JP3842124B2 - Heat pump water heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat pump type water heater.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, some heat pump hot water heaters include a hot water storage unit, a heat pump unit, and a remote controller. That is, the hot water storage unit includes a hot water storage tank, and hot water heated by the heat pump unit is stored in the hot water storage tank. In addition, since the current electricity rate system is set at a lower price than the daytime electricity rate unit, this operation is performed in the low-night time zone (for example, the time zone from 23:00 to 7:00), which is low. In many cases, the running cost is reduced. That is, hot water used in a day is stored in a hot water storage tank at midnight.
[0003]
However, if the daily usage is large, the required amount of hot water may not be boiled during boiling operation at midnight. In such a case, the shortage was replenished by performing additional operation (chase operation) in the daytime. On the other hand, if the daily usage is low, the boiling operation is started by shifting the specified time from the start time of the midnight time without using the entire midnight time zone, and the boiling time is raised at the end time of the midnight time zone. I was able to finish driving. And these operation | movement (control) was controlled by the control part of this heat pump type water heater, and was performed automatically.
[0004]
[Problems to be solved by the invention]
By the way, conventionally, confirmation of electric energy was able to be performed with the wattmeter in the meter box installed outdoors. However, the amount of power in this case is the total amount of power used in this home, and it was not possible to confirm the amount of power of only the heat pump water heater. Therefore, it is impossible to confirm separately the amount of electric power for boiling operation and the amount of power for reheating operation. Therefore, in recent years, it has been recognized that it is preferable to perform energy-saving operation from the viewpoint of protecting the global environment, but even if wasteful operation (for example, operation to boil excess hot water in the daytime operation) is performed, It was not possible to recognize this, and the operation was continued as it was. As a result, there are cases where the running cost is high and energy saving cannot be achieved.
[0005]
The present invention has been made to solve the above-mentioned conventional drawbacks, and an object thereof is to provide a heat pump type water heater that can enhance the user's energy saving awareness and is therefore excellent in protecting the global environment. is there.
[0006]
[Means for Solving the Problems]
Accordingly, the heat pump type hot water heater of claim 1 is a heat pump type hot water heater provided with a hot water storage unit 1, a heat pump unit 2, and a remote controller R. The remote controller R is divided into a day portion and a midnight portion. And the cumulative power consumption obtained by integrating the power consumption for one day over a plurality of days is displayed together with the cumulative number of days.
[0007]
In the heat pump type water heater of claim 1, since the power consumption for midnight (midnight) and the power consumption for daytime are displayed on the remote control R, the power consumption during midnight and the daytime power consumption are displayed. The user can easily confirm (understand) the power consumption. As a result, the amount of power consumption per day can be confirmed separately for midnight and daytime. Furthermore, since the accumulated power consumption for multiple days is displayed for the night and daytime and the number of days accumulated, for example, the cumulative power consumption for one month is divided into the midnight hours and the daytime. Can be easily confirmed. In other words, the user can check the power consumption over one or more days by dividing it into daytime and midnight, so that the user can effectively use midnight when the power rate is low, and the daytime when the power rate is high. Make efforts to reduce driving.
[0008]
The heat pump type water heater of claim 2 has a reset function for resetting the accumulated days and the accumulated power consumption to zero, and a function for returning the accumulated days to zero when the accumulated days exceed the number of digits that can be displayed, It has a function of returning the accumulated power consumption to zero when the accumulated power consumption exceeds the number of digits that can be displayed.
[0009]
In the heat pump type water heater according to the second aspect of the invention, since the accumulated days and the accumulated power consumption display can be returned to the initial state by the reset function, the accumulated power consumption can be accumulated by operating the reset function. Can be started from the reset date. That is, the integration days and the accumulated power consumption display can be returned to zero on the date desired by the user, and the accumulation start date of the accumulated power consumption can be freely set. In addition, if the cumulative number of days and cumulative power consumption exceed the number of digits that can be displayed, the user automatically becomes zero without operating the reset function, so excessive data volume can be suppressed and the control configuration is simplified. Can be
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, specific embodiments of the heat pump type water heater of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a simplified diagram of a heat pump type hot water heater, which includes a hot water storage unit 1 and a heat pump unit (heat source unit) 2, and heats the water (hot water) of the hot water storage unit 1 with the heat pump unit 2. To boil. The hot water storage unit 1 includes a hot water storage tank (not shown), and a circulation path 3 is connected to the hot water storage tank. The circulation path 3 is provided with a heat exchange path 4 and a water circulation pump (not shown).
