Absorption refrigeration system

Abstract

This application discloses an absorption refrigeration system, comprising a first generator, a condenser, an evaporator, an absorber, a first detection device, a second detection device, and a control device. The first generator produces refrigerant gas. The condenser is in fluid communication with the first generator and is configured to condense the refrigerant gas from the first generator into a refrigerant liquid. The evaporator is in fluid communication with the condenser and is configured to evaporate the refrigerant liquid from the condenser into refrigerant gas. The absorber is in fluid communication with the evaporator and is configured to condense the refrigerant gas from the evaporator into a refrigerant liquid. The first detection device is configured to detect the composition of the liquid in the evaporator. The second detection device is configured to detect the composition of the liquid leaving the condenser and entering the evaporator. The control device is communicatively connected to the first and second detection devices and is configured to send different signals based on the data detected by the first and second detection devices.

Description

Technical Field

[0001] This application relates to the field of absorption refrigeration systems. Background Technology

[0002] An absorption refrigeration system consists of a generator, condenser, evaporator, and absorber. The absorbent mainly flows in the generator and absorber, while the refrigerant mainly flows in the condenser and evaporator. However, sometimes the absorbent may enter the condenser and evaporator, which can reduce the operating efficiency of the absorption refrigeration system. Summary of the Invention

[0003] Exemplary embodiments of this application can solve at least some of the above-mentioned problems.

[0004] This application provides an absorption refrigeration system, comprising a first generator, a condenser, an evaporator, an absorber, a first detection device, a second detection device, and a control device. The first generator is configured to generate refrigerant gas. The condenser is in fluid communication with the first generator and is configured to condense the refrigerant gas from the first generator into a refrigerant liquid. The evaporator is in fluid communication with the condenser and is configured to evaporate the refrigerant liquid from the condenser into refrigerant gas. The absorber is in fluid communication with the evaporator and is configured to condense the refrigerant gas from the evaporator into a refrigerant liquid. The first detection device is configured to detect the composition of the liquid in the evaporator. The second detection device is configured to detect the composition of the liquid leaving the condenser and entering the evaporator. The control device is communicatively connected to the first and second detection devices and is configured to send different signals based on the data detected by the first and second detection devices.

[0005] According to the above-described absorption refrigeration system, the control device is configured to determine whether the composition of the liquid in the evaporator is abnormal based on data detected by the first detection device. The control device is also configured to determine whether the composition of the liquid leaving the condenser and entering the evaporator is abnormal based on data detected by the second detection device.

[0006] According to the above-described absorption refrigeration system, the first detection device is configured to detect the pH value of the liquid in the evaporator. The second detection device is configured to detect the pH value of the liquid leaving the condenser and entering the evaporator.

[0007] According to the above absorption refrigeration system, the control device is configured such that when the absorption refrigeration system is in a shutdown state, if the control device determines that the composition of the liquid in the evaporator is abnormal based on the data detected by the first detection device, the control device issues a first signal, the first signal indicating that the absorbent source is the absorber.

[0008] According to the above-described absorption refrigeration system, the control device is configured such that: when the absorption refrigeration system is in operation, if the control device determines, based on data detected by the first and second detection devices, that the composition of the liquid in the evaporator is abnormal while the composition of the liquid in the condenser is not abnormal, the control device issues a first signal, indicating that the absorbent source is the absorber. The control device is also configured such that: when the absorption refrigeration system is in operation, if the control device determines, based on data detected by the first and second detection devices, that the composition of the liquid in the evaporator is not abnormal while the composition of the liquid in the condenser is abnormal, the control device issues a second signal, indicating that the absorbent source is the first generator.

[0009] According to the above-described absorption refrigeration system, the absorption refrigeration system further includes a third detection device. The third detection device is configured to detect the liquid level in the absorber and send a liquid level signal to the control device. The control device is communicatively connected to the third detection device and is configured to send different signals based on the data detected by the first and second detection devices and the liquid level detected by the third detection device.

[0010] According to the above-described absorption refrigeration system, the evaporator is provided with an overflow port, and the evaporator is in fluid communication with the absorber through the overflow port. The overflow port is configured such that when the liquid level in one of the evaporator and the absorber is higher than the overflow port, the liquid in one of the evaporator and the absorber can enter the other of the evaporator and the absorber through the overflow port. The third detection device is configured to detect whether the liquid level in the absorber has reached the height of the overflow port.

[0011] According to the above absorption refrigeration system, the control device is configured such that when the absorption refrigeration system is in operation, if the control device determines, based on the data detected by the first detection device and the second detection device and the liquid level signal issued by the third detection device, that the composition of the liquid in the evaporator is abnormal, the composition of the liquid in the condenser is not abnormal, and the liquid level in the absorber is higher than a predetermined liquid level, the control device issues a third signal, the third signal indicating that the absorbent source is the overflow port.

