Condenser and self-circulation heating device applied to cold storage floor

Abstract

The application relates to the technical field of cold storage equipment, in particular to a condenser and a self-circulation heating device applied to a cold storage floor. The condenser comprises a shell provided with a condensing cavity, and the condensing cavity is provided with a pipe bundle assembly. The condenser further comprises a first cover, which is arranged on the port of the condensing cavity. The first cover comprises an inner cover and an outer cover sleeved on the outer side of the inner cover. A flow guide cavity is formed between the inner cover and the outer cover. An air inlet pipe, which is connected with the flow guide cavity, is arranged on the outer cover. The inner cover is provided with a communication port for connecting the flow guide cavity and the condensing cavity. The inner cover is provided with a flow-through cavity. A partition plate is arranged in the flow-through cavity. The flow-through cavity is divided into an outflow cavity and an inflow cavity by the partition plate. The outflow cavity and the inflow cavity are respectively connected with the pipe bundle assembly. The inner cover is provided with a liquid inlet pipe for connecting the inflow cavity and a second liquid outlet pipe for connecting the outflow cavity. The condenser can improve the stability of the heat exchange structure and the heat exchange efficiency.

Description

Technical Field

[0001] This application relates to the field of cold storage equipment technology, and in particular to a condenser and a self-circulating heating device for use in cold storage flooring. Background Technology

[0002] A cold storage facility is essentially a low-temperature freezing device, with freezing temperatures typically between -10°C and -30°C. A crucial component in the manufacturing process of a cold storage facility is the refrigeration unit, whose core components are the compressor and condenser. Specifically, the refrigeration unit includes a compressor, condenser, expansion valve, and evaporator. Low-temperature, low-pressure liquid refrigerant flows through the evaporator. The low-temperature, low-pressure liquid refrigerant absorbs heat, cooling the surrounding area to achieve refrigeration. After absorbing heat, the low-temperature, low-pressure liquid refrigerant vaporizes into a low-temperature, low-pressure gaseous refrigerant. The low-temperature, low-pressure gaseous refrigerant output from the evaporator is sent to the compressor, which compresses it to produce a high-temperature, high-pressure gaseous refrigerant. The high-temperature, high-pressure gaseous refrigerant produced by the compressor is then sent to the condenser, where a low-temperature coolant flows. The coolant absorbs the heat from the high-temperature, high-pressure gaseous refrigerant, causing it to release heat and condense into a medium-temperature, high-pressure liquid refrigerant. The medium-temperature, high-pressure liquid refrigerant produced by the condenser is then processed by a throttling expansion valve to transform into a low-temperature, low-pressure liquid refrigerant, which flows back to the evaporator for refrigeration. This cycle repeats continuously to achieve cold storage refrigeration.

[0003] The inventors discovered that during the refrigeration cycle, when the high-temperature and high-pressure gas generated by the compressor enters the condenser, the high-temperature and high-pressure gas will impact and erode the tube bundle assembly used for the flow of low-temperature coolant in the condenser. This will affect the structural stability of the tube bundle assembly, affect the flow and delivery of coolant by the tube bundle assembly, and reduce the heat exchange stability and heat exchange efficiency. The stronger the refrigeration operation of the cold storage, the more obvious this situation will be. Summary of the Invention

[0004] To improve heat exchange stability and efficiency, this application provides a condenser and a self-circulating heating device for cold storage flooring.

[0005] On the one hand, this application provides a condenser, which adopts the following technical solution: A condenser includes a housing, a condensation chamber inside the housing, and a tube bundle assembly inside the condensation chamber; It also includes a first cover, which is disposed on the port of the condensation chamber. The first cover includes an inner cover and an outer cover sleeved on the outside of the inner cover. A flow guide cavity is formed between the inner cover and the outer cover. An air inlet pipe communicating with the flow guide cavity is provided on the outer cover. A communication port for communicating with the flow guide cavity and the condensation chamber is provided on the inner cover. The inner cover has a flow cavity, and the inner cover has a partition plate inside the flow cavity. The partition plate divides the flow cavity into an outflow cavity and an inflow cavity. The outflow cavity and the inflow cavity are respectively connected to the tube bundle assembly. The inner cover has an inlet pipe for connecting the inflow cavity and a second drain pipe for connecting the outflow cavity.

[0006] Coolant and refrigerant, as heat exchange media, need to maintain continuous flow to improve heat exchange efficiency. A high flow synchronization rate between coolant and refrigerant contributes to improved heat exchange efficiency. However, in conventional condenser units, the inlet is vertically connected to the condensing chamber. When the high-temperature, high-pressure gas generated by the compressor enters the condenser, it directly impacts and vibrates the tube bundle assembly vertically, affecting its structural stability and the flow of coolant. This is more pronounced in cold storage operations with stronger cooling capacity. Furthermore, due to the large condenser shell diameter required for supply, the corresponding cavity (inflow and outflow cavity) between the first cover and the tube bundle assembly is also large. Low-temperature coolant needs to be collected in this cavity (inflow cavity) and then diverted into the tube bundle assembly for heat exchange, or high-temperature coolant needs to be collected in this cavity (outflow cavity) and then output to supply the heating pipe assembly. Increased cavity size means a larger fluid retention area, which reduces heat exchange efficiency.

