Refrigeration system

Abstract

The invention discloses a refrigerating system. The refrigerating system comprises an evaporator, a condenser, a liquid pump and a compressor. The liquid pump is arranged between the evaporator and the condenser and used for driving the refrigerant to circulate between the evaporator and the condenser. And the compressor is arranged between the evaporator and the condenser and used for driving the refrigerant to circulate between the evaporator and the condenser. The refrigeration system has a first refrigeration mode and a second refrigeration mode. In the first refrigeration mode, the liquid pump works to drive a refrigerant to flow between the evaporator and the condenser in a liquid form so as to achieve phase-change-free refrigeration. And in the second refrigeration mode, the compressor works to drive the refrigerant to flow into the evaporator from the condenser in a liquid form and to be converted into gas so as to realize phase change refrigeration. The refrigerating system can be switched between a phase-change-free refrigerating mode and a phase-change refrigerating mode, so that the refrigerating system is more energy-saving.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a refrigeration system. Background Art

[0002] At present, with the development of the information industry, the number of high-efficiency communication rooms has increased dramatically. Since the machines in the communication room will generate a lot of heat when working, in order to maintain the normal operation of the machines in the room, large-scale water-cooled refrigeration equipment is needed to ensure the ambient temperature inside the room, and it needs to be refrigerated all year round. The traditional water-cooled refrigeration unit mainly uses a compression refrigeration cycle system, including four processes such as compression, condensation, throttling, and evaporation. The principle is as follows: the compressor applies energy to the refrigerant vapor, and the high-temperature and high-pressure refrigerant vapor discharged by the compressor releases heat in the condenser through the relatively low-temperature cooling water in the copper tube, and the temperature drops. At the same time, it condenses into liquid at saturated pressure. The high-temperature and high-pressure refrigerant liquid from the bottom of the condenser is decompressed and expanded when it flows through the throttling device, and the pressure and temperature are reduced, becoming a low-pressure and low-temperature refrigerant liquid and entering the evaporator. The compressor continuously extracts refrigerant vapor from the evaporator. Since the compressor extracts refrigerant, the pressure of the evaporator is reduced, causing the remaining refrigerant in the evaporator to boil and evaporate at a relatively low temperature. The refrigerant gasifies and absorbs the heat of the circulating water in the heat transfer tube to cool it down, obtaining the cold water required for air conditioning or industrial processing. The entire refrigeration process consumes a lot of electrical power to compress the refrigerant, the system consumes a lot of energy in operation, and the seasonal energy efficiency ratio is low.

[0003] It should be noted that the statements in this background technology section only provide background technology related to the present application and do not necessarily constitute prior art. Summary of the invention

[0004] The present application provides a refrigeration system to make the refrigeration system more energy-efficient.

[0005] The present application provides a refrigeration system, comprising:

[0006] Evaporator;

[0007] Condenser;

[0008] A liquid pump, disposed between the evaporator and the condenser, for driving the refrigerant to circulate between the evaporator and the condenser; and

[0009] The compressor is installed between the evaporator and the condenser to drive the refrigerant to circulate between the evaporator and the condenser.

[0010] Among them, the refrigeration system has a first refrigeration mode and a second refrigeration mode. In the first refrigeration mode, the liquid pump works to drive the refrigerant to flow between the evaporator and the condenser in the form of liquid to achieve phase-change refrigeration. In the second refrigeration mode, the compressor works to drive the refrigerant to flow from the condenser to the evaporator in the form of liquid and transform into gas to achieve phase change refrigeration.

[0011] In some embodiments, when the outside temperature is lower than a set value, the refrigeration system enters a first refrigeration mode, and when the outside temperature is higher than the set value, the refrigeration system enters a second refrigeration mode.

[0012] In some embodiments, the evaporator includes a gas outlet arranged at the top of the evaporator and a liquid outlet arranged at the bottom of the evaporator, the gas outlet is connected to the compressor, and the liquid outlet is connected to the liquid pump. In a first refrigeration mode, the refrigerant in liquid form enters the evaporator from the condenser and flows to the liquid pump through the liquid outlet. In a second refrigeration mode, the refrigerant in liquid form enters the evaporator from the condenser and becomes gas and flows to the compressor through the gas outlet.

[0013] In some embodiments, a first heat exchange tube for a first coolant to flow is provided inside the evaporator, and the refrigerant exchanges heat with the first coolant through the first heat exchange tube in the evaporator to reduce the temperature of the first coolant, and the first coolant is used to cool the computer room; a second heat exchange tube for a second coolant to flow is provided inside the condenser, and the refrigerant exchanges heat with the second coolant through the second heat exchange tube in the condenser to reduce the temperature of the refrigerant, and the second coolant is configured to exchange heat with an external natural cold source.

[0014] In some embodiments, the condenser includes an inlet arranged at the top of the condenser, and the refrigeration system also includes a condensation flow equalization device, which includes a condensation porous bottom plate and a condensation side plate arranged at the edge of the condensation porous bottom plate. The condensation flow equalization device is arranged in the top area inside the condenser, and the condensation porous bottom plate, the condensation side plate and the inner wall of the condenser are combined to form a condensation flow equalization cavity. The second heat exchange tube is arranged on the lower side of the condensation flow equalization device, so that the refrigerant discharged from the evaporator enters the condensation flow equalization cavity through the inlet of the condenser and then passes through the condensation porous bottom plate to exchange heat with the second heat exchange tube.

