JP2003028505A - Hot water storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a user from feeling uncomfortable by preventing a hot water supply capability from rapidly changing. SOLUTION: An ordinary hot water supply capability in an ordinary hot water supply state is set larger than an auxiliary hot water supply capability in an auxiliary hot water supply state, and hot water supply control means H is switchable between the ordinary hot water supply state where hot water taken out from a hot water regenerative tank 1 is supplied to a hot water supply passage 5 and the auxiliary hot water supply state where hot water heated in heating means 3 is supplied to the hot water supply passage 5. Further, when the amount of stored hot water in the hot water regenerative tank 1 is more than the minimum kept amount, the operation is switched to the ordinary hot water supply state, while when the amount of hot water is less than the minimum kept amount, the operation is switched to the auxiliary hot water supply state. When the operation is switched from the ordinary hot water supply state to the auxiliary hot water supply state, in the ordinary hot water supply state the hot water supply capability is continuously reduced toward the auxiliary hot water supply capability from the ordinary hot water supply capability, and then the operation is switched to the auxiliary hot water supply state. Hereby, a hot water supply capability adjustment processing is executed for switching the operation to the auxiliary hot water supply state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage tank in which a hot water supply path is connected to an upper part and a water supply path is connected to a lower part, and hot water is stored in a state of forming a temperature stratification, and hot and cold water taken out from a bottom part of the hot water storage tank. After being heated by the heating means, hot water circulation means for circulating the hot water in a form of supplying the hot water to the upper part of the hot water storage tank, and hot water supply control means for controlling the hot water supply operation are provided, and the hot water supply control means, It is configured to be switchable between a normal hot water supply state in which hot water taken out from the hot water storage tank is supplied to the hot water supply passage and an auxiliary hot water supply state in which hot water heated by the heating means is supplied to the hot water supply passage, and When the amount of hot water stored in the tank is larger than the minimum secured amount, the state is switched to the normal hot water supply state, and when the amount of hot water stored in the hot water storage tank is smaller than the minimum secured amount, the auxiliary hot water supply state is set. Ri regarding water heater storage type that is configured to replace.

[0002]

2. Description of the Related Art In a hot water storage type hot water supply apparatus as described above, hot water is stored in a hot water storage tank in a state of forming a temperature stratification by operating hot water circulation means, and the hot water supply control means
When the amount of hot water stored in the hot water storage tank is greater than the minimum secured amount, the hot water is switched to the normal hot water supply state and hot water stored in the hot water storage tank is supplied, and the amount of hot water stored in the hot water storage tank is less than the minimum secured amount. In addition, the auxiliary hot water supply state is switched to supply hot water heated by the heating means (for example, Japanese Patent Publication No. 2-56575).

When hot water is supplied to a hot water supply apparatus of this type, the hot water is stored in a hot water storage tank by switching to a normal hot water supply state, thereby enabling hot water with a large hot water supply capability. , When the amount of hot water stored in the hot water storage tank becomes less than the minimum secured amount, switch to the auxiliary hot water supply state,
Hot water is heated by the heating means to prevent hot water from running out. Further, in the conventional hot water storage type hot water supply device, in the normal hot water supply state, it is possible to supply hot water with a large hot water supply capacity by utilizing the function of the hot water storage tank, and in the auxiliary hot water supply state, the hot water supply capacity at that time is The normal hot water supply capacity in the normal hot water supply state is larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state because the heating capacity of the heating means is limited.

[0004]

However, in the conventional hot water storage type hot water supply apparatus described above, the normal hot water supply capacity in the normal hot water supply state is larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state. While hot water is being supplied, when the amount of hot water stored in the hot water storage tank becomes less than the minimum secured amount, the hot water supply capacity changes rapidly from the normal hot water supply capacity to the auxiliary hot water supply capacity when switching from the normal hot water supply status to the auxiliary hot water supply status. As a result, a phenomenon such as a sharp decrease in the hot water supply amount or a sharp decrease in the hot water supply temperature may occur, which may give the user discomfort.

Further, in a case where the hot water heated by the heating means is supplied to the hot water supply passage as it is in the auxiliary hot water supply state, when the hot water supply capacity becomes larger than the auxiliary hot water supply capacity, one of the hot and cold water heated by the heating means is supplied. By supplying the part to the hot water supply passage and supplying the remaining part to the upper part of the hot water storage tank,
The amount of hot water stored in the hot water storage tank will increase. Therefore, in the above conventional hot water supply type hot water supply apparatus, when the amount of hot water stored in the hot water storage tank increases in the auxiliary hot water supply state and the amount of hot water storage exceeds the minimum secured amount, the auxiliary hot water supply state is switched to the normal hot water supply state. Therefore, the hot water supply capacity suddenly changes from the auxiliary hot water supply capacity to the normal hot water supply capacity, causing a phenomenon such as a rapid increase in the amount of hot water supply or a sharp increase in the hot water supply temperature. May cause discomfort.

The present invention has been made by paying attention to such a point, and an object of the present invention is to prevent a rapid change in hot water supply ability and prevent a user from feeling uncomfortable. The point is to provide a hot water storage type hot water supply device.

