JP2002364866A - Floor heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly start a heating without making a circuit structure for supplying heat complicated in a floor heating system having a plurality of heat radiating parts. SOLUTION: The floor heating system S comprises a plurality of floor heating panels 30A and 30B (heat radiating parts), a heat pump 20 (first heat source), a hot water storage tank 10 (second heat source) and a heating medium circulating circuit 40. The heating medium circulating circuit 40 has an electromagnetic three way valve 43 (selecting means) which selects one of the heat pump 20 and the hot water storage tank 10 to supply heat to the operated floor heating panels 30A and 30B and electromagnetic flow control valves 46A and 46B for limiting an amount of heat supplied to each of the floor heating panels 30A and 30B. A controller 60 of the system S selects the heat pump 20 by the electromagnetic three-way valve 43 when all the floor heating panels 30A and 30B under an operation are in steady states. When one of the floor heating panels 30A and 30B starts its heating operation, the hot water storage tank 10 is selected by the electromagnetic three-way valve 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor heating system constructed with a plurality of heat radiating sections and two heat sources.

[0002]

BACKGROUND OF THE INVENTION Demand for floor heating systems is increasing due to their comfort, and floor heating panels (radiation parts) are laid in a plurality of rooms to heat each room, or one room (for example, a living room). ), The floor heating panel is divided into a plurality of regions (heat radiating portions), and heating is performed for each region.

[0003] On the other hand, the floor heating system has a problem in that it slowly rises to a comfortable heating temperature. The solution is to use a heat source that can immediately supply high-temperature heat (for example, a hot water storage tank) at the start of heating, and when the system is in a steady state, the temperature level of the supplied heat is low but economical. It is conceivable to use another heat source (for example, a heat pump).

However, in a system in which these two heat sources and the plurality of heat radiating units are combined, a heat supply circuit extends from one heat source to each heat radiating unit, and heat is supplied from the other heat source to each heat radiating unit. If the circuit is extended, the circuit configuration becomes complicated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a floor heating system having a plurality of heat radiating portions without complicating the circuit configuration of heat supply without increasing the heating. The point is to get up fast.

[0006]

According to a first aspect of the present invention, there is provided a floor heating system, comprising a plurality of heat radiating sections laid on a floor to perform floor heating by radiating heat, a first heat source, and a first heat source.
A second heat source capable of supplying heat at a higher temperature than the heat source, and a heat supply for selecting one of the first and second heat sources and thermally connecting the selected heat source to all of the radiating units in operation. And a circuit. This heat supply circuit selects the first heat source when all of the heat dissipating parts in operation are in a steady state. On the other hand, when any one of the heat radiating portions is at the time of rising of heating, the second heat source is selected, and if there is a heat radiating portion in a steady state, the amount of heat supply to the heat radiating portion is limited.

In a floor heating system according to a second aspect of the present invention, the heat supply circuit extends from the first and second heat sources and merges with each other. A plurality of heat dissipating part side heat medium outgoing paths branching from the confluence of the medium outgoing path toward each heat dissipating part; a plurality of heat dissipating part side heat medium returning paths extending from each heat dissipating part and merging with each other; By closing one of the two heat-source-side heat medium outward paths and opening the other, the two heat-source-side heat medium return paths branching toward the first and second heat sources from the junction of
Or a selecting means for selecting one of the first and second heat sources by closing one of the two heat source side heat medium return paths and opening the other, and each heat radiation part side heat medium outward path or each heat radiation part side heat A heat supply amount restricting unit that is provided in the medium return path and that restricts the heat supply amount by adjusting the flow of the heat medium.

[0008] The floor heating system according to a third aspect of the present invention is the floor heating system according to the second aspect, further comprising a temperature sensor for detecting the temperature of the heat medium at each heat radiating section side heat medium passage, and thus at the outlet of each heat radiating section. I have. Further, the heat supply amount limiting means is an electromagnetic flow control valve. When the selection target of the selection unit is switched from the first heat source to the second heat source by turning on another heat radiation unit while some of the heat radiation units are operating in a steady state, The electromagnetic flow control valve corresponding to the newly turned on heat radiator is fully opened, and the temperature detected by the temperature sensor corresponding to the above part of the heat radiator is the value before the new heat radiator is turned on. The electromagnetic flow control valves corresponding to some of the heat radiating sections are controlled so as to be maintained as they are.

