heating period from the set heating start time t1 to the hot water supply start time t0 (S11). If it is determined as the heating time period (yes in S11), the heating source control part 450 determines whether or not the temperature of water in the hot water storage tank 210 is a predetermined temperature or higher (S12). When it is determined that the temperature is not equal to or higher than the predetermined temperature (no in S12), the heat source controller 450 performs heating using the heat source 230 (S13). After that, the processing shown in fig. 3 ends. On the other hand, when it is determined that the heating period is not the heating period (no in S11) or when it is determined that the temperature is equal to or higher than the predetermined temperature (yes in S12), the heating source control part 450 does not drive the heating source 230 and does not perform heating (S14). After that, the processing shown in fig. 3 ends.
As described above, according to the air conditioner and hot water supply system 1 of the present embodiment, since the heat transfer is started at the set heat transfer start times t2 and t3 and the heat transfer is ended at the hot water supply start time t0, the time for performing the heat transfer is limited, and thus the heat in the heat storage tank 120 can be transferred to the hot water storage tank 210 without interfering with the use of the air conditioner, and the temperature of the water in the hot water storage tank 210 can be raised. Further, since the heat transfer is finished at the set hot water supply start time t0, the water in the hot water storage tank 210 is cooled to a low temperature in consideration of the next heat transfer start times t2 and t3, and the heat utilization efficiency can be improved. Therefore, the effect on the utilization of the air conditioner can be reduced, and the effect of reducing the consumption of the primary energy can be improved.
Further, since the heat transfer is terminated at the set hot-water supply start time t0, when the heat in the heat storage tank 120 is excessive, it can be ensured that the heat storage tank is used for air conditioning on the next day or the like.
Further, since the future air conditioning load is estimated and the heat transfer start time t2 is calculated and set based on the estimated air conditioning load, the heat transfer start time t2 is advanced when the air conditioning load is small, and the heat transfer start time t2 is delayed when the air conditioning load is large. Therefore, the heat of the heat storage tank 120 can be transferred to the hot water storage tank 210 without disturbing the use of the air conditioner, and the temperature of the water in the hot water storage tank 210 can be raised. Therefore, the effect on the utilization of the air conditioner can be further reduced, and the effect of reducing the consumption of primary energy can be improved.
Further, when it is determined that the period is the intermediate period, the heat transfer is performed regardless of the heat transfer start times t2 and t3 and the hot water supply start time t0, and therefore, the water in the hot water storage tank 210 can be actively heated by the heat in the heat storage tank 120 during the intermediate period in which the air conditioner is hardly used, and the effect of reducing the amount of primary energy consumption can be further improved.
In addition, since the heating source 230 heats the water in the hot water storage tank 210 when it is determined that the temperature of the water is not higher than the predetermined temperature in the set heating period, the heating source 230 can heat the water to support the hot water supply load when it is predicted that there is not enough heat to support the hot water supply load based on the temperature of the water. Further, since the heating by the heating source 230 is completed at the hot water supply start time t0, the water in the hot water storage tank 210 can be cooled to a low temperature and the heat utilization efficiency can be improved in consideration of the next heat transmission start times t2 and t 3.
The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments, and modifications can be made without departing from the scope of the present invention, and other techniques can be appropriately combined within the possible scope. Also, the known or known techniques may be combined to the extent possible.
For example, in the flowchart shown in fig. 4, the heating period estimation unit 430 and the calculation setting unit 440 are configured not to function, but the estimation unit 430 and the calculation setting unit 440 may function during the heating period in a case where the building is not a passive building or the like, a cold place, or the like. The refrigeration cycle estimating unit 430 and the calculation setting unit 440 may not function.
In the above embodiment, the time t3 determined by design is set as the heat transfer start time in the heating period, but the present invention is not limited thereto, and the time t3 determined by design may be set as the heat transfer start time in the cooling period.
In the present embodiment, the indoor unit IU can perform both cooling and heating, but is not limited to this, and may perform only cooling or heating. In addition, in the case where the indoor unit IU is configured to perform only single-function air conditioning such as cooling, for example, the heat transfer may be performed in the same manner as in the intermediate period, because there is no opportunity to perform air conditioning using the heat of the heat storage tank 120 during the period in which another function air conditioning is performed, such as the heating period.