[0007]

In order to achieve this object, according to the invention as set forth in claim 1, a state in which a hot water supply passage is connected to an upper portion and a water supply passage is connected to a lower portion to form a temperature stratification. And a hot water circulating means for circulating hot water in a form of supplying the hot water to the upper part of the hot water storage tank after heating the hot water taken out from the bottom of the hot water storage tank by a heating means, and a hot water supply operation Hot water supply control means for controlling the hot water supply control means is provided, the hot water supply control means supplies the hot water taken out from the hot water storage tank to the hot water supply passage, and the hot water heated by the heating means to the hot water supply passage. When it is configured to be switchable to an auxiliary hot water supply state in which it is supplied, and when the amount of hot water stored in the hot water storage tank is larger than the minimum secured amount, it is switched to the normal hot water supply state and the amount of hot water stored in the hot water storage tank When the amount is less than the minimum secured amount, in the hot water storage type hot water supply device configured to switch to the auxiliary hot water supply state, the normal hot water supply capacity in the normal hot water supply state is higher than the auxiliary hot water supply capacity in the auxiliary hot water supply state. When the hot water supply control means is set to be large, and when switching from the normal hot water supply state to the auxiliary hot water supply state, the hot water supply capacity is continuously changed from the normal hot water supply capacity to the auxiliary hot water supply capacity in the normal hot water supply state. After the decrease, the hot water supply capacity adjusting process for switching to the auxiliary hot water supply state is executed.

That is, the normal hot water supply capacity in the normal hot water supply state is set to be larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state, and the hot water supply control means executes the hot water supply capacity adjustment process to set the normal hot water supply state. , The hot water supply capacity is continuously reduced from the normal hot water supply capacity to the auxiliary hot water supply capacity smaller than the normal hot water supply capacity, and then the normal hot water supply state can be switched to the auxiliary hot water supply state. After gradually changing from the capacity to the auxiliary hot water supply capacity, it becomes possible to switch from the normal hot water supply status to the auxiliary hot water supply status, and prevent the hot water supply capacity from changing rapidly from the normal hot water supply capacity to the auxiliary hot water supply capacity. It becomes possible. Therefore, it has become possible to provide a hot water storage type hot water supply device capable of preventing a rapid change in hot water supply capacity and preventing a user from feeling uncomfortable.

According to the second aspect of the present invention, the hot water storage tank is connected to the upper portion and the lower water supply passage to store the hot water in a state of forming the temperature stratification, and the bottom portion of the hot water storage tank. After the hot water taken out is heated by the heating means, hot water circulating means for circulating the hot water in a form of supplying the hot water to the upper part of the hot water storage tank, and hot water supply control means for controlling the hot water supply operation are provided. The means is configured to be switchable between a normal hot water supply state in which hot water taken out from the hot water storage tank is supplied to the hot water supply passage and an auxiliary hot water supply state in which hot water heated by the heating means is supplied to the hot water supply passage, and When the amount of hot water stored in the hot water storage tank is larger than the minimum secured amount, switching to the normal hot water supply state, and
When the amount of hot water stored in the hot water storage tank is less than the minimum secured amount, in the hot water storage type hot water supply device configured to switch to the auxiliary hot water supply state, the normal hot water supply capacity in the normal hot water supply state is the auxiliary It is set to be larger than the auxiliary hot water supply capacity in the hot water supply state, and when the hot water supply control means switches from the auxiliary hot water supply state to the normal hot water supply state, it is switched to the normal hot water supply state, and the hot water supply capacity is changed in the normal hot water supply state. The hot water supply capacity adjusting process is performed to continuously increase the auxiliary hot water supply capacity toward the normal hot water supply capacity.

That is, the hot water supply control means executes hot water supply capacity adjustment processing to switch from the auxiliary hot water supply state to the normal hot water supply state, and in the normal hot water supply state, the hot water supply capacity is larger than the auxiliary hot water supply capacity than the auxiliary hot water supply capacity. Since it is possible to continuously increase toward the hot water supply capacity, it is possible to gradually change the hot water supply capacity from the auxiliary hot water supply capacity to the normal hot water supply capacity when the auxiliary hot water supply status is switched to the normal hot water supply status. Therefore, it becomes possible to prevent the hot water supply capacity from changing rapidly from the auxiliary hot water supply capacity to the normal hot water supply capacity. Therefore, it has become possible to provide a hot water storage type hot water supply device capable of preventing a rapid change in hot water supply capacity and preventing a user from feeling uncomfortable.

According to a third aspect of the present invention, the hot water supply passage is branched into a hot water supply passage for adjusting hot water supply capacity and a hot water supply passage for non-adjustment of hot water supply ability, and the hot water supply control means controls the hot water supply for adjusting hot water supply ability. When hot water is supplied to the passage, the hot water supply capacity adjusting process is executed, and when hot water is supplied to the hot water supply capacity non-adjustment hot water supply passage, the normal hot water supply state is changed to the auxiliary hot water supply state without adjusting the hot water supply capacity in the normal hot water supply state. Alternatively, the hot water supply capacity non-adjustment process for switching from the auxiliary hot water supply state to the normal hot water supply state is executed.

That is, when the hot water supply control means executes the hot water supply capacity adjustment process, it is possible to prevent a rapid change in the hot water supply capacity. However, in the normal hot water supply state, the hot water supply capacity is made smaller than the normal hot water supply capacity. May be restricted,
Further, when the hot water supply control means executes the hot water supply capacity non-adjustment process, it becomes possible to always make the hot water supply capacity the normal hot water supply capacity in the normal hot water supply state, but there is a possibility that the hot water supply capacity may change abruptly. Then, when hot water is supplied to a hot water tap or the like, even if the hot water supply capacity is limited to a state smaller than the normal hot water supply capacity, there is a demand for preventing a rapid change in the hot water supply capacity. Even if there is a sudden change in the hot water supply capacity, there is a demand for supplying hot water with the maximum capacity without limiting the hot water supply capacity to a state smaller than the normal hot water supply capacity.

According to the third aspect of the present invention, when the hot water supply control means supplies hot water to the hot water supply tap or the like in the hot water supply capacity adjusting hot water supply passage, the hot water supply capacity adjusting process is executed and the hot water supply capacity non-adjusting hot water supply passage. Since it becomes possible to execute hot water supply capacity non-adjustment processing when hot water is supplied to a bathtub or the like, it is possible to satisfy each of the request for hot water supply to the hot water tap and the request for hot water supply to the bathtub. It becomes possible and easy to use.

