JP5060320B2 - Water heater - Google Patents

Description

  The present invention relates to a hot water supply apparatus that supplies hot water from a hot water storage tank.

  Conventionally, a hot water supply apparatus having a hot water storage tank is known. For example, Patent Document 1 discloses a hot water supply apparatus 200 as shown in FIG. The hot water supply apparatus 200 includes a hot water storage tank unit 101 having a hot water storage tank 102 to which water is supplied to a lower portion from a water supply pipe 109, and a heat pump unit 103 as a heating body for heating water in the hot water storage tank 102. The heat pump unit 103 has a refrigerant circuit 130 in which a compressor 131, a high-pressure side heat exchanger 132, an expansion valve 133, and a low-pressure side heat exchanger 134 are sequentially connected. The hot water storage tank 102 and the high pressure side heat exchanger 132 of the heat pump unit 103 are connected in a loop by a water supply pipe 110 and a hot water supply pipe 111. A pump 135 is provided in the middle of the water supply pipe 110. And by operation | movement of the pump 135, the water in the hot water storage tank 102 is extracted from the lower part through the water pipe 110, is sent to the high voltage | pressure side heat exchanger 132, and is heated here and becomes hot hot water. The generated hot water is returned to the upper part of the hot water storage tank 102 via the hot water supply pipe 111. In this way, hot water is stored in the hot water storage tank 102 from above.

  The hot water storage tank 102 is connected to a hot water supply terminal 104 such as a faucet or a shower and a bathtub 106 by piping. When hot water stored in the hot water storage tank 102 is used at the hot water supply terminal 104, the hot water passes through the hot water supply pipe 108, the intermediate mixing valve 114, the relay pipe 115, the terminal mixing valve 116, and the first hot water supply pipe 117. Then, it is supplied from the upper part of the hot water storage tank 102 to the hot water supply terminal 104. Hot water supplied to the hot water supply terminal 104 is mixed with water from the water supply pipe 109 so as to reach a predetermined terminal hot water supply temperature at the terminal mixing valve 116. The terminal hot-water supply temperature can be set to a desired temperature by the user using the kitchen remote controller 105 installed in the kitchen or the bathroom or the bath remote controller 107 installed in the bathroom.

  On the other hand, when hot water stored in the hot water storage tank 102 is used to fill the bathtub 106 with hot water, the hot water is used as the tapping pipe 108, the intermediate mixing valve 114, the relay pipe 115, the bath mixing valve 118, the second hot water supply. It is supplied to the bathtub 106 from the upper part of the hot water storage tank 102 via the pipe 119. The hot water supplied to the bathtub 106 is mixed with water from the water supply pipe 109 so as to reach a predetermined bath hot water supply temperature by the bath mixing valve 118. The bath water supply temperature can be set to a desired temperature by the user using the bath remote controller 107.

Furthermore, the hot water supply apparatus 200 can perform a reheating operation in which the hot water in the bathtub 106 is heated again using the hot water in the hot water storage tank 102. That is, the hot water supply apparatus 200 includes a bath heat exchanger 120 that exchanges heat between hot water stored in the upper side of the hot water storage tank 102 and hot water in the bathtub 106.
JP-A-2005-274132

  If the hot water supply apparatus 200 as shown in FIG. 5 can be shared by a plurality of households residing in a two-family house or an apartment house, the equipment cost can be greatly reduced. However, the conventional hot water supply device is not intended to be shared by a plurality of households.

  Therefore, the present inventors have devised a hot water supply apparatus for a plurality of households suitable for sharing by a plurality of households. In this hot water supply apparatus, there are provided a plurality of terminal hot water supply paths and bath hot water supply paths that guide hot water stored in a hot water storage tank to each of a plurality of households and supply the hot water supply terminals and bathtubs of each household. Each terminal hot water supply path is provided with a mixing valve that mixes hot water from the hot water storage tank with water so as to reach a predetermined terminal hot water supply temperature, and each bath hot water supply path supplies hot water from the hot water storage tank to a predetermined temperature. A mixing valve is provided for mixing with water so that the bath hot water temperature is reached. An operation terminal is provided for each household, and in each operation terminal, the terminal hot water temperature and the bath hot water temperature in the corresponding household can be set independently.

  By the way, the expense concerning the operation of the hot water supply apparatus for a plurality of households can be grasped from the amount of energy (for example, electric power) supplied to the hot water supply apparatus. However, in a hot water supply system for multiple households, the hot water for multiple households will be boiled together, so knowing how much energy each household needed from the amount of energy supplied to the hot water supply system I can't. There is also the problem of how to think about energy loss. Therefore, in order to clarify the cost burden in each household, it is desirable to make it possible to know what ratio each household has used energy.

  In view of such circumstances, an object of the present invention is to provide a hot water supply apparatus that is suitable for sharing by a plurality of households and that can know the energy usage ratio of each household.

