Dryer for mat-like member

Abstract

To provide a dryer for a mat-like member, which can suitably control temperature in a drying space.SOLUTION: A dryer for a mat-like member comprises: a housing 20 in which a first internal space P is defined; a mat-like member mounting portion 3 having a second internal space D; a heating portion 21 heating the air; an exhaust air duct mounted with an exhaust fan 22 which causes the heated air to flow in such a manner that heated air passes through the first internal space P, the mat-like member, and the second internal space D and which discharges the air to the outside; an inflow side flow channel 251 causing the heated air to flow into the first internal space P; an inlet temperature sensor 42 to measuring an inlet temperature in the inflow side flow channel; an outlet temperature sensor 43 measure an outlet temperature in the exhaust air duct; and control means which obtains the inlet temperature and the outlet temperature and controls on / off of the heating portion 21 and air flow of the exhaust fan 22. The control means performs controls in such a way that the inlet temperature is maintained within a first reference temperature range by controlling on / off of the heating portion, the control means keeps ignited state of the heating portion, and controls the air flow of the exhaust fan to thereby maintain an input temperature within a second reference temperature range.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] An embodiment of the present invention relates to a dryer for a mat-like member. [Background technology]

[0002] Conventionally, there is known a dryer that dries a mat-like member such as a futon or mattress that has become moist due to washing, etc. One such dryer has a drying space defined in its housing into which heated air flows, a placement section for a mat-like member is disposed in the drying space, an internal space defined inside the placement section is connected to the drying space, and heated air is passed through the placed mat-like member to dry the mat-like member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-157795 A [Patent Document 2] JP 2000-288297 A [Patent Document 3] Utility Model Registration No. 3086128 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a dryer for a mat-like member capable of appropriately controlling the temperature inside the drying space. [Means for solving the problem]

[0005] a control means for controlling the on / off state of the heating unit and the air volume of the exhaust fan based on the acquired outlet temperature and outlet temperature, and for controlling the on / off state of the heating unit and the air volume of the exhaust fan based on the acquired outlet temperature and inlet temperature, the control means controlling the on / off state of the heating unit and the air volume of the exhaust fan based on the acquired outlet temperature and inlet temperature, the control means for ... The control means controls the inlet temperature to be within the early reference temperature range by controlling the heating unit on / off, maintains ignition of the heating unit, and controls the air volume of the exhaust fan to keep the input temperature within the late reference temperature range. [Brief description of the drawings]

[0006] [Figure 1] FIG. 1 is a perspective view showing a configuration of a dryer according to a first embodiment. [Diagram 2] FIG. 1 is a front view showing a configuration of a dryer according to a first embodiment. [Diagram 3] FIG. 2 is a rear view showing the configuration of the dryer according to the first embodiment. [Figure 4] FIG. 1 is a plan view showing a configuration of a dryer according to a first embodiment. [Diagram 5] FIG. 4 is a side view showing the configuration of the movable placement unit. [Figure 6] 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 7] FIG. 2 is a conceptual diagram for explaining the flow of air inside a dryer. [Figure 8]2 is a block diagram showing a hardware configuration of a control unit according to the first embodiment. FIG. [Figure 9] 3 is a functional block diagram showing a functional configuration of a control unit according to the first embodiment. FIG. [Figure 10] 5 is a flowchart showing a drying process according to the first embodiment. [Figure 11] 10 is a flowchart showing a first air volume determination process. [Figure 12] 13 is a flowchart showing a multi-stage control process. [Figure 13] 13 is a flowchart showing a multi-stage control process. [Figure 14] 13 is a flowchart showing a multi-stage control process. [Figure 15] 13 is a flowchart showing a multi-stage control process. [Figure 16] 10 is a flowchart showing a second air volume determination process. [Figure 17] 13 is a flowchart showing a normal control process. [Figure 18] FIG. 11 is a functional block diagram showing a functional configuration of a control unit according to a second embodiment. [Figure 19] 10 is a flowchart showing a drying process according to a second embodiment. [Figure 20] 13 is a flowchart showing a proportional control process. [Figure 21] 13 is a flowchart showing a proportional control process. [Figure 22] 13 is a flowchart showing a multi-stage control process according to a third embodiment. [Figure 23] 13 is a flowchart showing a multi-stage control process according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] <First embodiment> Hereinafter, the details of the embodiments of the present invention will be described with reference to the drawings. In this specification and the drawings, components having substantially the same functional configurations are denoted by the same reference numerals, and duplicated explanations will be omitted.

[0008] (Overall composition) First, the overall configuration of the dryer according to this embodiment will be described. Figures 1 to 4 are a perspective view, a front view, a back view, and a plan view, respectively, showing the configuration of the dryer according to this embodiment. Hereinafter, the front side of the dryer 1 will be referred to as the front, the back side as the back, and the direction perpendicular to the front-rear direction and the up-down direction will be referred to as the left-right direction.

[0009] As shown in FIGS. 1 to 4, a dryer 1 according to this embodiment includes a main body 2 and a movable placement section 3 that is housed in the main body 2 and on which a futon to be dried by the dryer 1 is placed.

[0010] The main body 2 includes a housing 20, a heating unit 21, an exhaust fan 22, a mist generation unit 23, and a control unit 24. The housing 20 is formed as a hollow, substantially rectangular box shape overall, and defines a drying space D (see FIG. 6) therein, surrounded by an upper wall 25 (see FIG. 6), a pair of side walls 26, a rear wall 27, a bottom wall 28, and a door 29. The movable placement unit 3 can be accommodated in this drying space D.

[0011] The door part 29 is attached to one of the side walls 26 by a hinge or the like so as to be openable and closable, and allows the movable placement part 3 to be inserted and removed from the front side into the drying space D. A part of the door part 29 is formed as a light-transmitting window part 291 made of, for example, glass, and is further provided with a grip part 292 for allowing a user to open and close the door part 29.

[0012] The heating unit 21 is provided above the upper wall portion 25 and at the rearmost part of the housing 20, and has a gas burner 211 and an intake duct 212 (see FIG. 7 for both), heats air with the gas burner 211, and supplies the heated air to an intake flow path 251 (see FIGS. 6 and 7) described later through the intake duct 212 and a connecting pipe 253. The heating unit 21 may be replaced by another device that heats air by another method.

[0013] The exhaust fan 22 is provided in front of the heating section 21, and has a check damper 221 for preventing backflow of air, and an exhaust duct 222 (see Figures 6 and 7) in which the check damper 221 is provided, and draws in air within the drying space D and expels it to the outside via the exhaust duct 222.

