Refrigeration system

Abstract

The utility model 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 technical field of refrigeration, in particular to a refrigeration system. BACKGROUND

[0002] At present, with the development of information industry, the number of communication efficient machine rooms increases sharply. Since the machines in the communication machine room generate a large amount of heat when working, in order to maintain the normal work of the machines in the machine room, large water-cooled refrigeration equipment needs to be set to ensure the environment temperature inside the machine room, and needs to be refrigerated all year round. The traditional water-cooled refrigeration unit mainly uses a compression refrigeration cycle system, including compression, condensation, throttling, evaporation and other four processes, and its principle is as follows: the compressor applies energy to the refrigerant vapor, the high-temperature and high-pressure refrigerant vapor discharged by the compressor releases heat in the condenser through the copper pipe with relatively low temperature cooling water, the temperature is lowered, and at the same time, the condensation becomes liquid at the saturation pressure. The high-temperature and high-pressure refrigerant liquid from the bottom of the condenser flows through the throttling device to expand, the pressure and temperature are lowered, and the low-pressure and low-temperature refrigerant liquid enters the evaporator. The compressor continuously extracts the refrigerant vapor from the evaporator, and since the compressor extracts the refrigerant, the pressure of the evaporator is reduced, so that the remaining refrigerant in the evaporator boils and evaporates at a relatively low temperature. The refrigerant gasification absorbs the heat of the circulating water in the heat transfer pipe to lower the temperature, so as to obtain the cold water required by air conditioning or industrial treatment. The whole refrigeration process needs to consume a large amount of electric power to compress the refrigerant, the system has large energy consumption and low seasonal energy efficiency ratio.

[0003] It should be noted that the statements in this part of the background art only provide background technology related to the present application, and do not necessarily constitute prior art. CONTENT OF THE UTILITY MODEL

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

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

[0006] an evaporator;

[0007] a condenser;

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

[0009] a compressor arranged between the evaporator and the condenser, for driving the refrigerant to circulate between the evaporator and the condenser,

[0010] The refrigeration system has a first refrigeration mode and a second refrigeration mode. In the first refrigeration mode, the liquid pump is operated to drive the refrigerant in liquid form to flow between the evaporator and the condenser to achieve non-phase-change refrigeration. In the second refrigeration mode, the compressor is operated to drive the refrigerant in liquid form to flow from the condenser to the evaporator and to be converted into gas to achieve phase-change refrigeration.

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

[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 the first refrigeration mode, the refrigerant in liquid form flows from the condenser to the evaporator and then flows to the liquid pump through the liquid outlet. In the second refrigeration mode, the refrigerant in liquid form flows from the condenser to the evaporator and is converted into gas and then flows to the compressor through the gas outlet.

[0013] In some embodiments, the evaporator is internally provided with a first heat exchange pipe for the flow of a first cooling liquid. The refrigerant exchanges heat with the first cooling liquid in the evaporator through the first heat exchange pipe to reduce the temperature of the first cooling liquid, and the first cooling liquid is used to cool the machine room. The condenser is internally provided with a second heat exchange pipe for the flow of a second cooling liquid. The refrigerant exchanges heat with the second cooling liquid in the condenser through the second heat exchange pipe to reduce the temperature of the refrigerant, and the second cooling liquid is configured to exchange heat with the natural cooling source of the outside world.

[0014] In some embodiments, the condenser includes an inlet arranged at the top of the condenser. The refrigeration system further includes a condensation flow uniformizing device. The condensation flow uniformizing device includes a condensation porous bottom plate and a condensation side plate arranged at the edge of the condensation porous bottom plate. The condensation flow uniformizing device is arranged at the top area inside the condenser. The condensation porous bottom plate and the condensation side plate, together with the inner wall of the condenser, form a condensation flow uniformizing cavity. The second heat exchange pipe is arranged at the lower side of the condensation flow uniformizing device, so that the refrigerant discharged from the evaporator enters the condensation flow uniformizing cavity through the inlet of the condenser and then exchanges heat with the second heat exchange pipe through the condensation porous bottom plate.

