WO2008038627A1

WO2008038627A1 - Floor heating system

Info

Publication number: WO2008038627A1
Application number: PCT/JP2007/068547
Authority: WO
Inventors: Akihiko Konno
Original assignee: Mitsubishi Plastics, Inc.
Priority date: 2006-09-28
Filing date: 2007-09-25
Publication date: 2008-04-03

Abstract

A floor heating system in which, even if a large number of floor heating panels are used, hot water can be sufficiently circulated in each floor heating panel. Hot water from an outlet opening (9) of a heat source machine (1) flows in the order of hot water piping (10), a header (11), each hot water piping (10), a separate header (22) in each room, each hot water piping (25), each floor heating panel (30), hot water piping (28), a separate header (27) in each room, hot water piping (26), a header (12), hot water piping (13), and an auxiliary pump (14). A portion of return hot water discharged by the auxiliary pump (14) flows in the order of hot water piping (15), a return opening (2), piping (3), a circulation pump (4), a heat exchanger (5), piping (7), the outlet opening (9), and the hot water piping (10). The remaining portion of the return hot water directly flows into the hot water piping (10) via a bypass line (16), merges with hot water from the outlet opening (9), and flows toward the header (11).

Description

Specification

Floor heating system

Field of Invention

The present invention relates to a floor heating system that performs floor heating by circulating hot water from a heat source machine such as a boiler to a floor heating panel.

Background of the Invention

[0002] In a floor heating system, in general, a heat source device having a hot water heating means, a hot water outlet and a hot water return port, and a hot water outlet and return port of the heat source device. A hot water pipe for circulating hot water through the floor, a floor heating panel in which the hot water pipe is arranged in a serpentine shape, and a circulation for circulating hot water to the heat source unit, the hot water pipe, and the floor heating panel It is equipped with a pump, and hot water is circulated to the floor heating panel through its hot water piping.

[0003] As an example of the prior art of this type of floor heating system, a hot water supply and heating system described in Patent Document 1 below, a hot water heating apparatus described in Patent Document 2 below, a floor heating system described in Patent Document 3 below, and the like Is mentioned.

[0004] In Patent Document 1, hot water is supplied to a heat source device by a circulation pump, hot water from the heat source device is supplied to a floor heating panel by a forward line, and hot water from the floor heating panel is supplied to a return line and the circulation pump. And return to the heat source machine. From the return line circulation pump, the floor heating panel side and the forward line communicate with each other through the primary heat transfer pipe of the heat exchanger and the pipe connected to it.

[0005] A three-way valve is provided at a connection portion between the pipe and the forward line. This three-way valve is controlled to be switched alternately between whether the hot water from the heat source flows through the floor heating panel or the heat transfer pipe. The primary side heat transfer tube is connected to the forward line upstream of the return line pump.

[0006] In Patent Document 2, the hot water in the hot water tank is circulated and circulated to the floor heating panel with a circulation pump, and a part of the hot water discharged from the circulation pump is separated and heated by a heat exchanger. Return it to the water tank! [0007] In Patent Document 3, a hot water supply header and a return hot water header are attached to a water heater with a built-in circulation pump, and hot water is circulated from each header to a plurality of floor heating panels via a hot water supply forward pipe and a return pipe. ing.

Patent Document 1: Japanese Patent Laid-Open No. 2002-257365

Patent Document 2: Japanese Patent Laid-Open No. 5-272764

Patent Document 3: Japanese Patent Laid-Open No. 10-170005

[0008] In a floor heating system that circulates hot water from a heat source machine to a floor heating panel via a hot water pipe! / If there are many floor heating panels! /, A circulation pump provided in the heat source machine It is not possible to supply hot water to each floor heating panel by itself! /, So an auxiliary circulation pump may be provided in the hot water piping.

However, even if such an auxiliary circulation pump is provided, the flow rate of water supplied to the floor heating panel cannot be increased sufficiently due to the large flow resistance of the water in the heat source machine itself. is there.

Summary of the Invention

An object of the present invention is to provide a floor heating system that can sufficiently circulate hot water through each floor heating panel even when a large number of floor heating panels are installed.

[0011] The floor heating system of the present invention includes a heat source device having a hot water heating means, a hot water outlet and a hot water return port, and a hot water outlet and return port of the heat source device. A hot water pipe for circulating hot water through the floor, a floor heating panel in which the hot water pipe is arranged in a serpentine shape, a circulation pump for circulating hot water to the heat source unit, the hot water pipe, and the floor heating panel, The hot water pipe is provided with a hot water pipe between the hot water pipe connected to the hot water outlet of the heat source machine and the hot water pipe connected to the return port without passing through the heat source machine. It is characterized by having a bypass line for circulating the air.

