JP2016011769A - Bathroom heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bathroom heating device in which detection accuracy of an open/closed state of a bathroom door based on the temperature of the bathroom is enhanced.SOLUTION: When a bathroom heating operation is started at a predetermined time point, a heating controller 40 measures initial increase width, which is increase width of detection temperature by a bathroom temperature sensor 42 from the start of a bathroom heating operation until predetermined time has elapsed. Then, when the bathroom heating operation is started after the predetermined time point, the heating controller 40 detects that the bathroom door is open, when the increase width of the detection temperature by the bathroom temperature sensor 42 from the start of the bathroom heating operation until predetermined time has elapsed is equal to or less than a determination value Tth based on the initial increase width.

Description

  The present invention relates to a bathroom heating apparatus having a function of detecting an open / closed state of a bathroom door.

  Conventionally, the bathroom heating device has a means to detect the open / closed state of the bathroom door, and when the bathroom door is detected during the bathroom heating operation, the heating operation is stopped and an alarm is output. A configuration has been proposed (see, for example, Patent Documents 1 and 2).

  In the configuration described in Patent Document 1, it is detected that the bathroom door is open based on the temperature of the bathroom during heating operation. Moreover, in the structure described in patent document 2, it detects that the door of the bathroom is open by the door sensor.

JP-A-5-203359 JP 2001-330262 A

  When detecting that the bathroom door is open based on the temperature of the bathroom as in the bathroom heater described in Patent Document 1, the door sensor provided in the bathroom heater described in Patent Document 2 is used. Can be omitted.

  However, the present inventors have found that when detecting that the bathroom door is open based on the temperature of the bathroom, the detection accuracy may be reduced due to various factors.

  This invention is made | formed in view of this background, and it aims at providing the bathroom heating apparatus which raised the detection precision of the open / closed state of the bathroom door based on the temperature of a bathroom.

This invention is made | formed in order to achieve the said objective, The bathroom heating apparatus of this invention is
A circulation fan that circulates the air in the bathroom through an air circulation path;
An air heating section for heating air flowing through the air circulation path;
A bathroom temperature detector for detecting the temperature in the bathroom;
A control unit for performing a bathroom heating operation for heating the bathroom by operating the circulation fan and the air heating unit;
When the bathroom heating operation is started at a predetermined time point, the increase in the temperature detected by the bathroom temperature detection unit from the predetermined time until a predetermined time elapses is measured, and the bathroom temperature is measured based on the increase width. A judgment value setting unit for setting a judgment value for detecting the open / closed state of the door;
When the bathroom heating operation is started after the predetermined time, an increase in the detected temperature by the bathroom temperature detection unit from the start of the bathroom heating operation after the predetermined time until the predetermined time elapses. The door opening / closing detection unit detects that the bathroom door is open when the value is equal to or less than the determination value.

  In the present invention, the degree of increase in the bathroom temperature when the bathroom heating operation is started varies depending on the size of the bathroom, the capacity of the circulation fan and the air heater, and the like. Therefore, if the determination value is set to a fixed value, the detection accuracy of the bathroom door being opened by the door detection unit may be lowered depending on the usage environment of the bathroom heating device. In addition, although it is conceivable to set the determination value according to the size of the bathroom, the capacity of the circulation fan and the air heater, etc., in this case, individual correspondence according to the installation status of the bathroom heating device is possible. Since this is necessary, there is an inconvenience that the number of work steps during installation increases.

  Therefore, in the present invention, the determination value is set by the determination value setting unit based on the temperature rise width of the bathroom when the bathroom heating operation is started at the predetermined time point. And the said bathroom door detection part detects that the bathroom door is open using the said determination value. Thereby, since the determination value according to the use environment of the bathroom heating device can be easily set and the open / closed state of the bathroom door can be detected, the open / closed state of the bathroom door by the door open / close detection unit can be detected. Detection accuracy can be increased.

