JP2006132859A - Hot water storage type hot water supply apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inform a user of high pressure abnormality of a hot water storage tank and to intercept water supply into the hot water storage tank to prevent a lowering of reliability caused by the continuation of a high pressure state. <P>SOLUTION: This hot water storage type hot water supply apparatus is provided with the hot water storage tank 1 for storing water; a water supply circuit 3 for supplying water into the hot water storage tank 1 from a water supply source via a pressure reducing valve 2; a heating means 4 for heating water in the hot water storage tank 1; a relief valve 5 for discharging expansion water boiled by the heating means 4, to the outside of the hot water storage tank; a can protecting valve 8 for discharging water to the outside of the hot water storage tank 1 when pressure in the hot water storage tank 1 becomes a predetermined pressure or higher owing to the pressure reducing valve 2 or the relief valve 5; and a water detecting means 13 for detecting a water leakage from the can protecting valve. The inside of the hot water storage tank 1 is prevented from continuing to be in a high pressure state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  Conventionally, as shown in FIG. 4, this kind of hot water storage type hot water supply apparatus includes a hot water storage tank 1 for storing water, a water supply circuit 3 to the hot water storage tank 1 through a pressure reducing valve 2 from a water supply source, and the hot water storage. Heating means 4 for heating and heating the water in the tank 1, a relief valve 5 for releasing the expanded water being heated, and when the pressure in the hot water storage tank 1 exceeds a predetermined pressure, the water is discharged out of the hot water storage tank 1. Some cans have a can body protection valve 8 (see, for example, Patent Document 1).

  In FIG. 4, the pressure reducing valve 2, the relief valve 5, and the can body protection valve 8 are provided to prevent high pressure in the entire device including the hot water storage tank 1. In particular, the can protection valve 8 is provided assuming that the pressure reducing valve 2 and the relief valve 5 do not operate normally for some reason, and is set higher than the operating pressure of the pressure reducing valve 2 and the relief valve 5. Has been. And the water leak from the hot water storage tank 1 which generate | occur | produces at the time of operation of the can body protection valve 8 becomes a structure discharged | emitted out of an apparatus main body.

For example, when the pressure reducing valve 2 fails and the pressure of the water supply source is not reduced to the set pressure of the pressure reducing valve 2, water is supplied into the hot water storage tank 1, and at the same time the relief valve 5 fails, the high pressure in the hot water storage tank 1 is increased. In order to prevent this, the water in the hot water storage tank 1 that has risen above the set pressure of the can body protection valve 8 is discharged out of the device body.
JP-A-7-103569

  However, in the said conventional structure, since the water leak from the can body protection valve 8 is discharged | emitted out of an apparatus main body, without notifying a user, a user does not notice abnormality of an apparatus. And, if the pressure in the hot water storage tank 1 is always higher than the set pressure of the can body protection valve 8, the water will continue to be drained, which is of course uneconomical and will be at a higher pressure than normal. Therefore, it has a problem of adversely affecting the reliability of the device.

  The present invention solves the above-described conventional problem, and notifies the user of a high-pressure abnormality in the hot water storage tank, shuts off the water supply to the hot water storage tank, and prevents a decrease in reliability due to the continued high pressure state. An object is to provide a hot water storage type hot water supply apparatus.

  In order to solve the above-described conventional problems, the hot water storage type hot water supply apparatus of the present invention includes water detection means for detecting water leakage from the can body protection valve.

  This notifies the user of the high pressure abnormality in the hot water storage tank and the abnormal state of the pressure reducing valve and the relief valve.

  The hot water storage type hot water supply apparatus of the present invention notifies the user of the high pressure abnormality of the hot water storage tank caused by the abnormal state of the pressure reducing valve or the relief valve, cuts off the water supply to the hot water storage tank, and continues the high pressure state. Prevent degradation of reliability.

  The first invention is a hot water storage tank for storing water, a water supply circuit for supplying water to the hot water storage tank through a pressure reducing valve from a water supply source, a heating means for heating water in the hot water storage tank, and the heating means A relief valve for discharging the expanded water boiled by the outside of the hot water storage tank, and a can body for discharging water to the outside of the hot water storage tank when the pressure in the hot water storage tank exceeds a predetermined pressure by the pressure reducing valve or the relief valve By providing a protection valve and water detection means for detecting water leakage from the can body protection valve, the can body protection valve can be used when the pressure reducing valve or the relief valve fails and the pressure in the hot water storage tank rises above a predetermined pressure. The water discharged from the water can be detected, and the abnormal state of the crisis can be notified to the user.