According to the fourth aspect of the present invention, the minimum detected hot water storage amount detecting means for detecting that the hot water storage amount in the hot water storage tank is the minimum detected hot water storage amount larger than the minimum secured amount is provided. The hot water supply control means, based on the detection information by the minimum detected hot water storage amount detection means, and the hot water storage tank hot water supply amount taken from the hot water storage tank and supplied with hot water from the minimum detected hot water storage amount detection timing, the hot water storage in the hot water storage tank It is configured to manage quantity.

That is, the hot water supply control means determines the hot water storage tank based on the detection information by the minimum detected hot water storage amount detection means and the hot water storage tank hot water supply amount taken out from the hot water storage tank and supplied with hot water from the minimum detected hot water storage amount detection timing. It is possible to determine when the amount of hot water stored in the hot water tank is less than the minimum secured amount, and based on the detection information by the minimum detected hot water storage amount detecting means, it is possible to determine when the amount of hot water stored in the hot water storage tank is greater than the minimum secured amount. Become. Therefore, one condition is detected that the amount of hot water stored in the hot water storage tank is the minimum detected amount of hot water,
It is possible to determine when the amount of hot water stored in the hot water storage tank is less than or equal to the minimum secured amount by simply detecting the amount of hot water that is taken from the hot water storage tank and supplied with hot water from the minimum detected hot water storage amount detection timing. Therefore, it becomes possible to manage the amount of hot water stored in the hot water storage tank with a simple configuration.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot water storage type hot water supply apparatus according to the present invention will be described with reference to the drawings. [First Embodiment] As shown in FIG. 1, a hot water storage type hot water supply apparatus includes a hot water storage tank 1 for storing hot stratified water, a circulation path 2 for circulating hot water in the hot water storage tank 1, The heating unit 3 as a heating unit for heating the hot water flowing through the circulation path 2 and the hot water supply control unit H as a hot water supply control unit for controlling the hot water supply operation are operated. The hot water is circulated in the circulation path 2 while being heated by the heating unit 3.

Whether or not the hot water storage amount in the hot water storage tank 1 is equal to or larger than the minimum detected hot water storage amount, which is larger than the minimum secured amount,
An uppermost thermistor S1 as a minimum detected hot water storage amount detecting means for detecting the hot water temperature and a bottom thermistor S2 for detecting whether the hot water storage amount is full or more are provided. ing. The hot water storage tank 1 is connected with a water supply passage 4 for supplying water from the bottom to the hot water storage tank 1 by using tap water pressure, and a hot water supply passage 5 for supplying hot water from the upper portion of the hot water storage tank 1. The hot water storage tank 1 is supplied with water from the water supply passage 4.

A mixing water supply passage 6 branched from the water supply passage 4 is connected to the hot water supply passage 5, and the hot water supply passage 5 is connected to the connection portion.
A mixing valve 7 is provided that is capable of adjusting the mixing ratio of the hot water from the water and the water from the mixing water supply passage 6. A water supply thermistor 8 for detecting the water supply temperature is provided at a branch point between the water supply passage 4 and the mixing water supply passage 7.

On the upstream side of the mixing valve 7 in the hot water supply passage 5, the hot water supply passage 5 is provided from the upper part of the hot water storage tank 1.
A hot water outlet thermistor 9 for detecting the temperature of the hot water supplied is provided in the hot water supply passage 5, and a mixing thermistor 10 for detecting the temperature of the hot water mixed by the mixing valve 8 is provided downstream of the mixing valve 7 in the hot water supply passage 5. A hot water supply flow rate adjusting valve 11 that adjusts the flow rate of hot water in the hot water supply passage 5 is provided. Then, the hot water supply flow rate adjusting valve 1 in the hot water supply passage 5
The downstream side of 1 is branched into a hot water supply passage 5a for hot water supply capacity adjustment and a hot water supply passage 5b for non-hot water supply capacity adjustment. The hot-water supply capacity adjusting hot-water supply path 5a is provided with an adjustment hot-water supply flow rate sensor 12 for detecting the flow rate of hot water in the hot-water supply capacity adjusting hot-water supply path 5a, and the hot-water supply capacity non-adjusting hot-water supply path 5b is provided from the upstream side. , A non-adjustment flow rate adjusting valve 13 for adjusting the flow rate of hot and cold water in the hot water supply capacity non-adjusting hot water supply passage 5b, and a non-adjusting hot water supply flow rate sensor 14 for detecting the flow rate of hot and cold water in the hot water supply capacity non-adjusting hot water supply passage 5b. ing.

The hot water supply capacity adjusting hot water supply passage 5a is configured to supply hot water to a hot water supply tap A in a kitchen or a washroom, and the hot water supply capacity non-adjusting hot water supply passage 5b is configured to supply hot water to a bathtub B. ing. When hot water is supplied to the hot water tap A, the opening of the mixing valve 7 is adjusted so that the temperature of the hot water to be supplied becomes the hot water set temperature based on the hot water set temperature, the detection information of the hot water outlet thermistor 9 and the water supply thermistor 8. The amount of hot water supplied to the hot water tap A is adjusted by adjusting the opening of the hot water supply flow rate adjusting valve 11 while adjusting the hot water supply temperature. Further, when filling the bathtub B with water, the opening of the mixing valve 7 is adjusted to supply hot and cold water having a preset temperature to the bathtub, and when the preset amount of hot and cold water is supplied, the filling is completed. Is configured to. The hot water supply operation means G includes a hot water storage outlet thermistor 9, a water supply thermistor 8, a mixing valve 7,
Also, it is configured by the mixing thermistor 10 and the like.

