JP4912928B2 - Heat pump hot water storage / heating system - Google Patents

Description

  The present invention relates to a heat pump hot water storage type hot water supply / heating device in which hot water in a hot water storage tank is boiled by a heat pump type heating means, and this hot water is used for hot water supply and heating.

Conventionally, this type of heat pump hot water storage type hot water supply and heating device has been proposed as shown in FIG. 24 previously filed by the applicant of the present application (see Patent Document 1). In this heat pump hot water storage type hot water supply and heating device, a hot water storage tank 103 to which a water inlet pipe 101 and a hot water outlet pipe 102 are connected, a heat pump type heating means 104 for heating hot water in the hot water storage tank 103, and hot water in the hot water storage tank 103. A heating heat exchanger 105 for heating the circulating water for heating by using the heat pump, a twenty-first pipe 106 connecting the lower part of the hot water storage tank 103 and the inlet of the heat pump heating means 104, and the twenty-first pipe A circulation pump 107 provided in the middle of the passage 106 for circulating hot water in the lower part of the hot water storage tank 103 to the heat pump heating means 104, and an outlet connecting the outlet of the heat pump heating means 104 and the upper part of the hot water storage tank 103. 22 pipe 108, the middle of the 22nd pipe 108, and the 21st pipe 106 before the circulation pump 107. The heat pump type heating from the 23rd pipeline 110 connecting the hot water storage tank 103 side via the 21st three-way valve 109 provided on the 21st pipeline 106 side and the circulation pump 107 of the 21st pipeline 106. A 24th pipe 112 connecting the means 104 side and the inlet of the heating heat exchanger 105 via a twenty-two-way three-way valve 111; an outlet of the heating heat exchanger 105; and a lower part of the hot water storage tank 103. A 23rd three-way valve is connected between the hot water storage tank 103 side and the middle of the twenty-fourth pipe 112 from the connection point of the twenty-fifth pipe 113 connected to the twenty-third pipe 110 in the middle of the twenty-second pipe 108. 114 and a twenty-sixth pipe line 116 connected via a twenty-fourth three-way valve 115.
Japanese Patent Application No. 2006-167675

  As shown in FIG. 25, this conventional apparatus cannot circulate hot water to the heating heat exchanger 105 during the HP start-up operation from the start of the heat pump heating means 104 to the output stabilization. For example, the amount of stored hot water decreases during the heat storage operation in which heating is performed using the high temperature water in the hot water storage tank 103, and the high temperature water boiled by the heat pump heating means 104 is directly distributed to the heating heat exchanger 105. At the time of switching to the warm operation, it is necessary to stop the heating operation once and wait for the heat pump type heating means 104 to rise before performing the direct warm operation. Therefore, the subject that heating operation stops once occurred.

  In addition, as shown in FIG. 26, during the heat storage operation, since hot water cannot be circulated to the heat pump heating means 104, there is a problem that freezing prevention near the entrance / exit of the heat pump heating means 104 cannot be performed. .

  In order to solve the above-mentioned problems, in the present invention, in claim 1, a hot water storage tank (1) to which a water inlet pipe (6) and a hot water outlet pipe (7) are connected, and hot water in the hot water storage tank (1) are heated. A heat pump heating means (2), a heating heat exchanger (3) for heating the circulating water for heating using hot water in the hot water storage tank (1), a lower portion of the hot water storage tank (1), and the A first pipe (14) connecting the inlet of the heat pump type heating means (2), and hot water in the lower part of the hot water storage tank (1) provided in the middle of the first pipe (14) is heated by the heat pump type heating. A circulation pump (15) that circulates to the means (2), a second pipe (16) that connects the outlet of the heat pump heating means (2) and the upper part of the hot water storage tank (1), and this second pipe The circulation pump (15) in the middle of the path (16) and the first pipe (14) A third pipe (17) connecting the hot water storage tank (1) side via a first three-way valve (18) provided on the first pipe (14) side, and the first pipe ( 14) a fourth line (14) connecting the heat pump type heating means (2) side and the inlet of the heating heat exchanger (3) via the second three-way valve (20) from the circulation pump (15) of 14) 19), a fifth pipe (21) connecting the outlet of the heat exchanger for heating (3) and the lower part of the hot water storage tank (1), and the third pipe in the middle of the second pipe (16). Via the third three-way valve (23) and the fourth three-way valve (24), the hot water storage tank (1) side and the middle of the fourth pipe (19) from the connection point with the pipe (17), respectively. The sixth pipe (22) to be connected and the first pipe (14) of the first pipe (14) through the fifth three-way valve (26) from the middle of the fifth pipe (21). A connection point between the seventh pipe (25) connecting the heat pump heating means (2) side to the three-way valve (20) and the third pipe (17) of the second pipe (16). And an eighth pipe (27) connecting the lower part of the hot water storage tank (1) via the sixth three-way valve (28) from the heat pump heating means (2) side.

  By doing in this way, the circulation pump 15 which circulates the hot water in the hot water storage tank 1 to the heat pump type heating means 2, and the circulation pump 15 which circulates the hot water in the hot water storage tank 1 to the heat exchanger 3 for heating by one unit. In addition to being able to be used together, the high-temperature water boiled by the heat pump heating means 2 from the heat storage operation in which heating is performed using the high-temperature water in the hot water storage tank 1 is directly circulated to the heat exchanger 3 for heating. When switching to the warm operation, the HP start-up operation can be performed without stopping the heating, and the hot water radiated by the heat exchanger 3 for heating during the warm-up operation is circulated to the heat pump heating means 2 Therefore, it is possible to efficiently perform the freeze prevention operation of the heat pump heating means 2 by circulating hot water while performing the heat storage operation.

  Moreover, in Claim 2, in the thing of Claim 1, the said 3rd three-way valve (23) is the ratio of the flow volume to the said hot water storage tank (1) side, and the flow volume to the said 6th pipe line (22) side. The fourth three-way valve (24) is configured so that the sixth pipe (22) and the fourth pipe (19) are connected to the heating heat exchanger (3) side of the fourth three-way valve (24).

  By doing in this way, the hot water storage operation in which the hot water boiled by the heat pump heating means 2 is stored in the hot water storage tank 1 simultaneously with the direct warming operation using the high temperature water boiled by the heat pump heating means 2 for the heating operation. Yes.

  Moreover, in Claim 3, in the thing of Claim 1 or 2, 7th three-way valve (30) from the said hot water storage tank (1) side rather than the said 3rd three-way valve (23) of the said 2nd pipe line (16). It was assumed that a ninth pipe (29) branching through the pipe and connecting to the intermediate part of the hot water storage tank (1) was provided.

  By doing in this way, the intermediate temperature water in the hot water storage tank 1 can be actively used for the heat storage operation or the HP freeze prevention operation in preference to the upper high temperature water, and as a result, the heat pump type It is possible to reduce medium-temperature water having poor heating efficiency in the heating means 2.

