JP4340969B2 - Floor heating system - Google Patents

Description

  The present invention relates to a floor heating system that heats a room by circulating a heat medium in a floor heating device, and more particularly to a floor heating system having a function of performing a hot dash operation when heating is started.

(First example)
The floor heating system heats the floor heating unit by circulating hot water in a floor heating unit (floor heating device) such as a floor heating panel or floor heating mat, and indirectly heats the room by heat radiation from the floor heating unit. Therefore, it takes time for the room to reach the set temperature when heating is started.

  Therefore, the conventional floor heating system circulates heating hot water having a temperature higher than the temperature of the heating hot water circulated during normal heating operation for a certain time (for example, about 30 to 60 minutes) at the start of the heating operation. I am letting. This is called hot dash operation in the floor heating system, and the time required for the floor surface temperature of the floor heating unit to rise to the set temperature can be shortened.

  On the other hand, when a plurality of floor heating units are connected in parallel and the heating hot water is circulated through each floor heating unit, the floor heating system may be configured by combining floor heating units having different heat radiation characteristics. Here, the heat dissipation characteristic of the floor heating unit represents the heating efficiency of the floor heating unit. For example, a floor heating unit in which the floor surface temperature is 30 ° C. when heating hot water having a temperature of 60 ° C. is continuously supplied, and a floor in which the floor surface temperature is 30 ° C. when heating hot water having a temperature of 50 ° C. is continuously supplied. A heating unit is a floor heating unit having different heat dissipation characteristics.

  However, in a floor heating system that combines floor heating units with different heat dissipation characteristics, at the initial stage of heating operation, the flow rate of each floor heating unit is maximized to circulate heating water hotter than normal to each floor heating unit for a certain period of time. When the hot dash operation is performed, the floor surface temperature changes between the floor heating unit with high heat dissipation characteristics and the floor heating unit with low heat dissipation characteristics as shown in FIG. In FIG. 1, the horizontal axis is the elapsed time T from the start of the floor heating operation, the vertical axis is the floor surface temperature G, Th is the hot dash operation time, and the curve C1 is the floor surface of the floor heating unit having high heat dissipation characteristics. A change in temperature is shown, and a curve C2 shows a change in floor surface temperature of a floor heating unit having low heat dissipation characteristics.

  As shown in FIG. 1, a floor heating unit having high heat dissipation characteristics (for example, a floor surface temperature of 30 ° C. when heating hot water having a temperature of 50 ° C. is continuously supplied) and floor heating having low heat dissipation characteristics. In the unit (for example, the floor surface temperature becomes 30 ° C. when heating hot water having a temperature of 60 ° C. is continuously supplied), the rate of temperature rise of the floor surface temperature during hot dash operation is not equal. However, in the past, the hot dash operation time was constant for any floor heating unit, so the floor surface temperature of the floor heating unit with high heat dissipation characteristics increased during and after the hot dash operation. Or the floor surface temperature of a floor heating unit with low heat dissipation characteristics is too low.

  For this reason, in the conventional floor heating system, the dispersion | variation in the floor surface temperature at the time of a hot dash operation | movement is large, and there existed a possibility that the comfort of a floor heating system might be impaired. In particular, in a floor heating unit having high heat dissipation characteristics, the floor surface temperature becomes too high, which may cause discomfort to people on the floor.

(Second example)
In addition, the floor heating unit is connected to the heat source unit by piping, but while the floor heating system is shut down, the heated hot water in the piping is chilled by heat dissipation, and the chilled water is distributed over the entire length of the piping. Accumulated. For this reason, even if the hot dash operation of the floor heating system is started, the hot dash operation is actually started until the cold water in the pipe passes through the floor heating unit and the high temperature heating hot water reaches the floor heating unit. do not do.

  In addition, when multiple floor heating units are connected, the lengths of the pipes connected to each floor heating unit are usually different from each other, so that they accumulate between the heat source unit and the floor heating unit. The amount of cold water that is present varies from floor to floor.

