JP5812755B2 - Hot water floor heater - Google Patents

Description

  The present invention relates to a hot water floor heating apparatus that performs heating by circulating hot water on an indoor floor.

  2. Description of the Related Art There is known a hot water floor heater that heats a room by installing a floor heating panel on the floor of the room and supplying hot water generated by a heat source machine to the floor heating panel. This hot water floor heating device is provided with a thermal valve that controls the amount of hot water supplied to the floor heating panel between the heat source unit and the floor heating panel, and based on the temperature difference between the room temperature and the set temperature. The indoor temperature is kept in the vicinity of the set temperature by switching the thermal valve to an open state or a closed state.

  Here, in order to quickly warm the room when the hot water floor heating apparatus is activated, it is desirable to quickly raise the floor temperature. For that purpose, it is desirable to supply hot water having a high temperature to the floor heating panel. On the other hand, if the temperature of the hot water to be supplied increases, the floor temperature fluctuates when the open / close state of the thermal valve is switched, making it easier for the user to know that the floor surface is hot or cold. There is a risk of impairing comfort. Therefore, in order to maintain comfort after the room is warmed, it is desirable that the temperature of the hot water supplied to the floor heating panel is not so high.

  Therefore, when the hot water floor heater is activated, the floor temperature is quickly raised by performing an operation (hereinafter referred to as “high temperature continuous operation”) in which hot hot water is continuously supplied to the floor heating panel. When the temperature approaches the set temperature (or when the operation time in high-temperature continuous operation reaches a certain time), operation to supply low-temperature hot water to the floor heating panel while opening and closing the thermal valve (referred to as “low-temperature switching operation” in this specification) (Referred to as Patent Document 1).

Japanese Patent Laid-Open No. 9-269133

  However, in the technique of Patent Document 1 described above, when the high-temperature continuous operation is switched to the low-temperature open / close operation, the user feels that the floor temperature has suddenly decreased and the comfort may be impaired. was there.

  This invention is made | formed corresponding to the subject mentioned above which a prior art has, and aims at provision of the warm water floor heating apparatus which does not impair a user's comfort.

In order to solve the above-described problems, the hot water floor heating apparatus of the present invention employs the following configuration. That is,
A floor heating panel installed indoors;
A heat source machine that generates hot water;
A thermal valve provided on a hot water passage connecting the heat source unit and the floor heating panel, and opening and closing the hot water passage;
A control unit for controlling operations of the heat source unit and the thermal valve ;
Temperature detecting means for detecting the room temperature;
In a hot water floor heating apparatus that includes a temperature setting means for setting a target temperature for the control unit and performs floor heating operation ,
The controller is
First operating means for realizing a first operating state in which the thermal valve is opened and hot water having a predetermined first temperature is supplied to the floor heating panel;
During operation in the first operating state, when the room temperature reaches a predetermined first threshold temperature lower than the target temperature, it is determined that a predetermined first switching condition is satisfied , and the thermal valve is opened. Second operating means for realizing a second operating state in which hot water at the first temperature is supplied to the floor heating panel while repeating a state and a closed state;
During operation in the second operating state, determining that the when the room temperature reaches the first threshold temperature second threshold temperature lower predetermined than high and the target temperature than the predetermined second changeover condition is satisfied A third operation that realizes a third operation state in which hot water having a predetermined second temperature lower than the first temperature is supplied to the floor heating panel while the thermal valve repeats an open state and a closed state. together and means,
When the indoor temperature is lower than the first threshold temperature at the start of the floor heating operation, the floor heating operation is started by activating the first operation means,
If the room temperature is higher than the first threshold temperature but lower than the second threshold temperature at the start of the floor heating operation, the floor heating operation is started by activating the second operating means,
If the room temperature is higher than the second threshold temperature at the start of the floor heating operation, the third operation means is activated to start the floor heating operation.
It is characterized by that.

