JP2007240089A - Storage type water heater and storage type hot water supply and heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely perform fixing preventing operation of a mixing valve of a storage type water heater without making a user mix it with abnormal sound. <P>SOLUTION: This storage type water heater comprises a hot water storage tank 2 storing hot water; a heating means 3 circulating and heating hot water in the hot water storage tank 2; a circulation circuit 4 connecting the hot water storage tank 2 with the heating means 3 so that the hot water can be circulated; a circulating pump 5 provided in the circulation circuit 4; a water supply pipe 6 supplying water to the tank 2; a hot water supply pipe 7 supplying hot water from the tank 2; a water supply branch pipe 8 branched from the water supply pipe 6; and a mixing valve 9 supplying hot water from the hot water supply pipe 7 while mixing it with water from the water supply branch pipe 8. The mixing valve 9 is driven at the time of operation of the heating means 3 for preventing the fixation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hot water storage type hot water supply apparatus and a hot water storage type hot water supply and heating apparatus.

Conventionally, in this kind of thing, as shown in patent document 1, in order to prevent that the mixing valve which mixes hot water and water and supplies hot water of preset temperature sticks, The valve body is temporarily moved by driving the mixing valve constantly or frequently or sometimes to prevent the valve body from being stuck due to scale, rust, or scale.
Japanese Patent Laid-Open No. 8-161054

  However, in this conventional system, the mixing valve is driven constantly, frequently or sometimes when the hot water is stopped, so that the noise caused by suddenly driving the mixing valve when the operation such as hot water is not performed. As a result of this, it was misleading to the user that an abnormal sound was generated from the instrument, and it was driven constantly, frequently, or sometimes, and thus consumed a lot of unnecessary power. .

  To solve the above problems, the present invention provides a hot water storage tank for storing hot water, a heating means for circulatingly heating the hot water in the hot water storage tank, and a circulation circuit for connecting the hot water storage tank and the heating means in a circulatory manner. A circulation pump provided in the circulation circuit; a water supply pipe supplying water to the hot water storage tank; a hot water discharge pipe discharging from the hot water storage tank; a water supply branch pipe branched from the water supply pipe; and hot water from the hot water supply pipe And a mixing valve for mixing and supplying hot water from the water supply branch pipe, and the mixing valve is driven to prevent sticking when the heating means is operated.

  In order to solve the above problems, a hot water storage tank for storing hot water, a heating means for circulatingly heating the hot water in the hot water storage tank, a circulation circuit for connecting the hot water storage tank and the heating means in a circulating manner, A circulation pump provided in a circulation circuit; a water supply pipe supplying water to the hot water storage tank; a hot water discharge pipe discharging from the hot water storage tank; a water supply branch pipe branched from the water supply pipe; hot water from the hot water supply pipe; A mixing valve for mixing and supplying hot water from the water supply branch pipe, and adding a heating function for heating using hot water in the hot water storage tank as a heat source, and an electric valve or a heating circulation pump used for the heating function. It was driven to prevent sticking when the heating means was operated.

  According to the present invention, since the sticking prevention operation is performed when the heating unit is operated, the sticking prevention operation sound is mixed with the operation sound of the actuator of the heating unit, so that the user is misunderstood that abnormal noise is generated from the instrument. In addition, since the opportunity for performing the sticking prevention operation is limited, the sticking prevention can be surely performed and, at the same time, wasteful power consumption can be suppressed.

A hot water storage type hot water supply apparatus according to an embodiment of the present invention will be described with reference to the drawings.
This hot water storage type hot water supply device boils and stores hot water in the midnight hours when the unit price of contracted power by time is low, and uses the hot water stored for hot water supply. 1 is a hot water storage tank 2 for storing hot water. 3 is a heat pump type heating means for heating hot water in the hot water storage tank 2, 4 is a circulation circuit for connecting the hot water tank 2 and the heating means 3 so that hot water can circulate, and 5 is a circulation circuit 4. It is a circulation pump provided in the outgoing pipe to the heating means 3.

