Cooling system and water chilling unit

Abstract

The utility model provides a cooling system and a water chilling unit, and the cooling system comprises a cooling pipeline, a condenser, an evaporator, a heat exchanger, a heat exchanger and a heat exchanger, the heat exchanger is arranged on the cooling pipeline, and the cooling pipeline is used for cooling the heating component; the throttling devices are arranged on the cooling pipeline and comprise the first throttling device and the second throttling device, the first throttling device is located in front of the heat exchanger, the second throttling device is located behind the heat exchanger, and the opening degree of the first throttling device and the opening degree of the second throttling device are adjustable. The cooling system provided by the utility model solves the technical problem that the existing frequency converter cooling system in the prior art is difficult to adapt to the environment with large working condition change.

Description

TECHNICAL FIELD

[0001] The utility model relates to cooling structure technical field, concretely relates to a cooling system and water chiller unit. BACKGROUND

[0002] As one of the most critical technologies in the refrigeration field, the variable frequency compressor is more and more used in the large cooling capacity and high power water chiller unit product due to its advantages of high efficiency, wide adjustment range, small starting current and the like. The frequency converter is the core component for realizing the variable frequency operation of the compressor of the water chiller unit, and a large amount of heat is generated in the operation process, so that the frequency converter needs to be cooled.

[0003] The simple air cooling cannot meet the cooling requirements of the frequency converter of the large water chiller unit, and the water cooling or the direct use of the refrigerant cooling of the water chiller unit is generally used in the market. The water cooling is relatively simple, and the risk is very large once the leakage occurs; the refrigerant cooling must control the heat absorbed by the refrigerant, and when the working condition changes continuously, if the cooling effect is too strong, the condensation in the frequency converter is easily caused, and the safety hazard is brought; if the cooling effect is insufficient, the temperature in the frequency converter is easily too high or even burned out.

[0004] For the frequency converter cooled by the refrigerant, the conventional system configuration is that an electronic expansion valve is connected in series on the refrigerant inlet pipe, so that the throttling and flow regulation functions are realized. Since the throttling temperature depends on the refrigerant return pressure of the frequency converter, when the chilled water temperature changes, the throttling temperature is also low when the return pressure is low, so that the condensation in the frequency converter is easily caused. In addition, the method of only controlling the flow of the refrigerant can be used, and the refrigerant is not throttled, but under the conditions deviating from the design working condition, such as the high cooling water temperature in summer or the failure of the cooling tower, the cooling may be insufficient.

[0005] Therefore, the prior art needs to be further developed. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the above technical defects, and provides a cooling system and water chiller unit, so as to solve the technical problem that the existing frequency converter cooling system in the related art is difficult to adapt to the environment with large working condition change.

[0007] In order to achieve the above technical purpose, the utility model adopts the following technical scheme: a cooling system is provided, which comprises: a cooling pipeline, the inlet of the cooling pipeline is communicated with a condenser, and the outlet of the cooling pipeline is communicated with an evaporator; a heat exchanger, the heat exchanger is arranged on the cooling pipeline, and the cooling pipeline is used for cooling a heating component; a throttling device, the throttling device is arranged on the cooling pipeline, wherein the throttling device comprises a first throttling device and a second throttling device, the first throttling device is located before the heat exchanger, the second throttling device is located after the heat exchanger, and the opening degrees of the first throttling device and the second throttling device are adjustably arranged.

[0008] Further, the cooling system comprises: a first refrigerant supplement pipeline, the first refrigerant supplement pipeline being arranged in parallel with the first throttling device; and / or a second refrigerant supplement pipeline, the second refrigerant supplement pipeline being arranged in parallel with the second throttling device.

[0009] Further, the cooling system comprises: a first control switch, the first control switch being arranged on the first refrigerant supplement pipeline, the first control switch being used for controlling the on-off of the first refrigerant supplement pipeline; and / or a second control switch, the second control switch being arranged on the second refrigerant supplement pipeline, the second control switch being used for controlling the on-off of the second refrigerant supplement pipeline.

