JPH11316027A - Floor heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor heating device wherein abnormal rising and falling of internal pressure is prevented and internal pressure is kept stably for protecting each part. SOLUTION: Related to a buffer tank 7 which is a buffering device M, a supply line 5 and a discharge line 6 are connected to the middle of a main line 4 connecting between a heating medium supply source 3 and a heating medium liquid circulation piping 2. The buffering device is provided with pressure detecting means A and B for detecting internal pressure of the main line, and comprises a supply control part 9 wherein a control valve 8 is opened when the internal pressure is equal to or above an upper limit set value, it is opened when the internal pressure is less than the upper limit set value, and it is closed when the internal pressure is less than the upper limit set value, and a discharge control part 11 wherein a pump 10 is operated when the internal pressure is equal to or less than a lower limit set value while it is stopped when the internal pressure falls beyond the lower limit set value. Further, an abnormal low-pressure detecting means C for detecting internal pressure and an abnormality control part 12 wherein a pump is stopped when the internal pressure falls to or beyond an abnormal set value for issuing abnormality alert are provided, with the abnormality set value set below the lower limit set value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor heating apparatus for heating a heating medium by circulating a heating medium through a heating medium circulating pipe laid on a floor of a house or the like.

[0002]

2. Description of the Related Art Conventionally, there is known a floor heating apparatus for heating by circulating a heat medium liquid heated by a boiler by a pump through a heat medium liquid circulation pipe formed of synthetic rubber or the like laid on the floor. . In this case, the heat medium liquid undergoes heat exchange when passing through the heat medium liquid circulation pipe, and is returned to the boiler and heated again.

[0003]

However, in the above-mentioned conventional floor heating device, when the heating medium is heated, the heating medium expands itself, so that the main line and the heating medium for transferring the heating medium are heated. The internal pressure of the liquid circulation pipe rises,
There is a possibility that the pump may be overloaded, the heat medium liquid circulating pipe may be ruptured due to expansion of the heat medium liquid circulating pipe, or the floor may be cracked.

The present invention has been made to solve the problems existing in the prior art, and prevents an abnormal rise and fall of the internal pressure in the main line and the heat medium liquid circulating pipe, and always keeps the internal pressure stable. It is an object of the present invention to provide a floor heating device capable of maintaining the above-mentioned condition and protecting each part.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a floor heating device for heating by circulating a heated heat medium supplied from a heat medium supply source through a heat medium liquid circulation pipe laid on a floor. A buffer device (M) having a buffer tank (7) is provided.The buffer tank is provided in the middle of a main line (4) connecting a heat medium supply source (3) and a heat medium liquid circulation pipe (2). The shock absorber is connected via an inlet line (5) and a discharge line (6), and the shock absorber is a pressure detecting means for detecting the internal pressure of the main line.
(A, B), and when the internal pressure is equal to or higher than the upper limit set value, open the control valve (8) interposed in the supply line,
And, when the internal pressure is less than the upper limit set value, the supply control unit (9) that closes the control valve, and when the internal pressure is equal to or less than the lower limit set value, the pump (10) interposed in the discharge line is operated, and When the internal pressure exceeds the lower limit set value, a discharge control unit (11) for stopping the operation of the pump, the buffer device further comprises:
Abnormal low pressure detecting means (C) for detecting the internal pressure of the discharge line between the pump and the main line, and stopping the operation of the pump when the internal pressure of the main line falls below an abnormal set value and alarming an abnormality. And an abnormality control unit (12) that emits the abnormal condition, wherein the abnormal set value is set to a predetermined pressure value lower than the lower limit set value.
The set value is a concept including a pressure range (differential).