In the hot water floor heating apparatus of the present invention, the floor heating operation is performed by supplying the hot water generated by the heat source machine to the floor heating panel through the thermal valve. Here, the control unit controls the operation of the heat source unit according to the set target temperature and the detected room temperature, thereby changing the temperature of the hot water supplied to the floor heating panel to the first temperature and the first temperature. The temperature can be switched to a second temperature lower than the temperature, and the thermal valve can be switched to an open state or a closed state. The heat valve can be provided on a hot water passage for supplying hot water from the heat source unit to the floor heating panel. However, when the hot water supplied to the floor heating panel is returned to the heat source unit, the hot water is returned to the heat source unit. It is also possible to provide a thermal valve on the hot water passage. When the indoor temperature is lower than the first threshold temperature at the start of the floor heating operation , the control unit opens the thermal valve and opens the floor in an operation state (first operation state) in which hot water at the first temperature is supplied. Start heating operation . As after, the room temperature, it is judged that the first switching condition reaches a predetermined first threshold temperature lower than the target temperature is established, the first temperature while repeating the open and closed states by thermally activated valve Ru switched state operation of supplying hot water (second operating state). In addition , during the floor heating operation in the second operation state, when the room temperature reaches a predetermined second threshold temperature, it is determined that the second switching condition is satisfied, and the thermal valve operates between the open state and the closed state. Is switched to an operation state (third operation state) in which hot water at the second temperature is supplied. Here, the second threshold temperature is set to a temperature higher than the first threshold temperature and lower than the target temperature. In addition, when the room temperature at the start of the floor heating operation is lower than the first threshold temperature, the floor heating operation is started in the first operation state, but the room temperature at the start of the floor heating operation is the second threshold value. When the temperature is lower than the temperature but higher than the first threshold temperature, the floor heating operation is started in the second operation state (not the first operation state). Further, when the room temperature at the start of the floor heating operation is higher than the second threshold temperature, the floor heating operation is started in the third operation state (not in either the first operation state or the second operation state).

In the first operation state, the first temperature hot water is continuously supplied to the floor heating panel, in the second operation state, the first temperature hot water is intermittently supplied to the floor heating panel, and in the third operation state, the first temperature is supplied. The hot water having a lower second temperature is intermittently supplied to the floor heating panel. Therefore, the amount of heat per hour (supplied heat amount) supplied to the floor heating panel is the largest in the first operation state, and decreases in the order of the second operation state and the third operation state. And in the hot water floor heating apparatus of this invention, when switching from the 1st driving | running state with large supply heat amount to the 3rd driving | running state with small supply heat amount, it passes through the 2nd driving | running state of intermediate supply heat amount. It has become. For this reason, after the floor heating is started in the first operation state, the amount of heat per hour supplied to the floor heating panel is not suddenly reduced until switching to the third operation state. As a result, it is possible to avoid a situation in which the user feels that the floor temperature has suddenly decreased and the comfort is impaired. In addition, when the room temperature at the start of the floor heating operation is lower than the first threshold temperature, the floor heating operation is started in the first operation state where the amount of heat supplied to the floor heating panel is the largest, When the room temperature is higher than the first threshold temperature but lower than the second threshold temperature, the floor heating operation is started in the second operation state in which the amount of supplied heat is smaller than that in the first operation state. Furthermore, when the indoor temperature at the start is higher than the second threshold temperature, the floor heating operation is started in the third operation state in which the supplied heat amount is the smallest. Thus, the floor heating operation can be started in an appropriate operation state according to the room temperature and the target temperature at the start.

In addition , floor heating can be performed in an operating state with a larger amount of supplied heat as the indoor temperature becomes lower than the target temperature, so that the indoor temperature can be quickly brought close to the target temperature. Furthermore, after the end of the first operation state in which the supplied heat amount is the largest , the amount of heat per hour supplied to the floor heating panel is larger than in the third operation state rather than suddenly switching to the third operation state in which the supplied heat amount is the smallest . Since it can switch to a 2nd driving | running state, it becomes possible to warm a room more rapidly.

  Moreover, in the hot water floor heating apparatus of this invention mentioned above, you may be made as follows. First, in a 2nd driving | running state, a thermal valve shall repeat an open state and a closed state with a predetermined fixed period. The ratio of the period of the open state in the fixed period is the amount of heat per hour received by the floor heating panel when the hot water of the second temperature is supplied with the thermal valve open. It may be set to a larger ratio than the value divided by the amount of heat per hour received by the floor heating panel when the first temperature hot water is supplied in the open state.