  Therefore, even if the hot dash operation is performed for a certain time from the start of the heating operation, the actual hot dash operation time of each floor heating unit varies due to the difference in the length of the pipe connected to each floor heating unit. The floor surface temperature after hot dash operation also varied.

Japanese Patent Laid-Open No. 2002-39552

  The present invention has been made in view of the technical problems as described above, and the object of the present invention is in a floor heating system including a plurality of floor heating devices, a difference in heat dissipation characteristics of each floor heating device, The purpose is to reduce variations in hot dash operation due to differences in pipe length.

In a first floor heating system according to the present invention, a plurality of floor heating devices are connected to a heat source unit, and at the start of heating operation, a hot medium is circulated through each floor heating device than in normal operation to perform hot dash operation. In the floor heating system to be performed, temperature detection means for detecting the heat medium inflow temperature to each floor heating device, and measurement of hot dash operation time of each floor heating device when the temperature detected by the temperature detection means exceeds a certain temperature And a control means for sequentially terminating the hot dash operation of the floor heating device after a predetermined hot dash operation time has elapsed. In the present invention, the temperature detection means for detecting the temperature of the heat medium flowing into the floor heating device is installed so as to detect the temperature of the heat medium flowing into the floor heating device, or detects the floor surface temperature of the floor heating device. It is preferable to install so as to.

In the first floor heating system according to the present invention, when the temperature of the heat medium flowing into the floor heating device detected by the temperature detection means exceeds a certain temperature, the hot dash operation time of each floor heating device is Measurement has started. That is, the hot dash operation time is measured from the time when the low temperature heat medium in the pipe connected to the floor heating device passes through the floor heating device and the high temperature heat medium for hot dash operation reaches the floor heating device. Can do. Therefore, the hot dash operation time can be accurately measured without being affected by the length of the pipe connected to the floor heating device. Moreover, it is possible to prevent variation in hot dash operation for each floor heating device due to a difference in the pipe length connected to each floor heating device.

In the second floor heating system according to the present invention, a plurality of floor heating devices are connected to the heat source unit, and at the start of the heating operation, a hot medium is circulated through each floor heating device than in the normal operation to perform hot dash operation. In the floor heating system to be performed, temperature detection means for detecting the heat medium inflow temperature to each floor heating device, and means for determining the temperature rise rate of the heat medium inflow temperature of each floor heating device based on the detected temperature of the temperature detection means And when the temperature rise rate of the heat medium inflow temperature of the floor heating device exceeds a certain value, the measurement of the hot dash operation time of each floor heating device is started, and the floor heating device in which a predetermined hot dash operation time has elapsed And a control means for sequentially terminating the hot dash operation.

In the second floor heating system according to the present invention, when the temperature rise rate of the heat medium inflow temperature obtained from the heat medium inflow temperature to the floor heating device detected by the temperature detection means exceeds a certain value. The measurement of the hot dash operation time of each floor heater is started. That is, the hot dash operation time is measured from the time when the low temperature heat medium in the pipe connected to the floor heating device passes through the floor heating device and the high temperature heat medium for hot dash operation reaches the floor heating device. Can do. Therefore, the hot dash operation time can be accurately measured without being affected by the length of the pipe connected to the floor heating device. Moreover, it is possible to prevent variation in hot dash operation for each floor heating device due to a difference in the pipe length connected to each floor heating device.

  In addition, the component demonstrated above of this invention can be combined arbitrarily as much as possible.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, it is needless to say that the present invention should not be limited to the following examples.

  FIG. 2 is a schematic configuration diagram showing a floor heating system according to the present invention. The floor heating system includes a heat source device 11, a plurality of floor heating units 12 and 13, and a circulating water control unit 14. The floor heating unit (floor heating device in the claims) is a general term for heating members installed on the floor, such as a floor heating panel and a floor heating mat. Here, two floor heating units 12 and 13 are combined. In the following description, an example using warm water as a heating medium for heating will be described. The floor heating unit 12 is a floor heating unit having low heat dissipation characteristics (for example, a floor surface temperature that becomes a set temperature of 30 ° C. when heating hot water having a temperature of 60 ° C. is continuously supplied). A floor heating unit having high heat dissipation characteristics (for example, a floor surface temperature that becomes a set temperature of 30 ° C. when heating hot water having a temperature of 50 ° C. is continuously supplied).

