TWI377325B - - Google Patents

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Publication number
TWI377325B
TWI377325B TW096101941A TW96101941A TWI377325B TW I377325 B TWI377325 B TW I377325B TW 096101941 A TW096101941 A TW 096101941A TW 96101941 A TW96101941 A TW 96101941A TW I377325 B TWI377325 B TW I377325B
Authority
TW
Taiwan
Prior art keywords
hot water
temperature
storage tank
water storage
heat pump
Prior art date
Application number
TW096101941A
Other languages
Chinese (zh)
Other versions
TW200801407A (en
Inventor
Masami Ogata
Masahiro Hara
Original Assignee
Itomic Kankyou System Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2006126568A priority Critical patent/JP5103567B2/en
Application filed by Itomic Kankyou System Co Ltd filed Critical Itomic Kankyou System Co Ltd
Publication of TW200801407A publication Critical patent/TW200801407A/en
Application granted granted Critical
Publication of TWI377325B publication Critical patent/TWI377325B/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H4/00Fluid heaters using heat pumps
    • F24H4/02Liquid heaters
    • F24H4/04Storage heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00Domestic hot-water supply systems
    • F24D17/02Domestic hot-water supply systems using heat pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H1/00Water heaters having heat generating means, e.g. boiler, flow- heater, water-storage heater
    • F24H1/48Water heaters for central heating incorporating heaters for domestic water
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT GENERATING MEANS, IN GENERAL
    • F24H9/00Details
    • F24H9/20Arrangement or mounting of control or safety devices or methods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/02Heat pumps of the compression type
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12Hot water central heating systems using heat pumps

Description

1377325 (1) Description of the Invention [Technical Field of the Invention] The present invention relates to, for example, a heat pump type hot water supply device and a hot water supply method thereof. [Prior Art]
A conventional heat pump type hot water supply device is a method in which hot water is stored in a hot water storage tank by using a low-cost electricity at night, and the hot water is used during the day (see, for example, Patent Document 1). Next, the hot water stored in the hot water storage tank is supplied as hot water at the original temperature, or mixed with tap water and supplied with a hot water of a moderate temperature. In addition, a heat pump type hot water supply device having a circulation line can also be used as a heat source for heat exchange of hot water in a hot water storage tank. When used as a heat exchanger, set the heat exchanger in a hot water storage tank or separate the heat exchanger from the hot water storage tank (for example, outside the hot water storage tank). By using the heat exchange of the circulation line, reheating of the hot water in the bath, floor heating, etc., to achieve efficient use of the stored hot water. As a heat source such as bath hot water reheating, use low temperature hot water and return to the original hot water storage tank by pumping. Then, when the temperature of the hot water in the hot water storage tank is below the specified value, the hot water is re-boiled, or the auxiliary heater installed in the hot water storage tank is used to raise the hot water temperature. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2005- 1 64 1 54 (2) 1377325 [Problem to be Solved by the Invention] Recently, a heat pump type hot water supply device that uses natural refrigerant based on energy saving or environmental protection At the same time as the increase, the heat pump type hot water supply device itself has progressed into a variety. Additional functions such as the above-mentioned bath reheating, floor heating, and the like.
These additional functions are to provide heat exchange at the heat pump type hot water supply device to reduce the use of energy such as electricity. However, in order to return to the original hot water storage tank as hot water that is used as an additional function, the temperature gradient layer (layering) of the hot water in the hot water storage tank may be disturbed, or the locality may be caused by the heater. If the temperature rises, etc., the problem of hot water cutoff or COP (energy consumption efficiency) is lowered, and sufficient energy saving effect cannot be achieved.
