JP3465297B2 - vending machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to two storage rooms for goods.
Each is based on a vapor compression refrigeration cycle,
Each storage as operated in cooling or cooling mode.
Turn off the refrigerant flow between the indoor heat exchanger and the outdoor heat exchanger.
To replace the capillary tube, electronic expansion valve,
Automatic sales using a refrigerant flow divider consisting of a combination of magnetic valves
About the machine. [0002] 2. Description of the Related Art A conventional example will be described below with reference to the drawings.
Will be described. FIG. 7 is a configuration diagram of a conventional example. Figure smell
For the sake of simplicity, two compartments 1, 2 are
Each is configured for both heating and cooling.
One of the containment chambers 1 and 2 has a mixed type for heating and the other for cooling.
And the case where all the rooms are heated for heating.
In some cases, an all-room cooling type for cooling is used. Well, even if
For example, containment room 1 adopts a mixed type for heating and containment room 2 for cooling
Sometimes, the refrigeration cycle is installed in the indoor heat exchanger 11 of containment room 1.
Function as a condenser for indoor heat exchange in containment room 2.
The device 12 has a function as an evaporator of a refrigeration cycle,
The outdoor heat exchanger 4 functions as a condenser for the refrigeration cycle.
To have. At this time, the refrigeration cycle cools containment chamber 2.
The main operation is to heat storage room 1
Can indoor heat exchanger 11 alone be insufficient?
Accordingly, an auxiliary heater 31 is provided. Both containment rooms 1 and 2 are
For heat use, the indoor heat exchangers 11 and 12 in each containment room 1 and 2
In addition, both have a function as a condenser of the refrigeration cycle,
The outdoor heat exchanger 4 has a function as an evaporator for the refrigeration cycle.
To have. At this time, the refrigeration cycle
2 work together to heat both indoor heat exchangers 11,1
2 is sufficient, and the operation of each auxiliary heater 31, 32 is necessary
Absent. FIG. 7 shows the configuration of a conventional example.
It will be described with reference to FIG. One containment room 1 has indoor heat exchange
Exchanger 11, blower 21, auxiliary heater 31, temperature sensor 41
Is installed, the solenoid valve 69 and electronic expansion are installed in the indoor heat exchanger 11.
The valve 7 is connected in series, and this is connected in parallel with the check valve 8.
Connected. The other storage room 2 has an indoor heat exchanger 12 and
The blower 22, the auxiliary heater 32, and the temperature sensor 42 are installed.
The solenoid valve 70 and the electronic expansion valve 7 are connected in series to the indoor heat exchanger 12.
Then, a parallel connection of this and the check valve 8 is connected.
In addition, on both sides of each containment room 1,2, these are used for heating or cooling.
The flow of the refrigerant, as described in more detail below.
Switching units 61 and 62 are installed. these
In addition, as a common unit, a compressor 3 and a four-way valve 6
, Check valve 8, accumulator 9, outdoor heat exchanger 4
And the set of the blower 5 and the electronic expansion valve 7 and the check valve 8
Refrigeration cycle is composed as a whole with paralleled pairs
Is done. Here, the check valve is indicated by a diode symbol.
And the refrigerant can flow only in the forward direction. Ma
In addition, sales and release of cans 10 for heated products are common to each containment room 1 and 2.
A heating receiver 50 for final heating is installed before
You. The heating receiver 50 will be described in detail later.
A component of induction heating equipment that receives high-frequency current
Coil is formed into a concave shape, and the stage prior to selling and selling the can 10
To be placed. If the can 10 is a cooled product,
The heat receiver 50 is not used. [0004] Each of the switching units 61 and 62 will be described.
FIG. 8 is a configuration diagram of a switching unit 61 in a conventional example, and FIG.
FIG. 7 is a configuration diagram of a switching unit 62 in a conventional example. Switching unit
The knit 61 is, as shown in FIG. 8, a solenoid valve and a check valve.
FIG. 9 shows the four combinations of
As shown, six sets of solenoid valve and check valve sets
Combine. Each switching unit 61, 62
By selectively opening and closing 71 to 80, the flow of refrigerant can be converted.
