Efficient heat exchange tube device for coil evaporative condenser

Abstract

The invention discloses an efficient heat exchange tube device for a coil evaporation type condenser, and relates to the technical field of heat exchange tubes, the efficient heat exchange tube device comprises an outer frame and a variable-diameter evaporation cooling coil fixedly assembled on the outer frame, and the top end and the bottom end of the side wall of the outer frame are provided with a refrigerant gas collection bag and a refrigerant liquid collection bag respectively; a refrigerant gas inlet is formed in the refrigerant gas collection bag, and a refrigerant liquid falling opening is formed in the refrigerant liquid collection bag; the variable-diameter evaporation cooling coil pipe comprises an upper coil pipe section and a lower coil pipe section, the input end of the upper coil pipe section is communicated with the refrigerant gas collecting bag, and the output end of the lower coil pipe section is communicated with the refrigerant liquid collecting bag; the pipe diameter of the upper coil pipe section is larger than that of the lower coil pipe section. The area of high-temperature refrigerant gas and spraying water is increased through the large-diameter upper coil pipe section, so that the heat exchange efficiency is improved, and the flow speed of refrigerant liquid is increased through the small-diameter lower coil pipe section, so that the backflow speed of the refrigerant liquid is increased.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange tubes, in particular to a high-efficiency heat exchange tube device for a coil evaporative condenser. Background Art

[0002] The evaporative condenser is the main heat exchange equipment in the refrigeration system. Its working principle is: the superheated high-pressure refrigerant gas discharged from the compressor in the refrigeration system passes through the evaporative cooling coil in the evaporative condenser, so that the high-temperature gaseous refrigerant exchanges heat with the spray water and air outside the evaporative cooling coil. That is, the gaseous refrigerant enters the discharge pipe from the top and is gradually condensed into liquid refrigerant from top to bottom.

[0003] The diameters of the evaporative cooling coils of existing heat exchange equipment are uniform, which cannot take into account both the evaporation efficiency and the reflux rate of the liquid refrigerant, and the overall heat exchange efficiency needs to be improved. Summary of the invention

[0004] The object of the present invention is to provide a high-efficiency heat exchange tube device for a coil evaporative condenser to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: The present invention provides a high-efficiency heat exchange tube device for a coil evaporative condenser, comprising an outer frame and a variable-diameter evaporative cold coil fixedly mounted on the outer frame, wherein a refrigerant gas collecting bag and a refrigerant liquid collecting bag are respectively arranged at the top and bottom ends of the side wall of the outer frame, wherein a refrigerant gas collecting bag is provided with a refrigerant air inlet, and a refrigerant liquid collecting bag is provided with a refrigerant liquid outlet; The variable diameter evaporative cooling coil comprises an upper coil section and a lower coil section, the input end of the upper coil section is connected to the refrigerant gas collecting bag, and the output end of the lower coil section is connected to the refrigerant liquid collecting bag; The diameter of the upper coil section is larger than that of the lower coil section, and a partition assembly is provided in the upper coil section, and the partition assembly partitions the upper coil section into a plurality of spiral channels; It also includes a spraying mechanism, which is used to spray cooling water onto the variable-diameter evaporative cooling coil.

[0006] Furthermore, the diameter of the upper coil section is 31.79 mm, and the diameter of the lower coil section is 21.6 mm.

[0007] Furthermore, the upper coil section includes a plurality of outer transverse pipe sections and an outer curved pipe section for connecting adjacent outer transverse pipe sections, and the partition assembly partitions the inner portion of the outer transverse pipe section to form a plurality of the spiral channels.

[0008] Furthermore, the partition assembly includes a spiral sheet, which is rotatably disposed in the outer transverse tube section and can rotate around the central axis of the outer transverse tube section, and the spiral sheet divides the outer transverse tube section into a plurality of the spiral channels.

[0009] Furthermore, the outer side edge of the spiral sheet is in close contact with the inner wall of the outer transverse tube section.

