JP7152717B2 - Hot water supply equipment and air conditioning hot water supply equipment - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applied July 18, 2018 Published on the website of OM Solar Co., Ltd. (https://omsolar.jp/omx/omx/), September 22, 2018 Nikkei Home Published on pages 58-63 of the October 2018 issue of Builder, July 11, 2018 Asahi Shimbun Published on page 32 of the July 11, 2018 morning edition, June 14, 2018 Nihon Keizai Shimbun 2018 Published on page 37 of the morning edition dated June 14, 2018, May 21, 2018 Chofu Seisakusho Co., Ltd. shipped air conditioning and hot water supply equipment (air conditioning and hot water storage equipment) from the head office factory, August 8, 2018 Shin-Marunouchi Building Conference Announced at Chofu Seisakusho Co., Ltd. second quarter financial results briefing held at Square 901, August 23, 2018 Chofu Seisakusho Co., Ltd. website (https://www.irmovie.jp) /nir/?conts=chofu_ir, https://www.irmovie.jp/nir/chofu_ir/pdf/chofu_201808.pdf)

TECHNICAL FIELD The present invention relates to a hot water supply apparatus having a hot water supply function of supplying hot water in a hot water storage tank to the outside, and an air conditioning hot water supply facility capable of adjusting indoor temperature in addition to the hot water supply function.

A water heater that supplies hot water stored in a hot water storage tank to a bathtub, etc. operates a heat pump during the nighttime period when the electricity usage rate is low, and the amount of water that is predicted to be used by the next nighttime period starts. Hot water is boiled in a hot water storage tank (see Patent Documents 1 and 2). This is based on the idea of avoiding boiling water that consumes electricity during the daytime and reducing electricity charges paid by consumers.

JP 2011-237149 A JP 2013-250012 A

However, the amount of heat lost from the hot water in the hot water storage tank due to heat dissipation increases as the time until the boiled hot water is used increases. In this regard, since ordinary households tend to use a lot of hot water from the evening to the night, most of the hot water boiled during the night continues to radiate heat in the hot water storage tank until the evening.
In recent years, a part of the refrigerant circulation circuit provided for indoor temperature control has been used as a circuit for boiling water in the hot water storage tank to heat the hot water for hot water supply and control the indoor temperature. Air-conditioning and hot-water supply equipment that adjusts and
SUMMARY OF THE INVENTION It is an object of the present invention to provide a hot water supply apparatus and an air-conditioning/hot water supply system that suppress the amount of heat lost from hot water in a hot water storage tank due to heat radiation.

A hot water supply apparatus according to a first aspect of the invention that meets the above object is a water supply apparatus having a hot water storage tank and a heating mechanism that performs a water heating operation for boiling water in the hot water storage tank, wherein the heating mechanism includes a time zone in the evening of the current day. In one time zone, the condition for starting the water heating operation is set as the condition for starting the water heating operation in a second time zone before the first time zone, which includes the time zone from midnight to morning on the day. First, in the first time zone, the cumulative amount of heat applied to the hot water storage tank on the day is less than the scheduled amount of heat to be applied to the hot water storage tank on the day during the water heating operation. As a start condition, in the second time zone, the condition that the cumulative amount of heat is less than the amount of heat to be applied is not set as a condition for starting the water boiling operation .

The air conditioning hot water supply equipment according to the second invention in line with the above object includes a first heat exchanger provided indoors, a pressure reducing valve, a second heat exchanger that exchanges heat between the outside air and the refrigerant, and a compressor in that order. a circulation circuit for circulating the refrigerant to heat the room; a bypass passage provided with an on-off valve that switches between an open state that allows the inflow of the refrigerant from the circulation circuit and a closed state that disables it; and a hot water storage tank in which hot water is boiled by receiving the heat of the refrigerant flowing into the bypass from the circulation circuit through a water heating circuit, the first heat exchanger being accommodated. an indoor unit comprising a housing, taking in air warmed by heat generation of the heat collector from a heat collection vicinity space provided near the heat collector into the housing, and sending the air into the room from the housing; a control means for controlling the switching of the opening/closing state of the valve and the operation of the compressor to perform the boiling operation of the hot water storage tank, wherein the control means is controlled in a first time zone including the evening time zone of the day. and the condition for starting the water heating operation is not set as the condition for starting the water heating operation in the second time band before the first time band, including the time band from midnight to morning on the day, In the time zone 1, the condition for starting the water boiling operation is that the cumulative amount of heat given to the hot water storage tank on the day is less than the scheduled heat quantity to be given to the hot water storage tank on the day in the water boiling operation, In the second time zone, the condition that the cumulative amount of heat is less than the amount of heat to be applied is not set as a condition for starting the water boiling operation .