Can be. Which solenoid valve should be opened and closed to control the refrigerant flow
Whether to convert is described in the description of the conventional operation
Will be described. [0005] The operation of the conventional example is different from the storage for heating and the storage for cooling.
When there are mixed rooms, and when both are storage rooms for heating,
Each is explained separately, and both are used for the storage compartment for cooling.
In the case of, the description is omitted. Figure 10 shows a conventional example for heating and cooling
FIG. 6 is an operation diagram when the storage rooms are mixed. Figure smell
It is assumed that containment room 1 is for heating and containment room 2 is for cooling.
You. Room temperature of heating containment room 1 (preheating temperature of product) is higher
Controlled at a lower limit of 37 ° C and a lower limit of 33 ° C, the room for cooling containment room 2
The temperature (cooling temperature of the product) is controlled at an upper limit of 7 ° C and a lower limit of 1 ° C
Is done. Solid arrows along the piping indicate the flow of condensed refrigerant.
The broken arrows indicate the flow of the evaporated refrigerant. Case
The indoor heat exchanger 11 in the delivery room 1 functions as a condenser,
2 indoor heat exchanger 12 functions as an evaporator,
The vessel 4 functions as a condenser. Compressed by compressor 3
The high-pressure gas refrigerant flows through the four-way valve 6 to the outdoor heat exchanger 4
Flow, after partial heat dissipation, through check valve 8
The switching unit 62 is reached. The condensed refrigerant is
As shown by a solid line arrow in FIG.
To the electronic expansion valve 7 in the containment chamber 2
Then, it expands into a low-pressure two-phase refrigerant, and the indoor heat exchanger
Vaporization by absorbing heat from the room at 12 and cooling the room
Easy. Here, the solenoid valve 69 of the storage room 1 is closed and the storage room 1 is closed.
The second solenoid valve 70 is opened. This evaporated refrigerant is supplied to the switching unit.
It flows out of the left mouth through port 61 and reaches the four-way valve 6, where
The accumulator 9, check valve 8,
And returns to the compressor 3, where it is compressed and
Becomes a refrigerant. In this case, the indoor heat exchange of one containment room 1
The heat exchanger 11 serves as a condenser and the other heat exchange room 2
Since the vessel 12 operates as an evaporator, thermal mutual use is improved.
This saves overall power consumption. Incidentally, the cooling by the switching units 61 and 62
The flow of the medium is determined by the opening and closing of the solenoid valve inside it.
You. For the operation of FIG. 10, the switching unit 61 (see FIG. 8)
), Solenoid valves 71, 72, 73: closed, solenoid valve 74: open, switching
In the knit 62 (see FIG. 9), the solenoid valves 75, 77, 78, 79, 80:
Closed, solenoid valve 76: open. And solenoid valve
76 is the room temperature measurement by the temperature sensor 42 of containment room 2 and the upper limit
Pertaining to the cooling of containment chamber 2 based on a value of 7 ° C and a lower limit of 1 ° C.
Open / close according to ON / OFF control of control unit not shown
Is done. With the closing of the solenoid valve 76, the compressor 3 was stopped.
Then, the flow of the condensed refrigerant related to the indoor heat exchanger 11 of the containment chamber 1
As a result, the room temperature of containment room 1
If the lower limit of the heating temperature is lower than 33 ° C, the control unit
The auxiliary heater 31 is turned on to perform auxiliary heating. Ma
In addition, the room temperature of containment room 1 must not exceed the upper limit of 37 ° C for the preheating temperature.
Above and when the condensed refrigerant flows through the indoor heat exchanger 11
Stops the blower 21 to substantially reduce the function of the indoor heat exchanger 11.
To stop and warm up Containment Room 1.
To do. [0007] Now, when the above operation is performed,
The transition of the room temperature of containment rooms 1 and 2 will be described with reference to FIG.
explain. Fig. 12 shows a conventional example where the heating and cooling storage chambers are
It is a time chart of the room temperature of each storage room when mixed.
You. In the figure, the upper diagram corresponds to containment room 1 and the upper limit
Temperature is maintained at room temperature with an average of 35 ° C within the range of 37 ° C and the lower limit of 33 ° C.
In other words, product cans are also kept at an average of 35 ° C (preliminary heating).
