JP2003343962A - Commercial refrigerator - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To ensure safety when entering a commercial refrigerator that generates an electric field by a high voltage in the refrigerator. SOLUTION: A plurality of switches Box _1-3 are arranged in a storage. A switch Box ₄ is provided outside the refrigerator, and a sequential circuit is provided for determining the order of activating the switches Box _1-4 provided inside and outside the refrigerator. The output relay RL ₄ for turning on and off the high voltage generating unit 1 in this order circuit output provided. Further, by providing the door switch LS for turning on and off the output relay RL ₄ to goods movements door 2, opened the door 2 during warehousing, high voltage generating means 1 is turned off. If the switches Box _1-4 are not operated based on the priority order, the high-voltage generating means 1 will not be turned on, so that entry / exit can be performed safely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator for business use, which can be put in and taken out safely.

[0002]

2. Description of the Related Art Some commercial refrigerators are provided with a high voltage generating means to apply a high voltage to a refrigerator or a freezer to generate an electric field for maintaining the quality of food (material).

That is, an electrode is provided in the chamber and connected to a high voltage generating means, a high voltage is applied to the electrode to discharge static electricity, and the discharged static electricity forms an electric field in the chamber. Then, the electric field acts on the water content of the food stored in the refrigerator to subdivide the water clusters and strengthen the bond between the water and the protein. Therefore, the meat and seafood stored in the refrigerator can be kept fresh for a long period of time. Similarly, vegetables and fruits can be kept fresh for a long time.

At this time, since ozone is also generated at the same time,
It suppresses the development of bacteria and mold, and also stops spoilage,
It can be stored for a long time while keeping the freshness of food.

However, when the refrigerator provided with such a high-voltage generating means is large in size, in order for food (material) to be carried in or carried out from the inside of the refrigerator, it is natural that a person enters the inside of the refrigerator. coming and going. At this time, it is dangerous to apply a high voltage to the inside of the refrigerator, so, for example, conventionally, an on / off switch for the high voltage generating means is provided outside the refrigerator, and the switch is operated to turn off the high voltage generating means. I was going to store it later.

[0006]

However, in the case where the high-voltage generating means is turned off by the on / off switch provided outside the refrigerator as described above, forget to turn off the switch without fail, and There is a problem that the product is stored while the voltage generating means is operating.

Further, since the on / off switch is located outside the warehouse, there is a possibility that the switch may be turned on during the warehouse by some mistake.

Therefore, the object of the present invention is to
If you forget to switch it off, or if it is accidentally switched on during storage, it is safe.

[0009]

In order to solve the above problems, according to the present invention, a high voltage generating means is provided to generate an electric field in a refrigerating or freezing room in which a person enters. Inside, a plurality of switches are arranged, a switch is provided outside the refrigerator, and a sequential circuit for setting the order of activating the switches provided inside and outside the refrigerator is provided and is turned on / off by the output of the sequential circuit. The switch means is provided in series between the high-voltage generating means and its power source, and the door switch for turning on / off the switch means provided in series is provided at the entry / exit door of the refrigerator.

By adopting such a construction, when the door is opened even if the high voltage generating means is forgotten to be cut off at the time of storage, the door switch is activated and the switch means is turned off, so that the power source and the high voltage generating means are turned off. Therefore, it can be stored safely.

On the other hand, during storage, for example, even if the switch outside the storage compartment is operated and the door is closed, the high voltage generating means is not turned on unless the switch inside the storage compartment is operated based on the priority order.

Further, the high voltage generating means is not turned on unless the switches inside the refrigerator are operated in order, the doors are closed, and then the switches outside the refrigerator are not activated. Therefore, a high voltage is applied while inside the refrigerator. It will not be done. Therefore, you can safely leave.

At this time, it is possible to adopt a configuration in which the switches arranged at a distance from the entry / exit doors in the above-mentioned cabinet have a higher operation order.

By adopting such a structure, for example, even when there are a plurality of workers in the warehouse, it is necessary to operate the switches in order from the farthest switch away from the entry / exit door. it can.

Further, at this time, by adopting a configuration in which each of the switches is provided with a display means for displaying the operation of the switch, it is possible to confirm the operating state of the high voltage generating means by looking at the display means. You can move in and out and work during storage.

Further, at this time, it is possible to adopt a construction in which an emergency stop button for canceling the output of the sequential circuit is provided at the position where each switch is arranged in the above-mentioned cabinet.

By adopting such a configuration, for example, when the switch outside the warehouse is operated by mistake, the door is closed, and the switches inside the warehouse are operated in order by mistake during storage. However, the high voltage generating means can be turned off by activating the emergency stop button of the switch near the inside of the refrigerator.

Further, there is provided a configuration in which an alarm circuit is provided for notifying that the door is closed from the switch output and the door switch output arranged outside the storage of the sequential circuit before the switch output outside the storage is output. Can be adopted.

By adopting such a configuration, when the door is closed during the warehousing (because the switch outside the garage can be turned on after the warehousing), an alarm circuit (sound or the like is acceptable)
A beep sounds to notify the worker in storage.

Further, it is possible to adopt a structure in which a plurality of door switches are connected in series and used.

By adopting such a structure, even if one of the door switches fails and is turned on, the remaining door switches function to turn off the high voltage generating means. be able to.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

This type of commercial refrigerator (including a freezer)
As shown in FIG. 1 (a), is equipped with a high voltage generating means 1 and is formed in a size such that a person can stand inside the refrigerator.
As shown in FIG. 2, a plurality of switch boxes Box _1-3 are arranged in the _refrigerator . In addition, a switch box Box ₄ is provided beside the loading / unloading door 2 outside the storage, and a sequential circuit for assigning the operating order of these switches Box _1-4 , and the high voltage generating means 1 is turned on / off by the output of the sequential circuit. Switch means for turning on and off, and a door switch LS for turning the switch means on and off.

This refrigerator for business use is of a prefabricated type. For example, in FIG. 1, a side panel, a back panel, a ceiling panel, a bottom panel, a front panel, a loading / unloading door 2 and a DC are provided.
It consists of unit 3.

Each panel (including the door 2) is shown in FIG. 1 (b).
As shown in, the outer material 10 is made of metal (for example, stainless steel, color steel material, rustproof steel plate), but the inner material 11 is formed of an insulating plate (resin or the like) having excellent electric insulation,
Between the outer material and the inner material, a heat insulating layer (such as polyurethane) 12
Has a three-layer structure. In addition, each panel has
A well-known rotary hook or a slit that engages with the hook is provided, and the ends of the panels that engage with each other are aligned, and the hook of the rotary hook is projected by a screwdriver or the like to engage with the slit. assemble.

In this assembled storage, a plurality of racks (shelves) 4 in consideration of the arrangement position are provided so that the foods (materials) to be stored can be classified by type and stored according to the temperature zone. ing. Each of the racks 4 is made of a conductive metal, and can be used by connecting each rack 4 to the high voltage generating means 1 of the DC unit 3 by using it as an electrode.

The DC unit 3 is composed of a compressor, a condenser, a receiver tank, a controller, and the high voltage generating means 1 described above, and as shown in FIG. It is designed to be connected to the provided cooler.

Further, since the high voltage generating means 1 applies a different voltage (voltage suitable for food (material)) to each rack 4, in this embodiment, for example, one rack as shown in FIG. A plurality of power supplies are prepared so that a single power supply can be applied with a voltage adapted to the food (material).

On the other hand, the sequential circuit of this embodiment is composed of four switch boxes Box _1-4 as shown in FIG.

That is, the switch boxes Box ₁ and B
The ox ₂ is attached to the left and right of the interior away from the entry / exit door 2, and the switch box Box ₃ is attached to the side of the entry / exit door 2 in the interior. The switch box Box ₄ is attached to the side of the door 2 outside the refrigerator.

As shown in FIG. 4, the switch box Box _1-4 includes a self-resetting push switch PBb _1-4 ,
It is composed of holding relays RL _1-3 , ₅ , indicator lamps PLr, PLg, and emergency stop switch PBa _1-3 (excluding Box ₄ ), and these switch boxes Box _1-4 are connected in series. .

Specifically, each switch box Box
_1-4 is a self-resetting push switch PBb _1-4 and holding relays RL _1-3 , ₅ connected in series,
The a-contacts _{1-3 and 5} are connected in parallel with the switch PBb _1-4 to form a holding circuit. In addition, the holding relay RL
_1-3,5 and red display lamps PLr in parallel Yes connected, the lamp PLr is turned on when the holding relay RL _1-3,5 has enabled switch box Box _1-4 operates Is done. Furthermore, push switch PB
b _1-4 and be connected to one green indicator lamp PLg parallel to the series circuit of the holding relay RL _1-3,5, usually display lamp PLg of green lights in the energization.

Further, the emergency stop switch PBa _1-3 is provided in series with the push switch PBb _1-4 so that the circuit can be opened in an emergency.

This switch box Box_1-4Is each
Box_1-4Holding relay RL _1-3,5The rest of a
Emergency stop switch PBa on the previous stage and the current box via the point
_1-3(Box_FourThen, the emergency stop switch PBa_1-3Teenager
Instead of the door output relay RL, which will be described later₆A contact) of
It is designed to be connected, and the switch box B in the previous stage
ox_1-4Power through V_DDConnected with. According to
The switch box Box in the front stage_1-4Does not work
And the switch box Box in the latter stage_1-4Does not work
And the sequential circuit is formed by doing this.
It

[0035] Thus the switch box Box ₄ of a connected final stage, the holding relay RL ₅ and the output relay RL ₄ connected are provided in parallel, the relay RL ₄ of a contact of the power supply V _DD and the high-voltage Provided between the generating means 1,
The high voltage generating means 1 is turned on / off by a sequential circuit output.

Further, the output relay RL_FourTurn off
Therefore, as shown in FIG. 4, the door output relay RL is used.₆To
Installed and connected in series with the door switch LS, its relay
RL ₆A contact of the switch box Box_FourEmergency stop
It is provided instead of the switch.

At this time, in this embodiment, the door switch L
Two S are attached to the entrance / exit doors (LS ₁ , LS ₂ ),
The two switches LS ₁ and LS ₂ are connected in series and used. By doing so, for example, even if one of the door switches LS ₁ or LS ₂ fails and the door 2 is opened and the door 2 is opened, the other switch is opened and the relay RL ₆ can be turned off. Yes, it has improved safety.

Therefore, when the loading / unloading door 2 is closed,
If the switch LS is on, the relay RL₆Is activated
Switch Box Box_FourIs enabled and the output relay
RL _FourWill be able to operate. On the contrary, if the door 2 is opened
Then, the door switch LS turns off and the relay RL₆
Turns off and the output relay RL_FourAlso turned off
ing.

Further, this circuit includes a relay RL.₇Set up
The relay RL₇Door output relay RL₆B contact
And switch box Box_FourHolding relay RL_FiveA contact
Relay RL connected in series with the point and connected in series₇B contact
Switch Box Box ₁And power V_DDConnected between
A reset circuit RS is provided.

In this reset circuit RS, normally, the relay RL ₇ is off, the b contact of the relay RL ₇ is closed, and the sequential circuit is connected to the power source V _DD to be energized. When the loading / unloading door 2 is opened without activating the switch box Box ₄ (outside the storage) with 1 being on, the contact a of the holding relay RL ₅ is “closed” and the contact b of the door output relay RL ₆ is “closed”. ", And relay RL ₇ is turned on. Therefore, the b contact of relay RL ₇ is "open".
Then, the sequential circuit is reset, and the high voltage generating means 1 is turned off so that no voltage is applied to the inside of the refrigerator.

Further, a buzzer circuit B for alarm is provided in this circuit. The alarm buzzer circuit B is connected in series with the b contact of the holding relay RL ₅ of the final stage switch box Box _{4 and the} a contact of the door output relay RL ₆ .
This series circuit is connected in parallel with the switch box Box ₃ to the output of the holding relay RL ₂ of the switch box Box ₂ .

Therefore, if the switch box Box ₄ (outside the storage) is not operated when the entry / exit door 2 is closed, the contact a of the relay RL ₆ is "closed" and the holding relay RL is closed.
The b contact of ₅ is "closed" and the buzzer Bz sounds to notify that the loading / unloading door 2 is closed. At this time, even if the loading / unloading door 2 is closed and an alarm sounds, the high voltage generating means 1 does not operate unless the outer switch box Box ₄ is activated, so it is safe. By the way, if you open the entry / exit door 2, the alarm will stop.

Further, in this circuit, the main switch MS
Is provided (adjacent to the switch box Box ₄ ), and the entire circuit can be returned to the initial setting by operating the switch MS.

In the figure, AVR is a constant voltage power supply for stably operating the circuit.

This form is constructed as described above, and in this refrigerator, it is normally held in a state in which the sequential circuit is set (a state in which the holding relays RL _1-3 , ₅ are operated).

When a person enters the refrigerator, the main switch MS is first turned off, and the switch box Box outside the refrigerator is temporarily turned on.
₄ After confirming that the indicator lamp PLg (outside the store: next to the storage door 2) is off, open the storage door 2 and go inside. At this time, since all the relays of the circuit are reset, only the green energization display lamp PLg of the switch box Box ₁ should be turned on in the refrigerator. Therefore, confirm this and go inside.

At this time, when the main switch MS is forgotten to be opened and the loading / unloading door 2 is opened (forgetting to return to the initial setting), the door switch LS is turned off and the door output relay RL ₆ is also turned off. Become. At this time, even if the switch box Box ₄ is turned on, the holding relay RL ₅
In this case, the b contact of the door output relay RL ₆ used in the reset circuit RS is closed,
At the same time, the holding relay RL ₅ of the switch box Box ₄
The a contact of is also closed. As a result, the relay RL ₇ of the reset circuit RS is turned on, and the b contact of the relay RL ₇ is opened. Therefore, the switch boxes Box _1-4 of the sequential circuit, which are connected to the power supply V _DD through the b-contact, are instantly released from holding, and the high voltage generating means 1 is also turned off, so that a high voltage is generated in the refrigerator. It will not be applied. And thus, when the holding relay RL ₅ of the switch box Box ₄ is turned off, for a contact of the holding relay RL ₅ is opened, it becomes off relay RL ₇ of the reset circuit RS, b of the relay RL ₇ The contacts are closed and the sequential circuit is connected to the power supply V _DD . Therefore, the switch box Box in the refrigerator
Of _1-3 , only the green electricity indicator lamp PLg of the upstream switch box Box ₁ will be turned on,
Check this and store it.

On the other hand, the loading / unloading door 2 is accidentally closed during loading.
Output relay RL for doors₆Is turned on and the buzzer
-Door output relay RL installed in circuit B₆A contact is closed
Therefore, the buzzer circuit B sounds to notify. At this time,
Even if the buzzer Bz sounds, the outside switch box Box
_Four(Push switch PBb_Four) Is not activated
The high voltage generator 1 is safe because it does not operate,
Switch Box Box _1-3Emergency stop switch PB
a_1-3Is activated, the holding relay RL_FiveIs off
Holding relay RL_FivePower supply V with a contact of_DDSupplied by
Downstream switch box_1-4Turn off
it can. Therefore, in the unlikely event that the switch box B
ox_1-4Even if all are turned on, the emergency stop switch
Touch PBa_1-3Output relay RL₆The
It is safe because the high voltage generator 1 can be turned off.
It In addition, the emergency stop switch PBa_1-3To activate
At the same time, you can also call out that you are inside
It

The buzzer Bz is the main switch MS.
It can be stopped by turning off once or by leaving the inside of the refrigerator in a predetermined procedure.

The procedure for exiting the inside of the refrigerator is to operate the switch boxes Box ₁ → Box ₂ → Box _{3 in} that order. Finally, when the loading / unloading door 2 is closed and the switch box Box ₄ is actuated, the output relay RL ₄ is actuated and the high voltage generating means 1 is turned on, so that a voltage can be applied to the inside of the warehouse.

As described above, the switch box Box ₁ separated from the loading / unloading door 2 must be operated in order, so that, for example, even when there are a plurality of workers in the storage box, the switch box in the storage box can be operated. You can leave while checking the safety while operating each one in order.

FIG. 5 shows an example of the arrangement of switches according to the size of the refrigerator. In this case, the switch boxes are presented by numbers such as ...

In this way, even if the switch is forgotten to be turned off at the time of warehousing, or the warehousing door 2 is closed during warehousing, the high voltage generating means 1 can be turned off to maintain safety.

[0054]

As described above, according to the present invention, since the high voltage can be prevented from being applied to the inside of the refrigerator by the above-mentioned constitution, the work can be performed safely.

[Brief description of drawings]

FIG. 1A is a perspective view of an embodiment. (B) Sectional drawing of the panel of (a)

FIG. 2 is an internal layout diagram of an embodiment.

[Figure 3] High-voltage power supply connection diagram

FIG. 4 is a circuit diagram of an embodiment.

FIG. 5 is a chart showing another embodiment.

[Explanation of symbols]

1 High voltage generating means 2 Entry / exit door 3 DC unit B Buzzer circuit Bz Buzzer Box _1-4 Switch box LS Door switch LS ₁ Door switch LS ₂ Door switch PBb _1-4 Push switch PBa _1-3 Emergency stop switch PLr Display lamp PLg display lamp RL _1-3,5 holding relay RL ₄ output relay RL ₆ door for output relay

Claims (6)

[Claims] 1. A plurality of switches are arranged in the refrigerator of a commercial refrigerator in which a high voltage generating means is provided to generate an electric field in a refrigerating or freezing room in which a person enters and a switch is provided outside the refrigerator. Provided with a sequential circuit for ranking the switches provided inside and outside the cabinet,
A switch means which is turned on / off by the output of the sequential circuit is provided in series between the high voltage generating means and its power source, and a door switch for turning on / off the switch means provided in the series is provided at the entrance / exit door of the refrigerator. Commercial refrigerator provided. 2. The operation order of a switch arranged at a distance from the entry / exit door in the warehouse is high.
Commercial refrigerator as described in. 3. The refrigerator for business use according to claim 1, further comprising display means for displaying the operation of each switch. 4. The commercial refrigerator according to claim 1, further comprising an emergency stop button for canceling the output of the sequential circuit provided at a position where each switch in the refrigerator is arranged. 5. An alarm circuit is provided for notifying that the door is closed before the switch output outside the storage is output from the switch output and the door switch output arranged outside the storage of the sequential circuit. The commercial refrigerator according to any one of 1 to 4. 6. The commercial refrigerator according to claim 1, wherein a plurality of the door switches are connected in series and used.