[0012] According to the above absorption refrigeration system, the control device is configured such that when the absorption refrigeration system is in operation, if the control device determines, based on the data detected by the first detection device and the second detection device and the signal emitted by the third detection device, that the composition of the liquid in the evaporator is abnormal, the composition of the liquid in the condenser is not abnormal, the liquid level in the absorber is lower than a predetermined liquid level, and the absorbent content in the evaporator has increased, the control device emits a fourth signal, the fourth signal indicating that the absorbent source is the partition plate set between the evaporator and the absorber.

[0013] According to the above absorption refrigeration system, the control device is configured such that when the absorption refrigeration system is in operation, if the control device determines, based on the data detected by the first detection device and the second detection device and the signal emitted by the third detection device, that the composition of the liquid in the evaporator is abnormal, the composition of the liquid in the condenser is not abnormal, the liquid level in the absorber is lower than a predetermined liquid level, and the absorbent content in the evaporator has not increased, the control device emits a fifth signal, the fifth signal indicating that the absorbent source is a baffle installed between the evaporator and the absorber.

[0014] According to the above-described absorption refrigeration system, the absorption refrigeration system further includes a second generator and a fourth detection device. The second generator is configured to generate refrigerant gas, thereby providing heat to the first generator. The fourth detection device is configured to detect the composition of the liquid after the refrigerant gas generated from the second generator enters and exits the first generator.

[0015] According to the above-described absorption refrigeration system, the control device is communicatively connected to the fourth detection device and is configured to send different signals based on the data detected by the first detection device, the second detection device, the third detection device, and the fourth detection device.

[0016] According to the above absorption refrigeration system, the fourth detection device is configured to detect the pH value of the liquid leaving the first generator and entering the condenser.

[0017] According to the above absorption refrigeration system, the control device is configured such that when the absorption refrigeration system is in operation, if the control device determines, based on signals from the first detection device, the second detection device, and the fourth detection device, that the composition of the liquid in the evaporator is not abnormal, the composition of the liquid in the condenser is not abnormal, and the composition of the liquid leaving the first generator and entering the condenser is abnormal, the control device issues a sixth signal, the sixth signal indicating that the absorbent source is the second generator.

[0018] According to the above absorption refrigeration system, the absorption refrigeration system also includes a drain pipe, which can controllably connect the absorber and the evaporator in fluid, so that the liquid in the evaporator flows into the absorber.

[0019] According to the above-described absorption refrigeration system, the absorption refrigeration system further includes a valve, which is disposed on the drain pipe and communicatively connected to the control device. The control device is configured to control the opening and closing of the valve according to different signals emitted by the control device, thereby connecting and disconnecting the drain pipe.

[0020] The absorption refrigeration system of this application can determine the source of the absorbent in the evaporator by at least whether the composition state of the liquid in the evaporator 108 and the absorber 110 is abnormal, and indicate the source of the absorbent through different signals. Attached Figure Description

[0021] The features and advantages of this application can be better understood by reading the following detailed description with reference to the accompanying drawings, in which the same reference numerals denote the same parts, wherein:

[0022] Figure 1 This is a system schematic diagram of the first embodiment of the absorption refrigeration system of this application;

[0023] Figure 2 yes Figure 1 The diagram shown is a control system diagram of an absorption refrigeration system.

[0024] Figure 3 Is it like this? Figure 2 A schematic internal structure diagram of the control device shown;

[0025] Figures 4A-4B Is it like this? Figure 1 The control flow diagram of the absorption refrigeration system is shown below;

[0026] Figure 5 It is a control flowchart of the absorption refrigeration system after the processor sends the first, second, third, fourth or fifth signal;

[0027] Figure 6 This is a system schematic diagram of a second embodiment of the absorption refrigeration system of this application;

[0028] Figure 7 yes Figure 6 The control flowchart of the second embodiment of the absorption refrigeration system is shown. Detailed Implementation

[0029] Various specific embodiments of the invention will now be described with reference to the accompanying drawings, which form part of this specification. It should be understood that although terms indicating direction, such as "front," "rear," "up," "down," "left," "right," etc., are used in this invention to describe various exemplary structural parts and elements of the invention in a directional or orientational manner, these terms are used only for ease of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are illustrative only and should not be considered as limiting. In the following drawings, the same reference numerals are used for the same parts.