Heat). The temperature of the can at the time of sale is 60 ℃
So, as already mentioned, before the sale launch,
Placed on a heating holder 50 (see Fig. 7) belonging to the induction heating device
At the same time, it is rapidly heated to the sales temperature of 60 ° C.
The lower diagram corresponds to containment room 2, and the upper limit is 7 ° C,
It is maintained at room temperature of 4 ° C on average within the limit of 1 ° C.
In other words, the product cans are also cooled to an average of 4 ° C. By the way, each storage for heating and cooling described above is performed.
When the chambers are mixed, the auxiliary heater 31 of the heating
The temperature sensor 41 can be omitted. That is, cold
Is rejected based on the output of the temperature sensor 42 in the cooling containment room 2.
The indoor heat exchanger as an evaporator depends on the function of the control unit.
The cooling is performed to a predetermined temperature via the
Therefore, the product in the heating containment room 1 is used as a condenser.
Functionally heated by the functioning indoor heat exchanger 11
The heating temperature is generally out of the specified preheating temperature.
You. However, this product was added before the next sales launch.
Since it is finally heated to a predetermined temperature by the heat receiver 50,
This is not a problem. Next, when both storage rooms 1 and 2 are used for heating,
In the conventional example, the behavior when all containment rooms are for heating
This will be described with reference to FIG. In the figure,
Indoor heat exchangers 11 and 12 in each containment room 1 and 2 function as condensers
Then, the outdoor heat exchanger 4 functions as an evaporator. Compressor 3
The high-pressure gas refrigerant compressed by the
To the replacement unit 61, and through this, as indicated by the solid line arrow,
It flows through the indoor heat exchangers 11 and 12 belonging to each containment room 1 and 2,
To release heat and warm each room. The condensed refrigerant is then
To reach the electronic expansion valve 7 via the switching unit 62,
It expands here to become a low-pressure two-phase refrigerant as indicated by the dashed arrow,
The outdoor heat exchanger 4 absorbs heat from the outside air. After that, steam
The generated refrigerant reaches the four-way valve 6, through which the accumulator
9, return to the compressor 3 through the check valve 8, where it is compressed and
And high-pressure gas refrigerant. In this case, one storage room 1
The indoor heat exchanger 11 is also the indoor heat exchanger of the other containment room 2.
Since both 12 operate as a condenser, they can be used thermally
Is not done. Here, each storage room 1, 2
Each solenoid valve 69, 70 is closed. But each containment room
In 1,2, the product is heated to 35 ℃ which is considerably lower than the final temperature of 60 ℃,
It is kept warm and the final temperature here is 60 ° C as in the conventional example.
Power consumption here.
Get out. And in the final stage, induction heating method with high thermal efficiency
The final heating by the formula gives a temperature of 60 ° C.
The overall power consumption with the induction heating device is
More reduced. Incidentally, the cooling by the switching units 61 and 62
The flow of the medium is controlled by opening and closing the solenoid valve inside it.
You. For the operation of FIG. 11, the switching unit 61 (see FIG. 8)
), Solenoid valves 72 and 74: closed, solenoid valves 71 and 73: open,
In the switching unit 62 (see FIG. 9), the solenoid valves 75, 76, 78, 79, 8
0: closed, solenoid valve 77: open. Moreover,
The solenoid valves 71 and 73 of the replacement unit 61
The room temperature was measured by the temperature sensors 41 and 42 in each containment room 1 and 2.
Released at different times based on the measurements. In other words
For example, the room temperature of each of containment rooms 1 and 2 cannot be lower than the lower limit.
No. However, each solenoid valve 71, 73 has a
Closed synchronously when the temperature exceeds the upper limit of 37 ° C
You. In other words, one of the storage rooms 1 and 2 first
It reaches the upper limit of 37 ° C, and the other reaches the upper limit of 37 ° C with a delay
At this time, the solenoid valves 71 and 73 close and stop heating.
