JP2008261560A - Hot water supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water supply device capable of supplying hot water to a plurality of houses with high equipment efficiency. <P>SOLUTION: This hot water supply device comprises a hot water storage tank 1, a heating means 2 for heating the water in the hot water storage tank 1, first and second hot water supply circuits 6, 7 formed in the hot water storage tank 1, first and second hot water supply circuit use setting means 15, 17 for setting whether each of the first and second hot water supply circuits 6, 7 is used or not, and a heating means controlling means 20 for switching a heating control method of the heating means 2 on the basis of contents set by the first and second hot water supply circuit use setting means 15, 17. As the use or not is set by every hot water supply circuit corresponding to each of the plurality of houses, and the control method of the heating means 2 is changed on the basis of the information, wasteful boiling-up of the hot water is prevented, and the equipment efficiency can be improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot water supply apparatus that has a hot water storage tank and supplies hot water to a plurality of households.

  Conventionally, this kind of hot water supply apparatus has a thing like FIG. 5, for example (for example, refer patent document 1).

  FIG. 5 is a configuration diagram of a conventional hot water supply apparatus described in Patent Document 1 described above.

As shown in FIG. 5, the hot water tank 1, the heating means 2 for heating the water in the hot water tank 1, and the hot water outlet 3 at the top of the hot water tank 1 are branched into a first household 4 and a second household 5. In the first hot water supply circuit 6 and the second hot water supply circuit 7 for supplying hot water to each of the first hot water supply circuit 6, the hot water from the hot water supply port 3 and the water supply from the water supply pipe 8 are mixed and desired. The first mixing valve 9 for setting the temperature, the first integrated flow meter 10 for measuring the amount of hot water flowing through the first hot water supply circuit 6, and the measurement result of the first integrated flow meter 10 at a preset amount of hot water A first shut-off valve 11 for shutting off the first hot water supply circuit 6 is reached, and the second hot water supply circuit 7 is mixed with hot water from the hot water supply port 3 and hot water from the water supply pipe 8 to obtain a desired value. A second mixing valve 12 for adjusting the temperature, a second flow meter 13 for measuring the amount of hot water flowing through the second hot water supply circuit 7, and the second flow meter 13 Are provided reaches the hot water to a constant result is set in advance and the second shut-off valve 14 for interrupting the second hot water supply circuit 7.
JP 2004-340457 A

  However, the configuration of the conventional hot water supply apparatus is effective as a means for allocating hot water to all households when the amount of hot water used by any household is large in a situation where the amount of hot water used by a plurality of households is disproportionate. On the other hand, there is no point about disparity in the situation where the total amount of hot water used by all households is small, such as when one of the multiple households supplying hot water is not occupying it at all. For example, if the amount of hot water for multiple households is stored in a hot water tank at midnight, the amount of heat released from the surface of the hot water tank 1 increases as a result of the remaining hot water remaining on that day, and the ratio of energy used to the input energy As a result, there is a problem that the device efficiency is greatly reduced.

  The present invention solves the above-described conventional problems, and in a configuration in which a plurality of households use hot water stored in a single hot water tank, a hot water supply apparatus capable of maintaining high efficiency even when the number of households is less than expected. The purpose is to provide.

  In order to solve the conventional problems, a hot water supply apparatus of the present invention includes a hot water storage tank, heating means for heating water in the hot water storage tank, a plurality of hot water supply circuits provided in the hot water storage tank, and the plurality of hot water supplies. Hot water supply circuit use setting means for setting whether to use each circuit, and heating means control means for switching the heating control method of the heating means based on the contents set by the hot water supply circuit use setting means In each hot water supply circuit corresponding to multiple households, whether or not to use is set, and the control method of the heating means is changed based on the information, so it is possible to suppress the boiling of useless hot water and improve the equipment efficiency. It becomes possible to improve.

The hot water supply apparatus of the present invention grasps the number of households using hot water by hot water supply circuit use setting means for setting whether or not to use each hot water supply circuit corresponding to a plurality of households, and stores hot water according to the number. It changes the amount of hot water to be heated in the tank and the operation control method of the heating means when adding water during use, so that when there are no tenants or long-term absence in multiple households, Before the situation where the raised hot water is not used, the amount of hot water to the hot water tank and the method of adding water can be changed in advance. .

