JPS6242225B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a refrigerant amount adjusting device that changes the amount of refrigerant circulating in a refrigerant circuit in response to changes in load, and exhibits the highest refrigerating capacity according to the load. be.

Conventionally, a refrigeration system equipped with a refrigerant amount adjustment device connects a compressor a, a condenser b, a throttle device c, and an evaporator d in a ring, and throttles a refrigerant amount adjustment container e, as shown in Fig. 1. At connection position g in the middle of device c,
Alternatively, a configuration is known in which the throttle device c and the evaporator d are connected, and the suction pipe f is passed through the refrigerant amount adjustment container e.

In such a configuration, the refrigerant at the connection position g between the expansion device c and the refrigerant amount adjustment container e is in a gas-liquid two-phase saturated state. As a result, if the suction pipe f does not penetrate the refrigerant amount adjustment container e, the state of the refrigerant inside the refrigerant amount adjustment container e will be the same as that of the refrigerant at the connection position g between the expansion device c and the refrigerant amount adjustment container e. same saturation. However, when the suction pipe f passes through the refrigerant amount adjustment container e, the temperature of the suction pipe f is usually lower than the temperature at the connection position g between the throttle device c and the refrigerant amount adjustment container e, so that the refrigerant A portion of the refrigerant inside the volume control container e condenses. As a result, the wetness of the refrigerant inside the refrigerant amount adjusting container e becomes greater than the wetness of the refrigerant at the connection position g between the expansion device c and the refrigerant amount adjusting container e. That is, in this way, when the temperature of the suction pipe f is lower than the temperature of the connection position g, the refrigerant is simply accumulated in the refrigerant amount adjustment container e.

The change in the state of the refrigerant inside the refrigerant amount adjusting container e described above with respect to the load will be explained using FIG. 2.
First, when considering the heat balance of the refrigerant amount adjustment container e,
The main amount of heat is the amount of heat that enters the refrigerant amount adjustment container e due to heat transfer from the air surrounding the refrigerant amount adjustment container e, and the amount of heat that enters the refrigerant amount adjustment container e by the suction pipe f penetrating the refrigerant amount adjustment container e. There is an amount of heat taken away from the amount adjustment container e. Figure 2 shows the state of the heat balance of the refrigerant amount adjustment container e with respect to load fluctuations of the refrigeration equipment, with the horizontal axis representing the magnitude of the load on the refrigeration system and the vertical axis representing the amount of heat entering the refrigerant amount adjustment container e. This is what was shown.
However, the fact that the amount of heat entering is negative means that the amount of heat is taken away from the refrigerant amount adjustment container e.
In Figure 2, the curve q1 represents the change in the amount of heat entering from the surrounding air with respect to the load, and the curve q2
represents the change in the amount of heat entering from the suction pipe f with respect to the load. The total amount of heat that enters the refrigerant amount adjustment container e is the sum of the curves q1 and q2, and this total amount of heat that enters is represented by the curve q3. Here, the point x on the curve q3 means that there is no amount of heat entering the refrigerant amount adjustment container e.

By the way, the case where the refrigerant amount adjusting container e performs the function of adjusting the refrigerant amount is only when the load changes within a certain range around the load represented by the point x. This is because when the load is much larger than the load at point x, the refrigerant amount adjustment container e
The refrigerant inside the refrigerant is always in a superheated vapor state, and even if there is a load change, only the degree of superheating of the refrigerant inside the refrigerant amount adjustment container e changes, and the refrigerant accumulated inside the refrigerant amount adjustment container e There is almost no change in the mass of On the other hand, when the load becomes much smaller than the load at point Only the degree of cooling changes, and there is almost no change in the mass of the refrigerant accumulated inside the refrigerant amount adjustment container e. However, the typical load range in which the refrigeration system is used is the range shown by points m and n in FIG. In other words, the normal load range in which the refrigeration system is used is considerably lower than the load represented by point x.

As is clear from the above explanation, in the normal load range in which the refrigeration system is used, the interior of the conventional refrigerant amount adjustment container e is occupied by supercooled liquid, and the refrigerant amount is adjusted only in an extremely large load range. In the normal load range in which the refrigeration system is used, it hardly functions to adjust the amount of refrigerant, and especially at low loads, it has the disadvantage that liquid returns to the compressor.