  The heat source device 11 includes an expansion tank 15, a circulation pump 16, a heat exchanger 17 and a gas burner 18, and the expansion tank 15, the circulation pump 16 and the heat exchanger 17 are connected by a heating / hot water pipe 19. The heat source unit 11 collects the chilled water after radiating heat from the floor heating units 12 and 13, heats the chilled water, and circulates it again to the floor heating units 12 and 13. That is, the cold water that has radiated heat from the floor heating units 12 and 13 and has returned from the heating hot water return pipe 19 b of the heating hot water pipe 19 is collected in the expansion tank 15. The cold water in the expansion tank 15 is replenished from the water supply when the water level drops due to evaporation of the circulating water or the like. When the circulation pump 16 is operated, the cold water in the expansion tank 15 passes through the heat exchanger 17, is heated by the gas burner 18 in the heat exchanger 17, and the heated hot heating water is heated in the heating hot water pipe 19. It is sent to the floor heating units 12 and 13 through the warm water outlet pipe 19a.

  In the circulating water control unit 14, a plurality of branch pipes 20 and 21 are branched from the heating / warming water outgoing pipe 19 a of the heating / hot water pipe 19, and a flow control valve 22 and an opening / closing valve 24 are connected in series to one branch pipe 20. The flow control valve 23 and the open / close valve 25 are connected in series to the other branch pipe 21. A recirculation pump 27 is provided in the junction pipe 26 between the branch pipes 20 and 21 and the heating / warming water return pipe 19b.

  Further, in the branch pipe 20, a circulation forward pipe 28 a is branched from the middle between the flow control valve 22 and the on-off valve 24, and the circulation forward pipe 28 a is connected to the hot water inlet of the floor heating unit 12 having low heat dissipation characteristics. The other end of the circulation return pipe 28b connected to the hot water outlet of the unit 12 is connected to the heating hot water return pipe 19b. Similarly, in the branch pipe 21, a circulation forward pipe 29a is branched from the middle between the flow control valve 23 and the on-off valve 25, and the circulation forward pipe 29a is connected to the hot water inlet of the floor heating unit 13 having high heat dissipation characteristics. The other end of the circulation return pipe 29b connected to the hot water outlet of the heating unit 13 is connected to the heating hot water return pipe 19b.

  In FIG. 2, what is indicated by reference numeral 31 is a fan convector for indoor heating installed as necessary. The fan conduit vector 31 is connected to a return pipe 30a branched from the heating / warming water return pipe 19a and a return pipe 30b connected to the heating / warming water return pipe 19b.

  Furthermore, this floor heating system includes a control device 33 with a built-in microcomputer, and the control device 33 is connected to the circulation pump 16 and the flow rate control valves 22 and 23 according to a program stored in advance in the storage device. The floor heating system is operated by controlling the on-off valves 24 and 25, the circulating pump 27, the on-off valve 32, and the like.

  FIG. 3 is a time chart showing a control state of the floor heating system by the control device 33 at the start of operation. 3 (a) shows the operating state of the circulation pump 16, FIG. 3 (b) shows the operating state of the circulating pump 27, FIG. 3 (c) shows the open / closed state of the on-off valve 25, and FIG. 3 shows the control state of the flow control valve 23, FIG. 3 (e) shows the open / close state of the open / close valve 24, and FIG. 3 (f) shows the control state of the flow control valve 22. When the operation of the floor heating system is stopped, the circulation pump 16 and the circulation pump 27 are stopped, and the flow control valves 22 and 23 and the on-off valves 24 and 25 are closed.