[0011]
The heat pump unit 2 includes a refrigerant circuit, and this refrigerant circuit is configured by connecting a compressor, a water heat exchanger, an electric expansion valve (decompression mechanism), and an air heat exchanger (evaporator) in this order. Is done. Then, by driving (actuating) the water circulation pump in the circulation path 3 while driving the compressor, unheated water below the hot water storage tank flows out to the circulation path 3, which is the heat exchange path 4 of the circulation path 3. Circulate. At that time, the unheated water is heated (boiling) by the heat exchange path 4 heated by the water heat exchanger and returned to the upper part of the hot water storage tank. By continuously performing such an operation, hot hot water can be stored in the hot water storage tank. The hot water stored in the hot water storage tank is supplied to a kitchen, a bathroom, etc. (not shown).
[0012]
In the operation of storing hot water in the hot water storage tank, in consideration of the current power rate system in recent years, the power rate is set at a lower price than in the daytime (for example, 8 hours between 23:00 and 7:00) There is a boiling operation of the hot water storage tank and an additional operation during the daytime outside the midnight hours when the required amount of hot water for the day is insufficient for this boiling operation, and these operations are performed to secure the required amount of hot water for the day. Is. In other words, if the amount of boiling operation that is used per day is terminated only during the midnight hours as much as possible, and there is a shortage of operation during this midnight hours, an additional daytime with a high power charge is added. Driving (reaping driving) is performed.
[0013]
By the way, remote controllers R and R are provided in the kitchen and bathroom, respectively. As shown in FIG. 2, the remote controller R is provided with a plurality of operation setting buttons 5..., And when each operation button 5. The hot water storage unit 1 and the heat pump unit 2 are driven so that the instructed operation is performed by a signal from the control means. In addition, this control means can be comprised using a microcomputer, for example.
[0014]
That is, the remote control (kitchen-side remote control) R is provided with a display screen 6 composed of a liquid crystal screen or the like. The display screen 6 includes a temperature display section 7 for displaying the hot water supply temperature and a remaining amount for displaying the remaining hot water amount in the hot water storage tank. A hot water amount display unit 8, a hot water level display unit 9 for displaying a set hot water amount (a hot water level for determining the boiling amount of the hot water storage tank), a time display unit 10 and the like are provided. In addition, as the operation setting button 5, a bath automatic button 5a, a menu button 5b, a confirmation button 5c, a descending button 5d, an ascending button 5e, and the like are provided.
[0015]
The function of the main operation setting button 5 in the remote controller R will be described. When the automatic bath button 5a is pressed, a bath-filling operation for supplying hot water to the bathtub is automatically performed. Although not shown, various operation setting buttons 5 are exposed when the cover of the remote control R is open, and if this operation setting button 5 is pressed, the hot water supply temperature, the set amount of hot water, the time, etc. can be changed. it can. In this case, the remaining hot water amount display section 8 shows a simplified illustration of the hot water storage tank so that the remaining hot water amount can be grasped from this figure. Furthermore, the set amount of hot water (the amount of hot water stored in the hot water storage tank) is divided into four stages: “continuous”, “more”, “standard”, and “less”. The hot water discharged from the hot water storage tank is high temperature, and low temperature water is mixed with this high temperature hot water so as to reach an appropriate temperature and supplied to a shower or the like. For this reason, the hot water supply temperature is set at a set temperature (for example, 40 ° C. shown in the temperature display section 7) by adjusting the mixing ratio of hot water and low temperature water with a mixing valve or the like. Hot water is supplied from a shower. Since the remote controller R on the bathroom side has the same function as the remote controller R on the kitchen side, the description thereof is omitted.
[0016]
The remote controller (kitchen-side remote controller) R displays the daily power consumption divided into daytime and late night, and cumulative power consumption obtained by integrating the daily power consumption over a plurality of days. The amount can be displayed along with the cumulative number of days. Here, the midnight portion is an operation amount in the midnight time zone (for example, from 23:00 to 7:00 am on the next day), and the daytime portion is an operation portion in the daytime (outside the midnight time zone). Therefore, as shown in FIG. 4, the sum of the midnight time zone of A-1 and the daytime of B-1 and the sum of the midnight time zone of A-2 and the daytime of B-2 are called one day. .
