JPS58195773A - Cold-hot changeover type storehouse - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a storage cabinet that can switch between cold and hot operation for switching between refrigerating and hot storage of articles.

Conventionally, vending machines are generally known as this type of storage that can switch between cold and hot operation, so this conventional vending machine will be explained with reference to FIGS. 5 and 6. 1 is the outer box 2a,
The main body of the vending machine has an inner box 2b1゛insulating material 2C,
The interior of the main body 1 is divided into two product storage chambers 3a and 3b on the left and right, and each chamber 3a and sb includes
Product shelves 4a and 4b are provided respectively. The vending machine consists of this main body 1 and a door (not shown). Further, the product storage chambers 3a and 3b are provided with evaporators 5a and sb for cooling, and heaters 6a for heating, respectively.

Blower fans 7a and 7b are arranged to forcefully circulate cold air and warm air into each of the chambers 6b and 3a and 3b.

And evaporator sa arranged in each chamber 3a, ab
, sb are connected in series to each other and sequentially connect the electric compressor 8, condenser 9, first capillary tube 10a, evaporator 5a, and evaporator 6b, and include a second capillary tube 1ob that bypasses the evaporator 6a. A circuit 11 is formed, and a first circuit 11 is formed.
Electromagnetic valves 12a and 12b are provided at the inlet portions of the second capillary tubes 10a and 10b, respectively.

The solenoid valves 12a and 12b are opened and closed by an electric signal based on a selection switching command between cold and warm operation. In the above configuration, when both the product storage chambers 3a and 3b are in cooling operation, the solenoid valve 12a is The circuit is opened, the solenoid valve 12b is closed, the refrigerant flows through the refrigerant circuit indicated by the solid arrow, and the product storage chamber 3
The compartments a and sb were being cooled. Also, product storage room: 3:
・Yu 1. ．． ．． When heating the product storage compartment 3b and refrigerating the product storage compartment 3b, the solenoid valve 12a is closed and the solenoid valve 12b is opened, allowing the refrigerant to flow through the refrigerant circuit indicated by the dotted line arrow.
Only the product storage chamber 3a is operated for cooling, and the product storage chamber 3a is operated for heating by the heater 6a. When both chambers 3a and 3b are kept warm, the electric compressor 8 is stopped and both chambers 3a and 3b are operated at a warm temperature by heaters ea and eb.

As mentioned above, heaters ea, eb, compressor 8, solenoid valve 12
By selecting a and 12b and energizing them, the product storage chambers aa and ab change from cold to cold and hot to cold.

A combination of warm and hot operation was obtained, allowing one vending machine to sell cold and hot products at the same time.

However, since the load on the compressor 8 is significantly reduced in the case of cold-to-temperature operation compared to the case of cold-to-cold operation, when the amount of refrigerant to be charged in the cooling system is determined based on the cold-to-cold operation, - When operating at high temperatures, the capacitor's power is large, leading to supercooling and liquid refrigerant power of 8.
□Eゎ, il・3, power, □1, 7 months, 4゜□,,,
, J1 Qing. - If the amount of refrigerant to be filled in the cooling system is determined based on the criteria of -1 and -1, there is a risk that the amount of gas will be excessive during cold-cool operation, and -there is a risk that liquid refrigerant will be sucked into the compressor It was necessary to take measures such as making the size extremely large, which resulted in an increase in costs.

Further, in the conventional method, the front opening of the main body 1 is heated with a heater (not shown) to prevent sweating, which increases electricity costs and has concerns about quality assurance.

The present invention eliminates the above-mentioned drawbacks and provides a
The purpose is to control the capacitor capacity and capacitor volume during warm operation, to obtain a cooling system suitable for compressor load fluctuations, and to use the heat from the capacitor to prevent sweating without using a heater. It is.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Since the configuration is the same except that the cooling system is different from the conventional one, the same parts will be described with the same numbers as in the conventional one. . The evaporator 5a.

