heating equipment

Abstract

To provide a heating apparatus capable of fine adjustment of the temperature of blown-out air.SOLUTION: A heating apparatus (10) comprises: a heater (32) for heating air that flows in an air passage (P); a fan (50) disposed in the air passage (P); a sensor (70) for detecting the temperature of blown-out air that is blown out of a blowout port (21); and a control unit (C) for controlling the output of the heater (32) and the rotation speed of the fan (50) on the basis of the temperature detected by the sensor (70).SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a heating device. [Background technology]

[0002] Patent Document 1 discloses a heating device. The heating device includes a casing with an air inlet and an air outlet, an electric heater for heating air, and a fan for transporting the air. When the air is heated by the electric heater, the heating device increases or decreases the airflow rate of the fan based on the value detected by a temperature sensor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-066552 Summary of the Invention [Problem to be solved by the invention]

[0004] As disclosed in Patent Document 1, even if the airflow rate of the fan is increased or decreased based on the detected value of the temperature sensor, it is difficult to finely adjust the temperature of the air blown out from the heating device to the target space.

[0005] An object of the present disclosure is to provide a heating device that can finely adjust the temperature of blown air. [Means for solving the problem]

[0006] A first aspect of the present disclosure is a casing (11) in which an air inlet (20), an air outlet (21), and an air passage (P) extending from the air inlet (20) to the air outlet (21) are formed; a heater (32) for heating the air flowing through the air passage (P); a fan (50) disposed in the air passage (P); The air is blown out from the air outlet (21).Heated by the heater (32) a sensor (70) for detecting the temperature of the blown air; The sensor (70) is the temperature of the blown air heated by the heater (32), detected by The heating device further includes a control unit (C) that controls the rotation speed of the fan (50) and the output of the heater (32) based on the detected temperature.

[0007] In the first mode, the control unit (C) controls the rotation speed of the fan (50) and the output of the heater (32) based on the temperature of the blown air detected by the sensor (70). Thus, by controlling the rotation speed of the fan (50) and the output of the heater (32), the temperature of the blown air can be precisely adjusted.

[0008] The second aspect is the first aspect, The control unit (C) 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 rotation speed of the fan (50) is reduced; When the temperature detected by the sensor (70) is lower than the first value and the rotation speed of the fan (50) is lower than the target value, the output of the heater (32) is increased.

[0009] In the second mode, when the temperature of the blown air is low and the rotation speed of the fan (50) is higher than a target value, the control unit (C) reduces the rotation speed of the fan (50). This makes it possible to quickly increase the temperature of the blown air while bringing the rotation speed of the fan (50) closer to the target value. This makes it possible to prevent low-temperature blown air from being supplied to the target space at a large volume, thereby preventing the user's comfort from being impaired.

[0010] When the temperature of the discharged air is low and the rotational speed of the fan (50) is lower than the target value, the control unit (C) increases the output of the heater (32). This allows the temperature of the discharged air to be quickly increased while keeping the airflow rate of the fan (50) low. This prevents a large amount of low-temperature discharged air from being supplied to the target space, thereby preventing a loss of comfort for the user.

[0011] The third aspect is the first or second aspect, The control unit (C) increasing 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; When the temperature detected by the sensor (70) is higher than the second value and the rotation speed of the fan (50) is higher than the target value, the output of the heater (32) is reduced.

[0012] 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 makes it possible to quickly reduce the temperature of the blown air while bringing the rotation speed of the fan (50) closer to the target value.

[0013] When the temperature of the blown air is high and the rotational speed of the fan (50) is higher than the target value, the control unit (C) reduces the output of the heater (32), thereby enabling the temperature of the blown air to be quickly reduced.

[0014] The fourth aspect is any one of the first to third aspects, 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 at the lower limit of a first range, and the rotation speed of the fan (50) is at the upper limit of a second range.

[0015] In the fourth mode, in an abnormal state in which the temperature of the blown air is high but cannot be reduced, the control section (C) stops the fan (50) and the heater (32).

[0016] The fifth aspect is any one of the first to fourth aspects, When the heating device starts operating, the control unit (C) controls the rotation speed of the fan (50) and the output of the heater (32) based on the temperature detected by the sensor (70).

[0017] In the fifth aspect, the temperature of the blown air can be finely adjusted when the heating device starts operating. 。 [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic perspective view of a heating device according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the heating device taken at a right angle to the left-right direction. [Figure 3] FIG. 3 is a block diagram of the control unit of the heating device. [Figure 4] FIG. 4 is a table showing the target rotation speed of the fan, the output of the hot air heater, and the output of the radiant heater according to the type of operation mode and the output of the heating device. [Figure 5] FIG. 5 is a flowchart relating to the initial control of the hot air mode and the hot air radiation mode. [Figure 6] FIG. 6 is a flowchart relating to the steady-state control in the hot air mode and the hot air radiation mode. [Figure 7] FIG. 7 is a flowchart relating to the control of the radiant heater in the radiation mode and the hot air radiation mode according to the first modification. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible within the scope of the technical concept of the present disclosure. Since the drawings are intended to conceptually explain the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary to facilitate understanding.

