JP2006025994A - Hot air mat system and air temperature control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a higher precision in temperature control of the hot air injected out of a hot air mat. <P>SOLUTION: A hot air injection pipe 2 with hot air injection ports 3 is installed in the hot air mat 1 such as a bedding and the air blown from a fan 16 is heated with a heater 18 and the heated air is guided with an hot air hose 5 to the hot air injection pipe 2 to be injected out of the hot air injection ports 3. A controller 10 loads the atmospheric air temperature T<SB>e</SB>detected with an atmospheric air temperature detection sensor 21, the temperature T<SB>h</SB>of the hot air delivered from the heater after heating with the heater as detected with a heater delivery hot air temperature sensor 20 and the hot air injection temperature T<SB>det</SB>detected with a hot air injection temperature sensor 22 to compute the heater off temperature T<SB>of</SB>of the heater 18 using the expression with the T<SB>e</SB>and the set hot air temperature T<SB>st</SB>as variables. When the detected temperature of the hot air with the heater delivery hot air temperature sensor 20 reaches the heater off temperature T<SB>of</SB>, the controller 10 turns off the heater 18 or turns it on when the heater delivery hot air temperature sensor 20 or the hot air injection temperature sensor 22 detects the heater on temperature. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hot air mat system in which mats for bedding and nursing care are provided with a function of jetting hot air and a method for controlling the air temperature.

  For example, in winter, when sleeping in a futon at night, the futon is cold when you enter the futon, so you cannot sleep immediately, and from when you enter the futon until the futon warms to a temperature suitable for sleeping. Since it takes about 30 minutes and then falls asleep, there is a problem that it takes a long time to fall asleep after entering the futon.

  Moreover, in the field of care, the cared person is often bedridden for a long time on the bed (mat), and in that case, the bed (mat) has moisture due to sweat or the like, and it is easy to cause bed slippage. Arise.

  In order to solve the above problems, the present inventor has intensively studied, and as a result of blowing hot air from the mat placed under the futon, the futon can be quickly brought to a temperature suitable for sleeping even in winter. The time it takes to warm up and fall asleep can be shortened, and in the nursing care field, the warmth of the mat can reduce the humidity of the mat (bed) and reduce the occurrence of bed slips. I found out. Based on this verification result, the present inventor is proceeding with product development of a hot air mat system in which mats for bedding, nursing care, etc. have a function of blowing hot air.

JP-A-3-222909 JP-A-4-58907 JP-A-7-136393 JP-A-7-136392

  In order to improve the product quality of the hot air mat system, it is important to stably eject hot air of an appropriate temperature from the mat. Even if the temperature of the hot air is too low or too high, the futon cannot be heated to a temperature suitable for sleeping. This is because it cannot give warm air at a temperature that feels comfortable.

  As is well known, air as a heat transfer medium has a slow heat transfer rate, and furthermore, since there is a distance from the heater heating source to the mat, the temperature of the hot air ejected from the mat can be comfortably controlled by controlling the heater drive. It is difficult to control the temperature stably (set temperature). Of course, if a complicated temperature control method is adopted using a large-scale device, it can be expected that the hot air temperature can be comfortably controlled. However, using such a large-scale complicated device increases the device cost. However, it is difficult to disseminate widely in the world because the device is also large.

  The present invention has been made to solve the above-described problems, and has an object to stably control the temperature of hot air ejected from a mat with respect to a set temperature with a simple and small device configuration. It is an object to provide a hot air mat system capable of providing a comfortable environment and a method for controlling the air temperature.

In order to achieve the above object, the present invention is a means for solving the problems with the following configuration. That is, the first invention of the hot air mat system heats a hot air mat provided with a hot air jet pipe having a hot air jet hole, a fan of a wind supply source, and air blown from the fan. A heater, a hot air supply pipe for supplying the air heated by the heater to the hot air ejection pipe, and a heater when the temperature of the hot air ejected from the hot air ejection hole reaches a target off-temperature of the heater off driven, target-off temperature warm air is pre-set to be the hot air temperature ejected from said hot air jet holes to on-drive the heater when it reaches the target oN temperature of lower heater than the set temperature T _st and the warm air mat system and a hot air temperature control means for controlling so that the outside air temperature T and the outside air temperature detection _{sensor e} detects the warm air temperature T _h which is sent from the heater is heated by the heater Detect A hot air temperature sensor for detecting a hot air temperature in the hot air jet pipe, and the hot air temperature control means controls the temperature of the hot air sent from the heater. said heater delivery hot air temperature for the target off temperature of the heater, the hot air setting temperature T _st, detects the outside air temperature T _e and the variable of the outer air temperature detection sensor at a position that is ejected from the hot air ejection hole Based on a pre-given arithmetic expression included in the value, it is detected by an off-temperature computing unit that obtains the heater off-temperature T _of within a range of a pre-given upper limit temperature T _up and a lower limit temperature T _dw , and detected by the heater sending hot air temperature sensor temperature T _h is the heater off temperature T predetermined temperature delta _of only low temperature or the pre-constant than the temperature T _det is the hot air setting temperature T _st detected by the warm-air blow temperature sensor than _of And on the temperature calculating unit for obtaining a heater on the temperature T _on the temperature delta _st only a low temperature corresponding to the target on the temperature of the heater was, the temperature T _h detected by the heater sends hot air temperature sensor in the heater off temperature T _of when the heater was off drive on reaching the temperature T _det detected by the temperature T _h or the warm-air blow temperature sensor is detected by the heater sends hot air temperature sensor has reached the heater oN temperature, turn the heater A structure having a heater on / off drive control unit for driving is a means for solving the problem.

