Air conditioning system, heat recovery temperature regulation method and research vessel

Abstract

The application relates to the technical field of shipborne equipment, and discloses an air conditioning system, a heat recovery temperature regulation method and an investigation ship, which comprises an air conditioning module, the air conditioning module comprises a first air conditioner and a second air conditioner, a first air outlet at an output end of the first air conditioner is arranged in different laboratories, a second air outlet at an output end of the second air conditioner is arranged in multiple intervals of a clean room, a cooling module is connected with the first air conditioner and the second air conditioner respectively, a heat recovery module comprises a cooling water assembly, a heat recovery device and a heat accumulator, the cooling water assembly and the heat accumulator are connected with the air conditioning module, the heat recovery device is connected with the cooling water assembly and the heat accumulator at two ends respectively, and the heat recovery device is in heat exchange connection with the cooling module; the first air conditioner and the second air conditioner are arranged respectively, so that the air cleanliness in the clean room can be improved, and the scientific research efficiency is improved; the heat recovery module can absorb and store the heat of the cooling module, and the energy consumption of the laboratory air conditioning system is reduced.

Description

Technical Field

[0001] This invention relates to the field of shipborne equipment technology, and in particular to an air conditioning system, a heat recovery temperature control method, and a research vessel. Background Technology

[0002] With the continuous improvement of scientific research vessel construction standards, the trend of diversified development of ship laboratories is becoming increasingly apparent. As an important place for various experiments and research on board, the internal environment of the laboratory directly affects the accuracy of experimental results and the health of experimental personnel. In order to better serve scientists in conducting scientific experiments and research, and to facilitate scientists in conducting real-time data analysis of collected samples, higher requirements are needed for the control systems of factors affecting the laboratory environment, such as temperature, humidity, airflow, cleanliness, and energy conservation.

[0003] Currently, shipboard laboratory air conditioning systems suffer from numerous problems due to a lack of specialized research on complex experimental environments across multiple disciplines. On the one hand, they cannot meet the air cleanliness requirements of some special laboratories; on the other hand, current shipboard central air conditioning systems do not employ heat recovery systems, resulting in high energy consumption. These issues severely impact and restrict the conduct and efficiency improvement of shipboard laboratory research. Summary of the Invention

[0004] The technical problem this invention aims to solve is how to address the issues of low air cleanliness and excessive energy consumption in shipboard laboratories, as well as the inability to accurately control laboratory temperature. To address these problems, this invention provides an air conditioning system, a heat recovery temperature control method, and a research vessel, including an air conditioning module, a cooling module, and a heat recovery module. The air conditioning module includes a first air conditioner and a second air conditioner. The output end of the first air conditioner is connected in parallel with multiple first air outlets, which are respectively located in different laboratories. The output end of the second air conditioner is connected in parallel with multiple second air outlets, which are respectively located in multiple sections of the clean room. The cooling module is connected to the first air conditioner and the second air conditioner respectively. The cooling module is used to output and drive the chilled water to circulate between the first air conditioner, the second air conditioner and the cooling module. The heat recovery module includes a cooling water assembly, a heat recovery device, and a heat storage device. The cooling water assembly is connected to the first air conditioner and the second air conditioner. The heat storage device is connected to the first air conditioner and the second air conditioner. The two ends of the heat recovery device are respectively connected to the cooling water assembly and the heat storage device. The heat recovery device is connected to the cooling module for heat exchange. The cooling water assembly is used to output and drive cooling water to circulate among the heat recovery device, the heat storage device, the first air conditioner, and the second air conditioner.

[0005] Preferably, it further includes a pressure regulating module, the input end of which is connected to the first air conditioner and the second air conditioner, and the output end of which is connected to the cooling module. The pressure regulating module is used to regulate and maintain the pressure of the refrigerant water supplied from the air conditioning module to the cooling module.

[0006] Preferably, the first air outlet is connected to a variable air volume distributor, and the second air outlet is integrated with a high-efficiency filter, a static pressure box, a diffuser and an air volume regulating valve.

[0007] Preferably, the first air conditioner includes, in sequence along the fresh air outlet direction, a first air inlet section, a first filter section, a first heating section, a first cooling section, a first air supply section, and a first humidification section; The first air inlet section is equipped with an air damper; the first filtration section is equipped with a plate filter and a differential pressure sensor; the first cooling section is equipped with a cooling coil, the two ends of which are respectively connected to the cooling module and the constant pressure module; the first heating section is equipped with a heating coil, the two ends of which are respectively connected to the heat accumulator and the cooling water assembly; the first humidification section is equipped with an electric humidifier; and the first air supply section is equipped with a fan, a motor, and a disinfection device.

[0008] Preferably, the second air conditioner includes, in sequence along the fresh air outlet direction, a second air inlet section, a second filter section, a preheating section, a second cooling section, a second heating section, a second humidification section, a second air supply section, a noise reduction section, and a third filter section; The second air inlet section is equipped with an air damper; the second filtration section is equipped with a pre-filter and a differential pressure sensor; both the preheating section and the second heating section are equipped with heating coils, with the two ends of the heating coils connected to the heat accumulator and the cooling water assembly, respectively; the second cooling section is equipped with a cooling coil, with the two ends of the cooling coil connected to the cooling module and the constant pressure module, respectively; the second humidification section is equipped with an electric humidifier; the second air supply section is equipped with a fan and a motor; the silencer section is equipped with silencer plates; and the third filtration section is equipped with a medium-efficiency filter and a disinfection device.

[0009] Preferably, the cooling module includes multiple water chillers connected in parallel, and each water chiller includes a compressor, a condenser, and an evaporator.

[0010] Preferably, the cooling water assembly includes a shipboard central cooling system; The heat recovery device includes a cooling water pipe, which is fitted to the condenser, and the two ends of the cooling water pipe are respectively connected to the central cooling system and the heat accumulator. The heat accumulator contains a thermal phase change material.

[0011] Preferably, multiple clean rooms are arranged in parallel.

