JP5121548B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to a hot water storage type water heater.

  In hot water storage water heaters that store hot water obtained by heating water with a heat source device such as a heat pump or a heater in a hot water storage tank and supply hot water from the hot water storage tank to a desired location via a hot water supply line, generally one day Of these, the capacity of the hot water storage tank is often designed assuming the amount of hot water used in a predetermined time zone. When the amount of hot water used within a predetermined time zone exceeds the design capacity of the hot water storage tank, no hot water remains in the hot water storage tank (so-called “hot water out”). When the hot water runs out, the user may not be able to receive hot water supply at a desired temperature until a predetermined amount of hot water is boiled after the boiling operation is performed to boil water into hot water. In order to improve the convenience for the user, various ideas for preventing hot water shortage have been made.

  For example, Patent Document 1 includes a remaining hot water amount detecting means for detecting the amount of remaining hot water in a hot water storage tank, and a bathtub hot water heating means for heating hot water in a bathtub by heat exchange with hot water stored in the hot water storage tank. There is described a hot water storage type hot water supply apparatus that performs boiling operation because there is a possibility that hot water may run out when the amount of hot water in the tank is equal to or less than a predetermined amount of hot water and the bathtub hot water heating means is operating. Further, Patent Document 2 includes a remaining hot water temperature detector that detects the amount of remaining hot water in the hot water storage tank and bath hot water filling means for supplying hot water to the bathtub, and is necessary for the remaining hot water amount and hot water filling in the hot water storage tank. There is described a hot water storage type hot water supply apparatus that performs boiling operation because there is a risk of running out of hot water when it is determined that the amount of heat in the hot water storage tank is insufficient when the amount of heat in the hot water storage tank is compared.

Japanese Patent Laid-Open No. 2004-245459 JP 2006-170553 A

  In the hot water storage type hot water heater described in Patent Document 1, the hot water runs out only when the two conditions that the amount of hot water in the hot water storage tank is equal to or less than the predetermined amount of hot water and that the bathtub hot water heating means are operating are satisfied. Since it is determined that there is a risk of occurrence, hot water may run out when a large amount of hot water is continuously consumed at a hot water supply destination other than the bathtub. In addition, when the time for operating the bath hot water heating means may be short, that is, even if the hot water in the hot water storage tank can be covered without the boiling operation, the hot water amount in the hot water storage tank is less than the predetermined hot water amount. Since the boiling operation is started, the operation efficiency may be unnecessarily lowered.

  Further, in the hot water storage type water heater described in Patent Document 2, if it is determined that the amount of hot water in the hot water storage tank is smaller than the amount of heat necessary for bathing, even if the user does not want to fill the bath Since boiling operation is started in preparation for running out of hot water, operation efficiency may be unnecessarily lowered.

  This invention is made | formed in view of said situation, and it aims at obtaining the hot water storage type hot water supply machine which is easy to prevent hot water shortage efficiently.

  The hot water storage type water heater of the present invention that achieves the above-described object includes a boiling operation in which water is boiled into hot water by a heat source device and stored in a hot water storage tank, and the hot water stored in the hot water storage tank is supplied through a hot water supply pipe through a predetermined temperature line. A hot water storage type hot water supply system in which a control device controls a hot water supply operation to be supplied to a hot water supply destination, and a hot water storage heat amount information collecting unit that collects information related to the amount of hot water stored in the hot water storage tank, and hot water supply per unit time at the hot water supply destination It includes a heat usage information collection unit that collects information related to heat usage, and a hot water flow rate regulator that adjusts the flow rate of hot water supplied to the hot water supply line in the hot water supply pipeline. Predicting the remaining time until hot water runs out during hot water operation based on the hot water storage calorie calculated using the information obtained and the hot water usage calorie calculated using the information collected by the heat usage information collection unit, When the remaining time reaches a predetermined time And performing hot water shortage prevention operation to raise boiling water in hot water in the heat source apparatus with adjusting the hot water flow to the hot water supply destination by the hot water flow regulator.

  The hot water storage type water heater of the present invention predicts the remaining time until hot water breaks out based on the amount of stored hot water in the hot water storage tank and the amount of hot water used at the hot water supply destination, and when the remaining time reaches a predetermined time Compared with the case where the hot water prevention operation is performed only by the amount of hot water in the hot water storage tank without predicting the remaining time as described above, the hot water shortage prevention operation is performed without unnecessary boiling. It is easy to prevent. Since the hot water outflow prevention operation is performed in accordance with the user's hot water supply demand, the hot water storage type hot water heater of the present invention can easily prevent hot water shortage efficiently.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a hot water storage type water heater of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment.

