CN216481351U - Refrigerating system - Google Patents

Abstract

The utility model discloses a refrigeration system, comprising: the system comprises a compressor, an air-cooled heat exchanger, an evaporative condenser, a liquid taking device, a refrigerant liquid pump, a throttling device and a load side heat exchanger, wherein an outlet of the compressor is connected with an inlet of the air-cooled heat exchanger; the first bypass pipeline is used for connecting the load side heat exchanger and an inlet of the air-cooled heat exchanger, the first bypass pipeline is provided with a first switch valve, and a second switch valve is arranged between the compressor and the air-cooled heat exchanger; and the second bypass pipeline is used for connecting the outlet of the liquid taking device with the throttling device and is provided with a third on-off valve for controlling the on-off of the second bypass pipeline. The refrigerating system can effectively utilize the natural cold source in winter, and saves energy consumption.

Description

Refrigerating system

Technical Field

The utility model relates to the technical field of refrigeration equipment, in particular to a refrigeration system.

Background

In data centers and other environments which need refrigeration throughout the year and have stable refrigerating capacity requirements, the refrigeration is usually performed by adopting an air-cooled heat exchanger mechanical refrigeration technology or an evaporative cooling heat exchanger mechanical refrigeration technology.

However, no matter the air-cooled heat exchanger mechanical refrigeration technology or the evaporative cooling heat exchanger mechanical refrigeration technology is adopted for refrigeration, at present, a compressor still needs to be started for mechanical refrigeration in winter, natural cold sources in winter cannot be effectively utilized, and energy waste is caused.

Therefore, how to effectively utilize the natural cold source in winter during refrigeration in winter is a problem to be urgently solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a refrigeration system, which can effectively utilize the natural cold source in winter.

In order to achieve the above purpose, the utility model provides the following technical scheme:

a refrigeration system comprising:

the system comprises a compressor, an air-cooled heat exchanger, an evaporative condenser, a liquid taking device, a refrigerant liquid pump, a throttling device and a load side heat exchanger, wherein an outlet of the compressor is connected with an inlet of the air-cooled heat exchanger, an outlet of the air-cooled heat exchanger is connected with an inlet of the evaporative condenser, an outlet of the evaporative condenser is connected with the liquid taking device, an outlet of the liquid taking device is connected with an inlet of the refrigerant liquid pump, an outlet of the refrigerant liquid pump, the throttling device and the load side heat exchanger are sequentially connected, and the load side heat exchanger is connected with an inlet of the compressor;

the first bypass pipeline is used for connecting the load side heat exchanger and the inlet of the air-cooled heat exchanger, a first switch valve is arranged on the first bypass pipeline, and a second switch valve is arranged between the outlet of the compressor and the inlet of the air-cooled heat exchanger;

and the second bypass pipeline is used for connecting the outlet of the liquid taking device with the throttling device and is provided with a third switch valve for controlling the on-off of the second bypass pipeline.

Preferably, the number of the air-cooled heat exchangers is two, and the two air-cooled heat exchangers are arranged in parallel.

Preferably, the evaporative condenser and the two air-cooled heat exchangers are arranged side by side, and the two air-cooled heat exchangers are respectively arranged at two sides of the evaporative condenser.

Preferably, the top of the air-cooled heat exchanger and the top of the evaporative condenser are provided with a common air outlet, and the air outlet is provided with at least one fan.

Preferably, the evaporative condenser and the air inlets of the two air-cooled heat exchangers are located on the side.

Preferably, a partition is provided between the air-cooled heat exchanger and the evaporative condenser.

Preferably, the refrigerant flow paths of the evaporative condenser are arranged in rows from top to bottom, and the outlet headers of the air-cooled heat exchanger are connected with the tops of the refrigerant flow paths.

Preferably, the spraying system is provided with an independent water distribution device, and the water distribution device comprises a circulating water tank, a circulating water pump, a water filter and a water distribution pipeline.