[0012] The present invention also provides a method for controlling the temperature of heat recovery, using an air conditioning system as described above, comprising the following steps: S1. After the system is powered on, check whether the sensor signal is normal, close the first valve and the second valve, open the third valve, and simultaneously open the first circulation pump and the second circulation pump, and put the first circulation pump and the second circulation pump into standby mode. The first valve is located between the heat recovery device and the heat accumulator, the second valve is located between the heat accumulator and the air conditioning module, and the third valve is a bypass valve; the first circulating pump is located between the heat recovery device and the heat accumulator, and the second circulating pump is located between the heat accumulator and the air conditioning module. S2. The controller acquires sensor signals and compares them with corresponding preset values. Based on the different signal data comparison results, it selects and switches between different working modes. The sensor signals include the inlet temperature T1 and outlet temperature T2 of the cooling water in the heat recovery unit, the inlet temperature T3 and outlet temperature T4 of the cooling water in the heat accumulator, the inlet temperature T5 of the cooling water in the air conditioning module, the outlet temperature T6 of the cooling water in the air conditioning module, and the temperature T of the phase change material in the heat accumulator. P Cooling water flow rate F1 at the inlet of the heat accumulator and cooling water flow rate F2 at the inlet of the air conditioning module; S3. When the value of T2 obtained by the controller is not less than the first preset value, and T P If the value is less than the second preset value and the controller does not receive a heating command from the air conditioning module, the heat storage mode will be activated. S4. When the controller receives the heating command from the air conditioning module, and T P If the value is not less than the third preset value, the heat dissipation mode will be activated; S5. When the value of T2 obtained by the controller is not less than the first preset value, and T P When the value is less than the second preset value and the controller receives a heating command from the air conditioning module, the hybrid mode is activated. S6, when T P If the value is less than the fourth preset value, or if there is a system malfunction, the bypass mode will be activated.

[0013] Preferably, the heat storage mode includes the following steps: S31. Open the first valve, close the third valve, and start the first circulation pump. Cooling water circulates between the heat recovery device and the heat accumulator. S32, The controller continuously acquires and monitors the values ​​of T2 and T. P Numerical value; S33, When the controller detects TP If the value is not less than the fifth preset value or the T2 value is less than the first preset value, then the first valve is closed, heat storage is paused, and the system enters standby mode. S34. The controller continuously monitors whether the air conditioning module has a heating command. If a heating command is received from the air conditioning module, it will switch to the heat release mode first.

[0014] Preferably, the heat release mode includes the following steps: S41. Open the second valve, close the third valve, start the second circulation pump, and cool water is transported from the heat accumulator to the air conditioning module; S42, The controller continuously acquires and monitors T P The numerical value and the T6 value; S43, When the controller detects T P When the value is less than the third preset value or the T6 value is not less than the sixth preset value, the second circulation pump is turned off, heat release is paused, and the system enters standby mode. S44, The controller continuously monitors the T2 value and T P The value is such that when the value of T2 is not less than the first preset value, and T... P If the value is less than the second preset value, the system will switch to mixed mode first.

[0015] Preferably, the mixing mode includes the following steps: S51. Open the first valve and the second valve, and close the third valve. At the same time, start the first circulation pump and the second circulation pump. The cooling water circulates between the heat recovery device, the heat accumulator, the air conditioning module and the cooling water assembly. S52, The controller continuously adjusts the opening degree of the first and second valves, and monitors T. p If the difference between the numerical value and the T5 value is greater than the first preset temperature difference, then the opening of the second circulation pump is increased to reduce the temperature difference and maintain the operation of the mixing mode. S53, Controller Monitoring T p If the difference between the numerical value and the T5 value is less than the second preset temperature difference, the mixing mode operation is maintained. If it is less than the second preset temperature difference, the opening of the first circulation pump is increased, and T is checked again. p Is the difference between the numerical value and the T5 value greater than the first preset temperature difference?

[0016] Preferably, the bypass mode includes the following steps: S61. Open the third valve and close the first and second valves. The cooling water in the heat recovery device and air conditioning module returns to the cooling water assembly through the bypass circuit. S62. Trigger a fault alarm, the controller records the fault code, and waits for manual reset.

[0017] Preferably, when T P If the value exceeds the seventh preset value or any sensor detects that the cooling water temperature exceeds the eighth preset value, all valves will be forced to close and the cooling fan will be started. When F1 or F2 is less than the ninth preset value of the rated flow, an alarm is triggered and the system switches to bypass mode. When the ambient temperature is lower than the tenth preset value, the electric heat tracing is activated to maintain the pipeline temperature.

[0018] The present invention also provides a research vessel equipped with an air conditioning system as described above and using the heat recovery temperature control method described above.

[0019] Compared with the prior art, the air conditioning system, heat recovery temperature control method, and research vessel provided in this embodiment of the invention have the following advantages: In this embodiment, a first air conditioner and a second air conditioner are respectively set up for ordinary laboratories and cleanrooms, so that the air cleanliness in the cleanroom can be adjusted and controlled independently to distinguish it from other ordinary laboratories, thereby meeting the air cleanliness requirements of special experiments and improving scientific research efficiency. The heat recovery module can absorb the heat absorbed by the cooling module when the laboratory is refrigerated and transfer it to the heat storage device, so as to provide heat to the first and second air conditioners when the laboratory needs to be heated later. This realizes the recovery and reuse of heat energy, avoids heat loss, reduces the energy consumption of the laboratory air conditioning system, and can also more accurately control the temperature of each laboratory. Attached Figure Description

[0020] Figure 1 This is a connection block diagram of the air conditioning system of the present invention; Figure 2 This is a structural diagram of the first air conditioner of the present invention; Figure 3 This is a structural diagram of the second air conditioner of the present invention; Figure 4 This is a connection block diagram of the present invention for heat recovery using cooling water; Figure 5 This is a block diagram illustrating the principle of heat recovery in this invention; Figure 6 This is a logic block diagram of the heat storage mode of the present invention; Figure 7 This is a logic block diagram of the heat release mode of the present invention; Figure 8 This is a logic block diagram of the hybrid mode of the present invention; Figure 9 This is a logic block diagram of the bypass mode of the present invention.

