Cooling device and compressor structure

Abstract

The utility model provides a cooling device and a compressor structure, and the cooling device comprises a cooling box body which is provided with a containing cavity used for containing fluid to be cooled; the low-position heat exchange pipe comprises a low-position liquid inlet pipe penetrating into the containing cavity and a low-position liquid outlet pipe penetrating out of the containing cavity. The high-position heat exchange pipe comprises a high-position liquid inlet pipe penetrating into the containing cavity and a high-position liquid outlet pipe penetrating out of the containing cavity. The high-position liquid inlet pipe is located above the low-position liquid inlet pipe, and the high-position liquid outlet pipe is located above the low-position liquid outlet pipe. The heat exchange component is connected with the low-position liquid inlet pipe and the high-position liquid inlet pipe so as to introduce a refrigerant into the low-position liquid inlet pipe and the high-position liquid inlet pipe; the heat exchange component is connected with the low-position liquid outlet pipe and the high-position liquid outlet pipe so that refrigerants flowing out of the low-position liquid outlet pipe and the high-position liquid outlet pipe can flow to the heat exchange component. The cooling device solves the technical problem that the refrigerant flow of a main path is reduced when the oil tank is cooled in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and particularly relates to a cooling device and a compressor structure. Background Art

[0002] A heat pump is an energy-efficient device that makes full use of low-grade heat energy. The heat pump transfers heat from a low-temperature heat source to a high-temperature heat source by doing work. The heat pump aims to obtain the heat of the high-temperature heat source, which is the same as the refrigeration principle. The heat pump can consume only a small amount of net reverse cycle work to obtain a large amount of heat supply, and can effectively utilize the difficult-to-apply low-grade heat energy to achieve the purpose of energy conservation. The compressor is a key component of the heat pump unit and undertakes the important functions of compressing and transporting the refrigerant.

[0003] The high-temperature working condition of the heat pump unit itself poses a challenge to the stable operation of the compressor. The high-temperature refrigerant inside the compressor spontaneously conducts heat and convects heat to other components inside the compressor, indirectly increasing the temperature of the lubricating oil flowing to the compressor bearing. At a higher temperature, the viscosity of the lubricating oil decreases, the rigidity of the oil film between the bearing and the rotor decreases, and the heat carried away by the lubricating oil during the lubrication process also changes, resulting in adverse phenomena such as too high temperatures of the bearing and the shaft, contact wear between the bearing and the shaft, and instability of the shafting. This adverse effect also limits the process upper limit of the heat pump compressor, and further restricts the development of the compressor in the industrial field with larger heating capacity requirements.

[0004] In order to solve the problem of too high oil supply temperature of the heat pump compressor bearing, most existing heat pumps use an oil cooler for cooling. A high-pressure liquid refrigerant is led from the bottom of the condenser into the cavity where the oil cooler is located. Through the gaps and around the oil cooler, the lubricating oil continuously flows inside the oil cooler and absorbs the cold energy of the refrigerant to achieve the purpose of reducing the oil temperature. However, under high-temperature working conditions, the temperature of the liquid refrigerant is relatively high, and the cooling effect on the lubricating oil is not ideal. At the same time, a bypass pipe needs to be led out from the main refrigerant circuit to specifically cool the lubricating oil, reducing the main refrigerant flow rate and having an adverse effect on energy efficiency reduction.

[0005] Therefore, the prior art needs to be further developed. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the above technical deficiencies and provide a cooling device and a compressor structure to solve the technical problem that the main refrigerant flow rate is reduced during the cooling of the lubricating oil in the related art.

[0007] To achieve the above technical objectives, the present utility model adopts the following technical solutions: A cooling device is provided, including: a cooling box body, the cooling box body having a receiving cavity for receiving a fluid to be cooled; a low-position heat exchange tube, the low-position heat exchange tube including a low-position liquid inlet tube penetrating into the receiving cavity and a low-position liquid outlet tube penetrating out of the receiving cavity; a high-position heat exchange tube, the high-position heat exchange tube including a high-position liquid inlet tube penetrating into the receiving cavity and a high-position liquid outlet tube penetrating out of the receiving cavity; the high-position liquid inlet tube is located above the low-position liquid inlet tube, and the high-position liquid outlet tube is located above the low-position liquid outlet tube; a heat exchange component, the heat exchange component being connected to both the low-position liquid inlet tube and the high-position liquid inlet tube to introduce a refrigerant into the low-position liquid inlet tube and the high-position liquid inlet tube; the heat exchange component is connected to both the low-position liquid outlet tube and the high-position liquid outlet tube to enable the refrigerant flowing out of the low-position liquid outlet tube and the high-position liquid outlet tube to flow to the heat exchange component.

[0008] Further, there are multiple high-position liquid inlet tubes, and the multiple high-position liquid inlet tubes are arranged at intervals in the vertical direction; and / or, there are multiple high-position liquid outlet tubes, and the multiple high-position liquid outlet tubes are arranged at intervals in the vertical direction; and / or, there are multiple low-position liquid inlet tubes, and the multiple low-position liquid inlet tubes are arranged at intervals in the vertical direction; and / or, there are multiple low-position liquid outlet tubes, and the multiple low-position liquid outlet tubes are arranged at intervals in the vertical direction.