Preferably, the refrigeration system includes a first mode of operation, a second mode of operation, and a third mode of operation;

in the first working mode, the compressor, the second switch valve, the spraying system of the evaporative condenser, the fan of the air-cooled heat exchanger, the fan of the evaporative condenser and the third switch valve are all opened, and the refrigerant liquid pump and the first switch valve are all closed;

in the second working mode, the compressor, the second switch valve, the spraying system and the third switch valve are all closed, and the fan of the air-cooled heat exchanger, the fan of the evaporative condenser, the refrigerant liquid pump and the first switch valve are all opened;

in the third working mode, the compressor, the second switch valve and the third switch valve are all closed, and the spraying system, the fan of the air-cooled heat exchanger, the fan of the evaporative condenser, the refrigerant liquid pump and the first switch valve are all opened.

Preferably, the ambient temperature when the first operation mode is operated is greater than or equal to 15 ℃ and less than or equal to 55 ℃;

the ambient temperature when the second working mode operates is less than or equal to 1 ℃;

and the environment temperature when the third working mode operates is more than or equal to 1 ℃ and less than or equal to 15 ℃.

The refrigeration system provided by the utility model comprises the compressor and the refrigerant liquid pump, so that the compressor can be started when the demand of refrigerating capacity is large in summer and the like, the compressor is utilized to provide circulating power for the refrigerant, and the conventional mechanical refrigeration is realized; in winter, the temperature of the external environment is low, the required refrigerating capacity is small, at the moment, the compressor can be closed, the refrigerant liquid pump is opened, and the refrigerant liquid pump is used for providing circulating power for the refrigerant.

It can be understood that the switching operation of the compressor and the refrigerant liquid pump can be effectively realized without influencing the circulation of the refrigerant by arranging the first bypass pipeline and the first switch valve and arranging the second bypass pipeline and the third switch valve.

In addition, the refrigeration system adopts an air-cooled heat exchanger and an evaporative condenser which are arranged in series to form a mixed heat exchanger; because the evaporative condenser can effectively utilize latent heat of sprayed water evaporation to cool the refrigerant, compared with the prior art, the heat exchange efficiency of the mixed heat exchanger formed by connecting the air-cooled heat exchanger and the evaporative condenser in series is higher than that of the air-cooled heat exchanger with the same volume, so that the air-cooled heat exchanger and the evaporative condenser are organically coupled, the condensation heat exchange efficiency in a refrigeration cycle is improved, the energy efficiency of the whole machine is improved, and the energy consumption is reduced. And the high-temperature refrigerant firstly enters the air-cooled heat exchanger for cooling and then enters the evaporative condenser, so that the temperature of the refrigerant entering the inlet of the evaporative condenser is reduced, the temperature difference between the temperature of the refrigerant entering the evaporative condenser and the outdoor wet bulb temperature is reduced, mineral ions in water are not easy to separate out under the temperature difference, a temperature interval in which mineral substances in water are easy to crystallize is avoided, the risk of scaling during the operation of the evaporative condenser is reduced, the stability of a unit is improved, and the refrigeration efficiency in summer is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a refrigeration system according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a refrigeration system according to a second embodiment of the present invention;

FIG. 3 is a schematic diagram of the refrigeration system of FIG. 2 in a first mode of operation;

FIG. 4 is a schematic diagram of the refrigeration system of FIG. 2 in a second mode of operation;

fig. 5 is a schematic diagram of the layout of the air-cooled heat exchanger and the evaporative condenser of the refrigeration system and the water distribution device of the evaporative condenser according to the embodiment of the present invention;

FIG. 6 is a schematic view of the layout of the air-cooled heat exchanger and evaporative condenser;

FIG. 7 is a schematic diagram of the air flow of an air-cooled heat exchanger and evaporative condenser;

FIG. 8 is a schematic layout of the fan of the air-cooled heat exchanger and evaporative condenser shown in one embodiment;

fig. 9 is a schematic layout of fans of an air-cooled heat exchanger and an evaporative condenser according to another embodiment.