Claims (3)
1. An air conditioner and hot water supply system includes: a heat storage tank for storing heat by using solar heat; a hot water storage tank storing hot water to be supplied to a user; and an air conditioner that performs at least one of cooling and heating by the air conditioning and hot water supply system using the heat stored in the heat storage tank,
the air conditioner and hot water supply system further includes:
a heat transfer unit for heating the water in the hot water storage tank by using the heat stored in the heat storage tank;
a heat transport control unit that starts heat transport by the heat transport unit at a set heat transport start time and ends heat transport by the heat transport unit at a set hot water supply start time;
an estimation unit that estimates a future air conditioning load from a learning result of the amount of heat consumed by the air conditioning equipment;
a calculation setting unit that calculates and sets a heat transfer start time of the heat transfer unit based on the air conditioning load estimated by the estimation unit,
the heat transport control unit starts heat transport by the heat transport unit at the heat transport start time set by the calculation setting unit, and ends heat transport by the heat transport unit at the set hot water supply start time.
2. The air conditioning and hot water supply system as claimed in claim 1,
further comprises a period judging part for judging whether the current period is an intermediate period except the cooling and heating period for cooling or heating,
the heat transport control unit performs heat transport by the heat transport unit regardless of the heat transport start time and the hot water supply start time when the period determination unit determines that the period is the intermediate period.
3. The air conditioning and hot water supplying system as claimed in claim 1 or 2, further comprising:
a heating source for heating the water in the hot water storage tank by heat different from the heat transmission unit;
and a heating source control unit that performs heating using the heating source when it is determined that the temperature of the hot water in the hot water storage tank is not higher than a predetermined temperature in a heating period from a set heating start time of the heating source to the hot water supply start time.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2017-175552 | 2017-09-13 | ||
| JP2017175552A JP6683660B2 (en) | 2017-09-13 | 2017-09-13 | Air conditioning hot water supply system |
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| Publication Number | Publication Date |
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| CN109579177A CN109579177A (en) | 2019-04-05 |
| CN109579177B true CN109579177B (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811069739.2A Active CN109579177B (en) | 2017-09-13 | 2018-09-13 | Air conditioner and hot water supply system |
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| JP (1) | JP6683660B2 (en) |
| CN (1) | CN109579177B (en) |
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| JPS5935741A (en) * | 1982-08-20 | 1984-02-27 | Sanyo Electric Co Ltd | Solar cooling/heating system |
| JP2005214591A (en) * | 2004-02-02 | 2005-08-11 | Sunpot Co Ltd | Hot water supply system utilizing natural energy |
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| JP2009210162A (en) * | 2008-02-29 | 2009-09-17 | Ulvac-Riko Inc | Power generating/hot water supply system |
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| CN102401508A (en) * | 2010-07-23 | 2012-04-04 | Lg电子株式会社 | Heat pump-type hot water feeding apparatus |
| JP2014214989A (en) * | 2013-04-26 | 2014-11-17 | リンナイ株式会社 | Hot water storage hot water supply device |
| CN105652665A (en) * | 2016-03-03 | 2016-06-08 | 东南大学 | Coordinated control method of cooling-heating-power cogeneration system of micro gas turbine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6693063B2 (en) * | 2015-07-28 | 2020-05-13 | 株式会社ノーリツ | Housing equipment control device |
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2017
- 2017-09-13 JP JP2017175552A patent/JP6683660B2/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5935741A (en) * | 1982-08-20 | 1984-02-27 | Sanyo Electric Co Ltd | Solar cooling/heating system |
| JP2005214591A (en) * | 2004-02-02 | 2005-08-11 | Sunpot Co Ltd | Hot water supply system utilizing natural energy |
| CN2802385Y (en) * | 2005-06-27 | 2006-08-02 | 陆海汶 | Solar heat pump and air-conditioning system of summer and winter using the heat pump |
| JP2009210162A (en) * | 2008-02-29 | 2009-09-17 | Ulvac-Riko Inc | Power generating/hot water supply system |
| KR20110066780A (en) * | 2009-12-11 | 2011-06-17 | 엘지전자 주식회사 | Water circulation system associated with refrigerant system |
| CN102401508A (en) * | 2010-07-23 | 2012-04-04 | Lg电子株式会社 | Heat pump-type hot water feeding apparatus |
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| CN105652665A (en) * | 2016-03-03 | 2016-06-08 | 东南大学 | Coordinated control method of cooling-heating-power cogeneration system of micro gas turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6683660B2 (en) | 2020-04-22 |
| JP2019052781A (en) | 2019-04-04 |
| CN109579177A (en) | 2019-04-05 |
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