[0010] Further, the cooling system comprises: a first control switch, the first control switch being arranged on the first refrigerant supplement pipeline, the first control switch being used for controlling the on-off of the first refrigerant supplement pipeline; and / or a second control switch, the second control switch being arranged on the second refrigerant supplement pipeline, the second control switch being used for controlling the on-off of the second refrigerant supplement pipeline.

[0011] Further, the cooling system further comprises a temperature sensor, the temperature sensor being used for detecting the internal temperature of the heat-generating component, the temperature sensor being signal-connected with the first throttling device, the second throttling device, and the first control switch and the second control switch respectively.

[0012] Further, the first control switch and the second control switch are respectively one or more combinations of: a solenoid valve, a ball valve, and a stop valve.

[0013] Further, the first throttling device and the second throttling device both comprise an electronic expansion valve.

[0014] Further, the heat exchanger comprises a heat exchange coil arranged in the interior of the heat-generating component, the heat exchange coil being used for circulating the refrigerant.

[0015] Further, the cooling system further comprises a compressor, two ends of the compressor being respectively communicated with the condenser and the evaporator.

[0016] Further, the cooling system comprises a third throttling device, one end of the third throttling device being connected with the refrigerant outlet of the condenser, and the other end of the third throttling device being connected with the refrigerant inlet of the evaporator.

[0017] A water chiller, the water chiller comprising the above cooling system.

[0018] Advantages:

[0019] 1. By the above setting, by adjusting the opening degree of the first throttling device and the second throttling device, the temperature and flow of the refrigerant entering the heat exchanger are controlled, the first throttling device and the second throttling device can be adjusted respectively or simultaneously according to different working conditions, so that the cooling of the heat generating component can be quickly completed under different working condition changes, by adjusting the refrigerant pressure and the refrigerant temperature in the cooling pipeline through the first throttling device and the second throttling device, the temperature of the heat generating component is reasonably controlled, so that the technical problem that the existing frequency converter cooling system in the related art is difficult to adapt to the environment with large working condition changes is solved.

[0020] 2. By arranging the temperature sensor, the internal temperature of the heat generating component is monitored, and the first throttling device and the second throttling device, and the first control switch and the second control switch are fed back and controlled, and the cooling strategy is adjusted in time, so that the flow and temperature of the refrigerant are automatically adjusted to maintain the temperature of the heat generating component stable.

[0021] 3. The cooling system of the embodiment is applied to the frequency converter, electronic expansion valves are arranged at the inlet and outlet of the cooling pipeline of the frequency converter as the first throttling device and the second throttling device, and the first control switch and the second control switch are connected in parallel. By monitoring the operating parameters of the unit and the temperature in the frequency converter, the opening degree of the first throttling device and the second throttling device and the opening and closing of the first control switch and the second control switch are controlled by the control logic to control the temperature and flow of the refrigerant entering the frequency converter, the temperature in the frequency converter cabinet is reasonably controlled, the over-temperature of the frequency converter caused by insufficient cooling or the condensation of the frequency converter caused by excessive cooling is effectively prevented, and the stable operation of the frequency converter can be ensured in a complex environment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the cooling system adopted by the embodiment of the utility model.

[0023] Among them, the above drawing includes the following sign:

[0024] 10, heat generating component;

[0025] 1, cooling pipeline; 2, condenser; 3, evaporator; 4, heat exchanger; 51, first throttling device; 52, second throttling device; 61, first refrigerant supplement pipeline; 62, second refrigerant supplement pipeline; 71, first control switch; 72, second control switch; 8, compressor; 9, third throttling device. DETAILED DESCRIPTION

[0026] In order to enable personnel in the technical field to better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should fall within the scope of protection of the present application.

