Evaporative condenser

Abstract

The utility model relates to the technical field of refrigeration, in particular to an evaporative condenser. The evaporative condenser comprises a shell and a heat exchange tube. The heat exchange pipe is installed in the shell and used for allowing a heat exchange agent to flow, the spraying piece is installed in the shell and located above the heat exchange pipe, spraying holes are formed in the side, facing the heat exchange pipe, of the spraying piece, the foam metal layer is filled with foam metal filler, and the foam metal layer is installed in the shell; the shell is provided with an air inlet and an air outlet, and the heat exchange pipe, the spraying piece and the foam metal layer are all located between the air inlet and the air outlet. The heat exchanger has the advantages that the spraying piece can spray water used for cooling the heat exchange pipe towards the heat exchange pipe, the spraying piece is located above the heat exchange pipe, the spraying action can be naturally formed by means of gravity, structures such as a booster water pump do not need to be arranged, and due to the fact that holes are formed in the foam metal layer, the heat and humidity exchange efficiency of water and air can be improved; therefore, the performance of the evaporative condenser is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to an evaporative condenser. Background Art

[0002] The evaporative condenser is an important component of the refrigeration system, and usually includes a spray part and a heat exchange tube. The spray part sprays water toward the heat exchange tube to perform heat exchange on the heat exchange tube. In order to improve the cooling effect of water on the heat exchange tube, dry cold air needs to exchange heat with the water sprayed by the spray part to reduce the temperature of the water.

[0003] Therefore, in order to increase the heat and moisture exchange area between air and water, the existing evaporative condenser is provided with a packing layer, which generally includes three types of fillers: inorganic fillers, organic fillers and metal fillers. However, the improvement of the heat and moisture exchange effect between air and water by these three fillers is still limited. Utility Model Content

[0004] Based on this, the utility model provides an evaporative condenser to solve the above technical problems.

[0005] An evaporative condenser comprises: a shell; a heat exchange tube installed in the shell and used for a heat exchange medium to flow; a spray piece installed in the shell and located above the heat exchange tube, the spray piece having a spray hole on a side facing the heat exchange tube; a foam metal layer filled with foam metal filler, the foam metal filler having a porosity of 40%-90% and a pore size of 0.1mm-20mm, the foam metal layer being installed in the shell; wherein the shell is provided with an air inlet and an air outlet, the heat exchange tube, the spray piece and the foam metal layer are all located between the air inlet and the air outlet.

[0006] In this way, the air inlet on the shell is used for the entry of dry cold air, and the air outlet is used for the outflow of humid hot air (formed after the dry cold air and water exchange heat and moisture), forming an air flow path. Since the spraying part is provided with a spraying hole, and the spraying hole is provided on the side facing the heat exchange tube, the spraying part can spray water for cooling the heat exchange tube, and since the spraying part is located above the heat exchange tube, the spraying action can be formed naturally by gravity, and there is no need to set up a booster pump or other structures. The foam metal layer has pores inside, and the porosity is 40%-90%, and the pore size is 0.1mm-20mm, so it can improve the heat and moisture exchange efficiency between water and air, so as to improve the performance of the evaporative condenser. It also has the hygroscopicity of a metal filler, and takes into account the advantages of high thermal conductivity, high strength, corrosion resistance, and antibacterial properties of metal.

[0007] In one embodiment, the foam metal layer is located between the air inlet and the heat exchange tube, and is arranged close to the heat exchange tube.

[0008] In one embodiment, the foam metal layer includes a first layer and a second layer, the first layer is located on a side of the second layer close to the heat exchange tube, the first layer includes at least foam copper filler, and the second layer includes at least organic filler.

[0009] In one embodiment, the foam metal layer is located between the heat exchange tube and the spray element.

[0010] In one embodiment, the foam metal layer includes a first layer and a second layer, the first layer is arranged closer to the spray part than the second layer, and the first layer includes at least one of foam nickel filler, foam aluminum filler or foam alloy filler, and the second layer includes foam copper filler or inorganic composite filler.

[0011] In one embodiment, the foam metal layer is located between the heat exchange tube and the air inlet, and is arranged directly opposite to the air inlet.

[0012] In one embodiment, the foam metal layer includes at least one of foam stainless steel filler, foam copper filler or foam alloy filler.