[0014] The mist generating unit 23 is provided on the lower rear side of the dryer 1, and has a liquid storage tank, a supply unit, and a nozzle, and can spray mist into the drying space D during spraying operation. The liquid storage tank stores liquid containing chemicals such as deodorant, disinfectant, and anti-mite agent. The supply unit is a so-called compressor that is driven and controlled by the control unit 24 and supplies compressed air to the nozzle. The nozzle is a so-called two-fluid nozzle that is fluidly connected to the liquid storage tank and the supply unit via tubes, and sucks up the chemicals in the liquid storage tank in response to the supply of compressed air by the supply unit, turns them into mist, and sprays them.

[0015] Control unit 24 is provided in front of exhaust fan 22, i.e., at the frontmost part of housing 20, and has an operation panel 241 that allows a user to give instructions regarding the operation of dryer 1, and is provided so that operation panel 241 faces forward. Control unit 24 executes a drying process, which will be described later, based on operations performed on operation panel 241. The configuration of control unit 24 will be described in detail later.

[0016] A part of the bottom wall 28 of the housing 20 functions as a travel path when the movable placement part 3 is moved back and forth, and the inside of the bottom wall 28 functions as an exhaust flow path when the movable placement part 3 is accommodated in the drying space D. The bottom wall 28 will be described in detail later together with the description of the configuration of the movable placement part 3.

[0017] (Movable mounting section 3) The configuration of the movable placement section 3 will be described in detail. Fig. 5 is a side view showing the movable placement section on which the futon is placed, and Fig. 6 is a cross-sectional view taken along line AA in Fig. 2. For the sake of explanation, parts of the connection pipes 253 and 254 arranged at different positions in the left-right direction from the cut surface are virtually shown by dashed lines in Fig. 6. The movable placement section 3 is configured to be movable in the front-rear direction, and includes a placement stand 31, a base section 32, and a pressing belt 33, as shown in Fig. 5.

[0018] As shown in Fig. 2 and Fig. 5, the mounting table 31 is generally formed in a hollow, approximately triangular prism shape with the top and bottom surfaces facing the front-rear direction and one side surface facing the most acute angled apex facing downward. In the following description, the front side of the top and bottom surfaces of the triangular prism is the front surface of the mounting table 31, the other side is the back surface of the mounting table 31, and the one side surface of the triangular prism facing downward is the bottom surface of the mounting table 31. The other two inclined side surfaces and the curved surface formed at the upper end are the mounting surface of the mounting table 31. Therefore, the mounting surface has a shape in which a plane is bent so that a virtual folding line facing the front-rear direction is positioned at the upper end. The bottom surface of the mounting table 31 is connected to the upper surface of the pedestal part 32.

[0019] On both side surfaces of the mounting table 31, there are provided punched hole groups 311 consisting of a plurality of circular holes that communicate between the internal space P of the mounting table 31 (see Figs. 6 and 7) and the drying space D. Air flows between the drying space D and the internal space P via the punched hole groups 311. In addition, on the front surface of the mounting table 31, there is provided a gripping portion 312 that a user grips when moving the movable mounting unit 3. The punched hole groups 311 are formed in an area that is covered by the futon F when the futon F is placed on it.

[0020] When placing the futon F to be dried on the placement table 31, as shown in Fig. 5, the short side direction of the futon F is oriented in the front-to-rear direction of the placement table 31, and the futon F is placed on the placement surface of the placement table 31 so as to cover the punched hole group 311. At this time, the futon F is folded so as to follow the slope of the placement surface.

[0021] 5 and 6, the base 32 is formed in a hollow, generally rectangular parallelepiped shape, and an opening 321a is formed on the upper surface thereof for connecting its internal space T with the internal space P of the mounting table 31. Meanwhile, an opening 321b is formed on the lower surface of the base 32 for connecting a downward exhaust flow path 281 (described later) formed in the bottom wall 28 of the housing 20 with the internal space T. These openings 321a and 321b allow air in the internal space P to flow into the downward exhaust flow path 281. In addition, a plurality of casters capable of moving in the front-rear direction are provided on the lower surface of the base 32.

[0022] Furthermore, the bottom wall portion 28 defines a downward exhaust passage 281 inside, and on its upper surface is an opening 282 for connecting the downward exhaust passage 281 to the internal space T, and an opening 283 for fluidly connecting the vertical passage 271 (to be described later) to the downward exhaust passage 281. A portion 287 is formed.

[0023] A sealing member 288 is provided on the periphery of the opening 282, and when the movable mounting portion 3 is accommodated in the drying space D, the periphery of the opening 321b of the base portion 32 abuts against the sealing member 288, thereby air-tightly connecting the opening 282 and the opening 321b of the base portion 32 via the sealing member 288.

[0024] The pressing belt 33 is provided on each of both sides of the mounting table 31, and presses both longitudinal ends of the futon F against the mounting surface, and has uniformly formed air holes to allow ventilation of the futon F that comes into contact with the pressing belt 33. The pressing belt 33 is formed in a belt shape whose longitudinal direction extends in the front-rear direction, and its longitudinal length is adjustable by a hook-and-loop fastener part 334. The pressing belt 33 is supported by wrapping one longitudinal end around a support member 314 that is U-shaped when viewed from the side and is provided on the front side wall of the mounting table 31, and the other longitudinal end is supported by being fixedly connected to a support member 314 provided on the rear side wall of the mounting table 31.

[0025] (Flow path in the housing 20) As shown in Fig. 6, above the upper wall 25 of the housing 20, two flat plate portions 25a, 25b are provided which extend horizontally and are parallel to each other, and the heating portion 21 and the exhaust fan 22 are placed on the flat plate portion 25b located at the top. The flat plate portion 25a located below the flat plate portion 25b is used as a boundary to divide and define two spaces in the vertical direction, and the space defined between the flat plate portion 25a and the upper wall 25 is used as an intake flow path 251, and the space defined between the flat plate portion 25a and the flat plate portion 25b is used as an upper exhaust flow path 252. The upper exhaust flow path 252 extends slightly rearward from the intake flow path 251 and is fluidically connected to the vertical flow path 271.

[0026] The vertical flow path 271 is a gap between the rear wall portion 27 and the flat plate portion 27a located in front of and parallel to the rear wall portion 27, and is formed as a space having a rectangular cross section that is elongated in the left-right direction when viewed from above and extends in the up-down direction. The vertical flow path 271 is fluidly connected to the upper exhaust flow path 252 and the lower exhaust flow path 281, which together form one exhaust flow path.

