JP2015137802A - Hot water storage water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which, after setting a full mode so as to correspond to temporary increase in a hot water supply amount, when the mode is not returned to an original boiling mode, an unnecessary full state continues and it is uneconomical.SOLUTION: A hot water storage type water heater 1 includes: a hot water storage tank 3 for storing hot water; a stored hot water temperature sensor 14 for detecting temperature of the hot water in the hot water storage tank 3; heating means 4 for heating the hot water in the hot water storage tank 3; boiling control means (49) for boiling the water in the hot water storage tank 3 in a late-night time zone by the heating means 4; and a remote controller 5 for displaying a hot water storage state in the hot water storage tank 3 and preset temperature, and capable of changing the preset temperature. The remote controller 5 includes just-for-today full setting means (46, 51) for setting a full mode only for the day in which the heating means 4 repeatedly performs full-tank additional boiling so as to maintain a state where the hot water storage tank 3 is filled with hot water, from the setting operation time to predetermined time, by a predetermined setting operation.

Description

  The present invention relates to a hot water storage type hot water supply apparatus that boils water in a hot water storage tank at midnight.

  Conventionally, in this type of hot water storage type hot water supply device, the water in the hot water storage tank is boiled up to the full tank by the heat pump type heating means at midnight, and the amount of hot water stored is reduced even in the daytime time zone. There was one that had a full tank boiling mode that did not run out of hot water by driving the means to fill up.

Japanese Patent Laid-Open No. 2004-233003

  However, in this conventional system, once the full tank mode is set, the full tank mode is continued. Therefore, after the full tank mode is set in order to cope with a temporary increase in the amount of hot water supplied by visitors, etc. Forgetting to return to the normal boiling mode, an unnecessary full tank state was continued, which was uneconomical.

  In order to solve the above problems, the present invention provides a hot water storage tank for storing hot water, a hot water storage temperature sensor for detecting the temperature of the hot water in the hot water storage tank, heating means for heating the hot water in the hot water storage tank, and the hot water storage tank. A hot water supply pipe for supplying water, a hot water discharge pipe for discharging from the hot water storage tank, a hot water mixing valve for mixing water branched from the water supply pipe and hot water from the hot water discharge pipe at a set temperature, and from the hot water supply mixing valve A hot water supply pipe for supplying hot water to the outside, a boiling control means for boiling water in the hot water storage tank by the heating means during midnight, and a hot water storage state and a set temperature in the hot water storage tank and displaying the set temperature In a hot water storage hot water supply device equipped with a remote control capable of changing the operation, the hot water is maintained in a full state in the hot water storage tank by a predetermined setting operation from the setting operation time to a predetermined time. Today only full setting means for setting only full mode today said heating means performs repeatedly increased boiling full and shall be provided in the remote control so that.

  Here, it is desirable that the predetermined setting operation be performed once by providing an independent operation switch only for setting the full tank mode only today. As a configuration that also serves as a switch, a setting operation such as a plurality of operations such as 2 to 4 times or a long press may be employed.

  In the state where the full tank mode is set only for today, the full tank mode is canceled only for today by operating a specific switch of the remote controller.

  Here, as the specific switch, a switch used when the full tank mode is set only today or a switch related to the heating increase operation is preferable.

  According to the present invention, it is possible to set a mode in which a full tank is easily maintained by remote control operation, and it is possible to cope with a sudden increase in the amount of hot water used without running out of hot water, and automatically at a predetermined time. The mode for maintaining the full tank is canceled, and a situation where an unnecessary full tank state continues due to forgetting to cancel the setting can be avoided, and an economical hot water storage hot water supply apparatus can be provided.

Schematic configuration diagram of one embodiment of the present invention The figure for demonstrating operation | movement of the full tank mode only today of the same embodiment

Next, a hot water storage type hot water supply apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings.
2 is a hot water storage tank unit having a stainless steel hot water storage tank 3 for storing hot water, and 4 is a heat pump unit as a heating means for boiling up hot water in the hot water storage tank 3 mainly at midnight hours such as midnight hours. This is a remote controller for performing operations such as changing the hot water supply set temperature.