In addition, an outside air temperature detector that detects the outside air temperature,
A setting outside air temperature that is a detected temperature of the outside air temperature detecting unit when the determination value is set, and an outside air temperature detecting unit that detects that the bathroom door is opened by the door opening / closing detecting unit. The determination value is increased when the current outside air temperature is higher than the set outside air temperature according to the difference from the detected outside air temperature that is the detected temperature, and the current outside air temperature is set higher than the set outside air temperature. And a first determination value correction unit that reduces the determination value when the value is lower.

  According to this configuration, the determination value is corrected by the first determination value correction unit according to the ease of the temperature rise of the bathroom when the bathroom heating operation is started due to a difference in outside air temperature. The detection accuracy of the open / closed state of the bathroom door by the open / close detection unit can be further increased.

Moreover, the bathtub heat insulation detection part which detects that the bathtub heat insulation operation which maintains the temperature of the hot water in a bathtub in the predetermined temperature range is performed with the heat source machine which has the function to heat the hot water in a bathtub,
The determination value is increased when it is detected by the bathtub heat retention detection unit that the bathtub heat retention operation is being performed, compared to when the bathtub heat retention operation is not detected. And a second determination value correction unit.

  According to this configuration, when the bathroom heat insulation operation is being performed, the bathroom interior is warmed to some extent by heat dissipation from the hot water in the bathtub, so the temperature in the bathroom is increased when the bathroom heating operation is started. It is easy to rise. Therefore, the second determination value correction unit detects that the bathtub heat insulation operation is being performed when the second determination value correction unit detects that the bathtub heat insulation operation is being performed. The judgment value is made larger than when it is not. Thereby, since the said determination value is set according to the easiness of the temperature of a bathroom rising, the detection accuracy of the opening / closing state of the bathroom door by the said door opening / closing detection part can further be improved.

Explanatory drawing which shows the installation aspect of a bathroom heating apparatus. The block diagram of the bathroom heating apparatus shown in FIG. The 1st flowchart of the process which detects the opening / closing state of the door of a bathroom. Second flowchart of processing for detecting opening / closing state of bathroom door

  An embodiment of the present invention will be described with reference to FIGS.

  Referring to FIG. 1, a bathroom heating device 2 of the present embodiment is installed on the ceiling of a bathroom BR, and constitutes an air conditioning system 1 together with a heat source device 8 installed outdoors and a ventilation device 3 installed in the bathroom BR. ing.

  The heat source device 8 and the bathroom heating device 2 are connected by a hot water circulation path 12, and hot water heated by the heat source device 8 is circulated and supplied to the bathroom heating device 2.

  The ventilation device 3 includes a duct 22 that communicates with the ventilation port of the dressing room DR, a duct 24 that communicates with the ventilation port of the toilet TR, a bathroom inlet 17 (see FIG. 2) of the bathroom heating device 2, and an exhaust (not shown). ) Is connected to the duct 20, and the bathroom BR, the dressing room DR, and the toilet TR are ventilated by inhaling the air in the bathroom BR, the dressing room DR, and the toilet TR and exhausting the air outside through the exhaust port. Do.

  The dressing room DR is provided with a remote controller 34 for operating the bathroom heater 2 and the ventilator 3, and the toilet TR is provided with a toilet switch 35 for instructing the operation and stop of the ventilator 3.

  Next, referring to FIG. 2, the heat source device 8 and the bathroom heating device 2 are connected by a communication cable 41 so that they can communicate with each other, and the bathroom heating device 2 and the ventilation device 3 are connected by a communication cable 46. It is configured to be able to communicate with each other. The remote controller 34 is communicably connected to the bathroom heating device 2 and the ventilation device 3.

  The bathroom heating device 2 is provided in a casing 5 having a suction port and a blow-out port (not shown) communicating with the bathroom BR, in the middle of a circulation fan 7 driven by a motor 6 and a hot water circulation path 12. A heat exchanger 9 (corresponding to the air heating unit of the present invention) through which hot water supplied from the heat source unit 8 circulates, and a heating controller 40 (control unit of the present invention, determination value setting) for controlling the operation of the bathroom heating device 2 And the door opening / closing detection unit, the first determination value correction unit, and the second determination value correction unit).

