Flow regulating valve and absorption refrigerating unit comprising same

Abstract

The invention discloses a flow regulating valve and an absorption refrigerating unit comprising the same. The flow regulating valve comprises a first fluid channel, a second fluid channel, a liquid level sensing device and a regulating device. The liquid level sensing device is matched with the adjusting device so that the liquid level sensing device can drive the adjusting device to move in the first direction based on the liquid level height of the first fluid, and therefore the flow of the second fluid flowing out of the second fluid channel is adjusted. The flow regulating valve comprises the fluid channel structure which is reasonably arranged, so that the liquid level height in the high-temperature generator can be sensed through the liquid level sensing device only by arranging the first fluid channel to be small in size, the size of the flow regulating valve is reduced, and the filling amount of the first fluid is reduced. According to the flow regulating valve, the liquid level sensing device and the regulating device are matched through magnetism, transmission connection is not needed, and therefore the first fluid channel and the second fluid channel can be connected in a sealed mode.

Description

Technical Field

[0001] The present application relates to an absorption heat exchange system, and in particular to a flow regulating valve and an absorption refrigeration unit comprising the same. Background Art

[0002] An absorption refrigeration unit is a heat exchange system consisting of an evaporator, absorber, condenser and generator. It uses a binary solution as the working fluid, in which the low-boiling-point component is used as the refrigerant, that is, its evaporation is used for refrigeration; the high-boiling-point component is used as the absorbent, that is, its absorption of the refrigerant vapor is used to complete the working cycle.

[0003] In some parallel absorption refrigeration units, high temperature generators and low temperature generators are arranged in parallel. The dilute solution discharged from the absorber outlet is distributed to the high temperature generator and the low temperature generator in a certain proportion to reduce heat loss and improve the working efficiency of the unit. Summary of the invention

[0004] The present application provides a flow control valve in a first aspect, comprising a first fluid channel, a second fluid channel, a liquid level sensing device and a regulating device. The first fluid channel is used to circulate a first fluid. The second fluid channel is used to circulate a second fluid. The liquid level sensing device is disposed in the first fluid channel and is configured to move in a first direction based on the liquid level height of the first fluid. The regulating device is disposed in the second fluid channel and is configured to move in the first direction to regulate the flow of the second fluid flowing out of the second fluid channel. The liquid level sensing device cooperates with the regulating device so that the liquid level sensing device drives the regulating device to move in the first direction based on the liquid level height of the first fluid, thereby regulating the flow of the second fluid flowing out of the second fluid channel.

[0005] According to the above first aspect, the liquid level sensing device and the regulating device are magnetically matched.

[0006] According to the first aspect, the first direction is an up-down direction. The liquid level sensing device includes a float assembly, the float assembly includes a float and at least one magnetic ring, the at least one magnetic ring is arranged around the float outside the float, wherein the float is arranged to float up and down as the liquid level in the first fluid channel changes, and drives the at least one magnetic ring to move up and down.

[0007] According to the first aspect, the flow regulating valve includes a fixed sleeve, the fixed sleeve defines at least a portion of the second fluid channel, and the fixed sleeve has at least one opening, and the second fluid in the second fluid channel can flow through the at least one opening. The regulating device includes a movable sleeve, the movable sleeve is movably arranged on the inner side of the fixed sleeve, and the movable sleeve is arranged to block or open at least a portion of the at least one opening as the movable sleeve moves up and down, so as to adjust the flow area of ​​the at least one opening to adjust the flow rate of the second fluid flowing out of the second fluid channel.

[0008] According to the above-mentioned first aspect, the adjusting device also includes at least one induction ring, which can sense the magnetism of the at least one magnetic ring, and the at least one induction ring is arranged around the movable sleeve and inside the movable sleeve, wherein the adjusting device is configured so that the at least one induction ring moves up and down with the up and down movement of the at least one magnetic ring, and drives the movable sleeve to move up and down, thereby adjusting the flow rate of the second fluid flowing out of the second fluid channel.

[0009] According to the first aspect, the flow control valve further comprises an upper housing, a lower housing and an inner sleeve. The upper housing and the lower housing are hollow. The inner sleeve has a flange surrounding the barrel wall of the inner sleeve. The upper housing and the lower housing are connected by the flange, an upper cavity is formed between the upper housing and the inner sleeve, and a lower cavity is formed between the lower housing and the inner sleeve. The lower cavity forms the first fluid channel, and the inner sleeve has a central channel, and the central channel and the upper cavity together form a part of the second fluid channel.

[0010] According to the first aspect, the float assembly of the liquid level sensing device is arranged around the inner sleeve at the periphery of the inner sleeve to float based on the liquid level height in the lower chamber, and the fixed sleeve is arranged on the top of the inner sleeve and connected to the upper shell, and the at least one opening is in fluid communication with the interior of the inner sleeve, wherein the movable sleeve moves up and down inside the inner sleeve and the fixed sleeve.

[0011] According to the first aspect, the flow control valve further comprises a plurality of thin rods extending in the up-down direction. At least a portion of the plurality of thin rods are arranged between the float assembly and the cylinder wall of the inner sleeve to avoid direct contact between the float assembly and the inner sleeve. And / or at least a portion of the plurality of thin rods are arranged between the movable sleeve, the inner sleeve and the fixed sleeve to avoid direct contact between the movable sleeve, the inner sleeve and the fixed sleeve.

