JP2012132572A - Hot water supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water supply system by which a footprint can be reduced by making a hot water supply tank unnecessary and hot water can be instantly fed by a simple construction.SOLUTION: The hot water supply system 1 has a plurality of heat pumps 2 for heating hot water and hot water supply pipe 3 for supplying the heated hot water and sending the same a hot water supply terminal. A hot water storing tank for storing the heated hot water is not arranged in the hot water supply sides of the plurality of the heat pumps 2. The hot water supply pipe 3 includes in a plurality of first hot water supply pipes 4 for supplying the heated hot water and the second hot water supply pipe 5 for sending the heated hot water to the hot water supply terminal. A hot water buffer pipe 6 having larger diameter than that of the hot water supply pipe 3 is arranged between the plurality of first hot water supply pipes 4 and the second hot water supply pipe 5. The hot water is heated by the heat pumps 2, and the heated hot water is discharged from the hot water supply opening through the first hot water supply pipe 4, the hot water supply buffer pipe 6, and the second hot water supply pipe 5 when the hot water supply opening of the hot water supply terminal is opened.

Description

  The present invention relates to a hot water supply system capable of instant hot water at a hot spring terminal.

  Conventionally, there is a hot water supply system that includes a heat pump that boils hot water and a hot water storage tank that stores hot water boiled by the heat pump, and sends hot water stored in the hot water storage tank to a hot water outlet terminal via a hot water supply pipe (for example, Patent Document 1).

JP 2008-267708 A

  The hot water supply system as described above may be used in a store such as a restaurant having a limited site area in a building or the like. At that time, in the hot water supply system used in the store, when the hot water, that is, the hot water outlet of the hot water outlet terminal is opened, the hot water at a predetermined temperature is required to be immediately discharged from the hot water outlet. For this reason, the hot water storage tank is arranged as close as possible to the hot water outlet terminal. However, since the hot water storage tank is generally relatively large in size, the installation area of the hot water supply system may become large and installation may be difficult. Some hot water is circulated between the hot water storage tank and the hot water terminal for instant hot water. However, even if the configuration is adopted, the above-mentioned problem is not solved and the configuration becomes complicated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a hot water supply system that does not require a hot water storage tank, requires only a small installation area, and can be immediately heated with a simple configuration. And

  The hot water supply system of the present invention includes a heat source device for boiling hot water, a hot water supply pipe for discharging hot water boiled by the heat source device and sending it to a hot water outlet terminal, a hot water supply side of the heat source device, and the hot water supply pipe And a hot water supply buffer pipe having a larger diameter.

  In this hot water supply system, hot water temperature detecting means for detecting the temperature of hot water discharged from the heat source unit, a first path for sending hot water discharged from the heat source unit to the hot water terminal, and hot water discharged from the heat source unit. It is preferable to further comprise a switching means for switching between the second path for returning the hot water to the water supply side of the heat source machine, and a control means for controlling the hot water temperature detecting means and the switching means.

  In this hot water supply system, it is preferable that a plurality of the heat source devices are connected.

  In this hot water supply system, the hot water supply buffer pipe is composed of a plurality of independent individual pipes into which hot water discharged from the plurality of heat source devices is flowed, and a merging pipe for joining the plurality of individual pipes on the outlet side. It is preferable to have.

  According to the hot water supply system according to the present invention, the hot water boiled by the heat source machine is sent to the hot water terminal through the hot water supply pipe and the hot water supply buffer pipe even if the hot water storage tank is not provided on the outlet side of the heat source machine. As a result, the hot water can be immediately poured into the hot spring terminal. Moreover, since the installation area of the hot water supply system is reduced, the installation is not restricted.

The top view which shows the structure of the hot water supply system which concerns on one Embodiment of this invention. The perspective view which shows the structure of the hot water supply buffer piping with which the same system is provided. The top view which shows the structure of the modification of the system. The perspective view which shows the structure of the modification of the hot water supply buffer piping.

