KR101621172B1 - Hot water supply system - Google Patents

Abstract

A hot water supply system comprising a tank for storing hot water heated in a first heating source and a second heating source for heating hot water sent from a tank to a hot water spot, Provides a technique that allows the user to grasp accurately.
[MEANS FOR SOLVING THE PROBLEMS] The hot water supply system disclosed in this specification comprises a first heating source for heating hot water, a tank for storing hot water heated in the first heating source, a hot water temperature acquiring means for acquiring a hot water temperature that can be supplied from the tank A second heating source for heating the hot water sent from the tank to the hot water spot, and a display device for displaying the state of the system including the tank lowering amount. In the hot water supply system, when the temperature of the hot water that can be supplied from the tank is higher than the reference temperature based on the hot water setting temperature, the display device displays the system status in the first display form, and the temperature of the hot water, The display device displays the system status in the second display form.

Description

HOT WATER SUPPLY SYSTEM

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

Patent Document 1 discloses a method of controlling the amount of water contained in a tank, including a first heating source for heating hot water, a tank for storing hot water heated in the first heating source, a second heating source for heating the hot water sent to the hot water spot in the tank, And a display device for displaying the system status of the system. In the hot water supply system, since the remaining amount of the hot water heated by the first heating source is displayed as the tank lowering amount, the user can determine whether the energy consumed by the hot water supply originates from the first heating source or from the second heating source Can be grasped properly.

Patent Document 1: JP-A-2011-149656

In such a hot water supply system, there is a case where the heating by the second heating source must be carried out although a sufficient amount of low-temperature water remains in the tank. For example, when the temperature of the hot water that can be supplied from the tank is lower than the hot water setting temperature due to the natural heat radiation from the tank or the change of the hot water supply set temperature, even if a sufficient amount of low water remains in the tank, It is necessary to perform heating by the second heating source in order to perform hot water supply. Many users of the hot water supply system think that heating by the second heating source is unnecessary if a sufficient amount of hot water remains in the tank, so that the user gives a strange impression in such a case. A technique capable of precisely grasping the user of heating by the second heating is expected.

In the present specification, in a hot water supply system having a tank for storing hot water heated in a first heating source and a second heating source for heating hot water sent to a hot water spot in the tank, Provides a technique that allows the user to grasp accurately.

The hot water supply system disclosed in this specification comprises a first heating source for heating hot water, a tank for storing the hot water heated in the first heating source, a hot water temperature obtaining means for obtaining the temperature of the hot water that can be supplied from the tank, A second heating source for heating the hot water to be sent to the hot water spot, and a display device for displaying the system state including the tank lowering amount. In the hot water supply system, when the temperature of the hot water that can be supplied from the tank is higher than the reference temperature based on the hot water setting temperature, the display device displays the system status in the first display form, and the temperature of the hot water, The display device displays the system status in the second display form. Here, the tank bottom amount referred to herein refers to the amount of hot water having a temperature equal to or higher than a predetermined lower limit temperature among the hot water stored in the tank. For example, the amount of hot water having a temperature equal to or higher than the lower limit temperature that can be set as the hot water setting temperature among the hot water stored in the tank may be set as the tank lowering amount. Alternatively, among the tap water stored in the tank, the amount of tap water having the temperature higher than the tap water temperature from the external tap water source such as tap water may be set as the tank tap volume.

In the above-described hot water supply system, when the temperature of the hot water that can be supplied from the tank is equal to or higher than the reference temperature and when the temperature of the hot water that can be supplied from the tank is lower than the reference temperature, The reference temperature is specified based on the hot water setting temperature. The reference temperature may be, for example, the hot water setting temperature itself, or may be a temperature obtained by adding a predetermined temperature to the hot water setting temperature. If the temperature of the hot water that can be supplied from the tank is equal to or higher than the reference temperature, it is possible to perform the hot water supply at the hot water setting temperature without performing the heating by the second heating source at present. Conversely, if the temperature of the hot water that can be supplied from the tank is lower than the reference temperature, it is necessary to heat by the second heating source in order to perform the hot water supply at the hot water setting temperature. Thus, in the above-described hot water supply system, when the temperature of the hot water that can be supplied from the tank is equal to or higher than the reference temperature, the display device displays the system state as the first display form, and when the temperature of the hot water that can be supplied from the tank is lower than the reference temperature , The display device displays the system status in the second display form. With this configuration, the user can accurately grasp whether or not the hot water supply system is capable of hot water supply without performing the heating by the second heating source, from the display form of the system state.