  6 is a water supply pipe that supplies water to the bottom of the hot water storage tank 2, 7 is a hot water discharge pipe that discharges from the top of the hot water storage tank 2, 8 is a water supply branch pipe branched from the water supply pipe 6, and 9 is a branch of hot water from the hot water supply pipe 7 A mixing valve that mixes water from the pipe 8 to supply hot water at a set temperature of hot water supply 10 is a hot water supply pipe that supplies hot water mixed by the mixing valve 9 to the outside, and 11 is a hot water supply pipe 10 immediately after the mixing valve 9. A hot water temperature sensor for detecting the temperature of hot water mixed by the mixing valve 9 and a pressure reducing valve 12 for reducing the pressure of the hot water, and the temperature detected by the hot water temperature sensor 11 is controlled by a remote controller (not shown). The motor for moving the valve body is driven so as to reach the hot water supply set temperature set in (1), and the mixing ratio is controlled.

  Reference numeral 13 denotes a plurality of hot water storage temperature sensors provided in the vertical direction of the side surface of the hot water storage tank 2, and reference numeral 14 denotes a control for controlling the operation of the actuators such as the mixing valve 9 and the circulation pump 5 when the sensor outputs of the hot water storage tank unit 1 are inputted. Means. This control means 14 calculates the amount of boiling heat required by the morning of the next day from the amount of remaining hot water detected by the hot water storage temperature sensor 13 at midnight, and calculates the peak shift time at which heating is started to boil the next morning. .

  The heating means 3 comprises a heat pump type heating means comprising a compressor 15 for compressing refrigerant, a refrigerant water heat exchanger 16 as a gas cooler, an electronic expansion valve 17 as a decompression means, and a forced air-cooled evaporator 18. It is what has been.

  When the hot water tap (not shown) is opened, the hot water in the hot water storage tank 2 and the water supplied from the water supply branch pipe 8 are mixed by the mixing valve 9 so as to reach the hot water supply set temperature set by the remote controller. Is done.

  At this time, once the hot water supply set temperature is set, it is often not changed, and the temperature of the hot water supplied from the hot water storage tank 2 to the mixing valve 9 or the water supplied from the water supply branch pipe is stable at a constant temperature. Once the stable supply of hot water is performed, the mixing valve 9 is not driven much thereafter. For this reason, it is conceivable that the valve body due to scale, rust, or scale adheres due to long-term use. Therefore, the control means 14 is forcibly driven to prevent the mixing valve 9 from sticking when the heating means 3 is operated.

  Next, the operation will be described with reference to the flowchart of FIG. 2. In step S 1 (hereinafter abbreviated as S 1), when the unit price of contract power by time zone is an inexpensive midnight time zone, the control means 14 controls the hot water storage temperature sensor 13. Detects the amount of hot water in the hot water storage tank 2 and calculates the amount of heat necessary for the next day and the amount of heat to boil during midnight (S2). The shift time is calculated (S3).

  When the peak shift time is reached (Yes in S4), the circulation pump 5 and the heating means 3 are started to start and the boiling operation is started (S5). Then, while confirming that no hot water is being supplied, at the same time, the mixing valve 9 is forcibly driven only once in the fully open direction and fully closed direction to prevent the valve body from sticking (S6), and then the original valve Return to body opening.

  When the necessary amount of heat is boiled (S7) or when the midnight time period ends (S8), the circulation pump 5 and the heating means 3 are stopped and the boiling operation is completed (S9).

  As described above, since the operation of preventing the adhering of the mixing valve 9 is performed when the heating unit 3 is operated, the operation sound of the actuator (the compressor 15 and the electronic expansion valve 17) of the heating unit 3 is mixed with the operation sound of the adhering prevention. In addition, there is no misunderstanding that abnormal noise has occurred from the instrument, and the opportunity to perform the sticking prevention operation is limited, so that sticking prevention can be surely performed and at the same time reducing wasteful power consumption It is something that can be done.

  Next, a hot water storage type hot water supply and heating apparatus according to another embodiment of the present invention will be described with reference to FIG. In addition, it adds the heating function to the hot water storage type hot water supply apparatus of the previous one embodiment, the same reference numerals are given to the same configurations as the hot water storage type hot water supply apparatus of the previous one embodiment, and the description thereof is omitted. And

  19 is a heating heat exchanger that uses the high-temperature water in the hot water storage tank 2 as a heat source to heat the heating terminal (not shown), 20 is a primary pump that circulates high-temperature water through the heating heat exchanger 19, and 21 is heating heat. A switching valve 22 for selecting the lower position of the hot water layer in the hot water storage tank 2 to return the hot water whose temperature has been reduced by exchanging heat in the exchanger 19, and 22 is a secondary pump for circulating the heated circulating water to the heating terminal. is there.

