JP2012057916A - Heat pump type hot water supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat pump type hot water supply device capable of improving a COP (coefficient of performance).SOLUTION: The hot water supply device has an economy mode carried out in the following manner. In a process of heating hot water stored in a hot water tank 37A, when an exit water temperature of the hot water stored in the hot water tank 37A is lower than a first target value, the pump output of a pump 31 is minimized by a controlling device 42 until the exit water temperature of the hot water stored in the hot water tank 37A reaches the first target value. When the exit water temperature of the hot water stored in the hot water tank 37A reaches the first target value, the pump output of the pump 31 is gradually increased to the maximum by the controlling device 42 while keeping the exit water temperature of the hot water stored in the hot water tank 37A to the first target value. When the exit water temperature of the hot water stored in the hot water tank 37A reaches a final target value and the entrance water temperature of the hot water stored in the hot water tank 37A reaches a desired target value, heating of the hot water stored in the hot water tank 37A is terminated.

Description

  The present invention relates to a heat pump type hot water supply apparatus that supplies hot water using a heat pump.

  As a heat pump type hot water supply apparatus that performs hot water supply using a heat pump, for example, one disclosed in Patent Document 1 is known.

JP 2008-39353 A

  Now, in the conventional heat pump type hot water supply apparatus that supplies hot water using a heat pump, in the hot water storage operation for storing high temperature hot water in the hot water tank (heat storage), for example, as shown by the broken line in FIG. Until the outlet temperature of the stored hot water reaches the final target value (for example, 60 ° C.), the pump output is reduced to the minimum, and when the outlet water temperature of the hot water stored in the hot water tank reaches the final target value The outlet water temperature of the hot water stored in the hot water tank is maintained at the final target value, the pump output is gradually increased to the maximum, and the inlet water temperature of the hot water stored in the hot water tank is desired When the target value (for example, 58 ° C.) is reached, the heating of the hot water stored in the hot water tank is terminated.

However, when such hot water storage operation is performed, there is a problem that the difference between the high pressure and the low pressure of the refrigerant circuit becomes large, and the COP (Coefficient Of Performance) is lowered.
Further, the COP decreases, so that the power for driving the compressor increases. When an electric motor is used to drive the compressor, the electric energy to be input to the electric motor increases. As a result, there is a problem that power consumption increases.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the heat pump type hot-water supply apparatus which can improve COP.

The present invention employs the following means in order to solve the above problems.
In the heat pump hot water supply apparatus according to the first aspect of the present invention, the refrigerant sent out by the compressor circulates in a closed circuit refrigerant circuit including an outdoor heat exchanger and an indoor heat exchanger, and changes the state of the gas-liquid state. Repeatingly, the refrigerant system of the heat pump that can select the cooling cycle or the heating cycle by switching the circulation direction of the refrigerant circulating in the refrigerant circuit, and the water sent by the pump absorbs heat from the refrigerant in the indoor heat exchanger. A heat pump type hot water supply apparatus having a hot water and a water system including a hot water tank connected to a hot water circulation channel using a hot water heat source by circulating the hot water and connected to the hot water tank through a flow switching valve, A thermometer for measuring the outlet water temperature in the vicinity of the outlet of the hot water tank, and a controller for controlling the pump output of the pump based on the measured value sent from the thermometer, When heating the hot water stored in the tank, if the outlet water temperature of the hot water stored in the hot water tank is lower than the first target value, the outlet water temperature of the hot water stored in the hot water tank is When the pump output of the pump is reduced to the minimum by the control device until the first target value is reached, and the outlet water temperature of the hot water stored in the hot water tank reaches the first target value, the inside of the hot water tank The outlet of the hot water stored in the hot water tank is stored in the hot water tank so that the pump output of the pump is gradually increased to the maximum by the controller so that the outlet water temperature of the hot water stored in the hot water tank maintains the first target value. When the water temperature reaches the final target value and the inlet water temperature of the hot water stored in the hot water tank reaches a desired target value, an economy mode is provided to end the heating of the hot water stored in the hot water tank.

