Combined type heat exchange equipment
By using a composite structure of a vertical ejector evaporator absorber and a vertical generator condenser, and by utilizing ejector components and a shell-and-tube heat exchanger design, the problems of large footprint and low efficiency of existing heat exchange equipment are solved, achieving efficient refrigerant recycling and heat transfer.
Patent Information
- Application Number
- CN202423120199.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing heat exchange equipment occupies a large area and has low heat exchange efficiency, resulting in heat loss and making it difficult to effectively utilize the cooling capacity of the refrigerant.
It adopts a composite structure of vertical ejector evaporator absorber and vertical generator condenser. Through the design of ejector assembly and shell-and-tube heat exchanger, it realizes efficient recycling of refrigerant and heat transfer, and reduces the equipment footprint.
It improves refrigeration efficiency, reduces energy consumption, reduces equipment costs, solves the problems of large equipment footprint and heat loss, and enhances overall heat exchange efficiency.
Smart Images
Figure CN223550675U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of heat exchange equipment, specifically relating to a composite heat exchange device. Background Technology
[0002] Existing heat exchange equipment typically consists of multiple components, including a generator, condenser, evaporator, and absorber. These components work together in a thermodynamic cycle to achieve phase transitions of the working fluid. In this cycle, the generator's main function is to decompose the rich liquid into a lean liquid and a refrigerant; the condenser liquefies the refrigerant; the evaporator uses the liquefied refrigerant to cool the refrigerant; and the absorber recovers the refrigerant from the lean liquid and regenerates the rich liquid, thus completing the entire heat exchange process. This equipment plays a crucial role in heat transfer and conversion in industrial production and refrigeration systems.
[0003] However, existing heat exchange equipment also has some shortcomings. First, the various components of the equipment are usually distributed in different areas of the production site, resulting in a large footprint and causing inconvenience to production layout and maintenance. Second, these devices are prone to heat loss during the heat exchange process, making it difficult to effectively utilize the cooling capacity of the refrigerant and reducing the overall heat exchange efficiency. Therefore, there is an urgent need to develop a comprehensive, space-saving, and highly efficient composite heat exchange device to optimize the thermodynamic cycle process and improve the overall system performance. Utility Model Content
[0004] The purpose of this invention is to provide a composite heat exchange device in order to solve the above-mentioned problems.
[0005] This utility model achieves the above objectives through the following technical solutions:
[0006] A composite heat exchange device includes a vertical ejector evaporator absorber and a vertical generator-condenser. The cylinder of the vertical generator-condenser has a generating section and a condensing section arranged sequentially from bottom to top. The cylinder of the vertical ejector evaporator absorber also has an evaporating section and an absorption section arranged sequentially from bottom to top. The liquid refrigerant outlet of the condensing section is connected to the refrigerant inlets of the absorption section and the evaporating section, respectively. The rich liquid outlet of the absorption section is connected to the rich liquid inlet of the generating section. Each of the generating section, condensing section, absorption section, and evaporating section has a plurality of vertical heat exchange tubes built inside. Baffles are provided on the outside of the heat exchange tubes in the generating section, condensing section, and evaporating section.
[0007] The top end of the heat exchange tube in the generating section is connected to the bottom end of the heat exchange tube in the condensing section through a chamber one. The top end of the heat exchange tube in the evaporating section is connected to the bottom end of the heat exchange tube in the absorption section through a chamber two. A diversion and pressure reducing pipeline is provided between the condensing section and the evaporating and absorption sections. A solution pump is provided between the absorption section and the generating section. An ejector assembly is provided on the lean liquid inlet at the top of the absorption section. The ejector assembly is located between the lean liquid inlet at the top of the absorption section and the lean liquid outlet at the bottom of the generating section.
[0008] As a further optimization of the present invention, the heat exchange tubes of the generating section and the evaporating section are both single straight tubes, and the heat exchange tubes of the condensing section and the absorption section are both shell-and-tube tubes, wherein the shell-and-tube tubes are composed of an inner tube and an outer tube.