  In the second invention, in particular, the water detection means of the first invention is provided integrally with the can body protection valve. As a result, when the pressure reducing valve or the relief valve breaks down and the pressure in the hot water storage tank rises above the specified pressure, it is possible to detect the water discharged from the can body protection valve, and inform the user of the abnormal state of the crisis. Not only can this be done, but it also saves space in the water detection means.

  In the third invention, in particular, the water detection means of the first invention is provided at the bottom of the exterior material covering at least the hot water storage tank and the relief valve, and leakage water other than leakage water from the can body protection valve is also detected. It is possible to detect abnormalities in the apparatus.

  In particular, according to a fourth aspect, in the third aspect, a pipe for guiding the water leaked from the can body protection valve to the water detection means is provided, and the water leak from the can body protection valve can be detected reliably and early.

  5th invention is equipped with the shut-off valve which interrupts | blocks the water supply from a water supply source in conjunction with the water detection means detecting the water leak especially in 2nd-4th invention, The pressure which raised abnormally In order to prevent the water for lowering the water from being continuously discharged, water is not wasted.

  In particular, the sixth invention is provided with a notification device for notifying the operation of the can body protection valve in conjunction with the detection of water leakage by the water detection means in the fifth invention, and the user has a simple configuration. It is possible to know abnormalities in the pressure reducing valve and the relief valve and abnormal pressure in the hot water storage tank.

  The seventh invention is a heat pump cycle in which the refrigerant is carbon dioxide as the heating means in the first to sixth inventions, and can efficiently heat the water in the hot water storage tank.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

FIG. 1 shows a configuration diagram of a hot water storage type hot water supply apparatus according to an embodiment of the present invention.

  In FIG. 1, hot water stored in a hot water storage tank 1 is supplied from a water supply circuit 3. A pressure reducing valve 2 and a shutoff valve 11 are connected to the water supply circuit 3 on the way.

  A heating means 4 is provided in the hot water storage tank 1 for heating and heating the water in the hot water storage tank 1. The expansion water boiled by the heating means 4 needs to be drained out of the hot water storage tank 1 in order to prevent high pressure in the hot water storage tank 1, and a relief valve 5 for draining is provided at the top of the hot water storage tank 1. The can body protection valve 8 is provided at the lower part of the hot water storage tank 1.

  The can body protection valve 8 is provided on the assumption that the pressure reducing valve 2 and the relief valve 5 fail for some reason and do not operate. For example, when the pressure reducing valve 2 fails and the pressure of the water supply source is not reduced to the set pressure of the pressure reducing valve 2, water is supplied into the hot water storage tank 1, and at the same time the relief valve 5 fails, the hot water storage tank 1 is abnormal. It is dangerous to use under extreme high pressure conditions. In order to avoid such a danger, the operating pressure of the can body protection valve 8 is set higher than the operating pressure of the pressure reducing valve 2 and the relief valve 5. And when the pressure of the hot water storage tank 1 reaches a predetermined operating pressure, the hot water in the hot water storage tank 1 is drained through the can body protection valve 8.

  The drainage leaked from the can body protection valve 8 is detected by the water detection means 13 provided integrally with the can body protection valve 8. And if the water detection means 13 detects drainage, the detection result will be transmitted to the controller 10. FIG. An alarm device 12 and a shutoff valve 11 are connected to the controller 10.

  The hot water storage tank 1, the pressure reducing valve 2, the relief valve 5, and the can body protection valve 8 described above are covered with the exterior material 6, and the water leakage detection means 7 that detects the water leakage inside the device at the bottom 6 a of the exterior material 6. There is. When the water leakage detection means 7 detects the water leakage, the detection result is transmitted to the controller 10.

  The operation and action of the hot water storage type hot water supply apparatus configured as described above will be described below.

  First, when the pressure reducing valve 2 or the relief valve 5 breaks down and the pressure in the hot water storage tank 1 rises above a predetermined pressure, the water detection means 13 detects the water discharged from the can body protection valve 8. The detection result of the water detection means 13 is transmitted to the controller 10.

  The controller 10 that has received the detection result emits a warning sound or the like to the user via the alarm device 12. Moreover, the cutoff valve 11 connected to the controller 10 is controlled, and the cutoff valve 11 is closed so as to cut off the water supply from the water supply source.