According to the heat pump type hot water supply apparatus according to the first aspect of the present invention, the difference between the high pressure and the low pressure of the refrigerant circuit can be made smaller than the conventional one, and the COP can be improved.
In addition, the improvement in COP can reduce the power for driving the compressor. When an electric motor is used to drive the compressor, the electric energy to be input to the electric motor Can be reduced, and power consumption can be reduced.

  In the heat pump type hot water supply apparatus according to the second aspect of the present invention, the refrigerant sent out by the compressor circulates in the closed circuit refrigerant circuit including the outdoor heat exchanger and the indoor heat exchanger to change the state of the gas and liquid. Repeatingly, the refrigerant system of the heat pump that can select the cooling cycle or the heating cycle by switching the circulation direction of the refrigerant circulating in the refrigerant circuit, and the water sent by the pump absorbs heat from the refrigerant in the indoor heat exchanger. A heat pump type hot water supply apparatus having a hot water and a water system including a hot water tank connected to a hot water circulation channel using a hot water heat source by circulating the hot water and connected to the hot water tank through a flow switching valve, A thermometer for measuring the outlet water temperature in the vicinity of the outlet of the hot water tank, and a controller for controlling the pump output of the pump based on the measured value sent from the thermometer, If the outlet water temperature of the hot water stored in the tank is lower than the first target value, the control device causes the controller to continue until the outlet water temperature of the hot water stored in the hot water tank reaches the first target value. When the pump output of the pump is reduced to the minimum and the outlet water temperature of the hot water stored in the hot water tank reaches the first target value, the outlet water temperature of the hot water stored in the hot water tank is the first target value. If the pump output of the pump is gradually increased to the maximum by the control device so that the outlet water temperature of the hot water stored in the hot water tank exceeds the first target value, the hot water tank Until the outlet water temperature of the hot water stored inside reaches the final target value, the pump output of the pump is again reduced to the minimum by the control device, and the outlet water temperature of the hot water stored in the hot water tank reaches the final target value. Reach Then, the outlet water temperature of the hot water stored in the hot water tank is maintained at the final target value, and the pump output of the pump is gradually increased again to the maximum by the control device, and the hot water tank When the stored hot water inlet water temperature reaches a desired target value, an economy mode is provided to end the heating of the hot water stored in the hot water tank.

According to the heat pump hot water supply apparatus according to the second aspect of the present invention, the outlet water temperature of the hot water stored in the hot water tank reaches the final target value earlier than the heat pump hot water supply apparatus according to the first aspect described above. Can be made.
Other functions and effects are the same as those of the heat pump type hot water supply apparatus according to the first aspect described above, and thus the description thereof is omitted here.

  The heat pump hot water supply apparatus according to the third aspect of the present invention includes the economy mode according to the first aspect described above and / or the economy mode according to the second aspect described above, and hot water stored in the hot water tank. When the outlet water temperature is lower than the final target value, the pump output of the pump is reduced to the minimum by the control device until the outlet water temperature of the hot water stored in the hot water tank reaches the final target value. When the outlet water temperature of the hot water stored in the tank reaches the final target value, the outlet temperature of the hot water stored in the hot water tank is maintained at the final target value, and the pump output of the pump is controlled by the controller. Is gradually increased to the maximum, and when the inlet water temperature of the warm water stored in the warm water tank reaches a desired target value, the warm water stored in the warm water tank is heated. And a quick mode that is configured to allow the user to select either the economy mode according to the first aspect described above and / or the economy mode according to the second aspect described above, and the quick mode. Has been.

According to the heat pump hot water supply apparatus according to the third aspect of the present invention, when the economy mode is selected by the user, the difference between the high pressure and the low pressure of the refrigerant circuit can be made smaller than the conventional one, COP can be improved.
In addition, the improvement in COP can reduce the power for driving the compressor. When an electric motor is used to drive the compressor, the electric energy to be input to the electric motor Can be reduced, and power consumption can be reduced.
On the other hand, when the quick mode is selected by the user, the outlet water temperature of the hot water stored in the hot water tank is changed to the heat pump hot water supply apparatus according to the first aspect and the heat pump hot water supply apparatus according to the second aspect. The final target value can be reached sooner.