Further, the second invention of the hot air mat system has the configuration of the first invention, and the temperature T _det detected by the hot air ejection temperature sensor after the start of the operation of the hot air mat system is the hot air. heater on temperature only low temperature temperature delta _of the temperature T _h is detected predefined than heater off temperature T _of some heater sends hot air temperature sensor when the temperature higher by less than the switching temperature a predetermined than the set temperature T _st is set as the temperature T _det temperature T _det detected detected by said warm-air blow temperature sensor later became switching temperature or predetermined than hot air setting temperature T _st by warm-air blow temperature sensor setting the only low temperature temperature delta _st as the heater on the temperature, characterized by being configured to have a heater on the temperature switch setting portion.

Furthermore, the third invention has the configuration of the first or second invention, and the arithmetic expression for obtaining the heater-off temperature T _of has a unit of temperature in ° C., α and β are coefficients, and θ is a unit of temperature. A constant having (° C.) is given by an equation _of T _of = α × warm air set temperature T _st + β (θ−outside air temperature T _e ).

Furthermore, the fourth aspect of the invention has the configuration of the third aspect of the invention, and the coefficients α and β of the arithmetic expression for obtaining the heater-off temperature T _of are coefficients α = 1.5 and β = 2.5. The constant θ is set to θ = 27 ° C., the upper limit temperature T _{up is set} to 80 ° C., the lower limit temperature T _{dw is set} to 45 ° C., and the heater off temperature T _of is determined within a range _of 80 ≧ T _of ≧ 45. Features.

Further, the fifth invention, a structure of the first to fourth any one invention of the hot air temperature control means, outside air temperature T _e is hot air setting detected by the outside air temperature detection sensor temperature T When it is higher than _st , it has a control configuration in which the fan is driven to rotate with the heater turned off, and the air that is not heated by the heater is supplied to the hot air jet pipe.

Further, the invention of the air temperature control method of the hot air mat system includes a hot air mat provided with a hot air jet pipe having a hot air jet hole, a fan of a wind supply source, and air blown from the fan. A heater for heating, a hot air supply pipe for supplying the air heated by the heater to the hot air ejection pipe, and a temperature of the hot air ejected from the hot air ejection hole reaches a target off temperature of the heater The heater is turned off and the heater is turned on at a heater on temperature lower than the target off temperature so that the hot air temperature ejected from the hot air ejection hole becomes a preset warm air temperature _Tst. in warm air control method for a hot air mat system including a hot air temperature control means, the controlling to detect the outside air temperature T _e, the hot air temperature T _h which is heated is sent from the heater by a heater, Sent from the heater A heater sending hot air temperature for the temperature of the air becomes the target off temperature of the heater at the position ejected from the warm-air blow holes, a hot air setting temperature T _st, the variable value and the detected outside air temperature T _e previously given determined as heater off temperature T _of based on the arithmetic expression, is configured to be turned off driving the heater when the detected temperature T _h of the warm air delivered from the heater reaches the heater off temperature T _of, heaters off, including The drive is based on the detected temperature of the warm air sent from the heater and the set temperature of the warm air, without using the value directly detecting the temperature of the warm air ejected from the hot air ejection hole of the warm air ejection pipe. It has become the means which solves the said subject by having set it as the structure controlled.

In the present invention, the heater is turned off when the temperature of the hot air ejected from the hot air ejection hole reaches the target off-temperature of the heater, and when the temperature reaches the target on-temperature of the heater lower than the target off-temperature Is turned on to control the temperature of the hot air ejected from the hot air ejection hole. The characteristic feature of the present invention is that the temperature of the hot air ejected from the hot air ejection hole is detected and detected. Rather than driving the heater off when the temperature reaches the target off temperature of the heater, the target off temperature of the heater given by the hot air temperature ejected from the hot air ejection hole is set to the warm air delivery position of the heater, that is, expressed as heater off temperature T _of in terms of the value of the warm air temperature position of the heater delivered hot air temperature sensor, a heater when the hot air temperature detected by the heater delivery hot air temperature sensor has reached the heater off temperature T _of It is to off.

When the detected hot air temperature of the heater sending hot air temperature sensor has reached the heater off temperature T _of , the hot air at the temperature of T _of the hot air sending position of the heater is supplied to the hot air mat and the hot air blowing hole It means that the target off temperature of the heater is reached at the position where the gas is ejected from the heater. Therefore, when the heater is turned off when the hot air temperature detected by the heater delivery hot air temperature sensor has reached the heater off temperature T _of, from warm-air blow holes after the moment the hot air of the target off temperature of the heater is ejected Since the air that is not heated by the heater will be ejected from the warm air ejection hole, the warm air that is ejected from the warm air mat will not be ejected as warm air with an overshoot higher than the target off temperature of the heater, Thereby, the epoch-making effect that the temperature of the hot air ejected from the hot air ejection hole can be controlled to a temperature not exceeding the target off-temperature of the heater is obtained.