The hot water supply system described above can be configured so that the display device displays the system status in the second display form even when the temperature of the hot water that can be supplied from the tank is higher than the reference temperature when the tank stock amount is smaller than the reference hot water amount.

In the hot water supply operation of the hot water supply system, heating by the second heating source may be carried out even if the temperature of the hot water that can be supplied from the tank is equal to or higher than the reference temperature. If the hot water of the tank is used up and then the heating is switched to the heating by the second heating source, the temperature of the hot water is temporarily lowered when the pipe group of the second heating source is cold. In order to cope with this, when heating is carried out by the second heating source at a time when hot water still remains at a high temperature in the tank, and the pipe group of the second heating source is warmed by the hot water from the tank, It is possible to prevent the temperature of the hot water supply from lowering when it occurs. Therefore, in the hot water supply operation, when the amount of the stored water in the tank is smaller than the reference amount of water in the tank, heating by the second heating source may be performed even if the temperature of the hot water supplied from the tank is equal to or higher than the reference temperature. In such a case, even if the temperature of the hot water that can be supplied from the tank is equal to or higher than the reference temperature, the display device displays the system state in the second display form, As shown in FIG.

In the hot water supply system, when the elapsed time from the last hot water supply end exceeds the reference time, the display device displays the system status in the second display form even if the temperature of the hot water that can be supplied from the tank is higher than the reference temperature Can be configured.

It is assumed that the pipe group of the second heating source is cool when a certain amount of time has elapsed from the previous hot water supply operation. Therefore, even when the temperature of the hot water that can be supplied from the tank is equal to or higher than the reference temperature, the heating by the second heating source is performed when a certain amount of time has elapsed from the previous hot water supply operation, To warm the pipe group of the second heating source. In such a case, even if the temperature of the hot water that can be supplied from the tank is equal to or higher than the reference temperature, the display device displays the system state in the second display form, As shown in FIG.

The hot water supply system may further comprise an ambient temperature acquisition means for acquiring an ambient temperature, and the reference hot water amount and / or the reference time may be changed in accordance with the ambient temperature.

In the case where the hot water supply system is configured to perform heating by the second heating source when the amount of the bottom of the tank is smaller than the reference amount of hot water or when the elapsed time from the end of the last hot water supply operation exceeds the reference time , The reference amount of hot water or the reference time may be changed in response to the environmental temperature of the hot water supply system. The environmental temperature may be, for example, ambient temperature, or may be the water supply temperature from an external water supply source. For example, when the environmental temperature is lower than the predetermined temperature, the reference tank volume is set to a larger volume and / or the reference time is set to a shorter time, whereby the heating by the second heating source is started do. In such a case, by specifying the display form of the system state on the basis of the reference amount of the changed amount and / or the reference time corresponding to the environmental temperature, whether or not the heating by the second heating source is accurately reflected in the display form of the system state .

1 is a view schematically showing a configuration of a hot water supply system 2 according to an embodiment.
2 is a view showing the appearance of the remote control 6 according to the embodiment.
3 is a diagram showing an example of the display form of the low-temperature icon 104 according to the embodiment,
4 is a view showing another example of the display form of the low-temperature icon 104 according to the embodiment;
5 is a view showing another example of the display form of the low-temperature icon 104 according to the embodiment;

(Example)

1, the hot water supply system 2 according to the present embodiment includes an HP (heat pump) unit 4, a tank unit 6, and a burner unit 8. As shown in Fig.

The HP unit 4 is provided with a compressor 10, a condenser 12, an expansion valve 14, and an evaporator 16. The compressor (10) pressurizes the refrigerant to a high temperature and a high pressure. The condenser (12) cools the refrigerant by heat exchange with water. The expansion valve 14 reduces the pressure of the refrigerant to a low temperature and a low pressure. The evaporator (16) heats the refrigerant by heat exchange with the outside air. The HP unit 4 circulates the refrigerant (for example, refrigerant refrigerant) in the order of the compressor 10, the condenser 12, the expansion valve 14, and the evaporator 16, Heat it. The HP unit 4 further includes a circulation pump 18 for circulating water to the condenser 12, a return thermistor 20 for detecting the temperature of the water flowing into the condenser 12, A supply thermistor 22 for detecting the temperature of the water, an outside temperature thermistor 23 for detecting the temperature of outside air, and an HP controller 24 for controlling the operation of each component of the HP unit 4.