[0027] A connection pipe 253 is connected to the intake flow path 251, and a connection pipe 254 is connected to the upward exhaust flow path 252. The connection pipe 253 is fluidly connected to the intake duct 212 of the heating unit 21 and the intake flow path 251, thereby enabling the air heated by the heating unit 21 to be sucked into the intake flow path 251. The connection pipe 254 is formed corresponding to the exhaust fan 22, and is fluidly connected to the upward exhaust flow path 252, thereby enabling the exhaust fan 22 to exhaust the air in the upward exhaust flow path 252.

[0028] Further, in the upper wall portion 25, a group of inflow holes 255 is formed as air vents that connect the intake passage 251 and the drying space D and allow the air heated by the heating unit 21 to flow into the drying space D. The group of inflow holes 255 is a plurality of punching holes, and is formed over a predetermined range in the entire left-right direction and in the front-rear direction of the drying space D.

[0029] (Method of use of dryer 1 and air flow) A method of using the dryer 1 and the air flow during the use will be described with reference to Figs. 6 and 7. Fig. 7 is a conceptual diagram for explaining the air flow inside the dryer. In Fig. 7, the flow path of the dryer 1 is shown developed in a planar form. The outline arrows in Fig. 7 indicate the direction of air flow.

[0030] When using the dryer 1, first open the door 29 and pull the movable placement part 3 forward from the drying space D. The futon F is then placed on the placement surface, and the movable placement section 3 is then moved a predetermined distance backward (in the placement direction) so that the door section 29 can be closed. When the movable placement section 3 is completely placed in the drying space D, the internal spaces P, T of the movable placement section 3 are fluidically connected to the downward exhaust flow path 281, and therefore the internal spaces P, T are fluidically connected to the upward exhaust flow path 252. After the movable placement section 3 is placed in the drying space D, when the control section 24 receives a command from the user to start the drying process, the drying process is carried out and the heating section 21, exhaust fan 22, etc. are activated.

[0031] When the heating section 21 and the exhaust fan 22 are operated, the air in the upper exhaust passage 252 is discharged to the outside as shown in Fig. 7, and the internal spaces P, T in the movable placement section 3 become negative pressure via the vertical passage 271 and the downward exhaust passage 281. When the internal spaces P, T become negative pressure, the air in the drying space D passes through the futon F via the punched hole groups 311 provided on both side surfaces of the placement table 31 and is sucked into the movable placement section 3. In response to this, the drying space D becomes negative pressure, and the air outside the dryer 1 passing through the heating section 21 is sucked into the drying space D via the intake passage 251 connected to the drying space D by the inlet hole group 255.

[0032] This air flow causes the air heated by the heating section 21 to flow into the drying space D as hot air, and this hot air passes over the futon F placed on the movable placement section 3, drying the futon F. The drying process according to this embodiment mainly consists of a drying step in which heated air is blown onto the futon F as hot air, and a cooling step in which unheated air at room temperature is blown. This drying process will be described in detail later.

[0033] Furthermore, when the mist generating unit 23 is operating and air is flowing into the dry space D, the mist generated by the mist generating unit 23 is dispersed into the dry space D, and the air containing this mist passes through the futon F, allowing the medicine to penetrate into the interior of the futon F.

[0034] 7, in this embodiment, air flow sensor 41 that is activated by the difference in air pressure between the inside and outside of air intake duct 212 is provided in air intake duct 212. Specifically, when the air volume increases and the air pressure inside air intake duct 212 becomes higher than the outside, air flow sensor 41 rotates to the outside of air intake duct 212, and when the air volume inside air intake duct 212 increases sufficiently so that the amount of rotation exceeds a certain value, a switch is turned on. When this switch is turned on, a detection signal is output from air flow sensor 41 to control unit 24.

[0035] 7, in this embodiment, an intake side temperature sensor 42 that detects the temperature of the air drawn into the drying space D is provided in the intake flow path 251, and an exhaust side temperature sensor 43 that detects the temperature of the air that passes through the futon F and is exhausted from the internal space P is provided in the exhaust duct 222. The control unit 24 can monitor the temperatures of the intake and exhaust air using these temperature sensors. In addition, a lint filter 44 that captures lint contained in the air that passes through the futon F and is exhausted from the internal space P is provided in the vertical flow path 271, preventing the lint from being exhausted from the exhaust duct 222.

[0036] (Configuration of control unit 24) Next, the configuration of the control unit 24 that executes the above-mentioned drying process will be described in detail with reference to Fig. 8 and Fig. 9. Fig. 8 is a block diagram showing the hardware configuration of the control unit according to this embodiment, and Fig. 9 is a functional block diagram thereof. As shown in Fig. 8, the control unit 24 includes the above-mentioned operation panel 241, a CPU (Central Processing Unit) 242, a memory 243, and an input / output I / F 244.

[0037] The operation panel 241 is for accepting operations by a user of the dryer 1, and includes an input port for inputting coins and bills, a drying process execution button for executing the drying process, and a button for pressing a button prior to the drying process. There are provided an air blow button for blowing air into the drying space D, a spray button for causing the mist generation unit 23 to spray mist prior to the drying process, and a display for displaying the drying time, the amount of money inserted, etc.

[0038] The CPU 242 executes the main processing of the control unit 24, and the memory 243 includes RAM (Random Access Memory) and ROM (Read Only Memory), and is used as a working area for the CPU 242 as well as a storage device for storing programs for realizing various functions and various data used in processing executed by the various functions. The input / output I / F 244 is used for inputting signals from the operation panel 241 and various sensors, and for outputting control signals to the heating unit 21, exhaust fan 22, and mist generation unit 23. The various functions described below are realized by the cooperation of these pieces of hardware.

[0039] 9, the control unit 24 includes, as its functions, an acquisition unit 101, a drive control unit 102, a determination unit 103, and a setting unit 104. The acquisition unit 101 acquires a signal when money is inserted into an insertion slot of an operation panel 241, signals from various sensors, and various data stored in a memory 243. Hereinafter, the temperature of air in the intake flow path 251 indicated by a signal from the intake side temperature sensor 42 will be referred to as an inlet temperature, and the temperature of air in the exhaust duct 222 indicated by a signal from the exhaust side temperature sensor 43 will be referred to as an outlet temperature.

[0040] Based on the signals and data acquired by the acquisition unit 101, the drive control unit 102 outputs control signals for controlling the on / off of the gas burner 211 of the heating unit 21 and the mist generating unit 23, and for controlling the air volume of the exhaust fan 22, to control these. Based on the signals acquired by the acquisition unit 101 and the setting state of the dryer 1, the determination unit 103 performs various determination processes included in the drying process, such as determining the air volume and time. Based on the determination result of the determination unit 103, the setting unit 104 sets the state of the dryer 1 to, for example, a standby state. The standby state will be described in detail later.