  On the other hand, when the temperature of the hot air ejected from the hot air ejection hole is detected and the heater is turned off when the detected temperature reaches the target off temperature of the heater, when the heater is turned off, Since the warm air already heated by the heater remains before the heater is turned off in the flow path from the heater to the warm air ejection hole, the warm air that has reached the target off-temperature of the heater from the warm air ejection hole. The remaining hot air continues to come out of the hot air blowout hole even after the air is blown out (the hot air having a temperature higher than the target off temperature of the heater may continue to be blown out), It is not possible to prevent the overshoot of overshooting hot air from being blown out, and in this case, the user is uncomfortable. However, in the present invention, as described above, such a problem occurs. Does not occur.

  Further, in the present invention, when the heater on temperature corresponding to the target on temperature of the heater is detected, the heater is turned on, so that the temperature of the hot air ejected to the hot air mat is not too low, It is possible to achieve suitable air temperature control with a small vertical fluctuation with respect to the warm air set temperature. Moreover, in the present invention, since the mat is heated not by the electric heater but by the warm air, the dehumidifying effect of the hot air mat is excellent. The occurrence of bed slippage can be suppressed.

Further, as an arithmetic expression for obtaining the heater-off temperature T _of , in the invention given as a basic expression, an expression of T _of = α × warm air set temperature T _st + β (θ−outside air temperature T _e ) Even if the temperature is changed or the outside air temperature changes, the heater off temperature T _of can be obtained using one common simple calculation formula, so that the calculation configuration is simplified, the device configuration is simplified, and the device is lightweight. Miniaturization and reduction in device cost can be achieved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows the configuration of the first embodiment of the hot air mat system according to the present invention, and FIG. 5 shows the system configuration in the state of use. As shown in FIGS. 2 and 5, the hot air mat system according to the first embodiment includes a hot air mat 1, a hot air hose 5 as a hot air supply pipe, and a hot air supply device 8. It is configured. The hot air mat 1 is constructed by laying (accommodating) a hot air jet pipe 2 in the mat 1a. The hot air jet pipe 2 has a hot air jet hole 3 for jetting hot air toward the upper surface of the mat 1a. A plurality of are formed. A hot air jet temperature sensor 22 for detecting the temperature in the hot air jet pipe 2, that is, the temperature of the hot air jetted from the hot air jet hole 3, is provided at an appropriate position of the hot air jet pipe 2 (FIG. 2). The detection signal of the hot air jet temperature sensor 22 is applied to the hot air supply device 8.

  As shown in FIG. 5, the hot air mat 1 is entirely covered with a mat cover 4. When this hot air mat 1 is used, the sheet 6 is put on the upper side of the mat cover 4, the user 25 lies on it, and the comforter 7 is hung on it. It is used as a mat for a bedding for a healthy person or as a mat for a bedding for care. In addition, the code | symbol 24 in FIG. 5 has shown the pillow.

  As shown in FIGS. 2 and 5, the distal end side of the warm air hose 5 is connected to the proximal end side of the warm air jet pipe 2 laid on the warm air mat 1, and the proximal end side of the warm air hose 5 is warm. It is connected to the wind supply device 8 side. As shown in FIG. 2, the hot air supply device 8 is configured by housing a fan 16, a heater (electric heater) 18, and a control device 10 in a case (housing) 35.

  The fan 16 has an air volume controlled by rotation control of a fan motor (not shown). One end side of the heater housing 17 is connected to a cylinder portion of the air outlet, and the inside of the heater housing 17 is a ventilation chamber through which air flows. The heater 18 is disposed in the ventilation chamber 19. The outlet side of the ventilation passage of the heater housing 17 forms a small-diameter outlet air passage. The proximal end side of the hot air hose 5 is connected to the distal end side (outlet side) of the outlet air passage, and is generated by the fan 16. The warm air is heated by the heater 18, and the warm air is supplied to the warm air ejection pipe 2 via the warm air hose 5 and ejected from the warm air ejection hole 3.

The temperature of the warm air immediately after being heated by the heater 18 in the outlet air passage of the ventilation chamber 19, that is, the warm air temperature heated by the heater 18 and sent from the heater 18 (hereinafter also referred to as the heater warm air temperature). T _h heater sends warm air temperature sensor 20 for detecting are provided. in addition, the fan 16 fan rotation detecting sensor 26 for detecting the fan speed (rotational speed) is provided. Detection signals of these sensors 20 and 26 are applied to the control device 10. Further, the case 35 filter 23 is disposed on the air inlet, this is in the vicinity of the air inlet and the outside air temperature detection sensor 21 for detecting the outside air temperature T _e is provided, the outside air temperature detection sensor 21 The detection signal is applied to the hot air supply device 8. Each of these temperature sensors 20, 21, and 22 is formed of a thermistor in the illustrated example, but may of course be a temperature sensor having a configuration other than the thermistor.

  The control device 10 has an operation panel 9, which is exposed to the outside through a window (not shown) of the case 35, and switches and button operations on the operation panel 9 are outside the hot air supply device 8. It can be operated from The operation panel 9 is provided with a display unit 12, an energization confirmation lamp 13, temperature setting buttons 15a and 15b, and an operation switch 14. The operation switch 14 is a switch for turning on and off the operation of the hot air supply device 8, and the temperature setting buttons 15 a and 15 b are buttons for setting the temperature of the hot air ejected from the hot air ejection hole 3. Each time the button 15a is pressed, the temperature decreases by a unit temperature (for example, 1 ° C. or 0.5 ° C.), and each time the temperature setting button 15b is pressed, the temperature increases by the unit temperature.

