JP2004218906A - Water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water heater having a hot water storage function for storing the hot water in a hot water supply tank, a boiling function for heating the bathtub water, and a function for feeding the hot water in the hot water supply tank, to a bathtub, only by connecting a hot water supply pipe between a heat pump unit and a hot water supply unit, and connecting a bathtub pipe between the heat pump unit and the bathtub. <P>SOLUTION: This water heater comprises the hot water supply pipe 41 for guiding the water stored in the hot water supply tank 11 or the tap water to a first heat exchanger 62A and guiding the heated hot water to the hot water supply tank 11, and the bathtub pipe 72 for guiding the bathtub water in the bathtub 70 to a second heat exchanger 65B and guiding the heated hot water to the bathtub 70. In this water heater, the heat pump unit 60 and the hot water supply unit 10 are connected by the hot water supply pipe 41, the heat pump unit 60 and the bathtub 70 are connected by the bathtub pipe 72, and the hot water in the hot water supply tank 11 is guided to the heat pump unit 60 by using the hot water supply pipe 41, and then guided to the bathtub 70 by using the bathtub pipe 72 as the hot water feeding function. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a heat pump unit having a refrigerating cycle in which a compressor, a heat exchanger for hot water supply, an expansion valve, and an evaporator are connected by pipes, and a hot water supply unit having a hot water tank. A hot water storage function that stores hot water in a hot water tank using a hot water supply, a boiling function that heats bath water in a bath tub using a hot water supply heat exchanger, and a pouring function that pours hot water in a hot water tank into a bath tub The present invention relates to a water heater provided with:
[0002]
[Prior art]
BACKGROUND ART Conventionally, heat pump water heaters using a refrigeration cycle have been proposed, for example, those that store hot water in a hot water tank using a refrigeration cycle and those that supply hot water to a bathtub have been proposed (for example, Patent Documents 1 and 2).
Patent Literature 3 further includes a hot water storage function of storing hot water in a hot water supply tank, a boiling function of heating bath water in the bath tub, and a pouring function of pouring hot water in the hot water supply tank into the bath tub. Water heaters have been proposed.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-130819 [Patent Document 2]
Japanese Patent Application Laid-Open No. 2002-243274 [Patent Document 3]
Japanese Patent Application Laid-Open No. 10-122684 (FIG. 2 and a column for description of an embodiment relating to FIG. 2)
[0004]
[Problems to be solved by the invention]
However, when a heat pump unit having a refrigeration cycle and a hot water supply unit having a hot water supply tank are separately provided as separate units, construction becomes difficult if there are many pipes connecting the respective units.
In particular, the hot water supply device has a hot water storage function of storing hot water in a hot water supply tank using a hot water supply heat exchanger that forms a refrigeration cycle, and a bath water in a bath tub using a hot water supply heat exchanger that forms a refrigeration cycle. In the case of having a boiling function for heating and a pouring function for pouring hot water in a hot water supply tank into a bathtub, it is important to reduce the number of connection pipes to the bathtub.
[0005]
Accordingly, the present invention provides a hot water storage function of storing hot water in a hot water supply tank simply by connecting a hot water supply pipe between the heat pump unit and the hot water supply unit and connecting a bathtub pipe between the heat pump unit and the bathtub. It is another object of the present invention to provide a water heater that has a boiling function of heating bath water in a bath tub and a function of pouring hot water in a hot water tank into the bath tub.
Further, the present invention only connects a hot water supply pipe and a hot water supply pipe between the heat pump unit and the hot water supply unit, and connects a bathtub pipe between the heat pump unit and the hot tub. It is an object of the present invention to provide a water heater that can have a hot water storage function of storing hot water, a boiling function of heating bath water in a bathtub, and a pouring function of pouring hot water in a hot water tank into the bathtub. .