Embodiment 1 FIG.
FIG. 1 is a schematic view showing an example of a hot water storage type hot water supply apparatus of the present invention. The hot water storage type water heater 100 shown in the figure has a function of boiling low-temperature water such as city water into hot water with a heat source device and supplying hot water to a hot water supply destination. The heat pump unit H, the boiling circulation line 10, hot water storage A tank 20, a water supply line 30, a hot water supply line 40, a boiling heat amount information collecting unit DG ₁ , a hot water storage heat amount information collecting unit DG ₂ , a used heat amount information collecting unit DG ₃ , and a control device 60 are provided. Hereinafter, each component of the hot water storage type water heater 100 will be described.

  The heat pump unit H is a heat source machine that boils water into hot water. The heat pump unit H has a heat exchanger (not shown), and water that has flowed into the boiling circulation line 10 from the lower part of the hot water storage tank 20 is heated to hot water by the heat exchanger and returned to the hot water storage tank 20. The heat pump unit H operates using a refrigerant such as carbon dioxide or chlorofluorocarbon.

  The boiling circulation pipe 10 is a pipe that takes water from the lower part of the hot water storage tank 20 and returns the hot water boiled to the hot water storage tank 20 from the upper part of the hot water storage tank 20. A pump P, a water flow rate detector 13, a water temperature detector 14, and a hot water temperature detector 15 are included. The forward pipe 11 connects the lower part of the hot water storage tank 20 and a heat exchanger (not shown) in the heat pump unit H, and the return pipe 12 connects the heat exchanger and the upper part of the hot water storage tank 20. A circulation pump P is provided in the middle of the forward pipe 11, and a water flow rate detector 13 and a water temperature detector 14 are provided in this order on the downstream side of the circulation pump P. A hot water temperature detector 15 is provided in the middle of the return pipe 12.

The water flow rate detector 13 detects the flow rate of the water flowing in the forward pipe 11, the water temperature detector 14 detects the temperature of the water flowing in the forward pipe 11, and the hot water temperature detector 15 flows in the return pipe 12. Detect the temperature of hot water. Each of the water flow rate detector 13, the water temperature detector 14, and the hot water temperature detector 15 has a boiling heat quantity information collecting unit DG ₁ that collects information related to the boiling heat quantity per unit time in the heat pump unit H. It is configured and connected to the control device 60 by wire or wireless, and the detection result is transmitted to the control device 60.

The hot water storage tank 20 stores water supplied from the water supply pipe 30 and stores hot water boiled by the heat pump unit H, and is always kept in a full water state. During operation of the hot water storage type water heater 100, temperature stratification is formed in the hot water storage tank 20. The hot water storage tank 20 is provided with a plurality of hot water storage temperature sensors 20a, 20b, 20c, and 20d distributed in the height direction of the hot water storage tank 20. The mounting heights of the hot water storage temperature sensors 20a, 20b, 20c, and 20d are different from each other. Individual hot water storage temperature sensor 20a, 20b, 20c, 20d constitute a hot water storage heat information collection unit DG ₂ for collecting information relating to the hot water storage heat in the hot water storage tank 20 is connected by wire or wirelessly to the control device 60, The detection result is transmitted to the control device 60.

  The water supply line 30 is a line for supplying low-temperature water such as city water to the hot water storage tank 20 and a three-way valve 41 described later. The first water supply line 30a, the second water supply line 30b, and the third water supply line. It includes a part 30c, a pressure reducing valve 31 for reducing the water pressure to a predetermined value or less, and a water temperature detector 32. The first water supply pipe section 30 a connects a water source (not shown) such as a water supply and the pressure reducing valve 31, and the second water supply pipe section 30 b connects the pressure reducing valve 31 and the lower part of the hot water storage tank 20. The third water supply pipe section 30 c branches from the second water supply pipe section 30 b and connects the second water supply pipe section 30 b and the three-way valve 41. The water temperature detector 32 is provided in the middle of the third water supply conduit 30c that supplies water to the three-way valve 41, and detects the temperature of the water flowing in the third water supply conduit 30c. The water temperature detector 32 is connected to the control device 60 by wire or wirelessly, and transmits the detection result to the control device 60.

