Water cooler

Abstract

The utility model provides a cooling-water machine which comprises a water tank and an outer circulation loop, and the water tank is used for providing cooling liquid. The outer circulation loop comprises a first pipeline, a second pipeline and a third pipeline; wherein a first liquid outlet of the water tank is connected with one end of the first pipeline, the other end of the first pipeline is used for being connected with a liquid inlet of a workpiece, and the first pipeline is further provided with a connecting port; a first liquid inlet of the water tank is connected with one end of the second pipeline, and the other end of the second pipeline is used for being connected with a liquid outlet of a workpiece. One end of the third pipeline is connected to the connecting port, and the other end of the third pipeline is used for introducing gas; a liquid outlet valve is arranged on the first pipeline on one side, close to the water tank, of the connecting port; a water return valve is arranged on the second pipeline; and an air inlet valve is arranged on the third pipeline. It can be seen that the cooling-water machine has multiple functions and purposes.

Description

Technical Field

[0001] This application belongs to the technical field of water chillers, and more specifically, relates to a water chiller. Background Art

[0002] With the booming development of the new energy industry, when testing a battery pack, it is necessary to introduce a coolant into the battery pack for cooling. At the same time, when detecting the airtightness of the battery pack, compressed gas needs to be introduced into the battery pack. Currently, general water chillers can only introduce coolant into the battery pack and cannot introduce compressed gas. Utility Model Content

[0003] This application aims to provide a water chiller to solve at least one of the technical problems mentioned in the above background art.

[0004] The technical solution adopted in this application is a water chiller, including a water tank and an external circulation loop. The water tank is used to provide a cooling liquid;

[0005] The external circulation loop includes a first pipeline, a second pipeline, and a third pipeline; among them,

[0006] The first liquid outlet of the water tank is connected to one end of the first pipeline, and the other end of the first pipeline is used to connect to the liquid inlet of the workpiece. A connection port is also provided on the first pipeline;

[0007] The first liquid inlet of the water tank is connected to one end of the second pipeline, and the other end of the second pipeline is used to connect to the liquid outlet of the workpiece;

[0008] One end of the third pipeline is connected to the connection port, and the other end of the third pipeline is used to introduce gas; and

[0009] A liquid outlet valve is provided on the first pipeline on the side of the connection port close to the water tank;

[0010] A return water valve is provided on the second pipeline;

[0011] An air inlet valve is provided on the third pipeline.

[0012] It can be seen that in the chiller of the present application, the water tank is respectively connected to the liquid inlet and the liquid outlet of the workpiece through the first pipeline and the second pipeline, and can realize the introduction of liquid into the workpiece for cooling. In addition, the first pipeline is also connected to a third pipeline through a connection port. In this way, the third pipeline can introduce gas into the workpiece through the first pipeline, which can realize the drying of the residual liquid in the workpiece. And an air inlet valve is provided on the third pipeline to prevent the simultaneous introduction of liquid and gas into the first pipeline. Finally, a liquid outlet valve is provided on the first pipeline on the side of the connection port close to the water tank, and a return water valve is provided on the second pipeline. When the liquid outlet valve closes the first pipeline and the return water valve closes the second pipeline, the gas introduced into the workpiece by the third pipeline can realize the airtightness detection of the workpiece.

[0013] That is to say, the chiller of the present application can realize the cooling of the workpiece, can simultaneously dry the residual liquid in the workpiece, and can also realize the airtightness detection of the workpiece. The chiller has multiple functions and uses.

[0014] Optionally, a buffer tank is provided at a position in the water tank corresponding to the first liquid inlet, and the buffer tank is used to receive the liquid or gas flowing into the water tank from the first liquid inlet;

[0015] The buffer tank is provided with an overflow port, and the overflow port allows the liquid in the buffer tank to flow into the water tank; and

[0016] The overflow port is provided at the top of the buffer tank.

[0017] Optionally, an air outlet is provided at a position in the water tank far from the first liquid outlet.

[0018] Optionally, a first pressure sensor is provided between one end of the second pipeline connected to the workpiece and the return water valve;

[0019] An air inlet proportional regulating valve is also provided on the third pipeline.

[0020] Optionally, a liquid supply circulation pump is provided on the first pipeline on the side of the connection port close to the water tank;

[0021] A flow meter is provided on the first pipeline on the side of the connection port close to the water tank;

[0022] A second pressure sensor is provided on the first pipeline on the side of the connection port close to the water tank; and

[0023] A filter is provided on the first pipeline.

