KR20170017723A - Hot water supply system - Google Patents

Abstract

The present invention relates to a hot water supply system, which sets a boiling operation schedule based on the usage history of hot water supply operations, thereby saving energy. According to the present invention, the hot water supply system includes: a tank storing water; a heat pump absorbing the heat from a natural environment to heat the water; a circulation means for circulating the water between the tank and the heat pump; a combustion apparatus which heats the water by using the combustion of fuel gas; a controller; and a user terminal capable of communicating with the controller. The controller can execute a boiling operation for heating the water by using the heat pump while circulating the water between the tank and the heat pump by using a circulation means. The controller is configured to set the schedule of the boiling operation based on usage history of the hot water supply operations of the hot water supply system. The user terminal is configured to present advice to a user when the differences between the hot water supply operations in the usage history are great.

Description

HOT WATER SUPPLY SYSTEM

The technology disclosed herein relates to a hot water supply system.

Patent Document 1 discloses a hot water supply system. A circulation means for circulating water between the tank and the heat pump; a circulation means for circulating water between the tank and the heat pump for combustion by heating the water by combustion of the fuel gas; Device, and a controller. In the hot water supply system, the controller can perform boiling operation in which water is heated by the heat pump while circulating water between the tank and the heat pump by the circulation means. In the hot water supply system, the controller is configured to set a schedule of boiling operation based on the past hot water supply history of the hot water supply system.

Patent Document 1: JP-A-2013-224762

According to the configuration for setting the boiling operation schedule based on the history of the hot water supply in the past like the above hot water supply system, the hot water required for hot water supply according to the lifestyle of the user is set at the timing just before the hot water supply is actually started It can be stored in the tank. As a result, it is possible to suppress the occurrence of a situation in which the tank is running out of hot water and to perform hot water supply using hot water stored in the tank as much as possible. Since the water heated by the heat pump is stored in the tank, when hot water is used by using the high-temperature water stored in the tank, the hot water supply can be performed with higher energy efficiency than in the case of heating the water by using the combustion device . Further, according to the hot water supply system described above, since the time from the completion of the boiling operation to the actual hot water supply is short, the heat radiation loss from the tank can be reduced.

However, in the above-described hot water supply system, if the method of hot water supply by the user becomes irregular, it becomes difficult to store the hot water required for hot water supply in the tank at the timing immediately before the actual hot water supply is started. As a result, the water in the tank is exhausted, heating of the water by the combustion device is required, and the energy efficiency is sometimes lowered. In addition, the time from the completion of the boiling operation to the actual hot water supply is prolonged, and the heat radiation loss from the tank may increase.

In this specification, a technique for solving the above problems is provided. The present specification provides a technology capable of saving energy in a hot water supply system for setting a schedule of boiling operation based on the past history of hot water supply.

The present invention provides a hot water supply system comprising: a tank for storing water; a heat pump for heating water by absorbing heat from the natural environment; circulation means for circulating water between the tank and the heat pump; A controller, and a user terminal capable of communicating with the controller. The controller can perform boiling operation in which water is heated by the heat pump while circulating water between the tank and the heat pump by the circulation means. The controller is configured to set a schedule of boiling operation based on the past history of hot water supply of the hot water supply system. The user terminal is configured to present advice to the user when the history of the hot water supply in the hot water supply system is large.

In the above-described hot water supply system, the user terminal gives advice to the user when the history of the hot water supply in the hot water supply system is large. Accordingly, it is possible to urge the user to regularly perform the hot water supply on that day, thereby saving energy.

In the above-described hot water supply system, the controller may be configured to set a schedule of boiling operation based on the history of the hot water supply start time of the hot water supply system, and the user terminal may set a schedule of the hot water supply start time Or may be configured to present advice to the user in a large case.

In the above-described hot water supply system, since the schedule of boiling operation is set based on the history of the past hot water supply start time, the boiling operation can be executed according to the time at which the user starts the hot water supply on that day. At this time, in the hot water supply system, the user terminal gives advice to the user when the history of the hot water supply start time in the past is large. Accordingly, it is possible to urge the user to regularly perform the hot water supply on that day, thereby saving energy.

In the above-described hot water supply system, the controller may be configured to set a schedule of boiling operation based on the past history of the hot water supply start time of the hot water supply system, and the user terminal may set the history of the hot water supply start time of the hot water supply system Or may be configured to present advice to the user when the deviation is large.

In the above-described hot water supply system, the boiling operation schedule is set based on the past history of the hot water supply start time, so that the boiling operation can be executed in accordance with the time of executing the hot water supply in the user's home. At this time, in the above-described hot water supply system, the user terminal gives advice to the user when the history of the hot water supply start time in the past is large. Accordingly, it is possible to urge the user to regularly perform the hot water supply on that day, thereby saving energy.

In the above-described hot water supply system, the controller may be configured to set a schedule of boiling operation based on the history of the hot water supply end time of the hot water supply system, and the user terminal may set a schedule of the hot water supply end time Or may be configured to present advice to the user in a large case.

In the hot water supply system described above, the schedule of the boiling operation is set based on the past history of the hot water supply end time, so that the user is prohibited from executing the boiling operation according to the time when the hot water supply ends on that day, can do. At this time, in the above-described hot water supply system, the user terminal gives advice to the user when the deviation of the past hot water supply end time is large. Accordingly, it is possible to urge the user to regularly perform the hot water supply on that day, thereby saving energy.

In the above-described hot water supply system, the controller may be configured to set the boiling amount of the boiling operation based on the history of the hot water supply usage of the hot water supply system in the past, and the user terminal may be configured such that the history of the hot water supply usage of the hot water supply system Or may be configured to present advice to the user.

In the above-described hot water supply system, since the boiling amount of the boiling operation is set based on the past history of the hot water usage amount, the boiling water can be stored in the tank according to the amount of hot water used by the user. At this time, in the above-described hot water supply system, the user terminal gives advice to the user in the event that the history of the hot water supply usage in the past is large. Accordingly, it is possible to urge the user to regularly perform the hot water supply on that day, thereby saving energy.

In the above hot water supply system, the user terminal may be configured to present advice to the user when the light / heat ratio calculated based on the past hot water supply history of the hot water supply system exceeds a predetermined value.

