JPH0140158Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wireless temperature probe used for cooking in a microwave oven or the like.

When cooking food, controlling the finishing temperature is important. Especially when cooking with a microwave oven, its characteristic is the speed of heating.
It is difficult to understand the correlation between heating time and finishing temperature. Therefore, various sensors have been used in the past. The main methods include a method of indirectly determining the food temperature by detecting gas components, water vapor, infrared rays, etc. emitted from the food, and a method of directly inserting a sensor probe into the food. However, with the former, it is difficult to accurately know the temperature inside the food, and with the latter, although there is no problem with temperature accuracy, it is difficult to use because it involves a lead wire that connects the probe to the heating control device outside the cooking chamber. Both methods have their advantages and disadvantages.

The present invention has been devised in view of the above-mentioned points with the purpose of providing a wireless temperature probe that is easy to use.

Hereinafter, the present invention will be explained in detail based on the embodiments shown in the drawings. In Figs. 1 and 2, a temperature probe A according to the present invention has a needle part B inserted into a food to be cooked D.
and a gripping part C connected to the needle part B. The needle part B is manufactured by a sheathed protective tube, and the lower end b thereof is equipped with a helical bimetal 1 as an example of a temperature sensing element, and the lower end 1a of the bimetal is fixed to the inner surface of the needle part B. There is. The gripping portion C includes a case 2 having a hat-shaped cross section;
a ring 3 fixed to the upper end of the case 2; a glass lid 4 fitted to the upper end of the ring 3; and a holder for fixing and holding the upper end of the needle B to the central hole of the lower wall of the case 2. It is composed of a cylinder 5. Furthermore, the gripping portion C
is equipped with a temperature setting device E for setting the cooking temperature, and the device E includes an external knob 7 rotatably supported on the side wall of the case 2 by a horizontal shaft 6, and a temperature setting device E fixed to the inner end of the horizontal shaft 6. a small gear 8, a temperature setting ring 10 rotatably fitted to the side surface of the case 2 with a large gear part 9 on the lower surface engaged with the small gear 8, and a temperature scale fixed to the upper end of the case 2. plate 11 and the scale plate 1
1 and a temperature setting pointer 13 that passes through an arcuate hole 12 and has a lower end fixed to a ring 10.
Furthermore, a transmitting device F is attached to the gripping portion C, which transmits a signal when the temperature of the temperature sensing element reaches a set temperature. , a bearing 15 that rotatably supports the main shaft 14 on the needle B and the case 2.
, a keypad 17 with a claw 16 fixed to the top of the main shaft 14, a temperature pointer 18 fixed to the upper end of the main shaft 14, and a temperature setting pointer at the outer end with the inner end facing the rotation path of the claw 16. 13 and a transmitter 19 made of a tuning fork, a vibrating piece, or the like having a natural frequency fixed to the ring 10 at the same position. 20,
21 is waterproof packing. In addition, probe A
The structure is said to be sufficiently resistant to microwave sealing.

FIG. 4 is a configuration diagram of a microwave oven equipped with the probe, and in this figure, a heating control device H installed outside the cooking chamber G of the microwave oven is
A receiver J consisting of a microphone, an amplifier K for amplifying the received signal, a bandpass filter L for removing noise components from the output, a temperature key M and a time key N for determining the signal components of the output. and a control section P that turns on and off the power supply Q of the magnetron R based on the following.

Next, to explain the operation, first grasp the case 2 of the gripping part C of the probe A with one hand, rotate the external knob 7 with the other hand, and rotate the small gear 8 and the large gear part 9.
The temperature is set by rotating the temperature setting ring 10 via the , and setting the temperature so that the pointer 13 points to the desired scale on the scale plate 11. Next, holding the grip part C, insert the needle part B into the food to be cooked D, and insert it into the cooking chamber G of the microwave oven.
Set inside. Next, if you want to finish cooking when the food D reaches the set temperature, press only the temperature key M, or if you want to continue heating while maintaining the temperature after reaching the set temperature, press the temperature key M and the timer. After pressing both keys N, press the cooking start key S. Then, the food D is heated by the operation of the magnetron R, and the temperature is transmitted to the bimetal 1 in the needle part B. As the temperature rises, the bimetal 1 deforms in a direction in which the number of helical turns decreases, and the main shaft 14, the temperature pointer 18, and the keystroke 17 is rotated clockwise in FIG. Move away from the transmitter 19. That is, the oscillator 19 that is pressed at this set temperature emits sound at a predetermined natural frequency. This sound is received by a receiver J consisting of a microphone, amplified by its output amplifier K, noise components are removed by a filter L, and determined by a control unit P, and whether the power supply Q of the magnetron R is turned off or not. Alternatively, it is turned off after the input time of the time key N has elapsed.

In addition, in the above probe, when the bimetal 1 in the needle part B cools and deforms in the direction of increasing the number of helical turns, the pawl 16 of the keystroke 17 rotates counterclockwise in FIG. Since the probe also makes a sound when the temperature drops below the temperature below, the above-mentioned probe can be used for other cooking such as cooling cooking using this characteristic.

As is clear from the above description, the temperature probe of the present invention has a temperature sensing element built into the needle inserted into the food to be cooked, and a grip part connected to the top of the needle.
It is equipped with a temperature setting device and a transmitting device that sends a signal when the temperature sensing element reaches the set temperature.
According to the present invention, it is possible to provide a wireless temperature probe, which can accurately determine the internal temperature of food and is easy to use. Further, according to the present invention, the transmitting device has a key with a claw that rotates due to mechanical deformation due to a temperature change of the temperature-sensitive element, and a key with an inner end facing the rotation path of the claw. Since the transmitter itself does not consist of electrical parts, its construction is simple and has excellent heat resistance, making it especially suitable for use in cooking rooms that are heated to high temperatures. has an effect that is said to be optimal.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a partially cutaway perspective view with the glass lid removed, Fig. 2 is a vertical sectional view, Fig. 3 is a plan view of the transmitting part, and Fig. 4. is a configuration diagram of a microwave oven. A: Temperature probe, B: Needle part, C: Grip part,
D: Food, E: Temperature setting device, F: Transmission device,
J: Receiving device, 1: Bimetal as an example of temperature sensing element, 7: External knob, 10: Temperature setting ring,
13: Temperature setting pointer, 14: Main shaft, 16: Claw, 1
7: Keystroke, 19: Transmitter.

Claims (1)

[Scope of utility model registration request] It consists of a needle that is inserted into the food to be cooked, and a grip that is connected to the needle, and the needle is equipped with a temperature-sensitive element that mechanically deforms in accordance with temperature changes.
A temperature setting device for setting the cooking temperature and a transmitting device that transmits a signal when the temperature of the temperature sensing element reaches the set temperature are attached to the gripping portion, and the transmitting device A wireless temperature probe for cooking, comprising: a key with a claw that rotates by mechanical deformation; and a transmitter that has an inner end facing the rotation path of the claw and emits a sound wave at a natural frequency when the key is pressed.