[0015] In some embodiments, the evaporator comprises a first liquid inlet and a liquid outlet disposed at two ends of a bottom of the evaporator respectively, the liquid outlet is connected with an inlet of a liquid pump, an outlet of the liquid pump is connected with an inlet of the condenser, the refrigeration system further comprises a baffle device disposed in the evaporator, the baffle device is disposed in a bottom region of the evaporator, the baffle device comprises a plurality of baffles arranged alternately in height, the plurality of baffles are arranged in a spacing manner between the first liquid inlet and the liquid outlet, the first heat exchange tube is inserted between the plurality of baffles along the arrangement direction of the plurality of baffles, 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 comprises a plurality of upper baffles and a plurality of lower baffles arranged alternately, the upper baffles are higher than the lower baffles, and the upper baffles partially overlap the lower baffles in the height direction.

[0017] In some embodiments, the baffle device further comprises an upper link and a lower link disposed in the evaporator, the upper link and the lower link both extend along the arrangement direction, and both ends of the upper link and the lower link are connected with the inner wall of the evaporator, the plurality of upper baffles are disposed on the upper link, the plurality of lower baffles are disposed on the lower link, and the upper link is higher than the lower baffles, and the lower link is lower than the upper baffles.

[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 further comprises an evaporation flow equalization device, the evaporation flow equalization device comprises an evaporation porous bottom plate and an evaporation side plate disposed at the edge of the evaporation porous bottom plate, the evaporation flow equalization device is buckled in the bottom region of the evaporator to form an evaporation flow equalization cavity enclosed by the evaporation porous bottom plate, the evaporation side plate and the inner wall of the evaporator, the first heat exchange tube is disposed on the upper side of the evaporation flow equalization device, the evaporator further comprises a second liquid inlet disposed at the bottom of the evaporator and a gas outlet disposed at the top of the evaporator, the second liquid inlet is connected with the outlet of the bottom of the condenser, the gas outlet is connected with the inlet of the compressor, the outlet of the compressor is connected with the inlet of the condenser, in the second refrigeration mode, the compressor makes the refrigerant enter the evaporation flow equalization cavity from the condenser through the second liquid inlet and exchange heat with the first heat exchange tube through the evaporation porous bottom plate, and then flows to the inlet of the condenser through the gas outlet.

[0021] In some embodiments, the evaporator comprises a first liquid inlet and a liquid outlet arranged at the bottom of the evaporator, the liquid outlet is connected with an inlet of a liquid pump, an outlet of the liquid pump is connected with an inlet of the condenser, the refrigeration system further comprises a plurality of baffles arranged between the first liquid inlet and the liquid outlet, in the first refrigeration mode, the refrigerant is deflected between the plurality of baffles during flowing from the first liquid inlet to the liquid outlet, the evaporation flow uniformizing device is arranged at the bottom of the plurality of baffles, the evaporation side plate comprises two side sealing plates arranged at both ends of the evaporation porous bottom plate in the length direction of the evaporation porous bottom plate, and the two side sealing plates are respectively connected with baffles at both ends of the plurality of baffles.

[0022] Based on the technical scheme provided in the present application, the refrigeration system comprises 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 in the form of liquid between the evaporator and the condenser to realize non-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 liquid and to be converted into gas to realize phase-change refrigeration. The refrigeration system can be switched between the non-phase-change refrigeration mode (i.e. the first refrigeration mode) and the phase-change refrigeration mode (i.e. the second refrigeration mode), so that the refrigeration system is more energy-saving.

[0023] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0025] Figure 1 It is a whole schematic diagram of the refrigeration system of some embodiments of the present application.

[0026] Figure 2 It is a schematic diagram of the evaporator of some embodiments of the present application.

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

[0028] Figure 4 It is a schematic diagram of the alternate arrangement of the upper baffle and the lower baffle in the deflection device of some embodiments of the present application.

[0029] Figure 5A perspective view of the baffle device in the evaporator of some embodiments of the present application.

[0030] Figure 6 A schematic view of the first heat exchange tube penetrating through the baffle plate of some embodiments of the present application.

[0031] Figure 7 A schematic view of the evaporation flow uniformizing device connected to the baffle device of some embodiments of the present application.

[0032] Figure 8 A schematic view of the evaporation porous bottom plate in the evaporation flow uniformizing device of some embodiments of the present application.

[0033] Figure 9 A top view of Figure 8 .

[0034] Figure 10 A schematic view of the condenser of some embodiments of the present application.

