CN219319161U - Water-cooled chiller - Google Patents

Abstract

The utility model discloses a water-cooled water chilling unit which comprises a user terminal, a first cooling device, a first three-way valve assembly and a second cooling device, wherein the first cooling device is filled with cooling water and also comprises a water valve assembly which can discharge the cooling water; the user terminal is respectively connected with the first cooling device and the second cooling device through the first three-way valve assembly to form a first natural cooling loop and a second natural cooling loop, the two loops are arranged in parallel, when the second natural cooling loop is conducted, the first natural cooling loop is disconnected, and high-temperature refrigerant output from the user terminal can be completely conveyed into the second cooling device for cooling; and the water valve assembly is started to discharge the cooling water in the first cooling device, so that the cooling water is prevented from remaining in the first cooling device. Through the arrangement, the hidden danger that the first cooling device is broken by frost cracking caused by freezing of cooling water is avoided, the safety of the first cooling device is ensured, and the water-cooled water chilling unit can continue refrigerating operation in an environment lower than 0 ℃.

Description

Water-cooled chiller

Technical Field

The utility model belongs to the field of refrigeration equipment, and particularly relates to a water-cooled chiller.

Background

In the existing refrigeration equipment, a water-cooled water chilling unit is usually arranged to complete the refrigeration process, and in order to ensure the continuous operation of the refrigeration equipment all the year round, a compressor is required to be configured to enable the refrigerant to continuously circulate among a condenser, an evaporator, a cooling tower and a user side. But the refrigeration mode of the existing water-cooled chiller is single, such that the compressor and the like can operate throughout the year, resulting in serious energy consumption.

The prior art provides a heat-insulating closed cooling system and a cooling method, when the external environment temperature is lower, the cooling system takes a cooling tower as a cold source, adopts a natural cooling mode, takes water cooled in the cooling tower as supplied chilled water, and conveys the chilled water to a user side through an internal circulating pump; then the water is pumped to a cooling tower through an internal circulating water pump to form circulation, and a water chilling unit formed by the evaporator, the condenser and the compressor stops running at the moment, so that the energy consumption is effectively reduced. However, when the heat-insulating closed cooling system is used in an environment with the temperature lower than 0 ℃, water in the cooling tower can freeze and freeze, and high-temperature refrigeration conveyed from a user side to the cooling tower can not be effectively cooled, so that the cooling system can not normally operate, the volume of the frozen water becomes large, and the risk that the cooling tower is frozen easily occurs.

Based on the foregoing, there is a need for a water-cooled chiller that can solve the above-mentioned problems in the prior art.

Disclosure of Invention

The utility model aims to provide a water-cooled water chilling unit which can reduce energy consumption and avoid hidden danger of freezing out a cooling tower.

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

a water cooled chiller, comprising:

a user terminal;

a first cooling device provided with cooling water for cooling a high temperature refrigerant delivered from the user terminal into the first cooling device, the first cooling device comprising a water valve assembly configured to enable the cooling water in the first cooling device to be discharged;

a first three-way valve assembly through which the user terminal and the first cooling device are connected to form a first natural cooling circuit;

a second cooling device capable of cooling the high temperature coolant delivered to the second cooling device from the user terminal, the user terminal and the second cooling device being connected by the first three-way valve assembly to form a second natural cooling loop, the first natural cooling loop and the second natural cooling loop being arranged in parallel, the water-cooled chiller being configured to: when the second natural cooling loop is conducted, the first natural cooling loop is disconnected, so that the high-temperature cooling medium output from the user terminal is conveyed into the second cooling device to be cooled, and cooling water in the first cooling device is discharged out of the first cooling device through the water valve assembly.

Optionally, the water valve assembly includes a water discharge valve and a water delivery valve fixedly connected to the first cooling device, the water discharge valve and the water delivery valve being configured such that when the second natural cooling circuit is on, the water discharge valve is opened to discharge the cooling water in the first cooling device, and the water delivery valve is closed to stop the supply of the cooling water to the first cooling device.

Optionally, the first three-way valve assembly comprises a first three-way valve and a second three-way valve, wherein:

the first three-way valve comprises a first inlet, a first outlet and a second outlet, the outlet end of the user terminal is communicated with the first inlet, the inlet end of the first cooling device is communicated with the first outlet, the inlet end of the second cooling device is communicated with the second outlet, and the first inlet is selectively communicated with the first outlet and the second outlet;

the second three-way valve comprises a second inlet, a third inlet and a third outlet, the outlet end of the first cooling device is communicated with the second inlet, the inlet end of the tail end of the user is communicated with the third outlet, the outlet end of the second cooling device is communicated with the third inlet, and the third outlet is selectively communicated with the second inlet and the third inlet.