[0009] Further, the cooling device includes a circulation pipe, the circulation pipe being arranged in the receiving cavity, and the circulation pipe including: a low-position circulation pipe, one end of the low-position circulation pipe being connected to the low-position liquid inlet tube, and the other end of the low-position circulation pipe being connected to the low-position liquid outlet tube; a high-position circulation pipe, one end of the high-position circulation pipe being connected to the high-position liquid inlet tube, and the other end of the high-position circulation pipe being connected to the high-position liquid outlet tube.

[0010] Further, the circulation pipe includes: straight pipe segments, there are multiple straight pipe segments, and the multiple straight pipe segments are arranged at intervals in the vertical direction; elbow pipes, one end of an elbow pipe being connected to one straight pipe segment, and the other end of the elbow pipe being connected to another straight pipe segment.

[0011] Further, the elbow pipe extends along an arc, and the angle between the plane where the arc is located and the horizontal plane is 45°.

[0012] Further, the cooling device includes a baffle plate, and straight pipe segments are arranged on both opposite sides of the baffle plate; two straight pipe segments located on opposite sides of the baffle plate are connected by an elbow pipe.

[0013] Further, there are multiple baffle plates, and the multiple baffle plates are arranged at intervals; and / or, the baffle plate extends in the vertical direction.

[0014] Further, the cooling device includes: an inlet oil pipe connected to the cooling box body and communicating with the accommodating cavity; an oil outlet hole provided on the cooling box body and communicating with the accommodating cavity; wherein, baffle plates are provided on opposite side walls of the accommodating cavity, and a flow passage is formed between at least two baffle plates, so that the fluid entering from the inlet oil pipe flows out from the oil outlet hole after passing through the flow passage.

[0015] Further, the inlet header, the high-level liquid inlet pipe and the low-level liquid inlet pipe are all connected to the inlet header; and / or, the outlet header and the liquid collecting pipe, the high-level liquid outlet pipe and the low-level liquid outlet pipe are all connected to the outlet header through the liquid collecting pipe.

[0016] Further, the cooling device includes: an inlet air pipe, one end of the inlet air pipe is connected to the compressor to introduce gas from the compressor, and the other end of the inlet air pipe is communicated with both the low-level liquid inlet pipe and the high-level liquid inlet pipe; a liquid guiding pipe, one end of the liquid guiding pipe is connected to the heat exchange component, and the other end of the liquid guiding pipe is connected to the inlet air pipe.

[0017] Further, the cooling device further includes: a cooling outlet pipe communicated with both the low-level liquid outlet pipe and the high-level liquid outlet pipe; a gas-liquid separator, the inlet of the gas-liquid separator is connected to the cooling outlet pipe; a return air pipe, one end of the return air pipe is communicated with the outlet of the gas-liquid separator, and the other end of the return air pipe is communicated with the suction port of the compressor; a return liquid pipe, one end of the return liquid pipe is communicated with the outlet of the gas-liquid separator, and the other end of the return liquid pipe is connected to the heat exchange component.

[0018] A compressor structure includes the above-mentioned cooling device, and the compressor structure further includes a compressor body, and the cooling box body of the cooling device is arranged on the compressor body.

[0019] Beneficial effects:

[0020] The cooling device of the present utility model introduces the liquid refrigerant in the low-pressure, low-temperature and low-level state from the evaporator into the heat exchange tube assembly 200 in the cooling box body. The liquid refrigerant is heated and vaporized in the heat exchange tube assembly 200 to absorb the heat on the oil side. By setting the heat exchange tube assembly 200 as a multi-pass tube with high and low levels, when the cooling requirement is low, the refrigerant can only enter the low-level liquid inlet pipe for heat exchange, so that when the oil supply to the high-level cooling box body is insufficient, the oil can also enter the low-level liquid inlet pipe for heat exchange, solving the technical problem in the prior art that the main path refrigerant flow rate is reduced when the fuel tank is cooled. Description of the drawings

[0021] Figure 1 is a schematic structural diagram of the heat exchange tube assembly of the cooling device adopted in the embodiment of the present utility model;

[0022] Figure 2 is a schematic structural diagram of the liquid collecting pipe of the cooling device adopted in the embodiment of the present utility model;

[0023] Figure 3 It is a schematic structural diagram of the accommodation cavity of the cooling device adopted in the embodiment of the present utility model;

[0024] Figure 4 It is a schematic structural diagram of an embodiment of the heat exchange tube assembly of the cooling device adopted in the embodiment of the present utility model;

[0025] Figure 5 It is a schematic structural diagram of the cooling inlet pipeline assembly of the cooling device provided in the embodiment of the present utility model;

[0026] Figure 6 It is a schematic structural diagram of the cooling outlet pipeline assembly of the cooling device provided in the embodiment of the present utility model;

[0027] Figure 7 It is a schematic structural diagram of the compressor provided in the embodiment of the present utility model.

