JPH0230742Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a temperature display device for displaying the current temperature, set temperature, heating time, estimated time to reach the set temperature, etc. in a temperature controller such as a cooking device or an air conditioner. It is.

Structure of conventional example and its problems Conventional temperature display devices for ovens and microwave ovens, for example, have a fluorescent display tube or a fluorescent display tube having bar-shaped display segments 1 to 16, as shown in FIG.
LEDs are used. In this case, the set temperature is 1, from the lowest temperature to the set temperature.
2, 4, to 11 are lit, and segment 3 of the bar corresponding to the current temperature is blinked. That is, in the case of FIG. 1, the set temperature is 200°C and the current temperature is 120°C. As the current temperature increases, the blinking segment moves to the right.

However, since the past state is not displayed, in other words, there is no temporal element at all, so
The big drawback is that you have no idea how fast the temperature is rising, and it's very difficult to know how long it will take to reach the set temperature. In particular, when cooking in an oven using a cooker, it is necessary to heat the heating chamber to the required temperature before placing food therein. In cases like this, it is very inconvenient, especially since you don't know how long you have to wait before you can use it.

Purpose of the invention The present invention is to eliminate the above-mentioned drawbacks of the conventional technology.It is equipped with a temperature measurement section and an operation time measurement section, performs arithmetic processing based on the data of both, and measures the temperature on the vertical and horizontal axes, respectively. By displaying the above calculation results on the coordinate axes with parameters corresponding to time, and simultaneously displaying the set temperature set by the temperature setting section on the display section, the user can It is an object of the present invention to provide a display device that allows the degree of change in temperature and the estimated time to reach the set temperature to be understood as approximate values. Further, the temperature may change over time in various ways depending on the state of the object to be heated. Therefore, in order to display this accurately, it was necessary to use something expensive and with a complicated drive circuit, such as a CRT or dot display, in order to be able to display all curves. It is an attempt to obtain a similar effect using an inexpensive segment-type display panel in which the shape of the curve is determined.

Composition of the Invention In order to achieve the above object, the temperature display device of the present invention includes a temperature measuring section that measures the temperature of a heating chamber or an object to be heated, a heating operation time measuring section that measures the heating operation time, and a setting. A temperature setting section for inputting the temperature, a display section for displaying a substantial straight line or curve on a coordinate plane with the time element and temperature element on the horizontal and vertical axes, respectively, and the data from the measurement section. It consists of a control unit that performs arithmetic processing, etc., and is configured to display the state of temperature change on the display unit, and has a time element on the coordinate axis, so it has the effect that the state of temperature change up to now can be clearly seen at a glance, This has the great effect of allowing you to quickly see how many minutes it will take to reach the set temperature just by visually following the graph display.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the drawings.

FIG. 2 is an external view of a household oven equipped with the temperature display device of the present invention. In Figure 2,
17 is a display section of the temperature display device according to the present invention, and 18 is a temperature setting section.

FIG. 3 is a block circuit diagram of the temperature display device of the above embodiment. A microcomputer 19 is an integrated circuit in which most of the functions of a stored program type computer are integrated.

20 is a thermistor. Thereby, the temperature to be measured is converted from resistance to voltage, which is A/D converted by the microcomputer 19, thereby forming a temperature measuring section. 21 is a pulse generator that generates pulses with a constant period, and microcomputer 1
9, and by counting this, a heating operation time measuring section is configured. Reference numeral 22 controls a heat source of the oven, such as an electric heater, and is controlled by the microcomputer 19. Note that the power supply circuit is omitted in the figure.

17 is a display section, which is preferably a relatively large display such as a liquid crystal display panel, a plasma display panel, an electroluminescent display, or a CRT, but it can be constructed by arranging a large number of LEDs, etc. be able to.

In any case, it may be of any type as long as it can display display contents as described later.