Optionally, the water-cooled chiller further includes:

the second three-way valve assembly is arranged in series with the first three-way valve assembly;

the evaporator is connected with the user terminal to form a first conventional refrigeration loop, and the first conventional refrigeration loop is arranged in parallel with the first natural refrigeration loop;

the condenser is connected with the first cooling device through the second three-way valve assembly and the first three-way valve assembly to form a second conventional refrigeration loop;

the compressor is communicated between the evaporator and the condenser;

the expansion valve is communicated between the evaporator and the condenser;

the evaporator and the condenser are configured to: when the water-cooled chiller is in a normal refrigeration mode, the first natural cooling loop is disconnected, and the first normal refrigeration loop and the second normal refrigeration loop are conducted so that the evaporator and the condenser perform cooling treatment on the high-temperature refrigerant.

Optionally, the second three-way valve assembly includes a third three-way valve and a fourth three-way valve, wherein:

the third three-way valve comprises a fourth inlet, a fifth inlet and a fourth outlet, the outlet end of the user terminal is communicated with the fourth inlet, the first inlet is communicated with the fifth outlet, the outlet end of the condenser is communicated with the fifth inlet, and the fourth outlet is selectively communicated with the fourth inlet and the fifth inlet;

the fourth three-way valve comprises a sixth inlet, a fifth outlet and a sixth outlet, the third outlet is communicated with the sixth inlet, the inlet end of the user terminal is communicated with the fifth outlet, the inlet end of the condenser is communicated with the sixth outlet, and the sixth inlet is selectively communicated with the fifth outlet and the sixth outlet.

Optionally, the water-cooled chiller further includes a bypass two-way valve, the bypass two-way valve is disposed in parallel with the first cooling device, and the bypass two-way valve is configured to control a temperature of the low-temperature refrigerant input to the input end of the condenser to a preset value.

Optionally, the water-cooled chiller further includes a first two-way valve and a second two-way valve, the inlet end of the evaporator is connected to the outlet end of the user terminal through the first two-way valve, the outlet end of the evaporator is communicated to the inlet end of the user terminal through the second two-way valve, and the first two-way valve and the second two-way valve are configured to: when the water-cooled chiller unit is in the normal refrigeration mode, the first two-way valve and the second two-way valve are opened so as to conduct the first normal refrigeration loop.

Optionally, the water-cooled chiller further includes a control module, where the control module includes a control module, and the first three-way valve assembly, the second three-way valve assembly, the drain valve assembly, the first two-way valve, the second two-way valve, and the bypass two-way valve are all electrically connected to the control module, and the control module is configured to control opening or closing of each valve according to outdoor environmental conditions.

Optionally, the first cooling device further comprises:

a water tank for containing the cooling water, the water tank being in communication with the water valve assembly;

a first heat exchanger connected to the user terminal through the first three-way valve assembly to form the first natural cooling loop;

and the spraying assembly is configured to spray the cooling water in the water tank onto the first heat exchanger so as to cool the high-temperature refrigerant in the first heat exchanger.

Optionally, the spray assembly includes shower, shower head and spray water pump, the one end of shower communicate in the basin, the other end of shower fixedly set up in the top of first heat exchanger, the shower head fixedly set up in the other end of shower, just the shower head passes through the shower head communicate in the basin, the spray water pump is used for the extraction in the basin the cooling water gets into the shower head.

The water-cooled water chilling unit provided by the utility model has the beneficial effects that: when the second natural cooling loop in the water-cooled chiller is conducted, the first natural cooling loop is disconnected, so that the high-temperature refrigerant output from the user terminal can be completely conveyed into the second cooling device for cooling treatment, and the low-temperature refrigerant formed after cooling is conveyed to the user terminal; simultaneously, the water valve assembly in the first cooling device is started to discharge all the cooling water in the first cooling device, so that the residual cooling water in the first cooling device is prevented. Through the arrangement, the hidden danger that the first cooling device is frozen by cooling water to cause frost cracking damage of the first cooling device is avoided, the safety of the first cooling device is ensured, the water-cooled water chilling unit can continue to perform refrigeration operation in an environment lower than 0 ℃, and the application range of the water-cooled water chilling unit is enlarged.