  1st invention sets whether to use about each of a hot water storage tank, the heating means which heats the water of the said hot water tank, the some hot water supply circuit provided in the said hot water storage tank, and the said some hot water supply circuit Hot water supply circuit use setting means, and heating means control means for switching the heating control method of the heating means based on the contents set by the hot water supply circuit use setting means, each hot water supply circuit corresponding to a plurality of households Whether or not to use is set every time, and the control method of the heating means is changed based on the information, so that it is possible to suppress the boiling of useless hot water and improve the equipment efficiency.

  In the second invention, in particular, the hot water supply circuit use setting means of the first invention is provided corresponding to each of the plurality of hot water supply circuits, and sets whether or not each hot water supply circuit is used. A remote control installed in a household can be used as a hot water supply circuit usage setting means, so that the hot water supply circuit of that household can be set not to be used. In the case of no occupancy, the manager of the residence can perform setting work at the place of use, and mistakes are unlikely to occur.

  In the third invention, in particular, the hot water supply circuit use setting means of the first invention is provided for at least one hot water supply circuit and sets whether or not to use any hot water supply circuit. In an apartment house, the control panel provided in the management room can be used as a hot water supply circuit use setting means, so that the setting operation can be performed in a lump.

  According to a fourth aspect of the invention, in particular, the heating means control means according to any one of the first to third aspects of the invention is provided with a hot water storage tank according to the usage status of a plurality of hot water supply circuits set by the hot water supply circuit use setting means. By changing the amount of hot water stored, boiling the amount of hot water commensurate with the number of households used at that time can reduce the excess of hot water, reduce heat dissipation from the hot water storage tank, and increase equipment efficiency. It becomes possible.

  In particular, the fifth invention provides a plurality of temperature detection means in the vertical direction on the surface of the hot water tank of the fourth invention, and the heating means control means refers to the temperature detection means referred to based on the setting of the hot water supply circuit use setting means. For example, when all households use hot water, heating is performed until the temperature detecting means installed at the bottom of the hot water tank is hot water when all households use hot water. Operate the means to store a lot of hot water in the hot water tank, and if half of the households use the hot water, it is heated when the temperature detecting means provided at the intermediate height of the hot water tank detects the hot water. By stopping the operation of the means and not filling the hot water tank with hot water, the hot water amount corresponding to the number of households using hot water will be stored in the hot water tank, and unnecessary heat dissipation due to excess hot water will be suppressed. be able to.

In particular, the sixth invention provides at least one temperature detection means on the surface of the hot water storage tank of the fourth invention, and the heating means control means controls the heating means based on the setting of the hot water supply circuit use setting means. For example, when all households use hot water, the temperature detecting means installed at the lowermost part of the hot water tank is heated until it becomes hot water. When half of the households use hot water to store a large amount of hot water in the hot water tank and temporarily use the hot water, the heating means stops operating when the temperature detecting means detects a medium temperature. By not filling the hot water tank with hot water, the amount of hot water corresponding to the number of households to be used can be stored in the hot water tank, and wasteful heat dissipation due to excess hot water can be suppressed.

  The seventh aspect of the invention uses a heat pump cycle as the heating means of any one of the first to sixth aspects of the invention. It is possible to greatly reduce the problem that the efficiency is sometimes significantly reduced and to increase the efficiency of the device.

  An eighth invention is a supercritical refrigerant circuit in which the heat pump cycle of the seventh invention is a supercritical refrigerant circuit in which the pressure is equal to or higher than the critical pressure, and water is heated by the refrigerant whose pressure is increased to the critical pressure or higher. Since the temperature can be increased, the amount of heat that can be used can be increased, and the hot water prevention property can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
The hot water supply apparatus in the 1st Embodiment of this invention is demonstrated using FIGS. FIG. 1 is a configuration diagram of a hot water supply apparatus according to the present embodiment.

  In FIG. 1, a hot water supply apparatus in the present embodiment includes a hot water storage tank 1, a heating means 2 that includes a heat pump unit and heats the water in the hot water storage tank 1, and a hot water supply port 3 at the upper part of the hot water storage tank 1 to a first household 4. There are provided a first hot water supply circuit 6 and a second hot water supply circuit 7 which branch to the second household 5 and supply hot water to each.