Therefore, the present invention solves the above-mentioned conventional drawbacks,
The amount of refrigerant flowing through the refrigerant circuit is varied to accommodate large load ranges, normal load ranges in which refrigeration equipment is used, as well as low load ranges and load fluctuations across all load ranges. This makes it possible for the refrigeration equipment to demonstrate its maximum capacity accordingly.

Hereinafter, the present invention will be explained with reference to FIGS. 3 to 8 of the accompanying drawings showing one embodiment thereof.

As shown in FIG. 3, the refrigeration cycle is constructed by connecting a compressor 1, a condenser 2, a throttle device 3, and an evaporator 4 in a ring shape. The first refrigerant amount adjustment container 5 is connected to the first connection position 3a in the middle of the expansion device 3, and the second refrigerant amount adjustment container 6 is connected between the first connection position 3a and the condenser 2. The third refrigerant amount adjustment container 7 is connected to a third connection position 3c located between the first connection position 3a and the evaporator 4. ing. In addition, the suction pipe 9
connects the compressor 1 and evaporator 4, and connects the branch pipe 8a
One end is connected to a branch pipe 8b in the middle of a connecting pipe 8 that connects the condenser 2 and the throttle device 3.
The other end of a is located in the middle of the connecting pipe 8 and closer to the throttle device 3 than the branch pipe 8b.
connected to c. Furthermore, as shown in FIG. 4, the suction pipe 9 and the branch pipe 8a each penetrate the first refrigerant amount regulating container 5, and as shown in FIGS. 9 also passes through the second refrigerant amount adjustment container 6 and the third refrigerant amount adjustment container 7.

Next, the operation of the refrigerant amount adjusting device will be explained below.

Generally, the temperature of the suction pipe 9 changes sensitively and greatly with respect to load fluctuations, but the temperatures of the first connection position 3a, second connection position 3b, and third connection position 3c do not change much. . Moreover, the mass of the refrigerant accumulated in the first refrigerant amount adjustment container 5, the second refrigerant amount adjustment container 6, and the third refrigerant amount adjustment container 7 is determined by the temperature of the suction pipe 9 and the respective first connection position 3a. , and the temperature difference between the second connection position 3b and the third connection position 3c. Furthermore, the second connection position 3b is closer to the condenser 2 than the first connection position 3a. That is, since the saturation temperature of the second connection position 3b is always higher than the saturation temperature of the first connection position 3a, both the first refrigerant amount adjustment container 5 and the second refrigerant amount adjustment container 6 are connected to the same suction pipe 9. However, the humidity of the refrigerant inside the second refrigerant amount adjustment container 6 is always greater than the humidity of the refrigerant inside the first refrigerant amount adjustment container 5.

Further, the third connection position 3c is closer to the evaporator 4 than the first connection position 3a. That is, the saturation temperature of the third connection position 3c is the same as that of the first connection position 3c.
Since the temperature is always lower than the saturation temperature of a, both the first refrigerant amount adjustment container 5 and the third refrigerant amount adjustment container 7 exchange heat with the same suction pipe 9. The humidity of the refrigerant inside is always smaller than the humidity of the refrigerant inside the first refrigerant amount adjustment container 5.

Now, it is assumed that the refrigerant device is filled with the necessary refrigerant so that it can exhibit its maximum capacity under certain design heat load conditions. If the refrigeration system is operated under a certain load condition, the temperature of the suction pipe 9 is also maintained at a certain temperature. At this time, the temperature of the suction pipe 9 penetrating the first refrigerant amount adjustment container 5 is lower than the temperature of the first connection position 3a where the first refrigerant amount adjustment container 5 and the expansion device 3 are connected. , becomes high when the load is large, and becomes low when the load is normal or low. In addition, branch pipe 8
The temperature at point a is higher than the temperature at the first connection position 3a. Therefore, the temperature of the refrigerant inside the first refrigerant amount adjustment container 5 becomes higher than the temperature of the refrigerant at the first connection position 3a when the load is high, and becomes lower when the load is low. In addition, under a normal load, the saturation temperature is equal to the temperature of the refrigerant at the first connection position 3a, but the humidity of the refrigerant inside the first refrigerant amount adjustment container 5 and the refrigerant at the first connection position 3a are the same. The humidity will be different.

