JP3857221B2 - Heat pump water heater / heater - Google Patents

Description

[0001]
The present invention relates to a heat pump hot water supply and heating device that circulates hot water in a lower part of a hot water tank that has little influence on hot water supply, and uses the heat of the circulated hot water to radiate heat from a heating panel.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a heat pump hot water supply and heating device includes a heat pump 10, a hot water circuit 20, a heating circuit 30, and a control device 40 as described in, for example, Japanese Patent Application Laid-Open No. 2002-89867. The control means 40 which received the instruction | indication of the heating operation of the floor heating panel 32 performs a heating initial mode first. In this mode, the hot water circuit 20 and the heating circuit 30 are operated. Thereby, the heat medium of the heating circuit 30 receives heat from the hot water of the hot water circuit 20 by the heat exchanger 11 of the heat pump 10 and dissipates heat by the floor heating panel 32. As a result, the floor heating panel 32 can be quickly heated. The control means 40 then switches to the heating normal mode. In this mode, the refrigerant circuit 12 and the heating circuit 30 of the heat pump 10 are operated, and the heat medium receives heat from the refrigerant by the heat exchanger 11 and radiates heat by the floor heating panel 32.
[0003]
However, according to such a heat pump hot water supply and heating device, in the normal heating mode, the refrigerant circuit 12 and the heating circuit 30 of the heat pump 10 are operated, and heat is applied to the heating circuit 30 by the operation of the refrigerant circuit 12, so that the hot water storage tank 25 The hot water inside is used for heating operation only in the heating initial mode.
[0004]
By the way, the hot water storage mode of this type of heat pump hot-water supply and heating device is usually executed in a time zone where the electricity bill is cheap at night. The hot water stored in the low electricity bill is used by supplying hot water to the kitchen or bathtub. However, there are many cases where the hot water stored in the hot water storage tank cannot be used up, particularly in a case having a large-capacity hot water storage tank. Therefore, it is desired to use the unusable hot water for hot water utilization equipment such as a heating panel to effectively use energy.
[0005]
[Problems to be solved by the invention]
However, in the heat pump hot water supply and heating device described in Japanese Patent Application Laid-Open No. 2002-89867, the hot water stored in the hot water tank stored in the nighttime cheap time zone is used for heating operation only in the heating initial mode, and in the heating normal mode thereafter. The heat pump is operated with the normal electricity charge during the daytime, and the heating operation is performed. However, it was not always satisfactory in terms of effective use of energy.
[0006]
This invention is made | formed in view of such a point, and it aims at providing the heat pump hot-water supply heating apparatus which can aim at effective utilization of energy using the warm water of the hot water tank lower part also in heating normal mode.
[0007]
[Means for Solving the Problems]
The heat pump hot water supply and heating device according to claim 1 is a heat pump unit in which a compressor, a refrigerant heat exchanger, an evaporator as a heat collector and the like are sequentially connected in series to circulate the refrigerant, and a hot water storage tank from the lower part to the upper part of the hot water tank. A hot water circulation circuit for laminating hot water, which is circulated by a hydrothermal exchange pump and heat-exchanged with the refrigerant heat exchanger, from the upper part of the hot water tank, and a hot water tank A heating normal circulation path having a heat exchanger for heating by circulating hot water from the lower part to the lower part of the hot water tank by the hydrothermal circulation pump, and hot water in the heating normal circulation path is circulated by the circulation pump for heating to exchange the heating heat In the heat pump hot water supply and heating device provided with a heating medium circulation path for heat exchange by a heat exchanger to dissipate heat from the heating panel, a return water temperature sensor is provided on the return side of the heating medium circulation path, and the heating medium circulation heating is provided. When the temperature detected by the return water temperature sensor is higher than the predetermined temperature during road operation, the hydrothermal circulation pump is operated to circulate the hot water at the bottom of the hot water tank and perform the heating operation with the heat of the hot water. When the temperature detected by the sensor detects a temperature equal to or lower than a predetermined temperature, the heat pump unit boils the hot water in the normal heating circuit and performs the heating operation.
[0008]
And by this structure, also in heating normal operation, the heating operation using the hot water of the lower part in a hot water tank is performed, and effective utilization of energy can be aimed at.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0010]
【Example】
As shown in FIG. 1, the heat pump hot water supply / room heating device 1 includes a hot water storage unit 2, a heat pump unit 3, and a heating unit 4.