Drawings

FIG. 1 is a flow chart of a water-cooled chiller provided by the present utility model;

FIG. 2 is a schematic view of a first cooling device according to the present utility model;

FIG. 3 is a schematic view of a second cooling device according to the present utility model;

FIG. 4 is a flow chart of a first natural cooling loop and a second natural cooling loop of the water-cooled chiller provided by the utility model in a natural cooling mode;

FIG. 5 is a schematic view of a first three-way valve according to the present utility model;

FIG. 6 is a schematic diagram of a second three-way valve according to the present utility model;

FIG. 7 is a flow chart of a first natural cooling circuit, a first conventional cooling circuit and a second conventional cooling circuit of the water-cooled chiller provided by the utility model in the process of switching between the conventional cooling mode and the natural cooling mode;

FIG. 8 is a schematic diagram of a third three-way valve according to the present utility model;

fig. 9 is a schematic structural view of a fourth three-way valve according to the present utility model.

In the figure:

1. a user terminal; 2. a first cooling device; 201. a water valve assembly; 2011. a drain valve; 2012. a water delivery valve; 202. a water tank; 203. a first heat exchanger; 204. a spray assembly; 2041. a shower pipe; 2042. a spray water pump; 2043. a spray header; 205. a cooling fan; 3. a first three-way valve assembly; 301. a first three-way valve; 3011. a first inlet; 3012. a first outlet; 3013. a second outlet; 302. a second three-way valve; 3021. a second inlet; 3022. a third inlet; 3023. a third outlet; 4. a second cooling device; 401. a second heat exchanger; 402. a cooling fan; 5. a second three-way valve assembly; 501. a third three-way valve; 5011. a fourth inlet; 5012. a fifth inlet; 5013. a fourth outlet; 502. a fourth three-way valve; 5021. a sixth inlet; 5022. a fifth outlet; 5023. a sixth outlet; 6. an evaporator; 7. a condenser; 8. a compressor; 9. an expansion valve; 10. a first pump; 11. a second pump; 13. a first two-way valve; 14. a second two-way valve; 15. bypass branch two-way valve.

Detailed Description

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

When the existing water-cooled chiller is in a natural cooling mode for operation, namely, the ambient temperature is in the range of 3-6 ℃, in order to avoid energy consumption, the compressor can stop working at the moment, and the high-temperature cold-carrying medium is cooled by cooling water cooled after the external cold air is absorbed in the cooling device, so that the low-temperature cold-carrying medium is formed by the high-temperature cold-carrying medium, and the low-temperature cold-carrying medium is conveyed to a user side again to complete the cooling requirement. However, when the temperature of the external environment is lower than 0 ℃, the cooling water in the cooling device can be frozen, so that the cooling device is damaged by freezing, and the refrigerating effect of the cooling device is seriously affected. Therefore, the utility model provides a water-cooled water chilling unit, which can solve the problems of the existing water-cooled water chilling unit and enable the water-cooled water chilling unit to continue to stably run in a working environment below 0 ℃.

The following describes a water-cooled chiller provided by the present utility model with reference to fig. 1 to 9. As shown in fig. 1 and 2, the water-cooled chiller system comprises a user terminal 1, a first cooling device 2, a first three-way valve assembly 3 and a second cooling device 4, wherein the bottom of the first cooling device 2 is provided with cooling water which can cool high-temperature refrigerant which is conveyed into the first cooling device 2 from the user terminal 1, the first cooling device 2 comprises a water valve assembly 201, and the water valve assembly 201 can discharge the cooling water in the first cooling device 2; the user terminal 1 and the first cooling device 2 are connected through the first three-way valve assembly 3 to form a first natural cooling circuit; the second cooling device 4 is capable of cooling the high temperature refrigerant delivered from the user terminal 1 into the second cooling device 4, and the user terminal 1 and the second cooling device 4 are connected through the first three-way valve assembly 3 to form a second natural cooling circuit, and the first natural cooling circuit and the second natural cooling circuit are arranged in parallel. Through the arrangement, when the environment temperature is in the working environment below 0 ℃, the second natural cooling loop is conducted, the first natural cooling loop is disconnected, the high-temperature refrigerant output from the user terminal 1 is completely conveyed into the second cooling device 4 to be cooled, and cooling water in the first cooling device 2 is discharged to the first cooling device 2 through the water valve assembly 201, so that the risk that the first cooling device 2 is damaged by frost cracking is avoided, the use safety of the first cooling device 2 is ensured, and the water cooling cold water system can be operated in normal refrigeration in the environment below 0 ℃.

In this embodiment, referring to fig. 2, the first cooling device 2 is a closed cooling tower, so as to prevent the external environment from causing a dirty blockage inside the first cooling device 2. The closed cooling tower comprises a water tank 202 for containing cooling water, wherein the water tank 202 is arranged at the bottom of the closed cooling tower, and a water valve assembly 201 is communicated with the water tank 202; the first heat exchanger 203 is fixedly arranged at the top of the closed cooling tower, the first heat exchanger 203 is preferably a coiled heat exchanger, the heat exchange efficiency can be effectively improved, and the first heat exchanger 203 is connected with the user terminal 1 through the first three-way valve assembly 3 to form the first natural cooling loop. It will be appreciated that in other embodiments, the first cooling tower may be an open cooling tower to reduce cost and to save money.

