JP5498357B2 - Heat pump hot water storage water heater - Google Patents

Description

  This invention is a heat pump type hot water storage system in which the user can set the amount of hot water to be used per day, and when the remaining hot water amount falls below the minimum hot water storage amount, it can be selected whether or not to boil in the daytime. Water heater.

  Conventionally, in this kind of thing, let's boil as much as possible only by boiling in late night hours as well as in the late night hours, as well as in the entrusted mode that also raises in the late night hours The user has to select and use one mode suitable for his / her life style from these two modes. (For example, refer to Patent Document 1.)

JP 2008-138983 A

  By the way, in this conventional system, when the Omakase mode is selected, in addition to boiling at midnight, additional heating is performed whenever hot water runs out. If the saving mode is selected, it is only heated in the late night hours, so the electricity bill is cheap and wasted. However, there is always a danger of running out of hot water, and each mode has advantages and disadvantages.

  The present invention focuses on this point and solves the above-mentioned problems. In particular, in claim 1, the structure is composed of a hot water storage tank for storing hot water, a heat pump heating means for heating the hot water in the hot water storage tank, and a hot water storage tank. A plurality of hot water storage temperature sensors for detecting hot water temperature in the height direction of the inside, a hot water supply control unit for controlling hot water in the hot water storage tank to be boiled at midnight, and setting of a boiling operation in the hot water control unit. When the remote controller has a remote controller having a display unit that enables various settings, the hot water volume setting means for setting the hot water volume to the remote controller, and the remaining hot water is less than a preset minimum hot water volume And additional boiling setting means to set whether or not to boil in the day, and if you choose to perform additional boiling, boil less than the set amount of hot water to use in the midnight hours If no boiling-up occurs during the specified period, an indication to reset the hot water volume setting to a smaller value is displayed on the remote control display, and if no additional boiling is selected, the midnight While boiling up to the amount of hot water set for the amount of boiling in the time zone, when the remaining hot water falls below the minimum hot water storage amount, the remote control display will indicate that the reheating switch for forcibly boosting is pressed. It is something to make.

  Further, in claim 2, when the selection is made not to perform additional boiling, the difference between the set amount of hot water used and the actual amount used shifts by a predetermined amount or more, and if this continues for a predetermined period, An indication to reset the setting so as to eliminate this difference is displayed on the display unit of the remote controller.

  As described above, according to claim 1 of the present invention, the user himself / herself can set the amount of hot water to be used per day and whether or not to have additional boiling in the daytime with the remote controller, so that the user himself can use it according to his / her own lifestyle. The amount of hot water can be set, it is extremely convenient and easy to use, and the user can decide whether or not to boil in the day without having to worry about running out of hot water even though the electricity fee is bulky. If you choose to perform additional boiling, you can boil the amount of boiling at midnight slightly less than the set amount. It is intended to increase the efficiency by reducing the amount of hot water used, and when the boiling of the day is not carried out over a predetermined period, a message is displayed to reset the hot water amount to a lower setting. Because The user can change the setting to a small amount without hesitation, and it is extremely convenient.In addition, it is selected that no additional boiling is performed, and when the remaining hot water is less than the minimum hot water storage amount, the display is made to press the boiling increase switch. When you want hot water, you can press the switch to reheat, you can respond calmly without having to hurry even if sudden hot water runs out, and you can also know that the hot water has run out with this display.

  Further, according to claim 2, when it is selected that the additional boiling is not performed, the difference between the set amount of hot water used and the actual amount used is shifted by a predetermined amount or more, and if this continues for a predetermined period, Since the display that resets the setting so that this difference disappears is done, you can know whether the amount of hot water you set is appropriate, even if it is wrong, you can accurately correct the actual amount of hot water used, and use it extremely efficiently It is possible.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the heat pump type hot water storage hot-water supply machine which shows one Embodiment of this invention. The block diagram of the principal part electric circuit. The flowchart of the principal part.