In particular, the condition of the service heat pump type hot water supply device is, for example, an immediate hot water supply that immediately flows out of the faucet, a reheating of the bath, a floor heating, etc., and if the above cycle function is used, it is used as a heat source. The hot water will be very large. Therefore, the above problem is more remarkable if the cycle function of the above conventional method is used. The present invention has been made in an effort to provide a heat pump type hot water supply device which can reduce COP reduction even when heat exchange is performed using a circulation circuit. [Means for Solving the Problem] The heat pump type hot water supply device and the hot water supply method thereof according to the present invention are the inventions for solving the above problems, and the heat pump type hot water supply device of the present invention is -5-(3) 1377325 The arrangement is such that the first hot water storage tank and the second hot water storage tank can be connected to the heat pump type heat source through a circulation line having a low temperature water side pipe and a high temperature water side pipe, and can be discharged from the hot water storage tank. The low-temperature water is supplied to the heat exchanger of the heat pump type heat source through the low-temperature water side piping, and the high-temperature water heated by the heat exchanger is passed through the high-temperature water side piping into the heat pump type hot water supply apparatus of the storage tank, and The high-temperature water heated by the heat exchanger is selectively stored in the hot water storage tank by a conversion means.
The heat pump type hot water supply device of the present invention may be configured such that the first hot water storage tank and the second hot water storage tank are connected to a heat pump type heat source through a circulation line having a low temperature water side pipe and a high temperature water side pipe. The low-temperature water discharged from the hot water storage tank is supplied to the heat exchanger of the heat pump type heat source through the low-temperature water side piping, and the high-temperature water heated by the heat exchanger is sent to the storage tank through the high-temperature water side piping. In the heat pump type hot water supply device, the hot water heated by the heat exchanger is selectively stored in the hot water storage tank by means of a conversion means provided in the circulation line, and hot water of a predetermined temperature can be separately stored in each heat. The water storage tank, which is a flow rate adjusting means for controlling the flow rate of the hot water flowing in the circulation line, is disposed in the circulation line. In the heat pump type hot water supply device of the present invention, the low temperature water side pipe is transmitted through the switching valve to connect the first branch pipe connected to the first hot water storage tank to the low temperature water side and to the second hot water. The second branch pipe of the low temperature water side of the storage tank is connected, and the high temperature water side pipe passes through the switching valve to connect the first branch pipe connected to the high temperature water side of the first hot water storage tank and the second hot water storage tank. The high temperature water side 2nd branch pipe • 6- (4) 1377325 The formation of the connection is preferred. In addition, the first hot water storage tank of the heat pump type hot water supply device of the present invention may be configured, and the plurality of hot water storage tanks may be arranged in series through the pipes, and the hot water storage tanks may be provided for storing the hot water in each of the hot water storage tanks. The temperature sensor for detecting the temperature of the hot water in the storage tank stops the hot water storage operation when the previously set temperature sensor detects that the hot water is the set temperature.
Further, in the second hot water storage tank of the heat pump type hot water supply device of the present invention, a circulation line for circulating hot water in the second hot water storage tank may be provided. The second hot water storage tank of the heat pump type hot water supply device of the present invention is configured to return hot water supplied to the external heat exchanger. The heat pump type hot water supply method of the present invention is a heat pump type hot water supply method using the heat pump type hot water supply device, and the first hot water storage tank is used as a hot water storage tank for hot water supply, and transmission control The flow rate adjusting means causes a small amount of hot water to flow to the heat exchanger and the circulation line to operate by boiling water, and uses the second hot water storage tank as a heat storage layer, and controls the flow rate adjusting means to cause a large amount of hot water to flow to The heat exchanger and the circulation line thereby store hot water having a lower temperature than the first hot water storage tank. The heat pump hot water supply method of the present invention having the above configuration may be configured such that the first hot water storage tank is formed as a temperature gradient layer at the boundary between the high temperature water and the non-boiling water low temperature water after the boiling water, and the plurality of the hot water storage tanks are configured to be non-destructive. In the case of the temperature gradient layer, a small amount of hot water is stored while being stored in the heat exchanger and the circulation line, and the temperature gradient layer of the high temperature water storage amount after the boiling water is changed (5) 1377325 is detected. The temperature sensor stops the boiling water operation when the preset temperature sensor detects the set temperature.