  Hereinafter, a hot water supply system according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. The hot water supply system 1 includes a plurality of heat pumps (heat source devices) 2 that boil hot water, and a hot water supply pipe 3 that discharges the hot water boiled by the plurality of heat pumps 2 and sends the hot water to a hot water terminal (not shown). . Further, in the hot water supply system 1, a hot water storage tank that stores boiling hot water is not provided on the hot water outlet side of the plurality of heat pumps 2. The hot water supply pipe 3 includes a plurality of first hot water supply pipes 4 for discharging hot water boiled by the plurality of heat pumps 2 and a second hot water supply pipe 5 for sending the heated hot water to a hot water outlet terminal. A hot water supply buffer pipe 6 having a larger diameter than the hot water supply pipe 3 is provided between the plurality of first hot water supply pipes 4 and the second hot water supply pipes 5. When the hot water outlet of the hot water outlet is opened, the hot water is boiled by the heat pump 2, and the boiled hot water passes through the first hot water supply pipe 4, the hot water supply buffer pipe 6, and the second hot water supply pipe 5, Issued by. The diameter of the hot water supply pipe 3 is equal to the diameter of each of the first hot water supply pipe 4 and the second hot water supply pipe 5. The arrows in the figure indicate the flow of hot water.

  The plurality of heat pumps 2 are connected to a water supply pipe 7 for water supply and a plurality of first hot water supply pipes 4 and operate when the hot water outlet of the hot water outlet terminal is opened. A plurality of heat pumps 2 are preferably connected. Thereby, the boiling capability of the hot water as the whole hot water supply system 1 improves. In this case, hot water having a predetermined temperature is instantaneously discharged from the hot water supply port as compared with the case where one heat pump 2 is provided in the hot water supply system 1.

  The hot water supply pipe 3, that is, the plurality of first hot water supply pipes 4 and the second hot water supply pipes 5 are provided on the outlet side of the heat pump 2. The upstream ends of the plurality of first hot water supply pipes 4 are respectively connected to the heat pump 2. The downstream ends of the plurality of first hot water supply pipes 4 are respectively connected to the hot water supply buffer pipes 6. Thereby, the plurality of first hot water supply pipes 4 are joined by the hot water supply buffer pipe 6. Instead of the first hot water supply pipe 4, for example, a hot water supply pipe provided in the heat pump 2 for discharging hot water that has been boiled can be used. Thereby, the heat pump 2 and the hot water supply buffer piping 4 are provided close to each other. Therefore, the installation area of the hot water supply system 1 is reduced. In addition, when the reduction of the installation area of the hot water supply system 1 is further required, the heat pump 2 and the hot water supply buffer pipe 6 may be directly connected.

  The upstream end of the second hot water supply pipe 5 is connected to the hot water supply buffer pipe 6. The downstream end of the second hot water supply pipe 5 is connected to a hot water outlet terminal.

The hot water supply buffer pipe 6 is formed in a cylindrical shape. On the side of the hot water buffer pipe 6,
A plurality of hot water inlets 61 corresponding to the number of the plurality of heat pumps 2 are provided sufficiently apart from each other. The plurality of hot water inlets 61 are respectively connected to the downstream ends of the plurality of first hot water supply pipes 4. Thereby, the plurality of first hot water supply pipes 4 are joined by the hot water supply buffer pipe 6. A hot water outlet 62 is provided on the bottom surface (downstream end) on the downstream side of the hot water supply buffer pipe 6. The hot water outlet 62 is connected to the upstream end of the second hot water supply pipe 5. Thereby, hot water boiled by the plurality of heat pumps 2 passes through the first hot water supply pipe 4, flows into the hot water supply buffer pipe 6 from the hot water inlet 61, and flows out from the hot water outlet 62 to the second hot water supply pipe 5.

  Since the diameter of the hot water supply buffer pipe 4 is larger than the diameter of each of the first hot water supply pipe 4 and the second hot water supply pipe 5, it is larger than the case where the hot water supply buffer pipe 4 is not provided on the outlet side of the plurality of heat pumps 2. Of hot water stays on the outlet side of the plurality of heat pumps 2. For this reason, the temperature of the hot water staying on the outlet side of the plurality of heat pumps 2 is less likely to be cooled than when the hot water supply buffer pipe 4 is not provided. Thereby, the temperature difference between the hot water boiled by the plurality of heat pumps 2 and the hot water staying on the outlet side of the plurality of heat pumps 2 when the hot water is boiled is reduced. Therefore, the temperature fluctuation of the hot water discharged from the hot water outlet of the hot water terminal is suppressed.