Become. At that time, the room temperature that reached the upper limit of 37 ° C first
Dry, higher than the upper limit of 37 ° C, but room temperature here is reserved
Heating, final heating to 60 ° C in a later process
No problem from. Now, when the above operation is performed,
The transition of the room temperature of containment rooms 1 and 2 will be described with reference to FIG.
explain. Fig. 13 shows a conventional example where all storage rooms are for heating
6 is a time chart of the room temperature of each storage room. Figure smell
The thick solid line is in containment room 1 and the thin solid line is in containment room 2.
Each corresponds. Therefore, the room temperature of containment room 1
Maintain at an average temperature of 35 ° C within the limits of 37 ° C and lower limit of 33 ° C
In other words, the product cans are kept at an average of 35 ° C (preliminary heating).
Heat), but the room temperature of containment room 2 is
This is consistent with the lower limit, but only slightly at the upper limit.
Exceeded, resulting in the average temperature slightly exceeding the target of 35 ° C.
And However, as already mentioned, the temperature of
There is no practical problem since the final heating is performed. By the way, means for final heating is described.
This will be described with reference to FIG. Figure 14 shows the heating fixture
(A) is a side view thereof, and (b) is a plan view thereof. Addition
The heat receiver 50 is wound in a substantially rectangular spiral shape.
A coil formed into a semicircle along the long side
You. Extending to the upper right is a leader line. One-dot chain line products
Cans 10 with beverages already at 35 ° C in the heating containment room
In the pre-heated state, transferred and bent of the heating receiver 50
Placed in a recess, where it is sold after being finally heated to 60 ° C
Be thrown out. A high frequency power supply (not shown) is connected to the coil.
Subsequently, a high-frequency current is applied to generate an AC magnetic field.
With this alternating magnetic field, the can 10
Inside, an eddy current flows, which causes Joule heat
Is heated. To get a certain final temperature here
Is a temperature sensor (shown in FIG.
It is accurate to control based on the output of (not done).
In addition, it is also possible to simply depend on the heating time (mounting time)
It is. By the way, the magnitude of the eddy current,
The amount of heat generated depends on the rate of change of the magnetic field,
It is proportional to frequency. This induction heating has a thermal efficiency close to 80%.
It is very expensive and clean. [0013] In the conventional example, a heating mode is used.
For each operation in the cooling mode or cooling mode.
Switch the refrigerant flow between the heat exchanger and the outdoor heat exchanger
For this reason, various valves such as electronic expansion valves, solenoid valves, and check valves are used.
In particular, electronic expansion valves are expensive and check
Although the price of the valve is relatively low, the number of valves used is as large as 14 pieces. The object of the present invention is to overcome the problems of the prior art.
The two product storage rooms are
Heating mode or cooling based on gas compression refrigeration cycle
Indoor heat exchange in each containment room as it is operated in mode
To switch the flow of refrigerant between the heat exchanger and the outdoor heat exchanger
And the number of various valves used as a whole
A vending machine that can be reduced in size and cost.
To provide. [0015] An automatic vending machine according to claim 1.
The outdoor heat exchange can function as an evaporator or condenser
And an evaporator installed in each of the two storage compartments
Or including an indoor heat exchanger that can function as a condenser
A vapor compression refrigeration cycle is formed, and each indoor heat exchanger
The corresponding temperature control of the containment chamber is performed by starting and stopping.
In two vending machines, two solenoid valves are connected in series.
First and second piping systems connected to each other; two other electromagnetic systems
The valve and the two capillary tubes are connected to one solenoid valve, one
One capillary tube, the other capillary tube,
Third piping system connected in series in the order of the other solenoid valve
And are connected in parallel, and are connected to the first and second piping systems.
First and second midpoints as connection points for each solenoid valve
And the connection points of each capillary tube in the third piping system
Of the third midpoints as places, the first midpoint, the third midpoint,
Are connected via an electronic expansion valve, and the second midpoint and the third
The first, second, and third piping systems are connected to the middle point.
And each end of the indoor heat exchanger
Are connected to one end, respectively, and a first midpoint and an outdoor
One end of the heat exchanger is connected via another solenoid valve.
Each solenoid valve is connected to each indoor heat exchanger by an evaporator.
Or function as a condenser and the room temperature setting for each containment room.
A shunt that opens and closes based on a deviation from a constant value;So
Fourth and fifth solenoid valves each having two solenoid valves connected in series.