According to the hot water supply system described above, energy saving can be achieved by urging the user to save the light and heat cost.

1 is a view schematically showing a configuration of a hot water supply system 2 in the embodiment;
2 is a diagram schematically showing a time zone in which hot water supply is executed in a general assumption;
3 is a flowchart showing a first heat pump operation process;
4 is a flowchart showing a second heat pump operation process;
5 is a flowchart showing the water supply process.
6 is a diagram showing an example of display on the screen 112 of the user terminal 110;
7 is a view showing another example of display on the screen 112 of the user terminal 110;
8 is a diagram showing an advice statement 124 displayed on the screen 112 of the user terminal 110 and examples of display conditions thereof.
9 is a diagram showing another example of the advisory statement 124 displayed on the screen 112 of the user terminal 110 and the display condition thereof.

(Example)

1, the hot water supply system 2 according to the present embodiment includes a tank 10, a tank water circulation path 20, a tap water introduction path 30, a supply path 40, A controller 50, a combustion device 60, a controller 100, and a user terminal 110.

The heat pump 50 is a heat source for heating water in the tank water circulation passage 20 by absorbing heat from outside air as a natural environment. Although not shown, the heat pump 50 includes a refrigerant circulation path for circulating a refrigerant (an alternative refrigerant, for example, R410A or the like), an evaporator for performing heat exchange between the outside air and the refrigerant, and a compressor A condenser for exchanging heat between the water in the tank water circuit 20 and the refrigerant at high temperature and high pressure, and an expansion valve for reducing the pressure of the refrigerant after completion of the heat exchange to low temperature and low pressure. Further, the heat pump 50 is provided with an outside air temperature sensor 52 for measuring the outside air temperature.

The tank 10 stores the hot water heated by the heat pump 50. The tank 10 is of a closed type and is covered on the outside by a heat insulating material. In the tank 10, water is stored up to full water. In this embodiment, the capacity of the tank 10 is 100L. Thermistors 12, 14, 16 and 18 are mounted on the tank 10 at predetermined intervals in the height direction of the tank 10. [ Each thermistor 12, 14, 16, 18 measures the temperature of the water at its mounting location. For example, each thermistor 12, 14, 16, 18 measures the temperature of water at locations 6L, 12L, 30L, 50L from the top of tank 10, respectively.

The tank water circulation passage 20 has an upstream end connected to the lower portion of the tank 10 and a downstream end connected to the upper portion of the tank 10. A circulation pump (22) is fitted in the tank water circulation passage (20). The circulation pump 22 delivers water in the tank water circuit 20 from the upstream side to the downstream side. In addition, the tank water circuit 20 passes through a heat exchanger (not shown) of the heat pump 50. Thereby, when the heat pump 50 is operated, the water in the tank water circuit 20 is heated by the heat exchanger of the heat pump 50. Therefore, when the circulation pump 22 and the heat pump 50 are operated, the water in the lower part of the tank 10 is heated by the heat pump 50, and the heated water is returned to the upper part of the tank 10. That is, the tank water circuit (20) is a channel for accumulating heat in the tank (10). A thermistor 24 is fitted on the upstream side of the heat pump 50 of the tank water circuit 20. The thermistor 24 measures the temperature of the water that is drawn from the bottom of the tank 10 and passes through the heat pump 50.

The tap conduit 30 is connected at its upstream end to the tap water supply source 31. A thermistor (32) is fitted in the tap introducing passage (30). The thermistor 32 measures the temperature of tap water. The downstream side of the tap water introduction path 30 branches into the first introduction path 30a and the second introduction path 30b. The downstream end of the first introduction path 30a is connected to the lower portion of the tank 10. The downstream end of the second introduction path 30b is connected in the middle of the supply path 40. [ A mixing valve 42 is provided at a connecting portion between the downstream end of the second introduction passage 30b and the supply passage 40. [ The mixing valve 42 adjusts the amount by which the water in the second introduction path 30b is mixed with the hot water flowing in the supply path 40. [

The supply passage 40 has an upstream end connected to the upper portion of the tank 10. A combustion device 60 is fitted in the supply passage 40 on the downstream side of the connecting portion with the second introduction passage 30b. A thermistor 44 is fitted in the supply passage 40 on the downstream side of the combustion device 60. The thermistor 44 measures the temperature of the supplied hot water. The combustion device 60 heats the water by the combustion of the fuel gas. The combustion device 60 heats the water in the supply path 40 so that the temperature of the hot water measured by the thermistor 44 coincides with the hot water setting temperature. The downstream end of the supply path 40 is connected to a hot water supply location (for example, a hot water supply faucet such as a kitchen or a shower). A water supply valve 46 for supplying water to the bath is provided at the downstream end of the supply path 40 and a reheating device (not shown) for reheating the water in the bath after the water supply is supplied.

The controller 100 is electrically connected to each component and controls the operation of each component. A remote controller (not shown) is connected to the controller 100. The user of the hot water supply system 2 can set the hot water supply set temperature, which is the temperature of the water supplied to the hot water supply through the remote controller, the bath set temperature which is the temperature of the water to be supplied to the bathtub, Which is a time for warming the water supplied with the hot water, can be set.

The user terminal 110 can communicate with the controller 100 wirelessly. The user terminal 110 is, for example, a smart phone in which a dedicated application for association with the hot water supply system 2 is installed. The user terminal 110 can display various kinds of information related to the hot water supply system 2. [ In addition, the user terminal 110 can receive various operation inputs related to the hot water supply system 2.

Next, the operation of the hot water supply system 2 of the present embodiment will be described. The hot water supply system 2 can perform the boiling operation, the hot water supply operation and the hot water supply operation. In the present specification, both the hot water supply operation of the hot water supply system 2 and the hot water supply operation are referred to as hot water supply by the hot water supply system 2. Each operation will be described below.

(Boiling operation)

The boiling operation is an operation of heating the water in the tank 10 by the heat pump 50. When the execution of the boiling operation is instructed by the controller 100, the heat pump 50 is operated and the circulation pump 22 is operated. When the circulation pump 22 operates, water in the tank 10 circulates in the tank water circulation passage 20. That is, water present in the lower portion of the tank 10 is introduced into the tank water circulation passage 20, heated by the heat of the refrigerant when the introduced water passes through the heat exchanger in the heat pump 50, (10). As a result, hot water is stored in the tank (10). A high temperature water layer is formed on the top of the tank 10 and a low temperature water layer is formed on the bottom.

