CN117628741A - Condenser and absorption refrigerating unit comprising same - Google Patents

Abstract

The application discloses a condenser and including its absorption refrigeration unit. The condenser comprises a shell, at least two heat exchange tube groups and at least one liquid guide plate. The liquid guide plate is disposed in the condensation plenum and between adjacent ones of the heat exchange tube groups, and is configured to flow gas and liquid along the liquid guide plate and to discharge the liquid guide plate through the fluid openings. The refrigerant liquid condensed in the condenser flows longitudinally, and is discharged out of the heat exchange tube group above the liquid guide plate in time through the liquid guide plate, so that the heat exchange efficiency of the heat exchange tube group can be improved. And because the refrigerant gas in the condenser transversely flows along the horizontal direction, the non-condensable gas attached to the liquid guide plate can be timely discharged by arranging the fluid channel on the liquid guide plate, and the heat exchange efficiency of the condenser is further improved.

Description

Condenser and absorption refrigerating unit comprising same

Technical Field

The present disclosure relates to condensers, and particularly to a condenser and an absorption refrigeration unit including the same.

Background

The absorption heat exchange system is a heat exchange system consisting of an evaporator, an absorber, a condenser and a generator. The binary solution is used as working medium, wherein the low boiling point component is used as refrigerant, namely, the refrigerant is refrigerated by utilizing the evaporation of the binary solution; the high boiling point component acts as an absorbent, i.e. its absorption of the refrigerant vapor is used to complete the working cycle. Conventional absorption heat exchange systems include a condenser. The condenser is internally provided with a plurality of heat exchange tubes. The refrigerant vapor from the generator is capable of exchanging heat with the plurality of heat exchange tubes in the condenser, whereby the refrigerant vapor is condensed from a gas to a liquid.

Disclosure of Invention

The present application provides, in a first aspect, a condenser comprising a housing, at least two heat exchange tube groups, and at least one liquid guide plate. The housing includes a condensing receptacle having first and second sides opposite in a width direction, and a refrigerant inlet and a refrigerant outlet in communication with the condensing receptacle, the housing having a length direction, a width direction, and a height direction, wherein the refrigerant inlet is located at the first side. The at least two heat exchange tube groups are disposed in the condensation volume, and each group of heat exchange tube groups includes a plurality of heat exchange tubes extending along the length direction. The at least one liquid guide plate is disposed in the condensing receptacle and between adjacent ones of the heat exchange tube groups, each of the liquid guide plates extending along the length direction, wherein each of the liquid guide plates has a first end and a second end in the width direction, the first end being located on a first side of the condensing receptacle and the second end defining a fluid opening with the second side of the condensing receptacle, and wherein the liquid guide plates are configured to flow gas and liquid along the liquid guide plates and out of the liquid guide plates through the fluid opening.

According to the first aspect, the refrigerant outlet is located at the bottom of the condensation chamber. The housing further includes a non-condensable gas outlet in communication with the condensing volume, the non-condensable gas outlet being located on a first side of the condensing volume. The liquid is gathered at the bottom of the condensation cavity and is discharged out of the condensation cavity through the refrigerant outlet.

According to the first aspect, each liquid guide plate further comprises a plurality of flow channel plates arranged at intervals, a fluid channel is defined between adjacent flow channel plates, the fluid channel extends along the width direction, an inlet of the fluid channel is in fluid communication with the refrigerant inlet, and an outlet of the fluid channel is in fluid communication with the fluid opening.

According to the first aspect, each of the liquid guide plates has an upper surface and a lower surface, and a plurality of flow channel plates are disposed on each of the upper surface and the lower surface.

According to the first aspect described above, the flow passage plate is provided such that the flow area of the fluid passage in the extending direction thereof is not exactly the same.

According to the first aspect described above, each of the flow passage plates is wavy, the plurality of flow passage plates includes adjacent first and second flow passage plates, wherein the peaks of the first flow passage plate are opposed to the valleys of the second flow passage plate, and the valleys of the first flow passage plate are opposed to the peaks of the second flow passage plate, so that the flow passage forms wide and narrow passages whose flow areas alternate in the extending direction thereof.

According to the first aspect described above, the liquid guide plate is disposed obliquely with respect to the width direction, and the first end is higher than the second end so that the liquid flows along the liquid guide plate to the fluid opening.

In a second aspect, the present application provides an absorption refrigeration unit including at least one condenser. The condenser as claimed in any one of the first aspects.