A floor heating system according to a fourth aspect of the present invention is the floor heating system according to the second aspect, further comprising a temperature sensor for detecting a heat medium temperature at each heat radiating portion side heat medium passage, and thus at an outlet of each heat radiating portion. ing. Further, the heat supply amount limiting means,
It is an electromagnetic on-off valve. Then, when some of the heat radiating units are operated in a steady state and the other heat radiating units are newly turned on, the selection target of the heat source selecting unit is changed from the first heat source to the second heat source.
When switched to the heat source, the electromagnetic on / off valve corresponding to the newly turned on heat release unit is opened, and
The on / off time of the electromagnetic on / off valve corresponding to the part of the heat radiator such that the temperature detected by the temperature sensor corresponding to the part of the heat radiator is on average substantially equal to the value before turning on the new heat radiator. Is adjusted.

It is preferable that the first heat source is a heat pump and the second heat source is a hot water tank for storing hot water (a fifth feature of the present invention).

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows a floor heating system S constructed in a house. Floor heating system S
Is a plurality (only two shown in the figure) of floor heating panels 30
A, 30B (radiator), a hot water storage tank 10 and a heat pump 20 as heat sources for heating, and a heat medium circulating circuit 40 for circulating a heat medium between these heat sources 10, 20 and floor heating panels 30A, 30B ( Heat supply circuit).

The plurality of floor heating panels 30A and 30B are laid in different rooms, but may be laid in different areas of the same room. Each floor heating panel 3
Coil-shaped heat radiation tubes 31A and 31B are provided in 0A and 30B. The heat medium is radiated while flowing through the heat radiation tubes 31A and 31B. In the heat medium,
For example, an antifreeze such as propylene glycol is used. Thereby, freezing in the cold season can be prevented.

Control panels 32A and 32B are attached to the floor heating panels 30A and 30B, respectively. Although not shown, the operation panels 32A and 32B are provided with switches for turning on and off the corresponding floor heating panels 30A and 30B, setting devices for setting a target temperature for heating, and the like.

A water supply pipe 11 is connected to a lower end of the hot water storage tank 10 (second heat source). The tank 10 is filled with water supplied from the water supply pipe 11. An electric heater 12 is accommodated in a lower portion of the hot water storage tank 10. The water in the tank 10 is boiled up by the electric heater 12, and becomes hot water of about 90 ° C., for example. The boiling by the electric heater 12 is desirably performed at midnight every day. As a result, the electricity usage fee can be reduced. Hot water supply pipe 13 extends from the upper end of hot water storage tank 10. The hot water can be supplied to the hot water through the hot water supply pipe 13.

Further, a heat exchanger 14 composed of a heat transfer coil is accommodated above the hot water storage tank 10. The heat medium passing through the heat exchanger 14 receives heat from the hot water.

The heat pump 20 (first heat source) is the same as a well-known one. For example, a refrigerant is circulated in the order of a compressor, a condenser, an expansion valve, and an evaporator, and heat is collected by the evaporator. The heat is dissipated. The heat is transferred to the heat medium passing through the heat exchanger 21 in the heat pump 20.

The heat medium circulation circuit 40 will be described. At both ends of the heat exchanger 14 in the hot water storage tank 10, a tank-side forward path 41 (second
The heat source side heat medium outward path) and the tank side return path 51 (second heat source side heat medium return path) are continuous. A heat pump side outward path 42 (first heat source side heat medium outward path) and a heat pump side return path 52 (first heat source side heat medium return path) are connected to both ends of the heat exchanger 21 in the heat pump 20.