  The air circulation path by the circulation fan 7 corresponds to the air circulation path of the present invention, and the heat exchanger 9 is provided in the middle of this circulation path.

  A variable louver 11 driven by a stepping motor 10 is provided at the outlet, and the direction of air flow from the bathroom heating device 2 to the bathroom BR can be changed by the variable louver 11. The hot water circulation path 12 between the heat source device 8 and the heat exchanger 9 is provided with a thermal valve 13 that opens and closes the hot water circulation path 12 and switches between supply and stop of hot water to the heat exchanger 9. Yes.

  A bathroom damper 27 driven by a stepping motor 26 is provided in the bathroom inlet 17 that communicates the bathroom BR with the ventilator 3, and the opening degree of the bathroom inlet 17 can be adjusted by the position of the bathroom damper 27. ing.

  Further, the bathroom heating device 2 includes a bathroom temperature sensor 42 (corresponding to the bathroom temperature detection unit of the present invention) that detects the temperature in the bathroom BR, and a bathroom water temperature sensor that detects the temperature of the hot water in the hot water circuit 12. 43.

  The heating controller 40 is a control unit configured with a CPU, a memory, an interface circuit, and the like (not shown), and the bathroom heating device 2 is executed by the CPU executing a control program for the bathroom heating device 2 stored in the memory. Serves to control the operation of

  The heating controller 40 receives a temperature detection signal from the bathroom temperature sensor 42, a temperature detection signal from the bathroom water temperature sensor 43, and an operation signal from the remote controller 34. The operation of the circulation fan 7, the variable louver 11, the thermal valve 13, and the bathroom damper 27 is controlled by a control signal output from the heating controller 40.

  When the start operation of bathroom heating is performed by the remote controller 34, the heating controller 40 opens the thermal valve 13 and transmits a signal requesting the supply of hot water to the heat source device 8, whereby the heat source device 8. Supply of hot water to the heat exchanger 9 is started, and the bathroom air intake 17 is closed by the bathroom damper 27 and the circulation fan 7 is operated to execute the bathroom heating operation. The configuration in which the heating controller 40 performs the bathroom heating operation corresponds to the control unit of the present invention.

  Further, the heating controller 40 opens the bathroom air inlet 17 by the bathroom damper 27 and transmits a signal instructing the ventilation device 3 to perform the ventilation operation when the remote controller 34 starts the bathroom ventilation. The bathroom drying operation is executed by operating the ventilation device 3.

  The ventilation device 3 is configured by housing a ventilation fan 16 driven by a motor 15 and a ventilation controller 45 in a housing 14 adjacent to the housing 5 of the bathroom heating device 2. The housing 14 includes a bathroom air inlet 17 communicating with the bathroom BR via the bathroom heating device 2, a dressing room air inlet 18 communicating with the dressing room DR, and a bathroom air inlet 19 communicating with the toilet TR. An exhaust port 21 communicating with the outside via the duct 20 is formed.

  By the operation of the ventilation fan 16, air is sucked from the bathroom air inlet 17, the dressing room air inlet 18, and the toilet air inlet 19 and is discharged to the outside through the air outlet 21. A duct 22 (see FIG. 1) communicating with the dressing room DR is connected to the dressing room air inlet 18 via a pipe joint 23. Similarly, a duct 24 (see FIG. 1) communicating with the toilet TR is connected to the toilet inlet 19 via a pipe joint 25.

  The dressing room intake 18 is provided with a dressing room damper 29 driven by a stepping motor 28, and the dressing room damper 29 can open and close the dressing room intake 18 and adjust the opening. Yes. Similarly, a toilet damper 31 driven by a stepping motor 30 is provided at the toilet inlet 19, and the toilet damper 31 can be opened and closed and the opening thereof can be adjusted.