Each of the fourth and fifth pipe systems is connected in parallel.
The fourth and fifth connection points of each solenoid valve in the piping system
Are connected to the discharge pipe and the suction pipe of the compressor, respectively.
The fourth and fifth piping systems are connected in parallel.
Each end of the heat exchanger and one end of each indoor heat exchanger
Are connected to each other, and the fourth or fifth
One of the midpoints is connected to one end of the outdoor heat exchanger.
Are connected via another solenoid valve.
The function of each indoor heat exchanger acting as an evaporator or condenser
Separately and based on the deviation of each containment room from the set value of room temperature
Piping path opened and closedIs provided. [0016] In the vending machine according to claim 1, (1) each indoor heat
When both exchangers function as evaporators, refrigerant
From the outdoor heat exchanger as a contractor, to the electronic expansion valve of the flow divider
It is divided into two through the third middle point,
After passing through each branch, it flows into each indoor heat exchanger, and (2)
When both heat exchangers function as condensers,
From each indoor heat exchanger, through each branch of the second piping system,
At a point, pass through a third midpoint, pass through an electronic expansion valve, and then evaporate.
It flows to the outdoor heat exchanger as a generator, and (3) each indoor heat exchanger
When one functions as an evaporator and the other functions as a condenser,
The first refrigerant is supplied from the other indoor heat exchanger as a condenser.
1st midpoint through one branch of pipe system, electronic expansion valve, 3rd middle
After passing one point and passing through one branch of the third piping system, the evaporator
As it becomes possible to flow into one indoor heat exchanger
And the diversion corresponding to each of the cases (1), (2) and (3)
Each solenoid valve of the vessel
Is opened and closed based on the
The heat exchanger is started and stopped, and the temperature of each storage room is controlled. [0017] DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vending machine according to the present invention will be described.
This will be described below with reference to the drawings. FIG. 1 shows an embodiment.
It is a block diagram. The difference between the embodiment and the conventional example is that FIG.
Electronic expansion valve 7, check valve 8, and electromagnetic
With the exception of valves 69 and 70, each switching unit 61 and 62 is replaced with a separate
The flow valve 63 is installed, and the solenoid valves 97 to 102 are newly
It was established. Therefore, other corresponding parts
Are denoted by the same reference numerals as in the conventional example.
The description is omitted.Configuration of each solenoid valve 97-102
Will be described with reference to FIG. Solenoid valve 97 and solenoid valve 99
And the solenoid valve 98 and the solenoid valve 100 are connected in series.
The fourth and fifth piping systems are connected in parallel, and the fourth piping system
The midpoint of the four-way valve 6 is
It is connected to one end of each. The fourth piping system, and
And the fifth piping system are connected to each end
Each end of the internal heat exchanger is connected,
The middle point between the solenoid valve 98 and the solenoid valve 100 is one side of the outdoor heat exchanger 4.
Is connected to another end through another solenoid valve 101.
You. The structure of the shunt 63 is shown in FIG.
It will be described with reference to FIG. In FIG. 2, first,
Third and second three piping systems are connected in parallel. First,
Each of the second piping systems includes a solenoid valve 91, 94 and a solenoid valve.
93 and 96 are connected in series, and the third piping system is a solenoid valve 92
Capillary tube 111, capillary tube 112, solenoid valve 95
Are connected in series in that order. Each of the first and second piping systems
The connection point of the solenoid valve is set to the first and second midpoints, and the third piping
The connection point of each capillary tube 111, 112 of the system
Assuming that the middle point is the first middle point and the third middle point, the electronic expansion valve 110
Are connected via the second intermediate point and the third intermediate point
You. Returning to FIG. 1, the flow divider 63 has its first, second, third
Side of each solenoid valve 91, 92, 93 connected in parallel with each piping system of
And the right end of the indoor heat exchanger 11 corresponding to the storage room 1.
Are located on the sides of the solenoid valves 94, 95, 96 and the room corresponding to the storage room 2.
The right end of the heat exchanger 12 is connected to each
1 The middle point and the right end of the outdoor heat exchanger 4
Connected via The flow of the refrigerant depends on the operation mode of the embodiment.
