JP4882603B2 - Water heater - Google Patents

Description

  The present invention relates to a configuration of a water leakage sensor of a water heater having a hot water storage tank.

  Conventionally, this type of water leakage sensor includes a water leakage sensor at the bottom of a water heater having a hot water storage tank, and the water leakage sensor detects water leakage and reports an abnormality (see, for example, Patent Document 1).

FIG. 6 is a configuration diagram of a water heater having a conventional water leakage sensor described in Patent Document 1. As shown in FIG. As shown in FIG. 6, a hot water storage tank 101 for storing hot water, a water supply pipe 102 for supplying water to the hot water storage tank 101, a heater 104 for boiling water in the hot water storage tank 101 to a predetermined temperature, and a hot water supply pipe for supplying hot water 103, a temperature detector 105 that detects the temperature of the hot water, and a controller 106 that detects a signal from the temperature detector 105 and controls the energization of the heater 104, and water leaks from the hot water storage tank 101 or the like. Then, water leaks out to the drain port 113 provided in the bottom plate 112 of the casing 111, and the water leak detector 115 provided in the drain port 113 detects and sends a signal to the controller 106. The controller 106 The alarm unit 116 is informed to stop energization of the heater 104.
Japanese Patent Laid-Open No. 05-5558

  However, in the above-described conventional configuration, the operation of draining hot water in the hot water storage tank boiled in a trial run after installation work, or the lower part of a drain outlet (for example, drainage) where water leaked from other equipment is disposed. If the water leaks into the groove, etc., the steam from the hot water flowing through the drainage groove will enter the main body from the drain outlet, and the steam will adhere to the leak sensor and condensation will occur. It had the problem of end.

  An object of the present invention is to solve the above-described conventional problems, and to prevent malfunction of a water leakage sensor and improve workability and reliability.

In order to solve the above-mentioned conventional problems, a water heater of the present invention includes a hot water storage tank for storing hot water, a housing for storing the hot water storage tank, and a water leakage sensor that is disposed at the bottom of the housing and detects water leakage with an electrode. The water generated in the bottom of the housing by passing through the water leakage sensor and the filter in order and discharged to the outside of the housing by attaching a filter to the drain port of the water leakage sensor It is characterized by.

  This makes it difficult for steam to pass by attaching a filter, thereby preventing malfunction of the water leakage sensor.

  The water heater of the present invention can prevent malfunction of the water leakage sensor and improve workability and reliability.

Water heater of the first aspect of the invention includes a hot water storage tank for storing hot water, the a housing for accommodating the hot water storage tank, and a leak sensor for detecting a leakage at the electrode arranged on the housing bottom, the water leakage sensor By attaching a filter to the drain, the water generated at the bottom of the housing passes through the water leakage sensor and the filter in order, and is configured to be discharged outside the housing , making it difficult for steam to pass through, Since malfunction of the water leakage sensor can be suppressed, the workability and reliability can be improved as a water heater.

  In the water heater of the second invention, since the filter is made into a mesh shape, a water film is formed on the filter by the vapor adhering to the mesh, and it is difficult for the vapor to pass through the drain port of the water leakage sensor.

  In the water heater of the third invention, since the filter is punched, the heat capacity of the filter is increased, a film of water is easily formed on the filter, and the vapor does not easily pass through the drain port of the water leakage sensor. In other words, when the steam rises, it is difficult to get warm with the steam in the initial stage, so dew condensation occurs quickly in the punching hole.

  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.

(Embodiment 1)
FIG. 1 is a configuration diagram of a water heater in the present embodiment. In FIG. 1, a water heater in the present embodiment includes a hot water storage tank 1, a water supply pipe 2 (water supply means) that supplies water to the hot water storage tank 1, a housing 10 that houses the hot water storage tank 1, It has a water leakage sensor 3 attached to the bottom plate 6 for detecting water leakage, a control means 4 for notifying a device abnormality by a signal from the water leakage sensor 3, and a remote controller 8 (display means) for displaying the device abnormality. Further, a stainless mesh filter 5 is attached to the drain port of the water leakage sensor 3. At the bottom of the water leakage Sensor 3 has drainage grooves 12 for discharging water leakage, hot water passing through the leak sensor over 3 flows into the water discharge groove 12.

  FIG. 2 is a cross-sectional view of the water leakage sensor 3 in the present embodiment. As shown in FIG. 2, a filter 5 is attached to the drain port of the water leakage sensor 3.