The reference numerals in fig. 1 to 9 are as follows:

1 is a compressor, 2 is an air-cooled heat exchanger, 3 is an evaporative condenser, 4 is a liquid taking device, 5 is a refrigerant liquid pump, 6 is a throttling device, 7 is a load side heat exchanger, 8 is a gas-liquid separator, 9 is a first bypass pipeline, 10 is a first switch valve, 11 is a second switch valve, 12 is a second bypass pipeline, 13 is a third switch valve, 14 is a fan, 15 is an air outlet, 16 is a partition plate, 17 is a refrigerant flow path, 18 is a circulating water tank, and 19 is a circulating water pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the utility model is to provide a refrigeration system which can effectively utilize the natural cold source in winter.

Referring to fig. 1-9, fig. 1 is a schematic diagram of a refrigeration system according to an embodiment; FIG. 2 is a schematic diagram of the construction of a refrigeration system in another embodiment; FIG. 3 is a schematic diagram of the refrigeration system of FIG. 2 in a first mode of operation; FIG. 4 is a schematic diagram of the refrigeration system of FIG. 2 in a second mode of operation; FIG. 5 is a schematic view of the layout of the air-cooled heat exchanger and the evaporative condenser and the water distribution device of the evaporative condenser; FIG. 6 is a schematic view of the layout of the air-cooled heat exchanger and evaporative condenser; FIG. 7 is a schematic air flow diagram of an air-cooled heat exchanger and evaporative condenser; FIG. 8 is a schematic layout of the fan of the air-cooled heat exchanger and evaporative condenser shown in one embodiment; fig. 9 is a schematic layout of fans of an air-cooled heat exchanger and an evaporative condenser according to another embodiment.

Wherein the direction of the arrows in fig. 1-9 refers to the direction of flow of the refrigerant or the direction of air flow.

The utility model provides a refrigerating system which comprises a compressor 1, an air-cooled heat exchanger 2, an evaporative condenser 3, a liquid taking device 4, a refrigerant liquid pump 5, a throttling device 6, a load side heat exchanger 7, a first bypass pipeline 9, a first switch valve 10, a second switch valve 11, a second bypass pipeline 12 and a third switch valve 13.

Specifically, an outlet of the compressor 1 is connected with an inlet of the air-cooled heat exchanger 2, an outlet of the air-cooled heat exchanger 2 is connected with an inlet of the evaporative condenser 3, an outlet of the evaporative condenser 3 is connected with a liquid taking device 4, an outlet of the liquid taking device 4 is connected with an inlet of a refrigerant liquid pump 5, an outlet of the refrigerant liquid pump 5, a throttling device 6 and a load side heat exchanger 7 are sequentially connected, and the load side heat exchanger 7 is connected with the inlet of the compressor 1.

That is, the compressor 1, the air-cooled heat exchanger 2, the evaporative condenser 3, the liquid intake device 4, the refrigerant liquid pump 5, the throttle device 6, and the load-side heat exchanger 7 are connected in sequence, and the load-side heat exchanger 7 is connected to an inlet of the compressor 1 to form a circulation loop.

In addition, the first bypass line 9 serves to connect the load side heat exchanger 7 and the inlet of the air-cooled heat exchanger 2, that is, the first bypass line 9 allows the load side heat exchanger 7 to directly communicate with the air-cooled heat exchanger 2 without passing through the compressor 1.

The first bypass line 9 is provided with a first on-off valve 10, and a second on-off valve 11 is provided between the outlet of the compressor 1 and the inlet of the air-cooled heat exchanger 2.

In the present invention, the first on-off valve 10 is used to control the on-off of the first bypass line 9, and the second on-off valve 11 is used to control the on-off of the line between the compressor 1 and the air-cooled heat exchanger 2.

It is to be understood that, in actual use, the refrigerant flows only from the compressor 1 to the air-cooling type heat exchanger 2, or the refrigerant flows only from the load side heat exchanger 7 to the air-cooling type heat exchanger 2, and there is no reverse flow. That is, the first bypass line 9 and the line from the compressor 1 to the air-cooled heat exchanger 2 are both one-way communication lines. Therefore, the first and second switching valves 10 and 11 are each preferably a check valve having a function of one-way conduction, and the first and second switching valves 10 and 11 have the same one-way conduction direction, the one-way conduction direction of the check valve as the first switching valve 10 is conduction from the load-side heat exchanger 7 to the air-cooling type heat exchanger 2, and the one-way conduction direction of the check valve as the second switching valve 11 is conduction from the compressor 1 to the air-cooling type heat exchanger 2.