  Moreover, in Claim 4, the hot water storage tank (31) to which the water intake pipe (36) and the hot water discharge pipe (37) were connected, the heat pump heating means (32) which heats the hot water in the said hot water storage tank (31), A heating heat exchanger (33) for heating the circulating water for heating using hot water in the hot water storage tank (31), a lower portion of the hot water storage tank (32), and an inlet of the heat pump heating means (32) And a circulation pump provided in the middle of the eleventh pipe (44) for circulating hot water in the lower part of the hot water storage tank (31) to the heat pump heating means (32) ( 45), the twelfth pipe (46) connecting the outlet of the heat pump heating means (32) and the upper part of the hot water storage tank (31), the middle of the twelfth pipe (46), and the heating heat The entrance of the exchanger (33) is the first The 13th pipe line (47) connected via a three-way valve (48), the outlet of the heat exchanger for heating (33), and the hot water storage than the circulation pump (45) of the 11th pipe line (44). 14th pipe line (49) which connects the tank (31) side via a 12th three-way valve (50), and the heat pump heating means rather than the circulation pump (45) of the 11th pipe line (44) A fifteenth pipe (51) for connecting the (32) side and the lower part of the hot water storage tank (31) via a thirteenth three-way valve (52), the middle of the fourteenth pipe (49), and the fifteenth pipe A sixteenth pipe line (53) connecting the middle of the path (51) and the sixteenth pipe line (53), from the heating heat exchanger (33) side to the hot water storage tank (31) side. Flow is allowed and flows from the hot water storage tank (31) side to the heating heat exchanger (33) side A check valve (54) for inhibiting, and a seventeenth pipe (55) connected to the lower part of the hot water storage tank (31) through a fourteenth three-way valve (56) from the middle of the twelfth pipe (46), Was provided.

  By doing in this way, the circulation pump 45 which circulates the hot water in the hot water storage tank 31 to the heat pump type heating means 32, and the circulation pump 45 which circulates the hot water in the hot water storage tank 31 to the heat exchanger 33 for heating by one unit. In addition to being able to be used in combination, the high-temperature water boiled by the heat pump heating means 32 from the heat storage operation in which heating is performed using the high-temperature water in the hot water storage tank 31 is directly distributed to the heat exchanger 33 for heating. At the time of switching to the warm operation, the HP startup operation can be performed without stopping the heating once, and the hot water radiated by the heating heat exchanger 33 during the warm-up operation is circulated to the heat pump heating means 2 Therefore, the freezing prevention operation of the heat pump type heating means 32 by circulating hot water can be performed efficiently while performing the heat storage operation, and the number is small. It is obtained by enabling to function in a three-way valve.

  Moreover, in Claim 5, in the thing of Claim 4, the said 11th three-way valve (48) is the ratio of the flow volume to the said hot water storage tank (31) side, and the flow volume to the said 13th pipe line (47) side. Adjustable distribution valve.

  By doing in this way, the hot water storage operation which stores the hot water boiled by the heat pump heating means 32 in the hot water storage tank 31 simultaneously with the direct warming operation using the high temperature water boiled by the heat pump heating means 32 for the heating operation is performed. Yes.

  Moreover, in Claim 6, in the thing of Claim 5, the said 13th three-way valve (52) adjusts the ratio of the flow volume to the said hot water storage tank (31) side, and the flow volume to the said heat pump type heating means (32). Possible distribution valve.

  In this way, in addition to the high-temperature water boiled by the heat pump heating means 32, the high-temperature water in the hot water storage tank 31 can be combined and circulated to the heating heat exchanger 33. The heating operation can be performed with an output exceeding the output of the heat pump type heating means 32 without reducing the amount of heat in the interior as much as possible, and the heating operation can be performed with a large output while ensuring the function as a hot water supply device.

  Further, in claim 7, in any one of claims 4 to 6, the fifteenth three-way valve from the hot water storage tank (31) side than the eleventh three-way valve (48) of the twelfth pipe (46). An eighteenth pipe line (57) branched from (58) and connected to the intermediate part of the hot water storage tank (31) was provided.

  By doing in this way, the middle temperature water in the hot water storage tank 31 can be actively used for the heat storage operation or the HP freeze prevention operation in preference to the upper high temperature water, and as a result, the heat pump type It is possible to reduce medium-temperature water having poor heating efficiency in the heating means 32.

  According to this invention, it becomes possible to combine a circulation pump for circulating hot water in the hot water storage tank to the heat pump heating means and a circulation pump for circulating hot water in the hot water storage tank to the heat exchanger for heating. At the time of switching from the regenerative operation in which heating is performed using the high-temperature water in the hot water storage tank to the direct warming operation in which the high-temperature water boiled by the heat pump heating means is directly distributed to the heating heat exchanger, heating is performed once. The HP startup operation can be performed without stopping the operation, and further, the hot water radiated by the heat exchanger for heating during the heat storage operation can be circulated to the heat pump heating means. Providing a heat pump hot water storage hot water heater that can efficiently perform freeze prevention operation of heat pump heating means by circulating hot water and can perform various operations It is those that can Rukoto.

Next, a first embodiment of the present invention will be described with reference to FIG.
1 is a hot water storage tank for storing hot water, 2 is a heat pump heating means for heating the hot water in the hot water storage tank 1, and 3 is heating for heating the circulating water for heating on the secondary side using the hot water in the hot water storage tank 1. 4 is a secondary side heating circulation circuit on the secondary side of the heating heat exchanger 3 in which the circulating water for heating is connected to a heating load (not shown) such as a floor heating panel. Is a secondary side heating circulation pump provided in the secondary side heating circulation circuit 4.

  6 is a water inlet pipe for supplying city water to the bottom of the hot water storage tank 1, 7 is a hot water outlet pipe for discharging hot water from the upper part of the hot water storage tank 1, 8 is an intermediate hot water outlet pipe for discharging hot water from the intermediate part of the hot water storage tank 1, 9 An intermediate mixing valve 10 for mixing hot water from the hot water outlet pipe 7 and the intermediate hot water pipe 8 at an appropriate temperature, 10 is an intermediate hot water pipe for supplying hot water from the intermediate mixing valve 9, 11 is a water supply pipe branched from the incoming water pipe 6, and 12 is an intermediate A hot water supply mixing valve 13 for mixing hot water from the hot water supply pipe 10 and city water from the water supply pipe 11 to a set temperature, and 13 is a hot water supply pipe for supplying hot water from the hot water mixing valve 12.

  Reference numeral 14 denotes a first pipe connecting the lower part of the hot water storage tank 1 and the inlet of the heat pump type heating means 2, and 15 denotes a first pipe provided in the middle of the first pipe 14 to distribute hot water from the lower part of the hot water storage tank 1 to the heat pump type heating means 2. The circulation pump 16 is a second pipe connecting the outlet of the heat pump type heating means 2 and the upper part of the hot water storage tank 1, and 17 is the hot water storage tank 1 from the circulation pump 15 in the middle of the second pipe 16 and the first pipe 14. Reference numeral 18 denotes a first three-way valve provided at a connection point between the third pipeline 17 and the first pipeline 14. The first three-way valve 18 selectively connects the c port on the suction side of the circulation pump 15 to either the a port on the third conduit 17 side or the b port on the hot water storage tank 1 side of the first conduit. It is said.

  19 is a fourth pipe connecting the heat pump type heating means 2 side and the inlet of the heat exchanger 3 for heating from the circulation pump 15 of the first pipe 14, and 20 is a first pipe 14 and a fourth pipe 19. It is the 2nd three-way valve provided in the connection point. The second three-way valve 20 selectively selects the c-port on the discharge side of the circulation pump 16 as either the a-port on the heat pump heating means 2 side of the first conduit 14 or the b-port on the fourth conduit 19 side. It is configured to connect.

