A high-efficiency and energy-saving refrigeration system based on heat recovery
By combining the high-temperature recovery unit with the medium- and low-temperature recovery unit, along with copper threaded tubes and plate heat exchange components, the problem of direct discharge of waste heat from the condenser of the refrigeration system is solved, realizing the cascade utilization and precise control of waste heat, and improving energy efficiency and equipment stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI HONGHAI FOODSTUFF CO LTD
- Filing Date
- 2025-09-30
- Publication Date
- 2026-07-31
AI Technical Summary
Existing refrigeration systems directly release waste heat from the condenser into the environment, resulting in serious energy waste. They also lack the ability to make refined use of waste heat and cannot meet the needs of various scenarios.
It adopts high-temperature recovery units and medium-low temperature recovery units, combined with copper threaded tubes and plate heat exchange components, and uses temperature zone separators to recover and utilize waste heat in stages, and combines intelligent control components to achieve precise regulation.
It enables the cascade utilization of waste heat, improves energy efficiency, reduces system energy consumption, adapts to multiple scenarios, and reduces operation and maintenance costs.
Smart Images
Figure CN224580788U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat recovery technology, specifically to a high-efficiency and energy-saving refrigeration system based on heat recovery. Background Technology
[0002] In large-scale industrial production, commercial operations, and hotel services, refrigeration systems generate a large amount of condensation waste heat during operation. If this waste heat is directly discharged, it will not only cause a huge waste of energy, but also cause certain thermal pollution to the environment.
[0003] Existing refrigeration systems directly release waste heat from condensers into the environment, resulting in significant energy waste. They also lack refined utilization of waste heat and cannot meet the needs of various scenarios (such as hot water supply and dehumidification regeneration). Therefore, a high-efficiency and energy-saving refrigeration system based on heat recovery is needed to recover waste heat in stages according to temperature, meet different needs, and achieve multi-level utilization. Utility Model Content
[0004] To address this issue, this invention provides a high-efficiency and energy-saving refrigeration system based on heat recovery. By using a high-temperature recovery unit and a medium- and low-temperature recovery unit, it solves the problems of refrigeration system condenser waste heat being directly discharged into the environment, resulting in serious energy waste, lack of refined utilization of waste heat, and inability to adapt to the needs of multiple scenarios.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency and energy-saving refrigeration system based on heat recovery, comprising a refrigeration system condenser, a heat recovery pipe connected inside the refrigeration system condenser, a heat recovery assembly on one side of the heat recovery pipe, the heat recovery assembly including a heat recovery exchanger main shell, a heat exchange medium inlet fixedly provided at one end of the heat recovery exchanger main shell, the heat exchange medium inlet being fixedly connected to the heat recovery pipe, a heat recovery exchanger sub-shell provided at the other end of the heat recovery exchanger main shell, a heat exchange medium outlet fixedly provided at one end of the heat recovery exchanger sub-shell, a high-temperature recovery unit and a medium-low temperature recovery unit provided inside the heat recovery exchanger main shell, a plate heat exchange component provided inside the medium-low temperature recovery unit, a temperature zone partition plate fixedly provided inside the heat recovery exchanger main shell, and control components provided outside the high-temperature recovery unit and the medium-low temperature recovery unit, the control components including a controller, multiple connection lines provided outside the controller, the other end of each of the multiple connection lines being connected to a flow control valve and a temperature sensor.
[0006] Preferably, the high-temperature recovery unit includes a copper threaded tube, with an inlet pipe and an outlet pipe fixed at both ends of the copper threaded tube.
[0007] Preferably, one end of both the inlet pipe and the outlet pipe extends outside the main housing of the heat recovery exchanger and is fixedly connected to the main housing of the heat recovery exchanger.
[0008] Preferably, the medium-low temperature recovery unit includes a hot water storage tank, which is fixedly installed inside the main shell of the heat recovery exchanger. The top and bottom of the hot water storage tank are respectively provided with an inlet and an outlet.