Further, the temperature of the suction pipe 9 penetrating the second refrigerant amount adjustment container 6 is lower than the temperature at the second connection position 3b under normal load or low load, but under high load. In this case, the suction pipe 9 will be at approximately the same temperature as the second connection location 3b. Therefore, the temperature of the refrigerant inside the second refrigerant amount adjustment container 6 is lower than the temperature of the refrigerant at the second connection position 3b under normal load or low load. Furthermore, under high load, the refrigerant inside the second refrigerant amount adjustment container 6 exhibits a saturation temperature equal to the temperature of the refrigerant at the second connection position 3b, but the refrigerant inside the second refrigerant amount adjustment container 6 The humidity of the refrigerant at the second connection position 3b is different from that of the refrigerant at the second connection position 3b.

Furthermore, the temperature of the suction pipe 9 penetrating the third refrigerant amount adjustment container 7 is higher than the temperature at the third connection position 3c under normal load or high load, but under low load. In this case, the suction pipe 9 has approximately the same temperature as the third connection position 3c. Therefore, the temperature of the refrigerant inside the third refrigerant amount adjustment container 7 becomes higher than the temperature of the refrigerant at the third connection position 3c under normal load or high load. In addition, under low load, the refrigerant inside the third refrigerant amount adjustment container 7 exhibits a saturation temperature equal to the temperature of the refrigerant at the third connection position 3c, but the refrigerant inside the third refrigerant amount adjustment container 7 The humidity of the refrigerant at the third connection position 3c is different from that of the refrigerant at the third connection position 3c.

Therefore, when adjusting the amount of refrigerant, it is important to adjust the wetness of the refrigerant inside the first refrigerant amount adjustment container 5, the second refrigerant amount adjustment container 6, and the third refrigerant amount adjustment container 7. In other words, since the difference in specific weight between the gas state and the liquid state of the refrigerant is large, the inside of the first refrigerant amount adjustment container 5, the second refrigerant amount adjustment container 6, and the third refrigerant amount adjustment container 7 It is important to control the liquid phase ratio of the refrigerant.

In FIG. 7, the diameter of the branch pipe 8a is plotted on the horizontal axis, and the wetness of the refrigerant inside the first refrigerant amount adjustment container 5 is plotted on the vertical axis, and the temperature of the refrigerant under a certain design heat load condition is shown in FIG. This figure shows the ratio of the liquid phase of the refrigerant inside one refrigerant amount adjustment container 5. For example, in Figure 7, h
Assuming that the branch pipe 8a having the pipe diameter shown by the dot is used, the wetness of the refrigerant inside the first refrigerant amount adjustment container 5 is i under the design heat load conditions. In this way, under certain design heat load conditions, the branch pipe 8
By appropriately selecting the pipe diameter of a, the wetness of the refrigerant inside the first refrigerant amount regulating container 5 can be appropriately selected.

Next, the operation of the refrigerant amount adjusting device in a normal load range in which the refrigeration system is used will be explained.

Assume that the refrigeration system is now being operated under a certain load (for example, design heat load conditions). The wetness of the refrigerant inside the first refrigerant amount adjustment container 5, in other words, the mass of the refrigerant contained inside the first refrigerant amount adjustment container 5, as shown in FIG. It can be arbitrarily selected by appropriately selecting the pipe diameter. Therefore, the refrigerant inside the first refrigerant amount adjustment container 5 is in a certain gas-liquid two-phase saturated state.

Also, in the case of normal load, as explained earlier,
Suction pipe 9 passing through the second refrigerant amount adjustment container 6
Since the temperature at the second connection position 3b is lower than the temperature at the second connection position 3b, the inside of the second refrigerant amount adjustment container 6 is occupied by the supercooled liquid. Furthermore, a third refrigerant amount adjustment container 7
Since the temperature of the suction pipe 9 passing through the third connection position 3c is higher than that of the third connection position 3c, the third refrigerant amount adjustment container 7
The interior of is occupied by superheated steam.

A case in which the load increases from the above load within the normal load range will be explained. When the load increases, the amount of refrigerant circulating in the refrigerant circuit becomes insufficient than the amount of refrigerant that allows the refrigeration system to exhibit its maximum capacity under this load condition. , will be sucked into the compressor 1. In other words, the first refrigerant amount adjustment container 5
The temperature of the suction pipe 9 passing through becomes higher than before the load change. Therefore, the refrigerant in the saturated liquid state inside the first refrigerant amount adjustment container 5 evaporates, so the wetness of the refrigerant inside the first refrigerant amount adjustment container 5 decreases, and the liquid phase ratio of the refrigerant decreases. becomes smaller. As a result, the mass of the refrigerant contained inside the first refrigerant amount adjustment container 5 decreases compared to before the load change. This decreased refrigerant is the refrigerant that has flowed into the refrigerant circuit from the first connection position 3a in the middle of the expansion device 3, so the refrigerant is insufficient. The refrigerant is replenished into the refrigerant circuit, which causes the suction pipe 9 to
temperature decreases and becomes equal to the temperature at the first connection point 3a in the middle of the throttle device 3.