Switching by selectively opening and closing each solenoid valve according to the
The specific operation will be described later. Each of the storage compartments 1 and 2 is operated in a cooling mode.
When all the storage rooms in Fig. 3 are used for cooling
This will be described with reference to the operation diagram. In the figure, the thick solid line
Indicates the flow of the refrigerant, and the symbol C of each of the storage chambers 1 and 2 indicates the cooling
Show. The indoor heat exchangers 11 and 12 in each containment room 1 and 2 are both steam
Functions as a generator and outdoor heat exchanger 4 functions as a condenser
I do. The driving operation is as follows. By compressor 3
The compressed high-pressure gas refrigerant passes through the four-way valve 6 and exchanges outdoor heat.
And reaches the vessel 4 where it releases heat to become a high pressure liquid refrigerant. This
High-pressure liquid refrigerant reaches the electronic expansion valve 110 of the flow divider 63,
This expands into a low-pressure two-phase refrigerant and branches, one of which is distributed
Chamber through a capillary tube 111 for
The internal heat exchanger 11 and the other the capillary tube 11 for distribution
2 and the indoor heat exchanger 12 through the solenoid valve 95.
Be placed. Note that the control unit (not shown) controls the flow divider.
Each solenoid valve 91, 93, 94, 96 belonging to 63 is always closed. same
Control, the solenoid valves 98 and 100 in the piping path are always
Closed and each solenoid valve 97,99,101,102 is always open. Ma
The solenoid valves 92 and 95 belonging to the flow divider 63 are controlled by the control unit.
Of the corresponding storage chambers 1 and 2 by the temperature sensors 41 and 42
It is opened and closed based on the temperature measurement to create indoor heat exchangers 11 and 12.
Move and stop. As a result, the temperature of each storage room 1 and 2 is set
On / off control is performed according to the value. In addition, each indoor heat exchange
Evaporated refrigerant that has passed through devices 11 and 12 passes through four-way valve 6 and accumulates.
The compressor 9 and the check valve 8 return to the compressor 3 where the compressed
To become a high-pressure gas refrigerant again. Each of the storage compartments 1 and 2 is operated in the heating mode.
When all containment rooms in Fig. 4 are used for heating
This will be described with reference to the operation diagram. In the figure, the thick solid line
Indicates the flow of the refrigerant, and the symbol H of each of the storage chambers 1 and 2 indicates the heating
Show. Both indoor heat exchangers 11 and 12 in containment rooms 1 and 2
Outdoor heat exchanger 4 functions as an evaporator
I do. The driving operation is as follows. By compressor 3
The compressed high-pressure gas refrigerant flows through the four-way valve 6 to each of the storage compartments 1,
Flow through the indoor heat exchangers 11 and 12 belonging to
Then, each of the storage chambers 1 and 2 is heated to become a high-pressure liquid medium. This high
The pressurized liquid medium flows through the solenoid valves 93 and 96 of the flow divider 63 to the electronic expansion valve.
110, where it expands into a low-pressure two-phase refrigerant,
Flow through the outdoor heat exchanger 4 through the magnetic valve 102, where heat is absorbed
And evaporate. Note that the control unit (not shown)
The solenoid valves 91, 92, 94, 95 belonging to the vessel 63 are always closed.
Similarly, the solenoid valves 98 and 100 in the piping path are always
And the solenoid valves 97, 99, 101, 102 are opened. Ma
The solenoid valves 93 and 96 belonging to the flow divider 63 are controlled by the control unit.
Of the corresponding storage chambers 1 and 2 by the temperature sensors 41 and 42
It is opened and closed based on the temperature measurement to create indoor heat exchangers 11 and 12.
Move and stop. As a result, the temperature of each storage room 1 and 2 is set
On / off control is performed according to the value. Through the outdoor heat exchanger 4
The evaporated refrigerant passes through the four-way valve 6, accumulator 9,
Return to the compressor 3 via the valve 8, where it is compressed and re-pressurized
Become a gas refrigerant. Storage room 1 is in cooling mode, storage room 2 is heated
One of the storage rooms in FIG. 5 when operating in the mode
For cooling and the other for heating.
I will explain. In the figure, the thick solid line indicates the flow of the refrigerant.