[0035] Figure 11 A schematic view of the internal cross section of the condenser of some embodiments of the present application.

[0036] Figure 12 A schematic view of the condensation flow uniformizing device of some embodiments of the present application.

[0037] Figure 13 A top view of Figure 12 .

[0038] Figure 14 A front view of Figure 12 .

[0039] Reference signs

[0040] 1. Evaporator; 11. First heat exchange tube; 12. First liquid inlet; 13. Liquid outlet; 14. Second liquid inlet; 15. Gas outlet;

[0041] 2. Condenser; 21. Second heat exchange tube; 22. First inlet; 23. First outlet; 24. Second inlet; 25. Second outlet;

[0042] 3. Liquid pump; 4. Compressor;

[0043] 5. Condensation flow uniformizing device; 51. Condensation porous bottom plate; 52. Condensation side plate;

[0044] 6. Baffle device; 61. Baffle plate; 61a. Upper baffle plate; 61b. Lower baffle plate; 62. Upper connecting rod; 63. Lower connecting rod

[0045] 7. Evaporation flow uniformizing device; 71. Evaporation porous bottom plate; 72. Evaporation side plate;

[0046] 8. Throttle device

[0047] A. First coolant; B. Second coolant. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The following description of at least one exemplary embodiment is merely illustrative in nature and not intended to be limiting on the application or its application or uses. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0049] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the embodiments are not intended to limit the scope of the present application unless otherwise specifically stated. Meanwhile, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship for the convenience of description. The techniques, methods, and devices known to those of ordinary skill in the related art can not be discussed in detail, but should be considered as part of the specification under appropriate circumstances. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0050] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", etc. can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device as described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways, and the spatial relative descriptions used herein are interpreted accordingly.

[0051] Reference Figure 1Some embodiments of the present application provide a refrigeration system, which includes 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 in the form of liquid between the evaporator 1 and the condenser 2 to achieve non-phase-change refrigeration. In the second refrigeration mode, the compressor 4 works to drive the refrigerant to flow from the condenser 2 to the evaporator 1 in the form of liquid and to be converted into gas to achieve phase-change refrigeration.

[0052] Non-phase-change refrigeration refers to that the liquid refrigerant is cooled in the condenser 2, enters the evaporator 1 in the form of liquid, absorbs heat in the evaporator 1, and then flows out of the evaporator 1 in the form of liquid and flows back to the condenser 2 under the action of the liquid pump 3 to be cooled and lowered in temperature again, and the whole process does not have phase change.

[0053] Phase-change refrigeration refers to that the gaseous refrigerant is cooled in the condenser 2 to become liquid refrigerant, then enters the evaporator 1 in the form of liquid, absorbs heat in the evaporator 1, is converted into gaseous refrigerant, then flows out of the evaporator 1 in the form of gas and flows back to the condenser 2 under the action of the compressor 4 to be cooled and lowered in temperature again, is converted into gaseous refrigerant, and the whole process has phase change.

[0054] In the first refrigeration mode, the liquid pump 3 works and the compressor 4 does not work, and in the second refrigeration mode, the compressor 4 works and the liquid pump 3 does not work. Since in the second refrigeration mode, the compressor 4 needs to continuously extract gaseous refrigerant from the evaporator 1 to reduce the pressure in the evaporator 1 to facilitate the refrigerant to boil and evaporate at a relatively low temperature, and the compressor 4 needs to overcome the inertia and frictional resistance of the gas in the process of compressing the gas, which increases the energy consumption. In the first refrigeration mode, the liquid pump 3 only pumps liquid refrigerant from the evaporator 1 to the condenser. Therefore, the energy consumption generated by the compressor 4 working will be greater than the energy consumption of the liquid pump 3.

[0055] The refrigeration system can be switched between the non-phase-change refrigeration mode (i.e. the first refrigeration mode) and the phase-change refrigeration mode (i.e. the second refrigeration mode), so that the refrigeration system is more energy-saving.

[0056] In some embodiments, 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.