  The hot water storage tank unit 2 includes a water supply pipe 6 for supplying city water to the bottom of the hot water storage tank 3, a hot water discharge pipe 7 for discharging hot water from the upper part of the hot water storage tank 3, a water supply bypass pipe 8 branched from the water supply pipe 6, and a hot water supply pipe 7. Hot water mixing valve 9 for mixing hot water from the hot water supply water and water from the water supply bypass pipe 8 at a hot water supply set temperature, a hot water supply pipe 10 through which the hot water mixed by the hot water supply mixing valve 9 circulates, and in the middle of the hot water supply pipe 10 A hot water supply temperature sensor 11 provided to detect the hot water supply temperature, a hot water supply flow rate sensor 12 provided in the middle of the hot water supply pipe 10 to detect the hot water supply flow rate, a water supply temperature sensor 13 provided in the middle of the water supply bypass pipe 8 to detect the water supply temperature, A plurality of hot water storage temperature sensors 14 provided on the upper and lower sides of the hot water storage tank 2 to detect the hot water storage temperature, a pressure reducing valve 15 provided in the water supply pipe 6 to reduce the water supply pressure of city water to a constant pressure, and the hot water storage tank 2 Excess of An overpressure relief valve 16 for releasing heat, a heating forward pipe 17 for circulating hot water taken out from the bottom of the hot water storage tank 2 to be heated by the heat pump unit 4, and returning hot water heated by the heat pump unit 4 to the upper part of the hot water storage tank 2 A heating return pipe 18 to be circulated is provided.

  Further, in the hot water storage tank unit 2, the bath water circulates between the bath heat exchanger 20 for heating the bath water from the bathtub 19 with the heat of the hot water in the hot water storage tank 2, and the bathtub 19 and the bath heat exchanger 20. A bath circulation circuit 21 that can be connected, a bath circulation pump 22 that is provided in the middle of the bath circulation circuit 21 and circulates bath water, and a heat exchanger bypass pipe 23 that connects the bath circulation circuit 21 by bypassing the bath heat exchanger 20. And a three-way valve 24 for switching whether the bath water from the bathtub 19 flows to the bath heat exchanger 20 side or the heat exchange bypass pipe 23 side, and the temperature of the bath water flowing from the bathtub 19 to the bath heat exchanger 20 is detected. A bath temperature sensor 25 that detects the presence or absence of circulation of bath water in the bath circulation circuit 21, and a water level sensor 27 that detects the water level in the bathtub 19 are provided.

  Further, the hot water storage tank unit 2 includes a hot water pipe 28 branched from the hot water supply pipe 10 and connected in the middle of the bath circulation circuit 21, and a hot water flow rate sensor 29 provided in the middle of the hot water pipe 27 to detect the hot water flow rate. A hot water temperature sensor 30 provided in the middle of the hot water pipe 28 for detecting the hot water temperature, a hot water on / off valve 31 comprising an electromagnetic valve provided in the middle of the hot water pipe 28, and a downstream of the hot water on / off valve 31. And a hopper valve 32 for draining the bath water to the outside when the backflow pressure from the bathtub 19 is higher than the water supply pressure upstream of the hot water on / off valve 31.

  The heat pump unit 4 radiated heat by the compressor 33 that compresses the refrigerant, the refrigerant water heat exchanger 34 that exchanges heat between the compressed high-temperature refrigerant and the hot water from the hot water storage tank 3, and the refrigerant water heat exchanger 34. An expansion valve 35 for reducing the pressure of the refrigerant, an evaporator 36 for evaporating the low-temperature and low-pressure refrigerant, a refrigeration cycle pipe 37 in which the compressor 33, the refrigerant water heat exchanger 34, the expansion valve 35 and the evaporator 36 are connected in an annular shape, A blower 38 that blows outside air as a heat source to the evaporator 36, an outside air temperature sensor 39 that detects outside air temperature, and a heating circulation pump 40 that supplies hot water from the hot water storage tank 3 to the water side of the refrigerant water heat exchanger 34 An incoming water temperature sensor 41 for detecting the temperature of hot water flowing from the heating forward pipe 16 to the refrigerant water heat exchanger 34, and a boiling temperature for detecting the temperature of hot water flowing from the refrigerant water heat exchanger 34 to the heating return pipe 17 Sensor 2 and is provided.

