CN118339411A - Heating device - Google Patents

Abstract

The heating device (10) comprises a heater (32), a fan (50), a sensor (70) and a control unit (C), wherein the heater (32) heats air flowing through an air passage (P), the fan (50) is arranged in the air passage (P), the sensor (70) detects the temperature of air blown out from a blow-out port (21), and the control unit (C) controls the rotation speed of the fan (50) and the output of the heater (32) according to the temperature detected by the sensor (70).

Description

Heating device

Technical Field

The present disclosure relates to a heating device.

Background technique

Patent document 1 discloses a heating device. The heating device includes a housing, an electric heater, and a fan. The housing is provided with an inlet and an outlet. The electric heater heats air and the fan delivers air. When the heating device heats the air using the electric heater, the air volume of the fan is increased or decreased according to the detection value of the temperature sensor.

Prior art literature

Patent Literature

Patent Document 1: Japanese Patent Publication No. 2018-066552

Summary of the invention

－Technical problem to be solved by the invention－

As disclosed in Patent Document 1, even if the air volume of the fan is increased or decreased according to the detection value of the temperature sensor, it is difficult to finely adjust the temperature of the blown air supplied from the heating device to the target space.

An object of the present disclosure is to provide a heating device capable of finely adjusting the temperature of blown air.

-Technical solutions to solve technical problems-

A first aspect of the present disclosure relates to a heating device, which includes a shell 11, a heater 32, a fan 50, a sensor 70 and a control unit C. The shell 11 is provided with an inlet 20, a blow-out port 21, and an air passage P extending from the inlet 20 to the blow-out port 21. The heater 32 heats air flowing through the air passage P. The fan 50 is arranged in the air passage P. The sensor 70 detects the temperature of the blown air blown out from the blow-out port 21. The control unit C controls the rotation speed of the fan 50 and the output of the heater 32 according to the detected temperature of the sensor 70.

In the first aspect, the control unit C controls the rotation speed of the fan 50 and the output of the heater 32 according to the temperature of the blown air detected by the sensor 70. Therefore, by controlling the rotation speed of the fan 50 and the output of the heater 32, the temperature of the blown air can be finely adjusted.

In the second aspect, based on the first aspect, the control unit C reduces the rotation speed of the fan 50 when the detected temperature of the sensor 70 is lower than the first value and the rotation speed of the fan 50 is higher than the target value, and increases the output of the heater 32 when the detected temperature of the sensor 70 is lower than the first value and the rotation speed of the fan 50 is lower than the target value.

In the second aspect, when the temperature of the blown air is low and the rotation speed of the fan 50 is higher than the target value, the control unit C reduces the rotation speed of the fan 50. This allows the temperature of the blown air to be rapidly increased while the rotation speed of the fan 50 is brought close to the target value. Since it is possible to suppress the low-temperature blown air from being supplied to the target space at a large air volume, it is possible to avoid loss of user comfort.

When the temperature of the blown air is low and the rotation speed of the fan 50 is lower than the target value, the control unit C increases the output of the heater 32. This makes it possible to quickly increase the temperature of the blown air while keeping the air volume of the fan 50 at a low level. Since it is possible to prevent the low-temperature blown air from being supplied to the target space at a large air volume, it is possible to avoid loss of user comfort.

In the third aspect, based on the first aspect or the second aspect, the control unit C increases the speed of the fan 50 when the detected temperature of the sensor 70 is higher than the second value and the speed of the fan 50 is lower than the target value, and the control unit C reduces the output of the heater 32 when the detected temperature of the sensor 70 is higher than the second value and the speed of the fan 50 is higher than the target value.

In the third aspect, when the temperature of the blown air is high and the rotation speed of the fan 50 is lower than the target value, the control unit C increases the rotation speed of the fan 50. This allows the temperature of the blown air to be quickly lowered while the rotation speed of the fan 50 approaches the target value.

When the temperature of the blown air is high and the rotation speed of the fan 50 is higher than the target value, the control unit C reduces the output of the heater 32. This can quickly reduce the temperature of the blown air.

In the fourth aspect, based on any one of the first to third aspects, the control unit C stops the fan 50 and the heater 32 when the detected temperature of the sensor 70 is higher than a third value, the output of the heater 32 is a lower limit value of the first range, and the rotation speed of the fan 50 is an upper limit value of the second range.

In the fourth aspect, in an abnormal state where the temperature of the blown air is high but cannot be lowered, the control unit C stops the fan 50 and the heater 32 .

According to a fifth aspect, based on any one of the first to fourth aspects, the control unit C controls the rotation speed of the fan 50 and the output of the heater 32 according to the temperature detected by the sensor 70 when the heating device starts to operate.

In the fifth aspect, when the heating device starts operating, the temperature of the blown air can be finely adjusted.

The sixth aspect is based on the fifth aspect and includes a radiation heater 31 that releases radiant heat to the front of the housing 11 .

The heater 32 that heats the air has a higher responsiveness to heating the air in the target space than the radiation heater 31 that releases radiant heat. In the sixth aspect of the invention, when the heating device starts operating, the control unit C controls the heater 32 instead of the radiation heater 31. Therefore, when the heating device starts operating, the temperature of the target space can be quickly brought close to the desired temperature.

According to a seventh aspect, in the sixth aspect, when the heating device (10) starts operating, the control unit (C) sets the output of the radiant heater (31) to a second output that is larger than the first output during a steady operation.