Of course, the first switching valve 10 and the second switching valve 11 may be solenoid valves, and the opening and closing of the first switching valve 10 and the second switching valve 11 are controlled by control logic, respectively. When the pipeline from the compressor 1 to the air-cooled heat exchanger 2 needs to be conducted, the first switch valve 10 is opened, and the second switch valve 11 is closed; when the first bypass line 9 needs to be conducted, the first on-off valve 10 is closed and the second on-off valve 11 is opened.

The second bypass line 12 is used to connect the outlet of the liquid extractor 4 with the throttling device 6, that is, the second bypass line 12 enables the liquid extractor 4 to be directly communicated with the throttling device 6 without passing through the refrigerant pump 5.

The third switch valve 13 is disposed on the second bypass line 12 and is used for controlling on/off of the second bypass line 12. Preferably, the third switching valve 13 is a solenoid valve.

Because the refrigerating system provided by the utility model comprises the compressor 1 and the refrigerant liquid pump 5, when the refrigerating capacity demand is large in summer and the like, the compressor 1 can be started, the refrigerant liquid pump 5 is closed, the compressor 1 is utilized to provide circulating power for the refrigerant, and the conventional mechanical refrigeration is realized; at this time, the first switching valve 10 is opened and the second switching valve 11 is closed, that is, the first bypass line 9 is in the open state; and the third switching valve 13 is opened to conduct the second bypass line 12.

In winter, the temperature of the external environment is low, the required refrigerating capacity is small, at the moment, the compressor 1 can be closed, the refrigerant liquid pump 5 is opened, so that the refrigerant liquid pump 5 is utilized to provide circulating power for the refrigerant, at the moment, the refrigerating system mainly releases heat to the outside through the air-cooled heat exchanger 2 and/or the evaporative condenser 3, natural cooling is realized by utilizing a natural cold source, and the power of the refrigerant liquid pump 5 is far less than that of the compressor, so that the energy consumption can be reduced.

It can be understood that the switching operation of the compressor 1 and the refrigerant liquid pump 5 can be effectively realized without affecting the circulation of the refrigerant by providing the first bypass line 9 and the first on-off valve 10 and providing the second bypass line 12 and the third on-off valve 13.

In addition, the refrigeration system adopts an air-cooled heat exchanger 2 and an evaporative condenser 3 which are arranged in series to form a mixed heat exchanger; because the evaporative condenser 3 can effectively utilize latent heat of sprayed water evaporation to cool the refrigerant, compared with the prior art, the heat exchange efficiency of the mixed heat exchanger formed by connecting the air-cooled heat exchanger 2 and the evaporative condenser 3 in series is higher than that of the air-cooled heat exchanger 2 with the same volume, so the air-cooled heat exchanger 2 and the evaporative condenser 3 are organically coupled, the condensation heat exchange efficiency in the refrigeration cycle is improved, the energy efficiency of the whole machine is improved, and the energy consumption is reduced. Moreover, the high-temperature refrigerant firstly enters the air-cooled heat exchanger 2 for cooling and then enters the evaporative condenser 3, so that the temperature of the refrigerant entering the inlet of the evaporative condenser 3 is reduced, the temperature difference between the temperature of the refrigerant entering the evaporative condenser 3 and the outdoor wet bulb temperature is reduced, mineral ions in water are not easy to separate out under the temperature difference, a temperature interval in which mineral substances in water are easy to crystallize is avoided, the risk of scaling during the operation of the evaporative condenser 3 is reduced, the stability of a unit is improved, and the refrigerating efficiency in summer is further improved. In addition, the second bypass pipeline 12 and the third switch valve 13 are arranged, so that the resistance of the refrigerant liquid pump 5 during the refrigeration operation of the compressor 1 is effectively avoided, the system efficiency is further improved, and the energy consumption is reduced.

For more reasonable refrigeration, on the basis of the above embodiment, the refrigeration system includes a first operation mode, a second operation mode and a third operation mode.