  The remote controller 5 includes a display unit 43 for displaying various types of information related to the water heater (hot water set temperature, bath set temperature, bath set hot water amount, remaining hot water amount, operating state of the water heater, etc.), hot water set temperature and bath set temperature, A setting switch 44 for setting and operating the bath setting hot water amount, a hot water switch 45 for instructing the bathtub 19 to supply hot water of the bath setting hot water amount, and forcibly boiling by driving the heat pump unit 4 even during daytime hours. A reheating switch 46 for performing reheating, a reheating stop switch 47 for inhibiting reheating after the operation point, and a menu switch 48 for calling a hierarchical menu setting screen for performing detailed setting of the hot water storage hot water supply device 1 are provided. It is provided.

  49 is provided in the hot water storage tank unit 2, and includes a hot water supply temperature sensor 11, a hot water supply flow rate sensor 12, a water supply temperature sensor 13, a hot water storage temperature sensor 14, a bath temperature sensor 25, a running water switch 26, a water level sensor 27, a hot water flow rate sensor 29, The detection value of the hot water temperature sensor 30 is input to control the operation of the hot water supply mixing valve 9, the bath circulation pump 22, the three-way valve 24, and the hot water on / off valve 31, and the necessary information with the heat pump unit 4 and the remote controller 5. It is the hot water storage control means connected so that transmission / reception is possible. Here, the hot water storage control means 49 has a logic circuit such as an MPU and controls the operation according to a program stored in advance while referring to the memory.

  50 is provided in the heat pump unit 4, and the detected values of the outside air temperature sensor 39, the incoming water temperature sensor 41, and the boiling temperature sensor 42 are input, and the compressor 33, the expansion valve 35, the blower 38, and the heating circulation pump 40 are operated. The heating control means is connected to the hot water storage control means 49 so as to be able to transmit and receive necessary information. Here, the heating control means 50 has a logic circuit such as an MPU and controls the operation according to a program stored in advance while referring to the memory.

  51 is provided in the remote controller 5, receives operation signals from various switches 44 to 48 and signals from the hot water storage control means 49, causes the display unit 43 to perform predetermined necessary display and operates the hot water storage control means 49. Remote control means for transmitting a signal based on the signal. Here, the remote control means 51 has a logic circuit such as an MPU and controls the operation according to a program stored in advance while referring to the memory.

  Here, the hot water storage control means 49, the heating control means 50, and the remote control control means 51 exchange necessary information and behave as control means for controlling the operation of the hot water storage water heater 1 in cooperation with each other.

  Next, the boiling operation in the midnight time zone will be described. When the hot water storage control means 49 constituting the boiling control means comes in the midnight time zone, the detection values of various sensors such as the hot water flow rate sensor 12 and the hot water temperature sensor 11 are detected. The amount of boiling is determined according to the amount of hot water used per day learned based on the above, and when the boiling start time calculated so as to boil up at the end time of the midnight time zone is reached, the heat pump unit 4 is driven to perform the boiling operation The heat pump unit 4 is stopped and the boiling operation is finished when the end time of the midnight time zone is reached.