[0057] Specifically, when the outside temperature is low, the low temperature cold source in the natural environment is utilized to sufficiently cool the refrigerant in the condenser 2, so as to obtain liquid refrigerant at a lower temperature. The liquid refrigerant absorbs heat in the evaporator to cool the target object (for example, the cooling water of the computer room), and then the temperature of the liquid refrigerant is increased but still in the form of liquid to flow to the condenser. In 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 cold quantity of the natural cold source obtained is not enough to sufficiently cool the refrigerant in the condenser 2, and the temperature of the refrigerant is not low enough to sufficiently cool the target object. Therefore, the compressor 4 needs to be started, and the liquid pump 3 needs to be turned off. The compressor reduces the pressure in the evaporator by extracting gas in the evaporator, so that the liquid refrigerant can be changed into gas at a relatively low temperature in the evaporator 1. Then, the gaseous refrigerant enters the condenser 2 to release heat, and the phase change is utilized to sufficiently cool the target object.

[0058] 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 with the compressor 4, and the liquid outlet is connected with the liquid pump 3. In the first refrigeration mode, the refrigerant in the form of liquid flows from the condenser 2 to the liquid pump 3 through the liquid outlet after entering the evaporator 1. In the second refrigeration mode, the refrigerant in the form of liquid changes into gas and flows to the compressor 4 through the gas outlet after entering the evaporator 1.

[0059] Specifically, the inlet of the evaporator 1 is arranged at the bottom of the evaporator 1, the liquid outlet is arranged at the bottom of the evaporator 1, and the gas outlet is arranged at the top of the evaporator 1. In the first refrigeration mode, the liquid refrigerant flows into and flows out from the bottom of the evaporator 1, and in the second refrigeration mode, the gaseous refrigerant flows into from the bottom of the evaporator 1 and flows out from the top of the evaporator 1. This 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.

[0060] Reference Figure 2 , 3 , 10 and 11, in some embodiments, the evaporator 1 is internally provided with a first heat exchange pipe 11 for the flow of the first cooling liquid A. The refrigerant exchanges heat with the first cooling liquid A in the evaporator 1 through the first heat exchange pipe 11 to reduce the temperature of the first cooling liquid A, and the first cooling liquid A is used to cool the computer room. The condenser 2 is internally provided with a second heat exchange pipe 21 for the flow of the second cooling liquid B. The refrigerant exchanges heat with the second cooling liquid B in the condenser 2 through the second heat exchange pipe 21 to reduce the temperature of the refrigerant, and the second cooling liquid B is configured to exchange heat with the natural cold source outside.

[0061] Specifically, the evaporator 1 is configured as a horizontal evaporator, the first heat exchange pipe 11 extends in the length direction of the evaporator 1, and the outlet and the inlet of the first heat exchange pipe 11 are respectively connected with 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 pipe 11 to exchange heat with the refrigerant and be cooled, and then the low-temperature cooling water flows out of the evaporator 1 through the outlet of the first heat exchange pipe 11 to reabsorb the heat of the machine room. The condenser 2 is configured as a horizontal condenser, the second heat exchange pipe 21 extends in the length direction of the condenser 2, and the outlet and the inlet of the second heat exchange pipe 21 are respectively connected with the cooling water pipeline of the external water cooling device (for example, a water cooling tower). The cooling water is cooled to low-temperature cooling water by absorbing the cold energy of the natural cold source, the low-temperature cooling water enters the condenser 2 through the inlet of the second heat exchange pipe 21 to cool the refrigerant, and then the temperature of the cooling water rises and flows out of the condenser 2 through the outlet of the second heat exchange pipe 21 and flows to the external water cooling device to absorb the cold energy of the natural cold source and be cooled. Therefore, when the external temperature is low, the compressor 4 can be closed, the natural cold source is used as the heat exchange energy instead of the entire compression refrigeration cycle system to dissipate the heat of the machine room, the operation cost is effectively saved, and the purpose of energy saving and environmental protection is achieved.

[0062] It is worth noting that in the second refrigeration mode, the second cooling liquid B also releases heat by means of the external water cooling device, for example, a cooling tower. Since the temperature of the natural cold source obtained when the external temperature is higher than the set value is higher than the temperature of the natural cold source obtained when the external temperature is lower than the set value, if no phase change refrigeration is used, the refrigerant in the condenser 2 cannot be sufficiently cooled, and then the low-temperature refrigerant in the evaporator 1 cannot sufficiently cool the first cooling liquid A, resulting in poor heat dissipation effect of the machine room. Therefore, in this mode, the compressor 4 is needed to make the refrigerant in the evaporator 1 change phase, so as to sufficiently absorb the heat of the first cooling liquid A. In some embodiments, in order to ensure that the refrigerant in the evaporator 1 can change phase in the second refrigeration mode, the refrigeration system further comprises a throttling device 8 arranged between the evaporator 1 and the condenser 2. The throttling device 8 is used to throttle the refrigerant during the process of 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, so as to better absorb the heat of the first cooling liquid B.