[0006]

According to the floor heating apparatus 1 of the present invention, in particular, according to the shock absorber M constituting a main part, first, the internal pressure of the main line 4 is increased due to expansion of the heat medium liquid, and the internal pressure is set to a preset upper limit. When the value becomes equal to or more than the value, the supply control unit 9 detects the value and performs control to open the control valve 8. Thereby, the heat medium liquid in the main line 4 is supplied to the buffer tank 7 through the supply line 5. Therefore, the rupture of the heat medium liquid circulating pipes 2... Due to an increase in the internal pressure is prevented. Also, when the internal pressure becomes less than the upper limit set value, the supply control unit 9
Upon detecting this, control for closing the control valve 8 is performed.

On the other hand, the main line 4
When the internal pressure decreases and the internal pressure becomes equal to or lower than a preset lower limit set value, the discharge control unit 11 detects this and controls the pump 10 to operate. As a result, the heat medium in the buffer tank 7 is returned to the main line 4. Further, when the internal pressure exceeds the lower limit set value, the discharge control unit 11 detects this and performs control to stop the operation of the pump 10. Therefore, the internal pressure of the main line 4 is always maintained in a normal and constant pressure range.

If the heat medium liquid circulation pipe 2 ruptures and the liquid leaks, etc., and the internal pressure of the main line 4 becomes abnormally low and becomes lower than a preset abnormal set value, Abnormal control for stopping the operation of the pump 10 and issuing an alarm is performed.

[0009]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, an overall configuration of a floor heating device 1 according to the present invention will be described with reference to FIG.

Reference numeral 3 denotes a heat medium supply source for supplying a heat medium liquid, and includes a boiler 21. On the other hand, 22 and 23 are a supply line and a return line for transferring the heat medium liquid, and are connected to the boiler 21. In this case, the supply line 22 is positioned as the main line 4 and is connected to the boiler 21 via the pump 24.

A buffer device M is connected in the middle of the supply line 22 according to the present invention. The buffer device M includes a buffer tank 7 and is connected to a supply line 22 via a supply line 5 and a discharge line 6. A control valve 8 for opening and closing the supply line 5 is connected to the supply line 5, and a first pressure switch A for detecting the internal pressure of the supply line 22 and controlling the control valve 8 is provided upstream of the control valve 8. Attached. Thereby, the supply control unit 9 is configured.

On the other hand, a check valve 25, a pump 10, and a manual valve 26 are sequentially connected to the discharge line 6 from the buffer tank 7 side. Further, a second pressure switch B and a third pressure switch C for detecting the internal pressure of the supply line 22 are attached to the discharge line 6 located downstream of the manual valve 26, and the pump 10 is operated by the second pressure switch B. And a third pressure switch C to control the pump 10
Constitutes an abnormality control unit 12 for controlling the operation of. Reference numeral 27 denotes a pressure gauge for displaying the detected pressure.

A header 30 is connected between the supply line 22 and the return line 23. A plurality of heating medium liquid circulation pipes 2 laid on the floor are connected to the header 30. Hetzder 30
Are usually installed in units of a room. The header 30 is configured as follows. First, the supply side branch pipe 31 branched from the supply line 22 and the return line are provided inside the header 30.
A return branch pipe 32 branched from 23 is provided. An input port and a negative output port of the three-way switching valve 33 are connected in the middle of the supply-side branch pipe 31, and a check valve 34 is connected to the return-side branch pipe 32. The return-side branch pipe 32 upstream of the check valve 34 forms a reverse pipe 32r, and is laid on the floor between the reverse pipe 32r and the supply-side branch pipe 31 downstream of the three-way switching valve 33. Are connected. The heat medium liquid circulation pipe 2 is a pipe material formed of rubber, metal, synthetic resin, or the like.
Furthermore, the other output port of the three-way switching valve 33 and the check valve
A bypass circuit 35 is connected between the return-side branch pipes 32 on the downstream side of 34, and a pressure control valve 36 using a throttle valve or the like capable of variably adjusting the pressure is connected to the bypass circuit 35. In this case, the pressure set value of the pressure control valve 36 is set based on the pressure of the heat medium liquid circulating pipe 2..., And is desirably set to substantially the same as the pressure of the heat medium liquid circulating pipe 2. I do. The three-way switching valve 33 is electrically operated, and is controlled based on the detection results of the room temperature and the bed temperature sensor 37.