Specifically, in the first operation mode, the compressor 1, the second on-off valve 11, the spraying system of the evaporative condenser 3, the fan 14 of the air-cooled heat exchanger 2, the fan 14 of the evaporative condenser 3, and the third on-off valve 13 are all opened, and the refrigerant liquid pump 5 and the first on-off valve 10 are all closed.

In the second working mode, the compressor 1, the second switch valve 11, the spraying system and the third switch valve 13 are all closed, and the fan 14 of the air-cooled heat exchanger 2, the fan 14 of the evaporative condenser 3, the refrigerant liquid pump 5 and the first switch valve 10 are all opened.

In the third working mode, the compressor 1, the second switch valve 11 and the third switch valve 13 are all closed, and the spraying system, the fan 14 of the air-cooled heat exchanger 2, the fan 14 of the evaporative condenser 3, the refrigerant liquid pump 5 and the first switch valve 10 are all opened.

It can be seen that, when the refrigeration system operates in summer, the compressor 1 needs to operate to provide sufficient and stable refrigeration capacity, so that the refrigeration system is in the first operating mode at this time, that is, the compressor 1, the air-cooled heat exchanger 2 and the evaporative condenser 3 operate normally, the spraying system of the evaporative condenser 3 sprays normally, and the refrigerant liquid pump 5 does not operate. The refrigerant is compressed by the compressor 1 to form high-temperature high-pressure refrigerant steam, the high-temperature high-pressure refrigerant steam is discharged from an outlet of the compressor 1 and then enters the air-cooled heat exchanger 2, and the air-cooled heat exchanger 2 carries out non-mass transfer heat with outside air, so that the refrigerant in the air-cooled heat exchanger 2 is cooled; the cooled refrigerant enters the evaporative condenser 3, and under the action of a spraying system and a fan 14 of the evaporative condenser 3, spray water and strong convection air act together to efficiently cool the refrigerant in the evaporative condenser 3 in a latent heat manner; the refrigerant liquid cooled by the evaporative condenser 3 enters a liquid taking device 4 and flows through a throttling device 6 for throttling through a second bypass pipeline 12, the throttled refrigerant exchanges heat with a load in a load side heat exchanger 7 to provide stable cold energy for the load, and the refrigerant after heat exchange returns to an inlet of the compressor 1 through the load side heat exchanger 7 to enter the next cycle.

In the process, the air-cooled heat exchanger 2 and the evaporative condenser 3 are connected in series to form a mixed heat exchanger for heat exchange, so that the heat exchange efficiency is high, and the refrigeration efficiency in summer is improved.

In winter, the external environment temperature is low and is used as a natural cold source enough to provide stable cold for the load, so that the compressor 1 is not required to perform mechanical refrigeration; in addition, because the ambient temperature is low, water in the natural environment has a risk of freezing, at this time, the spraying system of the evaporative condenser 3 needs to be closed, that is, the refrigeration system is in the second working mode, the compressor 1 and the spraying system of the evaporative condenser 3 do not work, the second switch valve 11 and the third switch valve 13 are both closed, the fan 14 of the air-cooled heat exchanger 2, the fan 14 of the evaporative condenser 3 and the refrigerant liquid pump 5 work normally, the first switch valve 10 is opened, so that the refrigerant liquid pump 5 provides power for refrigerant circulation, and refrigeration is performed by the principle of a power heat pipe, thereby realizing natural cooling.

It can be seen that when the refrigeration system operates in winter, natural cooling is realized mainly by releasing heat to the outdoor through the air-cooled heat exchanger 2, and the spraying system of the evaporative condenser 3 stops spraying water, so that the risk of icing is avoided, and the problem that the operation of the evaporative condenser 3 is unstable due to low outdoor temperature is solved; moreover, the refrigerating system utilizes the refrigerant liquid pump 5 to provide circulating power for the refrigerant, and the power of the refrigerant liquid pump 5 is far less than that of the compressor 1, so that the energy consumption is further reduced.