[0006]
[Means for Solving the Problems]
The water heater according to the first aspect of the present invention includes a heat pump unit having a refrigeration cycle in which a compressor, a heat exchanger for hot water supply, an expansion valve, and an evaporator are connected by piping, and a hot water supply unit having a hot water tank. A hot water storage function for storing hot water in the hot water supply tank using the hot water supply heat exchanger, a boiling function for heating bath water in the bath tub using the hot water supply heat exchanger, and hot water in the hot water supply tank A hot water supply device having a pouring function of pouring water into the bath tub, wherein water supplied from stored water or tap water in the hot water supply tank is guided to the hot water supply heat exchanger, and the hot water supply heat exchanger includes: A hot water supply pipe that guides heated hot water to the hot water supply tank, and a bathtub pipe that guides bath water in the bath tub to the hot water supply heat exchanger and guides hot water heated by the hot water supply heat exchanger to the bath tub. And the heat pump unit and The hot water supply unit is connected by the hot water supply pipe, the heat pump unit and the bathtub are connected by the bathtub pipe, and the pouring function is to supply hot water in the hot water supply tank to the hot water supply pipe. After being guided to the heat pump unit by using the pipe for the bathtub, it is guided to the bathtub using the bathtub piping.
According to a second aspect of the present invention, in the water heater according to the first aspect, in the heat pump unit, a cold water-side pouring pipe branched from a hot water pipe located on an inflow side of the hot water heat exchanger. And a hot water pouring pipe branched from a hot water pipe located on the outflow side of the hot water heat exchanger, and a cold water pouring pipe and the hot water pouring pipe connected to an inlet port. And a pouring pipe connecting the outflow-side connection port of the mixing valve and the bathtub pipe.
The water heater according to the third aspect of the present invention includes a heat pump unit having a refrigeration cycle in which a compressor, a heat exchanger for hot water supply, an expansion valve, and an evaporator are connected by piping, and a hot water supply unit having a hot water tank. A hot water storage function for storing hot water in the hot water supply tank using the hot water supply heat exchanger, a boiling function for heating bath water in the bath tub using the hot water supply heat exchanger, and hot water in the hot water supply tank A hot water supply device having a pouring function of pouring water into the bath tub, wherein water supplied from stored water or tap water in the hot water supply tank is guided to the hot water supply heat exchanger, and the hot water supply heat exchanger includes: A hot water supply pipe that guides heated hot water to the hot water supply tank, and a bathtub pipe that guides bath water in the bath tub to the hot water supply heat exchanger and guides hot water heated by the hot water supply heat exchanger to the bath tub. And the heat pump unit and The hot water supply unit is connected by the hot water supply pipe, the heat pump unit and the bathtub are connected by the bathtub pipe, and the pouring function is to supply hot water in the hot water supply tank to the hot water supply pipe. After being guided to the heat pump unit by using the pipe for the bathtub, it is guided to the bathtub using the bathtub piping.
According to a fourth aspect of the present invention, in the hot water supply apparatus according to the third aspect, in the hot water supply unit, a cold water-side pouring pipe that guides water supply from stored water or tap water in the hot water supply tank; A hot-water pouring pipe for guiding hot water in the tank, a mixing valve connecting the cold-water pouring pipe and the hot-water pouring pipe to an inflow-side connection port, and an outflow-side connection port of the mixing valve And a pouring pipe connected to the heat pump unit, wherein the pouring pipe is connected to the bathtub pipe in the heat pump unit.
According to a fifth aspect of the present invention, in the water heater according to any one of the first to fourth aspects, the hot water supply heat exchanger is replaced with a first hot water supply heat exchanger and a second hot water supply heat exchanger. The first hot water supply heat exchanger and the second hot water supply heat exchanger can be selectively used, and the hot water supply pipe is connected to the first hot water supply heat exchanger. The pipe for the bathtub may be a secondary pipe of the second heat exchanger for hot water supply.
According to a sixth aspect of the present invention, in the water heater of the fifth aspect, an expansion valve is provided between the first heat exchanger for hot water supply and the second heat exchanger for hot water supply, and the expansion valve is provided. Is characterized in that the second hot water supply heat exchanger functions as an evaporator.
According to a seventh aspect of the present invention, in the water heater according to any one of the first to fourth aspects, the refrigerant used for the refrigeration cycle is carbon dioxide, and the refrigerant is operated in a state of exceeding a critical pressure on a high pressure side. Features.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
In the water heater according to the first embodiment of the present invention, a heat pump unit and a hot water supply unit are connected by a hot water supply pipe, a heat pump unit and a bathtub are connected by a bathtub pipe, and a pouring function is provided in the hot water supply tank. The hot water is guided to the heat pump unit using the hot water supply pipe, and then to the bathtub using the bathtub pipe. According to the present embodiment, after the hot water in the hot water supply tank is guided to the heat pump unit using the hot water supply pipe, and then guided to the bathtub using the bathtub pipe, hot water is supplied between the heat pump unit and the hot water supply unit. A hot water storage function that stores hot water in the hot water tank, a boiling function that heats the bath water in the hot tub, and a hot water supply tank simply by connecting the hot tub piping between the heat pump unit and the bath tub. A hot water pouring function for pouring hot water in the bath tub.