[0009] Preferably, one end of both the inlet and outlet extends outside the main housing of the heat recovery exchanger and is fixedly connected to the main housing of the heat recovery exchanger.
[0010] Preferably, the plate heat exchange component includes a heat exchange plate disposed inside the hot water storage tank. One end of the heat exchange plate is fixedly provided with a connecting outer circular block. An external threaded ring is sleeved on the outside of the connecting outer circular block, and an internal threaded ring is sleeved on the outside of the external threaded ring.
[0011] Preferably, the external threaded ring is sleeved on the outside of the connecting outer circular block and connected to the connecting outer circular block through a bearing. The external threaded ring and the internal threaded ring are connected by threads, and the internal threaded ring is fixedly installed inside the main housing of the heat recovery exchanger.
[0012] Preferably, the plurality of flow control valves and temperature sensors are respectively fixedly sleeved on the outside of the water inlet pipe, water outlet pipe, water inlet, and water outlet.
[0013] The present invention has the following advantages: Through the synergistic effect of high-temperature recovery units and medium-low temperature recovery units, the waste heat that was originally directly discharged is precisely distributed to different scenarios such as industrial processes, domestic hot water, and dehumidification regeneration according to temperature. This avoids the energy waste of "high-grade heat being underutilized", greatly improves energy utilization, reduces the overall energy consumption of the system, and realizes the graded recovery and cascade utilization of condensation waste heat. The high-temperature section uses high-thermal-conductivity copper threaded tubes to enhance heat exchange efficiency, while the medium and low-temperature section uses detachable plate heat exchange components to improve heat exchange effect. The threaded connection design of the plate structure facilitates cleaning and maintenance. Combined with intelligent control components for precise control of temperature and flow, it can not only ensure long-term stable heat recovery efficiency, but also reduce equipment operation and maintenance costs, and adapt to the continuous operation needs of multiple scenarios. Attached Figure Description
[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0016] Figure 1 A schematic diagram of the overall structure of this utility model; Figure 2 A partial perspective view of the main view provided for this utility model; Figure 3 This is a partial sectional perspective view of the main view provided for this utility model; Figure 4 Partial exploded sectional view of the high-temperature recovery unit and the medium-low temperature recovery unit provided by this utility model; Figure 5 An exploded perspective view of the plate heat exchange component provided by this utility model.
[0017] In the diagram: 1. Refrigeration system condenser; 2. Heat recovery pipe; 3. Main shell of heat recovery exchanger; 4. Heat exchange medium inlet; 5. Secondary shell of heat recovery exchanger; 6. Heat exchange medium outlet; 7. High-temperature recovery unit; 71. Copper threaded pipe; 72. Inlet pipe; 73. Outlet pipe; 8. Medium and low temperature recovery unit; 81. Hot water storage tank; 82. Inlet; 83. Outlet; 9. Plate heat exchanger components; 91. Heat exchange plate; 92. Connecting outer circular block; 93. External threaded ring; 94. Internal threaded ring; 10. Temperature zone partition plate; 11. Controller; 12. Connecting lines; 13. Flow control valve; 14. Temperature sensor. Detailed Implementation
[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] See attached document Figure 1 - Appendix Figure 5This utility model provides a high-efficiency and energy-saving refrigeration system based on heat recovery, including a refrigeration system condenser 1, a heat recovery pipe 2 connected inside the refrigeration system condenser 1, a heat recovery assembly on one side of the heat recovery pipe 2, the heat recovery assembly including a heat recovery exchanger main shell 3, a heat exchange medium inlet 4 fixedly provided at one end of the heat recovery exchanger main shell 3, the heat exchange medium inlet 4 being fixedly connected to the heat recovery pipe 2, a heat recovery exchanger sub-shell 5 provided at the other end of the heat recovery exchanger main shell 3, a heat exchange medium outlet 6 fixedly provided at one end of the heat recovery exchanger sub-shell 5, a high temperature recovery unit 7 and a medium and low temperature recovery unit 8 provided inside the heat recovery exchanger main shell 3, a plate heat exchange component 9 provided inside the medium and low temperature recovery unit 8, a temperature zone partition plate 10 fixedly provided inside the heat recovery exchanger main shell 3, and control components provided outside the high temperature recovery unit 7 and the medium and low temperature recovery unit 8, the control components including a controller 11, multiple connection lines 12 provided outside the controller 