  In the operating method of the heat pump type hot water supply apparatus according to the first aspect of the present invention, the refrigerant sent out by the compressor circulates in the closed circuit refrigerant circuit having the outdoor heat exchanger and the indoor heat exchanger, and The refrigerant system of the heat pump capable of selecting the cooling cycle or the heating cycle by switching the circulation direction of the refrigerant circulating in the refrigerant circuit while repeating the state change, and the water sent out by the pump from the refrigerant in the indoor heat exchanger A water system having a hot water tank connected to a hot water circulation passage that circulates the hot water and uses a hot water heat source and connected via a flow switching valve, and absorbs heat, and in the vicinity of the outlet of the hot water tank An operation method of a heat pump type hot water supply apparatus comprising a thermometer for measuring the outlet water temperature and a control device for controlling the pump output of the pump based on the measured value sent from the thermometer. When the hot water stored in the hot water tank is heated and the outlet water temperature of the hot water stored in the hot water tank is lower than the first target value, the hot water is stored in the hot water tank. Until the outlet water temperature of the hot water reaches the first target value, the pump output of the pump is reduced to the minimum, and when the outlet water temperature of the hot water stored in the hot water tank reaches the first target value, the inside of the hot water tank The outlet water temperature of the warm water stored in the hot water tank is maintained at the first target value, the pump output of the pump is gradually increased to the maximum, and the outlet water temperature of the warm water stored in the warm water tank is the final target value. When the temperature of the inlet water of the hot water stored in the hot water tank reaches a desired target value, the heating of the hot water stored in the hot water tank is terminated.

According to the operation method of the heat pump type hot water supply apparatus according to the first aspect of the present invention, the difference between the high pressure and the low pressure of the refrigerant circuit can be made smaller than the conventional one, and the COP can be improved.
In addition, the improvement in COP can reduce the power for driving the compressor. When an electric motor is used to drive the compressor, the electric energy to be input to the electric motor Can be reduced, and power consumption can be reduced.

  In the operation method of the heat pump type hot water supply apparatus according to the second aspect of the present invention, the refrigerant sent out by the compressor circulates through the closed circuit refrigerant circuit including the outdoor heat exchanger and the indoor heat exchanger, The refrigerant system of the heat pump capable of selecting the cooling cycle or the heating cycle by switching the circulation direction of the refrigerant circulating in the refrigerant circuit while repeating the state change, and the water sent out by the pump from the refrigerant in the indoor heat exchanger A water system having a hot water tank connected to a hot water circulation passage that circulates the hot water and uses a hot water heat source and connected via a flow switching valve, and absorbs heat, and in the vicinity of the outlet of the hot water tank An operation method of a heat pump type hot water supply apparatus comprising a thermometer for measuring the outlet water temperature and a control device for controlling the pump output of the pump based on the measured value sent from the thermometer. Thus, when the outlet water temperature of the hot water stored in the hot water tank is lower than the first target value, until the outlet water temperature of the hot water stored in the hot water tank reaches the first target value, When the pump output of the pump is reduced to the minimum and the outlet water temperature of the hot water stored in the hot water tank reaches the first target value, the outlet water temperature of the hot water stored in the hot water tank is the first target value. When the outlet water temperature of the hot water stored in the hot water tank exceeds the first target value, the pump output of the pump is gradually increased to the maximum so that the pump output is stored in the hot water tank. The pump output of the pump is reduced to the minimum again until the outlet water temperature of the hot water reaches the final target value, and when the outlet water temperature of the hot water stored in the hot water tank reaches the final target value, it is stored in the hot water tank. Hot water outlet water Maintaining the final target value, gradually increasing the pump output of the pump to the maximum again, and when the inlet water temperature of the hot water stored in the hot water tank reaches a desired target value, the hot water tank The heating of the hot water stored inside was finished.