A second embodiment according to the present invention is directed to a water heater according to the first embodiment, in which a cold water side pouring branched from a hot water supply pipe located on an inflow side of a hot water heat exchanger in a heat pump unit. Connect the piping, the hot water pouring pipe branched from the hot water pipe located on the outflow side of the hot water heat exchanger, the cold water pouring pipe, and the hot water pouring pipe to the inlet connection port. And a pouring pipe connecting the outflow-side connection port of the mixing valve and the bathtub pipe. According to the present embodiment, it is possible to guide cold water and hot water to the bathtub pipe by using the hot water supply pipe, and to control the hot water temperature by using the cold water and hot water when guiding the cold water and the hot water to the hot water supply pipe. .
In the water heater according to the third embodiment of the present invention, a heat pump unit and a hot water supply unit are connected by a hot water supply pipe, a heat pump unit and a bathtub are connected by a bathtub pipe, and a pouring function is provided in the hot water supply tank. After the hot water is led to the heat pump unit using the pouring pipe, the hot water is led to the bathtub using the bathtub pipe. According to the present embodiment, the hot water in the hot water supply tank is guided to the heat pump unit using the pipe for pouring, and then guided to the bathtub using the pipe for the bathtub. Simply connect the hot water supply pipe to the hot water supply pipe and connect the bathtub pipe between the heat pump unit and the bathtub to heat the hot water in the hot water tank and heat the bathtub water in the bathtub. It can have a boiling function and a pouring function of pouring hot water in the hot water supply tank into the bathtub.
A fourth embodiment according to the present invention is directed to a hot water supply apparatus according to the third embodiment, in which a heat pump unit, a hot water supply unit, a cold water-side pouring for guiding water supply from stored water or tap water in a hot water tank. Piping, a hot-water pouring pipe for guiding hot water in the hot-water supply tank, a mixing valve for connecting the cold-water pouring pipe and the hot-water pouring pipe to the inflow-side connection port, and an outflow side of the mixing valve A pouring pipe connected to the connection port, wherein the pouring pipe is connected to a bathtub pipe in the heat pump unit. According to the present embodiment, it is possible to guide cold water and hot water to the bathtub pipe by using the hot water supply pipe, and to control the hot water temperature by using the cold water and hot water when guiding the cold water and the hot water to the hot water supply pipe. .
A fifth embodiment according to the present invention is a water heater according to the first to fourth embodiments, in which the heat exchanger for hot water supply includes a first heat exchanger for hot water supply and a second heat exchanger for hot water supply. The first hot water supply heat exchanger and the second hot water supply heat exchanger can be selectively used, and the hot water supply pipe is a secondary pipe of the first hot water supply heat exchanger. The bathtub piping is a secondary piping of the second hot water supply heat exchanger. According to the present embodiment, a hot water storage function for storing hot water in a hot water supply tank and a boiling function for heating bath water in a bath tub can be selectively switched and used. It is possible to promptly respond to user requests.
A sixth embodiment according to the present invention is directed to a water heater according to the fifth embodiment, wherein an expansion valve is provided between the first heat exchanger and the second heat exchanger. Is operated, the second hot water supply heat exchanger functions as an evaporator. According to the present embodiment, by making the second hot water supply heat exchanger function as an evaporator, a hot water storage function can be performed using hot water in the bathtub.
In the seventh embodiment according to the present invention, in the water heater according to the first to fourth embodiments, the refrigerant used for the refrigeration cycle is carbon dioxide, and the high-pressure side is operated in a state exceeding the critical pressure. According to the present embodiment, by using carbon dioxide as the refrigerant, the water heater can be used at a high temperature, and the hot water storage function and the boiling function can be improved.
[0008]
【Example】
Hereinafter, a water heater according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a circuit diagram of a water heater according to one embodiment of the present invention.
The hot water supply apparatus according to the present embodiment includes a hot water supply unit 10, a heat pump unit 60, and a bathtub 70.