[0020] (1) Overview of the heating system A heating device (10) according to an embodiment will be described with reference to Figures 1 and 2. In the following description, "upper," "lower," "front," "rear," "right," and "left" generally refer to the directions indicated by the arrows in Figure 1. The outline arrows in the drawings indicate the direction of air flow.

[0021] The heating device (10) heats an indoor space (S), which is a target space. The heating device (10) is a floor-standing type that is installed on the floor surface (F) of the indoor space (S). The heating device (10) heats the indoor space (S) by radiant heat. In addition, the heating device (10) of this embodiment heats indoor air in the indoor space (S) and supplies the heated air to the indoor space (S).

[0022] The heating device (10) includes a casing (11), a radiant heater (31), a hot air heater (32), a reflector (42), a fan (50), a front suction member (60), and a rear suction member (61).

[0023] (2) Details of the heating system (2-1) Casing The casing (11) is formed in a hollow, substantially rectangular parallelepiped shape. The casing (11) is made of, for example, a resin material. The casing (11) is formed in a box shape. The casing (11) has six surfaces. The six surfaces are a front surface (12), a rear surface (13), a top surface (14), a bottom surface (15), a right surface (16), and a left surface (17).

[0024] The front surface (12) is located on the front side of the casing (11), the rear surface (13) is located on the rear side of the casing (11), the top surface (14) is located on the top side of the casing (11), the bottom surface (15) is located on the bottom side of the casing (11), the right surface (16) is located on the right side of the casing (11), and the left surface (17) is located on the left side of the casing (11). Support members (22) extending in the vertical direction are provided on the inner surfaces of the right surface (16) and the left surface (17). The support members (22) support the radiant heater (31) and the reflector (42) within the casing (11).

[0025] As shown in Figures 1 and 2, an inlet (20) and an outlet (21) are formed in the front surface (12) of the casing (11). The inlet (20) is an opening for drawing in air from the indoor space (S). The outlet (21) is an opening for blowing air from inside the casing (11) into the indoor space (S). An air passage (P) is formed in the internal space (I) of the casing (11) between the inlet (20) and the outlet (21).

[0026] The air outlet (21) is located in the lower part of the casing (11). Specifically, the air outlet (21) is located at the lower end of the casing (11). The air outlet (21) is located near the floor surface (F) of the indoor space (S). The air outlet (21) extends laterally from the right surface (16) to the left surface (17) of the casing (11).

[0027] The suction port (20) is located above the outlet (21). The suction port (20) is formed from the upper end of the casing (11) to the vicinity of the outlet (21). The suction port (20) is formed from the right surface (16) to the left surface (17) of the casing (11).

[0028] The casing (11) has a support plate (39) extending rearward from the lower end of the suction port (20). The support plate (39) extends across the left and right ends of the internal space (I). The support plate (39) separates the first space (23) from the second space (25).

[0029] (2-2) Radiant heater The radiant heaters (31) emit far-infrared rays (heat rays). In the heating device (10) of this embodiment, three radiant heaters (31) are provided. The number of radiant heaters (31) is merely an example, and the number may be one, two, four or more. The radiant heaters (31) are disposed in the interior space (I) and provide radiant heat. Specifically, each radiant heater (31) is fixed to a support member (22). The three radiant heaters (31) are disposed in front of a reflector (42). The radiant heaters (31) are coated with far-infrared rays containing ceramic.

[0030] Each radiant heater (31) is formed in the shape of a pipe extending in the left-right direction or in a generally rod-like shape. The three radiant heaters (31) are arranged in the vertical direction along the front surface (12) and rear surface (13) of the casing (11). The three radiant heaters (31) are arranged parallel to one another and at equal intervals. Heat rays emitted from the radiant heaters (31) spread all around the axis of the radiant heaters (31). The radiant heaters (31) are arranged in the first space (23).

[0031] (2-3) Hot air heater The hot air heater (32) heats the air flowing through the air passage (P). The hot air heater (32) is an example of a heater in the present disclosure. The hot air heater (32) is, for example, an electric heater for heating air. The hot air heater (32) of this embodiment is a plug heater having a nichrome wire. The hot air heater (32) has a terminal cap (33) fixed to the right surface (16) of the casing (11) and a rod-shaped heater body (34) extending from the terminal cap (33) toward the left surface (17) of the casing (11). When electricity is applied to the hot air heater (32), the heater body (34) generates heat. The heated heater body (34 heats the air in the air passage (P) passing through the heater body (34). The hot air heater (32) is arranged in the air passage (P) downstream of the air flow from the radiant heater (31). Specifically, the hot air heater (32) is arranged in a second space (25) described later.

[0032] The response of the hot air heater (32) to the heating of the room space (S) is higher than the response of the radiant heater (31) to the heating of the room space (S).

[0033] (2-4)Reflector The reflector (42) is disposed in the interior space (I). The reflector (42) reflects heat rays generated from the radiant heater (31) toward the front surface (12) of the casing (11).