  21 is a fifth pipe connecting the outlet of the heat exchanger 3 for heating and the lower part (or middle part) of the hot water storage tank 1, and 22 is a connection point with the third pipe 17 in the middle of the second pipe 16. A sixth pipe connecting the hot water storage tank 1 side and the middle of the fourth pipe 19, 23 is a third three-way valve provided at a connection point between the second pipe 16 and the sixth pipe 22, and 24 is a fourth This is a fourth three-way valve provided at the connection point between the pipe line 19 and the sixth pipe line 22. The third three-way valve 23 is either a port on the sixth pipeline 22 side or b port on the hot water storage tank 1 side of the second pipeline 16 or c port on the heat pump heating means 2 side of the second pipeline 16. It is desirable that the distribution valve be configured to be capable of selectively connecting the flow rate of hot water from the c port to the a port and the b port. The fourth three-way valve 24 is configured such that either the a port on the heating heat exchanger 3 side of the fourth pipe line 19 or the b port on the sixth pipe line 22 side is c on the hot water storage tank 1 side of the fourth pipe line 19. A configuration that allows selective connection to the port, and preferably a configuration that allows the a port and the b port to communicate with each other so that hot water can be circulated is desirable.

  25 is a seventh pipe connecting the heat pump type heating means 2 side from the second three-way valve 20 of the first pipe 14 from the middle of the fifth pipe 21, and 26 is a fifth pipe 21 and a seventh pipe 25. It is the 5th three-way valve provided in the connection point. In the fifth three-way valve 26, the c port on the heating heat exchanger 3 side of the fifth pipe 21 is either the a port on the hot water storage tank 1 side of the fifth pipe 21 or the b port on the seventh pipe 25 side. It is configured to selectively connect to one.

  Reference numeral 27 denotes an eighth pipe that branches from the side of the heat pump heating means 2 than the connection point of the second pipe 16 to the third pipe 17 and is connected to the lower part (or the middle part) of the hot water storage tank 1, and 28 is the second one. This is a sixth three-way valve provided at a connection point between the two pipelines 16 and the eighth pipeline 27. In the sixth three-way valve 28, the c port on the heat pump type heating means 2 side of the second pipe line 16 is either the a port on the eighth pipe line 27 side or the b port on the hot water storage tank 1 side of the second pipe line 16. It is set as the structure selectively connected to.

  Reference numeral 29 is a ninth pipe branched from the hot water storage tank 1 side of the second three-way valve 23 from the third three-way valve 23 and connected to an intermediate portion of the hot water storage tank 1, and reference numeral 30 is the second pipe 16 and the ninth pipe 29. Is a seventh three-way valve provided at the connection point. In the seventh three-way valve 30, the c port on the heat pump heating means 2 side of the second pipe line 16 is either the a port on the hot water storage tank 1 side of the second pipe line 16 or the b port on the ninth pipe line 29 side. It is set as the structure selectively connected to.

  Here, the heat pump heating means 2 will be described in detail. A compressor (not shown), a water refrigerant heat exchanger (not shown) as a gas cooler for heating hot water in the hot water storage tank 1, and a decompressor (not shown). 1), an air heat exchanger (not shown) as an evaporator is connected in a ring shape, carbon dioxide is enclosed as a refrigerant, and forms a supercritical vapor compression heat pump cycle that becomes a supercritical state on the high pressure side It is.

Next, the operation of the first embodiment will be described.
FIG. 2 is a diagram for explaining the operation of the heat pump type heating means 2 at the time of start-up (HP start-up operation). The port and the a port communicate with each other, and the sixth three-way valve 28 communicates with the c port and the a port, and the heat pump heating means 2 and the circulation pump 15 are driven to take out from the bottom of the hot water tank 1 The hot and cold water is circulated and heated through the first pipe line 14, the second pipe line 16, and the eighth pipe line 27 and returned to the intermediate portion of the hot water storage tank 1. In this HP startup operation, the heat pump cycle is stabilized after starting the compressor of the heat pump type heating means 2, and the temperature of the hot water actually boiled from the heat pump type heating means 2 rises to a desired temperature. However, it takes about 5 to 10 minutes, but the hot water boiled in the meantime is returned to the lower part (or middle part) of the hot water storage tank 1. By doing in this way, the hot water of a halfway temperature is not supplied to the upper part in the hot water storage tank 1.

  At this time, in order to prevent the hot water unrelated to the operation from circulating, it is desirable to set the three-way valve not related to the operation to an appropriate position. By making the valve 26 communicate with the port b and the port c, and the fourth three-way valve 24 with the port a and the port c, the temperature stratification of the hot water in the hot water storage tank 1 is further disturbed. Can be prevented.

  When the temperature of the heated hot water reaches a desired temperature, the HP startup operation is terminated, and the hot water storage operation shown in FIG. 3 is performed. In this hot water storage operation, from the HP start-up operation state, the sixth three-way valve 28 is communicated with the c port and the b port, the third three way valve 23 is communicated with the c port and the b port, and the seventh three-way valve 30 The c port and the a port communicate with each other. Then, the low-temperature water in the lower part of the hot water storage tank 1 is boiled up to a desired high temperature by the heat pump type heating means 2 by the operation of the circulation pump 15, and the hot water is sequentially stored in a stacked form from the upper part of the hot water storage tank 1.

  This hot water storage operation is performed in the late-night hours (eg, from 23:00 to 7:00 the next morning) when the electricity unit price set by the electric power company is low, and tries to boil the required hot water supply heat amount + heating heat amount the next day To do. Here, the hot water supply heat amount and the heating heat amount are determined by learning control or the like in the past several days.

  When hot water is supplied, as shown in FIG. 4, when a faucet (not shown) at the end of the hot water supply pipe 13 is opened, city water flows into the lower part of the hot water storage tank 1 from the water intake pipe 6. Hot water is discharged from the pipe 7, flows through the intermediate hot water supply pipe 10 through the intermediate mixing valve 9, is mixed with city water from the hot water supply pipe 11 by the hot water supply mixing valve 12, and is adjusted to the set temperature. Out of the faucet through 13. Here, if there is a large amount of hot water stored in the intermediate portion of the hot water storage tank 1, the hot water and hot water are mixed using the intermediate mixing valve 9 or the hot water is discharged as it is. It is desirable to preferentially discharge hot water.

  Next, a case where the heating operation is performed will be described. FIG. 5 is a diagram for explaining a heat storage operation in which heating is performed using high-temperature water in the hot water storage tank 1 boiled in the midnight time zone. The seventh three-way valve 30 is connected to the a port and the c port. The b port and c port communicate with the third three-way valve 23, the a port and c port communicate with the first three-way valve 18, and the c port and b port communicate with the second three-way valve 20. The fourth three-way valve 24 communicates with the c port and the a port, the fifth three-way valve 26 communicates with the c port and the a port, and the circulation pump 15 is driven to drive the hot water storage tank 1 The upper high-temperature water is circulated in the order of the second pipe 16, the third pipe 17, the first pipe 14, the circulation pump 15, the fourth pipe 19, the heating heat exchanger 3, and the fifth pipe 21. Return to the lower part (or middle part) of the hot water storage tank 1 and the heat exchanger 3 for heating. Performing 蓄暖 operation by supplying heat to the secondary side heater circulation circuit 4 follows side.