  The ventilation controller 45 is a control unit that includes a CPU, a memory, an interface circuit, and the like (not shown). The ventilation controller 3 operates by executing a control program for the ventilation device 3 stored in the memory by the CPU. It fulfills the function of controlling.

  An operation signal from the remote controller 34 and an operation signal from the toilet switch 35 are input to the ventilation controller 45. The operation of the ventilation fan 16, the dressing room damper 29, and the toilet damper 31 is controlled by a control signal output from the ventilation controller 45.

  When the ventilation controller 45 receives a signal instructing ventilation of the dressing room DR from the remote controller 34, the ventilation controller 45 opens the dressing room air inlet 18 by the dressing room damper 29 and operates the ventilation fan 16, thereby causing the dressing room DR. Perform ventilation operation.

  Further, when the ventilation controller 45 receives a signal instructing ventilation of the toilet TR from the toilet switch 35, the ventilation controller 16 opens the toilet intake port 19 by the toilet damper 31 and operates the ventilation fan 16. Perform ventilation operation.

  Furthermore, the ventilation controller 45 operates the ventilation fan 16 when receiving a signal for instructing ventilation of the bathroom BR from the heating controller 40. In this case, the heating controller 40 changes the ventilation amount of the bathroom BR by adjusting the opening of the bathroom inlet 17 by the bathroom damper 27.

  The heat source unit 8 includes a heat source controller 50 that controls the operation of the heat source unit 8, and an outside air temperature sensor 51 (corresponding to the outside air temperature detection unit of the present invention) that detects the ambient temperature (outside air temperature) of the heat source unit 8. ing.

  In addition to the configuration in which the outside air temperature sensor 51 is provided exclusively, the temperature detected by the water supply temperature sensor that detects the temperature of water in the water supply channel (not shown) may be used as the outside air temperature. Furthermore, it is good also as a structure which uses the detection temperature of the temperature sensor for the low temperature detection provided in order to perform the freeze prevention process of the heat-source apparatus 8 as outside temperature. When these configurations are employed, the feed water temperature sensor and the temperature sensor for low temperature detection correspond to the outside air temperature detection unit of the present invention.

  When the heat source controller 50 receives a signal requesting the supply of hot water from the bathroom heating device 2, the heat source controller 50 (not shown) includes a heating unit (not shown) and a heat exchanger (not shown) provided in the hot water circulation path 12. And a circulating pump is operated to supply hot water to the bathroom heating device 2 via the hot water circulation path 12.

  Next, the detection process of the open / closed state of the door 60 of the bathroom BR, which is executed by the heating controller 40 at the start of the bathroom heating operation, will be described according to the flowcharts shown in FIGS.

  The heating controller 40 is activated when power supply to the bathroom heating device 2 is started, and waits for an operation to start bathroom heating by the remote controller 34 in STEP 1. Then, when the start operation of bathroom heating is performed by the remote controller 34, the process proceeds to STEP2.

  In STEP2, the heating controller 40 stores the temperature (current room temperature) Trm detected by the bathroom temperature sensor 42 in a memory (not shown) as the heating start temperature Ta. In subsequent STEP 3, the heating controller 40 starts bathroom heating operation and waits for a predetermined time (for example, 5 minutes) in STEP 4.

  In the next STEP 5, the heating controller 40 determines whether or not the bathroom heating operation started this time is the first operation after turning on the power. If it is the first operation, the process proceeds to STEP 6, and if it is not the first operation, the process branches to STEP 40 in FIG.

  In STEP 6, the heating controller 40 stores the detected temperature (current outside air temperature) Tout of the outside air temperature sensor 51 in the memory as the set outside air temperature Tb. In subsequent STEP 7, the heating controller 40 measures the current detected temperature (current room temperature) Trm of the bathroom temperature sensor 42, and the increase range (Trm−Ta) of the bathroom temperature from the heating start temperature Ta is less than 3 ° C. Judge whether there is.