Hot water supply unit 10 includes hot water supply tank 11 for storing hot water, and circulation pump 12 for guiding low-temperature water in hot water supply tank 11 to heat pump unit 60 and returning the hot water heated by heat pump unit 60 to hot water supply tank 11. I have.
The heat pump unit 60 has a compressor 61, a first hot water supply heat exchanger 62A, an expansion valve 63A, a second hot water supply heat exchanger 62B, an expansion valve 63B, and an evaporator 64 connected in a ring shape by piping, and Make up the cycle. In this refrigeration cycle, an on-off valve 65A is provided on a pipe that bypasses the first hot water supply heat exchanger 62A, and an on-off valve 65B is provided on a pipe that bypasses the second hot water supply heat exchanger 62B.
The first hot water supply heat exchanger 62 </ b> A exchanges heat between a heat source side pipe constituting the refrigeration cycle and a utilization side pipe constituting the hot water supply unit 10.
The second hot water supply heat exchanger 62 </ b> B exchanges heat between a heat source side pipe constituting the refrigeration cycle and a bathtub pipe 72 for guiding hot water to the bathtub 70.
In order to obtain high-temperature water in the hot water supply unit 10 and the bath 70, the refrigeration cycle is preferably operated at a pressure exceeding the critical pressure using carbon dioxide as a refrigerant.
[0009]
One end of the hot water supply pipe 41 is connected to the bottom of the hot water supply tank 11 to constitute a utilization side pipe of the first hot water supply heat exchanger 62A, and the other end is connected to the upper part of the hot water supply tank 11 and A circulation pump 12 is provided. An upstream pipe of the circulation pump 12 is provided with a bypass pipe that bypasses a downstream pipe of the first hot water supply heat exchanger 62A, and a bypass pipe and a downstream pipe of the first hot water supply heat exchanger 62A. Is provided with a three-way valve 29.
One side of the two-way valve 24 is connected to a water supply pipe such as a water pipe, and the other side is connected to a water discharge pipe 43 in the hot water supply unit 10.
The mixing valve 25 has a hot water outlet pipe 42 connected to one inlet side connection port, a water outlet pipe 43 connected to the other inlet side connection port, and a use side pipe 44 connected to the outlet side connection port. In addition, one end of the hot water supply pipe 42 is connected to an upper part of the hot water supply tank 11. One end of the use side pipe 44 is connected to a hot water supply faucet such as a bathroom, a kitchen, or a washroom. The water supply pipe 45 branches off from the middle of the water discharge pipe 43 and is connected to the bottom of the hot water supply tank 11.
[0010]
Boiling means for heating the bath water in the bath 70 guides the bath water in the bath 70 to the second hot water supply heat exchanger 62B, and converts the hot water heated in the second hot water supply heat exchanger 62B into the bath water 70B. And a circulation pump 71 for circulating hot water in the bathtub piping 72.
A pouring means for pouring into the bathtub 70 includes a cold water-side pouring pipe 74A branched from the hot water supply pipe 41 located on the inflow side of the first hot water supply heat exchanger 62A in the heat pump unit 60; The hot water-side pouring pipe 74B branched from the hot-water supply pipe 41 located on the outflow side of the first hot-water supply heat exchanger 62A, the cold-water-side pouring pipe 74A, and the hot-water-side pouring pipe 74B flow in. It comprises a mixing valve 73 connected to the side connection port, and a pouring pipe 75 connecting the outflow side connection port of the mixing valve 73 and the bathtub pipe 72, and an opening / closing valve 76 is provided in the pouring pipe 75. Have been.
[0011]
First, the boiling operation of the hot water supply tank will be described.
By operating the circulation pump 12, the water flowing out from the lower part of the hot water supply tank 11 passes through the circulation pump 12, the first heat exchanger 62A for hot water supply, the three-way valve 29 in this order, and flows in again from the upper part of the hot water supply tank 11. .
On the other hand, the heat pump unit 60 also operates. At this time, the on-off valve 65A is closed, the expansion valve 63A is fully open, and the on-off valve 65B is open. Therefore, the refrigerant compressed by the compressor 61 radiates heat in the first hot water supply heat exchanger 62A, is decompressed by the expansion valve 63B, absorbs heat in the evaporator 64, and is sucked into the compressor 61 in a gaseous state. Is done.