Further, the closed cooling tower further comprises a spraying assembly 204, and the spraying assembly 204 can spray the cooling water in the water tank 202 onto the first heat exchanger 203, so that the high-temperature refrigerant conveyed from the user terminal 1 to the first heat exchanger 203 can be cooled by the cooling water.

Specifically, as shown in fig. 2, the spray assembly 204 includes a spray pipe 2041, a spray water pump 2042 and a spray header 2043, wherein one end of the spray pipe 2041 is communicated with the water tank 202, the other end of the spray pipe 2041 is fixedly arranged above the first heat exchanger 203, the spray header 2043 is fixedly arranged at the other end of the spray pipe 2041, the spray header 2043 is communicated with the water tank 202 through the spray pipe 2041, and the spray water pump 2042 can pump cooling water in the water tank 202 to be conveyed to the spray header 2043 along the spray pipe 2041 so as to complete the cooling process of the high-temperature refrigerant.

Optionally, with continued reference to fig. 2, the water valve assembly 201 includes a water drain valve 2011 and a water delivery valve 2012 that are fixedly connected to the first cooling device 2, in this embodiment, the water drain valve 2011 is connected to a bottom of the water tank 202, the water delivery valve 2012 is connected to one of tank walls of the water tank 202, when the water-cooled chiller is in an environment below 0 ℃, the water drain valve 2011 is opened to drain cooling water in the water tank 202, and the water delivery valve 2012 is closed to stop supplying cooling water to the water tank 202, so that the cooling water in the water tank 202 is drained, the risk of freezing the cooling water in the water tank 202 is avoided, and the use safety of the first cooling device 2 is ensured.

More specifically, the first cooling device 2 in this embodiment further includes a cooling fan 205, where the cooling fan 205 is fixedly disposed at the top of the first cooling device 2, when the water-cooled chiller performs a cooling operation in a natural cooling mode within an ambient temperature range of 3-6 ℃, the first natural cooling circuit is turned on, the high-temperature refrigerant output from the user terminal 1 is delivered to the first heat exchanger 203 through the first three-way valve assembly 3, and after the high-temperature refrigerant in the first heat exchanger 203 exchanges heat with the cooling water sprayed by the shower head 2043, the released heat can be delivered to the outside of the first cooling device 2 by the cooling fan 205, so as to maintain the temperature in the first cooling device 2 at a preset range value.

Alternatively, as shown in fig. 3, in the present embodiment, the second cooling device 4 includes a second heat exchanger 401, and the second heat exchanger 401 is preferably a fin type heat exchanger including heat exchange tubes and fins provided outside the heat exchange tubes, thereby greatly increasing the heat exchange area of the second heat exchanger 401 in order to improve the cooling efficiency of the high-temperature refrigerant. In order to further improve the heat exchange efficiency of the second heat exchanger 401, the second cooling device 4 further includes two cooling fans 402 disposed at the top of the second heat exchanger 401, the two cooling fans 402 are disposed at two ends of the second heat exchanger 401 at intervals, one cooling fan 402 conveys external cold air into the second heat exchanger 401, so that the cold air cools the high-temperature refrigerant in the second heat exchanger 401, and then the other cooling fan 402 discharges the released heat to the external environment, thereby improving the cooling efficiency of the second heat exchanger 401 and ensuring that the temperature in the second cooling device 4 is kept within a preset range.

As shown in connection with fig. 4, 5 and 6, the first three-way valve assembly 3 comprises a first three-way valve 301 and a second three-way valve 302, wherein the first three-way valve 301 comprises a first inlet 3011, a first outlet 3012 and a second outlet 3013, in this embodiment, the outlet end of the user terminal 1 is in communication with the first inlet 3011, the inlet end of the first heat exchanger 203 is in communication with the first outlet 3012, the inlet end of the second heat exchanger 401 is in communication with the second outlet 3013, and the first inlet 3011 is in communication with the first outlet 3012 and the second outlet 3013; the second three-way valve 302 assembly includes a second inlet 3021, a third inlet 3022 and a third outlet 3023, the outlet end of the first heat exchanger 203 is in communication with the second inlet 3021, the inlet end of the user terminal 1 is in communication with the third outlet 3023, the outlet end of the second cooling device 4 is in communication with the third inlet 3022, and the third outlet 3023 is in communication with the second inlet 3021 and the third inlet 3022. In specific use, illustratively, when the water-cooled chiller is at an ambient temperature of 3-6 ℃, the first inlet 3011 is communicated with the first outlet 3012, the second inlet 3021 is communicated with the third outlet 3023, at this time the first natural cooling circuit is on, the second natural cooling circuit is off, and the high-temperature refrigerant output from the user terminal 1 is only delivered into the first heat exchanger 203 for cooling; when the water-cooled chiller is below 3 ℃, the first inlet 3011 is communicated with the second outlet 3013, the third inlet 3022 is communicated with the third outlet 3023, at this time, the first natural cooling circuit is disconnected, the second natural cooling circuit is conducted, and the high-temperature refrigerant output from the user terminal 1 is only conveyed into the second heat exchanger 401 for cooling. By the arrangement, the water-cooled chiller can decide whether the cold source is taken from the first heat exchanger 203 or the second heat exchanger 401 according to the actual working environment.