[0027] Embodiment 1

[0028] According to the embodiment of the present application, a cooling system is provided, please refer to Figure 1 , comprising: a cooling pipeline 1, the inlet of the cooling pipeline 1 is communicated with a condenser 2, and the outlet of the cooling pipeline 1 is communicated with an evaporator 3; a heat exchanger 4, the heat exchanger 4 is arranged on the cooling pipeline 1, and the cooling pipeline 1 is used for cooling a heating component 10; a throttling device, the throttling device is arranged on the cooling pipeline 1, wherein the throttling device comprises a first throttling device 51 and a second throttling device 52, the first throttling device 51 is located before the heat exchanger 4, the second throttling device 52 is located after the heat exchanger 4, and the opening degrees of the first throttling device 51 and the second throttling device 52 are adjustably arranged.

[0029] Specifically, the inlet of the cooling pipeline 1 is communicated with the condenser 2 to obtain high-pressure refrigerant liquid, and the outlet of the cooling pipeline 1 is communicated with the evaporator 3 to increase the pressure difference between the inlet and the outlet, so that the refrigerant has sufficient power to flow.

[0030] It should be noted that the cooling pipeline 1 takes high-pressure refrigerant liquid from the condenser side (high-pressure side), throttles the refrigerant through the first throttling device 51 to reduce the temperature of the refrigerant, evaporates and absorbs heat in the heat exchanger 4 in the heating component 10 through the cooling pipeline 1, and then returns to the evaporator side (low-pressure side) through the outlet of the cooling pipeline 1. For the refrigerant in a saturated state, the pressure and the temperature are one-to-one corresponding, and the higher the pressure, the higher the temperature. If the pressure of the low-pressure side is increased, or the second throttling device 52 is closed to cause the outlet pressure of the cooling system to be increased, the pressure and temperature of the refrigerant throttled by the first throttling device 51 are increased, and the cooling capacity of the refrigerant is correspondingly reduced. Therefore, adjusting the first throttling device 51 can throttle the refrigerant and adjust the refrigerant flow, directly adjusting the cooling capacity of the refrigerant; adjusting the second throttling device 52 can adjust the outlet pressure of the refrigerant, thereby adjusting the temperature of the refrigerant throttled by the first throttling device 51, and further adjusting the cooling capacity of the refrigerant.

[0031] Through the above setting, by adjusting the opening degree of the first throttling device 51 and the second throttling device 52, the temperature and flow of the refrigerant entering the heat exchanger 4 are controlled, the first throttling device 51 and the second throttling device 52 can be adjusted respectively or simultaneously according to different working conditions, so that the cooling of the heat generating component 10 can be completed faster under different working condition changes, and through the common adjustment of the first throttling device 51 and the second throttling device 52 on the refrigerant pressure and the refrigerant temperature in the cooling pipeline 1, the temperature of the heat generating component 10 is reasonably controlled, so as to solve the technical problem that the existing frequency converter cooling system in the related art is difficult to adapt to the environment with large working condition changes.

[0032] In the cooling system of the embodiment, referring to Figure 1 , the cooling system comprises a first refrigerant supplement pipeline 61, the first refrigerant supplement pipeline 61 is arranged in parallel with the first throttling device 51; and a second refrigerant supplement pipeline 62, the second refrigerant supplement pipeline 62 is arranged in parallel with the second throttling device 52. Through the arrangement of the first refrigerant supplement pipeline 61 and the second refrigerant supplement pipeline 62, when the heat generating component 10 generates a large amount of heat, the first refrigerant supplement pipeline 61 and the second refrigerant supplement pipeline 62 can be used to supplement the flow of the heat exchanger 4, further increase the flow of the refrigerant in the heat exchanger 4, and enhance the cooling effect.

[0033] In the cooling system of the embodiment, referring to Figure 1 , the cooling system comprises a first control switch 71, the first control switch 71 is arranged on the first refrigerant supplement pipeline 61, and the first control switch 71 is used to control the on-off of the first refrigerant supplement pipeline 61; and a second control switch 72, the second control switch 72 is arranged on the second refrigerant supplement pipeline 62, and the second control switch 72 is used to control the on-off of the second refrigerant supplement pipeline 62. Through the above arrangement, the first control switch 71 and the second control switch 72 are used to control the on-off of the first refrigerant supplement pipeline 61 and the second refrigerant supplement pipeline 62.