Thus, in the first hot water supply heat exchanger 62A, the heat of the refrigerant flowing through the refrigeration cycle is transmitted to the water flowing through the hot water supply pipe 41, and the heated water becomes hot water and is stored in the hot water supply tank 11. At this time, the heated hot water flows in from the upper portion of the hot water supply tank 11 and the cold water flows out from the lower portion of the hot water supply tank 11, so that the hot water is stored in the upper portion of the hot water supply tank 11, and the hot water layer becomes gradually thicker. Become. Then, a state in which sufficient hot water is accumulated in hot water supply tank 11 is detected by a temperature sensor (not shown) provided on the lower side of hot water supply tank 11, and the boiling operation is terminated.
[0012]
Next, a hot water supply operation when hot water in the hot water supply tank is used for hot water supply will be described.
By opening the faucet connected to the use side pipe 44, hot water can be used. The hot water supply temperature is adjusted by changing the mixing ratio of the inflow-side flow path of the mixing valve 25. To increase the hot water supply temperature, the inflow from the hot water supply pipe 42 is increased, and to lower the hot water supply temperature, the inflow from the water discharge pipe 43 is increased.
The pressure in the hot water supply tank 11 decreases due to the hot water flowing out of the hot water supply pipe 42. Therefore, water flows into the hot water supply tank 11 from the water supply pipe 45 by the amount of hot water flowing out of the hot water supply pipe 42. Then, when the temperature sensor detects that the amount of hot water in the hot water supply tank 11 has become smaller than the predetermined amount, the boiling operation is restarted.
[0013]
Next, a description will be given of a bath tub boiling operation when the bath water in the bath tub 70 is heated.
By operating the circulation pump 71, the bathtub water in the bathtub 70 passes through the circulation pump 71 and the second hot water supply heat exchanger 62B in this order, and is again guided to the bathtub 70.
On the other hand, the heat pump unit 60 also operates. At this time, the on-off valve 65A is open, the expansion valve 63A is fully open, and the on-off valve 65B is closed. Therefore, the refrigerant compressed by the compressor 61 radiates heat in the second hot water supply heat exchanger 62B, is decompressed by the expansion valve 63B, absorbs heat in the evaporator 64, and is sucked into the compressor 61 in a gaseous state. Is done.
Thus, in the second hot water supply heat exchanger 62B, the heat of the refrigerant flowing through the refrigeration cycle is transmitted to the water flowing through the bathtub piping 72, and the heated water becomes hot water and is guided into the bathtub 70.
[0014]
Next, a pouring operation in which hot water stored in hot water supply tank 11 is poured into bathtub 70 will be described.
By opening the on-off valve 76, water from a water supply pipe such as a water pipe is introduced from the cold water pouring pipe 74A, and hot water from the top of the hot water supply tank 11 is supplied from the hot water pouring pipe 74B. be introduced.
The pressure in the hot water supply tank 11 decreases due to hot water flowing out of the hot water supply pipe 41. Therefore, water flows into the hot water supply tank 11 from the hot water supply pipe 45 by the amount of hot water flowing out of the hot water supply pipe 41.
The water introduced from the cold-water pouring pipe 74A and the hot water introduced from the hot-water pouring pipe 74B are adjusted to the set temperature by the mixing valve 73, and are passed through the pouring pipe 75 into the bathtub. Is introduced into the bathtub 70 from the piping 72 for use.
[0015]
Next, the boiling operation of the hot water supply tank using the hot water in the bathtub 70 will be described.
By operating the circulation pump 12, the water flowing out from the lower part of the hot water supply tank 11 passes through the circulation pump 12, the first heat exchanger 62A for hot water supply, the three-way valve 29 in this order, and flows in again from the upper part of the hot water supply tank 11. .
On the other hand, in the heat pump unit 60, the on-off valve 65A is closed, the expansion valve 63A is set to an appropriate throttle amount, and the on-off valve 65B is closed. Accordingly, the refrigerant compressed by the compressor 61 radiates heat in the first hot water supply heat exchanger 62A and is decompressed by the expansion valve 63A, and then absorbs heat in the second hot water supply heat exchanger 62B and the evaporator 64. Then, it is sucked into the compressor 61 in a gaseous state. At this time, the bathtub water in the bathtub 70 operates the circulation pump 71 to circulate the bathtub piping 72.