[0007] Therefore, the condenser of this application is provided with a first cover, which has an inner cover and an outer cover structure. A guide cavity is formed between the inner cover and the outer cover, and the guide cavity is connected to the condensing cavity. The air inlet pipe of the condenser is connected to the guide cavity. In this way, the high-temperature and high-pressure gaseous refrigerant generated by the compressor first enters the guide cavity and then enters the condensing cavity. In the guide cavity, the high-temperature and high-pressure gaseous refrigerant flows along the cavity wall and is deflected. The high-temperature and high-pressure gaseous refrigerant can enter the condensing cavity in a manner parallel to the axial direction of the tube bundle assembly, which greatly reduces the impact and vibration problem. Moreover, in the guide cavity, the outer wall of the inner cover can act as an anti-impact wall for the high-temperature and high-pressure gaseous refrigerant. When the high-temperature and high-pressure gaseous refrigerant rushes into the guide cavity, it can help buffer and disperse the impact of the high-temperature and high-pressure gaseous refrigerant, thereby reducing the impact effect of the high-temperature and high-pressure gaseous refrigerant entering the condensing cavity.

[0008] Meanwhile, the guide cavity is located at the position of the first cap. When the high-temperature and high-pressure gaseous refrigerant flows in the guide cavity, it just surrounds the periphery of the cavity (inflow cavity and outflow cavity) at the position of the first cap. In other words, when the high-temperature and high-pressure gaseous refrigerant is in the guide cavity, it can exchange heat with the coolant collected in the cavity of the first cap, reduce the heat exchange problem in the stagnation area, and effectively improve the heat exchange efficiency.

[0009] Optionally, the inner wall of the outer cover is curved; the outer wall of the inner cover is curved.

[0010] The curved surfaces of the inner and outer covers create a U-shaped cross-section for the flow guide cavity. This U-shape improves the flow efficiency of the high-temperature, high-pressure gaseous refrigerant and reduces its retention within the cavity.

[0011] Optionally, the outer wall of the inner cover is provided with an arched portion, and the arched surface of the arched portion faces the air intake pipe.

[0012] The arched part has a large surface area, which can increase the contact area between the arched part and the high-temperature and high-pressure gaseous refrigerant. Moreover, the cross-sectional shape of the arched part is an arc-shaped structure, which has high stability and high surface tension. Therefore, it can effectively help disperse the impact of high-temperature and high-pressure gaseous refrigerant and reduce impact erosion and vibration.

[0013] Optionally, the condenser further includes a second cover, which is located at the end of the condenser away from the first cover. The second cover has a flow-dividing cavity, and a flow-dividing plate is provided inside the flow-dividing cavity. The flow-dividing plate divides the flow-dividing cavity into an upper flow-dividing cavity and a lower flow-dividing cavity. The upper flow-dividing cavity and the lower flow-dividing cavity are respectively connected to the tube bundle assembly. A flow-dividing port is provided on the flow-dividing plate, and the flow-dividing port connects the upper flow-dividing cavity and the lower flow-dividing cavity.

[0014] When the coolant flows in the condensation chamber, the coolant flowing out of the tube bundle assembly connected to the inflow chamber will flow out at the second cap, and then flow from the second cap into the tube bundle assembly connected to the outflow chamber for further outflow. The manifold can divide the cavity of the second cap, which is beneficial for separating coolant flowing in different directions, improving the flow efficiency of the coolant at the second cap, and thus improving the heat exchange efficiency.

[0015] Optionally, the inner wall of the second cover is curved.

[0016] The coolant flowing out of the tube bundle assembly connected to the inflow chamber has outflow inertia and rushes into the lower distribution chamber of the second cover. By making the inner wall of the second cover curved, the coolant can climb along the curved surface under the influence of outflow inertia and enter the upper distribution chamber, and then flow out through the tube bundle assembly connected to the outflow chamber. The inner wall of the second cover acts as a guide, improving the flow efficiency of the coolant at the second cover, thereby improving the heat exchange efficiency.

[0017] Optionally, the tube bundle assembly includes a cooling tube, a tube sheet, a guide rod, and a guide head. The tube sheet has an opening, the cooling tube is disposed between two tube sheets, and the opening of the cooling tube communicates with the opening of the tube sheet. The guide rod is axially inserted into the cooling tube, and both ends of the guide rod pass through the openings of the two tube sheets respectively. The guide head fixes the end of the guide rod to the tube sheet, and the guide head has a through hole communicating with the opening of the tube sheet.

[0018] By adopting the above technical solution, the guide rod is inserted into the cooling pipe, and both ends are fixed to the tube sheet via guide heads. The guide rod acts as a tie rod for the tube sheet and cooling pipe, adding extra structural support to the cooling pipe and improving its structural stability. With the guide rod inserted into the cooling pipe, when the coolant flows inside, it can flow along the guide rod and fill the cooling pipe, improving the adhesion between the coolant and the cooling pipe wall. This, in turn, enhances the heat exchange effect between the gaseous refrigerant and the coolant through the pipe wall, thus improving heat exchange efficiency.

[0019] Optionally, the flow guide head includes a connecting part and a plurality of flow guide blades, each of the flow guide blades being arranged sequentially at intervals along the circumference of the connecting part. The end of each flow guide blade near the tube sheet is provided with a fixing foot for fixed installation with the tube sheet. A through hole is formed between the fixing feet of adjacent flow guide blades, and a flow guide gap is formed between the blade surfaces of adjacent flow guide blades. The flow guide gap communicates with the through hole. The connecting part is used to connect to the end of the flow guide rod.