[0021] In the diagram: 1. Air conditioning module; 11. First air conditioner; 111. First air intake section; 112. First filter section; 113. First heating section; 114. First cooling section; 115. First air supply section; 116. First humidification section; 12. Second air conditioner; 121. Second air intake section; 122. Second filter section; 123. Preheating section; 124. Second cooling section; 125. Second heating section; 126. Second humidification section; 127. Second air supply section; 128. Silencing section; 129. Third filter section; 13. First air outlet; 14. Second air outlet 2. Cooling module; 21. Chiller unit; 3. Heat recovery module; 31. Cooling water assembly; 32. Heat recovery device; 33. Heat accumulator; 34. First valve; 35. Second valve; 36. Third valve; 37. First circulation pump; 38. Second circulation pump; 4. Pressure stabilizing module; 5. Laboratory; 6. Clean room. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0023] like Figures 1 to 5 As shown, a preferred embodiment of the present invention provides an air conditioning system, a heat recovery temperature control method, and a research vessel, which includes an air conditioning module 1, a cooling module 2, and a heat recovery module 3. The air conditioning module 1 includes a first air conditioner 11 and a second air conditioner 12. The output end of the first air conditioner 11 is connected in parallel with multiple first air outlets 13, which are respectively located in different laboratories 5. The output end of the second air conditioner 12 is connected in parallel with multiple second air outlets 14, which are respectively located in multiple sections of the clean room 6. The cooling module 2 is connected to the first air conditioner 11 and the second air conditioner 12 respectively. The cooling module 2 is used to output and drive the chilled water to circulate between the first air conditioner 11, the second air conditioner 12 and the cooling module 2. The heat recovery module 3 includes a cooling water assembly 31, a heat recovery device 32, and a heat storage device 33. The cooling water assembly 31 is connected to the first air conditioner 11 and the second air conditioner 12. The heat storage device 33 is connected to the first air conditioner 11 and the second air conditioner 12. The two ends of the heat recovery device 32 are respectively connected to the cooling water assembly 31 and the heat storage device 33. The heat recovery device 32 is connected to the cooling module 2 for heat exchange. The cooling water assembly 31 is used to output and drive the cooling water to circulate between the heat recovery device 32, the heat storage device 33, the first air conditioner 11, and the second air conditioner 12.

[0024] The air conditioning systems used in traditional shipborne laboratories are mostly constant air volume central air conditioning systems. They do not have separate air conditioning systems for different laboratories, which results in the air cleanliness of some laboratories not meeting the requirements and the temperature of each laboratory not being automatically controlled. This seriously affects the normal conduct of scientific research experiments. In addition, a large amount of waste heat is generated in the process of temperature control of the laboratories. This waste heat is not fully utilized, resulting in high energy consumption of air conditioning in shipborne laboratories.

[0025] In this embodiment, a first air conditioner 11 and a second air conditioner 12 are respectively provided for laboratories 5 with different levels of requirements. Multiple first air outlets 13 of the first air conditioner 11 are connected in parallel and installed in different laboratories 5. The first air conditioner 11 can meet the air cleanliness requirements of most ordinary laboratories 5, ensuring the normal operation of most ordinary scientific research experiments. Multiple second air outlets 14 of the second air conditioner 12 are also connected in parallel, but these outlets are respectively located in different areas of the cleanroom 6 with special requirements, providing a higher air cleanliness for the cleanroom 6. Of course, in other embodiments, a third air conditioner can also be provided, which can be used for ventilation in crew quarters, mess halls, engine rooms, and other shipboard rooms. Furthermore, in a specific embodiment, ordinary laboratories 5 include microbiology laboratories 5, organic geochemistry laboratories 5, inorganic geochemistry laboratories 5, basic geology laboratories 5, etc., while the cleanroom 6 includes multiple areas such as changing rooms, buffer rooms, and experimental rooms. Furthermore, each laboratory 5 and different areas of the cleanroom 6 are connected to a ventilation system, which continuously exhausts air from each laboratory 5 and the cleanroom 6 to the outside, ensuring that the indoor air is in a state of circulation, thereby ensuring that the air cleanliness meets the requirements. Finally, in some embodiments, the cooling water assembly 31 can be provided with a separate tank for storing cooling water to be used, while in another specific embodiment, the cooling water assembly 31 can be the ship's central cooling system, which provides functions such as storage, output, filtration, and recycling of cooling water.

[0026] In some embodiments, a pressure regulating module 4 is also included. The input end of the pressure regulating module 4 is connected to the first air conditioner 11 and the second air conditioner 12, and the output end of the pressure regulating module 4 is connected to the cooling module 2. The pressure regulating module 4 is used to regulate and maintain the pressure of the chilled water supplied from the air conditioning module 1 to the cooling module 2.

[0027] Specifically, after passing through the first air conditioner 11 and the second air conditioner 12, the chilled water absorbs a large amount of heat, causing changes in its pressure. Directly returning the chilled water to the cooling module 2 could easily lead to pressure fluctuations in the chilled water pipeline, potentially damaging the pipelines and valves. Therefore, a pressure stabilizing device is necessary. The basic function of this device is to maintain a constant chilled water working pressure by absorbing or releasing liquid or gas from the chilled water pipeline, preventing large pressure fluctuations due to temperature changes, preventing system overpressure (e.g., coolant expansion due to heat) or negative pressure (e.g., liquid contraction due to cooling), and protecting system pipelines and valves. It also regulates chilled water volume changes, maintains circulation pressure, compensates for volume expansion or contraction caused by temperature changes, ensures system tightness, reduces media loss or air ingress, and achieves pressure stabilization, water replenishment, and venting of the chilled water system. The pressure stabilizing device mainly includes a chilled water pump, a closed-loop pressure-stabilizing expansion tank, a spiral drain and degassing device, a water collector, a water distributor, an isolation water replenishment meter, and corresponding valves and accessories. In this embodiment, both the first air conditioner 11 and the second air conditioner 12 are connected to a pressure regulating device. After the pressure regulating device stabilizes the pressure of the chilled water, it is then transported to the cooling module 2 to complete the circulation of the chilled water.

[0028] In some embodiments, a variable air volume distributor is connected to the first air outlet 13, and a high-efficiency filter, a static pressure box, a diffuser and an air volume regulating valve are integrated into the second air outlet 14.