The circulation path 2 and the hot water storage tank 1 return the hot water flowing through the circulation path 2 into the hot water storage tank 1 or take out the hot water from the hot water storage tank 1 into the circulation path 2 so that the hot water storage tank 1 Are connected at a total of three places, the top and bottom. More specifically, a hot water storage path 15 for supplying hot water from the circulation path 2 into the hot water storage tank 1 is connected to the upper part of the hot water storage tank 1 so as to share a part of the hot water supply path 5.
A hot water storage opening / closing valve 16 is provided in the hot water storage path 15. Both ends of the circulation path 2 are separately connected to the bottom of the hot water storage tank 1, and the hot water in the hot water storage tank 1 is
Is taken out from one end portion and flows toward the other end portion.

In the circulation path 2, a circulation flow rate sensor 17 for detecting the circulation rate of the hot water in the circulation path 2, a circulation pump 18, and a circulation for adjusting the circulation rate of the hot water in the circulation path 2 in order in the circulation direction of the hot water. The flow rate adjusting valve 19, the heating unit 3, and the heating temperature thermistor 2 for detecting the temperature of the hot water heated by the heating unit 3.
An on-off valve 21 that connects and disconnects the flow of hot water is provided. The hot water circulation means E is composed of a circulation path 2, a circulation pump 18, a circulation flow rate sensor 17, a circulation flow rate adjusting valve 19, a heating temperature thermistor 20, a hot water storage opening / closing valve 16, an opening / closing valve 21, and the like.

Although not described in detail, the heating unit 3 is composed of a heat pump type heating unit 3a for supplying the refrigerant by the heat pump device to heat the hot water, and an auxiliary heating unit 3b for heating the hot water by burning the burner. From the upstream side of the circulation path 2 in the circulation direction of the hot water, the heat pump type heating unit 3
a and the auxiliary heating unit 3b are provided in this order. And between the heat pump type heating unit 3a and the auxiliary heating unit 3b,
A heat pump heating temperature thermistor 22 that detects the temperature of the hot water heated by the heat pump heating unit 3a is provided.

The heat pump type heating section 3a heats the hot water flowing through the circulation path 2 by operating the heat pump device through communication with the hot water supply control section H to supply a refrigerant to the heat pump type heating section 3a. Is configured to. Further, the auxiliary heating unit 3b starts the combustion of the burner when the amount of water more than the set amount is supplied through the circulation path 2, and stops the combustion of the burner when the amount of the supplied water becomes less than the set amount, and the auxiliary heating unit 3b stops the combustion of the burner. In the combustion state, the temperature of the heated hot water is adjustable by adjusting the combustion amount of the burner.

The hot water supply control unit H, as shown in FIG.
Based on the command from the hot water storage remote controller R2, the hot water circulation means E,
By controlling the operations of the hot water supply operation means G and the heating unit 3, the hot water storage operation of storing hot water in the hot water storage tank 1, the hot water supply operation of supplying desired hot water to the hot water tap A or the bathtub B, etc. Is configured to run.

Hereinafter, each operation will be described. In the hot water storage operation, when there is a hot water storage request from the hot water storage remote controller R2,
The hot water storage opening / closing valve 16 is opened, the circulation pump 18 is operated, water is taken out from the bottom of the hot water storage tank 1 to the circulation path 2 and heated by the heating unit 3, and then the hot water storage path 15 is moved to the upper part of the hot water storage tank 1. Is configured to supply.

The operation of the heating unit 3 in the hot water storage operation will be described. When the heat pump type heating unit 3a is capable of heating, such as when the heat pump unit is not in operation, the heat pump unit is operated to activate the heat pump unit. Refrigerant is supplied to the heating unit 3a, and the heat pump heating unit 3
The hot water of the circulation path 2 is heated at a, and the heating amount of the heat pump heating unit 3a is adjusted so that the temperature detected by the heat pump heating temperature thermistor 22 becomes the target hot water storage temperature (for example, 60 ° C.). There is. When the hot water in the circulation path 2 cannot be heated so that the temperature detected by the heat pump heating temperature thermistor 22 becomes the target hot water storage temperature (for example, 60 ° C.) only by the heating by the heat pump heating unit 3a, or the heat pump heating unit 3a. When the heating cannot be performed in step 1, the amount of heating by the auxiliary heating unit 3b is adjusted so that the temperature detected by the heating temperature thermistor 20 becomes the target hot water storage temperature (for example, 60 ° C.).

In this way, the hot water in the circulation path 2 is heated to the preset hot water storage temperature by the heating unit 3, and the hot water is supplied from the upper portion of the hot water storage tank 1 to form the temperature stratification, thereby storing the hot water. It is configured to store hot water in the tank 1.

The hot water supply operation is started when the hot water tap A is opened or a hot water filling command is issued to fill the bathtub B, and the hot water storage amount in the hot water storage tank 1 is lower than the minimum secured amount. When there is a large amount, the hot water is switched to the normal hot water supply state and hot water taken out from the hot water storage tank 1 is supplied to the hot water supply passage 5 to supply hot water. When the amount of hot water stored in the hot water storage tank 1 is less than the minimum secured amount, auxiliary hot water supply It is configured to switch to the state and supply the hot water heated by the heating unit 3 to the hot water supply passage 5 to supply hot water. By adjusting the opening degree of the hot water supply flow rate adjusting valve 11, the normal hot water supply capacity in the normal hot water supply state is set to be larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state.

In addition, in the normal hot water supply state, the hot water stored in the hot water storage tank 1 is taken out to the hot water supply passage 5, and the hot water supply set temperature set by the hot water storage remote controller R2, the hot water outlet thermistor 9 and Water supply thermistor 8
The opening of the mixing valve 7 is adjusted so that the temperature of the hot water to be supplied becomes equal to the hot water supply set temperature based on the detection information of the above, and the detected temperature and the hot water supply set temperature are determined based on the detection information of the mixing thermistor 10. By finely adjusting the opening degree of the mixing valve 7 based on the deviation, hot water having a preset hot water supply temperature is supplied, and hot water is supplied with normal hot water supply capacity.