  At this time, in order to prevent circulating hot water not related to the operation, it is desirable to set a three-way valve not related to the operation to an appropriate position. By making the valve 28 communicate with the c port and the a port, it is possible to prevent the temperature stratification of the hot water in the hot water storage tank 1 from being disturbed excessively.

  When the amount of stored heat in the hot water storage tank 1 detected by hot water storage temperature sensors (not shown) provided on the side surface of the hot water storage tank 1 is less than a predetermined value, the heat pump heating means 2 is activated to boil up. Heating is performed using hot water. At that time, since it takes time to start up the heat pump heating means 2, the warm-up operation + HP start-up operation shown in FIG. 6 is performed until the heat pump cycle starts up. From the state of the heat storage operation, the fifth three-way valve 26 communicates with the c port and the b port, the sixth three-way valve 28 communicates with the c port and the a port, and the heat pump heating means 2 Start up.

  Thereby, the high-temperature water in the upper part of the hot water storage tank 1 is supplied from the second pipe 16, the third pipe 17, the first pipe 14, the circulation pump 15, the fourth pipe 19, the heating heat exchanger 3, and the fifth pipe. After flowing in the order of the passage 21, the seventh conduit 25, the second conduit 16, and the eighth conduit 27, the heat is returned to the lower part (or the middle part) of the hot water storage tank 1 and radiated by the heat exchanger 3 for heating. Since the warm water of the heat pump flows into the heat pump heating means 2 and is boiled up, the heat storage operation and the HP start-up operation are efficient at the same time without lowering the incoming water temperature of the heat pump heating means 2 and causing a high pressure abnormality in the heat pump cycle. It can be done well.

  Then, when the temperature of the hot water boiled by the heat pump heating means 2 reaches a predetermined temperature or more, the warm-up operation + HP start-up operation is terminated, and the hot water boiled by the heat pump heating means 2 as shown in FIG. Is directly distributed to the heat exchanger 3 for heating, and a direct warming operation and a hot water storage operation are performed in which the hot water storage operation is performed.

  In the direct warming operation + hot water storage operation shown in FIG. 7, from the state of the previous warming operation + HP start-up operation, the first three-way valve 18 is connected to the b port and the c port, and the second three-way valve 20 is connected to the c port. The port and the a port communicate with each other, the sixth three-way valve 28 communicates with the c port and the b port, and the third three-way valve 23 is adjusted so that the a port side is 50% and the b port side is 50%. The fourth three-way valve 24 is connected to the b port and the a port, and the fifth three-way valve 26 is connected to the c port and the a port so that the low temperature water in the lower part of the hot water storage tank 1 is circulated in the first pipe 14. It circulates through the pump 15 and is heated to a predetermined high temperature in the heat pump type heating means 2, and the second pipe line 16, the sixth pipe line 22, the fourth pipe line 19, the heating heat exchanger 3, and the fifth pipe line 21. After using it directly as a heat source for heating, On the other hand, the high-temperature water boiled to a predetermined high temperature in the heat pump heating means 2 is partly diverted by the third three-way valve 23 and the second pipe 16 is connected to the hot water storage tank. 1 circulates toward the top of the hot water 1 and is stored in a stacked form from the top of the hot water storage tank 1.

  Here, the third three-way valve 23 is a distribution valve capable of adjusting the ratio of the flow rate on the a port side and the flow rate on the b port side, and heat pump heating means according to the amount of residual heat in the hot water storage tank 1 and the state of the heating load. For example, when the heating load is relatively small and the amount of remaining hot water is small, the flow rate ratio on the b port side of the third three-way valve 23 is increased. While the heat pump type heating means 2 operates at the rated capacity, the heating output can be reduced to increase the amount of heat to be stored, and efficient operation is possible.

  In addition, when the remaining amount of hot water in the hot water storage tank 1 is secured (the amount necessary for hot water supply), the amount of heat is not secured in the hot water storage tank 31 for heating, and the heating load is large. As shown in FIG. 8, only the direct warming operation is performed. Here, the b port of the third three-way valve 23 is fully closed and the a port is fully opened, so that all of the high-temperature water boiled by the heat pump heating means 2 flows to the heating heat exchanger 3. If the heating load decreases and falls below the rated capacity of the heat pump type heating means 2, the b port side of the third three-way valve 23 is opened, and direct heating operation + hot water storage operation is performed as shown in FIG. By doing so, efficient operation can be performed.

  Here, since the heat pump type heating means 2 is arranged so as to be able to exchange heat with the outside air, the hot water circulation circuit to the heat pump type heating means 2 may be frozen. Therefore, in the warm-up operation shown in FIG. 5, the warm-up operation + HP freeze prevention operation shown in FIG. 9 is periodically performed for a fixed time. The warm storage operation + HP freeze prevention operation will be described. From the state of the warm storage operation shown in FIG. 5, the fifth three-way valve 26 is connected to the c port and the b port, and the sixth three way valve 28 is connected to the c port and the a port. , The hot water which has been subjected to heating in the heating heat exchanger 3 and reduced in temperature flows through the fifth pipe 21, the seventh pipe 25 and the first pipe 14 to the heat pump heating means 2. The heat pump heating means 2 and the pipe freezing prevention operation up to the heat pump type heating means 2 by flowing in, flowing through the second pipe line 16 and the eighth pipe line 27 and returning to the lower part (or intermediate part) of the hot water storage tank 1 Is done. Thus, since the heat pump type heating means 2 can be prevented from freezing using the hot water whose temperature has been reduced by exchanging heat in the heating heat exchanger 3, it is possible to return to the heating heat exchanger 3 without stopping the heat storage operation. HP freezing prevention operation can be performed by the amount of residual heat supplied, and the temperature of the hot water returned to the hot water storage tank 1 is lowered, and the temperature of the supplied water to the heat pump heating means 2 can be suppressed in the next hot water storage operation, so that the boiling efficiency is improved. Is.

  Further, the HP freeze prevention operation when the warming-up operation or the direct warming operation is not performed will be described with reference to FIG. 10. The same piping path as the HP start-up operation shown in FIG. The hot water in the lower part of the hot water storage tank 1 is circulated to the heat pump type heating means 2 and returned to the lower part (or the intermediate part) of the hot water storage tank 1 without starting the means 2 so that the heat pump type heating means 2 is regularly operated for a certain time. Freezing prevention is performed.

  Furthermore, as shown in FIG. 11, the HP freeze prevention operation can be performed using medium temperature water in the hot water storage tank 1. The b port and c port are in communication with the seventh three-way valve 30, the a port and c port are in communication with the first three-way valve 18, and the c port and a port are in communication with the second three-way valve 20. The sixth three-way valve 28 communicates with the c port and the a port, and the medium temperature water stored in the intermediate portion of the hot water storage tank 1 is supplied to the ninth pipe line 29, the second pipe line 16, the third pipe line 17, The first pipe 14, the circulation pump 15, the heat pump heating means 2, the second pipe 16, the eighth pipe 27, and the lower part (or middle part) of the hot water storage tank 1 are circulated in this order. While freezing prevention can be performed, the temperature of the medium temperature water in the hot water storage tank 1 is lowered and returned to the hot water storage tank 1, so that the hot water with poor heating efficiency in the heat pump heating means 2 is effectively used during hot water storage operation. The heating efficiency of can also be improved It is.