[0029] Specifically, the air conditioning air output from the first air conditioner 11 will sequentially pass through a fireproof damper and an air regulating damper in the ductwork before being distributed to different first air outlets 13. The distributed air conditioning air will then pass through a VAV valve (variable air volume valve) and a silencer before being distributed to different laboratories 5 via a variable air volume distributor. The air conditioning air output from the second air conditioner 12 will first pass through a fireproof damper, an air regulating damper, a VAV valve, and a silencer before being distributed to different areas of the cleanroom 6 via second air outlets 14. Each second air outlet 14 is also equipped with a high-efficiency filter and an ozone disinfection device. The ozone disinfection device and high-efficiency filter can be equipped with dedicated equipment, and the ozone disinfection device can also integrate an ultraviolet disinfection device. Furthermore, the variable air volume valve is a device used to regulate airflow in an air conditioning or ventilation system, consisting of a valve body, a motor, and temperature, humidity, and pressure sensors. The variable air volume distributor includes a programmable comfort controller, an electric damper, a temperature sensor, a pressure sensor, an electric heating element, and a controller. In actual use, the variable air volume valve and variable air volume distributor, together with the PLC controller and multiple temperature and pressure sensors, can achieve precise control of the indoor temperature and air volume of different laboratories 5, maintain the stability of the indoor temperature of each laboratory 5, and adjust the speed of the fan in the first air conditioner 11 or the second air conditioner 12, thereby ensuring the stability of the air supply pressure in the air duct and avoiding excessive air pressure fluctuations and mutual interference of air volume in different air ducts.

[0030] In some embodiments, the first air conditioner 11 includes, in sequence along the fresh air outlet direction, a first air inlet section 111, a first filter section 112, a first heating section 113, a first cooling section 114, a first air supply section 115, and a first humidification section 116. The first air inlet section 111 is equipped with an air damper; the first filtration section 112 is equipped with a plate filter and a differential pressure sensor; the first cooling section 114 is equipped with a cooling coil, with the two ends of the cooling coil connected to the cooling module 2 and the constant pressure module 4, respectively; the first heating section 113 is equipped with a heating coil, with the two ends of the heating coil connected to the heat accumulator 33 and the cooling water assembly 31, respectively; the first humidification section 116 is equipped with an electric humidifier; and the first air supply section 115 is equipped with a fan, a motor, and a disinfection device.

[0031] Specifically, the first air conditioner 11 adopts a marine-grade indirect variable air volume (VAV) air conditioner. Its main structure consists of a panel and a frame structure. The panel has internal rock wool insulation, which not only reduces noise but also inhibits heat loss, maintains the room temperature, reduces air conditioning usage, and saves energy. Both the first filter section 112 and the first air supply section 115 are equipped with detachable inspection doors for easy maintenance. The air intake damper can adjust the amount of air drawn into the first air conditioner 11. When multiple laboratories 5 require ventilation, the damper opening can be increased. When demand is low, the size of the damper can be reduced to decrease the air intake and achieve energy saving. The plate filter can be a conventional medium-efficiency or high-efficiency filter. The differential pressure sensor monitors the gas pressure difference across the plate filter. When the pressure difference is too large, it indicates severe blockage of the plate filter, and the differential pressure sensor will automatically sound an alarm to remind personnel to perform maintenance. Low-temperature refrigerant water flowing from cooling module 2 flows inside the refrigeration coil, and copper fins are installed on it. When air passes through the refrigeration coil, the refrigerant water absorbs heat. The refrigerant water is heated to lower the gas temperature, allowing the first air conditioner 11 to blow out cold air. After use, the refrigerant water flows to the pressure stabilization module 4 after heating. Meanwhile, high-temperature cooling water from the heat accumulator 33 flows through the heating coil in the first heating section 113. Air is heated as it passes through this high-temperature cooling water, enabling the first air conditioner 11 to blow out hot air. The cooled water then flows back to the central cooling system of the cooling water assembly 31. In actual use, the low-temperature refrigerant water is controlled by valves according to the actual heating or cooling requirements. The flow of high-temperature cooling water achieves stable cooling or heating; the electric humidifier in the first humidification section 116 is a conventional technology and will not be described in detail; the motor in the first air supply section 115 drives the fan to continuously draw in fresh air from the outside, allowing the fresh air to pass through the first filtration section 112, the first cooling section 114, and the first heating section in sequence, thereby achieving air filtration and cooling or heating, and finally passing through a disinfection device for disinfection treatment, wherein the disinfection device adopts a photocatalytic sterilization and disinfection device to achieve long-term continuous sterilization.

[0032] In some embodiments, the second air conditioner 12 includes, in sequence along the fresh air outlet direction, a second air inlet section 121, a second filter section 122, a preheating section 123, a second cooling section 124, a second heating section 125, a second humidification section 126, a second air supply section 127, a noise reduction section 128, and a third filter section 129. The second air inlet section 121 is equipped with an air damper; the second filtration section 122 is equipped with a pre-filter and a differential pressure sensor; both the preheating section 123 and the second heating section 125 are equipped with heating coils, with the two ends of the heating coils connected to the heat accumulator 33 and the cooling water assembly 31, respectively; the second cooling section 124 is equipped with a cooling coil, with the two ends of the cooling coil connected to the cooling module 2 and the constant pressure module 4, respectively; the second humidification section 126 is equipped with an electric humidifier; the second air supply section 127 is equipped with a fan and a motor; the silencer section 128 is equipped with silencer plates; and the third filtration section 129 is equipped with a medium-efficiency filter and a disinfection device.

[0033] Specifically, in this embodiment, since the second air conditioner 12 has higher requirements for the cleanliness of the output air compared to the first air conditioner 11, the second air conditioner 12 is equipped with two filter sections compared to the first air conditioner 11. The second filter section 122 uses a pre-filter with a filtration level of G4, and the third filter section 129 uses a medium-efficiency filter with a filtration level of G7. Together with the high-efficiency filter integrated at the second air outlet 14, the cleanliness of the air entering each area of ​​the clean room 6 can be effectively guaranteed. Differential pressure sensors are also installed in the second filter section 122 and the third filter section 129 to detect the status of the second filter section 122 and the third filter section 129.

[0034] In addition, the second air conditioner 12 is equipped with a sound-absorbing section 128 and a preheating section 123. The sound-absorbing section 128 contains sound-absorbing plates to reduce the noise generated by the second air conditioner 12 during operation, preventing noise from adversely affecting the clean room 6. The preheating section 123 is also equipped with heating coils, and high-temperature cooling water flows inside to preheat the air, thereby improving the heating efficiency of the second air conditioner 12. The cooled water used is returned to the ship's central cooling system for subsequent use.