In FIG. 4, a liquid crystal display panel is used as a display section, and there are 23 to 38 display segments as shown in the figure. 23 is a straight line representing the horizontal axis of the coordinate plane, and 24 is the vertical axis. 2
5, 26, and 27 are numerical display portions of segments (seven pieces) for indicating the set temperature, 28 and 29 are characters indicating units, and 30 is a broken line display indicating the position of the set temperature. 31 and 35 are characters indicating the unit, 32 is a letter indicating that the number displayed below is the remaining time, and 34 and 36 are segments for indicating the number.

37 and 38 are display segments divided into short lines, which are arranged to show a temperature increase curve.

FIG. 4 shows an intermediate display during heating operation set at 235°C.

25, 26, and 27 display the set temperature "235" set by the temperature setting section 18,
A broken line 30 extending to the right indicates the position of the set temperature on the coordinates. The segment group 37 shown in black indicates the course of temperature rise up to the present. This temperature is calculated based on the measurement result of the temperature measuring section and the data from the heating operation time measuring section. 38 is a segment that is not lit yet, and as the temperature rises, it will be lit sequentially from the left.

In this case, segment 3 showing the temperature rise curve
Since the numbers 7 and 38 are fixed as segments, they do not exactly match the scales (not shown) of the horizontal and vertical axes. Therefore, it is complicated to determine which segments to light up, but it is only necessary to make an appropriate selection and perform arithmetic processing depending on whether the temperature or time is important depending on each application. In the example shown in the figure, the set temperature is reached at point 39, so the set temperature at this point, 235° C., is used as a standard and is displayed as 5° C. per segment. Therefore, the display in the figure shows that the temperature is currently 205℃.

Furthermore, the microcomputer 19 calculates the temperature rise value per unit time based on the data from the temperature measurement section and the data from the heating operation time measurement section, and calculates the time required to reach the set temperature from the result. The prediction is made and displayed at 34 and 36 as "XX minutes and seconds left."

In this way, temperature changes are displayed together with the time element in the coordinate system, which makes it very easy to understand the state of temperature changes, which is very convenient.

Further, even if a liquid crystal display panel with a predetermined display position is used, the object of the present invention can be sufficiently achieved as described above, and the cost is low.

Effects of the invention As described above, according to the invention, (1) Since the temperature of the heating chamber, etc. is displayed together with the time element, temperature changes can be intuitively understood.

(2) Past and present temperatures are displayed almost continuously, making it easy to predict the future.

(3) The graphic display makes it easy to use even for elderly people who have difficulty reading numbers.

(4) By displaying temperature changes in advance in segments with a limited number and location,
There is no need to use a complicated and expensive display device such as a CRT, and an inexpensive display element such as a liquid crystal panel can be used.

It has many effects such as.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing the display section of a conventional temperature display device, Fig. 2 is an external perspective view of a household oven that is an embodiment of the present invention, Fig. 3 is a block diagram of the main parts, and Fig. 4 FIG. 1 is a configuration diagram of a display section showing an embodiment of the present invention using a liquid crystal display panel. 17...Display section, 18...Temperature setting section, 19...
...Microcomputer, 20...Thermistor,
21...Pulse generator.

Claims (1)

[Scope of utility model registration request] a heating chamber, a curve display section that is made up of a plurality of display segments and displays a curve of a substantially predetermined constant shape, and a set temperature set by a setting section described later is displayed by a plurality of segments that indicate numbers. A display panel consisting of a set temperature numerical display section, a remaining time numerical display section consisting of a plurality of segments that displays the remaining time until the set temperature is reached, and the arrival of the heating chamber or the heated object placed in the heating chamber. a setting section that sets the temperature; a temperature measurement section that measures the temperature of the heating chamber or the temperature of the object to be heated; a heating operation time measurement section; and the setting section;
Based on the data from the temperature measurement section and the heating operation time measurement section, the remaining time until the set temperature is reached is calculated, and the display panel displays the set temperature, the remaining time, and the change in temperature over time. The display panel includes a control section that displays the corresponding segment, and the display panel has the curve display section approximately in the center, a set temperature numeric display section and a remaining time numeric display section at the left end and the bottom end, respectively.
A temperature display device with temperature and time scales printed on the surface of the display panel.