JP5157196B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to a hot water storage type water heater that can be connected to a mist generator.

A conventional mist generating device supplies water to a hot water supply device from a water supply pipe, and provides mist to a bathroom or the like by mixing the hot water of the hot water supply device with water from a water supply source (for example, Patent Documents). 1)
JP 2005-342087 A

Mist operation performed in a bathroom or the like largely depends on the user's preference and may not be used for a long time after use until the next use. However, if hot water is not supplied to the mist generating device for a long time, bacteria will propagate in the pipe that supplies hot water to the mist generating device. However, since it does not hang, the water in the pipe for supplying hot water to the mist generating device flows backward to the hot water storage tank side, and there is a problem that the bacteria that have propagated in the hot water storage tank enter.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a hot water storage type hot water heater in which hot water does not flow backward from a mist generating device into a hot water storage tank.

In order to solve the above-described conventional problems, a hot water storage type water heater of the present invention includes a hot water storage tank for storing hot water, a mist hot water pipe for discharging hot water at an upper portion in the hot water storage tank, and a mist water supply for supplying water. Mist mixing means for mixing a pipe, high-temperature water supplied from the mist hot water supply pipe and water supplied from the mist hot water supply pipe, and mist generation for jetting hot water mixed by the mist mixing means in a mist form A flow through which hot water to the mist generating device circulates, comprising a device, check means for determining the flow direction of hot water in one direction, and a bath hot water supply pipe for supplying high-temperature water in the upper part of the hot water storage tank to the bathtub. The check means is disposed only between the mist mixing means and the mist hot water pipe, and the mist hot water pipe is branched from the bath hot water pipe. It is.

  Thereby, the back flow of the hot water accumulated in the flow path leading to the mist generating device can be prevented, and a hygienic hot water storage type hot water heater can be provided.

Moreover, the sewage backflow to the hot water storage tank can be prevented while suppressing the cost. Moreover, since the mist hot water supply pipe is not directly connected to the hot water storage tank, a hot water storage type hot water heater can be realized with a simple configuration without changing the capacity.

  The hot water storage type hot water heater of the present invention can provide a hot water storage type hot water heater in which hot water does not flow back into the hot water storage tank from the mist generating device.

The hot water storage type hot water heater of the first invention comprises a hot water storage tank for storing hot water, a mist hot water pipe for discharging hot water at an upper portion in the hot water storage tank, a mist water supply pipe for supplying water, and the mist hot water pipe. Mist mixing means for mixing high temperature water supplied and water supplied from the mist feed pipe, a mist generating device for jetting hot water mixed in the mist mixing means, and a flow direction of the hot water A non-return means defined in one direction, and the non-return means is disposed in a flow path through which hot water to the mist generator flows, thereby preventing backflow from the mist generator to the hot water storage tank. A hygienic hot water storage type water heater can be provided .

Moreover, the sewage backflow to the hot water storage tank can be prevented while suppressing the cost.

Moreover, since the mist hot water supply pipe is not directly connected to the hot water storage tank, a hot water storage type hot water heater can be realized with a simple configuration without changing the capacity.

  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 hot water storage type hot water supply apparatus according to Embodiment 1 of the present invention. In FIG. 1, a hot water storage type water heater of the present invention includes a hot water storage tank 1 for storing hot water, a water-refrigerant heat exchanger 2 for boiling low temperature water at a lower portion of the hot water storage tank 1 into high temperature water, and a lower portion of the hot water storage tank 1. And a water pump 3 for feeding the low-temperature water to the water-refrigerant heat exchanger 2, and as shown in FIG. 1, the hot water storage tank 1, the water pump 3, and the water-refrigerant heat exchanger 2 are sequentially connected in an annular shape. The low-temperature water in the lower part of the hot water storage tank 1 is generated by the water-refrigerant heat exchanger 2 to generate high-temperature water, and the hot water is stored from above the hot water storage tank 1. Further, a three-way valve 61 is disposed in the flow path from the water refrigerant heat exchanger 2 to the hot water storage tank 1, and the temperature of the hot water generated in the water refrigerant heat exchanger 2 such as when the compressor 6 is started up. When the temperature is not high, the three-way valve 61 is driven to return the hot water discharged from the water-refrigerant heat exchanger 2 to the lower part of the hot water storage tank 1. A tank water supply pipe 4 is connected to the bottom of the hot water storage tank 1 from a water supply source.