  When the floor heating system starts operation, first, the circulation pump 16 and the circulation pump 27 start operation, and the flow control valves 22 and 23 are fully opened while the on-off valves 24 and 25 are closed. Next, after the passage of water through the heating hot water pipe 19 is confirmed, the gas burner 18 starts to burn. At the start of this heating operation, the floor heating system performs hot dash operation. That is, in this state, high-temperature heating hot water of, for example, 80 ° C. is supplied from the heat exchanger 17 to the heating hot water going-out pipe 19a. Since the on-off valves 24 and 25 are closed and the flow rate control valves 22 and 23 are open, heating hot water flows through the floor heating system as shown by solid arrows in FIG.

  If it demonstrates with reference to FIG. 2, the heating hot water with the hot water temperature of 80 degreeC currently flowing into the heating hot water going-out piping 19a will be divided into the branch piping 20 and 21, and will flow. Heating hot water having a hot water temperature of 80 ° C. flowing in the branch pipe 20 circulates in the floor heating unit 12 through the circulation forward pipe 28a and the circulation return pipe 28b, and rapidly heats the floor heating unit 12. Similarly, the heated hot water having a hot water temperature of 80 ° C. flowing in the branch pipe 21 circulates in the floor heating unit 13 through the circulation forward pipe 29a and the circulation return pipe 29b, and rapidly heats the floor heating unit 13.

  Since the floor heating unit 13 has higher heat radiation efficiency than the floor heating unit 12, the floor surface temperature of the floor heating unit 13 is the floor heating even if the heating water with the same hot water temperature circulates in both floor heating units 13 and 12. The temperature rises more rapidly than the floor surface temperature of the unit 12. Now, when heating hot water having a hot water temperature of 80 ° C. is circulated, in the floor heating unit 13 with high heat dissipation efficiency, the floor surface temperature reaches a predetermined temperature Go near the floor surface temperature during normal operation at time Th1, In the floor heating unit 12 with low heat dissipation efficiency, the floor surface temperature reaches a predetermined temperature Go near the floor surface temperature during normal operation at time Th2 (> Th1). These hot dash operation times Th1 and Th2 can be experimentally determined in advance.

  The control device 33 measures the time after the start of operation by the timer function, and when the hot dash operation time Th1 when the heat dissipation characteristic is high, the on-off valve 25 is opened as shown in FIG. Heating hot water flowing out from the floor heating units 12 and 13 to the heating hot water return pipe 19b dissipates heat in the floor heating units 12 and 13 and becomes low-temperature heating hot water. The low temperature heating hot water flows into the forward pipe 29a, and the temperature of the heating hot water flowing into the floor heating unit 13 decreases. At the same time, as shown in FIG. 3D, the flow control valve 23 is throttled so that the temperature of the hot water flowing into the floor heating unit 13 from the circulation forward pipe 29a is adjusted to 50 ° C. Under normal heating operation, the floor surface temperature is maintained at the set temperature of 30 ° C. At this time, heating hot water of 40 ° C. flows out from the floor heating unit 13 to the circulation return pipe 29b.

  Further, when the hot dash operation time Th2 when the heat dissipation characteristic is low has elapsed, the on-off valve 24 is opened as shown in FIG. When the on-off valve 24 is opened, the low-temperature heating hot water flows into the circulation pipe 28a by the circulation pump 27, and the temperature of the heating hot water flowing into the floor heating unit 12 is lowered. And as shown in FIG.3 (f), the valve | bulb of the flow control valve 22 is restrict | squeezed, and the warm water temperature which flows in into the floor heating unit 12 from the circulation forward pipe 28a is adjusted to 60 degreeC, and the floor heating unit 12 is also adjusted. Under normal heating operation, the floor surface temperature is maintained at the set temperature of 30 ° C. At this time, heating hot water of 50 ° C. flows out from the floor heating unit 13 to the circulation return pipe 29b.