In the auxiliary hot water supply state, the heating unit 3
The hot water supplied from the hot water storage passage 15 to the hot water supply passage 5 is heated based on the hot water supply set temperature set by the hot water storage remote controller R2 and the detection information of the hot water outlet thermistor 9 and the water supply thermistor 8. The opening of the mixing valve 7 is adjusted so that the temperature becomes the hot water supply set temperature, and based on the detection information of the mixing thermistor 10, the opening of the mixing valve 7 based on the deviation between the detected temperature and the hot water supply set temperature. By finely adjusting the hot water supply temperature of the hot water supply, the hot water supply flow rate adjusting valve 1
It is configured such that the opening degree of 1 is narrowed to supply hot water with an auxiliary hot water supply capacity smaller than the normal hot water supply capacity.

By the way, in this auxiliary hot water supply state, hot water flowing through the circulation path 2 is heated by the auxiliary heating section 3b so that the temperature detected by the heating temperature thermistor 20 becomes the target hot water storage temperature (for example, 60 ° C.). The heating amount of the auxiliary heating unit 3b is adjusted.

In the auxiliary hot water supply state, when the flow rate of the hot water heated by the heating unit 3 and flowing through the hot water storage passage 15 is larger than the required hot water supply amount, the hot water storage passage 15 flows. A part of the hot water is supplied to the hot water supply path 5, and the remaining part is supplied to the upper part of the hot water storage tank 1 to store hot water in the hot water storage tank 1.

In the above-described hot water supply operation, the hot water supply control section H changes the hot water supply capacity in the normal hot water supply state when switching from the normal hot water supply state to the auxiliary hot water supply state while hot water is being supplied to the hot water supply capacity adjusting hot water supply passage 5a. After continuously decreasing from the normal hot water supply capacity to the auxiliary hot water supply capacity, switch to the auxiliary hot water supply status Perform the decreasing hot water supply capacity adjustment process, and when switching from the auxiliary hot water supply status to the normal hot water supply status, switch to the normal hot water supply status In the normal hot water supply state, the increasing side hot water supply capacity adjusting process for continuously increasing the hot water supply capacity from the auxiliary hot water supply capacity to the normal hot water supply capacity is executed. Further, when hot water is supplied to hot water supply capacity non-adjustment hot water supply passage 5b, hot water supply control unit H does not adjust the hot water supply capacity in the normal hot water supply state, but changes the normal hot water supply state to the auxiliary hot water supply state or the auxiliary hot water supply state to the normal hot water supply state. The hot water supply capability non-adjustment process for switching to the state is executed.

In the hot water supply capacity adjusting process on the decreasing side, when hot water is being supplied in a normal hot water supply state, as shown in (a) of FIG. 3, the hot water storage amount in the hot water storage tank 1 is larger than the minimum secured amount. When the hot water supply temperature reaches the minimum detected hot water storage amount (T1 in the figure), the opening degree of the hot water supply flow rate adjusting valve 11 is adjusted so that the hot water supply capacity decreases with time while maintaining the hot water supply set temperature. By adjusting the amount, the hot water supply capacity is continuously reduced from the normal hot water supply capacity N1 toward the auxiliary hot water supply capacity N2, and the amount of hot water stored in the hot water storage tank 1 is the minimum secured amount (T2 in the figure).
When this happens, the auxiliary hot water supply state is switched to.

In the increasing side hot water supply capacity adjusting process, when hot water is being supplied in the auxiliary hot water supply state, as shown in (b) of FIG. 3, the hot water storage amount in the hot water storage tank 1 becomes the minimum detected hot water storage amount. After a lapse of a set time (T3 in the figure) after that, the opening degree of the hot water supply flow rate adjusting valve 11 is changed so that the hot water supply temperature is kept at the hot water supply set temperature and the hot water supply capacity increases with time. The hot water supply capacity is continuously increased from the auxiliary hot water supply capacity N2 to the normal hot water supply capacity N1 by adjusting the hot water supply amount by adjusting the hot water supply capacity to finally become the normal hot water supply capacity N1 (T4 in the figure). I am trying.

In the hot water supply capacity non-adjustment process, when hot water is being supplied in the normal hot water supply state, as shown by the dotted line in FIG. T
When 2) is reached, the auxiliary hot water supply state is switched, the normal hot water supply capacity N1 is changed to the auxiliary hot water supply capacity N2, and when hot water is being supplied in the auxiliary hot water supply state, as shown by the dotted line in (b) of FIG. When the set amount of hot water in the tank 1 reaches the minimum detected hot water storage amount (T3 in the figure), the hot water supply state is switched to the normal hot water supply state and the auxiliary hot water supply capacity N2 is changed to the normal hot water supply capacity N1.

In this way, the hot water supply passage 5 for hot water supply capacity adjustment
When hot water is supplied to the hot water tap A at a, the hot water supply capacity adjustment process is executed to gradually change the hot water supply capacity from the normal hot water supply capacity to the auxiliary hot water supply capacity or from the auxiliary hot water supply capacity to the normal hot water supply capacity to rapidly increase the hot water supply capacity. When hot water is supplied to the bathtub B through the hot water supply capacity non-adjustment hot water supply passage 5b while performing various changes, a hot water supply capacity non-adjustment process is executed, and in the normal hot water supply state, the hot water supply capacity is always set as the normal hot water supply capacity. It is configured to supply hot water while maximizing the ability to supply hot water.