A heat pump hot water storage hot water supply apparatus according to an embodiment of the present invention will be described with reference to the drawings.
1 is a stainless steel hot water storage tank for storing hot water, 2 is a water supply pipe for supplying city water to the bottom of the hot water storage tank 1, 3 is a hot water discharge pipe for discharging hot water from the top of the hot water storage tank 1, 4 is a water supply bypass branched from the water supply pipe 2 A hot water mixing valve that mixes hot water from the hot water discharge pipe 3 and water from the hot water supply bypass pipe 4 so as to reach a hot water supply set temperature, 6 is a hot water supply pipe through which hot water mixed by the hot water mixing valve 5 flows, 7 is a hot-water tap for supplying hot water from the hot-water supply pipe 6, 8 is a hot-water supply temperature sensor for detecting the hot-water supply temperature provided in the middle of the hot-water supply pipe 6, and 9 is a hot-water supply flow sensor for detecting the amount of hot water provided in the middle of the hot-water supply pipe 6. A pressure reducing valve 10 is provided in the water supply pipe 2 to reduce the supply pressure of city water to a constant pressure, and 11 is an overpressure relief valve for releasing the overpressure in the hot water storage tank 1.

  Reference numeral 12 denotes a bathtub, 13 is a bath heat exchanger provided in the upper part of the hot water storage tank 1 for heating the bathtub water as an external fluid by the heat of the hot water in the hot water storage tank 1, and 14 is a bathtub 12 and a bath heat exchanger. 13 is connected to the bath circulation circuit 14 so that the bath water can circulate, 15 is provided in the bath circulation circuit 14 and circulates the bath water, and 16 is branched from the hot water supply pipe 6 and connected to the bath circulation circuit 14. A hot water filling pipe, 17 is provided in the middle of the hot water filling pipe 16 and opens and closes the hot water filling pipe 16, 18 is provided in the middle of the bath circulation circuit 14, and the temperature of the bath water flowing from the bathtub 12 to the bath heat exchanger 13 A bath temperature sensor 19 for detecting the water level, 19 is a water level sensor for detecting the water level in the bathtub 12 by pressure.

  20 is a heat pump type heating means for heating the hot water in the hot water storage tank 1, a compressor 21 for compressing the refrigerant, a refrigerant water heat exchanger 22 for exchanging heat between the refrigerant and water, and a pressure reduction of the refrigerant. A decompressor 23 for evaporating the liquid refrigerant, and the refrigerant 21 that has absorbed heat by the evaporator 24 is compressed by the compressor 21 to heat the water through the refrigerant water heat exchanger 22. . The evaporator 24 is provided with a blower 25, and an outside air temperature sensor 26 for detecting the outside air temperature is provided upstream of the evaporator 24 in the ventilation path. A carbon dioxide refrigerant is used as the refrigerant in the heat pump type heating means 20, and the water can be heated to a high temperature of 90 ° C. when the high pressure side becomes a supercritical state.

  A heating circulation circuit 27 connects the lower part of the hot water storage tank 1, the water side of the refrigerant water heat exchanger 22, and the upper part of the hot water storage tank 1 so that hot water can circulate, and 28 is a heating circulation pump provided in the middle of the heating circulation circuit 27. , 29 is an incoming water temperature sensor for detecting the temperature of water flowing into the refrigerant water heat exchanger 22, and 30 is a boiling temperature sensor for detecting the temperature of hot water heated by the refrigerant water heat exchanger 22.

  A plurality of hot water storage temperature sensors 31 provided in the vertical direction of the side surface of the hot water storage tank 1 are used to detect the temperature of the hot water in the hot water storage tank 1 and are called 31a, 31b, 31c, 31d, 31e from the top. . The hot water storage temperature sensors 31a to 31e also serve as sensors for detecting the hot water storage amount, and the uppermost hot water storage temperature sensor 31a also detects the minimum hot water storage amount.