[0028] Among them, the above-mentioned drawings include the following reference numerals:

[0029] 100, cooling box body; 110, accommodation cavity; 101, oil outlet hole; 102, baffle plate; 103, transition fillet; 104, inlet pipe;

[0030] 200, heat exchange tube assembly; 1, low-position heat exchange tube; 11, low-position liquid inlet pipe; 12, low-position liquid outlet pipe; 2, high-position heat exchange tube; 21, high-position liquid inlet pipe; 211, fixing plate; 212, straight pipe section; 213, pipe hole; 2111, pipe hole; 213, elbow pipe; 22, high-position liquid outlet pipe; 201, outlet header; 202, fourth branch outlet pipe; 203, third branch outlet pipe; 204, second branch outlet pipe; 205, first branch outlet pipe; 206, fourth branch inlet pipe; 207, inlet header; 208, first branch inlet pipe; 209, second branch inlet pipe; 210, third branch inlet pipe;

[0031] 300, cooling inlet pipeline assembly; 3, liquid collecting pipe; 301, inlet gas pipe; 302, suction chamber; 303, nozzle; 304, throat pipe; 305, diffuser pipe; 306, liquid guiding pipe; 307, sight glass;

[0032] 400, cooling outlet pipeline assembly; 40, cooling outlet pipeline assembly; 401, gas-liquid separator; 402, cooling outlet pipe; 403, return gas pipe; 404, return liquid pipe; 405, throttle pipe; 51, low-position flow pipe; 52, high-position flow pipe; 500, compressor body. Detailed implementation manners

[0033] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0034] Referring to Figures 1 to 7 , according to an embodiment of the present invention, a cooling device is provided, including: a cooling box body 100 having a receiving cavity 110 for receiving a fluid to be cooled; a low-position heat exchange tube 1 including a low-position liquid inlet tube 11 penetrating into the receiving cavity 110 and a low-position liquid outlet tube 12 penetrating out of the receiving cavity 110; a high-position heat exchange tube 2 including a high-position liquid inlet tube 21 penetrating into the receiving cavity 110 and a high-position liquid outlet tube 22 penetrating out of the receiving cavity 110; the high-position liquid inlet tube 21 is located above the low-position liquid inlet tube 11, and the high-position liquid outlet tube 22 is located above the low-position liquid outlet tube 12; a heat exchange component connected to both the low-position liquid inlet tube 11 and the high-position liquid inlet tube 21 to introduce a refrigerant into the low-position liquid inlet tube 11 and the high-position liquid inlet tube 21; the heat exchange component is connected to both the low-position liquid outlet tube 12 and the high-position liquid outlet tube 22 to enable the refrigerant flowing out of the low-position liquid outlet tube 12 and the high-position liquid outlet tube 22 to flow to the heat exchange component.

[0035] Aiming at the problem of shafting instability caused by too high oil supply temperature of the heat pump compressor bearing, a self-circulating oil cooling device based on refrigerant injection cooling and phase change refrigeration is proposed. The low-pressure, low-temperature and low-state liquid refrigerant is introduced from the evaporator into the heat exchange tube assembly 200 in the cooling box body 100. The heat exchange tube assembly 200 includes a high-position heat exchange tube 2 and a low-position heat exchange tube 1. The liquid refrigerant is heated and vaporized in the heat exchange tube assembly 200 to absorb the heat on the oil side. By setting the heat exchange tube assembly 200 as a multi-pass tube with high and low positions, when the cooling requirement is low, the refrigerant can only enter the low-position liquid inlet tube 11 for heat exchange, so that when the oil supply in the high-position cooling box body 100 is insufficient, the oil can also enter the low-position liquid inlet tube 11 for heat exchange, solving the technical problem of reducing the main path refrigerant flow rate in the prior art when the fuel tank is cooled.

[0036] In the cooling device of this embodiment, referring to Figure 1 、 Figure 2, there are multiple high-level liquid inlet pipes 21, and the multiple high-level liquid inlet pipes 21 are arranged at intervals in the vertical direction; and / or, there are multiple high-level liquid outlet pipes 22, and the multiple high-level liquid outlet pipes 22 are arranged at intervals in the vertical direction; and / or, there are multiple low-level liquid inlet pipes 11, and the multiple low-level liquid inlet pipes 11 are arranged at intervals in the vertical direction; and / or, there are multiple low-level liquid outlet pipes 12, and the multiple low-level liquid outlet pipes 12 are arranged at intervals in the vertical direction. With the above settings, the number of the high-level liquid inlet pipes 21, high-level liquid outlet pipes 22, low-level liquid inlet pipes 11 and low-level liquid outlet pipes 12 is increased, so that the coolant flows from low to high in sequence, increasing the grading of the refrigerant flow pipeline in the vertical direction and making the cooling grading more refined.