[0011]
The hot water storage unit 2 includes a hot water storage tank 5, which employs a first-stop push-up hot water supply method, and a water supply pipe that supplies tap water to the lower part of the hot water storage tank 5 via a pressure reducing valve 6. 7 is connected, and a hot water supply pipe 8 for supplying hot water to a hot water supply destination such as a kitchen or a bathroom is connected to the upper part.
[0012]
Connected to the hot water tank 5 is a boiling circulation path 9 that exits from the lower part of the hot water tank 5 and returns to the upper part of the hot water tank 5. A three-way valve 10 from the lower side of the hot water tank 5 and an intermediate portion of the hot water circulation path 9 exit from the hot water storage unit 2 and are arranged in the heat pump unit 3. A hydrothermal circulation pump 11 and a water heat exchanger 12 for forcibly drawing hot water in the lower part of the hot water tank 5 into the boiling circulation path 9 and circulating it in the upper part of the hot water tank 5 are provided. Between the water heat exchanger 12 and the upper part of the hot water storage tank 5, a switching valve 13 is disposed as a flow rate regulator.
[0013]
The hot water storage tank 5 is connected to a heating initial circuit 14 for extracting hot water from the upper part of the hot water tank 5 and circulating the hot water in the lower part of the hot water tank 5. The heating initial circulation path 14 includes a first branch path 15, a three-way valve 10, a hydrothermal exchange pump 11, a water heat exchanger 12, a switching valve 13, a heating heat exchanger 18, The two branch paths 16 and the lower part of the hot water storage tank 5 are sequentially connected.
[0014]
In addition, a heating normal circulation path 17 is connected to the lower part of the hot water tank 5 to circulate hot water from the lower part of the hot water tank 5 to the lower part of the hot water tank 5. A three-way valve 10, a hydrothermal circulation pump 11, a water heat exchanger 12, a switching valve 13, a heating heat exchanger 18, and a second branch path 16 are sequentially connected to the heating normal circulation path 17.
[0015]
The heat pump unit 3 has a refrigerant circulation path 19 filled with a refrigerant. The refrigerant circulation path 19 is a four-way valve 21 that is used by reversing the flow direction of the refrigerant during the defrosting operation of the compressor 20 and the evaporator. The refrigerant heat exchanger 22 and the expansion valve 23 function as a condenser and heat-exchange the hot water flowing through the boiling circulation path 9 with the water heat exchanger 12 to bring the hot water to a predetermined boiling temperature. And the evaporator 24 as a heat collector is connected in order. Further, the evaporator 24 includes a temperature sensor 25 that detects the temperature of the evaporator 24 for executing the defrosting operation of the evaporator 24, a blower fan 26 that sends outside air to the evaporator 24, and the blower fan 26. A blower motor 27 is provided.
[0016]
The heating unit 4 includes a heating medium circulation path 28 filled with a heating medium. The heating medium circulation path 28 includes a heating heat exchanger 18, a floor radiator, a heat radiating unit 29 a such as a panel heater, A heat dissipating part 29b, a cistern 30 whose upper part is opened to the atmosphere, a circulation pump 31 for heating, and a return water temperature sensor 40 are sequentially connected. In addition, a water supply path 33 for supplying tap water to the systern 30 through an electromagnetic valve 32 is connected.
[0017]
Reference numeral 34 denotes a remote controller. The remote controller 34 is provided on a wall surface of a kitchen or the like, and has an operation unit for selecting a hot water storage operation, a hot water supply operation, a heating operation, etc., and a display means for displaying these operation states. Yes.
[0018]
Reference numeral 35 denotes a control device as an operation control means. This control device 35 operates the heat pump unit 3 while switching the three-way valve 10 and the switching valve 13 appropriately by the operation of the remote controller 34 so as to circulate the heating circuit 9. Thus, the boiling control of the hot water in the hot water tank 5 is performed, the hot water in the hot water tank 5 is circulated, and the heating medium in the heating medium circulation path 28 is circulated to execute the heating operation.
[0019]
Next, the operation of the present embodiment will be described.
[0020]
First, the action of boiling water in the hot water tank 5 will be described with reference to FIG.
