JP2019056505A - Underfloor heating system - Google Patents

Abstract

To provide an underfloor heating system that enables efficient air-conditioning.SOLUTION: An underfloor heating system includes: an underfloor heating device that has a heat pump unit, a radiator disposed in an underfloor space and capable of radiating heat of a heating medium supplied from the heat pump unit, and an air blower capable of sending air toward the radiator; and a control device capable of controlling an operation of the underfloor heating device. The control device can perform heat radiation amount control for controlling heat radiation amount from the radiator (Step S103 to Step S108 and Step S109 to Step S114) by executing flow rate control for controlling a flow rate of the heating medium (Step S104 and Step S114), air blowing amount control for controlling air blowing amount of the air blower (Step S106 and Step S112) and temperature control for controlling a temperature of the heating medium (Step S108 and Step S110).SELECTED DRAWING: Figure 3

Description

  The present invention relates to a technology for an underfloor heating system that air-conditions a building by heating air in the underfloor space.

  Conventionally, the technology of the underfloor heating system which air-conditions a building by heating the air in the underfloor space is well known. For example, as described in Patent Document 1.

  Patent Document 1 discloses an underfloor heating system including a radiator that is installed under the floor and uses a heat medium supplied from a heat source machine as a heat source, and a blower that sends out air heated by the radiator. ing. With such a configuration, the heat dissipation efficiency of the radiator can be increased, and efficient air conditioning (heating) can be performed.

  However, in such an underfloor heating system, there is room for improvement in that higher efficiency is required.

JP 2001-153380 A

  This invention is made | formed in view of the above situations, and the subject which it is going to solve is providing the underfloor heating system which can perform an air conditioning efficiently.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect of the present invention, the heat source unit that can heat and supply the heat medium is disposed in the space under the floor of the building, and the heat of the heat medium supplied from the heat source unit can be radiated. A heat dissipating unit, and an underfloor heating device including a blowing unit capable of blowing air toward the heat dissipating unit, and a control device capable of controlling the operation of the underfloor heating device, the control The apparatus includes a flow rate adjustment for adjusting a flow rate of the heat medium supplied from the heat source unit to the heat dissipation unit, an air flow rate adjustment for adjusting an air flow rate of the air blowing unit, and the heat heated by the heat source unit. It is possible to carry out temperature adjustment for adjusting the temperature of the medium to perform heat radiation amount control for adjusting the heat radiation amount from the heat radiation portion.

  In Claim 2, the temperature detection part which can detect the temperature of the measurement site | part of the said building which changes temperature according to operation | movement of the underfloor heating apparatus is further comprised, The said control apparatus is the said temperature detection part. When the detected temperature of the measurement site is lower than the low temperature side threshold value, the heat dissipation amount control is performed to increase the heat dissipation amount from the heat dissipation portion.

  According to a third aspect of the present invention, when the temperature of the measurement site detected by the temperature detection unit is equal to or higher than a high temperature side threshold set to a value equal to or higher than the low temperature side threshold, the control of the heat radiation amount is performed. And reducing the amount of heat released from the heat radiating section.

  According to a fourth aspect of the present invention, the control device performs the flow rate adjustment, the air flow rate adjustment, and the temperature adjustment in accordance with a priority order determined in consideration of energy consumption in the underfloor heating device.

  According to a fifth aspect of the present invention, the control device performs the heat radiation amount control only in a necessary time zone in which the necessity of adjusting the temperature of the indoor space of the building is high.

  In Claim 6, It further comprises the temperature detection part which can detect the temperature of the measurement site | part of the said building which changes temperature according to operation | movement of the said underfloor heating apparatus, The said control apparatus is the said required time slot | zone. When the temperature of the measurement part detected by the temperature detection unit is equal to or higher than a stop threshold in different time zones, the underfloor heating device is stopped, and the temperature of the measurement part detected by the temperature detection unit is When it is less than the stop threshold, the underfloor heating device is operated.

  In Claim 7, The temperature nonuniformity detection part which detects the presence or absence of the temperature nonuniformity in the underfloor space, The ventilation fan part for circulation which can circulate the air of the underfloor space by ventilating in the underfloor space, The control device operates the circulation fan when the temperature unevenness detecting unit detects that there is uneven temperature in the underfloor space.

  In Claim 8, while the said ventilation part can be ventilated toward the said thermal radiation part by rotating forward, it can circulate the air of the said underfloor space by rotating reversely, The said control apparatus Uses the air blower as the air blower for circulation by rotating the air blower in the reverse direction.

  As effects of the present invention, the following effects can be obtained.

  In Claim 1, it can air-condition efficiently.

  In Claim 2, when the necessity for heating is high, air conditioning can be efficiently performed by increasing the heat radiation amount.