[0013] In one embodiment, the foam metal layer is located on the circumferential outer side of the heat exchange tube and is spaced apart from the heat exchange tube and connected to the inner wall of the shell, and the foam metal layer includes one of foam aluminum filler, foam aluminum-germanium alloy filler, foam copper filler or foam alloy filler.

[0014] In one embodiment, the foam metal layer is located between the air inlet and the heat exchange tube; or, the foam metal layer is located between the heat exchange tube and the air outlet;

[0015] The foam metal layer is configured as an arch structure, and the angle between the vertex of the inner arch of the foam metal layer and the connecting line of the two ends of the heat exchange tube and the radial horizontal line of the shell is α, satisfying 5°≤α≤10°.

[0016] In one embodiment, the evaporative condenser includes a water tank, a circulating water pump, and a water make-up pump. The water tank is arranged at the bottom of the shell, one end of the circulating water pump is connected to the water tank, and the other end is connected to the spray element, and one end of the water make-up pump is connected to the water tank.

[0017] Compared with the prior art, the utility model provides a foam metal layer in the evaporative condenser, utilizing its advantages of hygroscopicity, high metal thermal conductivity, high strength, corrosion resistance, antibacterial properties, etc., to improve the heat and moisture exchange efficiency between water and air, thereby improving the performance of the evaporative condenser. In addition, a variety of foam metal layer position setting schemes are provided, and the type of filler in the foam metal layer is changed according to different positions, so that the foam metal layer can adapt to various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of an evaporative condenser according to the first embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of an evaporative condenser according to the second embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the structure of an evaporative condenser according to Embodiment 3 of the present invention;

[0021] Figure 4 A schematic structural diagram of an evaporative condenser according to a fourth embodiment of the present invention;

[0022] Figure 5 A cross-sectional view of a foam metal layer of one embodiment of an evaporative condenser provided by the utility model;

[0023] Figure 6 This is a schematic structural diagram of a foam metal layer of one embodiment of the evaporative condenser provided by the utility model.

[0024] The symbols in the figure mean the following:

[0025] 100. Evaporative condenser; 10. Shell; 11. Air inlet; 12. Air outlet; 20. Heat exchange tube; 30. Spray part; 40. Foam metal layer; 41. First layer; 42. Second layer; 43. Inner arch; 50. Water tank; 60. Circulating water pump; 70. Make-up water pump; 71. Anti-fouling isolation valve; 72. Shock absorber throat; 73. Valve; 80. Fan. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it may be directly on the other mechanism or there may be a central mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a central mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0031] The utility model provides an evaporative condenser 100, which is applied to refrigeration systems such as air conditioning units. A foam metal layer 40 is provided in the evaporative condenser 100, which can increase the heat and moisture exchange area between water and air to improve the heat and moisture exchange efficiency, thereby improving the performance of the evaporative condenser 100.

[0032] The evaporative condenser 100 includes a shell 10, a heat exchange tube 20, a spray piece 30 and a foam metal layer 40. The heat exchange tube 20 is installed in the shell 10 for supplying heat exchange medium. The spray piece 30 is installed in the shell 10 and is located above the heat exchange tube 20. The spray piece 30 is provided with a spray hole (not shown in the figure) on the side facing the heat exchange tube 20. The foam metal layer 40 is filled with foam metal filler. The porosity of the foam metal filler is set to 40%-90%, and the pore size is 0.1mm-20mm. The foam metal layer 40 is installed in the shell 10; wherein, the shell 10 is provided with an air inlet 11 and an air outlet 12, and the heat exchange tube 20, the spray piece 30 and the foam metal layer 40 are all located between the air inlet 11 and the air outlet 12.

