Compact condenser evaporator with small charge volume

Abstract

The present invention discloses a compact condenser evaporator with a small filling volume, comprising a cylindrical body, both ends of the body are open, the inner wall is fixed with a first tube sheet and a second tube sheet and connected with a first head and a second head; an inferior arcuate notch is formed between the upper part of the first tube sheet and the body, a semicircular notch is formed between the second tube sheet and the body, a plurality of heat exchange tubes with open ends arranged at intervals are installed between the first tube sheet and the second tube sheet by using the heat exchange tube installation holes on the tube sheet, the upper end of the second tube sheet is connected with a partition plate arranged along the axis of the body, the partition plate forms two upper and lower separated cavities in the inner cavity of the body, the heat exchange tube is located in the lower cavity, the inferior arcuate notch is opposite to the semicircular notch and corresponds to the upper cavity, so that the upper cavity is connected with the arc cavity formed by the two heads on the outer sides of the two tube sheets; a high-temperature circulation gas outlet pipe, a high-temperature circulation liquid inlet pipe, a low-temperature circulation liquid outlet pipe and a low-temperature circulation gas inlet pipe are arranged on the body. The present invention has a compact structure and reduces the filling volume of the refrigerant.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration, and in particular to a compact condenser evaporator with a small filling volume. Background Art

[0002] In a large cascade refrigeration system, the gas discharged from the low-temperature refrigeration compressor and the liquid after throttling and depressurization of the high-temperature cycle enter the condenser evaporator. The two refrigerants exchange heat in the condenser evaporator, the high-temperature cycle refrigerant evaporates, and the low-temperature cycle refrigerant condenses. The existing condenser evaporator has a complex structure, large dimensions, a large amount of refrigerant filling, many consumables, and a large heat transfer temperature difference, which leads to a decrease in heat transfer performance, an increase in the pressure ratio of the high and low temperature cycle refrigeration compressor, a decrease in the performance of the cascade refrigeration system, and an increase in energy consumption. Therefore, it is necessary to develop a compact condenser evaporator with a small filling volume to improve the heat transfer efficiency of the condenser evaporator, reduce the filling volume of the refrigerant, reduce the initial investment, and improve the safety and thermal performance of the refrigeration system. Summary of the invention

[0003] The purpose of the present invention is to provide a compact condenser evaporator with a small filling volume for refrigeration in order to solve the problem of efficient heat transfer in the condensation and evaporation process of high and low temperature circulating working fluids, reduce the filling volume of refrigerant, improve the performance of the refrigeration system, and save energy in order to address the technical defects existing in the prior art.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A compact condenser evaporator with a small filling volume comprises a hollow cylindrical body, with open ends at the two ends of the body, and inner walls of which are respectively fixed with a first tube sheet and a second tube sheet, and connected with a first head and a second head; an inferior arcuate notch is formed between the upper portion of the first tube sheet and the body, and a semicircular notch is formed between the second tube sheet and the body, and a plurality of heat exchange tubes with open ends and arranged at intervals are installed between the first tube sheet and the second tube sheet using heat exchange tube installation holes on the tube sheets, and the upper end of the second tube sheet is connected to a partition plate arranged along the axis of the body, and the partition plate forms two upper and lower separated cavities in the inner cavity of the body, and the heat exchange tube is located in the lower cavity, and the inferior arcuate notch is opposite to the semicircular notch and corresponds to the upper cavity, so that the upper cavity is communicated with the arc cavity formed by the two heads on the outer sides of the two tube sheets; a high-temperature circulation air outlet pipe, a high-temperature circulation liquid inlet pipe, a low-temperature circulation liquid outlet pipe and a low-temperature circulation air inlet pipe are arranged on the body.

[0006] The high-temperature circulating gas outlet pipe is connected to a hole opened on the upper part of the cylinder near the first end cap, and the high-temperature circulating liquid inlet pipe is connected to a hole opened on the upper part of the cylinder near the second end cap.