In this embodiment, when the ambient temperature is lower than 3 ℃, the first inlet 3011 of the first three-way valve 301 is switched to communicate with the second outlet 3013, and the third inlet 3022 of the second three-way valve 302 is switched to communicate with the third outlet 3023, so as to conduct the second natural cooling circuit. Compared with the process that the second natural cooling loop is conducted when the ambient temperature is at 0 ℃, the second natural cooling loop is conducted by intervention of 3 ℃ in advance, the situation that the cooling water in the water tank 202 is frozen before the high-temperature refrigerant is input into the second heat exchanger 401 can be prevented, so that the hidden danger that the first cooling device 2 is frozen and cracked by the cooling water can be fundamentally avoided, the use safety of the first cooling device 2 is ensured, and the energy consumption of the water-cooled water chilling unit is reduced.

Optionally, referring to fig. 7 to 9, in the present embodiment, the water-cooled chiller further includes a second three-way valve assembly 5, an evaporator 6, a condenser 7, a compressor 8 and an expansion valve 9, wherein the second three-way valve assembly 5 is disposed in series with the first three-way valve assembly 3, the evaporator 6 is connected with the user terminal 1 to form a first conventional refrigeration circuit, the first conventional refrigeration circuit is disposed in parallel with the first natural refrigeration circuit, the condenser 7 is connected with the first cooling apparatus 2 through the second three-way valve assembly 5 and the first three-way valve assembly 3 to form a second conventional refrigeration circuit, and the compressor 8 and the expansion valve 9 are both disposed in communication between the evaporator 6 and the condenser 7. When the water-cooled chiller is in a normal refrigeration mode, that is, when the ambient temperature is 15 ℃ or above in the embodiment, the first natural cooling circuit is disconnected, the first normal cooling circuit and the second normal cooling circuit are connected, the compressor 8 and the expansion valve 9 are both started, at the moment, high-temperature refrigerant output from the user terminal 1 is conveyed into the evaporator 6 to provide heat for liquid refrigerant in the evaporator 6, so that the liquid refrigerant in the evaporator 6 absorbs heat and evaporates to form a gaseous refrigerant, and the high-temperature refrigerant is cooled to form a low-temperature refrigerant, and the low-temperature refrigerant is conveyed into the user terminal 1 again; the gaseous refrigerant in the evaporator 6 is sent to the condenser 7 through the compressor 8, the low-temperature refrigerant output from the first cooling device 2 is sent to the condenser 7 through the second conventional refrigeration loop and is contacted with the high-temperature gaseous refrigerant, the high-temperature gaseous refrigerant is liquefied into a liquid refrigerant when meeting cold, and then is sent to the evaporator 6 again through the expansion valve 9, and the low-temperature refrigerant in the condenser 7 absorbs heat to form a high-temperature refrigerant and then is sent to the first cooling device 2 again for cooling. By arranging the first conventional refrigeration loop and the second conventional refrigeration loop, the refrigeration process of the water-cooled chiller under the conventional refrigeration mode is realized.