  The amount of heat per hour (supplied heat amount) supplied to the floor heating panel in the second operating state varies depending on the ratio of the open period within a certain period, but the ratio of the open period is If the ratio is set, the amount of heat supplied in the second operation state is necessarily larger than the amount of heat supplied in the third operation state. Therefore, when switching from the first operation state to the third operation state, the sudden decrease in the amount of heat supplied to the floor heating panel can be reliably avoided by passing through the second operation state. It is possible to reliably avoid situations where the comfort of the vehicle is impaired.

It is explanatory drawing which shows the structure of the hot water floor heating apparatus of a present Example. It is a flowchart which shows the first half part of the floor heating operation process of a present Example. It is a flowchart which shows the second half part of the floor heating operation process of a present Example. It is explanatory drawing which illustrated the measurement result of the room temperature and floor temperature at the time of making it pass through high temperature switching operation. It is explanatory drawing which illustrated the measurement result of the room temperature and floor temperature when not making it go through via high temperature switching operation.

A. Device configuration :
Drawing 1 is an explanatory view showing the composition of warm water floor heating device 1 of this example. As shown in the figure, a hot water floor heating apparatus 1 includes a floor heating panel 200 installed on an indoor floor, a hot water supply unit 100 that supplies hot water to the floor heating panel 200, a remote controller installed on an indoor wall surface, and the like. (Hereinafter referred to as the remote controller 300) and the like. Among these, the hot water supply unit 100 includes a heat source unit 110 that generates hot water, a circulation pump 126 that circulates the generated hot water, a forward side hot water passage 120 a through which the hot water flows out from the heat source unit 110, A return-side hot water passage 120b that recirculates, a floor heating hot water passage 120c that supplies hot water to the floor heating panel 200, and the like. In the following description, the outgoing hot water passage 120a, the return hot water passage 120b, and the floor heating hot water passage 120c may be collectively referred to as the hot water passage 120.

  The outgoing hot water passage 120 a is connected from the heat source device 110 to the cistern 124 via the bypass valve 128, and the return hot water passage 120 b is connected from the cistern 124 to the heat source device 110 via the circulation pump 126. For this reason, when the circulation pump 126 is operated, the hot water in the cis turn 124 circulates through the route of the circulation pump 126, the return side hot water passage 120b, the heat source device 110, the outgoing side hot water passage 120a, the bypass valve 128, and the cis turn 124. Further, the floor heating hot water passage 120c branches from the return side hot water passage 120b on the downstream side of the circulation pump 126, and is connected to the floor heating panel 200 via the thermal valve 130 and the outgoing side hot water outlet 202a. The return side hot water outlet 202b is joined to the forward side hot water passage 120a on the downstream side of the bypass valve 128. Therefore, when the thermal valve 130 is opened while the circulation pump 126 is in operation, a part of the hot water returning from the cistern 124 to the heat source unit 110 flows into the floor heating panel 200 through the floor heating hot water passage 120c. , Refluxed to the cistern 124. Further, the outgoing side hot water passage 120a is provided with an outgoing side temperature sensor 122a for detecting the temperature of the hot water flowing out from the heat source device 110, and the return side hot water passage 120b is provided with a temperature of the hot water flowing into the heat source device 110. A return-side temperature sensor 122b for detecting the above is provided. In the following description, the forward temperature sensor 122a and the return temperature sensor 122b may be collectively referred to as the temperature sensor 122.

  The heat source unit 110 includes a gas burner 114, an electromagnetic valve 118 that controls the amount of fuel gas supplied to the gas burner 114, a combustion fan 116 that supplies combustion air to the gas burner 114, and a heat exchanger 112. It is configured. The hot water can be generated by heating the heat exchanger 112 with the gas burner 114 while operating the circulation pump 126 to pass the hot water through the heat exchanger 112.