  Therefore, according to this floor heating system, the floor surface temperatures G of the floor heating units 12 and 13 change as shown in FIG. In FIG. 4, the horizontal axis represents the elapsed time T after the start of operation, the vertical axis represents the floor surface temperature G of the floor heating unit, the curve C1 represents the change in the floor surface temperature of the floor heating unit 13, and the curve C2 represents the floor The change of the floor surface temperature of the heating unit 12 is represented.

  When the floor heating units 12 and 13 having different heat radiation temperature characteristics are operated for hot dash for the same time Th as in the prior art, the floor surface temperature of the floor heating unit having high heat radiation characteristics becomes too high as shown in FIG. give. On the other hand, in the floor heating system of the present embodiment, since the hot dash operation is performed only for the times Th2 and Th1 corresponding to the heat radiation characteristics of the respective floor heating units 12 and 13, any floor heating unit 12, No. 13 becomes the same floor surface temperature by hot dash operation, and the feeling of use becomes good.

  In addition, when only one floor heating unit 12 is used, the circulating pump 27 may be stopped and only the flow control valve 22 may be opened.

  Further, when the fan convector 31 is used, the on-off valve 32 may be opened. When the on-off valve 32 is opened, high-temperature (80 ° C.) heating hot water flows into the fan convector 31 through the forward piping 30a and the return piping 30b, and hot air that exchanges heat with the heating hot water is blown into the room.

  FIG. 5 is a diagram showing the configuration of a floor heating system according to another embodiment of the present invention. In this embodiment, the floor heating unit 12 is provided with a temperature sensor 34 for measuring the floor surface temperature G, and the floor heating unit 13 is also provided with a temperature sensor 35 for measuring the floor surface temperature G. .

  Therefore, in this embodiment, immediately after the start of the heating operation, the temperature sensor 34, 35 measures the change ΔG in the floor surface temperature during a certain time ΔT, and the magnitude of the temperature rise rate ΔG / ΔT of the floor surface temperature. To determine whether the floor heating unit has a large heat dissipation characteristic or a floor heating unit having a small heat dissipation characteristic.

  As shown in FIG. 6, when the temperature rise rate ΔG1 / ΔT of the floor surface temperature is large (curve C1), it is determined that the floor heating unit is the floor heating unit 13 having a large heat dissipation characteristic, and the short hot dash operation is performed. Time Th1 is applied. When the temperature rise rate ΔG2 / ΔT of the floor surface temperature is small (curve C2), it is determined that the floor heating unit is the floor heating unit 12 having a small heat dissipation characteristic, and the long hot dash operation time Th2 is applied. .

  According to this embodiment, since the heat radiation characteristic of the floor heating unit can be determined from the temperature rise rate of the floor surface temperature measured by the temperature sensors 34 and 35, the type of each floor heating unit is registered in the control device in advance. This saves you time and effort.

  In this embodiment, the position where the temperature sensors 34 and 35 are provided may be the circulation return pipes 28b and 29b.

  The configuration of the floor heating system in this embodiment is the same as that shown in FIG. Therefore, also in the floor heating system of this embodiment, the temperature sensors 34 and 35 detect the floor surface temperature G of each floor heating unit 12 and 13. FIG. 7 represents a temporal change in the floor surface temperature G of the floor heating units 12 and 13, and the floor surface temperature Go is a value near the floor surface temperature during normal heating operation.

  In this embodiment, the floor surface temperature G of each floor heating unit 12, 13 is detected by the temperature sensors 34, 35, and when the floor surface temperature G of the floor heating unit 12, 13 exceeds a predetermined temperature Go, that floor The hot dash operation of the heating unit has ended. In FIG. 6, in the case of the floor heating unit 13 having a large heat dissipation characteristic (curve C1), the hot dash operation is finished at time T1, and in the case of the floor heating unit 12 having a low heat dissipation characteristic (curve C2), the time T2 is reached. The hot dash operation ends.

  According to such an embodiment, it is possible to perform the hot dash operation so that each floor heating unit has a uniform floor surface temperature regardless of the difference in heat radiation characteristics of the floor heating unit or the difference in pipe length.