6b are connected in series and connected to an electric compressor 8, a condenser 9, and a first capillary tube 10a to form a cooling system. Instead of the conventional capacitor 9, the first
A capacitor 9a, a second capacitor 9b, and a third capacitor 9c are connected in series. The second capacitor 9b is located at the front opening edge of the main body 1 of the chamber 3b in which the downstream evaporator 5b is installed, and the third capacitor QC is located at the main body 1 of the chamber 3a in which the upstream evaporator 5a is installed. It is installed at the edge of the front opening.

Further, the second capacitor 9b and the third capacitor 9C
1 includes a flow divider 16 integrally formed with a dryer 14, and a refrigerant control valve 1 that is opened and closed by a cold/hot operation selection switching command.
6 are connected in series. The outlet section 17 of the third capacitor 9c is connected to the first capillary tube 10.
connected to a. Further, the second capillary tube 1ob is connected to the flow dividing port 15a of the flow divider 16, forming a bypass circuit 11 including the second capillary tube 10b. In addition, in order to reduce the amount of refrigerant flowing into the bypass circuit 11 when the refrigerant control valve 16 is open, the inlet portion 15a of the second cavity pipe 10b taken out from the flow divider 16
is installed at a higher position than the inlet portion 9c/of the third capacitor 9C, and 7.

Take enough volume in the flow divider 16 and refrigerant control valve 1
The inlet portion of the second capillary tube 1ob is configured so that the gas refrigerant is always used when the circuit 6 is open.The cold-hot switching operation in the above configuration will be described below. When product storage chambers 3a and 3b are both in cooling operation, chamber 3
The operation of the compressor 8 is controlled by a refrigeration thermostat (not shown) that controls the temperature.

At this time, the refrigerant control valve 16 is opened, and the refrigerant flows through the refrigerant circuit indicated by the solid arrow, cooling the evaporators sa and sb and cooling the respective chambers sa and sb.

That is, through the refrigerant control valve 16, the third condenser 9
C, the front opening of each cooled chamber sa, ab is connected to each condenser sb.

Heat dissipation from 9C keeps the temperature high, preventing sweating, )□
・Can be stopped. Also, at this time, the amount of liquid refrigerant in the flow divider 16 is small (the state of the refrigerant at the inlet part 15a of the second capillary tube 10b is gas refrigerant. The state of the refrigerant is completely condensed by 9 degrees in the third condenser 9c and becomes a liquid refrigerant.Therefore, the resistance of the first capillary tube 10a is smaller than the resistance of the second capillary tube 10b. Most of the refrigerant flows through the first capillary tube 1Oa and flows through the second capillary tube 10b.
The amount of refrigerant bypassed to the bypass circuit 11 including
.

6b, and each chamber aa and ab.

Next, a case will be described in which the product storage chamber 3a is heated and the product storage chamber sb is cooled. When the cold/temperature selector switch (not shown) is switched to warm storage, the heating heater 6a is energized and the refrigerant:
, the control valve 16 is closed. Refrigerant control valve 16 closes '1
Then, the refrigerant becomes colder as indicated by the dotted arrow (,,.

flowing through the medium circuit, -', 1. ; Only the rotor 6b is cooled, and the product storage chamber 3b is cooled. At this time, the refrigerating load on the compressor 8 is significantly reduced compared to the time of cold-cold operation, but the refrigerant control valve 16 prevents refrigerant from flowing into the third condenser 9C, reducing the condenser capacity and the condenser 10 mm. Since the slack space is reduced, the condensing temperature will not drop too much or the supercooled liquid will increase and the cooling capacity of the evaporator 6b will not be insufficient due to a lack of refrigerant, and the product storage compartment 3b will be normally cooled. be able to. In addition, unless the refrigerant flows into the third condenser 9c on the side of the product storage room 3a, which is the greenhouse, the third condenser will not be heated due to the influence of the greenhouse, so generation of flash gas can be prevented.

Also, the second condenser 9b on the side of the product storage room ab, which is a cold room.
Since high-temperature refrigerant flows into the product storage chamber 3b, sweating at the front opening of the product storage chamber 3b can be prevented. 1. The temperature of the chamber 3a is controlled by a warm heater 6a and a thermostat for warming (not shown). Next, in the case of both chamber sa and ab co-temperature operation, both chambers 3a.