  The hot water supply unit 100 is equipped with a controller 140. The controller 140 is connected to a temperature sensor 122, a circulation pump 126, a bypass valve 128, a thermal valve 130, a combustion fan 116, an electromagnetic valve 118, and the like. For this reason, the controller 140 can control the operation of the hot water supply unit 100 to control the temperature of the hot water supplied to the floor heating panel 200. For example, when the hot water temperature detected by the return side temperature sensor 122b is lower than the target temperature of the hot water supplied to the floor heating panel 200, the rotational speed of the combustion fan 116 and the opening degree of the electromagnetic valve 118 are adjusted to adjust the gas burner. Increase the ability of 114. Then, the temperature of the hot water flowing out from the outgoing hot water passage 120a rises, so the temperature of the hot water in the systern 124 rises and the temperature of the hot water supplied to the floor heating panel 200 rises. Alternatively, when the opening degree of the bypass valve 128 is increased, the hot water flowing from the heat source device 110 into the cistern 124 increases, so that the hot water temperature in the cistern 124 rises. Therefore, the temperature of the hot water supplied to the floor heating panel 200 can also be increased by increasing the opening degree of the bypass valve 128. Even when the temperature of hot water supplied to the floor heating panel 200 is higher than the target temperature, the temperature of the hot water can be lowered by controlling the combustion fan 116, the electromagnetic valve 118, the bypass valve 128, and the like. In this embodiment, the temperature of hot water supplied to the floor heating panel 200 can be switched to 80 ° C. or 60 ° C. In this embodiment, the hot water temperature of 80 ° C. corresponds to the “first temperature” of the present invention, and the hot water temperature of 60 ° C. corresponds to the “second temperature” of the present invention. Further, the controller 140 corresponds to the “control unit” of the present invention.

  The remote controller 300 is provided with a liquid crystal display screen 302, operation buttons 304, a room temperature sensor 306 for detecting room temperature, and the like. The user of the hot water floor heating apparatus 1 can set the indoor target temperature by operating the operation button 304 while viewing the liquid crystal display screen 302. The remote controller 300 communicates with the controller 140 and transmits the room temperature detected by the room temperature sensor 306 and the target temperature set by the user to the controller 140. In this embodiment, the room temperature sensor 306 corresponds to “temperature detection means” of the present invention, and the remote controller 300 corresponds to “temperature setting means” of the present invention.

  The hot water floor heating apparatus 1 having the above-described configuration performs a high-temperature continuous operation (so-called hot dash operation) in which the thermal valve 130 is opened at the time of activation and hot water at 80 ° C. is continuously supplied to the floor heating panel 200. To quickly warm up the room. In addition, after the room is warmed, the temperature of the hot water supplied to the floor heating panel 200 is set to 60 ° C., and the low temperature opening and closing operation for opening and closing the thermal valve 130 is performed to maintain the room temperature at the target temperature. However, when switching from high-temperature continuous operation to low-temperature opening and closing operation, the floor temperature may feel abruptly lowered, and comfort may be impaired. Therefore, in the hot water floor heating apparatus 1 of the present embodiment, the following floor heating operation processing is performed.

B. Floor heating operation processing:
2 and 3 are flowcharts of the floor heating operation process executed by the controller 140 of this embodiment. When the floor heating operation process is started, it is determined whether or not a floor heating operation switch (not shown) is set to “ON” (STEP 10). The floor heating operation switch is provided in the remote controller 300 as one of the operation buttons 304 (see FIG. 1), and when the floor heating operation switch is set to “ON”, that fact is transmitted from the remote controller 300 to the controller 140. The When the controller 140 determines that the floor heating operation switch is not “ON” (STEP 10: no), the controller 140 enters a standby state while repeating the same determination. On the other hand, if it is determined that the floor heating operation switch has been turned “ON” (STEP 10: yes), it is determined whether or not the floor heating operation has been performed within a certain past time (for example, 1 hour) (STEP 12). This determination can be made, for example, by setting a timer that counts for a predetermined time at the end of the floor heating operation, and whether or not the counting is continued.

  As a result, when it is determined that the floor heating operation has not been performed within the past certain time (STEP 12: no), it is considered that the room is cold, so after the start of the operation time of the high temperature continuous operation (STEP 18) Then, a high-temperature continuous operation (that is, an operation state in which the heat operated valve 130 is opened and 80 ° C. hot water is supplied to the floor heating panel 200) is started (STEP 20). The state where the high temperature continuous operation is performed corresponds to the “first operation state” of the present invention.

  Subsequently, it is determined whether or not the operation time of the high-temperature continuous operation has reached a predetermined time (STEP 22). If the predetermined time has not been reached (STEP 22: no), the room temperature is set in the remote controller 300. It is determined whether or not the target temperature of -2 ° C has been reached (STEP 24). As a result, when the room temperature does not reach the target temperature of −2 ° C. (STEP 24: no), the process returns to STEP 20 and the high-temperature continuous operation is continued. While repeating the determination of STEP22 and STEP24 while performing high-temperature continuous operation in this way, the operation time eventually reaches a predetermined time (STEP22: yes), or when the room temperature reaches the target temperature -2 ° C (STEP24: yes) ) After starting the operation time of the high temperature switching operation (STEP 26 in FIG. 3), the high temperature switching operation is started (STEP 28).