According to the second aspect, the absorption refrigeration unit further includes a generator. The generator is arranged to generate a refrigerant gas, the generator comprising and two generator outlets from which the refrigerant gas generated by the generator is discharged on average. Wherein the at least one condenser comprises two condensers, the refrigerant inlet of each condenser being in fluid communication with a respective one of the generator outlets.

According to the second aspect described above, the generator defines a generator housing having the width direction. The two condensers are symmetrically disposed on both sides of the generator in the width direction.

According to the second aspect described above, the housing includes two liquid-blocking plates, each extending in the longitudinal direction and being vertically connected between the top wall and the bottom wall of the housing. The two liquid baffles are configured to define the interior of the housing into two condensation chambers and one generator chamber, the two condensation chambers being located on both sides of the generator chamber in the width direction. Wherein each liquid baffle is provided with an opening, and the opening forms the refrigerant inlet and the generator outlet.

According to the second aspect, the housing comprises two groups of louvers, each group of louvers being disposed in the opening of the corresponding liquid barrier. Wherein the louvers extend obliquely upward in a direction from the generator pocket to the condensing pocket such that the higher ends of each set of louvers form the refrigerant inlet and the lower ends of each set of louvers form the generator outlet.

Drawings

FIG. 1A is a perspective view of a heat exchanger including a condenser according to the present application at an angle;

FIG. 1B is a perspective view of another angle of the heat exchanger shown in FIG. 1A;

FIG. 2A is a perspective view of the heat exchanger shown in FIG. 1A with a portion of the housing removed;

fig. 2B is a front view of the heat exchanger shown in fig. 1A in the width direction;

FIG. 3A is a perspective view of the liquid guiding plate in FIG. 2A;

FIG. 3B is a partial top view of the liquid guide plate shown in FIG. 3A;

fig. 4 is a block diagram of an absorption refrigeration unit according to one embodiment of the present application.

Detailed Description

Various embodiments of the present application are described below with reference to the accompanying drawings, which form a part hereof. It is to be understood that, although directional terms, such as "front", "rear", "upper", "lower", "left", "right", "top", "bottom", etc., may be used in this application to describe various example structural portions and elements of the present application, these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the embodiments disclosed herein may be arranged in a number of different orientations, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1A and 1B illustrate a structure of a heat exchanger 150 including a condenser 100 according to an embodiment of the present application, wherein fig. 1A is a perspective structural view of the heat exchanger 150 from one angle seen from the right side, and fig. 1B is a perspective structural view of the heat exchanger 150 from another angle seen from the left side. As shown in fig. 1A and 1B, the heat exchanger 150 includes a housing 101. The housing 101 has a substantially rectangular parallelepiped shape and includes a longitudinal direction L, a width direction W, and a height direction H. The housing 101 includes left and right side walls 113 and 112 in the width direction W, top and bottom walls 111 and 105 provided in the height direction H, and a pair of tube sheets 102 and 103 in the length direction L. The interior of the shell 101 can define a closed cavity by left and right side walls 113 and 112, top and bottom walls 111 and 105, and a pair of tube sheets 102 and 103.

In the present embodiment, the inside of the case 101 defines two condensation chambers 231 and one generator chamber 233 (see fig. 2A) disposed side by side in the width direction W, and the generator chamber 233 is located between the two condensation chambers 231 and can be in fluid communication with each other. And the bottom wall 105 includes a left bottom plate 114, a middle bottom plate 115, and a right bottom plate 116 in the width direction W. The left bottom plate 114 and the right bottom plate 116 are used to define a condensation volume 231, respectively, and the middle bottom plate 115 is used to define a generator volume 233. In the present embodiment, the middle bottom plate 115 is located further below the left bottom plate 114 and the right bottom plate 116. And the middle bottom plate 115 is in a shape inclined downward in a direction from both ends in the length direction L toward the middle so that the middle bottom plate 115 has a lowest point in the middle in the length direction L.

The heat exchanger 150 also includes an absorbent inlet 104 and an absorbent outlet 108. The absorbent inlet 104 and the absorbent outlet 108 are in communication with the generator compartment 233 such that after a dilute solution of absorbent (in this embodiment lithium bromide) enters the generator compartment 233 from the absorbent inlet 104, the concentrated solution of absorbent is discharged from the absorbent outlet 108 after the refrigerant (in this embodiment water) that is a concentrated solution of absorbent and generates gas is evaporated. In the present embodiment, the absorbent inlet 104 is provided on the top wall 111. The absorbent outlet 108 is provided at the lowest point in the middle of the middle floor 115 to facilitate the discharge of the concentrated absorbent solution from the absorbent outlet 108. The lower bottom of the generator housing 233 than the condensing housing 231 prevents the hotter solution of the absorbent at the bottom of the generator 170 from heat exchanging with the colder solution of the refrigerant at the bottom of the condensers 100 at both sides, thereby causing heat loss.