[0012] According to the first aspect above, the flow regulating valve also includes a bottom shell, which is connected below the lower shell, wherein the interior of the bottom shell, the central channel, the interior of the fixed sleeve and the upper cavity together form the second fluid channel.

[0013] According to the first aspect, the flow control valve further comprises a first fluid inlet and a first fluid outlet and a second fluid inlet and a second fluid outlet. The first fluid inlet and the first fluid outlet are fluidically connected through the first fluid channel, wherein the first fluid inlet is arranged on the bottom shell, and the first fluid outlet is arranged on the upper shell. The second fluid inlet and the second fluid outlet are fluidically connected through the second fluid channel, wherein the second fluid outlet is arranged at the bottom of the lower shell, and the second fluid inlet is arranged at the top of the lower shell.

[0014] According to the above first aspect, the flow regulating valve further includes a liquid baffle plate, which is connected to the inner sleeve and is disposed between the first fluid inlet and the float assembly.

[0015] According to the above first aspect, the flow regulating valve also includes a pressure balance port, which is arranged at the top of the lower shell and higher than the second fluid inlet. The pressure balance port is connected to the fluid of the lower cavity and is configured to discharge the gas in the lower cavity to the outside.

[0016] According to the first aspect above, the flow regulating valve further includes a filtering device, and the filtering device is disposed in the second fluid channel.

[0017] According to the first aspect, the flow control valve further comprises an adjusting screw, through which the fixed sleeve is connected to the upper housing, wherein the adjusting screw is configured to adjust the position of the fixed sleeve relative to the inner sleeve, thereby adjusting the range of the flow area of ​​the at least one opening to be adjusted by the movable sleeve.

[0018] In a second aspect, the present application provides an absorption refrigeration unit, comprising an absorber, a high temperature generator, a low temperature generator, and a flow regulating valve according to any one of the first aspects. The absorber is configured to output a second fluid. The high temperature generator receives a portion of the second fluid from the absorber, and is configured to evaporate the second fluid in the high temperature generator into a first fluid. The low temperature generator receives another portion of the second fluid from the absorber. The liquid level in the first fluid channel of the flow regulating valve is the same as the liquid level of the first fluid in the high temperature generator. Wherein, the flow regulating valve is configured to adjust the flow of the second fluid entering the high temperature generator based on the liquid level of the first fluid in the first fluid channel, thereby adjusting the flow ratio of the second fluid output from the absorber into the high temperature generator and the low temperature generator.

[0019] Other objects and advantages of the present application will be apparent from the following description of the present application with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A is a block diagram of an absorption refrigeration unit according to an embodiment of the present application;

[0021] Figure 1B for Figure 1A A schematic diagram of the structure of the flow control valve and the high temperature generator;

[0022] Figure 2A for Figure 1A A three-dimensional structural diagram of the flow control valve at an angle;

[0023] Figure 2B for Figure 2A The flow control valve shown is a three-dimensional structural diagram at another angle;

[0024] Figure 2C for Figure 2A An exploded view of the flow control valve shown;

[0025] Figure 3 for Figure 2C A partial three-dimensional structural diagram of the flow control valve in FIG.

[0026] Figure 4 for Figure 2A An axial cross-sectional view of the flow control valve is shown. DETAILED DESCRIPTION

[0027] Various specific embodiments of the present application will be described below with reference to the accompanying drawings that form a part of this specification. It should be understood that although terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "top", "bottom", etc., are used in this application to describe various example structural parts and elements of the present application, these terms are used here only for the purpose of convenience of description and are determined based on the example orientations shown in the accompanying drawings. Since the embodiments disclosed in the present application can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

[0028] Figure 1A and Figure 1B It is used to illustrate the structure of an absorption refrigeration unit according to an embodiment of the present application, wherein Figure 1A This is the structural block diagram of the absorption refrigeration unit, which is used to illustrate the working principle of the absorption refrigeration unit. Figure 1B This is a schematic diagram of the structure of the flow control valve and high temperature generator in the absorption refrigeration unit, which is used to illustrate the working principle of the flow control valve. Figure 1A As shown, the absorption refrigeration unit 100 is a lithium bromide refrigeration unit, including an evaporator 103, an absorber 104, a condenser 102, a low-temperature generator 101, a high-temperature generator 115, a flow control valve 110, a low-temperature heat exchanger 105, a high-temperature heat exchanger 106, a first solution pump 113 and a second solution pump 114, which are connected by pipeline fluid. In the absorption refrigeration unit 100 of this embodiment, water is used as a refrigerant and lithium bromide is used as an absorbent. The concentration change of the aqueous solution of lithium bromide and the phase change of water are used to cool or heat the outside. The hollow arrows in the figure represent the flow direction of the refrigerant water, and the solid arrows represent the flow direction of the absorbent lithium bromide.

[0029] Specifically, the water vapor evaporated from the high temperature generator 115 and the low temperature generator 101 enters the condenser 102, releases heat to the cooling water in the cooling water pipeline 108 in the condenser 102 and condenses into liquid water. The liquid water is discharged from the condenser 102 and enters the evaporator 103, absorbs the heat of the chilled water in the chilled water pipeline 109 in the evaporator 103, and then evaporates into water vapor and is discharged to the absorber 104. The water vapor is absorbed by the lithium bromide concentrated solution in the absorber 104 to obtain a lithium bromide dilute solution, and releases heat to the cooling water in the cooling water pipeline 108 in the absorber 104. The lithium bromide dilute solution enters the high temperature generator 115 and the low temperature generator 101 after distribution, and evaporates in the high temperature generator 115 and the low temperature generator 101 to obtain water vapor. The water vapor evaporated in the high temperature generator 115 enters the condenser 102 after releasing heat through the low temperature generator 101, and the water vapor evaporated in the low temperature generator 101 directly enters the condenser 102, thereby completing the circulation of the refrigerant water.