  In order to achieve the above-mentioned object, the present invention is a hot water supply apparatus for a plurality of households, in which a hot water storage tank to which water is supplied from a water supply pipe to the lower part and water extracted from the lower part of the hot water storage tank are heated. Hot water generation means for returning the hot water to the upper part of the hot water storage tank, and a plurality of terminal hot water supply paths for supplying the hot water stored in the hot water storage tank to each of the households and supplying them to the hot water supply terminals of each household. In each case, the hot water from the hot water storage tank is stored in the hot water storage tank, and a terminal hot water passage provided with a terminal mixing valve for mixing the hot water from the hot water supply pipe with the water from the water supply pipe so as to have a predetermined terminal hot water supply temperature. There are a plurality of bath hot water supply paths that guide hot water to each of the households and supply the hot water from the hot water storage tank to each bath. Bath mixing valve for mixing A bath hot water supply path, an operation terminal that is provided for each household and can independently set the terminal hot water temperature and the bath hot water temperature in the corresponding household, the hot water generating means, the terminal mixing valve, And a control means for controlling the bath mixing valve, a terminal hot water supply calorie measuring means for measuring the amount of hot water supplied to the hot water supply terminal, and a hot water supply heat used for hot water supply to the bathtub. The amount of heat used by each household is calculated by adding the amount of heat supplied to the hot water supplied from the terminal and the amount of heat supplied to the hot water measured by the means for measuring the amount of hot water supplied from the bath to each household. A hot water supply device is provided, comprising:

  According to said structure, the hot water of desired temperature can be supplied to the hot-water supply terminal or bathtub of each household by setting a terminal hot-water supply temperature and bath hot-water supply temperature using the operation terminal provided for every household. Therefore, it is a hot water supply device suitable for multiple households.

  In addition, in the configuration of the present invention, the amount of heat used for each household is finally calculated by the terminal hot water supply calorie measuring means, the bath hot water calorie measuring means, and the used heat amount calculating means, so how each household is You can see how much energy was used. Therefore, the cost burden in each household can be clarified.

  The best mode for carrying out the present invention will be described below with reference to the drawings. The following description relates to an example of the present invention, and the present invention is not limited to these.

  FIG. 1 shows a hot water supply apparatus 100 according to an embodiment of the present invention. Although this embodiment demonstrates the hot water supply apparatus 100 for two households for two-family houses, this invention is applicable also to the hot water supply apparatus for multiple households more than three households for apartment houses, for example. In this specification, for convenience of explanation, the left household in FIG. 1 is referred to as the left household, and the right household is referred to as the right household.

  The hot water supply device 100 includes a hot water storage tank unit 2 having a hot water storage tank 20, a heat pump unit 1 as a heating body, a processing device 8 that performs overall control, and operation terminals 6A and 6B provided for each household. I have.

  The hot water storage tank 20 stores hot water so that it can be pushed out from the upper part by water supplied to the lower part. In the hot water storage tank 20, the hot water is shifted upward and the cold water is shifted downward due to the difference in specific gravity. Is formed. Specifically, a water supply pipe 10 extending from a water source (not shown) such as a water pipe is connected to the lower part of the hot water storage tank 20. The water supply pipe 10 is provided with a water supply pressurizing pump 11 and a pressure reducing valve 12 in order from the upstream side, and the pressure in the hot water storage tank 20 is set to a pressure set by the pressure reducing valve 12 below the hot water storage tank 20. Water is supplied from the water source so that it can be maintained. The capacity of the hot water storage tank 20 is, for example, 450 to 600 L for two households. In addition, when the pressure of the water sent from a water source is high enough, you may abbreviate | omit the feed water pressurization pump 11. FIG. Further, the water supply pipe 10 is provided with a water supply temperature sensor 14 for measuring the temperature of water flowing through the water supply pipe 10 on the downstream side of the pressure reducing valve 12.

  The heat pump unit 1 has a refrigerant circuit 1a as shown in FIG. The refrigerant circuit 1a includes a compressor 1b that compresses the refrigerant, a high-pressure side heat exchanger 1c that exchanges heat with the water in the hot water storage tank 20 to dissipate heat, and an expansion unit 1d that expands the refrigerant that has dissipated heat. And a low-pressure side heat exchanger 1e that heat-exchanges the expanded refrigerant with the air blown by the fan 1f to evaporate it, and is connected in order. As the refrigerant, alternative chlorofluorocarbon or ammonia can be used, but carbon dioxide is preferably used. This is because if carbon dioxide is used, the compressed refrigerant is in a supercritical state, and hot water (eg, 90 ° C.) can be generated with high energy efficiency. The expansion means 1d may be a simple expansion valve or an expander for recovering power from the expanding refrigerant.

  The hot water storage tank 20 and the high pressure side heat exchanger 1 c of the heat pump unit 1 are connected in a loop by a water supply pipe 21 and a hot water supply pipe 22. Specifically, the lower part of the hot water storage tank 20 and the heated fluid inlet of the high pressure side heat exchanger 1c are connected by a water supply pipe 21, and the upper part of the hot water tank 20 and the heated fluid outlet of the high pressure side heat exchanger 1c are connected. Are connected by a hot water supply pipe 22. A boiling pump 23 is provided in the middle of the water supply pipe 21 so as to be positioned in the hot water storage tank unit 2. And by the operation of the boiling pump 23, the water in the hot water storage tank 20 is extracted from the lower part through the water pipe 21 and sent to the high-pressure side heat exchanger 1c, where it is heated to become hot hot water. . The generated hot water is returned to the upper part of the hot water storage tank 20 through the hot water supply pipe 22. Thus, hot water is stored in the hot water storage tank 20 from the upper side. That is, the water supply pipe 21, the heat pump unit 1, the hot water supply pipe 22, and the boiling pump 23 generate hot water by heating the water extracted from the lower part of the hot water storage tank 20 into hot water and returning the hot water to the upper part of the hot water storage tank 20. The means 15 is configured. In addition, the boiling pump 23 may be provided so that it may be located in the heat pump unit 1, and may be provided in the middle of the hot-water supply pipe 22. FIG.