The heat exchanger 150 also includes a refrigerant inlet 234 and a refrigerant outlet 107. The refrigerant inlet 234 and the refrigerant outlet 107 communicate with the condensation vessel 231 such that the gaseous refrigerant (water in this embodiment) is condensed into liquid refrigerant after entering the condensation vessel 231 from the refrigerant inlet 234, and then discharged from the refrigerant outlet 107. In this embodiment, the refrigerant inlet 234 is in fluid communication with the generator volume 233, such that refrigerant from the gas from the generator volume 233 can enter the condensing volume 231 through the refrigerant inlet 234. The refrigerant outlet 107 is provided at the bottoms of the left and right bottom plates 114 and 116.

The heat exchanger 150 also includes a non-condensable gas outlet 106. The non-condensable gas outlet 106 communicates with the condensing vessel 231 to discharge the non-condensable gas in the condensing vessel 231. In the present embodiment, two non-condensable gas outlets 106 are respectively disposed on the left side wall 113 and the right side wall 112, and are respectively communicated with two condensation chambers 231.

The heat exchanger 150 further comprises two sets of condenser heat exchanger bundles 124 and one set of generator heat exchanger bundles 123, the two sets of condenser heat exchanger bundles 124 being disposed in the two condensation plenums 231, respectively, and the one set of generator heat exchanger bundles 123 being disposed in the generator plenums 233. The condenser heat exchange tube bundle 124 and the generator heat exchange tube bundle 123 include a plurality of heat exchange tubes 120, each heat exchange tube 120 extending along a length direction L. Both ends in the length direction L of each heat exchange tube 120 penetrate through and are supported by the pair of tube sheets 102 and 103, respectively. The two ends of each heat exchange tube 120 are respectively in fluid communication with the heat exchange medium, so that the heat exchange medium can flow into the heat exchange tube 120 from one end of each heat exchange tube 120, exchange heat with the refrigerant through the tube wall of the heat exchange tube 120, and then flow out of the heat exchange tube 120 from the other end of the heat exchange tube 120. In this embodiment, the heat exchange tubes of the condenser heat exchange tube bundle 124 and the generator heat exchange tube bundle 123 are used to circulate the medium to be heat exchanged at different temperatures. For example, in the heat exchange tubes of the condenser heat exchange tube bundle 124, for circulating a low-temperature medium to be heat exchanged, for example, low-temperature cooling water, so that the gaseous refrigerant in the condensation vessel 231 can be condensed into liquid refrigerant. In the heat exchange tubes of the generator heat exchange tube bundle 123, a medium to be heat exchanged, for example, high-temperature heat source water, is circulated to evaporate the dilute solution in the generator chamber 233 into a concentrated solution. The condenser heat exchange tube bundle 124 includes at least two heat exchange tube groups 121, and the at least two heat exchange tube groups 121 are disposed at intervals in the height direction, each heat exchange tube group 121 including a plurality of heat exchange tubes 120 therein. In this embodiment, each set of condenser heat exchanger tube bundles 124 includes three sets of heat exchanger tube groups 121.

It will be appreciated by those skilled in the art that in the present embodiment, two condensation chambers 231 and one generator chamber 233 are integrated inside the housing 101 such that the heat exchanger 150 includes two condensers 100 and one generator 170. This arrangement reduces the distance that refrigerant gas can flow from the generator 170 into the condenser 100, prevents gas in the generator 170 from being discharged in time to raise the pressure in the generator chamber 233, further hinders the evaporation reaction in the generator 170, and saves space required for the generator 170 and the condenser 100. . In other embodiments, the condensing vessel 231 and the generator vessel 233 may also be provided in separate housings that communicate via tubing or other means to form separate condensers and generators.

