JPS6020069A - Refrigeration-heating 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 Field of the Invention The present invention relates to a refrigerated/hot storage type storage unit that switches between cooling and heating items in a vending machine or the like.

Configuration of conventional example and its problems Conventionally, vending machines have been generally known as this type of refrigerated/hot storage. Explained for reference.

In the following description, refrigerated storage will be referred to as cold storage, and heated storage will be referred to as hot storage.

1 is the main body of the vending machine consisting of a heat insulating wall 2;
The interior of the storage compartment is divided into two storage compartments 3a on the left and right.

It is divided into 3b. Each of the storage rooms sa and ab is provided with product shelves 4a and 4b such as serpentine trucks, respectively. Also, a storage room 3a.

3bK are evaporators 5a and 6b for cooling, respectively.

Heaters 6a, 6b for heating, and fans 7a, 7b for forcibly circulating cool air and warm air in the storage chambers 3a, 3b are arranged. Evaporators 5a and 6b disposed in each storage chamber 3a and 3b are connected to each other in parallel. Also, Conrunosa 8. capacitor 9
2 flow divider 10. It is connected to the capillary tube A11a and the evaporator 6a. Furthermore, the flow divider 10. Capillary tube B'l'? b.

A cooling system is formed by sequentially connecting with the evaporator 6b. In the evaporator 5a, in addition to the capillary tube A11a, another capillary tube C11C is arranged in parallel.

Then, the combined resistance of the capillary tube A 11 a and the capillary tube C11C is the evaporator 5
d is an appropriate value for independent operation. In addition, the capillary tube B11b and the capillary tube C11
A solenoid valve 12a is provided at the inlet of C.

12b is provided. The solenoid valve 12a.

12b is opened and closed by an electric signal based on a cold/hot operation selection switching command.

In the above configuration, when both the storage chambers 3a and 3b are in cooling operation, the solenoid valve 12b is opened and the solenoid valve 12a is closed, and the refrigerant flows through the refrigerant circuit indicated by the solid arrow in FIG.
a, ab was being cooled.

When operating the storage compartment 3a in a cold state and the storage compartment 3b in a warm state, the refrigerant flows through the refrigerant circuit indicated by the dotted arrow by opening the solenoid valve 12a and closing the solenoid valve 12b. And capillary tube A11a and capillary tube C
The storage chamber 3a is operated in a cold manner by setting a resistance value appropriate for cooling the evaporator 5a by the parallel circuit of 11C. Also,
The storage chamber 3b is heated by the heater 6b. When both storage chambers 3a and 3b are in hot operation, the compressor 8 is stopped and both storage chambers aa and 3b are operated by heaters ea and 6b.
, sb performs warm operation.

As described above, by selecting and energizing the heaters ea and eb, the compressor 8, and the solenoid valves 12a and 12b, the storage chambers 3a and 3b are cooled to cold and cool 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, the solenoid valves 12a and 12b must always be kept in opposite states, and one of the solenoid valves is always energized, resulting in high power consumption. Moreover, even if only one of them is defective, the entire system becomes defective, resulting in poor reliability. In addition, the cost was high, and the reliability of the solenoid valve was low due to malfunctions due to disconnection of the solenoid.

Purpose of the Invention Therefore, the present invention eliminates these drawbacks and provides a refrigerant system that can be controlled without the need for a solenoid valve, has low manufacturing costs, low power consumption, and has high reliability.
The purpose is to obtain storage rhinoceroses that can be switched between cold and hot.

Structure of the Invention In order to achieve this object, the present invention 1.1-1 switches the capillary tube by operating a heat-operated switching valve using a heater on the side of the storage room that performs warm operation. The electrical circuit has been simplified to improve reliability.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3, 4, and 5, but it is the same as the conventional one except for the cooling system and the electrical 1 μm path. , the same parts in this cooling system and electric circuits are given the same numbers, and detailed explanation thereof will be omitted.

13 is a thermally actuated switching valve (hereinafter referred to as a valve), and casing A14. Valve seat part 15. Casing B16 and valve lid 1
It has 7. The casing A14 has a first outlet 1
8. The casing B16 has a second outlet 19. An inlet 20 is provided in each of the valve seat portions 16 .