The display unit 12 displays the temperature (hot air set temperature) _Tst set by the temperature setting buttons 15a and 15b, and is configured by, for example, a two-digit 7-segment LED. The energization confirmation lamp 13 is a lamp for confirming the power supply of the hot air supply device 8 and is formed of an LED (light emitting diode) or the like, and emits light only when the power is on to notify that the power is on. A power cable 11 is led out from the hot air supply device 8, and a power plug and a ground wire are provided at the end of the power cable 11, and the power plug is inserted into a commercial power outlet, and the ground wire is connected to the outlet. By connecting to the ground terminal (see FIG. 5), the hot air mat system (hot air supply device 8) can be operated by a commercial power supply (AC 100V).

A control board is arranged in the control device 10, and a circuit of the hot air temperature control means 27 and a circuit of the air volume control means 33 shown in FIG. In this embodiment, the hot air temperature control means 27 includes a temperature calculation unit 28 configured by a CPU, a memory 31, and a heater on / off drive control unit 32. The actual memory is composed of various volatile and non-volatile memories such as RAM, ROM, and EEPROM. Here, in order to avoid complication of illustration, these memories are integrated into one block. It is shown as a memory 31. The temperature calculation unit 28 calculates the temperature of the hot air for turning on and off the heater 18 by calculation so that the hot air ejection temperature ejected from the hot air ejection hole 3 becomes the warm air set temperature _Tst . The off-temperature calculating unit 29 and the on-temperature calculating unit 30 are configured.

The off temperature calculation unit 29 obtains the hot air temperature for turning off the heater 18 as the heater off temperature T _of . Specifically, the temperature unit is ° C., α and β are coefficients, and θ is a temperature unit ( as a constant with ° _C.), using the basic formula _{T of} = _α × hot air set temperature _{T st} + _{β (θ-} outside air temperature _{T e),} the upper limit temperature _{T up} and the lower limit temperature predetermining heater off temperature _{T of} A value within the range of T _dw is obtained (T _up ≧ T _of ≧ T _dw ). What is characteristic in the present embodiment is that the heater-off temperature T _of is obtained from the hot air temperature at the warm air delivery position _of the heater 18 (position where the heater delivery hot air temperature sensor 20 is disposed).

When the heater 18 is turned on / off so that the hot air jet temperature ejected from the hot air jet hole 3 becomes the hot air set temperature T _st , basically the hot air jet temperature ejected from the hot air jet hole 3 is A target temperature for turning off the heater 18 (a target off temperature of the heater: for example, a temperature 3 ° C. higher than the hot air set temperature _Tst ) and a target on temperature of the heater lower than the target off temperature of the heater (for example, defining a 3 ° C. lower temperature) than the hot air setting temperature T _st, warm-air blow temperature is ejected from the hot air blowing holes 3 turns off the heater 18 when it comes to the target off temperature of the heater, the warm-air blow temperature A control mode is adopted in which the heater 18 is turned on when the target on-temperature of the heater is reached. In this case, it should be particularly noted that the hot air jet temperature ejected from the hot air jet hole 3 is determined to be the target off temperature of the heater by detecting the hot air temperature at the position of the hot air jet hole 3. In this case, after the heater 18 is turned off, a situation where hot overshoot hot air exceeding the target off temperature of the heater is ejected from the warm air ejection hole 3 cannot be avoided. This problem is caused by the following reason.

  That is, when the warm air temperature sensor 22 detects that the warm air temperature has reached the target off-temperature of the heater, if the heater 18 is turned off, the warm air already heated by the heater 18 and the warm air are ejected from the heater 18. It may exist (remain) in the air path between the holes 3 and the temperature of the existing (remaining) hot air may exceed the target off-temperature of the heater. In that case, after the heater 18 is turned off, the hot air of the overshoot exceeding the target off temperature of the heater is continuously blown out from the hot air blowing hole 3, which causes discomfort to the user. Occurs.

In the present embodiment, in order to avoid such a problem, when it came to the position hot air hot air temperature T _h which is sent from the heater 18 is ejected from the warm-air blow-hole 3 (warm-air blow In order to reach the target off temperature of the heater (at a position in the pipe 2, that is, a position in the hot air ejection pipe 2 detected by the hot air ejection temperature sensor 22), the heater delivery hot air temperature _Th is The number of times is calculated. The calculated temperature is defined as a heater off temperature T _of for turning off the heater 18. This is the position where hot air temperature of the T _of when the heater sending hot air temperature T _h is a heater off temperature T _of is ejected from the warm-air blow-hole 3 from the delivery side warm-air blow pipe 2 of the heater 18 Means that the target off temperature of the heater is detected.

Characteristic feature in this embodiment is that has a structure to turn off the heater 18 when the heater sending hot air temperature sensor 20 detects the heater off temperature T _of. With this configuration, when the heater 18 is turned off, the hot air heated by the heater 18 already exists (remains) in the air path between the heater 18 and the hot air ejection hole 3. Since it is detected as a temperature lower than the heater off temperature T _of by the heater sending hot air temperature sensor 20, the remaining hot air does not exceed the target off temperature of the heater when it exits the hot air outlet 3. Thus, by adopting the configuration of the present embodiment, the heated hot air of the heater 18 does not exceed the heater's target off-temperature and is not ejected from the hot air ejection hole 3, giving the user a sense of discomfort. A comfortable warm air control is achieved.