[0024] Optionally, a first temperature sensor is also provided on the second pipeline; and

[0025] The first temperature sensor is disposed on one side of the return water valve close to the water tank.

[0026] Optionally, at least two sets of the external circulation circuits are provided; and

[0027] One first liquid outlet of the water tank is connected to one end of the first pipeline of one set of the external circulation circuits, and one first liquid inlet of the water tank is connected to one end of the second pipeline of one set of the external circulation circuits.

[0028] Optionally, a heater is disposed in the water tank;

[0029] A second temperature sensor is disposed in the water tank; and

[0030] A liquid level sensor is disposed in the water tank.

[0031] Optionally, a cooling device and an internal circulation circuit are further included; wherein,

[0032] The internal circulation circuit includes a fourth pipeline and a fifth pipeline. The second liquid outlet of the water tank is connected to the liquid inlet of the cooling device through the fourth pipeline, and the liquid outlet of the cooling device is connected to the second liquid inlet of the water tank through the fifth pipeline.

[0033] Optionally, a refrigeration circulation pump is provided on the fourth pipeline; and

[0034] A flow switch is provided on the fourth pipeline.

[0035] Optionally, the cooling device includes a condenser, a plate heat exchanger, a sixth pipeline, a seventh pipeline and an eighth pipeline; wherein,

[0036] The inlet of the condenser is respectively connected to one ends of the sixth pipeline and the seventh pipeline, the outlet of the condenser is connected to one end of the eighth pipeline, the other end of the sixth pipeline is connected to the first outlet of the plate heat exchanger, and the other ends of the seventh pipeline and the eighth pipeline are respectively connected to the first inlet of the plate heat exchanger;

[0037] The first pipeline is connected to the second inlet of the plate heat exchanger, and the second pipeline is connected to the second outlet of the plate heat exchanger; and

[0038] A compressor or a refrigeration circulation pump is provided on the sixth pipeline, a bypass valve is provided on the seventh pipeline, and an electronic expansion valve is provided on the eighth pipeline. Description of the Drawings

[0039] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 Structural schematic diagram of a chiller provided by an embodiment of the present application;

[0041] Figure 2 Structural schematic diagram of an internal circulation loop in a chiller provided by an embodiment of the present application;

[0042] Figure 3 Structural schematic diagram of an external circulation loop in a chiller provided by an embodiment of the present application;

[0043] Figure 4 Structural schematic diagram of a water tank in a chiller provided by an embodiment of the present application;

[0044] Figure 5 Structural schematic diagram of a cooling device in a chiller provided by an embodiment of the present application.

[0045] Reference numerals:

[0046] 100, cooling device; 110, condenser; 120, plate heat exchanger; 130, sixth pipeline; 140, seventh pipeline; 150, eighth pipeline; 160, bypass valve; 170, electronic expansion valve; 180, compressor;

[0047] 200, water tank; 210, heater; 220, second temperature sensor; 230, liquid level sensor;

[0048] 300, internal circulation loop; 310a, fourth pipeline; 310b, fifth pipeline; 320, refrigeration circulation pump; 330, flow switch;

[0049] 400, external circulation loop; 410a, first pipeline; 410b, second pipeline; 410c, third pipeline; 420, liquid outlet valve; 430, intake valve; 440, return water valve; 450a, first pressure sensor; 450b, second pressure sensor; 460, intake proportional regulating valve; 470, supply liquid circulation pump; 480, flowmeter; 490a, filter; 490b, first temperature sensor;

[0050] 500, buffer tank; 510, overflow port;

[0051] 600, workpiece. Specific embodiments

[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] It should be noted that when a first component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a first component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0054] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0055] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of some applications, "a plurality of" means two or more unless otherwise specifically defined.

[0056] As Figure 1 and Figure 2 shown, the present application provides a chiller, which includes a water tank 200 and an external circulation loop 400. Among them, the water tank 200 can provide a cooling liquid, and the external circulation loop 400 is used to enable the liquid in the water tank 200 to flow through a workpiece 600, and the external circulation loop 400 can introduce a gas into the workpiece 600.

[0057] Referring to Figure 3 , the external circulation loop 400 includes a first pipeline 410a, a second pipeline 410b and a third pipeline 410c.

[0058] A first liquid outlet of the water tank 200 is connected to one end of the first pipeline 410a, and the other end of the first pipeline 410a is used to connect to a liquid inlet of the workpiece 600. A connection port (not marked in the figure) is also provided on the first pipeline 410a.