[0020] The guide head is equipped with multiple guide vanes. The coolant is guided by the guide vanes to enter the tube sheet inlet and then into the cooling tube, which improves the flow efficiency of the coolant.

[0021] Optionally, the guide rod has helical blades on its circumferential sidewall, and the helical blades are spirally wound along the axial direction of the guide rod.

[0022] The coolant flows axially along the guide rod inside the cooling pipe. The spiral blades can play a spiral guiding role, which not only improves the coolant's adhesion to the wall, but also causes the coolant to spiral and tumble inside the cooling pipe during the flow. This tumbling helps to improve the coolant's turbulence and enhance the exchange of molecules inside and outside the coolant, thereby improving the heat exchange efficiency between the coolant and the gaseous refrigerant.

[0023] Optionally, a guide groove is provided on the circumferential sidewall of the guide rod, and the guide groove is spirally wound along the axial direction of the guide rod.

[0024] The coolant flows axially along the guide rod within the cooling pipe. The guide groove acts as a guide, not only improving the coolant's adhesion to the pipe walls but also guiding the coolant to spiral and tumble within the pipe during flow. This tumbling enhances the coolant's agitation, improving molecular exchange between the coolant and the gaseous refrigerant, thus increasing the heat exchange efficiency between the coolant and the gaseous refrigerant. Furthermore, the use of a guide groove reduces the space occupied by the guide rod.

[0025] Optionally, the tube bundle assembly further includes multiple baffles, which are inserted through the cooling tubes. Each baffle has a baffle notch, and the baffles are arranged sequentially at intervals along the axial direction of the cooling tubes, with the baffle notches of adjacent baffles being staggered.

[0026] The baffles are installed on the cooling pipes to provide auxiliary support for the cooling pipes. At the same time, the gaseous refrigerant flowing in the condensation chamber is redirected along the axial direction of the cooling pipes by the baffles and baffle gaps, which improves the fluidity of the gaseous refrigerant and enhances the heat exchange effect.

[0027] On the other hand, this application also provides a self-circulating heating device for cold storage flooring. The technical solution adopted is as follows: A self-circulating heating device for cold storage flooring includes a refrigeration unit and a floor heating unit; the refrigeration unit includes a compressor and the aforementioned condenser, with the compressor's exhaust port connected to the condenser's inlet pipe; the floor heating unit includes a heating pipe assembly laid on the cold storage floor, the output end of the heating pipe assembly being connected to the condenser's liquid inlet pipe of the refrigeration unit, and the input end of the heating pipe assembly being connected to the condenser's second drain pipe of the refrigeration unit.

[0028] Freezing temperatures typically range from -10°C to -30°C. Although cold storage floors are equipped with insulation layers adapted to the storage temperature, these cannot completely prevent heat transfer; they only slow it down. When the cold storage cools down, a significant temperature difference arises between the storage temperature and the underlying soil. Heat from the soil can still slowly transfer to the cold storage through the insulation layer and cold bridges, causing the soil temperature to drop further. If the underlying soil does not receive sufficient heat, the moisture in the soil will freeze. This freezing process generates expansion force, which, over time, increases as the area of ​​frozen water expands, eventually leading to frost heave or foundation frost expansion, jeopardizing the building's structural safety. Therefore, in addition to insulation and moisture-proof layers, cold storage floors must also undergo frost protection measures to maintain the underlying soil temperature above 0°C.

[0029] Common methods for preventing frost damage in cold storage floors include heating the floor with electric heating wires. This involves laying electric heating wires within the base layer of the cold storage floor insulation, and then controlling the heating of these wires using additional heating equipment to achieve the purpose of heating the floor and preventing frost damage. However, electric heating consumes a lot of electricity, resulting in high manufacturing costs for cold storage facilities.

[0030] Meanwhile, refrigeration equipment is indispensable in the cold storage manufacturing process, and the core components of the refrigeration equipment are the compressor and condenser. The high-temperature, high-pressure gaseous refrigerant produced by the compressor is transported to the condenser, where a low-temperature coolant flows. The low-temperature coolant absorbs the heat from the high-temperature, high-pressure gaseous refrigerant, causing it to release heat and cool down, condensing into a medium-temperature, high-pressure liquid refrigerant. Throughout the entire refrigeration process, the coolant in the condenser needs to maintain effective cooling to ensure the condensation of the high-temperature, high-pressure gaseous refrigerant. Therefore, the supply of low-temperature coolant in the condenser usually requires an additional cooling device for cooling.

[0031] This application fully considers the heating requirements of the floor heating system and the cooling requirements of the condenser, and proposes the self-circulating heating device for cold storage floors as described in this application.