[0010] Furthermore, the partition assembly also includes an inner coil arranged in the upper coil section, and an annular gap is formed between the inner coil and the upper coil. The inner coil includes an inner transverse tube section arranged in the outer transverse tube section, and an inner bend tube section arranged in the outer bend tube section for connecting adjacent inner transverse tube sections. The inner transverse tube section is rotatably connected to the inner bend tube section through a sealing rotating assembly, and the spiral sheet is fixedly welded to the outer wall of the inner transverse tube section. The spiral sheet is also provided with a liquid guide channel connected to the interior of the inner transverse tube section. The inner transverse tube at the top is sealed at one end close to the refrigerant gas collecting bag.

[0011] Furthermore, the output end of the inner bend pipe section at the bottom extends to the upper coil section and is rotatably connected to a liquid blocking plug, the outer wall of the liquid blocking plug is tightly attached to the inner wall of the inner bend pipe section, the interior of the liquid blocking plug is hollow to form a liquid blocking cavity, the liquid blocking cavity is connected to the output end of the inner bend pipe section at the bottom, the liquid blocking plug is evenly provided with first connecting holes on the side away from the inner bend pipe section, and the liquid blocking plug is evenly provided with second connecting holes on the side close to the inner bend pipe section.

[0012] Furthermore, the transverse cross-section of the spiral sheet is in the shape of an arc, and the liquid-conducting channel is in the shape of an arc.

[0013] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects: 1. The present invention increases the area of ​​high-temperature refrigerant gas and spray water by using a thick-diameter upper coil section, thereby improving heat exchange efficiency, and increases the flow rate of refrigerant liquid by using a thin-diameter lower coil section, thereby improving the reflux rate of the refrigerant liquid.

[0014] 2. The spiral blades of the present invention can scrape off the refrigerant liquid attached to the inner wall of the outer transverse tube section, so as to avoid the barrier of the refrigerant liquid attached to the inner wall of the outer transverse tube section, which affects the subsequent heat exchange effect between the high-temperature refrigerant gas and the external spray water; In the above process, on the one hand, a part of the refrigerant liquid can enter the inner coil through the liquid guide channel under the gas pressure in the upper coil section, thereby reducing the content of the refrigerant liquid in the upper coil section, thereby increasing the contact area between the subsequent high-temperature refrigerant gas and the inner wall of the upper coil section, thereby improving the heat exchange efficiency between the high-temperature refrigerant gas and the external spray water; On the other hand, it can push another part of the refrigerant liquid to flow toward the lower coil section, so that the refrigerant liquid quickly flows into the lower coil section and quickly returns to the evaporator through the refrigerant drop port; 3. The present invention provides a liquid blocking plug. When the refrigerant liquid in the inner coil enters the liquid blocking cavity, it can quickly fill up the liquid blocking cavity, so that the liquid blocking cavity forms a liquid seal, and thus to a certain extent, it can prevent the refrigerant gas that has not undergone phase change and condensation from entering the lower coil section, thereby extending the residence time of the high-temperature refrigerant gas in the upper coil section, and further improving the heat exchange efficiency between the high-temperature refrigerant gas and the external spray water.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the variable diameter evaporative cooling coil of the present invention; Figure 3 It is a schematic diagram of the side view structure of the variable diameter evaporative cooling coil of the present invention; Figure 4 It is a schematic diagram of the structure of the partition assembly of the present invention; Figure 5 It is a schematic diagram of the internal structure of the variable diameter evaporative cooling coil of the present invention; Figure 6 It is a schematic diagram of the internal structure of one of the outer transverse pipe sections of the present invention; Figure 7 yes Figure 5 Schematic diagram of the local structure at A; Figure 8 yes Figure 5 Schematic diagram of the local structure at location B.