[0012] This bypass line is separate from the minimum flow line that may be provided in the heat source device.

[0013] In the present invention, it is preferable that the bypass line is configured so that hot water having a flow rate equal to or higher than the flow rate flowing through the heat source device flows. In particular, the flow rate of the bypass line is equal to or higher than the flow rate of the heat source device and 10 times or less. It is preferable to do so. [0014] In the present invention, a bypass line for circulating hot water without passing through the heat source device is provided between the hot water piping connected to the hot water outlet of the heat source device and the hot water piping connected to the return port. Part of the hot water returned from the floor heating panel is sent through this bypass line to the hot water piping connected to the outlet without passing through the heat source machine. For this reason, the discharge flow rate of the circulation pump in the heat source unit and the flow rate flowing through the bypass line overlap and flow through the hot water piping toward the floor heating panel. Therefore, even if the number of floor heating panels is large, it is possible to sufficiently distribute hot water to each floor heating panel.

[0015] In the present invention, by setting the flow rate passing through the bypass line to be equal to or more than the flow rate passing through the heat source unit, preferably 1 to 10 times, sufficient warm water can be circulated through each floor heating panel. it can.

Brief Description of Drawings

FIG. 1 is a system diagram of a floor heating system according to an embodiment.

Detailed description

[0017] The following is a description of an embodiment of the present invention with reference to the drawings. The following description is an example of an embodiment of the present invention. The present invention is described below unless it exceeds the gist of the present invention. It is not limited at all. FIG. 1 is a system diagram of a floor heating system according to an embodiment.

[0018] In the floor heating system according to this embodiment, a plurality (n) of floor heating panels are laid and installed in each of a plurality (m) of rooms of the building, and the circulation pump It is configured to circulate and circulate hot water from the heat source unit 1 equipped with 4 through the piping and auxiliary circulation pump 14.

[0019] In the heat source unit 1, the return warm water from the return port 2 is circulated in the order of the pipe 3, the circulation pump 4, the heat exchanger 5, the pipe 7, and the outlet 9, and in this heat exchanger 5, It is configured to warm the hot water.

[0020] The pipes 3 and 7 are connected by a minimum flow line 8. This minimum flow line 8 is provided in the heat source unit 1, and even when the circulation pump 4 is operated in a no-load state in which all of the valves 21 described later are closed, the water is supplied to the pipes 3, 7 and the It is intended to circulate through the minimum flow line. The forward header 9 is connected to the forward header 11 via a hot water pipe 10. A header 12 on the return side is installed in parallel with the header 11. The header 12 is connected to the return port 2 via a hot water pipe 13, an auxiliary circulation pump 14 and a hot water pipe 15. A hot water pipe 15 connecting the auxiliary circulation pump 14 and the return port 2 and the above-mentioned hot water pipe 10 are connected via a bypass line 16.

[0022] In this embodiment, the bypass line 16 is a straight pipe or a curved pipe that is at least partially loosely curved. The bypass line 16 is not provided with any valves such as a flow control valve or an on-off valve, and is configured so that the flow resistance of the hot water flowing from the return side hot water pipe 15 to the forward side hot water pipe 10 is small. ing.

In this embodiment, this outward hot water pipe 10 constitutes an outward main line (main pipe). The return side hot water pipes 13 and 15 constitute the return main line.

[0024] The upstream header 11 is connected to the upstream ends of a plurality (m) of each of the hot water pipes 20 on the outward side. The return side header 12 is connected to the downstream ends of the same number (m) of return side hot water pipes 26 as the hot water pipes 20. Usually, the number of rooms in a building (m) is;! ~ 10, preferably 1 ~ 5. In the figure, (1) and (m) are added to the reference numerals 20 and 26 to indicate that there are m hot water pipes 20 and 26, respectively. These hot water pipes 20 and 26 are made of, for example, a copper pipe, an aluminum composite pipe, a cross-linked polyethylene pipe, and the like, and are drawn around the ceiling or the floor of the building. In addition, the material of piping is not limited to this.

[0025] The downstream end of each hot water pipe 20 and the upstream end of each hot water pipe 26 are respectively connected to indoor headers 22 and 27 installed in each room of the building.

[0026] Each room of this building is provided with a plurality (n) of floor heating panels 30 (30 (1) to 30 (n)), and each floor heating panel 30 (1) to 30 ( n) are connected to the indoor headers 22 and 27 through the hot water pipe 25 on the outgoing side and the hot water pipe 28 on the return side, respectively. The number (n) of floor heating panels per room is a force S depending on the size of the room, usually;! ~ 10, preferably 2 ~ 6. These hot water pipes 25 and 28 are not limited to the force S and material made of a crosslinked polyethylene pipe.