  Further, a boiling temperature sensor 97 for measuring the temperature of the generated hot water is provided in the vicinity of the high-pressure side heat exchanger 1 c of the hot water supply pipe 22. Further, as shown in FIG. 1, a plurality of hot water storage temperature sensors 90 that measure the surface temperature of the hot water storage tank 20 are arranged in the hot water storage tank 20 in the vertical direction. Since the temperature distribution as described above is formed in the hot water storage tank 20, it is possible to grasp how much hot water is stored in the hot water storage tank 20 from the temperature measured by the hot water storage temperature sensor 90.

  In addition to the hot water storage tank 20, the hot water storage tank unit 2 has two hot water supply passages 3A and 3B for guiding the hot water stored in the hot water storage tank 20 to each household. The hot water supply path 3A for introducing hot water to the left household was stored in the hot water storage tank 20 and the terminal hot water supply path 3a for supplying the hot water stored in the hot water storage tank 20 to the hot water supply terminal 4A such as a faucet and shower of the left household. And a bath hot water supply path 3b for supplying hot water to the bathtub 5A of the left household. The hot water supply path 3B for introducing hot water to the right household was stored in the hot water storage tank 20 and the terminal hot water supply path 3c for supplying the hot water stored in the hot water storage tank 20 to the hot water supply terminal 4B such as a faucet and shower of the right household. A bath hot water supply path 3d for supplying hot water to the right household bathtub 5B. Terminal mixing valves 71 and 73 are respectively provided in the middle of the terminal hot water supply paths 3a and 3c, and bath mixing valves 72 and 74 are provided in the middle of the bath hot water supply paths 3b and 3d, respectively. Yes. A branch pipe 13 branched from a position downstream of the feed water temperature sensor 14 of the feed water pipe 10 is connected to each mixing valve 71 to 74. Then, the hot water from the hot water storage tank 20 is mixed with the water from the water supply pipe 10 (water from the water source) so that the hot water from the hot water storage tank 20 reaches a predetermined hot water supply temperature for the hot water supply terminals 4A and 4B by the terminal mixing valves 71 and 73. The hot water from the hot water storage tank 20 is mixed with the water from the water supply pipe 10 so that the hot water from the hot water storage tank 20 becomes a predetermined bath hot water supply temperature for the bathtubs 5A and 5B.

  Specifically, the terminal hot water supply paths 3a and 3c connect the first hot water discharge pipes 31 and 35 that connect the hot water storage tank 20 and the terminal mixing valves 71 and 73, and the terminal mixing valves 71 and 73 and the hot water supply terminals 4A and 4B. The first hot water supply pipes 32 and 36 are provided. A terminal for measuring the temperature of hot water flowing in the first hot water supply pipes 32 and 36, in other words, flowing downstream from the terminal mixing valves 71 and 73 of the terminal hot water supply paths 3a and 3c. Temperature sensors 91 and 93 and terminal flow meters 32a and 36a for measuring the flow rate of hot water supplied to the hot water supply terminals 4A and 4B through the first hot water supply pipes 32 and 36 are sequentially provided from the upstream side.

  On the other hand, the bath hot water supply passages 3b and 3d are secondary circulations, which will be described later, with the second hot water pipes 33 and 37 connecting the hot water storage tank 20 and the bath mixing valves 72 and 74, the bath mixing valves 72 and 74, and the bathtubs 5A and 5B. The second hot water supply pipes 34 and 38 are connected via the paths 51 and 53. In the second hot water supply pipes 34, 38, a bath that measures the temperature of hot water flowing in the second hot water supply pipes 34, 38, in other words, downstream of the bath mixing valves 72, 74 of the bath hot water supply passages 3b, 3d. Temperature sensors 92 and 94 and bath flow meters 34a and 38a for measuring the flow rate of hot water supplied to the bathtubs 5A and 5B through the second hot water supply pipes 34 and 38 are sequentially provided from the upstream side. The second hot water supply pipes 34, 38 are provided with solenoid valves 75, 76 on the downstream side of the bath flow meters 34a, 38a.

  In the example shown in FIG. 1, in the vicinity of the hot water storage tank 20, the first outlet pipe 31 and the second outlet pipe 33 on the left household side merge to form one pipe, and the first outlet pipe on the right household side. 35 and the second tapping pipe 37 merge to form a single pipe, but the first tapping pipes 31 and 35 merge to form a single pipe, and the second tapping pipes 33 and 37 merge. And it may be a single tube. Alternatively, all the hot water extraction pipes 31, 33, 35, and 37 may be joined to form a single pipe. Moreover, in the example shown in FIG. 1, although the pressure relief valve 29 is provided in the branch pipe 28 branched from the 2nd hot water pipe 33 of the left household side, the position which provides the pressure relief valve 29 can be changed suitably. .