[0018] In the figure: 1-outer frame; 2-variable diameter evaporative cooling coil; 21-upper coil section; 211-outer transverse pipe section; 212-outer curved pipe section; 22-lower coil section; 3-refrigerant gas collecting bag; 31-refrigerant air inlet; 4-refrigerant liquid collecting bag; 41-refrigerant liquid outlet; 5-partitioning assembly; 51-spiral channel; 52-spiral sheet; 521-liquid guide channel; 53-inner coil; 531-inner transverse pipe section; 532-inner curved pipe section; 6-liquid blocking plug; 61-liquid blocking cavity; 62-first connecting hole; 63-second connecting hole. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0020] See also Figure 1-Figure 8 The present invention provides a high-efficiency heat exchange tube device for a coil evaporative condenser, comprising an outer frame 1 and a variable-diameter evaporative cold coil 2 fixedly mounted on the outer frame 1, a refrigerant gas collecting bag 3 and a refrigerant liquid collecting bag 4 are respectively arranged at the top and bottom ends of the side wall of the outer frame 1, a refrigerant gas collecting bag 3 is arranged on the refrigerant gas collecting bag 3, and a refrigerant liquid collecting bag 4 is arranged on the refrigerant liquid collecting bag 4. like Figure 1 As shown, the variable diameter evaporative cooling coil 2 includes an upper coil section 21 and a lower coil section 22, the input end of the upper coil section 21 is connected to the refrigerant gas collecting bag 3, and the output end of the lower coil section 22 is connected to the refrigerant liquid collecting bag 4; like Figure 2-Figure 4 As shown, the diameter of the upper coil section 21 is larger than that of the lower coil section 22, and a partition assembly 5 is disposed in the upper coil section 21, and the partition assembly 5 divides the upper coil section 21 into a plurality of spiral channels 51; The high-efficiency heat exchange tube device further comprises a spray mechanism (not shown), which is used to spray cooling water onto the variable-diameter evaporative cooling coil 2 .

[0021] When in use, cooling water is sprayed onto the variable diameter evaporative cooling coil 2 by the spray mechanism. When the high-temperature refrigerant gas reaches the refrigerant gas collecting bag 3 from the refrigerant air inlet 31 and is evenly distributed into the upper coil section 21 of the variable diameter evaporative cooling coil 2, due to the setting of the partition component 5, the high-temperature refrigerant gas can flow in a spiral shape in the upper coil section 21, so that the high-temperature refrigerant gas can fully exchange heat with the external spray water. During the heat exchange process, the high-temperature refrigerant gas undergoes a phase change and condenses into a refrigerant liquid and enters the lower coil section 22. Since the diameter of the upper coil section 21 is larger than that of the lower coil section 22, the refrigerant liquid can increase the flow rate in the lower coil section 22, so that the refrigerant liquid quickly passes through the lower coil section 22 and converges into the refrigerant liquid collecting bag 4, and then returns to the evaporator through the refrigerant liquid drop port 41.

[0022] In this embodiment, the diameter of the upper coil section 21 is 31.79 mm, and the diameter of the lower coil section 22 is 21.6 mm.

[0023] like Figure 2 and Figure 3 As shown, in this embodiment, the upper coil section 21 includes a plurality of outer transverse pipe sections 211 and outer bend pipe sections 212 for connecting adjacent outer transverse pipe sections 211, and the partition assembly 5 partitions the outer transverse pipe section 211 to form a plurality of spiral channels 51.

[0024] Based on the above-mentioned arrangement, when the high-temperature refrigerant gas flows in the outer transverse pipe section 211, the high-temperature refrigerant gas can be divided into multiple strands of high-temperature refrigerant gas with spiral flows. After the high-temperature refrigerant gas flows from the outer transverse pipe section 211 to the outer bend pipe section 212, the multiple strands of high-temperature refrigerant gas with spiral flows will be mixed in the outer bend pipe section 212. When the mixed high-temperature refrigerant gas in the outer bend pipe section 212 enters the next section of the outer transverse pipe section 211, it will be redivided into multiple strands of high-temperature refrigerant gas with spiral flows. In this way, the high-temperature refrigerant gas is mixed with each other during the flow of the upper coil section 21, so that the high-temperature refrigerant gas can more fully exchange heat with the external spray water, thereby improving the heat exchange efficiency and thus improving the phase change condensation rate of the high-temperature refrigerant gas.

[0025] like Figure 4 and Figure 5 As shown, in this embodiment, the partition assembly 5 includes a spiral sheet 52, which is rotatably disposed in the outer transverse tube section 211 and can rotate around the central axis of the outer transverse tube section 211. The spiral sheet 52 divides the outer transverse tube section 211 into a plurality of spiral channels 51 (such as Figure 3 as shown).