[0037] In the cooling device of this embodiment, refer to Figures 1 to 3 , the cooling device includes a flow pipe, the flow pipe is arranged in the accommodation cavity 110, and the flow pipe includes: a low-level flow pipe 51, one end of the low-level flow pipe 51 is connected to the low-level liquid inlet pipe 11, and the other end of the low-level flow pipe 51 is connected to the low-level liquid outlet pipe 12; a high-level flow pipe 52, one end of the high-level flow pipe 52 is connected to the high-level liquid inlet pipe 21, and the other end of the high-level flow pipe 52 is connected to the high-level liquid outlet pipe 22.

[0038] Specifically, the function of the flow pipe is to contact the oil liquid in the accommodation cavity 110, so as to exchange heat for the oil liquid. The flow pipe corresponds to the liquid inlet pipe and the liquid outlet pipe and is also distributed from low to high. In this way, when the amount of refrigerant introduced is small, it can also ensure that refrigerant flows into the flow pipe, so as to complete the heat exchange function.

[0039] Refer to Figure 4 , in the cooling device of this embodiment, the flow pipe includes: a straight pipe section 212, there are multiple straight pipe sections 212, and the multiple straight pipe sections 212 are arranged at intervals in the vertical direction; an elbow pipe 213, one end of the elbow pipe 213 is connected to a straight pipe section 212, and the other end of the elbow pipe 213 is connected to another straight pipe section 212. In this way, a tortuous flow pipe is formed in the accommodation cavity 110, thereby improving the heat exchange efficiency.

[0040] In the cooling device of this embodiment, the elbow pipe 213 extends along an arc, and the angle between the plane where the arc is located and the horizontal plane is 45°. In this way, the distribution of the flow pipeline in the horizontal and vertical directions is more uniform, making the heat exchange more efficient.

[0041] Refer to Figure 3, in the cooling device of this embodiment, the cooling device includes a baffle plate 102, and straight pipe sections 212 are arranged on both opposite sides of the baffle plate 102; two straight pipe sections 212 located on opposite sides of the baffle plate 102 are connected by an elbow pipe 213. By arranging the baffle plate 102, when the oil liquid in the cooling box body 100 flows, the baffle plate 102 can produce a flow disturbance effect on the oil liquid, thereby increasing the flow distance of the oil liquid and enabling the oil liquid to fully exchange heat with the flow pipe.

[0042] See Figure 3 , in the cooling device of this embodiment, there are multiple baffle plates 102, and the multiple baffle plates 102 are arranged at intervals; and / or, the baffle plate 102 extends in the vertical direction. With the above settings, the flow disturbance effect of the baffle plate 102 can be improved.

[0043] See Figure 3 , in the cooling device of this embodiment, the cooling device includes: an inlet oil pipe 104, which is connected to the cooling box body 100, and the inlet oil pipe 104 communicates with the accommodation cavity 110; an oil outlet hole 101, which is arranged on the cooling box body 100, and the oil outlet hole 101 communicates with the accommodation cavity 110; wherein, baffle plates 102 are arranged on both opposite side walls of the accommodation cavity 110, and a flow passage is formed between at least two baffle plates 102, so that the fluid entering from the inlet oil pipe 104 flows out through the flow passage and then through the oil outlet hole 101. In this way, a bent channel is formed by multiple baffle plates 102. When the oil liquid flows in the channel, it can flow along the extending direction of the flow pipe, thereby fully exchanging heat.

[0044] See Figure 2 , Figure 4 , in the cooling device of this embodiment, an inlet header 207, a high-position liquid inlet pipe 21 and a low-position liquid inlet pipe 11 are all connected to the inlet header 207; and / or, an outlet header 201 and a liquid collecting pipe 3, a high-position liquid outlet pipe 22 and a low-position liquid outlet pipe 12 are all connected to the outlet header 201 through the liquid collecting pipe 3. In this way, the pipelines are centrally connected through the inlet header 207 and the outlet header 201, which is convenient for the cooling device to be connected to external equipment, thereby facilitating the circulation of the refrigerant.

[0045] In the cooling device of this embodiment, the cooling device includes: an inlet gas pipe 301, one end of the inlet gas pipe 301 is connected to the compressor to introduce gas from the compressor, and the other end of the inlet gas pipe 301 communicates with both the low-position liquid inlet pipe 11 and the high-position liquid inlet pipe 21; a liquid guiding pipe 306, one end of the liquid guiding pipe 306 is connected to the heat exchange component, and the other end of the liquid guiding pipe 306 is connected to the inlet gas pipe 301.

[0046] Specifically, an ejector is used to introduce the liquid refrigerant in the low-pressure, low-temperature state from the evaporator into the heat exchange tube assembly 200 in the high-position oil tank. The liquid refrigerant is heated and vaporized in the heat exchange tube assembly 200 to absorb the heat on the oil side, effectively utilizing the refrigerant in the compressor.