  Furthermore, the hot water storage tank unit 2 has a configuration for performing a reheating operation in which the hot water in the bathtubs 5A and 5B is circulated and heated again. Specifically, the hot water storage tank unit 2 is a primary distribution that distributes hot water in the hot water storage tank 20 via the bath heat exchangers 55 and 56, and bath heat exchangers 55 and 56 provided for each household. Paths 24 and 26 and secondary flow passages 51 and 53 for circulating hot water in the bathtubs 5A and 5B through bath heat exchangers 55 and 56 are provided. In the bath heat exchangers 55 and 56, heat exchange is performed between the hot water flowing through the primary flow passages 24 and 26 and the hot water flowing through the secondary flow passages 51 and 53, and the hot water in the bathtubs 5A and 5B is exchanged. It is chased away.

  Specifically, one end of the primary flow passages 24, 26 is connected to the upper part of the hot water storage tank 20 via the hot water supply passages 3 </ b> A, 3 </ b> B, and the other end is directly connected to the lower part of the hot water storage tank 20. In the primary flow passages 24 and 26, reheating pumps 25 and 27 are provided between the other end and the bath heat exchangers 55 and 56, and hot water in the hot water storage tank is connected to the primary flow passages 24 and 26 at one end. It flows toward the other end. The primary flow passages 24 and 26 have inlet temperature sensors 98a and 99a for measuring the temperature of hot water flowing upstream from the bath heat exchangers 55 and 56, and hot water flowing downstream from the bath heat exchangers 55 and 56, respectively. Are provided with outlet temperature sensors 98b and 99b. Further, in the primary flow passages 24 and 26, reheating flow meters 24a and 26a for measuring the flow rate of hot water flowing through the primary flow passages 24 and 26 between the outlet temperature sensors 98b and 99b and the reheating pumps 25 and 27, respectively. Is provided.

  On the other hand, both ends of the secondary flow passages 51 and 53 are connected to the bathtubs 5A and 5B, and bath pumps 52 and 54 are provided in the middle of the secondary flow passages 51 and 53, respectively. The secondary flow passages 51 and 53 are provided with reheating temperature sensors 95 and 96 for measuring the temperature of the hot water flowing through the secondary flow passages 51 and 53 upstream of the bath pumps 52 and 54. The second hot water supply pipes 34 and 38 described above are connected to the downstream side of the bath pumps 52 and 54.

  The processing device 8 is constituted by a microcomputer or a DSP (digital signal processor), and as shown in FIG. 4, a control means 81, a terminal hot water supply heat amount calculation means 82, a bath hot water supply heat amount calculation means 83, a reheating heat amount calculation. Means 84 and heat consumption calculation means 85 are provided. Operation terminals 6A and 6B are connected to the processing device 8 so that they can communicate with each other by wire or wirelessly, and the various temperature sensors 14, 90 to 97, 98a, 98b, 99a, 99b and the various flow meters 32a described above. , 34a, 36a, 38a, 24a, 26a are connected. And the control means 81 of the processing apparatus 8 is according to the program memorize | stored previously, the heat pump unit 1, the terminal mixing valves 71 and 73, the bath mixing valves 72 and 74, and the various pumps 11, 23, 25, 27, described above. 52 and 54 are controlled. The processing performed by the terminal hot water supply heat amount calculation means 82, the bath hot water supply heat amount calculation means 83, the reheating heat amount calculation means 84, and the used heat amount calculation means 85 will be described later.

  The operation terminals 6A and 6B are capable of independently setting the terminal hot water temperature and the bath hot water temperature in the corresponding household. That is, the operation temperature 6A for the left household can set the terminal hot water supply temperature and the bath water supply temperature for the left household, and the operation terminal 6B for the right household can set the terminal hot water supply temperature and the bath hot water temperature for the right household. It has become. Each operation terminal 6A, 6B is composed of a kitchen remote controller 6a installed in a kitchen or a washroom, and a bath remote controller 6b installed in the bathroom. The terminal hot water supply temperature can be set by either the kitchen remote controller 6a or the bath remote controller 6b, and the bath hot water temperature can be set by the bath remote controller 6b. It is also possible to set the bath hot water temperature using the kitchen remote controller 6a.

  Specifically, as shown in FIG. 3A, the kitchen remote controller 6a includes a display unit 61 and an input unit 62 including a menu button 62a, a change button 62b, and a confirm button 62c. Further, the kitchen remote control 6a is provided with an automatic bath switch 63a that starts filling the bathtubs 5A and 5B.

  By pressing the menu button 62a, the user can set the terminal remote controller 6a in a state in which the terminal hot water supply temperature can be set, and by operating the change button 62b in this state, the terminal hot water supply temperature is set to a desired temperature ( Usually, the maximum temperature can be set to 60 ° C.). The set terminal hot-water supply temperature is displayed on display unit 61 and display unit 65 of bath remote controller 6b described later.