[0030] The lithium bromide dilute solution from the absorber 104 first enters the low-temperature heat exchanger 105 through the first solution pump 113 to absorb heat. Then, after being distributed, a portion of the lithium bromide dilute solution enters the high-temperature generator 115 after further absorbing heat through the high-temperature heat exchanger 106, and the other portion of the lithium bromide dilute solution directly enters the low-temperature generator 101. The lithium bromide dilute solution in the high-temperature generator 115 evaporates into a lithium bromide concentrated solution, a lithium bromide dilute solution and water vapor, and the lithium bromide dilute solution from the high-temperature generator 115 enters the low-temperature generator 101, and evaporates into a lithium bromide concentrated solution and water vapor in the low-temperature generator 101 together with the other portion of the lithium bromide dilute solution from the absorber 104. The lithium bromide concentrated solution from the high-temperature generator 115 first enters the high-temperature heat exchanger 106 to release heat, then merges with the lithium bromide concentrated solution from the low-temperature generator 101, then enters the low-temperature heat exchanger 105 through the second solution pump 114 to further release heat, and finally returns to the absorber 104 to complete the circulation of the absorbent lithium bromide.

[0031] In this embodiment, the cooling water in the cooling water pipeline 108 flows through the condenser 102 and the absorber 104 in sequence to absorb heat and then be discharged. The heat source water in the heat source water pipeline 107 flows through the high temperature generator 115 to release heat and then be discharged. The chilled water in the chilled water pipeline 109 flows through the evaporator 103 to release heat and then be discharged.

[0032] Those skilled in the art will appreciate that the absorption refrigeration unit of the present application is not limited to a lithium bromide refrigeration unit, and can also be used for other types of absorption refrigeration units.

[0033] In this embodiment, the flow rate of the dilute lithium bromide solution entering the high temperature generator 115 is adjusted by the flow regulating valve 110, and the flow rate of the dilute lithium bromide solution entering the low temperature generator 101 can be adjusted accordingly.

[0034] Specifically, combined Figure 1A and Figure 1B As shown, the flow regulating valve 110 has a first fluid channel 111 and a second fluid channel 112. The first fluid channel 111 has a first fluid inlet 121 and a first fluid outlet 122. The first fluid inlet 121 is in fluid communication with the high temperature generator 115, and the first fluid outlet 122 is in fluid communication with the high temperature heat exchanger 106. The first fluid channel 111 is used to circulate the first fluid. In this embodiment, the first fluid is a lithium bromide concentrated solution. The second fluid channel 112 has a second fluid inlet 123 and a second fluid outlet 124. The second fluid inlet 123 is in fluid communication with the high temperature heat exchanger 106, and the second fluid outlet 124 is in fluid communication with the high temperature generator 115. The second fluid channel 112 is used to circulate the second fluid. In this embodiment, the second fluid is a lithium bromide dilute solution.

[0035] The flow regulating valve 110 is configured to regulate the flow of the second fluid flowing out of the second fluid channel 112 based on the liquid level of the first fluid in the first fluid channel 111. The liquid level of the first fluid in the first fluid channel 111 reflects the liquid level in the high temperature generator 115. In other words, the flow regulating valve 110 is configured to regulate the flow of the dilute lithium bromide solution entering the high temperature generator 115 based on the liquid level of the concentrated lithium bromide solution in the high temperature generator 115.

[0036] More specifically, the high temperature generator 115 has a generator liquid level 118, and the first fluid channel 111 has a first fluid channel liquid level 119. The high temperature generator 115 is in fluid communication with the first fluid inlet 121 of the first fluid channel 111. The flow control valve 110 also has a pressure balance port 125, which is used to discharge the gas in the first fluid channel 111 of the flow control valve 110. In this embodiment, the pressure balance port 125 is in fluid communication with the top of the high temperature generator 115 to discharge the gas in the first fluid channel 111 into the high temperature generator 115. As a result, the first fluid channel 111 and the high temperature generator 115 can maintain pressure balance, so that the first fluid channel liquid level 119 in the first fluid channel 111 is roughly consistent with the height of the generator liquid level 118 in the high temperature generator 115.

[0037] In the present application, the flow control valve 110 further includes a liquid level sensing device 241 disposed in the first fluid channel 111 and a regulating device 342 disposed in the second fluid channel 112 (see Figure 2C and Figure 3 The liquid level sensing device 241 is used to detect the height of the first fluid channel liquid level 119 in the first fluid channel 111. The regulating device 342 regulates the fluid flow in the second fluid channel 112 based on the height detected by the liquid level sensing device 241. This will be described in detail later in conjunction with the specific structure of the flow regulating valve 110.