In addition, it can be understood that the presence of the first on-off valve 10 avoids the refrigerant gas discharged from the outlet of the compressor 1 from passing through the first bypass line 9 to the inlet of the compressor 1 when cooling is performed by the compressor 1. The existence of the second switch valve 11 avoids the refrigerant from flowing back to the outlet of the compressor 1 when the compressor 1 does not work; that is, by providing the first and second switching valves 10 and 11, smooth switching of the first and second operation modes is ensured.

It should be noted that, in winter, when the refrigeration system is in the second operating mode, the circulating water pump 19 needs to be turned off, and the circulating water in the circulating water tank 18 needs to be drained, so as to prevent the water distribution device of the evaporative condenser 3 from freezing.

In addition, in consideration of the transition season between summer and winter, in order to save refrigeration energy consumption, the refrigeration system enters a third working mode, that is, the compressor 1 does not work, the second bypass pipeline 12 is disconnected, and the fan 14 of the air-cooled heat exchanger 2, the fan 14 of the evaporative condenser 3 and the refrigerant liquid pump 5 all work to provide power for refrigerant circulation by using the refrigerant liquid pump 5; furthermore, since the ambient temperature is not too low at this time, there is no risk of freezing the spray system, and the spray system of the evaporative condenser 3 is operating normally at this time. The refrigerant liquid pump 5 obtains refrigerant liquid from an outlet of the liquid taking device 4, the refrigerant liquid is pressurized by the refrigerant liquid pump 5, flows through the throttling device 6 for throttling, then enters the load side heat exchanger 7 to exchange heat with a load, and then sequentially passes through the first bypass pipeline 9, the air-cooled heat exchanger 2 and the evaporative condenser 3, and finally returns to the liquid taking device 4.

Therefore, in the process, the refrigerant pump 5 is used for providing circulating power for the refrigerant, and the power of the refrigerant pump 5 is far less than that of the compressor 1, so that the energy consumption is further reduced; moreover, through the combined work of the air-cooled heat exchanger 2 and the evaporative condenser 3, the evaporative condenser 3 effectively utilizes the latent heat of water evaporation to exchange heat, the heat exchange efficiency is improved, compared with the natural cooling which only adopts air cooling in a transition season, the refrigerating system can realize the switching of a natural cooling mode earlier, the time length of the natural cooling which can be utilized all the year round is prolonged, and the energy consumption of the refrigerating system all the year round is greatly reduced.

It should be noted that, in the above embodiments, the environmental temperature threshold corresponding to each of the first operation mode, the second operation mode, and the third operation mode is not specifically limited, and a person skilled in the art may set the environmental temperature threshold according to actual needs.

As a preferable scheme, on the basis of the above embodiment, the ambient temperature when the first operation mode operates is greater than or equal to 15 ℃ and less than or equal to 55 ℃; the ambient temperature when the second working mode operates is less than or equal to 1 ℃; the ambient temperature when the third operating mode is operated is greater than or equal to 1 ℃ and less than or equal to 15 ℃.

That is, the inventor of the present application has found that, under the above-mentioned ambient temperature threshold, the first operating mode, the second operating mode, or the third operating mode is operated correspondingly, so that the cooling effect is better, and the energy consumption can be reduced maximally.

On the basis of the above embodiment, it is preferable that a gas-liquid separator 8 is further included, and the gas-liquid separator 8 is disposed between the inlet of the compressor 1 and the load-side heat exchanger 7, that is, after passing through the load-side heat exchanger 7, the refrigerant enters the gas-liquid separator 8, and enters the inlet of the compressor 1 through the gas-liquid separator 8.

In order to improve the cooling effect of the air-cooled heat exchangers 2, on the basis of the above embodiment, the number of the air-cooled heat exchangers 2 is two, and the two air-cooled heat exchangers 2 are arranged in parallel.

That is, in this embodiment, the high-temperature and high-pressure refrigerant vapor discharged from the outlet of the compressor 1 is divided into two portions, enters the two air-cooled heat exchangers 2, is cooled by the two air-cooled heat exchangers 2, and then finally converges to the outlet header of each air-cooled heat exchanger 2, and enters the refrigerant flow path 17 of the evaporative condenser 3 through the outlet headers of the two air-cooled heat exchangers 2.