[0007] The partition plate is rectangular, and its edges are respectively connected to the axial inner wall of the middle part of the cylinder, the first tube sheet and the second tube sheet.

[0008] The two ends of the heat exchange tube pass through the corresponding heat exchange tube holes of the second tube sheet and the first tube sheet respectively, and are sealed with the heat exchange tube holes of the second tube sheet and the first tube sheet.

[0009] Among them, the low-temperature circulation liquid outlet pipe is located at the bottom of the cylinder and is connected to the corresponding orifice of the cylinder; the low-temperature circulation air inlet pipe is located on the cylinder close to the partition plate and below the lower surface of the partition plate, and is connected to the corresponding orifice of the cylinder.

[0010] The compact condenser evaporator with a small filling volume of the present invention utilizes the siphon principle and has a compact structure, reduces the filling volume of the refrigerant, reduces the initial investment, solves the problem of efficient heat transfer in the condensation and evaporation process of high and low temperature circulating media, improves the performance of the refrigeration system, and saves energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Shown is a schematic diagram of a small-filling-volume compact condenser-evaporator of the present invention;

[0012] Figure 2 Shown Figure 1 AA view. DETAILED DESCRIPTION

[0013] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] like Figure 1 and Figure 2 As shown, the small filling amount compact condenser evaporator of the present invention comprises:

[0015] High temperature circulation gas outlet pipe 1, cylinder 2, high temperature circulation liquid inlet pipe 3, second head 4, second tube sheet 5, low temperature circulation liquid outlet pipe 6, heat exchange tube 7, first tube sheet 8, partition plate 9, first head 10, low temperature circulation gas inlet pipe 11.

[0016] The cylinder 2 is a hollow cylindrical shape with open ends, and is welded to the first head 10 and the second head 4 respectively; the high-temperature circulation gas outlet pipe 1 is welded to the orifice opened in the upper part of the cylinder 2 near the first head 10, and the high-temperature circulation liquid inlet pipe 3 is welded to the orifice opened in the upper part of the cylinder 2 near the second head 4.

[0017] The first tube sheet 8 is circular with an inferior arch-shaped notch on the upper part, and is provided with a penetrating heat exchange tube hole at the lower part, and its edge is welded to the inner wall of one end of the cylinder 2; the second tube sheet 5 is semicircular, corresponding to the heat exchange tube hole of the first tube sheet 8, and is provided with a penetrating heat exchange tube hole with a consistent axis, and its edge is welded to the inner wall of the other end of the cylinder 2.

[0018] The first tube sheet 8 is higher than the second tube sheet 5 to prevent the high-temperature circulating liquid from flowing back to the space between the first head 10 and the first tube sheet 8. The liquid level is controlled by a sensor to control the liquid supply and cannot exceed the higher part of the first tube sheet 8.

[0019] Among them, the partition plate 9 is rectangular, and its edges are welded to the axial inner wall in the middle of the cylinder 2, the first tube sheet 8 and the second tube sheet 5 respectively. The partition plate forms two upper and lower independent cavities separated from each other in the inner cavity of the cylinder, which are used for the circulation of low-temperature circulating medium and high-temperature circulating medium respectively. The heat exchange tube is located in the lower cavity, and the lower cavity is connected to the low-temperature circulating air inlet pipe 11 and the low-temperature circulating liquid outlet pipe 6. The upper cavity and the cavity formed by the two heads are connected to the high-temperature circulating air outlet pipe 1 and the high-temperature circulating liquid inlet pipe 3. The lower part of the cavity formed by the two heads is connected to the inside of the heat exchange tube to realize the flow of high-temperature circulating medium.

[0020] Both ends of the heat exchange tube 7 pass through the heat exchange tube holes of the second tube sheet 5 and the first tube sheet 8 respectively, are located in the cylinder 2 at the lower part of the partition plate 9, and are sealed with the heat exchange tube holes of the second tube sheet 5 and the first tube sheet 8.

