JPH04117372U - Freezer automatic ventilation system - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an automatic ventilation system that automatically ventilates the inside of the refrigerator to prevent the concentration of ethylene gas generated when fruits and vegetables and fresh flowers are transported in the freezer from increasing above a certain value. try [Configuration] Exhaust duct opened and closed by a damper in the freezer,
An ethylene gas controller is installed to detect the ethylene gas concentration in the suction duct and the refrigerator, and when the ethylene gas concentration in the refrigerator becomes higher or lower than the set value, the ethylene gas controller controls the exhaust duct and suction duct via a solenoid. Open and close the damper.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was developed for use in refrigerated vehicles that transport fruits, vegetables, and fresh flowers (hereinafter referred to as fresh cargo). Provide ventilation to maintain a constant ethylene gas concentration in freezers such as refrigerated containers. Concerning automatic ventilation equipment.

0002

[Conventional technology]

When transporting raw cargo, refrigerated vehicles and refrigerated containers are used to keep the raw cargo at a low temperature. Transport is being carried out with

0003 These raw cargoes generate ethylene gas during transportation, and this gas is released into the freezer. Accumulation of raw cargo will accelerate the growth of the raw cargo, leading to premature spoilage. There, the import During transport, the inside of the freezer must be ventilated from time to time to remove ethylene gas.

0004 Conventionally, this ventilation operation was performed by the driver of a refrigerated vehicle.

[0005]

[Problem that the idea aims to solve]

In the case of refrigerated containers loaded onto trains or ships, ventilation inside the container is required as they are unmanned. I can't do it. If transporting by refrigerated vehicle, is the driver nearby? Although ventilation can be operated by the driver, it is important to always keep ventilation in mind when driving. This is not only extremely troublesome, but also impedes safe driving. Also, take a car to a ferry If the driver leaves the vehicle after loading the vehicle, ventilation operations will no longer be possible.

[0006]

[Means to solve the problem]

This idea detects the ethylene gas concentration inside the freezer and connects the exhaust duct and intake duct. The damper that blocks the refrigerator is opened and closed to automatically ventilate the freezer and reduce the concentration of ethylene gas inside the refrigerator. The above problem was solved by keeping the temperature constant.

[0007]

[Effect]

Ventilation inside a freezer when transporting raw cargo varies depending on the type of raw cargo. , set the concentration of the ethylene gas controller according to the raw cargo being transported, and If you turn it on, it will automatically continue to provide ventilation suitable for raw cargo during transportation. be able to.

[0008]

【Example】

The drawings schematically show an embodiment of the present invention, and FIG. 1 shows a refrigerated vehicle equipped with a freezer. Figure 2 is a cross-sectional view showing how the refrigerator and ventilation duct are installed in the freezer. 3 is a side view showing the duct opening/closing mechanism, and FIG. 4 is an electrical wiring diagram of the device.

[0009] The front of the freezer 1 of a refrigerated car has a dedicated engine, as shown in Figure 1. A refrigerator 2 that is driven by the refrigerator is installed, and as shown in Fig. The cool air is blown into the refrigerator from the air intake port 4, and the air inside the refrigerator is sucked in from the suction port 4, cooled again, and then blown out. I have to.

0010 When ventilating, use the exhaust duct 5 and intake duct 6 that penetrate the wall of the freezer. Open the lid to exhaust the air inside the refrigerator, draw outside air into the refrigerator 2, cool it, and discharge it into the refrigerator. . The suction duct 6 communicates with the suction port 4 of the refrigerator inside the refrigerator.

[0011] The open ends of the exhaust duct 5 and the intake duct 6 are rotatable by a shaft 7 as shown in FIG. It is normally blocked by a damper 9 supported and tensioned by a spring 8. , when the solenoid 10 is energized and the damper 9 is rotated against the spring 8, the damper The door is opened to provide ventilation.