[0032] The self-circulating heating device for the cold storage floor involves laying heating pipe assemblies on the floor. These pipe assemblies are connected to the second drain pipe of the condenser. The condenser supplies the heating pipe assemblies with high-temperature coolant that has absorbed heat and is discharged after cooling. The high-temperature coolant flowing in the heating pipe assemblies provides heat to the cold storage floor for heating and antifreeze purposes. Simultaneously, the low temperature of the cold storage floor carries away the heat from the high-temperature coolant, causing it to transform into a low-temperature coolant for output. The outlet of the heating pipe assemblies is connected to the inlet pipe of the condenser, meaning that the low-temperature coolant output from the heating pipe assemblies flows back into the condenser, where it is heated by pressure. The compressor heats the low-temperature coolant in the condenser with the high-temperature, high-pressure gaseous refrigerant, turning it into a high-temperature coolant for output and return to the heating pipe group for floor heating. Meanwhile, in the condenser, the high-temperature, high-pressure gaseous refrigerant is effectively cooled and liquefied by the low-temperature coolant, transforming into a medium-temperature, high-pressure liquid refrigerant for refrigeration. This cycle repeats continuously, effectively achieving a self-circulating effect for cold storage refrigeration and floor heating, making full use of cold storage resources, with high energy efficiency, and eliminating the need for additional cooling or heating devices, thus reducing the manufacturing cost of cold storage.

[0033] In summary, this application includes at least one of the following beneficial technical effects: 1. By making full use of the compressors and condensers required for cold storage refrigeration, and using the compressors and condensers as heating devices and the cold storage floor as a cooling device, a self-circulation effect of cold storage refrigeration and floor heating is effectively achieved. This fully utilizes cold storage resources, has a high energy efficiency, and eliminates the need for additional cooling or heating devices, thereby reducing the manufacturing cost of cold storage.

[0034] 2. The first cover of the condenser is designed as a double-layer structure, forming a flow guide cavity. The gaseous refrigerant enters the condensing cavity through the flow guide cavity, reducing the impact of the gaseous refrigerant on the tube bundle assembly in the condensing cavity. Moreover, the gaseous refrigerant can start heat exchange from the stagnant fluid at the first cover, reducing the heat exchange efficiency problem caused by stagnation.

[0035] 3. A guide rod is installed inside the cooling pipe to enhance the adhesion between the coolant and the cooling pipe wall and reduce flow turbulence, thereby improving the heat exchange efficiency between the coolant and the gaseous refrigerant. Simultaneously, the guide rod, in conjunction with the guide head, provides a tie rod effect for the cooling pipe and tube sheet, improving the structural stability of the cooling pipe. Attached Figure Description

[0036] Figure 1 This is a structural principle block diagram of Embodiment 1 of this application.

[0037] Figure 2 This is a schematic diagram of the condenser in Embodiment 1 of this application.

[0038] Figure 3 This is a cross-sectional schematic diagram of the condenser in Embodiment 1 of this application.

[0039] Figure 4 This is a schematic diagram of the structure of the shell, tube sheet, and cooling pipe of Embodiment 1 of this application.

[0040] Figure 5 yes Figure 4 Enlarged view of the structure at point A in the middle.

[0041] Figure 6 This is a schematic diagram of the end face structure of the inner cover of Embodiment 1 of this application.

[0042] Figure 7 This is a schematic diagram of the flow guide rod in Embodiment 2 of this application.

[0043] Figure 8 This is a schematic diagram of the flow guide rod in Embodiment 3 of this application.

[0044] Explanation of reference numerals in the attached drawings: 1. Evaporator; 2. Compressor; 3. Condenser; 4. Throttling expansion valve; 5. Heating pipe assembly; 6. Tube bundle assembly; 61. Shell; 611. Shell connection edge; 612. Inlet pipe; 613. First drain pipe; 614. Liquid inlet pipe; 615. Second drain pipe; 616. Condensation chamber; 62. Tube sheet; 621. Pipe inlet; 622. Tube sheet notch; 63. Cooling pipe; 64. Guide rod; 65. Guide head 651. Connecting part; 652. Guide vane; 653. Fixing foot; 654. Through hole; 7. First cover; 71. Inner cover; 72. Outer cover; 73. Guide cavity; 74. Inner connecting edge; 75. Outer connecting edge; 76. Connecting port; 77. Divider plate; 78. Outflow cavity; 79. Inflow cavity; 8. Second cover; 81. Divider plate; 82. Upper divider cavity; 83. Lower divider cavity; 84. Divider port; 9. Baffle plate. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0046] This application discloses a self-circulating heating device for use in cold storage flooring.

[0047] Example 1 Reference Figure 1 A self-circulating heating device for cold storage flooring, comprising a refrigeration unit and a floor heating unit.

[0048] Reference Figures 1 to 3 The refrigeration unit includes an evaporator 1, a compressor 2, a condenser 3, and a throttling expansion valve 4. The condenser 3 has a condensation chamber 616, within which a tube bundle assembly 6 is housed, and coolant flows through the tube bundle assembly 6. The condenser 3 has an inlet pipe 612 and a first drain pipe 613 connecting to the condensation chamber 616. The condenser 3 also has a liquid inlet pipe 614 connecting to the input end of the tube bundle assembly 6 and a second drain pipe 615 connecting to the output end of the tube bundle assembly 6. Refrigerant flows through the evaporator 1. The output end of the evaporator 1 is connected to the inlet of the compressor 2, and the exhaust port of the compressor 2 is connected to the inlet pipe 612 of the condenser 3. The first drain pipe 613 of the condenser 3 is connected to the input end of the throttling expansion valve 4, and the output end of the throttling expansion valve 4 is connected to the input end of the evaporator 1.

