JP2944478B2 - Heating dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating and drying machine for heating or drying indoor air such as a bathroom, for example, and more particularly, to a ventilation means for circulating and ventilating indoor air through a ventilation path, Heating means for heating the air flowing through the ventilation path, temperature detection means for detecting the temperature of the air, and control means for controlling the heating operation of the heating means and the ventilation operation of the ventilation means The control means, when the ventilation operation of the ventilation means is executed, based on the detection information of the temperature detection means, to maintain the temperature of the air in an appropriate temperature range,
The present invention relates to a heating drier configured to execute temperature control for controlling a heating operation of the heating unit.

[0002]

2. Description of the Related Art In a heating / drying machine having the above structure, while a normal operation is being performed, the heating operation of the heating means is controlled while the ventilation means is performing the ventilation operation. The room air was maintained at an appropriate temperature range.

However, when the heating means cannot operate normally due to some abnormality, the heating means cannot be controlled properly regardless of the detection information of the temperature detecting means. In addition, there is a possibility that the temperature of the air may be out of the appropriate temperature range. For example, when the heating means is in a so-called on-failure state, that is, when the heating state continues regardless of the stop command of the control means, and the heating operation is in an abnormal state where the heating operation cannot be stopped, There was a risk that the temperature in the room would be higher than the appropriate temperature range. Further, when an OFF failure occurs (a state in which the heating operation cannot be performed), the room temperature does not rise while the temperature is lower than the appropriate temperature range, and a desired heating or drying function may not be exhibited. Was.

In order to cope with such a disadvantage, a configuration is conceivable in which, when such an abnormal state occurs, the abnormal state is notified by a notification means such as an alarm lamp.

[0005]

By the way, in this type of heating / drying machine, for the purpose of heating in advance before entering the room, or drying the object to be dried (clothing, etc.) in the room, etc. It is often used, and the above-described driving operation is often performed without a user in a room to be heated or dried.

As a result, when the above-described abnormal condition occurs, even if the notification unit notifies the abnormal state,
In many cases, the user is in a remote place where the user cannot recognize the notification state, and the abnormal state may not be recognized in a short time. Then, for example, there is a disadvantage that a high temperature state in which the temperature of the room is out of the appropriate temperature range continues for a long time, and in such a case, the wall material and the sealing material provided in the room are abnormally dried. There was a risk of peeling off.

The present invention has been made in view of such a point, and an object of the present invention is to provide a rational configuration in which when an abnormal operation of the heating means occurs, the temperature of the air is out of an appropriate temperature range. An object of the present invention is to provide a heating / drying machine that can prevent a state from continuing for a long time.

[0008]

According to the first aspect of the present invention, while the normal operation is being performed, the control means is provided.
Is added to the heat medium by the heat source unit according to the operation start command.
The heat supply operation and the ventilation operation of the ventilation means are started.
The switching valve between the heating medium supply state and the supply stop state.
By performing the temperature control by switching
The heat medium heated by the heat source unit is
The air is supplied to an exchanger, and the air exchanges heat with the heat medium.
Heating. Then, the supply state of the heating medium
Temperature control is executed by switching
With, the heating supply operation of the heat source device, and,
The operation is stopped by stopping the ventilation operation of the ventilation means.
Becomes Then, the control means executes the temperature control.
In, based on the detection information of the temperature detection means,
When it is determined that the operation of the switching valve is abnormal, the ventilation
The ventilation operation of the step is stopped, and the heating of the heat source unit is stopped.
It is configured to stop the heat supply operation.
Make sure that air with a temperature outside the
Is abnormal, and the room temperature is out of the appropriate temperature range.
The temperature can be prevented beforehand, and the heat exchanger
The supply of the heat medium to the heat exchanger is stopped and the heat medium is supplied to the heat exchanger.
And the internal temperature of the ventilation path rises abnormally.
Ascent can be reliably prevented.

As a result, for example, it is possible to prevent disadvantages such as the room temperature becoming abnormally high outside the appropriate temperature range and the wall material and the sealing material in the room coming off. Further, while the temperature control is being performed, disadvantages such as an abnormally low indoor temperature due to the operation abnormality of the switching valve as described above can be avoided, and the indoor temperature is kept within the appropriate temperature range as much as possible. It can be maintained.

In addition, since the operation abnormality is determined based on the detection information of the temperature detection means, the configuration can be simplified as compared with a configuration in which dedicated detection means for determining abnormality of the switching valve is provided. Can be.

According to a second aspect of the present invention, when the control means determines that the operation is abnormal, the control means causes the notification means to execute the notification operation. The user can be made aware of the occurrence of the abnormal condition, and disadvantages such as erroneous continuation of driving without the user knowing the situation can be avoided.