Next, the overall operation of the floor heating device 1 according to the present invention will be described with reference to FIG.

First, in use, the boiler 21 is operated to heat the heat medium liquid, and the pump 24 is operated to supply the heated heat medium liquid to the supply line 22. As a result, the heat medium liquid flows through the heat medium liquid circulating pipe 2 through the header 30.
, And floor heating is performed. In this case, the temperature is detected by the room temperature and bed temperature sensor 37, and when the temperature has not reached the set temperature, the three-way switching valve 33 is switched and controlled, the heat medium liquid circulation pipe 2 side port is opened, and the bypass circuit 35 side port is opened. To close. Thus, the heat medium liquid supplied from the supply line 22 is supplied to the heat medium liquid circulation pipe 2 via the three-way switching valve 33.
, And is cooled by heat exchange when passing through the heat medium liquid circulation pipes 2... And returned to the boiler 21 via the return line 23.

On the other hand, when the temperature exceeds the set temperature, the three-way switching valve 33 is switched and controlled to close the port on the heat medium liquid circulation pipe 2 side and open the port on the bypass circuit 35 side. This allows
The supply of the heat medium liquid to the heat medium liquid circulation pipe 2... Side is stopped, and flows into the bypass circuit 35 via the three-way switching valve 33.
Note that the detected value of the bed temperature in controlling the temperature is controlled with higher priority than the detected value of the room temperature.

Next, the operation of the shock absorber M constituting a main part of the floor heating device 1 will be described with reference to the flowcharts of FIGS.

Now, when the internal pressure of the supply line 22 increases due to the heat expansion of the heat medium liquid and the internal pressure exceeds the upper limit set value, the first pressure switch A detects this, and based on the detection signal, the first pressure switch A detects the connection valve 8. Control to open (Step 5
1, 52, 53). As a result, the heat medium liquid in the supply line 22 is supplied to the buffer tank 7 through the supply line 5, and the rupture of the heat medium liquid circulation pipes 2 due to an increase in the internal pressure is prevented (step 54). When the internal pressure becomes lower than the upper limit set value, the control valve 8 is controlled to be closed (steps 52 and 55).

On the other hand, a supply line is provided by cooling the heat medium liquid or the like.
When the internal pressure of the internal pressure 22 drops and the internal pressure falls below the lower limit set value, the second pressure switch B detects this and controls the pump 10 to operate based on the detection signal (steps 61 and 6).
2, 63). As a result, the heating medium in the buffer tank 7 is returned to the supply line 22 (step 64). When the internal pressure exceeds the lower limit set value, the second pressure switch B is controlled to stop the operation of the pump 10 (step 6).
2, 65).

Further, an accident such as liquid leakage occurs due to the rupture of the heat medium liquid circulating pipe 2..., And the pressure in the supply line 22 drops abnormally. Abnormal control for stopping the operation of the pump 10 and issuing an alarm is performed based on the detection signal (steps 66 and 6).
7, 68, 69).

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment.
For example, a pressure switch is used, but a pressure sensor and a control device using a computer or the like may be used in combination. Further, the buffer tank is connected to the supply line, but may be connected to the return line. In addition, details, configurations, shapes, quantities, and the like can be arbitrarily changed without departing from the spirit of the present invention.

[0023]

As described above, the floor heating device according to the present invention includes the buffer device having the buffer tank, the buffer device includes the pressure detecting means for detecting the internal pressure of the main line, and the supply control unit. And a discharge control section, the abnormal low pressure detecting means and the abnormal control section, wherein the abnormal set value is set to a predetermined pressure value lower than the lower limit set value. Prevents abnormal rise and fall of the internal pressure in the circulation pipe, always keeps the internal pressure at a stable level, and prevents the heat medium liquid in the buffer tank from flowing out due to leakage of the heat medium liquid circulation pipe by a simple configuration. Since it can be reliably prevented, there is a remarkable effect that each part such as the pump, the heat medium liquid circulation pipe, and the floor can be protected.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of a floor heating device according to the present invention.