In the seventh aspect, since the output of the radiation heater 31 increases when the heating device starts operating, the temperature of the target space can be quickly raised.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic perspective view of a heating device according to an embodiment;

Fig. 2 is a cross-sectional view at right angles to the left-right direction of the heating device;

FIG3 is a block diagram of a control unit of a heating device;

4 is a table showing the target rotation speed of the fan, the output of the warm air heater, and the output of the radiation heater corresponding to the type of operation mode and the output of the heating device;

5 is a flowchart of initial control of the warm air mode and the warm air radiation mode;

6 is a flow chart of stable control of warm air mode and warm air radiation mode;

FIG. 7 is a flowchart of control of the radiation heater in the radiation mode and the warm air radiation mode according to the first modification.

Detailed ways

The following is a detailed description of the embodiments of the present disclosure with reference to the accompanying drawings. It should be noted that the present disclosure is not limited to the embodiments shown below, and various changes can be made without departing from the technical concept of the present disclosure. The drawings are used to briefly illustrate the present disclosure, so for easy understanding, the size, ratio or quantity may be exaggerated or simplified as needed.

(1) Overview of heating equipment

The heating device 10 according to the embodiment will be described with reference to Fig. 1 and Fig. 2. It should be noted that in the following description, "up", "down", "front", "rear", "right" and "left" refer in principle to the directions indicated by the arrows in Fig. 1. The hollow arrows in the figure indicate the direction of air flow.

The heating device 10 heats the indoor space S as the target space. The heating device 10 is a floor-standing heating device installed on the floor F of the indoor space S. The heating device 10 heats the indoor space S using radiant heat. In addition, the heating device 10 of this embodiment heats the indoor air in the indoor space S and supplies the heated air to the indoor space S.

The heating device 10 includes a housing 11 , a radiation heater 31 , a warm air heater 32 , a reflection plate 42 , a fan 50 , a front suction member 60 , and a rear suction member 61 .

(2) Specific conditions of the heating device

(2-1) Shell

The housing 11 is formed in a hollow substantially rectangular parallelepiped shape. The housing 11 is formed of, for example, a resin material. The housing 11 is formed in a box shape. The housing 11 has six surfaces. The six surfaces are composed of a front surface 12, a rear surface 13, an upper surface 14, a lower surface 15, a right surface 16, and a left surface 17.

The front surface 12 is located at the front side of the housing 11, the rear surface 13 is located at the rear side of the housing 11, the upper surface 14 is located at the upper side of the housing 11, the lower surface 15 is located at the lower side of the housing 11, the right surface 16 is located at the right side of the housing 11, and the left surface 17 is located at the left side of the housing 11. A support member 22 extending in the up-down direction is provided on the inner surface of the right surface 16 and the left surface 17. The support member 22 supports the radiation heater 31 and the reflection plate 42 in the housing 11.

As shown in Figs. 1 and 2, an inlet 20 and an outlet 21 are formed on the front surface 12 of the housing 11. The inlet 20 is an opening for inhaling air in the indoor space S. The outlet 21 is an opening for blowing the air in the housing 11 to the indoor space S. In the internal space I of the housing 11, an air passage P extending from the inlet 20 to the outlet 21 is formed.

The outlet 21 is located at the lower part of the casing 11. Specifically, the outlet 21 is located at the lower end of the casing 11. The outlet 21 is located near the floor F of the indoor space S. The outlet 21 extends from the right surface 16 to the left surface 17 of the casing 11 in the left-right direction.

The suction port 20 is located above the blowout port 21. The suction port 20 is formed from the upper end of the housing 11 to the vicinity of the blowout port 21. The suction port 20 is formed from the right surface 16 to the left surface 17 of the housing 11.

The housing 11 has a support plate 39 extending rearward from the lower end of the suction port 20. The support plate 39 extends from the left end to the right end of the internal space I. The support plate 39 partitions the first space 23 and the second space 25.

(2-2) Radiant Heater

The radiation heater 31 emits far infrared rays (heat rays). In the heating device 10 of the present embodiment, three radiation heaters 31 are provided. The number of the radiation heaters 31 is only an example, and may be one, two, or more than four. The radiation heater 31 is arranged in the internal space I and provides radiant heat. Specifically, each radiation heater 31 is fixed to the support member 22. The three radiation heaters 31 are arranged in front of the reflective plate 42. The radiation heater 31 has a far infrared coating containing ceramic.

Each radiation heater 31 is formed into a tubular shape or a rod-like shape extending in the left-right direction. The three radiation heaters 31 are arranged in the up-down direction along the front surface 12 and the rear surface 13 of the housing 11. The three radiation heaters 31 are arranged at equal intervals in a state of being parallel to each other. The heat rays emitted from the radiation heater 31 spread out in all directions with the axis of the radiation heater 31 as the center. The radiation heater 31 is arranged in the first space 23.

(2-3) Warm air heater

The warm air heater 32 heats the air flowing through the air passage P. The warm air heater 32 is an example of a heater disclosed in the present invention. The warm air heater 32 is, for example, an electric heater for heating air. The warm air heater 32 of the present embodiment is an immersion heater having a nichrome wire. The warm air heater 32 has an end cap 33 fixed to the right surface 16 of the housing 11, and a rod-shaped heater body 34 extending from the end cap 33 to the left surface 17 of the housing 11. By energizing the warm air heater 32, the heater body 34 generates heat. The air in the air passage P passing through the heater body 34 is heated by the heated heater body 34. The warm air heater 32 is arranged in the air passage P at a position downstream of the air flow relative to the radiation heater 31. Specifically, the warm air heater 32 is arranged in the second space 25 described later.