[0049] refer to Figures 1 to 3The refrigeration process of the refrigerant in the refrigeration device is as follows: Low-temperature, low-pressure liquid refrigerant flows through evaporator 1. The low-temperature, low-pressure liquid refrigerant absorbs heat, cooling the area around evaporator 1 to achieve a refrigeration effect. After absorbing heat, the low-temperature, low-pressure liquid refrigerant vaporizes into low-temperature, low-pressure gaseous refrigerant, which is then output from evaporator 1. The low-temperature, low-pressure gaseous refrigerant output from evaporator 1 is then transported to compressor 2. Compressor 2 compresses the low-temperature, low-pressure gaseous refrigerant to generate high-temperature, high-pressure gaseous refrigerant, which is then output from compressor 2. The high-temperature, high-pressure gaseous refrigerant generated by compressor 2 is then transported to the condenser 3 through the inlet pipe 612. Inside the condensing chamber 616, a low-temperature coolant flows through the tube bundle assembly 6. The low-temperature coolant absorbs the temperature of the high-temperature, high-pressure gaseous refrigerant flowing in the condensing chamber 616. The high-temperature, high-pressure gaseous refrigerant releases heat and cools down to condense into a medium-temperature, high-pressure liquid refrigerant. The condensed and collected medium-temperature, high-pressure liquid refrigerant is output by the condenser 3 through the first drain pipe 613. The medium-temperature, high-pressure liquid refrigerant produced by the condenser 3 is transported to the throttling expansion valve 4. After being processed by the throttling expansion valve 4, it is converted into a low-temperature, low-pressure liquid refrigerant. The low-temperature, low-pressure liquid refrigerant flows back to the evaporator 1 for refrigeration. This cycle is repeated to achieve cold storage refrigeration.

[0050] refer to Figure 1 The floor heating device includes a heating pipe assembly 5 laid on the floor of the cold storage. The output end of the heating pipe assembly 5 is connected to the liquid inlet pipe 614 of the condenser 3 of the refrigeration device, and the input end of the heating pipe assembly 5 is connected to the second liquid outlet pipe 615 of the condenser 3 of the refrigeration device.

[0051] refer to Figures 1 to 3 The heating process of the coolant in the floor heating device is as follows: The low-temperature coolant flowing in the tube bundle assembly 6 of condenser 3 absorbs heat and cools the high-temperature, high-pressure gaseous refrigerant flowing in the condensing chamber 616. After absorbing heat, the low-temperature coolant is converted into high-temperature coolant and output by the tube bundle assembly 6, and then output through the second drain pipe 615 of condenser 3. The high-temperature coolant is transported to the heating pipe group 5 through the second drain pipe 615 of condenser 3. The heating pipe group 5 is laid on the cold storage floor. The cold storage floor is in a low-temperature environment inside the cold storage. The high-temperature coolant releases heat to heat the cold storage floor, thus heating and preventing freezing. After releasing heat, the high-temperature coolant is converted into low-temperature coolant and output by the heating pipe group 5. The low-temperature coolant flows back to the tube bundle assembly 6 of condenser 3 to absorb heat. This cycle is repeated to provide floor heating.

[0052] This self-circulating heating device for cold storage floors integrates the refrigeration unit and the floor heating unit, effectively achieving a self-circulating effect between cold storage refrigeration and floor heating. It makes full use of cold storage resources, has high energy efficiency, and eliminates the need for additional cooling or heating devices, thereby reducing the manufacturing cost of cold storage.

[0053] Based on the fact that the self-circulating heating device applied to the cold storage floor is a combined application of two heat exchange systems, namely a refrigeration device and a floor heating device, the self-circulating heating device applied to the cold storage floor has a relatively high requirement for heat exchange efficiency. Therefore, the condenser 3, which is the core component of heat exchange, has been further optimized.

[0054] For details, please refer to Figure 2 and Figure 3 The condenser 3 also includes a housing 61, which is a cylindrical structure, and the tube bundle assembly 6 is axially inserted inside the housing 61.

[0055] refer to Figure 3 , Figure 4 and Figure 5 The tube bundle assembly 6 includes a tube sheet 62 and cooling tubes 63. The tube sheet 62 has multiple openings 621, arranged in an array on its surface. There are two tube sheets 62, each mounted on one end of the housing 61. The openings 621 between the two tube sheets 62 correspond one-to-one, and a cooling tube 63 is provided between each corresponding opening 621. Both ends of the cooling tube 63 are inserted into the openings 621 of the two tube sheets 62, and the openings 621 of the cooling tube 63 communicate with the openings 621 of the tube sheets 62. Cooling pipe 63 is located inside housing 61, and a condensation chamber 616 for gaseous refrigerant to flow is formed between cooling pipe 63 and housing 61. The gaseous refrigerant is condensed in condensation chamber 616 through cooling pipe 63. A first drain pipe 613 is connected to housing 61, and the first drain pipe 613 is connected to condensation chamber 616. The first drain pipe 613 is used for the outflow of condensed liquid refrigerant.

[0056] refer to Figure 3 and Figure 4 The tube bundle assembly 6 also includes a guide rod 64 and a guide head 65. The guide rod 64 is axially inserted into the cooling tube 63, and its two ends protrude from the tube openings 621 of the two tube sheets 62, respectively. The guide head 65 is installed on the end of the guide rod 64 that protrudes from the tube openings 621 of the tube sheet 62. Within the cooling tube 63, the coolant can flow along the guide rod 64 and fill the cooling tube 63, improving the adhesion between the coolant and the cooling tube 63, thereby enhancing the heat exchange effect between the gaseous refrigerant in the condensation chamber 616 and the coolant through the tube wall of the cooling tube 63, thus improving heat exchange efficiency.