  The hot water supply pipe 40 is a pipe for supplying the hot water stored in the hot water storage tank 20 to a predetermined hot water supply destination. The first hot water supply pipe section 40a, the second hot water supply pipe section 40b, the three-way valve 41, the hot water temperature detection. A hot water supply temperature detector 43, a hot water supply flow rate detector 44, and a hot water supply flow rate adjuster 45. The first hot water supply line 40a connects the upper part of the hot water storage tank 20 and the three-way valve 41, and the second hot water supply line 40b connects the three-way valve 41 and a predetermined hot water supply destination.

  The three-way valve 41 is a valve for adjusting the flow rates of the hot water in the first hot water supply pipe section 40a and the water in the third hot water supply pipe section 30c to flow to the second hot water supply pipe section 40b. The first hot water supply pipe section 40a and the third water supply pipe line section 30c are connected to the two inlets located in the second outlet, and the second hot water supply pipe section 40b is connected to the outlet on the downstream side. The three-way valve 41 is connected to the control device 60 by wire or wirelessly, and its operation is controlled by the control device 60 during a hot water supply operation.

  The hot water temperature detector 42 is provided on the upstream side of the three-way valve 41 in the first hot water supply pipe section 40a, and detects the temperature of the hot water flowing into the three-way valve 41. The hot water temperature detector 42 is connected to the control device 60 by wire or wirelessly, and transmits the detection result to the control device 60.

  A hot water supply temperature detector 43, a hot water supply flow rate detector 44, and a hot water supply flow rate adjuster 45 are provided in this order from the upstream side of the second hot water supply pipe portion 40b in the middle of the second hot water supply pipe portion 40b. It has been. The hot water temperature detector 43 detects the temperature of the hot water flowing through the second hot water supply pipe section 40b, the hot water flow rate detector 44 detects the flow rate of the hot water flowing through the second hot water supply pipe section 40b, and the hot water flow rate adjuster 45. Adjusts the flow rate of hot water flowing through the second hot water supply pipe section 40b.

The hot water supply temperature detector 43 and the hot water supply flow rate detector 44 constitute a use heat amount information collecting unit DG ₃ that collects information related to the use amount of hot water supply per unit time at the hot water supply destination, and is wired or wirelessly connected to the control device 60. It is connected and the detection result is transmitted to the control device 60. Further, the hot water supply flow rate regulator 45 is connected to the control device 60 by wire or wirelessly, and the operation is controlled by the control device 60. The hot water temperature detected by the hot water supply temperature detector 43 substantially corresponds to the hot water supply temperature at the hot water supply destination, and the hot water flow rate detected by the hot water supply flow rate detector 44 corresponds to the hot water supply flow rate at the hot water supply destination. The hot water flow rate adjuster 45 adjusts the hot water flow rate at the hot water supply destination.

  The control device 60 includes a device main body 61 and a remote controller 62, and the device main body 61 includes a control unit 61a and a storage unit 61b. The controller 61 a is a boiling operation in which water is heated to hot water by the heat pump unit H and stored in the hot water storage tank 20 based on information stored in the storage unit 61 b or information or instructions input by the user from the remote controller 62. And a hot water supply operation for supplying hot water stored in the hot water storage tank 20 to a predetermined hot water supply destination via the hot water supply pipe 40 and a hot water shortage prevention operation described later.

  Information stored in the storage unit 61b includes, for example, the transmission cycle of detection results from the hot water storage temperature sensors 20a to 20d, the mounting heights of the hot water storage temperature sensors 20a to 20d, and the hot water storage amount in the hot water storage tank 20. Information on the correspondence between the two, and a condition value that triggers the start of the hot water prevention operation. The information is stored in advance in the storage unit 61b by, for example, the manufacturer of the hot water storage type hot water heater 100.

  On the other hand, the information input from the remote controller 62 includes, for example, information designating a boiling start time, a boiling temperature, a boiling water amount, a hot water supply temperature, and the like. Examples of the command input from the remote controller 62 include a command for instructing a hot water supply temperature change, a boiling operation stop, a boiling water amount change, and the like.

  The hot water storage type hot water heater 100 having the above-described configuration performs a boiling operation, a hot water supply operation, and a hot water prevention operation under the control of the control unit 61a. Hereinafter, each of the boiling operation, the hot water supply operation, and the hot water run prevention operation will be described.