[0041] (Drying process) Next, the drying process of the dryer 1 according to this embodiment will be described in detail with reference to Fig. 10. Fig. 10 is a flow chart showing the drying process according to this embodiment. As shown in Fig. 10, the drying process includes a drying step S1 for drying the futon F and a cooling step S2 for cooling the futon F. The drying process here is triggered when a predetermined amount of money sufficient to execute the drying process is inserted into the insertion slot of the operation panel 241 with the door section 29 closed, and the drying process execution button is pressed.

[0042] As shown in Fig. 10, first, the drive control unit 102 drives the exhaust fan 22 at a predetermined reference rotation frequency (e.g., 45 Hz) (S101). After driving, a first air volume determination process is executed to determine whether the air volume of the exhaust fan 22 is sufficient to perform the drying process (S102). This first air volume determination process will be described in detail later. After the first air volume determination process, the determination unit 103 determines whether the multi-stage control process is ON or not (S103). The multi-stage control process is a process for controlling the air volume in stages according to the temperature inside the intake duct 212, and can be appropriately set to ON / OFF by the manager of the dryer 1.

[0043] If the multistage control process is on (S103, YES), the multistage control process is executed (S104), whereas if the multistage control process is not on (S103, NO), the normal control process is executed (S105). The multistage control process and the normal control process will be described in detail later. After the process, the outlet temperature control process is executed (S106). The outlet temperature control process is a process in which the drive control unit 102 controls the exhaust fan 22 so as to maintain the rotation frequency immediately before the outlet temperature control process until a preset drying process time has elapsed, and controls the gas burner 211 on and off so as to maintain a constant temperature. The drying process time is, for example, 20 minutes, and may be variable depending on the amount of money input. These processes correspond to the drying process S1 described above.

[0044] After the outlet temperature control process, the drive control unit 102 performs a cooling process (S107). The cooling process corresponds to the cooling step S2 described above, and is a process in which the drive control unit 102 controls the exhaust fan 22 so as to maintain the rotation frequency at the time of completion of the drying step until a preset cooling step time has elapsed, and turns off the gas burner 211. After the cooling process, the drive control unit 102 stops driving the exhaust fan 22 (S108), notifies the user that the drying has been completed by displaying the message on the operation panel 241 or the like, and this flow ends.

[0045] (First air volume determination process) The first air volume determination process will be described in detail with reference to Fig. 11. Fig. 11 is a flowchart showing the first air volume determination process.

[0046] As shown in FIG. 11, first, the determination unit 103 determines whether the air volume sensor 41 is on (S201). If the air volume sensor 41 is on (S201, YES), this flow ends. On the other hand, if the air volume sensor 41 is not on (S201, NO), the determination unit 103 determines whether the air volume level is 1 (S202). The air volume level indicates the rotation frequency of the exhaust fan 22, and is set to 1 before the change. The air volume level indicates the degree of the rotation frequency of the exhaust fan 22, and the rotation frequency increases by a predetermined value every time the air volume level is increased by one step. In this embodiment, the air volume level is set in four steps from level 0, which is the reference rotation frequency, to level 3. The number of steps of the air volume level and the value of the rotation frequency that increases every time the air volume level is increased by one step can be set appropriately. For example, the air volume level may be set to five steps, and the rotation frequency may increase by 5 Hz every time the air volume level is increased by one step.

[0047] If it is determined that the air volume level is 1 (S202, YES), the determination unit 103 determines whether or not a first air volume determination time has elapsed (S203). The first air volume determination time is the time elapsed since the air volume determination process was executed, and is set to, for example, 15 seconds. If it is determined that the first air volume determination time has elapsed (S203, YES), the drive control unit 102 increases the rotation frequency of the exhaust fan 22 by one step by increasing the air volume level by one step (S204), and proceeds to step S201 for determining whether the air volume sensor 41 is on. On the other hand, if it is determined that the first air volume determination time has not elapsed (S203, NO), the air volume level is maintained as it is, and the process proceeds to step S201.

[0048] If it is determined in step S202 that the air volume level is not 1 (S202, NO), the determination unit 103 determines whether or not a second air volume discrimination time has elapsed (S205). The second air volume discrimination time is the time that has elapsed since the air volume level was increased or decreased, and is set to, for example, 5 seconds. If it is determined that the second air volume discrimination time has elapsed (S205, YES), the determination unit 103 determines whether or not the current air volume level is less than the maximum air volume level (here, 3) (S206). If it is determined that the current air volume level is less than the maximum air volume level (S206, YES), the process proceeds to step S204 in which the air volume level is increased by one level.

[0049] On the other hand, if it is determined that the current air volume level is not less than the maximum air volume level, that is, it is the maximum air volume level (S206, NO), the setting unit 104 turns on an air volume insufficiency flag indicating insufficient air volume, and this flow ends. The air volume insufficiency flag indicates that a satisfactory air volume was not obtained, and once it is turned on, for example, after the drying process is completed, the user is notified by an air volume error display, an error sound, or a blinking lamp indicating an error on the operation panel 241. When an air volume error is notified, the user can know that it is time to clean the lint filter 44. Also, if it is determined that the second air volume determination time has not elapsed (S205, NO), the process proceeds to step S201, which determines whether the air volume sensor 41 is on or not.

[0050] According to this first air volume determination process, the air volume required for combustion in the gas burner 211 can be secured in advance prior to the multistage control process for drying the futon F, and the gas burner 211 can be smoothly ignited without causing incomplete combustion. Note that the drying process may be terminated when the insufficient air volume flag is turned on.

[0051] (Multi-stage control processing) To briefly explain the multistage control process according to this embodiment, the multistage control process mainly consists of early inlet temperature control and late inlet temperature control. The early inlet temperature control is a feedback control that maintains the rotation frequency of the exhaust fan 22 constant and keeps the inlet temperature within the early reference temperature range by controlling the on / off of the gas burner 211. On the other hand, the late inlet temperature control is a feedback control that maintains the ignition of the gas burner 211 after a predetermined time has elapsed since the start of the early inlet temperature control, and keeps the inlet temperature within the late reference temperature range (first temperature range) by changing the air volume of the exhaust fan 22. The late reference temperature range here is a temperature range in which the futon F can be dried well, and it is preferable from the viewpoint of the responsiveness of the on / off control of the gas burner 211 that the early reference temperature range has at least an upper limit value higher than the late reference temperature range, i.e., that the early reference temperature range is set to a wide range.