[0015] In some embodiments, the evaporator includes a first liquid inlet and a liquid outlet respectively arranged at both ends of the bottom of the evaporator, the liquid outlet is connected to the inlet of the liquid pump, and the outlet of the liquid pump is connected to the inlet of the condenser. The refrigeration system also includes a baffle device arranged in the evaporator, the baffle device is arranged in the bottom area of ​​the evaporator, the baffle device includes a plurality of baffles arranged alternately in high and low directions, the plurality of baffles are arranged at intervals between the first liquid inlet and the liquid outlet, the first heat exchange tube is inserted in series between the plurality of baffles along the arrangement direction of the plurality of baffles, and in the first refrigeration mode, the refrigerant enters the evaporator from the first liquid inlet and flows to the inlet of the condenser through the liquid outlet after being baffled between the plurality of baffles.

[0016] In some embodiments, the plurality of baffles include a plurality of upper baffles and a plurality of lower baffles that are alternately arranged, the upper baffles are higher than the lower baffles, and the upper baffles partially overlap with the lower baffles in the height direction.

[0017] In some embodiments, the deflection device also includes an upper connecting rod and a lower connecting rod arranged in the evaporator, the upper connecting rod and the lower connecting rod both extend along the arrangement direction, and both ends of the upper connecting rod and the lower connecting rod are connected to the inner wall of the evaporator, a plurality of upper deflector plates are arranged on the upper connecting rod, a plurality of lower deflector plates are arranged on the lower connecting rod, and the upper connecting rod is higher than the lower deflector plate, and the lower connecting rod is lower than the upper deflector plate.

[0018] In some embodiments, in the arrangement direction, the baffles at both ends of the plurality of baffles are configured as lower baffles, and the baffles adjacent to the lower baffles are configured as upper baffles.

[0019] In some embodiments, the baffles at both ends of the plurality of baffles are adjacent to the first liquid inlet and the liquid outlet, respectively.

[0020] In some embodiments, the refrigeration system also includes an evaporation flow equalization device, which includes an evaporation porous bottom plate and an evaporation side plate arranged on the edge of the evaporation porous bottom plate. The evaporation flow equalization device is buckled in the bottom area of ​​the evaporator so that the evaporation porous bottom plate, the evaporation side plate and the inner wall of the evaporator are enclosed to form an evaporation flow equalization cavity. The first heat exchange tube is arranged on the upper side of the evaporation flow equalization device. The evaporator also includes a second liquid inlet arranged at the bottom of the evaporator and a gas outlet arranged at the top of the evaporator. The second liquid inlet is connected to the outlet at the bottom of the condenser, the gas outlet is connected to the inlet of the compressor, and the outlet of the compressor is connected to the inlet of the condenser. In the second refrigeration mode, the compressor allows the refrigerant to enter the evaporation flow equalization cavity from the condenser through the second liquid inlet and pass through the evaporation porous bottom plate to exchange heat with the first heat exchange tube, and then flow to the inlet of the condenser through the gas outlet.

[0021] In some embodiments, the evaporator includes a first liquid inlet and a liquid outlet spaced apart at the bottom of the evaporator, the liquid outlet is connected to the inlet of a liquid pump, and the outlet of the liquid pump is connected to the inlet of a condenser, the refrigeration system also includes a plurality of baffles, the plurality of baffles are spaced apart and arranged between the first liquid inlet and the liquid outlet, in a first refrigeration mode, the refrigerant is baffled between the plurality of baffles in the process of flowing from the first liquid inlet to the liquid outlet, the evaporation flow equalizing device is disposed at the bottom of the plurality of baffles, the evaporation side plate includes two side sealing plates located at both ends of the evaporation porous bottom plate in the length direction of the evaporation porous bottom plate, the two side sealing plates are respectively connected to the baffles at both ends of the plurality of baffles.

[0022] Based on the technical solution provided in the present application, a refrigeration system includes an evaporator, a condenser, a liquid pump and a compressor. The liquid pump is arranged between the evaporator and the condenser, and is used to drive the refrigerant to circulate between the evaporator and the condenser. The compressor is arranged between the evaporator and the condenser, and is used to drive the refrigerant to circulate between the evaporator and the condenser. The refrigeration system has a first refrigeration mode and a second refrigeration mode. In the first refrigeration mode, the liquid pump works to drive the refrigerant to flow between the evaporator and the condenser in the form of a liquid to achieve phase-change refrigeration. In the second refrigeration mode, the compressor works to drive the refrigerant to flow from the condenser into the evaporator in the form of a liquid and transform into a gas to achieve phase-change refrigeration. The refrigeration system can be switched between a phase-change refrigeration mode (i.e., the first refrigeration mode) and a phase-change refrigeration mode (i.e., the second refrigeration mode) to make the refrigeration system more energy-efficient.

[0023] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 This is an overall schematic diagram of a refrigeration system according to some embodiments of the present application.

[0026] Figure 2 This is a schematic diagram of an evaporator according to some embodiments of the present application.

[0027] Figure 3 It is a cross-sectional schematic diagram of the baffle device in the evaporator of some embodiments of the present application.

[0028] Figure 4 This is a schematic diagram of the alternating arrangement of upper baffles and lower baffles in the baffle device of some embodiments of the present application.