  The boiling operation is started at the above-described boiling start time. Under the control of the control unit 61a, the heat pump unit H and the circulation pump P are activated and the water in the hot water storage tank 20 flows into the boiling circulation pipe 10, and the water is boiled to a predetermined boiling temperature by the heat pump unit H. The hot water is raised to become hot water, and the hot water is returned from the upper part of the hot water storage tank 20 to the hot water storage tank 20. As time elapses from the start of the boiling operation, the hot water returned to the upper part of the hot water storage tank 20 expands the hot water layer from the top side to the bottom side in the hot water storage tank 20. During the boiling operation and the hot water prevention operation, the hot water temperature in the hot water storage tank 20 is periodically detected by the hot water storage temperature sensors 20 a to 20 d, for example, and the detection result is transmitted to the control device 60.

Control unit 61a, the detection results of the stored hot water temperature sensors 20a~20d constituting the hot water storage heat information collection unit DG _2, each mounting height and the hot water storage tank 20 of the hot-water storage temperature sensor 20a~20d stored in the storage unit 61b The amount of hot water stored in the hot water storage tank 20 is calculated, for example, periodically using information on the correspondence relationship with the amount of stored hot water. The hot water storage type hot water heater 100 can be configured to calculate the amount of stored hot water only in each of the hot water supply operation and the hot water prevention operation, or during the boiling operation, the hot water operation, and the hot water prevention operation. It is also possible to configure the hot water storage type water heater 100 so as to calculate the amount of stored hot water in each of the above.

  When the controller 61a determines that the hot water storage amount calculated from the hot water storage heat amount has reached the boiling hot water amount designated by the user, or the detection result of a predetermined hot water storage temperature sensor 20a to 20d is When the value exceeds the condition value, the heat pump unit H and the circulation pump P are stopped under the control of the control unit 61a, and the boiling operation is finished. In addition, said condition value is stored in the memory | storage part 61b previously by the manufacturer of the hot water storage type hot water supply apparatus 100. FIG.

  The hot water supply operation is started when the hot water tap connected to the second hot water supply pipe section 40b is opened. The control unit 61a uses the detection results of the water temperature detector 32, the hot water temperature detector 42, and the hot water temperature detector 43 so that the hot water temperature at the hot water supply destination becomes the temperature set by the user. Control the behavior.

When a predetermined time elapses from the start of the hot water supply operation, the control unit 61a periodically calculates, for example, the amount of hot water used and the amount of stored hot water per unit time at the hot water supply destination described above, and calculates the amount of stored hot water and the amount of used hot water. Whether or not the remaining time until hot water runs out (hereinafter referred to as “hot water running time”) is predicted, and whether or not the hot water running time satisfies the above-described conditions, that is, the conditions for starting the hot water prevention operation Judging. The time from the start of the hot water supply operation to the calculation of the hot water use heat amount or the hot water storage heat amount is set in advance by the manufacturer of the hot water storage hot water supply device 100, and the information is stored in the storage unit 61b. Also, hot water use amount of heat per unit time in the hot water supply destination is calculated by using the hot water temperature detector 43 and the hot water flow rate detector 44 of each detection result constitutes a running calorie information collection unit DG _3.

  The hot water prevention operation is started when the control unit 61a determines that the above condition is satisfied. For example, when the predicted hot water run-out time is less than the maximum allowable value, the control unit 61a determines that the above condition is satisfied, and the hot water run-off prevention operation is started. When the hot water shortage prevention operation is started, the hot water supply flow rate adjuster 45 is operation-controlled under the control of the control unit 61a, and the hot water supply flow rate at the hot water supply destination is adjusted. Specifically, the hot water supply flow rate is reduced. Further, the heat pump unit H and the circulation pump P are activated, and the boiling operation is started.

The hot water supply flow rate at the hot water supply destination can be adjusted so that the hot water supply flow rate becomes a reduction amount or reduction rate fixed in advance, or can be adjusted as appropriate according to the amount of boiling heat in the heat pump unit H. it can. Water storage type water heater 100 shown in FIG. 1, since it has a heating-up heat quantity information collecting unit DG ₁ described above, water flow rate detector 13, the water temperature detector constituting the heating-up heat quantity information collecting unit DG ₁ 14 and the hot water temperature detector 15 are used to calculate the amount of boiling heat in the heat pump unit H, so that the amount of heat used for hot water supply at the hot water supply destination is less than or equal to the amount of boiling heat. Adjust the flow rate. The storage unit 61b stores in advance information representing the correspondence relationship between the hot water supply temperature and the hot water supply flow rate at the hot water supply destination and the boiling heat amount by the manufacturer of the hot water storage type hot water heater 100.