11, and a flow control valve 13 and a temperature sensor 14 connected to the other end of each of the multiple connection lines 12; In this implementation scheme, in order to achieve the purpose of graded recovery and utilization of condensation waste heat generated by the condenser of the refrigeration system, when the refrigeration system is running, a large amount of condensation waste heat generated by the condenser 1 is absorbed by the heat exchange medium in the heat recovery pipe 2. The heat exchange medium carrying the waste heat enters the main shell 3 of the heat recovery exchanger through the heat exchange medium inlet 4. Through the separation effect of the temperature zone partition plate 10, independent high-temperature zone and medium-low temperature zone are formed inside the main shell 3 of the heat recovery exchanger, corresponding to the high-temperature recovery unit 7 and the medium-low temperature recovery unit 8, respectively. The high-temperature recovery unit 7 utilizes the high thermal conductivity of the copper threaded tube 71 to efficiently transfer the waste heat in the high-temperature section. The process water flowing through it directly meets the high-temperature heat demand scenarios such as industrial production; the medium and low temperature recovery unit 8 transfers the waste heat of the medium and low temperature section to domestic water or for dehumidification and regeneration scenarios through the plate heat exchange component 9 in the hot water storage tank 81, realizing the cascade utilization of waste heat. At the same time, the temperature sensor 14 in the control component monitors the medium temperature at the inlet and outlet of each unit in real time, and the controller 11 adjusts the opening of the flow control valve 13 according to the monitoring data to dynamically balance the waste heat recovery amount of the high temperature section and the medium and low temperature section, ensuring that the waste heat of different temperature sections can be accurately matched to the corresponding demand scenarios, maximizing the energy utilization rate. To achieve efficient recovery and targeted utilization of high-temperature waste heat and ensure that high-temperature thermal energy can accurately match the high-temperature heat demand of industrial processes, this device adopts the following technical solution: The high-temperature recovery unit 7 includes a copper threaded tube 71. An inlet pipe 72 and an outlet pipe 73 are fixedly installed at both ends of the copper threaded tube 71. One end of both the inlet pipe 72 and the outlet pipe 73 extends out of the main shell 3 of the heat recovery exchanger and is fixedly connected to the main shell 3. The copper threaded tube 71 is made of copper with a high thermal conductivity, and its spiral winding structure is designed... The design increases the contact area with the high-temperature medium inside the main shell 3 of the heat recovery exchanger, enabling rapid and efficient absorption of waste heat in the high-temperature section. When process water enters the copper threaded tube 71 from the inlet pipe 72, it undergoes intense heat exchange with the high-temperature medium through the tube wall, rapidly raising the water temperature to meet the direct demand for high-temperature hot water in industrial production. The heated high-temperature process water is then transported to the process heat equipment through the outlet pipe 73. At the same time, the spiral structure of the copper threaded tube 71 causes the water flow to form turbulence inside the tube, further enhancing the heat exchange effect and ensuring that the heat recovery efficiency in the high-temperature section reaches a high level. To achieve efficient recovery and flexible application of waste heat in the medium and low temperature range, and to meet the heating needs of various scenarios such as domestic hot water supply and dehumidification regeneration, this device adopts the following technical solution: The medium and low temperature recovery unit 8 includes a hot water storage tank 81, which is fixedly installed inside the main shell 3 of the heat recovery exchanger. The top and bottom of the hot water storage tank 81 are respectively fixed with an inlet 82 and an outlet 83. One end of both the inlet 82 and the outlet 83 extends out of the main shell 3 of the heat recovery exchanger and is fixedly connected to it. After heat exchange in the high temperature recovery unit 7, the medium and low temperature waste heat... The medium enters the low-temperature zone of the main shell 3 of the heat recovery exchanger and undergoes secondary heat exchange with the water in the hot water storage tank 81. The plate heat exchange component 9 in the hot water storage tank 81 increases the heat exchange area and efficiently absorbs the low-temperature waste heat, gradually raising the water temperature in the tank. Cold water is continuously replenished to the bottom of the hot water storage tank 81 through the inlet 82. When the water temperature reaches the set temperature, the hot water is transported to the domestic hot water pipe network or dehumidification and regeneration