By setting the selector switch 3b (not shown) to the warm temperature, the compressor is stopped, the warm heaters ea and eb are energized, and the temperature thermostat (not shown) provided in the chamber 3a switches both the temperature heaters 6a, eb is controlled, and both chambers aa and ab are heated.

By performing cold/hot switching control as described above, it is possible to switch the refrigerant circuit and control the capacitor capacity and capacitor polyneum during cold-cold operation and cold-hot operation, so there is no need to increase the size of the accumulator, etc. It becomes possible to obtain a cooling system that is suitable for compressor load fluctuations without having to

In addition, just by switching the cold/hot switch, the product storage compartment 3a can be opened.
, 3b can provide combinations of cold-cold, hot-cold, and hot-hot operations, and one vending machine can sell cold products and hot products at the same time.

Furthermore, exhaust heat from the condenser is used to flow into the second condenser 9b and third condenser 9c during cold-cold operation, preventing sweating in both product storage chambers 3a and 3b, and during cold-hot operation. It flows only into the second condenser 9b installed on the cold room side 3b to prevent sweating. At this time, the greenhouse s
Since the refrigerant does not flow into the third condenser installed on the a side, there is no fear that the condensed refrigerant will be heated.

In this way, the storage of the present invention has two product storage rooms, and by arranging an evaporator and a heater in each of the two rooms and switching between cooling operation and heating operation, it is possible to store refrigerated products and heated products. The evaporators installed in the two chambers are connected in series, and the compressor, the first condenser, the second condenser, the third condenser, and the first
A cooling system is formed by connecting the two evaporators in sequence, a refrigerant control valve is connected between the second condenser and the third condenser, and the refrigerant control valve, the third condenser and the first condenser are connected in series. A bypass pipe is provided via the second capillary tube to bypass the capillary tape and the evaporator on the upstream side, and the refrigerant control valve is controlled to open and close by a cold/temperature changeover switch. With a switch, you can obtain combinations of cold-cold, cold-warm, and hot-hot operation, and one storage unit can simultaneously handle cold products and 1:
1: It is very easy to operate because it allows you to make hot products.
L? 6.61"ff"i < , T"11#*K"1
°°.

Since the refrigerant inflow into the condenser can be controlled, and the condenser capacity and condenser volume can be changed according to the load of the compressor, there is no need to increase the size of the achievator.

In addition, there is no need to adjust the amount of refrigerant, and high-temperature refrigerant can always flow into the condenser on the side that becomes the cold room, which prevents sweating on the edge of the front opening of the cold room. .

[Brief explanation of the drawing]

Fig. 1 is a front view showing the configuration of a cold/temperature operation switching type storage storage according to an embodiment of the present invention, Fig. 2 is a refrigerant circuit diagram of the cooling unit in Fig. 1, and Fig. 3 is an enlarged cutaway of the main parts of the cooling unit. 4 is a cross-sectional view taken along the line A-A in FIG. 1, and FIG.
The figure shows a refrigerant circuit diagram of the cooling unit in FIG. 1...Main body, 3a, 3b...Product storage room, 4a. 4b... Product shelf, sa, sb... Evaporator, ea, eb... Heater, 10a...
...First cavity, 1'□□, 1 Raritube, b...Second capillary tube, 16... Control valve. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Fig. 182 Fig. 3 Fig. 4 b

Claims (1)

[Scope of Claims] Two storage chambers are formed in the main body, a cooling evaporator and a heating heater are respectively disposed in the two chambers, and a changeover switch is provided to switch between refrigeration and heating operation, The evaporators installed in two chambers are connected in series, and the compressor, first capacitor, second capacitor, third capacitor, and first capacitor are connected in series.
and a series circuit of the evaporator to form a cooling system, the cooling system comprising:
A refrigerant control valve is connected between the second condenser and the third condenser, and a bypass pipe is provided that bypasses the refrigerant control valve, the third condenser, the first capillary tube, and the upstream evaporator. The second condenser is provided via a second capillary tube, and the refrigerant control valve is opened and closed by the cold/temperature changeover switch, and the second condenser is located at the front opening edge of the main body of the chamber in which the evaporator is installed on the downstream side.
The third condenser is a cold/hot storage that is installed at the front opening edge of the main body of the chamber where the upstream evaporator is installed.