[0057] refer to Figure 5The guide head 65 includes a connecting part 651 and multiple guide vanes 652. The connecting part 651 is a cylindrical connector. The end of the connecting part 651 away from the guide rod 64 is provided with a conical shape. The end of the connecting part 651 near the guide rod 64 is provided with a threaded groove along the axial direction. The connecting part 651 is fixedly installed on the end of the guide rod 64 through the threaded groove. Each guide vane 652 is arranged sequentially at intervals along the circumferential outer wall of the connecting part 651. The end of the guide vane 652 near the guide rod 64 is provided with a fixing foot 653 extending radially along the connecting part 651. The fixing foot 653 of the guide vane 652 abuts against the plate surface of the tube sheet 62. The tightening of the connecting part 651 through the threaded groove can improve the clamping force between the fixing foot 653 of the guide vane 652 and the plate surface of the tube sheet 62. After the guide heads 65 at both ends of the guide rod 64 are simultaneously threaded and locked, the guide rod 64 can be stably clamped and locked between the two tube sheets 62. The guide rod 64 is stably located inside the cooling tube 63. Based on this clamped and locked state, the guide rod 64 can be used as a tie rod between the two tube sheets 62 to tighten and support the two tube sheets 62 and the cooling tube 63 located between the two tube sheets 62, and to assist in supporting the cooling tube 63 and improve the structural stability. In other embodiments, to improve the fixing effect of the guide head 65, the fixing feet 653 of the guide head 65 can be locked to the plate surface of the tube sheet 62 by bolts or other fasteners.

[0058] refer to Figure 5 The guide vanes 652 on the guide head 65 are spaced apart. A through hole 654 is formed between the fixing feet 653 of adjacent guide vanes 652, and the through hole 654 communicates with the tube opening 621 of the tube sheet 62. A guide gap is formed between the blade surfaces of adjacent guide vanes 652, and the guide gap communicates with the through hole 654. The blade surfaces of the guide vanes 652 are spirally deflected circumferentially along the connecting portion 651. Thus, the coolant can quickly pass through the guide head 65 into the tube opening 621 of the tube sheet 62 and into the cooling pipe 63 based on the guiding effect of the guide gap, reducing coolant stagnation at the tube opening 621 of the tube sheet 62. In other embodiments, to improve the guiding effect of the guide head 65, the end of the connecting portion 651 of the guide head 65 away from the guide rod 64 can be made conical. The conical shape can reduce the resistance of the connecting portion 651 to the coolant.

[0059] refer to Figure 2 and Figure 3 The condenser 3 also includes a first cover 7 and a second cover 8, which are located at the two ends of the housing 61 respectively. The tube bundle assembly 6 is located between the first cover 7 and the second cover 8. A flow cavity is formed between the first cover 7 and the tube sheet 62 of the tube bundle assembly 6, and a flow distribution cavity is formed between the second cover 8 and the tube sheet 62 of the tube bundle assembly 6.

[0060] refer to Figure 3The first cover 7 includes an inner cover 71 and an outer cover 72 fitted outside the inner cover 71.

[0061] refer to Figure 3 and Figure 6 The inner cover 71 has an inner connecting edge 74 extending radially, the outer cover 72 has an outer connecting edge 75 extending radially, and the port of the housing 61 has a housing connecting edge 611 extending radially. The outer connecting edge 75 abuts against the inner connecting edge 74, and the inner connecting edge 74 abuts against the housing connecting edge 611. The outer connecting edge 75, the inner connecting edge 74 and the housing connecting edge 611 are fixedly connected by bolts or other fasteners. The inner diameter of the inner cover 71 is smaller than the inner diameter of the shell 61. A flow chamber for coolant circulation is formed between the inner wall of the inner cover 71 and the tube sheet 62 located at the port of the shell 61. The tube opening 621 on the tube sheet 62 is located within the flow chamber. A guide cavity 73 is formed between the inner cover 71 and the outer cover 72. A connecting port 76 is provided on the inner connecting edge 74 within the guide cavity 73. A tube sheet notch 622 is provided on the tube sheet 62 located in the flow chamber, corresponding to the connecting port 76. The tube sheet notch 622 communicates with the condensation chamber 616. The air inlet pipe 612 is connected to the outer cover 72 and communicates with the guide cavity 73.