[0034] In the cooling system of the embodiment, referring to Figure 1 , the cooling system further comprises a temperature sensor, the temperature sensor is used to detect the internal temperature of the heat generating component 10, and the temperature sensor is signal connected with the first throttling device 51 and the second throttling device 52, and the first control switch 71 and the second control switch 72. Through the arrangement of the temperature sensor, the internal temperature of the heat generating component 10 is monitored, and the first throttling device 51 and the second throttling device 52, and the first control switch 71 and the second control switch 72 are feedback controlled, the cooling strategy is adjusted in time, so as to automatically adjust the flow and temperature of the refrigerant, and maintain the temperature of the heat generating component 10 stable.

[0035] In the cooling system of the embodiment, referring to Figure 1The first control switch 71 and the second control switch 72 are respectively one or a combination of the following: solenoid valve, ball valve, and stop valve.

[0036] Preferably, the first control switch 71 and the second control switch 72 are solenoid valves, which can be automatically opened and closed according to control signals.

[0037] In the cooling system of the present embodiment, referring to Figure 1 The first throttling device 51 and the second throttling device 52 are both electronic expansion valves.

[0038] Through the above arrangement, the first throttling device 51 and the second throttling device 52 are electronic expansion valves, which can controllably throttle and adjust the flow of the refrigerant passing through the first throttling device 51 and the second throttling device 52.

[0039] In the cooling system of the present embodiment, referring to Figure 1 The heat exchanger 4 includes a heat exchange coil arranged inside the heat generating component 10, and the heat exchange coil is used for the refrigerant to flow through. Through the above arrangement, the heat exchange coil is arranged inside the heat generating component 10, and the refrigerant flows through the heat exchange coil and takes away the heat in the heat generating component 10 by evaporation and heat absorption.

[0040] In some embodiments, when the heat generating component 10 is a frequency converter, the frequency converter includes a shell, and the heat exchange coil is located inside the shell.

[0041] In the cooling system of the present embodiment, referring to Figure 1 The cooling system further includes a compressor 8, and two ends of the compressor 8 are respectively connected to the condenser 2 and the evaporator 3.

[0042] In the cooling system of the present embodiment, referring to Figure 1 The cooling system includes a third throttling device 9, one end of the third throttling device 9 is connected to the refrigerant outlet of the condenser 2, and the other end of the third throttling device 9 is connected to the refrigerant inlet of the evaporator 3.

[0043] Specifically, in the present embodiment, the main path of the refrigerant circulation is: the high-temperature and high-pressure refrigerant gas discharged from the compressor 8 is condensed and liquefied in the condenser 2, then cooled and decompressed by the third throttling device 9, and finally evaporated and vaporized by the relatively high-temperature chilled water in the evaporator 3, and re-enters the compressor 8 for compression.

[0044] In some embodiments, the control principle of the cooling system is that a reasonable temperature range is set for the heat temperature of the heat generating component 10. When the heat temperature is within the reasonable range, the first control switch 71 and the second control switch 72 are always off, the second throttling device 52 is maintained in the full open state, the first throttling device 51 is adjusted to control the refrigerant flow into the heat generating component 10, and the temperature in the heat generating component 10 is controlled. If the heat generating component 10 has a small heat generating amount, the first throttling device 51 is closed to the minimum opening degree, and the temperature in the heat generating component 10 is still lower than the reasonable temperature range and continues to decrease, then the second throttling device 52 is closed to increase the temperature of the refrigerant entering the heat generating component 10 and reduce the cooling amount. If the heat generating component 10 has a large heat generating amount, the first throttling device 51 and the second throttling device 52 are both opened to the maximum, and the temperature of the heat generating component 10 continues to rise, then the first control switch 71 and the second control switch 72 are opened at the same time to increase the refrigerant flow and enhance the cooling effect.

[0045] In some embodiments, the specific control method of the cooling system is as follows:

[0046] 1. First, set the normal temperature range (T1, T2), and set the minimum opening degrees D1 and D2 and the initial opening degrees D3 and D4 for the first throttling device 51 and the second throttling device 52.

