JPH0659795U - Electric infrared heating device - Google Patents

Abstract

(57) [Abstract] [Purpose] In addition to making it possible to perform the best drying process for the painted surface of an automobile by an electric infrared heating machine in a short time, the heating machine can be used in a narrow place without any trouble. Eggplant [Structure] A control device 7 for controlling power supply to an electric infrared heater 1 for supplying electric power to a surface of a car, such as a painted surface, which needs to be heated. The control device receives the signal emitted from the sensor 17 which detects the temperature of the object to be heated such as the painted surface and holds the temperature of the object to be heated at an arbitrary constant value. Behave like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric infrared heating device used when heating a painted surface of an automobile or the like.

[0002]

[Prior art]

 There is already an electric red line heating machine that is provided with a plurality of heating rods in front of an infrared reflecting plate and that can direct the infrared rays emitted from the heating rods directly or by the reflecting plate to reach a coated surface. ing.

When using this heating device, generally, a sufficient distance, for example, at least about 1 m or more is separated from the coated surface so that the temperature of the coated surface to be dried does not exceed a certain temperature, for example, 60 degrees Celsius. It is placed and dried for a long time (about 1 hour).

[0004]

[Problems to be solved by the device]

 As described above, it is necessary to secure a sufficient distance between the conventional heating machine and the painted surface in order to avoid an excessive temperature rise on the painted surface, but this cannot be done due to space restrictions in some workplaces. is there.

Further, if the heater is heated sufficiently away from the coated surface to heat the coated surface, it takes a long time for the temperature of the coated surface to rise to reach an equilibrium state, and rapid processing cannot be performed.

In order to solve this, it is conceivable to bring the heater close to the painted surface as much as possible. However, doing so may raise the temperature of the painted surface excessively. It is necessary to perform detailed temperature control by moving the relative position to the heating device while detecting the temperature by holding the hand near the heating device and touching the painted surface.

An object of the present invention is to provide an electric infrared heating device which solves such a problem and can reasonably dry a coated surface.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, a control device for controlling the power supply to the electric infrared heating machine that radiates infrared rays to the painted surface of an automobile is installed in the power supply section. This control device is configured to operate so as to receive the signal emitted from the sensor that detects the temperature of the heated area such as the painted surface and maintain the temperature of the same area at an arbitrary constant value. .

At this time, it is preferable to provide a timer for automatically stopping the power supply to the electric infrared heater after a predetermined time set arbitrarily.

[0010]

[Action]

 Since the control device detects the temperature of the painted surface with a sensor and controls the power supply to the heating machine in relation to this detection signal, the heating machine heats it excessively even if the distance to the painted surface is short. No matter what, it will be heated and maintained at an arbitrary constant temperature. This means that the heating device of the present invention can be used without inconvenience with respect to the surface to be heated with a minimum distance between positions, and the surface to be coated is heated to the required temperature in the shortest possible time. The temperature shall be maintained appropriately.

[0011]

【Example】

 FIG. 1 is a diagram showing an embodiment of an electric infrared heating device according to the present invention, and FIG. 2 is an explanatory diagram showing an outline of an electric system of the heating device.

In the figure, reference numeral 1 is an electric infrared heater, and specifically, an infrared generating section 4 in which infrared heating electric heating rods 3 are horizontally arranged along a front surface of an infrared reflecting plate 2, It comprises a support leg 5 with casters for supporting this, and an electric power supply unit 6 for supplying electric power to the electric heating rods 3 ... In this case, the power supply unit 6 is configured such that a power supply plug 6b is attached to the tip of an electric cord 6a extended from the infrared generation unit 4.

A control device 7 for controlling power supply to the heating machine 1 is incorporated in the power supply unit 6, and specifically, the following is performed.

That is, a portable box body 8 is formed, on which an electromagnetic switch 9, a temperature adjusting circuit section 10, a temperature setting dial 10a, a timer section 11, a time setting dial 11a, a power source lamp 12, an output. An electrical outlet 15 and a female connector for sensor input 14a are provided, and an electric cord 15 is extended from the box body 8 and a power plug 16 is attached to the tip thereof. Then, the plug 6b is inserted into the outlet 13, and the female connector 14a is provided with a male connector 14b connected to a contactless sensor 17 for detecting the temperature of a heated object radiated with infrared rays from the heater 1. Make it plug in.

At this time, the electromagnetic switch 9 interrupts the power supplied from the power plug 16, and the temperature adjusting circuit unit 10 sets an arbitrary reference temperature with the temperature setting dial 10a. It is assumed that the electromagnetic switch 9 is appropriately opened / closed in association with the input signal from the contact type sensor 17, and the timer unit 11 automatically operates after a certain period of time arbitrarily set by the time setting dial 11a. The electromagnetic switch 9 is not opened, and the power lamp 12 is only turned on when power is being supplied to the temperature adjusting circuit section 10.

However, the contactless sensor 17 may be a direct type sensor that directly receives the infrared rays emitted from the electric heater 1 at the position of the object to be heated or after being reflected by the object to be heated. It may be an indirect type that receives infrared rays.