In the hot water supply apparatus according to the first invention and the air conditioning hot water supply equipment according to the second invention, the condition for starting the water heating operation is set from midnight to morning on the day in the first time zone including the evening time zone on the day. In the second time zone before the first time zone, which includes the time zone, the condition for starting the water heating operation is not set. The amount of heat in the hot water storage tank can be left in the time zone 1, and the amount of heat in the hot water storage tank that was scheduled to be given to the hot water storage tank on the day by boiling is completed by the morning (that is, the time when the nighttime period ends). It is possible to suppress the amount of heat lost by heat radiation from hot water.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of a hot water supply apparatus according to an embodiment of the present invention and an air conditioning hot water supply facility including the hot water supply apparatus; Fig. 3 is a circuit diagram of a heating mechanism of the hot water supply apparatus; 4 is a block diagram showing connections of control means; FIG. FIG. 4 is an explanatory diagram showing how the room is heated. FIG. 4 is an explanatory diagram showing how the room is cooled; FIG. 4 is an explanatory diagram showing a state during a boiling operation; FIG. 10 is an explanatory diagram showing a state when a heating operation is performed together with cooling of the room. FIG. 10 is an explanatory diagram showing a state when a heating operation is performed together with cooling of the room.

Next, specific embodiments of the present invention will be described with reference to the attached drawings for better understanding of the present invention.
As shown in FIGS. 1 and 2, a hot water supply apparatus 10 according to an embodiment of the present invention has a hot water storage tank 11 and a heating mechanism 12 for boiling hot water in the hot water storage tank 11 . A detailed description will be given below.

As shown in FIGS. 1 and 2, the water heater 10 includes a vertically long hot water storage tank 11, a heat exchanger 14 (third heat exchanger) connected to the hot water storage tank 11 via a water heating circuit 13, A heat pump unit 18 having a pressure reducing valve 15, a heat exchanger 16 (second heat exchanger) and a compressor 17, a heat exchanger 19 (first heat exchanger) provided in the building S (indoor) and and an indoor unit 21 comprising a housing 20 housing the heat exchanger 19 .

The hot water storage tank 11 is supplied with water from a water supply pipe 22 connected to its lower portion, and sends out hot water to be supplied to a bathtub K, a kitchen, etc. from a hot water discharge pipe 23 connected to its upper portion. As shown in FIG. 2, both ends of a water heating circuit 13 provided with a heat exchanger 14, a pump 24 and a temperature sensor 25 are connected to the upper and lower portions of the hot water storage tank 11, respectively. The water in the lower part of the hot water storage tank 11 flows into the boiling circuit 13 by the operation of the pump 24, passes through the heat exchanger 14, and is sent to the upper part of the hot water storage tank 11. - 特許庁
Temperature sensors 26, 27, 28, 29, and 30 for measuring the hot water in the hot water storage tank 11 are provided in the hot water storage tank 11 at intervals from a higher position to a lower position.