  The first hot water supply circuit 6 is provided with a first mixing valve 9 that mixes hot water from the hot water supply port 3 and hot water from the water supply pipe 8 to a desired temperature, and the second hot water supply circuit 7 includes: A second mixing valve 12 is provided that mixes hot water from the hot water supply port 3 and water supplied from the water supply pipe 8 to a desired temperature. The first household 4 has a first home remote control 16 having a first hot water supply circuit use setting means 15, and the second household 5 has a second hot water supply circuit use setting means 17. A second home remote control 18 is installed, and the heating means 2 is controlled in the hot water supply apparatus body 19 based on the settings of the first hot water supply circuit use setting means 15 and the second hot water supply circuit use setting means 17. A control device 21 having a heating means control means 20 is provided.

  Furthermore, on the surface of the hot water tank 1, first temperature detection means 22 corresponding to detection of the water temperature in the lower part of the hot water tank 1, and second temperature detection corresponding to water temperature detection at an intermediate height in the hot water tank 1. Means 23 are provided.

  FIG. 2 is a block diagram of control of the hot water supply apparatus in the present embodiment.

  In FIG. 2, based on the setting contents of the first hot water supply circuit use setting means 15 and the second hot water supply circuit use setting means 17 and the outputs of the first temperature detection means 22 and the second temperature detection means 23, the heating means. The control unit 20 is configured to control the operation of the heating unit 2.

  About the hot water supply apparatus in this Embodiment comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

As a basic boiling operation, initially, the hot water tank 1 is filled with low temperature water, and when the operation is started, the low temperature water in the hot water tank 1 is transferred to the heat pump outlet by the boiling circulation pump 24. 25 is sent to the heating means 2, where it is heated and hot hot water is returned to the hot water tank 1 from the heat pump return port 26. Accordingly, hot water is stored in the hot water tank 1 sequentially from above.

  The amount of hot water stored is detected by the outputs of the first temperature detecting means 22 and the second temperature detecting means 23. When all the hot water is stored in the hot water tank 1, the first temperature is used. When the detection means 22 detects the high temperature, the heating means control means 20 stops the operation of the heating means 2 and if the middle of the hot water tank 1 is sufficient, the second temperature detection means 23 is Stop operation when hot water is detected. When using hot water after boiling, hot water in the hot water tank 1 is sent from the hot water inlet 3, and water corresponding to the amount of hot water used for hot water flows in from the water inlet 27 at the lower part of the hot water tank 1.

  Here, in the first household 4 and the second household 5, the first hot water supply circuit use setting means 15 and the second hot water supply circuit use setting are set by the first home remote controller 16 and the second home remote controller 18, respectively. Each operation according to the setting of the means 17 will be described.

  FIG. 3 shows setting screens of the first and second home remote controls 16 and 18. Setting is performed by selecting either “use” or “not use” with the upper and lower keys 16a at the bottom of the screen. For example, when “use” is selected for both the first household 4 and the second household 5, the amount of hot water to be boiled is the total amount of the hot water storage tank 1, and therefore the heating means control means 20 has the first temperature. The heating means 2 is operated until the detection means 22 detects hot water.

  For example, when the heating temperature in the heating unit 2 is 85 ° C., the operation is continued until the first temperature detection unit 22 detects a temperature of 60 ° C.

  Further, when “not use” is selected only for the second household 5, the amount of hot water to be boiled is half that of the hot water tank 1, so that the heating means control means 20 causes the second temperature detection means 23 to be hot water. For example, in the above temperature example, when 60 ° C. is detected, the operation of the heating means 2 is stopped.

  As described above, since the amount of hot water stored in the hot water tank 1 can be changed according to the number of households used, excess hot water can be suppressed, and as a result, the heat dissipation from the hot water tank 1 can be reduced, improving the efficiency of the equipment. Can be made. In addition, in the next boiling, due to the characteristics of the heat pump unit 2, the efficiency of re-boiling of excess hot water is lower than that of boiling low-temperature water. In addition to heat dissipation from 1, a great effect can be obtained.

  The refrigeration cycle of the heating means 2 is preferably operated at a pressure exceeding the critical pressure using carbon dioxide as the refrigerant. Since the boiling temperature can be increased by using carbon dioxide as a refrigerant, it is possible to increase the amount of heat that can be used and to prevent the hot water from running out.