  FIG. 8 is a diagram for explaining a modification of the third embodiment. In the third embodiment, the hot dash operation is stopped when the detected temperature of the temperature sensors 34 and 35 reaches the predetermined temperature Go. However, as shown in FIG. 8, the floor surface temperature G detected by the temperature sensor. The hot dash operation of the floor heating unit may be terminated when the temperature rise rate of the floor reaches a predetermined value α (time T5 in FIG. 8).

  FIG. 9 is a diagram showing a configuration of a floor heating system according to still another embodiment of the present invention. In this embodiment, floor heating units 12a and 12b having the same heat radiation characteristics are used, and a temperature sensor 36 is provided in the circulation forward pipe 28a in the vicinity of the hot water inlet of one floor heating unit 12a, and the other floor heating is provided. A temperature sensor 37 is provided in the circulation forward pipe 29a in the vicinity of the hot water inlet of the unit 12b. In the installed state, the piping length is different between the floor heating unit 12a and the floor heating unit 12b, the piping length from the heat source unit 11 to the floor heating unit 12a is short, and the piping length from the heat source unit 11 to the floor heating unit 12b is short. Suppose it is getting longer.

  In such a case, at the time of starting the hot dash operation of the floor heating system, the floor heating unit 12a and the floor heating unit 12b are different in time until the high-temperature (80 ° C) heating hot water reaches from the heat source unit 11, In the floor heating unit 12b having a long pipe length, the floor surface temperature starts to rise later than the floor heating unit 12a. Therefore, if the hot dash operation of the floor heating unit 12a and the floor heating unit 12b is finished at the same time as in the prior art, the time of the hot dash operation is substantially different between the floor heating unit 12a and the floor heating unit 12b. There is a possibility that the floor surface temperature of the heating unit 12b is not sufficiently increased by the hot dash operation.

  Therefore, in this embodiment, at the time of hot dash operation, the temperature sensor 36 monitors the inflow temperature L of the heating hot water flowing into the floor heating unit 12a, and the temperature sensor 37 determines the inflow temperature L of the heating hot water flowing into the floor heating unit 12b. The measurement of the hot dash operation time Th is started with reference to the time when the hot water inflow temperature L monitored and detected by the temperature sensors 36 and 37 reaches the predetermined temperature Lo. The predetermined temperature Lo is set to an eye value slightly higher than the temperature of water at normal temperature (during non-operation).

  FIG. 10 shows, in this embodiment, the time change (curve C5) of the hot water inflow temperature L (temperature detected by the temperature sensor 36) to the floor heating unit 12a and the hot water inflow temperature L (temperature sensor 37 of the temperature sensor 37) to the floor heating unit 12b. The time change (curve C6) of the detected temperature), the time change (curve C3) of the floor surface temperature G of the floor heating unit 12a, and the time change (curve C4) of the floor surface temperature G of the floor heating unit 12b are shown. Yes. In this case, since the floor heating unit 12a has a shorter pipe length than the floor heating unit 12b, the temperature detected by the temperature sensor 36 rises earlier than the temperature detected by the temperature sensor 37, and the temperature sensor 36 is reached at time T3. When the detected temperature L becomes No, the control device 33 starts measuring the hot dash operation time of the floor heating unit 12a using the timer function. Next, when the detected temperature L of the temperature sensor 37 becomes Lo at time T4 behind the temperature sensor 36, the control device 33 starts measuring the hot dash operation time of the floor heating unit 12b. And if hot dash operation time of the floor heating unit 12a which started measurement from time T3 becomes Th, the control apparatus 33 will end the hot dash operation of the floor heating unit 12a. Further, when the hot dash operation time of the floor heating unit 12b that starts measurement from time T4 becomes Th, the control device 33 ends the hot dash operation of the floor heating unit 12b.

  Therefore, according to this embodiment, the hot dash operation time is measured after the incoming water temperature of each floor heating unit begins to rise, and the same hot dash operation time Th (if the heat dissipation characteristics of the floor heating unit are different, The operation time may be different.) Since the hot dash operation is performed only, the floor heating units can be heated uniformly regardless of whether the pipe length is long or short.