(Hot water operation)

The hot water supply operation is an operation of supplying water in the tank 10 to the hot water supply location. The hot water supply operation can be performed even during the above boiling operation. Tap water flows into the lower portion of the tank 10 from the tap water introduction path 30 (first introduction path 30a) by the water pressure from the tap water supply source 31 when the hot water supply is opened in the hot water supply location. At the same time, the hot water in the upper part of the tank 10 is supplied to the hot water supply place through the supply path 40.

The controller 100 opens the mixing valve 42 when the temperature of the water supplied from the tank 10 to the supply path 40 (that is, the measured temperature of the thermistor 12) is higher than the hot water setting temperature, The tap water is introduced into the supply path 40 from the supply path 30b. Therefore, the water supplied from the tank 10 and the tap water supplied from the second introduction path 30b are mixed in the supply path 40. [ The controller 100 adjusts the opening degree of the mixing valve 42 so that the temperature of the water supplied to the hot water supply location coincides with the hot water setting temperature. On the other hand, the controller 100 operates the combustion device 60 when the temperature of the water supplied from the tank 10 to the supply path 40 is lower than the hot water setting temperature. Therefore, the water passing through the supply path 40 is heated by the combustion device 60. [ The controller 100 controls the output of the combustion device 60 so that the temperature of the water supplied to the hot water supply location coincides with the hot water setting temperature.

(Water supply operation)

The running water supply operation is an operation of supplying water in the tank 10 to the bathtub. The water supply operation can be performed even during the above boiling operation. When the water supply start time is reached based on the water supply completion time set by the remote controller, the controller 100 opens the water supply valve 46. Thereby, in the same manner as in the hot water supply operation, water adjusted to the bath set temperature is supplied to the bathtub.

(Learning control of boiling operation)

2 is a diagram schematically showing a time zone in which hot water supply is performed during a certain day. In the present embodiment, 24 hours with 2:00 as a starting point is set as a unit time for specifying a day.

Generally, for example, hot water supply is performed for the first time from 6:00 to 7:00 (6:00 in the example of FIG. 2). The first hot water supply is, for example, hot water for preparation of breakfast and washing. In the first hot water supply, hot water of about 5L to 20L is supplied. Then, for example, the second hot water supply is executed from 11:00 to 12:00 (11:00 in the example of FIG. 2). The second hot water is, for example, hot water for the preparation of lunch. Hot water of about 5L to 20L is also supplied from the second hot water supply. Thereafter, for example, the third hot water supply is executed at 20:00 (20:00 in the example of FIG. 2). The third hot water supply is the operation of supplying hot water to the bathtub. In the water supply operation, hot water of about 150 L to 180 L is supplied. Thereafter, for example, the last hot water supply is performed from 23:00 to 0:00 (approximately 23:00 in the example of FIG. 2). The last hot water is, for example, hot water for gargling. In the last hot water supply, hot water of about 5L to 10L is supplied. The last hot water supply ends at about 0:00.

In the present embodiment, the controller 100 stores the hot water supply usage history indicating the time at which the hot water supply is started, the time at which the hot water supply is finished, and the amount of hot water used as the hot water supply each time the hot water supply is executed. The controller 100 stores the time at which the heating is started, the time at which the heating is finished, and the amount of electric power used by the heat pump 50 as electric power usage records each time the water heating by the heat pump 50 is performed. The controller 100 stores the time at which heating is started, the time at which heating is finished, and the gas consumption amount in the combustion apparatus 60 as gas usage records each time heating of water by the combustion apparatus 60 is performed. Then, the controller 100 stores the hot water use record for one day, the electric power use record, and the gas use record as a hot water history for one day. In the present embodiment, the controller 100 stores the hot water supply history of each day in the past predetermined period (for example, one month).

Next, the processing executed by the controller 100 every 24 hours (every time the time reaches 2:00) will be described. The controller 100 newly stores the hot water supply history of the previous day every 24 hours.

Next, the controller 100 specifies the earliest time of the hot water supply start time (hot water supply start time) in the past seven days from the hot water supply history of the past seven days. Hereinafter, this time is referred to as " hot water supply start time (S1) ". For example, the controller 100 specifies 6:00 as the hot water supply start time (S1) (see FIG. 2).

In addition, the controller 100 specifies the most hot water usage amount among the hot water usage amount from the hot water supply start time to the start of the hot water supply start in the past seven days from the hot water history of the past seven days. Hereinafter, this used hot water supply amount is referred to as " first hot water supply amount Q1 ". For example, the controller 100 specifies 30L as the first hot water supply quantity Q1.

In addition, the controller 100 specifies the earliest time among the time at which the water supply operation is started (water supply start time) in the past seven days from the operation history of the past seven days. Hereinafter, this time is referred to as " hot water supply start time (B1) ". As described above, in this embodiment, the water supply operation is set to start at 20:00 every day. For example, the controller 100 specifies 20:00 as the water supply start time (B1) (see Fig. 2).

Further, the controller 100 specifies the latest time of the last hot water supply (hot water supply end time) in the past seven days from the past seven days of operation history. Hereinafter, this time is referred to as "hot water supply end time (G1)". For example, the controller 100 specifies 0:00 as the hot water supply end time G1 (see Fig. 2).

The controller 100 specifies the first predetermined time? Based on the temperature (TW, i.e., the water temperature of the tap water) measured by the thermistor 32 and the first hot water supply quantity Q1. The controller 100 specifies the second predetermined time? And the third predetermined time? Based on the temperature (TW, that is, the water temperature of the tap water) measured by the thermistor 32.

As shown in Fig. 2, when the temperature TW is equal to or higher than 21 占 폚, the controller 100 specifies "20 minutes" as the first predetermined time?. When the temperature TW is not less than 13 占 폚 and less than 21 占 폚, the controller 100 specifies "30 minutes" as the first predetermined time?. When the temperature TW is less than 13 占 폚, the controller 100 specifies "45 minutes" as the first predetermined time?. The controller 100 specifies a shorter time as the first predetermined time? As the temperature TW is higher.