  At this time, in order to prevent the hot water unrelated to the operation from circulating, it is desirable to set the three-way valve not related to the operation to an appropriate position. By making the valve 26 communicate with the c port and the a port, it becomes possible to prevent the temperature stratification of the hot water in the hot water storage tank 1 from being disturbed excessively.

  As described above, according to the first embodiment of the present invention, the circulation pump 15 that circulates the hot water in the hot water storage tank 1 to the heat pump heating means 2 and the hot water in the hot water storage tank 1 to the heat exchanger 3 for heating are circulated. It is possible to perform various operations such as a hot water storage operation, a warm storage operation, and a direct warm operation by using one circulating pump 15 to be used, and a warm storage operation that performs heating using high-temperature water in the hot water storage tank 1 When switching to the direct warming operation in which the high-temperature water boiled by the heat pump heating means 2 is directly circulated to the heat exchanger 3 for heating, the HP start-up operation can be performed without stopping the heating. Since the hot water radiated by the heating heat exchanger 3 during the heat storage operation can be circulated to the heat pump type heating means 2, the freezing of the heat pump type heating means 2 by circulating hot water while performing the heat storage operation can be performed. It is capable of performing efficient operation.

Next, a second embodiment of the present invention will be described with reference to FIG. A part of the configuration and operation that are almost the same as those of the first embodiment are partially omitted.
31 is a hot water storage tank for storing hot water, 32 is a heat pump heating means for heating the hot water in the hot water storage tank 1, and 33 is heating for heating the circulating water for heating on the secondary side using the hot water in the hot water storage tank 1. A heat exchanger for heat 34, a secondary side heating circulation circuit for the secondary side of the heat exchanger 33 for heating, in which the circulating water for heating is connected to a heating load (not shown) such as a floor heating panel, 35 Is a secondary side heating circulation pump provided in the secondary side heating circulation circuit 4.

  36 is a water intake pipe for supplying city water to the bottom of the hot water storage tank 31, 37 is a hot water discharge pipe for discharging hot water from the upper part of the hot water storage tank 31, 38 is an intermediate hot water discharge pipe for discharging hot water from the intermediate part of the hot water storage tank 31, and 39 is An intermediate mixing valve that mixes hot water from the hot water outlet pipe 37 and the intermediate hot water outlet pipe 38 at an appropriate temperature, 40 is an intermediate hot water pipe that supplies hot water from the intermediate mixing valve 39, 41 is a water supply pipe branched from the water inlet pipe 36, and 42 is intermediate A hot water supply mixing valve 43 for mixing hot water from the hot water supply pipe 40 and city water from the water supply pipe 41 to a set temperature, and 43 is a hot water supply pipe for supplying hot water from the hot water mixing valve 42.

  44 is an eleventh pipe connecting the lower part of the hot water storage tank 31 and the inlet of the heat pump type heating means 32, 45 is provided in the middle of the eleventh pipe 44, and the hot water in the lower part of the hot water storage tank 31 is circulated to the heat pump type heating means 42. A circulation pump 46 for connecting the outlet of the heat pump type heating means 42 and the upper part of the hot water storage tank 32, and 47 for connecting the middle of the twelfth pipe 46 and the inlet of the heat exchanger 33 for heating. Reference numerals 13 and 48 denote an eleventh three-way valve provided at a connection point between the twelfth pipe 46 and the thirteenth pipe 47. The eleventh three-way valve 48 is either an a port on the thirteenth conduit 47 side or a b port on the hot water storage tank 31 side of the twelfth conduit 46, or a c port on the heat pump heating means 32 side of the twelfth conduit 46. It is desirable that the distribution valve be configured to be capable of selectively connecting the flow rate of hot water from the c port to the a port and the b port.

  49 is a fourteenth pipe connecting the outlet of the heat exchanger 33 for heating and the hot water storage tank 31 side of the circulation pump 45 of the eleventh pipe 44, and 50 is a connection between the fourteenth pipe 49 and the eleventh pipe 44. This is a twelfth three-way valve provided at the connection point. In the twelfth three-way valve 50, either the a port on the 14th pipe line 49 side or the b port on the hot water storage tank 31 side of the eleventh pipe line 44 is connected to the c port on the suction side of the circulation pump 45 of the eleventh pipe line 44. To be selectively connectable.

  51 is a fifteenth pipe connecting the heat pump type heating means 32 side to the lower part of the hot water storage tank 31 with respect to the circulation pump 45 of the eleventh pipe 44, and 52 is a connection between the fifteenth pipe 51 and the eleventh pipe 44. This is a thirteenth three-way valve provided at the point. In the thirteenth three-way valve 52, either the a port on the fifteenth pipe 51 side or the b port on the heat pump heating means 42 side of the eleventh pipe 44 is connected to the discharge side of the circulation pump 45 of the eleventh pipe 44. It is configured to be selectively connectable to the c port.

  53 is a sixteenth pipe connecting the middle of the fourteenth pipe 49 and the middle of the fifteenth pipe 51, and 54 is provided in the sixteenth pipe 53, and flows from the heating heat exchanger 33 side to the hot water storage tank 31 side. This check valve inhibits the flow from the hot water storage tank 31 side to the heating heat exchanger 33 side.

  55 is a seventeenth pipe connected from the middle of the twelfth pipe 46 to the lower part of the hot water storage tank 31, and 56 is a fourteenth three-way valve provided at a connection point between the twelfth pipe and the seventeenth pipe. In the fourteenth three-way valve 56, either the a port on the hot water storage tank 32 side or the b port on the seventeenth pipeline 55 side of the twelfth pipeline 46 is connected to the c port on the heat pump heating means 42 side of the twelfth pipeline 46. To be selectively connectable. In addition, it is desirable that the seventeenth pipe line 55 has a configuration partially shared with the water inlet pipe 36.

  57 is an eighteenth pipe connected to the intermediate portion of the hot water storage tank 31 from the eleventh three-way valve 48 of the twelfth pipe 46 and 58 is connected to an intermediate portion of the hot water storage tank 31, and 58 is a twelfth pipe 46 and an eighteenth pipe 57. 15 is a 15-way three-way valve provided at the connection point. In the fifteenth three-way valve 58, the c port on the heat pump type heating means 32 side of the twelfth pipe 46 is either the a port on the hot water storage tank 31 side of the twelfth pipe 46 or the b port on the eighteenth pipe 57 side. It is set as the structure selectively connected to.

Next, the operation of the second embodiment will be described.
FIG. 13 is a diagram for explaining the operation of the heat pump type heating means 32 at the time of start-up (HP start-up operation). The hot water extracted from the hot water storage tank 31 is configured such that the port and the b port communicate with each other, the c port and the b port communicate with the fourteenth three-way valve 56, and the heat pump heating means 32 and the circulation pump 45 are driven. Is circulated and heated through the eleventh pipe 44 and returned to the lower part of the hot water storage tank 31 through the twelfth pipe 46 and the seventeenth pipe 55. During this HP startup operation, the heat pump cycle is stabilized after the compressor of the heat pump heating means 32 is started, and the temperature of the hot water actually boiled from the heat pump heating means 32 rises to a desired temperature. However, it takes about 5 to 10 minutes, and the hot water boiled in the meantime is returned to the lower part of the hot water storage tank 1. By doing so, hot water having a halfway temperature is not supplied to the upper part of the hot water storage tank 31.

