Flooded evaporator for R245fa high-temperature heat pump unit

Abstract

The utility model discloses a flooded evaporator for an R245fa high-temperature heat pump unit, relates to the technical field of high-temperature heat pumps, and aims to solve the problems that the improvement of the energy efficiency of a high-temperature heat pump unit system is limited due to lower heat transfer efficiency of an existing dry-type evaporator, and the heat transfer efficiency is low. In order to solve the problems that the reliable operation of a compressor and the performance of a heat pump system are affected due to the fact that the superheat degree of a working medium outlet of an ordinary flooded evaporator is small or no superheat degree exists in the working medium outlet of the evaporator, return air of the compressor carries liquid or a liquid working medium is condensed in the compression process, and the reliable operation of the compressor and the performance of the heat pump system are affected. A first tube plate and a second tube plate are fixedly connected to the two ends of the outer side of the barrel respectively, a supporting plate is fixedly connected to the center of the interior of the barrel, a supporting plate pull rod is fixedly connected to the interior of the supporting plate, and an overheating heat exchange tube and a flooded evaporation tube are installed between the first tube plate and the second tube plate; and a liquid homogenizing plate is fixedly connected to the other side of the interior of the cylinder body. And the effects of improving the energy efficiency and realizing reliable performance are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high temperature heat pump technical field especially is a kind of full-liquid evaporator for R245fa high temperature heat pump unit. BACKGROUND

[0002] In industrial field, the utilization of low-grade heat pump such as waste heat and residual heat is paid more and more attention, and it is an effective way to realize the utilization of low-grade heat energy through high temperature heat pump unit. At present, the circulating working medium used in high temperature heat pump unit is more common with R245fa. Due to the thermodynamic characteristics of R245fa, most of the high temperature heat pump units use dry evaporator as heat exchanger on heat source side. However, the heat transfer efficiency of dry evaporator is low, which limits the improvement of system energy efficiency of high temperature heat pump unit. Compared with dry evaporator, full-liquid evaporator has higher heat transfer coefficient and smaller heat transfer temperature difference, which can make the energy efficiency of heat pump unit more excellent. However, if ordinary full-liquid evaporator is used, the superheat degree of working medium outlet of evaporator will be small or there will be no superheat degree, which will cause liquid to be brought back by compressor or liquid working medium to be condensed in compression process, thereby affecting the reliable operation of compressor and the performance of heat pump system. How to improve evaporator to adapt to the improvement of energy efficiency of R245fa high temperature heat pump unit and solve the problem of system reliability has become a technical problem. SUMMARY

[0003] The utility model aims at providing a kind of full-liquid evaporator for R245fa high temperature heat pump unit.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A kind of full-liquid evaporator for R245fa high temperature heat pump unit, including cylinder, the two ends of the outer side of the cylinder are fixedly connected with first tube plate and second tube plate, defoaming device assembly and flow guide plate are installed on one side in the cylinder, the center in the cylinder is fixedly connected with support plate, support plate pull rod is fixedly connected in the inside of the support plate, superheated heat exchange pipe and full-liquid evaporator pipe are installed between the first tube plate and the second tube plate, liquid equalizing plate is fixedly connected on the other side in the cylinder.

[0006] By adopting the above technical scheme, the setting of superheated pipe is beneficial to improve the outlet superheat degree of R245fa, and the structure inside the cylinder is more stable and reliable, improving the overall performance.

[0007] Further, the inside of the cylinder is fixedly connected with pipe stopper, the same defoaming device end sealing plate is fixedly connected at the two ends outside the defoaming device assembly, the same defoaming device side sealing plate is fixedly connected at the other two ends outside the defoaming device assembly, the same liquid equalizing plate end sealing plate is fixedly connected at the two ends outside the liquid equalizing plate.

[0008] By adopting the technical scheme, the defoaming device is arranged, and vaporizer gas liquid carry-over is completely avoided, so that use and operation are facilitated.

[0009] Further, the outer side of the first tube plate is fixedly connected with a liquid level meter sleeve assembly, the inside of the liquid level meter sleeve assembly is provided with an electronic liquid level meter, and the outer side of the cylinder body is reserved with an R245fa gas outlet.

[0010] By adopting the technical scheme, through the arrangement of multiple groups of partition ribs and multiple-pass partition ribs, multi-pass design is realized, and the heat of a large temperature difference and small flow heat source can be extracted.

[0011] Further, the outer side of the first tube plate is fixedly connected with a liquid level meter sleeve assembly, the inside of the liquid level meter sleeve assembly is provided with an electronic liquid level meter, and the outer side of the cylinder body is reserved with an R245fa gas outlet.