[0034] The reflector (42) is disposed between the radiant heater (31) and the rear surface (13). The reflector (42) faces the front surface (12) and the rear surface (13). The left and right ends of the reflector (42) are fixed to the support member (22). The lower end of the reflector (42) is fixed to the rear end of the support plate (39). A gap is formed between the upper end of the reflector (42) and the upper surface (14). This gap is the communication passage (24).

[0035] The reflecting plate (42) includes three substantially arc-shaped reflecting portions (42a) and two connecting portions (42b) connecting the reflecting portions (42a). The reflecting portions (42a) extend in the left-right direction and have substantially the same cross-sectional shape in the left-right direction. Specifically, the reflecting portions (42a) are formed in a curved surface shape that bulges rearward. One reflecting portion (42a) is provided corresponding to each radiant heater (31). The reflecting portion (42a) is located behind the corresponding radiant heater (31) and opens toward the corresponding radiant heater (31). A reflecting surface (R1) that reflects heat rays from the corresponding radiant heater (31) forward is formed on the front surface of each reflecting portion (42a). The connecting portions (42b) are formed in a plate shape extending in the left-right direction and are continuous with two vertically adjacent reflecting portions (42a).

[0036] (2-5) Fans The fan (50) is disposed in the air passage (P). The fan (50) transports air in the air passage (P) from the inlet (20) toward the outlet (21). The fan (50) of this embodiment is a cross-flow fan. As shown schematically in FIG. 1 , the fan (50) has a fan body (51) extending in the left-right direction and a fan motor (52) that drives and rotates the fan body (51). The fan (50) is disposed below the radiant heater (31) in the internal space (I) of the casing (11). The fan (50) is disposed downstream of the hot air heater (32) in the air passage (P) in the air flow direction. The fan (50) is disposed in the lower part of the internal space (I) of the casing (11). Specifically, the fan (50) is disposed near the outlet (21). The shortest distance from the fan (50) to the air outlet (21) is shorter than the shortest distance from the fan (50) to the radiant heater (31). The fan (50) may be located upstream of the hot air heater (32) in the air path (P).

[0037] (2-6) Front suction member and rear suction member 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 made of, for example, a punched plate. The front suction member (60) is made of a metal material such as stainless steel. Heat rays from the radiant heater (31) directed toward the front surface (12) pass through the front suction member (60).

[0038] The front suction member (60) is provided at the suction port (20). Specifically, the front suction member (60) is provided at the front surface (12) of the casing (11) so as to cover the suction port (20). The front suction member (60) extends in the left-right direction from the left end to the right end of the suction port (20). The holes (H) are formed over substantially the entire surface of the front suction member (60). Therefore, air from the indoor space (S) can be drawn in from substantially the entire surface of the suction port (20). The front suction member (60) in this example may be a mesh member.

[0039] 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 made of a metal material such as stainless steel. Heat rays from the radiant heater (31) directed toward the front surface (12) pass through the rear suction member (61).

[0040] The rear suction member (61) is disposed facing the front suction member (60) so that heat rays from the radiant heater (31) pass through the rear suction member (61) and then the front suction member (60). Specifically, the rear suction member (61) is disposed rearward of the front surface (12) of the casing (11) and forward of the radiant heater (31). More specifically, the rear suction member (61) is disposed closer to the front suction member (60) than the midpoint between the front suction member (60) and the radiant heater (31). The lower end of the rear suction member (61) is fixed to the support plate (39). The upper end of the rear suction member (61) is fixed to the upper surface (14).

[0041] The rear suction member (61) is fixed to the casing (11) in a state parallel to the front suction member (60). The rear suction member (61) faces the front suction member (60). The rear suction member (61) is disposed in a first space (23) described below. The height position of the lower end of the rear suction member (61) is approximately equal to the height position of the lower end of the front suction member (60). The height position of the upper end of the rear suction member (61) is lower than the height position of the upper end of the rear suction member (61). The entire rear suction member (61) overlaps with the front suction member (60) in the front-to-rear direction. Note that in this embodiment, the heating device (10) may be configured without the rear suction member (61).

[0042] (2-7) Air passage The air passage (P) is provided in the internal space (I) of the casing (11). The air passage (P) connects the inlet (20) and the outlet (21). The air passage (P) includes a first space (23) and a second space (25) arranged side by side from upstream to downstream in the air flow. A communication passage (24) is formed between the first space (23) and the second space (25).

[0043] The first space (23) communicates with 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) communicates between the suction port (20) and the upstream end of the communication passage (24). The first space (23) forms a flow path through which air flows upward. Each radiant heater (31) faces the first space (23). The air flowing through the first space (23) is heated by the radiant heater (31).

[0044] 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 casing (11). In the communication passage (24), the upward airflow makes a U-turn and becomes a downward airflow. In this way, the first space (23) and the second space (25) communicate with each other above the reflector (42).