[0009] As a further optimization of the present invention, the absorption section includes a drainage chamber, an absorption chamber, a collection chamber and a gas collection chamber separated from bottom to top by a plurality of tube sheets, and the collection chamber is provided with a liquid collection tank;
[0010] The upper and lower outlets of the inner tube of the absorption section are connected to the gas collection chamber and the second chamber, respectively, and the upper and lower outlets of the outer tube are connected to the collection chamber and the liquid discharge chamber, respectively.
[0011] As a further optimization of the present invention, the condensation section includes a drain chamber, a condensation chamber and a reflux chamber arranged sequentially from bottom to top;
[0012] The upper and lower outlets of the inner tube of the condensing section are connected to the reflux chamber and chamber one, respectively, and the upper and lower outlets of the outer tube are connected to the reflux chamber and the exhaust chamber, respectively. The upper outlet of the inner tube is higher than the upper inlet of the outer tube.
[0013] The liquid refrigerant outlet of the condensing section's drainage chamber is connected to a diversion and pressure-reducing pipeline, and the two ends of the diversion and pressure-reducing pipeline are respectively connected to the absorption section and the evaporation section. The solution pump is located between the rich liquid outlet of the absorption section and the rich liquid inlet of the generation section.
[0014] As a further optimization of the present invention, the ejector assembly includes a diffuser tube, a buffer tube, a reduced diameter tube, a mixing chamber and an air inlet chamber that are sequentially connected to a liquid collection tank. The air inlet chamber is provided with a nozzle section, a variable diameter section and a straight pipe section, and the air inlet chamber is connected to an absorption chamber and a gas collection chamber, respectively.
[0015] As a further optimization of the present invention, both the generating section and the evaporating section include three chambers separated by two tube sheets, with the heat exchange tube located in the middle chamber and connecting the upper and lower chambers.
[0016] The beneficial effects of this utility model are as follows:
[0017] 1) This utility model divides the refrigerant formed in the condensation section into two paths and depressurizes it. One path serves as the cold source for the absorption section, replacing the circulating water. It absorbs heat outside the pipes in the absorption section, causing pool-type boiling and phase change, becoming a low-pressure gaseous refrigerant. Its heat transfer efficiency will be greatly improved, thus improving the refrigeration efficiency. Moreover, as a liquid refrigerant produced by the equipment itself, its temperature is stable and it is minimally affected by the high temperature in summer. The low-pressure gaseous refrigerant after phase change is then introduced into the absorption section for absorption and can continue to be recycled. This not only improves the heat exchange rate but also saves on the layout of circulating water-related pipelines.
[0018] 2) This utility model replaces the pressure reducing valve with an ejector assembly, using the high-pressure lean liquid as the ejector source to eject the low-pressure gaseous refrigerant and the low-pressure room-temperature gaseous refrigerant in the absorption section. The three undergo adiabatic absorption in the ejector assembly and form a medium-pressure rich liquid in the absorption section. Due to the setting of the ejector assembly, the absorption pressure is increased and the absorption efficiency is improved. At the same time, after absorption, it becomes a medium-pressure rich liquid, which can reduce the load of the subsequent solution pump to pressurize it and send it to the generation section, save the power required by the solution pump, and reduce the energy consumption of the equipment.
[0019] 3) The heat exchange tube in the absorber of this utility model is a sleeve composed of an inner tube and an outer tube. Under the action of the ejector assembly, the refrigerant flows upward along the inner tube and, together with the coolant on the outside of the outer tube, cools the gas-liquid mixture. The remaining cold energy contained in the low-pressure, low-temperature gaseous refrigerant is used to cool down the absorption section, which not only improves the absorption efficiency but also makes full use of the energy inside the equipment.