[0047] 2. At startup, the first throttling device 51 and the second throttling device 52 are maintained at the maximum opening degree, and the first control switch 71 and the second control switch 72 are opened to ensure that the cooling amount of the heat generating component 10 is sufficient when the high-low pressure difference has not been established during the startup process. After the startup process is completed, the first throttling device 51 and the second throttling device 52 are opened to the initial opening degrees D3 and D4, and the first control switch 71 and the second control switch 72 are closed.

[0048] 3. During normal operation, the first control switch 71 and the second control switch 72 are always closed, and are opened at the same time when the opening condition is met.

[0049] The temperature T in the heat generating component 10 is monitored by a temperature sensor in the heat generating component 10.

[0050] ① When T ∈ (T1, T2), the opening degrees of the first throttling device 51 and the second throttling device 52 are maintained.

[0051] ② When T < T1, the first throttling device 51 is gradually closed (the number of steps of closing can be varied) until the temperature T returns to the normal temperature range or reaches the minimum opening degree D1 of the first throttling device 51; when the opening degree of the first throttling device 51 is D1 and the temperature T in the frequency converter is still less than T1, the second throttling device 52 is gradually closed (the number of steps of closing can be varied) until the temperature T returns to the normal temperature range.

[0052] ③ When T > T2, gradually open the first throttling device 51 (the number of steps can be changed) until the temperature T returns to the normal temperature range or reaches the maximum opening of the first throttling device 51; when the first throttling device 51 and the second throttling device 52 have been opened to the maximum, and the temperature T in the frequency converter is still greater than T2, open the first control switch 71 and the second control switch 72 until the temperature T returns to the normal temperature range, and then close the first control switch 71 and the second control switch 72.

[0053] Embodiment 2

[0054] A water chiller, the water chiller comprising the cooling system.

[0055] The cooling system in this embodiment is applied to a water chiller. Through the above settings, by monitoring the operating parameters of the water chiller and the temperature in the heat generating component 10, the control logic makes a judgment, adjusts the opening of the first throttling device 51 and the second throttling device 52, and controls the opening and closing of the first control switch 71 and the second control switch 72, controls the temperature and flow of the refrigerant entering the heat exchanger 4, and adjusts the refrigerant pressure and refrigerant temperature in the cooling pipeline 1 through the first throttling device 51 and the second throttling device 52, to realize reasonable control of the temperature in the heat generating component 10. When the cooling system is applied to a frequency converter, it effectively prevents the frequency converter from overheating due to insufficient cooling or condensation of the frequency converter due to excessive cooling, and ensures the stable operation of the frequency converter in complex environments, thereby solving the technical problem that the existing frequency converter cooling system in the related art is difficult to adapt to environments with large changes in working conditions.

[0056] Embodiment 3

[0057] On the basis of any one of the embodiments 1-2, a feasible specific embodiment of applying the cooling system to a frequency converter is further proposed:

[0058] As shown in Figure 1 The system is based on a water chiller and includes a compressor 8, a condenser 2, an evaporator 3, a third throttling device 9, a first control switch 71 and a second control switch 72, a first throttling device 51 and a second throttling device 52, and a frequency converter.

[0059] In the refrigeration system of the water chiller in this embodiment, the main path of the refrigerant circulation is: the high-temperature and high-pressure refrigerant gas discharged from the compressor 8 is condensed and liquefied in the condenser 2, then is cooled and decompressed by the third throttling device 9, and finally is evaporated and vaporized in the evaporator 3 by the relatively high-temperature chilled water, and is re-compressed into the compressor 8.

[0060] The cooling pipeline 1 is mainly composed of an inlet pipeline and an outlet pipeline. The inlet pipeline is connected with the bottom of the condenser 2 to obtain high-pressure refrigerant liquid. The outlet pipeline is connected with the evaporator 3 to increase the pressure difference between the inlet and the outlet, so that the refrigerant has sufficient power to flow. The frequency converter is provided with a heat exchange coil. The refrigerant flows in the heat exchange coil and takes away the heat in the frequency converter through evaporation and heat absorption. The frequency converter is also provided with a temperature sensor to monitor the temperature in the frequency converter and feedback control the first throttling device 51 and the second throttling device 52 and other components to maintain stable temperature.