According to a third aspect of the present invention, when the detected value of the temperature detecting means is lower than the first set temperature, the control means starts the heating operation by the heating means, and the detected value becomes the first set temperature.
When the temperature exceeds a second set temperature higher than the set temperature, the heating operation by the heating means is stopped to execute the temperature control, and the detected value is set to a third set temperature higher than the second set temperature. When the temperature control is executed in a normal state, the temperature of the indoor air is changed from the first set temperature to the second set temperature when the temperature control is performed in a normal state. Although the control is performed so as to be maintained within the appropriate temperature range, for example, even though the control is performed to stop the heating operation of the heating unit when the detected value exceeds the second set temperature, the control is performed. Detection value is 3rd
If the temperature exceeds the set temperature, it is determined that the operation of the heating means is abnormal, and the ventilation operation is stopped.

Therefore, it is possible to reliably prevent the room temperature from becoming higher than the third set temperature, and
Since the control of the ventilation stop is performed in the determination of the level of the detection value, the control configuration can be simplified as compared with the configuration in which the differential value and the duration of the temperature detection value are calculated, and the time delay is minimized. Appropriate measures can be taken in a small number of situations.

According to a fourth aspect of the present invention, the control means, after instructing the heating means to start the heating operation, sets a state in which the amount of increase in the detected value of the temperature detecting means is equal to or less than the set amount for a set time. If the above operation is continued, or if the state in which the amount of decrease in the detection value of the temperature detection unit is equal to or less than the set amount continues for a set time after instructing the heating unit to stop the heating operation, the operation is determined to be abnormal. Therefore, for example, compared to a configuration in which the detected value deviates from the appropriate temperature range by a level determination for a set temperature that deviates from the appropriate temperature range, an abnormality is determined due to a detection error or the like of the temperature detecting unit. Thus, accurate determination can be performed without disadvantage such as erroneously determining an operation abnormality based on a temporary detection abnormal value.

According to a fifth aspect of the present invention , there is provided the image forming apparatus according to the first aspect.
Since the heat medium supplied to the heat exchanger is hot water, the heat medium is supplemented.
Supplying can be easily performed, and the temperature of the heat medium is set to 100 ° C.
Temperature does not exceed
Even if normal conditions occur, the heat is
Air temperature (temperature in ventilation passage) exceeds 100 ° C
Such an abnormally high temperature does not occur, and it is close to the heat exchanger.
The effect of temperature on each device and other supporting members
Can be reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A heating and drying machine for a bathroom will be described below as an example of a heating and drying machine according to the present invention. As shown in FIG. 2 and FIG. 3, the heating / drying machine A is installed on the ceiling surface 2 of the bathroom 1 and has a function of circulating the air in the bathroom 1 to heat or dry, and a function of ventilating the air in the bathroom 1. It is configured with functions.

More specifically, a main body case 3 of a heating / drying machine having an open lower side is mounted from above the ceiling surface 2 in a state of facing into the bathroom 1 through an opening 2a formed in the ceiling surface 2 of the bathroom 1. The cover body 6 provided with the intake port 4 and the discharge port 5 from below the ceiling surface 2 is attached to the main body case 3. A louver 7 is provided at each of the intake port 4 and the discharge port 5.
The main body case 3 is provided with an exhaust duct 8 connected to an external exhaust port (not shown).

In the main body case 3, the air in the bathroom 1 is sucked from the air inlet 4 and is circulated through the air passage L formed by the main body case 3 so as to return to the interior of the bathroom 1 from the outlet 5. A ventilation fan 9 as ventilation means is provided, and a heat exchanger 10 for heating the flowing air is provided in the ventilation path L. A thermistor 11 is provided in the main body case 3 as temperature detecting means for detecting the temperature of the air sucked from the intake port 4 (that is, the temperature of the air in the bathroom 1). A flow path switching plate 12 is provided to switch between a state in which air flowing through the flow fan 9 flows toward the heat exchanger 10 and a state in which air flows toward the exhaust duct 8. The plate 12 is configured to be switched to each of the above states by an electric motor 13 with a speed reduction mechanism. That is, by switching the flow path switching plate 12 to a state in which air flows toward the heat exchanger 10, a function of circulating the air in the bathroom 1 to heat or dry can be exhibited.
By switching to a state of flowing toward the exhaust duct 8, a function of ventilating the air in the bathroom 1 can be exhibited.