[0033] In this way, the air inlet 11 provided on the shell 10 is used for the entry of dry cold air, and the air outlet 12 is used for the outflow of humid hot air (formed after the dry cold air and water exchange heat and moisture), forming an air flow path. Since the spraying hole is provided on the spraying part 30, and the spraying hole is provided on the side facing the heat exchange tube 20, the spraying part 30 can spray water for cooling the heat exchange tube 20, and since the spraying part 30 is located above the heat exchange tube 20, the spraying action can be formed naturally by gravity, and there is no need to set up a booster water pump or other structures. Since the foam metal layer 40 has pores inside, it can improve the heat and moisture exchange efficiency between water and air, so as to improve the performance of the evaporative condenser 100. Moreover, the foam metal filler has a porosity of 40%-90% and a pore size of 0.1mm-20mm, so it has the hygroscopicity of a metal filler, and takes into account the advantages of high thermal conductivity, high strength, corrosion resistance, antibacterial property, etc. of metal. Preferably, the porosity of the foam metal layer 40 is above 90%, the spray element 30 is arranged to extend laterally, and the spray holes opened thereon are also evenly spaced along the length direction of the spray element 30. The water sprayed from the multiple spray holes can achieve uniform heat exchange with the heat exchange tube 20, thereby improving the heat exchange efficiency and the uniformity of the heat exchange.

[0034] The position of the foam metal layer 40 can be set in a variety of ways, and when the position of the foam metal layer 40 changes, the requirements it bears also change accordingly, so the type of the foam metal filler therein should also be adaptively changed, which are described in detail one by one here:

[0035] Embodiment 1

[0036] See also Figure 1The foam metal layer 40 is located between the air inlet 11 and the heat exchange tube 20, and is arranged close to the heat exchange tube 20. In this way, the water sprayed by the spray part 30 first passes through the heat exchange tube 20 and exchanges heat with the heat exchange tube 20, so the temperature of the high-temperature heat exchange agent flowing in the heat exchange tube 20 decreases, while the temperature of the water increases. After the heat exchange is completed at the heat exchange tube 20, the water continues to drip down and exchanges heat and moisture with the dry cold air entering from the lower air inlet 11, and the dry cold air becomes humid hot air and flows out from the upper air outlet 12, and the temperature of the high-temperature water can be dissipated.

[0037] Furthermore, a water tank 50 is provided at the bottom of the housing 10, and the water tank 50 and the spraying element 30 are connected through a circulating water pump 60. Since the water tank 50 is provided at the bottom of the housing 10, the water sprayed from the spraying element 30 will eventually drip into the water tank 50, and the circulating water pump 60 transports the water in the water tank 50 to the spraying element 30 again, and sprays again to enter the next cycle. Since the sprayed water needs to be low temperature, the heat exchange between the dry cold air and the water can reduce the temperature of the water dripping into the water tank 50, so that the temperature of the water entering the circulation is always at a low value.

[0038] Specifically, the foam metal layer 40 includes a first layer 41 and a second layer 42. The first layer 41 is located on the side of the second layer 42 close to the heat exchange tube 20. The first layer 41 includes at least a foam copper filler, and the second layer 42 includes at least an organic filler. In this way, since the first layer 41 is close to the heat exchange tube 20, the water temperature here is the highest, resulting in an accelerated deposition rate. Therefore, the first layer 41 is preferably a foam metal filler that is easy to scale, and in this embodiment, a foam copper filler is used. Since the second layer 42 is farther away from the heat exchange tube 20 than the first layer 41, an organic filler with a higher cooling efficiency and hygroscopicity is selected.

[0039] Embodiment 2

[0040] See also Figure 2 The foam metal layer 40 is located between the spray part 30 and the air outlet 12, and a fan 80 is provided at the air outlet 12. The fan 80 at the air outlet 12 is used to accelerate the air flow and drive the air circulation in the evaporative condenser 100. Since the foam metal layer 40 is located above the heat exchange tube 20, the dry cold air exchanges heat with the heat exchange tube 20 first, and then exchanges heat and moisture with the water sprayed from the spray part 30 in the foam metal layer 40.

[0041] Further, the foam metal layer 40 includes a first layer 41 and a second layer 42, the first layer 41 is arranged closer to the spray part 30 than the second layer 42, and the first layer 41 includes at least one of foam nickel filler, foam aluminum filler or foam alloy filler, and the second layer 42 is close to the heat exchange tube 20, and the second layer 42 includes foam copper filler or inorganic composite filler. In this way, since the first layer 41 is close to the fan 80, the noise here is relatively large, so the first layer 41 uses foam nickel filler, foam aluminum filler or foam alloy filler with good attraction and noise reduction effect, and the second layer 42 is close to the heat exchange tube 20, similar to the first embodiment, the air temperature and humidity here are the highest, and the deposition attachment rate is accelerated, so the first layer 41 is preferably a foam metal filler that is easy to scale, and in this embodiment, a foam copper filler or an inorganic composite filler is used.