The responsiveness of the warm air heater 32 in contributing to heating the indoor space S is higher than the responsiveness of the radiation heater 31 in contributing to heating the indoor space S.

(2-4) Reflector

The reflecting plate 42 is arranged in the internal space I. The reflecting plate 42 reflects heat rays generated from the radiant heater 31 toward the front surface 12 of the housing 11 .

The reflecting plate 42 is arranged between the radiant heater 31 and the rear surface 13. The reflecting plate 42 faces the front surface 12 and the rear surface 13. The left and right ends of the reflecting plate 42 are fixed to the supporting member 22. The lower end of the reflecting plate 42 is fixed to the rear end of the supporting plate 39. A gap is formed between the upper end of the reflecting plate 42 and the upper surface 14. The gap is a connecting path 24.

The reflecting plate 42 includes three reflecting parts 42a that are approximately arc-shaped and two connecting parts 42b that connect them. The reflecting parts 42a extend in the left-right direction and have substantially the same cross-sectional shape in the left-right direction. Specifically, the reflecting parts 42a are formed in a curved surface shape that bulges backward. One reflecting part 42a is provided corresponding to each radiation heater 31. The reflecting part 42a is located at the rear side of the corresponding radiation heater 31 and is open toward the radiation heater 31. On the front surface of each reflecting part 42a, a reflecting surface R1 that reflects the heat rays of the corresponding radiation heater 31 forward is formed. The connecting part 42b is formed in a plate shape that extends in the left-right direction and is formed in connection with two reflecting parts 42a that are adjacent in the up-down direction.

(2-5) Fan

The fan 50 is arranged in the air passage P. The fan 50 conveys the air in the air passage P from the suction port 20 to the blow-out port 21. The fan 50 of the present embodiment is a cross-flow fan. As schematically shown in FIG. 1 , the fan 50 has a fan body 51 extending in the left-right direction and a fan motor 52 driving the fan body 51 to rotate. The fan 50 is arranged in the internal space I of the housing 11 at a position lower than the radiation heater 31. The fan 50 is arranged in the air passage P at a position closer to the downstream side of the air flow than the warm air heater 32. The fan 50 is arranged in the lower part of the internal space I of the housing 11. Specifically, the fan 50 is arranged near the blow-out port 21. The shortest distance from the fan 50 to the blow-out port 21 is shorter than the shortest distance from the fan 50 to the radiation heater 31. It should be noted that the fan 50 may also be arranged in the air passage P at a position closer to the upstream side of the air flow than the warm air heater 32.

(2-6) Front suction component and rear suction component

The front suction member 60 is formed in a flat plate shape. The front suction member 60 has a plurality of holes H. The front suction member 60 is formed of, for example, a punched plate. The front suction member 60 is formed of a metal material such as SUS. Heat rays from the radiation heater 31 toward the front surface 12 pass through the front suction member 60 .

The front suction component 60 is disposed at the suction port 20. Specifically, the front suction component 60 is disposed on the front surface 12 of the housing 11 in a manner covering the suction port 20. The front suction component 60 extends from the left end to the right end of the suction port 20 in the left-right direction. A plurality of holes H are formed on substantially the entire surface of the front suction component 60. Therefore, air in the indoor space S can be sucked from substantially the entire surface of the suction port 20. The front suction component 60 of this example may also be a mesh component.

The rear suction member 61 is formed in a flat plate shape. The rear suction member 61 has a plurality of holes H. The plurality of holes H are provided on the entire surface of the rear suction member 61. The rear suction member 61 is formed of a metal material such as SUS. The heat rays from the radiation heater 31 toward the front surface 12 pass through the rear suction member 61.

The rear suction component 61 is arranged opposite to the front suction component 60 so that the heat rays from the radiation heater 31 pass through the rear suction component 61 and the front suction component 60 in sequence. Specifically, the rear suction component 61 is arranged at a position that is more rearward than the front surface 12 of the shell 11 and more forward than the radiation heater 31. More specifically, the rear suction component 61 is arranged at a position that is closer to the front suction component 60 than the middle of the front suction component 60 and the radiation heater 31. The lower end of the rear suction component 61 is fixed to the support plate 39. The upper end of the rear suction component 61 is fixed to the upper surface 14.

The rear suction component 61 is fixed to the shell 11 in a state parallel to the front suction component 60. The rear suction component 61 is opposite to the front suction component 60. The rear suction component 61 is arranged in the first space 23 described later. The height position of the lower end of the rear suction component 61 is approximately the same as the height position of the lower end of the front suction component 60. The height position of the upper end of the rear suction component 61 is lower than the height position of the upper end of the rear suction component 61. The entire area of the rear suction component 61 overlaps with the front suction component 60 in the front-to-back direction. It should be noted that, in the present embodiment, the heating device 10 may also be a structure without the rear suction component 61.

(2-7) Air passage

The air passage P is provided in the internal space I of the housing 11. The air passage P connects the suction port 20 with the blowout port 21. The air passage P includes a first space 23 and a second space 25 arranged from upstream to downstream of the air flow. A communication path 24 is formed between the first space 23 and the second space 25.