Further, as before the load change, the inside of the second refrigerant amount adjustment container 6 is occupied by supercooled liquid, and the inside of the third refrigerant amount adjustment container 7 is occupied by superheated steam. Therefore, the mass of the refrigerant accumulated in the second refrigerant amount adjustment container 6 and the third refrigerant amount adjustment container 7 hardly changes.

Next, a case where the load is reduced within the normal load range from a certain load mentioned above (for example, the design thermal load condition) will be described. Under this load condition, an excess amount of refrigerant will be circulating in the refrigerant circuit than the amount of refrigerant that allows the refrigeration system to achieve its maximum capacity.
Refrigerant with almost no superheat is sucked into the compressor 1 through the suction pipe 9. In other words, the temperature of the suction pipe 9 passing through the first refrigerant amount adjustment container 5 becomes lower than before the load decreases. For this reason, the refrigerant in the saturated vapor state inside the first refrigerant amount adjustment container 5 condenses, so the wetness of the refrigerant inside the first refrigerant amount adjustment container 5 increases, and the liquid phase ratio of the refrigerant increases. growing.

As a result, the mass of the refrigerant contained inside the first refrigerant amount adjustment container 5 increases compared to before the load change. This increased refrigerant is the refrigerant in the refrigerant circuit that has flowed into the first refrigerant amount adjustment container 5, so the excess refrigerant in the refrigerant circuit has been removed, and the suction pipe 9 The temperature increases to balance the temperature at the first connection location 3a. Furthermore, since the interiors of the second refrigerant amount adjustment container 6 and the third refrigerant amount adjustment container 7 are occupied by supercooled liquid and superheated steam, respectively, as before the load change, the second refrigerant amount adjustment container 6
The mass of the refrigerant accumulated inside the third refrigerant amount adjustment container 7 hardly changes.

The operation of the refrigerant amount adjustment device when the load is lower than the normal load range (low load) will be explained.

In this way, when the load becomes low, the temperature of the refrigerant passing through the suction pipe 9 becomes even lower than in the case of normal load, so the inside of the first refrigerant amount adjustment container 5 is almost saturated liquid or supercooled liquid. It will be occupied by liquid. Therefore, the mass of the refrigerant contained in the first refrigerant amount adjustment container 5 increases compared to the case of normal load, and the increased amount of refrigerant is removed from the refrigerant circuit. However, the low load range in which the first refrigerant amount adjustment container 5 can adjust the amount of refrigerant is limited to a relatively narrow range. When the load becomes smaller than a certain load, the refrigerant inside the first refrigerant amount adjustment container 5 becomes a supercooled liquid state, and even if the load decreases below this load, the refrigerant inside the first refrigerant amount adjustment container 5 The mass of refrigerant accumulated is
Almost no change. On the other hand, when the temperature of the suction pipe 9 decreases in this way during low load, the temperature of the suction pipe 9 and the temperature of the third connecting device 3c become almost equal, so the third refrigerant amount adjustment container 7 The interior becomes saturated with two gas-liquid phases. That is, as the load decreases, the temperature and humidity of the refrigerant inside the third refrigerant amount adjustment container 7 increases, and the mass of the refrigerant contained therein increases. However, since the inside of the second refrigerant amount adjustment container 6 is occupied by the supercooled liquid as in the case of normal load, the mass of the refrigerant accumulated therein hardly changes.

Next, the operation of the refrigerant amount adjusting device when the load is higher than the normal load (high load) will be explained.