[0059] One end of the first liquid inlet of the water tank 200 is connected to one end of the second pipeline 410b, and the other end of the second pipeline 410b is used to connect to the liquid outlet of the workpiece 600.

[0060] When cooling the workpiece 600, connect the liquid inlet of the workpiece 600 to the first pipeline 410a, and connect the liquid outlet of the workpiece 600 to the second pipeline 410b. The liquid in the water tank 200 can flow into the workpiece 600 through the first pipeline 410a and flow back to the water tank 200 through the first pipeline 410a, realizing the cyclic flow of the liquid in the external circulation loop 400. Among them, the workpiece 600 can be a battery pack.

[0061] Further, one end of the third pipeline 410c is connected to the connection port, and the other end of the third pipeline 410c is used to introduce gas.

[0062] It can be understood that after the liquid is introduced into the workpiece 600, it is necessary to blow dry the remaining liquid inside the workpiece 600 subsequently. At this time, the gas introduced into the third pipeline 410c can blow the gas into the workpiece 600 through the first pipeline 410a and blow out the liquid in the workpiece 600 from the second pipeline 410b. In some embodiments, the end of the third pipeline 410c where the gas is introduced can be connected to an air compressor 180, and the air compressor 180 is used to introduce compressed gas into the third pipeline 410c.

[0063] Further, a liquid outlet valve 420 can also be provided on the first pipeline 410a on the side of the connection port close to the water tank 200.

[0064] The liquid outlet valve 420 is used to prevent the liquid in the first pipeline 410a from continuing to flow into the workpiece 600, and at the same time does not affect the introduction of gas from the third pipeline 410c into the first pipeline 410a. Among them, the liquid outlet valve 420 can be a solenoid valve.

[0065] Further, an air inlet valve 430 can also be provided on the third pipeline 410c, and the air inlet valve 430 is used to control the gas to enter the first pipeline 410a, that is, to control whether to introduce gas into the workpiece 600.

[0066] Further, a return water valve 440 can also be provided on the second pipeline 410b.

[0067] It can be understood that in some embodiments, the workpiece 600 needs to be subjected to airtightness detection. At this time, the channel of the second pipeline 410b can be closed by the return water valve 440. In this way, the gas introduced into the workpiece 600 through the first pipeline 410a by the third pipeline 410c will no longer flow to the water tank 200 through the second pipeline 410b, but will stay in the workpiece 600 to realize the airtightness detection of the workpiece 600.

[0068] It can be seen that in the chiller of the present application, the water tank 200 can provide a cooling liquid. The water tank 200 is respectively connected to the liquid inlet and the liquid outlet of the workpiece 600 through the first pipeline 410a and the second pipeline 410b, and can realize the introduction of liquid into the workpiece 600 for cooling. In addition, the first pipeline 410a is also connected to a third pipeline 410c through a connection port. In this way, the third pipeline 410c can introduce gas into the workpiece 600 through the first pipeline 410a, which can realize the drying of the residual liquid in the workpiece 600. An intake valve 430 is provided on the third pipeline 410c to prevent the simultaneous introduction of liquid and gas into the first pipeline 410a. Finally, a liquid outlet valve 420 is provided on the first pipeline 410a on the side close to the water tank 200 of the connection port, and a return water valve 440 is provided on the second pipeline 410b. When the liquid outlet valve 420 closes the first pipeline 410a and the return water valve 440 closes the second pipeline 410b, the gas introduced into the workpiece 600 by the third pipeline 410c can realize the airtightness detection of the workpiece 600.

[0069] That is to say, the chiller of the present application can realize the cooling of the workpiece 600, and at the same time can dry the residual liquid in the workpiece 600. In addition, it can also realize the airtightness detection of the workpiece 600, and the chiller has multiple functions and uses.

[0070] Refer to Figure 1 and Figure 4 , a buffer tank 500 can also be provided at the position corresponding to the first liquid inlet in the water tank 200. The buffer tank 500 is used to receive the liquid or gas flowing into the water tank 200 from the first liquid inlet.