[0021] Among them, the low-temperature circulation liquid outlet pipe 6 is located at the bottom of the cylinder 2 and is welded to the corresponding hole of the cylinder 2. The low-temperature circulation air inlet pipe 11 is located at the cylinder 2 near the partition plate 9 and is located below the lower surface of the partition plate and is welded to the corresponding hole of the cylinder 2.

[0022] When the refrigeration system is running, the gas discharged from the low-temperature refrigeration compressor enters the space outside the cylinder 2, the partition plate 9, the second tube sheet 5, the first tube sheet 8 and the heat exchange tube 7 through the low-temperature circulation inlet pipe 11, and the liquid that releases heat and condenses goes to the low-temperature circulation liquid outlet pipe 6 and enters the low-temperature circulation throttling and pressure reduction element; the liquid after throttling and pressure reduction of the high-temperature circulation enters the space of the cylinder 2, the partition plate 9, and the first tube sheet 8 through the high-temperature circulation liquid inlet pipe 3, flows to the second head and the second tube sheet 5 space, enters the heat exchange tube 7 to exchange heat with the low-temperature circulation working fluid outside the tube, and the gas-liquid mixture that absorbs heat and evaporates enters the space between the first head 10 and the first tube sheet 8, and the liquid entrained by the gas enters the cylinder space above the partition plate 9, the gas and liquid are separated, and the liquid flows to the second head and the second tube sheet 5 space, and the gas goes to the high-temperature circulation refrigeration compressor through the high-temperature circulation outlet pipe 1.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A compact condenser evaporator with small filling volume, It is characterized in that The heat exchange tube of the embodiment of the present invention comprises a hollow cylindrical cylinder, the two ends of the cylinder are open, the inner walls are respectively fixed with a first tube sheet and a second tube sheet, and are connected with a first head and a second head; an inferior arcuate notch is formed between the upper part of the first tube sheet and the cylinder, and a semicircular notch is formed between the second tube sheet and the cylinder; a plurality of heat exchange tubes with open ends and arranged at intervals are installed between the first tube sheet and the second tube sheet by using the heat exchange tube installation holes on the tube sheet; the upper end of the second tube sheet is connected to a partition plate arranged along the axis of the cylinder, and the partition plate forms two upper and lower separated cavities in the cylinder inner cavity; the heat exchange tube is located in the lower cavity, the inferior arcuate notch is opposite to the semicircular notch and corresponds to the upper cavity, so that the upper cavity is connected with the arc cavity formed by the two heads on the outer sides of the two tube sheets; a high-temperature circulation gas outlet pipe, a high-temperature circulation liquid inlet pipe, a low-temperature circulation liquid outlet pipe and a low-temperature circulation gas inlet pipe are arranged on the cylinder; The high-temperature circulation gas outlet pipe is connected to the hole opened on the upper part of the cylinder near the first head, and the high-temperature circulation liquid inlet pipe is connected to the hole opened on the upper part of the cylinder near the second head; the partition plate is rectangular, and the edges are respectively connected to the axial inner wall of the middle part of the cylinder, the first tube sheet and the second tube sheet.

2. The compact condenser evaporator with small filling volume according to claim 1, It is characterized in that The two ends of the heat exchange tube pass through the corresponding heat exchange tube holes of the second tube sheet and the first tube sheet respectively, and are sealed and matched with the heat exchange tube holes of the second tube sheet and the first tube sheet.

3. The compact condenser evaporator with small filling volume according to claim 1, It is characterized in that The low-temperature circulation liquid outlet pipe is located at the bottom of the cylinder and connected to the corresponding orifice of the cylinder; the low-temperature circulation air inlet pipe is located on the cylinder near the partition plate and below the lower surface of the partition plate, and connected to the corresponding orifice of the cylinder.

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