[0035] In some embodiments, the cooling module 2 includes multiple chiller units 21 connected in parallel. Each chiller unit 21 includes a compressor, a condenser, and an evaporator. The function of the chiller unit 21 is to provide chilled water for the cooling section of the air conditioner and to transfer the heat absorbed by the cooling water to the cooling water. In actual use, the air conditioning load is determined based on the number of laboratories 5 and the size of the area, and different numbers of chillers are set accordingly. Each chiller bears a portion of the load, and the heat in the chiller is transferred to the cooling water through the heat recovery device 32. After recovering the heat from the chiller unit 21, the cooling water transfers the heat to the heat storage tank 33 for storage, to be used for subsequent air conditioning heating.

[0036] In some embodiments, the cooling water assembly 31 includes a shipboard central cooling system; The heat recovery device 32 includes a cooling water pipe, which is fitted into the condenser. The two ends of the cooling water pipe are connected to the central cooling system and the heat accumulator 33, respectively. The heat accumulator 33 is equipped with a thermal phase change material.

[0037] In this embodiment, the cooling water assembly 31 utilizes a shipboard central cooling system, which also cools other equipment on board, simplifying the overall structure and reducing costs. In other embodiments, a separate cooling water storage and output device can be provided for the air conditioning system of Laboratory 5, ensuring stable and reliable heat recovery and output. The phase change material in the heat accumulator 33 can be paraffin wax or hydrated salts, among other substances, in this embodiment.

[0038] In some embodiments, multiple cleanrooms 6 are arranged in parallel. Depending on the actual needs, multiple cleanrooms 6 are often arranged on board to meet the simultaneous needs of more scientific research work. Correspondingly, multiple second air outlets 14 connected to the second air conditioner 12 are also arranged. When necessary, multiple second air conditioners 12 can also be arranged.

[0039] See Figure 4 and Figure 5 The present invention also provides a method for controlling the temperature of heat recovery, using an air conditioning system as described above, characterized by comprising the following steps: S1. After the system is powered on, check whether the sensor signal is normal, close the first valve 34 and the second valve 35, open the third valve 36, and simultaneously open the first circulation pump 37 and the second circulation pump 38, and put the first circulation pump 37 and the second circulation pump 38 into standby mode. Among them, the first valve 34 is located between the heat recovery device 32 and the heat accumulator 33, the second valve 35 is located between the heat accumulator 33 and the air conditioning module 1, and the third valve 36 is a bypass valve; the first circulation pump 37 is located between the heat recovery device 32 and the heat accumulator 33, and the second circulation pump 38 is located between the heat accumulator 33 and the air conditioning module 1. S2. The controller acquires sensor signals and compares them with corresponding preset values. Based on the different signal data comparison results, it selects and switches between different working modes. The sensor signals include the cooling water inlet temperature T1 and outlet temperature T2 of the heat recovery device 32, the cooling water inlet temperature T3 and outlet temperature T4 of the heat accumulator 33, the cooling water inlet temperature T5 and outlet temperature T6 of the air conditioning module 1, and the phase change material temperature T of the heat accumulator 33. P Cooling water flow rate F1 at the inlet of heat accumulator 33 and cooling water flow rate F2 at the inlet of air conditioning module 1; S3. When the value of T2 obtained by the controller is not less than the first preset value, and T P If the value is less than the second preset value and the controller does not receive a heating command from the air conditioning module 1, the heat storage mode will be activated. S4. When the controller receives the heating command from air conditioning module 1, and T P If the value is not less than the third preset value, the heat dissipation mode will be activated; S5. When the value of T2 obtained by the controller is not less than the first preset value, and T P If the value is less than the second preset value and the controller receives a heating command from the air conditioning module 1, then the mixing mode is activated; S6, when T P If the value is less than the fourth preset value, or if there is a system malfunction, the bypass mode will be activated.

[0040] Specifically, in this embodiment, the air conditioning system can more accurately regulate the temperature of the air conditioning air output by the first air conditioner 11 and / or the second air conditioner 12. In step S1, a self-test procedure is first performed to check whether the various sensors, valves, pumps, and other components are in normal condition. The first valve 34 from the heat recovery device 32 to the heat storage tank 33 and the second valve 35 from the heat storage tank 33 to the air conditioning module 1 are closed, and the bypass valve is opened. The bypass valve is located between the output end of the heat recovery device 32 and the cooling water assembly 31, which can directly return the high-temperature cooling water output by the heat recovery device 32 to the ship's central cooling system for cooling.

[0041] In step S2, the controller can determine whether to switch to different working modes based on the different data signals from the various sensors. The sensor signals are monitored by flow sensors or temperature sensors located at different positions. In addition to the sensors used to detect these signals, multiple pressure sensors are also provided. The pressure sensors are mainly used to monitor the cooling water pressure P1 at the heat recovery device 32 and the cooling water pressure P2 at the air conditioning module 1. The pressure sensors are used to monitor the pipeline pressure in the entire cooling water system to prevent overpressure or leakage problems. In the actual judgment process, the working mode is determined and switched mainly by combining the temperature detected by the temperature sensor with the heating demand. The working modes are roughly divided into four types: heat storage mode, heat release mode, mixed mode, and bypass mode. The heat storage mode means that when the air conditioning module 1 has no heating demand and the temperature of the heat storage tank 33 is too low to accumulate enough heat, the heat storage mode is activated first to store heat for later use. The heat release mode, on the other hand, means that when the air conditioning module 1 has a heating demand and the temperature of the heat storage tank 33 reaches a certain requirement, the heat in the heat storage tank 33 can be quickly transferred to the first air conditioner 11 and the second air conditioner 12 of the air conditioning module 1 through cooling water. In the heating section, heating is achieved. The heating demand refers to the indoor temperature being lower than the set value, or the staff sending a heating signal through instruments such as remote control or control panel. The hybrid mode is a working mode in which the heat storage unit 33 receives a heating command while meeting the heat release and heat storage conditions, thus storing and releasing heat at the same time. The bypass mode is used when the cooling water pipeline system malfunctions or is under low load, such as when the temperature of the phase change material in the heat storage unit 33 is too low, resulting in no heat to be recovered, or when there are abnormal sensor signals and pump signals. In such cases, the heat storage unit 33 cannot receive more high-temperature cooling water, and the excess high-temperature cooling water is directly returned to the central cooling system through the bypass valve.