As shown in Fig. 2, when the first hot water supply quantity Q1 is less than 12L, the controller 100 specifies "5 minutes" as the addition time of the first predetermined time?. When the first hot water supply quantity Q1 is 12L or more and less than 30L, the controller 100 specifies "10 minutes" as the addition time of the first predetermined time?. When the first hot water supply quantity Q1 is 30 L or more, the controller 100 specifies " 15 minutes " as the addition time of the first predetermined time?. The controller 100 specifies a shorter time as the addition time of the first predetermined time? As the first hot water supply quantity Q1 becomes smaller.

Similarly, as shown in Fig. 2, when the temperature TW is equal to or higher than 21 占 폚, the controller 100 specifies "40 minutes" as the second predetermined time?. If the temperature TW is not less than 13 占 폚 and less than 21 占 폚, the controller 100 specifies "50 minutes" as the second predetermined time?. When the temperature TW is less than 13 占 폚, the controller 100 specifies "60 minutes" as the second predetermined time?. The controller 100 specifies a shorter time as the second predetermined time? As the temperature TW is higher.

Similarly, as shown in Fig. 2, when the temperature TW is equal to or higher than 21 占 폚, the controller 100 specifies "80 minutes" as the third predetermined time?. When the temperature TW is 13 ° C or more and less than 21 ° C, the controller 100 specifies "50 minutes" as the third predetermined time γ. When the temperature TW is less than 13 占 폚, the controller 100 specifies "40 minutes" as the third predetermined time?. The controller 100 specifies a longer time as the third predetermined time? As the temperature TW is higher.

Next, the controller 100 specifies the first heat pump operation time S0, which is the time before the first predetermined time? Specified from the hot water supply start time S1. In this embodiment, when the first heat pump operation time S0 comes, the controller 100 starts the first heat pump operation process (see FIG. 3) to be described later.

In addition, the controller 100 specifies the second heat pump operation time B0, which is the time before the second predetermined time? Specified from the water supply start time B1. In the present embodiment, when the second heat pump operation time B0 comes, the controller 100 starts the second heat pump operation process (to be described later) (see FIG. 4).

In addition, the controller 100 specifies the heat pump stop time G0, which is the time before the third predetermined time? Specified from the hot water supply end time G1. In the present embodiment, when the heat pump stop time (G0) comes, the controller 100 starts the heat pump stop processing to be described later.

(First heat pump operation process)

Fig. 3 is a flowchart showing the contents of the first heat pump operation process executed by the controller 100. Fig. As described above, when the first heat pump operation time S0 comes, the controller 100 starts the processing of Fig. First, in S10, the controller 100 selects a thermistor corresponding to the first hot water supply quantity Q1 of the thermistors 12, 14, 16, 18 mounted on the tank 10. [ In this embodiment, since the first hot water supply quantity Q1 is 30L, the controller 100 selects the thermistor 16 corresponding to 30L.

In step S12, the controller 100 determines whether the temperature measured by the thermistor 16 selected in step S10 (i.e., the water temperature at the position 30L from the top of the tank 10) is higher than a predetermined threshold value TA .

In the present embodiment, the predetermined threshold value TA is the " boiling set temperature -10 DEG C ". The boiling set temperature is, for example, 47 占 폚. Therefore, the predetermined threshold value TA is, for example, 37 占 폚. If YES in S12, at least the water temperature at the 30L position from the top of the tank 10 is higher than the threshold TA (e.g., 37 DEG C). As described above, a high-temperature water layer is formed on the upper portion of the tank 10, and a low-temperature water layer is formed on the lower portion. Therefore, when it is determined as YES in S12, hot water of a high temperature near the boiling set temperature (for example, 47 DEG C) is stored between the 30L position of the tank 10 and the upper portion of the tank. That is, when it is determined as YES in S12, it means that hot water of an amount (about 5L to 20L) necessary for the first hot water supply to be executed at the time near the hot water supply start time S1 is stored in the tank 10. If YES is determined in S12, the process proceeds to S18. On the other hand, if NO is determined in S12, the process proceeds to S14.

In S14, the controller 100 determines whether or not the heat pump 50 is operating. When the heat pump 50 is operating, the controller 100 determines YES in S14 and returns to S12. In this case, the controller 100 continues the boiling operation in which the water in the tank 10 is heated by the heat pump 50. On the other hand, when the heat pump 50 is not operating, the controller 100 determines NO in S14 and proceeds to S16.

In S16, the controller 100 operates the heat pump 50. [ In addition, the controller 100 rotates the circulation pump 22. That is, the controller 100 starts the boiling operation described above. Thereby, water present in the lower portion of the tank 10 is introduced into the tank water circulation passage 20, the introduced water is heated by the heat pump 50, and the heated water is returned to the upper portion of the tank 10 Loses. As a result, hot water is stored in the tank (10). After the heat pump 50 is operated in S16, the process returns to S12 and the controller 100 determines that the temperature measured by the thermistor 16 becomes higher than the predetermined threshold value TA And the water of the first hot water supply amount Q1 is stored at a water temperature higher than a predetermined threshold value TA. When the temperature measured by the thermistor 16 becomes higher than the predetermined threshold TA (YES in S12), the process proceeds to S18.

In S18, the controller 100 stops the heat pump 50 and the circulation pump 22. As described above, when it is judged YES in S12, hot water of the amount necessary for the first hot water supply (the first hot water supply quantity (Q1, 30L)) is stored in the tank 10.

When the first hot water supply operation is performed at a time near the hot water supply start time (S1) after the start of the first heat pump operation process of FIG. 3, the hot water in the upper part of the tank 10 flows through the supply path . As described above, in the hot water supply system 2 of the present embodiment, hot water necessary for hot water supply can be stored in the tank 10 at the hot water supply start time (S1). That is, by activating the heat pump 50 only during that time, it becomes possible to store the amount of hot water required for hot water supply into the tank 10 at the time of the hot water supply start time S1 It is time.