[0045] The second space (25) communicates with the air outlet (21) and includes a space behind the reflector (42). Specifically, the second space (25) includes a space between the reflector (42) and the rear surface (13) of the casing (11) and a space between the support plate (39) and the lower surface (15). A fan (50) is disposed in the second space (25). The fan (50) is disposed below the radiant heater (31) in the second space (25). The second space (25) defines a flow path through which air flows from above to below. The fan (50) and a hot air heater (32) are disposed in the second space (25). The hot air heater (32) is disposed near the air outlet (21) in the second space (25). Specifically, the hot air heater (32) is disposed in the lower part of the second space (25). The hot air heater (32) is disposed at approximately the same height as the air outlet (21). In this manner, the hot air heater (32) is disposed closer to the air outlet (21), which is the downstream end of the second flow path, than to the upstream end of the second flow path.

[0046] (2-8) Sensor The heating device (10) has a discharge temperature sensor (70). The discharge temperature sensor (70) is an example of a sensor of the present disclosure. The discharge temperature sensor (70) detects the temperature of the air discharged from the air outlet (21). The discharge temperature sensor (70) is disposed near the air outlet (21). The discharge temperature sensor (70) is disposed inside the casing (11). Specifically, the discharge temperature sensor (70) is disposed between the air outlet (21) and the fan (50). The distance between the discharge temperature sensor (70) and the air outlet (21) is shorter than the distance between the discharge temperature sensor (70) and the fan (50). The discharge temperature sensor (70) may be disposed outside the casing (11) at a position where the air flows.

[0047] (2-9) Control unit As shown in Fig. 3, the heating device (10) includes a control unit (C). The control unit (C) includes an MCU (Micro Control Unit), an electric circuit, and an electronic circuit. The MCU includes a CPU (Central Processing Unit), a memory, and a communication interface. The memory stores various programs to be executed by the CPU.

[0048] The control unit (C) controls the fan (50), the radiant heater (31), and the hot 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 a target value. The control unit (C) controls the ON / OFF of the radiant heater (31) and the output of the radiant heater (31). The control unit (C) controls the ON / OFF of the hot air heater (32) and the output of the hot air heater (32).

[0049] (3) Operation mode As shown in Fig. 4, the heating device (10) operates in a plurality of operation modes. The plurality of operation modes include a radiation mode as a first mode, a hot air mode as a second mode, and a hot air radiation mode as a third mode. The user selects one of these operation modes by operating an operation unit (not shown). The operation unit is configured by, for example, a switch, a remote control, or a touch panel.

[0050] In each operation mode, the output of the heating device (10) can be changed. Specifically, the heating device (10) can change three outputs: "weak," "medium," and "high." The heating capacity of the heating device (10) increases in the order of "weak," "medium," and "high." The user selects these outputs of the heating device (10) by operating an operation unit.

[0051] As shown in FIG. 4, the control unit (C) changes the airflow rate of the fan (50), the output of the hot air heater (32), and the output of the radiant heater (31) depending on the output of the heating device (10).

[0052] The control unit (C) increases the airflow rate of the fan (50) as the output of the heating device (10) increases. The airflow rate of the fan (50) corresponds 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 "low," the control unit (C) sets the target value of the rotation speed of the fan (50) to "low," 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 "high," the control unit (C) sets the target value of the rotation speed of the fan (50) to "high." The rotation speed of the fan (50) increases in the order of "low," "medium," and "high."

[0053] The control unit (C) increases the set output of the hot air heater (32) as the output of the heating device (10) increases. Specifically, the control unit (C) sets the output of the hot air heater (32) to "small" if the output of the heating device (10) is "low," sets the output of the hot air heater (32) to "medium" if the output of the heating device (10) is "medium," and sets the output of the hot air heater (32) to "high" if the output of the heating device (10) is "high." The output of the hot air heater (32) increases in the order of "small," "medium," and "high."

[0054] The control unit (C) increases the set output of the radiant heater (31) as the output of the heating device (10) increases. Specifically, the control unit (C) sets the output of the radiant heater (31) to "small" if the output of the heating device (10) is "low," sets the output of the radiant heater (31) to "medium" if the output of the heating device (10) is "medium," and sets the output of the radiant heater (31) to "high" if the output of the heating device (10) is "high." The output of the radiant heater (31) increases in the order of "small," "medium," and "high."

[0055] (4) Driving behavior The operation of each operation mode will be described below.

[0056] (4-1) Radiation mode In the radiation mode, the control unit (C) turns off the hot air heater (32), turns on the radiation heater (31), and turns off the fan (50). Note that in the radiation mode, the control unit (C) may turn on the fan (50). In this case, it is preferable that the control unit (C) set the target rotation speed of the fan (50) to "low."

[0057] When the radiant heater (31) is energized, heat rays are emitted from the radiant heater (31). A portion of the heat rays emitted from the radiant heater (31) travels directly forward. The remainder of the heat rays emitted from the radiant heater (31) travels indirectly forward after being reflected by the reflector (42). The heat rays traveling forward pass through the rear suction member (61) and the front suction member (60) in this order. The heat rays are emitted from the front suction member (60) into the indoor space (S). In other words, radiant heat is emitted toward the front side of the casing (11).

[0058] (4-2) Warm air mode In the hot air mode, the control unit (C) turns on the hot air heater (32), turns off the radiant heater (31), and turns on the fan (50).

