JP2019158263A - Floor heating system - Google Patents

Abstract

To provide a floor heating system which can prevent or alleviate low-temperature burn with simple control.SOLUTION: A floor heating system X includes: a floor material 1; a panel body 6; a heating part 4 which is provided inside the panel body 6 and to which a heat medium is supplied; a cooling part 5 which is provided inside the panel body 6 and reduces a heat quantity of the panel body 6; a measurement part K which measures a heat medium inflow temperature and an outflow temperature; a detection part 2 which detects contact of a detection object formed as a movable body with the floor material 1; a determination part 20; and a control part 10. The control part 10 actuates the cooling part 5 when the determination part 20 determines that a floor surface temperature exceeds a low-temperature burn determination threshold.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a floor heating system, and more particularly to a floor heating system that prevents low-temperature burns.

  A floor heating system is known as a system for heating a room (see, for example, Patent Documents 1 and 2). The floor heating system can uniformly warm the interior of the room with radiant heat from the flooring material, but the person who is in contact with the floor surface is likely to be in a state where the floor surface temperature is above a predetermined temperature. There is a risk of low temperature burns if continued for a long time. In order to prevent this low-temperature burn, techniques as disclosed in Patent Documents 1 and 2 are disclosed.

  In the invention of Patent Document 1, a stone layer is provided on the inner side of a cloth foundation, a base concrete layer in which a hot water pipe is embedded is provided on the stone layer, and a flooring is provided on the base concrete layer. As a result, the underground heat is stored in the stone layer, and the temperature change of the foundation concrete layer with respect to the outside air temperature is reduced, so it is possible to reduce the amount of heat in the hot water pipe, and as a result, low temperature burns can be prevented. ing.

  The invention of Patent Document 2 prevents low-temperature burns by changing energization time to a plurality of heater units composed of an electric carpet. Specifically, if a person in contact with the heater unit is detected by a human detection sensor and there is a risk of low-temperature burns when sitting for a certain period of time, the energization time to the detected heater unit is reduced, and This increases the energization time to the heater unit in which no is detected. This describes that low temperature burns can be prevented while keeping the room temperature constant.

JP 2007-198122 A JP 2007-32972 A

  In the floor heating system described in Patent Document 1, a basic structure using a stone layer is required as a building material, and in order to install the floor heating system in an existing house, a large renovation is required, and the degree of freedom of installation is low. . Even if the heat quantity of the hot water pipe is reduced, the floor surface temperature gradually rises, so that there is still a possibility that low temperature burns will occur if the temperature exceeds a predetermined temperature for a long time.

  In the floor heating system described in Patent Document 2, even when the energization time to the heater unit is reduced, the floor surface temperature hardly decreases while the heater unit is energized. If it continues for a long time, there is a risk of low temperature burns. And since it is necessary to carry out energization control separately with respect to several heater units, the control method is complicated.

  Therefore, a floor heating system that can prevent or mitigate low temperature burns by simple control is desired.

  The characteristic configuration of the floor heating system according to the present invention includes a floor material laid in a room, a panel body that is provided below the floor material and that heats the floor material, and is provided inside the panel body. A heating unit that increases the amount of heat of the panel body by supplying a heat medium; a cooling unit that is provided inside the panel body and decreases the amount of heat of the panel body by supplying a refrigerant; and A measuring unit that measures the inlet and outlet temperatures of the heating medium with respect to the heating unit, or the surface temperature of the flooring; a detection unit that detects that a detection target as a moving object is in contact with the flooring; and Based on the measurement result of the measurement unit and the detection result of the detection unit, it is supplied to a determination unit that determines whether or not a predetermined low-temperature burn determination threshold for the detection target is exceeded, and the heating unit and the cooling unit. The heat medium And a control unit for controlling the flow of the refrigerant, the control unit is configured when it is determined that the low-temperature burn exceeds the determination threshold by the determination unit, in that the circulating refrigerant to the cooling unit.

  In this configuration, a heating unit to which a heat medium is supplied and a cooling unit to which a refrigerant is supplied are provided inside the panel body. Since this cooling unit reduces the amount of heat of the panel body when the refrigerant is supplied, the amount of heat transmitted from the heating unit to the flooring through the panel body can be reduced. And since the cooling part of this structure is provided in the inside of a panel main body, it becomes possible to reduce the calorie | heat amount of a panel main body directly, and cooling efficiency is high. In addition, since the control unit of this configuration operates the cooling unit when it is determined by the determination unit that the low temperature burn determination threshold is exceeded, the detection target that is in contact with the flooring material for a long time by simple control ( For example, the temperature can be lowered to a temperature range that does not cause low temperature burns.