When the load increases in this way, the temperature of the refrigerant passing through the suction pipe 9 becomes higher than in the case of a normal load, so the inside of the first refrigerant amount adjustment container 5 is almost saturated steam or superheated steam. It will be occupied by Therefore, the mass of the refrigerant contained in the first refrigerant amount adjustment container 5 is reduced compared to the case of normal load, and the reduced amount of refrigerant is replenished into the refrigerant circuit. However, the high load range in which the first refrigerant amount adjustment container 5 can adjust the amount of refrigerant is limited to a relatively narrow portion. When the load becomes larger than a certain load, the refrigerant inside the first refrigerant amount adjustment container 5 becomes a superheated vapor state, and even if the load increases beyond this load, the refrigerant inside the first refrigerant amount adjustment container 5 The mass of stored refrigerant remains almost unchanged. On the other hand, when the temperature of the suction pipe 9 increases in this way under high load, the suction pipe 9
Since the temperature at the second connection position 3b is almost equal to the temperature at the second connection position 3b, the inside of the second refrigerant amount adjustment container 6 is as follows.
A state of gas-liquid two-phase saturation is reached. That is, as the load increases, the wetness of the refrigerant inside the second refrigerant amount adjustment container 6 decreases, and the mass of the refrigerant contained therein decreases. However, since the inside of the third refrigerant amount adjustment container 7 is occupied by superheated steam as in the case of normal load, the mass of the refrigerant accumulated therein is almost unchanged from that in the case of normal load.

In FIG. 8, the horizontal axis represents the magnitude of the load, and the vertical axis represents the accumulation inside each of the first refrigerant amount adjustment container 5, the second refrigerant amount adjustment container 6, and the third refrigerant amount adjustment container 7. The figure shows the change in the amount of refrigerant with respect to load fluctuations, based on the mass of refrigerant used. As is clear from FIG. 8, in the high load range, the second refrigerant amount adjustment container 6 mainly adjusts the refrigerant amount.
In the normal load range, the first refrigerant amount adjustment container 5 mainly adjusts the refrigerant amount, and in the low load range,
The third refrigerant amount adjustment container 7 mainly performs refrigerant amount adjustment.

Next, another embodiment of the refrigerant amount adjusting device according to the present invention will be described with reference to FIG.

In the figure, the difference between the previously explained FIG. 3 and FIG. 9 is that in FIG.
A branch pipe 8a branched from the connecting pipe 8 connecting the
It is characterized in that the connecting pipe 8 is passed through the first refrigerant amount adjusting container 5, and in FIG. 9, the connecting pipe 8 is passed through the first refrigerant amount adjusting container 5 without branching. It is.

The refrigerant amount adjusting device shown in FIG. 9 also provides the same effects as the previous embodiment. Here, the same parts as in FIG. 3 are given the same numbers, and the explanation will be omitted.

In the examples shown in FIGS. 3 to 6 and 9, a connecting pipe 8 connecting the condenser 2 and the throttle device 3, or a branch pipe 8a branched from the connecting pipe 8 and a suction pipe 9 is passed through the first refrigerant amount adjustment container 5, and further, the suction pipe 9 is passed through the second refrigerant amount adjustment container 6 and the third refrigerant amount adjustment container 7. This means that the connection pipe 8 or the branch pipe 8a and the suction pipe 9 are respectively allowed to exchange heat with the first refrigerant amount adjustment container 5, and that the suction pipe 9 is connected to the second refrigerant amount adjustment container 6.
and the third refrigerant amount adjustment container 7 to exchange heat. Therefore, the connecting pipe 8 or the branch pipe 8a
and the suction pipe 9 are brought into contact with the first refrigerant amount adjustment container 5. In addition, the suction pipe 9 is connected to the second refrigerant amount adjustment container 6.
The refrigerant amount adjusting container 7 may be placed in contact with the third refrigerant amount adjusting container 7 to exchange heat.

Furthermore, in the examples shown in FIGS. 3 and 9, the second connection position 3b and the third connection position 3c are set in the middle of the diaphragm device 3, but the second connection position 3b and the third connection position 3c are The connection position 3c may be set between the condenser 2 and the throttle device 3, and between the evaporator 4 and the throttle device 3, respectively.

Furthermore, in the examples shown in FIGS. 3 and 9, the third refrigerant amount adjustment container 7, the first refrigerant amount adjustment container 5,
Although the suction pipe 9 is passed through the second refrigerant amount adjustment container 6 in this order, this order may be any.