As shown in FIG. 1, hot water (an example of a heating medium) heated to a set temperature (80 ° C.) from a heat source unit 14 is supplied to the heat exchanger 10, and passes through a ventilation passage L. It is configured to heat the flowing air by exchanging heat with the heat medium. The hot water supply path from the heat source unit 14 to the heat exchanger 10 includes a hot water supply state for supplying hot water to the heat exchanger 10 and a supply stop state for stopping the supply. A thermal valve 15 is provided. Although not shown, the thermal valve 15 is configured so that the thermo pellets contained therein are opened by being expanded by being heated, and are provided with an electric heater for heating the thermo pellets. The valve is opened at a relatively low speed by energizing the electric heater as compared with a solenoid valve or the like. In this way, a large amount of hot water is rapidly supplied from the heat source unit 14 so as not to damage the heat exchanger 10 or generate an impact sound. The heat source unit 14 is configured to always supply hot water at a set temperature in the operating state. As described above, the heating means K configured to heat the air flowing through the ventilation passage L is configured by the heat source device 14, the heat exchanger 10, and the thermal valve 15.

A control unit H is provided as control means for controlling the heating operation of the heating means K and the ventilation operation of the ventilation fan 9. The control unit H executes the ventilation operation of the ventilation fan 9. When the air conditioner is in operation, temperature control for controlling the heating operation of the heating means K is executed based on the detection information of the thermistor 11 so that the temperature of the air is maintained in an appropriate temperature range. The control unit H is configured to control the switching electric motor 13 of the flow path switching plate 12 based on the commanded operation state.

A remote controller R for instructing the controller H to control information is provided. The remote controller R starts / starts an operation for heating (or drying) the air in the bathroom 1.
A heating (drying) switch SW1 for commanding a stop, a ventilation switch SW2 for commanding ventilation in the bathroom 1, an operation time setting dial TM for setting an operation time of a heating or drying operation, and when an operation abnormality is determined as described later. In addition, the apparatus is provided with an abnormality display lamp 16 and the like as a notifying means for notifying that.

The control unit H is configured to determine whether or not the operation of the thermal valve 15 is abnormal based on the detection information of the thermistor 11 during the execution of the temperature control. If it is determined that there is an abnormality, the ventilation operation of the ventilation fan 9 is stopped, and
To stop the hot water supply operation.

Hereinafter, the heating (drying) operation of the controller H will be described with reference to the control flowchart of FIG. When the start of the operation is instructed by operating the heating (drying) switch SW1, the thermal valve 15 is opened and the heat source unit 14 is opened.
, The hot water is heated to supply the heated hot water to the heat exchanger 10, and the ventilation operation of the flow fan 9 is started (steps 1 and 2). Thermistor 11
If the temperature of the air detected by the above exceeds the second set temperature (specifically, if it is 50 ° C. or more), the heat valve 15 is closed (steps 3 and 4), and the heat exchanger 10 The hot water supply to the reactor. Thereafter, when the temperature of the air detected by the thermistor 11 falls below the first set temperature (specifically, when it becomes 40 ° C. or less), the thermal valve 15 is opened (steps 7 and 8), The hot water is supplied to the heat exchanger 10. In this way, the temperature control is executed by opening and closing the thermal valve 15 so that the temperature of the air in the bathroom 1 is maintained in an appropriate temperature range of 40 ° C. to 50 ° C. still,
While this temperature control is being executed, the heat source unit 14 maintains the operating state (the state of heating and supplying hot water) irrespective of the opening and closing operation of the thermal valve 15, and when the thermal valve 15 is closed, the hot water is supplied. It is circulated internally.

When the operation time reaches the operation time set by the setting dial TM, if the thermal valve 15 is in the open state, the thermal valve 15 is closed and the hot water supply operation of the heat source unit 14 is performed. And the ventilation operation of the flow fan 9 is stopped, respectively, to terminate the heating (drying) operation (steps 5, 9, 10, 1).
1).

In a state where the temperature of the air detected by the thermistor 11 exceeds the second set temperature and the thermal valve 15 is closed, the temperature of the air detected by the thermistor 11 becomes the third set temperature. (Specifically, the temperature exceeds 60 ° C.), the thermal valve 15 is not closed even though the valve closing command is issued. It is determined that there is an abnormality, and immediately, the ventilation operation of the ventilation fan 9 is stopped, and the hot water supply operation of the heat source unit 14 is stopped (steps 6 and 1).
2). Further, the abnormality indicator lamp 16 is turned on to notify the user of the abnormal stop state in which the operation has stopped due to the occurrence of the abnormality (step 13).

When such an abnormal operation occurs, the abnormal stop state is maintained until maintenance processing such as repair and replacement is completed and a reset operation is performed by a maintenance worker (step 14).

Although not described in detail, when "heating (drying)" is commanded, the flow path switching plate 12 is switched to a state in which the flowing air flows toward the heat exchanger 10, and the ventilation is performed. When "ventilation" is commanded by operating the switch SW2,
The control unit H is configured to control the electric motor 13 so that the flow path switching plate 12 is switched to a state of flowing toward the exhaust duct 8.