[0029] Figure 5It is a three-dimensional schematic diagram of the baffle device in the evaporator of some embodiments of the present application.

[0030] Figure 6 This is a schematic diagram of a first heat exchange tube inserted into a baffle in some embodiments of the present application.

[0031] Figure 7 This is a schematic diagram of the connection between the evaporation flow equalization device and the deflection device in some embodiments of the present application.

[0032] Figure 8 Schematic diagram of an evaporation porous bottom plate in an evaporation flow equalization device according to some embodiments of the present application.

[0033] Fig. 9 for Figure 8 Top view of the .

[0034] Fig.10 This is a schematic diagram of a condenser according to some embodiments of the present application.

[0035] Fig.11 This is a schematic internal cross-sectional view of a condenser according to some embodiments of the present application.

[0036] Fig.12 Schematic diagram of a condensation flow equalization device according to some embodiments of the present application.

[0037] Fig.13 for Fig.12 Top view of the .

[0038] Fig.14 for Fig.12 main view. Reference numerals:

[0039] 1. Evaporator; 11. First heat exchange tube; 12. First liquid inlet; 13. Liquid outlet; 14. Second liquid inlet; 15. Gas outlet;

[0040] 2. condenser; 21. second heat exchange tube; 22. first inlet; 23. first outlet; 24. second inlet; 25. second outlet;

[0041] 3. Liquid pump; 4. Compressor;

[0042] 5. Condensation flow equalization device; 51. Condensation porous bottom plate; 52. Condensation side plate;

[0043] 6. baffle device; 61. baffle; 61a. upper baffle; 61b. lower baffle; 62. upper connecting rod; 63. lower connecting rod

[0044] 7. Evaporation flow equalization device; 71. Evaporation porous bottom plate; 72. Evaporation side plate;

[0045] 8. Throttling device;

[0046] A. First coolant; B. Second coolant. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0049] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0050] refer to Figure 1Some embodiments of the present application provide a refrigeration system, including an evaporator 1, a condenser 2, a liquid pump 3 and a compressor 4. The liquid pump 3 is arranged between the evaporator 1 and the condenser 2, and is used to drive the refrigerant to circulate between the evaporator 1 and the condenser 2. The compressor 4 is arranged between the evaporator 1 and the condenser 2, and is used to drive the refrigerant to circulate between the evaporator 1 and the condenser 2. The refrigeration system has a first refrigeration mode and a second refrigeration mode. In the first refrigeration mode, the liquid pump 3 works to drive the refrigerant to flow between the evaporator 1 and the condenser 2 in the form of a liquid to achieve phase-change-free refrigeration. In the second refrigeration mode, the compressor 4 works to drive the refrigerant to flow from the condenser 2 into the evaporator 1 in the form of a liquid and transform into a gas to achieve phase-change refrigeration.

[0051] Phase-change-free refrigeration means that after the liquid refrigerant is cooled in the condenser 2, it enters the evaporator 1 in liquid form and absorbs heat in the evaporator 1. Then, it still flows out of the evaporator 1 in liquid form and flows back to the condenser 2 under the action of the liquid pump 3 to be cooled again. No phase change occurs in the whole process.

[0052] Phase change refrigeration means that the gaseous refrigerant is cooled in the condenser 2 and becomes a liquid refrigerant, then enters the evaporator 1 in liquid form, absorbs heat in the evaporator 1, and becomes a gaseous refrigerant, then flows out of the evaporator 1 in gaseous form and flows back to the condenser 2 under the action of the compressor 4 to be cooled again and converted into a gaseous refrigerant. The whole process produces a phase change.

[0053] In the first refrigeration mode, the liquid pump 3 works but the compressor 4 does not work, and in the second refrigeration mode, the compressor 4 works but the liquid pump 3 does not work. In the second refrigeration mode, the compressor 4 needs to continuously extract the gaseous refrigerant from the evaporator 1 to reduce the pressure in the evaporator 1, so that the refrigerant boils and evaporates at a relatively low temperature, and the compressor 4 needs to overcome the inertia and friction resistance of the gas during the gas compression process, which increases energy consumption. In the first refrigeration mode, the liquid pump 3 only pumps the liquid refrigerant from the evaporator 1 to the condenser. Therefore, the energy consumption generated when the compressor 4 works will be greater than the energy consumption of the liquid pump 3.

[0054] The refrigeration system is enabled to switch between a non-phase change refrigeration mode (ie, a first refrigeration mode) and a phase change refrigeration mode (ie, a second refrigeration mode), so as to make the refrigeration system more energy-efficient.

[0055] In some embodiments, when the outside temperature is lower than a set value, the refrigeration system enters a first refrigeration mode, and when the outside temperature is higher than the set value, the refrigeration system enters a second refrigeration mode.

[0056] Specifically, when the outside temperature is low, it is convenient to use the low-temperature cold source in the natural environment to fully cool the refrigerant in the condenser 2, obtain a liquid refrigerant with a lower temperature, and the liquid refrigerant with a lower temperature absorbs heat in the evaporator to achieve cooling of the target object (such as cooling water in the machine room). Then the temperature of the liquid refrigerant rises but still flows to the condenser in liquid form. During the whole process, the compressor 4 does not work, the liquid pump 3 works, and the energy consumption is low. When the outside temperature is high, the coldness of the natural cold source obtained is not enough to fully cool the refrigerant in the condenser 2, and the temperature of the refrigerant is not low enough, so it is impossible to fully cool the target object. Therefore, it is necessary to start the compressor 4 and turn off the liquid pump 3. The compressor reduces the pressure in the evaporator by extracting gas from the evaporator, so that the liquid refrigerant can be converted into gas in the evaporator 1 at a relatively low temperature, and then the gaseous refrigerant enters the condenser 2 to release heat, and the target object is fully cooled by phase change.