[0017]
In this case, in order to display the power consumption, first, the display screen 6 is changed to the initial screen 15a showing the initial state of FIG. 3 by pressing the menu button 5b. The initial screen 15a has a display unit 16a on which the amount of power (power consumption) is displayed. By pressing the descent button 5d from this state, the next second screen 15b is displayed, and the daytime power consumption (power consumption) of the previous day is displayed on the display portion 16b. Next, when the descent button 5d is pressed, the third screen 15c is displayed, and the power amount (power consumption amount) of the previous night is displayed on the display unit 16c. In this case, when the midnight time zone of A-1 and the daytime of B-1 shown in FIG. 4 are today, the midnight time zone of A-2 is the midnight time zone of the previous day (previous), and B-2 The daytime is the daytime of the previous day (previous).
[0018]
Next, by pressing the descent button 5d from the state of the third screen 15c, the fourth screen 15d is displayed, and the accumulated power consumption during the daytime until the previous day is displayed on the display unit 16d, and the fourth screen 15d. The accumulated days are displayed on the accumulated days display portion 17d. Further, by pressing the descent button 5d from the state of the fourth screen 15d, the fifth screen 15e is displayed, and the accumulated power consumption of midnight until the previous day is displayed on the display unit 16e, and the accumulated number of days display unit The accumulated number of days is displayed at 17e. In addition, the accumulation start date of the accumulated power consumption is a date reset by a reset function or the like, as will be described later.
[0019]
As described above, if the descent button 5d is sequentially pressed from the initial screen 15a, the initial screen 15a → the second screen 15b → the third screen 15c → the fourth screen 15d → the fifth screen 15e → the sixth screen 15f changes. On the contrary, if the ascending button 5e is pressed sequentially from the sixth screen 15f, the screen changes from the sixth screen 15f → the fifth screen 15e → the fourth screen 15d → the third screen 15c → the second screen 15b. If the up button 5e is pressed from the initial screen 15a, the screen returns to the sixth screen 15f. If the down button 5d is pressed from the sixth screen 15f, the screen returns to the second screen 15b and the up / down button e is pressed from the second screen 15b. Returns to the normal mode.
[0020]
By the way, the accumulated days and accumulated power consumption displayed on the fourth screen 15d and the fifth screen 15e can be reset to zero by the reset function. That is, by pressing the descent button 5d from the state of the fifth screen 15e, the sixth screen (reset screen) 15f is obtained, and the accumulated days of the accumulated days display portion 17f and the accumulated power consumption of the display portion 16f blink. . If the confirmation button 5c is pressed on the reset screen 15f, the accumulated days and accumulated power consumption for midnight and daytime are reset to zero, and the display screen 15 displays the hot water temperature and the like. Return to normal mode.
[0021]
Furthermore, in this remote control R, when the accumulated days exceed the number of digits that can be displayed by the function of resetting the accumulated days to zero, the function is reset to zero and the accumulated power consumption is reset to zero. It is set to return to zero when the amount exceeds the number of digits that can be displayed. That is, if the cumulative number of days exceeds 99 days, for example, the cumulative number of days is set to zero, and if the cumulative power consumption exceeds 999 kWh, for example, the cumulative power consumption is set to zero. The function for returning the accumulated number of days to zero and the function for returning the accumulated power consumption to zero may be functions that are linked or functions that are not linked. Here, interlocking means that, for example, when the accumulated number of days exceeds the number of digits that can be displayed and this accumulated number of days is reset to zero, the accumulated power consumption does not exceed the number of digits that can be displayed. When the amount is reset to zero, or conversely, when the cumulative power consumption exceeds the number of digits that can be displayed and this cumulative power consumption is reset to zero, the accumulated number of days does not exceed the number of digits that can be displayed. To return the accumulated days to zero.
[0022]
As described above, in the above apparatus, the user can check the power consumption over one day or a plurality of days by dividing it into daytime and midnight. That is, the user can grasp the amount of power consumed in the daytime and the amount of power consumed in the middle of the night, and effectively use the operation at midnight when the power rate is low to reduce the daytime operation where the power rate is high. Will do. For this reason, the user's awareness of energy saving increases, and this heat pump type hot water heater can constitute a hot water heater excellent in global environmental protection.