  Further, the determination unit of the present configuration includes the detection temperature detected by the detection unit and the inlet and outlet temperatures of the heat medium or the surface temperature of the flooring material (hereinafter referred to as “floor surface temperature”) measured by the measurement unit. It is determined whether or not a predetermined low-temperature burn determination threshold is exceeded based on the state of contact with the floor material. That is, the floor surface temperature estimated from the inlet and outlet temperatures of the heat medium or the floor surface temperature directly measured and the contact time with the floor material to be detected are accurately reflected. Can be increased. In this way, the floor heating system with this configuration prevents or mitigates low-temperature burns by reducing the detection target that has been in contact with the flooring material for a long time to a temperature range that does not cause low-temperature burns, based on accurate determination results. can do.

  Another characteristic configuration is that the cooling unit includes a hollow member that is provided on at least one of the lower side and the side of the heating unit and through which the refrigerant can flow.

  If the cooling unit is configured by a hollow member through which a refrigerant can flow as in this configuration, the cooling unit can be provided easily. Furthermore, the cooling part of this structure is comprised with the hollow member provided in at least one of the lower side and side of a heating part. For this reason, when the floor surface is heated, the heat quantity of the heating part becomes difficult to move downward or to the side due to the heat insulating effect of the hollow member through which the refrigerant does not flow, and the amount of heat that moves upward increases. Can be heated quickly. In addition, when the temperature of the floor surface is decreased, the refrigerant flows through the hollow member, so that the amount of heat of the heating unit moves downward or laterally, and the floor surface can be quickly cooled.

  Another characteristic configuration is that the control unit stops the supply of the heat medium to the heating unit when the determination unit determines that the low temperature burn determination threshold is exceeded.

  If the supply of the heat medium to the heating unit is stopped when the low-temperature burn determination threshold is exceeded as in this configuration, the floor surface can be quickly cooled. Therefore, it is possible to prevent or mitigate low temperature burns quickly.

  In another characteristic configuration, the measurement unit measures the input temperature, the output temperature, and the room temperature, and the determination unit is based on the input temperature, the output temperature, and the room temperature that are measured by the measurement unit. The surface temperature of the flooring is estimated, and based on the estimated surface temperature, it is determined whether or not the low temperature burn determination threshold is exceeded.

  The floor surface temperature is heated from below by the heating unit and cooled from above by room temperature. Therefore, as in the present configuration, if the floor surface temperature is estimated on the basis of the inlet and outlet temperatures of the heat medium and the room temperature, the determination unit more accurately determines whether or not the low temperature burn determination threshold is exceeded. be able to.

  In another characteristic configuration, the measurement unit measures the input temperature and the output temperature, the room temperature, and the flow rate of the heating medium, and the determination unit measures the input temperature and the output temperature measured by the measurement unit. The surface temperature of the flooring is estimated based on the flow rate and the room temperature, and it is determined whether or not the low temperature burn determination threshold is exceeded based on the estimated surface temperature.

  Even when the temperature of the heating medium is the same, the amount of heat output from the heating unit differs if the flow rate of the heating medium is different. Therefore, as in this configuration, if the surface temperature of the flooring is estimated on the basis of the inlet and outlet temperatures of the heat medium, the flow rate, and the room temperature, the determination unit determines whether or not the low temperature burn determination threshold is exceeded. It can be done more accurately.

  Another characteristic configuration is that the detection unit includes a pressure sensor provided between the floor material and the panel body.

  As in this configuration, if the detection target is detected by the pressure sensor provided between the flooring and the panel body, the pressure sensor classifies whether it is a static load or a dynamic load. It can be detected reliably. Thereby, there is no inconvenience that the detection target cannot be detected when the detection target is hidden by a shielding object such as a human detection sensor.

It is a whole lineblock diagram of a floor heating system. It is sectional drawing of a heating unit. It is a block diagram of a floor heating system. It is a control flow figure of a floor heating system. It is explanatory drawing of a low-temperature burn determination threshold value. It is sectional drawing of the heating unit which concerns on another embodiment.