[0020] 4) This utility model integrates all equipment into two vertical heat exchangers, a solution pump, and several pipelines, reducing the cost of equipment and pipelines. The equipment structure is very compact, greatly reducing the footprint of the equipment and solving the problem of limited space in projects already in production. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the working state of the composite heat exchange device of this utility model;
[0022] Figure 2 This is a schematic diagram of the ejector assembly structure of this utility model.
[0023] In the diagram: 1. Generating section; 2. Condensing section; 3. Absorption section; 4. Evaporation section; 5. Diverting and pressure reducing pipeline; 6. Solution pump; 7. Ejector assembly; 11. Liquid collection chamber; 12. Generating chamber; 13. Chamber 1; 14. Generating section tube sheet; 15. Generating section heat exchange tube; 16. Generating section baffle; 21. Drainage chamber; 22. Condensing chamber; 23. Recirculation chamber; 24. Condensing section first tube sheet; 25. Condensing section second tube sheet; 26. Condensing section inner tube; 27. Condensing section outer tube; 28. Condensing section baffle; 31. Drainage chamber; 32. Absorption chamber; 33. Collection chamber; 34. Gas collection chamber; 35. Absorption section first... 36. Tube sheet; 37. Inner tube of the absorption section; 38. Outer tube of the absorption section; 39. Liquid collection tank; 41. Liquid accumulation chamber; 42. Evaporation chamber; 43. Second chamber; 44. Evaporation section tube sheet; 45. Evaporation section heat exchange tube; 46. Evaporation section baffle; 71. Inlet chamber; 72. Straight tube section; 73. Variable diameter section; 74. Nozzle section; 75. Mixing chamber; 76. Reduced diameter tube; 77. Buffer tube; 78. Diffuser; D. Liquid distributor; V. Vent; H. Heat source; W. Circulating water; C. Coolant; R. Refrigerant; M. Medium-pressure gas-liquid mixture; L1. Rich liquid; L2. Lean liquid. Detailed Implementation
[0024] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.
[0025] Example
[0026] like Figure 1 As shown, this embodiment relates to a composite heat exchange device, which includes a vertical ejector evaporator absorber and a vertical generator condenser. The vertical generator condenser is used to decompose the rich liquid and cool the refrigerant R, preferably ammonia. The vertical ejector evaporator absorber is used to convert the lean liquid into the rich liquid and to use the refrigerant R to perform heat exchange on the heat transfer medium C.
[0027] The vertical generator-condenser shell has a generating section 1 and a condensing section 2 arranged sequentially from bottom to top. The vertical ejector evaporator-absorber shell has an evaporating section 4 and an absorption section 3 arranged sequentially from bottom to top. The liquid refrigerant outlet of the condensing section 2 is connected to the refrigerant inlets of the absorption section 3 and the evaporating section 4, respectively. The rich liquid outlet of the absorption section 3 is connected to the rich liquid inlet of the generating section 1. Each of the generating section 1, condensing section 2, absorption section 3, and evaporating section 4 has several vertical heat exchange tubes built inside. Baffles are provided on the outside of the heat exchange tubes of the generating section 1, condensing section 2, and evaporating section 4. A diversion and pressure reducing pipeline 5 is provided between the liquid refrigerant outlet of the condensing section 2 and the refrigerant inlets of the absorption section 3 and the evaporating section 4. A solution pump 6 is provided between the rich liquid outlet of the absorption section 3 and the rich liquid inlet of the generating section 1.
[0028] The top of the generating section 1 has a chamber 13, and the top of the evaporating section 4 has a chamber 43. The top of the heat exchange tube of the generating section 1 is connected to the bottom of the heat exchange tube of the condensing section 2 through the chamber 13. The top of the heat exchange tube of the evaporating section 4 is connected to the bottom of the heat exchange tube of the absorption section 3 through the chamber 43. An ejector assembly 7 is provided on the lean liquid inlet at the top of the absorption section 3. The ejector assembly 7 is located between the lean liquid inlet at the top of the absorption section 3 and the lean liquid outlet at the bottom of the generating section 1.