[0038] With the operation of the absorption refrigeration unit 100, the height of the generator liquid level 118 in the high temperature generator 115 will change with the change of the load. When the generator liquid level 118 is too high, the surface pressure of the heat exchange tube of the heat exchange tube group of the heat source water pipeline 107 increases, which hinders the generation of water vapor and causes the heat exchange efficiency to decrease. When the generator liquid level 118 is too low, the top heat exchange tube of the heat exchange tube group of the heat source water pipeline 107 cannot exchange heat, which also causes the heat exchange efficiency to decrease. The flow control valve 110 can timely adjust the flow of the lithium bromide dilute solution entering the high temperature generator 115 based on the actual liquid level height of the lithium bromide concentrated solution in the high temperature generator 115, and ensure that the generator liquid level 118 is always slightly higher than the heat exchange tube group of the heat source water pipeline 107, so as to achieve the most ideal heat exchange efficiency.

[0039] Figure 2A-2C FIG. 1 shows a specific structure of a flow control valve 110 according to an embodiment of the present application. Figure 2A A three-dimensional structural diagram of the flow control valve 110 is shown in a top view. Figure 2B A three-dimensional structural diagram of the flow control valve 110 is shown from a bottom-up perspective. Figure 2A and Figure 2B It is used to explain the external structure of the flow control valve 110. Figure 2C An exploded view of the flow control valve is shown. Figure 2C Used to illustrate the components of a flow control valve.

[0040] like Figure 2A-2C As shown, the flow control valve 110 includes an upper shell 231, a lower shell 232 and a bottom shell 233, and the upper shell 231, the lower shell 232 and the bottom shell 233 are generally hollow. The upper shell 231 is generally a cylindrical shape with a closed top and an open bottom. The lower shell 232 is generally a cylindrical shape with an open top and an open bottom. The bottom shell 233 is generally a cylindrical shape with both the top and the bottom open.

[0041] The lower shell 232 defines a first fluid channel 111 inside. The first fluid inlet 121, the first fluid outlet 122 and the pressure balance port 125 are arranged on the lower shell 232, and are staggered in the axial and circumferential directions of the lower shell 232. In this embodiment, the pressure balance port 125 and the first fluid inlet 121 are located at the top of the lower shell 232, and the first fluid inlet 121 is located below the pressure balance port 125, and the first fluid outlet 122 is located at the bottom of the lower shell 232. The first fluid inlet 121 and the first fluid outlet 122 are staggered by approximately 90°, and the pressure balance port 125 is arranged at 180° with the first fluid inlet 121. This arrangement enables the first fluid channel 111 inside the lower shell 232 to quickly establish a liquid level height that is consistent with the liquid level height inside the high temperature generator 115.

[0042] The flow control valve 110 further includes an internal sleeve 238. The interior of the internal sleeve 238, the interior of the upper shell 231, and the interior of the bottom shell 233 together define the second fluid channel 112. The second fluid inlet 123 is arranged on the bottom shell 233, and the second fluid outlet 124 is arranged on the upper shell 231, and the second fluid inlet 123 and the second fluid outlet 124 are also staggered in the circumferential direction. In this embodiment, the second fluid inlet 123 is located at the bottom of the bottom shell 233, and the second fluid outlet 124 is located at the top of the upper shell 231. After the second fluid enters the second fluid channel 112 from the second fluid inlet 123, it flows roughly from bottom to top to the second fluid outlet 124 and then is discharged.

[0043] In this embodiment, the inner sleeve 238 has a flange 239 surrounding the inner sleeve 238. The upper shell 231 is sealed above the flange 239 by a first sealing ring 246, and the lower shell 232 is sealed by a second sealing ring 447 (see Figure 4 As shown) is sealed and connected below the flange 239. Thus, the upper housing 231 and the inner sleeve 238 are separated to form an upper chamber 461, and the lower housing 232 and the inner sleeve 238 are separated to form a lower chamber 462 (see Figure 4 The central channel 463 and the upper cavity 461 inside the inner sleeve 238 form a part of the second fluid channel 112, and the lower cavity 462 forms the first fluid channel 111.

[0044] The bottom shell 233 is sealedly connected to the bottom of the inner sleeve 238 through the third sealing ring 248. The cavity inside the bottom shell 233 is in fluid communication with the central channel 463 inside the inner sleeve 238 (see Figure 4 As shown), and forms another part of the second fluid channel 112. That is, the second fluid channel 112 is formed by the cavity inside the bottom shell 233, the central channel 463 and the upper cavity 461.

[0045] The flow control valve 110 further includes a filter device 226, which is sealed and connected to the bottom housing 233, so that the second fluid in the second fluid channel 112 can flow through the filter device 226 for filtration. In this embodiment, the filter device 226 is arranged upstream of the central channel 463 of the inner sleeve 238, and the impurities obtained by filtration are accumulated at the bottom of the bottom housing 233. The bottom of the bottom housing 233 is detachably connected to a drain cover 234. The operator removes the drain cover 234 to regularly clean the impurities.

[0046] The flow control valve 110 further includes a liquid level sensing device 241, which is movably sleeved on the outer side of the inner sleeve 238 to sense the liquid level of the fluid in the lower chamber 462 on the outer side of the inner sleeve 238, that is, to sense the liquid level of the fluid in the first fluid channel 111. In the present application, the liquid level sensing device 241 floats on the liquid surface of the fluid in the first fluid channel 111, and moves in a first direction, that is, up and down, based on the liquid level of the fluid in the first fluid channel 111. Therefore, the position of the liquid level sensing device 241 in the first direction reflects the liquid level of the fluid in the first fluid channel 111.