The outward routes 41 and 42 are connected to each other by an electromagnetic three-way valve 43.
They join via a (selection means) and are connected to a common outward path 44. For example, the electromagnetic three-way valve 43 shuts off the forward path 42 when the solenoid is off, and connects the forward paths 41 and 44 to each other. When the solenoid is on, the outward path 41 is shut off and the outward paths 42 and 44 are communicated with each other. On the common outbound route 44,
A heat medium circulation pump 49 is provided.

From the downstream end of the common outward path 44, the floor heating panel 3
Panel-side outbound routes 45A, 45 corresponding to 0A, 30B
B (radiating section side heat medium outward path) branches and extends. Electromagnetic flow control valves 46A, 46B
(Heat supply amount limiting means) is provided. Each outbound 45
A and 45B are connected to the upstream ends of the radiator tubes 31A and 31B of the corresponding floor heating panels 30A and 30B.

The radiator pipe 3 of each floor heating panel 30A, 30B
Panel-side return trips 53A, 53B from the downstream ends of 1A, 31B
(A heat radiating section side heat medium return path) extends. Each return trip 53A, 5
3B include temperature sensors 54A and 54A for detecting the temperature of the heat medium.
4B is provided. The plurality of return paths 53A and 53B merge with each other and are connected to a common return path 55. The return paths 51 and 52 are branched from the downstream end of the common return path 55.

The floor heating system S further includes a controller 60 for controlling the whole. Hereinafter, the controller 6
The floor heating control method using 0 will be described. When the user issues an operation instruction for one floor heating panel 30A using the operation panel 32A, the ON information is input to the controller 60. Upon receiving this, the controller 60 first shuts off the outward path 42 by the electromagnetic three-way valve 43 and
1, 44 are communicated with each other (the hot water tank 10 is selected as a heat source). Further, the electromagnetic flow control valve 46A corresponding to the floor heating panel 30A turned on is fully opened, while the electromagnetic flow control valve 4 corresponding to the other floor heating panel 30B is opened.
6B is closed. Then, the heat medium circulation pump 49 is driven.

As a result, the heat medium is supplied to the heat exchanger 14 of the hot water storage tank 10, the outgoing routes 41, 44, 45A, the floor heating panel 30.
A circulates in the order of the heat radiating pipe 31A and the return paths 53A, 55, 51 (the hot water storage tank 10 and the floor heating panel 30A are thermally connected). This heat medium receives a large amount of heat from the hot water in the hot water storage tank 10 in the process of passing through the heat exchanger 14 and becomes high in temperature. Then, heat is dissipated in the process of passing through the heat radiating tube 31A.
Thus, the floor heating panel 30A can be quickly warmed, and heating can be started up in a short time.

After a lapse of a predetermined time from the start of operation of the floor heating panel 30A, or when the room temperature or the floor temperature of the room in which the floor heating panel 30A is laid approaches a target temperature set by the operation panel 32A by a predetermined amount. (For example, when the temperature becomes lower by 3 ° C. than the target temperature), the controller 60 considers that the heating start-up is completed. Then, the outward path 4 is controlled by the electromagnetic three-way valve 43.
1 is cut off and the outgoing routes 42 and 44 are communicated with each other (the selection target is switched from the hot water tank 10 to the heat pump 20). Then, the heat pump 20 is driven. Thus, the heat medium is supplied to the heat exchanger 21 of the heat pump 20,
Outgoing routes 42, 44, 45A, radiator tube 31A, return route 53A,
Circulation is performed in the order of 55 and 52 (the heat pump 20 and the floor heating panel 30A are thermally connected). This heat medium receives heat from the heat pump 20 in the process of passing through the heat exchanger 21 and radiates heat in the process of passing through the radiator tube 31A. Further, the controller 60 adjusts the flow rate of the heat medium by the electromagnetic flow rate control valve 46A so that the floor temperature or the room temperature becomes the target temperature. Thus, the floor heating panel 30A can be maintained in a steady state by using the heat pump 20 which is excellent in economy. The output of the heat pump 50 may be adjusted instead of or in addition to adjusting the flow rate of the heat medium.