FIG. 2 is a flowchart showing an operation at the time of supplying a buffer device in the floor heating device.

FIG. 3 is a flowchart showing an operation of the floor heating device when the buffer device is discharged.

[Explanation of symbols]

 Reference Signs List 1 floor heating device 2 heat medium liquid circulation pipe 3 heat medium supply source 4 main line 5 supply line 6 discharge line 7 buffer tank 8 control valve 9 supply control unit 10 pump 11 discharge control unit 12 abnormality control unit M buffer device

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[Procedure amendment]

[Submission date] April 1, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

[0003]

However, in the above-described conventional floor heating device , when the heating medium is heated, the heating medium itself expands, so that the main line for transferring the heating medium and the heating line are heated. The internal pressure of the medium liquid circulation pipe increases, which may cause the pump to be overloaded, rupture of the heat medium liquid circulation pipe due to expansion of the heat medium liquid circulation pipe, and furthermore, cracking of the floor surface. Was. In particular, this type of floor heating system
The pipes are different from the cold or hot water circulation pipes of general air conditioning equipment.
No, there are the following special circumstances. (1) Antifreeze is often used as a heat transfer fluid,
It is necessary to manage the limited amount of water in the pipe efficiently.
You. (2) In floor heating systems, relatively small-diameter piping
Because the pipes are laid at high density over the entire area,
Longer, and the total length of the piping is
Depending on the floor area of the construction site (floor heating room or building)
Therefore, there is a great difference between the construction sites,
It cannot be set quasi-standard. For this reason, floor heating
In the main pipe system, adjustment and management of fluid pressure in the pipe
Because it is extremely difficult, set the pressure reference value in advance.
Set or universally applicable to various buildings
The reference pressure value cannot be set in advance. Therefore, the floor
Individual and specific pressure standards according to the building where the heating system is installed
Specific site settings and site adjustments must be made
Is required for In addition, the pressure fluctuation of the fluid in the pipe is prevented.
As a means, a diaphragm type expansion tank is known.
However, if such an expansion tank is interposed in the main pipe system,
Even with the pressure fluctuation absorption capacity of a typical expansion tank, the floor
Preventing pressure fluctuations in the fluid in the heating piping is a fact.
Above all, it is extremely difficult. That is, in the floor heating piping,
A large amount of water is retained in the piping and the temperature change is large
Characteristic, and therefore the pressure of a typical pressure expansion tank
Depending on the setting range, the pressure fluctuation of the fluid in the pipe is fully compensated
Difficult to do. (3) A common safety valve with a high safety factor
Adopt a method to uniformly avoid abnormal rise in pressure
And the allowable value of the main pipe pressure rise is out of the normal operation range.
Must be set to an abnormal value.
Pressure fluctuations directly affect floor heating piping
Use unnecessary pressure load or pressure change
Movement is imposed. Such a situation, as floor heating piping
Especially when using elastic pipes such as resin pipes or rubber pipes
Should. In addition, Japanese Utility Model Application No. 53-143174 (actual
Japanese Unexamined Patent Publication No. 55-59217) includes a pressurized water supply channel (7),
Equipped with a pressure relief path (9) and a water tank (4), and pressure relief valve (8)
A circulation circuit with a configuration interposed in the escape path (9) is disclosed
However, the safety valve states,
When it rises, it limits its maximum pressure to
This is a valve to prevent danger.
Valve of a mechanical mechanism to be
It is not of a nature that should essentially have a function.
This is obviously the case if the safety valve operates during normal operation.
Malfunction of the safety valve during normal operation.
Is one of the rudimentary malfunctions that makes continuous operation of the equipment impossible.
Is a seed). (4) The heating medium circulating in the floor heating piping
Temperature changes over the entire temperature range, causing the entire liquid volume in the tube to thermally expand
Since it contracts, it is necessary to compensate for this quickly. Only
However, only by the diaphragm type expansion tank, etc.
Doing this is difficult in practice. (5) On the other hand, use a pressurizing pump to control the fluid pressure in the pipe.
In the unlikely event that heating is laid over the entire indoor floor,
When the pipe breaks or cracks, etc.
Not only leaks into the room in large quantities, but also
Loss (seizure etc.) may occur.
Should be prevented.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