The tank unit 6 is provided with a tank 30, a mixing valve 32, and a bypass control valve 34. The tank 30 is an enclosed container whose outer side is covered with a heat insulating material and which stores water therein. The capacity of the tank 30 of this embodiment is, for example, 100 liters. When the circulation pump 18 of the HP unit 4 is driven, water is drawn from the bottom of the tank 30 and sent to the condenser 12. Water heated to a high temperature in the condenser 12 is returned into the tank 30 at the top of the tank 30. [ When the water heated by the HP unit 4 flows into the tank 30, a thermally stable layer in which a layer of hot water is laminated on the layer of low temperature water is formed inside the tank 30. The tank 30 is provided with an upper thermistor 36 for detecting the temperature of the upper water, an intermediate thermistor 37 for detecting the temperature of the water in the middle portion and a lower thermistor 38 for detecting the temperature of the lower water . In the present embodiment, the upper thermistor 36 is arranged at a position of 6 liters from the top of the tank 30, the middle thermistor 37 is arranged at a position of 12 liters from the top of the tank 30, The thermistor 38 is disposed at a position of 3 liters from the top of the tank 30.

The tank unit 6 is supplied with tap water through a water supply path 40. The water supply path 40 is provided with a pressure reducing valve 42 for reducing the water supply pressure and an inlet water thermistor 44 for detecting the water supply temperature. The water supply path 40 branches into a tank water supply path 46 communicating with the bottom portion of the tank 30 and a tank bypass path 48 communicating with the mixing valve 32. Check valves 50 and 52 are mounted on the tank water supply path 46 and the tank bypass path 48, respectively. The tank bypass path 48 is provided with a water sensor 54 for detecting the flow rate of tap water flowing into the mixing valve 32. The top portion of the tank 30 and the mixing valve 32 communicate with each other through the tank tapping path 56. The tank tapping path 56 is equipped with a check valve 58 and a hot water side water quantity sensor 60 for detecting the flow rate of water from the tank 30 flowing into the mixing valve 32.

The mixing valve 32 mixes the tap water flowing from the tank bypass path 48 and the water from the tank 30 flowing from the tank tapping path 56 into the first hot water supply path 62. The mixing valve 32 drives the valve by the stepping motor and controls the opening degree on the side of the tank bypass path 48 (opening on the water side) and the opening degree on the side of the tank opening path 56 ). A mixed thermistor 64 for detecting the temperature of water discharged from the mixing valve 32 is mounted on the first hot water supply path 62.

From the tank unit 6, hot water supply to a hot water supply place such as a kitchen, a shower, or water (karan) is performed through the second hot water supply path 66. The second hot water supply path 66 is equipped with a hot water outlet thermistor 68 for detecting the temperature of water supplied to the hot water supply location and a check valve 70. The hot water supply path (72) communicates between the first hot water supply path (62) and the second hot water supply path (66). A bypass control valve 34 is mounted on the hot water supply bypass path 72.

The tank unit 6 further includes a tank controller 74 and a remote controller 76 capable of communicating with the tank controller 74. [ The tank controller 74 controls the operation of each component of the tank unit 6. The remote control 76 accepts various operation inputs from the user through a switch, a button, and the like. In addition, the remote control 76 notifies the user of various information regarding the setting and operation of the hot water supply system 2 by display and voice.