[0071] It can be understood that in some embodiments, when there is residual liquid in the workpiece 600, gas needs to be introduced through the third pipeline 410c to dry the liquid in the workpiece 600. The gas ejected from the workpiece 600 will spray into the water tank 200 through the second pipeline 410b. At this time, too many bubbles will be generated in the water tank 200, and at the same time, the components in the water tank 200 will also be impacted. Therefore, a buffer tank 500 is provided in the water tank 200 to receive the liquid or gas flowing into the water tank 200 from the first liquid inlet, so that the liquid or gas first acts in the buffer tank 500, which can realize buffering.

[0072] Furthermore, an overflow port 510 is provided on the buffer tank 500, and the overflow port 510 enables the liquid in the buffer tank 500 to flow into the water tank 200.

[0073] It can be understood that after the buffer tank 500 filled with the liquid entering through the first liquid inlet is full, the liquid can flow into the water tank 200 from the overflow port 510.

[0074] Preferably, the overflow port 510 is provided at the top of the buffer tank 500.

[0075] It is understandable that when gas is introduced into the first liquid inlet, bubbles will be generated in the buffer tank 500. At this time, the overflow port 510 provided at the top of the buffer tank 500 is conducive to discharging the bubbles from the buffer tank 500.

[0076] Furthermore, an air outlet (not marked in the figure) may be provided at a position in the water tank 200 away from the first liquid outlet.

[0077] After the bubbles in the buffer tank 500 are discharged into the water tank 200 through the overflow port 510, the gas can be discharged from the water tank 200 through the air outlet. In addition, since the air outlet is located at a position away from the first liquid outlet, bubbles can be prevented from being discharged from the first liquid outlet.

[0078] For example, the air outlet may be provided at the top of the water tank 200. In this way, it is possible to prevent liquid from flowing out of the air outlet, and at the same time ensure that bubbles will not be discharged from the first liquid outlet to the first pipeline 410a and then flow to the workpiece 600.

[0079] Refer to Figure 3 , a first pressure sensor 450a may also be provided between one end of the second pipeline 410b connected to the workpiece 600 and the return water valve 440. The first pressure sensor 450a is used to detect the airtightness of the battery pack.

[0080] An intake air proportional regulating valve 460 may also be provided on the third pipeline 410c. The intake air proportional regulating valve 460 is used to regulate the amount of gas introduced into the workpiece 600 through the third pipeline 410c.

[0081] Refer to Figure 3 , a liquid supply circulation pump 470 may also be provided on the first pipeline 410a on the side close to the water tank 200 at the connection port. The liquid supply circulation pump 470 is conducive to the liquid flowing out of the water tank 200 into the first pipeline 410a, the workpiece 600, and the second pipeline 410b and then returning to the water tank 200 to achieve circulation.

[0082] A flow meter 480 may also be provided on the first pipeline 410a on the side close to the water tank 200 at the connection port. The flow meter 480 can be used to monitor the flow rate of the liquid.

[0083] A second pressure sensor 450b may also be provided on the first pipeline 410a on the side close to the water tank 200 at the connection port. The second pressure sensor 450b can be used for the pressure of the liquid flowing to the workpiece 600.

[0084] A filter 490a may also be provided on the first pipeline 410a. The filter 490a is used to filter the liquid to prevent contamination of the workpiece 600. Among them, the filter 490a can adopt a Y-type filter 490a.

[0085] Refer to Figure 3, a first temperature sensor 490b may also be provided on the second pipeline 410b, and the first temperature sensor 490b is used to detect the temperature of the liquid flowing out of the workpiece 600.

[0086] Preferably, the first temperature sensor 490b may be provided on the side of the return water valve 440 close to the water tank 200. When performing an airtightness test on the workpiece 600, the gas is prevented from acting on the first temperature sensor 490b.

[0087] Refer to Figure 3 , in some embodiments, at least two sets of the external circulation loop 400 are provided. That is, each set of the external circulation loop 400 can be connected to test one workpiece 600.

[0088] Specifically, one first liquid outlet of the water tank 200 is connected to one end of the first pipeline 410a of a set of the external circulation loop 400, and one first liquid inlet of the water tank 200 is connected to one end of the second pipeline 410b of a set of the external circulation loop 400.

[0089] It can be understood that each set of the external circulation loop 400 is respectively connected to the water tank 200 through the first liquid inlet and the first liquid outlet, so the two sets of the external circulation loop 400 can work independently.

[0090] That is, when one set of the external circulation loop 400 cools the workpiece 600, the other set of the external circulation loop 400 can perform an airtightness test on another workpiece 600, or be used to blow dry the residual liquid in the workpiece 600.