The present invention has been made to solve the problems existing in the prior art, and compensates for the pressure fluctuation of the fluid in the pipe in the main line and the heat medium liquid circulating pipe , thereby reducing the fluid in the pipe.
It is an object of the present invention to provide a floor heating device capable of stably maintaining a pressure and protecting each part.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

According to the present invention, there is provided a method of laying on a floor.
Heating supplied from the heat medium supply source to the heat medium liquid circulation pipe
Circulating the heat medium liquidfloorFor floor heating systems that perform heating
AndPrevent pressure fluctuation of heat transfer fluid in heat transfer pipe
As a pressure bufferBuffering device with buffer tank (7)
(M), wherein the buffer tank is provided with a heat medium supply source.
Main line (4) connecting (3) with the heat medium liquid circulation pipe (2)
Halfway through the supply line (5) and the discharge line (6)
Connected, the shock absorber detects the internal pressure of the main line
Pressure detection means (A, B)And a control interposed in the supply line
Valve (8) and pump (10) arranged in the discharge line
A check valve (25) interposed in the discharge line (6);
A control unit (9, 11) for controlling the operation of the pump and the control valve;
Equipped,The pressure detecting means is a pipe pressure of the supply line.
A supply pressure detecting means (A) for detecting a force, and the discharge line
Discharge pressure detecting means (B) for detecting the pressure in the pipe,
The control unit is configured so that the supply pressure detecting means (A) is set to an upper limit set value.
When the above pipe pressure is detected, the control valve (8)
Open the pipe where the supply pressure detection means (A) is less than the upper limit set value.
When the pressure is detected, the control valve closes the control valve.
Control unit (9) and the discharge pressure detecting means (B) are below the lower limit set value.
When the lower pipe pressure is detected, the pump (10) is activated.
Pipes whose discharge pressure detecting means (B) exceeds the lower limit set value.
When the internal pressure is detected, stop the operation of the pump
Floor heating device having an emission control unit (11)
Claim 1 is provided. The present invention further provides the above floor heating device.
A discharge line between the pump and the main line.
Abnormal low pressure detecting means (C) for detecting the internal pressure of
When the internal pressure of the line falls below the abnormal set value,
Abnormality control unit (1) that stops the operation of the pump and issues an alarm
2), wherein the abnormal set value is greater than the lower limit set value.
Floor heating characterized by being set to a predetermined low pressure value
An apparatus (claim 2) is provided.The set value is the pressure range
(Differential).

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

According to the structure of the present invention described in claim 1,
The floor heating device 1 prevents pressure fluctuation of the heat transfer fluid in the pipe
A buffer device M is provided as a pressure buffer device. Shock absorber M
Is provided in the main pipe system together with a general expansion tank,
Is the main pipe instead of the expansion tank generally provided in the main pipe system.
It is arranged in the system . The internal pressure of the main line 4 increases due to the expansion of the heat medium liquid, and the internal pressure of the main line 4 exceeds a preset upper limit set value .
At this time, the supply control unit 9 performs control to open the control valve 8. As a result, the heating medium in the main line 4 is supplied to the supply line 5
It flows into the buffer tank 7 via the internal pressure of the main line 4
Descends. Thus, it is possible to prevent overload or rupture of the heat medium liquid circulating pipes 2 due to an increase in the internal pressure.
Wear. It should be noted that the check valve 25 is used to discharge the internal pressure of the main line 4 to the discharge line.
To prevent it from propagating to the buffer tank 7 through the inlet 6.
You. Further, when the internal pressure of the main line 4 falls below the upper limit set value , the supply control unit 9 detects this and controls the control valve 8.
Perform close control.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

