JP2017026288A - Heat source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat source device that can use hot water in a hot water storage tank for hot water supply and use heat of the hot water for heating and other purposes.SOLUTION: A partition 4 is provided in the vicinity of a side wall in a hot water storage tank 1 to extend in the vertical direction of the hot water storage tank 1. By the partition 4, the inner side of the hot water storage tank 1 is partitioned into a small volume space chamber 6 on the side wall side and a large volume space chamber 7 excluding the small volume space chamber 6. The large volume space chamber 7 and the small volume space chamber 6 are communicated with each other on the upper end side and the lower end side of the partition 4. In the hot water storage tank 1, a hot water storage tank thermally connected heat exchanger 5 for taking out heat of hot water in the hot water storage tank 1 to outside is provided to exchange heat with the hot water stored in the small volume space chamber 6 to take out heat of the hot water stored in the small volume space chamber 6. The partition 4 serves as a blocking wall for preventing an effect of fluctuation of temperature distribution of the hot water in the small volume space chamber 6 caused during a heat exchange operation of the hot water storage tank thermally connected heat exchanger 5 from reaching the hot water stored in the large volume space chamber 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat source device that includes a hot water tank and uses hot water in the hot water tank for hot water supply or uses heat of hot water in the hot water tank for heating or the like.

  FIG. 6 shows a schematic side view of an example of the heat source device. This heat source device 3 has a hot water storage tank (hot water storage tank) 1 for storing hot water, a heating element 2, an auxiliary heat source device 27, and a passage connecting them. In FIG. Is indicated by an arrow in the direction of flow of water flowing through the passage (sometimes referred to as hot water or hot water).

  As shown in the figure, a heating element 2 disposed outside the hot water storage tank 1 is connected to the hot water storage tank 1 through a water supply passage 12 and a heat recovery passage 13. The heating element 2 functions as a heating means for heating the water stored in the hot water storage tank 1, and the water supply passage 12 supplies water to the heating element 2 from the lower side of the hot water storage tank 1 to recover heat. The passage 13 sends the hot water heated by the heating element 2 to the hot water storage tank 1 and introduces the hot water into the hot water storage tank 1 from the upper side of the hot water storage tank 1. As the heating element 2, for example, a solar power hot water unit or a heat pump unit provided with a power generator or a heat collector that collects solar heat is applied.

  When the heating element 2 is formed by a power generation device, the water supplied from the hot water storage tank 1 to the heating element 2 (power generation device) through the water supply passage 12 functions as cooling water, and heats the water by the exhaust heat of the power generation device. Then, the hot water is introduced into the hot water storage tank 1 from the heat recovery passage 13 and stored in the hot water storage tank 1. The power generator is formed by a fuel cell (FC) such as a polymer electrolyte fuel cell (PEFC) or a solid oxide fuel cell (SOFC), a gas engine, or the like. It is a power generation device that generates electricity by reacting hydrogen extracted from a fuel such as city gas with oxygen in the air by a reverse reaction of water electrolysis.

  The hot water storage tank 1 is connected with a water supply passage 11 for supplying water from a water supply source (not shown) to the hot water storage tank 1 on the lower side, and with a hot water passage 14 on the upper side. ing. The hot water passage 14 is a passage for supplying hot water from the upper side of the hot water storage tank 1 to the hot water supply destination, and guides the water stored in the hot water storage tank 1 from the upper end side of the hot water storage tank 1. A branch passage 17 branched from the water supply passage 11 and a hot water circulation passage 16 are connected to the hot water passage 14 via a mixing valve 15, and an auxiliary heat source device 27 is connected to the hot water circulation passage 16, for example, an auxiliary The heat source device 27 and the hot water storage tank 1 are accommodated in the same case (not shown). The auxiliary heat source device 27 is formed by a water heater provided with a burner or the like (not shown in the figure).

  For example, as shown in the figure, a layer of temperature is formed in the hot water storage tank 1 in the vertical direction, and the upper layer (the high temperature layer H) of the hot water storage tank 1 (line A in the figure). The hot water of high temperature Ta (for example, about 65 ° C.) heated by the heating element 2 is stored. Further, the lower layer (low temperature layer C) of the hot water storage tank 1 (see the lower side of the line B in the figure) has the same temperature Tc (for example, about 15 ° C.) as the temperature of the hot water supplied to the hot water storage tank 1. Water is stored, and a layer (temperature intermediate layer) having a temperature gradient from, for example, temperature Ta to temperature Tc is formed in the meantime.

  The hot water storage tank 1 is made of, for example, stainless steel and is not shown in the figure, but the hot water storage tank 1 has a temperature detection means (thermistor) for detecting the hot water temperature in the hot water storage tank 1. For example, a plurality of hot water storage tanks 1 are provided on the outside of the sidewall of the hot water storage tank 1 with a space in the vertical direction. And by detecting the temperature according to the water level (liquid level) of the hot water in the hot water storage tank 1 by this thermistor, for example, as shown by the line A in FIG. The boundaries of

  Further, the boundary between the high temperature layer H and the temperature intermediate layer is grasped, and the amount of water (hot water) in the high temperature layer H that is substantially used for hot water supply stored on the upper side of the line A in FIG. 6 is grasped. Thus, the amount of heat stored in the hot water storage tank 1 can be known, and hot water supply temperature (hot water temperature) in hot water supply from the hot water storage tank 1 via the auxiliary heat source device 27 can be controlled.