Specifically, in the present embodiment, the second three-way valve assembly 5 includes a third three-way valve 501 and a fourth three-way valve 502 as shown in fig. 8, wherein the third three-way valve 501 includes a fourth inlet 5011, a fifth inlet 5012, and a fourth outlet 5013, the outlet end of the user terminal 1 communicates with the fourth inlet 5011, the first inlet 3011 and the fifth outlet 5022 communicate, the outlet end of the condenser 7 communicates with the fifth inlet 5012, and the fourth outlet 5013 communicates with either the fourth inlet 5011 or the fifth inlet 5012; the fourth three-way valve 502 includes a sixth inlet 5021, a fifth outlet 5022 and a sixth outlet 5023 as shown in fig. 9, the third outlet 3023 is in communication with the sixth inlet 5021, the inlet end of the user terminal 1 is in communication with the fifth outlet 5022, the inlet end of the condenser 7 is in communication with the sixth outlet 5023, and the sixth inlet 5021 is in communication with the fifth outlet 5022 and the sixth outlet 5023. In actual use, when the water-cooled chiller is used at an ambient temperature of 15 ℃ and above, and in a normal refrigeration mode, the fourth outlet 5013 is disconnected from the fourth inlet 5011 and is connected to the fifth inlet 5012, the sixth inlet 5021 and the fifth outlet 5022 are disconnected and are connected to the sixth outlet 5023, the first natural cooling circuit is disconnected, the first normal cooling circuit and the second normal cooling circuit are connected, and the cold source of the user terminal 1 is commonly provided by the condenser 7, the evaporator 6 and the first cooling device 2; when the fourth outlet 5013 is disconnected from the fifth inlet 5012 and is connected to the fourth inlet 5011, and the sixth inlet 5021 is disconnected from the sixth outlet 5023 and is connected to the fifth outlet 5022, the first natural cooling circuit is turned on, the first conventional cooling circuit and the second conventional cooling circuit are disconnected, and the cooling source of the end unit is provided by the first cooling device 2 only. Therefore, a person skilled in the art can select the operation mode by changing the conduction condition of the second three-way valve assembly 5 according to the actual operation environment condition of the water-cooled chiller.

More specifically, in the present embodiment, the first pump 10 is further provided between the third outlet 3023 and the sixth inlet 5021, which can improve the transmission efficiency of the low-temperature refrigerant outputted from the first cooling device 2 or from the second cooling device 4, thereby effectively improving the cooling efficiency of the water-cooled chiller. Of course, the present utility model is not limited to the installation position of the first pump 10, and it is within the scope of the present utility model as long as the improvement of the transfer efficiency of the low-temperature refrigerant outputted from the first cooling device 2 or from the second cooling device 4 can be satisfied.

Further, as shown in fig. 7, in the present embodiment, the water-cooled chiller further includes a first two-way valve 13 and a second two-way valve 14, wherein the inlet end of the evaporator 6 is connected to the outlet end of the user terminal 1 through the first two-way valve 13, and the outlet end of the evaporator 6 is connected to the inlet end of the user terminal 1 through the second two-way valve 14. By arranging the first two-way valve 13 and the second two-way valve 14, when the water-cooled chiller is in the normal refrigeration mode, the first two-way valve 13 and the second two-way valve 14 are opened, so that the first normal refrigeration loop is conducted, the control is convenient, and the conversion efficiency of the water-cooled chiller between the normal refrigeration mode and the natural cooling mode is improved.

Specifically, in the present embodiment, a second pump 11 is further provided between the inlet end of the evaporator 6 and the outlet end of the user terminal 1, which can improve the transmission efficiency of the low-temperature refrigerant outputted from the evaporator 6 to improve the cooling efficiency of the water-cooled chiller in the normal cooling mode. Of course, the present utility model is not limited to the installation position of the second pump 11, and the second pump 11 may be installed between the outlet end of the evaporator 6 and the inlet end of the user terminal 1, and it is within the scope of the present utility model as long as the efficiency of transferring the low-temperature refrigerant outputted from the evaporator 6 can be improved.

Optionally, with continued reference to fig. 7, the water-cooled chiller further includes a bypass two-way valve 15 disposed in parallel with the first cooling apparatus 2, where the bypass two-way valve 15 can control the temperature of the low-temperature refrigerant input to the input end of the condenser 7 to a preset value, so that the compressor 8 can be normally used at a lower temperature, for example, at an ambient temperature of 6-15 ℃, without auxiliary equipment, and compared with the compressor 8 in the conventional water-cooled chiller, which can only normally operate at an ambient temperature of 15 ℃ or above without auxiliary equipment, the application range of the compressor 8 in the embodiment is wider and the adaptability is stronger. Illustratively, when it is detected that the temperature of the low-temperature refrigerant outputted from the output end of the first cooling device 2 is close to the lower limit value of the safe-use temperature range of the compressor 8, the bypass-branch two-way valve 15 is opened at this time, so that the high-temperature refrigerant outputted from the condenser 7 can be delivered into the condenser 7 again through the bypass-branch two-way valve 15, and in this process, the temperature in the condenser 7 can be raised due to the high-temperature refrigerant being delivered into the condenser 7, thereby effectively avoiding the situation that the temperature of the working environment of the compressor 8 is lower than the normal working lower limit value of the compressor 8; when it is detected that the temperature of the refrigerant input to the condenser 7 is at the upper limit value of the safe use range of the compressor 8, the bypass two-way valve 15 is interrupted, so that the high-temperature refrigerant output from the condenser 7 can be entirely delivered to the first cooling device 2 for cooling, thereby reducing the temperature of the refrigerant delivered into the condenser 7 to ensure that the compressor 8 can normally operate within a proper preset temperature range.