Further, the heat pump hot water supply method of the present invention having the above configuration may be configured such that the first hot water storage tank is formed as a temperature gradient layer at the boundary between the high temperature water and the non-boiling water low temperature water after the boiling water, and the plurality of In the case where the temperature gradient layer is not damaged, a small amount of hot water is stored while being stored in the heat exchanger and the circulation line, and the temperature gradient layer detected at the position where the high-temperature water storage amount after boiling water is changed is detected. When the temperature sensor that is set in advance detects the set temperature, the boiling water operation is stopped, and the switching means is used to perform the conversion. In the second hot water storage tank, the flow rate adjusting valve is controlled to be fully opened to allow a large amount of hot water. The hot water for storing heat is stored while flowing into the heat exchanger and the circulation line, and when the temperature sensor provided in the second hot water storage tank detects a predetermined temperature, the hot water storage operation is stopped.
The heat pump hot water supply method of the present invention may be configured to set a priority order of use of the first hot water storage tank or the second hot water storage tank, and to preferentially set the operation. Further, the heat pump type hot water supply method of the present invention may be constituted by a single heat pump type heating source and not mixed with water, and controls the hot water outflow and hot water storage at a plurality of temperatures. [Effect of the Invention] According to the present invention, even in a heat pump type hot water supply device having a plurality of circulation circuits, it is possible to suppress a decrease in COP. 1377325 (6) BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Fig. 1 to Fig. 5 are views showing an embodiment of a heat pump type hot water supply apparatus of the present invention. Fig. 1 is a schematic diagram of a heat pump type hot water supply device. The heat pump type hot water supply device 1 includes a first hot water storage tank 2, a second hot water storage tank 4, and a heat pump type heating source that can circulate hot water of a specified temperature to the two hot water storage tanks 2, 4. (heat source machine) 10.
The heat source unit 10 is configured by a compressor (not shown), a heat exchanger 11 and an expansion valve (not shown), and an evaporator (not shown). Next, the heat exchange line 12 formed in the heat exchanger 11 is continuously connected to the pipe 13 and the outflow pipe 14. The low-temperature water from the first hot water storage tank 2 and the second hot water storage tank 4 flows in the inflow pipe (low temperature water side pipe) 13 and is heated in the heat exchanger 1 1 . The high-temperature water after heating is formed in the flow-out pipe (high-temperature water side pipe), and is appropriately supplied to the first hot water storage tank 2 and the second hot water storage tank 4. The inflow pipe 13 is provided with a pump P1 and a water proportional valve (flow rate adjusting valve) 15 which is a flow rate adjusting means for regulating the flow of water in the inflow pipe 13. The temperature of the hot water supplied from the heat source unit 10 can be set by controlling the amount of water by the water proportional valve 15. For example, the water proportional valve 15 can be fully opened to produce hot water. In addition, the flow adjustment means can also be used to adjust the pump with variable flow, and is not particularly limited. The first hot water storage tank 2 is composed of a plurality of hot water storage tanks, and the low temperature is -9 - (8) 1377325 10, and the specified temperature is heated to the first hot water storage tank 2 and the second heat. One of the water storage tanks 4. A hot water supply pipe (hot water outflow pipe) 20 is connected to the top of the fifth hot water storage tank 2e. The hot water supply pipe 20 is provided with a constant water amount valve 21, a mixing valve 22 that can mix hot water and tap water in the hot water supply pipe 20, and the like.