[0047] The flow control valve 110 further includes a fixed sleeve 236, which is connected to the top of the inner sleeve 238 and is connected to the upper housing 231. In this embodiment, the fixed sleeve 236 is not fixedly connected to the inner sleeve 238, but is supported above the flange 239 and fixedly connected to the upper housing 231 through the adjusting bolt 237. In some embodiments, the fixed sleeve 236 is movably supported above the flange 239 through the guide rib 355 and the guide groove 356 (see Figure 3 Therefore, by adjusting the bolt 237, the relative positions of the fixing sleeve 236, the inner sleeve 238 and the flange 239 in the first direction can be adjusted.

[0048] The fixed sleeve 236 defines a portion of the second fluid channel 112. The fixed sleeve 236 has at least one opening 235, and the second fluid in the second fluid channel 112 flows out from the at least one opening 235. By adjusting the size of the opening 235, the flow rate of the second fluid flowing out of the second fluid channel 112 can be adjusted. And by adjusting the relative position of the fixed sleeve 236 and the inner sleeve 238, the adjustable range of the opening 235 can be adjusted. This will be described later in conjunction with Figure 4 Detailed description. In some embodiments, at least one opening 235 is configured as a circle of openings 235 arranged around the circumference of the fixed sleeve 236. In some embodiments, each opening 235 is substantially a square opening extending along a first direction, that is, an up-down direction. In other embodiments, the opening can also be configured as other shapes such as a triangle or a trapezoid, so that the flow control valve 110 has different adjustment accuracy.

[0049] In the present application, the flow control valve 110 further includes a control device 342 (see Figure 3 As shown in FIG. 1 , the regulating device 342 is disposed in the second fluid channel 112. The regulating device 342 can cooperate with the liquid level sensing device 241 and move in a first direction, that is, up and down direction, based on the position of the liquid level sensing device 241, so as to adjust the flow rate of the second fluid in the second fluid channel 112 by blocking or opening at least a portion of the opening 235. This will be described later in conjunction with Figure 3 and Figure 4 Detailed description.

[0050] In this embodiment, the flow control valve 110 further includes a liquid baffle 245 and a plurality of thin rods 216. The liquid baffle 245 is connected to the lower portion of the flange 239 of the inner sleeve 238 and is located between the first fluid inlet 121 and the liquid level sensing device 241 to prevent the first fluid flowing from the first fluid inlet 121 into the first fluid channel 111 from impacting the liquid level sensing device 241. The plurality of thin rods 216 extend in the up-down direction and are disposed between the liquid level sensing device 241 and the wall of the inner sleeve 238 (combined with the liquid level sensing device 241). Figure 4 As shown in the figure, the liquid level sensing device 241 is prevented from directly contacting the inner sleeve 238, which would increase the friction resistance of the liquid level sensing device 241 moving up and down. That is, in this embodiment, the liquid level sensing device 241 is not directly sleeved on the outer side of the wall of the inner sleeve 238, but sleeved on the outer side of the thin rods 216. In this embodiment, several thin rods 216 are connected to the outer side of the wall of the inner sleeve 238.

[0051] Figure 3 FIG. 1 is a partial three-dimensional structural diagram of the flow control valve 110 after the upper shell 231, the lower shell 232 and the bottom shell 233 are omitted, which is used to further illustrate the specific structure of the liquid level sensing device 241 and the regulating device 342. Figure 3 As shown, the liquid level sensing device 241 includes a float assembly 343, which is used to float on the liquid surface of the first fluid channel 111 and move up and down as the liquid level changes. The adjustment device 342 includes a movable sleeve 354, which is movably disposed on the inner side of the fixed sleeve 236 and can move up and down to block or open at least a part of the opening 235.

[0052] In this embodiment, the float assembly 343 is magnetically matched with the regulating device 342, so that the movable sleeve 354 of the regulating device 342 is driven to move up and down by the up and down movement of the float assembly 343. Specifically, the float assembly 343 includes a float 351 and at least one magnetic ring 352. The float 351 is in the shape of a closed hollow cylinder, and its inner diameter roughly matches the size of the thin rod 216 on the inner sleeve 238, so that it is sleeved on the outside of the inner sleeve 238 and contacts and cooperates with the thin rod 216. At least one magnetic ring 352 surrounds the float 351 and is connected to the outside of the float 351, so that the magnetic ring 352 can move with the float 351. The float 351 is configured to float up and down with the liquid level in the first fluid channel 111, and drives the magnetic ring 352 to move up and down. Those skilled in the art can understand that the volume of the float 351 is set to match the buoyancy of the float assembly 343 with the gravity of the float assembly 343, so that the float assembly 343 can float on the liquid surface of the first fluid channel 111. In this embodiment, the at least one magnetic ring 352 includes a pair of magnetic rings 352, and the pair of magnetic rings 352 are respectively connected to the upper and lower sides of the float 351. This arrangement can make the movement of the float assembly 343 more stable.

[0053] The adjusting device 342 also includes at least one induction ring 353. The at least one induction ring 353 can sense the magnetism of the at least one magnetic ring 352, so as to move up and down with the up and down movement of the float assembly 343. In this embodiment, the induction ring 353 is arranged inside the movable sleeve 354 around the movable sleeve 354, and can drive the movable sleeve 354 to move up and down, thereby blocking or opening at least a part of the opening 235. In this embodiment, the at least one induction ring 353 includes a pair of induction rings 353, and the pair of induction rings 353 are fixedly connected inside the movable sleeve 354, for example, welded to the inside of the movable sleeve 354. And the pair of induction rings 353 are located at the corresponding positions of the pair of magnetic rings 352 to more accurately sense the magnetic force of the magnetic ring 352. The magnetic ring 352 and the induction ring 353 are made of materials with magnetic attraction, for example, the magnetic ring 352 is made of magnets, and the induction ring 353 is made of iron. In other embodiments, the magnetic ring 352 and the induction ring 353 can also be made of other materials with magnetic attraction.