  Hereinafter, an embodiment of a floor heating system according to the present invention will be described with reference to the drawings. In the present embodiment, as an example of the floor heating system X, an example using a heating unit U including a heating unit 4 that uses hot water as a heat medium and a cooling unit 5 that uses cold water as a refrigerant will be described. However, the present invention is not limited to the following embodiments, and various modifications can be made without departing from the scope of the invention.

  FIG. 1 shows a floor heating system X. The floor heating system X is connected to the heating unit U having the heating unit 4 and the cooling unit 5, the hot water pipe 7 connected to the heating unit 4, the hot water heater 8 connected to the hot water pipe 7, and the cooling unit 5. The chilled water piping 13 and the cooler 14 connected to the chilled water piping 13 are provided.

  As shown in FIG. 2, in the heating unit U, a floor material 1, a pressure sensor 2 (an example of a detection unit 30), a heat equalizing plate 3, and a panel body 6 are laminated in order from the upper side toward the vertical direction. In addition, when the heating unit U is a type attached to an existing floor surface (not shown), the existing floor surface exists below the panel body 6.

  The flooring 1 is a floor finishing material having a thickness of about 6 mm spread in the room, and is composed of flooring, tatami mats, carpets and the like.

  The pressure sensor 2 is disposed between the floor material 1 and the panel body 6, one surface is in contact with the back surface of the floor material 1, and the surface of the heat equalizing plate 3 provided on the upper surface of the panel body 6. The other surface is in contact. The pressure sensor 2 is composed of a metal strain gauge, a semiconductor strain gauge, or the like that measures a dynamic load on the surface of the flooring 1 (hereinafter referred to as “floor surface”) by a change in electric resistance. The pressure sensor 2 may be a capacitance type pressure sensor that measures a dynamic load on the floor surface by a change in capacitance, and is not particularly limited.

  The pressure sensor 2 in the present embodiment detects that a detection target (for example, a person, hereinafter referred to as “person”) as a moving object is in contact with the flooring 1. That is, the pressure sensor 2 detects that a person exists by detecting a dynamic load. For example, if a person is sitting on the floor, a dynamic load always acts on the pressure sensor 2, so that a change in electrical resistance is measured by the pressure sensor 2 and the presence of the person can be detected. On the other hand, in the case of an object that is placed on the floor and does not move, such as furniture, a static load is applied to the pressure sensor 2, but since no change in electrical resistance is measured by the pressure sensor 2, there is no person. Become.

  The soaking plate 3 is a metal soaking sheet for soaking composed of aluminum foil or the like. By the heat equalizing plate 3, the amount of heat from the panel body 6 is evenly transferred to the flooring 1.

  The panel body 6 is a mat composed of a resin foam or the like having a thickness of about 15 mm. Inside the panel body 6, a heating unit 4 composed of a hot water resin tube to which hot water is supplied and cold water are supplied. And a cooling unit 5 composed of a cold water resin tube. In the present embodiment, the cooling unit 5 is disposed below the heating unit 4 independently of the heating unit 4. Specifically, in the cross-sectional view of FIG. 1, a staggered arrangement in which the cold water resin tubes of the cooling unit 5 exist between the hot water resin tubes of the respective heating units 4 is employed. In addition, the cold water resin tube of the cooling unit 5 may be provided directly under the hot water resin tube of each heating unit 4, and is not particularly limited.

  As shown in FIGS. 1 to 2, the heating unit 4 increases the amount of heat of the panel body 6 by supplying hot water. As a specific configuration of the heating unit 4, hot water resin tubes capable of circulating hot water are arranged meandering inside the panel body 6, and a plurality of hot water resin tubes are arranged in parallel in a cross-sectional view. The heating unit 4 may be provided with a U-shaped aluminum member that surrounds and fixes the side of the hot water resin tube.

  The heating unit 4 is formed with a hot water inlet 4a through which hot water flows from the hot water heater 8 through the hot water pipe 7 and a hot water outlet 4b through which hot water that has passed heat to the panel body 6 flows out. One end of the hot water pipe 7 is connected to the hot water inlet 4a, and the other end of the hot water pipe 7 is connected to the hot water outlet 4b. Thereby, the warm water heated by the warm water heater 8 circulates in the heating unit 4, and the warm water deprived of heat by the panel body 6 returns to the warm water heater 8 and is heated again.