  In Claim 3, when the necessity for heating is low, air conditioning can be efficiently performed by reducing the heat radiation amount.

  In claim 4, air conditioning can be efficiently performed in consideration of energy consumption.

  In claim 5, air conditioning can be efficiently performed according to the necessity of temperature control.

  In Claim 6, even when the necessity for temperature control is low, a certain amount of heating can be performed.

  According to the seventh aspect of the present invention, it is possible to efficiently perform air conditioning by suppressing the occurrence of uneven temperature in the underfloor space.

  In Claim 8, the number of parts can be reduced by using the air blowing part for both promotion of heat dissipation and air circulation.

Schematic which showed the whole structure of the building which has the underfloor heating system which concerns on one Embodiment of this invention. The block diagram which showed the structure regarding control of an underfloor heating system. The flowchart which showed the control aspect of the underfloor heating system. The figure which showed the thermal load requested | required in a certain day for every time.

  Below, the structure of the underfloor heating system 100 which concerns on one Embodiment of this invention is demonstrated using FIG.1 and FIG.2.

  The underfloor heating system 100 indirectly warms a room (such as a living room) of the building 1 by heating the underfloor space 4 of the building 1. In the present embodiment (see FIG. 1), a two-story house is shown as an example of the building 1. In the building 1, an underfloor space 4 is formed under the floor 3 of the first floor portion 2. The underfloor heating system 100 mainly includes an underfloor heating device 10, an underfloor temperature sensor 20, and a control device 30.

  The underfloor heating device 10 consumes electric power and warms the underfloor space 4. The underfloor heating apparatus 10 mainly includes a heat pump unit 11, a radiator 12, a pipe 13, and a blower 14.

  The heat pump unit 11 consumes electric power to generate (produce) heat. The heat pump unit 11 is installed outside the building 1 so as to be adjacent to the building 1. The heat pump unit 11 includes a compressor, an expansion valve, an evaporator, a heat exchanger, and the like. The heat pump unit 11 can generate heat by appropriately compressing and expanding an internal heat medium. Moreover, the heat pump unit 11 can warm water using the generated heat in the heat exchanger. Further, the heat pump unit 11 includes a pump 11 a that can pump water (hot water) as a heat medium warmed in the heat pump unit 11.

  The radiator 12 radiates the heat of hot water supplied from the heat pump unit 11. The radiator 12 includes piping through which hot water can flow, fins for expanding the heat transfer area, and the like. A plurality of radiators 12 are installed in the underfloor space 4. The position where the heat radiator 12 is installed is appropriately determined based on the floor plan of the building 1 or the like.

  The pipe 13 is a flow path for circulating hot water between the heat pump unit 11 and the radiator 12. The piping 13 is provided so as to connect the heat pump unit 11 (more specifically, the heat exchanger of the heat pump unit 11) and the plurality of radiators 12 to each other.

  The blower 14 consumes electric power and sends out air. The blower 14 includes a motor serving as a driving source, an impeller capable of sending out (blowering) air by rotating with a driving force of the motor, and the like. One blower 14 is installed near each of the plurality of radiators 12. The direction of the blower 14 is appropriately adjusted so that air can be blown toward the nearby radiator 12 by rotating the impeller forward. Moreover, the air blower 14 can blow in the direction opposite to the radiator 12 in the vicinity by rotating the impeller reversely.

  The underfloor temperature sensor 20 detects the temperature of the underfloor space 4. A plurality of underfloor temperature sensors 20 are installed in the underfloor space 4. The position where the underfloor temperature sensor 20 is installed is appropriately determined based on the floor plan of the building 1 or the like. The underfloor temperature sensor 20 is attached to a steel bundle or the like (not shown), for example.

  The control device 30 controls the operation of the underfloor heating system 100. The control device 30 is mainly composed of an arithmetic processing device such as a CPU, a storage device such as a RAM and a ROM, an input / output device such as an I / O, and a display device such as a monitor. Various information, programs, and the like for controlling the operation of the underfloor heating system 100 are stored in the control device 30 in advance. The control device 30 is connected to the heat pump unit 11, the blower 14, and the underfloor temperature sensor 20.

  The control device 30 is connected to the underfloor temperature sensor 20 and can acquire the detection value of the underfloor temperature sensor 20 (the temperature of the underfloor space 4). The control device 30 is connected to the heat pump unit 11 and the blower 14 and can control operations of the heat pump unit 11 and the blower 14.

  In the underfloor heating system 100 configured as described above, the control device 30 can control (heat) the indoor temperature of the building 1 by appropriately controlling the operations of the heat pump unit 11 and the blower 14.