[0052] The multistage control process will be described in detail below with reference to Figs. 12 to 15. Figs. 12 to 15 are flowcharts showing the multistage control process. As shown in Fig. 12, the determination unit 103 determines whether the time elapsed since the ignition of the gas burner 211 reaches the inlet temperature switching time (S301). The inlet temperature switching time is a time threshold for transitioning to later inlet temperature control, and if the time elapsed since the start of the drying process is less than this time, the early inlet temperature control is continued, and if it is equal to or more than this time, a transition is made to later inlet temperature control. The inlet temperature switching time is set to, for example, 3 minutes.

[0053] If it is determined that the time elapsed since the ignition of the gas burner 211 has not reached the inlet temperature switching time (S301, NO), the acquisition unit 101 acquires the outlet temperature from the exhaust side temperature sensor 43, and the determination unit 103 determines whether the acquired outlet temperature is less than a predetermined outlet set temperature (S302). The outlet set temperature is a temperature that is a drying reference, and is a temperature threshold for transitioning to outlet temperature control.

[0054] If it is determined that the outlet temperature is less than the outlet set temperature (S302, YES), the acquisition unit 101 acquires the inlet temperature from the intake side temperature sensor 42, and the judgment unit 103 judges whether the acquired inlet temperature is less than the first inlet temperature (S303). The first inlet temperature is the upper limit value in the above-mentioned reference temperature range, and is set to, for example, 165°C. If it is determined that the inlet temperature is less than the first inlet temperature (S303, YES), the judgment unit 103 judges whether the acquired inlet temperature is less than the second inlet temperature (S304). The second inlet temperature is the lower limit value in the reference temperature range, and is set to, for example, 125°C.

[0055] If it is determined that the inlet temperature is less than the second inlet temperature (S304, YES), the drive control unit 102 determines that the inlet temperature is less than the aforementioned reference temperature range, controls the heating unit 21 to ignite the gas burner 211 (S305), and executes a second air volume determination process (S306) described below. After the second air volume determination process, the determination unit 103 determines whether or not the control process end flag is on (S307). If it is determined that the control process end flag is on (S307, YES), this flow ends, whereas if it is determined that the control process end flag is not on (S307, NO), the flow proceeds to step S301.

[0056] In step S304, if it is determined that the inlet temperature is not less than the second inlet temperature (S304, NO), the drive control unit 102 determines that the inlet temperature is within the aforementioned reference temperature range, maintains the state of the gas burner 211, and proceeds to step S306. Also, if it is determined that the inlet temperature is not less than the first inlet temperature (S303, NO), the drive control unit 102 determines that the inlet temperature is equal to or greater than the aforementioned reference temperature range, controls the heating unit 21 to extinguish the gas burner 211 (S308), and proceeds to step S306.

[0057] If it is determined that the acquired outlet temperature is not lower than the outlet set temperature (S302, NO), as shown in Fig. 13, the acquisition unit 101 acquires the inlet temperature from the intake side temperature sensor 42, and the determination unit 103 determines whether the acquired inlet temperature is equal to or lower than the third inlet temperature (S309). The third inlet temperature is the upper limit value in the above-mentioned later reference temperature range, and is set to a temperature lower than the first inlet temperature, for example, 140°C.

[0058] If it is determined that the acquired inlet temperature is not equal to or lower than the third inlet temperature (S309, NO), the determination unit 103 determines that the inlet temperature exceeds the latter reference temperature range, and determines whether the current airflow level is less than the maximum airflow level (S310). If it is determined that the current airflow level is less than the maximum airflow level (S310, YES), the drive control unit 102 increases the rotation frequency of the exhaust fan 22 by one step by increasing the airflow level by one step (S311). After that, the setting unit 104 turns on the control process end flag (S312) and proceeds to step S306 as shown in FIG. 12. On the other hand, if it is determined that the current airflow level is not less than the maximum airflow level, that is, it is the maximum airflow level (S310, NO), the airflow level cannot be increased any further, so the current airflow level is maintained, and if the gas burner 211 is on, it is turned off, and the process proceeds to step S312.

[0059] In step S309, if it is determined that the acquired inlet temperature is equal to or lower than the third inlet temperature (S309, YES), the determination unit 103 determines whether the acquired inlet temperature is lower than the fourth inlet temperature (S313). The fourth inlet temperature is the lower limit of the above-mentioned later reference temperature range, and is set to, for example, 95°C.

[0060] If it is determined that the acquired inlet temperature is less than the fourth inlet temperature (S313, YES), the determination unit 103 determines that the inlet temperature is less than the later reference temperature range, and determines whether the current air volume level is 1 or more (S314), and the drive control unit 102 ignites the gas burner 211 if it is extinguished. If it is determined that the current air volume level is 1 or more (S314, YES), the drive control unit 102 reduces the rotation frequency of the exhaust fan 22 by one step by lowering the air volume level by one step (S315), and proceeds to step S312. On the other hand, if it is determined that the current air volume level is not 1 or more (S314, NO), the determination unit 103 determines that the air volume level cannot be reduced any further, and proceeds to step S312. Furthermore, when it is determined that the acquired inlet temperature is not less than the fourth inlet temperature (S313, NO), the determination unit 103 determines that the inlet temperature is within the later reference temperature range, the current airflow level is maintained, and the process proceeds to step S312. Note that, although it has been described that in step S314, the drive control unit 102 ignites the gas burner 211 if it is extinguished, it is also possible to not perform processing related to the gas burner 211 at this point, and ignite the gas burner 211 if it is extinguished when it is determined that the current airflow level is not 1 or more (S314, NO).

[0061] 12, when it is determined that the time elapsed since the ignition of the gas burner 211 has reached the inlet temperature switching time (S301, YES), the acquisition unit 101 acquires the outlet temperature from the exhaust side temperature sensor 43, and the judgment unit 103 judges whether or not the acquired outlet temperature is less than the outlet set temperature (S316), as shown in FIG 14. When the acquired outlet temperature is not less than the outlet set temperature (S316, NO), the process proceeds to step S312 as shown in FIG 13, whereas when it is less than the outlet set temperature (S316, YES), the judgment unit 103 judges whether or not the current state is a standby state (S317). The standby state will be described in detail later.

[0062] If it is determined that the air conditioner is not in the standby state (S317, NO), the acquisition unit 101 acquires the inlet temperature from the intake side temperature sensor 42, and the determination unit 103 determines whether the acquired inlet temperature is equal to or lower than the third inlet temperature (S318). If the acquired inlet temperature is not equal to or lower than the third inlet temperature (S318, NO), the determination unit 103 determines that the inlet temperature exceeds the later reference temperature range, and determines whether the current air volume level is lower than the maximum air volume level (S319). If it is determined that the current air volume level is lower than the maximum air volume level (S319, YES), the drive control unit 102 increases the air volume level by one step (S320). After the increase, the setting unit 104 sets the current state to be the standby state (S321), and proceeds to step S306 as shown in FIG. 12. On the other hand, if it is determined that the current airflow level is not less than the maximum airflow level (S319, NO), the judgment unit 103 determines that the current airflow level is the maximum airflow level, and turns off the gas burner 211 if it is on, and proceeds to step S321.