[0042] See Figure 6 In some embodiments, the heat storage mode includes the following steps: S31. Open the first valve 34, close the third valve 36, and start the first circulation pump 37. Cooling water circulates between the heat recovery device 32 and the heat accumulator 33. S32, The controller continuously acquires and monitors the values ​​of T2 and T. P Numerical value; S33, When the controller detects T P If the value is not less than the fifth preset value or the T2 value is less than the first preset value, then the first valve 34 is closed, heat storage is paused, and standby mode is entered. S34. The controller continuously monitors whether the air conditioning module 1 has a heating command. If a heating command is received from the air conditioning module 1, it will switch to the heat dissipation mode first.

[0043] Specifically, when the trigger condition for the heat storage mode is detected, the first valve 34 is opened to open the passage of cooling water from the heat recovery device 32 to the heat storage accumulator 33, while the third valve 36 is closed to close the bypass branch. At this time, high-temperature cooling water is output from the heat recovery device 32 to the heat storage accumulator 33. The high-temperature cooling water heats the phase change material in the heat storage accumulator 33, and the heat is absorbed by the phase change material. The cooled cooling water is then returned to the heat recovery device 32 to continue absorbing heat from the cooling water, and is then sent back to the heat storage accumulator 33, and so on in a cycle until the controller detects T. P When the value is not less than the fifth preset value or the T2 value is less than the first preset value, it indicates that the heat storage capacity of the heat accumulator 33 has reached its upper limit or the heat recovery device 32 has not recovered enough heat. In this case, the first valve 34 is closed to suspend heat storage. When a heating command is received, the system is switched to the heat release mode first. Of course, it is understood that when the first valve 34 is closed, the high-temperature cooling water in the heat recovery device 32 can flow directly back to the central cooling system through other bypass pipes, or be transported to other equipment on the ship that needs heating to provide heat, such as water heaters or kitchen equipment. In addition, it is understood that in some embodiments, the second valve 35 is also in the closed state in this heat storage mode. This part of the heat storage mode refers to the process of switching from the initial state to the heat storage mode. When switching from the heat release mode, the mixing mode, and the bypass mode to the heat storage mode, each valve needs to go through an initialization state first.

[0044] See Figure 7 In some embodiments, the heat release mode includes the following steps: S41. Open the second valve 35, close the third valve 36, start the second circulation pump 38, and cool water is delivered from the heat accumulator 33 to the air conditioning module 1; S42, The controller continuously acquires and monitors T P The numerical value and the T6 value; S43, When the controller detects T P When the value is less than the third preset value or the T6 value is not less than the sixth preset value, the second circulation pump 38 is turned off, heat release is paused, and the system enters standby mode. S44, The controller continuously monitors the T2 value and T P The value is such that when the value of T2 is not less than the first preset value, and T... P If the value is less than the second preset value, the system will switch to mixed mode first.

[0045] Specifically, when the controller detects the trigger condition for the heat release mode, it opens the second valve 35 and closes the third valve 36. At this time, the first valve 34 is also open, and the second circulation pump 38 starts. Meanwhile, the branch of the heat accumulator 33 that returns cooling water to the heat recovery system is closed. The cooling water, starting from the heat recovery device 32 and heated by the heat accumulator 33, is then transported to the heating sections of the first air conditioner 11 and the second air conditioner 12 in the air conditioning module 1 for heating. When T... P When the value of T2 is less than the third preset value, it indicates that the heat stored in the heat accumulator 33 has been released. When the value of T6 is not less than the sixth preset value, it indicates that the heating requirement has been met. At this time, the second valve 35 can be closed to stop heat release and enter standby mode. However, if the value of T2 is not less than the first preset value during heat release, it indicates that the cooling water output by the heat recovery device 32 is insufficient and can be recovered. P If the value is less than the second preset value, it indicates that the heat storage device 33 has not fully stored heat and there is still a reserve. At this time, heat storage can be carried out, thereby switching the working mode from heat release mode to mixed mode.

[0046] See Figure 8 In some embodiments, the hybrid mode includes the following steps: S51. Open the first valve 34 and the second valve 35, and close the third valve 36. At the same time, start the first circulation pump 37 and the second circulation pump 38. The cooling water circulates between the heat recovery device 32, the heat accumulator 33, the air conditioning module 1 and the cooling water assembly 31. S52, The controller continuously adjusts the opening degree of the first valve 34 and the second valve 35, and monitors T. P If the difference between the numerical value and the T5 value is greater than the first preset temperature difference, then the opening of the second circulation pump 38 is increased to reduce the temperature difference and maintain the operation of the mixing mode. S53, Controller Monitoring T P If the difference between the numerical value and the T5 value is less than the second preset temperature difference, the mixing mode operation is maintained. If it is less than the second preset temperature difference, the opening of the first circulation pump 37 is increased, and T is checked again. P Is the difference between the numerical value and the T5 value greater than the first preset temperature difference?

[0047] Specifically, when the heating demand and heat storage conditions of the air conditioner are met simultaneously, the system enters a mixed mode. At this time, the first valve 34 and the second valve 35 are both opened, and the first circulation pump 37 and the second circulation pump 38 are also started simultaneously. The heat recovery device 32 outputs high-temperature cooling water to the heat storage tank 33. After the heat storage tank 33 absorbs a portion of the heat and stores it, the high-temperature cooling water is continued to be transported by the second circulation pump 38 to the heating sections of the first air conditioner 11 and the second air conditioner 12 for heating. In the actual control process, the opening degree of the first valve 34 and the second valve 35 is adjusted to balance the flow of heat storage and heat release, thereby avoiding excessive temperature fluctuations in the heat storage tank 33 and preventing damage to the heat storage tank 33.

[0048] See Figure 9 In some embodiments, the bypass mode includes the following steps: S61. Open the third valve 36, close the first valve 34 and the second valve 35, and the cooling water in the heat recovery device 32 and the air conditioning module 1 returns to the cooling water assembly 31 through the bypass circuit. S62. Trigger a fault alarm, the controller records the fault code, and waits for manual reset.