[0029] During unit operation, the generating section 1 decomposes the high-pressure rich liquid L1 pumped by the solution pump 6 through its internal heat exchange tubes, generating high-pressure gaseous refrigerant R and high-pressure lean liquid L2. A heat source H is introduced into the generating section 1 during the decomposition of the high-pressure rich liquid L1. The condensing section 2 cools the high-pressure gaseous refrigerant R through its internal heat exchange tubes, forming high-pressure liquid refrigerant R. Circulating water W is introduced into the condensing section 2 during the cooling of the high-pressure gaseous refrigerant R. The lean liquid outlet of the generating section 1 is connected to the absorption section 3 for enriching the refrigerant R, and high-pressure lean liquid L2 can be supplied to the absorption section 3.
[0030] The liquid refrigerant outlet of condensing section 2 is connected to the liquid refrigerant outlet of the heat exchange tubes within condensing section 2, enabling the high-pressure liquid refrigerant R to be introduced into the diversion and pressure-reducing pipeline 5. The diversion and pressure-reducing pipeline 5 is equipped with expansion valves A and B. The diversion and pressure-reducing pipeline 5 divides the high-pressure liquid refrigerant R into two streams: low-pressure, low-temperature liquid refrigerant R and low-pressure liquid refrigerant R. These two streams of refrigerant enter the absorption section 3 and evaporation section 4 respectively, displacing the heat in these sections. The low-pressure, low-temperature liquid refrigerant R absorbs heat in the heat exchange tubes of evaporation section 4 and vaporizes, cooling the refrigerant C and forming low-pressure, low-temperature gaseous refrigerant R. The low-pressure, low-temperature gaseous refrigerant R enters the absorption section 3 from the heat exchange tubes of evaporation section 4, then flows upwards through the heat exchange tubes of absorption section 3, utilizing its remaining cooling capacity to lower the temperature of absorption section 3 and converting into low-pressure, room-temperature gaseous refrigerant R. The low-pressure liquid refrigerant R enters the heat exchange tube of the absorption section 3, absorbs heat and vaporizes, and is converted into low-pressure gaseous refrigerant R.
[0031] The lean liquid inlet of absorption section 3 is equipped with an ejector assembly 7. The ejector assembly 7 is used to extract the two streams of refrigerant R from generation section 1, which enter absorption section 3 and evaporation section 4, from absorption section 3. This allows the two streams of refrigerant R to mix with the lean liquid generated in generation section 1 and be introduced into the heat exchange tubes of absorption section 3. Specifically, the two streams of refrigerant R entering absorption section 3 and evaporation section 4 are both in a gaseous state when extracted by the ejector assembly 7. They are respectively low-pressure, room-temperature gaseous refrigerant R and low-pressure gaseous refrigerant R. These two streams mix with high-pressure lean liquid L2 in the ejector assembly 7 to form a medium-pressure gas-liquid mixture M. This medium-pressure gas-liquid mixture M enters the heat exchange tubes of absorption section 3 and gradually transforms into medium-pressure rich liquid L1. Solution pump 6 extracts the medium-pressure rich liquid L1 from absorption section 3, forming high-pressure rich liquid L1. Under the action of solution pump 6, high-pressure rich liquid L1 enters generation section 1, realizing the recycling of refrigerant R.
[0032] Specifically, please refer to Figure 1 and Figure 2 The liquid refrigerant outlet of condensing section 2 is connected to the refrigerant inlet of absorption section 3 and evaporation section 4 respectively. The rich liquid outlet of absorption section 3 is connected to the rich liquid inlet of generation section 1. Generation section 1, condensing section 2, absorption section 3 and evaporation section 4 all have internal heat exchanger pipes. The absorption section 3 includes a drain chamber 31, an absorption chamber 32, a collection chamber 33, and a gas collection chamber 34 arranged sequentially from bottom to top. The above chambers are separated by tube sheets. The absorption section 3 also includes a first absorption section tube sheet 35 fixed at the lower end of the drain chamber 31 and the upper end of the collection chamber 33, a second absorption section tube sheet 36 fixed at the upper and lower ends of the absorption chamber 32, multiple inner absorption section tubes 37 fixed between the two first absorption section tube sheets 35, an outer absorption section tube 38 fixed between the two second absorption section tube sheets 36 and corresponding to the inner absorption section tubes 37, and a liquid collection tank 39 fixed inside the collection chamber 33. The outer absorption section tube 38 and the inner absorption section tube 37 on its inner side form the sleeve of the absorption section 3. This sleeve is the heat exchange tube of the absorption section 3.