  Specifically, the water (hot water) warmed in the heat pump unit 11 is supplied to the radiator 12 by the pump 11a. The radiator 12 warms the underfloor space 4 by dissipating the heat of the supplied hot water into the underfloor space 4. Moreover, when the air blower 14 is actuated and air is blown toward the radiator 12, heat dissipation from the radiator 12 is promoted, and the heat radiation efficiency can be improved. Thus, the indoor temperature of the building 1 can be raised by warming the underfloor space 4.

  The control device 30 controls the operation of the heat pump unit 11 to adjust the temperature of water (hot water) heated in the heat pump unit 11 and the flow rate of hot water supplied from the heat pump unit 11 to the radiator 12. be able to. Moreover, the control apparatus 30 can change the rotation direction (namely, ventilation direction) of the impeller of the said air blower 14, and the rotation of the impeller of the said air blower 14 by controlling the operation | movement of the air blower 14. FIG.

  Below, the control method of the underfloor heating system 100 is demonstrated using FIG.

  In step S101 in FIG. 3, the control device 30 determines whether or not the current time is included in the activity time zone. Here, the “activity time zone” is a time zone in which a person is considered to be active in the building 1, and a time zone in which the necessity of air conditioning (heating) of the building 1 is considered to be relatively high. It is. For example, as an activity time zone, a time zone in which a resident of the building 1 (house) is getting up and is supposed to be at home can be set. The activity time zone is determined in advance and stored in the control device 30.

When it is determined that the current time is included in the activity time zone, the control device 30 proceeds to step S102.
If the control device 30 determines that the current time is not included in the activity time zone, the control device 30 proceeds to step S118.

  In step S <b> 102, the control device 30 detects the temperature of the underfloor space 4 (hereinafter simply referred to as “underfloor temperature”). In the present embodiment, the control device 30 calculates an average value of detection values of the plurality of underfloor temperature sensors 20, and sets the average value as the underfloor temperature.

  Furthermore, the control device 30 compares the detected underfloor temperature with a target value for the underfloor temperature. Here, the “target value” is a value of the underfloor temperature determined based on a desired value (target value) of the indoor temperature of the building 1. The desired value (target value) of the room temperature in the building 1 can be arbitrarily set by a person (resident, etc.) in the building 1 using an operation tool (such as a remote controller) (not shown), for example.

When it is determined that the underfloor temperature is less than “target value—first threshold value”, the control device 30 proceeds to step S103.
If the controller 30 determines that the underfloor temperature is equal to or higher than “target value + second threshold value”, the process proceeds to step S109.
If the controller 30 determines that the underfloor temperature is greater than or equal to “target value−first threshold” and less than “target value + second threshold”, the process proceeds to step S115.

  The “first threshold value” and the “second threshold value” are values set to determine whether the underfloor temperature is significantly different from the target value (the underfloor temperature needs to be adjusted). Yes, it is an arbitrarily determined value. For example, a value of “3 (° C.)” can be set as the first threshold value and the second threshold value.

  In step S103, the control device 30 determines whether or not the flow rate of the hot water supplied from the heat pump unit 11 to the radiator 12 can be increased. Specifically, when the pump 11a is not pumping hot water at the maximum flow rate, the control device 30 determines that the flow rate of the hot water can be increased. Moreover, when the pump 11a is pumping hot water at the maximum flow rate, the control device 30 determines that the flow rate of the hot water cannot be increased.

When determining that the flow rate of the hot water can be increased, the control device 30 proceeds to step S104.
Moreover, when it determines with the control apparatus 30 not being able to increase the flow volume of warm water, it transfers to step S105.

  In step S104, the control device 30 controls the operation of the pump 11a to increase the flow rate of the hot water supplied from the heat pump unit 11 to the radiator 12 by an appropriate amount. The flow rate to be increased can be arbitrarily set. By increasing the flow rate of the hot water supplied to the radiator 12, the heat dissipated from the radiator 12 can be increased, and the temperature of the underfloor space 4 can be increased.

  After performing the process of step S104, the control device 30 proceeds to step S115.

  In step S105, the control device 30 determines whether or not the blower 14 is stopped.

When it is determined that the blower 14 is stopped, the control device 30 proceeds to step S106.
If the control device 30 determines that the blower 14 is not stopped (operated), the control device 30 proceeds to step S107.

  In step S <b> 106, the control device 30 operates the blower 14. Specifically, the control device 30 rotates the impeller of the blower 14 in the forward direction and blows air toward the radiator 12. As a result, heat dissipation from the radiator 12 is promoted, and the temperature of the underfloor space 4 can be increased.

  After performing the process of step S106, the control device 30 proceeds to step S115.