[0049] Specifically, when a sensor malfunction, circulation pump overload, valve failure, or lack of heat recovery is detected, the cooling water is directly returned to the central cooling system through the bypass pipeline after passing through the heat recovery device 32. At this time, there is no cooling water flow between the heat recovery device 32 and the heat accumulator 33, or between the heat accumulator 33 and the air conditioning module 1, which facilitates the staff to inspect and maintain the structure of these two parts.

[0050] In some embodiments, when T P If the value exceeds the seventh preset value or any sensor detects that the cooling water temperature exceeds the eighth preset value, all valves will be forced to close and the cooling fan will be started. When F1 or F2 is less than the ninth preset value of the rated flow, an alarm is triggered and the system switches to bypass mode. When the ambient temperature is lower than the tenth preset value, the electric heat tracing is activated to maintain the pipeline temperature.

[0051] Specifically, in this embodiment, the system will encounter various faults during actual operation, such as overpressure and leakage. At this time, it is necessary to prioritize the handling of safety faults. That is, the control logic priority of the system is that safety faults are greater than the heating demand of the air conditioner and greater than the heat storage of the heat storage tank 33.

[0052] And when T PIf the value is greater than the seventh preset value or any sensor detects that the cooling water temperature is greater than the eighth preset value, it indicates that the cooling water temperature is too high, which is prone to imbalance and damage to various instruments. Therefore, it is necessary to forcibly close all valves, block the flow of cooling water, and start the cooling fan to cool down the heat recovery component, heat accumulator 33 and pipelines along the way.

[0053] When F1 or F2 is less than the ninth preset value of the rated flow, it indicates that the overall flow of the cooling water is too low and below the preset flow threshold. At this time, the cooling water cannot perform heat storage and heat release work, and it can be determined that there is a cooling water leak in some pipelines. Therefore, it is necessary to guide the cooling water directly back to the central cooling system through the bypass pipeline and issue an alarm to facilitate subsequent maintenance work.

[0054] When the ambient temperature is lower than the tenth preset value, it indicates that the ambient temperature is too low. The heat recovered by the heat recovery device 32 alone is insufficient to maintain the state of the phase change material in the heat storage device 33. Therefore, it is necessary to turn on the electric heat tracing at the heat storage device 33 to maintain the temperature of the pipeline and avoid the phase change material in the heat storage device 33 from solidifying and causing blockage.

[0055] Furthermore, in one specific embodiment, the first preset value is 35℃, the second preset value is 48℃, the third preset value is 40℃, the fourth preset value is 35℃, the fifth preset value is 50℃, the sixth preset value is 45℃, the seventh preset value is 60℃, the eighth preset value is 65℃, the ninth preset value is 30%, the tenth preset value is 5℃, the first preset temperature difference is 8℃, and the second preset temperature difference is 2℃. The heating commands include commands from staff via instruments to heat the room to the preset temperature when the indoor temperature is below the set value.

[0056] The present invention also provides a research vessel equipped with an air conditioning system as described above, and also uses the heat recovery temperature control method described above.

[0057] In summary, the embodiments of the present invention provide an air conditioning system, a heat recovery temperature control method, and a research vessel. A first air conditioner 11 and a second air conditioner 12 are respectively installed for the ordinary laboratory 5 and the cleanroom 6, thereby enabling independent adjustment and control of the air cleanliness within the cleanroom 6, distinguishing it from other ordinary laboratories 5, thus meeting the air cleanliness requirements of special experiments and improving research efficiency. The heat recovery module 3 absorbs the heat absorbed by the cooling module 2 during the cooling of the laboratory 5 and transfers it to the heat storage device 33. This provides heat to the first air conditioner 11 and the second air conditioner 12 when the laboratory 5 needs to be heated later, realizing the recovery and reuse of heat energy, avoiding heat loss, reducing the energy consumption of the air conditioning system in the laboratory 5, and enabling more precise temperature control of each laboratory 5. Furthermore, in actual temperature control, three operating modes are set for the heating and heat storage states: heat storage mode, heat release mode, and mixed mode. By setting different trigger conditions, the entire system can switch between these three operating modes. While meeting the precise heating and temperature control requirements of the first air conditioner 11 and the second air conditioner 12, it also takes into account the heat recovery from the cooling unit and stores the recovered heat in the heat storage tank 33 for use by the first air conditioner 11 and the second air conditioner 12, greatly saving the energy consumption of the air conditioning system. In addition, a similar structure can be used for the heat storage tank 33 to recover heat from the ship's engine section and supply the stored heat to the galley equipment.

[0058] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An air conditioning system for ventilation of shipboard laboratories and clean rooms, characterized in that, include: An air conditioning module includes a first air conditioner and a second air conditioner. The output end of the first air conditioner is connected in parallel with multiple first air outlets, and the multiple first air outlets are respectively located in different laboratories. The output end of the second air conditioner is connected in parallel with multiple second air outlets, which are respectively located in multiple sections of the clean room; A cooling module is connected to the first air conditioner and the second air conditioner respectively. The cooling module is used to output and drive chilled water to circulate between the first air conditioner, the second air conditioner and the cooling module. A heat recovery module includes a cooling water assembly, a heat recovery device, and a heat storage tank. The cooling water assembly is connected to the first air conditioner and the second air conditioner. The heat storage tank is also connected to the first air conditioner and the second air conditioner. The two ends of the heat recovery device are respectively connected to the cooling water assembly and the heat storage tank. The heat recovery device is connected to the cooling module for heat exchange. The cooling water assembly is used to output and drive cooling water to circulate among the heat recovery device, the heat storage tank, the first air conditioner, and the second air conditioner. A pressure regulating module, wherein the input end of the pressure regulating module is connected to the first air conditioner and the second air conditioner, and the output end of the pressure regulating module is connected to the cooling module, and the pressure regulating module is used to regulate and maintain the pressure of the refrigerant water supplied from the air conditioning module to the cooling module; The first air conditioner includes, in sequence along the fresh air outlet direction, a first air inlet section, a first filter section, a first heating section, a first cooling section, a first air supply section, and a first humidification section; The first air inlet section is equipped with an air damper; the first filtration section is equipped with a plate filter and a differential pressure sensor; the first cooling section is equipped with a cooling coil, the two ends of which are respectively connected to the cooling module and the constant pressure module; the first heating section is equipped with a heating coil, the two ends of which are respectively connected to the heat accumulator and the cooling water assembly; the first humidification section is equipped with an electric humidifier; and the first air supply section is equipped with a fan, a motor, and a disinfection device. The second air conditioner, along the fresh air outlet direction, includes, in sequence, a second air inlet section, a second filter section, a preheating section, a second cooling section, a second heating section, a second humidification section, a second air supply section, a silencer section, and a third filter section; The second air inlet section is equipped with an air damper; the second filtration section is equipped with a pre-filter and a differential pressure sensor; both the preheating section and the second heating section are equipped with heating coils, with the two ends of the heating coils connected to the heat accumulator and the cooling water assembly, respectively; the second cooling section is equipped with a cooling coil, with the two ends of the cooling coil connected to the cooling module and the constant pressure module, respectively; the second humidification section is equipped with an electric humidifier; the second air supply section is equipped with a fan and a motor; the silencer section is equipped with silencer plates; and the third filtration section is equipped with a medium-efficiency filter and a disinfection device.