  The difference between the current room temperature Trm and the heating start temperature Ta is 3 ° C. or more, the temperature rise of the bathroom BR from the start of the bathroom heating operation is normal, and the door 60 of the bathroom BR is closed. If it can be determined, proceed to STEP 30. In STEP 30, the heating controller 40 stores the difference between the current room temperature Trm and the heating start temperature Ta in the memory as a determination value Tth for detecting the open / closed state of the door 60 of the bathroom BR at the start of the next bathroom heating operation. To do.

  On the other hand, if the difference between the current room temperature Trm and the heating start temperature Ta is less than 3 ° C. in STEP 7 and the temperature of the bathroom BR is little increased from the start of the bathroom heating operation, the bathroom BR door 60 is open. If it can be determined, proceed to STEP8. In STEP 8, the heating controller 40 stores 3 ° C. in the memory as a provisional value of the determination value Tth for detecting the open / closed state of the door 60 of the bathroom BR.

  In subsequent STEP 9, the heating controller 40 stops the bathroom heating operation, displays an alarm on the display unit of the remote controller 34, and notifies the user that the door 60 of the bathroom BR is open.

  Here, the configuration in which the determination value Tth is set by the processing of STEP2 to STEP7 and STEP30 corresponds to the determination value setting unit of the present invention. In STEP 30, the difference between the current room temperature Trm and the heating start temperature Ta (Trm−Ta) is used as the determination value. However, Trm−Ta + α (α is an adjustment value determined by an experiment or the like) may be used as the determination value. Further, the time when the bathroom heating operation is started in STEP 3 corresponds to the predetermined time of the present invention.

  Next, in STEP 40 of FIG. 4, the heating controller 40 determines the difference β between the set outside temperature Tb stored at the time of the previous update of the determination value Tth and the current detected temperature (current outside temperature) Tout of the outside temperature sensor 51. Based on (= Tb−Tout), the determination value Tth is corrected so as to reduce the influence of the difference in outside air temperature. Specifically, for example, according to the following equation (1), correction is performed to increase the determination value when β is negative (Tb <Tout) and decrease the determination value Tth when β is positive (Tb> Tout). .

Tth-K × β → Tth (1)
However, K: constant (determined by experiment etc.).

  Here, the configuration in which the determination value Tth is corrected based on the difference between the set-time outside air temperature Tb and the current outside air temperature Tout by the processing of STEP 40 corresponds to the first determination value correction unit of the present invention.

  In subsequent STEP 41, the heating controller 40 determines that the difference between the current temperature detected by the bathroom temperature sensor 42 (current bathroom) Trm and the heating start temperature Ta (the increase in bathroom temperature from the start of heating operation) is a determination value. It is determined whether or not it is equal to or greater than Tth.

  Then, when the increase in the bathroom temperature from the start of the heating operation is equal to or greater than the determination value Tth, it is detected that the door 60 of the bathroom BR is closed, and the process proceeds to STEP42. In STEP42, the heating controller 40 stores the difference (Trm−Ta) between the current room temperature Trm and the heating start temperature Ta as a new determination value Tth (update of the determination value Tth). The configuration in which the determination value Tth is set in STEP 42 corresponds to the determination value setting unit of the present invention.

  In the next STEP 43, the heating controller 40 stores the current outside air temperature Tout as a new set outside air temperature Tb (update of the setting outside air temperature Tb). In this case, the heating controller 40 continues the bathroom heating operation. The configuration for detecting the open / closed state of the door 60 of the bathroom BR by the processing of STEP 41 corresponds to the bathroom door detection unit of the present invention.

  On the other hand, when the increase in the bathroom temperature from the start of the heating operation is smaller than the determination value Tth in STEP 41, the heating controller 40 detects that the door 60 of the bathroom BR is open and branches to STEP 50.

  In STEP 41, the heating controller 40 stops the bathroom heating operation, displays an alarm on the display unit of the remote controller 34, and notifies the user that the door 60 of the bathroom BR is open.

  In the present embodiment, the heating controller 40 corrects the determination value Tth according to the outside air temperature by the above formula (1), but the effect of the present invention can be obtained even when this correction is not performed. it can.