[0063] In step S318, if the acquired inlet temperature is equal to or lower than the third inlet temperature (S318, YES), the determination unit 103 determines whether or not the acquired inlet temperature is lower than the fourth inlet temperature (S322). If it is determined that the acquired inlet temperature is lower than the fourth inlet temperature (S322, YES), the determination unit 103 determines that the inlet temperature is lower than the later reference temperature range, and determines whether or not the current air volume level is equal to or higher than 1 (S323), and the drive control unit 102 ignites the gas burner 211 if it is extinguished. If it is determined that the current air volume level is equal to or higher than 1 (S323, YES), the drive control unit 102 reduces the air volume level by one step (S324) and proceeds to step S321. If it is determined that the current air volume level is not equal to or higher than 1 (S323, NO), the determination unit 103 determines that the air volume level cannot be reduced any further, and proceeds to step S306. Furthermore, when it is determined that the acquired inlet temperature is not less than the fourth inlet temperature (S322, NO), the determination unit 103 determines that the inlet temperature is within the later reference temperature range, the current airflow level is maintained, and the process proceeds to step S306. Note that, although it has been described that in step S323, the drive control unit 102 ignites the gas burner 211 if it is extinguished, it is also possible to not perform processing related to the gas burner 211 at this point, and ignite the gas burner 211 if it is extinguished when it is determined that the current airflow level is not 1 or more (S323, NO).

[0064] The above-mentioned standby state is a state that is set when the airflow level is increased or decreased by one step, and is a state in which the process of controlling the airflow level so as to keep the inlet temperature within the later reference temperature range (S318 to S320 and S322 to S324) is temporarily not performed.

[0065] If it is determined in the process of step S317 that the device is in a standby state (YES in S317), the determination unit 103 determines whether a predetermined standby setting time has elapsed (S325), as shown in Fig. 15. The standby setting time according to this embodiment indicates the time for which the standby state is maintained, and if the time elapsed since the standby state was set is less than this time, the standby state is continued, and if it is more than this time, the standby state is released. The standby setting time is set to, for example, one minute.

[0066] If it is determined that the standby setting time has not elapsed (S325, NO), the acquisition unit 101 acquires the inlet temperature from the intake side temperature sensor 42, and the determination unit 103 determines whether the acquired inlet temperature is less than the fifth inlet temperature (S326). The fifth inlet temperature according to the present embodiment is a threshold temperature for determining whether or not to rapidly lower the temperature in the drying space D to prevent overheating in the drying space D in the standby state, and is set to, for example, 155°C. If the acquired inlet temperature is not less than the fifth inlet temperature (S326, NO), the drive control unit 102 increases the air volume level to the maximum (S327) and extinguishes the gas burner 211 (S328). It is preferable that the gas burner 211 is extinguished after a predetermined burner cut standby time (for example, 1 second) has elapsed. In addition, the gas burner 211 is to be ignited again when the inlet temperature becomes equal to or less than the fourth inlet temperature.

[0067] After the fire is extinguished, setting unit 104 cancels the standby state (S329) and proceeds to step S306 as shown in Fig. 12. Similarly, if the acquired inlet temperature is less than the fifth inlet temperature in the process of step S326 (S326, YES), the process proceeds to step S306. On the other hand, if it is determined in the process of step S325 that the standby setting time has elapsed (S325, YES), the process proceeds to step S329.

[0068] The above-mentioned multi-stage control process ends when a predetermined drying process time has elapsed, even if the control process end flag is not on.

[0069] According to the above multi-stage control process, the rotation frequency of the exhaust fan 22 can be changed stepwise while checking the inlet and outlet temperatures, so the inlet temperature can be kept well within the later reference temperature range, as compared with, for example, the case where only the on / off control of the gas burner 211 is performed. Therefore, excessive temperature fluctuations in the drying space D can be suppressed.

[0070] During the multi-stage control process, if the door section 29 or the lint box housing the lint filter 44 is opened and closed, if power is restored after a power outage, or if the unit automatically returns to normal, it is preferable that the process start from the first or second air volume discrimination process.

[0071] (Second air volume determination process) Next, the second air volume discrimination process will be described in detail with reference to FIG. 16. FIG. 16 is a flowchart showing the second air volume discrimination process. As shown in FIG. 16, first, the determination unit 103 determines whether the air volume sensor 41 is on or not (S401). If the air volume sensor 41 is on (S401, YES), this flow ends. On the other hand, if the air volume sensor 41 is not on (S401, NO), the determination unit 103 determines whether the air volume setting time has elapsed or not (S402). The air volume setting time according to this embodiment is the time elapsed since the second air volume discrimination process was performed, and is set to, for example, 2 seconds.

[0072] If it is determined that the air volume setting time has elapsed (S402, YES), the determination unit 103 determines whether the air volume level is less than the maximum air volume level (S403). If it is determined that the air volume level is less than the maximum air volume level (S403, YES), the drive control unit 102 increases the air volume level by one step, executes the first air volume determination process (S405), and ends this flow. On the other hand, if it is determined that the air volume level is not less than the maximum air volume level (S403, NO), the setting unit 104 turns on the air volume shortage flag and turns on the control process end flag (S406, S407), and ends this flow. Also, if it is determined in step S402 that the air volume setting time has not elapsed (S402, NO), this flow ends.

[0073] (Normal control processing) Next, the normal control process will be described in detail with reference to FIG. 17. FIG. 17 is a flowchart showing the normal control process. The normal control process controls the gas burner 211 to be turned on and off so that the inlet temperature falls within the early or late reference temperature range, and is executed at regular intervals (for example, clock periods) in the same manner as the multi-stage control process, and ends when a predetermined drying process time has elapsed. As shown in FIG. 17, first, the determination unit 103 determines whether the air volume sensor 41 is on (S501). If the air volume sensor 41 is on (S501, YES), this flow ends. On the other hand, if the air volume sensor 41 is not on (S501, NO), the determination unit 103 determines whether the first air volume discrimination time has elapsed (S502). If it is determined that the first air volume discrimination time has elapsed (S502, YES), the setting unit 104 turns on the air volume shortage flag (S503), and this flow ends. On the other hand, if it is determined that the first air volume determination time has not elapsed (S502, NO), the process proceeds to step S501.