As is clear from the above embodiments, the refrigerant amount adjustment device in the refrigeration system of the present invention connects a compressor, a condenser, a throttle device, an evaporator, and a plurality of refrigerant amount adjustment containers to form a refrigerant circuit, A first refrigerant amount adjustment container is connected to a first connection position in the middle of the expansion device, and a second refrigerant amount adjustment container is connected to a second connection position located between the first connection position and the condenser. a third connection position located between the first connection position and the evaporator, and a connection connecting the condenser and the throttling device; A pipe or a branch pipe branched from the connecting pipe is arranged in the first refrigerant amount regulating container for heat exchange, and the suction pipe of the compressor is connected to the first refrigerant amount regulating container and the second refrigerant amount regulating container. The refrigerant amount adjustment container and the third refrigerant amount adjustment container are each arranged for heat exchange, making it possible to adjust the refrigerant amount over a wider range of load fluctuations than with conventional refrigerant amount adjustment devices. , unlike conventional refrigerant amount adjustment devices, a connecting pipe connecting a condenser and a throttling device, or a branch pipe formed by branching a part of the connecting pipe, is arranged in the first refrigerant amount adjusting container for heat exchange. Therefore, by appropriately selecting the pipe diameter of the connecting pipe or the pipe diameter of the branch pipe, the amount of refrigerant that can be accumulated in the first refrigerant amount adjustment container can be arbitrarily selected under the design heat load conditions. As a result, the size of the first refrigerant amount adjustment container can be easily determined so that the refrigerant amount adjustment function can be sufficiently performed for the highest and lowest load conditions considered at the time of design. The refrigerant amount adjustment device only performs the refrigerant amount adjustment function in a limited range of relatively high loads, but the refrigerant amount adjustment device according to the present invention performs the refrigerant amount adjustment function in addition to the refrigerant amount adjustment function in the normal load range. Since it is equipped with a second refrigerant amount adjustment container, it is possible to adjust the refrigerant amount even when the load is extremely high.Furthermore, since it is equipped with a third refrigerant amount adjustment container, it can be used even when the load is extremely high. The refrigerant amount adjustment function is also possible, and since the refrigerant amount is sufficiently adjusted even when the load is extremely low, it has various advantages such as being able to completely prevent liquid from returning to the compressor.

[Brief explanation of the drawing]

Fig. 1 is a diagram of a refrigeration cycle equipped with a conventional refrigerant amount adjustment device, Fig. 2 is an explanatory diagram showing the heat balance of the refrigerant amount adjustment container, and Fig. 3 is a refrigerant amount of a refrigeration system according to an embodiment of the present invention. A diagram of a refrigeration cycle equipped with an adjustment device, FIG. 4 is an enlarged partial cross-sectional view showing the first refrigerant amount adjustment container in the refrigerant amount adjustment device, and FIG. 5 is a partial sectional view showing the second refrigerant amount adjustment container. FIG. 6 is an enlarged partial cross-sectional view showing the third refrigerant amount adjustment container; FIG. 7 is an explanatory diagram showing the wetness of the refrigerant in the first refrigerant amount adjustment container; FIG. 8 is an explanatory diagram showing changes in the mass of the refrigerant in the first refrigerant amount adjustment container, the second refrigerant amount adjustment container, and the third refrigerant amount adjustment container,
FIG. 9 is a diagram of a refrigeration cycle equipped with a refrigerant amount adjusting device according to another embodiment of the present invention. 1... Compressor, 2... Condenser, 3... Squeezing device, 3a
...First connection position, 3b...Second connection position, 3c
…Third connection position, 4…Evaporator, 5…First refrigerant amount adjustment container, 6…Second refrigerant amount adjustment container, 7…Third refrigerant amount adjustment container, 8…Connection pipe, 8a…Branch Pipe, 9... Suction pipe.

Claims (1)

[Claims] 1. A compressor, a condenser, a throttle device, an evaporator, and a plurality of refrigerant amount adjustment containers are connected to form a refrigerant circuit, and a first refrigerant amount adjustment container is connected to a first connection position in the middle of the expansion device. , a second refrigerant amount adjustment container is connected to a second connection position located between the first connection position and the condenser, and a third refrigerant amount adjustment container is connected to the first connection position. A connection pipe connected to a third connection position located between the evaporator and the condenser and the expansion device is disposed in the first refrigerant amount adjustment container in a heat exchange manner, and further A refrigerant amount regulating device for a refrigeration system, wherein a suction pipe of a compressor is disposed for heat exchange with the first refrigerant amount regulating container, the second refrigerant amount regulating container, and the third refrigerant amount regulating container.