[0042] See also Figure 5-Figure 6 In the above-mentioned embodiment 1 and embodiment 2, when the foam metal layer 40 is located between the air inlet 11 and the heat exchange tube 20 or the foam metal layer 40 is located between the heat exchange tube 20 and the air outlet 12, the foam metal layer 40 is preferably set to an arch structure, and the angle between the vertex of the inner arch 43 of the foam metal layer 40 and the connecting line of the two ends of the foam metal layer 40 and the radial horizontal line of the shell 10 is α, which satisfies 5°≤α≤10°. In this way, the deformation of the filler caused by the impact force of water and the gravity of the foam metal filler itself during long-term operation can be better dealt with, thereby extending the service life of the foam metal layer 40. And the angle range of α is reasonably set, which not only avoids the limited effect of extending the service life of the structure due to insufficient arch angle, but also prevents the arch from being too high to affect the normal heat and moisture exchange effect of water and air in the foam metal layer 40.

[0043] Exemplarily, the angle α is 5°, 6°, 7°, 8°, 9° and 10°, but is not limited to the two endpoint values ​​mentioned above.

[0044] Embodiment 3

[0045] See also Figure 3 In this embodiment, the foam metal layer 40 is located between the heat exchange tube 20 and the air inlet 11, and is arranged directly opposite to the air inlet 11. In this way, the temperature of the air at the air inlet 11 is relatively low, and the efficiency of heat and moisture exchange between water and air at this place is correspondingly high.

[0046] In this embodiment, the foam metal layer 40 includes at least one of a foam stainless steel filler, a foam copper filler or a foam alloy filler. The foam stainless steel filler has the effects of corrosion resistance and low pressure drop, and has a long service life, and can cope with the pressure drop generated here. The foam copper can reduce the ion concentration of the circulating water and play a role in slowing down the scale, and the foam alloy has a large porosity and strong hygroscopicity.

[0047] Embodiment 4

[0048] Please refer to Figure 4 , the foam metal layer 40 is located on the circumferential outer side of the heat exchange tube 20 and is arranged at intervals with the heat exchange tube 20, and is connected to the inner wall of the housing 10. The foam metal layer 40 includes one of foam aluminum filler, foam aluminum germanium alloy filler, foam copper filler or foam alloy filler. Since the temperature of the heat exchange tube 20 is relatively high, the foam metal layer 40 is arranged here. The environment here is high temperature and easy to scale. Considering the cooling efficiency and hygroscopicity, it is preferably to use foam aluminum filler or foam aluminum germanium alloy filler with high porosity.

[0049] Of course, for the consideration of scale inhibition, foam copper filler or foam alloy filler can also be used.

[0050] In the present application, the material in the foam metal layer 40 is not limited to a single material, and can also be formed by combining multiple materials in proportion. For example, it is formed by combining foam copper filler and foam aluminum filler, so as to have both cooling efficiency and hygroscopicity, and can also play the role of scale inhibition.

[0051] In addition, in both the above-mentioned Embodiment 1 and Embodiment 4, a water tank 50, a circulating water pump 60 and a makeup water pump 70 are preferably provided. The water tank 50 is arranged at the bottom of the housing 10. One end of the circulating water pump 60 is communicated with the water tank 50, and the other end is communicated with the spraying member 30. One end of the makeup water pump 70 is communicated with the water tank 50. The technical effects of the water tank 50 and the circulating water pump 60 have been elaborated in detail in Embodiment 1 and will not be repeated here. Since in the heat and moisture exchange between water and air, water will evaporate out of the evaporative condenser 100 along with the air, the makeup water pump 70 can supplement the water volume into the housing 10.

[0052] Furthermore, the evaporative condenser 100 further includes an anti-pollution isolation valve 71, a shock-absorbing throat 72 and a valve 73. The anti-pollution isolation valve 71, the shock-absorbing throat 72 and the valve 73 are communicated with the makeup water pump 70 in sequence. The anti-pollution isolation valve 71 can ensure the cleanliness of the water entering the housing 10. The shock-absorbing throat 72 is used for shock absorption and noise reduction. The valve 73 is used to control the on-off of the makeup water pump 70.