equipment and other low-temperature heating scenarios through the outlet 83. The design of the inlet 82 and outlet 83 extending outside the shell facilitates connection with external pipelines and ensures the system's airtightness through fixed connection. To improve the heat exchange efficiency in the medium and low temperature range, facilitate equipment maintenance and repair, and extend service life, this device adopts the following technical solution: The plate heat exchange component 9 includes a heat exchange plate 91, which is located inside the hot water storage tank 81. One end of the heat exchange plate 91 is fixedly provided with a connecting outer circular block 92. An external threaded ring 93 is sleeved on the outside of the connecting outer circular block 92, and an internal threaded ring 94 is sleeved on the outside of the external threaded ring 93. The external threaded ring 93 is sleeved on the outside of the connecting outer circular block 92 and connected to the connecting outer circular block 92 via a bearing. The external threaded ring 93 and the internal threaded ring 94 are connected by threads. The internal threaded ring 94 is fixed inside the main shell 3 of the heat recovery exchanger. When a medium carrying medium and low temperature waste heat enters the medium and low temperature region of the main shell 3 of the heat recovery exchanger, the heat exchange plate 91, with its unique corrugated structure, increases the contact between the heat exchange plate and the cold water inside the hot water storage tank 81. The increased contact area also promotes turbulence in the fluid, greatly improving heat exchange efficiency. Low- and medium-temperature waste heat is quickly transferred to cold water through the heat exchange plate 91, gradually raising the water temperature to meet heating demands. In terms of equipment maintenance, the threaded connection design of the external threaded ring 93 and the internal threaded ring 94 provides a convenient disassembly method. When it is necessary to clean or replace the heat exchange plate 91, simply rotate the external threaded ring 93 (which is connected to the connecting outer circular block 92 through a bearing, allowing for flexible rotation without rotating the heat exchange plate) to remove the entire plate heat exchange component 9 from the hot water storage tank 81 without dismantling the complex piping system. This detachable structure effectively reduces maintenance difficulty and shortens repair time. After long-term operation, if scale appears on the surface of the heat exchange plate 91, it can be thoroughly cleaned by disassembly to restore its heat exchange performance and ensure the stability of the heat recovery efficiency in the low- and medium-temperature range. To achieve precise control and dynamic adjustment of the heat recovery process, ensuring that waste heat energy at different temperature ranges is allocated as needed and achieves optimal utilization efficiency, this device employs the following technical solution: Multiple flow control valves 13 and temperature sensors 14 are respectively fixedly sleeved on the outside of the inlet pipe 72, outlet pipe 73, inlet 82, and outlet 83. The temperature sensors 14 monitor the water temperature data at each key node in real time: the temperature sensor at the inlet pipe 72 monitors the inlet temperature of the process water and provides feedback on the initial water temperature status; the temperature sensor at the outlet pipe 73 monitors the outlet temperature of the high-temperature process water to ensure that it meets the needs of industrial production; the temperature sensor at the inlet 82 monitors the temperature of the cold water entering the hot water storage tank 81; and the temperature sensor at the outlet 83 monitors the outlet temperature of the medium-low temperature hot water to ensure that it meets the needs of industrial production. To meet the requirements for domestic hot water or dehumidification regeneration, the controller 11, based on preset temperature thresholds and real-time monitoring data, precisely adjusts the flow control valve 13 of the corresponding pipeline through the connection line 12: High-temperature section adjustment logic: When the temperature of the outlet pipe 73 is lower than the set value, the controller increases the opening of the flow control valve of the inlet pipe 72 to increase the process water flow to absorb more high-temperature waste heat; conversely, it decreases the opening to avoid excessive energy consumption; Medium and low temperature section adjustment logic: Based on the deviation between the temperature of the outlet 83 and the target value, the controller dynamically adjusts the flow control valve of the inlet 82 to maintain a stable water temperature in the hot water storage tank 81; Coupled adjustment mechanism: When the demand in the high-temperature section increases, the system automatically reduces the flow allocation in the medium and low temperature sections to prioritize the high-temperature process water; conversely, it releases more waste heat to the medium and low temperature units to achieve optimized energy allocation.