  In the above embodiment, the temperature sensors 36 and 37 are provided in the circulation outgoing pipes 28a and 29a. However, they may be provided in the floor heating units 12a and 12b or in the circulation return pipes 28b and 29b.

  In the above embodiment, the hot dash operation time is counted when the detected temperature (hot water inflow temperature) L of the temperature sensors 36 and 37 reaches the predetermined temperature Lo. However, as shown in FIG. When the temperature rise rate (inclinations of the curves C5 and C6) K of the detected temperature (warm water inflow temperature) L of the sensors 36 and 37 becomes a constant value Ko, counting of the hot dash operation time may be started. .

In the conventional floor heating system, it is the figure showing the change of the floor surface temperature of the floor heating unit from which a thermal radiation characteristic differs. It is a schematic block diagram which shows the floor heating system by Example 1 of this invention. (A) is a time chart showing the operation state of the circulation pump, (b) is a time chart showing the operation state of the circulating pump, (c) and (e) are time charts showing the open / close state of the on-off valve, (d) and (F) is a time chart which shows the control state of a flow regulating valve. It is a figure in the case of Example 1 which shows the change of the floor surface temperature of a floor heating unit, and hot dash operation time. It is a schematic block diagram which shows the floor heating system by Example 2 of this invention. It is a figure in the case of Example 2 which shows the change of the floor surface temperature of a floor heating unit, and hot dash operation time. It is a figure which shows the change of the floor surface temperature of a floor heating unit in the case of Example 3, and the time of completion | finish of a hot dash driving | operation. FIG. 10 is a diagram for explaining a modification of the third embodiment. It is a schematic block diagram which shows the floor heating system by Example 4 of this invention. It is a figure which shows the change of the warm water inflow temperature to a floor heating unit in the case of Example 4, and the change of the floor surface temperature of a floor heating unit. It is a figure which shows the change of the warm water inflow temperature to a floor heating unit in the case of the modification of Example 4, and the change of the floor surface temperature of a floor heating unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Heat source machine 12, 13 Floor heating unit 12a, 12b Floor heating unit 14 Circulating water control part 15 Expansion tank 16 Circulating pump 17 Heat exchanger 19 Heating hot water piping 19a Heating hot water return piping 19b Heating hot water return piping 22 Flow control valve 23 Flow rate Control valve 24 Open / close valve 25 Open / close valve 27 Circulating pump 28a Circulation forward pipe 28b Circulation return pipe 29a Circulation forward pipe 29b Circulation return pipe 31 Fan convector 33 Controller 34 Temperature sensor 35 Temperature sensor 36 Temperature sensor 37 Temperature sensor

Claims (2)

In the floor heating system in which a plurality of floor heating devices are connected to the heat source unit, and a hot dash operation is performed by circulating a heat medium having a higher temperature than in normal operation to each floor heating device at the start of heating operation.
Temperature detection means for detecting the heat medium inflow temperature to each floor heating device;
When the temperature detected by the temperature detection means exceeds a certain temperature, the measurement of the hot dash operation time of each floor heating device is started, and the hot dash operation of the floor heating device after a predetermined hot dash operation time has been sequentially terminated Control means;
With floor heating system. In the floor heating system in which a plurality of floor heating devices are connected to the heat source unit, and a hot dash operation is performed by circulating a heat medium having a higher temperature than in normal operation to each floor heating device at the start of heating operation.
Temperature detection means for detecting the heat medium inflow temperature to each floor heating device;
Means for determining the temperature rise rate of the heat medium inflow temperature of each floor heating device based on the detected temperature of the temperature detecting means;
When the temperature rise rate of the heat medium inflow temperature of the floor heating device exceeds a certain value, the measurement of the hot dash operation time of each floor heating device is started, and the hot of the floor heating device after a predetermined hot dash operation time has elapsed Control means for sequentially terminating the dash operation;
With floor heating system.

Images