[0053] In the present application, the heat exchange tube 20 adopts a coil type. In other embodiments, the heat exchange tube 20 can also adopt a plate type, a riser type, a bullet type, a twisted tube type, an elliptical tube type, a grooved tube type, etc.

[0054] Compared with the prior art, the present utility model improves the heat and moisture exchange efficiency of water and air by arranging the foam metal layer 40 in the evaporative condenser 100, and utilizes its advantages such as hygroscopicity, high metal thermal conductivity, high strength, corrosion resistance, antibacterial property, etc., so as to improve the performance of the evaporative condenser 100. Moreover, multiple position setting schemes of the foam metal layer 40 are provided, and the filler types in the foam metal layer 40 are changed according to different positions, so that the foam metal layer 40 can adapt to various working conditions.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An evaporative condenser, characterized in that: include: Housing (10); A heat exchange tube (20) is installed in the shell (10) and is used for allowing a heat exchange medium to flow; A spraying member (30) is installed in the shell (10) and is located above the heat exchange tube (20); a spraying hole is provided on a side of the spraying member (30) facing the heat exchange tube (20); A foam metal layer (40) filled with a foam metal filler, wherein the porosity of the foam metal filler is set to be 40%-90% and the pore size is set to be 0.1 mm-20 mm, and the foam metal layer (40) is installed in the housing (10); The shell (10) is provided with an air inlet (11) and an air outlet (12), and the heat exchange tube (20), the spray element (30) and the foam metal layer (40) are all located between the air inlet (11) and the air outlet (12).

2. The evaporative condenser according to claim 1, characterized in that: The foam metal layer (40) is located between the air inlet (11) and the heat exchange tube (20), and is arranged close to the heat exchange tube (20).

3. The evaporative condenser according to claim 2, characterized in that: The foam metal layer (40) comprises a first layer (41) and a second layer (42), the first layer (41) being located on a side of the second layer (42) close to the heat exchange tube (20), the first layer (41) comprising at least foam copper filler, and the second layer (42) comprising at least organic filler.

4. The evaporative condenser according to claim 1, characterized in that: The foam metal layer (40) is located between the heat exchange tube (20) and the spray element (30).

5. The evaporative condenser according to claim 4, characterized in that: The foam metal layer (40) comprises a first layer (41) and a second layer (42), the first layer (41) being arranged closer to the spray element (30) than the second layer (42), and the first layer (41) comprises at least one of foam nickel filler, foam aluminum filler or foam alloy filler, and the second layer (42) comprises foam copper filler or inorganic composite filler.

6. The evaporative condenser according to claim 1, characterized in that: The foam metal layer (40) is located between the heat exchange tube (20) and the air inlet (11), and is arranged directly opposite to the air inlet (11).

7. The evaporative condenser according to claim 6, characterized in that: The foam metal layer (40) comprises at least one of foam stainless steel filler, foam copper filler or foam alloy filler.

8. The evaporative condenser according to claim 1, characterized in that: The foam metal layer (40) is located on the circumferential outer side of the heat exchange tube (20) and is spaced apart from the heat exchange tube (20), and is connected to the inner wall of the shell (10), and the foam metal layer (40) includes one of foam aluminum filler, foam aluminum-germanium alloy filler, foam copper filler or foam alloy filler.

9. The evaporative condenser according to claim 1, characterized in that: The foam metal layer (40) is located between the air inlet (11) and the heat exchange tube (20); or, the foam metal layer (40) is located between the heat exchange tube (20) and the air outlet (12); The foam metal layer (40) is configured as an arch structure, and the angle between the vertex of the inner arch (43) of the foam metal layer (40), the connecting line of the two ends of the foam metal layer (40), and the radial horizontal line of the shell (10) is α, satisfying 5°≤α≤10°.

10. The evaporative condenser according to claim 1, characterized in that: The evaporative condenser comprises a water tank (50), a circulating water pump (60), and a water replenishment pump (70); the water tank (50) is arranged at the bottom of the shell (10); one end of the circulating water pump (60) is connected to the water tank (50), and the other end is connected to the spray element (30); one end of the water replenishment pump (70) is connected to the water tank (50).

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