The hot water supply control unit H is supplying hot water to the hot water supply capacity adjusting hot water supply passage 5a based on the information detected by the adjusting hot water supply flow rate sensor 12 and the non-adjusting hot water supply flow rate sensor 14, or does not supply the hot water supply capacity. It is determined whether or not hot water is being supplied to the adjustment hot water supply passage 5b. When the hot water supply control unit H is supplying water to both the hot water supply capacity adjusting hot water supply passage 5a and the hot water supply capacity non-adjusting hot water supply passage 5b, the decreasing hot water supply capacity adjusting process and the increasing hot water supply capacity adjusting process described above are performed. It is configured to perform the process.

The hot water supply control unit H manages the amount of hot water stored in the hot water storage tank 1, and the management of the amount of hot water stored in the hot water storage tank 1 will be described. The minimum detected hot water storage amount is detected by the uppermost thermistor S1. Regarding the minimum secured amount that is smaller than the minimum detected hot water storage amount, the water supply thermistor 8, the hot water outlet thermistor 9, the mixing thermistor 10, the adjustment hot water supply flow rate sensor 12, and From the detection information of the non-adjustment hot water supply flow rate sensor 14, the hot water storage tank hot water supply amount that is taken out from the hot water storage tank 1 and supplied with hot water is calculated from the minimum detected hot water storage amount detection timing, and the hot water storage tank hot water supply amount and the uppermost thermistor S1.
It is determined from the minimum detected hot water storage amount detected in. In this way, the hot water storage amount in the hot water storage tank 1 is managed based on the detection information of the uppermost thermistor S1 and the hot water storage tank hot water supply amount.

By the way, the temperature detected by the water supply thermistor 8
From the temperature detected by the hot water outlet outlet thermistor 9 and the temperature detected by the mixing thermistor 10, the mixing ratio of the hot water from the hot water storage tank 1 and the water from the mixing water supply passage 6 is obtained. Since the hot water supply amount of hot water in the hot water storage tank 1 is obtained from the detected flow rate, the hot water supply amount of hot water in the hot water storage tank 1 is obtained by obtaining the hot water supply amount of hot water in the hot water storage tank 1 from the minimum detected hot water storage amount detection timing.

The operation of the hot water supply operation will be described with reference to the flowchart of FIG. First, when the hot water storage amount Q1 in the hot water storage tank 1 is less than the minimum detected hot water storage amount Q2, the auxiliary hot water supply state is switched to, and the set time elapses after the hot water storage amount Q1 in the hot water storage tank 1 reaches the minimum detected hot water storage amount Q2. The auxiliary hot water supply state is maintained until the switching timing comes (steps 1 to 3). At the switching timing, the auxiliary hot water supply state is switched to the normal hot water supply state (step 4), and when hot water is being supplied to the hot water supply capacity adjusting hot water supply passage 5a, the hot water supply capacity is continuously changed from the auxiliary hot water supply capacity to the normal hot water supply capacity. Then, the hot water supply capacity adjustment processing on the increasing side is executed so that the hot water supply capacity finally becomes the normal hot water supply capacity (steps 5 and 6).

When the hot water storage amount Q1 in the hot water storage tank 1 is equal to or more than the minimum detected hot water storage amount Q2, the hot water storage amount Q1 in the hot water storage tank 1 is switched to the normal hot water supply state and when hot water is being supplied to the hot water supply capacity adjusting hot water supply passage 5a. The normal hot water supply state is maintained until is less than the minimum detected hot water storage amount Q2 (steps 1, 7-).
9). When the hot water storage amount Q1 in the hot water storage tank 1 becomes less than the minimum detected hot water storage amount Q2, the normal hot water supply state is maintained and the hot water supply capacity is continuously decreased from the normal hot water supply capacity to the auxiliary hot water supply capacity. A capability adjustment process is executed (steps 9 and 10). After that, the hot water storage amount Q in the hot water storage tank 1
When 1 is less than the minimum secured amount Q3, the normal hot water supply state is switched to the auxiliary hot water supply state (steps 11 and 12).

When hot water is being supplied to the hot water supply passage 5b for non-hot water supply adjustment (step 8), the normal hot water supply state is maintained until the hot water storage amount Q1 in the hot water storage tank 1 becomes less than the minimum secured amount Q3 (step 8). 13) When the hot water storage amount Q1 in the hot water storage tank 1 becomes less than the minimum secured amount Q3, the auxiliary hot water supply state is switched to (step 12).

Incidentally, during the hot water supply operation described above, the hot water tap A
When the heating unit 3 is in operation, the stop processing such as stopping the operation of the heating unit 3 is interrupted when the closing operation of the The hot water supply is stopped.

[Second Embodiment] This second embodiment shows another embodiment of the hot water supply capacity adjusting process in the hot water supply control unit H in the first embodiment. The second embodiment will be described with reference to the drawings. Explain. By the way, the configuration other than the hot water supply capacity adjusting process in the hot water supply control unit H is the same as that of the first embodiment, and therefore the detailed description thereof will be omitted by giving the same reference numerals and the like.

That is, in the first embodiment, the hot water supply control unit H is configured to execute both the decreasing hot water supply capacity adjusting process and the increasing hot water supply capacity adjusting process.
In the second embodiment, the hot water supply control unit H is configured to execute only the hot water supply capacity adjustment processing on the decreasing side.

In addition, in the hot water supply operation, when the hot water is being supplied to the hot water supply capacity adjusting hot water supply passage 5a, the first
Similar to the embodiment, when switching from the normal hot water supply state to the auxiliary hot water supply state, in the normal hot water supply state, the hot water supply capacity is continuously decreased from the normal hot water supply capacity to the auxiliary hot water supply capacity, and then the auxiliary hot water supply state is reduced. The hot water supply capacity adjustment processing is executed. And the hot water supply path 5 for hot water supply capacity adjustment
When hot water is being supplied to a, when the set amount of hot water in the hot water storage tank 1 reaches the minimum detected hot water storage amount, the hot water is switched to the normal hot water supply state, and the hot water supply capacity is switched from the auxiliary hot water supply capacity to the normal hot water supply capacity. ing.