The heat exchanger 19, the pressure reducing valve 15, the heat exchanger 16 and the compressor 17 are connected by a circulation circuit 31 through which refrigerant circulates. The refrigerant circulates in the circulation circuit 31 by the operation of the compressor 17. By circulating the refrigerant in the circulation circuit 31, the heat exchanger 19 exchanges heat between the air in the housing 20 and the refrigerant, and the pressure reducing valve 15 reduces the pressure of the refrigerant. The heat exchanger 16 exchanges heat between the refrigerant and the outside air, and the compressor 17 compresses the refrigerant to a high pressure state.
In addition to the heat exchanger 19, the pressure reducing valve 15, the heat exchanger 16, and the compressor 17, the circulation circuit 31 is provided with a solenoid valve 32, a four-way valve 33 for switching the flow direction of the refrigerant, and a solenoid valve .
In addition, in FIG. 2, the circulation circuit 31 is indicated by a thick line.

As shown in FIG. 3, the four-way valve 33 is connected to a control means 35 that can be designed by a microcomputer or the like. It is possible to switch between a first state in which the destination of the refrigerant flowing into the four-way valve 33 is the solenoid valve 32 or a second state in which the solenoid valve 34 is sent.
In addition to the four-way valve 33, air is supplied to the pressure reducing valve 15, the compressor 17, the pump 24, the temperature sensors 25 to 30, the solenoid valves 32 and 34, and the heat exchanger 16 to promote heat exchange in the heat exchanger 16. A fan 36 is connected to the control means 35 . The pressure reducing valve 15 is switched between a fully open state in which the refrigerant is not substantially decompressed and a throttled state in which the refrigerant is decompressed by a signal transmitted from the control means 35. to start or stop the operation.

As shown in FIG. 2, the control means 35 turns the electromagnetic valve 34 OFF so that the refrigerant passes from the side of the heat exchanger 19 to the side of the four-way valve 33 but does not pass from the side of the four-way valve 33 to the side of the heat exchanger 19. or the ON state in which the refrigerant can pass from the heat exchanger 19 side to the four-way valve 33 side and from the four-way valve 33 side to the heat exchanger 19 side. The refrigerant is passed from the side of the four-way valve 33 to the side of the four-way valve 33 but is not allowed to pass from the side of the four-way valve 33 to the heat exchanger 16, or the refrigerant flows from the heat exchanger 16 side to the four-way valve 33 side and from the four-way valve 33 side to the heat exchanger. It is possible to switch to an ON state in which the light can pass through to the 16 side.

One end of the heat exchanger 14 is connected to the refrigerant outlet side of the compressor 17 of the circulation circuit 31 (in the present embodiment, the region between the compressor 17 and the four-way valve 33), and the other end is connected to the heat exchanger. A bypass line 38 connected to the circulation circuit 31 is connected between the exchanger 16 and the pressure reducing valve 15 . The bypass passage 38 includes, in order from one end to the other end, a solenoid valve 39 (an example of an on-off valve), a muffler 40 capable of storing refrigerant, a pressure reducing valve 41, and from the other end of the bypass passage 38 to the pressure reducing valve 41. A check valve 42 is provided to prevent the flow of coolant toward it. The bypass line 38 is connected to the heat exchanger 14 in the area between the solenoid valve 39 and the muffler 40 .

The solenoid valve 39 is connected to the control means 35 as shown in FIG. The enabling OFF state (closed state) is switched.
A pressure reducing valve 41 connected to the control means 35 receives a signal from the control means 35, and is switched between a fully open state in which the refrigerant is not substantially decompressed, a throttled state in which the refrigerant is decompressed, and a closed state in which the refrigerant is not allowed to pass.

A branch line 43 is connected to the circulation circuit 31 and the bypass line 38, as shown in FIG. One end of the branch passage 43 is connected to a region of the bypass passage 38 between the heat exchanger 14 and the pressure reducing valve 41 (in the present embodiment, between the muffler 40 and the pressure reducing valve 41), and the other end is connected to the circulation circuit 31. It is connected to the area between the solenoid valve 32 and the heat exchanger 16 . As shown in FIGS. 2 and 3, the branch passage 43 includes an electromagnetic valve 44 connected to the control means 35 and a check valve 45 for preventing the refrigerant from flowing into the branch passage 43 from the other end of the branch passage 43 . is provided. When a command signal is sent from the control means 35, the electromagnetic valve 44 is in an ON state in which the refrigerant flows from one end of the branch passage 43 to the other end, and in an OFF state in which the refrigerant does not flow from one end to the other end of the branch passage 43. and can be switched.