[0027] In this embodiment, the hot water pipes 20, 26 are first branch lines (branch pipes), and the pipes 25, 28 are second branch lines (branch pipes). [0028] It should be noted that each hot water pipe 20 is provided with a flow rate adjusting valve 21, and is configured so that the flow rate is adjusted by an indoor remote controller 24 for adjusting the floor heating temperature provided in each room. The same number of indoor remote controllers 24 as the number of rooms (m) are provided.

[0029] In the floor heating system configured as described above, when a floor heating operation switch (not shown) is turned ON, the circulation pump 4, the auxiliary circulation pump 14 and the panner 6 are operated, and the hot water from the forward flow 9 is mainly used. Hot water piping 10, piping 11, each hot water piping 20, first branch piping 20, each indoor header 22, each warm water piping 25, second branch piping, each floor heating panel 30, second branch piping Hot water pipe 28, indoor separate header 27, hot water pipe 26 as first branch pipe 26, header 12, hot water pipe 13 as main pipe, auxiliary circulation pump 14 in this order

[0030] A part of the return warm water discharged from the auxiliary circulation pump 14 is a hot water pipe 1 5, a return port 2, a pipe 3, a circulation pump 4, a heat exchanger 5, a pipe 7, an outgoing port 9 as main pipes. The hot water pipe 10 that is the main pipe flows in this order. The remaining portion of the return warm water discharged from the auxiliary circulation pump 14 flows directly into the hot water pipe 10 that is the main pipe via the bypass line 16, joins the hot water from the outlet 9, and flows toward the header 11.

[0031] In this manner, the auxiliary circulation pump 14 is provided, and the hot water pipes 15 and 10 serving as the main pipes are communicated with each other by the bypass line 16, and the return hot water returned via the hot water pipe 13 serving as the main pipe is supplied. Since a part of the water is circulated directly from the bypass line 16 to the hot water pipe 10 as the main pipe, the hot water flow from the hot water pipe 10 to the header 11 is increased, and a sufficient amount of hot water is circulated to each floor heating panel 30. Is possible.

[0032] When the floor heating panel 30 and the surrounding floor are almost sufficiently warmed and the floor heating system is in a steady operation state, the temperature of the hot water returning to the return port 2 is 55 to It is about 60 ° C. This return hot water is heated by the heat exchanger 5 and is sent out as a hot water of about 70 to 75 ° C from the forward 9.

[0033] Therefore, even when part of the return warm water discharged from the auxiliary circulation pump 14 is merged from the bypass line 16 to the hot water pipe 10 without heating, the floor heating is carried out from the hot water pipe 10 through the header 11 and the like. The temperature of the hot water supplied to the panel 30 is sufficiently high at about 60 to 70 ° C. [0034] If the bypass line 16 is omitted, even if the auxiliary circulation pump 14 is provided, the hot water pipe 10 in which the flow resistance of the heat exchanger 5 in the heat source apparatus 1 is particularly large is large. The flow rate of hot water delivered from the floor cannot be increased, and sufficient hot water cannot be supplied to the floor heating panel in a large floor heating system.

[0035] The inner diameter of the hot water pipes 10, 13 and 15 as the main pipe is normally 16 to 30 mm, and the inner diameter of the hot water pipes 20 and 26 as the first branch pipe is usually 13 to 20 mm. The inner diameters of the hot water pipes 25 and 28, which are branch pipes, are usually 7 to 10 mm. The pipe inner diameter of the bypass line 16 is preferably 1.0 to 2.0 times the pipe inner diameter of the hot water pipes 10, 13 and 15, which are the main pipes. The pipe inner diameter of the minimum flow line is It is preferable that the inner diameter of the hot water pipes 10, 13, and 15, which are the pipes, is 0.

[0036] In the present invention, when the floor heating system is in a steady operation state, the flow rate (volume flow rate) flowing through the no-pass line 16 is the flow rate of the pipe 3, the heat exchanger 5, and the pipe 7 in the heat source unit 1. It is preferable to set the length of the bypass line 16 and the pipe diameter so as to be 1 to 10 times, particularly 1 to 3 times the (heat source flow rate). The inner diameter of the minimum flow line is usually 3 to 10 mm, preferably 3 to 5 mm, and the inner diameter of the bypass line is usually 10 to 30 mm, preferably 15 to 25 mm. The inner diameter of the bypass line is usually 2 to 8 times, preferably 4 to 7 times the inner diameter of the minimum flow line. Further, in order to increase the flow rate of the bypass line 16 in this way, the bypass line 16 is formed of a straight tube or a curved tube that is slightly curved at least partially, and is not provided with a valve or the like that provides a flow resistance. It is desirable. However, a flow rate control valve or an on-off valve may be provided at the branch line between the bypass line 16 or the hot water pipes 15 and 10 as the main pipe and the bypass line 16 (not shown). If a flow control valve is provided on the no-pass line 16, the hot water flow rate of the hot water pipe 15 can be distributed appropriately to the bypass line 16 and the heat source unit 1.