  Further, the display unit 61 also displays the amount of remaining hot water in the hot water storage tank 20 obtained from the temperature measured by the hot water storage temperature sensor 90 by the processing device 8.

  On the other hand, as shown in FIG. 3B, the bath remote controller 6b has a display unit 65 and an input unit 66 including a menu button 66a, a change button 66b, and a confirm button 66c, as with the kitchen remote controller 6a. ing. The bath remote controller 6b is provided with a bath automatic switch 67a for starting filling of the baths 5A and 5B and a reheating switch 67b for starting reheating.

  By pressing the menu button 66a, the user can set the bath remote controller 6b in a state in which the terminal hot water supply temperature can be set. In this state, the user can operate the change button 66b in the same manner as the kitchen remote controller 6a. The temperature can be set to a desired temperature. The set terminal hot water supply temperature is displayed on the display unit 65 and the display unit 61 of the kitchen remote controller 6a described above.

  In addition, the user can set the bath remote controller 6b to a state in which the bath hot water temperature can be set by pressing the menu button 66a, and the bath hot water temperature can be set to a desired value by operating the change button 66b in this state. The temperature can be set (usually about 32 to 48 ° C.). The set bath hot water temperature is displayed on the display unit 65.

  Further, the user can make the bath remote controller 6b in a state where the reheating temperature can be set by pressing the menu button 66a. By operating the change button 66b in this state, the bath remote controller 6b can be set. The reheating temperature can be set to a desired temperature (usually about 32 to 48 ° C.) individually. The set reheating temperature is displayed on the display unit 65.

  Next, main control performed by the control means 81 will be described in detail.

<Boiling operation>
The control means 81 determines whether or not a necessary amount of hot water is stored in the hot water storage tank 20 based on the temperature measured by the hot water storage temperature sensor 90, and a necessary amount of hot water remains in the hot water storage tank 20. If it is determined that it is not, the heat pump unit 1 and the boiling pump 23 are operated at an appropriate timing (for example, in the evening before the amount of hot water used increases, near dawn in the middle of the night when the electricity rate is low). About the boiling pump 23, the rotation speed is adjusted so that the temperature measured by the boiling temperature sensor 97 becomes a predetermined boiling temperature. As a result, hot water having a predetermined boiling temperature is stored in the hot water storage tank 20 from above. Then, when the control means 81 determines that the necessary amount of hot water has been stored in the hot water storage tank 20, the heat pump unit 1 and the boiling pump 23 are stopped and the hot water generation means 15 generates hot water (boiling). Exit.

<Terminal hot water operation>
When the hot water taps of the hot water supply terminals 4A and 4B are opened, the control means 81 mixes the terminals so that the temperature measured by the terminal temperature sensors 91 and 93 becomes the terminal hot water supply temperature set by the kitchen remote control 6a or the bath remote control 6b. The valves 71 and 73 are controlled to adjust the mixing ratio of hot water from the hot water storage tank 20 and water from the water supply pipe 10. As a result, the hot water from the hot water storage tank 20 is supplied to the hot water supply terminal 4A of the left household after being adjusted to the terminal hot water temperature set by the operation terminal 6A of the left household, and the hot water supply terminal 4B of the right household is supplied to the hot water storage tank 4B. Hot water from 20 is adjusted and supplied to the terminal hot water supply temperature set by the operation terminal 6B of the right household. When the hot water tap is closed, the hot water supply to the hot water supply terminals 4A and 4B is completed.

<Water filling operation>
When the automatic bath switches 63a and 67a of the kitchen remote controller 6a or the bath remote controller 6b are pressed, the control means 81 opens the electromagnetic valves 75 and 76, and the temperature measured by the bath temperature sensors 92 and 94 is set by the bath remote controller 6b. The bath mixing valves 72 and 74 are controlled so as to achieve the bath hot water supply temperature, and the mixing ratio of the hot water from the hot water storage tank 20 and the water from the water supply pipe 10 is adjusted. Thereby, the hot water from the hot water storage tank 20 is supplied to the bathtub 5A of the left household after being adjusted to the bath hot water temperature set by the operation terminal 6A of the left household, and the hot water tank 20 is supplied to the bathtub 5B of the right household. The hot water is adjusted to the bath hot water temperature set by the operation terminal 6B of the right household and supplied. Thereafter, the control means 81 closes the electromagnetic valves 75 and 76 and closes the bathtubs 5A and 5B when the water level detected by a water level sensor (not shown) provided in the secondary flow passages 51 and 53 reaches a predetermined bathtub water level. Finish the hot water filling.

<Casting driving>
When the reheating switch 67b of the bath remote controller 6b is pressed, the control means 81 operates the reheating pumps 25 and 27 and the bath pumps 52 and 54. Thereafter, when the temperature measured by the reheating temperature sensors 95 and 96 reaches the reheating temperature set by the bath remote controller 6b, the control means 81 stops the reheating pumps 25 and 27 and the bath pumps 52 and 54. To finish chasing.