According to the operation method of the heat pump type hot water supply apparatus according to the second aspect of the present invention, the outlet water temperature of the hot water stored in the hot water tank is set higher than the operation method of the heat pump type hot water supply apparatus according to the first aspect described above. The final target value can be reached quickly.
Since the other effect is the same as the operation method of the heat pump type hot water supply apparatus according to the first aspect described above, the description thereof is omitted here.

  According to the heat pump type hot water supply apparatus according to the present invention, the difference between the high pressure and the low pressure of the refrigerant circuit can be made smaller than the conventional one, and the COP can be improved.

It is a systematic diagram of the heat pump type hot water supply apparatus according to the first embodiment of the present invention. It is a chart for demonstrating the operating method of the heat pump type hot-water supply apparatus which concerns on 1st Embodiment of this invention, Comprising: Water temperature and pump output are taken along a vertical axis | shaft, time is taken along a horizontal axis, the relationship between water temperature and time, pump output It is a graph which shows the relationship between water and time, and the relationship between water temperature and pump output. It is a chart for demonstrating the operating method of the heat pump type hot-water supply apparatus which concerns on 2nd Embodiment of this invention, Comprising: Water temperature and pump output are taken along a vertical axis | shaft, time is taken along a horizontal axis, the relationship between water temperature and time, pump output It is a graph which shows the relationship between water and time, and the relationship between water temperature and pump output.

[First Embodiment]
An operation method of the heat pump hot water supply apparatus and the heat pump hot water supply apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a system diagram of the heat pump type hot water supply apparatus according to the present embodiment, and FIG. 2 is a chart for explaining an operation method of the heat pump type hot water supply apparatus according to the present embodiment. It is a chart which takes time on an axis | shaft and shows the relationship between water temperature and time, the relationship between pump output and time, and the relationship between water temperature and pump output.

  As shown in FIG. 1, a heat pump type hot water supply apparatus (heat pump type hot water supply / air conditioner) HP includes a refrigerant system 10 of a heat pump capable of selecting a cooling cycle or a heating cycle by switching the circulation direction of the refrigerant circulating in the refrigerant circuit. And a water system 30A that uses hot water obtained by heating water with a heat pump for hot water supply or heating.

In the refrigerant system 10, the refrigerant sent out by the compressor 11 circulates through a closed circuit refrigerant circuit 14 including the outdoor heat exchanger 12 and the outdoor heat exchanger 13, and repeats the change of the gas-liquid state. The refrigerant circuit 14 according to the present embodiment includes a four-way valve 15 on the discharge side of the compressor 11. By operating the four-way valve 15, the refrigerant circulation direction is switched and reversed, and a clockwise cooling cycle or One of the counterclockwise heating cycles can be selected.
Reference numeral 16 provided in the refrigerant circuit 14 is a cooling electronic expansion valve, reference numeral 17 is a heating electronic expansion valve, and reference numeral 18 is a receiver.
Moreover, the code | symbol 12a in FIG. 1 is an external air fan which adjusts the external air quantity (air flow rate) which passes the outdoor heat exchanger 12. FIG.

In the water system 30 </ b> A, the water sent out by the pump 31 absorbs heat from the refrigerant in an outdoor heat exchanger (hereinafter also referred to as “water heat exchanger”) 13 provided in the refrigerant system 10, and becomes warm water. A hot water circulation channel 32 that circulates and uses a hot water heat source is formed. The warm water circulation channel 32 is provided with a three-way valve 33 as a warm water channel switching valve. Further, in this hot water circulation channel 32, a radiator 36 that functions as a heat exchanger for heating using hot water, and hot water branched from the hot water circulation channel 32 are introduced, and the hot water is stored to store heat. A tank 37A is provided. The radiator 36 in this case is a heat exchanger that heats hot water and indoor air by exchanging heat.
In the water system 30A, hot water stored in the hot water tank 37A flows directly through the sanitary water supply circuit 38A and is supplied with hot water, and hot water supplied from the hydrothermal exchanger 13 in the heating cycle is heated via the heat exchanger 40. It is used for heating hot water stored in the tank 37A.