[0023]
In addition, the accumulated number of days and the accumulated power consumption can be reset to zero on the date desired by the user by the reset function, and the accumulation start date and the accumulation end date of the accumulated power consumption can be freely set. . In other words, according to the calendar of the year, the cumulative power consumption accumulation start date shall be the beginning of the month, or the cumulative power consumption accumulation end date shall be the end of the month or the end of the month two to three months later. It is possible to grasp the accumulated power consumption of the accumulated number of days from the date desired by the user.
[0024]
Further, if the cumulative number of days exceeds a predetermined number of digits, the cumulative number of days is reset, and if the cumulative power consumption exceeds a predetermined number of digits, the cumulative power consumption is reset. Therefore, since the display of the accumulated days and the accumulated power consumption does not exceed the predetermined number of digits, the area of the display screen for displaying them can be reduced, and the calculation process can be simplified by preventing an excessive amount of data. Can be achieved. Thereby, the compactness of the remote controller R can be achieved.
[0025]
Although specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, in the above embodiment, midnight means from 23:00 to 7:00 am on the next day, and the other time zone is set to daytime, which corresponds to the current power rate system. Yes, if this system is changed, the time zone between midnight and daytime may be changed according to this change. When displaying the daytime power consumption of the previous day, the power consumption of midnight the previous day, the cumulative power consumption of the daytime, and the cumulative power consumption of midnight, in the above embodiment, by pressing the operation setting button 5 Although these are displayed sequentially, all of these data are displayed at once even if they are automatically displayed every predetermined time (for example, 2 to 3 seconds) without pressing the operation setting button 5. Even if it is a thing, it may display two or three kinds at a time.
[0026]
【The invention's effect】
According to the heat pump type water heater of claim 1, the user can confirm the power consumption over one day or a plurality of days by dividing it into daytime and midnight, thereby effectively using midnight when the power rate is low. As a result, efforts will be made to reduce daytime driving with high power charges. That is, the user comes to endeavor to operate the equipment without waste, can raise the user's energy saving awareness, and can provide a heat pump type water heater excellent in global environmental protection. In addition, even though energy-saving operation is set to increase the power consumption at midnight, if there is a lot of power consumption in the daytime or abnormally high power consumption, this heat pump water heater It can be determined that the operation is not performed normally. Thereby, it can improve so that normal driving | operation control may be performed, the driving | running in an abnormal state can be avoided, and the lifetime improvement of a heat pump type hot water heater can be achieved.
[0027]
According to the heat pump type water heater of claim 2, it can be returned to zero on the date desired by the user, and the integration start date of the accumulated power consumption can be freely set. Thereby, it is possible to grasp the accumulated power consumption of the accumulated days from the date desired by the user. In addition, if the cumulative number of days and cumulative power consumption exceed the number of digits that can be displayed, the user automatically becomes zero without operating the reset function. Can be
[Brief description of the drawings]
FIG. 1 is a simplified diagram showing an embodiment of a heat pump type water heater according to the present invention.
FIG. 2 is an explanatory diagram of a remote controller of the heat pump type water heater.
FIG. 3 is an explanatory diagram of a display screen of a remote controller of the heat pump type water heater.
FIG. 4 is an explanatory diagram of daytime and midnight in the heat pump type water heater.
[Explanation of symbols]
1 Hot water storage unit 2 Heat pump unit R Remote control

Claims (2)

In a heat pump water heater provided with a hot water storage unit (1), a heat pump unit (2), and a remote control (R), the remote control (R) is divided into a daytime portion and a midnight portion, and the power consumption per day. A heat pump type hot water heater characterized by displaying the amount and displaying the accumulated power consumption amount obtained by integrating the power consumption amount for one day over a plurality of days together with the cumulative number of days. A reset function for resetting the accumulated days and the accumulated power consumption to zero, a function for resetting the accumulated days to zero when the accumulated days exceed the number of displayable digits, and a digit for displaying the accumulated power consumption The heat pump type hot water heater according to claim 1, further comprising a function of returning the accumulated power consumption to zero when the number is exceeded.

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