  The cooling unit 5 reduces the amount of heat of the panel body 6 by supplying cold water. As a specific configuration of the cooling unit 5, cold water resin tubes (an example of a hollow member) capable of circulating cold water inside the panel body 6 are arranged in a meandering manner, and a plurality of cold water resin tubes are arranged in parallel in a sectional view. Has been placed. In addition, if the cooling part 5 is a hollow member, it will not be limited to what is comprised with a pipe | tube, For example, you may arrange | position a hollow housing to the lower side of the panel main body 6. FIG. Further, the cooling unit 5 may be provided with a U-shaped aluminum member that surrounds and fixes the side and upper side of the cold water resin tube.

  The cooling unit 5 is formed with a cold water inlet 5 a through which cold water flows from the cooler 14 through the cold water pipe 13 and a cold water outlet 5 b through which cold water that has taken heat from the panel body 6 flows out. One end of the cold water pipe 13 is connected to the cold water inlet 5a, and the other end of the cold water pipe 13 is connected to the cold water outlet 5b. Thereby, the cold water cooled by the cooler 14 flows to the cooling unit 5, and the cold water heated by taking heat from the panel body 6 returns to the cooler 14 and is cooled again.

  The hot water heater 8 burns a fuel gas such as city gas to generate hot water (for example, 60 ° C. to 75 ° C.). The hot water heater 8 may be an integrated type having a burner for floor heating and a burner for hot water supply, or may be dedicated to floor heating provided only with a burner for floor heating. The cooler 14 generates cold water (for example, 5 ° C. to 20 ° C.) by exchanging heat between water and the refrigerant. The tap water may be circulated without using the cooler 14, or a heat pump device in which the hot water heater 8 and the cooler 14 are integrated may be used.

  As shown in FIGS. 1 and 3, the floor heating system X includes a measurement unit K, a detection unit 30, a determination unit 20, and a control unit 10. Each functional unit of the determination unit 20 and the control unit 10 in the present embodiment is constructed by hardware and / or software with a processor and memory that execute various processes as a core.

  The measurement unit K includes a hot water temperature measurement unit 9A, a hot water flow rate measurement unit 9B, a room temperature measurement unit 11, a cold water temperature measurement unit 15A, and a cold water flow rate measurement unit 15B. The measuring unit K only needs to include at least the hot water temperature measuring unit 9A.

  The hot water temperature measuring unit 9A is composed of a temperature sensor, and the first measured temperature (incoming temperature) of the hot water flowing through the hot water pipe 7 between the hot water heater 8 and the hot water inlet 4a of the heating unit 4 is heated. A second measured temperature (outlet temperature) of hot water flowing through the hot water pipe 7 between the hot water outlet 4b of the section 4 and the hot water heater 8 is measured. The hot water flow rate measuring unit 9 </ b> B includes a flow sensor that measures the flow rate of the hot water flowing through the hot water pipe 7 between the hot water heater 8 and the hot water inlet 4 a of the heating unit 4. The room temperature measurement unit 11 is configured by a temperature sensor that measures the temperature of the room space in which the heating unit U is provided. The cold water temperature measurement unit 15 </ b> A includes a temperature sensor that measures the temperature of the cold water flowing through the cold water pipe 13 between the cooler 14 and the cold water inlet 5 a of the cooling unit 5. The chilled water flow rate measurement unit 15 </ b> B includes a flow rate sensor that measures the flow rate of chilled water flowing through the chilled water pipe 13 between the cooler 14 and the chilled water inlet 5 a of the cooling unit 5. Note that the cold water temperature measurement unit 15 </ b> A is preferably provided also in the cold water pipe 13 between the cold water outlet 5 b of the cooling unit 5 and the cooler 14.

  The determination unit 20 includes a floor surface temperature estimation unit 21 and a low temperature burn determination unit 22.

  The floor surface temperature estimation unit 21 estimates the surface temperature of the flooring 1 based on the measurement result of the measurement unit K (hereinafter referred to as “floor surface temperature”). As an example, the floor surface temperature estimation unit 21 estimates the floor surface temperature from the incoming and outgoing temperatures of the hot water measured by the hot water temperature measurement unit 9A. In this case, the flow rate of the warm water is constant, the first measured temperature of the warm water temperature measurement unit 9A provided in the warm water pipe 7 between the warm water heater 8 and the warm water inlet 4a of the heating unit 4, and the warm water of the heating unit 4 The surface temperature of the flooring 1 is estimated by calculating the amount of output heat to the panel body 6 from the second measured temperature of the hot water temperature measuring section 9A provided in the hot water pipe 7 between the outlet 4b and the hot water heater 8. To do. At this time, a map of the difference between the temperature and the temperature of the hot water according to the time (for example, every month) and the floor surface temperature is created in advance, and the floor surface temperature is estimated from the map using the difference as an input value. It is preferable to do. As a result, an estimation result that takes into account the amount of heat taken from the floor to the indoor air is obtained.