[0057] In some embodiments, the evaporator 1 includes a gas outlet arranged at the top of the evaporator 1 and a liquid outlet arranged at the bottom of the evaporator 1, the gas outlet is connected to the compressor 4, and the liquid outlet is connected to the liquid pump 3. In the first refrigeration mode, the refrigerant in liquid form enters the evaporator 1 from the condenser 2 and flows to the liquid pump 3 through the liquid outlet. In the second refrigeration mode, the refrigerant in liquid form enters the evaporator 1 from the condenser 2 and becomes gas and flows to the compressor 4 through the gas outlet.

[0058] Specifically, the inlet of the evaporator 1 is set at the bottom of the evaporator 1, the liquid outlet is set at the bottom of the evaporator 1, and the gas outlet is set at the top of the evaporator 1, so that in the first refrigeration mode, the liquid refrigerant flows in from the bottom of the evaporator 1 and flows out from the bottom, and in the second refrigeration mode, the gaseous refrigerant flows in from the bottom of the evaporator 1 and flows out from the top, which can better drive the refrigerant to flow smoothly between the evaporator 1 and the condenser 2 in different working modes, thereby improving the refrigeration performance of the refrigeration system.

[0059] refer to Figure 2 , 3 , 10 and 11, in some embodiments, a first heat exchange tube 11 for a first coolant A to flow is provided inside the evaporator 1, and the refrigerant exchanges heat with the first coolant A through the first heat exchange tube 11 in the evaporator 1 to reduce the temperature of the first coolant A, and the first coolant A is used to cool the machine room; a second heat exchange tube 21 for a second coolant B to flow is provided inside the condenser 2, and the refrigerant exchanges heat with the second coolant B through the second heat exchange tube 21 in the condenser 2 to reduce the temperature of the refrigerant, and the second coolant B is configured to exchange heat with an external natural cold source.

[0060] Specifically, the evaporator 1 is configured as a horizontal evaporator, and the first heat exchange tube 11 extends in the evaporator 1 along the length direction of the evaporator 1, and the outlet and inlet of the first heat exchange tube 11 are respectively connected to the cooling water pipeline of the machine room. After absorbing the heat of the machine room, the cooling water enters the evaporator 1 through the inlet of the first heat exchange tube 11 to exchange heat with the refrigerant for cooling, and then the low-temperature cooling water flows out of the evaporator 1 through the outlet of the first heat exchange tube 11 to reabsorb the heat of the machine room. The condenser 2 is configured as a bedroom condenser, and the second heat exchange tube 21 extends in the condenser 2 along the length direction of the condenser 2, and the outlet and inlet of the second heat exchange tube 21 are respectively connected to the cooling water pipeline of the external water cooling device (such as a water cooling tower), and the cooling water absorbs the coldness of the natural cold source at the outlet of the water cooling device to obtain low-temperature cooling water, and the low-temperature cooling water enters the condenser 2 through the inlet of the second heat exchange tube 21 to cool the refrigerant, and then the temperature of the cooling water rises and flows out of the condenser 2 from the outlet of the second heat exchange tube 21 and flows to the external water cooling device to absorb the coldness of the natural cold source and cool down. Therefore, when the outside temperature is low, the compressor 4 can be turned off, and the natural cold source can be used as a heat exchange energy to replace the entire compression refrigeration cycle system to dissipate heat in the machine room, effectively saving operating costs and achieving the purpose of energy saving and environmental protection.

[0061] It is worth noting that in the second refrigeration mode, the second coolant B also releases heat with the help of an external water cooling device, such as a cooling tower. Since the temperature of the natural cold source obtained when the outside temperature is higher than the set value is higher than the temperature of the natural cold source obtained when the outside temperature is lower than the set value, if non-phase change refrigeration is used, it is not enough to fully cool the refrigerant in the condenser 2, and then the low-temperature refrigerant in the evaporator 1 is not enough to fully cool the first coolant A, resulting in insufficient heat dissipation effect on the machine room. Therefore, in this mode, it is necessary to use the compressor 4 to make the refrigerant produce a phase change in the evaporator 1, and then fully absorb the heat of the first coolant A. In some embodiments, in order to ensure that the refrigerant in the evaporator 1 can undergo a phase change in the second refrigeration mode, the refrigeration system also includes a throttling device 8 arranged between the evaporator 1 and the condenser 2. The throttling device 8 is used to throttle the refrigerant in the process of the liquid refrigerant flowing from the condenser 2 to the evaporator 1 in the second refrigeration mode, so as to change it into a low-temperature and low-pressure state to better absorb the heat of the first coolant B.