The first space 23 is connected to the suction port 20 and includes a space in front of the reflector 42. Specifically, the first space 23 is formed between the front suction member 60 and the reflector 42. The first space 23 connects the suction port 20 with the upstream end of the communication path 24. The first space 23 constitutes a flow path for air to flow upward. Each radiant heater 31 faces the first space 23. The air flowing in the first space 23 is heated by the radiant heater 31.

The communication passage 24 is formed above the reflector 42. Specifically, the communication passage 24 is a gap space between the upper end of the reflector 42 and the upper surface 14 of the housing 11. In the communication passage 24, the air flow toward the upper side turns around to become the air flow toward the lower side. In this way, the first space 23 and the second space 25 are connected to each other above the reflector 42.

The second space 25 is connected to the blow-out port 21 and includes a space on the rear side of the reflecting plate 42. Specifically, the second space 25 has a space between the reflecting plate 42 and the rear surface 13 of the housing 11, and a space between the supporting plate 39 and the lower surface 15. A fan 50 is arranged in the second space 25. The fan 50 is arranged in the second space 25 at a position lower than the radiation heater 31. The second space 25 constitutes a flow path for air to flow from the top to the bottom. The fan 50 and the warm air heater 32 are arranged in the second space 25. The warm air heater 32 is arranged near the blow-out port 21 of the second space 25. Specifically, the warm air heater 32 is arranged at the lower part of the second space 25. The warm air heater 32 is arranged at a height position substantially the same as the blow-out port 21. In this way, the warm air heater 32 is arranged at a position closer to the downstream end than the upstream end of the second flow path, that is, closer to the blow-out port 21.

(2-8) Sensor

The heating device 10 has a blow-out temperature sensor 70. The blow-out temperature sensor 70 is one example of the sensor disclosed in the present invention. The blow-out temperature sensor 70 detects the temperature of the blow-out air blown out from the blow-out port 21. The blow-out temperature sensor 70 is arranged near the blow-out port 21. The blow-out temperature sensor 70 is arranged inside the housing 11. Specifically, the blow-out temperature sensor 70 is arranged between the blow-out port 21 and the fan 50. The distance between the blow-out temperature sensor 70 and the blow-out port 21 is shorter than the distance between the blow-out temperature sensor 70 and the fan 50. The blow-out temperature sensor 70 may also be arranged outside the housing 11 at a position where the blow-out air flows.

(2-9) Control Unit

As shown in FIG3 , the heating device 10 includes a control unit C. The control unit C includes an MCU (Micro Control Unit), an electrical circuit, and an electronic circuit. The MCU includes a CPU (Central Processing Unit), a memory, and a communication interface. The memory stores various programs for the CPU to execute.

The control unit C controls the fan 50, the radiation heater 31, and the warm air heater 32. The control unit C controls the on/off of the fan 50 and the rotation speed of the fan 50. Specifically, the control unit C controls the fan 50 so that the rotation speed of the fan 50 (strictly speaking, the fan motor 52) approaches the target value. The control unit C controls the on/off of the radiation heater 31 and the output of the radiation heater 31. The control unit C controls the on/off of the warm air heater 32 and the output of the warm air heater 32.

(3) Operation mode

As shown in FIG4 , the heating device 10 performs a plurality of operation modes. The plurality of operation modes include a radiation mode as a first mode, a warm air mode as a second mode, and a warm air radiation mode as a third mode. These operation modes are selected by a user operating an operation unit (not shown). The operation unit is composed of, for example, a switch, a remote controller, or a touch panel.

In each operation mode, the output of the heating device 10 can be changed. Specifically, in the heating device 10, three outputs of "weak", "medium" and "strong" can be changed. The heating capacity of the heating device 10 increases in the order of "weak", "medium" and "strong". These outputs of the heating device 10 are selected by the user operating the operation unit.

As shown in FIG. 4 , the control unit C changes the air volume of the fan 50 , the output of the warm air heater 32 , and the output of the radiation heater 31 according to the output of the heating device 10 .

The larger the output of the heating device 10 is, the larger the air volume of the fan 50 is controlled by the control unit C. The air volume of the fan 50 is equivalent to the target value of the rotation speed of the fan 50 (strictly speaking, the fan motor 52). Specifically, if the output of the heating device 10 is "weak", the control unit C sets the target value of the rotation speed of the fan 50 to "small", if the output of the heating device 10 is "medium", the control unit C sets the target value of the rotation speed of the fan 50 to "medium", and if the output of the heating device 10 is "strong", the control unit C sets the target value of the rotation speed of the fan 50 to "large". The rotation speed of the fan 50 increases in the order of "small", "medium", and "large".

The larger the output of the heating device 10 is, the larger the setting output of the warm air heater 32 is set by the control unit C. Specifically, if the output of the heating device 10 is "weak", the control unit C sets the output of the warm air heater 32 to "small", if the output of the heating device 10 is "medium", the control unit C sets the output of the warm air heater 32 to "medium", and if the output of the heating device 10 is "strong", the control unit C sets the output of the warm air heater 32 to "large". The output of the warm air heater 32 increases in the order of "small", "medium", and "large".

The larger the output of the heating device 10 is, the larger the setting output of the radiation heater 31 is set by the control unit C. Specifically, if the output of the heating device 10 is "weak", the control unit C sets the output of the radiation heater 31 to "small", if the output of the heating device 10 is "medium", the control unit C sets the output of the radiation heater 31 to "medium", and if the output of the heating device 10 is "strong", the control unit C sets the output of the radiation heater 31 to "large". The output of the radiation heater 31 increases in the order of "small", "medium", and "large".

(4) Operation

The operation operation in each operation mode is described.