The burner unit 8 is provided with a burner 80, a heat exchanger 82, a bypass servo 84, a quantity servo 86, and a hot water supply valve 88. The burner 80 is a heat source for heating water flowing through the heat exchanger 82 by the combustion of gas. Water from the first hot water supply path 62 of the tank unit 6 flows into the heat exchanger 82 through the burner heating furnace 90. The water that has passed through the heat exchanger 82 flows out to the second hot water supply passage 66 of the tank unit 6 through the burner return passage 92. The burner furnace furnace 90 is equipped with a quantity servo 86 for adjusting the flow rate of water flowing into the heat exchanger 82. The burner bypass passage 90 and the burner bypass passage 92 communicate with each other through the burner bypass passage 94. A bypass servo 84 is attached to the connecting portion of the burner bypass path 90 and the burner bypass path 94. The bypass servo 84 adjusts the flow rate of the water flowing from the burner bypass path 90 to the burner bypass path 94. The burner return passage 92 is provided with a burner hot water supply thermistor 96 for detecting the temperature of water flowing out from the heat exchanger 82. A water supply path 98 is branched from the burner return passage 92. A hot water supply valve 88 is mounted on the hot water supply path 98. The molten metal is supplied from the burner unit 8 to the bathtub through which the hot water is supplied through the hot water supply path 98. The burner unit 8 further includes a burner controller 100 for controlling the operation of each component of the burner unit 8. [

The HP controller 24 and the tank controller 74 can communicate with each other. The tank controller 74 and the burner controller 100 can communicate with each other. Therefore, by performing the control in cooperation with the HP controller 24, the tank controller 74, and the burner controller 100, the hot water supply system 2 can perform various operations such as boiling operation and hot water supply operation have. Hereinafter, the HP controller 24, the tank controller 74, and the burner controller 100 are collectively referred to as a controller alone.

Hereinafter, boiling operation and hot water supply operation performed by the hot water supply system 2 will be described.

In boiling operation, the hot water supply system 2 drives the HP unit 4 to boil the water in the tank 30. The timing for starting the boiling operation can be set from various viewpoints. For example, the controller may determine the start timing of the boiling operation so that the boiling of water in the tank 30 is completed immediately before the time when an inexpensive night-time power is available ends. Alternatively, the controller may determine the start timing of the boil-off operation so that boiling of the water in the tank 30 is completed immediately before the time when a large hot water supply demand is expected based on the hot water performance until the previous day. Alternatively, the controller may start the boiling operation by instructing the user to boil the water in the tank 30 via the remote controller 76. [

When the boiling operation is started, the controller drives the compressor 10 to circulate the refrigerant in the order of the compressor 10, the condenser 12, the expansion valve 14 and the evaporator 16, And circulates water between the tank 30 and the condenser 12. [ Accordingly, the water sucked from the bottom of the tank 30 is heated to the boiling temperature in the condenser 12 and returned to the top of the tank 30. When the water in the tank 30 is replaced with heated water up to the boiling temperature, the controller ends the boiling operation.

In the hot water supply operation, water of the hot water supply set temperature is supplied to the hot water supply point. In the hot water supply system 2 of the present embodiment, for example, when the quantity (hot water supply quantity) obtained by adding the quantity detected by the water quantity sensor 54 and the quantity detected by the hot water quantity sensor 60 to a predetermined value or more , The hot water supply operation is started.

When the hot water supply operation is started, the controller determines whether or not the temperature detected by the upper thermistor 36 of the tank 30 is equal to or higher than the hot water setting temperature. When the temperature detected by the upper thermistor 36 is equal to or higher than the hot water setting temperature, the controller prohibits the burning operation of the burner 80 and sets the temperature detected by the mixing thermistor 64 to the hot water setting temperature, (32) is adjusted. In this case, the high-temperature water supplied from the upper portion of the tank 30 and the low-temperature tap water supplied from the water supply path are mixed to the hot water supply set temperature in the mixing valve 32 and supplied to the hot water supply point.

When the temperature detected by the upper thermistor 36 of the tank 30 is lower than the set temperature of the hot water supply, the controller 80 permits the burning operation of the controller burner 80, The opening degree of the mixing valve 32 is adjusted so that the temperature is slightly lower than the temperature. In this case, the high-temperature water supplied from the upper portion of the tank 30 and the low-temperature tap water supplied from the water supply path are mixed in the mixing valve 32 and then heated to the hot water setting temperature by the burner 80, .

In the hot water supply system 2 of the present embodiment, for example, when the quantity (hot water supply quantity) obtained by summing the quantity detected by the water quantity sensor 54 and the quantity detected by the hot water quantity sensor 60 is less than a predetermined value , It is determined that the hot water supply has ended. When the hot water supply is terminated, the controller prohibits the burning operation of the burner 80 and ends the hot water supply operation process.