  As another example, the floor surface temperature estimation unit 21 sets the flow rate of the hot water to be constant, the first measurement temperature and the second measurement temperature of the hot water measured by the hot water temperature measurement unit 9A, and the room temperature measured by the room temperature measurement unit 11. To estimate the floor temperature. The amount of heat of the hot water supplied to the heating unit 4 is transferred to the floor surface through the panel body 6 to warm the floor surface, and the room temperature is raised by radiant heat from the floor surface. That is, the floor surface temperature estimation unit 21 calculates the floor surface temperature from the amount of heat transferred to the floor calculated from the first measured temperature and the second measured temperature of hot water by the value obtained by subtracting the amount of heat lost to the indoor air. Is estimated. In this case, since the floor surface temperature is estimated in consideration of the actual room temperature in addition to the temperature of the hot water, the estimation accuracy can be increased.

  As another example, the floor surface temperature estimation unit 21 includes a first measurement temperature and a second measurement temperature of hot water measured by the hot water temperature measurement unit 9A, a room temperature measured by the room temperature measurement unit 11, and a hot water flow rate measurement unit. The floor surface temperature is estimated using the flow rate of hot water measured in 9B. Even when the temperature of the warm water is the same, the amount of heat output from the heating unit 4 varies depending on the flow rate of the warm water. That is, the floor surface temperature estimation unit 21 calculates the floor surface by a value obtained by subtracting the amount of heat taken by the indoor air from the heat transfer amount to the floor surface calculated by taking into account the flow rate of the hot water in addition to the temperature of the hot water. Estimate temperature. Thereby, even when the operation is performed such that the flow rate of the hot water is different, the estimation accuracy can be increased.

  The detection unit 30 includes the pressure sensor 2 and the time measuring unit 31 described above. The timer 31 counts the elapsed time from when a person is detected by the pressure sensor 2.

  The low temperature burn determination unit 22 determines whether or not a predetermined low temperature burn determination threshold for a person is exceeded based on the floor surface temperature estimated by the floor surface temperature estimation unit 21 and the detection result of the detection unit 30. .

  Here, the predetermined low-temperature burn determination threshold will be described with reference to FIG. In FIG. 5, the logarithmic scale elapsed time is provided on the horizontal axis, and the skin surface temperature (equivalent to the floor temperature) is provided on the vertical axis.

  As shown in FIG. 5, when the floor temperature is 45 ° C. for about 5 hours or more, or when the floor temperature is 50 ° C. for about 5 minutes or more, the area that suffers low-temperature burns (skin damage) Receiving area). On the other hand, when the state at 45 ° C. is 3 hours or the state at 50 ° C. is 3 minutes, it is a safe area free from low temperature burns. In addition, there is an area where the low temperature burn can be reduced (a damaged area that can return to the original state) between the area where the low temperature burn is caused and the safe area.

  In this embodiment, the predetermined low-temperature burn determination threshold is set at the boundary between a region where low-temperature burn can be reduced and a safe region. Note that the predetermined low-temperature burn detection threshold may be set at the boundary between the low-temperature burn-affected area and the low-temperature burn-reducing area, or it is safer than the boundary between the low-temperature burn-reducing area and the safe area. The region side may be set by multiplying a predetermined safety factor.

  That is, the low-temperature burn determination unit 22 performs a predetermined low-temperature based on the floor surface temperature estimated by the floor surface temperature estimation unit 21 and the elapsed time counted by the time measuring unit 31 for the person detected by the pressure sensor 2. It is determined whether or not a burn determination threshold is exceeded. For example, the low-temperature burn determination unit 22 determines that the low-temperature burn determination threshold is exceeded when a floor surface temperature of 48 ° C. has passed for about 10 minutes or more.

  The control unit 10 includes a heating control unit 10A and a cooling control unit 10B.