The operation of the hot water supply controller H will be described with reference to the flow chart of FIG. The flowchart of FIG. 5 is obtained by deleting step 5 and step 6 in the flowchart of FIG. 4 in the first embodiment, and is otherwise the same as the flowchart of FIG. 4 in the first embodiment.

In addition, when the hot water storage amount Q1 in the hot water storage tank 1 is less than the minimum detected hot water storage amount Q2, the auxiliary hot water supply state is switched to, and the hot water storage amount Q1 in the hot water storage tank 1 becomes the minimum detected hot water storage amount Q2. The auxiliary hot water supply state is maintained until the switching timing at which the set time elapses (steps 1 to 3). Then, at the switching timing, the auxiliary hot water supply state is switched to the normal hot water supply state (step 4),
Whether the hot water is being supplied to the hot water supply path 5a for adjusting hot water supply capacity or the hot water supply path 5b for not adjusting hot water supply capacity, the process directly returns.

The case where the hot water storage amount Q1 in the hot water storage tank 1 is equal to or larger than the minimum detected hot water storage amount Q2 is the same as steps 7 to 13 of FIG. 4 in the first embodiment, and therefore the detailed description thereof is omitted. .

[Other Embodiments] (1) In the second embodiment, the hot water supply control unit H selects only the decreasing hot water supply capacity adjusting process among the decreasing hot water supply capacity adjusting process and the increasing hot water supply capacity adjusting process. However, the hot water supply control unit H may be configured and executed to execute only the hot water supply capacity adjustment process on the increasing side.

(2) In the first and second embodiments, the hot water supply passage 5 is branched into the hot water supply passage 5a for hot water supply capacity adjustment and the hot water supply passage 5b for non-hot water supply capacity adjustment, but the hot water supply passage 5 is not branched, The hot water supply passage 5 may be configured to supply hot water to the hot water tap B. In this case, in the first embodiment, when hot water is supplied, the hot water supply control unit H always executes the decreasing-side hot water supply capacity adjusting process and the increasing-side hot water supply capacity, and in the second embodiment, hot water supply is performed. At times, the hot water supply capacity adjustment processing on the decreasing side is always executed.

(3) In the first and second embodiments, in the hot water supply capacity adjusting process on the decreasing side and the hot water supply capacity adjusting process on the increasing side, the hot water supply amount is continuously changed while the hot water supply temperature is maintained. Although the hot water supply capacity is continuously changed, in the decreasing side hot water supply capacity adjusting process and the increasing side hot water supply capacity adjusting process, the mixing ratio is adjusted by the mixing valve 7 while maintaining the hot water supply amount. It is also possible to continuously change the hot water supply temperature to continuously change the hot water supply capacity.

Further, when a hot water supply amount or a hot water supply amount is provided with a selection switch capable of selecting which is to be prioritized, and when the hot water supply amount is selected by the selection switch, the hot water supply capacity adjusting process on the decreasing side is performed. In the increasing hot water supply capacity adjustment process, the hot water supply capacity is continuously changed by continuously changing the hot water supply amount while maintaining the hot water supply temperature, and conversely, the hot water supply temperature is selected by the selection switch. Then,
It is also possible to carry out by continuously changing the hot water supply temperature and continuously changing the hot water supply capacity while maintaining the hot water supply amount. That is, in the decreasing-side hot water supply capacity adjusting process and the increasing-side hot water supply capacity adjusting process, which of the hot water supply amount and the hot water supply temperature is maintained and which is changed can be appropriately changed.

(4) In the first and second embodiments, when the hot water storage amount in the hot water storage tank 1 reaches the minimum detected hot water storage amount and the switching timing comes after the set time elapses, the auxiliary hot water supply state is switched to the normal hot water supply state. I try to
For example, when the amount of hot water stored in the hot water storage tank 1 reaches the minimum detected hot water storage amount, the switching timing condition can be changed as appropriate, such as switching from the auxiliary hot water supply state to the normal hot water supply state.

(5) In the first and second embodiments, the hot water supply capacity is continuously changed by changing the hot water supply amount over time in the decreasing hot water supply capacity adjusting process and the increasing hot water supply capacity adjusting process. However, the amount of change in the hot water supply capacity per unit time can be changed as appropriate, and the amount of hot water supply can be changed continuously.

(6) In the first and second embodiments, the amount of hot water stored in the hot water storage tank 1 is managed based on the uppermost thermistor S1 and the amount of hot water supplied to the hot water storage tank. A plurality of thermistors are provided in the hot water storage tank 1 to detect that the amount is a set amount by detecting the hot water temperature, and the hot water storage amount in the hot water storage tank 1 is determined based on the detection information of the plurality of thermistors. You may manage.

(7) In the first and second embodiments described above, the heating unit 3 is provided with the heat pump type heating unit 3a and the auxiliary heating unit 3b. However, the heating unit 3 is provided with only the auxiliary heating unit 3b, or the heat pump type. Heating unit 3a and auxiliary heating unit 3
In addition to b, various heating means such as an exhaust heat utilization type heating section for heating by utilizing the exhaust heat of the external heat source device can be applied.

(8) In the first and second embodiments described above, the hot water storage type hot water supply device according to the present invention is a hot water storage type hot water supply device using a heat pump device, but various types such as those not equipped with a heat pump device are used. The hot water storage type hot water supply device is applicable.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hot water storage type hot water supply device.

FIG. 2 is a control block diagram of a hot water storage type hot water supply device.

FIG. 3 is an explanatory diagram of hot water supply capacity adjustment processing.

FIG. 4 is a flowchart showing a control operation in the first embodiment.

FIG. 5 is a flowchart showing a control operation in the second embodiment.