[0074] According to the present embodiment described above, the inlet temperature can be satisfactorily maintained within the later reference temperature range, and thus the temperature in the drying space D can be appropriately controlled. In addition, such appropriate temperature control in the drying space D can also realize, for example, an extension of the cleaning cycle of the lint filter 44 and an improvement in drying efficiency.

[0075] The flow path may be reversed by switching the positions of the heating unit 21 and the exhaust fan 22. In this case, the heated air from the internal space P of the mounting table 31 passes through the futon F and flows into the drying space D. Furthermore, the roles of the intake side temperature sensor 42 and the exhaust side temperature sensor 43 are reversed, and the air flow sensor 41 is provided in the exhaust duct 222.

[0076] <Second embodiment> In the first embodiment described above, after the transition to the later inlet temperature control, each time the inlet temperature is acquired, it is determined whether or not it is outside the later reference temperature range consisting of the range from the fourth inlet temperature to the third inlet temperature, and if it is outside the range, the air volume level is repeatedly increased or decreased by one step. A multi-stage control is incorporated into the drying process. However, it is also possible to perform control according to the deviation between the inlet temperature and the target value without performing the multi-stage control. In this embodiment, a dryer in which proportional control is incorporated into the drying process will be described as an example of such control.

[0077] Fig. 18 is a functional block diagram showing the functional configuration of the control unit according to this embodiment. As shown in Fig. 18, the control unit 24A according to this embodiment differs from the control unit 24 according to the first embodiment in that it has a new function of a calculation unit 105 that calculates the deviation (control deviation) between a predetermined temperature target value and an acquired inlet temperature. The drive control unit 102 determines and outputs the rotation frequency based on a deviation table showing the relationship between the rotation frequency and the deviation and the deviation calculated by the calculation unit 105.

[0078] The deviation table is a table in which an increase or decrease in the rotation frequency is associated with an increase or decrease in the deviation, and is stored in advance in the memory 243. In the deviation table, for example, when the deviation is a positive value, the inlet temperature is considered to be lower than the temperature target value, so as the deviation increases continuously in the positive direction, the rotation frequency decreases continuously. On the other hand, when the deviation is a negative value, the inlet temperature is considered to be higher than the temperature target value, so as the deviation increases continuously in the negative direction, the rotation frequency increases continuously. The temperature target value here is the median of the late reference temperature range. Note that, when the inlet temperature exceeds the third inlet temperature, which is the upper limit of the late reference temperature range, or the deviation corresponds to the third inlet temperature, the rotation frequency may be set to the maximum, and when the inlet temperature is less than the fourth inlet temperature, which is the lower limit of the late reference temperature range, or the deviation corresponds to the fourth inlet temperature, the rotation frequency may be set to the minimum or 0.

[0079] (Drying process) Next, the drying process of the dryer according to this embodiment will be described in detail with reference to FIG. 19. FIG. 19 is a flowchart showing the drying process according to this embodiment. As shown in FIG. 19, the drying process according to this embodiment is different from the drying process according to the first embodiment in that steps S109 to S110 are executed after the first air volume determination process of step S102. That is, after the first air volume determination process, the determination unit 103 determines whether the proportional control process is on or not (S109), and if it is on (S103, YES), the proportional control process is executed (S110), whereas if the proportional control process is not on (S109, NO), the normal control process is executed (S105).

[0080] (Proportional control process) Next, the proportional control process will be described in detail with reference to Figs. 20 and 21. Figs. 20 to 21 are flowcharts showing the proportional control process. The process before the elapsed time from the ignition of the burner 211 reaches the inlet temperature switching time is the same as the drying process shown in Fig. 12 according to the first embodiment, so a description of this process will be omitted here.

[0081] In step S302 shown in Fig. 12, if it is determined that the acquired outlet temperature is not less than the outlet set temperature (S302, NO), the acquisition unit 101 acquires the inlet temperature as shown in Fig. 20, and the calculation unit 105 calculates the deviation by subtracting the acquired inlet temperature from the temperature target value (S601). After the calculation, the drive control unit 102 selects a rotation frequency corresponding to the calculated deviation based on the deviation table, and performs airflow adjustment by driving the exhaust fan 22 at the selected rotation frequency (S602). After adjusting the airflow, the process proceeds to step S312 where a control process end flag is turned on.

[0082] In addition, in step S301 shown in FIG. 12, if it is determined that the elapsed time from the ignition of the gas burner 211 reaches the inlet temperature switching time (S301, YES), as shown in FIG. 21, the acquisition unit 101 acquires the outlet temperature from the exhaust side temperature sensor 43, and the judgment unit 103 judges whether the acquired outlet temperature is less than the outlet set temperature (S316). If it is determined that the acquired outlet temperature is not less than the outlet set temperature (S316, NO), the process proceeds to step S312 as shown in FIG. 13, while if it is determined that it is less than the outlet set temperature (S316, YES), the judgment unit 103 judges whether the current state is a standby state (S317). In step S317, if it is determined that it is a standby state (S317, YES), the process proceeds to step S325, which judges whether the standby set time has elapsed, as shown in FIG. 15. The process up to this point is the same as that of the first embodiment.

[0083] On the other hand, if it is determined that the state is not the standby state (S317, NO), the process of step S601 is executed to calculate a deviation by subtracting the acquired inlet temperature from the temperature target value, and the process of step S602 is executed to select a rotation frequency corresponding to the deviation calculated based on the deviation table and adjust the air volume by driving the exhaust fan 22 at that rotation frequency. After adjusting the air volume, the setting unit 104 sets the current state as the standby state (S321), and proceeds to step S306 in which a second air volume determination process is performed, as shown in FIG.

[0084] According to the present embodiment described above, since an appropriate rotation frequency can be determined based on the deviation between the temperature target value and the inlet temperature, the rotation frequency can be output as a continuous value, enabling more precise airflow adjustment. Although proportional control has been given as an example in the present embodiment, PID control may be performed by setting a PID gain in advance. Also, the control unit 24A may be realized by an analog circuit using a regulator or the like, and analog control may be performed in which the rotation frequency is output as a continuous value.

[0085] <Third embodiment> In the first embodiment described above, the airflow level is maintained when the gas burner 211 is returned from OFF to ON during the latter inlet temperature control. However, the airflow level may be reset to the default when the gas burner 211 is returned from OFF to ON.