  For example, the controller 61a periodically predicts the hot water outage time during the hot water prevention operation and determines whether or not the predicted hot water outtime satisfies the above-described conditions, and hot water supply to the hot water supply destination is stopped. When it is determined that it has been determined, or when the predicted hot water run-out time does not satisfy the above-described conditions, the hot water run-off prevention operation is terminated. The determination that the hot water supply to the hot water supply destination has been stopped may be performed, for example, when the detection result by the hot water supply flow rate detector 44 becomes zero, or the detection result by the hot water supply flow rate detector 44 is predetermined. You may carry out when it becomes zero for more than time. The above time is selected, for example, by the manufacturer of the hot water storage type hot water heater 100 and stored in the storage unit 61b in advance.

  In the hot water storage type water heater 100 configured as described above, the controller 61a predicts the above-mentioned hot water run-off time, and performs the hot water run-off prevention operation only when the hot water run-off time satisfies a predetermined condition. Compared to the case where the hot water shortage prevention operation is performed only by the amount of hot water in the hot water storage tank 20 without predicting the hot water, it is easy to prevent the hot water shortage without performing unnecessary boiling operation. Since the hot water outflow prevention operation is performed according to the user's hot water supply demand, the hot water storage type hot water heater 100 can easily prevent hot water outage efficiently.

  As a result of facilitating efficient prevention of hot water shortage, the hot water storage type water heater 100 can save energy and reduce the number of unnecessary boiling operations by efficiently performing the boiling operation. Therefore, the product life can be extended. Further, by performing the boiling operation according to the user's hot water supply demand, it is not necessary to increase the size of the hot water storage tank 20 and store hot water in preparation for a case where the user's hot water supply demand is large. Can do.

  Operation control and processing by the control unit 61a in the hot water storage hot water heater 100 that exhibits the above-described technical effect, particularly operation control and processing related to hot water prevention operation can be performed under various procedures. A specific example of operation control and processing performed by the control unit 61a for preventing hot water shortage will be described below with reference to FIG. 2 while appropriately quoting the reference numerals used in FIG.

  FIG. 2 is a flowchart schematically showing an example of operation control and processing performed by the control unit in order to prevent hot water from running out in the hot water storage type water heater shown in FIG. In the example illustrated in FIG. 2, the control unit 61 a (see FIG. 1) performs each process of steps S <b> 101 to S <b> 110 in order to prevent running out of hot water in the hot water storage type water heater 100.

Step S101 that is performed first is a step that is performed after a predetermined time has elapsed since the start of the hot water supply operation. In Step S101, the hot water storage tank 20 is based on information obtained from the hot water storage heat amount information collection unit DG ₂ (see FIG. 1). The amount of stored hot water R is calculated. In the next step S102, the hot water use heat quantity Vs per unit time at the hot water supply destination is calculated based on the information obtained from the use heat quantity information collecting unit DG ₃ (see FIG. 1). In step S103, the hot water storage heat amount R calculated in step S101 is divided by the hot water supply use heat amount Vs calculated in step S102, thereby calculating a hot water run-out time T that is the remaining time until hot water runs out.

Thereafter, the process proceeds to step S104, where the condition value T ₀ which is information stored in the storage unit 61b (see FIG. 1), that is, the hot water run time T calculated in step S103 is smaller than the maximum allowable value of the hot water run time. It is determined whether or not (T <T ₀ ). When it is determined in step S104 that the hot water run-out time T is smaller than the condition value T0 (T <T ₀ ), that is, the hot water run-out time T is less than the condition value T ₀ , the process proceeds to step S105 and the hot water storage hot water heater 100 is boiled. It is determined whether or not the vehicle is driving. When it is determined in step S104 that the hot water run time T is not less than the condition value T ₀ (T ≧ T ₀ ), that is, the hot water run time T is greater than or equal to the condition value T ₀ , the process proceeds to step S109.