[0054] In this embodiment, the outer wall of the movable sleeve 354 is also connected to a plurality of thin rods 317, which extend in the up-down direction and are arranged between the movable sleeve 354 and the inner sleeve 238 and the fixed sleeve 236 (combined with the inner sleeve 238 and the fixed sleeve 236). Figure 4 As shown), the movable sleeve 354 is prevented from directly contacting the inner sleeve 238 and the fixed sleeve 236, which increases the friction resistance of the movable sleeve 354 to move up and down.

[0055] Figure 4 FIG. 1 is an axial cross-sectional view of the flow control valve 110 at the first fluid inlet 121 and the pressure balance port 125, which is used to illustrate the internal structure of the flow control valve 110 and the flow paths of the first fluid and the second fluid. Figure 4 As shown, the flange 239 of the inner sleeve 238 is sealedly connected to the upper shell 231 through the first sealing ring 246, so that an upper cavity 461 is defined between the upper shell 231 and the inner sleeve 238. And the flange 239 of the inner sleeve 238 is sealedly connected to the lower shell 232 through the second sealing ring 447, so that a lower cavity 462 is defined between the lower shell 232 and the inner sleeve 238. The bottom of the inner sleeve 238 is sealedly connected to the bottom shell 233 through the third sealing ring 248.

[0056] The inner sleeve 238 has a central channel 463 therein, and the central channel 463 extends in the first direction. The bottom of the central channel 463 is in fluid communication with the second fluid inlet 123 through the filter device 226. The top of the central channel 463 is in fluid communication with the movable sleeve 354 and the interior of the fixed sleeve 236, and is in fluid communication with the second fluid outlet 124 through the opening 235 on the fixed sleeve 236.

[0057] Thus, the lower chamber 462 forms the first fluid channel 111. The first fluid can enter the first fluid channel 111 from the first fluid inlet 121 and flow out from the first fluid outlet 122. The first fluid gathers in the first fluid channel 111 to the same liquid level as the high temperature generator 115.

[0058] The interior of the bottom shell 233, the central channel 463, the interior of the fixed sleeve 236 and the upper chamber 461 together form the second fluid channel 112. The second fluid can enter the central channel 463 from the second fluid inlet 123 through the filter device 226 inside the bottom shell 233, and flow from bottom to top in the central channel 463. Then, after passing through the fixed sleeve 236, the second fluid flows out from the opening 235 on the fixed sleeve 236 to the upper chamber 461, and finally the second fluid outlet 124 flows out of the flow control valve 110. The opening 235 adjusts the flow area through the movable sleeve 354. Impurities in the second fluid entering the second fluid channel 112 are filtered by the filter device 226, and the magnetic ring can also adsorb impurities such as iron filings on the surface of the filter device 226 to prevent the fluid in the second fluid channel 112 from affecting the up and down movement of the movable sleeve 354.

[0059] The float assembly 343 of the liquid level sensing device 241 floats on the liquid surface of the first fluid channel 111, and moves up and down as the liquid level changes, so as to drive the sensing ring 353 of the regulating device 342 to move up and down, thereby driving the movable sleeve 354 to move up and down. As the movable sleeve 354 moves up and down, the opening 235 on the fixed sleeve 236 can be blocked or opened at least partially, so that the flow area of ​​the opening 235 can be adjusted to adjust the flow rate of the second fluid flowing out of the second fluid channel 112.

[0060] Combination Figure 1A , Figure 1B and Figure 4 For example, when the liquid level in the high temperature generator 115 reaches the maximum value, the liquid level in the first fluid channel 111 also reaches the maximum value. The float assembly 343 of the liquid level sensing device 241 is at the highest point, driving the movable sleeve 354 to reach the highest point, so that the opening 235 on the fixed sleeve 236 is completely blocked or covered. Therefore, the second fluid in the second fluid channel 112 can hardly flow out. The high temperature generator 115 basically no longer receives the dilute lithium bromide solution (i.e., the second fluid).

[0061] When the liquid level in the high temperature generator 115 reaches the minimum value, the liquid level in the first fluid channel 111 also reaches the minimum value. The float assembly 343 of the liquid level sensing device 241 is at the lowest point, driving the movable sleeve 354 to reach the lowest point, so that the opening 235 on the fixed sleeve 236 is fully opened. Therefore, the flow rate of the second fluid in the second fluid channel 112 reaches the maximum value. The high temperature generator 115 can be replenished with a dilute lithium bromide solution (i.e., the second fluid) as soon as possible.