[0030] Figure 1 This is a system schematic diagram of the first embodiment of the absorption refrigeration system of this application. Figure 1As shown, the absorption refrigeration system includes a first generator 102, a condenser 106, an evaporator 108, and an absorber 110. The first generator 102 includes a first generator outlet 1021 and a first generator inlet 1023. The condenser 106 includes a condenser inlet 1061 and a condenser outlet 1062. The evaporator 108 includes an evaporator first inlet 1081, an evaporator second inlet 1082, and an evaporator outlet 1083. The absorber 110 includes an absorber outlet 1102 and a drain outlet 1103. The first generator 102 is equipped with a heat source (not shown) and is configured to heat the refrigerant and absorbent, thereby turning the refrigerant into a refrigerant gas. The first generator outlet 1021 is connected to the condenser inlet 1061 via a first pipe 131, thereby enabling fluid communication between the first generator 102 and the condenser 106, allowing the refrigerant gas to enter the condenser 106. In the condenser 106, the refrigerant gas is condensed into refrigerant liquid. The condenser outlet 1062 is connected to the evaporator first inlet 1081 via a second pipe 132, thereby enabling fluid communication between the condenser 106 and the evaporator 108, allowing refrigerant liquid to enter the evaporator 108. In the evaporator 108, the refrigerant liquid exchanges heat with the user-side fluid (e.g., chilled water from an air conditioner), thus evaporating into refrigerant gas. The evaporator second inlet 1082 and the evaporator outlet 1083 are connected via a circulation pipe 133, and a circulation pump 134 is installed on the circulation pipe 133, allowing the refrigerant liquid in the evaporator 108 to continuously flow out of the evaporator outlet 1083, enter the circulation pipe 133, and then enter the evaporator 108 again from the evaporator second inlet 1082. A communication port 141 is provided between the evaporator 108 and the absorber 110, enabling fluid communication between them. Several baffles 142 are provided at the communication port 141. Several baffles 142 are spaced apart from each other, allowing refrigerant gas in the evaporator 108 to enter the absorber 110 through the gaps between the baffles 142. In the absorber 110, the refrigerant gas condenses into refrigerant liquid. Furthermore, the evaporator 108 is provided with an overflow port 143. The evaporator 108 is in fluid communication with the absorber 110 through the overflow port 143. The overflow port 143 is configured such that when the liquid level in the evaporator 108 is higher than the overflow port 143, the liquid in the evaporator 108 can enter the absorber 110 through the overflow port 143. The absorber outlet 1102 is connected to the first generator inlet 1023 via a third pipe 135, thereby allowing fluid communication between the absorber 110 and the first generator 102, enabling refrigerant liquid to enter the first generator 102. An auxiliary pump 136 is provided on the third pipe 135. The auxiliary pump 136 is configured to pressurize the liquid in the third conduit 135, thereby allowing the refrigerant liquid in the absorber 110 to enter the first generator 102.

[0031] It should be noted that in this application, the evaporator 108 and the absorber 110 are housed in a single housing, with a partition plate 140 separating the evaporator 108 and the absorber 110. Both the connecting port 141 and the overflow port 143 are located on the partition plate 140.

[0032] like Figure 1 As shown, the absorption refrigeration system also includes a drain pipe 151. The drain pipe 151 controllably connects the absorber 110 and the evaporator 108 in fluid communication, allowing liquid in the evaporator 108 to flow into the absorber 110. Specifically, the drain port 1103 is connected to the circulation pipe 133 via the drain pipe 151, allowing liquid in the evaporator 108 to flow into the absorber 110. A valve 152 is provided on the drain pipe 151. The valve 152 can be opened and closed, thereby enabling the drain pipe 151 to controllably connect the absorber 110 and the evaporator 108 in fluid communication.

[0033] like Figure 1 As shown, the absorption refrigeration system further includes a first detection device 121, a second detection device 122, and a third detection device 123. The first detection device 121 is configured to detect the composition of the liquid in the evaporator 108. In this embodiment, the first detection device 121 is disposed in the evaporator 108. It is understood that in other embodiments, the first detection device 121 may be disposed in other locations. The second detection device 122 is configured to detect the composition of the liquid leaving the condenser 106 and entering the evaporator 108. In this embodiment, the second detection device 122 is disposed on the second pipe 132. It is understood that in other embodiments, the second detection device 122 may be disposed in other locations. The third detection device 123 is configured to detect the liquid level in the absorber 110. In this application, the third detection device 123 is disposed in the absorber 110 and configured to detect whether the liquid level in the absorber 110 has reached a predetermined liquid level (i.e., the height of the overflow port 143). It is understood that in other embodiments, the third detection device 123 may be disposed in other locations.

[0034] Figure 2 yes Figure 1 The diagram shows the control system of an absorption refrigeration system. Figure 2As shown, the refrigeration system also includes a control device 202. The control device 202 is configured to communicate with the first detection device 121, the second detection device 122, and the third detection device 123, thereby acquiring data detected by the first and second detection devices 121 and the liquid level signal sent by the third detection device 123. The control device 202 is configured to send different signals based on the data detected by the first and second detection devices 121. More specifically, the control device 202 is configured to determine whether the composition of the liquid in the evaporator 108 is abnormal based on the data detected by the first detection device 121. The control device 202 is configured to determine whether the composition of the liquid leaving the condenser 106 and entering the evaporator 108 is abnormal based on the data detected by the second detection device 122. Furthermore, the control device 202 is also configured to send different signals based on the data detected by the first and second detection devices 121 and the liquid level detected by the third detection device 123. The control device 202 is communicatively connected to the valve 152, thereby controlling the opening and closing of the valve 152.

[0035] like Figure 2 As shown, the refrigeration system also includes a signal output device 204. The control device 202 is configured to communicate with the signal output device 204, thereby causing the signal output device 204 to emit different signals. In embodiments of this application, the signal output device 204 can emit light of different colors to represent different signals. In other embodiments, the signal output device 204 may have other representation methods, including images, sounds, etc.