Fig. 2A and 2B show the internal structure of the heat exchanger 150, wherein fig. 2A is a perspective view of the heat exchanger 150 with the tube sheet 102 and the left side wall 113 removed. Fig. 2B is a front view of the heat exchanger 150 shown in fig. 1A with the tube sheet 102 removed, i.e., a front view in the width direction. As shown in fig. 2A and 2B, the housing 101 of the heat exchanger 150 further includes two liquid blocking plates 273, and the two liquid blocking plates 273 extend in the length direction L and are vertically connected between the top wall 111 and the bottom wall 105 of the housing 101. The two liquid baffles 273 can define the interior of the housing 101 into two condensation chambers 231 and one generator chamber 233, with the generator chamber 233 being located between the two condensation chambers 231. As one example, one fluid barrier 273 is connected between the edge of the left bottom plate 114 and the top wall 111, and the other fluid barrier 273 is connected between the edge of the right bottom plate 116 and the top wall 111. Each baffle 273 has an opening 274 therein through which opening 274 fluid communication between condensation chamber 231 and generator chamber 233 is enabled.

Specifically, each condensation vessel 231 has a first side 241 and a second side 242 opposite in the width direction W. In this embodiment, the first side 241 refers to the side in the direction of the generator housing 233, i.e. the inner side. The second side 242 refers to the side facing away from the generator compartment 233, i.e. the outer side. That is, the liquid blocking plate 273 defines a first side of each of the condensation chambers 231.

The condensing vessel 231 has a refrigerant inlet 234, the refrigerant inlet 234 of the condensing vessel 231 being located at the first side 241 to receive gaseous refrigerant from the generator vessel 233. And the generator pocket 233 has a generator outlet 271. The refrigerant inlet 234 and the generator outlet 271 are in fluid communication through an opening 274 in the baffle 273. In this embodiment, a plurality of louvers 275 are disposed in openings 274 in each of the baffles 273. Each set of louvers 275 extends along a length direction L, and each set of louvers 275 includes a plurality of spaced apart, parallel strips. And the individual strips of each set of louvers 275 extend obliquely upward in an inside-out direction, i.e., from the generator compartment 233 to the condensing compartment 231. The higher ends of each set of louvers 275 form a refrigerant inlet 234 and the lower ends of each set of louvers 275 form a generator outlet 271. Thus, gaseous refrigerant from the generator volume 233 can flow from the lower end of the louvers 275 along the louvers 275 toward the upper end thereof to enter the condensing volume 231. The provision of the louvers 275 in the openings 274 can block the absorbent entrained in the gaseous refrigerant, allowing the liquid to be blocked back to the generator compartment 233, allowing the gas to enter the condensation compartment 231, preventing the absorbent from entering the condensation compartment 231 to corrode the heat exchange tubes and contaminate the refrigerant.

Thus, the gas refrigerant from the generator compartment 233 is separated from the liquid absorbent carried in the gas refrigerant in such a way that it no longer needs to flow through a long distance of flow channels, and even if the condensation compartment 231 and the generator compartment 233 are integrated in one housing 101, the flow distance of the refrigerant gas from the generator 170 into the condenser 100 is reduced, and the liquid absorbent carried in the gas refrigerant can be blocked by the louver 275.

The heat exchange tubes 120 of the condenser heat exchange tube bundle 124 are disposed between the first side 241 and the second side 242, and the condenser heat exchange tube bundle 124 is generally capable of covering a height range of the refrigerant inlet 234. Accordingly, the gas refrigerant entering the condensation vessel 231 from the refrigerant inlet 234 at the first side 241 flows in a substantially horizontal direction from the first side 241 to the second side 242 and flows through the respective heat exchange tubes 120. The gas refrigerant is condensed into a liquid refrigerant after heat exchange with each heat exchange tube 120. The liquid refrigerant flows from top to bottom by gravity and gathers at the bottom of the condensation vessel 231, thereby being discharged out of the condensation vessel 231 through the refrigerant outlet 107.

The condenser 100 further includes at least one liquid guide plate 250, each liquid guide plate 250 extending in the length direction L, and each liquid guide plate 250 being disposed in the condensation plenum 231 between adjacent heat exchange tube groups 121. Each of the liquid guide plates 250 has a first end 251 and a second end 252 in the width direction W, the first end 251 being located at the first side 241 of the condensation volume 231, and the second end 252 defining a fluid opening 253 between the edge of the second side (i.e., the left side wall 113) of the condensation volume 231. In the present embodiment, the gas and the liquid in the condensation chamber 231 can flow along the liquid guide plate 250 and be discharged out of the liquid guide plate 250 through the fluid opening 253. Wherein the gas exiting the liquid guide plate 250 exits the condensation volume 231 through the non-condensable gas outlet 106, and the liquid exiting the liquid guide plate 250 collects at the bottom of the condensation volume 231 and exits the condensation volume 231 through the refrigerant outlet 107. As an example, to facilitate the flow of liquid along the liquid guide plates 250 in the direction of the fluid openings 253, each liquid guide plate 250 is disposed obliquely with respect to the width direction W such that the first end 251 is higher than the second end 252. Also in the present embodiment, three sets of heat exchange tube groups 121 are provided in each condensing capacity 231, and two liquid guide plates 250 are provided. In some embodiments, a greater or lesser number of heat exchange tube groups 121 may be provided, with corresponding fluid transfer plates 250.