In addition, when performing defrost operation in the water system 30A configured as described above, when using stored hot water to raise the temperature of hot water supplied to the water heat exchanger 13, a three-way valve (flow path switching valve) 33 is provided. By operating, the hot water flow path is switched as indicated by an arrow W in FIG. As a result, the low-temperature circulating hot water flows through the hot water tank 37A, and when passing through the hot water tank 37A, the hot water is heated through the heat exchanger 40 and heated. To do.
Further, when the stored hot water in the hot water tank 37A does not have sufficient heating capability, the electric heater 39 that is energized as necessary may be energized to be heated and heated.
The electric heater 39 is auxiliary heating means used when the amount of heat stored in the hot water tank 37A is as low as a predetermined value or less. That is, the electric heater 39 is a device that is energized when the stored hot water in the hot water tank 37A is equal to or lower than a predetermined water temperature value and heats the stored hot water to a desired temperature.

In the present embodiment, the outlet water temperature in the vicinity of the outlet of the hot water tank 37A (in the vicinity of the inlet from the hot water tank 37A to the sanitary water supply circuit 38A) is measured (first) from the thermometer 41 and the thermometer 41. And a control device 42 that controls the pump output of the pump 31 based on the measured values that have been sent. And in this embodiment, when heating the warm water stored in the warm water tank 37A via the heat exchanger 40, as shown in FIG. 2, the exit water temperature of the warm water stored in the warm water tank 37A is the first. Is lower than the target value (45 ° C. in the present embodiment), the pump output of the pump 31 is controlled by the control device 42 until the outlet water temperature of the hot water stored in the hot water tank 37A reaches the first target value. When the outlet water temperature of the hot water stored in the hot water tank 37A reaches the first target value after being reduced (minimized) to the minimum (minimum), the outlet water temperature of the hot water stored in the hot water tank 37A is first. The control device 42 gradually increases the pump output of the pump 31 to the maximum so that the outlet water temperature of the hot water stored in the hot water tank 37A is the final target value (this implementation). Form When the temperature of the inlet water of the hot water stored in the hot water tank 37A reaches a desired target value (58 ° C. in this embodiment), the heating of the hot water stored in the hot water tank 37A is completed. It has come to be.
In the vicinity of the inlet of the hot water tank 37A (near the outlet from the sanitary water supply circuit 38A to the hot water tank 37A), an inlet water temperature in the vicinity of the inlet of the hot water tank 37A is measured (second) thermometer (not shown). ) Is provided, and the measured value measured by the thermometer is output to the control device 42. When the transmitted measured value reaches a desired target value (58 ° C. in this embodiment), the control device 42 As a result, the pump 31 is stopped.

Moreover, the broken line in FIG. 2 shows a conventional operation method in which the outlet water temperature of the hot water stored in the hot water tank 37A is suddenly made to reach the final target value without providing the first target value. .
That is, in the operation method (rapid mode: quick mode) indicated by a broken line in FIG. 2, when the hot water stored in the hot water tank 37A is heated through the heat exchanger 40, the hot water stored in the hot water tank 37A is stored. When the outlet water temperature of the pump 31 is lower than the final target value, the pump output of the pump 31 is reduced to the minimum (minimum) by the controller 42 until the outlet water temperature of the hot water stored in the hot water tank 37A reaches the final target value. When the outlet water temperature of the hot water stored in the hot water tank 37A reaches the final target value, the outlet water temperature of the hot water stored in the hot water tank 37A is maintained at the final target value. The pump output of the pump 31 is gradually increased to the maximum by the control device 42, and the inlet water temperature of the hot water stored in the hot water tank 37A is a desired target value (this embodiment). Is reached in 58 ° C.), warm water heating stored in the hot water tank 37A is adapted to be terminated.

According to the operation method of the heat pump hot water supply device HP and the heat pump hot water supply device HP according to the present embodiment, the difference between the high pressure and the low pressure of the refrigerant circuit 14 can be made smaller than the conventional one, and the COP is improved. Can do.
Further, the improvement in COP can reduce the power for driving the compressor 11, and if an electric motor is used to drive the compressor 11, it should be put into the electric motor. Electric energy can be reduced and power consumption can be reduced.