On the other hand, the main line 4
Internal pressure drops and the internal pressure falls below the preset lower limit set value .
When descending, the discharge control unit 11 performs control for operating the pump 10. As a result, the heat medium liquid in the buffer tank 7 is supplied to the main line 4, and the internal pressure of the main line 4 increases.
You. When the internal pressure of the main line 4 is exceeded the lower limit set value, the discharge
The control unit 11 controls to stop the operation of the pump 10.
Thus, the internal pressure of the main line 4 is always maintained within a normal and constant pressure range. The check valve 25 is provided in the main line 4.
Pressure propagates to buffer tank 7 via discharge line 6
And the internal pressure of the main line 4 is maintained.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008] Further, the structure of the present invention described in claim 2 is provided.
Rupture of the heat medium liquid circulating pipes 2..., Etc., and the internal pressure of the main line 4 rises to a preset abnormal value.
When an abnormal drop occurs below the fixed value, the abnormality control unit 12
The operation of the pump is stopped and an abnormal alarm is issued.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

[0023]

According to the first aspect of the present invention, there is provided a floor heating device.
According to the location, (1) Efficiently manage the limited amount of water in the pipe
(2) By changing the setting of the pressure detection means
Individual and equipment according to the building where the floor heating system is installed
Physical site settings and site adjustments must be made for each site
It can be easily performed, and mechanical such as diaphragm
It is necessary to set a wide pressure fluctuation range that is difficult to adapt with the mechanism.
(3) Abnormal pressure fluctuation during steady operation is regulated.
Overload or breakage of elastic pipes such as resin pipes or rubber pipes
(4) Diaphragm type inflation
Fluid volume in floor heating piping that is difficult to regulate depending on the tension tank etc.
It is possible to compensate for the temperature expansion and contraction of the product. Claim
According to the configuration of the present invention described in Item 2, floor heating piping
Early leakage of water retained in the main pipe due to breakage or cracking
To prevent damage to the pressure pump (seizure, etc.)
It can be reliably prevented. Thus, according to the invention
For example, if the fluid in the main line and the heat medium
Compensates for pressure fluctuations and keeps the fluid pressure in the pipe stable
In addition, a floor heating system that can protect each part
Can be provided.

Claims (2)

[Claims] 1. A floor heating device for heating by circulating a heated heat medium liquid supplied from a heat medium supply source through a heat medium liquid circulation pipe laid on a floor, comprising: a buffer having a buffer tank (7). Device (M), and the buffer tank is provided with a supply line in the middle of a main line (4) connecting the heat medium supply source (3) and the heat medium liquid circulation pipe (2).
(5) and a discharge line (6), the buffer device includes pressure detection means (A, B) for detecting the internal pressure of the main line, and when the internal pressure is equal to or higher than an upper limit set value. A control valve (8) that opens the control valve (8) interposed in the supply line and closes the control valve when the internal pressure is less than the upper limit set value; A discharge control unit (11) that operates a pump (10) interposed in the discharge line, and stops the operation of the pump when the internal pressure exceeds a lower limit set value. Abnormal low pressure detecting means (C) for detecting the internal pressure of the discharge line between the pump and the main line
And an abnormality control unit (12) that stops the operation of the pump and issues an abnormality alarm when the internal pressure of the main line falls below the abnormality set value, wherein the abnormality set value is greater than the lower limit set value. A floor heating device set to a predetermined low pressure value. 2. The apparatus according to claim 1, wherein the pressure detecting means includes a supply pressure detecting means (A) for detecting a pressure of the supply line, and a discharge pressure detecting means (B) for detecting a pressure of the discharge line. The floor heating device according to claim 1, wherein: