JPH03140776A - Locker type refrigerator - Google Patents

Abstract

PURPOSE:To permit the home delivery system of cold reserving materials having a plurality of temperatures and eliminate the affection of a defrosting system to the other chambers reserving cold materials by a method wherein the chambers of the cold reserving materials can be switched between plus temperature zone and minus temperature zone for refrigerated materials and frozen materials while the minus temperature zone is switched to the plus temperature zone after the opening and closing operation of a door. CONSTITUTION:The selective switches 32, 33, 34 of 5 deg.C, 0 deg.C, -18 deg.C and indicating LEDs 35, 36, 37, corresponding to respective selective switches, are arranged on the front surface of respective heat insulating doors 7 while the selective switches and the indicating LEDs are incorporated into a temperature selective circuit, for setting the temperatures of respective compartments 5a, 5b, 5c at 5 deg.C, 0 deg.C, -18 deg.C, together with a door switch 14 also serviceable as a lamp. The opening and closing signal of the door switch 14, also serviceable as a lamp, is connected so as to be inputted into the LED 34 of 5 deg.C and an IC timer 38 to light the LED 35 of 5 deg.C at all times after opening an heat insulating door 7 while the operation of only the circuit of 5 deg.C of temperature control circuit can be effected by an output A.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is applicable to refrigerated lockers installed in sulbars, etc. to temporarily store refrigerated items, and installed in apartment complexes to automatically receive refrigerated parcels from people who are not home. This invention relates to locker-type refrigerators such as refrigerated lockers, and particularly to those suitable for the latter use.

BACKGROUND OF THE INVENTION Recently, with the increase in the number of absentees in apartment complexes, lockers for apartment complexes have been commercialized for storing parcels when people are not home. On the other hand, the types of home delivery are not limited to simple dry products.
Systems for delivering cold items such as frozen and refrigerated items have also been commercialized. In this case, the lockers must be refrigerated and each room must be able to be set at a temperature suitable for the system. Furthermore, with regard to refrigerated lockers installed in supermarkets and the like, it is preferable that the temperature of the room inside the locker for temporary storage can be set to an arbitrary temperature in view of the need for optimal temperature control.

In this background, a locker-type refrigerator in which the temperature of each room can be set is known as disclosed in Japanese Utility Model Application Publication No. 56-54748. This is accomplished by placing a cooler and temperature controller in each room.

Problems to be Solved by the Invention However, in all conventionally known technologies of this kind, each room is set to a predetermined temperature in advance, and the above-mentioned multi-temperature refrigerated goods delivery system is not suitable. If the temperature of the baggage to be kept is known only at the time of arrival, it is extremely incompatible. Furthermore, regarding the refrigeration system itself, if a cooler is installed in each room, the defrosting method relies on electric heaters or hot gas, but it may affect other rooms, and the system is complicated and expensive. Therefore, the present invention is a locker-type refrigerator suitable for automatic sorting for home delivery, and is compatible with multiple-temperature refrigerated product delivery systems. The purpose is to provide a low-cost product that does not affect other rooms where the food is stored.

Means for Solving the Problems The present invention is a refrigerated goods delivery system that enables the room for cold goods to be switched between a plus temperature range and a negative temperature range for refrigerated goods at temperatures such as +5°C and frozen goods such as -18°C. , equipped with a control device that switches the temperature to the plus temperature range after the door opens and closes.

As a result, after opening the door and taking out the refrigerated items, the temperature is automatically set to the plus temperature range, allowing natural defrosting to occur during this time, allowing the initial purpose to be achieved without the need for a heater or hot gas circuit. It is.

Example An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 indicates the entire locker device, which is composed of a control unit 2, a refrigerated locker unit 3, and a dry locker unit 4. The refrigerated locker unit 3 and the dry locker unit 4 each have an insulated compartment 5 and a compartment 6 from 4 to 4, respectively, for temporarily keeping and storing delivered parcels, etc.
It consists of 3 rooms. Insulated compartment 6, compartment 6 has an insulated door 7
, doors 8 are pivotably supported to open and close, and each door is provided with a locking device 9 that engages with the unit body. Since these structures are the same, the explanation will be given based on FIGS. 2 to 4 as representative examples.

The locking device 9 includes a solenoid 10 that is activated by a signal from the control unit 2, a lock lever 12 that moves up and down with the solenoid 1o and locks and releases the locking hole 11 provided in a part of the unit body 3, and a compartment 6. Lock lever for internal inspection etc.
12, and the like. Reference numeral 14 indicates a lamp/door switch provided corresponding to each compartment 6, 6, which displays the available compartments when depositing a parcel, and indicates the compartment in which the parcel is stored when taking it out from the compartment. This is notified by lighting.

Furthermore, when the lamp 14 is turned on, it is notified to the outside through transparent lenses 19 embedded in the handles 15 of the doors 7 and 8. The back side of the transparent lens 16 is a lamp 1 when the door is closed.
Press the head of 4 and release when the door is opened. That is, lamp 1
No. 4 has a switch function when the head appears and retracts, and also serves as a door switch. The control unit 2 operates the locking device 9 using the switch action of the lamp/door switch 14 as a signal.

Next, details of the refrigerated locker unit 3 will be explained based on FIG. 5.

As shown in the figure, each heat-insulating compartment 5, 5a, 6b, 5c is composed of a heat-insulating wall 17 and a heat-insulating door 7.7a, 7b, 7c. A cooler is constructed by bringing the evaporators 19, 19a, 19b, and 19c into close contact with each other. The refrigeration cycle is composed of a compressor 20 disposed at the bottom of the unit 3, an auxiliary condenser 22 that heats the evaporating dish 21, a main condenser closely attached to the outer box of the unit 3, and the like. Specifically, as shown in FIG. 6, a flow divider 24 is provided on the outlet side of the main condenser 23, an accumulator 26 is provided on the compressor 200 Å outlet side, and a solenoid valve 2 is connected in parallel between them.
6゜26a, 26b, 26c and capillary tube 2γ
.

27a, 27b, 27a and the aforementioned evaporators 19, 19
a.

19b and 19C are connected. 28, 28a,
28b, 28c sense the temperature inside the compartments 5, 5a, 5b, 5c and operate the solenoid valves 26, 28a, 28b, 26c.
A thermistor is used to control the opening and closing of the compartments 5, 5a, 5.
In this embodiment, temperatures inside b and 6c can be set to 5°C, O'C, and -18°C.

Next, a control circuit diagram will be explained.

First, as shown in Fig. 7, the refrigeration cycle is controlled by switches 29.29a, 29b, and 29c, which are turned 0N10FF in the temperature control circuit described later, and solenoid valve 26.26a.
, 26b, 26c, each solenoid 26', 26a'.

2eb', 26C' and delay tie? -30, and control the compressor 20 (7) 0N10FF with the opening/closing control of the solenoid valve and the starting relay 31.

A temperature selection circuit for setting compartments 5.5a, 5b, 5c at 5°C, 0°C, and -18°C is shown in FIG.

That is, as shown in FIG.
℃, -18℃ selection switches 32, 33.34 and corresponding display LEDs 35.38 and sr are arranged, and are incorporated into the temperature selection circuit together with the lamp/door switch 14 mentioned above. It will be done. In FIG.
A horizontal connection is inputted to the C timer 38, and after the heat insulating door 7 is opened, the 5°C LED 36 is always turned on, and only the 6°C circuit of the temperature control circuit to be described later can be operated using the output A. In other words, after the insulating door is released, it is forcibly switched to 6°C no matter what temperature was set before the door was released. Furthermore, the door opening/closing signal is input to the IC timer 38, and this timer 38
The selection switch 32. is pressed only for a certain period of time (for example, 30 seconds).
A timer 38, switches 32, 33, and 34 are connected in a circuit to enable the operations of 33, 34. Furthermore, 0
The output B for °C and the output C for -1a °C are connected so that only the circuit for each temperature can operate.

Next, the temperature control circuit will be explained with reference to FIG. The circuit shown in FIG. 9 shows what is incorporated into one heat insulating door T, and the same circuit is provided corresponding to each of the compartments 5, 5a, sb, and sc. In this circuit, the output of the thermistor 28 placed in the compartment 6 is amplified and input to the 6°C circuit, the 40°C circuit Y, and the -18°C circuit 2, while the aforementioned outputs A, B, Depending on C, only one of the circuits x, y, and z works. Each circuit x, y, z is a switching circuit 39
The above-mentioned switch 29 is opened and closed, thereby opening and closing the solenoid valve 26 to conduct and cut off the refrigerant. (In addition, switches 29a, 29b, 29c, solenoid valves 26a, 26b
, 26c are not shown because they are similar. ) In the above configuration, when the power to the refrigerated locker unit 3 is turned on, the temperature in the insulated compartments 5.5a, 5b, and 5c is initially 6°C.
If it is higher than the thermistor 28.
Detection of 28a, 28b, 28c causes switch 29.29
a.

29b, 29c+ are closed, solenoid valves 26, 26a
.

26b and 26C are opened, and the compressor 2o is operated after a predetermined time using the delay timer 30. Here, when a cold delivery item of -18° C. is to be deposited in the insulated compartment 6, the door 7 is opened and then closed. Although the door switch 14 is activated, it is not related to circuits Y and Z because it is set at 6°C. IC timer 38
The selection switch 32°33 is activated for 30 seconds after door 7 is closed.
．． 34 can be operated, so when the -18°C switch 34 is operated, the LED 37 lights up and the -18°C circuit Z
only works. In this circuit Z, the compressor 2o is operated based on the switching circuit 39 and the switch 29 until the set value is reached.

Next, when I was away and I opened the door 7 to take out the refrigerated parcel at 18°C, the door switch 14 automatically switched to the 6°C circuit X, and the switch 29
Close to cut off the flow of refrigerant.

In other words, although the inner box 18, which serves as a cooler and which was used to cool the heat-insulating compartment 6 to -18°C, becomes heavily frosted over time, the temperature remains at 6°C or higher, which is the plus temperature range, after the refrigerated parcel is taken out. Otherwise, the refrigerant will not flow.

During this time, natural defrosting will occur if the frost dies.

Effects of the Invention As is clear from the above explanation, it goes without saying that the refrigerated locker of the present invention is compatible with a cold delivery system with multiple temperatures in the plus temperature range and the minus temperature range. Yes, even if there is frost on the cooler in the compartment, the temperature will be forcibly switched to the positive temperature range after the door opens and closes, so natural defrosting will occur during this time, and the effect on other compartments will be reduced. There is no need to construct a separate defrosting circuit.

[Brief explanation of the drawing]

Fig. 1 is a front view of a locker device equipped with a refrigerated locker according to an embodiment of the present invention, Fig. 2 is an enlarged front view of the refrigerated locker, Fig. 3 is a sectional view taken along line m-m' in Fig. 2, and Fig. 4. is a sectional view taken along line IV-IV' in Figure 2, Figure 6 is a vertical cross-sectional view of the refrigerated locker, Figure 6 is a diagram of the refrigeration cycle of the same locker, Figure 7 is a basic electrical circuit diagram of the refrigeration cycle, and Figure 8 is a diagram of the refrigeration cycle. 9 is a temperature selection circuit diagram of the same locker, and FIG. 9 is a temperature control circuit diagram of the same locker.

Claims (1)

[Claims] The main body consists of multiple insulated compartments each equipped with a door with a locking device in order to store refrigerated parcels, etc., and a cooler for the refrigeration system placed individually in each of the compartments. A locker-type refrigerator that is capable of selectively switching between at least two temperatures including a temperature range and a negative temperature range, and is equipped with a control device that forcibly switches to a positive temperature after the opening/closing operation of the door.