  In addition, since the plurality of hot water inlets 61 are provided sufficiently apart from each other, adverse effects on the plurality of heat pumps 2 due to the presence / absence of operation of each heat pump 2 or variations in characteristics of the plurality of heat pumps 2 are prevented. As this adverse effect, for example, the hot water of one heat pump 2 having a low boiling capacity is inhibited by the hot water of another heat pump 2 having a high boiling capacity.

  The water supply pipe 7 is provided on the water supply side of the heat pump 2. The downstream ends of the branched water supply pipes 7 are respectively connected to the plurality of heat pumps 2.

  The operation of the hot water supply system 1 configured as described above will be described. When the hot water outlet of the hot water outlet terminal is opened, water is supplied to the plurality of heat pumps 2 through the water supply pipe 7 by the supply water pressure. The plurality of heat pumps 2 boil the supplied water. Thereby, hot water is boiled. Hot water boiled by the plurality of heat pumps 2 flows into the hot water supply buffer pipe 6 through the first hot water supply pipe 4. The hot water that has flowed into the hot water supply buffer pipe 6 is mixed with the hot water remaining in the hot water supply buffer pipe 6 immediately before the hot water is boiled by the heat pump 2, flows out to the second hot water supply pipe 5, and is sent to the hot water outlet terminal. The In this way, hot water of a predetermined temperature is instantaneously discharged from the hot water supply port.

  As described above, according to the hot water supply system 1 according to the present embodiment, even if the hot water storage tank is not provided on the outlet side of the plurality of heat pumps 2, It passes through the buffer pipe 6 and is sent to the hot water terminal. Therefore, hot water can be immediately poured into the hot water terminal, and the installation area of the hot water supply system 1 is reduced, and the installation is not restricted.

  Next, a modification of the hot water supply system 1 will be described with reference to FIG. Below, the hot water supply system 1a which concerns on a modification is demonstrated about a different point from the said hot water supply system 1. FIG. The hot water supply system 1a includes a temperature sensor (hot water temperature detecting means) 8 for detecting the temperature of hot water discharged from the heat pump 2, a switching means 9 for switching the path of hot water discharged from the heat pump 2, a temperature sensor 8 and a switching means. And control means 10 for controlling 9. The temperature sensor 8 and the switching means 9 are provided in order in the second hot water supply pipe 5 from the upstream side. A pipe 11 that connects the switching means 9 and the water supply pipe 7 is provided. The route of hot water discharged from the heat pump 2 includes a first route for sending hot water discharged from the heat pump 2 to a hot water terminal, and a second route for returning hot water discharged from the heat pump 2 to the water supply side of the heat pump 2. And including. Specifically, the first route is a route through which the hot water discharged from the heat pump 2 is sent to the hot water terminal through the first hot water supply pipe, the hot water supply buffer pipe 6, and the second hot water supply pipe 5. Show. In the second path, the hot water discharged from the heat pump 2 passes through the first hot water supply pipe 4, the hot water supply buffer pipe 6, the second hot water supply pipe 5, the pipe 11, and the water supply pipe 7 to the water supply side of the heat pump 2. Indicates the route returned to

  The temperature sensor 8 detects the temperature of hot water in the second hot water supply pipe 5. The switching means 9 comprises a three-way valve, for example, and switches the hot water path discharged from the heat pump 2 to the first path or the second path. The control means 10 comprises, for example, a CPU (Central Processing Unit) and a memory, or a microcomputer, acquires the temperature of the hot water detected by the temperature sensor 8 from the temperature sensor 8, and switches based on the acquired temperature of the hot water. The means 9 is controlled. Specifically, the control means 10 compares the hot water temperature acquired from the temperature sensor 8 with a predetermined temperature, and when the acquired hot water temperature reaches the predetermined temperature, The switching means 9 is switched so that the hot water route becomes the first route. When the temperature of the hot water obtained does not reach the predetermined temperature, the control means 10 switches the switching means 9 so that the path of the hot water discharged from the heat pump 2 becomes the second path. The predetermined temperature is determined by previously storing the temperature desired by the user in the control means 10.