  When the temperature of the heated hot water reaches a desired temperature, the HP startup operation is terminated, and the hot water storage operation shown in FIG. 14 is performed. In this hot water storage operation, the 14th three-way valve 56 is made to communicate with the c port and the a port, the eleventh three-way valve 48 is made to communicate with the c port and the b port, and the fifteenth three-way valve 58 is started. The c port and the a port communicate with each other. Then, the low-temperature water in the lower part of the hot water storage tank 1 is boiled up to a desired high temperature by the heat pump type heating means 32 by the operation of the circulation pump 45, and the hot water is sequentially stored in a stacked form from the upper part of the hot water storage tank 31.

  Next, a case where the heating operation is performed will be described. FIG. 15 is a diagram for explaining a heat storage operation in which heating is performed using high-temperature water in the hot water storage tank 31 boiled in the midnight time zone. The 15th three-way valve 58 is connected to the a port and the c port. The eleventh three-way valve 48 communicates with the port b and the port c, the twelfth three-way valve 50 communicates with the port a and the port c, and the thirteenth three-way valve 52 communicates with the port c and the port a. At the same time, the circulation pump 45 is driven, and the hot water in the upper part of the hot water storage tank 31 is supplied to the twelfth conduit 46, the thirteenth conduit 47, the fourteenth conduit 49, the eleventh conduit 44, the circulation pump 45, the first 15 pipes 51 are circulated in this order and returned to the lower part (or intermediate part) of the hot water storage tank 31, and heat is supplied by supplying heat to the secondary side heating circulation circuit 34 on the secondary side of the heating heat exchanger 33. Do the driving.

  At this time, the 14th three-way valve 56 is closed at the a port side so that the b port and the c port communicate with each other, thereby preventing unnecessary warm water from circulating. Is provided with a check valve 54, so that the flow through the sixteenth pipe line 53 from the discharge side of the circulation pump 45 to the suction side is blocked, and unnecessary hot water circulation is prevented, which is efficient. It is possible to perform a heat storage operation.

  Further, in order to prevent the hot water unrelated to the operation from circulating, it is desirable to set the three-way valve not related to the operation at an appropriate position. By allowing the c port and the b port to communicate with each other, it is possible to prevent the temperature stratification state of the hot water in the hot water storage tank 1 from being disturbed excessively.

  When the amount of stored heat in the hot water storage tank 31 detected by hot water storage temperature sensors (not shown) provided on the side surface of the hot water storage tank 31 is less than a predetermined value, the heat pump heating means 32 is activated to boil up. Heating is performed using hot water. At that time, since it takes time to start up the heat pump heating means 32, the warm-up operation + HP startup operation shown in FIG. 16 is performed until the heat pump cycle starts up. From the state of the heat storage operation, the c port and the b port are communicated with the thirteenth three-way valve 52, the c port and the b port are communicated with the fourteenth three-way valve 56, and the heat pump heating means 32 is provided. Start up.

  As a result, the hot water in the upper part of the hot water storage tank 31 is supplied from the twelfth pipe 46, the thirteenth pipe 47, the heating heat exchanger 33, the fourteenth pipe 49, the circulation pump 45, the eleventh pipe 44, and the heat pump heating. The hot water after flowing in the order of the means 32, the twelfth conduit 46, and the seventeenth conduit 55 is returned to the lower part (or intermediate part) of the hot water storage tank 31 and radiated by the heat exchanger 33 for heating is heated by a heat pump. Since it flows into the means 32 and is boiled up, it is possible to efficiently perform the heat storage operation and the HP start-up operation at the same time without lowering the incoming water temperature of the heat pump type heating means 32 and causing a high pressure abnormality of the heat pump cycle. Become.

  Then, when the temperature of the hot water boiled by the heat pump heating means 32 reaches a predetermined temperature or more, the warm-up operation + HP start-up operation is terminated, and the hot water boiled by the heat pump heating means 32 as shown in FIG. Is directly distributed to the heat exchanger 33 for heating, and a direct warming operation and a hot water storage operation are performed in which the hot water storage operation is performed.

  In the direct warming operation + hot water storage operation shown in FIG. 17, from the state of the previous warming operation + HP startup operation, the 12th three-way valve 50 is made to communicate with the b port and the c port, and the 14th three way valve 56 is set to c. The low temperature water in the lower part of the hot water storage tank 1 is circulated through the eleventh pipe 44 and the circulation pump 45 so that the heat pump type heating means 32 is heated to a predetermined high temperature. The thirteenth pipe 47, the heating heat exchanger 33, the fourteenth pipe 49, the sixteenth pipe 53, and the fifteenth pipe 51 are used directly as a heat source for heating in this order, and then the lower part (or middle) of the hot water storage tank 31. The high-temperature water boiled to a predetermined high temperature in the heat pump heating means 32 is partly diverted by the eleventh three-way valve 48 and the eleventh pipe 46 is connected to the upper part of the hot water storage tank 31. Flow towards And, it is the hot water storage in layers from the top of the hot water storage tank 31.

  Here, the eleventh three-way valve 48 is a distribution valve capable of adjusting the ratio of the flow rate on the a port side and the flow rate on the b port side, and heat pump heating means according to the amount of residual heat in the hot water storage tank 31 and the state of the heating load For example, when the heating load is relatively small and the amount of remaining hot water is small, the flow rate ratio on the b port side of the eleventh three-way valve 48 is increased. While the heat pump type heating means 32 operates at the rated capacity, the heating output can be reduced to increase the amount of heat to be stored, and an efficient operation is possible.

  In addition, when the remaining amount of hot water in the hot water storage tank 31 is ensured (the amount necessary for hot water supply), the amount of heat is not secured in the hot water storage tank 31 for heating, and the heating load is large. As shown in FIG. 18, only the direct warming operation is performed. Here, the b port of the eleventh three-way valve 48 is fully closed and the a port is fully opened, so that all of the high-temperature water boiled by the heat pump heating means 32 flows to the heating heat exchanger 33. If the heating load decreases and falls below the rated capacity of the heat pump type heating means 32, the b port side of the eleventh three-way valve 48 is opened, and direct warming operation + hot water storage operation is performed as shown in FIG. By doing so, efficient operation can be performed.

  Here, since the heat pump heating means 32 is arranged so as to be able to exchange heat with the outside air, the hot water circulation circuit to the heat pump heating means 32 may freeze. Therefore, in the warm-up operation shown in FIG. 15, the warm-up operation + HP freeze prevention operation shown in FIG. 19 is periodically performed for a certain period of time. The warm storage operation + HP freeze prevention operation will be described. From the state of the warm storage operation shown in FIG. 15, the thirteenth three-way valve 52 is connected to the c port and the b port, and the fourteenth three way valve 56 is connected to the c port and the b port. The hot water which has been subjected to heating in the heating heat exchanger 3 and reduced in temperature flows through the fourteenth pipe line 49 and the eleventh pipe line 44 and flows into the heat pump heating means 32, and the twelfth pipe. By passing through the passage 46 and the seventeenth pipeline 55 and returning to the lower part (or the middle part) of the hot water storage tank 1, the heat pump heating means 32 and the pipe freezing prevention operation up to the heat pump heating means 32 are performed. Thus, since the heat pump type heating means 32 can be prevented from freezing using the hot water whose temperature has been lowered by exchanging heat in the heating heat exchanger 33, the warming operation is not stopped, and the heating heat exchanger 33 is also stopped. HP freezing prevention operation can be performed by the amount of residual heat supplied, and the temperature of the hot water returned to the hot water storage tank 31 is lowered, and the temperature of the water supplied to the heat pump heating means 32 can be suppressed in the next hot water storage operation, so that the boiling efficiency is also improved. Is.