The symbol C for the storage room 1 is for cooling, and the symbol H for the storage room 2 is
Shown for heating respectively. The indoor heat exchanger 11 in containment room 1
The indoor heat exchanger 12 in containment room 2 serves as a generator and a condenser.
And the outdoor heat exchanger 4 is stopped. luck
The rolling operation is as follows. Compressed by compressor 3
The high-pressure gas refrigerant passes through the four-way valve 6 and
It flows through the internal heat exchanger 12, where it releases heat and heats the containment room 2.
It becomes a high-pressure liquid refrigerant. This high-pressure liquid refrigerant is
The solenoid valve 94 reaches the electronic expansion valve 110, where it expands.
It becomes a low-pressure two-phase refrigerant. This low-pressure two-phase refrigerant is
After passing through the tube 111 and the solenoid valve 92, indoor heat exchange in the containment room 1
Flows through the vessel 11 and absorbs indoor heat, evaporates, and cools the containment chamber 1.
Reject. Each of the solenoid valves 91, 93, 95, 96 belonging to the shunt 63
Is always closed by the control unit. Similarly, the control unit
Therefore, each solenoid valve 98, 99, 101, 102 in the piping path is always closed.
Then, each solenoid valve 97, 100 is opened. In addition, each electromagnetic
The valves 92 and 94 are controlled by the control unit so that
Opened and closed based on room temperature measurement by temperature sensors 41 and 42,
When either of them is closed, the indoor heat exchangers 11 and 12 are synchronized.
When they are stopped and opened at the same time, each indoor heat exchanger
Are operated synchronously, and the temperature of each compartment 1 and 2 is turned on and off
Controlled. The refrigerant evaporated through the indoor heat exchanger 11
Passes through the accumulator 9 and check valve 8 through the four-way valve 6
Returning to compressor 3, it is compressed here and becomes high-pressure gas refrigerant again.
You. Conversely, storage room 1 is in the heating mode and storage room 2
Figure 6 shows the case where the
Refer to the operation diagram when the other is for cooling and one is for heating.
It will be explained while referring to the figures. In the figure, the thick solid line indicates the refrigerant flow.
The symbol H for the storage room 1 is for heating, and the symbol for the storage room 2
Number C indicates cooling. Indoor heat exchanger in containment room 1
11 is a condenser, and indoor heat exchanger 12 in containment room 2 is
Each function as a generator, the outdoor heat exchanger 4 is stopped
You. The driving operation is as follows. Pressure by compressor 3
The compressed high-pressure gas refrigerant passes through the four-way valve 6 and belongs to the containment chamber 1.
Flows through the indoor heat exchanger 11 where the heat is released and the storage room 1
Is heated to become a high-pressure liquid refrigerant. This high pressure liquid refrigerant is split
The solenoid valve 91 of the unit 63 reaches the electronic expansion valve 110, where it expands.
Into a low-pressure two-phase refrigerant. This low-pressure two-phase refrigerant
Indoor heat exchange of the storage room 2 through the spiral tube 112 and solenoid valve 95
Flow through the heat exchanger 12 to absorb the heat in the room and evaporate.
Cooling. Each of the solenoid valves 92, 93, 94, 9 belonging to the shunt 63
6 is always closed by the control. Similarly to the control unit
Therefore, each solenoid valve 97,100,101,102 in the piping route is always closed.
Then, each solenoid valve 98,99 is opened. In addition, each of the shunts 63
The solenoid valves 91 and 95 are controlled by the control unit so that
2 Open / close based on room temperature measurement by temperature sensors 41 and 42
When one of them is closed, the indoor heat exchangers 11 and 12 are the same.
When each indoor heat exchanger 1
1,12 are operated synchronously and the temperature of each containment room 1,2 is on
・ Off controlled. In addition, evaporation through the indoor heat exchanger 12
Refrigerant passes through the four-way valve 6 to the accumulator 9 and check valve 8.
Return to the compressor 3 where it is compressed and
become. [0023] According to the vending machine of the first aspect, two vending machines are provided.
Each of the product storage rooms is based on a vapor compression refrigeration cycle.
To operate in heating mode or cooling mode.