A heat exchange circulation line (circulation line) 25 for reheating the hot water in the bathtub 33 is connected to the second hot water storage tank 4. The heat exchange circulation line 25 has an outflow line 28 that can discharge hot water from the top of the second hot water storage tank 4 to the heat exchange line 27 of the external heat exchanger 26; and heat that can flow out of the heat exchanger 27. The water returns to the inflow line 30 on the lower side of the storage tank 4. In the outflow line 28, the hot water supply line 20 for supplying the hot water in the first hot water storage tank 2 to a faucet such as a kitchen, a bathroom canopy head, and a bathtub 33 is connected. The inflow line 30 is provided with a circulation pump P2 that can circulate the hot water in the second hot water storage tank 4 through the heat exchanger 25. A reheating circulation line 35 is connected to the bathtub 33. In other words, the reheating circulation line 35' is provided with the outward piping 36 and the return piping 37' connected to the bathtub 33. The outward piping 36 and the return piping 37 are formed by the hot parent exchange line 38 of the heat exchanger 26. connection. Further, in the out-of-way piping 36, a reflowing pump P3 is provided. The outflow line 28 and the inflow line 3 are connected to the bypass line 40 through the three-way valve 39. Further, a drain pipe 41 is connected to the bottom of each of the first water storage tank 2 and the second hot water storage tank 4. -11 - (9) 1377325
Each of the water storage tanks 2a to 2e is provided with temperature sensors T1 to T6 capable of detecting the temperature of the hot water in each of the storage tanks at a predetermined position. Further, the second hot water storage tank 4 is provided with a temperature sensor T7. Then, the temperature of the hot water detected by the root temperature sensors T1 to T7 is controlled by the heat source three-way valves 7, 17 and the pumps P1 to P3 and the water proportional valve 15, and the heat pump type is constructed for the above. Description of the hot water supply device. When the hot water is stored in the first hot water storage tank 2, as shown in FIG. 2, the heat source unit 10 is driven, so that the hot water is exchanged in the heat exchanger 11 to a high temperature, and the water is discharged through the piping 14, The three-way P and the first branch pipe 18 flow into the top of the fifth hot water storage 2e as indicated by an arrow symbol A. The high-temperature water and water that has flowed into the fifth hot water storage tank 2e are sequentially supplied to the communication pipe 3d, the fourth hot water storage tank communication pipe 3c, the third hot water storage tank 2c, the communication pipe 3b, and the The water storage tank 2b, the communication pipe 3a, and the first hot water storage tank 2a. The low-temperature water that flows out from the bottom of the first hot water storage tank 2a is the first branch pipe 9 on the warm water side, the three-way valve 7, and the inflow pipe 13 flow source machine 1 〇, and is recirculated to the fifth heat after heating. The water storage tank 2e' can store high-temperature water (for example, about 90 ° C water) in the water storage tanks 2a to 2e. At this time, since the water proportional valve 15 is controlled, it is formed with a predetermined amount of hot water. At this time, the first hot water storage tank 2 is a temperature gradient layer at the boundary between the high-temperature water and the low-temperature water after boiling water, and a small amount of hot water is flowed while the gradient layer is not broken, and the hot water is operated while boiling water. Water tank, according to each 10 system. The action diagram is transmitted through the 17 water tank (heat 2d, 2 heat from low heat to make each heat flow into the temperature storage -12- (11) 1377325 pipe 37 return flow to the bathtub 33» Therefore, the above heat exchange function can be utilized The bath that heats the hot water of the bathtub 33 is reheated. When the hot water supply means 34 uses the hot water in the second hot water storage tank 4, the three-way valve 39 is switched, so that the first The high-temperature water on the top side of the hot water storage tank 4 flows from the outflow line 28 to the bypass pipe 40 to be circulated in advance. Therefore, it is possible to instantaneously supply hot water of a predetermined temperature from the hot water supply means 34.
Next, the state in which the priority order is set in accordance with the hot water storage use frequency (use capacity) of the first hot water storage tank 2 and the second hot water storage tank 4 will be described with reference to Figs. 4 and 5 . Fig. 4 is a view showing a state in which the first hot water storage tank 2 is prioritized, and Fig. 5 is a view showing a state in which the second hot water storage tank 4 is prioritized. The term "storage hot water storage time" is, for example, a designated time between 1 pm and 8 pm that can utilize nighttime power. Further, T 1 to T7 shown in the figure indicate the temperature of the hot water detected by each of the temperature sensors T 1 to T7. When the first hot water storage tank 2 is in a priority state (when the hot water supply of the first hot water storage tank 2 is prioritized) First, as shown in Fig. 4, it is first determined whether or not the hot water storage time is stored (S1). In the hot water storage time period, when the heat source unit 10 is stopped (S2), the first hot water storage tank 2 is connected to the first hot water storage tank 2 by the sensor T2 of the second hot water storage tank 2b (the second hot water storage tank 2b) The temperature inside is detected (S3). When T2 is equal to or lower than the specified temperature, the three-way valve 7 and the three-way valve 17 are converted to the priority side setting (S4), and the heat source machine 10-14-(12) 1377325 (S5) is driven (1) The hot water storage tank 2 is heated. The conversion to the priority side setting means that the three-way valve 7 and the three-way valve 17 are switched to the side where the hot water in the first hot water storage tank 2 can be circulated.