[0033] The liquid collection tank 39 is connected to the outlet of the ejector assembly 7 and the inlet of the outer tube 38 of the absorption section. The outlet of the outer tube 38 of the absorption section is connected to the drain chamber 31. The inlet and outlet of the inner tube 37 of the absorption section are connected to the evaporation section 4 and the gas collection chamber 34, respectively. The two second tube sheets 36 of the absorption section seal the upper and lower ends of the absorption chamber 32. The liquid collection tank 39 is fixedly installed on the upper second tube sheet 36 of the absorption section. The two first tube sheets 35 of the absorption section cooperate with the two second tube sheets 36 of the absorption section to seal the drain chamber 31 and the collection chamber 33. The upper end of the gas collection chamber 34 is fixedly provided with an upper end cap. The diversion pressure reducing pipeline 5 has two branch pipes connected to the second chamber 43 and the absorption chamber 32, respectively. The two branch pipes are respectively equipped with expansion valve A and expansion valve B. Expansion valve A and expansion valve B are connected to the evaporation section 4 and the absorption section 3, respectively. Expansion valve B is connected to the absorption chamber 32.
[0034] The ejector assembly 7 includes an air inlet chamber 71, a mixing chamber 75 located at the outlet of the air inlet chamber 71, a reducing pipe 76 located at the outlet of the mixing chamber 75, a buffer pipe 77 located at the outlet of the reducing pipe 76, and a diffuser pipe 78 located at the outlet of the buffer pipe 77. The diffuser pipe 78 is connected to the liquid collection tank 39. One end of the air inlet chamber 71 is provided with a straight pipe section 72, and the other end of the air inlet chamber 71 is provided with a nozzle section 74. The straight pipe section 72 is connected to the lean liquid outlet of the generating section 1. The outlet of the nozzle section 74 is connected to the inlet of the mixing chamber 75. A reducing section 73 is provided between the nozzle section 74 and the straight pipe section 72, and the inner diameter of the inlet of the nozzle section 74 is smaller than the inner diameter of the outlet of the straight pipe section 72. The nozzle section 74 is connected to the absorption chamber 32 and the gas collection chamber 34.
[0035] The low-pressure liquid refrigerant R in the diversion and pressure reducing line 5 enters the absorption section 3 from one side of the absorption chamber 32 and flows upward. The low-pressure liquid refrigerant R absorbs heat and boils in the absorption chamber 32 to form a low-pressure gaseous refrigerant R. The low-pressure low-temperature liquid refrigerant R in the diversion and pressure reducing line 5 enters the evaporation section 4 and forms a low-pressure liquid refrigerant R. After absorbing heat, the low-pressure liquid refrigerant R forms a low-pressure low-temperature gaseous refrigerant R. The low-pressure low-temperature gaseous refrigerant R enters the absorption section 3 from the lower inlet of the inner tube 37 of the absorption section and flows upward. The low-pressure low-temperature gaseous refrigerant R absorbs heat from the liquid in the outer tube 38 of the absorption section in the inner tube 37 of the absorption section and forms a low-pressure room-temperature gaseous refrigerant R in the gas collecting chamber 34.