As an example in the present embodiment, the calculation formula _of the heater-off temperature T _of stored in the memory 31 is T _up ≧ T _of ≧ T _dw , T _of = α × warm air set temperature T _st + β (θ−outside air temperature) The basic formula of T _e ) is further specified, and T _up = 80 ° C., T _dw = 45 ° C., α = 1.5, β = 2.5, θ = 27 ° C., and 80 ≧ T _of ≧ 45, T _of = 1.5 × warm air set temperature T _st +2.5 (27−outside air temperature T _e ) If this T _of equation is shown more simply, T _of = 1.5 × T _st +2.5 (27−T _e ). The calculation formula for obtaining the heater-off temperature T _of is derived based on the graph shown in FIG. 4 and will be described below.

The horizontal axis of the graph shown in FIG. 4 represents the heater off temperature T _of , and the vertical axis represents the target off temperature (warm air ejection temperature). Each characteristic line shows the relationship between the target off temperature and the heater off temperature T _of at each outside air temperature T _e1 , T _e2 , T _e3 (T _e1 ≦ T _e2 ≦ T _e3 ). For example, in order for the hot air ejection temperature to be the target off temperature T _t when the outside air temperature is T _e2 , the heater sending hot air temperature on the hot air sending side of the heater 18, that is, the heater off temperature T _of is T _of2. next, also, heater off temperature when the outside air temperature is higher than T _e3 is meant to be a T _of1.

Thus, when the target off temperature T _t is set to a constant temperature, the heater off temperature T _of becomes a different value depending on the outside air temperature. Therefore, in order to change heater off temperature T _of the outside air temperature T _e is changed, it is in order to perform the off control of the heater 18 by the heater off temperature T _of providing seek by experiment or the like different myriad of characteristic lines of the outside air temperature Is required. Along with changing the hot air setting temperature T _st, if also target off temperature T _t is varied, along with the change in outside air temperature T _e considering changes in hot air setting temperature T _st, further countless characteristic line It is necessary to obtain and prepare by experiment.

However, it is difficult to prepare an infinite number of characteristic lines with different outside air temperatures and hot air set temperatures, and even if such an infinite number of characteristic lines can be prepared, the data of the characteristic lines is stored in the memory. For this purpose, a memory with a large storage capacity or a large number of memories must be prepared, the control configuration becomes complicated, the control device becomes large, the weight increases, and the cost increases. End up. Therefore, in the present invention, in order to avoid such a problem, a representative characteristic line for one outside temperature is selected, and the heater off temperature T _{of the} other outside temperature is obtained by a correction calculation using the characteristic line. It consists of a control configuration.

In this embodiment, one outside air temperature (T _{e2 in} the example of FIG. 4) is selected, the selected outside air temperature characteristic line is used as a representative characteristic line, and the constant θ is the selected outside air temperature value. . Then, in the basic equation for determining the heater off temperature T _of , (θ−outside air temperature T _e2 ) = 0, so in the representative characteristic line (characteristic line where the outside air temperature is T _e2 ), the equation _of the heater off temperature T _of is It does not include the section of the outside air temperature _{T e,} the heater off temperature _{T of2} = _α × hot air setting temperature _{T st.} That is, in the typical characteristic line, heater off temperature T _of2 is a value of α culture of hot air set temperature T _st. Therefore, the value of the coefficient α can be obtained by _{obtaining the} heater off temperature T _of2 (heater sending warm air temperature T _h ) at which the temperature of the warm air ejected from the warm air ejection hole 3 becomes the target off temperature of the heater by experiment. It was obtained by dividing the heater off temperature _{T of2} with warm air set temperature _{T st.}

Then, another characteristic line with different outside air temperature, that is, the characteristic line of the outside air temperature T _{e3 in} the example of FIG. 4, similarly, the heater off temperature T _of1 when the outside air temperature is T _e3 is obtained by experiment, and − (T _{of2 -Tof1} ). The value of − (T _of2 −T _of1 ) corresponds to β (θ−outside air temperature T _e3 ) of a term related to the outside air temperature in the basic expression for obtaining the heater off temperature T _of , and therefore, {− (T _of2 − The value of the coefficient β is obtained by dividing the value of T _of1 )} by (θ−outside air temperature T _e3 ). In this manner, heater off temperature T coefficients of the basic formula for determining the _of alpha, beta, is a constant theta, representative to become the outside air temperature T _e of the characteristic line selected one, the outside air temperature (in the case of the T _e2) experiment retrieved values of heater off temperature (the above case T _of2) and experimental acquisition value of heater off temperature of the other one of the outside air temperature characteristic (in the case of the T _of1) obtained easily from the relationship with the.

In this embodiment, a representative characteristic line is a characteristic line with an outside air temperature of 27 ° C., and values of θ = 27 ° C., α = 1.5, and β = 2.5 are obtained as described above. . Then the heater off temperature _{T of} the upper limit temperature _{T up} to the 80 ° C., as 45 ° C. The lower limit temperature _{T dw} of heater off temperature _{T of,} so as to obtain a temperature value within the range of heater off temperature _{T of} the 80 ≧ _{T of} ≧ 45 More specifically, a formula of T _of = 1.5 × warm air set temperature T _st +2.5 (27−outside air temperature T _e ) is given to the memory 31 (stored) as an arithmetic expression _of the heater off temperature T _of. ing).