[0062] refer to Figure 3The coolant enters the cooling pipe 63 through the flow chamber at the first cap 7 and then through the tube opening 621 of the tube sheet 62. Coolant tends to stagnate in the flow chamber, reducing heat exchange efficiency. However, through the inner and outer caps 72, gaseous refrigerant enters the guide chamber 73, the connecting port 76, and the tube sheet notch 622 through the inlet pipe 612 to enter the condensation chamber 616. The guide chamber 73 surrounds the flow chamber, meaning that the high-temperature, high-pressure gaseous refrigerant can exchange heat with the coolant stagnating in the flow chamber while in the guide chamber 73, reducing heat exchange problems in the stagnant area and effectively improving heat exchange efficiency. Furthermore, the high-temperature, high-pressure gaseous refrigerant flows along the wall of the guide cavity 73 within the guide cavity 73, creating a deflection effect. This allows the high-temperature, high-pressure gaseous refrigerant to enter the condenser cavity 616 parallel to the axial direction of the tube bundle assembly 6, significantly reducing impact vibration issues. Moreover, within the guide cavity 73, the outer wall of the inner cover 71 acts as an anti-impact wall for the high-temperature, high-pressure gaseous refrigerant, helping to buffer and disperse its impact when it rushes into the guide cavity 73, thus reducing the impact of the high-temperature, high-pressure gaseous refrigerant entering the condenser cavity 616. To further improve the guiding effect of the guide cavity 73, in this embodiment, the inner cover 71 and the outer cover 72 are also set as curved covers, making the cross-sectional shape of the guide cavity 73 U-shaped. The U-shape is beneficial for improving the guiding efficiency of the high-temperature, high-pressure gaseous refrigerant and reducing its retention within the guide cavity 73. In other embodiments, an arched portion can be provided on the outer wall of the inner cover 71, such that the arched surface of the arched portion faces the air inlet pipe 612. The arched surface of the arched portion has a large surface area, which can increase the contact area between the arched portion and the high-temperature and high-pressure gaseous refrigerant. Moreover, the cross-sectional shape of the arched surface is an arc-shaped structure, which has high stability and high surface tension. Therefore, it can effectively help disperse the impact of the high-temperature and high-pressure gaseous refrigerant and reduce impact erosion and vibration.

[0063] refer to Figure 3 and Figure 6 The inner cover 71 is located within the flow cavity and is further provided with a partition plate 77. The partition plate 77 divides the flow cavity into an outflow cavity 78 and an inflow cavity 79. The cooling pipe 63 corresponding to the tube opening 621 of the tube sheet 62 located in the outflow cavity 78 is called the cooling output pipe, and the cooling pipe 63 corresponding to the tube opening 621 of the tube sheet 62 located in the inflow cavity 79 is called the cooling input pipe. The liquid inlet pipe 614 passes through the outer cover 72 and is connected to the inner cover 71. The liquid inlet pipe 614 is connected to the inflow cavity 79. The second drain pipe 615 passes through the outer cover 72 and is connected to the inner cover 71. The second drain pipe 615 is connected to the outflow cavity 78.

[0064] Thus, for reference Figure 3The coolant enters the inflow chamber 79 through the inlet pipe 614, is transported to the diversion chamber at the second cover 8 through the cooling input pipe, and is diverted to the cooling output pipe through the diversion chamber. The cooling output pipe delivers the coolant to the outflow chamber 78, and then it is discharged through the second drain pipe 615, thus completing the flow of coolant in the condenser 3.

[0065] refer to Figure 3 The second cover 8 is located within the flow distribution cavity and is equipped with a flow distribution plate 81, which divides the flow distribution cavity into an upper flow distribution cavity 82 and a lower flow distribution cavity 83. Both ends of the flow distribution plate 81 are fixedly mounted on the second cover 8. One side of the flow distribution plate 81 abuts against the tube plate 62 located at the port of the housing 61. The side of the flow distribution plate 81 away from the tube plate 62 forms a flow distribution port 84 with the inner wall of the second cover 8. The flow distribution port 84 connects the upper flow distribution cavity 82 and the lower flow distribution cavity 83. The upper flow distribution cavity 82 is connected to the cooling output pipe, and the lower flow distribution cavity 83 is connected to the cooling input pipe.

[0066] refer to Figure 3 The coolant output from the cooling input pipe gathers in the distribution chamber and then flows to the cooling output pipe. The distribution plate 81 divides the distribution chamber, which is beneficial for separating coolant flowing in different directions and can improve the flow efficiency of coolant at the second cover 8, thereby improving the heat exchange efficiency. In this embodiment, the second cover 8 is a curved cover. The coolant flowing out of the cooling input pipe enters the lower distribution chamber 83 of the second cover 8 with outflow inertia. By making the inner wall of the second cover 8 curved, the coolant can climb along the curved surface under the influence of outflow inertia to enter the upper distribution chamber 82, and then flow out through the cooling output pipe. The inner wall of the second cover 8 acts as a guide, improving the flow efficiency of coolant at the second cover 8, thereby improving the heat exchange efficiency.

[0067] refer to Figure 3 and Figure 4 The condenser 3 also includes a baffle plate 9, which is installed inside the housing 61 and passes through the cooling pipe 63. A baffle notch is formed between the baffle plate 9 and the housing 61. Each baffle plate 9 is arranged sequentially at intervals along the axial direction of the cooling pipe 63, and the baffle notches of adjacent baffle plates 9 are staggered.

[0068] refer to Figure 3 and Figure 4 The baffle 9 is installed on the cooling pipe 63, which can provide auxiliary support for the cooling pipe 63. At the same time, the gaseous refrigerant flowing in the condensation chamber 616 is turned and flows along the axial direction of the cooling pipe 63 through the baffle 9 and the baffle notch, which improves the fluidity of the gaseous refrigerant and enhances the heat exchange effect.

[0069] Example 2 Reference Figure 7The difference between this embodiment and embodiment 1 is that in embodiment 2, the circumferential sidewall of the guide rod 64 is provided with helical blades, and the helical blades are spirally wound along the axial direction of the guide rod 64.

[0070] The coolant flows axially along the guide rod 64 into the cooling pipe 63. The spiral blades can play a spiral guiding role, which not only improves the coolant's adhesion to the wall, but also causes the coolant to spiral and tumble within the cooling pipe 63 during the flow. This tumbling helps to improve the coolant's turbulence and enhance the exchange of molecules inside and outside the coolant, thereby improving the heat exchange efficiency between the coolant and the gaseous refrigerant.