[0021]
Tap water is stored in the hot water storage tank 5 from the water supply pipe 7 through the pressure reducing valve 6. Then, the control device 35 is controlled by operating the remote controller 34, the three-way valve 10 is switched to the boiling circuit 9 side, and the flow rate adjusting valve 13 is 100% of hot water on the boiling circuit 9 side. Adjusted to flow. Then, the compressor 20 of the heat pump unit 3 is driven. Thereby, as shown by the arrow, the refrigerant flows in the order of the compressor 20 of the refrigerant circuit 19, the four-way valve 21, the refrigerant heat exchanger 22 functioning as a condenser, the expansion valve 23, and the evaporator 24. The refrigerant that has collected atmospheric heat by the evaporator 20 and is vaporized is sent to the compressor 20, and the high-temperature and high-pressure refrigerant gas that is compressed by the compressor 20 is heat-exchanged by the refrigerant heat exchanger 22.
[0022]
On the other hand, the boiling circulation pump 11 of the boiling circulation path 9 is driven, and the hot water in the lower part of the hot water storage tank 5 passes through the boiling circulation path 9 as shown by the arrow, and the water heat exchanger 12 and the refrigerant heat exchanger 22 are moved. The hot water in the boiling circulation path 9 is exchanged with the hot water to enter the upper part of the hot water tank 5, and this process is repeated to successively stack hot water of about 80 ° C. from the upper part of the hot water tank 5. Hot water in the hot water tank 5 is boiled. And the hot water laminated | stacked in the hot water storage tank 5 in this way is sent, for example to a kitchen or a bathtub through the hot water supply pipe 8, hot water is supplied, or heat is applied to the heating circuit and used for heating operation or the like.
[0023]
Next, the operation in the initial stage of the heating operation will be described with reference to FIG.
[0024]
The control device 35 is controlled by the operation of the remote controller 34 so that the three-way valve 10 is switched to the first branch path 15 side, and the switching valve 13 is such that 100% of hot water flows to the second branch path 17 side. It adjusts and the heating initial circuit 14 is comprised. Next, the hydrothermal circulation pump 11 is driven. For example, when the outside air temperature is less than 10 ° C., 200 L of hot water of about 80 ° C. in the hot water storage tank 5 is supplied from the upper part of the hot water storage tank 5 to the three-way valve 10 and the water heat exchanger. 12, it is circulated to the lower part of the hot water tank 5 through the switching valve 13 and the heat exchanger 18 for heating.
[0025]
On the other hand, the heating circulation pump 31 of the heating unit 4 is driven to circulate the heat medium circulating in the heating medium circulation path 28. Then, the heat of hot water of about 80 ° C. flowing through the heating initial circulation path 14 is immediately heat-exchanged by the heating heat exchanger 18 and dispersed from the heat radiating section 29a and the heat radiating section 29b to be radiated to perform the heating operation. The Further, the hot water in the heating initial circulation path 14 that has been heat-exchanged by the heating heat exchanger 18 and cooled to about 70 ° C. is returned to the lower part of the hot water tank 5 and does not mix with the hot water in the upper part of the hot water tank 5. . And the heating operation through the heating initial circuit 14 is repeated for about 50 minutes, for example.
[0026]
Next, the effect | action at the time of heating normal operation is demonstrated with FIG.
[0027]
When the heating operation through the heating initial circulation path 14 has elapsed for about 50 minutes, the control device 35 switches to the normal heating operation through the heating normal circulation path 17. That is, the three-way valve 10 is switched to the water heat exchanger 12 side under the control of the control device 35, and the switching valve 13 is switched so that 100% of the warm water flows to the second branch path 16 side. The heating normal circulation path 17 returning to the lower part of the hot water tank 5 through the water heat exchanger 12, the switching valve 13, the heating heat exchanger 18, and the second branch path 17 is formed. Then, the hydrothermal circulation pump 11 is driven, and through the heating normal circulation path 17, the hot water in the lower part of the hot water tank 5 comes out from the lower part of the hot water tank 5 and returns to the lower part of the hot water tank 5. Therefore, it does not mix with the upper part of the hot water tank 5.