Preferably, the bypass two-way valve 15 is a proportional two-way valve, when the bypass two-way valve 15 is opened, a part of the high-temperature refrigerant output from the condenser 7 is directly returned to the condenser 7 through the bypass two-way valve 15, and the other part of the high-temperature refrigerant output from the condenser 7 is directly conveyed to the first cooling device 2 for cooling, and the low-temperature refrigerant formed after cooling is conveyed to the condenser 7. By providing the bypass two-way valve 15 as a proportional two-way valve, the temperature of the refrigerant delivered into the condenser 7 is controlled to be within a suitable range of values.

Optionally, the water-cooled chiller further includes a control assembly (not shown in the figure), where the control assembly includes a control module, and the first three-way valve assembly 3, the second three-way valve assembly 5, the water valve assembly 201, the first two-way valve 13, the second two-way valve 14, and the bypass two-way valve 15 are all electrically connected with the control module, and the control module can automatically control opening or closing of each valve according to outdoor environmental conditions, so as to improve the intelligent control degree of the water-cooled chiller.

Further, in this embodiment, the control module further includes a temperature sensing device and a temperature signal receiver, where the temperature sensing device is connected to the first heat exchanger 203 and the second heat exchanger 401, and is capable of sensing the temperature of the low-temperature refrigerant output from the first heat exchanger 203 and the low-temperature refrigerant output from the second heat exchanger 401, and transmitting a temperature signal to the temperature signal receiver, and the temperature signal receiver transmits the temperature signal to the control module, and the control module controls the rotation efficiency of the cooling fan 402 and the cooling fan 205, so as to ensure the normal cooling operation of the water-cooled chiller. In addition, the user terminal 1 may also transmit temperature values set by different demands to the control module, and the rotation efficiency of the cooling fan 402 and the cooling fan 205 is controlled by the control module to change the temperature value of the low-temperature refrigerant outputted from the first cooling device 2 or the second cooling device 4.

It can be understood that the control module can be a PLC control module, a PID control module and the like, and the temperature sensing device can be a thermocouple resistor, a thermocouple and other thermometers, so that the temperature sensing device is easy to obtain and convenient to use, and the basic requirement of the water-cooled chiller can be met.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The water-cooled cooling water set, its characterized in that includes:

a user terminal (1);

-a first cooling device (2) provided with cooling water for cooling a high temperature refrigerant delivered from the user terminal (1) into the first cooling device (2), the first cooling device (2) comprising a water valve assembly (201), the water valve assembly (201) being configured to enable the cooling water in the first cooling device (2) to be discharged;

a first three-way valve assembly (3), the user terminal (1) and the first cooling device (2) being connected by the first three-way valve assembly (3) to form a first natural cooling circuit;

-a second cooling device (4) capable of cooling the high temperature coolant delivered to the second cooling device (4) from the user terminal (1), the user terminal (1) and the second cooling device (4) being connected by means of the first three-way valve assembly (3) forming a second natural cooling circuit, the first natural cooling circuit and the second natural cooling circuit being arranged in parallel, the water-cooled chiller being configured to: when the second natural cooling loop is conducted, the first natural cooling loop is disconnected, so that the high-temperature cooling medium output from the user terminal (1) is conveyed into the second cooling device (4) to be cooled, and the cooling water in the first cooling device (2) is discharged out of the first cooling device (2) through the water valve assembly (201).

2. The water chiller according to claim 1 wherein the water valve assembly (201) comprises a water drain valve (2011) and a water delivery valve (2012) fixedly connected to the first cooling device (2), the water drain valve (2011) and the water delivery valve (2012) being configured such that when the second natural cooling circuit is on, the water drain valve (2011) opens to drain the cooling water within the first cooling device (2) and the water delivery valve (2012) closes to stop the supply of the cooling water to the first cooling device (2).

3. The water-cooled chiller according to claim 2 wherein the first three-way valve assembly (3) comprises a first three-way valve (301) and a second three-way valve (302), wherein:

the first three-way valve (301) comprises a first inlet (3011), a first outlet (3012) and a second outlet (3013), the outlet end of the user terminal (1) is communicated with the first inlet (3011), the inlet end of the first cooling device (2) is communicated with the first outlet (3012), the inlet end of the second cooling device (4) is communicated with the second outlet (3013), and the first inlet (3011) is communicated with the first outlet (3012) and the second outlet (3013) alternatively;

the second three-way valve (302) comprises a second inlet (3021), a third inlet (3022) and a third outlet (3023), the outlet end of the first cooling device (2) is communicated with the second inlet (3021), the inlet end of the user terminal (1) is communicated with the third outlet (3023), the outlet end of the second cooling device (4) is communicated with the third inlet (3022), and the third outlet (3023) is alternatively communicated with the second inlet (3021) and the third inlet (3022).