(Embodiment 2)
FIG. 4 is a block diagram of control of the hot water supply apparatus according to the second embodiment of the present invention, and FIG. 5 is a view showing a setting screen of hot water supply circuit use setting means of the hot water supply apparatus.

  4 and 5, the difference between the hot water supply apparatus in the present embodiment and the hot water supply apparatus in the first embodiment is that the heating means control means 20 determines whether the heating means 2 is stopped. In the water temperature detection, only the first temperature detection means 22 and the use of the hot water supply circuit are set only by one first hot water supply circuit use setting means 30. Since it is the same as the hot water supply apparatus in the first embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted.

The operation of the hot water supply apparatus configured as described above will be described below. Using the screen of the first hot water supply circuit use setting means 30 as shown in FIG. 5, both the first household 4 and the second household 5 are used. In the case of “use” setting, the operation is the same as that of the first embodiment. However, when only one household, for example, the second household 5 is set to “not use”, the heating means control means 20 When the detected temperature of the first temperature detection means 22 is detected at a lower temperature, for example, 40 ° C., the operation of the heating means 2 is stopped. As a result, a smaller amount of hot water is stored in the hot water tank 1, and the amount of hot water can be adjusted according to the number of households used, so that the same effect as in the first embodiment can be obtained.

  As described above, when the hot water supply apparatus according to the present invention supplies hot water to a plurality of households, the amount of stored hot water increases or decreases depending on the number of households actually used. In addition, it can be applied to large-scale uses such as business use in a system having a heat source and a hot water tank.

Configuration diagram of hot water supply apparatus in Embodiment 1 of the present invention Block diagram of control of the water heater The figure which showed the setting screen of the hot water supply circuit use setting means of the hot water supply apparatus Block diagram of control of hot water supply apparatus in Embodiment 2 of the present invention The figure which showed the setting screen of the hot water supply circuit use setting means of the hot water supply apparatus Configuration diagram of conventional hot water supply equipment

Explanation of symbols

1 Hot water storage tank 2 Heating means 6 First hot water supply circuit (hot water supply circuit)
7 Second hot water supply circuit (hot water supply circuit)
15, 30 First hot water supply circuit use setting means (hot water supply circuit use setting means)
17 Second hot water supply circuit use setting means (hot water supply circuit use setting means)
20 Heating means control means 22 First temperature detecting means (temperature detecting means)
23 Second temperature detection means (temperature detection means)

Claims (8)

Hot water storage tank, heating means for heating water in the hot water storage tank, a plurality of hot water supply circuits provided in the hot water storage tank, and a hot water supply circuit use setting means for setting whether to use each of the plurality of hot water supply circuits And a hot water supply apparatus comprising heating means control means for switching the heating control method of the heating means based on the contents set by the hot water supply circuit use setting means. The hot water supply apparatus according to claim 1, wherein the hot water supply circuit use setting means is provided corresponding to each of the plurality of hot water supply circuits and sets whether to use each hot water supply circuit. The hot water supply apparatus according to claim 1, wherein at least one hot water supply circuit use setting means is provided for a plurality of hot water supply circuits and sets whether or not to use any hot water supply circuit. The hot water supply according to any one of claims 1 to 3, wherein the heating means control means is configured to change the amount of hot water stored in the hot water storage tank in accordance with the use status of the plurality of hot water supply circuits set by the hot water supply circuit use setting means. apparatus. A plurality of temperature detection means are provided in the vertical direction on the surface of the hot water tank, and the heating means control means is configured to control the heating means by changing the temperature detection means to be referred to based on the setting of the hot water supply circuit use setting means. Item 5. A water heater according to item 4. A structure in which at least one temperature detection means is provided on the surface of the hot water tank, and the heating means control means changes the threshold value of the temperature detected by the temperature detection means for controlling the heating means based on the setting of the hot water supply circuit use setting means. The hot water supply apparatus according to claim 4. The hot-water supply apparatus of any one of Claims 1-6 which used the heat pump cycle as a heating means. The hot water supply apparatus according to claim 7, wherein the heat pump cycle is a supercritical refrigerant circuit in which the pressure is equal to or higher than a critical pressure, and water is heated by a refrigerant whose pressure is increased to the critical pressure or higher.

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