  For example, when the temperature of the hot water led out from the hot water storage tank 1 through the hot water passage 14 is lower than the hot water supply set temperature (that is, when the detected temperature of the thermistor provided at the top is lower than the hot water supply set temperature), Heating (follow-up heating) is performed by the auxiliary heat source device 27 so that hot water having a hot water supply set temperature can be supplied from the hot water supply passage 18 to the hot water supply destination.

  On the other hand, when the hot water temperature in the hot water storage tank 1 is equal to or higher than the hot water supply set temperature, the auxiliary heat source device 27 does not heat the hot water, and branches from the hot water and the water supply source, for example, 65 ° C. The water led out through 17 is mixed as required by the control of the mixing valve 15 and supplied to the hot water supply destination without heating through the hot water circulation passage 16 and the hot water supply circuit in the auxiliary heat source device 27.

  In the heat source device as described above, for example, the hot water in the hot water storage tank 1 is heated by the heating element 2 so that hot water in the temperature intermediate layer is not formed in the hot water storage tank 1 as much as possible. When the heated water is heated by the heating element 2 and introduced into the hot water storage tank 1 from the heat recovery passage 13 and stored in the hot water storage tank 1, the derivation of water from the hot water storage tank 1 and the introduction of water into the hot water storage tank 1 are gentle. It has been devised to do.

  Then, as shown in FIGS. 7A to 7F, the water in the hot water storage tank 1 is gradually heated in a state in which a temperature intermediate layer is hardly formed between the high temperature layer H and the low temperature layer C. It is desirable that the amount of heat stored in the hot water storage tank 1 is increased so that the high temperature layer on the upper side of the line A in the figure gradually increases with time.

  One reason for this is that the hot water in the temperature intermediate layer is difficult to use because it has a temperature gradient depending on the water level. As described above, when the water in the hot water storage tank 1 is used for hot water supply, the capacity of the high temperature layer is grasped, and the hot water supply water (water) derived from the hot water passage 14 is supplied to the water supply passage. The water stored in the hot water storage tank 1 generally indicates the amount of heat held by the high temperature layer H, and hot water is used according to the amount of heat. It has been broken.

  In addition, it is desirable that the temperature intermediate layer is not formed as much as possible. When the heating element 2 is formed by a power generator, water in the low temperature layer C is used as cooling water for the power generator, and thus water in the low temperature layer is used. It is desirable that the water is cold, and the water in the temperature intermediate layer that is neither cold nor hot is difficult to use in this respect.

  Furthermore, it is desirable that the temperature intermediate layer is not formed as much as possible. Since the hot water temperature in the hot water storage tank 1 is a temperature of 30 to 45 ° C., various germs are likely to propagate. Therefore, such a hot water temperature temperature intermediate layer is formed. It is mentioned that it is not preferable. In addition, based on the detected temperature detected by the thermistor, when the detected temperature is, for example, 30 to 45 ° C., it is determined that germs are likely to propagate and the water quality is not good. The hot water stored in the hot water is not preferable in terms of hygiene to supply hot water as it is, so it can only be used after being reheated. And it is a problem to take a technique of mixing the low-temperature water after reheating so that the hot-water supply set temperature is reached, which hinders energy saving.

  Further, the reason why it is desirable that the temperature intermediate layer is not formed as much as possible is as follows. That is, when the user is using the hot water supply set temperature as 42 ° C., for example, and the hot water temperature in the hot water storage tank 1 is 45 ° C., the display of the remote control device signal-connected to the heat source device is The content such as “there is heat storage” is displayed in the hot water storage tank 1. In addition, when the user switches the hot water supply set temperature to 50 ° C. in this state, the display on the remote control device must be switched to a display of “no heat storage” in the hot water storage tank 1, and the hot water set temperature is set a little. Since the display of “with heat storage” and “without heat storage” is switched simply by switching, the user may be confused.

  For the above reasons, the above-described device is devised so that the temperature intermediate layer is not formed in the hot water storage tank 1 as much as possible.

JP 2014-142140 A

  By the way, as mentioned above, as a hot water supply device applied as an auxiliary heat source device, in recent years, a device having a heating circuit capable of supplying a heating heat medium to the heating device has been widely used. In addition, a hot water supply apparatus provided with a circuit for reheating a bath has been widely used in the past, and a heating circuit and a circuit for reheating a bath may be combined with a liquid-liquid such as a water-water heat exchanger. Auxiliary heat source devices that are connected via a heat exchanger and recuperate the bath using the heat of the heat medium passing through the heating circuit are also used.

  Therefore, if the heat of the hot water stored in the hot water storage tank 1 can be used for heating or reheating of the bath, for example, when the power generation device is applied as the heating element 2, the amount of exhaust heat used by the power generation device increases and energy saving is achieved. However, a heat source device having a configuration in which the heat of hot water in the hot water storage tank 1 is used for heating the heat medium in the heating circuit has not been proposed.

  For example, a configuration as shown in FIG. 8 is considered as a configuration in which the heat of hot water in the hot water storage tank 1 is used for heating the heating medium in the reheating circuit of the bath. With use, a temperature intermediate layer having a large capacity is formed from the initial stage of heat use, which is not preferable.

  That is, for example, in the configuration shown in FIG. 8, the heat exchanger 21 for taking out the heat of hot water in the hot water storage tank 1 is provided on the side wall of the hot water storage tank 1, and the heat exchanger is driven as the pump 35 is driven. The hot water in the hot water storage tank 1 is circulated through the passage 21 and the passage 39, and the heat exchanger 21 is thermally connected to the heat exchanger 22 provided in the reheating circuit 23 of the bath. Although it is configured to perform heat exchange, the heat of the hot water in the hot water storage tank 1 is used for replenishing the bath. The following can be considered.