  Next, processing performed by the terminal hot water supply heat amount calculation means 82, bath hot water supply heat amount calculation means 83, reheating heat amount calculation means 84, and used heat amount calculation means 85 of the processing device 8 will be described in detail.

The terminal hot water supply heat amount calculation means 82 calculates the terminal hot water supply heat amount used for hot water supply to the hot water supply terminals 4A and 4B for each household every time the terminal hot water supply operation is performed. Specifically, for the left household, the terminal hot water supply calorie calculating means 82 is measured by the flow rate Q _1A measured by the terminal flow meter 32a, the temperature T _1A measured by the terminal temperature sensor 91, and the feed water temperature sensor 14. The terminal hot water supply heat amount H _1A of the left household is calculated from the temperature T _{0 according} to the following equation (1).
H _1A = (T _1A −T ₀ ) × Q _1A (1)
Similarly, the terminal hot water supply calorie calculating means 82 is also measured for the right household by the flow rate Q _1B measured by the terminal flow meter 36 a, the temperature T _1B measured by the terminal temperature sensor 93, and the feed water temperature sensor 14. The terminal hot water supply heat amount H _1B of the right household is calculated from the temperature T ₀ .

That is, the terminal flowmeters 32a and 36a, the terminal temperature sensors 91 and 93, the feed water temperature sensor 14, and the terminal hot water supply heat amount calculation means 82 measure the terminal hot water supply heat amount used for hot water supply to the hot water supply terminals 4A and 4B. It constitutes a calorie measuring means. In this embodiment, the feed water temperature sensor 14 is used to accurately measure the amount of hot water supplied to the terminal, but in the above formula (1), for example, an estimated temperature according to the season is used instead of T _0. You may make it do.

The bath hot water supply calorie calculation means 83 calculates the bath hot water supply heat used for hot water supply to the bathtubs 5A and 5B for each household every time the hot water filling operation is performed. Specifically, for the left household, the bath hot water calorie calculating means 83 is measured by the flow rate Q _2A measured by the bath flow meter 34 a, the temperature T _2A measured by the bath temperature sensor 92, and the feed water temperature sensor 14. From the temperature T _{0, the} amount of hot water supplied to the left household H _2A is calculated according to the following equation (2).
H _2A = (T _2A −T ₀ ) × Q _2A Formula (2)
Similarly, the hot water supply heat amount calculation means 83 measures the flow rate Q _2B measured by the bath flow meter 38 a, the temperature T _2B measured by the bath temperature sensor 94, and the feed water temperature sensor 14 for the right household. From the temperature T _{0, the} amount of hot water supplied to the right household H _2B is calculated.

That is, the bath flowmeters 34a and 38a, the bath temperature sensors 92 and 94, the feed water temperature sensor 14, and the bath hot water supply heat amount calculation means 83 measure the bath hot water supply heat amount used for hot water supply to the bathtubs 5A and 5B. Configure the measuring means. In the present embodiment, the water supply temperature sensor 14 is employed to accurately measure the amount of hot water supplied to the bath. However, in the above equation (2), instead of T ₀ , for example, the season You may make it use the estimated temperature according to.

The reheating heat amount calculation means 84 calculates the reheating heat amount used for reheating the hot water in the bathtubs 5A and 5B for each household every time the reheating operation is performed. Specifically, for the left household, the reheating heat amount calculation means 84 measures the flow rate Q _3A measured by the reheating flow meter 24a, the temperature T _3A measured by the inlet temperature sensor 98a, and the outlet temperature sensor 98b. The reheating heat amount H _3A of the left household is calculated from the temperature T _4A thus obtained according to the following equation (3).
_H3A = ( _T3A - _T4A ) * _Q3A ... Formula (3)
Similarly, for the right household, the reheating heat amount calculation means 84 measures the flow rate Q _3B measured by the reheating flow meter 26a, the temperature T _3B measured by the inlet temperature sensor 99a, and the outlet temperature sensor 99b. The reheating heat amount H _3B of the right household is calculated from the temperature T _4B .

The use heat amount calculation means 85 includes terminal hot water supply heat amounts H _1A and H _1B calculated by the terminal hot water supply heat amount calculation means 82, bath water supply heat amounts H _2A and H _2B calculated by the bath hot water supply heat amount calculation means 83, and reheating heat amount calculation means 84. There calculated Reheating heat H _3A, integrates the H _3B for each household, and calculates the amount of heat used for a household. Specifically, for the left household, the used heat amount calculation means 85 already stores one of the terminal hot water supply heat amount H _1A , bath hot water supply heat amount H _2A , and reheating heat amount H _3A. The amount of heat used _HA is calculated by adding to the accumulated amount of heat _HA ', and is stored again as the amount of accumulated heat. Similarly, for the right household, the heat consumption calculation means 85 already stores any of the terminal hot water supply heat amount H _1B , the bath hot water supply heat amount H _2B , and the reheating heat amount H _3B . The amount of heat used H _B is calculated by adding to the amount of accumulated heat H _B ′, and this is stored again as the amount of accumulated heat. Also, the heat consumption calculating means 85 transmits the calculated heat consumption _HA of the left household to the kitchen remote control 6a of the left household and the heat consumption H _B of the right household to the kitchen remote control 6a of the right household, The amount of heat used is displayed on the display unit 61.