[0026] Based on the above-mentioned arrangement, when the high-temperature refrigerant gas enters the upper coil section 21, the spiral blades 52 can rotate under the impact of the gas, thereby stirring the high-temperature refrigerant gas to a certain extent, thereby further improving the heat exchange efficiency between the high-temperature refrigerant gas and the external spray water, thereby increasing the phase change condensation rate of the high-temperature refrigerant gas.

[0027] Furthermore, the outer side edge of the spiral sheet 52 is in close contact with the inner wall of the outer transverse pipe section 211 .

[0028] Based on the above-mentioned arrangement, during the rotation of the spiral blade 52, the spiral blade 52 can scrape off the refrigerant liquid attached to the inner wall of the outer transverse pipe section 211 to avoid the obstruction of the refrigerant liquid attached to the inner wall of the outer transverse pipe section 211, affecting the subsequent heat exchange effect between the high-temperature refrigerant gas and the external spray water.

[0029] In addition, when the spiral blade 52 scrapes off the refrigerant liquid attached to the inner wall of the outer cross pipe section 211, the spiral blade 52 can gather the refrigerant liquid and push the refrigerant liquid toward the lower coil section 22, so that the refrigerant liquid can quickly flow into the lower coil section 22 and quickly return to the evaporator through the refrigerant drop port 41.

[0030] like Figure 4 and Figure 6 As shown, in this embodiment, the partition assembly 5 also includes an inner coil 53 arranged in the upper coil section 21, and an annular gap is formed between the inner coil 53 and the upper coil. The inner coil 53 includes an inner transverse tube section 531 arranged in the outer transverse tube section 211, and an inner bend tube section 532 arranged in the outer bend tube section 212 for connecting adjacent inner transverse tube sections 531. The inner transverse tube sections 531 and the inner bend tube sections 532 are rotationally connected through a sealing rotating assembly. The spiral sheet 52 is fixedly welded to the outer wall of the inner transverse tube section 531. The spiral sheet 52 is also provided with a liquid guide channel 521 connected to the interior of the inner transverse tube section 531. The inner transverse tube at the top is sealed at one end close to the refrigerant gas collecting bag 3.

[0031] like Figure 6 As shown, in this embodiment, the transverse cross-section of the spiral sheet 52 is in the shape of an arc, and the liquid-conducting channel 521 is in the shape of an arc.

[0032] Based on the above-mentioned arrangement, when the high-temperature refrigerant gas enters the upper coil section 21, the impact of the gas can cause the spiral blades 52 and the inner transverse tube section 531 to rotate together. During this process, the spiral blades 52 can gather the refrigerant liquid attached to the inner wall of the outer transverse tube section 211 on one side of the spiral blades 52, and under the gas pressure in the upper coil section 21, a part of the refrigerant liquid enters the inner coil 53 through the liquid guide channel 521, thereby reducing the content of the refrigerant liquid in the upper coil, thereby increasing the contact area between the subsequent high-temperature refrigerant gas and the inner wall of the upper coil section 21, thereby improving the heat exchange efficiency between the high-temperature refrigerant gas and the external spray water.

[0033] like Figure 4 and Figure 7 As shown, in this embodiment, the output end of the inner bend pipe section 532 at the bottom extends to the upper coil section 21 and is rotatably connected to a liquid blocking plug 6, the outer wall of the liquid blocking plug 6 is tightly attached to the inner wall of the inner bend pipe section 532, the interior of the liquid blocking plug 6 is hollow to form a liquid blocking cavity 61, and the liquid blocking cavity 61 is connected to the output end of the inner bend pipe section 532 at the bottom, and the first connecting holes 62 are evenly arranged on the side of the liquid blocking plug 6 away from the inner bend pipe section 532, and the second connecting holes 63 are evenly arranged on the side of the liquid blocking plug 6 close to the inner bend pipe section 532.