2 shows an external view of the remote control 76. As shown in Fig. The remote controller 76 is provided with a display panel 102. The display panel 102 is, for example, a liquid crystal panel. The display panel 102 can display the system status such as the current time, the set temperature of the hot water (for example, the hot water set temperature), the lowered amount of the tank 30, and the like. In the hot water supply system 2 of the present embodiment, the low water level of the tank 30 is indicated by the low temperature icon 104. [ The lowering icon 104 includes an upper indicator 110, a middle indicator 112 disposed under the upper indicator 110, a lower indicator 114 disposed under the intermediate indicator 112, And an edge line 116 surrounding the indicator 110, the intermediate indicator 112, and the lower indicator 114.

The upper indicator 110 is turned on when the temperature of the lower thermistor of the tank 30 reaches 38 占 폚 or higher at the time of lighting off. The upper indicator 110 is turned off when the detection temperature of the lower thermistor of the tank 30 becomes lower than 36 占 폚. That is, the lighting of the upper indicator 110 means that the amount of the bottom of the tank 30 is 30 liters or more.

The intermediate indicator 112 is turned on when the detection temperature of the intermediate thermistor of the tank 30 reaches 38 占 폚 or higher at the time of lighting off. The intermediate indicator 112 is turned off when the detected temperature of the intermediate thermistor of the tank 30 becomes lower than 36 占 폚. That is, the lighting of the intermediate indicator 112 means that the amount of the bottom of the tank 30 is 12 liters or more.

The lower indicator 114 is turned on when the detection temperature of the upper thermistor of the tank 30 becomes 38 DEG C or higher at the time of lighting off. The lower indicator 114 is turned off when the detection temperature of the upper thermistor of the tank 30 becomes lower than 36 占 폚. That is, lighting of the lower indicator 114 means that the amount of the bottom of the tank 30 is 6 liters or more.

The border line 116 is always lit regardless of the display state of the upper indicator 110, the middle indicator 112, and the lower indicator 114. [

In the hot water supply system 2 of the present embodiment, when the temperature detected by the upper thermistor 36 is equal to or higher than the reference temperature and when the temperature detected by the upper thermistor 36 is lower than the reference temperature, Other. The reference temperature is specified based on the hot water setting temperature. The reference temperature may be, for example, the hot water setting temperature itself or may be a temperature obtained by adding a predetermined temperature (for example, 2 占 폚) to the hot water setting temperature. When the temperature detected by the upper thermistor 36 is equal to or higher than the reference temperature, it is possible to perform the hot water supply at the hot water setting temperature without executing the burning operation of the burner 80 at present. Conversely, if the temperature detected by the upper thermistor 36 is lower than the reference temperature, a burning operation of the burner 80 is required in order to perform hot water supply at the hot water setting temperature. Therefore, in the hot water supply system 2 of the present embodiment, when the temperature detected by the upper thermistor 36 is equal to or higher than the reference temperature, the low temperature icon 104 is displayed in the first display form, The low-temperature icon 104 is displayed in the second display form. Thus, the user can grasp whether or not the hot water supply system 2 can hot water the hot water without performing the burning operation of the burner 80, from the display form of the hot water icon 104. [

For example, in the first display mode, the brightness or the concentration at the time of lighting the upper indicator 110, the middle indicator 112, and the lower indicator 114 is increased, The luminance or the concentration at the time of lighting the upper indicator 110, the intermediate indicator 112 and the lower indicator 114 may be lowered. 3 (a) to 3 (h) illustrate the display form of the low-temperature icon 104 in this case. 3 (a), 3 (b), 3 (c) and 3 (d) show a display form (first display form) of the low temperature icon 104 when the temperature detected by the upper thermistor 36 is equal to or higher than the reference temperature have. 3 (a) shows a case where the bottom amount of the tank 30 is 30 liters or more, and the upper indicator 110, the middle indicator 112, and the lower indicator 114 are lit. 3B shows a case where the amount of the bottom of the tank 30 is less than 30 liters and the upper indicator 110 is off and the middle indicator 112 and the lower indicator 114 are lit have. 3C shows a case where the amount of the bottom of the tank 30 is 6 liters or more and less than 12 liters and the upper indicator 110 and the middle indicator 112 are OFF and the lower indicator 114 is ON have. 3 (d) shows a case where the amount of the bottom of the tank 30 is less than 6 liters, and the upper indicator 110, the middle indicator 112, and the lower indicator 114 are off. 3 (e), 3 (f), 3 (g) and 3 (h) show the display form (second display form) of the low temperature icon 104 when the temperature detected by the upper thermistor 36 is lower than the reference temperature have. 3 (a), 3 (b), 3 (c) and 3 (d), the lowering amount of the tank 30 in FIGS. Is equal to the amount of the bottom of the tank (30).