2, one end of the circulation circuit 31 and the bypass 38 is connected to the area between the heat exchanger 19 and the solenoid valve 34 of the circulation circuit 31, and the other end is connected to the bypass 38 for heat exchange. A channel 46 is connected to a region between the vessel 14 and the pressure reducing valve 41 (in this embodiment, between the muffler 40 and the pressure reducing valve 41). As shown in FIGS. 2 and 3, the flow path 46 includes an electromagnetic valve 47 connected to the control means 35 and a check valve for preventing the refrigerant from flowing into the flow path 46 from one end side of the flow path 46. 48 are provided. The solenoid valve 47 receives a command signal from the control means 35 and is in an OFF state in which the refrigerant does not flow from the other end of the flow path 46 toward the check valve 48 and in a reverse state from the other end of the flow path 46 . The ON state is switched so that the refrigerant flows toward the stop valve 48 .

Moreover, as shown in FIG. 1, a PVT panel (an example of a heat collector) P is fixed to the roof of the building S in which the indoor unit 21 is provided. The PVT panel P is a plate-shaped object that performs photovoltaic power generation and solar heat collection, and its temperature rises mainly when solar heat is collected. In the building S, near the PVT panel P (in this embodiment, under the roof to which the PVT panel P is fixed), a space near the panel (an example of a heat collecting near space) Q communicating with the outdoors is provided. there is

The housing 20 of the indoor unit 21 includes the other ends of ducts 50, 51, 52, and 53 each having one end disposed in the room R, the other end of a duct 54 having one end connected to the space Q near the panel, and one end of The other end of the duct 55 connected to the duct 54 is connected to the other ends of the ducts 56 and 57 each having one end connected to the outside.
The indoor unit 21 has a plurality of fans and dampers in the housing 20, and by operating these fans and dampers with the control means 35, the outside air taken in from the duct 57 and the air in the room R taken in from the duct 52 are , the temperature is adjusted by passing through the heat exchanger 19, and supplied to the room R through the ducts 50 and 51. , the space Q near the panel to be discharged to the outside. Thereby, temperature adjustment (cooling or heating) and ventilation of the room R are performed.

In the present embodiment, the heating mechanism 12 that performs the boiling operation for boiling the hot water in the hot water storage tank 11 mainly includes the boiling circuit 13, the circulation circuit 31, the bypass passage 38, the branch passage 43, the heat exchangers 14, 16, 19, It is composed of pressure reducing valves 15 and 41, compressor 17, pump 24, solenoid valves 32, 34, 39 and 44, four-way valve 33, temperature sensors 25-30, control means 35 and fan . Air conditioning and hot water supply equipment 60 that stores hot water for hot water supply in the room R (indoor) and hot water storage tank 11 is mainly composed of the hot water storage tank 11, the heating mechanism 12, the housing 20, and the ducts 50-57.

When heating the room R (indoor) without boiling the hot water in the hot water storage tank 11, the control means 35 turns the solenoid valve 34 ON, the solenoid valve 32 OFF, the solenoid valve 39 OFF, and the solenoid valve 44 ON, the electromagnetic valve 47 is OFF, the pressure reducing valves 15 and 41 are throttled and fully opened, the four-way valve 33 is set to the second state, the compressor 17 is operated, and the refrigerant is released as shown in FIG. As shown, it passes through the heat exchanger 19, the pressure reducing valve 15, the heat exchanger 16, the electromagnetic valve 32, the four-way valve 33, the compressor 17, the four-way valve 33, and the electromagnetic valve 34 in order and returns to the heat exchanger 19 (refrigerant circulates in the circulation circuit 31 in such a manner), and the refrigerant is prevented from flowing through the bypass passage 38 and the branch passage 43 . As a result, the refrigerant circulating in the circulation circuit 31 condenses when passing through the heat exchanger 19 to heat the air in the housing 20, and evaporates when passing through the heat exchanger 16 to absorb heat from the outside air. make sure to