  Moreover, the hot water storage type water heater of the present invention uses a heat pump as a heat source. As shown in FIG. 1, the compressor 6 which compresses a refrigerant | coolant, the evaporator 7 which absorbs heat from air | atmosphere, and the decompression device 8 which lowers a refrigerant | coolant, the compressor 6 and a water refrigerant | coolant heat exchanger are included. 2, the decompression device 8 and the evaporator 7 are sequentially connected in an annular shape by a refrigerant pipe, and carbon dioxide is used as the refrigerant flowing through the refrigerant pipe. That is, since it exceeds the critical pressure on the high pressure side, it does not condense even if heat is taken away by water, and hot water can be obtained.

  Further, a hot water supply pipe 10 for discharging water to a hot water supply terminal such as a faucet or a shower and a bath hot water supply pipe 11 for discharging hot water to a bathtub are connected to the top of the hot water storage tank 1. A mist hot water supply pipe 12 that branches and supplies hot water to the mist generator 9 is provided.

  The mist generating device 9 is a device that can enjoy a mist bath in the bathroom, and the user operates the remote controller 13 provided in the bathroom to operate the temperature and operating time of the mist generated from the mist generating device 9. Can be set.

  Between the hot water storage tank 1 and the mist generating device 9, there is provided an electric mixing valve 21 which is a mist mixing means for mixing the water supplied from the water supply source through the mist water supply pipe 14 and the hot water of the hot water storage tank 1. In addition, an electric mixing valve 22 and an electric mixing valve 23 are also provided between the hot water storage tank 1 and the bathtub 30 and between the hot water storage tank 1 and the hot water supply terminal 31, and water from the water supply source and the hot water storage tank 1 are provided. The hot water from can be mixed at an appropriate temperature. Further, a check means is provided upstream of the electric mixing valve 21 that supplies hot water to the mist generator 9. A mechanical check valve 24 is provided between the electric mixing valve 21 and the hot water storage tank 1, and a mechanical check valve 25 is provided between the electric mixing valve 21 and the water supply source. . In this embodiment, a mechanical check valve is used as the check means. However, the present invention is not limited to this, and there is no problem even if any form of check valve is used.

  Further, a thermistor 41 is provided on the downstream side of the electric mixing valve 21, and the electric mixing valve 21 is controlled so that the temperature detected by the thermistor 41 becomes the temperature requested by the mist generating device 9. To do.

  Regarding the hot water storage type water heater configured as described above, operations and actions for performing a mist bath in a bathroom will be described.

First, the user sets the temperature of hot water supplied to the mist generating device 9 with the remote controller 13 installed in the bathroom. Then, by depressing the mist start button, hot water is ejected from the mist generator 9 in a mist form. At this time, the mist temperature is set by the remote controller 13 and transmitted to the microcomputer 51 as the control means. Normally, a stop means for stopping hot water mist injection is provided inside the mist generator 9, and when the mist generator 9 starts, the stop means inside the mist generator 9 is opened to start hot water mist injection. However, the present invention is not limited to this, and a hot water blocking means is provided between the mist generating device 9 and the electric mixing valve 21, and the mist generating device is controlled by controlling the blocking means when the mist operation starts. You may start the mist jet of hot water.

  Next, the microcomputer 51 to which the mist temperature has been transmitted drives and controls the electric mixing valve 21 so that the temperature detected by the thermistor 41 becomes the temperature set by the remote controller 13. Determine the mixing ratio. Since the amount of hot water ejected from the mist generator 9 is relatively small compared to the hot water supply terminal 31, the amount of hot water sent from the hot water storage tank 1 to the mist generator 9 is 0.2 L / min to 2 L / min. It becomes about min.

  In the present embodiment, the mechanical check valve 24 is interposed between the electric mixing valve 51 and the hot water storage tank 1, and the mechanical check valve 25 is interposed between the electric mixing valve 51 and the water supply source. ing. The mechanical check valve of the present embodiment is shown in FIGS. 2 (a) and 2 (b).