[0047] In the cooling device of this embodiment, the cooling device further includes: a cooling outlet pipe 402, which is connected to both the low-position liquid outlet pipe 12 and the high-position liquid outlet pipe 22; a gas-liquid separator 401, whose inlet is connected to the cooling outlet pipe 402; a return air pipe 403, one end of which is connected to the outlet of the gas-liquid separator 401, and the other end of the return air pipe 403 is connected to the suction port of the compressor; a return liquid pipe 404, one end of which is connected to the outlet of the gas-liquid separator 401, and the other end of the return liquid pipe 404 is connected to the heat exchange component. In this way, the refrigerant working medium that has completed heat exchange gathers and flows out of the heat exchange tube assembly 200. After gas-liquid separation, the gaseous refrigerant returns to the compressor suction port, and the liquid refrigerant returns to the evaporator after throttling to complete the cycle, so that the refrigerant in the cooling device can continuously carry out heat exchange.

[0048] The compressor structure of this embodiment includes the above cooling device. The compressor structure further includes a compressor body 500, and the cooling box 100 of the cooling device is arranged on the compressor body 500.

[0049] Specifically, the cooling box 100 is arranged on the upper part of the compressor body 500, and it is easier for the refrigerant to flow in through different inlet pipes, enabling the refrigerant to be better stratified in the heat exchange tube assembly 200 of the cooling structure.

[0050] Embodiment 1

[0051] The cooling device of this embodiment uses an ejector to introduce the liquid refrigerant in the low-pressure, low-temperature state from the evaporator into the heat exchange tube assembly 200 in the cooling box 100. The liquid refrigerant is heated and vaporized in the heat exchange tube assembly 200 to absorb the heat on the oil side. By setting multiple tube passes for the heat exchange tube assembly 200 and arranging baffle plates in the cooling box 100 to strengthen the phase change heat exchange between the refrigerant and the oil, the temperature in the oil tank is effectively reduced. The refrigerant working medium that has completed heat exchange gathers and flows out of the heat exchange tube assembly 200. After gas-liquid separation, the gaseous refrigerant returns to the compressor suction port, and the liquid refrigerant returns to the evaporator after throttling to complete the cycle.

[0052] The structural schematic diagram of the cooling device of this embodiment is as Figure 4As shown in the figure, it mainly consists of four components: a cooling box body 100, a heat exchange tube assembly 200, a cooling inlet pipeline assembly 300, and a cooling outlet pipeline assembly 400. It can be understood that the cooling box body 100 is an emergency cooling device for the compressor bearings, generally arranged on the upper side of the compressor, used to continue supplying oil to the bearings when the compressor stops running due to power failure, preventing bearing wear. When the compressor is running normally, it serves as an external oil tank and is an important component for continuously supplying oil to the compressor. The heat exchange tube assembly 200 is arranged on the side of the cooling box body 100 and is fastened by screws. The cooling inlet pipeline assembly 300 and the cooling outlet pipeline assembly 400 are respectively connected to the inlet pipeline and the outlet pipeline of the heat exchange tube assembly 200.

[0053] Figure 2 It is a schematic structural diagram of the heat exchange tube assembly 200. As Figure 1 and Figure 2 shown, the heat exchange tubes of the heat exchange tube assembly 200 are distributed in 4 columns in the vertical direction. Fastener through holes are opened on the fixing plate 211 to play a role in installation and fixation. Tube holes 2111 are opened on the fixing plate 211 for the heat exchange tubes to pass through the fixing plate 211 for installation. The aperture of the tube holes 2111 is slightly larger than the diameter of the heat exchange tubes to reserve a space for welding fluid filling. The heat exchange tubes are connected to the fixing plate 211 by welding to achieve sealing between the heat exchange tubes and the tube holes 2111. The inlet header 207 is the starting inlet of the heat exchange tube assembly 200. The low-temperature refrigerant drawn from the condenser flows into the heat exchange tube assembly 200 from the inlet header 207. In this embodiment, one side of the inlet header 207 is connected to the cooling inlet pipeline assembly 300, and the other side is connected to 4 branch inlet pipelines, namely the first branch inlet pipe 208, the second branch inlet pipe 209, the third branch inlet pipe 210, and the fourth branch inlet pipe 206. The inlet header 207 is cylindrical, and its cross-sectional area is not less than the total cross-sectional area of the 4 branch pipelines, so as to ensure that there is sufficient refrigerant in each branch pipeline.

[0054] It should be noted that the number of branch pipelines in this embodiment includes but is not limited to 4, and the number of branch pipelines is determined according to the shape and size of the cooling box body 100. Correspondingly, one side of the outlet header 201 is connected to the cooling outlet pipeline assembly 400, and the other side is connected to 4 branch outlet pipelines, namely the first branch outlet pipe 205, the second branch outlet pipe 204, the third branch outlet pipe 203, and the fourth branch outlet pipe 202. It can be understood that the first branch inlet pipe 208 and the first branch outlet pipe 205 are the inlet pipeline and the outlet pipeline of the same heat exchange tube, and the same is true for the other 3 branches.