  Reference numeral 32 denotes a remote controller provided in the kitchen, etc., for various information related to the water heater (hot water set temperature, bath set temperature, operating condition of the water heater, etc.), the amount of hot water used in the day, whether there is additional boiling in the day, and the amount of hot water used. A display 33 for displaying the difference between the actual use amount, a hot water supply set temperature, a bath set temperature, a setting switch 34 for setting and operating the bath set hot water amount, and a used hot water amount setting means 35 for setting the daily use hot water amount. And an additional boiling setting means 36 for setting whether or not additional boiling is performed in the daytime, a reheating switch 37 for forcibly boiling the hot water in the hot water storage tank 1 to the heating means 20, and the display unit 33. The display changeover switch 38 that enlarges and displays the display of the temperature and the amount of hot water in order to change the setting, and when changing the setting of the temperature and the amount of hot water enlarged by the display changeover switch 38, press once to confirm and confirm again And a change determination switch 39 to confirm the.

  Reference numeral 40 denotes a hot water supply temperature sensor 8, a hot water supply flow rate sensor 9, a bath temperature sensor 18, a water level sensor 19, an outside air temperature sensor 26, an incoming water temperature sensor 29, a boiling temperature sensor 30, and detection values of hot water storage temperature sensors 31a to 31e. The operation of the bath circulation pump 15, the hot water filling valve 17, the compressor 21, the decompressor 23, the blower 25, and the heating circulation pump 28 is controlled, and connected to the remote controller 32 so as to be communicable with the set value of the remote controller 32. The hot water supply control unit 40 controls the water heater, and the hot water supply control unit 40 stores a program for controlling the operation of the water heater in advance, and has a calculation, comparison, storage function, and clock function. Is.

  The hot water supply control unit 40 uses the amount of hot water stored in the hot water storage tank 1 during the heating operation at midnight so that the set amount of hot water used per day set by the user himself / herself on the remote control 32 is used. The hot water storage temperature sensors 31a to 31e detect that the amount of hot water has been reached and end boiling, and the hot water supply control unit 40 further determines that the hot water storage temperature sensor 31a is below the minimum hot water storage amount depending on whether or not additional boiling is performed in the daytime. Is detected, when additional boiling is selected, additional boiling is started, and when this additional boiling during the day has not occurred for a predetermined period of 7 days, “use” is displayed. If you select "Do not perform additional boiling", select "Reset the hot water amount to a small amount" and do not perform additional boiling in the day, but forcibly increase boiling on the display unit 33 and start operation. If you select “Do not perform additional boiling”, the difference between the actual amount used and the set amount of hot water detected by the hot water flow sensor 9 can be positive or negative. When the fixed amount is shifted by 20L or more and it continues for a predetermined period of time here for 7 days, it is displayed that the setting of the amount of hot water used is reset so as to eliminate this difference, that is, the setting of the amount of hot water used is not changed. Please set again ".

Next, the operation of this embodiment will be described based on the operation explanatory diagram of FIG.
First, when the total capacity of the hot water storage tank 1 is 370L, the amount of hot water used is displayed on the display unit 33 of the remote controller 32 by pressing the display changeover switch 38, and the setting will be displayed by the change confirmation switch 39. 35, it is determined by setting the daily hot water amount 320L desired by the user and pressing the change confirmation switch 39 (step 41). Subsequently, the additional boiling setting means 36 determines whether or not there is additional boiling in the daytime. It is step 42 to select.

  In step 43, the heating means 20 and the heating circulation pump 28 are driven in the late-night time period, the hot water in the hot water storage tank 1 is heated by the refrigerant water heat exchanger 22, and hot water ( (About 80 ° C) is returned from the top of the hot water storage tank 1 to store hot water, and the hot water storage temperature of the hot water storage tank 1 has reached 300L, which is less than 320L set by the hot water storage temperature sensors 31a to 31e. It is step 44 to detect and end boiling.