[0062] refer to Figures 11 to 14In some embodiments, the condenser 2 includes an inlet arranged at the top of the condenser 2, and the refrigeration system also includes a condensation flow equalization device 5, which includes a condensation porous bottom plate 51 and a condensation side plate 52 arranged on the edge of the condensation porous bottom plate 51. The condensation flow equalization device 5 is arranged in the top area of ​​the condenser 2, and the condensation porous bottom plate 51, the condensation side plate 52 and the inner wall of the condenser 2 are surrounded to form a condensation flow equalization cavity, and the second heat exchange tube 21 is arranged on the lower side of the condensation flow equalization device 5, so that the refrigerant discharged from the evaporator 1 enters the condensation flow equalization cavity through the inlet of the condenser 2 and then passes through the condensation porous bottom plate 51 to exchange heat with the second heat exchange tube 21.

[0063] Specifically, in the first refrigeration mode, the refrigerant flows from the evaporator 1 to the condenser 2 in liquid form. By setting the inlet of the condenser 2 at the top and forming a condensation flow equalization cavity connected to the inlet at the top of the condenser 2, the liquid refrigerant first fills the entire condensation flow equalization cavity after entering the condenser 2, and then drips evenly onto the second heat exchange tube 21 through the condensation porous bottom plate 51, which greatly increases the contact area between the liquid refrigerant and the second heat exchange tube 21, fully exchanges heat with the cooling water, and thus improves the heat exchange efficiency and effect. In the second refrigeration mode, the refrigerant flows from the evaporator 1 to the condenser 2 in gaseous form. At this time, the gaseous refrigerant contacts the second heat exchange tube 21 for heat exchange after passing through the condensation porous bottom plate 51. At this time, the condensation porous bottom plate 51 plays a role in preventing impact and reducing noise, reducing the direct impact of high-temperature and high-pressure gaseous refrigerant on the heat exchange tube and reducing noise.

[0064] refer to Figure 2 and 7 In some embodiments, the evaporator 1 includes a first liquid inlet 12 and a liquid outlet 13 respectively arranged at both ends of the bottom of the evaporator 1, the liquid outlet 13 is connected to the inlet of the liquid pump 3, and the outlet of the liquid pump 3 is connected to the inlet of the condenser 2. The refrigeration system also includes a baffle device 6 arranged in the evaporator 1, the baffle device 6 is arranged in the bottom area of ​​the evaporator 1, the baffle device 6 includes a plurality of baffles 61 alternately arranged in high and low positions, the plurality of baffles 61 are arranged at intervals between the first liquid inlet 12 and the liquid outlet 13, the first heat exchange tube 11 is inserted in series between the plurality of baffles 61 along the arrangement direction of the plurality of baffles 61, and in the first refrigeration mode, the refrigerant enters the evaporator 1 from the first liquid inlet 12 and flows to the inlet of the condenser 2 through the liquid outlet 13 after being baffled between the plurality of baffles 61.

[0065] Specifically, the first liquid inlet 12 and the liquid outlet 13 are spaced apart in the length direction of the evaporator 1, and a plurality of baffles 61 are arranged between the first liquid inlet 12 and the liquid outlet 13 to form a baffle channel in the length direction, so that in the first refrigeration mode, after the liquid refrigerant enters the evaporator 1 from the first liquid inlet 12, it flows toward the liquid outlet 13 along the baffle channel in an up and down baffle manner, thereby extending the heat exchange stroke and heat exchange time, maximizing the heat exchange between the refrigerant and the first heat exchange tube 11, and enhancing the heat exchange effect.

[0066] It is worth noting that the baffle plate 61 is provided with a plurality of spaced through holes, and the through holes are arranged through the baffle plate 61 in the thickness direction, so that the plurality of evaporation heat exchange tubes 11 are inserted between the plurality of baffle plates 61 .

[0067] refer to Figure 4 and 5 In some embodiments, the plurality of baffles 61 include a plurality of upper baffles 61a and a plurality of lower baffles 61b that are alternately arranged, the upper baffles 61a are higher than the lower baffles 61b, and the upper baffles 61a and the lower baffles 61b partially overlap in the height direction.

[0068] The multiple baffles 61 are regularly arranged alternately in the height direction, so that the multiple baffles 61 can form a regular baffle flow channel. The liquid refrigerant flows upward from the bottom of one side of the lower baffle 61b to the top of the lower baffle 61b, passes over the lower baffle 61b, and then flows downward to the bottom of the other side of the lower baffle 61b, and flows from the lower side of the adjacent upper baffle 61a along the arrangement direction to the side of the next lower baffle 61b, and repeats the above process until it flows out from the liquid outlet 13. In a limited space, the heat exchange stroke and heat exchange time are greatly increased, thereby enhancing the heat exchange effect.

[0069] In some embodiments, the deflector device 6 also includes an upper connecting rod 62 and a lower connecting rod 63 arranged in the evaporator 1, the upper connecting rod 62 and the lower connecting rod 63 both extend along the arrangement direction, and both ends of the upper connecting rod 62 and the lower connecting rod 63 are connected to the inner wall of the evaporator 1, a plurality of upper deflector plates 61a are arranged on the upper connecting rod 62, a plurality of lower deflector plates 61b are arranged on the lower connecting rod 63, and the upper connecting rod 62 is higher than the lower deflector plates 61b, and the lower connecting rod 63 is lower than the upper deflector plates 61a.