  When the start of the heating operation is instructed by the remote controller or the like, the primary pump 20 and the secondary pump 22 are driven, the circulating water heated by the heating terminal is circulated, the heating operation is performed, and the temperature decreases 1 The hot water on the next side is returned to the hot water storage tank 2. At this time, the switching valve 21 selects the return pipe above the boundary layer between the hot water and the water in the hot water storage tank 2, and retains the hot water whose temperature has been lowered by returning the hot water to the upper part above the hot water boundary layer. It makes it possible to use it effectively so as not to mix the amount of heat into the water supply.

  In this type of hot water storage type hot water supply and heating device, the primary side of the heating heat exchanger 19 is not operated in the season when heating is not required. Therefore, the primary pump 20 is caused by scale, rust, or scale due to long-term non-use. It is conceivable that the switching valve 21 is stuck. Therefore, the control means 14 forcibly drives the motorized valve (switching valve 21) or the heating pump (primary pump 20) used for the heating function when the heating means 3 is operated to prevent sticking. .

  In such a hot water storage type hot water supply and heating apparatus, similarly to the hot water storage type hot water supply apparatus in the previous embodiment, it operates according to the flowchart shown in FIG. Since the operation for preventing sticking of the primary pump 20 for heating is performed, the sticking prevention operation sound is mixed with the operation sound of the actuator (compressor 15 and electronic expansion valve 17) of the heating means 3, so that the user may differ from the instrument. There is no misunderstanding that sound has occurred, and the opportunity to perform the sticking prevention operation is limited. Therefore, sticking prevention can be reliably performed and wasteful power consumption can be suppressed.

  Also in this hot water storage type hot water supply and heating apparatus, the mixing valve 9 is prevented from sticking in the same manner as the hot water storage type hot water supply apparatus in the previous embodiment.

  In addition, this invention is not limited to said embodiment, Although the switching valve 21 and the primary pump 20 were mentioned as a target object which performs sticking prevention operation | movement, the motor operated valve and pump provided in the primary side The same effect can be achieved with an actuator such as the above.

  The timing for performing the sticking prevention operation may be any time as long as it is possible to prevent the user from misunderstanding that an abnormal sound has occurred from the instrument. In this case, since the operation sound of the actuator is continuously generated, it is difficult to give a misunderstanding that abnormal noise is generated from the appliance. The meaning includes immediately before and after.

The schematic block diagram of the hot water storage type hot water supply apparatus of one Embodiment of this invention. The flowchart for demonstrating the action | operation of this invention. The schematic block diagram of the hot water storage type hot-water supply and heating apparatus of other one Embodiment of this invention.

Explanation of symbols

2 Hot water storage tank 3 Heating means 4 Circulation circuit 5 Circulation pump 6 Water supply pipe 7 Hot water discharge pipe 8 Water supply branch pipe 9 Mixing valve

Claims (3)

A hot water storage tank for storing hot water, a heating means for circulatingly heating the hot water in the hot water storage tank, a circulation circuit for connecting the hot water storage tank and the heating means in a circulatorable manner, and a circulation pump provided in the circulation circuit; A water supply pipe for supplying water to the hot water storage tank, a hot water discharge pipe for discharging hot water from the hot water storage tank, a water supply branch pipe branched from the water supply pipe, hot water from the hot water discharge pipe and water from the water supply branch pipe are mixed. And a mixing valve for supplying hot water,
A hot water storage type hot-water supply apparatus, wherein the mixing valve is driven to prevent sticking when the heating means is operated. A hot water storage tank for storing hot water, a heating means for circulatingly heating the hot water in the hot water storage tank, a circulation circuit for connecting the hot water storage tank and the heating means in a circulatorable manner, and a circulation pump provided in the circulation circuit; A water supply pipe for supplying water to the hot water storage tank, a hot water discharge pipe for discharging hot water from the hot water storage tank, a water supply branch pipe branched from the water supply pipe, hot water from the hot water discharge pipe and water from the water supply branch pipe are mixed. And a mixing valve for supplying hot water,
A heating function for heating using hot water in the hot water storage tank as a heat source is added, and an electric valve or a heating circulation pump used for the heating function is driven to prevent sticking when the heating means is operated. A hot water storage hot water heater.   The hot water storage type hot water supply apparatus according to claim 1 or the hot water storage type according to claim 2, wherein the heating means is a heat pump type heating means including a compressor, a refrigerant water heat exchanger, a decompression means, and an evaporator. Hot water heater.

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