  The bath water temperature of the bath is, for example, about 10 ° C. to 45 ° C. If the temperature of the hot water introduced from the hot water storage tank 1 side into the heat exchanger 21 on the hot water storage tank 1 side is constant, the bath hot water temperature is low. The hot water temperature returning to the heat exchanger 22 side becomes lower, and the temperature of the hot water returning to the hot water storage tank 1 side from the heat exchanger 21 by heat exchange with the hot water in the heat exchanger 22 is also lowered.

  In consideration of user convenience, the hot water temperature introduced into the heat exchanger 21 from the hot water storage tank 1 side is preferably a constant temperature, and the hot water temperature returned through the heat exchanger 22 on the hot water storage tank 1 side is many times. However, it is preferable to maintain a certain degree of temperature stratification. For example, as shown in FIG. 9A, in the hot water storage tank 1, a high temperature layer H (for example, a water layer having a temperature of 65 ° C.) and a low temperature layer C ( For example, when heat is extracted from the high-temperature layer H in the hot water storage tank 1 in the portion M from a state where a water layer having a temperature of 15 ° C. is formed (the temperature of water in the portion M is higher than 15 ° C., for example, 65 When the temperature is lower than 0 ° C., temperature stratification cannot be maintained as described below.

  That is, since the water of M part should exist in the height between the high temperature layer H and the low temperature layer C from the relationship of the specific gravity of water, as shown in FIG.9 (b), for example, It sinks towards its original position. Then, in the sedimentation process, the water is stirred with the water of the high temperature layer H, the temperature is averaged to be as shown in FIG. 9C, and has an average temperature between the high temperature layer H and the low temperature layer C. A temperature intermediate layer (see dot portion in the figure) having a large capacity is formed.

  The temperature intermediate layer formed here has a temperature within a temperature range of an average temperature between the high temperature layer H of 65 ° C. and the low temperature layer C of 15 ° C., for example, although there is not much temperature distribution in the layer. For this reason, for example, as described above, there are cases where the temperature of the heating element 2 cannot be used as cooling water when the heat generating device 2 is formed by a power generation device, or the temperature at which miscellaneous bacteria can easily propagate. It is very preferable that such water is present in a large amount in the hot water storage tank 1 and has a very small capacity of water in the high temperature layer H that is originally preferable for hot water use and water in the low temperature layer C that is easy to use as cooling water. There is no state.

  9D to 9F are reference diagrams for supplementing the temperature averaging phenomenon of the hot water temperature in the hot water storage tank 1, and as shown in FIG. In the case where heat is applied to the low temperature layer C (for example, a water layer at a temperature of 15 ° C.) formed under the high temperature layer H (for example, a water layer at a temperature of 65 ° C.) in a portion M by any method. This shows a state in which a large temperature intermediate layer is formed.

  That is, in FIG. 9D, for example, when the temperature of water in the M portion is higher than 15 ° C. and lower than 65 ° C., for example, the water in the M portion Since it should exist at the height between the layers C, as shown in FIG. 9E, for example, it rises toward its originally existing position. Then, in the rising process, the water is agitated with the water of the low temperature layer C, and the temperature is averaged to be as shown in FIG. 9 (f). In this case as well, for example, the high temperature layer H of 65 ° C. and 15 A large-capacity temperature intermediate layer (see the dot portion in the figure) having an average temperature with the low temperature layer C at 0 ° C. is formed, resulting in the same problem as described above.

  The present invention has been made to solve the above-mentioned problems, and its purpose is to use the hot water stored in the hot water storage tank for hot water supply, as well as use the heat of the hot water for heating, reheating the bath, etc. Another object of the present invention is to provide a heat source device that is easy to use, hygienic and can improve energy saving.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the first invention has a hot water storage tank for storing hot water heated by an externally arranged heating means, and a hot water passage for deriving the hot water stored in the hot water storage tank from the upper side of the hot water storage tank. In the hot water storage tank, a partition extending in the vertical direction of the hot water storage tank is provided in the vicinity of the side wall of the hot water storage tank, and the hot water storage tank has a small volume space chamber on the side wall side by the partition. And the large volume space chamber other than the small volume space chamber, the large volume space chamber and the small volume space chamber communicate with each other on the upper end side and the lower end side of the partition, A hot water storage tank thermal connection heat exchanger for taking out the heat of the hot water in the hot water storage tank is provided, and the hot water storage tank thermal connection heat exchanger is connected to the hot water stored in the small volume space chamber. The heat of the hot water stored in the small volume room is taken outside by heat exchange. The partition is configured to store the hot water in the large volume space chamber due to the turbulence of the temperature distribution of the hot water in the small volume space chamber that is generated during the heat exchange operation by the hot water tank thermal connection heat exchanger. It is a means to solve the problem with the structure formed of a blocking wall that blocks the hot water side.

  Further, in the second invention, in addition to the configuration of the first invention, the heating means is formed by a power generator, and the power generator is thermally connected to the hot water storage tank through a heat supply passage. It is characterized by.

  According to the present invention, the hot water stored in the hot water tank can be led out from the upper side of the hot water tank through the hot water passage and used. It can be used for sowing and the like, and it can be a user-friendly and sanitary heat source device. In other words, in the present invention, a partition extending in the vertical direction of the hot water storage tank is provided in the vicinity of the side wall of the hot water storage tank in the hot water storage tank, and the inside of the hot water storage tank has a small volume on the side wall side by the partition. It is divided into a space chamber and a large volume space chamber other than the small volume space chamber. The large volume space chamber and the small volume space chamber communicate with each other on the upper end side and the lower end side of the partition.