  Moreover, when the heat source machine 8 is performing the bathtub heat insulation operation which maintains the hot water in a bathtub in the predetermined temperature range, it is assumed that the inside of the bathroom BR is warmed to some extent by heat radiation from the hot water in the bathtub. Therefore, a process of correcting the determination value Tth when the heat insulation operation is performed to a value smaller than the determination value Tth when the heat insulation operation is not performed may be performed. The configuration for performing this correction corresponds to the second determination value correction unit of the present invention. Moreover, the structure which the heating controller 40 detects that the bathtub heat insulation driving | running | working is performed by communication with the heat source controller 50 is equivalent to the bathtub heat insulation detection part of this invention.

  In the present embodiment, the heating controller 40 detects the open / closed state of the door BR of the bathroom BR at the start of the bathroom heating operation. However, the bathroom heating operation is also performed at the start of the bathroom drying operation to perform the door heating of the bathroom BR. It is also possible to detect the open / closed state. Further, when the bathroom heating device 2 has a function of performing other operations performed by closing the door 60 such as a mist sauna operation, the opening / closing state of the door 60 is performed by executing the bathroom heating operation at the start of these other operations. May be detected.

  Moreover, in this embodiment, although the bathroom heating apparatus which heats the air in a bathroom with the hot water supplied from the heat source machine 8 was shown, it is the bathroom heating apparatus which heats the air in a bathroom by other structures, such as an electric heater. In contrast, the present invention can be applied to detect the open / closed state of a bathroom door.

  DESCRIPTION OF SYMBOLS 1 ... Air conditioning system, 2 ... Bathroom heating device, 3 ... Ventilation device, 8 ... Heat source machine, 12 ... Hot water circuit, 13 ... Thermal valve, 16 ... Ventilation fan, 27 ... Bathroom damper, 34 ... Remote control, 40 ... Heating Controller (control unit, determination value setting unit, door opening / closing detection unit, first determination value correction unit, second determination value correction unit), 42 ... bathroom temperature sensor, 45 ... ventilation controller, 50 ... heat source controller, 51 ... outside temperature Sensor.

Claims (3)

A circulation fan that circulates the air in the bathroom through an air circulation path;
An air heating section for heating air flowing through the air circulation path;
A bathroom temperature detector for detecting the temperature in the bathroom;
A control unit for performing a bathroom heating operation for heating the bathroom by operating the circulation fan and the air heating unit;
When the bathroom heating operation is started at a predetermined time point, the increase in the temperature detected by the bathroom temperature detection unit from the predetermined time until a predetermined time elapses is measured, and the bathroom temperature is measured based on the increase width. A judgment value setting unit for setting a judgment value for detecting the open / closed state of the door;
When the bathroom heating operation is started after the predetermined time, an increase in the detected temperature by the bathroom temperature detection unit from the start of the bathroom heating operation after the predetermined time until the predetermined time elapses. A bathroom heating apparatus comprising: a door opening / closing detection unit that detects that the bathroom door is open when the value is equal to or less than the determination value. In the bathroom heating device according to claim 1,
An outside temperature detector for detecting the outside temperature;
A setting outside air temperature that is a detected temperature of the outside air temperature detecting unit when the determination value is set, and an outside air temperature detecting unit that detects that the bathroom door is opened by the door opening / closing detecting unit. The determination value is increased when the current outside air temperature is higher than the set outside air temperature according to the difference from the detected outside air temperature that is the detected temperature, and the current outside air temperature is set higher than the set outside air temperature. A bathroom heating device, comprising: a first determination value correction unit that decreases the determination value when the value is lower. A bath heat insulation detection unit for detecting that a bath heat insulation operation for maintaining the temperature of the hot water in the bathtub within a predetermined temperature range is performed by a heat source device having a function of heating the hot water in the bathtub;
The determination value is increased when it is detected by the bathtub heat retention detection unit that the bathtub heat retention operation is being performed, compared to when the bathtub heat retention operation is not detected. A bathroom heating device comprising a second determination value correction unit.