[0012] By adopting the technical scheme, through the arrangement of multiple groups of partition ribs and multiple-pass partition ribs, multi-pass design is realized, and the heat of a large temperature difference and small flow heat source can be extracted.

[0013] Further, the outer side of the second tube plate is provided with a second water chamber end cover, the outer side of the cylinder body is fixedly connected with an R245fa liquid inlet, the inside of the second water chamber end cover is fixedly connected with third-pass partition ribs and fourth-pass partition ribs, and the second water chamber end cover and the second tube plate are detachably connected through bolts and nuts.

[0014] By adopting the technical scheme, the inside can be conveniently cleaned and maintained, and use and operation are facilitated.

[0015] The beneficial technical effects of the utility model are as follows.

[0016] 1. The arrangement of the superheating pipe is beneficial to improving the R245fa gas overheating degree.

[0017] 2. The arrangement of the superheating heat exchange pipe is beneficial to improving the heat transfer temperature difference of the superheating heat exchange pipe, improving the heat transfer efficiency of the superheating heat exchange pipe, and improving the R245fa gas overheating degree.

[0018] 3. The arrangement of the multiple-pass partition ribs realizes multi-pass design, and is beneficial to extracting the heat of a large temperature difference and small flow heat source.

[0019] 4. The arrangement of the defoaming device completely avoids vaporizer gas liquid carry-over.

[0020] 5. By setting the liquid level meter, the liquid level in the flooded evaporator is controlled to avoid liquid from being taken out by gas due to high liquid level. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Cross-sectional structure diagram of the utility model Figure 1 ;

[0022] Figure 2 Left view structure diagram of the utility model

[0023] Figure 3 Right view structure diagram of the utility model

[0024] Figure 4 Cross-sectional structure diagram of the utility model Figure 2 .

[0025] In the figure, 1, first water chamber end cover; 2, first tube plate; 3, charge valve joint seat; 4, safety valve joint seat; 5, cylinder; 6, demister assembly; 7, flow guide plate; 8, R245fa gas outlet; 9, baffle pipe; 10, support plate; 11, superheated heat exchange pipe; 12, demister end sealing plate; 13, second tube plate; 14, second water chamber end cover; 15, liquid equalizing plate end sealing plate; 16, liquid equalizing plate; 17, support plate pull rod; 18, flooded evaporator pipe; 19, R245fa liquid inlet; 20, electronic liquid level meter; 21, liquid level meter sleeve assembly; 22, demister side sealing plate; 101, water inlet; 102, water outlet; 103, first partial range transverse partition; 104, first partial range vertical partition; 105, second partial range transverse partition; 1401, third partial range transverse partition; 1402, fourth partial range transverse partition. DETAILED DESCRIPTION

[0026] The utility model will be further explained in detail in combination with the drawings.

[0027] Referring to Figures 1-4 A kind of flooded evaporator for R245fa high-temperature heat pump unit, including cylinder 5, the two ends of the outer side of cylinder 5 are fixedly connected with first tube plate 2 and second tube plate 13, one side in the inside of cylinder 5 is equipped with demister assembly 6 and flow guide plate 7, the center in the inside of cylinder 5 is fixedly connected with support plate 10, support plate 10 is fixedly connected with support plate pull rod 17 in the inside, superheated heat exchange pipe 11 and flooded evaporator pipe 18 are installed between first tube plate 2 and second tube plate 13, another side in the inside of cylinder 5 is fixedly connected with liquid equalizing plate 16, the inside of cylinder 5 is fixedly connected with baffle pipe 9, the two ends of demister assembly 6 outer side are fixedly connected with identical demister end sealing plate 12, the other two ends of demister assembly 6 outer side are fixedly connected with identical demister side sealing plate 22, the two ends of liquid equalizing plate 16 outer side are fixedly connected with identical liquid equalizing plate end sealing plate 15.