[0063] Reference Figures 11-14In some embodiments, the condenser 2 comprises an inlet arranged at the top of the condenser 2, and the refrigeration system further comprises a condenser flow uniformizing device 5, which comprises a condenser porous bottom plate 51 and condenser side plates 52 arranged at the edges of the condenser porous bottom plate 51, and is arranged at the top region inside the condenser 2, and the condenser porous bottom plate 51 and the condenser side plates 52 and the inner wall of the condenser 2 form a condenser flow uniformizing cavity, and the second heat exchange pipe 21 is arranged at the lower side of the condenser flow uniformizing device 5, so that the refrigerant discharged from the evaporator 1 enters the condenser flow uniformizing cavity through the inlet of the condenser 2 and then exchanges heat with the second heat exchange pipe 21 through the condenser porous bottom plate 51.

[0064] Specifically, in the first refrigeration mode, the refrigerant flows from the evaporator 1 to the condenser 2 in the form of liquid, by arranging the inlet of the condenser 2 at the top and forming a condenser flow uniformizing cavity communicating with the inlet at the top of the condenser 2, so that the liquid refrigerant first fills the entire condenser flow uniformizing cavity after entering the condenser 2, and then uniformly drips on the second heat exchange pipe 21 through the condenser porous bottom plate 51, greatly increasing the contact area of the liquid refrigerant with the second heat exchange pipe 21, fully exchanging heat with the cooling water, and thereby improving the heat exchange efficiency and heat exchange effect. In the second refrigeration mode, the refrigerant flows from the evaporator 1 to the condenser 2 in the form of gas, at this time the gaseous refrigerant exchanges heat with the second heat exchange pipe 21 after passing through the condenser porous bottom plate 51, at this time the condenser 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 pipe, and reducing noise.

[0065] Reference Figure 2 and 7 In some embodiments, the evaporator 1 comprises a first liquid inlet 12 and a liquid outlet 13 arranged at the two ends of the bottom of the evaporator 1 respectively, the liquid outlet 13 is connected with the inlet of the liquid pump 3, the outlet of the liquid pump 3 is connected with the inlet of the condenser 2, and the refrigeration system further comprises a baffle device 6 arranged in the evaporator 1, the baffle device 6 is arranged at the bottom region inside the evaporator 1, the baffle device 6 comprises a plurality of baffle plates 61 arranged alternately in high and low positions, the plurality of baffle plates 61 are arranged in intervals between the first liquid inlet 12 and the liquid outlet 13, and the first heat exchange pipe 11 is inserted between the plurality of baffle plates 61 along the arrangement direction of the plurality of baffle plates 61, in the first refrigeration mode, the refrigerant enters the evaporator 1 from the first liquid inlet 12 and is deflected between the plurality of baffle plates 61, and then flows to the inlet of the condenser 2 through the liquid outlet 13.

[0066] Specifically, the first liquid inlet 12 and the liquid outlet 13 are arranged at intervals 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 flow 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 to the liquid outlet 13 in a manner of flowing up and down in the baffle flow channel, prolonging the heat exchange travel and heat exchange time, maximizing the heat exchange between the refrigerant and the first heat exchange tube 11, and enhancing the heat exchange effect.

[0067] It is worth noting that the baffle 61 is provided with a plurality of spaced through holes, which are arranged in the thickness direction of the baffle 61, so that a plurality of evaporative heat exchange tubes 11 are inserted between the plurality of baffles 61.

[0068] Reference Figure 4 and 5 In some embodiments, the plurality of baffles 61 includes a plurality of upper baffles 61a and a plurality of lower baffles 61b arranged alternately, 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.