When T1 and T2 are at the designated temperature (S7), it is judged whether or not Τ2 of the second hot water storage tank 4 is the lower limit set temperature αΐ (for example, about 5 °C) (S8). The hot water temperature of the first hot water storage tank 2 is detected by the temperature sensors T1 and T2 of the first hot water storage tank 2a and the second hot water storage tank 2b. The position of the downstream side temperature sensors T1 and T2 when the first hot water storage tank 2 is heated can be said to be the temperature gradient layer of the hot water of the first hot water storage tank 2, so that high temperature water of a predetermined temperature can be determined (for example, about 90 ° C) is stored on the upstream side of the temperature sensors T1 and T2 (the fifth hot water storage tank 2e). When it is judged that the hot water temperature of the second hot water storage tank 4 has not reached the lower limit set temperature αΐ, it is converted to the non-priority side setting (S9). Here, the conversion to the non-priority side setting means that the three-way valve 7 and the three-way valve 17 are switched to the side where the hot water in the second hot water storage tank 4 can be circulated. When the second hot water storage tank 4 is heated up, if the enthalpy 2 is determined to be equal to or lower than the predetermined temperature (S1 1 ), the priority is set to the priority side setting (S12), and the first hot water storage tank 2 can be warmed up. S6. The temperature of the hot water in the second hot water storage tank 4 is raised to the upper limit set temperature α 3 (for example, about 60° C.) while the first hot water storage tank 2 is maintained at the predetermined temperature (S13), and then Turn off (OFF) the heat source unit 1 〇 'convert to the priority side setting. In addition to the hot water storage time, the T4 of the 4th hot water storage tank 2d is -15-i (13) 1377325
No. The determination is made for the specified temperature (S15). » When T4 is equal to or lower than the specified temperature, it is converted to the priority side setting (S16), and the first hot water storage tank 2 is heated up to the specified temperature (S17). Here, the purpose of detecting the hot water by the temperature sensor Τ4 of the fourth hot water storage tank 2d is to prevent the hot water of the first hot water storage tank 2 from being cut off. In other words, the hot water supply is used to supply the hot water of the first hot water storage tank 2, and the tap water is supplied to the second water storage tank 2a downstream of the temperature sensor Τ4. In the hot water storage tank 2, the hot water can be prevented from flowing into the fifth hot water storage tank 2e before the high temperature water of the fifth hot water storage tank 2e is used. In addition, when T7 of the second hot water storage tank 4 is equal to or lower than the lower limit set temperature α 1 (S 18), the non-priority side setting (519) is switched to increase the temperature of the second hot water storage tank 4. When the temperature of the second hot water storage tank 4 is raised, if the enthalpy 4 is determined to be equal to or lower than the predetermined temperature (520), it is switched to the priority side setting (S21), and the S 1 that can raise the temperature of the first hot water storage tank 2 is returned. 7. Next, when the crucible 7 of the second hot water storage tank 4 reaches the medium set temperature α2 (for example, 5 5 ° C) or more (S22), if the hot water storage time is exceeded, the heat source unit 10 is turned off (S23), and if The stored hot water time is converted to the priority side setting (S24). In addition, the purpose of setting the T7 of the second hot water storage tank 4 to the medium set temperature α2 is to prepare the reheating of the bathtub 33, and to store the hot water in advance to supply the hot water at the optimum temperature. . Next, the case where the second hot water storage tank 4 is prioritized (the reheating is preferably -16-(14) 1377325 first) will be described.