  In step S <b> 107, the control device 30 determines whether or not the temperature of water (hot water) heated in the heat pump unit 11 can be increased. Specifically, when the set temperature of the heat pump unit 11 (the set temperature of water (hot water) heated by the heat pump unit 11) is not the upper limit, the control device 30 can increase the temperature of the hot water. judge. In addition, when the set temperature of the heat pump unit 11 is the upper limit, the control device 30 determines that the temperature of the hot water cannot be increased.

When it is determined that the temperature of the hot water can be increased, the control device 30 proceeds to step S108.
Moreover, when it determines with the control apparatus 30 not being able to raise the temperature of warm water, it transfers to step S115.

  In step S108, the control device 30 increases the set temperature of the heat pump unit 11. Thereby, since the temperature of the hot water supplied to the radiator 12 rises, the heat dissipated from the radiator 12 can be increased, and the temperature of the underfloor space 4 can be raised.

  On the other hand, in step S109 transferred from step S102, the control device 30 determines whether or not the temperature of water (hot water) heated in the heat pump unit 11 can be reduced. Specifically, when the set temperature of the heat pump unit 11 is not the lower limit, the control device 30 determines that the temperature of the hot water can be reduced. Moreover, when the preset temperature of the heat pump unit 11 is the lower limit, the control device 30 determines that the temperature of the hot water cannot be reduced.

When it is determined that the temperature of the hot water can be reduced, the control device 30 proceeds to step S110.
Moreover, when it determines with the control apparatus 30 not being able to reduce the temperature of warm water, it transfers to step S111.

  In step S110, the control device 30 decreases the set temperature of the heat pump unit 11. Thereby, since the temperature of the hot water supplied to the radiator 12 is lowered, the heat dissipated from the radiator 12 can be reduced, and the temperature of the underfloor space 4 can be lowered.

  In step S111, the control device 30 determines whether or not the blower 14 is operating.

When it is determined that the blower 14 is operating, the control device 30 proceeds to step S112.
Moreover, when it determines with the air blower 14 not operating (it has stopped), the control apparatus 30 transfers to step S113.

  In step S112, the control device 30 stops the blower 14. Thereby, the heat dissipated from the radiator 12 can be reduced, and the temperature of the underfloor space 4 can be lowered.

  In step S113, the control device 30 determines whether or not the flow rate of the hot water supplied from the heat pump unit 11 to the radiator 12 can be reduced. Specifically, when the pump 11a is not pumping hot water at the minimum flow rate, the control device 30 determines that the flow rate of the hot water can be reduced. In addition, when the pump 11a is pumping hot water at the minimum flow rate, the control device 30 determines that the flow rate of the hot water cannot be reduced.

When determining that the flow rate of the hot water can be decreased, the control device 30 proceeds to step S114.
Moreover, when it determines with the control apparatus 30 not being able to reduce the flow volume of warm water, it transfers to step S115.

  In step S114, the control device 30 controls the operation of the pump 11a to decrease the flow rate of the hot water supplied from the heat pump unit 11 to the radiator 12 by an appropriate amount. In addition, the flow volume to reduce can be set arbitrarily. By reducing the flow rate of the hot water supplied to the radiator 12, the heat dissipated from the radiator 12 can be reduced, and the temperature of the underfloor space 4 can be lowered.

  In step S115 transferred from step S102 or the like, the control device 30 determines whether or not temperature unevenness occurs in the underfloor space 4. Specifically, if the difference between the maximum value and the minimum value among the detection values detected by the plurality of underfloor temperature sensors 20 is equal to or greater than a predetermined value (for example, 10 (° C.) or greater), the control device 30 stores the underfloor space 4. It is determined that temperature unevenness has occurred.

When it is determined that the temperature unevenness is generated in the underfloor space 4, the control device 30 proceeds to step S116.
Further, when the control device 30 determines that the temperature unevenness does not occur in the underfloor space 4, the present control is terminated.

  In step S116, the control device 30 determines whether or not the blower 14 is stopped.

When it is determined that the blower 14 is stopped, the control device 30 proceeds to step S117.
Moreover, the control apparatus 30 complete | finishes this control, when it determines with the air blower 14 not having stopped (it is operating).

  In step S117, the control device 30 operates the blower 14. Specifically, the control device 30 rotates the impeller of the blower 14 in the reverse direction and blows air in the direction opposite to the radiator 12. Thereby, the air in the underfloor space 4 is circulated, and the temperature unevenness of the underfloor space 4 is suppressed.

  The control apparatus 30 complete | finishes this control, after performing the process of the said step S117.

