JPS61125617A - Temperature controller with temperature display device - Google Patents

Abstract

PURPOSE:To prevent a user's misunderstanding that only setting temperature means electric conduction to a heater by constituting the titled controller such that the temperature cannot be set before the conduction to the heater starts. CONSTITUTION:A latch means 12 is constituted of a flip-flop 14 for holding an output after the user operates a switch 13. A temperature setting means 15 is provided with an oscillator 17 for receiving and oscillating a signal which is transmitted after the user operates a switch 16. Thus the oscillator 17 cannot oscillate even when the user presses the switch 16 in order to set temperature, because the flip flop 14 is not latched: therefore temperature cannot be set.

Description

[Detailed description of the invention] Industrial applications Contains information related to temperature control devices.

2. Description of the Related Art As shown in FIG. 3, a conventional temperature control device of this type includes a heater 1 that heats the inside of a wooden casing (not shown) in which a person takes a bath, and a temperature control device that allows a user to set a temperature value. A temperature setting means 2 for outputting, a set temperature storage means 3 for storing and outputting the output of the temperature setting means 2, a temperature detecting means 4 for detecting the internal temperature of the casing, and an output of the temperature detecting means 4. and a comparator 6 that compares and outputs the output of the set temperature storage means 3, a launch means e that is operated by the user to hold the output, and outputs of both the latch means 6 and the comparator 6. Switching means 7 for energizing the heater 1 at the time
It was composed of. And in this configuration,
The user operates the switching means e to output an output, and also operates the switching means to energize the heater 1. As a result, the temperature inside the housing increases due to the heating system. The temperature detection means 4 detects this temperature and outputs it to the comparator 6.

This comparator 6 is controlled by the temperature setting means 2 by the user's operation.
The set value stored in the set temperature storage means 3 is compared with the output of the temperature detecting means 4, and if the set value is lower, the output is output to the switching means 7, which switches the output to the heater 1. Stop energizing. In this way, the temperature inside the housing is kept constant.

The problem that the invention aims to solve However, with this configuration, the user cannot.

Since the temperature can be set at any time even before the start means 6 is operated to energize the heater 1, the temperature can be set at any time even if the user has not operated the launch means 6 and started energizing the heater 1. Regardless, by operating the temperature setting means 2, there may be a misunderstanding that energization to the heater 1 has started. In particular, if there is a display such as a lamp on the temperature setting means 2 or the set temperature storage means 3, and the display changes when the user sets the temperature, there are many chances for the user to misunderstand, and malfunction when energizing the heater. There was little chance of it happening.

The present invention solves the above-mentioned problems, and aims to provide a temperature control device with a temperature display that can eliminate malfunctions that may occur due to temperature settings.

Means for Solving the Problems In order to solve the above problems, the present invention provides a heater that heats the inside of the casing, a latch means that is operated by the user to hold the output, and an output of the latch means. a temperature setting means that allows the user to output a temperature setting value only when the user is in use; a set temperature storage means that stores and outputs the output of the temperature setting means;
temperature detection means for detecting the internal temperature of the casing; a comparator for comparing and outputting the output of the temperature detection means and the output of the set temperature storage means; and switching means for energizing the heater.

Effects According to the above configuration, the user cannot set the temperature before starting to energize the heater, so when setting the temperature, the user will not mistakenly think that the heater has been energized, and as a result, the operation will be easier. Even people who are inexperienced can use it with confidence.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIGS. 1 and 2, 11 is a heater for heating the inside of a housing (not shown) in which a user takes a bath in a household electric sauna bath; 12 is a latch means; is constituted by a flip-flop 14 which operates a switch 13 to hold its output. 15 is a temperature setting means, and this temperature setting means 16 includes an oscillator 17 that oscillates in response to a signal sent by the user operating the switch 16 only when the flip 70 knob 14 is latched and outputting. ing.

18 is a set temperature storage means, and this set temperature storage means 18
A counter 19 counts the output of the oscillator 1A and outputs it digitally, and the output of this counter 19 is connected to D.
A D/A converter 21 is provided which converts the data into 1/person and outputs it to the comparator 2o. Reference numeral 22 denotes temperature detection means for detecting the internal temperature of the casing. We are prepared. Further, the comparator 2o compares the output of the temperature detection means 22 and the output of the D/A converter 21 in the setting storage means 18,
When the output of the D/A converter 21 is low, the output is stopped. 26 is a switching means, and this switching means 26 includes a gate 26 which outputs the output only when there is an output from the comparator 2o and the 7-lip flop 24, and this gate 2.
A transistor 27 that is turned on when 6 is output, a relay coil 28& controlled by the transistor 27, and a relay contact 28b that is closed by energizing the relay coil 28iL and energizes the heater 11. .

With the above configuration, if the flip-flop 14 is not latched, even if the user presses the switch 16 to set the temperature, the oscillator 17 cannot oscillate, and therefore the temperature cannot be set. In this case, the user
If you push the flip-flop 14 and output the flip-flop 14, the switch 16
By pressing , the oscillator 17 oscillates and the temperature setting value can be completely changed. And Furifubufuro, Fubu 14
, the gate 26 outputs an output, and the relay coil 281L is energized by turning on the transistor 2, the relay contact 28b is closed, and the heater 11 is energized. Due to this energization, the temperature inside the housing rises, and the output from the thermistor 23 and resistor 24 rises. When this output exceeds the set temperature output from the D/MU converter 21, the comparator 2o The output is stopped and the power supply to the relay coil 281L is cut off, thereby opening the relay contact 28b and stopping the power supply to the heater 11. When the power is turned off to the heater 11, the temperature inside the casing decreases, and the D/MU converter 2
The set temperature value output by the thermistor 23 and the resistor 24
When the temperature inside the case becomes higher than the temperature value outputted by
Then, the relay contact 2Bb is closed by energizing the relay coil 281L, and the heater 11 is energized. By performing such an operation, the temperature inside the casing is controlled to the set temperature.

Effects of the Invention As is clear from the above explanation, according to the present invention, the configuration is such that the user cannot set the temperature before starting to energize the heater. As a result, even if a setting display is provided for the temperature setting, the user will no longer be mistaken when the heater is energized. Since the temperature setting display can be attached, it is possible to set the temperature in an easy-to-understand manner, making it extremely convenient.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a temperature control device showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing a specific example of the temperature control device,
FIG. 3 is a block diagram of a conventional temperature control device. 11... Heater, 12... Latch means, 16... Temperature setting means, 18... Set temperature storage means, 20... Comparator , 22...
...Temperature detection means, 26...Switching means.

Claims (1)

[Claims] A heater that heats the inside of the casing, a latch means that is operated by the user to hold the output, a temperature setting means that allows the user to output a temperature set value only when there is an output from this latch means, and A set temperature storage means for storing and outputting the output of the setting means, a temperature detection means for detecting the internal temperature of the casing, and a comparison between the output of the temperature detection means and the output of the set temperature storage means and outputting the result. A temperature control device with a temperature indicator, comprising: a comparator; and switching means for energizing the heater according to the output of the comparator and the output of the latch means.