[Second Embodiment]
The operation method of the heat pump type hot water supply apparatus and the heat pump type hot water supply apparatus according to the second embodiment of the present invention will be described with reference to FIG.
FIG. 3 is a chart for explaining the operation method of the heat pump type hot water supply apparatus according to the present embodiment. The vertical axis represents water temperature / pump output, the horizontal axis represents time, the relationship between water temperature and time, pump output and It is a graph which shows the relationship between time and the relationship between water temperature and pump output.

  Now, in this embodiment, when heating the warm water stored in the warm water tank 37A via the heat exchanger 40, as shown in FIG. 3, the outlet water temperature of the warm water stored in the warm water tank 37A is the first. Is lower than the target value (45 ° C. in the present embodiment), the pump output of the pump 31 is controlled by the control device 42 until the outlet water temperature of the hot water stored in the hot water tank 37A reaches the first target value. When the outlet water temperature of the hot water stored in the hot water tank 37A reaches the first target value after being reduced (minimized) to the minimum (minimum), the outlet water temperature of the hot water stored in the hot water tank 37A is first. The control device 42 gradually increases the pump output of the pump 31 to the maximum so that the outlet water temperature of the hot water stored in the hot water tank 37A becomes the first target value. If it exceeds, Until the outlet water temperature of the hot water stored in the water tank 37A reaches the final target value, the pump output of the pump 31 is again reduced (minimized) by the control device 42 and stored in the hot water tank 37A. When the outlet water temperature of the hot water that has been reached reaches the final target value, the control device 42 again maximizes the pump output of the pump 31 so that the outlet water temperature of the hot water stored in the hot water tank 37A maintains the final target value. When the inlet water temperature of the hot water stored in the hot water tank 37A reaches a desired target value (58 ° C. in this embodiment), the hot water stored in the hot water tank 37A is heated. Is to be terminated.

According to the operation method of the heat pump hot water supply device HP and the heat pump hot water supply device HP according to the present embodiment, the final target of the outlet water temperature of the hot water stored in the hot water tank 37A is earlier than that of the first embodiment described above. The value can be reached.
Other functions and effects are the same as those of the above-described first embodiment, and thus description thereof is omitted here.

Note that the present invention is not limited to the above-described embodiment, and can be modified and changed as necessary.
For example, in the above-described embodiment, the first target value is not limited to 45 ° C., and is a temperature (35 ° C. to 50 ° C.) that has no problem (no problem) in actual use such as a shower. Any temperature may be used.
Moreover, in embodiment mentioned above, a final target value is not limited to 60 degreeC, It can select suitably in the range of 35 to 50 degreeC as needed.

  Furthermore, in the first embodiment described above, only the operation mode ((first) economy mode: economy mode I) indicated by the solid line in FIG. 2 is implemented, and in the second embodiment described above, the operation is indicated by the solid line in FIG. Although only the operation mode ((second) economy mode: economy mode II) has been described, the operation mode ((first) economy mode: economy mode I) indicated by the solid line in FIG. The driving method (rapid mode) indicated by a broken line in FIG. 2 may be selectively implemented, or the driving mode ((second) economy mode: economy mode II) indicated by the solid line in FIG. An operation method (rapid mode) indicated by a broken line in FIG. 2 may be selectively implemented.

  Furthermore, an operation mode ((first) economy mode: economy mode I) indicated by a solid line in FIG. 2 and an operation mode ((second) economy mode: economy mode II) indicated by a solid line in FIG. 3 are selected. The operation mode indicated by a solid line in FIG. 2 ((first) economy mode: economy mode I) and the operation mode indicated by a solid line in FIG. 3 ((second) economy) Mode: economy mode II) and an operation method (rapid mode) indicated by a broken line in FIG. 2 may be selectively implemented.