When it is determined in step S105 that the hot water storage type hot water heater 100 is in the boiling operation, the process proceeds to step S106, and the heat pump unit H operates in accordance with the information obtained from the boiling heat amount information collecting unit DG ₁ (see FIG. 1). The boiling heat amount Vb per unit time is calculated. When it is determined in step S105 that the hot water storage type hot water heater 100 is not in the boiling operation, the process proceeds to step S107, and operation control is performed so that the hot water storage type hot water heater 100 starts the boiling operation. When the boiling operation is started in step S107, the process proceeds to step S106.

  When the boiling heat amount Vb is calculated in step S106, the process proceeds to step S108, and operation control of the hot water supply flow rate regulator 45 (see FIG. 1) is performed so that the hot water use heat amount Vs at the hot water supply destination is about the boiling heat amount Vb or less. Adjust the hot water flow rate at the hot water supply destination. When the hot water supply flow rate is adjusted in step S108, the process proceeds to step S109, and it is determined whether or not the hot water storage type hot water heater 100 is in a hot water supply operation.

  When it is determined in step S109 that the hot water storage type hot water heater 100 is in a hot water supply operation, the process returns to step S101 and the above procedure is repeated. When it is determined in step S109 that the hot water storage type hot water heater 100 is not in the hot water supply operation, the process proceeds to step S110, and the operation control of the hot water supply flow rate adjuster 45 (see FIG. 1) is terminated, thereby adjusting the hot water supply flow rate at the hot water supply destination. Exit. Specifically, the valve opening degree of the hot water supply flow rate regulator 45 is set to a fully open state or a fully closed state. When the adjustment of the hot water supply flow rate at the hot water supply destination is finished in step S110, the operation control and processing for preventing hot water shortage are finished.

Embodiment 2. FIG.
Among the hot water storage type hot water heaters according to the present invention, a heat pump unit provided as a heat source unit can constitute a boiling heat amount information collecting unit without including a water flow rate detector. As a specific example of the hot water storage type water heater provided with such a boiling heat quantity information collecting unit, for example, there is a configuration in which the water flow rate detector 13 in the hot water storage type water heater 100 shown in FIG. 1 is omitted.

  The boiling heat amount information collecting unit in the hot water storage type hot water heater includes, for example, a water temperature detector 14, a hot water temperature detector 15, and a circulation pump P (see FIG. 1). Further, the control device uses an input value (for example, the rotation speed or output value of the circulation pump P) related to the flow rate control of the circulation pump P during the hot water prevention operation, so that the forward pipe 11 (see FIG. 1). The flow rate of water flowing inside is calculated, and the amount of boiling heat per unit time in the heat pump unit H (see FIG. 1) is calculated using the flow rate and the detection results of the water temperature detector 14 and the hot water temperature detector 15. Ask. By calculating the flow rate of water in the forward pipe 11 using the input value of the circulation pump P, the water flow rate detector 13 (see FIG. 1) becomes unnecessary, and therefore, compared with the hot water storage type water heater 100 shown in FIG. Thus, the number of detectors can be reduced.

Embodiment 3 FIG.
The hot water storage type hot water supply apparatus of the present invention can be added with a function for the control device to update the conditions for determining whether or not to perform the hot water prevention operation according to the user's hot water supply demand. The configuration of the hot water storage type hot water heater to which the function is added can be the same as the configuration of the hot water storage type hot water heater described in the first embodiment or the second embodiment except for the function of the control device. The illustration is omitted.

In the hot water storage type water heater to which the above function is added, every time a hot water supply operation is performed, the control unit of the control device stores the total amount of heat used in the hot water supply destination in the storage unit, and every predetermined period, for example, every week The maximum value of the total hot water use heat consumption is obtained. Total hot water use heat in hot water destination, the control unit described above is calculated using the information collected for example by the use calorimetry information collection unit DG _3. The control unit is previously provided with a timekeeping function as necessary. When the above maximum value is updated, the conditions that trigger the start of the hot water prevention operation, for example, the maximum allowable value of the hot water time are set to the maximum value so that the hot water does not run out in one hot water supply operation. The control unit changes accordingly.

  FIG. 3 is a flowchart schematically showing an example of operation control and processing performed by the control unit in order to prevent running out of hot water in a hot water storage type water heater to which the above function is added. In the example shown in the figure, each of new steps S103a and S103b is performed between step S103 and step S104 shown in FIG. 2, and a new step S110a is executed after step S110 shown in FIG. Each of the steps shown in FIG. 3 that are the same as those shown in FIG. 2 are denoted by the same reference numerals as those used in FIG. 2 and description thereof is omitted, and only differences are described below. To do.