As described above, in the second hot water supply heat exchanger 62B, the heat of the bathtub water flowing through the bathtub piping 72 is transmitted to the refrigerant flowing through the refrigeration cycle, and in the first hot water supply heat exchanger 62A, the refrigeration cycle is transmitted. The heat of the flowing refrigerant is transmitted to the water flowing through the hot water supply pipe 41, and the heated water becomes hot water and is stored in the hot water supply tank 11.
[0016]
Hereinafter, a water heater according to another embodiment of the present invention will be described with reference to the drawings. Note that members having the same functions are given the same numbers, and descriptions thereof are omitted.
FIG. 2 is a circuit configuration diagram of the water heater according to the present embodiment.
The water heater according to the present embodiment is different from the above embodiment in the configuration of the pouring means.
The pouring means according to the present embodiment includes a cold water-side pouring pipe 54A branched from the water discharge pipe 43, a hot water-side pouring pipe 54B branched from the hot water pipe 42, a cold water-side pouring pipe 54A, and hot water. A mixing valve 53 connecting the side pouring pipe 54B to the inflow-side connection port, a pouring pipe 55 connected to the outflow-side connection port of the mixing valve 53, and an opening / closing valve provided in the pouring pipe 55 The pouring pipe 55 is connected to a bathtub pipe 72.
In the present embodiment, the cold water-side pouring pipe 54A, the hot water-side pouring pipe 54B, the mixing valve 53, and the on-off valve 56 that constitute the pouring means are provided in the hot water supply unit 10, and the pouring pipe 55 It is connected with the bathtub piping 72 in the heat pump unit 60 by the. Therefore, the bathtub 70 is connected only to the heat pump unit 60 and the bathtub piping 72, and by providing the pouring means, there is no need to provide another piping between the hot water supply unit 10 and the bathtub 70.
In this embodiment, the operation of boiling the hot water supply tank, the operation of hot water supply when the hot water in the hot water supply tank is used for hot water supply, the operation of boiling the hot tub in the bath tub 70, the boiling operation of the hot water supply tank using the hot water in the bath tub 70, Since the raising operation is the same as in the above embodiment, the description is omitted.
[0017]
Hereinafter, a pouring operation for pouring hot water stored in hot water supply tank 11 into bathtub 70 will be described.
By opening the on-off valve 56, water from a water supply pipe such as a water pipe is introduced from the cold water pouring pipe 54A, and hot water from the upper part of the hot water supply tank 11 is supplied from the hot water pouring pipe 54B. be introduced.
The pressure in the hot water supply tank 11 decreases due to the hot water flowing out of the hot water supply pipe 42. Therefore, water flows into the hot water supply tank 11 from the water supply pipe 45 by the amount of hot water flowing out of the hot water supply pipe 42.
The water introduced from the cold-water-side pouring pipe 54A and the hot water introduced from the hot-water-side pouring pipe 54B are adjusted to a set temperature by the mixing valve 53, and are passed through the pouring pipe 55 into the bathtub. Is introduced into the bathtub 70 from the piping 72 for use.
[0018]
【The invention's effect】
According to the present invention, a hot water supply pipe is connected between the heat pump unit and the hot water supply unit, and a bathtub pipe is connected between the heat pump unit and the bathtub, and a hot water storage function for storing hot water in the hot water supply tank is provided. It can have a boiling function of heating bath water in the bathtub and a pouring function of pouring warm water in the hot water supply tank into the bathtub.
Further, according to the present invention, a hot water supply pipe and a hot water supply pipe are connected between the heat pump unit and the hot water supply unit, and a bathtub pipe is connected between the heat pump unit and the bathtub. A hot water storage function for storing hot water, a boiling function for heating bath water in the bathtub, and a pouring function for pouring hot water in the hot water supply tank into the bathtub.
[Brief description of the drawings]
FIG. 1 is a circuit diagram of a water heater according to one embodiment of the present invention. FIG. 2 is a circuit diagram of a water heater according to another embodiment of the present invention.