Further, the inlet 20 is connected to the flow divider 10, the first outlet 18 is connected to the capillary tube B11b, and the second outlet 19 is connected to the capillary tube C11C. 33
is installed in the casing A14 with a bellows, is connected to the heat sensitive part 21 arranged for heat exchange with the heater 6b provided in the storage chamber 3b, and forms a sealed part 22 with the valve fi C17. are doing.

The bellows 33 is adhesively fixed to the valve body A23, and its tip 24 is slidably inserted into the hole 26 of the valve body B25. Further, the valve body B25 is slidably inserted into the hole 27 of the casing B16, and the valve body B25 is slidably inserted into the hole 27 of the casing B16.
A spring 28 is provided between the valve body B25 and the valve body B25.

And compressor 8. Capacitor 92 Shunt 10.
The capillary tube 11a forms a cooling system with the porator 5a, and is connected to the evaporator 6a with the flow divider 10.valve 13.capillary tube 11C2.

Q forming a cooling system with the evaporator 16b Next, the electric circuit will be explained with reference to FIG. 29d.

Reference numeral 29b denotes switches A and E for switching between cold and hot, which work together to switch the respective storage chambers 3a and 3b between cold and cold, cold and warm, and warm.
Set the temperature and operating status. A cold thermostat 30 is disposed in the storage room 3a, connected in series with a compressor 8 and a condenser fan 31 connected in parallel, and connected to a power source via a switch A 29a. 32a and 32b are a pair of Wenzhou thermostats; one Wenzhou thermostat 32a is placed in the storage chamber 3a, and the switch A 29a and the heater 6a
connected in series with. The other Wenzhou thermostat 32b is disposed in the storage room 3b, and the switch B
29bK and is connected in series to the heater 6b. Further, 27 pins 7a and 7b are respectively connected to a power source.

The operation will be explained in Doi + n formation. Each storage room 3a, 3
When performing cold-cold operation, the switches 29a and 29b are set to the cold operation side (C side in FIG. 4). Thank you for this,
The compressor 8 is started, and the refrigerant is transferred to the condenser 92 and the shunt 10. Capillary tube Af1a, evaporator 5a
The flow cools the storage chamber 3a.

Further, the temperature of the heat sensitive part 21 is low because the heater 6b is not energized, and the urging force of the spring 28 is strong compared to the pressure in the sealed part 22. The internal pressure of the valve 13 causes the bellows 34 to open the valve body A23. are doing.

Therefore, the storage chamber 3b is cooled by the flow of refrigerant from the flow divider 10 through the valve 13° capillary tube B11b and the evaporator 6b.

Then, the valve body E26 is moved only by the biasing force of the spring 28.
It is pressed against the valve seat part 16 and is closed. Therefore, there is no refrigerant flowing into the capillary tube C11C.

Next, a case where the storage chamber 3a is cold and the storage chamber 3b is warm will be explained. When the switch A 29a is set to the rich side, the heater 6b is energized and the compressor 8 is also operated. Since the heat sensitive portion 21 of the valve 13 is disposed in the heater 6b for direct heat exchange, the pressure inside the sealed portion 22 increases as the temperature of the heater 6b increases. This pressure becomes greater than the biasing force of the spring 28. Then, the tongue 34 presses the valve body A 23 f against the valve seat portion 16 to close the circuit.

The valve body B25 has the tip 24 of the valve body A23 connected to the child I, 2.
6, and is pushed down and opened by the movement of the valve body A23. Through the above series of operations, the refrigerant flow is controlled by valve 1.
Since the refrigerant flows in through the inlet 20 of 3 and flows out through the second outlet 19, there is no outflow of the refrigerant from the first outlet 18, the evaporator 6b is not cooled, and the storage chamber 3b is heated by the heater 6b and is operated at a high temperature. Ru.

At this time, two capillary tubes A11a and two capillary tubes CIIC are connected in parallel to the evaporator 6a. In this state, the combined secondary resistance of the two capillary tubes 11a and 11b is the evaporator 6a.
The capillary tube C11C is adjusted to provide appropriate resistance during independent operation. The refrigerant is then transferred to the flow divider 10 through the capillary tube A11a and the valve 13. Both flow through gear pillar tube C11C,
It flows into the evaporator 6a and cools the chamber 3a. In addition, when each storage room sa, sb is operated at temperature (switch B2 is
The compressor 8 is stopped by heating the compressor 9b (1!IC Fig. 4 JU!l), and the heater 6a is turned off.