[0070] Specifically, the number of upper connecting rods 62 can be set to two, and the two upper connecting rods 62 are parallel and spaced in the width direction of the evaporator 1, and the two upper connecting rods 62 are respectively connected to the two ends of the upper baffle 61a. Similarly, the number of lower connecting rods 63 can be set to two, and the two lower connecting rods 63 are parallel and spaced in the width direction of the evaporator 1, and the two lower connecting rods 63 are respectively connected to the two ends of the lower baffle 61b. The upper connecting rod 62 and the lower connecting rod 63 provide installation sites for the baffle 61, thereby improving the position stability of the baffle 61.

[0071] In some embodiments, in the arrangement direction, the baffles at both ends of the plurality of baffles 61 are configured as lower baffles 61b, and the baffles adjacent to the lower baffles 61b are configured as upper baffles 61a. This solution can increase the heat exchange stroke and improve the heat exchange effect within the limited distance between the first liquid inlet 12 and the liquid outlet 13.

[0072] In some embodiments, the baffles at both ends of the plurality of baffles 61 are respectively adjacent to the first liquid inlet 12 and the liquid outlet 13. In this way, the space between the first liquid inlet 12 and the liquid outlet 13 can be fully utilized, and as many baffles 61 as possible can be arranged, thereby increasing the heat exchange stroke and improving the heat exchange effect.

[0073] refer to Figure 2 , 7 , 8 and 9, in some embodiments, the refrigeration system also includes an evaporation flow equalization device 7, the evaporation flow equalization device 7 includes an evaporation porous bottom plate 71 and an evaporation side plate 72 arranged on the edge of the evaporation porous bottom plate 71, the evaporation flow equalization device 7 is buckled in the bottom area of ​​the evaporator 1 so that the evaporation porous bottom plate 71, the evaporation side plate 72 and the inner wall of the evaporator 1 are enclosed to form an evaporation flow equalization cavity, the first heat exchange tube 11 is arranged on the upper side of the evaporation flow equalization device 7, the evaporator 1 also includes a second liquid inlet 14 arranged at the bottom of the evaporator 1 and a gas outlet 15 arranged at the top of the evaporator 1, the second liquid inlet 14 is connected to the outlet at the bottom of the condenser 2, the gas outlet 15 is connected to the inlet of the compressor 4, and the outlet of the compressor 4 is connected to the inlet of the condenser 2. In the second refrigeration mode, the compressor 4 allows the refrigerant to enter the evaporation flow equalization cavity from the condenser 2 through the second liquid inlet 14 and pass through the evaporation porous bottom plate 71 to exchange heat with the first heat exchange tube 11, and then flow to the inlet of the condenser 2 through the gas outlet 15.

[0074] Specifically, the second liquid inlet 14 is arranged in the middle area of ​​the bottom of the evaporator 1. In the second refrigeration mode, the liquid refrigerant enters the evaporator 1 from the middle of the bottom of the evaporator 1 and goes up, and then passes through the evaporating porous bottom plate 71 so that the liquid refrigerant is evenly distributed on the first heat exchange tube 11 for heat exchange, thereby improving the heat exchange efficiency and heat exchange effect, and at the same time, it can also reduce the liquid refrigerant directly scouring the first heat exchange tube 11 and reduce noise.

[0075] It is worth noting that the condenser 2 includes a first inlet 22 and a second inlet 24 arranged at the top, and a first outlet 23 and a second outlet 25 arranged at the bottom. The first inlet 22 is connected to the outlet of the liquid pump 3, and the first outlet 23 is connected to the first liquid inlet 12 of the evaporator 1. The second inlet 24 is connected to the outlet of the compressor 4, and the second outlet 25 is connected to the second liquid inlet 14 of the evaporator 1. In the two refrigeration modes, the refrigerant circulates between the evaporator 1 and the condenser 2 along two different pipelines.

[0076] refer to Figures 5 to 7 In some embodiments, the evaporation flow equalization device 7 is arranged at the bottom of multiple baffles 61, and the evaporation side plate 72 includes two side sealing plates located at both ends of the evaporation porous bottom plate 71 in the length direction of the evaporation porous bottom plate 71, and the two side sealing plates are respectively connected to the baffles at both ends of the multiple baffles 61.

[0077] Specifically, the length direction of the evaporation porous bottom plate 71 is consistent with the length direction of the evaporator 1. The evaporation side plates 72 are only arranged at the two ends of the length direction of the evaporation porous bottom plate 71, and no evaporation side plates 72 are arranged at the two ends of the width direction of the evaporation porous bottom plate 71. The arc-shaped inner wall of the evaporator 1 cooperates with the evaporation porous bottom plate 71 and the side sealing plates from both sides of the width direction of the evaporation side plate 72 to enclose an evaporation flow equalization chamber. The overall length of the evaporation flow equalization device (i.e., the length of the evaporation porous bottom plate 71 plus the thickness of the two evaporation side plates 72) is equal to the spacing between the baffles at both ends of the multiple baffles 61. The two ends of the evaporation porous bottom plate 71 are welded to the two side sealing plates, and the two side sealing plates are respectively welded to the bottom surfaces of the baffles at both ends, so that the evaporation flow equalization device 7 is connected to the baffle device 6 as a whole, thereby enhancing the overall stability.

[0078] The working process of the refrigeration system of the present application is briefly described below.