(4-1) Radiation pattern

In the radiation mode, the control unit C turns off the warm air heater 32, turns on the radiation heater 31, and turns off the fan 50. It should be noted that in the radiation mode, the control unit C may also turn on the fan 50. In this case, the control unit C preferably sets the target rotation speed of the fan 50 to "low".

When the radiation heater 31 is in the energized state, heat rays are released from the radiation heater 31. A portion of the heat rays emitted from the radiation heater 31 directly advances forward. The remaining portion of the heat rays emitted from the radiation heater 31 is reflected by the reflective plate 42 and then indirectly advances forward. The heat rays advancing forward sequentially pass through the rear suction component 61 and the front suction component 60. The heat rays are released from the front suction component 60 to the indoor space S. In other words, radiant heat is released to the front side of the housing 11.

(4-2) Warm air mode

In the warm air mode, the control unit C turns on the warm air heater 32 , turns off the radiation heater 31 , and turns on the fan 50 .

When the fan 50 is running, the indoor air in the indoor space S is sucked into the suction port 20. The air flows into the second space 25 through the first space 23 and the connecting passage 24. Since the radiation heater 31 is not powered, the air in the air passage P is not heated in the first space 23.

When the warm air heater 32 is powered on, the heater body 34 generates heat. The air flowing downward in the second space 25 passes through the space behind the reflector 42 and is heated by the warm air heater 32. The air heated by the warm air heater 32 passes through the fan 50 and flows toward the blow-out port 21. The warm air is blown forward from the blow-out port 21.

(4-3) Warm air radiation mode

In the warm air radiation mode, the control unit C turns on the warm air heater 32 , turns on the radiation heater 31 , and turns on the fan 50 .

When the radiation heater 31 is powered on, heat rays are released from the radiation heater 31. A portion of the heat rays emitted from the radiation heater 31 directly advances forward. The remaining portion of the heat rays emitted from the radiation heater 31 is reflected by the reflective plate 42 and then indirectly advances forward. The heat rays that have advanced forward sequentially pass through the rear suction component 61 and the front suction component 60. Heat rays are released from the front suction component 60 to the indoor space S. In other words, radiant heat is released to the front side of the housing 11. The rear suction component 61 and the front suction component 60 absorb heat from the radiation heater 31.

When the fan 50 is operated, the indoor air in the indoor space S is sucked into the suction port 20. The air is heated in the first space 23 by the radiation heater 31 and the front and rear suction components 60 and 61 that have absorbed heat from the radiation heater 31, and then flows into the second space 25 through the communication path 24.

When the warm air heater 32 is powered on, the heater body 34 generates heat. The air in the second space 25 flows downward while being heated by the reflector 42 that has absorbed heat from the radiation heater 31. The air at the lower end of the rear space that has passed through the reflector 42 is further heated by the warm air heater 32. The air heated by the warm air heater 32 flows toward the blow-out port 21 after passing through the fan 50. The warm air is blown out from the blow-out port 21 to the indoor space S.

(5) Control actions of warm air mode and warm air radiation mode

In the warm air mode and the warm air radiation mode, the control unit C controls the rotation speed of the fan 50 (strictly speaking, the fan motor 52) and the output of the warm air heater 32 according to the temperature of the blown air. This makes it possible to finely adjust the temperature of the blown air blown out from the blowout port 21. This control operation will be described in detail with reference to FIGS. 5 and 6.

(5-1) Overview of control actions

When the heating device 10 executes the warm air mode or the warm air radiation mode, the control unit C performs initial control as the first control shown in Fig. 5. The initial control is a control for bringing the temperature of the blown air close to the target temperature while rapidly bringing the rotation speed of the fan 50 close to the target rotation speed.

Initial control is performed when the heating device 10 starts to operate and after the operating state of the heating device 10 is switched. "When the heating device 10 starts to operate" refers to the time just after the heating device 10 in the stopped state is operated. Therefore, when the heating device 10 starts to operate and executes the warm air mode and the warm air radiation mode, the control unit C performs initial control. "After switching the operating state of the heating device 10" means after the above-mentioned operating mode and the output of the heating device 10 are switched while the operation of the heating device 10 continues. Therefore, after the operating mode is switched to the warm air mode or the warm air radiation mode while the operation of the heating device 10 continues, the control unit C performs initial control. In addition, after the output of the heating device 10 is switched while the heating device 10 continues to execute the warm air mode or the warm air radiation mode, the control unit C also performs initial control.

When a predetermined condition is satisfied during the initial control, the control unit C performs a steady control as the second control shown in FIG. 6 .

(5-2) Specific circumstances of initial control

As shown in FIG5 , when the initial control starts, in step S11, the control unit C operates the fan 50 and the warm air heater 32. Here, the control unit C determines the target rotation speed of the fan 50 and the output of the warm air heater 32 according to the type of operation mode shown in FIG4 and the output of the heating device 10. It should be noted that in the initial control, the control unit C changes the rotation speed of the fan 50 in stages in units of a predetermined time so that it approaches the target value.

In step S12, when the temperature of the blown air (hereinafter also referred to as the blown air temperature) is not above the prescribed value, the process proceeds to step S13. The "prescribed value" referred to here is a set temperature set by the control unit C, for example, 40°C. The prescribed value corresponds to the first value and the second value of the present disclosure. For example, when the heating device 10 starts to operate, it takes time for the actual output of the warm air heater 32 to reach the target output. Therefore, sometimes the condition of step S12 is not met, and the process proceeds to step S13.