[0036] In this application, both the first detection device 121 and the second detection device 122 are configured to detect the compositional state of the liquid. The compositional state refers to the properties of the liquid, such as specific volume, density, pH value, pOH value, and conductivity. Specifically, because different substances (e.g., refrigerant and absorbent) have different properties (e.g., different specific volumes, densities, pH values, pOH values, and conductivity), the properties of a mixture of refrigerant and absorbent will fall between those of a pure refrigerant and a pure absorbent. Therefore, by detecting the compositional state of the liquid, the control device 202 can determine whether the liquid contains absorbent. In embodiments of this application, both the first detection device 121 and the second detection device 122 are configured to detect the pH value of the liquid. As an example, the refrigerant in the absorption refrigeration system is water, and the absorbent is lithium bromide. As an example, when the detection devices (e.g., the first detection device 121 and the second detection device 122) detect that the pH value of the liquid satisfies: 7.0 ≤ pH ≤ 7.25, the control device 202 determines that the compositional state of the liquid is not abnormal. When the detection device (e.g., the first detection device 121 and the second detection device 122) detects that the pH value of the liquid meets the condition of pH value ≥ 7.5, the control device 202 determines that the composition state of the liquid is abnormal. As another example, when the detection device (e.g., the first detection device 121 and the second detection device 122) detects the pH value of the liquid, and the control device 202 determines that the pH value of the liquid increases by ≥ 0.05 per minute, the control device 202 determines that the composition state of the liquid is abnormal.

[0037] The control device 202 is configured to: when the absorption refrigeration system is in a shutdown state, if the control device 202 determines that the composition of the liquid in the evaporator 108 is abnormal based on the data detected by the first detection device 121, the control device 202 sends a first signal, the first signal indicating that the absorbent source is the absorber 110.

[0038] The control device 202 is configured to: when the absorption refrigeration system is in operation, if the control device 202 determines that the composition of the liquid in the evaporator 108 is abnormal and the composition of the liquid in the condenser 106 is not abnormal based on the data detected by the first detection device 121 and the second detection device 122, the control device 202 issues a first signal, the first signal indicating that the absorbent source is the absorber 110.

[0039] The control device 202 is configured to: when the absorption refrigeration system is in operation, if the control device 202 determines that the composition of the liquid in the evaporator 108 is abnormal and the composition of the liquid in the condenser 106 is not abnormal based on the data detected by the first detection device 121 and the second detection device 122, the control device 202 sends a second signal, the second signal indicating that the absorbent source is the first generator 102.

[0040] The control device 202 is configured to: when the absorption refrigeration system is in operation, if the control device 202 determines that the composition of the liquid in the evaporator 108 is abnormal, the composition of the liquid in the absorber 110 is not abnormal, and the liquid level in the absorber 110 reaches a predetermined level based on the data detected by the first detection device 121 and the second detection device 122 and the liquid level signal issued by the third detection device 123, the control device 202 issues a third signal, the third signal indicating that the absorbent source is the overflow port 143.

[0041] The control device 202 is configured to, when the absorption refrigeration system is in operation, if the control device 202 determines, based on the data detected by the first detection device 121 and the second detection device 122 and the liquid level signal issued by the third detection device 123, that the composition of the liquid in the evaporator 108 is abnormal, the composition of the liquid in the absorber 110 is not abnormal, the liquid level in the absorber 110 has not reached the predetermined liquid level, and the absorbent content in the evaporator 108 has increased (e.g., the pH value has increased), the control device 202 issues a fourth signal, indicating that the source of the absorbent is a leak in the partition plate (e.g., there are holes or gaps in the partition plate 140).

[0042] The control device 202 is configured to, when the absorption refrigeration system is in operation, if the control device 202 determines, based on the data detected by the first detection device 121 and the second detection device 122 and the liquid level signal issued by the third detection device 123, that the liquid state in the evaporator 108 is abnormal, the liquid state in the absorber 110 is not abnormal, the liquid level in the absorber 110 has not reached the predetermined liquid level, and the absorbent content in the evaporator 108 has not increased (e.g., the pH value has not increased), the control device 202 issues a fifth signal, indicating that the absorbent source is baffle splash (e.g., liquid in the absorber splashes onto the baffle 142 and enters the evaporator 108).

[0043] Figure 3 Is it like this? Figure 2 A schematic internal structure diagram of the control device 202 shown. Figure 3As shown, the control device 202 includes a bus 341, a processor 342, an input device 343, an output device 344, and a memory 345 containing a control program 346. Each component of the control device 202, including the processor 342, input device 343, output device 344, and memory 345, is communicatively connected to the bus 341, enabling the processor 342 to control the operation of the input device 343, output device 344, and memory 345. Specifically, the memory 345 stores programs, instructions, and data, while the processor 342 reads programs, instructions, and data from the memory 345 and writes data to the memory 345. By executing the programs and instructions read from the memory 345, the processor 342 controls the operation of the input device 343 and the output device 344. The input device 343 receives signals and data via connections 351, 352, and 353, including data detected by the first detection device 121 and the second detection device 122, and a liquid level signal sent by the third detection device 123. Output device 344 sends a control signal to valve 152 via connection 361, thereby controlling the opening and closing of valve 152. Output device 344 also sends a control signal to signal output device 204 via connection 362, thereby controlling the output of signal output device 204 (e.g., different colors of light).