[0061] The cooling principle of the cooling system is as follows: high-pressure refrigerant liquid is taken from the condenser 2 side (high-pressure side), throttled by the first throttling device 51 to reduce the temperature of the refrigerant, evaporated and heat-absorbed in the heat exchanger 4 in the frequency converter, and then returned to the evaporator 3 side (low-pressure side) through the outlet pipeline. For the saturated refrigerant, the pressure and the temperature are one-to-one corresponding. The higher the pressure is, the higher the temperature is. If the pressure of the low-pressure side rises or the second throttling device 52 is closed to cause the outlet pressure of the frequency converter cooling system to rise, the pressure and temperature of the refrigerant throttled by the first throttling device 51 rise, and the cooling capacity of the refrigerant decreases accordingly. Therefore, adjusting the first throttling device 51 can throttle the refrigerant and adjust the refrigerant flow, directly adjusting the cooling capacity of the refrigerant; adjusting the second throttling device 52 can adjust the outlet pressure of the refrigerant, thereby adjusting the temperature of the refrigerant throttled by the first throttling device 51, and further adjusting the cooling capacity of the refrigerant.

[0062] The control principle of the cooling system is as follows: a reasonable temperature range is set for the frequency converter. Under normal circumstances, the first control switch 71 and the second control switch 72 are always off, the second throttling device 52 is in full open state, the first throttling device 51 is adjusted to control the refrigerant flow into the frequency converter, and the temperature in the frequency converter is controlled. If the heat generation of the frequency converter is small, the first throttling device 51 is closed to the minimum opening degree, the temperature in the frequency converter is still lower than the reasonable temperature range and continues to decrease, the second throttling device 52 is closed, the temperature of the refrigerant entering the frequency converter is increased, and the cooling capacity is reduced. If the heat generation of the frequency converter is large, the first throttling device 51 and the second throttling device 52 are both opened to the maximum, and the temperature of the frequency converter continues to rise, the first control switch 71 and the second control switch 72 are opened at the same time, the refrigerant flow is increased, and the cooling effect is enhanced.

[0063] The specific control method of the cooling system is as follows:

[0064] The frequency converter sets a normal temperature range (T1, T2), and the first throttling device 51 and the second throttling device 52 are both set to the minimum opening degree D1, D2 and the initial opening degree D3, D4.

[0065] Start-up process control: the first throttling device 51 and the second throttling device 52 keep maximum opening, the first control switch 71 and the second control switch 72 are opened to ensure that the cooling amount of the frequency converter is sufficient when the high-low pressure difference has not been established during the start-up process. After the start-up process is completed, the first throttling device 51 and the second throttling device 52 are opened to the initial opening D3 and D4, and the first control switch 71 and the second control switch 72 are closed.

[0066] Normal operation control:

[0067] During normal operation, the first control switch 71 and the second control switch 72 remain normally closed and are opened at the same time when the opening condition is met.

[0068] The temperature T in the frequency converter is monitored by a temperature sensor in the frequency converter:

[0069] ① When T∈(T1, T2), the opening of the first throttling device 51 and the second throttling device 52 is kept;

[0070] ② When T<T1 (the temperature is relatively low), the first throttling device 51 is gradually closed (the number of steps of closing can be varied) until the temperature T returns to the normal temperature range or reaches the minimum opening D1 of the first throttling device 51; when the opening of the first throttling device 51 is D1 and the temperature T in the frequency converter is still less than T1, the second throttling device 52 is gradually closed (the number of steps of closing can be varied) until the temperature T returns to the normal temperature range.