  The heating control unit 10 </ b> A controls the circulation of hot water supplied to the heating unit 4. That is, the heating control unit 10A sets the heating temperature of the hot water heater 8 and the flow rate of the hot water discharged from the hot water heater 8 so that the room temperature becomes a target temperature set in advance by the user. Based on the first measured temperature and the second measured temperature, the flow rate, and the room temperature of the hot water measured by the part K, the circulation of the hot water supplied to the heating unit 4 is controlled. Note that, as described above, the heating control unit 10A sets the flow rate of the hot water to be constant, the first measured temperature and the second measured temperature of the hot water measured by the measuring unit K, or the first measured temperature and the second measured temperature. You may control the distribution | circulation of the warm water supplied to the heating part 4 based on room temperature. As a mode for controlling the circulation of the hot water, the heating temperature of the heating controller 10A with respect to the hot water may be constant, and an on-off valve may be provided between the hot water heater 8 and the hot water inlet 4a of the heating unit 4 to control the flow rate. In addition, the heating temperature of the heating control unit 10A with respect to the hot water may be controlled in a state where the flow rate is constant, or both.

  The cooling control unit 10 </ b> B controls the circulation of the cold water supplied to the cooling unit 5. The cooling control unit 10B operates the cooling unit 5 when the low temperature burn determination unit 22 determines that the low temperature burn determination threshold is exceeded. That is, the cooling control unit 10B sets the cooling temperature of the cooler 14 and the flow rate of the chilled water discharged from the cooler 14 so that the floor surface temperature is in the safe region shown in FIG. The flow of the cold water supplied to the cooling unit 5 is controlled based on the temperature and flow rate of the cold water measured in step 1 and the room temperature. When the low temperature burn determination unit 22 determines that the low temperature burn determination threshold is exceeded, the heating control unit 10A preferably stops the supply of hot water to the heating unit 4.

  Next, an example of a control method for the floor heating system X will be described with reference to FIG.

  First, the user operates an operation panel (not shown) to turn on the floor heating system X, set a target temperature, and start normal operation (# 41). Next, if the pressure sensor 2 of the measuring unit K does not detect the dynamic load (No in # 42), the process waits until the dynamic load is detected. On the other hand, if the pressure sensor 2 of the measuring unit K detects a dynamic load (# 42 Yes), it is detected that a person as a moving body is in contact with the flooring 1. Then, the floor surface temperature estimating unit 21 estimates the floor surface temperature using the hot water incoming and outgoing temperatures measured by the hot water temperature measuring unit 9A and the room temperature measured by the room temperature measuring unit 11 (# 43). . The timer 31 counts the elapsed time since it was detected that the person as a moving object is in contact with the flooring 1 (# 43).

  Next, the low temperature burn determination unit 22 determines a predetermined low temperature based on the floor surface temperature estimated by the floor surface temperature estimation unit 21 and the elapsed time counted by the time measuring unit 31 for the person detected by the pressure sensor 2. It is determined whether or not the burn determination threshold is exceeded (# 44). Specifically, the low temperature burn determination unit 22 determines whether or not the low temperature burn determination threshold is exceeded based on the elapsed time and the floor surface temperature at which the detected value of the pressure sensor 2 that has detected the dynamic load continues. .

  If the result of the determination in # 44 is that the low temperature burn determination threshold is not exceeded (No in # 44), the pressure sensor 2 of the measuring unit K measures whether or not the person in contact with the flooring 1 has moved (# 45). If the person in contact with the flooring 1 is not moving (No in # 45), the floor surface temperature estimation unit 21 estimates the floor surface temperature and the time measuring unit 31 counts the elapsed time (# 43). . On the other hand, when the person in contact with the flooring 1 has moved to another location (# 45 Yes), the process returns to # 42 and a series of operations (# 42 to # 44) are repeated.

  If the result of the determination in # 44 is that the low temperature burn determination threshold is exceeded (# 44 Yes), the heating control unit 10A stops the supply of hot water to the heating unit 4 (# 46). Then, cooling control unit 10B operates cooling unit 5 (# 47). That is, the cooling control unit 10B estimates the floor surface temperature based on the temperature and flow rate of the cold water measured by the measurement unit K and the room temperature, and the cooling temperature of the cooler 14 so as to be below the low temperature burn determination threshold. The flow rate of the cold water discharged from the cooler 14 is set. At this time, the third measured temperature of the chilled water temperature measuring unit 15A provided in the chilled water pipe 13 between the chiller 14 and the chilled water inlet 5a of the chilled unit 5, the chilled water outlet 5b of the chilled unit 5 and the cooler 14 The surface temperature of the flooring 1 may be estimated by calculating the amount of heat absorbed from the panel body 6 from the fourth measured temperature of the chilled water temperature measuring unit 15A provided in the chilled water pipe 13 between the two.