In step S13, when the rotation speed of the fan 50 is not above the target value, the processing proceeds to step S14. In step S14, when the output of the warm air heater 32 does not reach the upper limit of the specified range, the processing proceeds to step S15. The specified range referred to here is the control range of the output of the warm air heater 32. In step S15, the control unit C increases the output of the warm air heater 32. For example, when the heating device 10 starts to operate or when the operating state is switched, sometimes the blown-out temperature is lower than the set temperature and the rotation speed of the fan 50 is lower than the target value. In this case, the processing proceeds to step S12, step S13, step S14 and step S15 in sequence, and the output of the warm air heater 32 is increased. In this way, the blown-out temperature can be quickly increased.

In step S14 , when the output of the warm air heater 32 reaches the upper limit value, the process enters the stable control.

In step S13, when the rotation speed of the fan 50 is above the target value, the processing proceeds to step S16. In step S16, when the rotation speed of the fan 50 is not the target value, in other words, when the rotation speed of the fan 50 is higher than the target value, the processing proceeds to step S17. In step S17, the control unit C reduces the rotation speed of the fan 50. For example, after the output of the heating device 10 is switched to the decreasing direction, sometimes the blown-out temperature is lower than the set temperature and the rotation speed of the fan 50 is higher than the target value. In this case, the processing proceeds to step S12, step S13, step S16 and step S17 in sequence, and the rotation speed of the fan 50 is reduced. As a result, the rotation speed of the fan 50 can be brought close to the target value, and the temperature of the blown-out air can be quickly increased. As a result, it is possible to avoid supplying relatively low-temperature air to the indoor space S with a relatively large air volume, thereby suppressing the loss of user comfort.

In step S16 , when the rotation speed of the fan 50 is the target value, the process enters the steady control.

In step S12, when the blown-out temperature is above the prescribed value, the process proceeds to step S18. In step S18, when the rotation speed of the fan 50 is above the target value, the process proceeds to step S19. In step S19, the control unit C increases the rotation speed of the fan 50. For example, when switching the operating state of the heating device 10, sometimes the blown-out temperature is above the prescribed value and the rotation speed of the fan 50 is above the target value. In this case, the process proceeds to steps S12, S18, and S19, and the rotation speed of the fan 50 is reduced. In this way, the rotation speed of the fan 50 can be brought close to the target value and the blown-out temperature can be quickly reduced.

In step S18, when the rotation speed of the fan 50 is not equal to or higher than the target value, the process proceeds to step S20. In step S20, when the rotation speed of the fan 50 is equal to the target value, the process proceeds to the steady control.

In step S20, when the rotation speed of the fan 50 is not the target value, in other words, when the rotation speed of the fan 50 is lower than the target value, the process proceeds to step S21. In step S21, when the output of the warm air heater 32 does not reach the lower limit value, the process proceeds to step S22. In step S22, the control unit C reduces the output of the warm air heater 32. For example, when switching the operation of the heating device 10, sometimes the blown-out temperature is higher than the set temperature and the rotation speed of the fan 50 is lower than the target value. In this case, the process proceeds to step S12, step S18, step S20, step S21, and step S22 in sequence, and the output of the warm air heater 32 is reduced. This makes it possible to quickly reduce the blown-out temperature.

In step S21 , when the output of the warm air heater 32 reaches the lower limit value, the process enters the stable control.

(5-3) Specific situation of stability control

In FIG6 , in step S31 for performing stable control, when the blown-out temperature is higher than the upper limit value of the prescribed range, the processing proceeds to step S32. Here, the prescribed range is the range between the upper limit value obtained by adding the prescribed value to the set temperature (for example, 40° C.) and the lower limit value obtained by subtracting the prescribed value from the set temperature. The lower limit value is an example of the first value of the present disclosure, and the upper limit value is an example of the second value and the third value of the present disclosure. In step S32, when the rotation speed of the fan 50 is not above the target value, in other words, when the rotation speed of the fan 50 is lower than the target value, the processing proceeds to step S33. In step S33, the control unit C increases the rotation speed of the fan 50. Thereby, the rotation speed of the fan 50 can be close to the target value, and the blown-out temperature can be lower than the upper limit value.

In step S32, when the rotation speed of the fan 50 is above the target value, the process proceeds to step S34. In step S34, when the output of the warm air heater 32 does not reach the lower limit of the prescribed range, the process proceeds to step S35. Here, the prescribed range is an example of the first range of the present disclosure. The first range corresponds to the control range of the warm air heater 32, but may also correspond to a prescribed range smaller than the control range. In step S35, the control unit C reduces the output of the warm air heater 32. This enables the blown temperature to be lower than the upper limit.

In step S34, when the output of the warm air heater 32 reaches the lower limit, the process proceeds to step S36. In step S36, when the rotation speed of the fan 50 does not reach the upper limit of the prescribed range (first range), the process proceeds to step S37. In step S37, the control unit C increases the rotation speed of the fan 50. Thus, although the rotation speed of the fan 50 becomes higher than the target value, the blown temperature can be lowered below the upper limit.