The upper limit temperature T _up and the lower limit temperature T _{dw of} the heater off temperature T _of are provided corresponding to the change range of the outside air temperature, the upper limit temperature T _up corresponds to the lowest temperature of the outside air temperature range, and the lower limit temperature T _dw is Corresponds to the highest temperature in the outside air temperature range. When the calculated value _of the heater off temperature T _of exceeds the upper limit temperature T _up , the heater off temperature T _of is fixed at the upper limit temperature T _up, and the calculated value _of the heater off temperature T _of lowers the lower limit temperature T _dw When the temperature exceeds, the heater off temperature T _of is fixed at the lower limit temperature T _dw . Thus, by providing the upper and lower limits to the calculated value of the heater off temperature T _of, since the calculated value of the abnormal heater off temperature T _of the when obtained, the abnormal value is excluded without being employed, warm air It is possible to prevent the occurrence of a problem that the temperature of the hot air ejected from the mat 1 becomes abnormally high or abnormally low.

In the present embodiment, the off temperature calculation unit 29 obtains information on the outside air temperature detected by the outside air temperature detection sensor 21 and information on the hot air set temperature T _st set by the temperature setting buttons 15a and 15b. The heater off temperature T _of is calculated using the calculation formula _of the heater off temperature T _of stored in the memory 31, and the calculated value is added to the heater on / off drive control unit 32 and the on temperature calculation unit 30. In this embodiment, the off-temperature calculator 29 includes a clock mechanism (not shown), and the off-temperature calculator 29 uses the clock mechanism to set a predetermined time interval (for example, The detection signal of the outside air temperature of the outside air temperature detection sensor 21 is sampled at intervals of 5 minutes), and the heater off temperature T _of is calculated for each sampling.

The on-temperature calculating unit 30 calculates a temperature that is lower than the heater off-temperature T _of obtained from the off-temperature calculating unit 29 by a predetermined temperature Δ _of (for example, 6 ° C.) as a heater on-temperature T _on corresponding to the target on-temperature of the heater. Obtained (T _{on =} T _of −Δ _of ), and the obtained value is added to the heater on / off drive control unit 32.

Heater on, off drive control unit 32 takes the information of the heater sending hot air temperature T _h which is detected by the heater sends warm air temperature sensor 20, the heater 18 when the heater sending hot air temperature T _h has reached the heater off temperature T _of the off driving, to turn on driving the heater 18 when the heater sending hot air temperature T _h reaches the heater on the temperature T _on. Further, the heater on, off drive control unit 32 takes the information of the outside air temperature T _e detected by the outside air temperature detection sensor 21 and information of the hot air setting temperature T _st, the outside air temperature T _e is from hot air setting temperature T _st During the higher period (T _e > T _st ), the heater 18 is maintained and controlled to be in an OFF state, and wind that is not heated by the heater is ejected from the hot air ejection hole 3.

The air volume control means 33 takes in the fan rotation detection signal from the fan rotation detection sensor 26 and operates the operation amount (power, voltage, frequency, phase angle, etc.) to the motor of the fan 16 so that the preset rotation speed _Nst is given. Control). More preferably, the set rotation speed _Nst of the fan 16 is configured so as to be variably set by providing a dedicated fan rotation setting button on the operation panel 9, or a hidden mode (back) using the temperature setting buttons 15a and 15b. The set rotational speed _Nst can be variably set by operating according to the operation method of (mode).

In this embodiment, when the operation switch 14 is turned on, the power of the hot air supply device 8 is turned on, the fan 16 is driven to rotate, and the rotation of the fan 16 is set by the air volume control means 33 to the set rotational speed N. Controlled by _st . Then, the heater on, off drive control unit 32 compares captures the information of the outside air temperature T _e from the hot air setting temperature T _st information and outside air temperature detection sensor 21, the outside air temperature T _e is hot air setting temperature T When the temperature is higher than _st , the heater 18 is kept off, and air that is not heated by the heater 18 is ejected from the warm air ejection hole 3.

On the other hand, the heater on, off drive control unit 32, when the outside air temperature T _e is less hot air setting temperature T _st turns on driving the heater 18. When the heater 18 is turned on, warm air heated from the heater 18 is introduced into the warm air ejection pipe 2 via the warm air hose 5, and warm air is ejected from the warm air ejection hole 3. Meanwhile, off temperature calculating section 29 takes in the information of the information and the outside air temperature T _e of the hot air setting temperature T _st, the heater off temperature T _of using heater off temperature T _of the calculation formula stored in the memory 31 calculated, on the temperature calculating unit 30 calculates the heater on the temperature _{T on} the operation of the _T on _{= T of -Δ of.}

Heater on, off drive control unit 32 compares the heater delivery hot air temperature T _h which is detected by the heater sends warm air temperature sensor 20 and the heater off temperature T _of, the heater sends hot air temperature T _h within heater off temperature T _of When it reaches, the heater 18 is turned off. Then, the air that is not heated by the heater 18 is guided to the warm air ejection pipe 2 and ejected from the warm air ejection hole 3, but as time passes, the temperature detected by the heater delivery warm air temperature sensor 20 (heater delivery temperature) wind temperature) T _h is gradually decreased, when the temperature T _h reaches the heater on the temperature T _on, the heater 18 is turned on. In this way, the heater 18 is turned on and off, and the hot air mat system (hot air supply device 8) is continuously operated. When the operation switch 14 is turned off, the operation ends. To do.