[0091] In addition, since in some embodiments, a buffer tank 500 is provided in the water tank 200, when one set of the external circulation loop 400 blows air to the workpiece 600, the gas first enters the buffer tank 500 through the first liquid inlet, and then discharges from the water tank 200 through the overflow port 510 and the air outlet, preventing the liquid from containing bubbles when the other set of the external circulation loop 400 cools the workpiece 600, which affects the cooling and detection accuracy.

[0092] Refer to Figure 4 , a heater 210 may also be provided in the water tank 200, and the heater 210 can be used to heat the liquid in the water tank 200.

[0093] For example, in some embodiments, when the liquid flowing through the workpiece 600 requires a relatively high temperature, the heater 210 can heat the liquid in the water tank 200.

[0094] A second temperature sensor 220 may also be provided in the water tank 200, and the second temperature sensor 220 is used to detect the temperature in the water tank 200 to ensure that the temperature of the liquid flowing into the workpiece 600 meets the requirements.

[0095] A liquid level sensor 230 may also be disposed in the water tank 200, and the liquid level sensor 230 is used to detect the liquid level of the liquid in the water tank 200.

[0096] Refer to Figure 1 , the chiller may further include a cooling device 100 and an internal circulation loop 300.

[0097] Further, refer to Figure 2 , the internal circulation loop 300 includes a fourth pipeline 310a and a fifth pipeline 310b.

[0098] The second liquid outlet of the water tank 200 is connected to the liquid inlet of the cooling device 100 through the fourth pipeline 310a, and the liquid outlet of the cooling device 100 is connected to the second liquid inlet of the water tank 200 through the fifth pipeline 310b.

[0099] The liquid in the water tank 200 flows into the cooling device 100 through the fourth pipeline 310a. After the cooling device 100 cools the liquid, the liquid flows back into the water tank 200 through the fifth pipeline 310b. Among them, the liquid may be water.

[0100] Refer to Figure 2 , a refrigeration circulation pump 320 may also be disposed on the fourth pipeline 310a, and the refrigeration circulation pump 320 is beneficial to enabling the liquid in the internal circulation loop 300 to circulate.

[0101] A flow switch 330 may also be disposed on the fourth pipeline 310a, and the flow switch 330 is used to control the flow rate of the liquid flowing into the cooling device 100, and thus is beneficial to controlling the temperature of the liquid in the water tank 200.

[0102] Refer to Figure 5 , the cooling device 100 may include a condenser 110, a plate heat exchanger 120, a sixth pipeline 130, a seventh pipeline 140, and an eighth pipeline 150. The inlet of the condenser 110 is respectively connected to one ends of the sixth pipeline 130 and the seventh pipeline 140, the outlet of the condenser is connected to one end of the eighth pipeline 150, the other end of the sixth pipeline 130 is connected to the outlet of the plate heat exchanger 120, and the other ends of the seventh pipeline 140 and the eighth pipeline 150 are respectively connected to the inlet of the plate heat exchanger 120.

[0103] The first pipeline is connected to the second inlet of the plate heat exchanger 120, and the second pipeline is connected to the second outlet of the plate heat exchanger 120.

[0104] A bypass valve 160 may also be disposed on the seventh pipeline 140, and an electronic expansion valve 170 may also be disposed on the eighth pipeline 150.

[0105] In some embodiments, the cooling device 100 may adopt a water-cooled method. In other embodiments, the cooling device 100 may adopt an air-cooled method.

[0106] For example, when the cooling device 100 uses water cooling, after the condenser 110 cools the liquid, it flows through the eighth pipeline 150 to the plate heat exchanger 120. At this time, the liquid in the internal circulation loop 300 in the plate heat exchanger 120 exchanges heat with the liquid flowing out of the condenser 110. The liquid of the cooling device 100 flows out of the plate heat exchanger 120 and then flows back to the condenser 110 via the sixth pipeline 130.

[0107] In addition, since a seventh pipeline 140 is provided, a bypass valve 160 is provided on the seventh pipeline 140, and an electronic expansion valve 170 is provided on the eighth pipeline 150. Therefore, by controlling the opening and closing of the bypass valve 160 and the opening and closing of the electronic expansion valve 170, the flow rates of the liquids flowing through the condenser and the seventh pipeline 140 can be controlled. It can be understood that the liquid flowing through the seventh pipeline 140 is not heated through the condenser 110. Therefore, the temperature of the liquid entering the plate heat exchanger 120 can be controlled, and thus the cooling temperature of the liquid in the internal circulation loop 300 can be controlled.