[0020] The usage process of this utility model is as follows: When using this utility model, during the operation of the refrigeration system, the condenser 1 of the refrigeration system generates a large amount of condensation waste heat. This waste heat is absorbed by the heat exchange medium carried by the heat recovery pipe 2 flowing through the condenser. The heat exchange medium carrying the waste heat enters the main shell 3 of the heat recovery exchanger through the heat exchange medium inlet 4. Since the main shell 3 of the heat recovery exchanger is equipped with a temperature zone partition plate 10, the internal space is divided into a high temperature zone and a medium and low temperature zone, corresponding to the high temperature recovery unit 7 and the medium and low temperature recovery unit 8, respectively. The medium carrying the waste heat first enters the high temperature recovery unit 7. The copper threaded pipe 71 in the high temperature recovery unit 7 has excellent thermal conductivity. (Referring to the high thermal conductivity characteristics of copper tubes), at this time, process water enters copper threaded tube 71 through inlet pipe 72, and undergoes efficient heat exchange with the medium carrying high-temperature waste heat. The heated process water is output through outlet pipe 73, which can directly meet the process requirements for high-temperature hot water in industrial production. After heat exchange in high-temperature recovery unit 7, the temperature of the medium decreases and enters medium-low temperature recovery unit 8. The hot water storage tank 81 in medium-low temperature recovery unit 8 stores water to be heated, and secondary heat exchange is performed through internal plate heat exchange component 9. The heat exchange plate 91 of plate heat exchange component 9 increases the heat exchange area and can efficiently absorb medium-low temperature waste heat, so that the water in the hot water storage tank 81 can undergo secondary heat exchange. Heating is performed, and the heated water can be supplied to domestic hot water, dehumidification and regeneration, and other medium- and low-temperature heating scenarios through the outlet 83. Cold water is continuously replenished to the hot water storage tank 81 through the inlet 82. In the entire heat recovery process, the control components play a key regulatory role. Temperature sensors 14 monitor the inlet and outlet medium temperatures of the high-temperature recovery unit 7 and the medium- and low-temperature recovery unit 8, as well as the water temperature of each pipeline, and transmit the temperature data to the controller 11 through the connection line 12. The controller 11 automatically adjusts the opening of the corresponding flow control valve 13 according to the preset temperature requirements and real-time monitoring data. For example, when the demand for high-temperature process water increases, the controller increases the opening of the high-temperature recovery unit 7. The flow control valve opening of the inlet pipe 72 increases the process water flow to absorb more high-temperature waste heat. When the demand for medium and low temperature heat is stable, the flow control valve of the inlet 82 of the medium and low temperature recovery unit 8 is adjusted to ensure that the water temperature in the hot water storage tank 81 is maintained within a suitable range. After completing the heat exchange medium of multi-stage heat recovery, it finally flows out of the heat recovery exchanger shell 5 through the heat exchange medium outlet 6. At this time, the waste heat carried by the medium has been fully utilized in stages, effectively reducing energy waste and thermal pollution caused by direct discharge. At the same time, the plate heat exchange component 9 is detachable through the threaded connection between the external threaded ring 93 and the internal threaded ring 94, which facilitates regular cleaning and maintenance and ensures long-term heat exchange efficiency.