  When the supply of hot water to the heating unit 4 is not stopped, the cooling control unit 10B sets the incoming temperature and outgoing temperature of hot water, the flow rate of hot water, the temperature and flow rate of cold water, and the room temperature measured by the measurement unit K. Based on this, the floor surface temperature is estimated, and the cooling temperature of the cooler 14 and the flow rate of the cold water discharged from the cooler 14 are set so as to be lower than the low temperature burn determination threshold. As a form for controlling the flow of the cold water, the flow rate may be controlled by providing an opening / closing valve between the cooling control unit 10B and the cold water inlet 5a of the cooling unit 5 while keeping the cold water temperature of the cooling control unit 10B constant. Then, the cold water temperature of the cooling control unit 10B may be controlled in a state where the flow rate is constant.

  In the above-described embodiment, the heating unit 4 to which hot water is supplied and the cooling unit 5 to which cold water is supplied are provided separately in the panel body 6. Since the cooling unit 5 reduces the amount of heat of the panel body 6 when cold water is supplied, the amount of heat transmitted from the heating unit 4 to the flooring 1 via the panel body 6 can be reduced. Moreover, since the cooling unit 5 of the present embodiment is provided inside the panel body 6, the amount of heat of the panel body 6 can be directly reduced, and the cooling efficiency is high. Moreover, since the control part 10 of this embodiment operates the cooling part 5 when it determines with the determination part 20 having exceeded the low-temperature burn determination threshold value, it contacts the flooring 1 for a long time by simple control. It can be lowered to a temperature range where people who are cold are not burned.

  The determination unit 20 according to the present embodiment includes the incoming temperature and the outgoing temperature (room temperature and hot water flow rate as necessary) measured by the measurement unit K, and the contact status of the human flooring 1 detected by the detection unit 30. Based on the above, it is determined whether or not a predetermined low-temperature burn determination threshold is exceeded. That is, since the determination result reflects the floor surface temperature estimated from the incoming temperature and the outgoing temperature of the hot water and the contact time of the person with the flooring 1 accurately, the determination accuracy can be improved. As described above, the floor heating system X according to the present embodiment prevents low-temperature burns by reducing the temperature of the person who has been in contact with the flooring 1 for a long time to a temperature range that does not cause low-temperature burns based on the accurate determination result. Or it can be relaxed.

  If the cooling unit 5 is formed of a hollow member (cold water resin pipe) through which cold water can flow as in the present embodiment, the cooling unit 5 can be easily provided. The cooling unit 5 is composed of a hollow member provided below the heating unit 4. For this reason, when the floor surface is heated, the heat quantity of the heating unit 4 is less likely to move downward due to the heat insulating effect of the hollow member through which cold water does not circulate, and the amount of heat that moves upward increases. Can be heated. Further, when the floor surface is cooled, the amount of heat of the heating unit 4 moves downward due to the cold water flowing through the hollow member, and the floor surface can be quickly cooled.

  If the supply of hot water to the heating unit 4 is stopped when the low-temperature burn determination threshold is exceeded as in this embodiment, the floor surface can be quickly cooled. Therefore, it is possible to prevent or mitigate low temperature burns quickly.

  If a person is detected by the pressure sensor 2 provided between the flooring 1 and the panel body 6 as in the present embodiment, the pressure sensor classifies whether it is a static load or a dynamic load. Presence / absence can be reliably detected. Thereby, there is no inconvenience that it cannot be detected when a person is hidden by a shielding object such as a human detection sensor.

[Another embodiment]
In the above-described embodiment, as shown in FIG. 1, the cooling unit 5 formed of a hollow member is disposed below the heating unit 4 independently of the heating unit 4. Instead of this, as shown in FIG. 6, the cooling unit 5 formed of a hollow member may be disposed on the side of the heating unit 4 independently of the heating unit 4. Even in this case, when the floor surface is heated, the amount of heat of the heating unit 4 becomes difficult to move to the side due to the heat insulation effect of the hollow member through which cold water does not circulate, and the amount of heat that moves upward increases. Can warm up quickly. Further, when the floor surface is cooled, the amount of heat of the heating unit 4 moves to the side by flowing cold water through the hollow member, and the floor surface can be quickly cooled. In addition, in the present embodiment, since the heating unit 4 and the cooling unit 5 can be arranged from the upper surface of the panel body 6, the panel body 6 can be easily manufactured.

