JPH03213916A - Temperature control device of electric heater for floor - Google Patents

Abstract

PURPOSE:To perform temp. control of a plurality of heat generating elements on a batch operation basis by comparing an output signals and set temp. signals of a selecting device being connected with a plurality of temp. detectors and perform ON/ OFF operations of an electric current limiters. CONSTITUTION:A temp. detector 3 which outputs temp. signal in accordance with a generated temp. and a selecting device 5 which outputs temp. signals outputted from a plurality of temp. detectors 3 with time intervals of preset time length sequentially, are connected to a plurality of heat generating elements 1 each having a plurality of heat generating parts 1a respectively. Further, the signals selected by the above selecting device 5 and the set temp. signals inputted by a temp. setting device 9 are compared with each other, and a comparator 7 which outputs the compared signals is connected to a current limiter 11 which serves as a switching means. In this way, when a selected signal outputted from the selecting device 5 shows a temp. value higher than the set temp. signal, the selecting device 5 outputs a signal commanding the current limiter 11 to be OFF, and if said compared signal is contrary to the above, a signal commands the current limiter to be ON. As a result, a plurality of heat generating elements 1 are enabled to perform ON/OFF operations of a current on a batch basis.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a temperature control device for electric floor heating used to control the temperature of a plurality of independent heat generating elements.

[Prior Art] Some conventional temperature control devices for electric floor heating include a heat generating element installed on the floor surface of a room and heating the room while controlling the temperature of the heat generating element. The heating element incorporates a heating section such as a heater wire. The heating element requires a large area because it is installed to fit the area of the floor in the room. For this reason, the heat generating element is constructed by combining a plurality of heat generating elements formed in a panel shape on the floor of the room. Each heat generating element is usually a combination of standardized heat generating elements having a size equivalent to one tatami mat and is installed on the floor. Among the heat generating elements, the negative heat generating elements have a heat generating part and a temperature detection part for detecting the temperature of the heat generating part incorporated therein.

This heat generating element is called the parent panel. The other heat generating elements each incorporate a heat generating section and an overtemperature rise preventer. These heat generating elements are called child panels.

Each heat generating element uses a temperature detection section to detect a temperature signal corresponding to the temperature of the heat generating section of the main panel, and the temperature control device simultaneously controls the temperature of the main panel and the child panel.

Further, as another example of a control device for electric floor heating, there is one in which a heat generating part and a temperature detecting part are incorporated in each heat generating element, and the temperature of each heat generating element is individually controlled.

[Problems to be Solved by the Invention] However, in the above-mentioned electric heating control device in which the temperature detection section is incorporated in the main panel, the temperature detection section only detects the temperature of the main panel. In other words,
If the other sub-panels are covered with a futon or the like, the temperature of that part will continue to rise because the sub-panels do not have temperature detection parts, creating a risk of fire or the like.

Also, if you place a futon directly on top of the child panel, the futon on top of the child panel will become hot and difficult to use.On the other hand, if you place a futon on top of the parent panel, the temperature sensor will Since the temperature is detected, the temperature of each child panel drops, causing problems with indoor heating.

On the other hand, in the above-mentioned electric heating device in which a temperature detection section is built into each heat generating element, the shape of the temperature controller with a built-in temperature control device is limited because it requires temperature control circuits for the number of heat generating elements. In addition to increasing the size, the manufacturing cost also increases.

Therefore, an object of the present invention is to provide a temperature control device for electric floor heating that can collectively control the temperature of a plurality of heat generating elements using one temperature control device.

[Means for Solving the Problems] According to the present invention, a plurality of independent heat generating elements, a plurality of temperature detection means each outputting a temperature signal according to the temperature of the plurality of heat generating elements, and a selection means that sequentially selects the temperature signals from the detection means at regular time intervals and outputs a selection signal corresponding to the selected temperature signal; a temperature setting means that outputs a set temperature signal representing the set temperature; Comparing means for comparing the selection signal and the set temperature signal and outputting a comparison signal, and switching means for collectively turning on/off current to the plurality of heating elements based on the comparison signal. A temperature control device for electric floor heating with characteristics can be obtained.