As described above, in the hot water supply apparatus 100 of this embodiment, the terminal hot water supply heat amount calculation means 82, the bath hot water supply heat amount calculation means 83, the reheating heat amount calculation means 84, and the used heat amount calculation means 85 ultimately use each household. Since the heat amounts H _A and H _B are calculated, it becomes possible to know at what rate each household has used energy. Therefore, the cost burden in each household can be clarified. For example, if the expense ratio of the left household H _A / a (H _A + H _B), so that fairness expense is obtained.

In addition, since the used heat amounts H _A and H _B for each household are displayed on the display unit 61 of the kitchen remote controller 6a of each household, the usage status of the heat amount can be confirmed at any time.

  Here, in this embodiment, the display 61 of the kitchen remote controller 6a displays the amount of heat used by the corresponding household, but the amount of heat used calculating means 85, for example, calculates the amount of heat used by the left household from the right household. It may also be transmitted to the kitchen remote control 6a so that the amount of heat used by households other than the corresponding household is displayed on the display unit 61. In this way, for example, if the left household is an elderly household and the right household is a relative household, the relative household will detect an anomaly in the elderly household by confirming the amount of heat used by the elderly household. Therefore, safety and convenience are improved.

  In the embodiment, the control unit 81, the terminal hot water supply heat amount calculation unit 82, the bath hot water supply heat amount calculation unit 83, the reheating heat amount calculation unit 84, and the used heat amount calculation unit 85 are formed as one unit as the processing device 8. Although shown in form, these means 81-85 may be separate units. Further, the terminal hot water supply heat amount calculation means 82, the bath hot water supply heat amount calculation means 83, and the reheating heat amount calculation means 84 are provided for each household so that the heat amount of one household is calculated by one heat amount calculation means. It may be. In this case, for example, the terminal hot water supply calorie calculating means for the left household may be disposed in the vicinity of the terminal temperature sensor 91 and the terminal flow meter 32a.

  The hot water supply apparatus 100 according to the embodiment includes the bath heat exchangers 55 and 56, the primary flow passages 24 and 26, and the secondary flow passages 51 and 53 as a configuration for reheating. This configuration is not an essential configuration and can be omitted. When the configuration for reheating is omitted, the use heat amount calculation unit 84 adds the terminal hot water supply heat amount calculated by the terminal hot water supply heat amount calculation unit 82 and the bath water supply heat amount calculated by the bath hot water supply heat amount calculation unit 83 for each household. The amount of heat used for each household is calculated.

  Moreover, although the hot water supply apparatus 100 for two households for two-family houses was shown in the said embodiment, in order to set it as the hot-water supply apparatus for multiple households of three or more households for collective housing, it is hot water supply path 3A, 3B and operation. What is necessary is just to increase the number of terminals 6A, 6B etc. according to the number of households.

  Further, for example, in the case of a hot water supply apparatus for an apartment house, a communication means for transmitting the heat consumption for each household calculated by the heat consumption calculation means 85 is further provided, and the heat consumption for each household is managed by this communication means, for example. You may make it transmit to a center. In this way, centralized management can be performed, and the cost burden of each household can be calculated collectively.

  In addition to the heat pump unit 1, an electric heater, a gas combustion device, or the like may be employed as the heating body that heats the water in the hot water storage tank 20.

It is a schematic structure figure of a hot-water supply device concerning one embodiment of the present invention. It is a schematic block diagram of the heat pump unit in the hot water supply apparatus of FIG. (A) is a front view of a kitchen remote control, (b) is a front view of a bath remote control. It is a block diagram of the hot-water supply apparatus of FIG. It is a schematic block diagram of the conventional hot water supply apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat pump unit 1a Refrigerant circuit 1b Compressor 1c High pressure side heat exchanger 1d Expansion means 1e Low pressure side heat exchanger 10 Water supply pipe 14 Water supply temperature sensor 15 Hot water generation means 2 Hot water storage tank unit 20 Hot water storage tank 21 Water supply pipe 22 Hot water supply pipe 23 Boiling pumps 24, 26 Primary flow passages 24a, 26a Reheating flow meters 3A, 3B Hot water supply passages 3a, 3c Terminal hot water supply passages 3b, 3d Bath hot water supply passages 30A, 30B Flow meters (measuring means)
32a, 46a Terminal flow meter 34a, 38a Bath flow meter 4A, 4B Hot water supply terminal 5A, 5B Bathtub 51, 53 Secondary flow passage 55, 56 Bath heat exchanger 6A, 6B Operation terminal 6a Kitchen remote control 6b Bath remote control 61, 65 Display Unit 62, 66 Input unit 71, 73 Terminal mixing valve 72, 74 Bath mixing valve 8 Processing device 81 Control means 82 Terminal hot water supply heat amount calculation means 83 Bath hot water supply heat amount calculation means 84 Reheating heat amount calculation means 85 Used heat amount calculation means 91, 93 Terminal temperature sensor 92, 94 Bath temperature sensor 98a, 99a Inlet temperature sensor 98b, 99b Outlet temperature sensor 100 Hot water supply device