[0028] As Figures 1-4 As shown in the figure, one end of the outer side of the cylinder body 5 is fixedly connected with the safety valve joint seat 4 and the charging valve joint seat 3, the outer side of the first tube plate 2 is installed with the first water chamber end cover 1, the outer side of the first water chamber end cover 1 is reserved with the water inlet 101 and the water outlet 102, the inner side of the first water chamber end cover 1 is fixedly connected with the first partial cross rib 103, the first partial vertical rib 104 and the second partial cross rib 105, the first water chamber end cover 1 and the first tube plate 2 are detachably connected through bolts and nuts, the outer side of the first tube plate 2 is fixedly connected with the liquid level meter sleeve assembly 21, the inside of the liquid level meter sleeve assembly 21 is installed with the electronic liquid level meter 20, the outer side of the cylinder body 5 is reserved with the R245fa gas outlet 8, the outer side of the second tube plate 13 is installed with the second water chamber end cover 14, the outer side of the cylinder body 5 is fixedly connected with the R245fa liquid inlet 19, the inside of the second water chamber end cover 14 is fixedly connected with the third partial cross rib 1401 and the fourth partial cross rib 1402, the second water chamber end cover 14 and the second tube plate 13 are detachably connected through bolts and nuts.

[0029] The implementation principle of the embodiment is that the liquid enters the inside of the first water chamber end cover 1 through the water inlet 101, and sequentially passes through the superheating heat exchange pipe 11 and the first water chamber end cover 1, and then is discharged from the water outlet 102 after returning to the first water chamber end cover 1 from the superheating heat exchange pipe 11, while the liquid distribution plate 16 inside the cylinder body 5 enables the refrigerant to be uniformly distributed in the inside of the cylinder body 5 under the action of the liquid distribution plate 16, and to be gasified after heat exchange with the liquid in the superheating heat exchange pipe 11, the gasified gas is discharged through the R245fa gas outlet 8 after rising, while the water inlet and outlet are upper inlet and lower outlet, which is conducive to improving the heat transfer temperature difference of the superheating heat exchange pipe 11, improving the heat transfer efficiency of the superheating heat exchange pipe 11, and improving the gas overheating degree of the R245fa, while the electronic liquid level meter 20 is increased inside to control the liquid level in the full-liquid evaporator to avoid liquid carry-over caused by too high liquid level.

[0030] The embodiments of the specific embodiment are the preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A flooded evaporator for R245fa high temperature heat pump units comprising a shell (5) characterised in that: The both ends of the outer side of the cylinder (5) are fixedly connected with the first tube plate (2) and the second tube plate (13) respectively, one side of the inside of the cylinder (5) is provided with the demister assembly (6) and the guide plate (7), the center of the inside of the cylinder (5) is fixedly connected with the support plate (10), the inside of the support plate (10) is fixedly connected with the support plate pull rod (17), the first tube plate (2) and the second tube plate (13) are provided with the superheated heat exchange pipe (11) and the full-liquid evaporation pipe (18), the other side of the inside of the cylinder (5) is fixedly connected with the liquid equalizing plate (16).

2. The flooded evaporator for R245fa high-temperature heat pump units of claim 1, wherein: The inside of the cylinder (5) is fixedly connected with the pipe baffle (9), the both ends of the outside of the demister assembly (6) are fixedly connected with the same demister end sealing plate (12) respectively, the other two ends of the outside of the demister assembly (6) are fixedly connected with the same demister side sealing plate (22) respectively, the both ends of the outside of the liquid equalizing plate (16) are fixedly connected with the same liquid equalizing plate end sealing plate (15) respectively.

3. The flooded evaporator for R245fa high-temperature heat pump units of claim 1, wherein: One end of the outside of the cylinder (5) is fixedly connected with the safety valve joint seat (4) and the charging valve joint seat (3), the outside of the first tube plate (2) is provided with the first water chamber end cover (1), the outside of the first water chamber end cover (1) is reserved with the water inlet (101) and the water outlet (102), the inside of the first water chamber end cover (1) is fixedly connected with the first partial cross partition (103), the first partial vertical partition (104) and the second partial cross partition (105), the first water chamber end cover (1) and the first tube plate (2) are detachably connected through bolts and nuts.

4. The flooded evaporator for R245fa high-temperature heat pump units of claim 1, wherein: The outside of the first tube plate (2) is fixedly connected with the liquid level meter sleeve assembly (21), the inside of the liquid level meter sleeve assembly (21) is provided with the electronic liquid level meter (20), the outside of the cylinder (5) is reserved with the R245fa gas outlet (8).

5. The flooded evaporator for R245fa high-temperature heat pump units of claim 1, wherein: The outside of the second tube plate (13) is provided with the second water chamber end cover (14), the outside of the cylinder (5) is fixedly connected with the R245fa liquid inlet (19), the inside of the second water chamber end cover (14) is fixedly connected with the third partial cross partition (1401) and the fourth partial cross partition (1402), the second water chamber end cover (14) and the second tube plate (13) are detachably connected through bolts and nuts.

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