In this embodiment, the condenser 100 further includes a plurality of heat exchange tube support plates 243. These heat exchange tube support plates 243 are arranged at intervals in the length direction L. Each heat exchange tube 120 passes through the heat exchange tube support plates 243 and is fixed and supported by the heat exchange tube support plates 243 to prevent deformation of the heat exchange tube 120. In this embodiment, the heat exchange tube support plate 243 is also used to support and connect the individual liquid guide plates 250.

In the present embodiment, the gas in the condensation vessel 231 mainly includes a mixed non-condensable gas and refrigerant gas. The refrigerant gas is condensed into a liquid after heat exchange with the heat exchange tube 120. The non-condensable gas is not condensed and is easily adhered to the surface of the heat exchange tube if not timely discharged, thereby affecting the condensing pressure and heat exchange efficiency of the condenser 100. The liquid in the condensation vessel 231 is mainly the refrigerant liquid obtained after the refrigerant gas is condensed.

After the high-temperature refrigerant vapor contacts the wall surface of the low-temperature heat exchange tube, film condensation is formed on the outer wall of the heat exchange tube. The heat resistance of the outer wall of the heat exchange tube can be increased by the refrigerant liquid film formed by the refrigerant steam on the outer wall of the heat exchange tube, so that the heat exchange efficiency between the refrigerant steam and the heat exchange tube is reduced, and the heat exchange efficiency of the condenser is low. The liquid guide plate 250 can timely discharge liquid refrigerant condensed by the heat exchange tube group 121 above the liquid guide plate, so that the liquid refrigerant is prevented from continuously falling onto the heat exchange tube group 121 below, and a liquid film is formed on the heat exchange tubes 120 of the heat exchange tube group 121 below, so that the heat exchange efficiency of the heat exchange tubes is affected. And can direct the flow of non-condensable gases to the fluid opening 253, thereby discharging the non-condensable gases out of the condensing vessel 231 through the non-condensable gas outlet 106.

In this application, two condensers 100 are symmetrically disposed on both sides of the generator 170 in the width direction W of the generator 170. The generator 170 has two generator outlets 271, which are disposed on both sides in the width direction W and are in fluid communication with the refrigerant inlets 234 of one corresponding condenser 100, respectively. This arrangement enables the refrigerant gas generated by the generator 170 to be discharged from the two generator outlets 271 to the respective condensers 100 on average. In the present embodiment, the gas refrigerant generated from the generator housing 233 flows substantially horizontally in the width direction W, and in the case where the total number and total heat exchanging capacity of the heat exchanging pipes 120 in the condenser 100 are fixed, dividing one condenser into two condensers 100 and symmetrically disposed at both sides of the width direction W of the generator 170 can increase the flow area of the gas refrigerant from the generator housing 233 into the condensing housing 231 and allow the gas refrigerant to have a shorter flow distance after entering the condensing housing 231. And the non-condensable gas also has a shorter flow distance in the condensation vessel 231 so as to be more easily discharged out of the condensation vessel 231. On the one hand, the possibility that the downstream heat exchange tube 120 (i.e., the heat exchange tube 120 near the second side 242) cannot timely exchange heat with the refrigerant in the flow direction of the gas refrigerant is avoided. On the other hand, by reducing the flow rate of the refrigerant in each condensation vessel 231 while increasing the gas flow area, the flow rate of the gas refrigerant is greatly reduced, and the impact of the gas refrigerant on the heat exchange tube 120 located upstream (i.e., the heat exchange tube 120 near the first side 241) is avoided. In addition, the arrangement can discharge the gas refrigerant in the generator containing cavity 233 more timely, so that the pressure in the generator containing cavity 233 is reduced, and the efficiency of the generator is improved.