In step S36, when the rotation speed of the fan 50 reaches the upper limit of the prescribed range, the processing proceeds to step S38. Here, the prescribed range is an example of the second range of the present disclosure. The second range corresponds to the control range of the rotation speed of the fan 50, but may also correspond to a prescribed range that is smaller than the control range. When the condition of step S36 is met, it is difficult to further reduce the blown temperature in the control of the warm air heater 32 and the fan 50. Therefore, in this case, the processing proceeds to step S38, and the control unit C stops the heating device 10. Specifically, in the case of the warm air mode, in step S38, the control unit C stops the fan 50 and the warm air heater 32. In the case of the warm air radiation mode, in step S38, the control unit C stops the fan 50, the warm air heater 32 and the radiation heater 31.

In step S31, when the blown temperature is not higher than the upper limit value, the process proceeds to step S39. In step S39, when the blown temperature is not lower than the lower limit value, in other words, when the blown temperature is within the prescribed range, the control unit C does not control the fan 50 and the warm air heater 32, and the process proceeds to step S40. In the case where the operation stop condition prescribed in step S40 is not satisfied, the process returns to step S31. When the operation stop condition prescribed in step S40 is satisfied, the control unit C terminates the operation of the heating device 10. The prescribed operation stop condition is, for example, inputting an operation end instruction to the control unit C by the user operating the operation unit.

In step S39, when the blown temperature is lower than the lower limit, the process proceeds to step S41. In step S41, when the rotation speed of the fan 50 is higher than the target value, the process proceeds to step S42. In step S42, the control unit C reduces the rotation speed of the fan 50. In this way, the rotation speed of the fan 50 can be brought close to the target value, and the blown temperature can be made higher than the lower limit.

In step S41, if the rotation speed of the fan 50 is not higher than the target value, the process proceeds to step S43. In step S43, if the output of the warm air heater 32 does not reach the upper limit of the prescribed range (first range), the process proceeds to step S44. In step S44, the control unit C increases the output of the warm air heater 32. This allows the blown temperature to be higher than the lower limit.

In step S43, when the output of the warm air heater 32 reaches the upper limit of the prescribed range (first range), the process proceeds to step S45. In step S45, when the rotation speed of the fan 50 does not reach the lower limit, the process proceeds to step S46. In step S46, the control unit C reduces the rotation speed of the fan 50. Thus, although the rotation speed of the fan 50 becomes lower than the target value, the blown temperature can be made higher than the lower limit.

In step S45, when the rotation speed of the fan 50 reaches the lower limit of the predetermined range (second range), the blown temperature cannot be further reduced under the control of the warm air heater 32 and the fan 50. Therefore, in this case, the process proceeds to step S40, and returns to step S31 if the operation stop condition is not satisfied.

(6) Features

(6-1)

The heating device 10 of this embodiment includes an outlet temperature sensor 70 for detecting the temperature of outlet air and a control unit C for controlling the rotation speed of the fan 50 and the output of the warm air heater 32 according to the temperature detected by the outlet temperature sensor 70 .

Therefore, in the warm air mode and the radiant warm air mode, the blown air temperature can be finely adjusted by controlling the rotation speed of the fan 50 and the output of the warm air heater 32. Therefore, the heating device 10 can quickly supply blown air of a desired temperature to the indoor space S, and can improve the comfort of the user.

(6-2)

In the present embodiment, the control unit C reduces the speed of the fan 50 when the temperature detected by the outlet temperature sensor 70 is lower than the first value and the speed of the fan 50 is higher than the target value (steps S17 and S42). Therefore, the temperature of the outlet air can be quickly increased while the speed of the fan 50 is brought close to the target value. Thus, the outlet air with a relatively low temperature can be prevented from blowing toward the user, thereby preventing the so-called cold wind from damaging the user's comfort.

In the present embodiment, the control unit C increases the output of the warm air heater 32 (steps S15 and S44) when the temperature detected by the outlet temperature sensor 70 is lower than the first value and the rotation speed of the fan 50 is lower than the target value. Therefore, the temperature of the outlet air can be quickly increased by increasing the output of the warm air heater 32. Since the rotation speed of the fan 50 is kept at a relatively low speed, the outlet air with a relatively low temperature can be prevented from being blown toward the user.

(6-3)

In the present embodiment, when the temperature detected by the outlet temperature sensor 70 is higher than the second value and the rotation speed of the fan 50 is lower than the target value, the control unit C increases the rotation speed of the fan 50 (steps S19 and S33). Therefore, the temperature of the outlet air can be quickly lowered while the rotation speed of the fan 50 is brought close to the target value.

In the present embodiment, the control unit C reduces the output of the warm air heater 32 (steps S22 and S35) when the temperature detected by the outlet temperature sensor 70 is higher than the second value and the rotation speed of the fan 50 is higher than the target value. Therefore, by reducing the output of the warm air heater 32, the temperature of the outlet air can be quickly lowered.

(6-4)

The control unit C of this embodiment stops the fan 50 and the warm air heater 32 when the temperature detected by the outlet temperature sensor 70 is higher than the third value, the output of the warm air heater 32 is the lower limit of the first range, and the rotation speed of the fan 50 is the upper limit of the second range (step S38). Thus, when the outlet temperature exceeds the third value (upper limit) but the abnormality of this situation cannot be eliminated by controlling the fan 50 and the warm air heater 32, the operation can be reliably avoided from continuing. As a result, the reliability of the heating device 10 can be improved.

(6-5)

The control unit C of this embodiment controls the rotation speed of the fan 50 and the output of the heater 32 according to the temperature detected by the outlet temperature sensor 70 when the heating device 10 starts operating (strictly speaking, in the warm air mode and the warm air radiation mode). Thus, when the heating device 10 starts operating, the outlet temperature can be finely adjusted.