(Second heat pump operation process)

Fig. 4 is a flowchart showing the contents of the second heat pump operation process executed by the controller 100. Fig. As described above, when the second heat pump operation time B0 comes, the controller 100 starts the processing of Fig. The controller 100 determines whether the temperature measured by the thermistor 24 (that is, the temperature of the water derived from the lower portion of the tank 10 and passing through the heat pump 50) reaches a predetermined threshold value TB (That is, whether or not the tank 10 is in a full state). If YES is determined in S30, the process proceeds to S38. On the other hand, if NO is determined in S30, the process proceeds to S32.

In S32, the controller 100 operates the heat pump 50. [ In addition, the controller 100 rotates the circulation pump 22. That is, the controller 100 starts the boiling operation described above. When the heat pump 50 and the circulation pump 22 are already operating at the time of S32, the controller 100 continues to operate the heat pump 50 and the circulation pump 22. When S32 is finished, the process proceeds to S34.

On the other hand, in S38, the heat pump 50 and the circulation pump 22 are stopped. As described above, when it is determined as YES in S30, the tank 10 is in a state of being in a state of being enlarged. Thereby, there is no need to operate the heat pump 50 and the circulation pump 22 further. When S38 ends, the process proceeds to S34.

In S34, the controller 100 determines whether or not the water supply start time (B1) has arrived. If YES is determined in S34, the flow proceeds to S36 to start the water supply process (see Fig. 5). On the other hand, if NO in S34, the process returns to S30.

In the present embodiment, when the hot water of the boiling set temperature is not sufficiently stored in the tank 10 at the time when the second heat pump operation process of Fig. 4 is started, the heat pump 50 is operated , The water supply start time B1 comes before the tank 10 becomes full (YES in S34). That is, in the present embodiment, when the heat pump 50 is operated at the second heat pump operation time B0 (S32), the controller 100 determines that the thermistor 24 The second predetermined time? Is set so that the temperature at which the temperature is lower than the predetermined threshold value TB.

(Water supply processing)

As described above, when the water supply start time (B1) comes, in S36, the controller 100 starts the water supply processing. 5 is a flowchart showing contents of the water supply process. In the present embodiment, an example is explained in which the water supply start process is automatically started when the water supply start time (B1) comes. However, in the modification example, when a predetermined water supply start operation is performed by the user, Processing may be started.

In S50 of Fig. 5, the controller 100 starts the water supply operation. That is, the controller 100 opens the hot water supply valve 46 of the bathtub to start the supply of hot water to the bathtub. Then, in S52, the controller 100 determines whether or not the heat pump 50 is operating. As described above, when the tank 10 is not in a full-scale state at the time when the water supply start time B1 has come, the heat pump 50 continues to operate. In this case, the controller 100 determines YES in S52 and proceeds to S58. On the other hand, in the case where the tank 10 is at a full state at the time when the water supply start time B1 has come, the heat pump 50 is stopped. In this case, the controller 100 determines NO in S52 and proceeds to S54.

In S54, the controller 100 monitors that the temperature measured by the thermistor 16 becomes lower than a predetermined threshold value TA. If YES in S54, the flow advances to S56. If YES in S54, it means that the amount of hot water (hot water having a temperature higher than the threshold value TA) stored in the tank 10 as a result of the water supply operation operation has decreased to 30 L or less. In S56, the controller 100 operates the heat pump 50 and rotates the circulation pump 22.

In step S58, the controller 100 monitors that the temperature measured by the thermistor 12 (that is, the water temperature at the 6L position from the top of the tank 10) falls below the bath set temperature. If YES in S58, it means that the amount of hot water (hot water at a temperature higher than the bath set temperature) stored in the tank 10 has decreased to 6L or less. Hereinafter, this state may be referred to as " hot water exhaustion state ". In this embodiment, hot water of 150 L to 180 L is required in the water supply operation. As described above, in the present embodiment, since the capacity of the tank 10 is 100L, the hot water exhaustion state (YES in S58) necessarily occurs during the water supply operation. When it is judged YES in S58 (that is, in the case of the hot water exhaustion state), the flow proceeds to S60.

In S60, the controller 100 operates the combustion device 60. [ Also in this case, the controller 100 continues to operate the heat pump 50 and the circulation pump 22. As a result, hot water heated by the heat pump 50 and the combustion device 60 is supplied to the bath.

Subsequently, in S62, the controller 100 monitors completion of the water supply operation. When the hot water of a predetermined amount (for example, 150 L) is supplied to the bathtub, the controller 100 determines YES in S62 and proceeds to S64.

In S64, the controller 100 stops the combustion device 60 operated in S60. Also in this case, the controller 100 continuously operates the heat pump 50 and the circulation pump 22 for a predetermined time. When S64 is finished, the water supply process of Fig. 5 ends. At the same time, the process of Fig. 4 is also ended. As described above, in the hot water supply system 2 of this embodiment, it is possible to store a part of the hot water necessary for supplying the hot water in the tank 10 at the start time (B1) of the hot water supply start time. That is, by operating the heat pump 50 only during that time, the second predetermined time? Is the time at which the necessary amount of hot water can be stored in the tank 10 at the start point of the water supply start time Bl to be.

As described above, when the controller 100 activates the heat pump 50 at the second heat pump operation time B0 (S32), the controller 100 determines that the thermistor 24 The second predetermined time? Is set so that the temperature at which the temperature is lower than the predetermined threshold value TB. Therefore, when the tank 10 is not in a full-up state at the time when the water supply start time B1 has arrived, even after the supply of hot water to the bath is started (S50 in Fig. 5), the heat pump 50 And continues to operate (YES in S52 of FIG. 5). In this case, the hot water can be supplied to the bath while the water is heated by the heat pump 50 and stored in the tank 10. On the other hand, when the heat pump 50 is stopped (NO in S52 of FIG. 5) at the start time B1 of the drinking water supply, it takes a long time to operate the heat pump 50 again (S56). When the heat pump 50 continues to operate at the start time B1 of blast water supply (YES in S52 of Fig. 5), the heat pump 50 It is possible to suppress the frequent stoppage and restart of the heat pump 50 as compared with the case where it is stopped (NO in S52 of Fig. 5). That is, it is possible to reduce the loss due to the stoppage and re-operation of the heat pump 50, thereby increasing the energy efficiency and suppressing the deterioration of the durability of the heat pump 50.