[0069] The plurality of baffles 61 are regularly arranged alternately in the height direction, so that the plurality of baffles 61 form a regular baffle flow channel, the liquid refrigerant flows from the bottom of one side of the lower baffle 61b to the top of the lower baffle 61b, then overflows the lower baffle 61b, and then flows down to the bottom of the other side of the lower baffle 61b, and flows from the lower side of the adjacent upper baffle 61a to the side of the next lower baffle 61b in the arrangement direction, and repeats the above process until it flows out from the liquid outlet 13, greatly increasing the heat exchange travel and heat exchange time in a limited space, and enhancing the heat exchange effect.

[0070] In some embodiments, the baffle device 6 further includes an upper link 62 and a lower link 63 arranged in the evaporator 1, the upper link 62 and the lower link 63 extend in the arrangement direction, and the two ends of the upper link 62 and the lower link 63 are connected with the inner wall of the evaporator 1, the plurality of upper baffles 61a are arranged on the upper link 62, the plurality of lower baffles 61b are arranged on the lower link 63, and the upper link 62 is higher than the lower baffle 61b, and the lower link 63 is lower than the upper baffle 61a.

[0071] Specifically, the number of the upper connecting rods 62 can be set to two, and the two upper connecting rods 62 are distributed in parallel and at intervals in the width direction of the evaporator 1, and the two upper connecting rods 62 are respectively connected with the two ends of the upper baffle 61a. Similarly, the number of the lower connecting rods 63 can be set to two, and the two lower connecting rods 63 are distributed in parallel and at intervals in the width direction of the evaporator 1, and the two lower connecting rods 63 are respectively connected with the two ends of the lower baffle 61b. The upper connecting rods 62 and the lower connecting rods 63 provide mounting sites for the baffles 61, and improve the position stability of the baffles 61.

[0072] In some embodiments, in the arrangement direction, the baffles at the two 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. This scheme 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.

[0073] In some embodiments, the baffles at the two 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 the number of the baffles 61 can be as large as possible, so as to increase the heat exchange stroke and improve the heat exchange effect.

[0074] Reference Figure 2 、 7 , 8 and 9, in some embodiments, the refrigeration system further comprises an evaporation flow uniformizing device 7, the evaporation flow uniformizing device 7 comprises 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 uniformizing device 7 is buckled at the bottom area in the evaporator 1 to form an evaporation flow uniformizing cavity with the evaporation porous bottom plate 71, the evaporation side plate 72 and the inner wall of the evaporator 1, the first heat exchange pipe 11 is arranged on the upper side of the evaporation flow uniformizing device 7, the evaporator 1 further comprises 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 with the outlet at the bottom of the condenser 2, the gas outlet 15 is connected with the inlet of the compressor 4, the outlet of the compressor 4 is connected with the inlet of the condenser 2, in the second refrigeration mode, the compressor 4 makes the refrigerant from the condenser 2 enter the evaporation flow uniformizing cavity through the second liquid inlet 14 and exchange heat with the first heat exchange pipe 11 through the evaporation porous bottom plate 71, and then flows to the inlet of the condenser 2 through the gas outlet 15.

[0075] Specifically, the second liquid inlet 14 is arranged at 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 area of the bottom of the evaporator 1 and flows upward, and then passes through the evaporation porous bottom plate 71 to make the liquid refrigerant uniformly distributed on the first heat exchange pipe 11 for heat exchange, so as to improve the heat exchange efficiency and heat exchange effect, and also reduce the direct scouring of the liquid refrigerant on the first heat exchange pipe 11 and reduce the noise.

[0076] It is worth mentioning 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 with the outlet of the liquid pump 3, and the first outlet 23 is connected with the first liquid inlet 12 of the evaporator 1. The second inlet 24 is connected with the outlet of the compressor 4, and the second outlet 25 is connected with the second liquid inlet 14 of the evaporator 1. In the two refrigeration modes, the refrigerant circulates and flows between the evaporator 1 and the condenser 2 along two different pipelines.

[0077] Reference Figures 5-7 In some embodiments, the evaporation flow uniformizing device 7 is arranged at the bottom of the plurality of 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 with the baffles at both ends of the plurality of baffles 61.

[0078] Specifically, the length direction of the evaporation porous bottom plate 71 is consistent with the length direction of the evaporator 1. The evaporation side plate 72 is arranged only at both ends of the length direction of the evaporation porous bottom plate 71, and the evaporation side plate 72 is not arranged at both 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 plate to form the evaporation flow uniformizing cavity from both sides of the width direction of the evaporation side plate 72. The overall length of the evaporation flow uniformizing 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 distance between the baffles at both ends of the plurality of 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 uniformizing device 7 is integrated with the flow uniformizing device 6, and the stability of the whole is enhanced.