  Furthermore, in the above-described embodiment, the two values of the first target value and the final target value are set. However, the present invention is not limited to this, and the first target value and the final target value are set. A second target value may be set separately between the target value and a second target value and a third target value are set separately between the first target value and the final target value. May be.

  Furthermore, as the pump 31, in addition to the pump driven by the inverter motor employed in the above-described embodiment, a pump driven by an AC motor can be employed.

DESCRIPTION OF SYMBOLS 11 Compressor 12 Outdoor heat exchanger 13 Indoor heat exchanger 14 Refrigerant circuit 30A Water system 31 Pump 32 Hot water circulation flow path 33 Three-way valve (flow path switching valve)
37A Hot water tank 41 Thermometer 42 Control device HP Heat pump hot water supply device

Claims (5)

The refrigerant sent out by the compressor circulates through the closed circuit refrigerant circuit including the outdoor heat exchanger and the indoor heat exchanger, repeats the gas-liquid state change, and switches the circulation direction of the refrigerant circulating in the refrigerant circuit. A heat pump refrigerant system capable of selecting a cooling cycle or a heating cycle, and
The water sent out by the pump absorbs heat from the refrigerant in the indoor heat exchanger to become hot water, and is connected to a hot water circulation passage that circulates the hot water and uses a hot water heat source through a flow switching valve. A heat pump type hot water supply device having a water system comprising:
A thermometer that measures the outlet water temperature in the vicinity of the outlet of the hot water tank, and a controller that controls the pump output of the pump based on the measured value sent from the thermometer;
When heating the hot water stored in the hot water tank, if the outlet water temperature of the hot water stored in the hot water tank is lower than a first target value, the outlet of the hot water stored in the hot water tank The pump output of the pump is reduced to the minimum by the control device until the water temperature reaches the first target value, and when the outlet water temperature of the hot water stored in the hot water tank reaches the first target value, the hot water The hot water stored in the hot water tank is gradually increased to the maximum by the control device so that the outlet water temperature of the hot water stored in the tank maintains the first target value. When the outlet water temperature of the water reaches the final target value and the inlet water temperature of the hot water stored in the hot water tank reaches a desired target value, an economy mode is provided to end the heating of the hot water stored in the hot water tank. The heat pump type hot water supply apparatus characterized by there. The refrigerant sent out by the compressor circulates through the closed circuit refrigerant circuit including the outdoor heat exchanger and the indoor heat exchanger, repeats the gas-liquid state change, and switches the circulation direction of the refrigerant circulating in the refrigerant circuit. A heat pump refrigerant system capable of selecting a cooling cycle or a heating cycle, and
The water sent out by the pump absorbs heat from the refrigerant in the indoor heat exchanger to become hot water, and is connected to a hot water circulation passage that circulates the hot water and uses a hot water heat source through a flow switching valve. A heat pump type hot water supply device having a water system comprising:
A thermometer that measures the outlet water temperature in the vicinity of the outlet of the hot water tank, and a controller that controls the pump output of the pump based on the measured value sent from the thermometer;
When the outlet water temperature of the hot water stored in the hot water tank is lower than the first target value, the control device until the outlet water temperature of the hot water stored in the hot water tank reaches the first target value. When the pump output of the pump is reduced to the minimum and the outlet water temperature of the hot water stored in the hot water tank reaches the first target value, the outlet water temperature of the hot water stored in the hot water tank is set to the first temperature. When the control device causes the pump output of the pump to gradually increase to the maximum so as to maintain the target value, and the outlet water temperature of the hot water stored in the hot water tank exceeds the first target value, Until the outlet water temperature of the hot water stored in the hot water tank reaches the final target value, the pump output of the pump is again reduced to the minimum by the controller, and the outlet water temperature of the hot water stored in the hot water tank is the final target value. The outlet water temperature of the hot water stored in the hot water tank is maintained at the final target value, and the pump output of the pump is gradually increased again to the maximum by the control device, and the hot water tank A heat pump type hot water supply apparatus comprising an economy mode for terminating heating of the hot water stored in the hot water tank when the inlet water temperature of the hot water stored therein reaches a desired target value. Economy mode according to claim 1 and / or claim 2,