Fig. 3A and 3B show a more specific structure of the liquid guide plate 250. Fig. 3A is a perspective view of the liquid guiding plate 250, and fig. 3B is a partial top view of the liquid guiding plate 250. As shown in fig. 3A and 3B, the liquid guide plate 250 has an upper surface 363 and a lower surface 364, and a plurality of flow channel plates 354 spaced apart in a length direction L are provided on each of the upper surface 363 and the lower surface 364. Each of the flow field plates 354 extends substantially in the width direction such that fluid passages 356 extending in the width direction W are defined between adjacent flow field plates 354. Each fluid passage 356 has an inlet 361 in fluid communication with the refrigerant inlet 234 and an outlet 362 in fluid communication with the fluid opening 253. Thereby, the refrigerant gas from the refrigerant inlet 234 and the refrigerant liquid from the heat exchange tube group 121 above the liquid guide plate 250 can flow along the fluid passage 356 to the fluid opening 253. It will be appreciated by those skilled in the art that although the flow channel plate 354 is provided on both the upper surface 363 and the lower surface 364 of the liquid guide plate 250 to more conveniently guide the flow of gas and liquid along the liquid guide plate 250, in some embodiments, only the upper surface 363 of the liquid guide plate 250 may be provided with the flow channel plate 354 to form the fluid channel 356. And the fluid passage 356 may not extend entirely in the width direction as long as it is capable of guiding the flow of gas and liquid to the fluid opening 253.

The flow path plate 354 is disposed such that the flow areas of the fluid passages 356 in the extending directions thereof are not exactly the same. This arrangement can cause the refrigerant gas to form dynamic pressure variation in the flow direction thereof, thereby facilitating the driving of the flow of the non-condensable gas attached to the liquid guide plate 250. In this embodiment, each flow channel plate 354 has the same wave shape, and the wave crests and wave troughs of adjacent wave-shaped flow channel plates 354 are opposite to each other, so that the flow area of the fluid channel 356 in the extending direction thereof forms a regular change in size. Specifically, the plurality of flow channel plates 354 includes adjacent first flow channel plates 354a and second flow channel plates 354b. The peaks of the first flow field plate 354a are opposite to the valleys of the second flow field plate 354b, and the valleys of the first flow field plate 354a are opposite to the peaks of the second flow field plate 354b, so that the fluid passages 356 form wide passages 357 and narrow passages 358 having alternately changed flow areas in the extending direction thereof. Thereby, the refrigerant gas forms a regular dynamic pressure level variation in the flow direction, causing the non-condensable gas adhering to the liquid guide plate 250 to gradually flow to be accumulated at the fluid opening 253 and finally discharged from the non-condensable gas outlet 106.

Fig. 4 shows a block diagram of an absorption refrigeration unit according to one embodiment of the present application. As shown in fig. 4, the absorption chiller 480 is a lithium bromide chiller including an evaporator 483, an absorber 482, a condenser 100, a heat exchanger 481, a solution circulation pump 484, and a generator 170, which are in fluid communication via pipes. In the absorption refrigeration unit 480 of the present embodiment, water is used as a refrigerant, lithium bromide is used as an absorbent, and the change in concentration of the aqueous solution of lithium bromide and the phase change of water are used to cool the outside. In the present embodiment, the absorption refrigeration unit 480 includes two condensers 100, the two condensers 100 and the generator 170 are integrated in one housing, and the refrigerant gas generated by the generator 170 is discharged to the two condensers 100 on average.

Specifically, the concentrated lithium bromide solution absorbs water vapor from the evaporator 483 in the absorber 482 to obtain a diluted lithium bromide solution, and releases heat to the cooling water in the cooling water line 485. The dilute lithium bromide solution then enters the heat exchanger 481 by the solution circulation pump 484, absorbs heat in the heat exchanger 481 and enters the generator 170 from the absorbent inlet 104. The dilute lithium bromide solution absorbs heat from the heat source water in heat source water line 486 within generator 170 such that water in the dilute lithium bromide solution is evaporated to obtain a concentrated lithium bromide solution. The concentrated lithium bromide solution is then discharged from the generator 170 through the absorber outlet 108 to the heat exchanger 481, where heat is released in the heat exchanger 481 and returned to the absorber 482, thereby completing the cycle of the absorber lithium bromide solution.

The water vapor evaporated from the generator 170 is discharged from the generator outlet 271, enters the condenser 100 from the refrigerant inlet 234, and is condensed as liquid water by releasing heat from the condenser 100 to the cooling water in the cooling water line 485. The liquid water is discharged from the condenser 100 to the evaporator 483, and the heat of the chilled water in the chilled water line 487 is absorbed in the evaporator 483, and the liquid water is re-evaporated into water vapor, and then enters the absorber 482, and the water vapor is absorbed by the lithium bromide concentrated solution in the absorber 482 to obtain a lithium bromide dilute solution. The dilute lithium bromide solution enters generator 170 as described above and evaporates to obtain water vapor. Thereby completing the circulation of the refrigerant water.