  Hereinafter, the operation at the time of water leakage will be described. Normally, when water leaks at the connecting portion of the hot water storage tank 1, water collects on the bottom plate 6 at the lower part of the hot water storage tank 1. The water is detected by the electrode 11 in the water leakage sensor 3 to determine that the water is leaking, and an abnormality of the device is displayed on the remote controller 8.

  Next, the shape of the filter 5 in the water heater of the present invention will be described. FIG. 3 is a diagram showing the passage amount of steam with respect to the mesh number of the filter 5, and FIG. 4 is a diagram showing the amount of drainage with respect to the mesh number of the filter 5. In FIG. 3, when the number of meshes is zero, that is, when the filter 5 is not provided in the leakage sensor, the passage of steam is detected by the leakage sensor without being prevented by the filter 5, so the passage amount of steam is set to 1. .

  As shown in FIG. 3, if the number of meshes is increased, the amount of passing steam decreases, and if the number of meshes is decreased, the amount of passing steam increases. That is, as the mesh becomes finer, the amount of steam that passes through decreases, so that it becomes difficult for the water leakage sensor 3 to erroneously detect steam from the drainage groove. Moreover, as FIG. 4 shows, if the number of meshes is increased, the amount of drainage decreases, and if the number of meshes is decreased, the amount of drainage increases. In other words, the finer the mesh, the more drainage capacity will be attenuated. In the present invention, the number of meshes is set to 20 in consideration of the balance between the amount of passing steam and the amount of drainage.

  As described above, by attaching the mesh filter to the drain port of the water leakage sensor 3, it is possible to suppress erroneous detection of vapor generated from the lower portion of the water leakage sensor 3 by the electrode 11.

(Embodiment 2)
FIG. 5 is a configuration diagram of the water heater in the present embodiment. In addition, about the same location as Embodiment 1, the same symbol is attached | subjected and description is abbreviate | omitted and a difference is demonstrated. The water heater in the second embodiment has a solenoid valve 7 at the connection between the hot water storage tank 1 and the water supply pipe 2.

  Hereinafter, the operation at the time of water leakage will be described. When water leakage occurs at the connecting portion of the hot water storage tank 1, water collects on the bottom plate 6 at the lower part of the hot water storage tank 1. The water is soaked in the electrode 11 in the water leakage sensor 3 to determine that the water is leaking, and the electromagnetic valve 7 is closed. By closing the solenoid valve 7, the water supply from the water supply pipe 2 to the hot water storage tank 1 is shut off to prevent the damage of water leakage from spreading, and an abnormality is displayed on the remote control 8 and a warning sound is generated. .

The filter 5 in the second embodiment has a punching shape made of stainless steel. Like the mesh shape in the first embodiment, if the hole for punching is large, the ability of blocking steam is lowered, and the drainage capacity is reduced. Will improve. In addition, if the hole for punching is small, the ability to block steam increases and the drainage capacity decreases. Therefore, in the second embodiment, the inner diameter of the drain port is Φ19, the punching hole diameter is Φ3, the punching number is 20, and the steam intrusion ability and the water leakage ability are balanced.

  In addition, because it is made of stainless steel, it has a large heat capacity, so when steam tries to pass, it quickly takes away the heat of the steam and the steam condenses, preventing the steam from passing through.

  As described above, by attaching the punching filter to the drain port of the water leakage sensor 3, it is possible to suppress erroneous detection of vapor generated from the lower portion of the water leakage sensor 3 by the electrode 11.

  As described above, the water heater according to the present invention prevents malfunction of a water leak sensor that detects water leak, and can be applied to prevent malfunction of water leak sensors of various water heaters such as heat pump hot water supply devices and electric water heaters. .

Configuration diagram of water heater in Embodiment 1 Sectional view of the water leakage sensor in the first embodiment Correlation diagram between the number of meshes and the amount of steam passing in the first embodiment Correlation diagram between number of meshes and amount of drainage in Embodiment 1 Configuration diagram of water heater in Embodiment 2 Configuration of conventional water heater

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Water supply pipe 3 Water leak sensor 4 Control means 5 Filter 6 Bottom plate 7 Solenoid valve 8 Remote control 10 Case 11 Electrode 12 Drainage groove

Claims (3)

A hot water storage tank for storing hot water, the a housing for accommodating the hot water storage tank, and a leak sensor for detecting a leakage at the electrode arranged on the housing bottom part, it was given the filter drain outlet of the water leakage sensor The water heater is characterized in that water generated at the bottom of the casing passes through the water leakage sensor and the filter in this order and is discharged out of the casing . The water heater according to claim 1, wherein the filter has a mesh shape. The water heater according to claim 1, wherein the filter is punched.

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