[0062] The adjusting bolt 237 can adjust the position of the fixed sleeve 236 relative to the internal sleeve 238, thereby controlling the range of the flow area of ​​the opening 235 that can be adjusted by the movable sleeve 354. Since the buoyancy of fluids of different concentrations is different, even at the same liquid level, fluids of different concentrations will cause the position of the float assembly 343 to be different, and thus the position of the movable sleeve 354 to be different. By adjusting the relative position of the fixed sleeve 236 and the internal sleeve 238, fluids of different concentrations can be matched, so that the flow control valve 110 can be applied to more scenarios. For example, when the fixed sleeve 236 is at the uppermost end relative to the internal sleeve 238, the range in which the opening 235 can be adjusted by the movable sleeve 354 is almost 0, which can match the fluid with the highest concentration and is suitable for working conditions with large flow requirements.

[0063] In some embodiments, the bottom of the movable sleeve 354 has a crossbeam 357. When the movable sleeve 354 of the flow control valve 110 needs to be removed, the operator can use a tool to hook the crossbeam 357 from the bottom of the central channel 463 of the inner sleeve 238 to remove the movable sleeve 354 from the inner sleeve 238.

[0064] The flow regulating valve of the present application includes a reasonably set fluid channel structure, so that the first fluid channel only needs to be set to a smaller volume so that the liquid level height in the high-temperature generator can be sensed by the liquid level sensing device, thereby reducing the volume of the flow regulating valve and reducing the filling amount of the first fluid.

[0065] The liquid level sensing device and regulating device of the flow control valve of the present application are matched magnetically without the need for transmission connection, so that the first fluid channel and the second fluid channel can be sealed and connected to avoid leakage between the first fluid and the second fluid.

[0066] In some embodiments, the flow regulating valve of the present application also avoids direct surface contact between these components and the corresponding walls by arranging a thin rod for point contact with the movable float assembly and the movable sleeve, thereby reducing the friction resistance during movement and preventing the movable float assembly and the movable sleeve from being stuck, thereby causing flow regulation failure.

[0067] In some embodiments, the flow control valve of the present application can also control the adjustment range of the opening by adjusting the bolt, so that the flow control valve can be suitable for fluids of different densities and thus suitable for various flow conditions.

[0068] In some embodiments, the flow regulating valve of the present application also prevents impurities from entering the flow regulating valve and the high-temperature generator by providing a filtering device, and regularly cleans impurities by providing a drain cover.

[0069] In addition, the flow control valve of the present application can be easily disassembled and cleaned. Since the flow control valve has good sealing performance, when the unit needs a vacuum environment, the flow control valve can also be vacuumed to enable the unit to reach the required vacuum degree.

[0070] The absorption refrigeration unit including the flow regulating valve of the present application can more accurately and timely adjust the fluid flow entering the high-temperature generator and the low-temperature generator according to the working conditions, so that the unit has higher working efficiency.

[0071] Although the present disclosure has been described in conjunction with the examples of the embodiments summarized above, it is likely to be apparent to those of ordinary skill in the art that various alternatives, modifications, variations, improvements and / or substantially equivalent solutions, whether known or currently or soon to be foreseen, are obvious. Therefore, the examples of the embodiments of the present disclosure as stated above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to include all known or earlier developed alternatives, modifications, variations, improvements and / or substantially equivalent solutions. The technical effects and technical problems in this specification are exemplary rather than restrictive. It should be noted that the embodiments described in this specification may have other technical effects and may solve other technical problems.

Claims

1. A flow control valve, characterized in that include: A first fluid channel (111), wherein the first fluid channel (111) is used for circulating a first fluid; A second fluid channel (112), wherein the second fluid channel (112) is used for circulating a second fluid; a liquid level sensing device (241), the liquid level sensing device (241) being disposed in the first fluid channel (111) and being configured to move in a first direction based on a liquid level height of the first fluid; and an adjusting device (342), the adjusting device (342) being disposed in the second fluid channel (112) and being configured to move along the first direction to adjust the flow rate of the second fluid flowing out of the second fluid channel (112); The liquid level sensing device (241) cooperates with the regulating device (342) so that the liquid level sensing device (241) drives the regulating device (342) to move along the first direction based on the liquid level height of the first fluid, thereby regulating the flow rate of the second fluid flowing out of the second fluid channel (112).

2. The flow control valve according to claim 1, characterized in that: The liquid level sensing device (241) and the regulating device (342) are magnetically matched.

3. The flow control valve according to claim 2, characterized in that: The first direction is the up-down direction; The liquid level sensing device (241) includes a float assembly (343), wherein the float assembly (343) includes a float (351) and at least one magnetic ring (352), wherein the at least one magnetic ring (352) is arranged around the float (351) and outside the float (351), wherein the float (351) is arranged to float up and down as the liquid level in the first fluid channel (111) changes, and drives the at least one magnetic ring (352) to move up and down.

4. The flow control valve according to claim 3, characterized in that: The flow regulating valve (110) comprises a fixed sleeve (236), the fixed sleeve (236) defines at least a portion of the second fluid channel (112), and the fixed sleeve (236) has at least one opening (235), and the second fluid in the second fluid channel (112) can flow through the at least one opening (235); The regulating device (342) comprises a movable sleeve (354), and the movable sleeve (354) is movably arranged up and down on the inner side of the fixed sleeve (236). The movable sleeve (354) is configured to block or open at least a part of the at least one opening (235) as the movable sleeve (354) moves up and down, thereby adjusting the flow area of ​​the at least one opening (235) to adjust the flow rate of the second fluid flowing out of the second fluid channel (112).