In the present embodiment, the cooling water in the cooling water line 485 flows through the absorber 482 and the condenser 100 in order to absorb heat and then is discharged. The heat source water in the heat source water line 486 enters the generator 170 to release heat and is discharged. Chilled water in chilled water line 487 enters evaporator 483 to release heat and then exits.

Also in the present embodiment, the heat exchange medium in the condenser 100 is water, and the heat exchange medium is cooling water. The heat exchange medium water flows outside the heat exchange tube, the cooling water flows inside the heat exchange tube, and the heat exchange medium water and the cooling water exchange heat through the tube wall of the heat exchange tube.

Those skilled in the art will appreciate that the absorption chiller of the present application is not limited to lithium bromide chiller units, but may be used with other types of absorption chiller units.

The condenser of this application is through setting up condensation heat exchange tube bank into two at least heat exchange tube banks to set up the drain board between adjacent heat exchange tube bank. The refrigerant liquid condensed in the condenser flows longitudinally, and is discharged out of the heat exchange tube group above the liquid guide plate in time through the liquid guide plate, so that the heat exchange efficiency of the heat exchange tube group can be improved. And because the refrigerant gas in the condenser transversely flows along the horizontal direction, the non-condensable gas attached to the liquid guide plate can be timely discharged by arranging the fluid channel on the liquid guide plate, and the heat exchange efficiency of the condenser is further improved.

And, the absorption refrigerating unit of this application sets up two symmetrical condensers in the both sides of generator, compares in a single condenser, under the certain circumstances of heat transfer volume, has reduced the width of every condenser to reduced gaseous flowing distance and flow velocity, be convenient for improve heat transfer efficiency, still be favorable to reducing the adhesion possibility of noncondensable gas, thereby be favorable to discharging noncondensable gas. Meanwhile, the impact and corrosion of the gas to the heat exchange tube bundle are reduced.

In addition, the absorption refrigerating unit of the application directly communicates the generator containing cavity and the condensing containing cavity by arranging the opening on the liquid baffle, and the shutter plate group is arranged in the opening, so that the refrigerant gas generated in the generator containing cavity can enter the condensing containing cavity to be rapidly condensed almost without resistance. Therefore, the pressure in the generator cavity is kept stable, and the refrigerant in the lithium bromide solution is evaporated conveniently, so that the efficiency of the generator is improved. Meanwhile, the shutter plate group in the opening of the liquid baffle plate can also prevent lithium bromide solution carried in refrigerant gas from entering the condensation cavity, so that the phenomenon that the refrigerant is polluted by the lithium bromide solution is effectively prevented, and the refrigerating capacity of the evaporator is effectively ensured.

While the present disclosure has been described in conjunction with the examples of embodiments outlined above, various alternatives, modifications, variations, improvements, and/or substantial equivalents, whether known or that are or may be presently or later be envisioned, may be apparent to those of ordinary skill in the art. Accordingly, the examples of embodiments of the disclosure set forth above are intended to be illustrative, not limiting. Various changes may be made without departing from the spirit or scope of the disclosure. Accordingly, the present disclosure is intended to embrace all known or earlier developed alternatives, modifications, variations, improvements and/or substantial equivalents. The technical effects and problems of the present specification are illustrative and not restrictive. It should be noted that the embodiments described in the present specification may have other technical effects and may solve other technical problems.

Claims (12)

1. A condenser, characterized by comprising:

-a housing (101), the housing (101) comprising a condensation volume (231) and a refrigerant inlet (234) and a refrigerant outlet (107) communicating with the condensation volume (231), the housing (101) having a length direction (L), a width direction (W) and a height direction (H), wherein the condensation volume (231) has a first side (241) and a second side (242) opposite in the width direction (W), the refrigerant inlet (234) being located at the first side (241);

-at least two heat exchange tube groups (121), said at least two heat exchange tube groups (121) being arranged in said condensation volume (231), and each group of said heat exchange tube groups (121) comprising a number of heat exchange tubes (120), said number of heat exchange tubes (120) extending along said length direction (L); and

-at least one liquid guide plate (250), the at least one liquid guide plate (250) being arranged in the condensation volume (231) and between adjacent heat exchange tube groups (121), each liquid guide plate (250) extending along the length direction (L), wherein each liquid guide plate (250) has a first end (251) and a second end (252) in the width direction (W), the first end (251) being located at a first side (241) of the condensation volume (231) and the second end (252) defining a fluid opening (253) with an edge of the second side (242) of the condensation volume (231), and wherein the liquid guide plates (250) are configured to flow gas and liquid along the liquid guide plates (250) and to exit the liquid guide plates (250) through the fluid opening (253).