When cooling the room R without boiling the hot water in the hot water storage tank 11, the control means 35 turns the solenoid valve 34 OFF, the solenoid valve 32 ON, the solenoid valve 39 OFF, and the solenoid valve 44 OFF. , the electromagnetic valve 47 is turned on, the pressure reducing valves 15 and 41 are set to the throttled state and the fully open state, respectively, the four-way valve 33 is set to the first state, the compressor 17 is operated, and the refrigerant is released as shown in FIG. , the heat exchanger 19, the electromagnetic valve 34, the four-way valve 33, the compressor 17, the four-way valve 33, the electromagnetic valve 32, the heat exchanger 16, and the pressure reducing valve 15 in order to return to the heat exchanger 19, and the bypass path 38 and the branch passage 43 are prevented from flowing with the refrigerant. As a result, the refrigerant circulating in the circulation circuit 31 evaporates when passing through the heat exchanger 19 to cool the air inside the housing 20, and condenses when passing through the heat exchanger 16 to radiate heat to the outside air. to The reason why the solenoid valve 47 is turned on is to allow the refrigerant to flow from the bypass 38 into the flow path 46 and suppress the occurrence of a high pressure region in the bypass 38 .

When boiling the hot water in the hot water storage tank 11 without cooling the room R, the control means 35 turns the solenoid valve 34 OFF, the solenoid valve 32 OFF, the solenoid valve 39 ON (open), and the solenoid valve 44 is turned off, the solenoid valve 47 is turned off, the pressure reducing valves 15 and 41 are fully opened and throttled respectively, the four-way valve 33 is set to the second state, and the compressor 17 and the pump 24 are operated.

As a result, as shown in FIG. 6, the refrigerant flows through a heat exchanger 16 functioning as an evaporator, a solenoid valve 32, a four-way valve 33, a compressor 17, a heat exchanger 14, a muffler 40, a pressure reducing valve 41, and a check valve. 42 in order to return to the heat exchanger 16, water flows from the lower part of the hot water storage tank 11 into the water heating circuit 13, absorbs heat from the refrigerant flowing through the bypass 38 when passing through the heat exchanger 14, and stores hot water. The hot water flows into the upper part of the tank 11 and the hot water in the hot water storage tank 11 is boiled. Therefore, the control means 35 switches the state of the electromagnetic valve 39 and controls the operation of the compressor 17, etc., so that the compressor 17, the heat exchangers 14, 16, the pressure reducing valve 41, the pump 24, etc., boil water in the hot water storage tank 11. You will be forced to drive.

Since the refrigerant does not pass through the heat exchanger 19 at this time, the heat exchanger 19 neither heats nor cools the air inside the housing 20 . In this regard, the air conditioning and hot water supply equipment 60 heats the room R by using the air in the space Q near the panel P that is heated by the heat generated by the PVT panel P under predetermined conditions, in a state in which the refrigerant does not pass through the heat exchanger 19. can do. When the control means 35 detects that the air in the space Q near the panel is at a temperature at which the room R can be heated based on the outside air temperature and the like obtained from a temperature sensor (not shown), the indoor unit 21 operates the fan and the like in the housing 20. is operated to take the warm air in the space Q near the panel into the housing 20 via the duct 54, send it out to the room R from the housing 20, and supply it to the room R via the ducts 50 and 51. , the room R is heated. The heating of the room R using the air in the space Q near the panel can be performed simultaneously with the boiling of the hot water in the hot water storage tank 11 .

Further, in the present embodiment, it is possible to heat the hot water in the hot water storage tank 11 as well as cool the room R. A mode in which only the heat exchanger 19 functions as an evaporator function as an evaporator.
In the mode in which only the heat exchanger 19 functions as an evaporator, the control means 35 turns the solenoid valve 34 OFF, the solenoid valve 32 OFF, the solenoid valve 39 ON (open), and the solenoid valve 44 OFF. , the electromagnetic valve 47 is turned off, the pressure reducing valves 15 and 41 are fully opened and throttled, respectively, the four-way valve 33 is set to the first state, and the compressor 17 and the pump 24 are operated.