  Next, the heating operation during the daytime period will be described.The heating operation during the daytime period depends on the type of the heating mode that has been selected and set in advance. In the normal boiling mode, which boils up in the daytime in addition to boiling up in the midnight hours based on the past learning hot water volume, the boiling up operation based on the past learning hot water volume is not performed. Subtract the amount boiled in the midnight time zone from the amount, and heat the heat pump unit 4 at the appropriate time in the daytime time zone (generally immediately before the time zone when there is a lot of hot water supply load) In the full tank mode where the hot water storage tank 3 is always filled with hot water in the daytime hours, in addition to boiling in the midnight hours, hot water is supplied during the daytime hours. Therefore, when a certain amount or more of water is stored in the lower part of the hot water storage tank 3 and the second hot water storage temperature sensor 14 from the bottom of the hot water storage tank 3 starts to boil and detects a temperature lower than the predetermined temperature, the heat pump unit 4 is driven to drive the hot water storage tank 3. The bottom hot water storage temperature sensor 14 is boiled until the boiling end is detected and a predetermined temperature (> predetermined start temperature for boiling) or higher is detected, and the boiling operation for filling the hot water storage tank 3 with hot water is repeated. .

  Here, the boiling start condition and the boiling stop condition in the full tank mode are not limited to the above-described example, but may be those that can appropriately maintain the hot water storage tank 3 in a full tank. As a starting condition, when the third hot water storage temperature sensor 14 from the bottom of the hot water storage tank 3 detects a boiling start temperature or less, a boiling start is started, and the hot water storage temperature sensor 14 at the bottom of the hot water storage tank 3 starts boiling and is the same as the predetermined heat start temperature. When the predetermined temperature is detected at the end of boiling, or when the water temperature sensor 41 of the heat pump unit 4 detects the predetermined temperature at the end of boiling at the same temperature as the predetermined temperature at which boiling starts, the boiling operation is stopped. Good.

  This boiling mode is selected and set by a setting operation of the remote controller 5, and a boiling mode setting screen stored in the remote control means 51 is displayed by a predetermined operation of the menu switch 48 and the setting switch 44 a plurality of times. It is displayed on the unit 43, and one of the plurality of boiling modes is selected by operating the setting switch 44 and determined by operating the menu switch 48. This boiling mode does not change frequently, and if it is changed carelessly and an inappropriate mode is selected, there is a risk of economic loss due to running out of water or unnecessary boiling. The items are provided in a shallow hierarchy.

  Here, in the normal boiling mode and full tank mode, when the user determines that the amount of hot water stored in the hot water storage tank 3 at the present time is sufficient and the subsequent boiling increase is unnecessary and the boiling increase pause switch 47 is operated, Until this time (here, the start time of the midnight time zone) is reached, the boiling-up operation is prohibited.

  On the other hand, in the normal boiling mode or the midnight only mode, when the amount of hot water used is a little larger than usual, the user determines that there is a risk of running out of hot water and operates the boiling switch 46 of the remote controller 5 to maintain a constant level. A forced boiling operation is performed for a certain amount of time or a certain amount of time to increase the amount of hot water stored in the hot water storage tank 3 so that the hot water does not run out.

  Here, the amount of boiling increase by the boiling increase switch 46 is selectable. For example, the boiling increase switch 46 is heated for one hour by one operation, and the second increase by two operations is performed for 2 hours. Also good.

  In addition, when a much larger amount of hot water than usual is required due to a sudden visitor or the like, the user operates the reheating switch 46 of the remote controller 5 a plurality of times to set the full tank mode only today.

  Here, in the full tank mode only today, the temperature detected by the hot water storage temperature sensor is detected when the hot water storage temperature sensor 14 starts to boil up and falls below a predetermined temperature from the setting operation time to the predetermined time of the day (24:00 here). The heat pump unit 4 is driven until the boiling temperature reaches the predetermined temperature or more, and the full tank boiling is repeatedly performed. At the predetermined time, the full tank mode is canceled only today and the original boiling mode is set. Of the plurality of boiling modes, setting is possible only in a boiling mode other than the full tank mode. It should be noted that the start condition and the stop condition of the boiling increase operation conform to the conditions in the full tank mode.