[0055] It should be noted that the 4 branches in this embodiment can be divided into 3 high-position heat exchange tubes 2 and 1 low-position heat exchange tube, or 1 low-position heat exchange tube and 3 low-position heat exchange tubes, etc., as long as the pipelines have a high-low distinction.

[0056] In particular, the pipelines of different branches are staggeredly distributed in the vertical direction with the ground as the reference. The first branch inlet pipe 208 is the pipeline with the lowest vertical position among the 4 inlet pipes. Correspondingly, the first branch outlet pipe 205 is also the pipeline with the lowest vertical position among the 4 outlet pipes and is higher than the first branch inlet pipe 208. The adjacent straight pipe segments 212 in the middle part of this branch pipeline are connected through an elbow pipe 213. The adjacent straight pipe segments 212 are not in the same vertical plane in space, but are obliquely distributed at 45° to the vertical plane. The vertical heights of the straight pipe segments 212 and the elbow pipe 213 of the first branch are not lower than the first branch inlet pipe 208 and not higher than the first branch outlet pipe 205. If the spatial distribution of the heat exchange tube assembly 200 is evenly divided into 4 regions by vertical height, the pipelines of the first branch are mainly distributed in the region with the lowest height. Similarly, the pipelines of the second branch and the third branch are mainly distributed in the region with the middle height, and the fourth branch is mainly distributed in the region with the highest height. The beneficial effect of this pipeline distribution is to perform appropriate cooling according to the actual oil content in the cooling box 100. For example, when the actual oil content in the cooling box 100 is relatively low, the oil level is low and lower than the first branch outlet pipe 205, and only the first branch heat exchange is used to prevent the oil temperature from being too low due to excessive cooling; when the actual oil content in the cooling box 100 is high, the oil level is high and higher than the fourth branch outlet pipe 202, and the 4 branches are cooled synchronously to ensure efficient cooling and prevent the oil temperature from being too high due to insufficient cooling capacity.

[0057] Figure 3 It is a top view of the sectional structure of the heat exchange tube assembly 200 and the cooling box 100. As Figure 1 and Figure 3As shown, an oil inlet pipe 104 is provided at a relatively high position on the side of the cooling box body 100. When the compressor is running normally, the external oil supply circuit continuously supplies oil into the cooling box body 100 from the oil inlet pipe 104. In this embodiment, the structure of the external oil circuit is not limited and patented, and will not be elaborated here. A baffle plate 102 is provided inside the cooling box body 100. The baffle plate 102 is a thin-walled rectangular flat plate structure extending inward from the inner wall of the cooling box body 100 itself. Adjacent baffle plates 102 extend from opposite inner wall surfaces respectively. The height of the baffle plate 102 is the same as the height of the inner cavity of the cooling box body 100, and the extending length of the baffle plate 102 is less than the length of the inner cavity of the cooling box body 100. After the heat exchange tube assembly 200 is installed in the cooling box body 100, from the perspective of the top of the cooling box body 100, the baffle plate 102 is located between two adjacent straight pipe sections 212. The thickness of the baffle plate 102 is slightly less than the gap between two adjacent straight pipe sections 212. The number of rows of heat exchange tubes of the heat exchange tube assembly 200 is associated with the number of baffle plates 102. In this embodiment, the heat exchange tubes of the heat exchange tube assembly 200 are distributed in 4 rows in the vertical direction, and there are 3 gap spaces between each row. Correspondingly, the number of baffle plates 102 is 3. The oil outlet hole 101 of the oil tank is provided at the bottom surface of the inner cavity of the cooling box body 100 on the side different from the oil inlet pipe 104. After the oil enters the cooling box body 100 from the oil inlet pipe 104, it needs to flow through the bent flow channel between the baffle plates 102 to reach the oil outlet hole 101 of the oil tank and then enter the compressor. The extending end of the baffle plate 102 has a transition fillet 103 feature. The transition fillet 103 is located near the elbow pipe 213, ensuring that the flow direction of the oil is smoothly transitioned when flowing near the elbow pipe 213, fully exchanging heat, and not forming local eddies to affect heat exchange.

[0058] Figure 4 It is a schematic structural diagram of the cooling inlet pipe assembly. As Figure 1 and Figure 4As shown in the figure, the gaseous refrigerant with a relatively high pressure takes in gas from the internal space after the compressor compresses the refrigerant, and enters the ejector through the ejector intake pipe 301. The low-pressure liquid refrigerant takes in liquid from the evaporator and enters the ejector through the liquid drawn-in pipe 306. It can be understood that the height of the compressor relative to the ground is higher than that of the evaporator, and the low-pressure liquid refrigerant inside the evaporator cannot flow upward to the compressor against the gravity factor by itself. Under the action of the ejector, the low-pressure liquid refrigerant can flow into the cooling box 100. The liquid drawn-in pipe 306 is provided with a liquid level gauge 307 for observing the actual gas-liquid state of the low-pressure liquid refrigerant. The nozzle 303 is used to reduce the cross-sectional area of the ejector airflow, form a turbulent flow at the outlet, create a negative pressure in the suction chamber 302, so that the pressure in the suction chamber 302 is lower than the pressure of the refrigerant to be drawn. The refrigerant to be drawn continuously flows into the suction chamber 302. After the liquid and gaseous refrigerants are fully mixed in the throat 304, part of the kinetic energy is converted into pressure energy in the diffuser 305, and then flows into the heat exchange tube assembly 200. This patent does not limit the pipeline structure between the evaporator and the liquid drawn-in pipe 306, and the specific pipe shapes of pipelines such as the ejector intake pipe 301, and will not be elaborated here.