First, as shown in Fig. 5, it is first determined whether or not the hot water storage time is (S1). During the hot water storage period, T7 of the second hot water storage tank 4 is detected while the heat source unit 10 is stopped (S2), and when T7 is equal to or lower than the lower limit set temperature αΐ, it is converted to the priority side setting (S3), and is driven. (ON) The heat source unit 10 sets the temperature of the crucible 7 to the upper limit set temperature (S4). Here, the conversion to the priority side setting means that the three-way valve 7 and the three-way valve 17 are switched to the side where the hot water in the second hot water storage tank 4 can be circulated. When the enthalpy 2 of the first hot water storage tank 2 is equal to or lower than the predetermined temperature (S5), the non-priority side setting is switched (S6), and the first hot water storage tank 2 is heated. The conversion to the non-priority side setting means that the three-way valve 7 and the three-way valve 17 are switched to the side where the hot water in the first hot water storage tank 2 can be circulated. On the other hand, if S7 exceeds the lower limit set temperature α1 in S2, the process proceeds to S5.
When Τ7 exceeds the lower limit set temperature α 1 (S7), it is judged whether Τ1 and Τ2 are the specified temperatures (S 8 ), and if Τ1 and Τ2 are the specified temperatures, the heat source unit 1 is turned off (OFF) and converted to priority. Side setting. In the case where the T7 of the second hot water storage tank 4 is equal to or lower than the lower limit set temperature αΐ, the priority side setting is switched (S9), and the second hot water storage tank 4 is heated. When the enthalpy 7 of the second hot water storage tank 4 is equal to or lower than the lower limit set temperature α 1 (S 1 1 ) ' is converted to the priority side setting (S12), the 热水 7 of the second hot water storage tank 4 is set. The temperature rise reaches the medium set temperature -17-(15)1377325 α 2 (S13). When T4 of the fourth hot water storage tank 2d is equal to or lower than the predetermined temperature (S14), it is switched to the non-priority side setting (S15), and the first hot water storage tank 2 is heated. When the temperature of the first hot water storage tank 2 is raised, the enthalpy 7 of the second hot water storage tank 4 is equal to or lower than the lower limit set temperature αΐ (S16), and then converted to the priority side setting (S17), and returns to S13 to make the second hot water. The storage tank 4 is warmed up.
When Τ7 exceeds the lower limit set temperature αΐ, the temperature in the first hot water storage tank 2 is raised until Τ2 and Τ4 reach a predetermined temperature (S 18). In the above-described heat pump type hot water supply device, although there is only one heat pump circuit, the hot water storage tank is divided into a plurality of groups, so that the heat of different temperatures can be stored by controlling the three-way valve for each outlet temperature. water. In addition, although there is only one heat pump circuit, it can control the output and storage of hot water stored at different temperatures.