  As described above, according to the present embodiment, the user is notified that water has been discharged from the can body protection valve 8, so that the user immediately notices an abnormality in the pressure reducing valve 2 and the relief valve 5, and immediately Can be repaired. In addition, since water is prevented from being continuously discharged, water is not used wastefully, safety and reliability can be improved, and water waste due to drainage can be prevented. Moreover, since the water detection means 13 is provided integrally with the can body protection valve 8, not only is a space secured, but water leaking from the can body protection valve 8 can be detected quickly.

  In the present embodiment, the heating means 4 is provided in the hot water storage tank 1, but a configuration as shown in FIG. In FIG. 2, the heating means 4 is provided outside the hot water storage tank 1. The heating means 4 is a heat pump cycle in which heating is performed using, for example, a refrigerant, and is a supercritical heat pump cycle in which the pressure of the refrigerant is equal to or higher than the critical pressure. Carbon dioxide, Freon gas, ammonia, or the like is used as the refrigerant.

  Moreover, when the water detection means 13 detected the water discharged | emitted from the can body protection valve 8, although it said that controlling the alarm 12 and the cutoff valve 11 was carried out, when the water leak detection means 7 detected leak water, The water leak detection means 7 may be used as the water detection means 13 by controlling the alarm device 12 and the shutoff valve 11 via the controller 10.

  By using the water leakage detection means 7 as the leakage water detection means, it becomes possible to detect leakage water other than leakage water from the can body protection valve, and it is possible to detect an abnormality of the apparatus. Further, since the water leakage detection means 7 is also used as the water detection means 13, the water detection means 13 can be reduced and the cost can be reduced.

  Moreover, as shown in FIG. 3, a pipe 14 may be provided. The pipe 14 is connected so that the leaked water discharged from the can protection valve 8 reaches the leak detection means 7. According to the pipe 14, the leaked water discharged from the can body protection valve 8 can be reliably and quickly transmitted to the leak detecting means 7, the water detecting means 13 can be reduced, and the equipment configuration can be simplified. .

  As described above, the hot water storage type hot water supply apparatus according to the present invention notifies the user of the high pressure abnormality of the hot water tank caused by the abnormal state of the pressure reducing valve and the relief valve, and interrupts the water supply into the hot water storage tank, Prevents a decrease in reliability due to continued high pressure.

  And since it prevents the water from continuing to be discharged from the can body protection valve, water is not used wastefully, regardless of whether it is liquid or gas, etc. It can be applied to other safety devices.

The figure of the hot water storage type hot water supply apparatus of embodiment of this invention The figure of the hot water storage type hot water supply apparatus of embodiment of this invention The figure of the hot water storage type hot water supply apparatus of embodiment of this invention Figure of conventional hot water storage hot water supply system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Pressure reducing valve 3 Water supply circuit 4 Heating means 5 Relief valve 7 Water leakage detection means 8 Can body protection valve 11 Shut-off valve 13 Water detection means 14 Piping

Claims (7)

A hot water storage tank for storing water, a water supply circuit for supplying water to the hot water storage tank through a pressure reducing valve from a water supply source, a heating means for heating the water in the hot water storage tank, and an expansion boiled by the heating means A relief valve for discharging water out of the hot water storage tank, a can body protection valve for discharging water out of the hot water storage tank when the pressure in the hot water storage tank exceeds a predetermined pressure by the pressure reducing valve or the relief valve, and the can A hot water storage type hot water supply device comprising water detection means for detecting water leakage from a body protection valve. The hot water storage type hot water supply apparatus according to claim 1, wherein the water detection means is provided integrally with the can body protection valve. The hot water storage type hot water supply apparatus according to claim 1, further comprising a water detection means at the bottom of the exterior material covering at least the hot water storage tank and the relief valve. The hot water storage type hot water supply apparatus according to claim 3, further comprising a pipe for guiding water leaked from the can body protection valve to water detection means. The hot water storage type hot water supply apparatus according to any one of claims 2 to 4, further comprising a shutoff valve that shuts off water supply from a water supply source in conjunction with detection of water leakage by the water detection means. The hot water storage type hot water supply apparatus according to claim 5, further comprising a notification device that notifies the operation of the can body protection valve in conjunction with detection of water leakage by the water detection means. The hot water storage type hot water supply apparatus according to any one of claims 1 to 6, wherein the heating means is a heat pump cycle using carbon dioxide as a refrigerant.

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