  In step S118 that has shifted from step S101, the control device 30 detects the underfloor temperature. Furthermore, the control device 30 determines whether or not the detected underfloor temperature is equal to or higher than the minimum underfloor temperature. Here, the “minimum underfloor temperature” is the temperature of the underfloor space 4 that should be secured at a minimum. The value of the minimum underfloor temperature can be arbitrarily set in consideration of the structure of the building 1 and the like.

When it is determined that the detected underfloor temperature is equal to or higher than the minimum underfloor temperature, the control device 30 proceeds to step S119.
If control device 30 determines that the detected underfloor temperature is lower than the lowest underfloor temperature, control device 30 proceeds to step S120.

  In step S119, the control device 30 stops the heat pump unit 11 and the blower 14.

  The control apparatus 30 complete | finishes this control, after performing the process of the said step S119.

  In step S120, the control device 30 controls the operation of the heat pump unit 11 and the like to perform the maintenance operation. Here, the “maintenance operation” is an operation of the heat pump unit 11 or the like for keeping the temperature of the underfloor space 4 at or above the minimum underfloor temperature. In the present embodiment, the control device 30 operates the heat pump unit 11 as a maintenance operation and stops the blower 14. At this time, the control device 30 sets the set temperature of the heat pump unit 11 as low as possible and reduces the flow rate of the hot water supplied from the heat pump unit 11 to the radiator 12 as much as possible. Thus, since the maintenance operation only needs to keep the temperature of the underfloor space 4 to a minimum (that is, not less than the minimum underfloor temperature), the power consumption of the heat pump unit 11 and the like is made as small as possible.

  The control apparatus 30 complete | finishes this control, after performing the process of the said step S120.

  The control device 30 performs air conditioning of the building 1 by repeating the above-described control (see FIG. 3) every predetermined time (for example, every 30 minutes).

  As described above, the control device 30 adjusts the temperature of the underfloor space 4 by appropriately controlling the operation of the heat pump unit 11 and the like when the current time is the activity time zone (Yes in Step S101) (Step S102). To step S117).

  Specifically, when the underfloor temperature is significantly lower than the target value (when the underfloor temperature is lower than “target value—first threshold” in step S102), the control device 30 performs the heat pump unit 11 or the like. Is controlled to increase the underfloor temperature (from step S103 to step S108). At this time, the control device 30 first preferentially increases the flow rate of the hot water (step S103 and step S104). Moreover, the control apparatus 30 operates the air blower 14, when the flow volume of warm water cannot be increased (step S105 and step S106). Furthermore, the control apparatus 30 raises the preset temperature (temperature of warm water) of the heat pump unit 11 when the air blower 14 is already operating.

  Thus, when raising the underfloor temperature, the control device 30 preferentially increases the flow rate of hot water (flow rate adjustment), operates the blower 14 (air flow rate adjustment), and increases the temperature of the hot water (temperature adjustment). Run. This is because, in general, the increase in power consumption (energy consumption) accompanying the increase in the flow rate of hot water (increase in the flow rate by the pump 11a) is the smallest, and the increase in power consumption accompanying the increase in the temperature of hot water is the largest. . That is, by providing such a priority order considering power consumption, the underfloor temperature can be raised while suppressing an increase in power consumption as much as possible.

  In addition, when the underfloor temperature greatly exceeds the target value (when the underfloor temperature is “target value + second threshold” or more in step S102), the control device 30 controls the heat pump unit 11 and the like. The underfloor temperature is lowered (from step S109 to step S114). At this time, the control device 30 first decreases the set temperature (temperature of hot water) of the heat pump unit 11 (step S109 and step S110). Moreover, the control apparatus 30 stops the air blower 14, when the temperature of warm water cannot be reduced (step S111 and step S112). Furthermore, the control apparatus 30 reduces the flow volume of warm water, when the air blower 14 has already stopped.

  Thus, when lowering the underfloor temperature, the control device 30 preferentially decreases the temperature of the hot water (temperature adjustment), stops the blower 14 (air flow rate adjustment), and decreases the flow rate of the hot water (flow rate adjustment). Run. By providing such priorities in consideration of power consumption, the underfloor temperature can be lowered while reducing the power consumption (energy consumption) as much as possible.

  Further, when the temperature unevenness is generated in the underfloor space 4 (Yes in Step S115), the control device 30 rotates the blower 14 in the reverse direction and rotates the underfloor space 4 if the blower 14 is stopped (Yes in Step S116). The air inside is circulated (step S117). Thereby, the temperature unevenness of the underfloor space 4 can be suppressed and the heating efficiency can be improved.

  On the other hand, if the current time is not the active time zone (No in step S101), the control device 30 controls the operation of the heat pump unit 11 and the like so as to keep the underfloor temperature above the minimum underfloor temperature (from step S118 to step S118). Up to S120). Thereby, it is possible to prevent the temperature of the underfloor space 4 from being excessively lowered, and it is possible to prevent a decrease in heating efficiency.