After calculating the hot water run-off time T in step S103, the control unit reads out the maximum value Vmax of the total hot water supply use heat amount from the storage unit, and the condition value T ₀ that triggers the start of the hot water prevention operation, for example, the maximum hot water run time Determine whether the tolerance value needs to be changed. For example, when the maximum value Vmax is larger than the hot water storage heat amount R, it is determined that the condition value T ₀ needs to be changed, and when the hot water storage heat amount R is equal to or greater than the maximum value Vmax, the above condition value T ₀ is changed. Judge that there is no need to do.

If it is determined in step S103a that the condition value T ₀ needs to be changed, the process proceeds to step S103b, where the condition value T ₀ is changed so that hot water does not run out in one hot water supply operation. Specifically, the numerical value of the condition value T ₀ is increased. How much to increase is preset by the manufacturer of the hot water storage type hot water heater. When the condition value T ₀ is changed in step S103b, the process proceeds to step S104. If it is determined that there is no need to change the condition value T ₀ in the previous step S103a, the flow proceeds to step S104.

  On the other hand, when the adjustment of the hot water supply flow rate is completed in step S110, the process proceeds to step S110a to calculate the total hot water use heat quantity, and after storing the information of the total hot water use heat quantity in the storage unit, the process is finished.

  As mentioned above, although the hot water storage type hot water heater of the present invention has been described with reference to the embodiment, the present invention is not limited to the above-described form as described above. For example, FIG. 1 shows a hot water storage water heater 100 that sends hot water stored in the hot water storage tank 20 to a predetermined hot water supply destination. However, the hot water storage water heater of the present invention temporarily stores hot water boiled by a heat source device. And what is necessary is just to supply the heat | fever of the stored hot water to a predetermined location, The structure can be changed suitably. For example, a heater can be used as the heat source device, and in this case, the heater is disposed in the hot water storage tank. Moreover, the hot water storage type hot water supply machine with the reheating function which takes in the bath water in a bathtub, heats the said bath water with the heat of the hot water stored in the hot water storage tank, and returns it to a bathtub may be sufficient.

  The hot water storage heat amount information collection unit, the used heat amount information collection unit, and the boiling heat amount information collection unit may be any devices that can obtain information necessary for calculating a desired heat amount, and the configurations thereof can be changed as appropriate. It is also possible to configure the hot water storage type hot water heater so that the user can set the maximum value of the total hot water supply use heat amount described in the third embodiment from a remote controller. The control unit has a display unit that can display each numerical value so that the user can easily check the hot water storage heat amount R, the hot water use heat amount Vs, the hot water running time T, the boiling heat amount Vb, and the like shown in FIG. May be provided. The hot water storage type water heater of the present invention can be variously modified, modified, combined, etc. in addition to those described above.

  The hot water storage type water heater of the present invention is suitable as a hot water storage type hot water heater for home use or business use.

It is the schematic which shows an example of the hot water storage type water heater of this invention. It is a flowchart which shows roughly an example of the operation control and process which a control part performs in order to prevent hot water shortage with the hot water storage type water heater shown in FIG. It is a flowchart which shows roughly the other example of the operation control and process which a control part performs in order to prevent hot water shortage with the hot water storage type water heater of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Boiling circulation line 11 Outgoing pipe 12 Return pipe 13 Water flow rate detector 14 Water temperature detector 15 Hot water temperature detector 20 Hot water storage tank 20a, 20b, 20c, 20d Hot water storage temperature sensor 30 Water supply line 30a 1st water supply line Section 30b Second water supply pipe section 30c Third water supply pipe section 31 Pressure reducing valve 32 Water temperature detector 40 Hot water supply pipe 40a First hot water supply pipe section 40b Second hot water supply pipe section 41 Three-way valve 42 Hot water temperature detector 43 Hot water supply temperature detector 44 Hot water supply flow rate detector 45 Hot water supply flow rate adjuster 60 Control device 61 Main body 61a Control unit 61b Storage unit 62 Remote controller 100 Hot water storage type hot water supply H Heat pump unit P Circulation pump DG ₁ Boiling heat quantity information collection unit DG ₂ Hot water storage heat quantity information collection part DG ₃ Use heat quantity information collection part

Claims (6)