[0044] In the embodiments of this application, the implementation is as follows: Figures 4A-5 The program of the flowchart shown is stored in the memory 345 of the control device 202.

[0045] Figures 4A-4B Is it like this? Figure 1 The control flow diagram of the absorption refrigeration system is shown below. Figures 4A-4B As shown, in step 401, the processor 342 obtains the composition state of the liquid in the current evaporator 108 and condenser 106 through the first detection device 121 and the second detection device 122, respectively. Then, the processor 342 proceeds to step 402.

[0046] In step 402, processor 342 determines whether the absorption refrigeration system is in a shutdown state. If the absorption refrigeration system is in a shutdown state, processor 342 proceeds to step 406.

[0047] In step 406, processor 342 determines whether the composition of the liquid in evaporator 108 is abnormal. If the composition of the liquid in evaporator 108 is not abnormal, processor 342 proceeds to step 420. In step 420, the control flow ends. If the composition of the liquid in evaporator 108 is abnormal, processor 342 proceeds to step 408.

[0048] In step 408, processor 342 sends a first signal indicating that the source of the absorbent is absorber 110. Then, processor 342 proceeds to step 421.

[0049] In step 402, if the absorption refrigeration system is not in a shutdown state (i.e., the absorption refrigeration system is in an operating state), the processor 342 will proceed to step 404.

[0050] In step 404, processor 342 determines whether the composition of the liquid in evaporator 108 is abnormal. If the composition of the liquid in evaporator 108 is abnormal, processor 342 proceeds to step 412.

[0051] In step 412, processor 342 determines whether the composition of the liquid in condenser 106 is abnormal. If the composition of the liquid in condenser 106 is abnormal, processor 342 proceeds to step 420. In step 420, the control flow ends. If the composition of the liquid in condenser 106 is not abnormal, processor 342 issues a first signal indicating that the absorbent source is absorber 110. Subsequently, processor 342 proceeds to step 421.

[0052] In step 404, if the composition of the liquid in the evaporator 108 is not abnormal, the processor 342 will proceed to step 414.

[0053] In step 414, processor 342 determines whether the composition of the liquid in condenser 106 is abnormal. If the composition of the liquid in condenser 106 is not abnormal, processor 342 proceeds to step 420. In step 420, the control flow ends. If the composition of the liquid in condenser 106 is abnormal, processor 342 proceeds to step 416.

[0054] In step 416, processor 342 sends a second signal indicating that the absorbent source is the first generator 102. Subsequently, processor 342 proceeds to step 420. In step 420, the control flow ends.

[0055] In step 421, processor 342 obtains the liquid level in absorber 110 via third detection device 123. Then, processor 342 proceeds to step 423.

[0056] In step 423, the processor 342 determines whether the liquid level in the absorber 110 has reached a predetermined level. If the liquid level in the absorber 110 has reached the predetermined level, the processor 342 proceeds to step 425.

[0057] In step 425, processor 342 sends a third signal indicating that the absorbent source is overflow port 143. Then, processor 342 proceeds to step 420. In step 420, the control flow ends.

[0058] In step 423, if the liquid level in absorber 110 does not reach the predetermined liquid level, processor 342 will proceed to step 427.

[0059] In step 427, processor 342 shuts down the absorption refrigeration system. Then, processor 342 proceeds to step 429.

[0060] In step 429, processor 342 obtains the composition state of the liquid in the current evaporator 108 through the first detection device 121. Subsequently, processor 342 proceeds to step 431.

[0061] In step 431, processor 342 determines whether the absorbent content in evaporator 108 has increased compared to before. If the absorbent content in evaporator 108 has increased compared to before, processor 342 proceeds to step 433.

[0062] In step 433, processor 342 issues a fourth signal indicating that the absorbent source is a leak in the separator plate (e.g., there are holes or gaps in the separator plate 140). Processor 342 then proceeds to step 420. In step 420, the control flow ends.

[0063] In step 431, if the absorbent content in evaporator 108 has not increased compared to before, processor 342 will proceed to step 435.

[0064] In step 435, processor 342 issues a fifth signal indicating that the absorbent source is baffle splash (e.g., liquid in the absorber splashes onto baffle 142 and enters evaporator 108). Processor 342 then proceeds to step 420. In step 420, the control flow ends.

[0065] Therefore, the source of the absorbent in the evaporator 108 can be determined at least by whether the composition of the liquid in the evaporator 108 and the absorber 110 is abnormal, and the source of the absorbent can be indicated by different signals.