[Explanation of symbols] 1 Hot water storage tank 3 heating means 4 water supply channels 5 hot water supply passage E hot water circulation means H Hot water supply control means S1 Minimum detection hot water storage amount detection means

   ─────────────────────────────────────────────────── ─── Continued front page    (71) Applicant 000221834             Toho Gas Co., Ltd.             19-18 Sakurada-cho, Atsuta-ku, Nagoya-shi, Aichi (71) Applicant 000196680             Seibu Gas Co., Ltd.             1-1-17 Chiyo, Hakata-ku, Fukuoka City, Fukuoka Prefecture (72) Inventor Toshinari Sakai             1-3 1-3 Kitakko Shiratsu, Konohana-ku, Osaka City, Osaka Prefecture             No. within Osaka Gas Co., Ltd. (72) Inventor Yasuhito Hashizume             1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka             Harman Co., Ltd. (72) Inventor Toshihiro Kawauchi             1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka             Harman Co., Ltd. (72) Inventor Yasushi Fujikawa             1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka             Harman Co., Ltd. (72) Inventor Yoshio Fujimoto             1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka             Harman Co., Ltd. (72) Inventor Tomoya Sakiishi             1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka             Harman Co., Ltd. (72) Inventor Kazuya Yamaguchi             1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas             Within the corporation (72) Inventor Kenichi Tanogami             1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas             Within the corporation (72) Inventor Mikio Ito             Aichi Prefecture Nagoya City Atsuta Ward Sakuradacho 19-18 East             Within Japan Gas Co., Ltd. (72) Inventor Ikuhide Ichikawa             1-1-17 Chiyo, Hakata-ku, Fukuoka City, Fukuoka Prefecture             Inside Seibu Gas Co., Ltd. F-term (reference) 3L025 AA01 AA13

Claims (4)

[Claims] 1. A hot water storage tank in which a hot water supply path is connected to an upper part and a water supply path is connected to a lower part, and hot water is stored in a state of forming a temperature stratification, and hot water taken out from the bottom of the hot water storage tank is heated by a heating means. After that, hot water circulation means for circulating the hot water in a form of supplying the hot water to the upper part of the hot water storage tank and hot water supply control means for controlling the hot water supply operation are provided, and the hot water supply control means takes out the hot water from the hot water storage tank. It is configured to be switchable between a normal hot water supply state in which hot water is supplied to the hot water supply passage and an auxiliary hot water supply state in which hot water heated by the heating means is supplied to the hot water supply passage, and the amount of hot water stored in the hot water storage tank is When the amount is larger than the minimum secured amount, the normal hot water supply state is switched to, and when the stored amount of hot water in the hot water storage tank is smaller than the minimum secured amount, the auxiliary hot water supply state is switched to. In the hot water storage device, the normal hot water supply capacity in the normal hot water supply state is set to be larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state, and the hot water supply control means sets the normal hot water supply When switching from the state to the auxiliary hot water supply state, in the normal hot water supply state, the hot water supply capacity is continuously reduced from the normal hot water supply capacity toward the auxiliary hot water supply capacity, and then the hot water supply capacity adjustment process for switching to the auxiliary hot water supply state is performed. A hot water storage device that is configured to run. 2. A hot water storage tank, in which a hot water supply passage is connected to an upper portion and a water supply passage is connected to a lower portion, to store hot water in a state of forming a temperature stratification, and hot water taken out from a bottom portion of the hot water storage tank is heated by a heating means. After that, hot water circulation means for circulating the hot water in a form of supplying the hot water to the upper part of the hot water storage tank and hot water supply control means for controlling the hot water supply operation are provided, and the hot water supply control means takes out the hot water from the hot water storage tank. It is configured to be switchable between a normal hot water supply state in which hot water is supplied to the hot water supply passage and an auxiliary hot water supply state in which hot water heated by the heating means is supplied to the hot water supply passage, and the amount of hot water stored in the hot water storage tank is When the amount is larger than the minimum secured amount, the normal hot water supply state is switched to, and when the stored amount of hot water in the hot water storage tank is smaller than the minimum secured amount, the auxiliary hot water supply state is switched to. In the hot water storage device, the normal hot water supply capacity in the normal hot water supply state is set to be larger than the auxiliary hot water supply capacity in the auxiliary hot water supply state, and the hot water supply control means sets the auxiliary hot water supply device. When the state is switched to the normal hot water supply state, the normal hot water supply state is switched to, and in the normal hot water supply state, a hot water supply capacity adjusting process for continuously increasing the hot water supply capacity from the auxiliary hot water supply capacity to the normal hot water supply capacity is executed. Storage type hot water supply device configured as described above. 3. The hot water supply passage is branched into a hot water supply passage for hot water supply capacity adjustment and a hot water supply passage for non-hot water supply capacity adjustment, and when the hot water supply control means supplies hot water to the hot water supply passage for adjusting hot water supply capacity, the hot water supply capacity is provided. When the adjustment process is executed and hot water is supplied to the hot water supply non-adjustment hot water supply passage, the normal hot water supply state is adjusted to the auxiliary hot water supply state or the auxiliary hot water supply state to the normal hot water supply state without adjusting the hot water supply ability in the normal hot water supply state. The hot water storage type hot water supply apparatus according to claim 1 or 2, which is configured to perform a hot water supply capacity non-adjustment process for switching to a hot water supply state. 4. The minimum detected hot water storage amount detecting means for detecting that the hot water storage amount in the hot water storage tank is a minimum detected hot water storage amount larger than the minimum secured amount, and the hot water supply control means is provided for the minimum detected hot water storage amount. The amount of hot water stored in the hot water storage tank is managed based on information detected by the amount detecting means, and the amount of hot water stored in the hot water storage tank that is taken out from the hot water storage tank and supplied with hot water from the minimum detected hot water storage amount detection timing. The hot water storage type hot water supply apparatus according to any one of claims 1 to 3.