[0071] ③ When T>T2 (the temperature is relatively high), the first throttling device 51 is gradually opened (the number of steps of opening can be varied) until the temperature T returns to the normal temperature range or reaches the maximum opening of the first throttling device 51; when the first throttling device 51 and the second throttling device 52 have both been opened to the maximum, and the temperature T in the frequency converter is still greater than T2, the first control switch 71 and the second control switch 72 are opened until the temperature T returns to the normal temperature range, and then the first control switch 71 and the second control switch 72 are closed.

[0072] The cooling system of the present embodiment is applied to the frequency converter, electronic expansion valves are arranged as the first throttling device 51 and the second throttling device 52 at the inlet and outlet of the cooling pipeline of the frequency converter, and the first control switch 71 and the second control switch 72 are connected in parallel. By monitoring the operating parameters of the unit and the temperature in the frequency converter, the opening of the first throttling device 51 and the second throttling device 52 and the opening and closing of the first control switch 71 and the second control switch 72 are controlled by the control logic to control the temperature and flow of the refrigerant entering the frequency converter, so as to realize reasonable control of the temperature in the frequency converter cabinet, effectively prevent the frequency converter from overheating due to insufficient cooling or condensation of the frequency converter due to excessive cooling, and ensure stable operation of the frequency converter in complex environments.

[0073] It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the use of these terms is interchangeable under appropriate circumstances such that the descriptive

[0074] Optionally, the specific examples in the embodiments can refer to the examples described in the above embodiments, and the embodiments will not be described here again.

[0075] The sequence numbers of the above-described embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments.

[0076] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0077] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A cooling system, characterized by, The cooling system comprises: a cooling pipeline (1), an inlet of the cooling pipeline (1) being communicated with a condenser (2), and an outlet of the cooling pipeline (1) being communicated with an evaporator (3); a heat exchanger (4) arranged on the cooling pipeline (1), the cooling pipeline (1) being used for cooling a heat generating component (10); a throttling device arranged on the cooling pipeline (1), wherein the throttling device comprises a first throttling device (51) and a second throttling device (52), the first throttling device (51) being arranged before the heat exchanger (4), the second throttling device (52) being arranged after the heat exchanger (4), and the opening degrees of the first throttling device (51) and the second throttling device (52) being adjustably arranged.

2. The cooling system of claim 1, wherein, The cooling system comprises: a first refrigerant supplement pipeline (61) arranged in parallel with the first throttling device (51); and / or a second refrigerant supplement pipeline (62) arranged in parallel with the second throttling device (52).

3. The cooling system of claim 2, wherein, The cooling system comprises: a first control switch (71) arranged on the first refrigerant supplement pipeline (61), the first control switch (71) being used for controlling the on-off of the first refrigerant supplement pipeline (61); and / or a second control switch (72) arranged on the second refrigerant supplement pipeline (62), the second control switch (72) being used for controlling the on-off of the second refrigerant supplement pipeline (62).

4. The cooling system of claim 3, wherein, The cooling system further comprises a temperature sensor used for detecting the internal temperature of the heat generating component (10), the temperature sensor being signal connected with the first throttling device (51), the second throttling device (52), and the first control switch (71) and the second control switch (72) respectively.

5. The cooling system of claim 3, wherein, The first control switch (71) and the second control switch (72) are respectively one or more of the following combinations: solenoid valve, ball valve, stop valve.

6. The cooling system of claim 1, wherein, The first throttling device (51) and the second throttling device (52) both comprise electronic expansion valves.

7. The cooling system of claim 1, wherein, The heat exchanger (4) comprises a heat exchange coil arranged in the interior of the heat generating component (10), the heat exchange coil being used for circulating refrigerant.

8. The cooling system of claim 1, wherein, The cooling system further comprises a compressor (8), two ends of the compressor (8) being communicated with the condenser (2) and the evaporator (3) respectively.

9. The cooling system of claim 1, wherein, The cooling system comprises a third throttling device (9), one end of the third throttling device (9) being connected with a refrigerant outlet of the condenser (2), and the other end of the third throttling device (9) being connected with a refrigerant inlet of the evaporator (3).

10. A water chiller, characterized by, The water chiller comprises the cooling system according to any one of claims 1 to 9.

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