Next, a second embodiment of the present invention will be described. The second embodiment is different from the first embodiment in that the ON temperature of the heater 18 is set by the hot air temperature ejected from the hot air ejection hole 3, and the other points are the first embodiment. Since it is the same as that of the embodiment, overlapping description of common components will be omitted. In this second embodiment, the heater-on temperature is set to a temperature that is lower than the hot air set temperature T _st by a predetermined temperature Δ _st (for example, 1 ° C.), and the hot air set temperature T _st is changed. each time it is, on the temperature calculation section 30 to the heater on the temperature _{T on,} determined by the calculation of _T on ₌ T _st -Δ _st, adds the value heater on, off the drive control unit 32.

Heater on, the T _det (warm air temperature is ejected from the warm-air blow holes 3) off the drive control unit 32 hot air temperature detected by the warm-air blow temperature sensor 22 is compared with the heater on the temperature T _on, warm-air blow temperature T _det is turned drives the heater 18 (when lowered to heater off temperature _{T of)} when reaching the heater off temperature _{T of.} In the second embodiment, the same effects as in the first embodiment can be obtained.

Next, a third embodiment of the present invention will be described. This the third embodiment is characterized is that which is configured to be switchable set in accordance with on the temperature T _on the heater 18 in the warm-air blow temperature from warm-air blow-hole 3, configuration otherwise Are the same as those in the first and second embodiments, and redundant description of the same components as those in the first and second embodiments is omitted.

In the third embodiment, as shown by the one-dot chain line in FIG. 1, the warm air temperature control means 27 is provided with a heater on temperature switching setting unit 34. The heater ON temperature switching setting unit 34 is given a predetermined additional temperature Δ _av (for example, 1 ° C.), and the heater ON temperature switching setting unit 34 is a value obtained by adding the additional temperature Δ _av to the hot air setting temperature T _{st. Is} set as the switching temperature T _ex .

And, when comparing the heater on temperature change setting unit 34 and the warm-air blow temperature T _det detected by warm-air blow temperature sensor 22 and the switching temperature T _ex, is hot air jetting temperature T _det below the switching temperature T _ex heater on the temperature T _on command the oN temperature calculation unit 30 so as to calculate the predetermined temperature delta _of only lower temperatures than similarly heater off temperature T _of the case of the first embodiment as the heater on the temperature T _on, When the hot-air ejection temperature T _det is equal to or higher than the switching temperature T _ex , the heater-on temperature T _on is set to a temperature that is lower than the hot-air set temperature T _st by a predetermined Δ _st as in the case of the second embodiment. commanding turning on temperature calculating unit 30 to compute the temperature T _on. The heater _{on /} off drive control unit 32 is also informed of the heater on / off switching command signal.

As a result, the heater on / off drive control unit 32, as shown in FIG. 3, when the hot air jet temperature T _det detected by the hot air jet temperature sensor 22 is lower than the switching temperature T _ex (section A in FIG. 3). when) is similar to the case of the first embodiment, the heater sends hot air temperature T _h which is detected by the heater sends warm air temperature sensor 20 is a predetermined than the heater on the temperature T _{on (heater} off temperature T _of when reaching only low temperature) temperature delta _of the heater 18 is oN-driven (when lowered), after the warm-air blow temperature T _det is equal to or greater than the switching temperature T _ex (when B section of FIG. 3) is as in the case of the second embodiment, a detected temperature T _det is heater-on temperature (hot air setting temperature T predetermined temperature delta _st only lower temperature than _st) T _on the warm-air blow temperature sensor 22 Turns on driving the heater 18 when.

Thus, in this third embodiment, warm-air blow temperature T _det is a boundary the switching temperature T _ex in the case of less than the temperature and time of the temperature above, is switched heater on the temperature T _on Therefore, more precise control of the hot air temperature is possible. Also, the third embodiment has the same effects as the first and second embodiments.

In addition, this invention is not limited to the structure of each said embodiment, Various embodiment can be taken. For example, long calculation equation for obtaining an off temperature T _of the heater than Ataeraru intended by the formula in which a variable warm air set temperature T _st and the outside air temperature T _e, other than arithmetic expression shown in the above embodiment An arithmetic expression may be used.

It is explanatory drawing of the warm air temperature control structure of one embodiment of the warm air mat system according to the present invention. It is explanatory drawing of the whole structure of the warm air mat system in the example of the embodiment. It is a time chart which shows an example of the warm air temperature control of the warm air mat system in the present embodiment. It is a graph for explanation which derives a calculation formula _of heater off temperature T _of in this embodiment example. It is explanatory drawing of the usage form of the warm air mat system of this embodiment.