[Embodiment] FIG. 1 shows a temperature control device for electric floor heating according to an embodiment of the present invention.

The illustrated temperature control device for electric floor heating controls the temperature of a plurality of heat generating elements 1 that are independent of each other. Each heat generating element 1 has a plurality of heat generating parts 1a.

As the heat generating portion 1a, a cord-shaped heater wire or a film-shaped heater made by performing conductive printing on a film is used. Heat generating part 1a
is fixed by sandwiching it between felt or other cloth. Each heat generating section 1a is a combination of independent heat generating elements 1 connected in parallel to each other. Note that each heat generating section 1a may constitute an independent circuit.

Each heat generating element 1 is provided with a temperature detection device 3, respectively. The temperature detection device 3 is located near each heat generating part 1a, and outputs a temperature signal corresponding to the temperature of the heat generating element 1, respectively. Further, as the temperature detection device 3, a temperature sensor made by applying conductive printing on a cord-shaped sensor wire or film is used.

Each temperature sensing device 3 is connected to a selection device 5. The selection device 5 sequentially selects temperature signals from the plurality of temperature detection devices 3 at regular time intervals and outputs a selection signal corresponding to the selected temperature signal. This selection device 5 is connected to a comparison device 7 that compares the value selected by the selection signal with a set temperature signal representing the set temperature and outputs a comparison signal.

Further, the set temperature signal is transmitted from the temperature setting device 9 to the comparison device 7.
is input. The comparison device 7 is connected to a current limiter 11 as switching means. As the current limiter 11, a relay or the like is used.

The current limiter 11 is connected via the heating element 1 to a power supply circuit 13 connected to a commercial power source. This power supply circuit 13
A power plug 15 is connected to.

When the selection signal output from the selection device 5 indicates a higher temperature than the set temperature signal output from the temperature setting device 9, the selection device 5 issues a signal to turn off the current limiter 11. Conversely, when the temperature signal output from the selection device 5 indicates a lower temperature than the set temperature signal output from the temperature setting device 9, the selection device 5 generates a signal for turning on the current limiter 11 as a comparison signal.

When the current limiter 11 is turned off, all of the plurality of heat generating elements l are disconnected from the power supply 13.

On the other hand, when the current limiter 11 is turned on, all of the plurality of heat generating elements 1 are connected to the power source 13.

In this way, current can be turned on and off to the plurality of heat generating elements 1 all at once. Therefore, it is possible to control all of the plurality of heat generating elements 1 to the same temperature using one temperature control device.

According to this electric heating control device, when the heating element 1 is covered with a futon or the like, the temperature of that area is detected by the temperature detection device, and temperature control is immediately performed. Therefore, the temperature of the heat generating element 1 can be maintained at or near the set temperature of the temperature setting device 9.

Note that the temperature setting device 9 may be one that is installed in a microcomputer and transmits a setting reference signal to the comparator 7 from the microcomputer.

[Effects of the Invention] As explained above with reference to the embodiments, according to the present invention, temperature can be controlled with one temperature control device regardless of the size of the heating element, so the shape of the temperature controller can be downsized and the manufacturing cost can be reduced. can be reduced.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a temperature control device for electric floor heating according to an embodiment of the present invention. 1; Heat generating element, 1 Heat generating section, 3; Temperature detection device, 5; Selection device, 7; Comparison device, 9; Temperature setting device, 11; Current limiter.

Claims (1)

[Claims] 1. A plurality of independent heat generating elements, a plurality of temperature detection means each outputting a temperature signal according to the temperature of the plurality of heat generation elements, and temperature signals from the plurality of temperature detection means are sequentially output at fixed time intervals. A selection means that selects and outputs a selection signal corresponding to the selected temperature signal, a temperature setting means that outputs a set temperature signal representing the set temperature, and a comparison between the selection signal and the set temperature signal. A temperature control device for electric floor heating, characterized in that it is provided with a comparison means for outputting a signal, and a switch means for collectively turning on and off the power of the plurality of heat generating elements based on the comparison signal.