[0071] Example 3 Reference Figure 8 The difference between this embodiment and embodiment 1 is that in embodiment 3, a guide groove is provided on the circumferential side wall of the guide rod 64, and the guide groove is spirally wound along the axial direction of the guide rod 64.

[0072] The coolant flows axially along the guide rod 64 within the cooling pipe 63. The guide groove acts as a guide, not only improving the coolant's adhesion to the pipe wall but also guiding the coolant to spiral and tumble within the cooling pipe 63 during flow. This tumbling enhances the coolant's agitation, improving molecular exchange between the coolant and the gaseous refrigerant, thereby increasing the heat exchange efficiency between the coolant and the gaseous refrigerant. Simultaneously, the use of a guide groove reduces the space occupied by the guide rod 64.

[0073] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A condenser, characterized in that: Includes a housing (61), a condensation chamber (616) is provided inside the housing (61), and a tube bundle assembly (6) is provided inside the condensation chamber (616). It also includes a first cover (7), which is disposed on the port of the condensation chamber. The first cover (7) includes an inner cover (71) and an outer cover (72) sleeved on the outside of the inner cover (71). A flow guide cavity (73) is formed between the inner cover (71) and the outer cover (72). An air inlet pipe (612) communicating with the flow guide cavity (73) is provided on the outer cover (72). The inner cover (71) is provided with a communication port (76) for communicating with the flow guide cavity (73) and the condensation chamber (616). The inner cover (71) is provided with a flow cavity. The inner cover (71) is provided with a partition plate (77) inside the flow cavity. The partition plate (77) divides the flow cavity into an outflow cavity (78) and an inflow cavity (79). The outflow cavity (78) and the inflow cavity (79) are respectively connected to the tube bundle assembly (6). The inner cover (71) is provided with an inlet pipe (614) for connecting the inflow cavity (79) and a second drain pipe (615) for connecting the outflow cavity (78).

2. The condenser according to claim 1, characterized in that: The inner wall of the outer cover (72) is curved; the outer wall of the inner cover (71) is curved.

3. The condenser according to claim 1 or 2, characterized in that: The inner cover (71) has an arched portion on its outer wall, and the arched surface of the arched portion faces the air intake pipe (612).

4. The condenser according to claim 1, characterized in that: The condenser (3) further includes a second cover (8), which is located at the end of the condenser (3) away from the first cover (7). The second cover (8) has a flow distribution cavity, and a flow distribution plate (81) is provided in the flow distribution cavity. The flow distribution plate (81) divides the flow distribution cavity into an upper flow distribution cavity (82) and a lower flow distribution cavity (83). The upper flow distribution cavity (82) and the lower flow distribution cavity (83) are respectively connected to the tube bundle assembly (6). A flow distribution port (84) is opened on the flow distribution plate (81), and the flow distribution port (84) connects the upper flow distribution cavity (82) and the lower flow distribution cavity (83).

5. The condenser according to claim 4, characterized in that: The inner wall of the second cover (8) is curved.

6. The condenser according to claim 1, characterized in that: The tube bundle assembly (6) includes a cooling tube (63), a tube sheet (62), a guide rod (64), and a guide head (65). The tube sheet (62) has a tube opening (621). The cooling tube (63) is located between the two tube sheets (62). The tube opening (621) of the cooling tube (63) is connected to the tube opening (621) of the tube sheet (62). The guide rod (64) is axially inserted into the cooling tube (63). Both ends of the guide rod (64) pass through the tube openings (621) of the two tube sheets (62) respectively. The guide head (65) fixes the end of the guide rod (64) to the tube sheet (62). The guide head (65) has a through hole (654) that connects to the tube opening (621) of the tube sheet (62).

7. The condenser according to claim 6, characterized in that: The flow guide head (65) includes a connecting part (651) and a plurality of flow guide blades (652). Each flow guide blade (652) is arranged sequentially at intervals along the circumference of the connecting part (651). The end of the flow guide blade (652) near the tube sheet (62) is provided with a fixing foot (653) for fixed installation with the tube sheet (62). The fixing feet (653) of adjacent flow guide blades (652) form the through hole (654). The blade surfaces of adjacent flow guide blades (652) form a flow guide gap, which communicates with the through hole (654). The connecting part (651) is used to connect with the end of the flow guide rod (64).

8. The condenser according to claim 6, characterized in that: The guide rod (64) has helical blades on its circumferential sidewalls, and the helical blades are spirally coiled along the axial direction of the guide rod (64).

9. The condenser according to claim 6, characterized in that: The guide rod (64) has a guide groove on its circumferential sidewall, and the guide groove is spirally wound along the axial direction of the guide rod (64).

10. A self-circulating heating device for cold storage flooring, characterized in that: This includes refrigeration equipment and floor heating equipment; The refrigeration device includes a compressor (2) and a condenser (3) according to any one of claims 1-9, wherein the exhaust port of the compressor (2) is connected to the intake pipe (612) of the condenser (3); The floor heating device includes a heating pipe assembly (5) laid on the floor of the cold storage. The output end of the heating pipe assembly (5) is connected to the liquid inlet pipe (614) of the condenser (3) of the refrigeration device, and the input end of the heating pipe assembly (5) is connected to the second liquid outlet pipe (615) of the condenser (3) of the refrigeration device.

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