  The operation of the hot water supply system 1a configured as described above will be described. When the hot water outlet of the tap terminal is opened, the hot water boiled water is supplied to the heat pump 2 just after the hot water is supplied to the heat pump 2 and immediately before the hot water is boiled by the heat pump 2, as in the hot water supply system 1. 6 is mixed with the hot water remaining in the water 6 and flows out to the second hot water supply pipe 5. Here, when the temperature of the hot water detected by the temperature sensor 8 has reached the predetermined temperature, the hot water flowing out to the second hot water supply pipe 5 is sent to the hot water terminal through the first path. When the temperature of the hot water detected by the temperature sensor 8 does not reach the predetermined temperature, the hot water that has flowed out to the second hot water supply pipe 5 is returned to the water supply side of the heat pump 2 through the second path.

  According to such a hot water supply system 1a, as in the above embodiment, the hot water can be immediately heated and the installation area is reduced. Moreover, since the hot water discharged from the heat pump 2 is returned to the water supply side of the heat pump 2 until it reaches a predetermined temperature, the hot water at the predetermined temperature is stably discharged from the hot water outlet of the hot water outlet terminal.

  Next, a modified example of the hot water supply buffer pipe 6 will be described with reference to FIG. The hot water supply buffer pipe 6 according to the modified example includes a plurality of independent individual pipes 6a into which hot water discharged from the plurality of heat pumps 2 flows, a joining pipe 6b that joins the plurality of individual pipes 6a on the outlet terminal side, Have The individual pipe 6a is formed in a quadrangular prism shape. The shape of the individual pipe 6a is not limited to a quadrangular prism shape, and may be, for example, a cylindrical shape. A hot water inlet 61 through which hot water discharged from the heat pump 2 flows is provided on the side surface of the individual pipe 6a. The number of individual pipes 6a is not particularly limited as long as it is equal to or greater than the number of heat pumps 2. The junction pipe 6b is formed so that the cross section gradually decreases from the upstream side toward the downstream side. The upstream end of the joining pipe 6b is connected to the bottom surface (downstream end) on the downstream side of the plurality of individual pipes 6a so as to join the plurality of individual pipes 6a. The downstream end of the junction pipe 6 b is connected to the upstream end of the second hot water supply pipe 5.

  According to such a hot water supply buffer pipe 6, the hot water discharged from the plurality of heat pumps 2 flows into the plurality of individual pipes 6a that are independent from each other. Therefore, adverse effects on the plurality of heat pumps 2 are sufficiently prevented.

  The present invention is not limited to the configuration of the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the temperature sensor 8 may be provided in the hot water supply buffer pipe 6. Moreover, in the hot water supply system 1, the temperature sensor 8, the switching means 9, and the control means 10 may be provided, and in the hot water supply system 1a, a plurality of heat pumps 2 may be provided. Further, instead of the heat pump 2, a combustion water heater or other water heaters may be used.

1 Hot water supply system 2 Heat pump (heat source machine)
3 Hot water supply pipe 4 First hot water supply pipe 5 Second hot water supply pipe 6 Hot water supply buffer pipe 6a Individual pipe 6b Junction pipe 8 Temperature sensor (hot water temperature detection means)
9 Switching means 10 Control means

Claims (4)

A heat source machine for boiling water,
A hot water supply pipe for discharging hot water boiled by the heat source machine and sending it to a hot water terminal;
A hot water supply system comprising: a hot water supply buffer pipe provided on a hot water outlet side of the heat source machine and having a larger diameter than the hot water supply pipe. Hot water temperature detecting means for detecting the temperature of hot water discharged from the heat source machine;
Switching means for switching between a first path for sending hot water discharged from the heat source machine to the hot water terminal and a second path for returning hot water discharged from the heat source machine to the water supply side of the heat source machine;
The hot water supply system according to claim 1, further comprising control means for controlling the hot water temperature detecting means and the switching means.   The hot water supply system according to claim 1 or 2, wherein a plurality of the heat source devices are connected. The hot water buffer pipe is
A plurality of independent pipes into which hot water discharged from the plurality of heat source units is flowed, and
The hot water supply system according to claim 3, further comprising a merging pipe that joins the plurality of individual pipes on the outlet terminal side.

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