  The hot water storage tank is provided with a hot water storage tank thermal connection heat exchanger for taking out the heat of the hot water in the hot water storage tank to the outside, and the hot water storage tank thermal connection heat exchanger is provided in the small volume space chamber. Since the heat of the hot water stored in the small-volume space chamber is extracted outside by heat exchange with the hot water stored in the hot water storage, the heat exchange operation by the hot water storage tank thermal connection heat exchanger is small. Heat is taken out from the hot water in the volumetric space chamber, and the temperature of the hot water is averaged in the small volumetric chamber.

  Further, at this time, the hot water on the large volume space chamber side enters the small volume space chamber from the upper end side of the partition, and the temperature-averaged hot water may move from the small volume space chamber side to the large volume space chamber side. It is repeated that the temperature of the hot water introduced into the small volume space chamber is taken out and the temperature is averaged. Therefore, the heat of the hot water in the hot water storage tank is taken out well, and the large volume space chamber and the small volume space chamber are partitioned by the partition and communicated only at the upper end side and the lower end side of the partition. Therefore, even if the hot water (water) is moved as described above, the temperature stratification on the large volume space chamber side does not collapse greatly.

  That is, in the present invention, hot water stored in the large volume space chamber is affected by the disturbance of the temperature distribution of the hot water in the small volume space chamber that occurs during the heat exchange operation by the hot water tank thermal connection heat exchanger. Since the large-capacity space chamber does not form a large-capacity temperature intermediate layer from the initial stage of heat extraction, the large-capacity space chamber side The heat of the hot water in the hot water storage tank is taken out to the outside while the temperature stratification remains almost unchanged. And since the capacity of the high temperature layer is gradually reduced as the amount of heat storage accompanying the heat extraction decreases while the temperature stratification remains almost unchanged, for example, a hot water storage tank in the middle of the heat extraction of the hot water Even when the hot water inside is drawn out from the hot water passage and used for hot water supply, the hot water can be used appropriately, and the heat can be effectively used such as heating using the heat of the hot water. .

  Also, when the capacity of the high temperature layer is small, for example, about half of the total capacity of the hot water tank at the start of the heat exchange operation (heat extraction) by the hot water tank thermal connection heat exchanger, depending on the capacity, The temperature of the temperature intermediate layer formed by the exchange operation becomes lower, and depending on the amount of heat taken out, the temperature of the temperature intermediate layer can be kept from becoming an unsanitary temperature (about 30 to 45 ° C.). Details of such a state will be described later.

  Further, the heating means is formed by a power generation device, and the power generation device is thermally connected to the hot water storage tank via the heat supply passage, thereby heating the hot water in the hot water storage tank using the exhaust heat of the power generation apparatus. The hot water can be used for hot water supply or the heat of the hot water can be used for heating or the like. And by making the heat source device using the exhaust heat of such a power generation device into a heat source device having the configuration of the present invention, it is difficult for the temperature intermediate layer to be formed in the hot water tank, and the temperature of the water in the low temperature layer can be kept low. Therefore, the power generation efficiency of the power generation device can be improved, and a heat source device with high energy saving can be realized.

It is a typical system block diagram of one Example of the heat-source apparatus which concerns on this invention. It is the typical cross-sectional view (a) of the hot water storage tank provided in the heat source apparatus of an Example, and the perspective view (b) which abbreviate | omits a part of the hot water storage tank, and shows typically. It is a perspective view which omits a part of hot water storage tank upper part side, and shows typically composition of a hot water storage tank provided in a heat source device of other examples. It is typical longitudinal cross-sectional explanatory drawing for demonstrating the example of hot water temperature change in the hot water storage tank produced by taking out the heat | fever of hot water outside in the hot water storage tank provided in the heat source apparatus of the Example. It is typical longitudinal cross-sectional explanatory drawing for demonstrating another example of the hot water temperature change in the hot water storage tank produced by taking out the heat of hot water outside in the hot water storage tank provided in the heat source device of the Example. It is typical explanatory drawing which shows the system structural example of the heat-source apparatus provided with the hot water storage tank. It is typical explanatory drawing for demonstrating the temperature stratification formation state by the hot water in a hot water storage tank being heated. It is a typical system figure which shows the structure plan which reheats a bath using the heat of the hot water in a hot water storage tank. It is a typical explanatory view for explaining the temperature intermediate layer formation state when the region of the temperature between the high temperature layer and the low temperature layer is formed in the high temperature layer or the low temperature layer in the hot water storage tank. It is typical longitudinal cross-sectional explanatory drawing for demonstrating the example of hot water temperature change in the hot water storage tank produced by taking out the heat of hot water outside in the hot water storage tank provided in the heat source device of the comparative example. It is typical longitudinal cross-sectional explanatory drawing for demonstrating another example of the hot water temperature change in the hot water storage tank produced by taking out the heat of hot water outside in the hot water storage tank provided in the heat source apparatus of another comparative example. It is typical longitudinal cross-sectional explanatory drawing for demonstrating another example of the hot water temperature change in a hot water storage tank produced by taking out the heat | fever of hot water outside in the hot water storage tank provided in the heat source apparatus of the structure shown in FIG. FIG. 12 is a schematic vertical cross-sectional explanatory diagram for explaining an example of hot water temperature change in a hot water storage tank generated by extracting the heat of hot water to the outside in the hot water storage tank provided in the heat source device having the configuration shown in FIG. 11.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment, the same reference numerals are given to the same constituent elements as those in the above-described examples, and the duplicate description is omitted or simplified.