  Here, the high temperature switching operation is the following operation state. First, the heat source device 110 (the combustion fan 116, the electromagnetic valve 118, etc.), the bypass valve 128, etc. are controlled so that warm water of 80 ° C. is supplied to the floor heating panel 200. Further, the thermal valve 130 repeats an open state and a closed state within a certain period. The ratio that the open state occupies within a certain period can be a fixed ratio, but the ratio that the open state occupies may decrease with time. Since warm water is supplied to the floor heating panel 200 only when the thermal valve 130 is in the open state, the amount of heat per hour (( (Supply heat amount) is reduced. However, if the ratio of the open state is too small, the amount of heat supplied will be less than that in the case of continuously supplying 60 ° C. hot water. Therefore, the ratio of the open state in a certain period is “the amount of heat per hour received by the floor heating panel 200 when hot water at 60 ° C. is supplied with the thermal valve 130 in the open state”. It is necessary to set a larger ratio than the value divided by “amount of heat per hour received by the floor heating panel 200 when hot water of 80 ° C. is supplied with 130 being in an open state”. In the present embodiment, the ratio of the open state within a certain period is set to such a fixed ratio. In this embodiment, the high temperature switching operation corresponds to the “second operation state” of the present invention. Further, the condition for switching from the high temperature continuous operation to the high temperature switching operation (STEP 22 or STEP 24 condition) corresponds to the “first switching condition” of the present invention, and in particular, the “predetermined time” used in the judgment of STEP 22 is the present invention. The “target temperature—2 ° C.” used in the determination of STEP 24 corresponds to the “first threshold temperature” of the present invention. Furthermore, the controller 140 that measures the operation time of the high-temperature continuous operation corresponds to the “timer” of the present invention.

  When the high temperature switching operation is thus started, it is subsequently determined whether or not the operation time of the high temperature switching operation has reached a predetermined time (STEP 30). If the predetermined time has not been reached (STEP 30: no), the room temperature is It is determined whether or not the target temperature-1 ° C. has been reached (STEP 32). Then, the process returns to STEP 28 and the high-temperature switching operation is performed until either the operation time reaches a predetermined time (STEP 30: yes) or the room temperature reaches the target temperature −1 ° C. (STEP 32: yes). continue. It should be noted that the predetermined time determined in STEP 22 and the predetermined time determined in STEP 30 can be different.

  As a result, if it is determined as “yes” in either STEP 30 or STEP 32, after setting the ratio for opening the thermal valve 130 based on the room temperature and the target temperature (STEP 34), the low temperature switching operation (ie, Then, the operation state of supplying hot water of 60 ° C. to the floor heating panel 200 is started while opening and closing the thermal valve 130 at a constant cycle (STEP 36). Note that the fixed cycle for opening and closing the thermal valve 130 in the low temperature opening / closing operation may be the same as the fixed cycle for opening and closing the thermal valve 130 in the high temperature switching operation. However, the high temperature switching operation performed immediately after the high temperature continuous operation (so-called hot dash operation) changes the room temperature faster than the low temperature switching operation, so the high temperature switching operation has a shorter period than the low temperature switching operation. It is also good. The state in which the low temperature opening / closing operation is performed corresponds to the “third operation state” of the present invention. Further, the condition for switching from the high temperature switching operation to the low temperature switching operation (STEP 30 or STEP 32 condition) corresponds to the “second switching condition” of the present invention, and particularly “target temperature—1 ° C.” used in the determination of STEP 32. Corresponds to the “second threshold temperature” or “threshold temperature” of the present invention. Further, the controller 140 that controls the heat source device 110, the thermal valve 130, etc. to realize the high temperature continuous operation, the high temperature switching operation, and the low temperature switching operation corresponds to the “first to third operation means” of the present invention.