[0034] Based on the above-mentioned arrangement, since the volume of the liquid-blocking cavity 61 is relatively small, when the refrigerant liquid in the inner coil 53 enters the liquid-blocking cavity 61, it can quickly fill up and fill up the liquid-blocking cavity 61, so that the liquid-blocking cavity 61 forms a liquid seal, thereby to a certain extent preventing the refrigerant gas that has not undergone phase change and condensation from entering the lower coil section 22, thereby prolonging the residence time of the high-temperature refrigerant gas in the upper coil section 21, and further improving the heat exchange efficiency between the high-temperature refrigerant gas and the external spray water.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-efficiency heat exchange tube device for a coil evaporative condenser, characterized in that: It comprises an outer frame and a variable diameter evaporative cooling coil fixedly mounted on the outer frame, the top and bottom ends of the side wall of the outer frame are respectively provided with a refrigerant gas collecting bag and a refrigerant liquid collecting bag, the refrigerant gas collecting bag is provided with a refrigerant air inlet, and the refrigerant liquid collecting bag is provided with a refrigerant liquid outlet; The variable diameter evaporative cooling coil comprises an upper coil section and a lower coil section, the input end of the upper coil section is connected to the refrigerant gas collecting bag, and the output end of the lower coil section is connected to the refrigerant liquid collecting bag; The diameter of the upper coil section is larger than that of the lower coil section, and a partition assembly is provided in the upper coil section, and the partition assembly partitions the upper coil section into a plurality of spiral channels; It also includes a spray mechanism, which is used to spray cooling water onto the variable-diameter evaporative cooling coil.

2. The high-efficiency heat exchange tube device for a coil evaporative condenser according to claim 1, characterized in that: The diameter of the upper coil section is 31.79 mm, and the diameter of the lower coil section is 21.6 mm.

3. The high-efficiency heat exchange tube device for a coil evaporative condenser according to claim 1, characterized in that: The upper coil section includes a plurality of outer transverse pipe sections and an outer curved pipe section for connecting adjacent outer transverse pipe sections, and the partition assembly partitions the inner portion of the outer transverse pipe section to form a plurality of the spiral channels.

4. The high-efficiency heat exchange tube device for the coil evaporative condenser according to claim 3, characterized in that: The partition assembly comprises a spiral sheet, which is rotatably arranged in the outer transverse tube section and can rotate around the central axis of the outer transverse tube section. The spiral sheet divides the outer transverse tube section into a plurality of spiral channels.

5. The high-efficiency heat exchange tube device for the coil evaporative condenser according to claim 4, characterized in that: The outer side edge of the spiral sheet is closely attached to the inner wall of the outer transverse pipe section.

6. The high-efficiency heat exchange tube device for the coil evaporative condenser according to claim 5, characterized in that: The partition assembly also includes an inner coil arranged in the upper coil section, and an annular gap is formed between the inner coil and the upper coil. The inner coil includes an inner transverse tube section arranged in the outer transverse tube section, and an inner bend tube section arranged in the outer bend tube section for connecting adjacent inner transverse tube sections. The inner transverse tube section is rotatably connected to the inner bend tube section via a sealing rotating assembly. The spiral sheet is fixedly welded to the outer wall of the inner transverse tube section. The spiral sheet is also provided with a liquid guide channel connected to the interior of the inner transverse tube section. The inner transverse tube at the top is sealed at one end close to the refrigerant gas collecting bag.

7. The high-efficiency heat exchange tube device for a coil evaporative condenser according to claim 6, characterized in that: The output end of the inner bend pipe section at the bottom extends to the upper coil section and is rotatably connected to a liquid blocking plug, the outer wall of the liquid blocking plug is tightly attached to the inner wall of the inner bend pipe section, the interior of the liquid blocking plug is hollow to form a liquid blocking cavity, the liquid blocking cavity is connected to the output end of the inner bend pipe section at the bottom, the liquid blocking plug is evenly provided with first connecting holes on the side away from the inner bend pipe section, and the liquid blocking plug is evenly provided with second connecting holes on the side close to the inner bend pipe section.

8. The high-efficiency heat exchange tube device for a coil evaporative condenser according to claim 6, characterized in that: The transverse cross section of the spiral sheet is in an arc shape, and the liquid guiding channel is in an arc shape.

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