[0059] When the fan (50) is operated, room air in the room space (S) is sucked into the air inlet (20). This air flows into the second space (25) through the first space (23) and the communication passage (24). Because the radiant heater (31) is not energized, the air in the air passage (P) is not heated in the first space (23).

[0060] When the hot air heater (32) is energized, the heater body (34) generates heat. Air flowing downward through the second space (25) passes through the rear surface of the reflector (42) and is then heated by the hot air heater (32). The air heated by the hot air heater (32) passes through the fan (50) and then flows toward the outlet (21). Hot air is blown forward from the outlet (21).

[0061] (4-3) Warm air radiation mode In the hot air radiation mode, the control section (C) turns on the hot air heater (32), turns on the radiation heater (31), and turns on the fan (50).

[0062] When the radiant heater (31) is energized, heat rays are emitted from the radiant heater (31). A portion of the heat rays emitted from the radiant heater (31) travels directly forward. The remainder of the heat rays emitted from the radiant heater (31) travels indirectly forward after being reflected by the reflector (42). The heat rays traveling forward pass through the rear suction member (61) and the front suction member (60) in this order. The heat rays are emitted from the front suction member (60) into the indoor space (S). In other words, radiant heat is emitted to the front side of the casing (11). The rear suction member (61) and the front suction member (60) absorb the heat from the radiant heater (31).

[0063] When the fan (50) is operated, room air in the room space (S) is sucked into the air inlet (20). This air is heated in the first space (23) by the radiant heater (31) and the front and rear suction members (60 and 61) that have absorbed heat from the radiant heater (31), and then flows into the second space (25) through the communication passage (24).

[0064] When the hot air heater (32) is energized, the heater body (34) generates heat. The air in the second space (25) flows downward while being heated by the reflector (42) which absorbs heat from the radiant heater (31). The air that passes through the lower end of the rear surface of the reflector (42) is further heated by passing through the hot air heater (32). The air heated by the hot air heater (32) passes through the fan (50) and then flows toward the air outlet (21). Hot air is blown out from the air outlet (21) toward the indoor space (S).

[0065] (5) Control operation of hot air mode and hot air radiation mode In the above-described hot air mode and hot 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 hot air heater (32) based on the temperature of the blown air. This makes it possible to precisely adjust the temperature of the air blown out from the outlet (21). This control operation will be described in detail with reference to FIGS. 5 and 6.

[0066] (5-1) Overview of control operation When the heating device (10) is set to the hot air mode or the hot 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 quickly bringing the rotation speed of the fan (50) close to the target rotation speed and bringing the temperature of the blown air close to the target temperature.

[0067] The initial control is performed when the heating device (10) starts operating or after the operating state of the heating device (10) is switched. "When the heating device (10) starts operating" refers to the time immediately after the heating device (10) is operated from a stopped state. Therefore, when the heating device (10) starts operating and the hot air mode or the hot air radiation mode is executed, the control unit (C) performs the initial control. "After the operating state of the heating device (10) is switched" refers to the time after the above-mentioned operating mode or the output of the heating device (10) is switched while the heating device (10) continues operating. Therefore, the control unit (C) performs the initial control after the operating mode is switched to the hot air mode or the hot air radiation mode while the heating device (10) continues operating. In addition, the control unit (C) also performs the initial control after the output of the heating device (10) is switched while the heating device (10) continues operating in the hot air mode or the hot air radiation mode.

[0068] When a predetermined condition is met in the initial control, the control section (C) performs the steady-state control as the second control shown in FIG.

[0069] (5-2) Details of initial control As shown in Fig. 5, when the initial control is started, in step S11, the control unit (C) operates the fan (50) and the hot air heater (32). Here, the control unit (C) determines the target rotation speed of the fan (50) and the output of the hot air heater (32) according to the type of operation mode shown in Fig. 4 and the output of the heating device (10). During the initial control, the control unit (C) gradually changes the rotation speed of the fan (50) at predetermined time intervals so as to approach the target value.

[0070] In step S12, if the temperature of the blown air (hereinafter also referred to as blown temperature) is not equal to or higher than a predetermined value, the process proceeds to step S13. The "predetermined value" here is a set temperature set in the control unit (C), for example, 40°C. This predetermined value corresponds to the first and second values ​​in the present disclosure. For example, when the heating device (10) starts operating, it takes time for the actual output of the hot air heater (32) to reach the target output. Therefore, the condition in step S12 may not be met, and the process may proceed to step S13.

[0071] If it is determined in step S13 that the rotation speed of the fan (50) is not equal to or greater than the target value, the process proceeds to step S14. If it is determined in step S14 that the output of the hot air heater (32) has not reached the upper limit of its predetermined range, the process proceeds to step S15. The predetermined range here refers to the control range of the output of the hot air heater (32). In step S15, the control unit (C) increases the output of the hot air heater (32). For example, when the heating device (10) starts operating or when the operating state is switched, the blown air temperature may be lower than the set temperature and the rotation speed of the fan (50) may be lower than the target value. In such a case, the process proceeds in the order of steps S12, S13, S14, and S15, and the output of the hot air heater (32) is increased. This allows the blown air temperature to be quickly increased.