Here, it is assumed that the user gives an operation instruction for another floor heating panel 30B while the floor heating panel 30A is operating in a steady state. The controller 60 that has received the ON information firstly operates the floor heating panel 3 in the steady state.
The return temperature (outlet temperature) of the heating medium from 0A
The data is read by A and stored in a built-in memory. Then, the heat pump 20 is stopped, and the hot water tank 10 is replaced with the newly turned on floor heating panel 30B as well as the floor heating panel 30A already operating in a steady state.
Is also selected as a heat source.

That is, the forward path 4 is controlled by the electromagnetic three-way valve 43.
2 is cut off and the outgoing routes 41 and 44 are communicated with each other. Further, the electromagnetic flow control valve 46B is fully opened. As a result, after the heat medium is heated to a high temperature in the heat exchanger 14 of the hot water storage tank 10, the heat medium is passed through the outward paths 41 and 44 and the two outward paths 45A
It is diverted to 45B. The heat medium flowing into the outward path 45B is
The heat is guided by the heat radiating tube 31B to radiate heat. As a result, the heating of the floor heating panel 30B can be started up quickly and brought into a steady state in a short time. The heat medium that has been radiated by the radiator tube 31B is sent to the return path 53B.

On the other hand, the heat medium flowing into the outward path 45A is guided to the radiator tube 31A to radiate heat, and then sent to the return path 53A. At this time, the controller 60 controls the electromagnetic flow rate control so that the temperature detected by the temperature sensor 54A in the return path 53A (the temperature of the heat medium at the outlet of the floor heating panel 30A) is maintained at the temperature stored in the memory. The flow rate of the heat medium is limited by the valve 46A. Thereby, the floor heating panel 30
The steady state of A can be maintained, and the heating temperature can be prevented from rising.

The heat medium after passing through each of the return paths 53A and 53B joins in the return path 55, and passes through the return path 51, where the heat exchanger 14
Is returned to. Thus, the hot water storage tank 10 and the floor heating panel 30
A heat medium is circulated between A and 30B (hot water storage tank 10 and all operating floor heating panels 30A and 30B are thermally connected).

Then, the newly turned on floor heating panel 3
When the heating start-up of 0B is completed (ie, when all the floor heating panels 30A and 30B in operation are in a steady state), the controller 60 shuts off the outward path 41 by the electromagnetic three-way valve 43 and simultaneously transmits the outward paths 42 and 44. The heat pump 20 is restarted by communicating the two. by this,
After the heat medium is heated in the heat exchanger 21, the outgoing routes 42, 44
, The flow is divided into two (plural) outgoing routes 45A and 45B. These divided heat mediums are respectively radiating tubes 31A, 3A.
After radiating heat at 1B, the return path 55 passes through return paths 53A and 53B.
To join. Further, it is returned to the heat exchanger 21 via the return path 52. Thus, the heat pump 20 and the floor heating panel 3
The heat medium is circulated between the heat pump 20A and the floor heating panels 30A and 30B (the heat pump 20 and all the floor heating panels 30A and 30B in operation are thermally connected).

The controller 60 maintains a steady state by controlling the temperature of each floor heating panel 30A, 30B. That is, the heating medium flow rate in the outward path 45A is adjusted by the electromagnetic flow rate control valve 46A so that the heating temperature by the floor heating panel 30A becomes the target temperature set by the operation panel 32A, and the heating temperature by the floor heating panel 30B is controlled. The flow rate of the heat medium in the outward path 45B is adjusted by the electromagnetic flow rate control valve 46B so that the target temperature set in the panel 32B is attained.

As described above, according to the floor heating system S, when there is at least one floor heating panel in the heating start-up state, the operation is performed regardless of whether the other floor heating panels are in the start-up state or the steady state. The hot water tank 10 is used as a heat source uniformly for all the inside floor heating panels 30A and 30B, and the heat pump 20 is used as a heat source only when all the operating floor heating panels 30A and 30B are in a steady state. Therefore, a simple configuration such as the heat medium circulation circuit 40 can be employed as the heat supply circuit.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the first
About the structure which overlaps with embodiment, the same code | symbol is attached | subjected to drawing and description is abbreviate | omitted.