[Another Embodiment] (1) Instead of a configuration in which an abnormality display lamp is turned on, a configuration may be adopted in which an alarm buzzer is sounded to notify the user of the operation abnormality. The notification by the alarm buzzer may be executed together. Further, the configuration may be such that the notification means is not provided.

(2) The control for judging the operation abnormality may be configured as follows. In other words, after the start of the heating operation to the heating means is instructed (corresponding to the operations in steps 2 and 8 in the flowchart shown in FIG. 4), the state in which the amount of increase in the detection value of the thermistor is equal to or smaller than the set amount If it lasts more than hours,
Alternatively, after instructing the heating means to stop the heating operation (corresponding to the operation of Step 4 in the flowchart shown in FIG. 4), the state where the amount of decrease in the detection value of the thermistor is equal to or less than the set amount continues for the set time or more. If you do
It may be configured to determine that the operation is abnormal.

As described above, the abnormality is determined based on whether or not the abnormal state of the temperature change continues for the set time, thereby minimizing the possibility of a malfunction due to the sudden detection abnormality of the thermistor and the like. Operation abnormality can be determined.

(3) As a heat medium supplied to the heat exchanger
In addition, instead of hot water, heat
A medium may be used.

Incidentally, reference numerals are written in the claims to facilitate comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a control configuration diagram of a heating dryer.

FIG. 2 is a perspective view showing an attached state.

FIG. 3 is a vertical sectional side view of a heating dryer.

FIG. 4 is a flowchart of a control operation.

[Explanation of symbols]

 Reference Signs List 9 ventilation means 10 heat exchanger 11 temperature detection means 14 heat source device 15 switching valve 16 notification means H control means K heating means L ventilation path

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F24D 15/00 D06F 58/10 F24D 5/02

Claims (5)

(57) [Claims] A ventilation means (9) for circulating and ventilating indoor air through a ventilation path (L), and provided in the ventilation path (L) to heat air flowing through the ventilation path (L). Heating means (K) for performing heating, temperature detecting means (11) for detecting the temperature of the air, and control means (H) for controlling the heating operation of the heating means (K) and the ventilation operation of the ventilation means (9). The control means (H) adjusts the temperature of the air based on the detection information of the temperature detection means (11) when the ventilation operation of the ventilation means (9) is performed. A heating dryer configured to execute a temperature control for controlling a heating operation of the heating unit (K) so as to be maintained in a temperature range, wherein the heating unit (K) includes a heat source unit (14). Is supplied by the heating medium heated by
The air is heated by exchanging heat with the heat medium.
A heat exchanger that supplies the heat medium to the heat exchanger (10).
Switch between supply state and supply stop state to stop supply
The control means (H) is configured to include a free switching valve (15), and the temperature detection means (1)
The operation of the switching valve (15) based on the detection information of ( 1).
It is configured to determine whether there is an abnormality, and
In response to the rotation start command, the heat medium (14)
The heating supply operation and the ventilation operation of the ventilation means (9)
Then, the switching valve (15) is switched to the heating medium supply state.
The temperature control is performed by switching to a supply stop state.
And the heat source unit (14)
And the ventilation of the ventilation means (9)
The operation is stopped , and during the execution of the temperature control,
If it is determined that there is, the ventilation operation of the ventilation means (9)
And heating supply of the heat source device (14)
A heating dryer configured to stop operation . 2. A notifying means (16) for notifying that an abnormal state is provided, and when the control means (H) determines that the operation is abnormal, the notifying means (16) sends a notifying operation to the notifying means (16). The heating / drying apparatus according to claim 1, wherein the heating / drying apparatus is configured to be executed. 3. The control means (H) starts a heating operation by the heating means (K) when a detection value of the temperature detection means (11) falls below a first set temperature, and the detection value is When the temperature exceeds a second set temperature higher than the first set temperature, the heating operation by the heating means (K) is stopped to execute the temperature control, and the detected value is set to the second set temperature. 3. The heating / drying machine according to claim 1, wherein when the temperature exceeds a third set temperature higher than the set temperature, the operation is determined to be abnormal. 4. The control means (H), after instructing the heating means (K) to start a heating operation, sets a state in which the amount of increase in the detection value of the temperature detection means (11) is equal to or less than a set amount. The state where the amount of decrease in the detection value of the temperature detecting means (11) is equal to or less than the set amount continues for the set time or more after the set time or after instructing the heating means (K) to stop the heating operation. The heating / drying device according to claim 1, wherein the operation / drying is determined when the operation is abnormal. 5. The heating medium according to claim 1, wherein said heating medium is hot water.
Or the heating dryer according to 4.