Further, even when the hot water in the second hot water storage tank 4 is used as a heat source to reheat the bathtub 33, the hot water is not returned to the first hot water storage tank 2, so that the first step is not disturbed. 1 The hot water temperature gradient layer in the hot water storage tank 2 does not affect the hot water supply. In addition, since the hot water provided in the first hot water storage tank 2 and the second hot water storage tank 4 is controlled by the temperature sensor provided in the hot water tank, it is possible to sufficiently ensure the inside of each hot water storage tank to be used. The amount of hot water. The present invention is not limited to the above embodiment, and the number or capacity of the water storage tanks of the first hot water storage tank 2 and the second hot water storage tank 4 can be appropriately designed according to the use condition -18-(16) (16) 1377325. Free to change. For example, as shown in Fig. 6, the first hot water storage tank 2 and the second hot water storage tank 4 may be composed of a plurality of water storage tanks 2a, 2b, 4a, and 4b, respectively. In addition, although the second hot water storage tank 4 is exemplified as being used again in the bath, a heat source such as a floor heating may be used. When the floor heating is used, the high-temperature water on the top side of the second hot water storage tank 4 flows from the outflow pipe 28 to the bypass pipe 40 to form a circulation, whereby stable use can be utilized.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an embodiment of a heat pump type hot water supply device of the present invention. Fig. 2 is a schematic view showing an embodiment in which the first hot water storage tank side of Fig. 1 is used. Fig. 3 is a view showing an embodiment using the second hot water storage tank side of Fig. 1
Fig. 4 is a flow chart when the first hot water storage tank is used preferentially. Fig. 5 is a flow chart when the second hot water storage tank is used preferentially. Figure 6 is a schematic diagram showing another embodiment of the present invention. [Main component comparison table] 1: Heat pump hot water supply device 2: First hot water storage tank 4: Second hot water storage tank -19- (17) 1377325 7 : Three-way valve (conversion means) 10: Heat source machine (Heat pump type heating source) 1 1 : Heat exchanger 1 3 : Inflow piping (low temperature water side piping) 1 4 : Outflow piping (high temperature water side piping) 17: Three-way valve (conversion means) 8 : Low temperature water side 2nd branch
9: Low temperature water side 1st branch pipe 1 5 : Water proportional valve (flow adjustment means) 1 8 : High temperature water side 1st branch pipe 1 9 : High temperature water side 2nd branch pipe
-20-

Claims (1)

1377325 卜年Ί月I州修(烫)正换页 The patent application scope of the patent application No. 096101941 is amended on July 12, 101.
1 . A heat pump type hot water supply device, which can connect a first hot water storage tank and a second hot water storage tank to a heat pump type heat source through a circulation line having a low temperature water side pipe and a high temperature water side pipe The low-temperature water discharged from the hot water storage tank is supplied to the heat exchanger of the heat pump type heat source through the low-temperature water side piping, and the high-temperature water heated by the heat exchanger can be passed through the high-temperature water side piping into the hot water storage tank. The heat pump type hot water supply device is characterized in that the high temperature water heated by the heat exchanger is selectively stored in the hot water storage tank by means of a conversion means. 2. A heat pump type hot water supply device, wherein the first hot water storage tank and the second hot water storage tank can be connected to a heat pump type heat source through a circulation line having a low temperature water side pipe and a high temperature water side pipe; The low-temperature water discharged from the hot water storage tank φ is supplied to the heat exchanger of the heat pump type heat source through the low-temperature water side piping, and the high-temperature water heated by the heat exchanger can be passed through the high-temperature water side piping into the hot water storage. The heat pump type hot water supply device of the tank is characterized in that: * the hot water heated by the heat exchanger is selectively stored in the hot water storage tank by means of a conversion means provided in the circulation pipe or the road, and the specified temperature can be obtained. The hot water is separately stored in each of the hot water storage tanks, and the flow rate adjusting means for controlling the flow rate of the hot water flowing through the circulation line is provided in the circulation line. 1377325 I,] monthly repair (3⁄4 positive replacement page 3. The heat pump type hot water supply device according to the first aspect of the invention, wherein the low temperature water side pipe is connected to the first heat through a switching valve The first branch pipe on the low temperature side of the water storage tank is connected to the second branch pipe connected to the low temperature water side of the second hot water storage tank, and the high temperature water side pipe is connected to the first hot water through a switching valve. The first branch pipe on the high temperature water side of the storage tank is connected to the second branch pipe connected to the high temperature water side of the second hot water storage tank. 4. The heat pump type hot water supply device according to claim 2, The low-temperature water side pipe is connected to the low-temperature water side first branch pipe connected to the first hot water storage tank and the low temperature water side second branch pipe connected to the second hot water storage tank through a switching valve. The high-temperature water side piping is connected to the high-temperature water side first branch pipe connected to the first hot water storage tank and the high temperature water side second branch pipe connected to the second hot water storage tank through a switching valve. 