  FIG. 1 is a schematic cross-sectional view showing a system configuration of an embodiment of a heat source device according to the present invention. The heat source device 3 shown in the figure has a hot water storage tank (hot water storage tank) 1, an auxiliary heat source device 27, a heating element 2, and a passage connecting them, as in the conventional example. In the figure, for example, a heating element 2 formed by a power generator and a passage connecting the heating element 2 and the hot water storage tank 1 are omitted.

  The auxiliary heat source device 27 is provided with a heating circuit 25. The heating circuit 25 is connected to an appropriate heating device such as a hot water mat 37 shown in FIG. Although the hot water mat 37 is disposed on the floor or the like, in order to make the figure easy to understand, the hot water mat 37 is illustrated in a leaning shape in the figure. The heating circuit 25 has a heating heat exchanger 26 and passages 8 and 9, and the hot water supply circuit 19 has a hot water supply heat exchanger 20, a hot water supply passage 17, and a hot water supply passage 18. In the figure, reference numeral 10 denotes a circulation pump, reference numeral 28 denotes a heating burner, and reference numeral 29 denotes a hot water supply burner.

  In this embodiment, the partition 4 is provided in the hot water storage tank 1 and the hot water storage tank thermal connection heat exchanger 5 for taking out the heat of the hot water in the hot water storage tank 1 is provided on the side wall of the hot water storage tank 1. It is characterized by that. As shown in FIG. 1 and FIG. 2, the partition 4 is provided in the vicinity of the side wall of the hot water storage tank 1 and extends in the vertical direction of the hot water storage tank 1. Are divided into a small volume space chamber 6 and a large volume space chamber 7 other than the small volume space chamber 6. In addition, the partition 4 is not provided in the upper end side and lower end side of the hot water storage tank 1, and by this structure, the large volume space chamber 6 and the small volume space chamber 7 are respectively in the upper end side and lower end side of the partition 4. It is communicated.

  Further, in this embodiment, the partition 4 is made of resin and has heat insulation properties, and both side end portions 30 and 31 of the partition 4 shown in the cross-sectional view of FIG. 2A are respectively hot water storage tanks. 1 is fixed in a liquid-tight manner on the inside of the side wall. In the figure, the angle θ is formed to be about 120 degrees, and the distance S between the central portion of the partition 4 and the inner side wall of the hot water storage tank 1 is larger than the distance between both side ends of the partition 4 and the inner side wall of the hot water storage tank 1. Widely formed. For example, the inner diameter of the hot water storage tank 1 is 300 cm, and S = 2 cm.

  As shown in FIGS. 1 and 2A, the hot water tank thermal connection heat exchanger 5 is provided on the upper side of the hot water storage tank 1, for example, and is a curved surface that is thermally connected to the outer peripheral surface of the hot water storage tank 1. It has a shape thermal connection surface, is provided along the outer peripheral side of the side wall, and extends in the vertical direction. In a configuration in which a heat medium is circulated in the circuit, such as the heating circuit 25 or the bath reheating circuit 23, it is not preferable to introduce hot water in the hot water storage tank 1 directly into the heating or reheating circuit 23. In the present embodiment, such a hot water storage tank thermal connection heat exchanger 5 is provided to transmit the hot water in the hot water storage tank 1 to the heating circuit 25 side, and the hot water tank thermal connection heat exchanger 5 is The heat of the hot water stored in the small volume space chamber 6 is extracted outside by heat exchange with the hot water stored in the small volume space chamber 6.

  Further, in this embodiment, the hot water stored in the large volume space 7 is affected by the disturbance of the temperature distribution of the hot water in the small volume space 6 that occurs when the partition 4 performs the heat exchange operation by the hot water tank thermal connection heat exchanger 5. In the present embodiment, the barrier wall that blocks the hot water side is cut off. With respect to the operational effect of providing the partition plate 4 in this embodiment, the comparative example including the conventional hot water storage tank 1 that does not have the partition plate 4 is provided. The comparison will be specifically described below.

  4, 5, and FIGS. 10 to 13, simulation results of the heat extraction state of the hot water in the hot water storage tank and the temperature change in the hot water storage tank in the heat source device of this embodiment and the heat source device of the comparative example are obtained. Each result is shown.

  4 and 5 show states in the present embodiment, and FIGS. 10, 11, 12, and 13 show states in the comparative example. In each of the comparative examples, the partition 4 provided in the hot water storage tank 1 in the present embodiment is not provided. FIGS. 10 and 12 show the heat exchangers 21 and 22 heated on the side wall of the hot water storage tank 1. 11 and 13, the heat exchanger 22 is directly provided on the outer peripheral wall of the hot water storage tank 1. The heat exchanger 22 is provided in the heating circuit 25 similarly to the hot water tank thermal connection heat exchanger 5 in the present embodiment. In FIGS. 11 and 13, the heat exchanger 22 is as in the present embodiment. The hot water storage tank 1 is provided on the outer wall of the side peripheral wall. In each of these examples, the heat extraction position is about 10 liters from the top of the hot water storage tank 1 and 50 liters in the range of about 10 liters from the top to about 60 liters. Heat is extracted from the capacity region.