[0072] In step S14, if the output of the hot air heater (32) has reached the upper limit, the process proceeds to steady-state control.

[0073] If the rotation speed of the fan (50) is equal to or greater than the target value in step S13, the process proceeds to step S16. If the rotation speed of the fan (50) is not equal to the target value in step S16, in other words, if the rotation speed of the fan (50) is higher than the target value, the process 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 a decreasing direction, the discharge temperature may be lower than the set temperature and the rotation speed of the fan (50) may be higher than the target value. In such a case, the process proceeds in the order of steps S12, S13, S16, and S17, and the rotation speed of the fan (50) is reduced. This allows the rotation speed of the fan (50) to approach the target value and quickly increase the temperature of the discharged air. As a result, it is possible to prevent a relatively low-temperature air from being supplied to the indoor space (S) at a relatively large volume, thereby suppressing a loss of user comfort.

[0074] In step S16, if the rotation speed of the fan (50) is equal to the target value, the process proceeds to steady-state control.

[0075] If the blow-out temperature is equal to or higher than the predetermined value in step S12, the process proceeds to step S18. If the rotation speed of the fan (50) is equal to or higher than the target value in step S18, 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 operation state of the heating device (10), the blow-out temperature may be equal to or higher than the predetermined value and the rotation speed of the fan (50) may be equal to or higher than the target value. In such a case, the process proceeds to steps S12, S18, and S19, and the rotation speed of the fan (50) is reduced. This allows the rotation speed of the fan (50) to approach the target value and quickly lower the blow-out temperature.

[0076] If it is determined in step S18 that the rotation speed of the fan (50) is not equal to or greater than the target value, the process proceeds to step S20. If it is determined in step S20 that the rotation speed of the fan (50) is equal to the target value, the process proceeds to steady-state control.

[0077] In step S20, if the rotation speed of the fan (50) is not the target value, in other words, if the rotation speed of the fan (50) is lower than the target value, the process proceeds to step S21. In step S21, if the output of the hot air heater (32) has not reached the lower limit, the process proceeds to step S22. In step S22, the control unit (C) reduces the output of the hot air heater (32). For example, when switching the operation of the heating device (10), the blown air temperature may be higher than the set temperature and the rotation speed of the fan (50) may be lower than the target value. In such a case, the process proceeds in the order of steps S12, S18, S20, S21, and S22, and the output of the hot air heater (32) is reduced. This allows the blown air temperature to be quickly reduced.

[0078] In step S21, if the output of the hot air heater (32) has reached the lower limit, the process proceeds to steady-state control.

[0079] (5-3) Details of steady-state control In step S31 of the steady-state control in FIG. 6, if the blown air temperature is higher than the upper limit of a predetermined range, the process proceeds to step S32. Here, the predetermined range is a range between an upper limit obtained by adding a predetermined value to a set temperature (e.g., 40°C) and a lower limit obtained by subtracting the predetermined value from the set temperature. This lower limit is an example of a first value in the present disclosure, and this upper limit is an example of a second value and a third value in the present disclosure. In step S32, if the rotation speed of the fan (50) is not equal to or higher than the target value, in other words, if the rotation speed of the fan (50) is lower than the target value, the process proceeds to step S33. In step S33, the control unit (C) increases the rotation speed of the fan (50). This makes it possible to bring the rotation speed of the fan (50) closer to the target value and to lower the blown air temperature below the upper limit.

[0080] In step S32, if the rotation speed of the fan (50) is equal to or greater than the target value, the process proceeds to step S34. In step S34, if the output of the hot air heater (32) has not reached the lower limit of the predetermined range, the process proceeds to step S35. Here, this predetermined range is an example of the first range of the present disclosure. The first range corresponds to the control range of the hot air heater (32), but may correspond to a predetermined range narrower than the control range. In step S35, the control unit (C) reduces the output of the hot air heater (32). This makes it possible to lower the blown air temperature below the upper limit.

[0081] If the output of the hot air heater (32) has reached the lower limit in step S34, the process proceeds to step S36. If the rotation speed of the fan (50) has not reached the upper limit of the predetermined range (first range) in step S36, the process proceeds to step S37. In step S37, the control unit (C) increases the rotation speed of the fan (50). As a result, the rotation speed of the fan (50) becomes higher than the target value, but the blown air temperature can be made lower than the upper limit.

[0082] If, in step S36, the rotation speed of the fan (50) has reached the upper limit of the predetermined range, the process proceeds to step S38. Here, this predetermined 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 correspond to a predetermined range narrower than the control range. If the condition of step S36 is met, it is difficult to further reduce the blown air temperature by controlling the hot air heater (32) and the fan (50). Therefore, in this case, the process proceeds to step S38, and the control unit (C) stops the heating device (10). Specifically, in the hot air mode, the control unit (C) stops the fan (50) and the hot air heater (32) in step S38. In the hot air radiation mode, the control unit (C) stops the fan (50), the hot air heater (32), and the radiation heater (31) in step S38.