As shown in FIG. 2, the difference between the floor heating system S 'of the second embodiment and the above-mentioned system S is that the electromagnetic flow control valves 46A, 46
6B is that electromagnetic switching valves 46A 'and 46B' are provided instead of 6B. The solenoid on-off valves 46A 'and 46B' are closed, for example, when the solenoid is off, and open when the solenoid is on.

In the floor heating system S ', when a part of the floor heating panel 30A is operated in a steady state and another floor heating panel 30B is newly turned on, the controller 60 is turned on.
Switches the heat source from the heat pump 20 to the hot water storage tank 10 by the electromagnetic three-way valve 43. Also, the solenoid on-off valve 46B '
Is turned on by turning on. Thus, after the heat medium is heated to a high temperature in the hot water storage tank 10, the heat medium is guided to the floor heating panel 30B to radiate heat, and the floor heating panel 30B can be quickly started.

On the other hand, with respect to the electromagnetic on-off valve 46A ', the temperature detected by the temperature sensor 54A is averaged to the floor heating panel 30A.
The on / off time is adjusted so that the value is substantially equal to the value before B is turned on. Specifically, first, the electromagnetic on-off valve 46
A 'is turned on and off every two minutes, for example, and the duty ratio is set to 50%. Then, an average of the detected temperatures of the temperature sensor 54A while the valve 46A 'is on is taken. When the average value is higher than the temperature detected by the temperature sensor 54A before the floor heating panel 30B is turned on, the duty ratio is reduced (the off time is lengthened) according to the difference. Conversely, when the average value is lower than the detected temperature before the floor heating panel 30B is turned on, the duty ratio is increased (the off time is shortened) according to the difference. Thereby, it is possible to prevent the floor heating panel 30A from deviating from the steady state.

When the start-up of the floor heating panel 30B is completed (when all the operating floor heating panels 30A and 30B are in a steady state), the controller 60 operates the electromagnetic three-way valve 4
3, the heat source is returned from the hot-water storage tank 10 to the heat pump 20, and the duty ratio of the electromagnetic on-off valves 46A 'and 46B' is adjusted.
The steady state of 0A and 30B is maintained.

The present invention is not limited to the above embodiment, and various modifications are possible. For example, in the first and second embodiments, one floor heating panel as a whole serves as one heat radiating unit. However, one floor heating panel is divided into a plurality of regions, and a radiating pipe is provided for each region. Each area may be a single heat radiating section. Three outbound trips 41, 4
Instead of, or in addition to, providing the electromagnetic three-way valve 43 at the connection between the two return ports 51, 52, 55, the electromagnetic three-way valve (one of the two heat source side return paths is closed and the other is connected to the three return paths 51, 52, 55) Close selection means) may be provided. The selection means may be replaced with the electromagnetic three-way valve, instead of each forward path 41, 42 or each return path 5
Opening / closing valves provided at the first and second valves 52 may be used. Electromagnetic flow control valves 46A, 46B and electromagnetic on-off valves 46A ', 46B'
May be provided on the panel-side return paths 53A and 53B.

[0037]

As described above, according to the first aspect of the present invention, in a floor heating system having a plurality of heat radiating portions, heating is quickly started without complicating the circuit configuration of heat supply. After the rise, the steady state can be reliably maintained. According to the second feature of the present invention, the heat supply circuit can be reliably made simple. According to the third aspect of the present invention, the steady state can be reliably maintained by adjusting the flow rate of the heat medium with the electromagnetic flow control valve for the heat radiating portion already in the steady state. According to the fourth feature of the present invention, the steady state can be reliably maintained by adjusting the on / off time of the electromagnetic on-off valve for the heat radiating portion already in the steady state. According to a fifth aspect of the present invention,
By using the hot water in the hot water storage tank, heating can be started quickly and reliably, and in a steady state, the economic efficiency can be improved by using a heat pump.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a floor heating system according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a floor heating system according to a second embodiment of the present invention.