  Below, the example which performed the air conditioning (heating) of the building 1 using the above-mentioned underfloor heating system 100 is demonstrated using FIG.3 and FIG.4. In the example shown in FIG. 4, adjustment of the flow rate of the hot water supplied to the radiator 12 (step S103, step S104, step S113, and step S114 in FIG. 3) is not performed for the sake of simplicity.

  FIG. 4 shows the heat load (the amount of heat that needs to be generated) required for the underfloor heating system 100 for each hour of a certain day. For example, in the time zone T1 (from 2 o'clock to 6 o'clock), since the resident of the building 1 is sleeping (not in the activity time zone), there is no need for heating and the heat load is zero. In addition, since the temperature of the building 1 decreases during the night, a large heat load is required in the time zone T2 (from 6 o'clock to 8 o'clock). Further, the daytime time zone T4 (from 12:00 to 16:00) is a time zone with a large amount of solar radiation, and the building 1 is warmed by solar radiation, so that the required heat load is small.

  With respect to such a heat load, the control device 30 determines that it is not an active time zone (No in step S101) in the time zone T1, and stops the operation (step S119). Moreover, in the time zone T2, since the temperature (underfloor temperature) of the building 1 is lowered at night (in step S102, the underfloor temperature is less than “target value—first threshold value”), the control device 30 causes the blower 14 to And the temperature of the hot water is raised (steps S106 and S108).

  In the time zone T3 (from 8 o'clock to 12 o'clock), when the underfloor temperature rises to some extent (in step S102, the underfloor temperature is equal to or higher than the “target value + second threshold value”), the control device 30 reduces the hot water temperature. Power consumption is reduced (step S110). Furthermore, in the time zone T4 where the amount of solar radiation is large, when the underfloor temperature is still high, the control device 30 stops the blower 14 (step S112). Further, when the temperature unevenness occurs in the underfloor space (Yes in step S115), the blower 14 is rotated in the reverse direction to circulate the air in the underfloor space 4 (step S117).

  When the heat load increases in the time period T5 (from 16:00 to 2 o'clock) when the solar radiation amount and the outside air temperature decrease (in step S102, the underfloor temperature is less than "target value-first threshold value"), the control device 30 First, the blower 14 is operated (step S106) to improve the heat radiation amount. When the operation of the blower 14 is not sufficient, the control device 30 further increases the hot water temperature (step S108).

  Thus, the underfloor heating system 100 can perform efficient air conditioning (heating) by combining the adjustment of the flow rate of hot water, the operation of the blower 14, and the adjustment of the hot water temperature. In addition, by controlling the heat pump unit 11 and the like based on the priority order from the viewpoint of energy saving, energy saving of the air conditioning can be achieved.

As described above, the underfloor heating system 100 according to the present embodiment is
A heat pump unit 11 (heat source unit) capable of heating and supplying the heat medium (water), disposed in the underfloor space 4 of the building 1, and radiating heat of the heat medium supplied from the heat pump unit 11 An underfloor heating device 10 including a radiator 12 (heat radiating unit) capable of blowing air and a blower 14 (blower unit) capable of blowing air toward the radiator 12;
A control device 30 capable of controlling the operation of the underfloor heating device 10;
Comprising
The control device 30 includes:
Flow rate adjustment (step S104 and step S114) for adjusting the flow rate of the heat medium supplied from the heat pump unit 11 to the radiator 12;
Blowing amount adjustment (step S106 and step S112) for adjusting the blowing amount of the blower 14,
Temperature adjustment (step S108 and step S110) for adjusting the temperature of the heat medium heated by the heat pump unit 11;
It is possible to perform the heat radiation amount control (from step S103 to step S108 and from step S109 to step S114) for adjusting the heat radiation amount from the radiator 12 by executing the above.
By comprising in this way, air conditioning can be performed efficiently. That is, efficient air conditioning becomes possible by combining the flow rate adjustment (step S104 and step S114), the air flow rate adjustment (step S106 and step S112), and the temperature adjustment (step S108 and step S110).

The underfloor heating system 100
It further comprises an underfloor temperature sensor 20 (temperature detector) capable of detecting the temperature of the measurement site (underfloor space 4) of the building 1 that changes in temperature according to the operation of the underfloor heating device 10,
The control device 30 includes:
When the temperature of the underfloor space 4 detected by the underfloor temperature sensor 20 is less than “target value—first threshold” (low temperature side threshold), the heat dissipation amount control is performed to release the heat from the radiator 12. It increases the amount of heat.
By comprising in this way, when the necessity for heating is high, it can air-condition efficiently by making the heat dissipation increase.