Reference Signs List 10 hot water supply unit 11 hot water supply tank 12 circulation pump 13 heating heat exchanger 14 circulation pump 54A cold water side pouring pipe 54B hot water side pouring pipe 55 pouring pipe 56 opening / closing valve 60 heat pump unit 61 compressor 62A first Hot water supply heat exchanger 62B Second hot water supply heat exchanger 63A Expansion valve 63B Expansion valve 64 Evaporator 70 Bathtub 72 Bathtub piping 73 Mixing valve 74A Cold water pouring tube 74B Hot water pouring tube 75 Pouring Piping 76 On-off valve

Claims (7)

A heat pump unit having a refrigerating cycle in which a compressor, a hot water supply heat exchanger, an expansion valve, and an evaporator are connected by piping; and a hot water supply unit having a hot water supply tank, wherein the hot water supply tank is provided using the hot water supply heat exchanger. A hot water storage function of storing hot water therein, a boiling function of heating bathtub water in a bathtub using the hot water supply heat exchanger, and a pouring function of pouring hot water in the hot water supply tank into the bathtub. A water heater with
A hot water supply pipe that guides water supplied from stored water or tap water in the hot water supply tank to the hot water supply heat exchanger, and guides hot water heated by the hot water supply heat exchanger to the hot water supply tank,
A bathtub pipe for guiding bathtub water in the bathtub to the hot water supply heat exchanger, and guiding hot water heated by the hot water supply heat exchanger to the bathtub;
The heat pump unit and the hot water supply unit are connected by the hot water supply pipe, and the heat pump unit and the bathtub are connected by the bathtub pipe.
The hot water supply apparatus is characterized in that the hot water supply function guides hot water in the hot water supply tank to the heat pump unit using the hot water supply pipe, and then guides the hot water to the bath tub using the bath tub pipe. In the heat pump unit, a cold water-side pouring pipe branched from a hot water supply pipe located on an inflow side of the hot water supply heat exchanger, and a hot water supply pipe located on an outflow side of the hot water supply heat exchanger. A hot water side pouring pipe, a mixing valve for connecting the cold water side pouring pipe and the hot water side pouring pipe to an inflow side connection port, an outflow side connection port of the mixing valve and the bathtub. The hot water heater according to claim 1, further comprising a pouring pipe connected to the pipe. A heat pump unit having a refrigerating cycle in which a compressor, a hot water supply heat exchanger, an expansion valve, and an evaporator are connected by piping; and a hot water supply unit having a hot water supply tank, wherein the hot water supply tank is provided using the hot water supply heat exchanger. A hot water storage function of storing hot water therein, a boiling function of heating bathtub water in a bathtub using the hot water supply heat exchanger, and a pouring function of pouring hot water in the hot water supply tank into the bathtub. A water heater with
A hot water supply pipe that guides water supplied from stored water or tap water in the hot water supply tank to the hot water supply heat exchanger, and guides hot water heated by the hot water supply heat exchanger to the hot water supply tank,
A bathtub pipe for guiding bathtub water in the bathtub to the hot water supply heat exchanger, and guiding hot water heated by the hot water supply heat exchanger to the bathtub;
The heat pump unit and the hot water supply unit are connected by the hot water supply pipe, and the heat pump unit and the bathtub are connected by the bathtub pipe.
The hot water supply apparatus is characterized in that the hot water supply function guides hot water in the hot water supply tank to the heat pump unit using a hot water supply pipe, and then guides the hot water to the bath tub using the hot tub pipe. In the hot water supply unit, a cold water-side pouring pipe that guides water supply from stored water or tap water in the hot water tank, a hot water-side pouring pipe that guides hot water in the hot water tank, and the cold water-side pouring. A mixing valve for connecting the hot water-side pouring pipe and the hot water-side pouring pipe to an inflow-side connection port, and a pouring pipe connected to an outflow-side connection port of the mixing valve. The water heater according to claim 3, wherein the water heater is connected to the bathtub piping in a heat pump unit. The hot water supply heat exchanger includes a first hot water supply heat exchanger and a second hot water supply heat exchanger, and the first hot water supply heat exchanger and the second hot water supply heat exchanger The hot water supply pipe may be used as a secondary pipe of the first hot water supply heat exchanger, and the bathtub pipe may be used as a secondary pipe of the second hot water supply heat exchanger. The water heater according to any one of claims 1 to 4, wherein the water heater is a side pipe. An expansion valve is provided between the first hot water supply heat exchanger and the second hot water supply heat exchanger, and when the expansion valve is operated, the second hot water supply heat exchanger evaporates. The water heater according to claim 5, which functions as a water heater. The water heater according to any one of claims 1 to 4, wherein the refrigerant used in the refrigeration cycle is carbon dioxide, and the refrigerant is operated at a pressure higher than a critical pressure.

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