[0036] The high-pressure lean liquid L2 at the outlet of the generating section 1 flows through the pipeline between the ejector assembly 7 and the generating section 1 to the straight pipe section 72, and then enters the nozzle section 74 through the reducing section 73. During the flow of the high-pressure lean liquid L2, a negative pressure is formed in the inlet chamber 71, which draws the low-pressure ambient temperature gaseous refrigerant R and the low-pressure gaseous refrigerant R into the nozzle section 74. The high-pressure lean liquid L2 mixes with the low-pressure ambient temperature gaseous refrigerant R and the low-pressure gaseous refrigerant R in the mixing chamber 75 to form a medium-pressure gas-liquid mixture M. The medium-pressure gas-liquid mixture M passes through the buffer pipe 77 and the diffuser pipe 7. After 8, it enters the liquid collection tank 39 and then flows from top to bottom along the outer pipe 38 of the absorption section. During the flow of the medium-pressure gas-liquid mixture M, the low-pressure liquid refrigerant R and the low-pressure low-temperature gaseous refrigerant R that did not enter the ejector assembly 7 absorb the heat in the medium-pressure gas-liquid mixture M in the absorption chamber 32, so that the medium-pressure gas-liquid mixture M is quickly converted into medium-pressure rich liquid L1. The rich liquid outlet of the absorption section 3 is located on the side wall of the drain chamber 31. The medium-pressure rich liquid L1 flows out from the lower end outlet of the outer pipe 38 of the absorption section and is converted into high-pressure rich liquid L1 by the solution pump 6, and returns to the generating section 1.
[0037] Furthermore, the condensing section 2 includes an exhaust chamber 21, a condensing chamber 22, and a return chamber 23 arranged sequentially from bottom to top, separated by tube sheets. The condensing section 2 also includes a first tube sheet 24 fixed to the lower end of the exhaust chamber 21 and the upper end of the return chamber 23; a second tube sheet 25 fixed to the upper and lower ends of the condensing chamber 22; multiple inner tubes 26 fixed between the two first tube sheets 24; outer tubes 27 fixed between the two second tube sheets 25 and corresponding one-to-one with the inner tubes 26; and several staggered baffles 28 fixed inside the condensing chamber 22. The outer tubes 27 and the inner tubes 26 form a sleeve for the condensing section 2, which is the heat exchange tube of the condensing section 2.
[0038] Two second tube sheets 25 of the two condensing sections seal the upper and lower ends of the condensing chamber 22. Two first tube sheets 24 of the two condensing sections, in conjunction with the two second tube sheets 25, seal the drain chamber 21 and the return chamber 23. The top of the return chamber 23 is provided with an upper end cap. The inlet and outlet of the inner tube 26 of the condensing section are connected to the generating section 1 and the return chamber 23, respectively. The outlet of the inner tube 26 of the condensing section is a vent hole V opened on the upper side wall of the inner tube 26 of the condensing section, which is located in the return chamber 23. The inlet and outlet of the outer tube 27 of the condensing section are connected to the return chamber 23 and the drain chamber 21, respectively. Multiple outer tubes 27 of the condensing section all penetrate the baffles 28 of each condensing section. The inner tube 37 of the absorption section penetrates the outer tube 38 of the absorption section, and the inner tube 26 of the condensing section penetrates the outer tube 27 of the condensing section. Annular gaps are formed between the inner tube 37 and the outer tube 38 of the absorption section, and between the inner tube 26 and the outer tube 27 of the condensing section.
[0039] The generating section 1 includes a collection chamber 11, a generating chamber 12, and a chamber 13 arranged sequentially from bottom to top. These chambers are separated by tube sheets, with generating chamber 12 being the intermediate chamber of generating section 1. The generating section 1 also includes generating section tube sheets 14 fixed at the upper and lower ends of generating chamber 12, and multiple generating section heat exchange tubes 15 fixed between two generating section tube sheets 14. Each generating section heat exchange tube 15 is a single straight tube, which is the heat exchange tube of generating section 1.