In addition, the control device 30
When the temperature of the underfloor space 4 detected by the underfloor temperature sensor 20 is equal to or greater than “target value + second threshold” (high temperature side threshold) set to a value equal to or higher than the low temperature side threshold, the heat dissipation amount Control is performed to reduce the amount of heat released from the radiator 12.
By comprising in this way, when the necessity for heating is low, it can air-condition efficiently by reducing the heat radiation amount.

In addition, the control device 30
The flow rate adjustment, the air flow rate adjustment, and the temperature adjustment are executed according to the priority order determined in consideration of power consumption (energy consumption) in the underfloor heating device 10.
With this configuration, it is possible to efficiently perform air conditioning in consideration of energy consumption. That is, not only air conditioning (heating) but also energy saving can be achieved in consideration of energy consumption.

In addition, the control device 30
The heat radiation amount control is performed only in an activity time zone (necessary time zone) in which the necessity of temperature control of the indoor space of the building 1 is considered high.
By comprising in this way, it can air-condition efficiently according to the necessity of temperature control.

The underfloor heating system 100
It further comprises an underfloor temperature sensor 20 (temperature detector) capable of detecting the temperature of the measurement site (underfloor space 4) of the building 1 that changes in temperature according to the operation of the underfloor heating device 10,
The control device 30 includes:
In a time zone different from the activity time zone,
When the temperature of the underfloor space 4 detected by the underfloor temperature sensor 20 is equal to or higher than the minimum underfloor temperature (stop threshold), the underfloor heating device 10 is stopped,
When the temperature of the underfloor space 4 detected by the underfloor temperature sensor 20 is lower than the lowest underfloor temperature, the underfloor heating device 10 is operated.
By configuring in this way, even when the need for temperature adjustment is low, a certain amount of heating can be performed. Thereby, it is possible to prevent the temperature in the building 1 from being excessively lowered, and when the air conditioning (heating) is performed during the activity time zone, the temperature in the building 1 can be quickly increased.

The underfloor heating system 100
An underfloor temperature sensor 20 (temperature unevenness detector) for detecting the presence or absence of temperature unevenness in the underfloor space 4;
A fan 14 (circulation fan) capable of circulating the air in the underfloor space 4 by blowing air in the underfloor space 4;
Further comprising
The control device 30 includes:
When it is detected by the underfloor temperature sensor 20 that the underfloor space 4 has uneven temperature, the blower 14 is operated.
By comprising in this way, generation | occurrence | production of the temperature nonuniformity of the underfloor space 4 can be suppressed, and air conditioning can be performed efficiently.

The blower 14 is
It is possible to blow air toward the radiator 12 by rotating forward, and it is possible to circulate the air in the underfloor space 4 by rotating backward,
The control device 30 includes:
The blower 14 is used as the circulation blower by rotating the blower 14 in the reverse direction.
By configuring in this way, the number of components can be reduced by using the blower 14 for both promotion of heat dissipation and air circulation.

The heat pump unit 11 according to the present embodiment is an embodiment of the heat source unit according to the present invention.
Moreover, the heat radiator 12 which concerns on this embodiment is one Embodiment of the thermal radiation part which concerns on this invention.
Moreover, the air blower 14 which concerns on this embodiment is one Embodiment of the ventilation part which concerns on this invention, and the ventilation part for circulation.
The underfloor space 4 according to the present embodiment is an embodiment of the measurement site according to the present invention.
The underfloor temperature sensor 20 according to the present embodiment is an embodiment of the temperature detection unit and the temperature unevenness detection unit according to the present invention.
The “target value—first threshold” according to the present embodiment is an embodiment of the low temperature side threshold according to the present invention.
The “target value + second threshold value” according to the present embodiment is an embodiment of the high temperature side threshold value according to the present invention.
Moreover, the activity time slot | zone which concerns on this embodiment is one Embodiment of the required time slot | zone which concerns on this invention.
The minimum underfloor temperature according to the present embodiment is an embodiment of the stop threshold according to the present invention.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said structure, A various change is possible within the range of the invention described in the claim.

  For example, in the present embodiment, the heat pump unit 11 is illustrated as an apparatus (heat source unit) for heating the heat medium (water), but the present invention is not limited to this, and other various heat sources may be used. it can.

  In the present embodiment, the activity time zone (necessary time zone according to the present invention) considered to be highly necessary for temperature adjustment is determined in advance, but the present invention is not limited to this. . For example, it is possible to determine whether there is a person in the building 1 using a human sensor or the like, and when there is a person, it is possible to determine that it is a time zone in which the necessity of temperature adjustment is high. .