  Next, the full tank mode will be described with reference to FIG. 2 only today. When the user operates the increase switch 46 of the remote controller 5, the increase amount selection screen 52 is displayed on the display unit 43 of the remote controller 5, and the selection cursor 53. Is displayed in the top option on the reheating amount selection screen 52, and the selection cursor 53 is moved to the next option by operating the reheating switch 46 a plurality of times, and a state where the full option is selected only today. When the menu switch 48 is operated, the full tank mode is set only today. In this way, the remote control means 51 and the reheating switch 46 constitute a full tank setting means only today.

  After the full tank mode is set only today, hot water can be used without worrying about running out of hot water because the full tank is repeatedly heated every time the hot water in the hot water storage tank 3 decreases due to hot water supply or the like.

  Then, if the reheating switch 46 is operated again or the reheating stop switch 47 is operated again, even if the predetermined time has not arrived, the full tank mode is canceled only today and the original boiling mode is set. . Even if such a release operation is not performed, when the predetermined time arrives, the full tank mode is automatically canceled only today, and the original boiling mode is set.

  In this way, it is possible to easily set the mode to maintain a full tank without performing an operation that requires a procedure such as a change operation of the boiling mode, without causing hot water to run out due to a sudden increase in the amount of hot water used. In addition to being able to respond, the mode that automatically maintains the full tank at the predetermined time is canceled, and the setting can be canceled by an easy operation, and the unnecessary full tank state due to forgetting to cancel the setting continues A situation can be avoided and an economical hot water storage type hot water supply apparatus can be provided.

  Note that it is desirable that the full tank setting means is configured so that the setting operation can be performed by a simple operation of the operation switch of the remote controller 5 only in the present day. In this embodiment, the operation is performed by the reheating switch 46 which is partially functionally common. However, the present invention is not limited to this, and an independent operation switch for setting the full tank mode only today may be provided.

  In addition, the heating switch 46 and the heating stop switch 47 are illustrated as switches that are operated when the user releases the setting after the full tank mode is set only today, but these switches are related to the heating operation. Therefore, it is suitable as a switch to be released and intuitive operation is possible, and other switches are not suitable as switches for release because they are not highly related to the heating operation.

  The present invention is not limited to the above-described embodiment, and can be modified without changing the gist of the invention. For example, the heat pump unit 4 is used as a heating means, but the hot water storage tank 3 is directly connected. It is good also considering the arrange | positioned electric heater as a heating means.

1 Hot water storage type hot water supply device 3 Hot water storage tank 4 Heat pump unit (heating means)
5 Remote control 6 Water supply pipe 7 Hot water discharge pipe 9 Hot water supply mixing valve 10 Hot water supply pipe 14 Hot water storage temperature sensor 46 Hot water increase switch 47 Hot water increase stop switch 49 Hot water storage control means 50 Heating control means 51 Remote control control means

Claims (2)

  A hot water storage tank for storing hot water, a hot water temperature sensor for detecting the temperature of the hot water in the hot water storage tank, a heating means for heating the hot water in the hot water storage tank, a water supply pipe for supplying water to the hot water storage tank, and the hot water storage tank A hot water supply pipe for discharging hot water, a hot water mixing valve for mixing water branched from the water supply pipe and hot water from the hot water discharge pipe to a set temperature, a hot water supply pipe for supplying hot water from the hot water supply mixing valve to the outside, Boiling control means for boiling water in the hot water storage tank by the heating means at midnight, and a remote control for displaying the hot water storage state and set temperature in the hot water storage tank and changing the set temperature. In the hot water storage type hot water supply apparatus, the heating means is fully heated by a predetermined setting operation so that the hot water tank is maintained in a full tank state from the setting operation time to a predetermined time. Hot water storage type water heater, characterized in that provided only full setting means to said remote today only be set to full mode today repeating increase.   2. The hot water storage type hot water supply apparatus according to claim 1, wherein in the state where the full tank mode is set only for today, the full tank mode is canceled only for today by operating a specific switch of the remote controller.

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