[0040] The inlet and outlet of the heat exchange tube 15 in the generating section are connected to chamber 13 and the liquid collection chamber 11, respectively. The rich liquid inlet of the generating section 1 is located on the side wall of chamber 13, the inlet of the heat exchange tube 15 in the generating section is located at its upper end, and the outlet of the heat exchange tube 15 in the generating section is located at its lower end. Several alternating generating section baffles 16 are provided inside the generating chamber 12, and multiple generating section heat exchange tubes 15 pass through each generating section baffle 16. Two generating section tube sheets 14 seal the upper and lower ends of the generating chamber 12. A lower end cap is provided at the bottom of the liquid collection chamber 11, and the lean liquid outlet of the generating section 1 is located at the bottom of the lower end cap of the generating section 1. The drain chamber 21 is located above chamber 13.
[0041] Evaporation section 4 includes, from bottom to top, a liquid accumulation chamber 41, an evaporation chamber 42, and a second chamber 43, with evaporation chamber 42 being the intermediate chamber. The chambers are separated by tube sheets. Evaporation section 4 also includes evaporation section tube sheets 44 located at the upper and lower ends of evaporation chamber 42, and multiple evaporation section heat exchange tubes 45 fixed between the two tube sheets 44. The inlets of the evaporation section heat exchange tubes 45 are connected to the second chamber 43, with the inlets located at the upper end. Several intersecting evaporation section baffles 46 are provided inside evaporation chamber 42, and the multiple evaporation section heat exchange tubes 45 all pass through each of the baffles 46. Each evaporation section heat exchange tube 45 is a single straight tube, which constitutes the heat exchange tube of evaporation section 4.
[0042] Two evaporator tube sheets 44 seal the upper and lower ends of the evaporator chamber 42, and the bottom of the liquid accumulation chamber 41 is provided with a lower end cap. The drain chamber 31 is located above the second chamber 43. In other embodiments, the generating section 1, condensing section 2, and evaporating section 4 can be replaced with other existing refrigerant generating equipment, condensing equipment, and evaporating equipment. In other embodiments, a liquid distributor D can also be provided inside the second chamber 43, which is connected to the upper end of the heat exchange tubes 45 of each evaporator section. The top of the liquid distributor D is provided with a through hole for the low-pressure, low-temperature gaseous refrigerant R to flow upward.
[0043] During the decomposition of high-pressure rich liquid L1, high-pressure rich liquid L1 enters the generating section 1 from chamber 13 and flows into the generating chamber 12 from the upper inlet of the generating section heat exchange tube 15. Heat source H is introduced into the generating chamber 12. Heat source H flows downward in an S-shape along the generating section baffle 16. After being heated, high-pressure rich liquid L1 decomposes into high-pressure lean liquid L2 and high-pressure gaseous refrigerant R. The high-pressure lean liquid L2 flows from the lean liquid outlet of the lower end cap of the generating section 1 to the straight pipe section 72 of the ejector assembly 7. The high-pressure gaseous refrigerant R flows from the upper end of the generating section heat exchange tube 15 to the lower inlet of the first tube sheet 24 of the condensing section 2.
[0044] When the condensing section 2 cools the high-pressure gaseous refrigerant R, circulating water W is introduced into the condensing chamber 22. The circulating water W flows upward in an S-shape along the baffle plate 28 of the condensing section, cooling the high-pressure gaseous refrigerant R in the heat exchange tube 15 of the generating section. As the high-pressure gaseous refrigerant R flows upward, it gradually liquefies into high-pressure liquid refrigerant R. The high-pressure liquid refrigerant R is sprayed into the return flow chamber 23 from the vent hole V and flows to the upper inlet of the outer tube 27 of the condensing section. Then, the high-pressure liquid refrigerant R flows along the inner wall of the outer tube 27 of the condensing section to the drain chamber 21, and flows into the diversion and pressure reducing pipeline 5 under the pressure in the condensing section 2, and is divided into low-pressure low-temperature liquid refrigerant R and low-pressure liquid refrigerant R.