4. The water-cooled chiller of claim 3 further comprising:

a second three-way valve assembly (5) arranged in series with the first three-way valve assembly (3);

an evaporator (6) connected with the user terminal (1) to form a first conventional refrigeration loop, wherein the first conventional refrigeration loop is arranged in parallel with the first natural cooling loop;

a condenser (7) connected to the first cooling device (2) through the second three-way valve assembly (5) and the first three-way valve assembly (3) to form a second conventional refrigeration circuit;

a compressor (8) which is provided in communication between the evaporator (6) and the condenser (7);

an expansion valve (9) which is provided in communication between the evaporator (6) and the condenser (7);

the evaporator (6) and the condenser (7) are configured to: when the water-cooled chiller is in a normal refrigeration mode, the first natural cooling loop is disconnected, and the first normal refrigeration loop and the second normal refrigeration loop are conducted so that the evaporator (6) and the condenser (7) perform cooling treatment on the high-temperature refrigerant.

5. The water-cooled chiller according to claim 4 wherein the second three-way valve assembly (5) comprises a third three-way valve (501) and a fourth three-way valve (502), wherein:

the third three-way valve (501) comprises a fourth inlet (5011), a fifth inlet (5012) and a fourth outlet (5013), the outlet end of the user terminal (1) is communicated with the fourth inlet (5011), the first inlet (3011) is communicated with the fourth outlet (5013), the outlet end of the condenser (7) is communicated with the fifth inlet (5012), and the fourth outlet (5013) is communicated with the fourth inlet (5011) and the fifth inlet (5012);

the fourth three-way valve (502) comprises a sixth inlet (5021), a fifth outlet (5022) and a sixth outlet (5023), the third outlet (3023) is communicated with the sixth inlet (5021), the inlet end of the user terminal (1) is communicated with the fifth outlet (5022), the inlet end of the condenser (7) is communicated with the sixth outlet (5023), and the sixth inlet (5021) is selectively communicated with the fifth outlet (5022) and the sixth outlet (5023).

6. The water-cooled chiller according to claim 5 further comprising a bypass two-way valve (15), the bypass two-way valve (15) being disposed in parallel with the first cooling arrangement (2), the bypass two-way valve (15) being configured to control the temperature of the low temperature refrigerant input to the input of the condenser (7) to a preset value.

7. The water-cooled chiller according to claim 6 further comprising a first two-way valve (13) and a second two-way valve (14), the inlet end of the evaporator (6) being connected to the outlet end of the user terminal (1) by the first two-way valve (13), the outlet end of the evaporator (6) being in communication with the inlet end of the user terminal (1) by the second two-way valve (14), the first two-way valve (13) and the second two-way valve (14) being configured to: when the water-cooled chiller is in the normal refrigeration mode, the first two-way valve (13) and the second two-way valve (14) are opened to conduct the first normal refrigeration loop.

8. The water-cooled chiller according to claim 7 further comprising a control assembly comprising a control module, the first three-way valve assembly (3), the second three-way valve assembly (5), the water valve assembly (201), the first two-way valve (13), the second two-way valve (14) and the bypass two-way valve (15) each being electrically connected to the control module, the control module being configured to control opening or closing of each valve in accordance with outdoor environmental conditions.

9. The water-cooled chiller according to claim 1 wherein the first cooling arrangement (2) further comprises:

-a water tank (202) for containing said cooling water, said water tank (202) being in communication with said water valve assembly (201);

-a first heat exchanger (203) connected to the user terminal (1) by means of the first three-way valve assembly (3) forming the first natural cooling circuit;

-a spray assembly (204) configured to spray the cooling water within the water tank (202) onto the first heat exchanger (203) to cool the high temperature refrigerant within the first heat exchanger (203).

10. The water-cooled chiller according to claim 9 wherein the spray assembly (204) comprises a spray pipe (2041), a spray header and a spray water pump (2043), wherein one end of the spray pipe (2041) is communicated with the water tank (202), the other end of the spray pipe (2041) is fixedly arranged above the first heat exchanger (203), the spray header is fixedly arranged at the other end of the spray pipe (2041), the spray header is communicated with the water tank (202) through the spray pipe (2041), and the spray water pump (2043) is used for pumping the cooling water in the water tank (202) into the spray header.

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