[0066] Figure 5 This is a control flowchart showing the operation of the absorption refrigeration system after the processor 342 issues the first, second, third, fourth, or fifth signal. (Example) Figure 5As shown, in step 501, the processor 342 determines whether the absorption refrigeration system is in operation. If the absorption refrigeration system is not in operation (i.e., the absorption refrigeration system is in shutdown state), the processor 342 returns to step 501. If the absorption refrigeration system is in operation, the processor 342 returns to step 503.

[0067] In step 503, processor 342 opens valve 152, allowing liquid in evaporator 108 to flow into absorber 110 through drain pipe 151. Then, processor 342 proceeds to step 505.

[0068] In step 505, the processor 342 determines whether the opening time of the valve 152 has reached a preset time (e.g., 1 minute). If the opening time of the valve 152 has not reached the preset time, the processor 342 returns to step 505 until the opening time of the valve 152 reaches the preset time, at which point the processor 342 proceeds to step 507.

[0069] In step 507, processor 342 closes valve 152. Then, processor 342 proceeds to step 509.

[0070] In step 509, processor 342 obtains the composition state of the liquid in the current evaporator 108 through the first detection device 121. Subsequently, processor 342 proceeds to step 511.

[0071] In step 511, processor 342 determines whether the composition of the liquid in evaporator 108 is abnormal. If the composition of the liquid in evaporator 108 is not abnormal, processor 342 proceeds to step 501. If the composition of the liquid in evaporator 108 is abnormal, processor 342 proceeds to step 503.

[0072] Therefore, when an absorption refrigeration system needs to be operated in a scenario where there is already absorbent in the evaporator 108, the liquid in the evaporator 108 is allowed to flow into the absorber 110 through the drain pipe 151 by opening the valve 152, so that the absorbent in the evaporator 108 can flow into the absorber 110 through the drain pipe 151, thereby preventing the absorbent from corroding the inner wall of the evaporator 108 or the heat exchange tubes in the evaporator 108.

[0073] Figure 6 This is a schematic diagram of a second embodiment of the absorption refrigeration system of this application. Figure 6 The second embodiment of the absorption refrigeration system shown is similar to Figure 1 The similarities to the first embodiment of the absorption refrigeration system shown will not be repeated here. Figure 6 The second embodiment of the absorption refrigeration system shown is similar to Figure 1The main difference in the first embodiment of the absorption refrigeration system shown is that: Figure 6 The second embodiment of the absorption refrigeration system shown also includes a second generator 602 and a fourth detection device 622.

[0074] like Figure 6 As shown, the second generator 602 is configured to generate refrigerant gas, thereby providing heat to the first generator 102. Specifically, the second generator 602 includes a heat source (not shown) and is configured to heat the refrigerant and absorbent, thus turning the refrigerant into refrigerant gas. The outlet 6021 of the second generator is connected to the first generator 102 via a pipe 611, so that the refrigerant gas generated by the second generator 602 serves as the heat source for the first generator 102. The refrigerant gas cools down after exchanging heat with the liquid in the first generator 102 and flows out of the first generator 102 via a pipe 612. The pipe 612 is connected to the condenser inlet 1061, allowing the refrigerant gas to enter the condenser 106. The absorber outlet 1102 is connected to the first generator inlet 1023 via a third pipe 135, allowing the refrigerant liquid in the absorber 110 to enter the first generator 102. It is also connected to the second generator 602 via a pipe 613, allowing the refrigerant liquid in the absorber 110 to enter the second generator 602. The first generator outlet 1021 of the first generator 102 is connected to the absorber 110 via a pipe 614, allowing the absorbent in the first generator 102 to enter the absorber 110.

[0075] like Figure 6 As shown, the fourth detection device 622 is configured to detect the composition of the liquid after the refrigerant gas generated by the second generator 602 enters and exits the first generator 102. In the embodiments of this application, the fourth detection device 622 is disposed on the pipe 612. It is understood that in other embodiments, the fourth detection device 622 may also be disposed in other locations.

[0076] The control device 202 is configured to: when the absorption refrigeration system is in operation, if the control device 202 determines, based on the data detected by the first detection device 121, the second detection device 122 and the fourth detection device 622, that the composition of the liquid in the evaporator 108 is not abnormal, the composition of the liquid in the condenser 106 is not abnormal, and the composition of the liquid after the refrigerant gas generated by the second generator 602 enters the first generator 102 and leaves the first generator 102 is abnormal, the control device 202 issues a sixth signal, the sixth signal indicating that the absorbent source is the second generator 602.

