JPH0159708B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric carpet that provides a constant feeling of heating and that saves energy.

In conventional electric carpets, the surface temperature is controlled by on/off control with some differential, plus or minus, relative to the set temperature selected according to the user's preference. Ta. In this case, the conductive heat and radiant heat that the human body receives from the carpet changes regularly with a certain period. Furthermore, if the period is long or the differential is small, the surface temperature can be considered to be constant over time. Conventionally, various techniques have been developed for temperature control of heating equipment with the aim of reducing deviation from a set temperature. However, the human body gets accustomed to periodic or constant stimulation (temperature), so even if it is comfortable for a short time after starting to use it, the heater will soon be turned off and the setting temperature will be raised higher. Often feels satisfied. As a result, there have been problems in that more power is consumed than necessary, and the set temperature must be changed frequently in order to eliminate the reduction in the number of heaters due to habituation.

In order to solve these problems, the purpose of the present invention is to vary the surface temperature with the set temperature as an average, and to increase the amount of heat generated by the heater so that the power spectrum is inversely proportional to the frequency of the temperature fluctuation. To provide an electric carpet that reduces the need to get used to the temperature and always provides a comfortable feeling of heating by controlling the temperature.

Note that the power spectrum here refers to analyzing the power of temperature change over all frequencies to see how much temperature change power is concentrated on which side of the frequency. (Iwanami Course Fundamental Engineering 3 Established Statistical Phenomena (1968) Taki, Kaya, Miyagawa, Sekine p.210-p.217) Next, the electric carpet according to the present invention will be explained based on an example. FIG. 1 is an external view showing one embodiment of an electric carpet according to the present invention.
is the electric carpet body, and 2 is its controller. Figure 2 shows a sectional view of the main body, 3 is a heater,
4 is a temperature sensing element, 5 is a heat insulating layer, and 6 is a carpet cover. Figure 3 is a block diagram of the control circuit.
In addition to the temperature sensing element 4, it is comprised of a power spectrum converter 7, a reference comparator 8, a microcomputer 9, an amplifier 10, and a heater power source 11.

When heating is started in the above configuration, the temperature fluctuation signal taken in from the temperature sensing element 4 is frequency-analyzed by the power spectrum converter 7, and whether it is inversely proportional to the frequency of the temperature fluctuation (hereinafter referred to as 1/). It is determined by the reference comparator 8.
From the results, using microcomputer 9, the temperature fluctuation was reduced to 1/2.
Amplifier 10 generates a signal that controls the heater voltage to have a power spectrum proportional to
The heater power source 11 is controlled via the heater power source 11. In this way, the carpet surface temperature is given a variation with a power spectrum proportional to 1/.

It is known that fluctuations with a power spectrum of 1/ are closely related to human senses, and fluctuations in brain waves and heartbeat cycles have a power spectrum of 1/. In addition, the acoustic power of pleasant music and the power spectrum of frequency fluctuations are
It is proportional to 1/. Based on this fact, there are examples of effects being obtained by varying the strength and interval of the current applied to relieve pain such as neuralgia with a 1/power spectrum. In other words, 1/
Fluctuations with a power spectrum of
And it matches the rhythm of the senses. On the other hand, if the power spectrum of temperature change is constant regardless of frequency (completely irregular change), it is completely impossible to predict what kind of change will occur next, and the sensation becomes abrupt, which is unpleasant for the human body. Furthermore, if the power spectrum is inversely proportional to the square of the frequency, the changes will be slow and lack freshness, which will also be unpleasant.

Therefore, if the fluctuations in the surface temperature of an electric carpet are controlled to have a power spectrum of 1/1, the user will not get used to the temperature, the freshness will always be maintained, and the fluctuation will be such that the human body feels comfortable. Because it matches the rhythm of the air, a very comfortable heating effect can be obtained. In addition, there is no need to consume more power than necessary due to raising the set temperature too much after getting used to the temperature.

In this way, the temperature control method having a power spectrum of 1/1 can also be applied to controlling the surface temperature in other types of floor heating and radiant heating/cooling.

As explained above, the electric carpet according to the present invention detects the surface temperature and calculates the power and
Since the amount of heat generated by the heater is controlled so that the spectrum is proportional to 1/1, a fresh and comfortable heating effect can be obtained at all times, and energy savings can also be achieved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the electric carpet main body of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a block diagram of the control circuit. DESCRIPTION OF SYMBOLS 1...Electric carpet body, 2...Controller, 3...Heater, 4...Temperature sensing element, 7...Power spectrum converter, 8...Reference comparator, 9...Microcomputer, 10...Amplifier, 11...Heater power supply.

Claims (1)

[Claims] 1 A power spectrum converter that has a heater in the main body and is provided with a temperature sensing element that detects the surface temperature, and that analyzes the frequency of fluctuations in the signal from the temperature sensing element; a reference comparator that determines whether the power spectrum of the fluctuation of the signal from the thermal element is approximately inversely proportional to the frequency; and a control device that controls the amount of heat generated by the heater based on the determination result of the reference comparator. Electric carpet consisting of.