[0037] The location where the circulation pump 4 is provided is not limited to the location shown in FIG. For example, in FIG. 1, the circulation pump 4 may be provided at a location where the auxiliary circulation pump 14 is provided. Even in such a case, the flow rate of the bypass line 16 can be adjusted by providing the flow rate control valve and the on-off valve.

[0038] The floor heating panel 30 is, for example, a plate-shaped piece made of foamed synthetic resin or the like. A groove that is provided on the upper surface of the heat material, a hot water tube is routed in the groove, and a heat transfer sheet such as aluminum and a finishing surface material provided on the upper surface of the base can be used. S, not limited to this.

[0039] As the floor heating panel 30, various types of panels that have already been raised can be used. In the conventional floor heating panel, an area of 0. 8; a 10 m ² approximately, the inner diameter of the tube is about 4~7mm particularly 5 to 6 mm, tube length 10~70m particularly 20~50m Degree. Hot water is circulated at a flow rate of about 0.5 L / min, for example about lL / min, for one floor heating panel. In this case, the water pressure loss of one floor heating panel is 20 to 4 OKPa, for example, about 30KPa.

In the above embodiment, the auxiliary circulation pump 14 is provided in the return-side hot water pipe 13, but the forward-side hot water pipe 10 (however, on the header 11 side from the connection point of the bypass line 16). An auxiliary circulation pump 14 may be installed. However, in this case, negative pressure may occur in the piping of the heat source unit 1 and the heat exchanger 5 upstream of the auxiliary circulation pump 14, so the hot water piping on the return side as shown in the figure It is more preferable to provide in 13. An auxiliary circulation pump may be provided in both hot water pipes 13 and 10, but it is preferable to install only in the hot water pipe 13 because of high cost.

[0041] With the floor heating system of the present invention, it is possible to circulate 25 to 50 L / min of hot water per system, of which 15 to 40 L / min is routed through the bumper line without using a heat source machine. Therefore, the amount of hot water can be circulated through the floor heating panel, and floor heating using a total area of 100 to 400 m ² is possible.

[0042] Although the present invention has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various modifications can be made without departing from the spirit and scope of the invention.

This application is based on a Japanese patent application (Japanese Patent Application No. 2006-2 65018) filed on September 28, 2006, which is incorporated by reference in its entirety.

Claims

The scope of the claims

[1] A heat source device having heating means for warm water, a warm water outlet and a warm water return port,

A hot water pipe for circulating hot water through the heat source machine, connected to the outlet and return port of the hot water of the heat source machine;

A floor heating panel in which the hot water pipes are arranged in a serpentine shape;

A floor heating system comprising a heat pump, a hot water pipe, and a circulation pump for circulating hot water to the floor heating panel,

The hot water pipe is provided with a bypass line for circulating the hot water without passing through the heat source machine between the hot water pipe connected to the hot water outlet of the heat source machine and the hot water pipe connected to the return port. A floor heating system characterized by.

[2] The floor heating system according to claim 1, further comprising a minimum flow line in the heat source unit that communicates the piping on the outlet side and the piping on the return side from the heating means in the heat source unit.

[3] The floor heating system according to claim 1, wherein the circulation pump is provided in the heat source unit.

[4] The floor heating system according to claim 1, wherein a circulation pump is further provided in the hot water pipe before the bypass line connected to the hot water return port of the heat source unit.

[5] The floor heating system according to claim 1, wherein the circulation pump is provided in a hot water pipe in front of the bypass line connected to the hot water return port of the heat source unit.

[6] The hot water pipe has a main pipe and a plurality of branch pipes branched according to the number of rooms to be heated via the header, and the branch pipes are arranged on the floor heating panel. The floor heating system according to claim 1.

[7] Pipe inner diameter of the bypass line 1.0 to 2.0 times the main pipe inner diameter of the hot water pipe

6. The floor heating system according to 6.

[8] The floor heating system according to claim 2, wherein the pipe inner diameter force of the bypass line is 2 to 8 times the inner diameter of the pipe of the minimum flow line.

[9] The warm water flow rate of the no-pass line is 1 to 10 times the hot water flow rate in the heat source unit.

The floor heating system according to any one of claims 1 to 8!