  In the present embodiment, the blower 14 has a function of blowing air toward the radiator 12 (a function of promoting heat dissipation) and a function of circulating the air in the underfloor space 4. The present invention is not limited to this. That is, it is possible to separately provide a blower for promoting heat dissipation and a blower for circulating the air in the underfloor space 4.

  In the present embodiment, the control device 30 operates or stops (turns on or off) the blower 14 in the normal rotation or reverse rotation, but the present invention is not limited to this. For example, the control device 30 can further finely control the amount of air blown by the blower 14 (specifically, finely adjust the rotational speed of the impeller).

  Moreover, in this embodiment, although operation | movement of the underfloor heating apparatus 10 shall be controlled based on the temperature of the underfloor space 4 of the building 1, this invention is not limited to this. That is, the operation of the underfloor heating device 10 is controlled not only based on the underfloor space 4 but also based on the temperature of a portion whose temperature changes according to the operation of the underfloor heating device 10 (for example, the floor 3 or the first floor portion 2). It is also possible.

  In addition, the priority order of the flow rate adjustment, the air flow rate adjustment, and the temperature adjustment shown in the present embodiment is an example, and it is possible to arbitrarily set the priority order in consideration of the energy consumption and usage mode of each device. is there.

  In the present embodiment, the underfloor heating apparatus 10 is operated by consuming electric power, but the present invention is not limited to this, and is operated by consuming energy other than electric power (for example, fuel). You may do.

DESCRIPTION OF SYMBOLS 1 Building 10 Underfloor heating apparatus 11 Heat pump unit 12 Radiator 13 Piping 14 Blower 20 Underfloor temperature sensor 30 Control apparatus 100 Underfloor heating system

Claims (8)

Heat source part capable of heating and supplying a heat medium, a heat dissipating part arranged in a space under the floor of a building and capable of dissipating heat of the heat medium supplied from the heat source part, and the heat dissipating part An underfloor heating device having a blowing section capable of blowing air toward the
A control device capable of controlling the operation of the underfloor heating device;
Comprising
The controller is
A flow rate adjustment for adjusting a flow rate of the heat medium supplied from the heat source unit to the heat dissipation unit,
Blowing volume adjustment for adjusting the blowing volume of the blowing section;
Temperature adjustment for adjusting the temperature of the heat medium heated by the heat source unit;
It is possible to perform a heat radiation amount control for adjusting the heat radiation amount from the heat radiation portion by executing
Underfloor heating system. Further comprising a temperature detection unit capable of detecting the temperature of the measurement part of the building that changes in temperature according to the operation of the underfloor heating device;
The controller is
When the temperature of the measurement site detected by the temperature detection unit is less than a low temperature side threshold value, the heat dissipation amount control is performed to increase the heat dissipation amount from the heat dissipation unit.
The underfloor heating system according to claim 1. The controller is
When the temperature of the measurement site detected by the temperature detection unit is equal to or higher than the high temperature side threshold set to a value equal to or higher than the low temperature side threshold, the heat dissipation amount control is performed, and the heat dissipation amount from the heat dissipation unit is determined. Decrease,
The underfloor heating system according to claim 2. The controller is
The flow rate adjustment, the air flow rate adjustment, and the temperature adjustment are executed according to the priority order determined in consideration of energy consumption in the underfloor heating device.
The underfloor heating system as described in any one of Claim 1- Claim 3. The controller is
The heat radiation amount control is performed only in a necessary time zone in which the necessity of temperature control of the indoor space of the building is considered high.
The underfloor heating system as described in any one of Claim 1- Claim 4. Further comprising a temperature detection unit capable of detecting the temperature of the measurement part of the building that changes in temperature according to the operation of the underfloor heating device;
The controller is
In a time zone different from the required time zone,
When the temperature of the measurement site detected by the temperature detection unit is equal to or higher than a stop threshold, the underfloor heating device is stopped,
When the temperature of the measurement site detected by the temperature detector is less than the stop threshold, the underfloor heating device is operated.
The underfloor heating system according to claim 5. A temperature unevenness detecting unit for detecting the presence or absence of temperature unevenness in the underfloor space;
A circulation blower capable of circulating the air in the underfloor space by blowing air in the underfloor space;
Further comprising
The controller is
When the temperature unevenness detection unit detects that there is uneven temperature in the underfloor space, the circulation fan is activated.
The underfloor heating system according to any one of claims 1 to 6. The blowing section is
It is possible to blow air toward the heat radiating part by rotating forward, and it is possible to circulate the air in the underfloor space by rotating reversely,
The controller is
The air blower is used as the circulation air blower by rotating the air blower in the reverse direction.
The underfloor heating system according to claim 7.

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