5. If you apply for a patent The heat pump type hot water supply device according to the first aspect, wherein the first hot water storage tank is configured such that a plurality of hot water storage tanks are arranged in series through a pipe, and each of the hot water storage tanks is provided for storing heat in each of the hot water storage tanks. The temperature sensor for detecting the temperature of the hot water in the water storage tank stops the hot water storage operation when the preset temperature sensor detects that the hot water is the set temperature. 6. As claimed in item 2 of the patent application scope In the heat pump type hot water supply device described above, the first hot water storage tank is configured such that a plurality of hot water storage tanks are arranged in series through a pipe, and each of the hot water storage tanks is provided in each of the hot water storage tanks. The temperature sensor for detecting the hot water temperature, when the temperature is set to 2-1 1377325, the temperature sensor detects that the hot water is the set temperature, then the hot water is stopped. The heat pump type hot water supply device according to the first aspect of the invention, wherein the second hot water storage tank is provided with a hot water circulation in the second hot water storage tank. Circulation pipeline. 8. If you apply for a patent Item 2 of the heat pump type hot water supply described
In the apparatus, the second hot water storage tank is provided with a circulation line for circulating hot water in the second hot water storage tank. The heat pump type hot water supply device according to claim 1, wherein the second hot water storage tank is configured to return hot water supplied to the external heat exchanger. 10. The heat pump type hot water supply apparatus according to claim 2, wherein the second hot water storage tank is configured to return hot water supplied to the external heat exchanger. A heat pump type hot water supply method, which is a heat pump type hot water supply method using the heat pump type hot water supply device described in claim 2, wherein the first hot water storage tank is used as The hot water storage tank for hot water supply is used, and a small amount of hot water is flown to the heat exchanger and the circulation line to control the boiling water by controlling the flow rate adjusting means, and the second hot water storage tank is used as heat storage. In the layer, a plurality of hot water is supplied to the heat exchanger and the circulation line by controlling the flow rate adjusting means to store hot water having a lower temperature than the first hot water storage tank. 12. The heat pump type hot water supply method according to the first aspect of the invention, wherein the first hot water storage tank is formed to have a boiling water height of 1377325 ι ° 哞1 month, 1 repair (8) positive replacement page temperature a temperature gradient layer of water and non-boiling water at a low temperature water boundary, a plurality of which are arranged to store a small amount of hot water while flowing into the heat exchanger and the circulation line without breaking the temperature gradient layer, with boiling water The temperature sensor that detects the temperature gradient layer of the subsequent high-temperature water storage amount change position stops the boiling water operation when the preset temperature sensor detects the set temperature. The heat pump hot water supply method according to claim 11, wherein the first hot water storage tank is formed as a temperature gradient layer at the boundary between the high temperature water and the non-boiling water low temperature water after the boiling water, In the condition that the temperature gradient layer is not destroyed, a small amount of hot water is stored while being stored in the heat exchanger and the circulation line, and the temperature gradient layer at a position where the high-temperature water storage amount after boiling water is changed is detected. When the temperature sensor that is set in advance detects the set temperature, the boiling water operation is stopped, and the conversion is performed by the above-described conversion means, and the flow rate adjustment valve is controlled to be fully opened in the second hot water storage tank to make a large amount The hot water flows into the heat exchanger and the circulation line, and stores hot water for heat storage. When the sensor provided in the second hot water storage tank detects a predetermined temperature, the hot water storage operation is stopped. The heat pump type hot water supply method according to the first aspect of the invention, wherein the priority use order of the hot water in the first hot water storage tank or the second hot water storage tank is set to 'priority operation Specific formed settings. 1 5 . The hot chest type hot water supply method as described in the scope of the patent application, wherein the heat pump type heating source is a single unit and is not mixed with water ‘ -4- 1377325
β年Ί月 a曰修(more) is replacing the page The hot water outflow and the stored hot water control at the multiple temperatures. -5-
TW096101941A 2006-04-28 2007-01-18 TWI377325B (en)

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JP5103567B2 (en) 2012-12-19
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