5. The flow control valve according to claim 4, characterized in that: The regulating device (342) further comprises at least one induction ring (353), wherein the at least one induction ring (353) is capable of sensing the magnetism of the at least one magnetic ring (352), and the at least one induction ring (353) is arranged around the movable sleeve (354) and inside the movable sleeve (354), wherein the regulating device (342) is arranged such that the at least one induction ring (353) moves up and down along with the up and down movement of the at least one magnetic ring (352), and drives the movable sleeve (354) to move up and down, thereby regulating the flow rate of the second fluid flowing out of the second fluid channel (112).

6. The flow control valve according to claim 5, characterized in that: The flow control valve (110) further comprises: Upper housing (231); a lower shell (232), wherein the upper shell (231) and the lower shell (232) are hollow; and An inner sleeve (238), the inner sleeve (238) having a flange (239) surrounding a wall of the inner sleeve (238); The upper shell (231) and the lower shell (232) are connected via the flange (239), an upper cavity (461) is formed between the upper shell (231) and the inner sleeve (238), and a lower cavity (462) is formed between the lower shell (232) and the inner sleeve (238); And wherein, the lower cavity (462) forms the first fluid channel (111), and the inner sleeve (238) has a central channel (463), and the central channel (463) and the upper cavity (461) together form a part of the second fluid channel (112).

7. The flow control valve according to claim 6, characterized in that: The float assembly (343) of the liquid level sensing device (241) is disposed around the inner sleeve (238) at the periphery of the inner sleeve (238) so as to float based on the height of the liquid level in the lower chamber (462); The fixed sleeve (236) is arranged on the top of the internal sleeve (238) and connected to the upper shell (231), and the at least one opening (235) is connected to the internal fluid of the internal sleeve (238), wherein the movable sleeve (354) moves up and down inside the internal sleeve (238) and the fixed sleeve (236).

8. The flow control valve according to claim 7, characterized in that: The flow control valve (110) further comprises a plurality of thin rods (216, 317), wherein the thin rods (216, 317) extend in the up-down direction; wherein at least a portion of the plurality of thin rods (216, 317) are disposed between the buoy assembly (343) and the wall of the inner sleeve (238) to avoid direct contact between the buoy assembly (343) and the inner sleeve (238); and / or At least a portion of the plurality of thin rods (216, 317) are disposed between the movable sleeve (354) and the inner sleeve (238) and the fixed sleeve (236) to avoid direct contact between the movable sleeve (354) and the inner sleeve (238) and the fixed sleeve (236).

9. The flow control valve according to claim 6, characterized in that: The flow regulating valve (110) further includes a bottom shell (233), wherein the bottom shell (233) is connected below the lower shell (232), wherein the interior of the bottom shell (233), the central channel (463), the interior of the fixed sleeve (236) and the upper chamber (461) together form the second fluid channel (112).

10. The flow control valve according to claim 9, characterized in that: The flow control valve (110) further comprises: a first fluid inlet (121) and a first fluid outlet (122), wherein the first fluid inlet (121) and the first fluid outlet (122) are fluidically connected via the first fluid channel (111), wherein the first fluid inlet (121) is disposed on the bottom shell (233), and the first fluid outlet (122) is disposed on the upper shell (231); and A second fluid inlet (123) and a second fluid outlet (124), wherein the second fluid inlet (123) and the second fluid outlet (124) are fluidically connected via the second fluid channel (112), wherein the second fluid outlet (124) is disposed at the bottom of the lower shell (232), and the second fluid inlet (123) is disposed at the top of the lower shell (232).

11. The flow control valve according to claim 10, characterized in that: The flow regulating valve (110) further includes a liquid baffle (245), which is connected to the inner sleeve (238) and is disposed between the first fluid inlet (121) and the float assembly (343).

12. The flow control valve according to claim 10, characterized in that: The flow regulating valve (110) further comprises a pressure balancing port (125), wherein the pressure balancing port (125) is arranged at the top of the lower shell (232) and is higher than the second fluid inlet (123), and the pressure balancing port (125) is in fluid communication with the lower chamber (462) and is arranged to discharge the gas in the lower chamber (462) to the outside.

13. The flow control valve according to claim 1, characterized in that: The flow regulating valve (110) further comprises a filtering device (226), wherein the filtering device (226) is arranged in the second fluid channel (112).

14. The flow control valve according to claim 4, characterized in that: The flow control valve (110) further comprises an adjusting screw (237), and the fixed sleeve (236) is connected to the upper housing (231) via the adjusting screw (237); The adjusting screw (237) is configured to adjust the position of the fixed sleeve (236) relative to the inner sleeve (238), thereby adjusting the range of the flow area of ​​the at least one opening (235) adjusted by the movable sleeve (354).

15. An absorption refrigeration unit, characterized in that include: an absorber (104), the absorber (104) being configured to output a second fluid; a high temperature generator (115), the high temperature generator (115) receiving a portion of the second fluid from the absorber (104) and configured to evaporate the second fluid in the high temperature generator (115) into the first fluid; a low temperature generator (101), the low temperature generator (101) receiving another portion of the second fluid from the absorber (104); and According to any one of claims 1 to 14, the liquid level in the first fluid channel (111) of the flow regulating valve (110) is the same as the liquid level of the first fluid in the high temperature generator (115); The flow regulating valve (110) is configured to regulate the flow of the second fluid entering the high-temperature generator (115) based on the liquid level of the first fluid in the first fluid channel (111), thereby regulating the flow ratio of the second fluid output from the absorber (104) entering the high-temperature generator (115) and the low-temperature generator (101).

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