When the display panel 102 is capable of color display, the display mode of the low-temperature icon 104 is displayed in the first display mode when the upper indicator 110, the middle indicator 112 and the lower indicator 114 are turned on The intermediate indicator 112 and the lower indicator 114 are displayed in a warm color (for example, red), while in the second display form, the upper indicator 110, the middle indicator 112, Blue).

4 (a), the border line 116 is indicated by a solid line in the first display form and the border line 116 is displayed in the second display form, as shown in Fig. 4 (b) May be indicated by dashed lines.

Alternatively, as shown in Fig. 5 (a), in the first display form, a character string " high-temperature low temperature " is displayed in the vicinity of the rim 116, and as shown in Fig. 5 (b) In the display form, a character string " low temperature charge " may be displayed in the vicinity of the frame line 116.

In the hot water supply operation, the burner operation may be started even if the temperature detected by the upper thermistor 36 of the tank 30 is equal to or higher than the reference temperature. If the burning operation of the burner 80 is started after the high temperature hot water in the tank 30 is exhausted, the temperature of the hot water supply temporarily decreases when the pipe group of the burner unit 8 is cold. In order to cope with this, the burning operation of the burner 80 is started to start warming the pipe group of the burner unit 8 with the hot water from the tank 30 at the time when still hot water still remains in the tank 30 It is possible to prevent the hot water temperature from lowering when hot water in the tank 30 is exhausted. If the temperature of the hot water that can be supplied from the tank 30 is equal to or higher than the reference temperature because the pipe group of the burner unit 8 is assumed to be cold when a certain amount of time has elapsed from the previous hot water supply operation, 80, the pipe group of the burner unit 8 can be heated by the water from the tank 30. [ In the case of performing such operation, even when the temperature detected by the upper thermistor 36 of the tank 30 is equal to or higher than the reference temperature, when the condition for starting the burning operation of the burner 80 is satisfied, , The temperature detected by the upper thermistor 36 of the tank 30 may be displayed in the same display form (that is, the second display form) as in the case where the temperature is lower than the reference temperature.

(For example, 20 liters) or when the elapsed time from the end of the previous hot water supply operation is less than the reference time (for example, 20 minutes) in the hot water supply operation, The burning operation of the burner 80 may be started even if the temperature detected by the upper thermistor 36 is equal to or higher than the reference temperature. In this case, when the amount of the stored water in the tank 30 is smaller than the reference amount of water or the elapsed time from the end of the last hot water supply operation exceeds the reference time, even if the temperature detected by the upper thermistor 36 is equal to or higher than the reference temperature And the low-price icon 104 are displayed in the second display form. With this configuration, it is possible to accurately reflect the burning operation of the burner 80 on the display form of the warming-up icon 104.

Further, in such a case, the reference amount of hot water or the reference time may be changed in response to the environmental temperature of the hot water supply system 2. The ambient temperature may be, for example, the outside temperature detected by the outside temperature thermistor 23, or the water supply temperature detected by the incoming water thermistor 44. For example, when the environmental temperature is lower than a predetermined temperature (for example, 5 DEG C), the reference tank volume may be set to a larger amount (e.g., 30 liters) and / 10 minutes), the burning operation of the burner 80 is started at a proper timing. In this case, by specifying the display form of the low-temperature icon 104 on the basis of the reference amount of hot water and / or the reference time changed corresponding to the ambient temperature, it is possible to determine whether or not the burning operation of the burner 80 is appropriate, Can be accurately reflected in the display form of the display screen.

As described above, the hot water supply system 2 of the embodiment includes the HP unit 4 (corresponding to the first heating source) for heating the hot water, the tank 30 for storing the hot water heated by the HP unit 4, An upper thermistor 36 (corresponding to the hot water temperature obtaining means) for obtaining the temperature of the hot water which can be supplied from the tank 30 and a burner unit 8 for heating the hot water sent to the hot water spot in the tank 30 (Corresponding to a heating source), and a remote controller 76 (corresponding to a display device) for displaying the system state including the tank storage amount. In the hot water supply system 2, when the temperature of the hot water that can be supplied from the tank 30 is higher than the reference temperature based on the hot water supply set temperature, the remote controller 76 displays the system state in the first display form, 30 is lower than the reference temperature, the remote controller 76 displays the system status in the second display form.