  In the above, the processing when it is determined that the floor heating operation has not been performed within the past certain time immediately after the start of the floor heating operation processing (STEP 12: no in FIG. 2) has been described. On the other hand, when the floor heating operation has been performed within the past certain time (STEP 12: yes), it is determined whether the room temperature is equal to or higher than the target temperature −2 ° C. (STEP 14). As a result, if the room temperature does not exceed the target temperature of −2 ° C. (STEP 14: no), the process proceeds to STEP 18, and a series of processes similar to those in the case where the floor heating operation has not been performed within the past fixed time. Do. On the other hand, when the room temperature is equal to or higher than the target temperature −2 ° C. (STEP 14: yes), it is determined whether or not the indoor temperature is equal to or higher than the target temperature −1 ° C. (STEP 16). As a result, if the room temperature does not exceed the target temperature −1 ° C. (STEP 16: no), the process proceeds to STEP 26 to perform a high-temperature switching operation and a series of processes subsequent thereto. Further, when the room temperature is equal to or higher than the target temperature −1 ° C. (STEP 16: no), the process proceeds to STEP 34 and the low temperature switching operation is started immediately.

  When the low-temperature opening / closing operation is started as described above (STEP 36), it is subsequently determined whether or not the above-described floor heating operation switch is set to “OFF” (STEP 38), and when it is not set to “OFF” (STEP 38). : No) returns to STEP 34, sets the ratio of the open state of the thermal valve 130, and then continues the low temperature opening / closing operation (STEP 36). As a result, the room temperature is maintained at the target temperature during the low temperature opening / closing operation. When the floor heating operation switch is turned off (STEP 38: yes), the floor heating operation processing shown in FIGS. 2 and 3 is terminated.

C. Effect of high-temperature switching operation:
FIG. 4 is an explanatory diagram illustrating the measurement results of the room temperature and the floor temperature when the high-temperature opening / closing operation is performed by the floor heating operation process described above. In addition, FIG. 5 shows a measurement result when a conventional floor heating operation that does not go through a high-temperature switching operation is performed as a reference. 4 and 5, changes in the temperature of hot water supplied to the floor heating panel 200 are shown, and changes in the floor temperature and the room temperature are shown by broken lines and solid lines below, respectively. .

  As shown in FIG. 4, when the floor heating operation is started, 80 ° C. hot water is continuously supplied to the floor heating panel 200 and the high temperature continuous operation is started. As a result, as shown by the broken line in the figure, the bed temperature rises rapidly, and accordingly, the room temperature shown by the solid line also rises quickly. When the room temperature reaches the target temperature of −2 ° C. after the time Ta has elapsed from the start of operation, the hot water valve 130 is opened and closed at a constant cycle while the hot water temperature remains at 80 ° C., and the high temperature opening / closing operation is started. Since the thermal valve 130 opens and closes in the high-temperature opening / closing operation, the amount of heat per hour supplied to the floor heating panel 200 is reduced compared to the case of the high-temperature continuous operation, and as a result, the rising rate of the floor temperature and the room temperature is reduced. . Then, when the time Tb has elapsed from the start of the operation, the room temperature reaches the target temperature of −1 ° C., so this time, the operation is switched to the low temperature switching operation. In the low temperature opening / closing operation, the hot water temperature is set to 60 ° C., and the thermal valve 130 is repeatedly opened and closed at a ratio corresponding to the target temperature and the room temperature. As a result, the room temperature reaches the target temperature when the time Tc has elapsed from the start of the floor heating operation. Further, the bed temperature gradually decreases when the supplied hot water temperature is switched from 80 ° C to 60 ° C.

  FIG. 5 shows the measurement results of the floor temperature and the room temperature when the conventional floor heating operation that does not go through the high temperature switching operation is performed. Also in the conventional floor heating operation, since the high-temperature continuous operation is performed when the operation is started, the room temperature reaches the target temperature of −2 ° C. when the time Ta has elapsed from the start of the operation, as in FIG. However, after that, the temperature of the hot water is switched from 80 ° C. to 60 ° C., and the thermal valve 130 opens and closes at a constant cycle, thereby shifting to a low temperature opening / closing operation. In the low temperature switching operation, the amount of heat per hour supplied to the floor heating panel 200 is smaller than in the high temperature switching operation, so the rate of increase in the room temperature is smaller than in the case shown in FIG. A time Td longer than the time Tc shown in FIG. 4 is required to reach the target temperature. In other words, the room temperature can reach the target temperature in a shorter time by performing the floor heating operation of the present embodiment shown in FIG.