[0059] Figure 5 It is a schematic structural diagram of the cooling outlet pipeline assembly. As Figure 1 and Figure 5 shown, the gas-liquid two-phase refrigerant that has exchanged heat with oil in the pipe flows out from the heat exchange tube assembly 200 and then enters the cooling outlet pipe 402. The other end of the cooling outlet pipe 402 is connected to the gas-liquid separator 401. The gas-liquid separator 401 is a cylindrical structure with a hollow interior. The two end faces are arranged parallel to the ground. Welding holes are provided on the cylindrical surface for fixed connection with the cooling outlet pipe 402. The upper end face is communicated with the return air pipe 403, and the lower end face is communicated with the return liquid pipe 404. The gas-liquid two-phase refrigerant realizes gas-liquid separation in the gas-liquid separator 401. The gaseous refrigerant flows upward into the return air pipe 403 and then into the compressor suction port. The liquid refrigerant flows downward into the return liquid pipe 404, and then completes pressure reduction through the throttle pipe 405. The pressure is reduced to be consistent with the evaporation pressure, and then flows downward back to the evaporator to complete the cycle.

[0060] The working process and principle of the cooling device of this patent will be specifically described below with reference to the accompanying drawings.

[0061] The gaseous refrigerant with a relatively high pressure bypasses from the internal space after the compressor compresses the refrigerant, enters the ejector pipe through the ejector intake pipe 301, and introduces the low-pressure, low-temperature liquid refrigerant from the evaporator into the heat exchange tube assembly 200. The low-temperature liquid refrigerant absorbs the heat on the oil side during the flow in the pipeline of the heat exchange tube assembly 200 and undergoes a phase change to become gaseous, and the heat is taken away by the refrigerant in the form of latent heat. The flow of oil in the cooling box 100 shows a reciprocating zigzag flow due to the baffle 102, increasing the flow path of the oil and enhancing the heat exchange efficiency. The heat exchange tube assembly 200 has 4 branch cooling pipelines, and adaptively uses 1 to 4 cooling pipelines for cooling according to the actual oil level height in the cooling box 100. The gas-liquid two-phase refrigerant after heat exchange with the oil flows out from the heat exchange tube assembly 200 and is separated into gas and liquid in the gas-liquid separator 401. The gaseous refrigerant returns to the main circuit cycle from the compressor suction port and is recompressed, and the liquid refrigerant is throttled to reduce the pressure to the evaporation pressure and then returns to the evaporator to enter the main circuit cycle. Thus, the oil cooling of the cooling box 100 is realized through the self-circulation of successively taking gas and liquid in the main circuit cycle → cooling the oil tank → returning gas and liquid in the main circuit cycle. Since this bypass cycle actually reflects the heat transfer from the oil to the refrigerant in the evaporator, filling part of the heat supply from the external heat source to the circulation system in the original main circuit cycle, it has the effect of saving the heat supply of the working heat source of the heat pump unit system and is beneficial to improving the energy efficiency of the heat pump compressor.

[0062] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0063] Optionally, the specific examples in this embodiment can refer to the examples described in the above embodiments, and this embodiment will not be elaborated here.

[0064] The serial numbers of the above embodiments of this application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0065] In the above embodiments of this application, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0066] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A cooling device, characterized in that: include: A cooling box (100), wherein the cooling box (100) has a receiving cavity (110) for receiving a fluid to be cooled; A low-position heat exchange tube (1), the low-position heat exchange tube (1) comprising a low-position liquid inlet tube (11) penetrating into the accommodating cavity (110) and a low-position liquid outlet tube (12) penetrating out of the accommodating cavity (110); A high-position heat exchange tube (2), the high-position heat exchange tube (2) comprising a high-position liquid inlet pipe (21) penetrating into the accommodating cavity (110) and a high-position liquid outlet pipe (22) penetrating out of the accommodating cavity (110); the high-position liquid inlet pipe (21) is located above the low-position liquid inlet pipe (11), and the high-position liquid outlet pipe (22) is located above the low-position liquid outlet pipe (12); A heat exchange component, wherein the heat exchange component is connected to both the low-position liquid inlet pipe (11) and the high-position liquid inlet pipe (21) so as to allow refrigerant to flow into the low-position liquid inlet pipe (11) and the high-position liquid inlet pipe (21); and the heat exchange component is connected to both the low-position liquid outlet pipe (12) and the high-position liquid outlet pipe (22) so as to allow the refrigerant flowing out of the low-position liquid outlet pipe (12) and the high-position liquid outlet pipe (22) to flow to the heat exchange component.