Even when the temperature of the hot water that can be supplied from the tank 30 is higher than the reference temperature in the case where the tank level is lower than the reference level, the remote control 76 displays the system status in the second display mode As shown in FIG.

Even if the temperature of the hot water that can be supplied from the tank 30 is higher than the reference temperature when the elapsed time from the last time of the hot water supply exceeds the reference time, And display the status in the second display form.

The hot water supply system 2 of the embodiment has an outside temperature thermistor 23 (corresponding to the ambient temperature acquiring means) for acquiring the outside temperature (corresponding to the ambient temperature) and a water temperature acquiring (Corresponding to the ambient temperature acquiring means), and the reference tapping amount and / or the reference time may be changed in accordance with the outside air temperature or the water supply temperature.

Although the embodiments have been described in detail above, they are merely illustrative and do not limit the claims. The technology described in the claims includes various modifications and changes to the concrete examples illustrated above.

The technical elements described in this specification or the drawings exert their technical usefulness either singly or in various combinations, and are not limited to combinations of claim descriptions at the time of filing. The techniques exemplified in the specification or drawings are intended to achieve a plurality of objectives at the same time, and achieving one of them has technological usefulness.

2: hot water supply system 4: HP unit
6: tank unit 8: burner unit
10: compressor 12: condenser
14: expansion valve 16: evaporator
18: circulation pump 20: return thermistor
22: supply thermistor 23: outside temperature thermistor
24: HP controller 30: tank
32: Mixing valve 34: Bypass control valve
36: upper thermistor 37: middle thermistor
38: lower thermistor 40: water supply path
42: Pressure Reducing Valve 44: Intake Thermistor
46: tank water supply path 48: tank bypass path
50, 52: check valve 54: water side quantity sensor
56: tank brewing path 58: check valve
60: Wed water amount sensor 62: First hot water supply path
64: Mixed thermistor 66: Second hot water supply path
68: hot water outlet thermistor 70: check valve
72: hot water supply bypass path 74: tank controller
76: Remote control 80: Burner
82: Heat exchanger 84: Bypass servo
86: Quantity Servo 88: Water supply valve
90: Burner King 92: Burner Blower
94: Burner bypass path 96: Burner hot water thermistor
98: Water supply path 100: Burner controller
102: display panel 104:
110: upper indicator 112: middle indicator
114: Lower indicator 116: Border line

Claims (5)

A first heating source for heating the hot water,
A tank for storing the heated water heated in the first heating source,
When the temperature of the hot water that can be supplied from the tank is lower than the hot water setting temperature, the hot water to be supplied to the hot water spot in the tank is heated by the burning operation of the burner,
A hot water supply apparatus comprising a display device for displaying a hot water supply state including a tank lowering amount,
When the temperature of the hot water that can be supplied from the tank is higher than the reference temperature based on the hot water supply set temperature, the display device displays the hot water supply state as the first display corresponding to the hot water supply at the hot water set temperature without performing the burning operation of the burner And when the temperature of the hot water that can be supplied from the tank is lower than the reference temperature, the display device displays the hot water supply state in the second display form corresponding to the case where the burning operation of the burner is required so as to perform hot water supply at the hot water supply set temperature And a display unit for displaying the hot water.
The method according to claim 1,
Wherein the display device displays the hot water supply state in the second display form even when the temperature of the hot water that can be supplied from the tank is higher than the reference temperature when the tank water amount is smaller than the reference hot water amount.
The method according to claim 1 or 2,
The display device displays the hot water supply state in the second display form even when the temperature of the hot water that can be supplied from the tank is higher than the reference temperature when the elapsed time from the last hot water supply end exceeds the reference time. Device.
The method of claim 2,
And environmental temperature acquisition means for acquiring an ambient temperature,
Wherein the reference tank amount is changed corresponding to the environmental temperature.
The method of claim 3,
And environmental temperature acquisition means for acquiring an ambient temperature,
Wherein the reference time is changed corresponding to the environmental temperature.

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