[0077] In this application, the fourth detection device 622 is configured to detect the compositional state of the liquid. Compositional state refers to the properties of the liquid, such as specific volume, density, pH value, pOH value, and conductivity. Specifically, because different substances (e.g., refrigerant and absorbent) have different properties (e.g., different specific volumes, densities, pH values, pOH values, and conductivity), the properties of a mixture of refrigerant and absorbent will fall between those of pure refrigerant and pure absorbent. Therefore, by detecting the compositional state of the liquid, the control device 202 can determine whether the liquid contains absorbent. In an embodiment of this application, the fourth detection device 622 is configured to detect the pH value of the liquid. As an example, the refrigerant in the absorption refrigeration system is water, and the absorbent is lithium bromide. When the fourth detection device 622 detects that the pH value of the liquid meets the following condition: 7.0 ≤ pH value ≤ 7.25, the control device 202 determines that the compositional state of the liquid is normal. When the fourth detection device 622 detects that the pH value of the liquid meets the following condition: pH value ≥ 7.5, the control device 202 determines that the compositional state of the liquid is abnormal. As another example, when the fourth detection device 622 detects the pH value of the liquid, and the control device 202 determines that the pH value of the liquid increases by ≥0.05 per minute, the control device 202 determines that the composition state of the liquid is abnormal.

[0078] Figure 7 yes Figure 6 The control flowchart of the second embodiment of the absorption refrigeration system is shown. Figure 7 The control flow diagram shown is Figures 4A-4B The similarities between the control flow diagrams shown will not be repeated here. Figure 7 The control flow diagram shown is Figures 4A-4B The main difference in the control flowchart shown is that in step 414, if the composition of the liquid in the condenser 106 is not abnormal, the processor 342 will transfer the operation to step 701.

[0079] In step 701, processor 342 determines whether the liquid composition is abnormal after the refrigerant gas generated by the second generator 602 enters and leaves the first generator 102. If the liquid composition is normal, processor 342 proceeds to step 420. In step 420, the control flow ends. If the liquid composition is abnormal, processor 342 proceeds to step 703.

[0080] In step 703, processor 342 issues a sixth signal, indicating that the absorbent source is the second generator 602. Subsequently, processor 342 proceeds to step 420. In step 420, the control flow ends.

[0081] Therefore, when the absorption refrigeration system includes the second generator 602, the processor 342 can determine whether the source of the absorbent in the condenser 106 is the second generator 602.

[0082] Although this disclosure has been described in conjunction with examples of the embodiments outlined above, various alternatives, modifications, variations, improvements, and / or substantially equivalents, whether known or currently or soon to be foreseen, will likely be apparent to those skilled in the art. Furthermore, the technical effects and / or technical problems described herein are exemplary and not limiting; therefore, the disclosures herein may be used to solve other technical problems and have other technical effects and / or can solve other technical problems. Accordingly, the examples of embodiments of this disclosure as set forth above are intended to be illustrative and not limiting. Various changes may be made without departing from the spirit or scope of this disclosure. Therefore, this disclosure is intended to include all known or previously developed alternatives, modifications, variations, improvements, and / or substantially equivalents.

Claims

1. An absorption refrigeration system, characterized in that: The absorption refrigeration system includes: A first generator (102) is configured to generate refrigerant gas; A condenser (106) is in fluid communication with the first generator (102) and is configured to condense refrigerant gas from the first generator (102) into refrigerant liquid. An evaporator (108) is in fluid communication with the condenser (106), and the evaporator (108) is configured to evaporate liquid refrigerant from the condenser (106) into gas refrigerant. An absorber (110) is in fluid communication with the evaporator (108) and is configured to condense refrigerant gas from the evaporator (108) into refrigerant liquid. A first detection device (121) is configured to detect the composition state of the liquid in the evaporator (108) and determine whether the composition state of the liquid in the evaporator (108) is abnormal based on the data detected by the first detection device (121). A second detection device (122) is configured to detect the composition of the liquid leaving the condenser (106) and entering the evaporator (108), and to determine whether the composition of the liquid leaving the condenser (106) and entering the evaporator (108) is abnormal based on the data detected by the second detection device (122); and A control device (202) is communicatively connected to the first detection device (121) and the second detection device (122) and is configured to send different signals to indicate the source of the absorbent based on the data detected by the first detection device (121) and the second detection device (122).

2. The absorption refrigeration system as described in claim 1, characterized in that: The first detection device (121) is configured to detect the pH value of the liquid in the evaporator (108); The second detection device (122) is configured to detect the pH value of the liquid leaving the condenser (106) and entering the evaporator (108).

3. The absorption refrigeration system as described in claim 1, characterized in that: The control device (202) is configured to: when the absorption refrigeration system is in a shutdown state, if the control device (202) determines that the composition of the liquid in the evaporator (108) is abnormal based on the data detected by the first detection device (121), the control device (202) issues a first signal, the first signal indicating that the absorbent source is the absorber (110).

4. The absorption refrigeration system as described in claim 1, characterized in that: The control device (202) is configured to: when the absorption refrigeration system is in operation, if the control device (202) determines, based on the data detected by the first detection device (121) and the second detection device (122), that the composition of the liquid in the evaporator (108) is abnormal and the composition of the liquid in the condenser (106) is not abnormal, the control device (202) issues a first signal, the first signal indicating that the absorbent source is the absorber (110); The control device (202) is configured to: when the absorption refrigeration system is in operation, if the control device (202) determines, based on the data detected by the first detection device (121) and the second detection device (122), that the composition of the liquid in the evaporator (108) is not abnormal and the composition of the liquid in the condenser (106) is abnormal, the control device (202) issues a second signal, the second signal indicating that the absorbent source is the first generator (102).