7, the control means 35 causes the refrigerant exiting the heat exchanger 19, which functions as an evaporator (that is, cools the air inside the housing 20), to flow through the electromagnetic valve 34 and the four-way valve 33. , the compressor 17, the electromagnetic valve 39, the heat exchanger 14, the muffler 40, the pressure reducing valve 41, the check valve 42, and the pressure reducing valve 15 in order to return to the heat exchanger 19. flows into the hot water heating circuit 13, passes through the heat exchanger 14, and flows into the upper part of the hot water storage tank 11. - 特許庁As a result, the heat of the refrigerant flowing through the bypass 38 is given to the water in the hot water storage tank 11 flowing through the hot water heating circuit 13 when passing through the heat exchanger 14, thereby heating the water (i.e. , the heat of the refrigerant flowing from the circulation circuit 31 into the bypass 38 is given to the water through the water boiling circuit 13, and the hot water in the hot water storage tank 11 is boiled). At this time, since the electromagnetic valve 44 is in the OFF state, the refrigerant does not flow through the branch passage 43 .

In the mode in which the heat exchangers 19 and 16 function as evaporators, the control means 35 turns the solenoid valve 34 OFF, the solenoid valve 32 OFF, the solenoid valve 39 ON (open), and the solenoid valve 44 is turned ON, the electromagnetic valve 47 is turned OFF, the pressure reducing valves 15 and 41 are throttled and closed, and the four-way valve 33 is set to the first state to operate the compressor 17 and the pump 24 . As a result, as shown in FIG. 8, the control means 35 causes the refrigerant exiting the heat exchanger 19 functioning as an evaporator to flow through the solenoid valve 34, the four-way valve 33, the compressor 17, the solenoid valve 39, and the heat exchanger 14. , a muffler 40, an electromagnetic valve 44, a check valve 45, a heat exchanger 16 functioning as an evaporator, and a pressure reducing valve 15 in order, and return to the heat exchanger 19. The temperature of the water flowing into the circuit 13 rises while passing through the heat exchanger 14 so that the water flows into the upper part of the hot water storage tank 11 .

In the present embodiment, the control means 35 controls the first time band including the evening time zone of the day (12:00 to 24:00 of the day in the present embodiment) and the time zone from midnight to morning of the day. When the start condition and end condition of the water heating operation are different from the second time zone before the first time zone (0:00 to 12:00 on the day in this embodiment) including the time zone is the same as This point will be described below.
The control means 35 controls that the temperature measured by the temperature sensor 30 arranged at the lowest position among the temperature sensors 26 to 30 attached to the hot water storage tank 11 is T1° C. (for example, 30° C.) in the first and second time zones. °C) or higher, do not boil the water.

Then, in both the first and second time zones, when the temperature measured by the temperature sensor 30 is less than T1° C., the control means 35 determines that the heat quantity of hot water (meaning hot water and cold water) in the hot water storage tank 11 is , a predetermined minimum amount of heat to be secured in the hot water storage tank 11 (hereinafter also simply referred to as "minimum amount of heat") and the amount of heat Q _Start in Equation 1 below, the water heating operation is started. .

Q _Start means that the amount of heat of hot water supplied from the hot water storage tank 11 to the outside during a time period from midnight to morning (0:00 to 9:00 in the present embodiment) has increased during a predetermined period in the past (in the present embodiment). Then, it is the value obtained by adding the amount of heat lost from the hot water storage tank 11 due to heat dissipation on the current day to the maximum value in the past seven days.
In this embodiment, the minimum heat quantity is 20 MJ, and the heat quantity of the hot water in the hot water storage tank 11 is calculated from the temperatures measured by the temperature sensors 26-30.

Then, in the first time zone, when the temperature measured by the temperature sensor 30 is less than T1° C. and the heat amount of hot water in the hot water storage tank 11 is equal to or more than the minimum heat amount and equal to or more than the heat amount of Q _Start , When the cumulative amount of heat for the day is less than the scheduled amount of heat to be given on the day, the water heating operation is started (the condition for starting the water heating operation is that the cumulative amount of heat is less than the scheduled amount of heat to be given), and the cumulative amount of heat for the day is the scheduled amount of heat to be given on the day. When the amount of heat is greater than or equal to the amount of heat, the water heating operation is not started.