  For example, as shown in FIG. 10A, in the comparative example, in a hot water storage tank 1 having a capacity of 150 liters, a 120 liter high temperature layer H (water temperature 65 ° C.) and a 30 liter low temperature layer C (water temperature 15 ° C.). When heat is extracted by heat exchange between the heat exchanger 21 and the heat exchanger 22, a phenomenon as shown in order in FIGS. 10 (a) to 10 (e) occurs. I understood.

  In the example shown in FIG. 10, the heat exchanger 21 is provided in a passage 39 for circulating hot water in the hot water storage tank 1 as shown in FIG. 8, and the heat exchanger 22 is provided in a heating circuit. It is assumed that the heat is supplied to the heating circuit side at 65 ° C., and the water circulated through the heating circuit returns to the heat exchanger 22 at 55 ° C. In the state of FIG. 10A and FIG. 11A described later, the total heat storage amount in the hot water storage tank 1 is (65-15) × 120 = 6000 kcal, so the amount of heat that can be supplied to the heating circuit side is (65−55) × (120−10) = 1100 kcal (Formula A), which is the same in FIG. In addition, the value of “10” in the (formula A) corresponds to 10 liters which is the volume of the high temperature layer H portion in (e) of each of FIGS.

  When heat is supplied from the hot water storage tank 1 side to the heating circuit side, the state in the hot water storage tank 1 after taking out 300 kcal is as shown in FIG. 10B, and the state in the hot water storage tank 1 after taking out 600 kcal is shown in FIG. c), the state in the hot water storage tank 1 after taking out 900 kcal is as shown in FIG. 10 (d), and the state in the hot water storage tank 1 after taking out 1100 kcal is as shown in FIG. 10 (e). Become. Note that the temperature of the intermediate layer formed between the high temperature layer H and the low temperature layer C gradually decreases from 65 ° C. as D, E, F, and G, and the last G is G = 55 ° C. Become

  In the example shown in FIG. 11, the capacity of the high temperature layer H becomes very small from the initial stage (see FIG. 11B after taking out 300 kcal) more than the example shown in FIG. Capacity increases. The temperature of the temperature intermediate layer gradually decreases. For example, the temperatures D to G in the figure are D = 62.3 ° C., E = 59.5 ° C., F = 56.8 ° C., G = 55 ° C.

  On the other hand, in the state of this embodiment shown in FIG. 4, the hot water storage tank thermal connection heat exchanger 5 stores hot water in the small volume space chamber 6 by heat exchange with hot water stored in the small volume space chamber 6. Since the heat of the hot water is taken out to the outside, at the time of heat exchange operation by the hot water storage tank thermal connection heat exchanger 5, heat is taken out from the hot water in the small volume space 6 to the small volume. Although the temperature of the hot water is averaged in the space 6, the temperature stratification on the large-capacity space chamber side hardly collapses.

  That is, unlike the comparative example shown in FIGS. 10 and 11, a large-capacity temperature intermediate layer is not formed from the beginning of heat extraction, and the thermal stratification is maintained while maintaining the temperature stratification on the large volume space chamber 7 side. As the capacity of the high temperature layer H gradually decreases with the decrease in the amount of stored heat accompanying the removal of the hot water, the use of heat such as hot water using the hot water of the high temperature layer H or heating using the heat of the hot water should be performed effectively Can do. In FIG. 4, G = 55 ° C., and E is a temperature within a range higher than 55 ° C. and lower than 65 ° C.

  Further, when heat is extracted by the hot water storage tank thermal connection heat exchanger 5, hot water on the large volume space chamber 7 side enters the small volume space 6 from the upper end side of the partition 4, and the inside of the small volume space chamber 6. Since cold hot water (water) moves to the large volume space chamber 7 side, the heat can be extracted from the hot water in the hot water storage tank 1 by performing the operation of extracting heat from the hot water in the small volume space 6 without a pump. Thus, it is advantageous in terms of cost as compared with the configuration in which the pump 35 is provided as shown in FIG. 10, and as described above, the temperature stratification on the large volume space chamber 7 side is not greatly collapsed.

  Furthermore, in the aspect shown in FIG. 11, the temperature taken out by the heat exchangers 21 and 22 (the temperature of the hot water in the hot water storage tank 1 that exchanges heat with the heat exchangers 21 and 22) gradually decreases. In the present embodiment shown in FIG. 4, heat is taken out from a region where hot water having a constant temperature of, for example, 65 ° C. is sequentially entered from the upper end side of the partition 4 into the small volume space 6 from the large volume space chamber 7 side. Therefore, it is not necessary to form the hot water tank thermal connection heat exchanger 5 as large as the heat exchangers 21 and 22, and the small hot water tank thermal connection heat exchanger 5 can efficiently extract heat. it can.

  12 and 13, respectively, in the comparative example, in a hot water storage tank 1 having a capacity of 150 liters, a 75 liter high temperature layer H (water temperature 65 ° C.) and a 75 liter low temperature layer C ( The simulation results in the case of having a water temperature of 15 ° C. are shown. Also in these examples, only the heat exchangers 21 and 22 or the heat exchanger 22 are provided, and the same as the above except for the capacities of the high temperature layer H and the low temperature layer C. For example, it is assumed that the heat exchanger 21 is provided in a passage 39 for circulating hot water in the hot water storage tank 1 as shown in FIG. 8, and the heat exchanger 22 is provided in a heating circuit. . Also, heat is supplied to the heating circuit side at 65 ° C., and the water circulated through the heating circuit returns to the heat exchanger 22 at 55 ° C.