5. The absorption refrigeration system as described in claim 1, characterized in that, Also includes: A third detection device (123) is configured to detect the liquid level of the absorber (110) and send a liquid level signal to the control device (202); The control device (202) is communicatively connected to the third detection device (123) and is configured to send different signals based on the data detected by the first detection device (121) and the second detection device (122) and the liquid level detected by the third detection device (123).

6. The absorption refrigeration system as described in claim 5, characterized in that: The evaporator (108) is provided with an overflow port (143), and the evaporator (108) is in fluid communication with the absorber (110) through the overflow port (143); The overflow port (143) is configured such that when the liquid level of one of the evaporator (108) and the absorber (110) is higher than the overflow port (143), the liquid of one of the evaporator (108) and the absorber (110) can enter the other of the evaporator (108) and the absorber (110) through the overflow port (143); The third detection device (123) is configured to detect whether the liquid level in the absorber (110) has reached the height of the overflow port (143).

7. The absorption refrigeration system as described in claim 6, characterized in that: The control device (202) is configured such that when the absorption refrigeration system is in operation, if the control device (202) determines, based on the data detected by the first detection device (121) and the second detection device (122) and the liquid level signal issued by the third detection device (123), that the composition of the liquid in the evaporator (108) is abnormal, the composition of the liquid in the condenser (106) is not abnormal, and the liquid level in the absorber (110) is higher than a predetermined liquid level, the control device (202) issues a third signal, the third signal indicating that the absorbent source is the overflow port (143).

8. The absorption refrigeration system as described in claim 5, characterized in that: The control device (202) is configured such that when the absorption refrigeration system is in operation, if the control device (202) determines, based on the data detected by the first detection device (121) and the second detection device (122) and the signal emitted by the third detection device (123), that the composition of the liquid in the evaporator (108) is abnormal, the composition of the liquid in the condenser (106) is not abnormal, the liquid level in the absorber (110) is lower than a predetermined liquid level, and the absorbent content in the evaporator (108) is increased, the control device (202) emits a fourth signal, the fourth signal indicating that the absorbent source is the partition plate (140) provided between the evaporator (108) and the absorber (110).

9. The absorption refrigeration system as described in claim 5, characterized in that: The control device (202) is configured such that when the absorption refrigeration system is in operation, if the control device (202) determines, based on the data detected by the first detection device (121) and the second detection device (122) and the signal emitted by the third detection device (123), that the composition of the liquid in the evaporator (108) is abnormal, the composition of the liquid in the condenser (106) is not abnormal, the liquid level in the absorber (110) is lower than a predetermined liquid level, and the absorbent content in the evaporator (108) has not increased, the control device (202) emits a fifth signal, the fifth signal indicating that the absorbent source is the baffle (142) provided between the evaporator (108) and the absorber (110).

10. The absorption refrigeration system as described in claim 5, characterized in that, Also includes: A second generator (602) is configured to generate refrigerant gas, thereby providing heat to the first generator (102); as well as A fourth detection device (622) is configured to detect the composition of a liquid after the refrigerant gas generated from the second generator (602) enters the first generator (102) and leaves the first generator (102).

11. The absorption refrigeration system as described in claim 10, characterized in that: The control device (202) is communicatively connected to the fourth detection device (622) and is configured to send different signals based on the data detected by the first detection device (121), the second detection device (122), the third detection device (123), and the fourth detection device (622).

12. The absorption refrigeration system as described in claim 10, characterized in that: The fourth detection device (622) is configured to detect the pH value of the liquid leaving the first generator (102) and entering the condenser (106).

13. The absorption refrigeration system as described in claim 10, characterized in that: The control device (202) is configured such that when the absorption refrigeration system is in operation, if the control device (202) determines, based on signals from the first detection device (121), the second detection device (122), and the fourth detection device (622), that the composition of the liquid in the evaporator (108) is not abnormal, the composition of the liquid in the condenser (106) is not abnormal, and the composition of the liquid leaving the first generator (102) and entering the condenser (106) is abnormal, the control device (202) issues a sixth signal, the sixth signal indicating that the absorbent source is the second generator (602).

14. The absorption refrigeration system as described in claim 1 or 10, characterized in that, Also includes: A drain pipe (151) is provided that can controllably connect the absorber (110) and the evaporator (108) in fluid communication, thereby allowing liquid in the evaporator (108) to flow into the absorber (110).

15. The absorption refrigeration system as described in claim 14, characterized in that, Also includes: A valve (152) is disposed on the drain pipe (151) and is communicatively connected to the control device (202); The control device (202) is configured to control the opening and closing of the valve (152) according to different signals emitted by the control device (202), thereby connecting and disconnecting the drain pipe (151).

Images