(Heat pump stop processing)

When the heat pump stop time G0 comes, the controller 100 starts the heat pump stop process (not shown). That is, the controller 100 stops the heat pump 50 when the heat pump 50 is operating at the time of the heat pump stop time (G0). When the heat pump 50 is not operating, the controller 100 stops the heat pump 50 as it is. The controller 100 does not operate the heat pump 50 until the next day when the heat pump 50 is stopped at the heat pump stop time G0. Thereafter, the last hot water supply operation ends at the time near the hot water supply end time (G1). Therefore, in the hot water supply system 2 of the present embodiment, it is possible not to store the excess hot water in the tank 10 at the hot water supply end time G1. That is, the third predetermined time? Does not operate the heat pump 50 during the time so that it is possible not to store the excess hot water in the tank 10 at the time of the hot water supply end time G1 It is time.

In the above, the controller 100 may specify the average time of the hot water supply start time in the past seven days from the hot water history of the past seven days as the hot water supply start time (S1). Similarly, the controller 100 may specify the average time of the water supply start time in the past seven days from the hot water history of the past seven days as the water supply start time (B1). Further, the controller 100 may specify the average time of the hot water supply end time in the past seven days from the hot water history of the past seven days as the hot water supply end time (G1).

In the above description, the controller 100 is not limited to the above-described method and may be configured to set the first predetermined time? By arbitrary methods, if the temperature TW is higher and the first hot- . Therefore, for example, the controller 100 may calculate the first predetermined time? By executing a predetermined calculation using the temperature TW. Similarly, if the controller 100 specifies a shorter time as the temperature TW increases, the controller 100 may specify the second predetermined time? By an arbitrary method. Further, if the controller 100 specifies a longer time as the temperature TW increases, the controller 100 may specify the third predetermined time? By an arbitrary method.

In this case, instead of the water temperature TW measured by the thermistor 32, the controller 100 calculates the first predetermined time?, The second predetermined time? (?) Based on the outside air temperature measured by the outside air temperature sensor 52, ), The third predetermined time? May be specified. The controller 100 calculates the first predetermined time?, The second predetermined time?, The third predetermined time?, And the third predetermined time? Based on the temperature measured by the thermistor 32 and the outside air temperature measured by the outside air temperature sensor 52 (?) may be specified.

(Comparison between actual data and standard data)

As shown in Fig. 6, in the hot water supply system 2 of the present embodiment, the hot water supply pattern for the standard time zone and the hot water supply pattern for the actual time zone can be displayed in a comparable manner in the user terminal 110. [ In the example shown in Fig. 6, a graph 116 of the amount of electricity used, the amount of gas used and the amount of the hot water used by the standard time slot on the screen 112 of the user terminal 110 (indicated with a label "standard" in FIG. 6) , A graph (114, in addition to the label "YOU" in FIG. 6) of the electricity consumption amount, the gas consumption amount, and the hot water supply usage amount by the actual time period are displayed in the order of the top and bottom. In the hot water supply system 2 of the present embodiment, the user terminal 110 acquires the hot water supply history of each day in the past predetermined period (for example, one month) from the controller 100, The gas consumption amount, and the average value of the hot water usage amount, thereby obtaining the hot water supply pattern for each actual time zone. In addition, the user terminal 110 obtains a standard hot-water supply pattern by time zone by downloading it from a database (not shown) via the Internet or the like. The user of the hot water supply system 2 can view and compare the standard hot water supply hot water pattern 116 and the actual hot water hot water supply hot water pattern 114 through the user terminal 110, And understand how to improve his / her hot water supply pattern in order to save energy. It is also possible to calculate the average value of the electricity consumption amount, the gas consumption amount and the hot water supply usage amount in each time zone from the hot water supply history of each day in the past predetermined period, The process of storing the standard hot-water pattern by time slot may be executed by the controller 100 instead of the user terminal 110. [

In addition, a standard hot-water supply pattern may be selected among a plurality of hot-water supply patterns suitable for a user of the hot water supply system 2. For example, a plurality of hot water supply patterns corresponding to the number of constitutional members, residential areas, seasons, etc. of the user household can be prepared as a standard hot water supply pattern for each time period so that the user can select one of the plurality of hot water supply patterns The user terminal 110 may be configured to be selectable.

(Show advice)

As shown in Fig. 7, in the hot water supply system 2 of the present embodiment, the user terminal 110 can display advice for the user of the hot water supply system 2. [ In the example shown in Fig. 7, the ratio of the light / heat ratio in the case of hot water supply using only the combustion device 60 without using the heat pump 50 in the standard hot water pattern on the screen 112 of the user terminal 110 118 and the label "gas only" in FIG. 7) and the heat pump 50 and the combustion device 60 in the standard hot water pattern in combination, And the light / heat ratio 122 (in addition to the label " You " in FIG. 7) in the actual hot water supply pattern are displayed in a list and displayed on the screen 112, And a consultation door 124 is displayed in the lower part.

As shown in FIGS. 8 and 9, a plurality of advice statements 124 and display conditions of the advice statements 124 are stored in association with each other in the user terminal 110. The user terminal 110 determines whether or not the associated display condition is satisfied for each advisory statement 124 and displays the advisory statement 124 satisfying all the display conditions on the screen 112. [ Quot; standard hot water supply amount ", " standard hot water supply amount ", and " standard hot water use frequency " in Figs. 8 and 9 are the light / heat ratio based on the standard hot water supply pattern, And the number of hot water use.

8, in the hot water supply system 2 of the present embodiment, when the hot water supply set temperature is equal to or higher than a predetermined temperature (for example, 43 캜), the user terminal 110 lowers the hot water supply set temperature And a consultation statement 124 indicating that the light / heat ratio can be saved is displayed.

As shown in No. 2 of FIG. 8, in the hot water supply system 2 of the present embodiment, when the bath set temperature is equal to or higher than a predetermined temperature (for example, 43 캜), the user terminal 110 lowers the bath set temperature And a consultation statement 124 indicating that the light / heat ratio can be saved is displayed.