[0045] After the low-pressure liquid refrigerant R enters the absorption section 3, it enters the evaporation section 4 from chamber 43. A refrigerant C is introduced into the evaporation chamber 42 of the evaporation section 4. The refrigerant C flows downwards in an S-shape along the baffle plate 46 of the evaporation section. The low-pressure liquid refrigerant R, entering the evaporation section 4, is distributed to the heat exchange tubes 45 of each evaporation section by the liquid distributor D, cooling the refrigerant C and vaporizing into low-pressure gaseous refrigerant R. The low-pressure gaseous refrigerant R then passes upwards through the liquid distributor D and enters the absorption section 3, cooling the absorption section 3.
[0046] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A composite heat exchange device, characterized in that: The device includes a vertical ejector evaporator absorber and a vertical generator-condenser. The cylinder of the vertical generator-condenser has a generating section and a condensing section arranged sequentially from bottom to top. The cylinder of the vertical ejector evaporator absorber has an evaporating section and an absorption section arranged sequentially from bottom to top. The liquid refrigerant outlet of the condensing section is connected to the refrigerant inlet of the absorption section and the evaporating section, respectively. The rich liquid outlet of the absorption section is connected to the rich liquid inlet of the generating section. The generating section, condensing section, absorption section and evaporating section each have a number of vertical heat exchange tubes built inside. The heat exchange tubes of the generating section, condensing section and evaporating section are all equipped with baffles on the outside. The top end of the heat exchange tube in the generating section is connected to the bottom end of the heat exchange tube in the condensing section through a chamber one, and the top end of the heat exchange tube in the evaporating section is connected to the bottom end of the heat exchange tube in the absorption section through a chamber two. A diversion and pressure reducing pipeline is provided between the condensing section and the evaporating and absorption sections. A solution pump is provided between the absorption section and the generating section, and an ejector assembly is provided on the lean liquid inlet at the top of the absorption section. The ejector assembly is located between the lean liquid inlet at the top of the absorption section and the lean liquid outlet at the bottom of the generating section.
2. The composite heat exchange device according to claim 1, characterized in that: The heat exchange tubes in the generating section and the evaporating section are all single straight tubes, and the heat exchange tubes in the condensing section and the absorption section are all shell-and-tube tubes, each consisting of an inner tube and an outer tube.
3. The composite heat exchange device according to claim 2, characterized in that: The absorption section includes a drainage chamber, an absorption chamber, a collection chamber, and a gas collection chamber, which are separated from bottom to top by several tube sheets. The collection chamber is equipped with a liquid collection tank. The upper and lower outlets of the inner tube of the absorption section are connected to the gas collection chamber and the second chamber, respectively, and the upper and lower outlets of the outer tube are connected to the collection chamber and the liquid discharge chamber, respectively.
4. The composite heat exchange device according to claim 3, characterized in that: The condensation section includes, from bottom to top, a drain chamber, a condensation chamber, and a reflux chamber; The upper and lower outlets of the inner tube of the condensing section are connected to the reflux chamber and chamber one, respectively, and the upper and lower outlets of the outer tube are connected to the reflux chamber and the exhaust chamber, respectively. The upper outlet of the inner tube is higher than the upper inlet of the outer tube. The liquid refrigerant outlet of the condensing section's drainage chamber is connected to a diversion and pressure-reducing pipeline, and the two ends of the diversion and pressure-reducing pipeline are respectively connected to the absorption section and the evaporation section. The solution pump is located between the rich liquid outlet of the absorption section and the rich liquid inlet of the generation section.
5. The composite heat exchange device according to claim 3, characterized in that: The ejector assembly includes a diffuser, a buffer tube, a narrowing tube, a mixing chamber, and an air inlet chamber that are sequentially connected to a liquid collection tank. The air inlet chamber is provided with a nozzle section, a diameter-reducing section, and a straight pipe section. The air inlet chamber is connected to the absorption chamber and the gas collection chamber, respectively.
6. The composite heat exchange device according to claim 3, characterized in that: Both the generating section and the evaporating section include three chambers separated by two tube sheets, with the heat exchange tubes located in the middle chamber and connecting the upper and lower chambers.