2. The condenser of claim 1, wherein:

the refrigerant outlet (107) is located at the bottom of the condensation vessel (231);

the housing (101) further comprises a non-condensable gas outlet (106) in communication with the condensation volume (231), the non-condensable gas outlet (106) being located at a first side (241) of the condensation volume (231);

wherein gas exiting the liquid guide plate (250) through the fluid opening (253) exits the condensation volume (231) through the non-condensable gas outlet (106), and liquid collects at the bottom of the condensation volume (231) and exits the condensation volume (231) through the refrigerant outlet (107).

3. The condenser of claim 2, wherein:

each liquid guide plate (250) further comprises a plurality of flow channel plates (354) arranged at intervals, a fluid channel (356) is defined between every two adjacent flow channel plates (354), the fluid channel (356) extends along the width direction (W), an inlet (361) of the fluid channel (356) is in fluid communication with the refrigerant inlet (234), and an outlet (362) of the fluid channel (356) is in fluid communication with the fluid opening (253).

4. A condenser according to claim 3, wherein:

each liquid guide plate (250) is provided with an upper surface (363) and a lower surface (364), and a plurality of flow channel plates (354) are arranged on the upper surface (363) and the lower surface (364).

5. A condenser according to claim 3, wherein:

the flow path plates (354) are arranged such that the flow areas of the fluid passages (356) in the extending direction thereof are not identical.

6. The condenser of claim 5, wherein:

each of the flow passage plates (354) is wave-shaped, the flow passage plates (354) comprise adjacent first flow passage plates (354 a) and second flow passage plates (354 b), wherein peaks of the first flow passage plates (354 a) are opposite to valleys of the second flow passage plates (354 b), and valleys of the first flow passage plates (354 a) are opposite to peaks of the second flow passage plates (354 b), so that the flow passage (356) forms wide passages (357) and narrow passages (358) having alternately changed flow areas in an extending direction thereof.

7. The condenser of claim 1, wherein:

the liquid guide plate (250) is disposed obliquely with respect to the width direction (W), and the first end (251) is higher than the second end (252) so that the liquid flows along the liquid guide plate (250) to the fluid opening (253).

8. An absorption refrigeration unit, comprising:

at least one condenser (100), the condenser (100) according to any one of claims 1-7.

9. The absorption chiller according to claim 8 further comprising:

-a generator (170), the generator (170) being arranged to generate a refrigerant gas, the generator (170) comprising and two generator outlets (271), the refrigerant gas generated by the generator (170) being evenly discharged from the two generator outlets (271);

wherein the at least one condenser (100) comprises two condensers (100), the refrigerant inlet (234) of each condenser (100) being in fluid communication with a respective one of the generator outlets (271).

10. An absorption chiller according to claim 9 wherein:

-the generator (170) defines a generator pocket (233), the generator pocket (233) having the width direction (W);

the two condensers (100) are symmetrically arranged on both sides of the generator (170) in the width direction (W).

11. An absorption chiller according to claim 10 wherein:

the housing (101) comprises two liquid baffles (273), each liquid baffle (273) extending along the length direction (L) and being connected vertically between a top wall (111) and a bottom wall (105) of the housing (101);

the two liquid baffles (273) are configured to define two condensation chambers (231) and one generator chamber (233) within the housing (101), the two condensation chambers (231) being located on both sides of the generator chamber (233) in the width direction (W);

wherein each of the liquid baffles (273) is provided with an opening (274), the opening (274) forming the refrigerant inlet (234) and the generator outlet (271).

12. An absorption chiller according to claim 11 wherein:

the housing (101) comprises two sets of louvers (275), each set of louvers (275) being disposed in the opening (274) of a respective liquid barrier (273);

wherein the louvers (275) extend obliquely upward in a direction from the generator pocket (233) to the condensing pocket (231) such that the higher end of each set of louvers (275) forms the refrigerant inlet (234) and the lower end of each set of louvers (275) forms the generator outlet (271).