[0079] When the ambient temperature is higher than the set value, or in summer, the liquid pump 3 is turned off and the compressor 4 is started. The compressor 4 extracts the gaseous refrigerant from the evaporator 1 through the gas outlet 15 of the evaporator 1, and the gaseous refrigerant enters the condensation equalization chamber through the second inlet 24 at the top of the condenser 2, and then evenly exchanges heat with the second heat exchange tube 21 through the condensation porous bottom plate 51, absorbs the temperature of the second cooling liquid B in the second heat exchange tube 21, and then forms a liquid refrigerant that flows out from the second outlet 25 at the bottom of the condenser 2, and enters the evaporation equalization chamber through the second liquid inlet 14 of the evaporator 1, wherein the second cooling liquid B, after the temperature rises, passes through an external water cooling device, such as a cooling tower, absorbs the heat dissipated by the natural cold source and cools down, and then flows back to the second heat exchange tube 21 to cool the refrigerant.

[0080] After the refrigerant enters the evaporation uniform flow chamber through the second liquid inlet 14 of the evaporator 1, it evenly exchanges heat with the first heat exchange tube 11 through the evaporation porous bottom plate 71 to form a gaseous refrigerant, and flows out through the gas outlet 15. In the process of the refrigerant being transformed from liquid refrigerant to gaseous refrigerant, it absorbs the temperature of the first cooling liquid A in the first heat exchange tube 11, so that the temperature of the first cooling liquid A is reduced and heat is dissipated to the machine room.

[0081] When the ambient temperature is lower than the set value, or in winter, the compressor 4 is turned off and the liquid pump 3 is started. The refrigerant in the evaporator 1 flows from the liquid outlet 13 to the first inlet 22 of the condenser 2 in liquid form, and then drips evenly through the condensation flow chamber to the second heat exchange tube 21 for heat exchange and cooling. The second cooling liquid B in the second heat exchange tube 21 heats up after absorbing the heat of the liquid refrigerant, and then flows to the water cooling tower, absorbing the coldness of the natural cold source to cool down and then dissipate the heat of the refrigerant again. The low-temperature liquid refrigerant flows from the first outlet 23 to the first liquid inlet 12 of the evaporator 1 and enters the bottom of the evaporator 1, and is baffled between multiple baffles 61. In the process of bafflement, the heat exchange stroke and heat exchange time with the first heat exchange tube 11 are extended to fully absorb the temperature of the first cooling liquid A in the first heat exchange tube 11, so that the temperature of the first cooling liquid A is reduced, so that the heat can be dissipated to the machine room. At the same time, the temperature of the refrigerant rises during the heat exchange process, and flows from the liquid outlet 13 to the condenser 2 to cool down.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present application, which should be included in the scope of the technical solution for protection in the present application.

Claims

1. A refrigeration system, characterized in that: include: Evaporator (1); Condenser (2); a liquid pump (3), arranged between the evaporator (1) and the condenser (2), and used for driving the refrigerant to circulate between the evaporator (1) and the condenser (2); and A compressor (4) is arranged between the evaporator (1) and the condenser (2), and is used to drive the refrigerant to circulate between the evaporator (1) and the condenser (2). The refrigeration system has a first refrigeration mode and a second refrigeration mode. In the first refrigeration mode, the liquid pump (3) works to drive the refrigerant to flow between the evaporator (1) and the condenser (2) in the form of liquid to achieve phase-change refrigeration. In the second refrigeration mode, the compressor (4) works to drive the refrigerant to flow from the condenser (2) in the form of liquid into the evaporator (1) and transform into gas to achieve phase-change refrigeration.

2. The refrigeration system according to claim 1, characterized in that: When the outside temperature is lower than a set value, the refrigeration system enters the first refrigeration mode, and when the outside temperature is higher than the set value, the refrigeration system enters the second refrigeration mode.

3. The refrigeration system according to claim 2, characterized in that: The evaporator (1) comprises a gas outlet arranged at the top of the evaporator (1) and a liquid outlet arranged at the bottom of the evaporator (1), the gas outlet being connected to the compressor (4), and the liquid outlet being connected to the liquid pump (3). In the first refrigeration mode, the refrigerant in liquid form enters the evaporator (1) from the condenser (2) and flows to the liquid pump (3) through the liquid outlet. In the second refrigeration mode, the refrigerant in liquid form enters the evaporator (1) from the condenser (2) and becomes gas, and flows to the compressor (4) through the gas outlet.

4. The refrigeration system according to claim 1, characterized in that: The evaporator (1) is provided with a first heat exchange tube (11) for a first coolant to flow through, and the refrigerant exchanges heat with the first coolant through the first heat exchange tube (11) in the evaporator (1) to reduce the temperature of the first coolant (A), and the first coolant (A) is used to cool the machine room; the condenser (2) is provided with a second heat exchange tube (21) for a second coolant (B) to flow through, and the refrigerant exchanges heat with the second coolant (B) in the condenser (2) to reduce the temperature of the refrigerant, and the second coolant (B) is configured to exchange heat with an external natural cold source.