[0021] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.
Claims
1. A high efficiency energy saving refrigeration system based on heat recovery comprising a refrigeration system condenser (1) characterized by: The condenser (1) of the refrigeration system is internally connected to a heat recovery pipe (2). A heat recovery assembly is provided on one side of the heat recovery pipe (2). The heat recovery assembly includes a heat recovery exchanger main shell (3). A heat exchange medium inlet (4) is fixedly provided at one end of the heat recovery exchanger main shell (3). The heat exchange medium inlet (4) is fixedly connected to the heat recovery pipe (2). A heat recovery exchanger sub-shell (5) is provided at the other end of the heat recovery exchanger main shell (3). A heat exchange medium outlet (6) is fixedly provided at one end of the heat recovery exchanger sub-shell (5). The heat recovery exchanger main shell (1) is internally connected to a heat recovery medium inlet (2). 3) The interior is equipped with a high temperature recovery unit (7) and a medium and low temperature recovery unit (8). The medium and low temperature recovery unit (8) is equipped with a plate heat exchange component (9). The main shell (3) of the heat recovery exchanger is fixedly equipped with a temperature zone partition plate (10). The high temperature recovery unit (7) and the medium and low temperature recovery unit (8) are equipped with control components on the outside. The control components include a controller (11). The controller (11) is equipped with multiple connection lines (12) on the outside. The other end of the multiple connection lines (12) is connected to a flow control valve (13) and a temperature sensor (14).
2. A high efficiency energy saving refrigeration system based on heat recovery as claimed in claim 1 wherein: The high-temperature recovery unit (7) includes a copper threaded tube (71), with an inlet pipe (72) and an outlet pipe (73) fixed at both ends of the copper threaded tube (71).
3. A high-efficiency energy-saving refrigeration system based on heat recovery according to claim 2, characterized in that: One end of the inlet pipe (72) and the outlet pipe (73) both extend outside the main housing (3) of the heat recovery exchanger and are fixedly connected to the main housing (3) of the heat recovery exchanger.
4. A high-efficiency energy-saving refrigeration system based on heat recovery according to claim 1, characterized in that: The medium-low temperature recovery unit (8) includes a hot water storage tank (81), which is fixedly installed inside the main shell (3) of the heat recovery exchanger. The hot water storage tank (81) is provided with an inlet (82) and an outlet (83) at the top and bottom of the hot water storage tank (81), respectively.
5. A high-efficiency energy-saving refrigeration system based on heat recovery according to claim 4, characterized in that: The inlet (82) and outlet (83) both extend out of the main housing (3) of the heat recovery exchanger and are fixedly connected to the main housing (3).
6. A highly efficient and energy saving refrigeration system based on heat recovery as claimed in claim 1 wherein: The plate heat exchange component (9) includes a heat exchange plate (91), which is located inside the hot water storage tank (81). One end of the heat exchange plate (91) is fixedly provided with a connecting outer circular block (92), and an external threaded ring (93) is sleeved on the outside of the connecting outer circular block (92). An internal threaded ring (94) is sleeved on the outside of the external threaded ring (93).
7. A high-efficiency energy-saving refrigeration system based on heat recovery according to claim 6, characterized in that: The external threaded ring (93) is sleeved on the outside of the connecting outer circular block (92) and connected to the connecting outer circular block (92) through a bearing. The external threaded ring (93) and the internal threaded ring (94) are connected by threads. The internal threaded ring (94) is fixedly installed inside the main housing (3) of the heat recovery exchanger.
8. A high-efficiency energy-saving refrigeration system based on heat recovery according to claim 1, characterized in that: Multiple flow control valves (13) and temperature sensors (14) are respectively fixedly sleeved on the outside of the water inlet pipe (72), water outlet pipe (73), water inlet (82), and water outlet (83).