[0079] The working process of the refrigeration system of the present application is briefly described as follows.

[0080] 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 draws gaseous refrigerant from the evaporator 1 through the gas outlet 15 of the evaporator 1, and the gaseous refrigerant enters the condensation flow uniformizing cavity through the second inlet 24 at the top of the condenser 2, then uniformly 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 liquid refrigerant flowing out from the second outlet 25 at the bottom of the condenser 2, and enters the evaporation flow uniformizing cavity through the second liquid inlet 14 of the evaporator 1. Among them, the second cooling liquid B is cooled by absorbing the heat dissipation heat of the natural cold source through the external water cooling device, such as a cooling tower, and then flows back into the second heat exchange tube 21 to cool the refrigerant.

[0081] The refrigerant, after entering the evaporating uniform flow cavity through the second liquid inlet 14 of the evaporator 1, is uniformly exchanged with the first heat exchange tube 11 through the evaporating porous bottom plate 71, forming gaseous refrigerant, and flowing out through the gas outlet 15. In the process of the refrigerant changing from liquid refrigerant to gaseous refrigerant, the temperature of the first cooling liquid A in the first heat exchange tube 11 is absorbed, so that the temperature of the first cooling liquid A is reduced and the machine room is cooled.

[0082] 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 uniformly drops onto the second heat exchange tube 21 in the condensing uniform flow cavity to exchange heat and be cooled. The second cooling liquid B in the second heat exchange tube 21 is heated after absorbing the heat of the liquid refrigerant, and then flows to the water cooling tower to absorb the cold of the natural cold source to be cooled and re-cool the refrigerant. 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 deflected between the multiple baffles 61. In the process of deflection, the heat exchange time and heat exchange distance with the first heat exchange tube 11 are prolonged, so as to sufficiently 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 and the machine room is cooled. At the same time, the temperature of the refrigerant is increased in the process of heat exchange, and flows from the liquid outlet 13 to the condenser 2 to be cooled.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent replacements; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application.

Claims

1. A refrigeration system characterized by, The refrigeration system comprises: an evaporator (1); a condenser (2); a liquid pump (3) arranged between the evaporator (1) and the condenser (2) and used to drive the refrigerant to circulate between the evaporator (1) and the condenser (2); and a compressor (4) arranged between the evaporator (1) and the condenser (2) and used to drive the refrigerant to circulate between the evaporator (1) and the condenser (2), wherein 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 in liquid form between the evaporator (1) and the condenser (2) to realize non-phase-change 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 liquid form and change into gas to realize phase-change refrigeration.

2. The refrigeration system of claim 1, wherein, 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 of claim 2, wherein, 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 is connected with the compressor (4), and the liquid outlet is connected with the liquid pump (3), in the first refrigeration mode, the refrigerant in liquid form flows from the condenser (2) into the evaporator (1) and then flows to the liquid pump (3) through the liquid outlet, and in the second refrigeration mode, the refrigerant in liquid form changes into gas after flowing from the condenser (2) into the evaporator (1) and then flows to the compressor (4) through the gas outlet.

4. The refrigeration system of claim 1, wherein, The evaporator (1) is internally provided with first heat exchange pipes (11) for flowing of a first cooling liquid, the refrigerant in the evaporator (1) exchanges heat with the first cooling liquid through the first heat exchange pipes (11) to reduce the temperature of the first cooling liquid (A), and the first cooling liquid (A) is used for cooling a machine room; the condenser (2) is internally provided with second heat exchange pipes (21) for flowing of a second cooling liquid (B), the refrigerant in the condenser (2) exchanges heat with the second cooling liquid (B) through the second heat exchange pipes (21) to reduce the temperature of the refrigerant, and the second cooling liquid (B) is configured to exchange heat with an outside natural cold source.