In order to save space and to take the convenience of connection of the refrigerant flow path 17 into consideration, on the basis of the above embodiment, the evaporative condenser 3 and the two air-cooled heat exchangers 2 are arranged side by side, and the two air-cooled heat exchangers 2 are respectively disposed at both sides of the evaporative condenser 3.

That is, the two air-cooled heat exchangers 2 are symmetrically distributed on both sides of the evaporative condenser 3, so that the outlet header of each air-cooled heat exchanger 2 is connected with the refrigerant flow path 17 of the evaporative condenser 3; the evaporative condenser 3 and the two air-cooled heat exchangers 2 are arranged side by side, so that the space is reasonably utilized, and the whole volume of the refrigerating system is reduced.

In order to further save space, on the basis of the above-described embodiment, as shown in fig. 6, the air-cooled heat exchanger 2 and the evaporative condenser 3 are provided with a common air outlet 15 at the top thereof, and the air outlet 15 is provided with at least one fan 14.

That is, in this embodiment, the air outlet 15 of the air-cooled heat exchanger 2 and the air outlet 15 of the evaporative condenser 3 are communicated with each other, that is, they share the same large air outlet 15, and the strong convection air of the air-cooled heat exchanger 2 and the evaporative condenser 3 is realized by the fan 14 disposed at the shared air outlet 15.

It should be noted that, in the present embodiment, the specific number of the fans 14 is not limited. For example, as shown in fig. 7, the number of the fans 14 is preferably two; as shown in fig. 8, the number of the fans 14 is three.

In addition, the present embodiment does not limit the specific structure of the fan 14, for example, the fan 14 may be an axial flow fan 14 or a centrifugal fan 14.

In view of the convenience of air intake, on the basis of the above-described embodiment, as shown in fig. 6, the evaporative condenser 3 and the air intakes of the two air-cooled heat exchangers 2 are located on the side.

Further, in order to ensure that the air-cooled heat exchanger 2 and the evaporative condenser 3 have independent air paths respectively and avoid mutual interference of air flows through the air-cooled heat exchanger 2 and the evaporative condenser 3, on the basis of the above embodiment, as shown in fig. 5, a partition plate 16 is provided between the air-cooled heat exchanger 2 and the evaporative condenser 3.

That is, in the present embodiment, the air-cooled heat exchanger 2 and the evaporative condenser 3 are separated by the partition plate 16, so that the air ducts of the air-cooled heat exchanger 2 and the evaporative condenser 3 are independent of each other, and the heat exchange between the air-cooled heat exchanger 2 and the evaporative condenser 3 is prevented from being influenced by each other.

More importantly, in order to reduce the resistance of the refrigerant fluid and avoid the bottom liquid accumulation, on the basis of the above embodiment, the refrigerant flow paths 17 of the evaporative condenser 3 are arranged in rows from top to bottom, and the outlet headers of the air-cooled heat exchanger 2 are connected with the tops of the refrigerant flow paths 17.

As shown in fig. 4, the refrigerant flow path 17 of the evaporative condenser 3 is bent from top to bottom to form a continuous refrigerant flow path 17, so that the refrigerant gradually flows from top to bottom in the refrigerant flow path 17 without overcoming the gravity effect, thereby reducing the resistance of the refrigerant fluid; furthermore, the arrangement is such that the outlet of the refrigerant flow path 17 of the evaporative condenser 3 is located at the bottom of the evaporative condenser 3, thereby avoiding liquid accumulation at the bottom of the evaporative condenser 3.

In addition, in view of the convenience of supplying water to the shower system of the evaporative condenser 3, on the basis of the above-described embodiment, the shower system is provided with a separate water distribution device including the circulation water tank 18, the circulation water pump 19, the water filter, and the water distribution pipeline.

It can be understood that when the spraying system needs to work, the circulating water pump 19 is started; when the spraying system does not need to work, the circulating water pump 19 is closed.

