JP2552594Y2 - Power switching type refrigerator car alarm - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention relates to a compressor drive AC.
The present invention relates to an alarm device for a power supply switching type refrigerating vehicle having a motor.

[0002]

2. Description of the Related Art In a refrigerating car equipped with an AC motor for driving a compressor, when parking for a long time, a three-phase AC power supply from a building is connected to a three-phase AC outlet in a power supply box provided at the rear of the vehicle body. After the engine is stopped, the compressor is driven by the AC motor to operate the refrigeration system.

FIG. 4 illustrates a refrigerating vehicle equipped with a compressor driving AC motor. In FIG. 4, reference numeral 11 denotes a condenser unit installed at the upper part of the cabin, 12 denotes an evaporator unit installed at the upper part of the cabin, and 13 denotes an A for driving the compressor mounted at the center of the vehicle side.
A motor housing 14 for housing the C motor is a power supply box provided at the rear end of the side of the vehicle. When a lid (not shown) is opened, a three-phase AC outlet is provided inside. This outlet and the AC motor for driving the compressor are electrically connected. Reference numeral 15 denotes a control box.

Then, the engine is stopped, the lid of the power supply box is opened, the three-phase AC power supply from the building is connected to the three-phase AC outlet, and the compressor is driven to operate the refrigeration system. When the vehicle is started with the three-phase AC power supply inserted, a buzzer sounds and an alarm system shown in FIG. 3 is provided.

In FIG. 3, reference numeral 21 denotes a battery. The cathode of the battery 21 is grounded, and the anode of the battery 21 is connected to the contact a of the ignition switch 22.
The ignition switch 22 is set to “OFF”, “AC
It is possible to switch to "C", "IG", and "ST" contacts (also "R" contacts).

The "R" and "IG" contacts of the ignition switch 22 are connected to a relay 24 via a lid switch 23 which is closed when the lid of the power supply box is opened.
Is connected to one end of the relay coil 24L, and the other end of the relay coil 24L is grounded. Further, the "R" contact and the "IG" contact of the ignition switch 22 are relayed.
24, connected to one end of a buzzer 25 provided in the power supply box via a relay switch 24S.
Is grounded.

After opening the lid of the power supply box with the lid of the power supply box open, connecting the three-phase AC power supply from the building to the three-phase AC outlet, driving the compressor to operate the refrigeration system, When the vehicle is started with the three-phase AC power supply plugged into the outlet, the lid coil 23 is closed and the relay coil 24 is closed.
L is excited, the relay switch 24S is closed, and the buzzer-2
5 makes an alarm.

[0008]

However, when the power box has a buzzer, there is a problem that the driver does not notice that the buzzer is sounding.

The present invention has been made in view of the above points, and a purpose thereof is to surely warn when a vehicle is to be started with a three-phase AC power supply connected to an outlet of a power supply box. It is an object of the present invention to provide an alarm device for a power-switchable refrigerating vehicle, which can prevent the occurrence of the alarm.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a power supply box which houses an outlet for taking in an external power supply and has a lid attached to a housing, a lid switch for detecting opening and closing of the lid, and one end connected to the anode of the battery. A horn device whose other end is grounded via a relay switch of a relay, and one end of which is connected to the anode of the battery via an "ST" contact or "IG" contact of an ignition switch;
A relay coil of the relay grounded via the lid switch, a resistor switched to be inserted or not inserted in series with the relay switch of the relay in response to operation of a changeover switch, And a means for activating the changeover switch and inserting a resistor in series with the relay switch of the relay when nighttime is detected by the nighttime detection means.

[0011]

In the state where the lid of the power supply box is opened and the power is inserted into the outlet, the lid switch is closed. Therefore, when the ignition switch is set to the "IG" position or the "ST" position, the relay is activated to supply the battery to the horn device, and the horn device is alerted. At this time, when the lighting switch is turned on at night, a resistor is inserted in a closed circuit formed by the horn device and the battery to lower the volume of the horn.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a control circuit diagram of a warning device for a power supply switching type refrigerator car, and FIG. 2 is a cross-sectional view of a main part of a power supply box.

In FIG. 1, reference numeral 31 denotes a battery. The cathode of the battery 31 is grounded, and the anode of the battery 31 is connected to the contact a of the ignition switch 32.
The ignition switch 32 is set to “OFF”, “AC
It is possible to switch to "C", "IG", and "ST" contacts (also "R" contacts).