0012 Exhaust solenoid 10a opens exhaust duct 5, intake solenoid opens intake duct 6 10b and an ethylene gas controller 12 for sensing the ethylene gas concentration. These are electrically connected as shown in FIG.

[0013] The ethylene gas controller 12 controls when the ethylene gas concentration in the freezer is lower than the set value. When the temperature rises, the power relay 11 is energized, the normally open contact 11a is closed, and both are connected. The solenoids 10a and 10b are energized.

[0014] 13 is a power supply, and 14 is a source switch. When not performing automatic ventilation, If the switch 14 is left open, the device will not operate.

[0015] To automatically ventilate the freezer with this automatic ventilation device, follow the steps below. .

[0016] Set the concentration value detected by the ethylene gas controller 12 according to the properties of the raw cargo. and close the main switch 14. This causes the ethylene gas controller 12 to Detects the concentration of chilli gas, and if the gas concentration is higher than the set value, power relay 1 is activated. 1, and contact 11a is closed until the concentration decreases.

[0017] As a result, power is transmitted to the exhaust solenoid 10a and the intake solenoid 10b, and each solenoid The noid works to open the two dampers 9 blocking the exhaust duct 5 and intake duct 6. This allows the air inside the freezer to be exhausted little by little, allowing the outside air to cool together with the air inside the freezer. It is sucked into the freezer 2, cooled through the freezer, and discharged into the freezer. this In this way, the air inside the refrigerator is replaced with outside air little by little. The temperature inside the refrigerator changes rapidly. It never gets put away.

[0018] When the ethylene gas concentration inside the refrigerator decreases, the power relay 11 opens and the solenoid 10 Since the power to a and 10b is cut off, the damper 9 is pulled by the spring 8 and the duct 5 , 6 are closed. Instead of providing the spring 8 independently, it is installed inside the solenoid. A return spring may also be used.

[0019] In this way, ventilation is not performed until the next high ethylene gas concentration.

[0020] In this way, ventilation inside the refrigerator starts each time the ethylene gas concentration increases, and This automatically maintains the ethylene gas concentration within the tank at a constant level.

[0021]

[Effect of the idea]

As mentioned above, ventilation inside the freezer is carried out every time the ethylene gas concentration becomes higher than the predetermined value ( (i.e., at concentration intervals), it can be used in an unattended container or other freezer. It also prevents raw cargo from spoiling prematurely due to the ethylene generated. This eliminates the need for the driver of a refrigerated vehicle to ventilate the inside of the refrigerator, allowing the driver to You will be able to concentrate on your work.

[Brief explanation of drawings]

FIG. 1 is a side view of a refrigerated vehicle equipped with a freezer.

FIG. 2 is a cross-sectional view showing a freezer with a refrigerator and a ventilation duct attached.

FIG. 3 is a side view showing the duct opening/closing mechanism.

FIG. 4 is an electrical wiring diagram of the device.

[Explanation of symbols]

1 Freezer 2 Freezer 3 Discharge port 4 Inlet 5 Exhaust duct 6 Suction duct 7 axis 8 Spring 9 Damper 10 Solenoid 10a Exhaust solenoid 10b Suction solenoid 11 Power relay 11a Contact 12 Ethylene gas controller 13 Power supply 14 Original switch

Claims (1)

[Scope of utility model registration request] Claim 1: A freezer (1) equipped with a refrigerator (2) is provided with an exhaust duct (5) penetrating the wall and an intake duct (6) that allows outside air to pass through the intake port (4) of the refrigerator. , an exhaust solenoid (10
a), a damper (9) is installed that opens when the suction solenoid (10b) is energized, and detects the ethylene gas concentration in the freezer and activates the power relay (1
1) is provided with an ethylene gas controller (12) that energizes the ethylene gas controller (12), and when the power relay (11) is energized by the ethylene gas controller (12), it closes the contact (11a) and powers the exhaust solenoid (10a) and suction solenoid (10b). Automatic ventilation system for freezers shall be connected to.