It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The refrigeration system provided by the present invention has been described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. A refrigeration system, comprising:

the air-cooled condenser-type heat exchanger comprises a compressor (1), an air-cooled heat exchanger (2), an evaporative condenser (3), a liquid taking device (4), a refrigerant liquid pump (5), a throttling device (6) and a load side heat exchanger (7), wherein an outlet of the compressor (1) is connected with an inlet of the air-cooled heat exchanger (2), an outlet of the air-cooled heat exchanger (2) is connected with an inlet of the evaporative condenser (3), an outlet of the evaporative condenser (3) is connected with the liquid taking device (4), an outlet of the liquid taking device (4) is connected with an inlet of the refrigerant liquid pump (5), an outlet of the refrigerant liquid pump (5), the throttling device (6) and the load side heat exchanger (7) are sequentially connected, and the load side heat exchanger (7) is connected with an inlet of the compressor (1);

a first bypass pipeline (9) used for connecting the load side heat exchanger (7) and the inlet of the air-cooled heat exchanger (2), wherein a first switch valve (10) is arranged on the first bypass pipeline (9), and a second switch valve (11) is arranged between the outlet of the compressor (1) and the inlet of the air-cooled heat exchanger (2);

and the second bypass pipeline (12) is used for connecting the outlet of the liquid taking device (4) with the throttling device (6), and the second bypass pipeline (12) is provided with a third on-off valve (13) for controlling the on-off of the second bypass pipeline.

2. A refrigerating system as claimed in claim 1, characterized in that the number of said air-cooled heat exchangers (2) is two, two of said air-cooled heat exchangers (2) being arranged in parallel.

3. A refrigerating system according to claim 2, wherein the evaporative condenser (3) and the two air-cooled heat exchangers (2) are arranged side by side, and the two air-cooled heat exchangers (2) are respectively provided on both sides of the evaporative condenser (3).

4. A refrigeration system according to claim 3, characterized in that the air-cooled heat exchanger (2) and the evaporative condenser (3) are provided at their top with a common air outlet (15), said air outlet (15) being provided with at least one fan (14).

5. A refrigeration system according to claim 3, wherein the evaporative condenser (3) and the air intakes of both of the air-cooled heat exchangers (2) are located at the side.

6. A refrigeration system according to claim 3, wherein a partition (16) is provided between said air-cooled heat exchanger (2) and said evaporative condenser (3).

7. A refrigeration system according to any one of claims 1 to 6, wherein the refrigerant flow paths (17) of the evaporative condenser (3) are arranged in rows from top to bottom, and the outlet headers of the air-cooled heat exchanger (2) are connected to the tops of the refrigerant flow paths (17).

8. A refrigeration system as claimed in any one of claims 1 to 6, characterized in that the spray system of the evaporative condenser (3) is provided with a separate water distribution device comprising a circulation water tank (18), a circulation water pump (19), a water filter and a water distribution line.

9. The refrigerant system as set forth in any one of claims 1 through 6, wherein said refrigerant system includes a first mode of operation, a second mode of operation and a third mode of operation;

in the first working mode, the compressor (1), the second switch valve (11), the spraying system of the evaporative condenser (3), the fan (14) of the air-cooled heat exchanger (2), the fan (14) of the evaporative condenser (3) and the third switch valve (13) are all opened, and the refrigerant liquid pump (5) and the first switch valve (10) are all closed;

in the second working mode, the compressor (1), the second switch valve (11), the spraying system and the third switch valve (13) are all closed, and a fan (14) of the air-cooled heat exchanger (2), a fan (14) of the evaporative condenser (3), the refrigerant liquid pump (5) and the first switch valve (10) are all opened;

in the third working mode, the compressor (1), the second switch valve (11) and the third switch valve (13) are all closed, and the spraying system, the fan (14) of the air-cooled heat exchanger (2), the fan (14) of the evaporative condenser (3), the refrigerant liquid pump (5) and the first switch valve (10) are all opened.

10. The refrigerant system as set forth in claim 9, wherein the ambient temperature at which said first mode of operation operates is greater than or equal to 15 ℃ and less than or equal to 55 ℃;

the ambient temperature when the second working mode operates is less than or equal to 1 ℃;

and the environment temperature when the third working mode operates is more than or equal to 1 ℃ and less than or equal to 15 ℃.

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