  12 (a) and 13 (a), the total amount of heat stored in the hot water storage tank 1 is (65-15) × 75 = 3750 kcal, so the amount of heat that can be supplied to the heating circuit side is (65− 55) × (75−10) = 650 kcal (Formula B). The same applies to FIG. In addition, the value of “10” in the (formula B) corresponds to 10 liters, which is the volume of the high temperature layer H portion in (e) of each of FIGS.

  When heat is supplied from the hot water storage tank 1 side to the heating circuit side, in each of FIGS. 12 and 13, the state in the hot water storage tank 1 after taking out 200 kcal is as shown in FIG. (C), the state in the hot water storage tank 1 after taking out 500 kcal is shown in (d), and the state in the hot water storage tank 1 after taking out 650 kcal is shown in (e). become. Note that the temperature of the temperature intermediate layer gradually decreases. In FIG. 12, E is a temperature between 65 ° C. and 55 ° C., and G = 55 ° C. In FIG. 13, the temperature of the temperature intermediate layer is D = 62.3 ° C., E = 59.5 ° C., F = 56.8 ° C., and G = 55 ° C., respectively.

  On the other hand, in the state of the present embodiment shown in FIG. 5, the temperature of hot water is averaged in the small volume space 6 as in the example shown in FIG. Is not collapsed (a large temperature intermediate layer is not formed from the beginning of heat extraction as in the comparative example shown in FIGS. 12 and 13), and temperature stratification is performed on the large volume space 7 side. While maintaining the capacity, the capacity of the high temperature layer H gradually decreases as the amount of stored heat associated with heat extraction decreases.

  In the example of FIG. 5, the temperature of the temperature intermediate layer formed on the large volume space 7 side is very low if the amount of hot water taken out of the hot water storage tank 1 is 350 kcal or less. For example, in the figure, I = 23 ° C., J = 29 ° C., K = 34 ° C., L = 39 ° C. In the state up to FIG. 5C, the temperature of the temperature intermediate layer is less than 30 ° C. (FIG. 5 (a), no temperature intermediate layer, FIG. 5 (b), temperature intermediate layer I = 23 ° C., and FIG. 5 (c), temperature intermediate layer J = 29 ° C.). Therefore, not only the low temperature layer C in FIG. 5 (a) but also the water in the temperature intermediate layer (I or J) in FIG. 5 (b) or FIG. 5 (c) is used as the cooling water for the power generator as the heating element 2. It can be used, and there are no concerns about hygiene problems caused by the propagation of various bacteria.

  For example, even if the amount of hot water taken out from the hot water storage tank 1 exceeds 350 kcal, the temperature of the temperature intermediate layer is relatively low, and even in FIG. The temperature is 39 ° C. For this reason, the water of a temperature intermediate layer can be utilized as cooling water of a power generator. In addition, although the germs easily grow when the temperature of the water in the temperature intermediate layer is 30 ° C. or higher, the germs may be allowed to stand for 100 hours or longer at a temperature exceeding 30 ° C. (for example, less than 40 ° C.). is necessary. That is, even if the temperature of the temperature intermediate layer reaches 30 ° C. or higher, there is no concern about the problem of miscellaneous propagation in a short time, and there is a concern that it will be left for a long time such as 100 hours. In order to eliminate concerns, the following configuration may be provided.

  For example, in the example shown in FIG. 5, when a situation occurs in which the amount of heat extracted from the hot water storage tank 1 exceeds 350 kcal, for example, the next day and two days after the use (tomorrow , The day after tomorrow), for example, a means for confirming whether or not it will be absent is provided. For example, when the amount of hot water taken out from the hot water storage tank 1 is likely to exceed the usage amount of 350 kcal, this is notified by, for example, a remote control device, and the next day and two days after the use, whether or not there is a plan to use it is entered. The user is encouraged to do so by operating the remote control device, for example.

  If there is no user, the temperature intermediate layer water is used as cooling water during the power generation operation by the power generation device and decreases, and the amount of hot water in the high temperature layer H increases. There is no problem because it is used as cooling water before germs grow in the water of the layer and become a problem. Therefore, if it is not absent, the amount of hot water taken out from the hot water storage tank 1 is allowed to be taken out exceeding 350 kcal, and if it is absent, the hot water from the hot water storage tank 1 is removed. Heat extraction may be stopped.

  In this manner, even if a situation occurs in which the amount of hot water taken out from the hot water storage tank 1 exceeds 350 kcal, the next use occurs before the concern about the propagation of various germs occurs. There is no concern, and a heat source device that can be used more safely can be realized. In addition, since 4 days or more are required for the passage of 100 hours, the removal of hot water from the hot water storage tank 1 may be permitted when the absence period is within 4 days or within 3 days. If the heat extraction from the hot water storage tank 1 is stopped when it is absent for two days as described above, it is possible to further prevent the occurrence of miscellaneous germs.

  In addition, a means for learning the usage status of the user's power generation device may be provided, and it may be determined whether the usage is such that the user stays away for three days or more. If there is no such thing, even if the amount of heat extracted from the hot water storage tank 1 exceeds 350 kcal, it should be able to be used without worrying about the anxiety caused by the propagation of such bacteria. Although there is a possibility that it is not necessary to perform the control as described above, when the user is absent for more than three days, the user can input the fact by operating the remote control device, for example. Or may be left out of the remote control device at the initial use of the heat source device.