When the outlet water temperature of the hot water stored in the hot water tank is lower than the final target value, the controller controls the pump until the outlet water temperature of the hot water stored in the hot water tank reaches the final target value. When the pump output is reduced to the minimum and the outlet water temperature of the hot water stored in the hot water tank reaches the final target value, the outlet water temperature of the hot water stored in the hot water tank is maintained at the final target value. When the pump output of the pump is gradually increased to the maximum by the control device and the inlet water temperature of the hot water stored in the hot water tank reaches a desired target value, the hot water stored in the hot water tank is With quick mode to finish heating,
A heat pump type hot water supply apparatus configured to allow a user to select one of the economy mode according to claim 1 and / or claim 2 and the quick mode. The refrigerant sent out by the compressor circulates through the closed circuit refrigerant circuit including the outdoor heat exchanger and the indoor heat exchanger, repeats the gas-liquid state change, and switches the circulation direction of the refrigerant circulating in the refrigerant circuit. A heat pump refrigerant system capable of selecting a cooling cycle or a heating cycle, and
The water sent out by the pump absorbs heat from the refrigerant in the indoor heat exchanger to become hot water, and is connected to a hot water circulation passage that circulates the hot water and uses a hot water heat source through a flow switching valve. A water system comprising:
Operation method of a heat pump type hot water supply apparatus comprising a thermometer for measuring the outlet water temperature near the outlet of the hot water tank, and a controller for controlling the pump output of the pump based on a measured value sent from the thermometer Because
When heating the hot water stored in the hot water tank, if the outlet water temperature of the hot water stored in the hot water tank is lower than a first target value, the outlet of the hot water stored in the hot water tank The pump output of the pump is reduced to the minimum until the water temperature reaches the first target value, and when the outlet water temperature of the hot water stored in the hot water tank reaches the first target value, it is stored in the hot water tank. The outlet water temperature of the hot water is maintained at the first target value, and the pump output of the pump is gradually increased to the maximum, and the outlet water temperature of the hot water stored in the hot water tank reaches the final target value. When the temperature of the inlet water of the hot water stored in the hot water tank reaches a desired target value, the heating of the hot water stored in the hot water tank is terminated. Method. The refrigerant sent out by the compressor circulates through the closed circuit refrigerant circuit including the outdoor heat exchanger and the indoor heat exchanger, repeats the gas-liquid state change, and switches the circulation direction of the refrigerant circulating in the refrigerant circuit. A heat pump refrigerant system capable of selecting a cooling cycle or a heating cycle, and
The water sent out by the pump absorbs heat from the refrigerant in the indoor heat exchanger to become hot water, and is connected to a hot water circulation passage that circulates the hot water and uses a hot water heat source through a flow switching valve. A water system comprising:
Operation method of a heat pump type hot water supply apparatus comprising a thermometer for measuring the outlet water temperature near the outlet of the hot water tank, and a controller for controlling the pump output of the pump based on a measured value sent from the thermometer Because
When the outlet water temperature of the hot water stored in the hot water tank is lower than the first target value, the outlet water temperature of the hot water stored in the hot water tank reaches the first target value. When the pump output is reduced to the minimum and the outlet water temperature of the hot water stored in the hot water tank reaches the first target value, the outlet water temperature of the hot water stored in the hot water tank maintains the first target value. In this manner, when the pump output of the pump is gradually increased to the maximum and the outlet water temperature of the hot water stored in the hot water tank exceeds the first target value, the outlet of the hot water stored in the hot water tank The pump output of the pump is reduced to the minimum again until the water temperature reaches the final target value, and when the outlet water temperature of the hot water stored in the hot water tank reaches the final target value, the hot water stored in the hot water tank is stored. Exit water temperature is final Maintain the target value, gradually increase the pump output of the pump again to the maximum, and when the inlet water temperature of the hot water stored in the hot water tank reaches the desired target value, enter the hot water tank. An operation method of a heat pump type hot water supply apparatus, wherein heating of stored hot water is finished.

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