  In step 45, hot water supply proceeds, and the hot water storage temperature sensors 31a to 31e detect the amount of hot water stored in the hot water storage tank 1 to detect the amount below the minimum hot water storage amount, and in step 46, an additional boiling operation is performed in the daytime. In the case where there is remaining hot water exceeding the minimum hot water storage amount, the process proceeds to step 48 and the hot water supply control unit 40 memorizes that this additional boiling was not performed in the daytime, and this additional boiling was not performed for a predetermined period of 7 days here. Sometimes, in step 49, the display unit 33 of the remote control 32 displays “Please reset the amount of hot water used” to prompt the user to set the amount of hot water used to a lower level. By refraining, it is economical and energy saving can be improved.

  Next, in step 50, if no additional boiling is performed in the daytime, first, in step 51, a predetermined amount is set which is displayed when the difference between the set hot water amount and the actual usage amount is greater than or equal to the predetermined amount. In this case, 20L is set and inputted, and in step 52, the heating means 20 is driven in the midnight time zone so that the hot water storage amount in the hot water storage tank 1 is set to 320L. The hot water supply advances, and the hot water storage temperature sensors 31a to 31e detect the amount of hot water stored in the hot water storage tank 1 at step 53, detect the amount below the minimum hot water storage amount, and at step 54, the display 33 of the remote control 32 is displayed. “Please press the reheat switch” is displayed, and it will run out of water soon and will not automatically reheat, so those who need hot water will continue to press the reheat switch 37. It is intended to agree arouse.

  In the subsequent step 55, the hot water supply flow rate sensor 9 counts the total hot water supply amount = actual usage amount on the day and the set hot water usage amount 320L by the hot water supply control unit 40, and the difference is more than minus 20L that the set hot water usage amount is insufficient. Then, it is determined that this has continued for a predetermined period of time, 7 days here, and in step 56, “Please reset the amount of hot water used so that there is no difference” is displayed on the display unit 33 of the remote controller 32. .

  On the other hand, in step 57, the hot water storage temperature sensors 31a to 31e detect that there is a remaining hot water in the hot water storage tank 1 that exceeds the minimum hot water storage amount. = Actual use amount is compared with the set hot water amount 320L by the hot water supply control unit 40, and the difference is that the set hot water amount is large plus 20L or more, and it is determined that this has continued for a predetermined period of 7 days here, 59, the display unit 33 of the remote control 32 displays "Please reset the amount of hot water used so that there is no difference".

  In this way, the set hot water volume can be corrected so that this difference is eliminated by calculating the difference between the set hot water volume and the actual hot water volume, so that the hot water can be used up without any shortage or excess. It is possible to perform efficient hot water supply without waste.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 20 Heating means 32 Remote control 33 Display part 35 Hot water amount setting means 36 Additional boiling setting means

Claims (2)

  A hot water storage tank for storing hot water, a heat pump type heating means for heating the hot water in the hot water storage tank, a plurality of hot water temperature sensors for detecting the hot water temperature in the height direction in the hot water storage tank, and a hot water storage tank at midnight A hot water supply control unit for controlling the hot water in the water to be boiled, and a remote controller having a display unit that enables setting of boiling operation and various settings in the hot water supply control unit. Hot water amount setting means for setting the amount of hot water used, and additional boiling setting means for setting whether or not to boil in the day when the remaining hot water falls below a preset minimum hot water storage amount If you choose to do it, boil it less than the amount of hot water you set in the midnight hours, and if no boiling occurs during the specified period, set the amount of hot water used to a lower setting. Is displayed on the display of the remote control, and when no additional boiling is selected, the boiling water is heated up to the amount of hot water set in the midnight hours and the remaining hot water is the lowest A heat pump type hot water storage hot water heater characterized by causing the display part of the remote control to display a message indicating that the reheating switch is pressed to force the reheating when the amount is below the limit.   In the case of selecting not to perform additional boiling, the difference between the set amount of hot water used and the actual amount used deviates by a predetermined amount or more, and if this continues for a predetermined period, the difference in the setting of the amount of hot water used is eliminated. The heat pump type hot water storage and hot water supply device according to claim 1, wherein a display indicating that the setting is reset is displayed on a display unit of the remote controller.

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