  Further, the HP freezing prevention operation when the warming-up operation or the direct warming operation is not performed will be described based on FIG. 20. The same piping path as the HP start-up operation shown in FIG. The hot water in the lower part of the hot water storage tank 31 is circulated to the heat pump type heating means 32 and returned to the lower part (or intermediate part) of the hot water storage tank 31 in a state where the means 32 is not activated, so Freezing prevention is performed.

  Furthermore, as shown in FIG. 21, the HP freeze prevention operation can be performed using medium temperature water in the hot water storage tank 31. The fifteenth three-way valve 58 is connected to the b port and the c port, the eleventh three-way valve 48 is connected to the b port and the a port, and the twelfth three-way valve 50 is connected to the a port and the c port. The thirteenth three-way valve 52 communicates with the c port and the b port, the fourteenth three way valve 56 communicates with the c port and the b port, and the medium-temperature water stored in the intermediate portion of the hot water storage tank 31 is 18 pipe 57, 12 th pipe 46, 13 th pipe 47, 11 th pipe 44, circulation pump 45, heat pump heating means 32, 12 th pipe 46, 17 th pipe 55, lower part of hot water storage tank 31 The heat pump heating means 32 can be prevented from freezing and the medium temperature water in the hot water storage tank 31 is lowered in temperature and returned to the hot water storage tank 31. Among by effectively utilizing the hot water poor heating efficiency at the time of the hot water storage operation with even those that can be improved.

  Here, another embodiment of the direct warming operation in the second embodiment will be described with reference to FIG. In the direct warming operation shown in FIG. 17 or 18, the hot water radiated by the heating heat exchanger 33 is returned to the lower part (or the middle part) of the hot water storage tank 31, and the heat pump type heating means 32 lowers the hot water storage tank 31. Although the hot water flowing out from the heater is heated, the hot water radiated by the heating heat exchanger 33 is directly circulated to the heat pump heating means 32 and heated as in another form of the direct warming operation shown in FIG. It is also possible to do so. Here, the thirteenth three-way valve 52 communicates with the c port and the b port, the fourteenth three way valve 56 communicates with the c port and the a port, and the eleventh three-way valve 48 communicates with the c port and the a port. The a port and the c port are communicated with each other in the twelfth three-way valve 50, and the circulation pump 45 is driven so that the circulation pump 45, the eleventh pipe 44, the heat pump heating means 32, and the twelfth pipe. The direct heating operation is performed by circulating heating in the order of the passage 46, the thirteenth conduit 47, the heating heat exchanger 33, the fourteenth conduit 49, and the circulation pump 45.

Next, a third embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol was attached | subjected about the thing with a structure and operation | movement almost the same as previous 2nd Embodiment, and the description was abbreviate | omitted.
In the third embodiment, the thirteenth three-way valve 52 is a distribution valve configured to distribute the flow rate of hot water from the c port at a ratio that is arbitrarily adjusted to the a port and the b port. In addition, it is possible to perform a direct warming operation simultaneously with a heat storage operation. At the start of the heating operation, the heating load is large because the house to be heated is cold. Here, the amount of heat stored in the hot water storage tank 31 is not sufficient, and if the heat storage operation is performed with a large heating output, the amount of heat for hot water supply cannot be secured.

  Accordingly, as shown in FIG. 23, the 15th three-way valve 58 communicates with the a port and the c port, and the eleventh three-way valve 48 communicates with the a port, the b port, and the c port. The valve 50 is connected to the a port and the c port, the thirteenth three-way valve 52 is connected to the a port, the b port, and the c port, and the fourteenth three-way valve 56 is connected to the c port and the a port. At the same time, by driving the circulation pump 45 and the heat pump type heating means 32, it is possible to use both the warm-up operation and the direct warming operation.

  The high-temperature water flowing out from the upper part of the hot water storage tank 31 circulates in the order of the twelfth conduit 46, the thirteenth conduit 47, the heat exchanger 33 for heating, the fourteenth conduit 49, the eleventh conduit 44, and the circulation pump 45. To do. The high-temperature water heated by the heat pump heating means 32 is supplied from the twelfth conduit 46, the thirteenth conduit 47, the heating heat exchanger 33, the fourteenth conduit 49, the eleventh conduit 44, and the circulation pump 45. Circulate in order. The hot water discharged from the circulation pump 45 is diverted by the thirteenth three-way valve 52 into the fifteenth pipe 51 on the hot water storage tank 31 side and the eleventh pipe 44 on the heat pump heating means 32 side. It is circulated to the lower part and the heat pump type heating means 32.

  In this way, the heating operation can be performed with an output exceeding the output of the heat pump heating means 32 without reducing the amount of heat in the hot water storage tank 31 as much as possible, and the heating operation can be performed with a large output while ensuring the function as a hot water supply device. Is something that can be done.

  As described above, according to the second and third embodiments of the present invention, the circulation pump 45 that circulates the hot water in the hot water storage tank 31 to the heat pump heating means 32 and the hot water storage tank to the heat exchanger 33 for heating. It is possible to perform various operations such as hot water storage operation, heat storage operation, and direct warming operation by using a single circulation pump 45 that circulates hot water in the water tank 31, and using hot water in the hot water storage tank 31. When switching from a warm-up operation for heating to a direct-warm operation in which high-temperature water boiled by the heat pump type heating means 32 is directly passed to the heat exchanger 33 for heating, the HP startup operation is performed without stopping heating once. Furthermore, since the hot water radiated by the heating heat exchanger 33 during the heat storage operation can be circulated to the heat pump type heating means 32, the hot water is circulated while performing the heat storage operation. It is capable of performing freeze prevention operation of the heat pump type heating unit 32 efficiently. Further, compared to the first embodiment, the number of three-way valves and pipes can be reduced, and various operations can be realized at low cost.

1 is a system diagram of a first embodiment of the present invention. Explanatory drawing of HP starting operation of 1st Embodiment. Explanatory drawing of the hot water storage driving | operation of 1st Embodiment. Explanatory drawing of the hot water supply driving | operation of 1st Embodiment. Explanatory drawing of the thermal storage driving | operation of 1st Embodiment. Explanatory drawing of warm-up operation + HP start-up operation of 1st Embodiment. Explanatory drawing of the direct warming operation | movement + hot water storage operation of 1st Embodiment. Explanatory drawing of the direct warming driving | operation of 1st Embodiment. Explanatory drawing of the thermal storage driving | operation + HP freezing prevention driving | operation of 1st Embodiment. Explanatory drawing of HP freezing prevention driving | operation of 1st Embodiment. Explanatory drawing of the other form of HP freezing prevention driving | operation of 1st Embodiment. The system figure of 2nd Embodiment of this invention. Explanatory drawing of HP starting operation of 2nd Embodiment. Explanatory drawing of the hot water storage driving | operation of 2nd Embodiment. Explanatory drawing of the thermal storage driving | operation of 2nd Embodiment. Explanatory drawing of warm-up operation + HP start-up operation of 2nd Embodiment. Explanatory drawing of the direct warming operation + hot water storage operation of 2nd Embodiment. Explanatory drawing of the direct warming driving | operation of 2nd Embodiment. Explanatory drawing of the thermal storage driving | operation + HP freezing prevention driving | operation of 2nd Embodiment. Explanatory drawing of HP freezing prevention operation of 2nd Embodiment. Explanatory drawing of the other form of HP freezing prevention driving | operation of 2nd Embodiment. Explanatory drawing of the other form of the direct warming driving | operation of 2nd Embodiment. Explanatory drawing of the thermal storage driving | operation + direct warming driving | operation of 3rd Embodiment of this invention. The system diagram of the conventional heat pump hot water storage type hot water supply and heating apparatus. Explanatory drawing of the conventional HP start-up operation. Explanatory drawing of the conventional heat storage driving | operation.