  Further, the floor temperature decreases corresponding to the change of the hot water temperature from 80 ° C. to 60 ° C., but in the conventional floor heating operation shown in FIG. 5, compared with the case shown in FIG. The decrease rate of the bed temperature increases. This is because in the conventional floor heating operation, the floor heating panel 200 is directly switched from the high temperature continuous operation in which 80 ° C. hot water is continuously supplied to the low temperature switching operation in which 60 ° C. hot water is intermittently supplied. This is because the amount of heat per hour (supplied heat amount) supplied to the water decreases rapidly. On the other hand, when the floor heating operation of the present embodiment shown in FIG. 4 is performed, the amount of heat supplied is smaller than that of the high temperature continuous operation but is lower than that of the low temperature switching operation while switching from the high temperature continuous operation to the low temperature switching operation. Since a high temperature switching operation with a large amount of supplied heat is performed, the amount of heat supplied to the floor heating panel 200 does not rapidly decrease. As a result, as shown in FIG. 4, the bed temperature slowly decreases. For this reason, by performing the floor heating operation of the present embodiment, it is possible to avoid a situation in which the user feels that the floor temperature has suddenly decreased.

  As mentioned above, although the hot water floor heating apparatus 1 of a present Example was demonstrated, this invention is not restricted to said Example, In the range which does not deviate from the summary, it can be implemented with a various aspect.

DESCRIPTION OF SYMBOLS 1 ... Hot water floor heating apparatus, 100 ... Hot water supply unit, 110 ... Heat source machine,
112 ... Heat exchanger, 114 ... Gas burner, 116 ... Combustion fan,
118 ... Solenoid valve, 120 ... Hot water passage, 122 ... Temperature sensor,
124 ... Systurn, 126 ... Circulation pump, 128 ... Bypass valve,
130 ... Thermal valve, 140 ... Controller, 200 ... Floor heating panel,
300 ... remote control, 302 ... liquid crystal display screen, 304 ... operation buttons,
306 ... Room temperature sensor

Claims (2)

A floor heating panel installed indoors;
A heat source machine that generates hot water;
A thermal valve provided on a hot water passage connecting the heat source unit and the floor heating panel, and opening and closing the hot water passage;
A control unit for controlling operations of the heat source unit and the thermal valve ;
Temperature detecting means for detecting the room temperature;
In a hot water floor heating apparatus that includes a temperature setting means for setting a target temperature for the control unit and performs floor heating operation ,
The controller is
First operating means for realizing a first operating state in which the thermal valve is opened and hot water having a predetermined first temperature is supplied to the floor heating panel;
During operation in the first operating state, when the room temperature reaches a predetermined first threshold temperature lower than the target temperature, it is determined that a predetermined first switching condition is satisfied , and the thermal valve is opened. Second operating means for realizing a second operating state in which hot water at the first temperature is supplied to the floor heating panel while repeating a state and a closed state;
During operation in the second operating state, determining that the when the room temperature reaches the first threshold temperature second threshold temperature lower predetermined than high and the target temperature than the predetermined second changeover condition is satisfied A third operation that realizes a third operation state in which hot water having a predetermined second temperature lower than the first temperature is supplied to the floor heating panel while the thermal valve repeats an open state and a closed state. together and means,
When the indoor temperature is lower than the first threshold temperature at the start of the floor heating operation, the floor heating operation is started by activating the first operation means,
If the room temperature is higher than the first threshold temperature but lower than the second threshold temperature at the start of the floor heating operation, the floor heating operation is started by activating the second operating means,
If the room temperature is higher than the second threshold temperature at the start of the floor heating operation, the third operation means is activated to start the floor heating operation.
A hot water floor heater characterized by that. In the warm water floor heating apparatus according to claim 1,
In the second operating state,
The thermal valve repeats an open state and a closed state at a predetermined constant cycle,
The ratio of the period of the open state in the fixed cycle is the amount of heat per hour received by the floor heating panel when the hot water of the second temperature is supplied with the thermal valve open. It is set to a larger ratio than the value divided by the amount of heat per hour received by the floor heating panel when hot water of the first temperature is supplied with the valve open.
A hot water floor heater characterized by that.

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