The "R" contact and the "IG" contact of the ignition switch 32 are a relay coil 33L of a relay 33, a normally closed release switch 34, and a power supply box 14.
Is grounded via a lid switch 35 which closes when the lid is open.

Further, the anode of the battery 31 is
a and 36b are connected to one end, respectively, and the other ends are grounded via a normally open horn switch 37 and grounded via normally closed contacts a of a relay switch 33S and a power down switch 38. You. The normally open contact b of the power down switch 38 is grounded via a resistor r.

Further, the anode of the battery 31 is grounded via a headlight 40, a light switch 41, a resistor r1, and a resistor r2. The connection point between the resistors r1 and r2 is connected to the base of the transistor Q1. The emitter of the transistor Q1 is grounded, and the collector is connected to the power supply via the relay coil 42L of the relay 42. Relay 42
Relay switch 42S is the power down switch 3
Works with 8.

Next, a main part sectional view of the power supply box 14 will be described with reference to FIG. In FIG. 2, reference numeral 51 denotes a housing of the power supply box 14. A lid 52 that opens to the side of the vehicle is attached to the housing 51. An outlet 53 for a three-phase power supply is mounted inside the lid 52. A lid switch 35 that closes when the lid 52 is opened is provided inside the housing 51. Further, a release switch 34 is provided near the lid switch 35.

Next, the operation of the embodiment of the present invention configured as described above will be described. In the freezing vehicle shown in FIG. 4, the refrigeration system is operated by driving the engine during traveling, and the items in the freezer are frozen.

However, when the engine is stopped for a long time, the refrigeration system driven by the engine cannot be driven. Therefore, the lid 52 of the power supply box 14 is opened, and the three-phase AC power supply from the building is inserted into the outlet 53. Then, the function of the refrigerating car is exhibited.

When the ignition switch 32 is set to the "IG" position or the "ST" position in order to start the refrigerating vehicle without forgetting to disconnect the three-phase power supply from the outlet 53 in the power supply box 14, the exciting coil 33L is turned off. It is excited and the relay switch 33S is closed. For this reason, the horns 36a and 36b warn. By the way, since the light switch 41 is closed at night, the transistor Q1 is activated, the relay coil 42L is excited, the power down switch 38 is closed to the contact b side, and the resistor r is inserted. Therefore, at night, the horns 36a, 36
b is warned small.

Further, if the warning of the horns 36a and 36b indicates that the user has forgotten to remove the three-phase power supply from the outlet 53, the warning can be stopped by turning off the release switch 34. .

In the above-described embodiment, the signal from the light switch 41 is used to detect the nighttime. However, the present invention is not limited to this. Between
A resistor r may be inserted.

In the above embodiment, the case where the alarm device is applied to a refrigerating car has been described. However, the present invention is not limited to this, and the present invention can be applied to a vehicle having a power supply box for accommodating an outlet for taking in an external power supply.

[0024]

[Effects of the Invention] As described in detail above, according to the present invention, while the three-phase AC power supply is connected to the outlet of the power supply box,
It is possible to provide an alarm device for a power-switchable refrigerated vehicle, which can surely prevent the vehicle from starting and prevent noise from occurring at night.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram of an alarm device of a power supply switching type refrigerator car according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the power supply box.

FIG. 3 is a control circuit diagram of a conventional power supply switching type refrigerator car alarm device.

FIG. 4 is a perspective view of a power supply switching type refrigerating vehicle.

[Explanation of symbols]

31 ... battery, 32 ... ignition switch, 33
... Relay, 34, release switch, 35, lid switch, 36a, 36b, horn, 38, power down switch.

Claims (1)

(57) [Scope of request for utility model registration] 1. A power supply box which houses an outlet for taking in an external power supply and has a lid attached to a housing, a lid switch for detecting opening and closing of the lid, and one end connected to the anode of the battery and the other end connected to a relay. Relay
A horn device grounded via a switch, one end of which is connected to the anode of the battery via an "ST" or "IG" contact of an ignition switch,
A relay coil of the relay grounded via the lid switch, a resistor switched to be inserted or not inserted in series with the relay switch of the relay in response to operation of a changeover switch, And a means for inserting a resistor in series with the relay switch of the relay when the night is detected by the night detecting means. Switch-type refrigerator car alarm device.