Explanation of symbols

First Embodiment 1 Hot Water Storage Tank 2 Heat Pump Heating Means 3 Heating Heat Exchanger 6 Inlet Pipe 7 Outlet Pipe 14 First Pipe Line 15 Circulation Pump 16 Second Pipe Line 17 Third Pipe Line 18 First Three-way Valve 19 Fourth Pipe line 20 2nd 3 way valve 21 5th line 22 6th line 23 3rd way valve (distribution valve)
24 4th 3 way valve 25 7th line 26 5th 3 way valve 27 8th line 28 6th 3 way valve 29 9th line 30 7th 3 way valve 2nd embodiment, 3rd embodiment 31 Hot water storage tank 32 Heat pump type Heating means 33 Heating heat exchanger 36 Water inlet pipe 37 Hot water outlet pipe 44 11th pipe 45 Circulation pump 46 12th pipe 47 13th pipe 48 11th three-way valve (distribution valve)
49 14th line 50 12th three-way valve 51 15th line 52 13th three-way valve (distribution valve)
53 16th pipeline 54 Check valve 55 17th pipeline 56 14th three-way valve 57 18th pipeline 58 15th threeway valve

Claims (7)

A hot water storage tank (1) to which a water inlet pipe (6) and a hot water outlet pipe (7) are connected;
A heat pump heating means (2) for heating hot water in the hot water storage tank (1);
A heating heat exchanger (3) for heating the circulating water for heating using hot water in the hot water storage tank (1);
A first pipe (14) connecting the lower part of the hot water storage tank (1) and the inlet of the heat pump heating means (2);
A circulation pump (15) provided in the middle of the first pipe (14), for circulating hot water in the lower part of the hot water storage tank (1) to the heat pump heating means (2);
A second pipe (16) connecting the outlet of the heat pump heating means (2) and the upper part of the hot water storage tank (1);
The first pipe (14) is provided in the middle of the second pipe (16) and the hot water storage tank (1) side from the circulation pump (15) of the first pipe (14) on the first pipe (14) side. A third line (17) connected via a three-way valve (18);
The heat pump type heating means (2) side and the inlet of the heating heat exchanger (3) are connected via the second three-way valve (20) from the circulation pump (15) of the first pipe line (14). A fourth conduit (19) to
A fifth pipe (21) connecting the outlet of the heating heat exchanger (3) and the lower part of the hot water storage tank (1);
A third three-way valve (1) is provided between the hot water storage tank (1) side and the middle of the fourth pipe (19) from the connection point with the third pipe (17) in the middle of the second pipe (16). 23) and a sixth line (22) connected via a fourth three-way valve (24);
From the middle of the fifth pipe (21) through the fifth three-way valve (26), the heat pump heating means (2) side of the first pipe (14) rather than the second three-way valve (20). A seventh pipe line (25) to be connected;
The hot water storage tank (1) is connected to the third pipe (17) of the second pipe (16) from the side of the heat pump heating means (2) through the sixth three-way valve (28). An eighth pipe (27) connecting the lower part;
A heat pump hot water storage type hot water supply and heating device.   The third three-way valve (23) is a distribution valve capable of adjusting a ratio of a flow rate to the hot water storage tank (1) side and a flow rate to the sixth pipe line (22) side, and the fourth three-way valve (24 The heat pump hot water storage type hot water supply and heating device according to claim 1, wherein the sixth pipe (22) and the fourth pipe (19) communicate with the heating heat exchanger (3) side.   Branching from the hot water storage tank (1) side through the seventh three-way valve (30) to the intermediate portion of the hot water storage tank (1) from the third three-way valve (23) of the second pipe (16). The heat pump hot water storage type hot-water supply / heating device according to claim 1 or 2, further comprising a ninth pipe (29) to be connected. A hot water storage tank (31) to which a water inlet pipe (36) and a hot water outlet pipe (37) are connected;
A heat pump heating means (32) for heating hot water in the hot water storage tank (31);
A heating heat exchanger (33) for heating the circulating water for heating using hot water in the hot water storage tank (31);
An eleventh pipe line (44) connecting the lower part of the hot water storage tank (32) and the inlet of the heat pump heating means (32);
A circulation pump (45) provided in the middle of the eleventh pipe (44), for circulating hot water in the lower part of the hot water storage tank (31) to the heat pump heating means (32);
A twelfth pipe (46) connecting the outlet of the heat pump heating means (32) and the upper part of the hot water storage tank (31);
A thirteenth pipe (47) connecting the middle of the twelfth pipe (46) and the inlet of the heat exchanger (33) for heating via an eleventh three-way valve (48);
The outlet of the heating heat exchanger (33) is connected to the hot water storage tank (31) side of the eleventh pipe (44) from the circulation pump (45) via a twelfth three-way valve (50). A fourteenth conduit (49);
A heat pump type heating means (32) side of the eleventh pipe line (44) is connected to the lower part of the hot water storage tank (31) through a thirteenth three-way valve (52). 15 pipelines (51),
A sixteenth pipe line (53) connecting the middle of the fourteenth pipe line (49) and the middle of the fifteenth pipe line (51);
This 16th pipe line (53) is allowed to flow from the heating heat exchanger (33) side to the hot water storage tank (31) side, and the heating heat exchange from the hot water storage tank (31) side. A check valve (54) that obstructs the flow to the vessel (33) side;
A heat pump hot water storage system comprising a seventeenth pipe (55) connected to the lower part of the hot water storage tank (31) through a fourteenth three-way valve (56) from the middle of the twelfth pipe (46). Hot water heater.   The eleventh three-way valve (48) is a distribution valve capable of adjusting a ratio of a flow rate to the hot water storage tank (31) side and a flow rate to the thirteenth pipe line (47) side. 4. The heat pump hot water storage type hot water supply and heating device according to 4.   The thirteenth three-way valve (52) is a distribution valve capable of adjusting a ratio of a flow rate to the hot water storage tank (31) side and a flow rate to the heat pump heating means (32). The heat pump hot water storage type hot water supply and heating device described.   Branches from the hot water storage tank (31) side through the fifteenth three-way valve (58) to the intermediate portion of the hot water storage tank (31) from the eleventh three-way valve (48) of the twelfth pipe (46). The heat pump hot water storage type hot water supply and heating device according to any one of claims 4 to 6, further comprising an 18th pipe line (57) to be connected.

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