  In the example of FIG. 5, the temperature of the region L in FIG. 5 (e) is obtained as follows. Since this state is a state after the heat of 650 kcal is taken out, the total heat amount is 3750−650 = 3100 kcal, and when subtracting the heat amount of hot water of the high temperature layer H, 3100− (10 × 50) = 2600 kcal. The lower end of the partition 4 is located at a position of 120 liters from the top of the hot water storage tank 1, and water is stored from the position of 10 liters from the top of the hot water storage tank 1 (the lower end of the high temperature layer H) to the position of 120 liters (the lower end of the partition 4). 110 liters of water (in the region L) has a temperature that is higher than the temperature of the low temperature layer C and the feed water temperature by 15 ° C., so that 2600 ÷ 110 + 15 = 38.6 ° C. About 39 ° C.).

  In addition, this invention is not limited to the said Example, A various aspect can be taken in the range which does not deviate from the technical scope of this invention. For example, in the above embodiment, the partition 4 is formed of resin, but instead of forming the partition 4 of resin, for example, a heat-insulating resin is applied to the front and back surfaces of the metal plate or a resin film is provided. It can also be formed, or a plurality of metals can be stacked with a gap.

  The partition 4 provided in the hot water storage tank 1 extends in the vertical direction of the hot water storage tank 1 in the vicinity of the side wall of the hot water storage tank 1, and is divided into a large volume space chamber 7 and a small volume space chamber 6 that are partitioned by the partition 4. Are provided so as to communicate with each other on the upper end side and the lower end side of the partition 4, the interval between the partition 4 and the inside of the side wall of the hot water storage tank 1 and the arrangement mode of the partition 4 are not particularly limited and are appropriately set. For example, a cylindrical partition 4 as shown in FIGS. 3A to 3C may be used.

  The example shown in FIG. 3A is an example in which the bottom of the partition 4 is fixed to the bottom of the hot water storage tank 1, and FIG. 3B is provided with a protrusion 33 protruding outward from the partition 4. FIG. 3C shows an example in which the portion 33 is fixed to the inner surface of the side wall of the hot water tank 1 by spot welding or the like, and FIG. 3C provides the partition 4 in an eccentric shape in the hot water tank 1 so that the partition 4 and the inner wall of the hot water tank 1 are in contact. In this example, the portion 34 is fixed by welding or the like. In such a configuration in which welding is fixed, a thermistor may be provided in the hot water storage tank 1 corresponding to the fixing portion so that the temperature on the large volume chamber 7 side can be measured.

  When the partition 4 is formed in a cylindrical shape as in these examples, the small volume space chamber 6 and the large volume space chamber 7 partitioned by the partition 4 are communicated with each other between the upper end side and the lower end side of the partition 4. In order to do so, it is necessary to make the cylindrical partition 4 float in the hot water storage tank 1. Therefore, for example, as shown in FIG. 3A, when the bottom of the partition 4 is fixed to the bottom of the hot water storage tank 1, a hot water passage is formed by forming a through hole 40 on the lower side of the partition 4. For example, hot water may pass as shown by the arrows in the figure.

  Furthermore, in the said Example, although the hot water storage tank thermal connection heat exchanger 5 was provided in the side wall outer peripheral side of the hot water storage tank 1, the hot water storage tank thermal connection heat exchanger 5 and the hot water storage tank 1 inner peripheral wall in the hot water storage tank 1 are provided. It may be provided between the partition 4 and the hot water tank thermal connection heat exchanger 5 is provided in a remote position without being in contact with the outer peripheral wall of the hot water tank 1 and is thermally connected to the hot water tank 1. May be.

  Furthermore, the heating element 2 is not limited to a power generator, and may be a solar hot water unit, a heat pump unit, or the like.

  Furthermore, the auxiliary heat source device 27 does not necessarily have the heating circuit 25 but may have a reheating circuit so that the heat of the hot water in the hot water storage tank 1 can be used for the reheating, The detailed configuration of the auxiliary heat source device 27 is not particularly limited, and is set as appropriate.

  The heat source device of the present invention can be used as, for example, a household heat source device because the hot water in the hot water tank can be used for hot water supply, and the heat of the hot water can also be used for heating and the like.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Heat generating body 3 Heat source apparatus 4 Partition 5 Hot water storage tank thermal connection heat exchanger 6 Small volume space room 7 Large volume space room 8, 9 Passage 14 Hot water path 19 Hot water supply circuit 25 Heating circuit 27 Auxiliary heat source device 30, 31 End 33 Projection

Claims (2)

  A hot water storage tank for storing hot water heated by an externally arranged heating means, and a hot water passage for leading out the hot water stored in the hot water storage tank from the upper side of the hot water storage tank is provided; Is provided with a partition extending in the vertical direction of the hot water storage tank in the vicinity of the side wall of the hot water storage tank, and by the partition, the hot water storage tank has a small volume space chamber on the side wall side and a space other than the small volume space chamber. The large volume space chamber and the small volume space chamber are communicated with each other on the upper end side and the lower end side of the partition, and the hot water storage tank has heat of hot water in the hot water storage tank. A hot water storage tank thermal connection heat exchanger for taking out the outside is provided, and the hot water tank thermal connection heat exchanger is exchanged with the hot water stored in the small volume space chamber by heat exchange with the hot water stored in the small volume space chamber. It is configured to take out the heat of the hot water stored in the The partition is a block that blocks the influence of the disturbance of the temperature distribution of the hot water in the small-volume space chamber that occurs during the heat exchange operation by the hot water storage tank thermal connection heat exchanger from the hot water stored in the large-volume space chamber A heat source device characterized by forming a wall.   2. The heat source device according to claim 1, wherein the heating means is formed by a power generation device, and the power generation device is thermally connected to the hot water storage tank through a heat supply passage.

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