JP2714568B2 - Aquarium heater for aquarium fish - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a heater unit having a water temperature heating electric wire for increasing the water temperature in an ornamental fish tank and a water temperature detecting sensor for detecting the water temperature in the water tank. The present invention relates to a heater device for an aquarium fish tank, comprising: a control unit for performing heat radiation by a water temperature heating heating wire on condition that a detection temperature of a water temperature detection sensor is lower than a preset temperature.

[0002]

2. Description of the Related Art Conventionally, heater devices used in aquarium fish tanks include a device in which a heater and a water temperature control unit are integrated, and a device in which a commercially available heater is connected and used.
When the temperature of the water is lower than a set temperature, these devices unconditionally heat a heater installed in the water to control the temperature to a temperature suitable for fish. When the heater and control unit are an integrated thermostat, the configuration of the heater unit consists of a ceramic tube as the outer tube, a water temperature sensor,
Heating wire is enclosed.

[0003]

The conventional heater device is based on the premise that the heater is placed in the water, so that even if the water in the water tank runs out, the heating is continued, and the heater is in an empty-fired state. The heater unit gets very hot.

[0004]

Therefore, the heater device (1) for an ornamental fish tank according to the present invention includes a heat source and a disaster prevention temperature sensor (for example, the disaster prevention sensor 11) in a heater unit (5). Thermal connection (for example, thermal coupling plate 13
And connected via a heat guide plate 14), and also detects a disaster prevention state in which the temperature detected by the temperature sensor for disaster prevention becomes higher than the temperature detected by the sensor for detecting water temperature (for example, the sensor 10 for water temperature). (For example, a disaster prevention sensor circuit 26).

With this arrangement, when both the water temperature detection sensor and the disaster prevention temperature sensor are underwater, the disaster prevention state detecting means does not detect the disaster prevention state. However, when the heater unit is in the air, the disaster prevention state detection means does not detect the disaster prevention state. Since the heat of the heat source thermally connected to the temperature sensor is less likely to be dissipated, the temperature detected by the disaster prevention temperature sensor increases, and the disaster prevention state detection means detects the disaster prevention state.

The heat source that is thermally connected to the disaster prevention temperature sensor in the heater unit may be a heating wire for heating water temperature (for example, heating wire 16), or provided that the power supply of the apparatus is in an on state. A preheating resistor (for example, a preheating resistor 12) that is always energized may be used.

[0007] Further, a power supply cutoff means (for example, a trigger circuit 27 and a triac 28) may be provided which cuts off power supply to the water heating wire based on the detection of the disaster prevention state by the disaster prevention detection means. And a disaster prevention state notification means (for example, an alarm indicator light 2)
2) may be provided.

Further, a heat source provided in the heater unit may be covered with a heater cover (8) to prevent a person from directly touching the heated heat source.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a heater device for an aquarium fish tank according to the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the heater device 1 includes a control unit 2, a power plug cord 3, a connection cord 4, and a heater unit 5.

The control unit 2 includes a temperature setting dial 2
1, an alarm indicator lamp 22 and a heater power indicator lamp 23 are provided.

The outside of the heater unit 5 placed in the ornamental fish tank is covered with a heater cover 8 so that a person does not directly touch the heating unit 6. Further, the inside of the heater unit 5 includes a heating unit 6 and a sensor unit 7 and is sealed in a ceramic tube 17.

The sensor section 7 has a sensor board 9 on which a water temperature sensor 10 and a disaster prevention sensor 1 are mounted.
1. A preheating resistor 12 insulated by a glass tube is incorporated. There is a thermal coupling plate 13 surrounding the outside, and good thermal coupling can be expected by soldering a part of the disaster prevention sensor 11. On the other hand, the mica tube 15 is placed outside the heating wire 16 of the heating section 6.
The heat guide plate 14 is inserted in a state where the heat guide plate 14 is sandwiched between the ceramic tube 17 and the ceramic tube 17 so as to completely overlap the heat coupling plate 13 of the sensor unit 7. As a result, the preliminary heating resistor 12
Is thermally connected to the disaster prevention sensor 11 together with the heating wire 16.

In the water, the water temperature is controlled by judging the signal of the water temperature sensor 10 and driving the triac 28 through the trigger circuit 27 to control the heating wire 16. At this time, since the heat guide plate 14 and the heat coupling plate 13 are placed along the inner wall of the ceramic tube 17, the disaster prevention sensor 11 is dissipated into water and almost shows the water temperature. 26 is turned off.