[Other Embodiments]
(1) The cooling unit 5 formed of a hollow member may be disposed on the lower side and the side of the heating unit 4 independently of the heating unit 4. That is, you may add together arrangement | positioning of the cooling part 5 shown by FIG.1 and FIG.6 mentioned above. In this case, the heat insulation effect and cooling effect of the hollow member can be further exhibited.
(2) The measurement unit K may be configured with a temperature sensor that directly measures the floor temperature. In this case, it is preferable to provide a plurality of temperature sensors at equal intervals on the flooring 1.
(3) The detection unit 30 is not limited to the pressure sensor 2 as long as it can detect that a person as a moving object is in contact with the flooring 1, and may be a human detection sensor or an infrared sensor.
(4) In the above-described embodiment, hot water is used as the heat medium and cold water is used as the refrigerant. However, the heat medium and the refrigerant may be a liquid such as oil or a gas such as air.

  Note that the configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in other embodiments as long as no contradiction arises. In addition, the embodiments disclosed in this specification are exemplifications, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used for a floor heating system that heats a room by heating the floor surface.

1: Floor material 2: Pressure sensor (detection unit)
4: Heating unit 5: Cooling unit 6: Panel body 9A: Hot water temperature measuring unit (measuring unit)
9B: Hot water flow rate measurement unit (measurement unit)
10: Control unit 10A: Heating control unit (control unit)
10B: Cooling control unit (control unit)
11: Room temperature measurement unit (measurement unit)
15A: Cold water temperature measurement unit (measurement unit)
15B: Cold water flow rate measurement unit (measurement unit)
20: Determination unit 21: Floor temperature estimation unit (determination unit)
22: Low temperature burn determination unit (determination unit)
30: Detection unit 31: Timing unit (detection unit)
K: Measurement unit X: Floor heating system

Claims (6)

Flooring spread throughout the room,
A panel body that is provided on the lower side of the flooring and heats the flooring;
A heating unit that is provided inside the panel body and increases the amount of heat of the panel body by supplying a heat medium;
A cooling unit which is provided inside the panel body and reduces the amount of heat of the panel body by supplying a refrigerant;
A measuring unit for measuring an inlet temperature and an outlet temperature of the heating medium with respect to the heating unit, or a surface temperature of the flooring;
A detection unit for detecting that a detection target as a moving object is in contact with the flooring;
Based on the measurement result of the measurement unit and the detection result of the detection unit, a determination unit that determines whether or not a predetermined low-temperature burn determination threshold for the detection target is exceeded,
A control unit that controls the flow of the heating medium and the refrigerant supplied to the heating unit and the cooling unit,
The control unit is a floor heating system that operates the cooling unit when the determination unit determines that the low-temperature burn determination threshold is exceeded.   The floor heating system according to claim 1, wherein the cooling unit is provided on at least one of the lower side and the side of the heating unit, and has a hollow member through which the refrigerant can flow.   The floor heating system according to claim 1 or 2, wherein when the determination unit determines that the low-temperature burn determination threshold is exceeded, the control unit stops supplying the heating medium to the heating unit. The measuring unit measures the incoming temperature, outgoing temperature, and room temperature,
The determination unit estimates a surface temperature of the flooring based on the input and output temperatures and the room temperature measured by the measurement unit, and the low temperature burn determination threshold based on the estimated surface temperature The floor heating system according to any one of claims 1 to 3 which determines whether it exceeds. The measuring unit measures the input and output temperatures, the room temperature, and the flow rate of the heating medium,
The determination unit estimates a surface temperature of the flooring based on the input and output temperatures, the flow rate, and the room temperature measured by the measurement unit, and the low temperature based on the estimated surface temperature. The floor heating system according to any one of claims 1 to 3, wherein it is determined whether or not a burn determination threshold is exceeded.   The floor heating system according to any one of claims 1 to 5, wherein the detection unit includes a pressure sensor provided between the floor material and the panel body.

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