[0083] If the blowing temperature is not higher than the upper limit in step S31, the process proceeds to step S39. If the blowing temperature is not lower than the lower limit in step S39, in other words, if the blowing temperature is within a predetermined range, the control unit (C) does not control the fan (50) and the hot air heater (32), and the process proceeds to step S40. If the predetermined operation stop condition is not satisfied in step S40, the process returns to step S31. If the predetermined operation stop condition is satisfied in step S40, the control unit (C) terminates the operation of the heating device (10). The predetermined operation stop condition is, for example, a command to terminate operation input to the control unit (C) by a user operating the operation unit.

[0084] If the blow-out temperature is lower than the lower limit in step S39, the process proceeds to step S41. If the rotation speed of the fan (50) is higher than the target value in step S41, the process proceeds to step S42. In step S42, the control unit (C) reduces the rotation speed of the fan (50). This allows the rotation speed of the fan (50) to approach the target value and the blow-out temperature to be higher than the lower limit.

[0085] 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 hot air heater (32) has not reached the upper limit of a predetermined range (first range), the process proceeds to step S44. In step S44, the control unit (C) increases the output of the hot air heater (32). This makes it possible to raise the blown air temperature above the lower limit.

[0086] In step S43, if the output of the hot air heater (32) has reached the upper limit of the predetermined range (first range), the process proceeds to step S45. In step S45, if the rotation speed of the fan (50) has not reached the lower limit, the process proceeds to step S46. In step S46, the control unit (C) reduces the rotation speed of the fan (50). As a result, the rotation speed of the fan (50) becomes lower than the target value, but the blown air temperature can be made higher than the lower limit.

[0087] In step S45, if the rotation speed of the fan (50) has reached the lower limit of the predetermined range (second range), the blowing temperature cannot be further reduced by controlling the hot air heater (32) and the fan (50). Therefore, in this case, the process proceeds to step S40, and if the operation stop condition is not satisfied, the process returns to step S31.

[0088] (6) Features (6-1) The heating device (10) of this embodiment includes a blowout temperature sensor (70) that detects the temperature of the blown air, and a control unit (C) that controls the rotation speed of the fan (50) and the output of the hot air heater (32) based on the temperature detected by the blowout temperature sensor (70).

[0089] Therefore, in the hot air mode or the radiant hot air mode, the blown air temperature can be precisely adjusted by controlling the rotation speed of the fan (50) and the output of the hot air heater (32). Thus, the heating device (10) can quickly supply blown air at a desired temperature to the room space (S), thereby improving the comfort of the user.

[0090] (6-2) In this embodiment, the control unit (C) reduces the rotation speed of the fan (50) when the temperature detected by the discharge temperature sensor (70) is lower than the first value and the rotation speed of the fan (50) is higher than the target value (steps S17 and S42). This allows the rotation speed of the fan (50) to approach the target value, while quickly increasing the temperature of the discharged air. This prevents the user from being exposed to relatively low-temperature discharged air, thereby preventing a so-called cold draft from damaging the user's comfort.

[0091] In this embodiment, the control unit (C) increases the output of the hot air heater (32) when the temperature detected by the discharge temperature sensor (70) is lower than the first value and the rotation speed of the fan (50) is lower than the target value (steps S15 and S44). Therefore, by increasing the output of the hot air heater (32), the temperature of the discharged air can be increased quickly. Since the rotation speed of the fan (50) remains low, the user is prevented from being exposed to relatively low-temperature discharged air.

[0092] (6-3) In this embodiment, when the temperature detected by the discharge 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). As a result, the temperature of the discharge air can be quickly reduced while the rotation speed of the fan (50) approaches the target value.

[0093] When the temperature detected by the discharge temperature sensor (70) is higher than the second value and the rotation speed of the fan (50) is higher than the target value, the control unit (C) of this embodiment reduces the output of the hot air heater (32) (steps S22 and S35). Thus, by reducing the output of the hot air heater (32), the temperature of the discharge air can be quickly reduced.

[0094] (6-4) In this embodiment, the control unit (C) stops the fan (50) and the hot air heater (32) when the temperature detected by the discharge temperature sensor (70) is higher than the third value, the output of the hot air heater (32) is at the lower limit of the first range, and the rotation speed of the fan (50) is at the upper limit of the second range (step S38). This reliably prevents the fan (50) and the hot air heater (32) from continuing operation in an abnormal state in which the discharge temperature exceeds the third value (upper limit) but cannot be resolved by controlling the fan (50) and the hot air heater (32). As a result, the reliability of the heating device (10) can be improved.

[0095] (6-5) The control unit (C) of this embodiment controls the rotation speed of the fan (50) and the output of the heater (32) based on the temperature detected by the discharge temperature sensor (70) when the heating device (10) starts operating (specifically, when the heating device (10) starts operating in the hot air mode or the hot air radiation mode). This allows for precise adjustment of the discharge temperature when the heating device (10) starts operating.