On the other hand, when the heater unit 5 is exposed to the air, the heat generated from the heating wire 16 and the preheating resistor 12 is not dissipated due to the absence of water, and the disaster prevention sensor 11 rapidly becomes hot. Therefore, by comparing this temperature with the temperature of the water temperature sensor 10, the disaster prevention sensor comparison circuit 26 is turned on, and the disaster prevention state is detected. As a result, the power supply to the triac 28 is cut off through the trigger circuit 27 and the alarm indicator 2
Disaster prevention operation such as notifying a person by emitting light 2 is performed.

The preheating resistor 12 functions as a heat source for preventing the temperature from dropping again after the heater unit 5 enters the disaster prevention operation state and the power supply to the heating wire 16 is cut off. . At the same time, control unit 2
And is used to obtain a power supply current.

The connection cord 4 connecting the control unit 2 and the heater unit 5 is desirably a multi-core cable having a two-core shielded wire in order to improve the S / N ratio of the sensor signal.

In the above-described embodiment, both the heating wire 16 and the preheating resistor 12 are used for judging a disaster prevention state. However, only the heating wire 16 may be used as a heat source. When only the heating wire 16 is used as a heat source that is thermally connected to the disaster prevention sensor 11, the disaster prevention operation repeatedly occurs, but the effect of preventing ignition can be obtained. In this case, the preheating resistor 12 and the heat coupling plate 13 are omitted, and the disaster prevention sensor 10 is directly connected to the heat induction plate 14.
May be thermally coupled to

Similarly, when only the preheating resistor 12 is used as a heat source, the same effect can be realized only by lowering the thermal response speed. At this time, the mica tube 15 and the heat induction plate 1
4 becomes unnecessary. Note that a resistor that generates heat when energized to the heating wire 16 by being connected in parallel with the heating wire 16 is:
If it is arranged near the preheating resistor 12, the responsiveness of the disaster prevention operation by the disaster prevention sensor 11 can be improved.

Further, the heater device is not limited to the one in which the control unit 2 and the heater unit 5 are connected by the connection cord 4 as in the above-described embodiment, and the control unit 2 is integrated into the heater unit 5. Is also good.

[0020]

According to the heater device for an ornamental fish tank according to the present invention, the disaster prevention function when the heater unit is exposed to the air without changing the basic function and appearance of the heater device for accurately controlling the water temperature. Can be provided in a small, inexpensive, and easy-to-use manner.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a heater device according to the present invention.

FIG. 2 is a functional block diagram of a heater device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heater device 2 Control unit 3 Power cord with plug 4 Connection cord 5 Heater unit 6 Heating part 7 Sensor part 8 Heater cover

Claims (6)

(57) [Claims] 1. A heating unit for increasing a water temperature in an aquarium fish tank and a water temperature detection sensor for detecting a water temperature in the water tank are provided in a heater unit, and a detection of the water temperature detection sensor is performed. A heating unit for an aquarium fish tank, comprising: a control unit for performing heat radiation by a water temperature heating wire under a condition that the temperature is lower than a preset temperature.In the heater unit, a heat source and a disaster prevention An ornamental fish, comprising: a temperature sensor connected thermally, and a disaster prevention state detecting means for detecting a disaster prevention state in which the temperature detected by the temperature sensor for disaster prevention becomes higher than the temperature detected by the sensor for detecting water temperature. Water tank heater device. 2. The heating device for an ornamental fish tank according to claim 1, wherein the heat source thermally connected to the disaster prevention temperature sensor in the heater unit is a water heating wire. Heating device for aquarium fish tank. 3. The heater device for an ornamental fish tank according to claim 1, wherein a heat source thermally connected to the disaster prevention temperature sensor in the heater unit is always on condition that the device power is on. A heater device for an aquarium fish tank, wherein the heater device is a preheating resistor that is energized. 4. The heater device for an aquarium fish tank according to claim 1, wherein the detection means for disaster prevention detects a disaster prevention state, and the heating device is connected to the heating wire for heating water temperature. A heater device for an aquarium fish tank, comprising a power supply cutoff means for cutting off the power supply of the fish. 5. The heater device for an ornamental fish tank according to claim 1, wherein the disaster prevention detecting means detects the disaster prevention state based on detection of the disaster prevention state. A heater device for an aquarium fish tank, comprising a state notification means. 6. The heater device for an ornamental fish tank according to claim 1, wherein a heat source provided in the heater unit is covered with a heater cover. Heating device for aquarium fish tank.