(6-6)

The heating device 10 of this embodiment includes a radiation heater 31 that releases radiant heat to the front of the housing 11. In the above-mentioned stable control, the control unit C controls the rotation speed of the fan 50 and the output of the warm air heater 32, but does not control the output of the radiation heater 31. As described above, the responsiveness of the warm air heater 32 is higher than that of the radiation heater 31. Therefore, in the stable control, by controlling the output of the warm air heater 32, the temperature of the air in the indoor space S can be quickly brought close to the desired temperature.

(7) Modifications of the Embodiments

Regarding the above-mentioned embodiment, the structures of the modified examples described below may be adopted.

(7-1) First Modification

The control unit C of the first modification makes the output of the radiation heater 31 a second output greater than the first output during the steady operation when the heating device 10 starts operating. Here, the operation of the heating device 10 includes the warm air radiation mode and the radiation mode.

As shown in FIG. 7 , when the radiation mode and the warm air radiation mode start operation, in step S51, the control unit C causes the heating device 10 to perform initial operation. In the initial operation, in step S52, the control unit C causes the output of the radiation heater 31 to be the second output. The second output is a specified output greater than the first output of the radiation heater 31 in stable operation. The second output may also be the maximum output of the control range of the radiation heater 31. In this way, when the radiation mode and the warm air radiation mode start operation, the output of the radiation heater 31 will be relatively large. As a result, the amount of radiation heat released by the radiation heater 31 can be increased, so that the indoor space S can be quickly heated.

When the first condition specified in step S53 is satisfied, the control unit C causes the heating device 10 to perform steady operation in step S54. The first condition may be a) a specified time has passed since the heating device 10 started operating, or b) the air temperature around the radiation heater 31 exceeds a specified value. When the condition determination in b) is performed, the heating device 10 includes an air temperature sensor that detects the air temperature around the radiation heater 31.

In the stable operation, in step S55, the control unit C sets the output of the radiant heater 31 to the first output. As shown in FIG4 , the first output in this example is the set output of the radiant heater 31 corresponding to the operation mode and the output of the heating device 10. In step S56, when the predetermined operation stop condition is satisfied, the control unit C stops the operation of the heating device 10.

(8) Other Implementation Methods

The above-described embodiment and various modifications may also adopt the following structures.

In the initial control of the above embodiment, the first value and the second value of the present disclosure are the same value (set temperature). However, the first value and the second value may be different values.

The front suction member 60 or the rear suction member 61 may also be heat-resistant glass or a heat-resistant film.

The heating device 10 may not be a floor-standing heating device, but may be a wall-mounted or ceiling-mounted heating device.

The above embodiments and variations are described, but it should be understood that various changes can be made to the methods and specific circumstances without departing from the subject matter and scope of the claims. In addition, the above embodiments and variations can be appropriately combined or replaced as long as they do not affect the functions of the objects of the present disclosure. The terms "first", "second", "third", etc. mentioned above are only used to distinguish sentences containing the above terms, and are not intended to limit the number or order of the sentences.

- Industrial Applicability -

As described above, the present disclosure is useful for heating devices.

-Symbol Description-

10 Heating device

11 Housing

20 Inlet

31 Radiant Heater

32 Warm air heater (heater)

50 Fan

70 Blow-out temperature sensor (sensor)

C Control Unit

P Air passage

Claims (7)

1. A heating device, characterized in that: The heating device comprises a housing (11), a heater (32), a fan (50), a sensor (70) and a control unit (C). The housing (11) is formed with an inlet (20), an outlet (21), and an air passage (P) extending from the inlet (20) to the outlet (21). The heater (32) heats the air flowing through the air passage (P). The fan (50) is arranged in the air passage (P), The sensor (70) detects the temperature of the air blown out from the blowout port (21). The control unit (C) controls the rotation speed of the fan (50) and the output of the heater (32) according to the temperature detected by the sensor (70). 2. The heating device according to claim 1, characterized in that: The control unit (C) reduces the rotation speed of the fan (50) when the detected temperature of the sensor (70) is lower than a first value and the rotation speed of the fan (50) is higher than a target value, The control unit (C) increases the output of the heater (32) when the detected temperature of the sensor (70) is lower than the first value and the rotation speed of the fan (50) is lower than the target value. 3. The heating device according to claim 1 or 2, characterized in that: The control unit (C) increases the rotation speed of the fan (50) when the detected temperature of the sensor (70) is higher than a second value and the rotation speed of the fan (50) is lower than a target value, The control unit (C) reduces the output of the heater (32) when the detected temperature of the sensor (70) is higher than the second value and the rotation speed of the fan (50) is higher than the target value. 4. The heating device according to any one of claims 1 to 3, characterized in that: The control unit (C) stops the fan (50) and the heater (32) when the temperature detected by the sensor (70) is higher than a third value, the output of the heater (32) is a lower limit value of a first range, and the rotation speed of the fan (50) is an upper limit value of a second range. 5. The heating device according to any one of claims 1 to 4, characterized in that: The control unit (C) controls the rotation speed of the fan (50) and the output of the heater (32) according to the temperature detected by the sensor (70) when the heating device (10) starts to operate. 6. The heating device according to claim 5, characterized in that: The heating device includes a radiant heater (31) that releases radiant heat toward the front of the housing (11). 7. The heating device according to claim 6, characterized in that: The control unit (C) controls the output of the radiant heater (31) to a second output greater than the first output during steady operation when the heating device starts operating.