[0096] (6-6) The heating device (10) of this embodiment includes a radiant heater (31) that emits radiant heat toward the front of the casing (11). In the above-described steady-state control, the control unit (C) controls the rotation speed of the fan (50) and the output of the hot air heater (32), but does not control the output of the radiant heater (31). As described above, the responsiveness of the hot air heater (32) is higher than that of the radiant heater (31). Therefore, in the steady-state control, by controlling the output of the hot air heater (32), the temperature of the air in the room space (S) can be quickly brought closer to a desired temperature.

[0097] (7) Modifications of the embodiment The above-described embodiment may be modified as follows.

[0098] (7-1) Variation 1 The control unit (C) of the first modification sets the output of the radiant heater (31) to a second output that is greater than the first output during steady operation when the heating device (10) starts operating. Here, the operation of the heating device (10) includes the above-described hot air radiation mode and radiation mode.

[0099] As shown in FIG. 7 , at the start of operation in the radiation mode and the hot air radiation mode, the control unit (C) executes an initial operation of the heating device (10) in step S51. During the initial operation, the control unit (C) sets the output of the radiant heater (31) to the second output in step S52. The second output is a predetermined output that is greater than the first output of the radiant heater (31) in steady-state operation. The second output may be the maximum output within the control range of the radiant heater (31). In this way, at the start of operation in the radiation mode and the hot air radiation mode, the output of the radiant heater (31) is relatively large. As a result, the amount of radiant heat emitted by the radiant heater (31) can be increased, thereby enabling the room space (S) to be heated quickly.

[0100] If a predetermined first condition is met in step S53, the control unit (C) causes the heating device (10) to perform steady operation in step S54. The first condition may be a) that a predetermined time has elapsed since the start of operation of the heating device (10), or b) that the air temperature around the radiant heater (31) has exceeded a predetermined value. When determining whether the condition b) is met, the heating device (10) includes an air temperature sensor that detects the air temperature around the radiant heater (31).

[0101] In the steady operation, in step S55, the control unit (C) sets the output of the radiant heater (31) to a first output. In this example, the first output is a set output of the radiant heater (31) according to the operation mode and the output of the heating device (10), as shown in Fig. 4. In step S56, when a predetermined operation stop condition is met, the control unit (C) stops the operation of the heating device (10).

[0102] (8) Other embodiments The above embodiment and each of the modified examples may be configured as follows.

[0103] In the initial control of the above-described embodiment, the first value and the second value of the present disclosure are the same value (set temperature), but may be different values.

[0104] The front suction member (60) or the rear suction member (61) may be heat-resistant glass or a heat-resistant film.

[0105] The heating device (10) does not have to be a floor-standing type, but can also be a wall-mounted or ceiling-mounted type.

[0106] Although the embodiments and modifications have been described above, it will be understood that various modifications in form and detail are possible without departing from the spirit and scope of the claims. Furthermore, the above embodiments and modifications may be combined or substituted as appropriate as long as the functionality of the subject matter of this disclosure is not impaired. The terms "first," "second," and "third" used above are used to distinguish the terms to which these terms are attached, and do not limit the number or order of the terms. [Industrial Applicability]

[0107] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for heating devices. [Explanation of symbols]

[0108] 10 Heating equipment 11 Casing 20 Intake port 31 Radiant heater 32 Warm air heater (heater) 50 fans 70 Air outlet temperature sensor (sensor) C control section P Air passage

Claims

1. a casing (11) in which an inlet (20), an outlet (21), and an air passage (P) extending from the inlet (20) to the outlet (21) are formed; a heater (32) for heating the air flowing through the air passage (P); a fan (50) disposed in the air passage (P); a sensor (70) for detecting the temperature of the air blown out from the air outlet (21) and heated by the heater (32); a control unit (C) that controls the rotation speed of the fan (50) and the output of the heater (32) based on a detected temperature, which is the temperature of the blown air heated by the heater (32), detected by the sensor (70); The control unit (C) reducing 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; When the temperature detected by the sensor (70) is lower than the first value and the rotation speed of the fan (50) is lower than the target value, the output of the heater (32) is increased. Heating equipment.

2. a casing (11) in which an inlet (20), an outlet (21), and an air passage (P) extending from the inlet (20) to the outlet (21) are formed; a heater (32) for heating the air flowing through the air passage (P); a fan (50) disposed in the air passage (P); a sensor (70) for detecting the temperature of the air blown out from the air outlet (21) and heated by the heater (32); a control unit (C) that controls the rotation speed of the fan (50) and the output of the heater (32) based on a detected temperature, which is the temperature of the blown air heated by the heater (32), detected by the sensor (70); The control unit (C) increasing 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; When the temperature detected by the sensor (70) is higher than the second value and the rotation speed of the fan (50) is higher than the target value, the output of the heater (32) is reduced. Heating equipment.

3. 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 at the lower limit of a first range, and the rotation speed of the fan (50) is at the upper limit of a second range.

3. The heating device according to claim 1 or 2.

4. The control unit (C) controls the rotation speed of the fan (50) and the output of the heater (32) based on the temperature detected by the sensor (70) when the heating device (10) starts operating. The heating device according to any one of claims 1 to 3.

Images