2. The cooling device according to claim 1, characterized in that: There are a plurality of high-position liquid inlet pipes (21), and the plurality of high-position liquid inlet pipes (21) are arranged in sequence and spaced apart in the vertical direction; and / or, There are a plurality of high-position liquid outlet pipes (22), and the plurality of high-position liquid outlet pipes (22) are arranged in sequence and at intervals along the vertical direction; and / or, There are a plurality of the low-position liquid inlet pipes (11), and the plurality of the low-position liquid inlet pipes (11) are arranged in sequence and at intervals along the vertical direction; and / or, There are a plurality of low-position liquid outlet pipes (12), and the plurality of low-position liquid outlet pipes (12) are arranged in sequence and at intervals along the vertical direction.

3. The cooling device according to claim 1, characterized in that: The cooling device comprises a flow pipe, the flow pipe is arranged in the accommodating cavity (110), and the flow pipe comprises: A low-level circulation pipe (51), one end of the low-level circulation pipe (51) being connected to the low-level liquid inlet pipe (11), and the other end of the low-level circulation pipe (51) being connected to the low-level liquid outlet pipe (12); A high-position circulation pipe (52), one end of the high-position circulation pipe (52) is connected to the high-position liquid inlet pipe (21), and the other end of the high-position circulation pipe (52) is connected to the high-position liquid outlet pipe (22).

4. The cooling device according to claim 3, characterized in that: The flow tube comprises: A straight pipe section (212), wherein the straight pipe section (212) is multiple and the multiple straight pipe sections (212) are arranged at intervals along the vertical direction; An elbow pipe (213), one end of the elbow pipe (213) being connected to a straight pipe section (212), and the other end of the elbow pipe (213) being connected to another straight pipe section (212).

5. The cooling device according to claim 4, characterized in that: The elbow pipe (213) extends along an arc line, and the angle between the plane where the arc line is located and the horizontal plane is 45°.

6. The cooling device according to claim 4, characterized in that: The cooling device comprises a baffle (102), and the straight pipe sections (212) are arranged on opposite sides of the baffle (102); the two straight pipe sections (212) located on opposite sides of the baffle (102) are connected via an elbow pipe (213).

7. The cooling device according to claim 6, characterized in that: There are a plurality of baffles (102), and the plurality of baffles (102) are arranged at intervals; and / or the baffles (102) extend in a vertical direction.

8. The cooling device according to claim 6, characterized in that: The cooling device comprises: An oil inlet pipe (104) connected to the cooling box (100), the oil inlet pipe (104) being in communication with the accommodating chamber (110); An oil outlet hole (101) is provided on the cooling box (100), and the oil outlet hole (101) is in communication with the accommodating cavity (110); The baffle plates (102) are disposed on two opposite side walls of the accommodating chamber (110), and a flow channel is formed between at least two of the baffle plates (102), so that the fluid entering from the oil inlet pipe (104) passes through the flow channel and then flows out from the oil outlet hole (101).

9. The cooling device according to claim 1, characterized in that: The cooling device also includes: an inlet header (207), the high-position liquid inlet pipe (21) and the low-position liquid inlet pipe (11) both being connected to the inlet header (207); and / or, An outlet header (201) and a liquid collecting pipe (3), wherein the high-position liquid outlet pipe (22) and the low-position liquid outlet pipe (12) are both connected to the outlet header (201) via the liquid collecting pipe (3).

10. The cooling device according to claim 1, characterized in that: The cooling device comprises: An air intake pipe (301), one end of the air intake pipe (301) being connected to the compressor so as to introduce gas from the compressor, and the other end of the air intake pipe (301) being in communication with both the low-position liquid intake pipe (11) and the high-position liquid intake pipe (21); A liquid inlet pipe (306), one end of the liquid inlet pipe (306) being connected to the heat exchange component, and the other end of the liquid inlet pipe (306) being connected to the air inlet pipe (301).

11. The cooling device according to claim 10, characterized in that: The cooling device also includes: a cooling outlet pipe (402), the cooling outlet pipe (402) being in communication with both the low-position liquid outlet pipe (12) and the high-position liquid outlet pipe (22); A gas-liquid separator (401), wherein the inlet of the gas-liquid separator (401) is connected to the cooling outlet pipe (402); an air return pipe (403), one end of the air return pipe (403) being in communication with the outlet of the gas-liquid separator (401), and the other end of the air return pipe (403) being in communication with the air intake port of the compressor; A liquid return pipe (404), one end of the liquid return pipe (404) being in communication with the outlet of the gas-liquid separator (401), and the other end of the liquid return pipe (404) being connected to the heat exchange component.

12. A compressor structure, comprising the cooling device according to any one of claims 1 to 11, characterized in that: The compressor structure also includes a compressor body (500), and a cooling box (100) of the cooling device is arranged on the compressor body (500).

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