[0108] When the cooling device 100 uses air cooling, the principle is similar to that of liquid cooling, but the medium for temperature conduction is different, which will not be elaborated here.

[0109] Furthermore, a compressor 180 or a refrigeration circulation pump 320 may be provided on the sixth pipeline 130. The compressor 180 or the refrigeration circulation pump 320 is beneficial to the circulation of the liquid or gas in the cooling device 100.

[0110] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A chiller, characterized in that, It includes a water tank and an external circulation loop. The water tank is used to provide cooling liquid; The external circulation loop includes a first pipeline, a second pipeline, and a third pipeline. Among them, One end of the first liquid outlet of the water tank is connected to one end of the first pipeline, and the other end of the first pipeline is used to connect to the liquid inlet of the workpiece. A connection port is also provided on the first pipeline; One end of the first liquid inlet of the water tank is connected to one end of the second pipeline, and the other end of the second pipeline is used to connect to the liquid outlet of the workpiece; One end of the third pipeline is connected to the connection port, and the other end of the third pipeline is used to introduce gas; and A liquid outlet valve is provided on the first pipeline on the side of the connection port close to the water tank; A return water valve is provided on the second pipeline; An air inlet valve is provided on the third pipeline.

2. The chiller according to claim 1, characterized in that, A buffer tank is provided at the position corresponding to the first liquid inlet in the water tank. The buffer tank is used to receive the liquid or gas flowing into the water tank from the first liquid inlet; The buffer tank is provided with an overflow outlet, and the overflow outlet allows the liquid in the buffer tank to flow into the water tank; and The overflow outlet is provided at the top of the buffer tank.

3. The chiller according to claim 2, characterized in that, An air outlet is provided at a position in the water tank far from the first liquid outlet.

4. The chiller according to claim 1, characterized in that, A first pressure sensor is provided between one end of the second pipeline connected to the workpiece and the return water valve; An air intake proportional regulating valve is also provided on the third pipeline.

5. The chiller according to claim 1, characterized in that, A liquid supply circulation pump is provided on the first pipeline on the side of the connection port close to the water tank; A flow meter is provided on the first pipeline on the side of the connection port close to the water tank; A second pressure sensor is provided on the first pipeline on the side of the connection port close to the water tank; and A filter is provided on the first pipeline.

6. The chiller according to claim 4, wherein A first temperature sensor is also provided on the second pipeline; and The first temperature sensor is provided on the side of the return water valve close to the water tank.

7. The chiller according to any one of claims 1 to 6, characterized in that, At least two groups of the external circulation loops are provided; and One first liquid outlet of the water tank is connected to one end of the first pipeline of a group of the external circulation loops, and one first liquid inlet of the water tank is connected to one end of the second pipeline of a group of the external circulation loops.

8. The chiller according to any one of claims 1 to 6, characterized in that, A heater is provided in the water tank; A second temperature sensor is provided in the water tank; and A liquid level sensor is provided in the water tank.

9. The chiller according to any one of claims 1 to 6, characterized in that, It further includes a cooling device and an internal circulation loop; among them, The internal circulation loop includes a fourth pipeline and a fifth pipeline. The second liquid outlet of the water tank is connected to the liquid inlet of the cooling device through the fourth pipeline, and the liquid outlet of the cooling device is connected to the second liquid inlet of the water tank through the fifth pipeline.

10. The chiller according to claim 9, characterized in that, A refrigeration circulation pump is provided on the fourth pipeline; and A flow switch is provided on the fourth pipeline.

11. The chiller according to claim 9, characterized in that, The cooling device includes a condenser, a plate heat exchanger, a sixth pipeline, a seventh pipeline, and an eighth pipeline; among them, The inlet of the condenser is respectively connected to one end of the sixth pipeline and the seventh pipeline. The outlet of the condenser is connected to one end of the eighth pipeline. The other end of the sixth pipeline is connected to the first outlet of the plate heat exchanger. The other ends of the seventh pipeline and the eighth pipeline are respectively connected to the first inlet of the plate heat exchanger; The first pipeline is connected to the second inlet of the plate heat exchanger, and the second pipeline is connected to the second outlet of the plate heat exchanger; and A compressor or a refrigeration circulation pump is provided on the sixth pipeline, a bypass valve is provided on the seventh pipeline, and an electronic expansion valve is provided on the eighth pipeline.

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