On the other hand, when the temperature measured by the temperature sensor 30 is less than T1° C. in the second time zone and the heat quantity of hot water in the hot water storage tank 11 is equal to or more than the minimum heat quantity and equal to or more than the heat quantity of Q _Start , The water heating operation is not started regardless of the size relationship between the accumulated heat quantity given to the inside of the hot water storage tank 11 by the water boiling operation on the day and the heat quantity scheduled to be given to the hot water storage tank 11 on the day by the water boiling operation. Therefore, the control means 35 (heating mechanism 12) does not set the condition for starting the boiling operation in the first time zone as the condition for starting the boiling operation in the second time zone.

In the present embodiment, the cumulative amount of heat _Qb is determined by Equation 2 shown below, and the planned heat amount _Qn is determined by Equation 3 below.

Further, the control means 35 terminates the boiling operation under the following conditions.
First, when the control means 35 detects that the temperature measured by the temperature sensor 25 has reached T2° C. (for example, 45° C.) or higher during the boiling operation in both the first and second time zones, it stops the boiling operation. The temperature measured by the temperature sensor 25 during the boiling operation is less than T2° C., the heat quantity of the hot water in the hot water storage tank 11 is equal to or higher than Q _Stop shown in the following equation 4, and the accumulated heat quantity for the day is equal to or higher than the scheduled heat quantity to be applied. If so, stop the water boiling operation.

Then, the control means 35 determines that the temperature measured by the temperature sensor 25 during the boiling operation is less than T2° C., the heat quantity of hot water in the hot water storage tank 11 is equal to or higher than Q _Stop shown in the following equation 4, and the cumulative heat quantity of the day is , the amount of heat to be applied is less than the amount of heat to be applied, the water heating operation is terminated in the second time zone, but the water heating operation is continued in the first time zone. Therefore, the control means 35 (heating mechanism 12) does not set the condition for ending the boiling operation in the second time zone as the condition for ending the boiling operation in the first time zone.

In the present embodiment, heating of the room R by passing the refrigerant through the heat exchangers 16 and 19 and boiling water cannot be performed at the same time. Therefore, the control means 35 appropriately gives priority to either the water heating operation or the heating of the room R by passing the refrigerant through the heat exchangers 16 and 19 (hereinafter simply referred to as "heating of the room R"). to For example, in a specific time period, in principle, the water heating operation is given priority over the heating of the room R, but in the same time period, when the temperature of the room R falls below a specific temperature, Give priority to the boiling operation.

On the other hand, the heating of the room R using the warm air in the space Q near the panel can be performed at the same time as the water heating operation. The water heating operation is started at the timing, and the water heating operation is not stopped when the heating is started during the water heating operation.
As shown in FIGS. 1 and 3, the control means 35 is connected to an operation panel 61 for air conditioning operation and an operation panel 62 for hot water supply operation.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all modifications of conditions that do not deviate from the gist of the present invention are within the scope of the present invention.
For example, the first and second time bands need not be 12:00-24:00 and 0:00-12:00, respectively. For example, the first and second time zones may be 11:00-24:00 and 0:00-11:00 respectively, or 13:00-24:00 and 0:00-13:00 respectively. or 14:00 to 24:00 and 0:00 to 14:00. In addition to the first and second time zones, a time zone may be provided in which conditions for starting the water boiling operation and conditions for ending the water boiling operation are different from those of the first and second time zones.

In addition, the condition for starting the water heating operation in the first time zone and not the condition for starting the water heating operation in the second time zone is not limited to the fact that the accumulated heat amount on the day is less than the scheduled heat amount to be applied on the day. For example, the condition may be that the cumulative amount of heat on the current day is less than the average value of the amount of heat given to the hot water storage tank in one day during a predetermined period in the past.
The condition for ending the water boiling operation in the second time zone and not the condition for ending the water boiling operation in the first time zone is not limited to the fact that the cumulative amount of heat on the day is less than the amount of heat to be applied on the day. For example, the condition may be that the accumulated amount of heat on the current day is less than the maximum value of the amount of heat given to the hot water storage tank in one day during a predetermined period in the past.