[Description of Signs] S, S 'Floor heating system 10 Hot water tank (second heat source) 20 Heat pump (first heat source) 30A, 30B Floor heating panel (radiator) 40 Heat medium circulation circuit (heat supply circuit) 41 Tank side Outward path (second heat source side heat medium outward path) 42 Heat pump side outward path (first heat source side heat medium outward path) 43 Electromagnetic three-way valve (selection means) 44 Common outward path (merging section) 45A, 45B Panel side outward path (radiation section side heat medium) Outgoing path) 46A, 46B Electromagnetic flow control valve (heat supply amount restricting means) 46A ', 46B' Electromagnetic open / close valve (heat supply amount restricting means) 49 Heat medium circulation pump 51 Tank side return path (second heat source side heat medium return path) 52 Heat pump side return path (first heat source side heat medium return path) 53A, 53B Panel side return path (radiation section side heat medium return path) 54A, 54B Temperature sensor 55 Common return path (merging section) 60 Controller

Claims (5)

[Claims] 1. A plurality of radiators laid on the floor to radiate heat to perform floor heating, a first heat source, a second heat source capable of supplying heat at a higher temperature than the first heat source, Second
A heat supply circuit for selecting one of the heat sources and thermally connecting the selected heat source to all of the radiating units in operation;
This heat supply circuit selects the first heat source when all of the heat dissipating sections in operation are in a steady state, and selects the second heat source when any one of the heat dissipating sections is at the time of heating up. A floor heating system characterized by limiting the amount of heat supplied to the radiating section if the radiating section is in a steady state. 2. The heat supply circuit extends from the first and second heat sources and joins each other with two heat source-side heat medium outward paths, and from a junction of the heat source-side heat medium outward paths to each heat radiating section. A plurality of radiating section-side heat medium outgoing paths, a plurality of radiating section-side heat medium returning paths extending from the radiating sections and merging with each other, and from the junction of the radiating section-side heat medium returning paths to the first and second heat sources The two heat-source-side heat medium return paths, and one of the two heat-source-side heat medium return paths is closed and the other is opened, or one of the two heat-source-side heat medium return paths is closed and the other is opened to open the second path. 1, one of the second heat sources
And a heat supply amount limiting unit provided in each heat radiating section side heat medium outward path or each heat radiating section side heat medium return path, and restricting the heat supply amount by adjusting the flow of the heat medium. The floor heating system according to claim 1, wherein the floor heating system is operated. 3. A heat sensor for detecting a heat medium temperature at each heat radiating portion side heat medium passage, and thus at an outlet of each heat radiating portion, wherein the heat supply amount restricting means is an electromagnetic flow control valve. When another heat radiator is newly turned on while the heat radiator is operating in a steady state, the selection target of the selection means is switched from the first heat source to the second heat source, and the heat radiator is newly turned on. While the electromagnetic flow control valve corresponding to the heat radiating part is fully opened, the detection temperature of the temperature sensor corresponding to the part of the heat radiating part is maintained at the value before turning on the new heat radiating part, The floor heating system according to claim 2, wherein an electromagnetic flow control valve corresponding to the part of the radiator is controlled. 4. A heat sensor according to claim 1, further comprising a temperature sensor for detecting a heat medium temperature at each heat radiating portion side heat medium passage, and furthermore, a heat medium temperature at an outlet of each heat radiating portion. When the selection unit of the heat source selection unit is switched from the first heat source to the second heat source by another heat radiation unit being newly turned on while the unit is operating in a steady state, the heat source is newly turned on. The electromagnetic on / off valve corresponding to the heat radiating part is opened, and the detection temperature of the temperature sensor corresponding to the above part of the heat radiating part is set to be substantially equal to the value before turning on the new heat radiating part on average. 3. The floor heating system according to claim 2, wherein an on / off time of an electromagnetic on / off valve corresponding to the part of the radiator is adjusted. 5. The floor heating system according to claim 1, wherein the first heat source is a heat pump, and the second heat source is a hot water storage tank for storing hot water.