As shown in No. 3 of FIG. 8, in the hot water supply system 2 of the present embodiment, when the warm keeping setting time is equal to or longer than a predetermined time (for example, 4 hours), the user terminal 110 The advisory statement 124 indicating that the light / heat ratio can be saved is displayed.

As shown in No. 4 of Fig. 8, in the hot water supply system 2 of the present embodiment, when the following three conditions are satisfied, it is possible to reduce the difference between the hot water supply start time and the hot water supply end time, The advisory statement 124 is displayed.

(1) The light / heat ratio of this month is more than the standard light / heat ratio multiplied by a predetermined coefficient (for example, 1.05).

(2) The time difference between the earliest time and the latest time is at least a predetermined time difference (for example, two hours) at the hot water supply start time of the past predetermined period (for example, seven days).

(3) The time difference between the earliest time and the latest time is at least a predetermined time difference (for example, two hours) at the hot water supply end time of the past predetermined period (for example, seven days).

As shown in No. 5 of FIG. 8, in the hot water supply system 2 of the present embodiment, when the following three conditions are satisfied, it is possible to reduce the deviation of the hot water supply start time to the earliest time, The advisory statement 124 is displayed.

(1) The light / heat ratio of this month is more than the standard light / heat ratio multiplied by a predetermined coefficient (for example, 1.05).

(2) The time difference between the earliest time and the latest time is at least a predetermined time difference (for example, two hours) at the hot water supply start time of the past predetermined period (for example, seven days).

(3) At the hot water supply start time of the past predetermined period (for example, 7 days), the earliest time is before the predetermined time (for example, 5:00).

As shown in No. 6 of Fig. 8, in the hot water supply system 2 of the present embodiment, when the following three conditions are satisfied, it is possible to reduce the deviation of the hot water supply end time to the late time, The advisory statement 124 is displayed.

(1) The light / heat ratio of this month is more than the standard light / heat ratio multiplied by a predetermined coefficient (for example, 1.05).

(2) At the hot water supply end time of the past predetermined period (for example, 7 days), the time difference between the earliest time and the latest time is at least a predetermined time difference (for example, two hours).

(3) At the hot water supply end time of the past predetermined period (for example, 7 days), the latest time is after a predetermined time (for example, 24:00).

As shown in No. 7 of FIG. 8, in the hot water supply system 2 of the present embodiment, when the following two conditions are satisfied, by reducing the deviation of the hot water supply usage from the hot water supply start time to the hot water supply start time, A consultation statement 124 is displayed to the effect that saving is possible.

(1) The light / heat ratio of this month is more than the standard light / heat ratio multiplied by a predetermined coefficient (for example, 1.05).

(2) When the difference between the usage amount of the largest number of days and the usage amount of the smallest number of days is equal to or more than a predetermined amount (for example, 30 L) for the hot water usage from the hot water supply start time of the past predetermined period to be.

As shown in No. 8 of Fig. 8, in the hot water supply system 2 of the present embodiment, when the following two conditions are satisfied, the amount of hot water supply from the hot water supply start time to the hot water supply start time is reduced, The advice 124 of this effect is displayed.

(1) The light / heat ratio of this month is more than the standard light / heat ratio multiplied by a predetermined coefficient (for example, 1.05).

(2) The hot water supply usage from the hot water supply start time of the past predetermined period (for example, 7 days) to the start of hot water supply is equal to or more than a value obtained by multiplying the standard hot water supply usage by a predetermined coefficient (for example, 1. 10).

As shown in No. 9 of Fig. 8, in the hot water supply system 2 of the present embodiment, when the following two conditions are satisfied, it is possible to reduce the water supply amount, Display.

(1) The light / heat ratio of this month is more than the standard light / heat ratio multiplied by a predetermined coefficient (for example, 1.05).

(2) the water supply amount in the past predetermined period (for example, 7 days) is equal to or more than a value obtained by multiplying the standard water supply amount by a predetermined coefficient (for example, 1. 10).

As shown in No. 10 in Fig. 8, in the hot water supply system 2 of the present embodiment, when the following two conditions are satisfied, by reducing the hot water supply from the hot water supply end time to the hot water supply end time, The advice 124 of this effect is displayed.

(1) The light / heat ratio of this month is more than the standard light / heat ratio multiplied by a predetermined coefficient (for example, 1.05).

(2) The amount of hot water supply from the end of hot water supply for a predetermined period (for example, 7 days) in the past to the hot water supply end time is equal to or higher than a value obtained by multiplying the standard hot water supply amount by a predetermined coefficient (for example, 1. 10).

As shown in No. 11 of Fig. 9, in the hot water supply system 2 of the present embodiment, at the hot water supply start time of the past predetermined period (for example, 7 days), the time difference between the earliest time and the latest time When the time difference is equal to or larger than the time difference (for example, 3 hours), the advisory statement 124 indicating that the light / heat ratio can be saved by reducing the variation in the bathing time is displayed.

As shown in No. 12 in Fig. 9, in the hot water supply system 2 of the present embodiment, when the following two conditions are satisfied, it is possible to reduce the number of times of hot water supply in the morning, 124).

(1) The light / heat ratio of this month is more than the standard light / heat ratio multiplied by a predetermined coefficient (for example, 1.05).

(2) The number of times of hot water use in the morning in the past predetermined period (for example, 7 days) is equal to or more than a value obtained by multiplying the number of times of using standard hot water in the morning by a predetermined coefficient (for example, 1.15).

As shown in No. 13 of FIG. 9, in the hot water supply system 2 of the present embodiment, when the following two conditions are satisfied, it is possible to reduce the number of times of hot water supply in the afternoon, 124).

(1) The light / heat ratio of this month is more than the standard light / heat ratio multiplied by a predetermined coefficient (for example, 1.05).

(2) The number of times of hot water use in the afternoon for a predetermined period of time (for example, seven days) in the past is equal to or more than a value obtained by multiplying the number of times of using standard hot water in the afternoon by a predetermined coefficient (for example, 1.15).

As shown in No. 14 of FIG. 9, in the hot water supply system 2 of the present embodiment, when the light / heat ratio of this month is equal to or larger than a value obtained by multiplying the standard light / heat ratio by a predetermined coefficient (for example, 1.05) The advice statement 124 is displayed.