10: hot water supply device, 11: hot water storage tank, 12: heating mechanism, 13: water heating circuit, 14: heat exchanger, 15: pressure reducing valve, 16: heat exchanger, 17: compressor, 18: heat pump unit, 19: heat Exchanger, 20: Housing, 21: Indoor unit, 22: Water supply pipe, 23: Hot water discharge pipe, 24: Pump, 25 to 30: Temperature sensor, 31: Circulation circuit, 32: Solenoid valve, 33: Four-way valve, 34: Solenoid valve 35: Control means 36: Fan 38: Bypass passage 39: Solenoid valve 40: Muffler 41: Pressure reducing valve 42: Check valve 43: Branch passage 44: Solenoid valve 45: Reverse Stop valve, 46: Flow path, 47: Solenoid valve, 48: Check valve, 50 to 57: Duct, 60: Air conditioning hot water supply equipment, 61, 62: Operation panel, K: Bathtub, P: PVT panel, Q: Panel Nearby space, R: room, S: building

Claims (4)

A hot water supply apparatus having a hot water storage tank and a heating mechanism for boiling hot water in the hot water storage tank,
The heating mechanism sets the condition for starting the water boiling operation in a first time zone including the evening time zone of the current day to the first time zone before the first time zone including the time zone from midnight to morning of the current day. In the time zone 2, the condition for starting the water heating operation is not set, and in the first time zone, the cumulative amount of heat given to the hot water storage tank on the day is scheduled to be given to the hot water storage tank on the day by the water heating operation. The condition for starting the boiling operation is that the amount of heat to be applied is less than the planned amount of heat to be applied, and the condition that the cumulative amount of heat is less than the amount of heat to be applied is not set as the condition for starting the boiling operation in the second time zone. A water heater characterized by: 2. The hot water supply apparatus according to claim 1 , wherein the heating mechanism does not use the condition for ending the water boiling operation in the second time zone as the condition for ending the water boiling operation in the first time zone. water heater. A first heat exchanger provided indoors, a pressure reducing valve, a second heat exchanger that exchanges heat between the refrigerant and the outside air, and a circulation circuit that heats the room by circulating the refrigerant in order of the compressor; A bypass provided with an on-off valve that switches between an open state that allows the inflow of the refrigerant from the circulation circuit and a closed state that disables it, and the heat of the refrigerant flowing into the bypass from the circulation circuit is used to boil water. An air conditioning hot water supply facility having a hot water storage tank in which hot water is boiled by being supplied through a circuit,
A housing containing the first heat exchanger is provided, and air warmed by heat generation of the heat collector is taken into the housing from a heat collection vicinity space provided in the vicinity of the heat collector. an indoor unit sent out from the housing;
a control means for controlling the switching of the opening/closing state of the opening/closing valve and the operation of the compressor to perform the boiling operation of the hot water storage tank;
The control means sets the conditions for starting the water heating operation in a first time band including the evening time band of the current day to the first time band before the first time band including the time band from midnight to morning of the current day. In the time zone 2, the condition for starting the water heating operation is not set, and in the first time zone, the cumulative amount of heat given to the hot water storage tank on the day is scheduled to be given to the hot water storage tank on the day by the water heating operation. The condition for starting the boiling operation is that the amount of heat to be applied is less than the planned amount of heat to be applied, and the condition that the cumulative amount of heat is less than the amount of heat to be applied is not set as the condition for starting the boiling operation in the second time zone. Characteristic air conditioning hot water supply equipment. 4. The air conditioning and hot water supply system according to claim 3 , wherein the control means does not set the water boiling operation end condition in the second time zone as the water boiling operation end condition in the first time zone. Air conditioning hot water supply equipment.

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