  2 (a) and 2 (b), the mechanical check valve of the present embodiment is composed of a valve main body 71, a valve portion 72, and a spring portion 73, and the white arrow in FIG. 2 (a). In general, when hot water is supplied from the hot water storage tank 1 to the mist generator 9, hot water collides with the valve portion 72, but the elastic force of the spring portion causes the valve portion 72 and the valve body 71 to be interposed between them. There is always space and does not obstruct the flow of hot water. In addition, when there is an abnormality such as when water is cut off, for example, as indicated by the black arrow in FIG. 2B, the water pressure from the hot water storage tank side may not be applied, and may flow from the mist generating device 9 side to the hot water storage tank 1 side. is there. However, hot water collides with the valve portion 72, and as shown in FIG. 2 (b), the passage from the mist generating device 9 to the hot water storage tank 1 is blocked by the contact of the valve portion 72 with the valve body 71. Hot water is prevented from flowing from the device 9 into the hot water storage tank 1.

  As described above, the mist operation may not be performed for a long period of time depending on the user's preference. In this case, the bacteria that have propagated in the pipe leading to the mist generator 9 may flow into the hot water storage tank 1. However, it is possible to prevent bacteria from entering the hot water storage tank 1 by providing a check means.

  In the first embodiment, two mechanical check valves 24 and 25 are provided, but only the mechanical check valve 24 may be provided. This is because one of the reasons for providing a mechanical check valve is to prevent hunting of the hot water temperature discharged from the electric mixing valve (hunting in the present invention refers to hot water discharged from the electric mixing valve). Is a phenomenon in which the temperature fluctuates up and down). However, since the mist flow rate is small compared to the hot water supply terminal and the mist operation time is relatively long, the driving speed of the electric mixing valve 21 is relatively slow compared to the electric mixing valve 23 such as a hot water supply terminal. Therefore, the hunting width generated when hot water is supplied from the electric mixing valve 21 to the mist generating device 9 is not larger than the hunting width discharged to the hot water supply terminal or the like. Therefore, even if the mechanical check valve 25 on the water side of the electric mixing valve 21 that supplies hot water to the mist generating device 9 is removed, there is no problem and the cost can be suppressed.

  In addition, since the amount of hot water sent to the mist generator 9 is relatively small as described above, the hot water storage type water heater in the present embodiment branches from the bath hot water supply pipe 11 that is supplied from the hot water storage tank 1 to the bathtub 33. The mist hot water pipe 12 is branched. Therefore, hot water can be sent to the mist generating device 9 with a simple configuration without providing a hot water pipe dedicated to mist from the top of the hot water storage tank 1. Further, instead of branching from the hot water supply pipe 10 and providing a hot water supply pipe dedicated to mist, branching from the hot water supply pipe 11 and providing a hot water supply pipe dedicated to mist enables optimal operation.

Since the operation of the mist generating device 9 is normally performed at the time of bathing, when the user bathes, the hot water filling to the bathtub 31 has already been completed, and the hot water discharge pipe from the hot water storage tank 1 is connected to the mist hot water supply pipe 12 and the bath. Even if the hot water supply pipe 11 is also used, a desired amount of hot water can be secured.

  As described above, by providing the check means as described above, the sewage backflow to the hot water storage tank can be prevented, and a sanitary hot water storage type hot water heater can be provided.

  As described above, the hot water storage type hot water supply apparatus according to the present invention can be applied to a hot water storage type hot water supply apparatus to which a mist generating device can be connected.

The block diagram of the hot water storage type hot water heater in Embodiment 1 of this invention (A) Configuration diagram of mechanical check valve in Embodiment 1 of the present invention (b) Configuration diagram of mechanical check valve in Embodiment 1 of the present invention

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Water refrigerant heat exchanger 3 Water pump 4 Tank water supply pipe 6 Compressor 7 Evaporator 8 Depressurization device 9 Mist generator 10 Hot water supply pipe 11 Bath hot water supply pipe 12 Mist hot water supply pipe 13 Remote control 21 Electric mixing valve 22 Electric type Mixing valve 23 Electric mixing valve 24 Check valve 25 Check valve

Claims (1)

A hot water storage tank for storing hot water, a mist hot water pipe for discharging hot water in an upper portion of the hot water storage tank, a mist water supply pipe for supplying water, a high temperature water supplied from the mist hot water pipe, and the mist water supply pipe Mist mixing means for mixing the supplied water, a mist generating device for jetting hot water mixed in the mist mixing means, a check means for determining the flow direction of hot water in one direction, and the hot water storage A hot water supply pipe for supplying hot water in the upper part of the tank to the bathtub, and a flow path through which the hot water to the mist generator flows , only between the mist mixing means and the mist hot water pipe, A hot water storage type hot water supply apparatus having a check means and the mist hot water supply pipe branched from the bath hot water supply pipe .

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