[0028]
On the other hand, as in the initial stage of the heating operation, the heat of the hot water flowing in the heating normal circulation path 17 is heat-exchanged to the heat medium flowing in the heating circulation path 28 via the heating heat exchanger 18, and the heat radiating unit 29a, The normal heating operation in which the heat is radiated from 29b and the heating circulation pump 31 is driven is continued. The normal heating operation is repeated until the temperature detected by the return water temperature sensor 40 provided on the return side of the heating circuit 28 detects a predetermined temperature or lower. Therefore, during the normal heating operation, the heating operation using the heat of the hot water in the lower part of the hot water tank 5 is performed without operating the heat pump unit 3, and the energy can be effectively used.
[0029]
Next, the operation during heating heat pump operation will be described with reference to FIG.
[0030]
When the heating operation through the heating normal circulation path 14 is repeatedly performed, the temperature of the hot water exchanged by the heat exchanger 18 for heating gradually decreases, and as a result, the temperature of the heat medium flowing through the heating circulation path 28 gradually increases. Thus, the detection temperature of the return water temperature detection sensor 40 provided on the return side of the heating medium circulation passage 28 is detected to be equal to or lower than a predetermined temperature. And if the detection temperature of the return water temperature detection sensor 40 detects below a predetermined temperature, the control apparatus 35 will drive-control the heat pump unit 3. FIG. By the operation of the heat pump unit 3, the hot water in the heating normal circulation path 14 is reheated by the refrigerant heat exchanger 22 through the water heat exchanger 12, and the heating operation by the operation of the heat pump unit 3 is performed.
[0031]
【The invention's effect】
According to the heat pump hot water supply and heating device of the first aspect, even in the normal heating operation, the heating operation using the hot water in the lower part of the hot water tank is executed, and the energy is effectively used.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram illustrating a configuration of a heat pump hot water supply / room heating device according to an embodiment of the present invention.
FIG. 2 is an explanatory view for explaining the action at the time of boiling of the heat pump hot water supply / room heating device.
FIG. 3 is an explanatory view for explaining the operation in the early stage of the heating operation of the heat pump hot water supply / room heating device.
FIG. 4 is an explanatory view for explaining the operation during normal heating operation of the heat pump hot water supply / room heating device.
FIG. 5 is an explanatory view for explaining the operation of the heating operation by the heat pump of the heat pump hot water supply / room heating device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heat pump hot water supply and heating apparatus 2 Hot water storage unit 3 Heat pump unit 4 Heating unit 5 Hot water storage tank 9 Boiling circuit 10 Three-way valve 11 Hydrothermal circulation pump 12 Hydrothermal exchanger 13 Switching valve 14 as a flow controller Heating initial circuit DESCRIPTION OF SYMBOLS 15 1st branch path 16 2nd branch path 17 Heating normal circulation path 18 Heating heat exchanger 19 Refrigerant circulation path 20 Compressor 21 Four-way valve 22 Refrigerant heat exchanger 23 Expansion valve 24 Evaporator 25 Temperature sensor 28 Heating Heating medium circulation paths 29a, 29b Radiating section 31 Heating circulation pump 34 Remote control 35 Control device 40 Return water temperature sensor

Claims (1)

A compressor, refrigerant heat exchanger, evaporator as a heat collector, etc. are sequentially connected in series to circulate the refrigerant, and hot water in the hot water tank is circulated from the bottom to the top of the hot water tank by a hydrothermal circulation pump. A heating circulation path for laminating hot water heat-exchanged by a water heat exchanger that exchanges heat with the refrigerant heat exchanger from the upper part of the hot water tank, and the hydrothermal circulation from the lower part of the hot water tank to the lower part of the hot water tank Heating normal circulation path having a heat exchanger for heating by circulating hot water by a pump, and hot water in the heating normal circulation path is circulated by a circulation pump for heating, heat is exchanged by the heating heat exchanger, and is radiated from the heating panel. In the heat pump hot water supply and heating device provided with the heating medium circulation path, a return water temperature sensor is provided on the return side of the heating medium circulation path, and the return water temperature sensor detects the heating medium circulation path operation. temperature When the temperature is above a predetermined temperature, when the hydrothermal circulation pump is operated to circulate the hot water at the bottom of the hot water tank and perform heating operation with the heat of the hot water, and when the temperature detected by the return water temperature sensor detects the temperature below the predetermined temperature Is a heat pump hot water supply and heating device, wherein the heating operation is performed by boiling the hot water in the heating normal circulation path by the heat pump unit.

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