6b is energized.

23. To the valve body of valve 13. The valve body B25 is connected by the tip 24 of the valve body A23, but if a large pressure difference occurs between the internal pressure of the valve 13 and the internal pressure of the sealing part 22, and the bellows 33 contracts beyond the stroke of the valve body B25. , tip 2
4 is slidably inserted into the hole 26 of the valve body B25, so that no unreasonable force is applied to the valve bodies B and 25.

Therefore, only by operating the switch for cold/hot switching, the operation combinations of cold/cold, cold/hot, and warm/hot storage compartments can be obtained, and malfunctions due to mistakes in switching operations can be prevented. Furthermore, since the opening/closing operations of the two solenoid valves are combined into one switching valve, the reliability of the mutual operations is improved, and the amount of power consumed by the input of the solenoid valves is reduced. Further, when operating in a cold state, an appropriate flow rate of refrigerant can be obtained by changing the capillary tube resistance on the side of the cold state.

As is clear from the explanation in J2, the present invention has two storage chambers each having an evaporator for cooling and a heater for heating, and each storage chamber is switched to cold/vortex mode. It is equipped with a switching switch, an evaporator, a compressor, a condenser, a shunt, and a capillary tube installed in each of the storage chambers and connected in parallel. A thermally actuated switching valve is installed upstream of the tube and the capillary tube of the other evaporator, and the thermally actuated switching valve is
a heat-sensitive part arranged in heat exchange with the heater in the storage chamber, the heat-sensitive part forming a sealing part connected to a bellows, the bellows being provided with 1. It is equipped with two valves that control the flow of refrigerant, so it can be cooled or cooled simply by operating a switch.
A combination of cold-hot and hot-hot operation is available, and a thermally actuated switching valve that operates depending on the heater temperature is used.
Since the refrigerant flow can be switched only by energizing the heater, erroneous opening/closing operations due to switching errors can be prevented. In addition, since the opening/closing operation of two solenoid valves in the conventional example is replaced with one switching valve, the reliability of the mutual switching operation is improved, and the power consumption due to the input of the solenoid valve is reduced. By changing the capillary tube resistance on the cold operation side during cold-hot operation, effects such as obtaining an appropriate refrigerant flow rate can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a schematic front sectional view of a conventional vending machine, Fig. 2 is a piping diagram of the cooling system shown in Fig. 1, and Fig. 3 is a schematic front sectional view of a vending machine showing an embodiment of the present invention. , FIG. 4 does not show the piping diagram of the cooling system shown in FIG. 3, and FIG. 5 does not show the electrical circuit diagram shown in FIG. 3. s a', 3b...Storage room, 5a, 6b.
...Evapo 1/-ta, 8a', 6b...
Heater, 8... Compressor, 9... Capacitor, 10... Shunt, 11a... Capillary tube A111b... Capillary tube B111C...・Capillary tube C1
13...Heat-operated switching valve, 33...Bellows,
21... Heat sensitive part, 22... Sealing part, 23
．． 25...Valve body, 29a, 29b...
·switch. 4 Lee! Names of 11 people Patent attorney Toshio Naka Novo and 1 other person 5b Figure 3 Figure 4 Figure 5 2qα 30

Claims (1)

[Claims] The evaporator for cooling and the heater for heating are each IRj.
two storage compartments, a switch for switching each storage compartment between refrigerated storage and hot storage, a thermally actuated switching valve having a heat sensitive part that controls the flow of refrigerant, and a compressor that circulates refrigerant to each of the evaporators. , a cooling system such as a condenser, a capillary tube, etc., the evaporators are connected in parallel to form the cooling system through each of the thermally actuated switching valves, and a heat sensitive part of the thermally actuated switching valve is connected to the evaporator in parallel. A refrigeration system equipped with a capillary tube installed in heat exchange with the heater in one storage compartment, connected to the evaporator in the other storage compartment, and bypassing the capillary tube in the other storage compartment and the thermally actuated switching valve. Warm storage switchable storage. ,