As shown in No. 15 of FIG. 9, in the hot water supply system 2 of the present embodiment, when the light / heat ratio of this month is equal to or less than a value obtained by multiplying the standard light / heat ratio by a predetermined coefficient (for example, 0.95) And a consultation statement 124 indicating that it is sufficiently executed is displayed.

As described above, the hot water supply system 2 of the present embodiment includes a tank 10 for storing water, a heat pump 50 for heating water by absorbing heat from the natural environment, A combustion apparatus 60 for heating water by the combustion of the fuel gas, a controller 100, and a user communicable with the controller 100. The circulation pump 22, And a terminal 110. The controller 100 can perform boiling operation in which water is heated by the heat pump 50 while circulating water between the tank 10 and the heat pump 50 by the circulation pump 22. The controller 100 is configured to set a schedule for boiling operation based on the history of the hot water supply in the hot water supply system 2 in the past. As shown in No. 4, No. 5, No. 6, No. 7, No. 7, and No. 11 in FIG. 9, the user terminal 110 has the history of the past hot water supply of the hot water supply system 2 In a large case, it is configured to present advice to the user.

In the hot water supply system 2 of the present embodiment, the controller 100 determines whether or not the first heat pump operation time (S0, boiling operation schedule) shown in Fig. 2 ) Is set to be set. As shown in Nos. 4 and 5 of Fig. 8, the user terminal 110 is configured to present advice to the user when the deviation of the history of the hot water supply start time of the hot water supply system 2 in the past is large .

In the hot water supply system 2 of the present embodiment, the controller 100 determines whether or not the second heat pump operation time (B0, the schedule of the boiling operation (Corresponding to " 1 " As shown in No. 11 of FIG. 9, the user terminal 110 is configured to present advice to the user when the history of the hot water supply start time of the hot water supply system 2 is large.

In the hot water supply system 2 of the present embodiment, the controller 100 calculates the heat pump stop time (G0, corresponding to the schedule of boiling operation) shown in Fig. 2 based on the history of the hot water supply end time of the hot water supply system 2 ). As shown in Nos. 4 and 6 of Fig. 8, the user terminal 110 is configured to present advice to the user when the history of the hot water supply end time of the hot water supply system 2 has a large deviation .

In the hot water supply system 2 of the present embodiment, the controller 100 is configured to specify the first predetermined time? Shown in Fig. 2 based on the first hot water supply quantity Q1. Thus, a schedule for boiling operation is set, and a boiling amount of boiling operation is set. That is, the controller 100 is configured to set the boiling amount of the boiling operation based on the past history of the hot water supply usage of the hot water supply system 2. The boiling amount of the boiling operation corresponds to the amount of the hot water stored in the tank 10 by heating the water in the tank 10 by the heat pump 50 in boiling operation. As the first hot water supply quantity Q1 increases, the first predetermined time? Becomes longer and the first heat pump operation time S0 becomes faster, so that the boiling operation boiling amount becomes larger. Conversely, the smaller the first hot water supply quantity Q1, the smaller the boiling operation boiling operation amount. As shown in No. 7 of Fig. 8, the user terminal 110 is configured to present advice to the user when the history of the hot water supply usage of the hot water supply system 2 has a large deviation.

The user terminal 110 of the hot water supply system 2 of the present embodiment is arranged in the past of the hot water supply system 2 as shown in Figs. When the light / heat ratio calculated on the basis of the history of the hot water supply of the outdoor unit exceeds a predetermined value.

The embodiments of the present invention have been described in detail above, but these are merely examples and do not limit the claims of the present invention. The techniques described in the claims include various modifications and changes to the concrete examples illustrated above.

The technical elements described in this specification or the drawings exert their technical usefulness alone or in various combinations and are not limited to the combinations described in the claims at the time of filing. The technology described in the present specification or drawings can achieve a plurality of objectives at the same time, and achieving one of the objectives itself has technical usefulness.

2: hot water supply system 10: tank
12: Thermistor 14: Thermistor
16: Thermistor 18: Thermistor
20: tank water circulation passage 22: circulation pump
24: thermistor 30: tap water introduction path
30a: first introduction route 30b: second introduction route
31: tap water supply source 32: thermistor
40: supply passage 42: mixing valve
44: thermistor 46: hot water supply valve
50: Heat pump 52: Outside temperature sensor
60: Combustion apparatus 100: Controller
110: user terminal 112: screen
114: Graph 116: Graph
118: Utilities 120: Utilities
122: Utilities 124: Advice Door

Claims (6)

As a hot water supply system,
A tank for storing water,
A heat pump for heating water by absorbing heat from a natural environment,
Circulation means for circulating water between the tank and the heat pump,
A combustion device for heating water by combustion of the fuel gas,
A controller,
And a user terminal capable of communicating with the controller,
The controller can perform boiling operation in which water is heated by the heat pump while circulating water between the tank and the heat pump by the circulation means,
The controller is configured to set a schedule of boiling operation based on the past history of hot water supply of the hot water supply system,
Wherein the user terminal is configured to present advice to the user when the history of the hot water supply in the hot water supply system is large.
The method according to claim 1,
The controller is configured to set a schedule of boiling operation based on the history of the hot water supply start time of the hot water supply system in the past,
Wherein the user terminal is configured to present advice to the user when the history of the hot water supply start time of the hot water supply system is large.
The method according to claim 1,
The controller is configured to set a schedule of boiling operation based on the past history of the hot water supply start time of the hot water supply system,
Wherein the user terminal is configured to present advice to the user when the history of the hot water supply start time of the hot water supply system is large.
The method according to claim 1,
The controller is configured to set a schedule of boiling operation based on the history of the hot water supply end time of the hot water supply system in the past,
Wherein the user terminal is configured to present advice to the user when the deviation of the history of the hot water supply end time of the hot water supply system in the past is large.
The method according to claim 1,
The controller is configured to set the boiling amount of the boiling operation based on the past history of the hot water usage of the hot water supply system,
Wherein the user terminal is configured to present advice to the user when the history of the hot water supply usage of the hot water supply system in the past is large.
The method according to any one of claims 1 to 5,
Wherein the user terminal is configured to present advice to the user when the light / heat ratio calculated based on the past hot water supply history of the hot water supply system exceeds a predetermined value.

Images