5. The refrigeration system according to claim 4, characterized in that: The condenser (2) includes an inlet arranged at the top of the condenser (2), and the refrigeration system also includes a condensation flow equalization device (5), the condensation flow equalization device (5) includes a condensation porous bottom plate (51) and a condensation side plate (52) arranged at the edge of the condensation porous bottom plate (51), the condensation flow equalization device (5) is arranged in the top area of ​​the condenser (2), the condensation porous bottom plate (51), the condensation side plate (52) and the inner wall of the condenser (2) are surrounded to form a condensation flow equalization cavity, and the second heat exchange tube (21) is arranged on the lower side of the condensation flow equalization device (5), so that the refrigerant discharged from the evaporator (1) enters the condensation flow equalization cavity through the inlet of the condenser (2) and then passes through the condensation porous bottom plate (51) to exchange heat with the second heat exchange tube (21).

6. The refrigeration system according to claim 4, characterized in that: The evaporator (1) comprises a first liquid inlet (12) and a liquid outlet (13) respectively arranged at two ends of the bottom of the evaporator (1); the liquid outlet (13) is connected to the inlet of the liquid pump (3); the outlet of the liquid pump (3) is connected to the inlet of the condenser (2); the refrigeration system further comprises a baffle device (6) arranged in the evaporator (1); the baffle device (6) is arranged in the bottom area of ​​the evaporator (1); the baffle device (6) comprises a plurality of baffles arranged alternately in high and low positions. baffles (61), wherein a plurality of the baffles (61) are arranged at intervals between the first liquid inlet (12) and the liquid outlet (13); the first heat exchange tube (11) is inserted in series between the plurality of the baffles (61) along the arrangement direction of the plurality of the baffles (61); in the first refrigeration mode, the refrigerant enters the evaporator (1) from the first liquid inlet (12) and flows through the liquid outlet (13) to the inlet of the condenser (2) after being baffled between the plurality of the baffles (61).

7. The refrigeration system according to claim 6, characterized in that: The plurality of baffles (61) include a plurality of upper baffles (61a) and a plurality of lower baffles (61b) that are alternately arranged, the upper baffles (61a) being higher than the lower baffles (61b), and the upper baffles (61a) and the lower baffles (61b) partially overlap in a height direction.

8. The refrigeration system according to claim 7, characterized in that: The deflector device (6) further comprises an upper connecting rod (62) and a lower connecting rod (63) arranged in the evaporator (1); the upper connecting rod (62) and the lower connecting rod (63) both extend along the arrangement direction, and both ends of the upper connecting rod (62) and the lower connecting rod (63) are connected to the inner wall of the evaporator (1); the plurality of upper deflector plates (61a) are arranged on the upper connecting rod (62), and the plurality of lower deflector plates (61b) are arranged on the lower connecting rod (63); the upper connecting rod (62) is higher than the lower deflector plates (61b), and the lower connecting rod (63) is lower than the upper deflector plates (61a).

9. The refrigeration system according to claim 7, characterized in that: In the arrangement direction, the baffles at both ends of the plurality of baffles (61) are configured as the lower baffles (61b), and the baffles adjacent to the lower baffles (61b) are configured as the upper baffles (61a).

10. The refrigeration system according to claim 6, characterized in that: The baffles at both ends of the plurality of baffles (61) are respectively adjacent to the first liquid inlet (12) and the liquid outlet (13).

11. The refrigeration system according to claim 4, characterized in that: The refrigeration system further comprises an evaporation flow balancing device (7), the evaporation flow balancing device (7) comprising an evaporation porous bottom plate (71) and an evaporation side plate (72) arranged at the edge of the evaporation porous bottom plate (71), the evaporation flow balancing device (7) being buckled in the bottom area of ​​the evaporator (1) so that the evaporation porous bottom plate (71), the evaporation side plate (72) and the inner wall of the evaporator (1) enclose an evaporation flow balancing chamber, the first heat exchange tube (11) being arranged on the upper side of the evaporation flow balancing device (7), and the evaporator (1) further comprising a second liquid inlet (14) arranged at the bottom of the evaporator (1) and a second liquid inlet (15) arranged at the bottom of the evaporator (1). The gas outlet (15) at the top of the evaporator (1) and the second liquid inlet (14) are connected to the outlet at the bottom of the condenser (2), the gas outlet (15) is connected to the inlet of the compressor (4), and the outlet of the compressor (4) is connected to the inlet of the condenser (2). In the second refrigeration mode, the compressor (4) allows the refrigerant to enter the evaporation flow chamber from the condenser (2) through the second liquid inlet (14) and pass through the evaporation porous bottom plate (71) to exchange heat with the first heat exchange tube (11), and then flow to the inlet of the condenser (2) through the gas outlet (15).

12. The refrigeration system according to claim 11, characterized in that: The evaporator (1) comprises a first liquid inlet (12) and a liquid outlet (13) arranged at intervals at the bottom of the evaporator (1); the liquid outlet (12) is connected to the inlet of the liquid pump (3); the outlet of the liquid pump (3) is connected to the inlet of the condenser (2); the refrigeration system further comprises a plurality of baffles (61); the plurality of baffles (61) are arranged at intervals between the first liquid inlet (12) and the liquid outlet (13); in the first refrigeration mode, the refrigerant is baffled between the plurality of baffles (61) in the process of flowing from the first liquid inlet (12) to the liquid outlet (13); the evaporation flow equalizing device (7) is arranged at the bottom of the plurality of baffles (61); the evaporation side plate (72) comprises two side sealing plates located at two ends of the evaporation porous bottom plate (71) in the length direction of the evaporation porous bottom plate (71); the two side sealing plates are respectively connected to the baffles at two ends of the plurality of baffles (61).

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