The control device controls a boiling operation in which water is boiled into hot water by a heat source device and stored in a hot water storage tank, and a hot water supply operation in which the hot water stored in the hot water storage tank is supplied to a predetermined hot water supply destination via a hot water supply pipe line. A hot water storage water heater,
A hot water storage heat amount information collecting unit for collecting information related to the hot water storage amount in the hot water storage tank;
A use heat quantity information collecting unit for collecting information related to the use amount of hot water supply per unit time at the hot water supply destination; and
A hot water supply flow rate regulator that is provided in the hot water supply line and adjusts the hot water supply flow rate to the hot water supply destination;
With
The control device is based on the hot water storage calorie calculated using the information collected by the hot water storage calorie information collecting unit and the hot water supply usage calorie calculated using the information collected by the usage calorie information collecting unit. The remaining time until hot water breaks out is predicted during the hot water supply operation, and when the remaining time reaches a predetermined time, the hot water supply flow rate to the hot water supply destination is adjusted by the hot water supply flow rate regulator and water is supplied by the heat source machine. To prevent hot water from running out of water,
A hot water storage water heater characterized by that. The hot water storage heat amount information collecting unit includes a plurality of hot water storage temperature detectors that are dispersed in the height direction of the hot water storage tank and are provided in the hot water storage tank to detect the temperature of hot water in the hot water storage tank,
The used heat amount information collecting unit is provided in the hot water supply pipe to detect a hot water temperature at the hot water supply destination, and is provided in the hot water supply pipe to detect a hot water supply flow rate to the hot water supply destination. A hot water flow rate detector,
The control device calculates the amount of stored hot water in the hot water storage tank using the detection results of the plurality of remaining hot water temperature detectors, and uses the detection results of the hot water supply temperature detector and the hot water supply flow rate detector. Calculate the amount of heat used for hot water supply per unit time at the hot water supply destination,
The hot water storage type water heater according to claim 1. A boiling circulation line that reaches the upper part of the hot water storage tank from the lower part of the hot water storage tank through the heat source device;
A boiling heat amount information collecting unit for collecting information related to the amount of boiling heat per unit time in the heat source unit provided in the boiling circulation line;
Further comprising
The controller obtains the amount of boiling heat in the heat source unit using the information collected by the boiling heat amount information collecting unit while performing the hot water shortage prevention operation, and determines the flow rate of hot water to the hot water supply destination. Adjust with the hot water flow rate regulator according to the amount of boiling heat,
The hot water storage type water heater according to claim 1 or 2. The boiling circulation line is
A forward pipe for allowing water to flow into the heat source machine from the lower part of the hot water storage tank;
A return pipe for returning the hot water boiled by the heat source machine to the upper part of the hot water storage tank;
A circulation pump which is provided in the middle of the forward pipe or the return pipe and which is controlled by the control device;
Including
The boiling heat quantity information collecting unit
A water temperature detector provided in the middle of the forward pipe to detect the temperature of the water;
A hot water temperature detector provided in the middle of the return pipe for detecting the temperature of the hot water;
A water flow rate detector for detecting the flow rate of water flowing in the forward tube or the return tube provided in the middle of the forward tube or the return tube;
Including
While performing the hot water shortage prevention operation, the controller uses the detection results of the water temperature detector, the water flow rate detector, and the hot water temperature detector to calculate the amount of boiling heat in the heat source unit. The hot water storage type water heater according to claim 3, wherein the hot water storage type water heater is obtained. The boiling heat quantity information collecting unit
The circulation pump;
A water temperature detector provided in the middle of the forward pipe to detect the temperature of the water;
A hot water temperature detector provided in the middle of the return pipe for detecting the temperature of the hot water;
Including
While the hot water shortage prevention operation is being performed, the control device uses the detection results of the water temperature detector and the hot water temperature detector and the input values related to the flow rate control of the circulation pump in the heat source machine. The hot water storage type hot water supply device according to claim 3, wherein an amount of boiling heat is obtained.   The control device further includes a storage unit that stores the total amount of heat used by the hot water supply at the hot water supply destination every time the hot water supply operation is performed, and sets the maximum value of the total amount of heat used by the hot water supply stored in the storage unit for a predetermined period of time. The hot water storage type hot water supply apparatus according to any one of claims 1 to 5, wherein the hot water storage type hot water supply apparatus according to any one of claims 1 to 5, wherein the predetermined time when determining whether or not to perform the hot water shortage prevention operation is updated every time.

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