5. The refrigeration system of claim 4, wherein, The condenser (2) comprises an inlet arranged at the top of the condenser (2), and the refrigeration system further comprises a condensing flow uniformizing device (5), which comprises a condensing porous bottom plate (51) and a condensing side plate (52) arranged at the edge of the condensing porous bottom plate (51), and is arranged at the top area in the condenser (2), and the condensing porous bottom plate (51) and the condensing side plate (52) and the inner wall of the condenser (2) form a condensing flow uniformizing cavity, and the second heat exchange pipe (21) is arranged at the lower side of the condensing flow uniformizing device (5), so that the refrigerant discharged by the evaporator (1) enters the condensing flow uniformizing cavity through the inlet of the condenser (2) and exchanges heat with the condensing porous bottom plate (51) and the second heat exchange pipe (21).

6. The refrigeration system of claim 4 wherein, The evaporator (1) comprises a first liquid inlet (12) and a liquid outlet (13) arranged at the two ends of the bottom of the evaporator (1) respectively, the liquid outlet (13) is connected with the inlet of the liquid pump (3), the outlet of the liquid pump (3) is connected with the inlet of the condenser (2), and the refrigeration system further comprises a baffle device (6) arranged in the evaporator (1), which is arranged at the bottom area in the evaporator (1), and the baffle device (6) comprises a plurality of baffles (61) arranged alternately in height, a plurality of the baffles (61) are arranged at intervals between the first liquid inlet (12) and the liquid outlet (13), and the first heat exchange pipe (11) is inserted between a plurality of the baffles (61) along the arrangement direction of the plurality of baffles (61), 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 a plurality of the baffles (61).

7. The refrigeration system of claim 6, wherein, The plurality of baffles (61) comprise a plurality of upper baffles (61a) and a plurality of lower baffles (61b) arranged alternately, 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.

8. The refrigeration system of claim 7, wherein, The baffle 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, both ends of the upper connecting rod (62) and the lower connecting rod (63) are connected with the inner wall of the evaporator (1), the plurality of upper baffles (61a) are arranged on the upper connecting rod (62), the plurality of lower baffles (61b) are arranged on the lower connecting rod (63), the upper connecting rod (62) is higher than the lower baffles (61b), and the lower connecting rod (63) is lower than the upper baffles (61a).

9. The refrigeration system of claim 7, wherein, In the arrangement direction, the baffle plates at both ends of the plurality of baffle plates (61) are configured as the lower baffle plates (61b), and the baffle plates adjacent to the lower baffle plates (61b) are configured as the upper baffle plates (61a).

10. The refrigeration system of claim 6, wherein, The baffle plates at both ends of the plurality of baffle plates (61) are respectively adjacent to the first liquid inlet (12) and the liquid outlet (13).

11. The refrigeration system of claim 4 wherein, The refrigeration system further comprises an evaporation flow uniformizing device (7), the evaporation flow uniformizing device (7) comprises 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 uniformizing device (7) is buckled at the bottom area in the evaporator (1) to form an evaporation flow uniformizing cavity with the evaporation porous bottom plate (71), the evaporation side plate (72) and the inner wall of the evaporator (1), the first heat exchange pipe (11) is arranged on the upper side of the evaporation flow uniformizing device (7), the evaporator (1) further comprises 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 with the outlet at the bottom of the condenser (2), the gas outlet (15) is connected with the inlet of the compressor (4), the outlet of the compressor (4) is connected with the inlet of the condenser (2), in the second refrigeration mode, the compressor (4) makes the refrigerant enter the evaporation flow uniformizing cavity through the second liquid inlet (14) from the condenser (2) and exchange heat with the first heat exchange pipe (11) through the evaporation porous bottom plate (71), and then flows to the inlet of the condenser (2) through the gas outlet (15).

12. The refrigeration system of claim 11, wherein, 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 (13) is connected with the inlet of the liquid pump (3), the outlet of the liquid pump (3) is connected with the inlet of the condenser (2), the refrigeration system further comprises a plurality of baffle plates (61), the plurality of baffle plates (61) are arranged at intervals between the first liquid inlet (12) and the liquid outlet (13), in the first refrigeration mode, the refrigerant is deflected between the plurality of baffle plates (61) in the process of flowing from the first liquid inlet (12) to the liquid outlet (13), the evaporation flow uniformizing device (7) is arranged at the bottom of the plurality of baffle plates (61), the evaporation side plate (72) comprises two side sealing plates 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 with the baffle plates at both ends of the plurality of baffle plates (61).

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