[0086] The dryer according to this embodiment has the same hardware configuration and functional configuration as the dryer 1 according to the first embodiment, but differs in the multi-stage control process in step S104 in the drying process. Figs. 22 and 23 are flowcharts showing the multi-stage control process according to this embodiment. As shown in Figs. 22 and 23, the multi-stage control process according to this embodiment differs from the multi-stage control process according to the first embodiment in that steps S701 to S703 are executed after the determination process in step S313 and the determination process in step S322 are determined to be YES. Each of these processes will be described in detail below.

[0087] 22, when it is determined in the determination process of step S313 that the acquired inlet temperature is less than the fourth inlet temperature (S313, YES), the determination unit 103 determines that the inlet temperature is less than the latter reference temperature range, and determines whether the gas burner 211 is OFF (S701). When it is determined that the gas burner 211 is OFF (S701, YES), the drive control unit 102 controls the heating unit 21 to ignite the gas burner 211 (S702), and sets the air volume level to the default, i.e., the minimum level (S703), and proceeds to step S312. On the other hand, when it is determined that the gas burner 211 is not OFF (S701, NO), the process proceeds to step S314.

[0088] 23, when it is determined in the determination process of step S322 that the acquired inlet temperature is less than the fourth inlet temperature (S322, YES), the determination unit 103 determines that the inlet temperature is less than the latter reference temperature range, and determines whether the gas burner 211 is OFF (S701). When it is determined that the gas burner 211 is OFF (S701, YES), the drive control unit 102 controls the heating unit 21 to ignite the gas burner 211 (S702), and sets the air volume level to the default, that is, the minimum level (S703), and proceeds to step S321. On the other hand, when it is determined that the gas burner 211 is not OFF (S701, NO), the process proceeds to step S323.

[0089] According to the present embodiment described above, if the airflow level is maintained when the gas burner 211 is turned on from OFF, the inlet temperature can be brought quickly into the later reference temperature range, and reductions in power consumption and in the rotation noise of the fan 22 can be achieved, compared to, for example, a case in which the airflow level is at the maximum level.

[0090] In this embodiment, it has been described that the airflow level is reset to the default when the gas burner 211 is turned from OFF to ON during the later inlet temperature control in the multi-stage control process. However, the above process may be performed during the later inlet temperature control in the proportional control process. That is, when the airflow is adjusted in step S602, if the inlet temperature is below the later reference temperature range and the gas burner 211 is OFF, the drive control unit 102 controls the heating unit 21 to ignite the gas burner 211, and sets the airflow level to the default.

[0091] In the first to third embodiments, the drying program for executing the above-mentioned drying process is pre-installed inside the dryer 1, for example in the memory 243. The drying program according to the present invention also includes one stored in a storage medium. The storage medium here refers to any medium that can be read and executed by the control unit 24 (computer) of the above-mentioned dryer, such as a magnetic tape, a magnetic disk (hard disk drive, etc.), an optical disk (CD-ROM, DVD disk, etc.), a magneto-optical disk (MO, etc.), a flash memory, etc. that is removable from the dryer 1, or a medium that can be transmitted via a network.

[0092] The first to third embodiments of the present invention are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are not intended to be construed as limiting the scope of the invention. It is included in the scope and spirit of the invention, as described in the claims and their equivalents. [Explanation of symbols]

[0093] 1... Dryer (mat-type material dryer) 101...Acquisition section (temperature acquisition section) 102...Drive control unit (air volume adjustment unit) 20…Housing 21...Heating part (heating device) 22...Exhaust fan (blower section, blower device) 251... Intake passage (inlet passage) 3... Movable placement part (placement part) 311...Punching holes (ventilation holes) 321b...Opening (first opening) 43... Intake side temperature sensor (inlet temperature detection part) F…Futon (mat-like material) D...Drying space (first internal space) P...Internal space (second internal space)

Claims

1. A mat-like member dryer for drying a mat-like member, comprising: a housing defining a first internal space; a placement section configured so that the breathable mat-like member can be placed on a placement surface and can be accommodated in the first internal space, and also having a second internal space, and a vent hole communicating the first and second internal spaces is provided on the placement surface; A heating unit that heats air; an exhaust duct provided with an exhaust fan for causing the air heated by the heating unit to flow through the first internal space, the mat-like member, and the second internal space; an inlet side flow passage for introducing heated air into the first internal space; an inlet temperature sensor for measuring an inlet temperature in the inlet side flow passage; an outlet temperature sensor for measuring an outlet temperature in the exhaust duct; a control means for acquiring the inlet temperature measured by the inlet temperature sensor and the outlet temperature measured by the outlet temperature sensor, and for controlling on / off of the heating unit and controlling the air volume of the exhaust fan based on the acquired outlet temperature and inlet temperature so that the inlet temperature falls within a reference temperature range; Equipped with The control means The inlet temperature is controlled to be kept within the reference temperature range by controlling on / off of the heating unit; The ignition of the heating unit is maintained, and the air volume of the exhaust fan is controlled to maintain the input temperature within a later reference temperature range. A drying machine for a mat-like member, comprising:

2. The control means When the outlet temperature is lower than the drying reference temperature and the inlet temperature is equal to or higher than the upper limit of the reference temperature range, the heating unit is turned off; When the outlet temperature is less than the drying reference temperature and the inlet temperature is less than a lower limit of the reference temperature range, igniting the heating unit; When the outlet temperature is less than the drying reference temperature and the inlet temperature is within the reference temperature range, the state of the heating unit is maintained.

2. The drying machine for mat-like members according to claim 1 .

3. The control means When the outlet temperature is equal to or higher than the drying reference temperature and the inlet temperature is equal to or higher than the upper limit of the later reference temperature range, and the airflow level of the exhaust fan is less than a maximum airflow level, increasing the airflow level; When the inlet temperature is less than the lower limit value of the later reference temperature range and the airflow level of the exhaust fan is equal to or greater than 1, the airflow level is reduced; If the inlet temperature is within the later reference temperature range, maintain the current airflow level.

2. The drying machine for mat-like members according to claim 1 .

4. The control means When the outlet temperature is lower than the drying reference temperature, the input temperature is equal to or higher than the upper limit of the later reference temperature range, and the airflow level of the exhaust fan is lower than a maximum airflow level, increasing the airflow level; When the input temperature is less than the lower limit of the later reference temperature range and the airflow level of the exhaust fan is equal to or greater than 1, the airflow level is decreased; If the inlet temperature is within the later reference temperature range, the current air volume is maintained.

2. The drying machine for mat-like members according to claim 1 .

5. The control means 2. The dryer for a mat-like member according to claim 1, wherein when the outlet temperature is equal to or higher than the drying reference temperature and the heating unit is turned back on from off, the air volume level of the exhaust fan is set to a default.

Images