The refrigerant between the indoor heat exchanger of each containment room and the outdoor heat exchanger
Various types used overall to switch the flow of
The number of valves etc. is reduced as follows, and the size is reduced accordingly
And cost reduction. For example, according to the embodiment
If you do n’t need a capillary tube,
On the other hand, two new valves are required, and the solenoid valve is
The electronic expansion valve, which has 12 units, but has a high unit price,
It can be reduced to 2 instead of 1 for the conventional 3
The number of check valves has been reduced from one to 14 in the past and increased to 13
It can be reduced sharply.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of an embodiment according to the present invention. FIG. 2 is a configuration diagram of a shunt in the embodiment. FIG. 3 is an operation diagram when all storage rooms are used for cooling in the embodiment. FIG. 4 is an operation diagram when all the storage rooms are used for heating in the embodiment. FIG. 5 is an operation diagram when one of the storage rooms is used for cooling and the other is used for heating in the embodiment. FIG. 7 is an operation diagram when one of the storage chambers is for heating and the other is for cooling. FIG. 7 is a configuration diagram of a conventional example. FIG. 8 is a configuration diagram of one switching unit in a conventional example. FIG. FIG. 10 is an operation diagram when heating and cooling storage rooms are mixed in the conventional example. FIG. 11 is an operation diagram when all storage rooms are used for heating in the conventional example. 12. Time chart of the temperature of each storage room when heating and cooling storage rooms are mixed in the conventional example [FIG. 13] Time chart of room temperature of each storage room when the storage room is for heating. [FIG. 14] Regarding the heating receiver, (a) is a side view, (b)
1, a storage room 3, a compressor 4, an outdoor heat exchanger 5, a blower 6, a four-way valve 7, an electronic expansion valve 8, a check valve 9, an accumulator 10, a can 11, a 12 and an indoor heat exchanger 21, 22 31, 32 Auxiliary heater 41, 42 Temperature sensor 50 Heating receiver 61, 62 Switching unit 63 Flow divider 69-80 Solenoid valve 91-102 Solenoid valve 110 Electronic expansion valve 111, 112 Capillary tube

Continuation of the front page (56) References JP-A-2-183769 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 5/02 510 F25D 11/00 101

Claims (1)

(57) [Claims 1] An outdoor heat exchanger that can function as an evaporator or a condenser, and installed in each of two commodity storage rooms,
In a vending machine in which a vapor compression refrigeration cycle is formed including an indoor heat exchanger that can function as an evaporator or a condenser, and the temperature of a corresponding storage room is controlled by operating and stopping each indoor heat exchanger. A first and a second, each having two solenoid valves connected in series.
And a third piping system in which another two solenoid valves and two capillary tubes are connected in series in the order of one solenoid valve, one capillary tube, the other capillary tube, and the other solenoid valve. Are connected in parallel with each other; the first and second midpoints as connection points of the solenoid valves in the first and second piping systems, and the capillary tubes in the third piping system. Of the third midpoints as connection points, the first midpoint and the third midpoint are connected via an electronic expansion valve, and the second midpoint and the third midpoint are connected. Each end of the first, second, and third piping systems connected in parallel and one end of each indoor heat exchanger are connected to each other to form a first midpoint and outdoor heat exchange. The other end of the heat exchanger is connected to the other end of each of the indoor heat exchangers through another electromagnetic valve. And another function which acts as an evaporator or a condenser, a fourth of a flow distributor which is opened and closed on the basis of the deviation with respect to room temperature value of each storage compartment, each two solenoid valves which are connected in series, the fifth
Are connected in parallel with each other, and the fourth and fifth pipe systems are connected in parallel.
The fourth and fourth connection points of each solenoid valve in each piping system
The midpoints of 5 correspond to the discharge pipe and the suction pipe of the compressor, respectively.
Parallel connection of the fourth and fifth piping systems
And one end of each indoor heat exchanger
And the fourth and fifth parts are connected to each other.
One of the midpoints is one end of the outdoor heat exchanger
Each solenoid valve is connected via another solenoid valve , and each indoor heat exchanger is used as an evaporator or condenser.
Function and the deviation of room temperature from the set value for each room.
A vending machine comprising a piping route that is opened and closed based on the difference .