When the direct type is used, for example, as shown in FIG. 1, the sensor main body 17 a is connected to the central portion of the front surface of the infrared ray generating section 4 through a support rod device 18 on which an extendable and retractable portion 18 a is formed. To position it.

On the other hand, when the indirect type is used, for example, the sensor main body 17b is located behind the reflection plate 2 as shown by a phantom line in the figure, and the through hole 2a provided in the reflection plate 2 is passed through. The infrared rays reflected by the object to be heated are detected.

An example of the use of the device of the present invention configured as described above and its operation will be described. For example, immediately after painting an automobile, the heating device 1 is positioned so as to radiate infrared rays on the coated surface as a heated body. And make the necessary preparations.

The distance between the coated surface and the heater is set to a shorter dimension than the conventional one, for example, a distance of about 30 cm.

When a direct type sensor is used as the non-contact type sensor 17, the operator adjusts the length of the expandable / contractible portion 18 so that the infrared ray generating section 4 of the heater 1 and the sensor body 17a. Is adjusted so that it is almost the same as the distance between the infrared ray generating section 4 and the painted surface. As a result, the sensor body 17a can directly receive the infrared rays radiated by the heater 1 to judge the temperature of the coated surface.

On the other hand, when an indirect sensor is used as the non-contact sensor, the distance between the sensor main body 17b and the painted surface is inevitably determined at the same time as the heater 1 is installed. Is unnecessary.

Further, the planned heating temperature of the coated surface is set to an appropriate constant temperature (for example, 60 degrees Celsius) according to the paint on the coated surface by operating the temperature setting dial 10a, and the coated surface is heated as necessary. A time (for example, 40 minutes) considered to be necessary for drying is set by the time setting dial 11a.

Thus, when the apparatus is in the operating state, the heater 1 emits infrared rays to heat the painted surface from a close position, and the sensor 17 constantly detects the temperature of the painted surface and the temperature adjusting circuit section. Input a signal to 10. The temperature adjustment circuit section 10 compares the signal from the sensor 17 with the set temperature set by the temperature setting dial 10a, and when the temperature of the coated surface becomes higher than the set temperature, the electromagnetic switch 9 is opened. On the contrary, when the temperature of the coated surface becomes lower than the set temperature, the switch 9 is closed and ON / OFF control is executed to keep the coated surface at a constant temperature, for example, 60 degrees Celsius. Will be things.

However, the timer unit 11 automatically opens the electromagnetic switch 9 after a lapse of a certain time (for example, 40 minutes) from the start of heating and ends the operation of the heater 1. Note that the heating machine 1 can be stopped manually.

In Table 1, the sensor 17 is a direct type, the distance between the heater 1 and the painted surface is set to 30 cm, and the heating start in the case where the temperature setting dial 10a is set to 60 degrees Celsius and the heating is started. It shows the relationship between the elapsed time afterwards and the temperature of the painted surface, and it is done for three types when the painted surface is white, gray, or black.

[0027]

[Table 1]

Further, Table 2 shows the relationship between the elapsed time after the start of heating and the temperature of the coated surface in the case where the sensor 17 is an indirect type and the experiment is the same as the previous experiment except that the sensor 17 is the indirect type. Is.

[0029]

[Table 2]

As is clear from these tables, the coated surface reaches the planned heating temperature 5 to 10 minutes after the start of heating, and the temperature is maintained thereafter. This is much shorter than the time required for temperature equilibration (about 20 minutes), which was required to reach the planned heating temperature in the past, and it helps to improve the efficiency of the drying operation. Is.

For reference, Table 3 shows the relationship between the elapsed time after the start of heating and the temperature of the coated surface when the control device 7 is set in the inoperative state in the experiment of Table 1. According to this, it can be seen that the coated surface reaches 60 degrees Celsius or higher in 5 to 10 minutes after the start of heating, and becomes overheated.

[0032]

[Table 3]

[0033]

[Effect of device]

 According to the present invention configured as described above, since the temperature is controlled to a stable constant temperature regardless of the distance between the object to be heated and the heater, the heater can be applied to the object to be heated such as a painted surface. Since it is possible to place them as close as possible to each other with peace of mind, it is possible to immediately reach the required heating temperature on the coated surface, etc., and to maintain that temperature effectively thereafter, such as drying. In addition to being able to perform quickly and accurately, it is possible to dry without any problem even in a small work space. In the present invention, the object to be heated is not limited to the painted surface but can be applied to other heating and drying.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an electric infrared heating device according to the present invention.

FIG. 2 is an explanatory diagram showing an outline of an electric system of the heating device.

[Explanation of symbols]

 1 Electric Infrared Heater 6 Power Supply 7 Control Device 17 Sensor

Claims (2)

[Scope of utility model registration request] 1. A control device for controlling power supply to an electric infrared heater, which is designed to radiate infrared rays to a surface of a vehicle, such as a painted surface, which is required to be heated. This control device is characterized by a configuration that inputs a signal emitted from a sensor that detects the temperature of a heated area such as a painted surface and maintains the temperature of the same area at an arbitrary constant value. Electric infrared heating device. 2. The electric infrared heating apparatus according to claim 1, further comprising a timer for automatically stopping the electric power supply to the electric infrared heating machine after an arbitrarily set constant time. .