Claims (7)

A hot water supply device for multiple households,
A hot water storage tank in which water is supplied to the lower part from the water supply pipe,
Hot water generating means for heating the water extracted from the lower part of the hot water storage tank into hot water and returning the hot water to the upper part of the hot water storage tank;
A plurality of terminal hot water passages for guiding the hot water stored in the hot water storage tank to each of the households and supplying the hot water to the hot water supply terminals of each household, and each of the hot water from the hot water storage tank has a predetermined terminal hot water temperature. A terminal hot water supply path provided with a terminal mixing valve for mixing with water from the water supply pipe,
A plurality of bath hot water passages for guiding the hot water stored in the hot water storage tank to each of the households and supplying the hot water from the hot water storage tank to a predetermined bath hot water temperature. A bath hot water supply passage provided with a bath mixing valve for mixing with water from the water supply pipe,
An operation terminal that is provided for each household and can independently set the terminal hot water temperature and the bath hot water temperature in the corresponding household,
Control means for controlling the hot water generating means, the terminal mixing valve, and the bath mixing valve;
Terminal hot water supply calorie measuring means for measuring the amount of hot water supplied from the terminal used for hot water supply to the hot water supply terminal;
Bath hot water supply calorie measuring means for measuring the amount of hot water supplied to the bathtub used for hot water supply;
Use heat amount calculating means for calculating the amount of heat used for each household by adding the amount of heat supplied to the terminal hot water measured by the means for measuring the amount of hot water supplied to the terminal and the amount of heat supplied to the hot water for the hot water supplied to the hot water by the means for measuring the amount of hot water supplied to the household. Bei to give a,
The terminal hot water supply calorie measuring means measures the temperature of the hot water supplied to the hot water supply terminal and the terminal temperature sensor that is provided in each of the terminal hot water supply paths and measures the temperature of the hot water flowing downstream from the terminal mixing valve. A terminal flow meter, and a terminal hot water supply calorie calculating means for calculating the terminal hot water supply heat amount using the temperature measured by the terminal temperature sensor and the flow rate measured by the terminal flow meter,
The bath hot water calorie measuring means measures a bath temperature sensor provided in each of the bath hot water passages to measure the temperature of hot water flowing downstream from the bath mixing valve and the flow rate of hot water supplied to the bathtub. A bath flow meter, and a bath hot water supply calorie calculation means for calculating the bath hot water supply heat amount using the temperature measured by the bath temperature sensor and the flow rate measured by the bath flow meter,
The water supply pipe is provided with a water supply temperature sensor for measuring the temperature of water flowing in the water supply pipe,
The terminal hot water supply heat amount calculating means calculates the terminal hot water supply heat amount from the flow rate measured by the terminal flow meter and the temperature measured by the terminal temperature sensor and the feed water temperature sensor,
The bath hot water supply calorie calculating means calculates the bath hot water supply calorie from the flow rate measured by the bath flow meter and the temperature measured by the bath temperature sensor and the water temperature sensor . Provided for each household, a bath heat exchanger for chasing hot water in the bathtub, a primary flow passage for circulating hot water in the hot water storage tank via the bath heat exchanger, and the bathtub A secondary flow passage for circulating the hot water in the bath via the bath heat exchanger,
In the primary flow passage, an inlet temperature sensor that measures the temperature of hot water flowing upstream from the bath heat exchanger, an outlet temperature sensor that measures the temperature of hot water flowing downstream from the bath heat exchanger, and A reheating flow meter that measures the flow rate of hot water flowing through the primary flow passage is provided,
Reheating heat amount calculating means for calculating reheating heat amount used for reheating from the flow rate measured by the reheating flow meter and the temperatures measured by the inlet temperature sensor and the outlet temperature sensor;
The use heat amount calculating means calculates the terminal hot water supply heat amount calculated by the terminal hot water supply heat amount calculation means, the bath hot water heat amount calculated by the bath hot water supply heat amount calculation means, and the reheating heat amount calculated by the reheating heat amount calculation means for each household. The hot water supply apparatus according to claim 1, wherein the amount of heat used for each household is calculated by adding to the household. 3. The hot water supply apparatus according to claim 1 , wherein each of the operation terminals has a display unit, and the display unit of the operation terminal displays the amount of heat used by a household corresponding to the operation terminal. The hot water supply apparatus according to claim 3, wherein the amount of heat used by a household other than the household corresponding to the operation terminal is also displayed on the display unit of the operation terminal. The hot water supply apparatus according to any one of claims 1 to 4 , further comprising a communication means for transmitting the amount of heat used for each household. The hot water generation means includes a heat pump unit having a refrigerant circuit in which a compressor, a high pressure side heat exchanger, an expansion means, and a low pressure side heat exchanger are sequentially connected, the high pressure side heat exchanger, and a lower part of the hot water storage tank. A water supply pipe connecting the high pressure side heat exchanger and the upper part of the hot water storage tank, and a pump provided in the water supply pipe or the hot water supply pipe . The hot water supply device according to any one of 5 . The hot water supply apparatus according to claim 6, wherein the heat pump unit uses carbon dioxide as a refrigerant.

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