Explanation of symbols

1 Hot Air Mat 2 Hot Air Jet Pipe 3 Hot Air Jet Hole 5 Hot Air Hose (Hot Air Supply Pipeline)
DESCRIPTION OF SYMBOLS 8 Hot air supply apparatus 10 Control apparatus 20 Heater sending hot air temperature sensor 21 Outside air temperature detection sensor 22 Hot air ejection temperature sensor 27 Hot air temperature control means 29 OFF temperature calculation part 30 ON temperature calculation part 32 Heater ON / OFF drive control part 34 Heater on temperature switching setting section

Claims (6)

A hot air mat provided with a hot air jet pipe having a hot air jet hole, a fan as a wind supply source, a heater for heating air blown from the fan, and the air heated by the heater When the temperature of the hot air supplied from the hot air supply pipe and the temperature of the hot air discharged from the hot air outlet reaches the target off-temperature of the heater, the heater is turned off, and the heater lower than the target off-temperature Hot air temperature control means for controlling the hot air temperature ejected from the hot air ejection hole to become a preset warm air temperature T _st when the heater is turned on when the target on temperature is reached; in hot air mat system and a outside air temperature sensor for detecting the outside air temperature T _e, the heater sends hot air temperature sensor for detecting the warm air temperature T _h which is sent from the heater is heated by the heater, the temperature Wind spout pie A hot air jet temperature sensor for detecting the temperature of the hot air inside the hot air temperature control means, wherein the hot air temperature control means is a position where the temperature of the hot air sent from the heater is jetted from the hot air jet hole. a heater sending hot air temperature for the target-off temperature, the hot air setting temperature T _st, previously given on the basis of the detected outside air temperature T _e and previously given arithmetic expression including the variable value of the outdoor temperature sensor and off temperature calculating unit for obtaining within the upper limit temperature T _up and the lower limit temperature T _dw as heater off temperature T _of, the temperature T _h detected by the heater sends hot air temperature sensor is predetermined than the heater off temperature T _of temperature delta _of only low temperature or the target of the heater a predetermined temperature delta _st only lower temperature than the temperature T _det is the hot air setting temperature T _st detected by the warm-air blow temperature sensor And on the temperature calculating unit for obtaining a heater on the temperature T _on corresponding to the down temperature, the heater is turned off driven when the temperature T _h detected by the heater sends hot air temperature sensor reaches the heater off temperature T _of, the heater when the temperature T _det detected by the temperature T _h or the warm-air blow temperature sensor is detected by the delivery hot air temperature sensor has reached the heater oN temperature, has the heater on to turn on driving the heater, and off the drive control unit, the Hot air mat system characterized by that. After the operation of the hot air mat system is started, when the temperature T _det detected by the hot air jet temperature sensor is lower than the switching temperature higher than the hot air set temperature T _st by a predetermined temperature, it is detected by the heater sending hot air temperature sensor since the temperature T _h is set a predetermined temperature delta _of only a temperature lower than the heater off temperature T _of the heater ON temperature, the temperature T _det detected by warm-air blow temperature sensor has become the switching temperature than is temperature T _det detected to set a predetermined temperature delta _st only lower temperature than the hot air setting temperature T _st as the heater on the temperature by warm-air blow temperature sensor, characterized in that it has a heater on the temperature switch setting unit The hot air mat system according to claim 1. The calculation formula for obtaining the heater off temperature T _of is: T _of = α × warm air set temperature T _st + β (θ−), where the unit of temperature is ° C., α and β are coefficients, and θ is the unit of temperature (° C.). 3. The hot air mat system according to claim 1, wherein the hot air mat system is given by an equation of the outside air temperature T _e ). The coefficients α and β of the calculation formula for obtaining the heater off temperature T _of are coefficients α = 1.5 and β = 2.5, the constant θ is θ = 27 ° C., the upper limit temperature T _up is 80 ° C., the lower limit temperature _{T dw} as 45 ° C., warm air mat system of claim 3, wherein the obtaining a temperature value within the range of heater off temperature _{T of} the 80 ≧ _{T of} ≧ 45. Hot air temperature control means, when the outside air temperature T _e detected by the outside air temperature detection sensor is higher than the hot air setting temperature T _st is the wind by rotating the fan is not heater in a state that turns off the heater The hot air mat system according to any one of claims 1 to 4, further comprising a control configuration for supplying the hot air jet pipe. A hot air mat provided with a hot air jet pipe having a hot air jet hole, a fan as a wind supply source, a heater for heating air blown from the fan, and the air heated by the heater When the temperature of the hot air supplied from the hot air supply pipe and the temperature of the hot air discharged from the hot air outlet reaches the target off-temperature of the heater, the heater is turned off, and the heater lower than the target off-temperature Hot air temperature control means for controlling the hot air temperature to be set to a preset hot air temperature T _st by driving the heater on at an on temperature to control the hot air temperature ejected from the hot air ejection hole. in wind temperature control method of the mat system, the outside air temperature T _e, is heated to detect a hot air temperature T _h which is sent from the heater by a heater, warm air temperature the hot air injection ports sent from the heater At the position where it is ejected from A heater sending hot air temperature for the target off temperature of over motor, the hot air setting temperature T _st, calculated as heater off temperature T _of based on pre-given arithmetic expression including a detection outside air temperature T _e to variable values , and configured to turn off driving the heater when the detected temperature T _h of the warm air delivered from the heater reaches the heater off temperature T _of, heater oFF drive is ejected from the warm-air blow hole of the warm-air blow pipe The temperature control of the hot air mat system is characterized in that the control is based on the detected temperature of the hot air sent from the heater and the set temperature of the hot air without using the value directly detecting the temperature of the hot air generated Method.

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