2. The air conditioning system according to claim 1, characterized in that, The first air outlet is connected to a variable air volume distributor, and the second air outlet is integrated with a high-efficiency filter, a static pressure box, a diffuser and an air volume regulating valve.

3. The air conditioning system according to claim 1, characterized in that, The cooling module includes multiple chiller units connected in parallel, and each chiller unit includes a compressor, a condenser, and an evaporator.

4. The air conditioning system according to claim 3, characterized in that, The cooling water assembly includes a shipboard central cooling system; The heat recovery device includes a cooling water pipe, which is fitted to the condenser, and the two ends of the cooling water pipe are respectively connected to the central cooling system and the heat accumulator. The heat accumulator contains a thermal phase change material.

5. The air conditioning system according to claim 1, characterized in that, Multiple clean rooms are connected in parallel.

6. A method for controlling heat recovery temperature, employing an air conditioning system as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1. After the system is powered on, check whether the sensor signal is normal, close the first valve and the second valve, open the third valve, and simultaneously open the first circulation pump and the second circulation pump, and put the first circulation pump and the second circulation pump into standby mode. The first valve is located between the heat recovery device and the heat accumulator, the second valve is located between the heat accumulator and the air conditioning module, and the third valve is a bypass valve; the first circulating pump is located between the heat recovery device and the heat accumulator, and the second circulating pump is located between the heat accumulator and the air conditioning module. S2. The controller acquires sensor signals and compares them with corresponding preset values. Based on the different signal data comparison results, it selects and switches between different working modes. The sensor signals include the inlet temperature T1 and outlet temperature T2 of the cooling water in the heat recovery unit, the inlet temperature T3 and outlet temperature T4 of the cooling water in the heat accumulator, the inlet temperature T5 of the cooling water in the air conditioning module, the outlet temperature T6 of the cooling water in the air conditioning module, and the temperature T of the phase change material in the heat accumulator. P Cooling water flow rate F1 at the inlet of the heat accumulator and cooling water flow rate F2 at the inlet of the air conditioning module; S3. When the value of T2 obtained by the controller is not less than the first preset value, and T P If the value is less than the second preset value and the controller does not receive a heating command from the air conditioning module, the heat storage mode will be activated. S4. When the controller receives the heating command from the air conditioning module, and T P If the value is not less than the third preset value, the heat dissipation mode will be activated; S5. When the value of T2 obtained by the controller is not less than the first preset value, and T P When the value is less than the second preset value and the controller receives a heating command from the air conditioning module, the hybrid mode is activated. S6, when T P If the value is less than the fourth preset value, or if there is a system malfunction, the bypass mode will be activated.

7. The heat recovery temperature control method according to claim 6, characterized in that, The heat storage mode includes the following steps: S31. Open the first valve, close the third valve, and start the first circulation pump. Cooling water circulates between the heat recovery device and the heat accumulator. S32, The controller continuously acquires and monitors the values ​​of T2 and T. P Numerical value; S33, When the controller detects T P If the value is not less than the fifth preset value or the T2 value is less than the first preset value, then the first valve is closed, heat storage is paused, and the system enters standby mode. S34. The controller continuously monitors whether the air conditioning module has a heating command. If a heating command is received from the air conditioning module, it will switch to the heat dissipation mode first.

8. The heat recovery temperature control method according to claim 6, characterized in that, The exothermic mode includes the following steps: S41. Open the second valve, close the third valve, start the second circulation pump, and cool water is transported from the heat accumulator to the air conditioning module; S42, The controller continuously acquires and monitors T P The numerical value and the T6 value; S43, When the controller detects T P When the value is less than the third preset value or the T6 value is not less than the sixth preset value, the second circulation pump is turned off, heat release is paused, and the system enters standby mode. S44, The controller continuously monitors the T2 value and T P The value is such that when the value of T2 is not less than the first preset value, and T... P If the value is less than the second preset value, the system will switch to mixed mode first.

9. The heat recovery temperature control method according to claim 6, characterized in that, The hybrid mode includes the following steps: S51. Open the first valve and the second valve, and close the third valve. At the same time, start the first circulation pump and the second circulation pump. The cooling water circulates between the heat recovery device, the heat accumulator, the air conditioning module and the cooling water assembly. S52, The controller continuously adjusts the opening degree of the first and second valves, and monitors T. p If the difference between the numerical value and the T5 value is greater than the first preset temperature difference, then the opening of the second circulation pump is increased to reduce the temperature difference and maintain the operation of the mixing mode. S53, Controller Monitoring T p If the difference between the numerical value and the T5 value is less than the second preset temperature difference, the mixing mode operation is maintained. If it is less than the second preset temperature difference, the opening of the first circulation pump is increased, and T is checked again. p Is the difference between the numerical value and the T5 value greater than the first preset temperature difference? 10. The heat recovery temperature control method according to claim 6, characterized in that, Bypass mode includes the following steps: S61. Open the third valve and close the first and second valves. The cooling water in the heat recovery device and air conditioning module returns to the cooling water assembly through the bypass circuit. S62. Trigger a fault alarm, the controller records the fault code, and waits for manual reset.

11. The heat recovery temperature control method according to claim 6, characterized in that, When T P If the value exceeds the seventh preset value or any sensor detects that the cooling water temperature exceeds the eighth preset value, all valves will be forced to close and the cooling fan will be started. When F1 or F2 is less than the ninth preset value of the rated flow, an alarm is triggered and the system switches to bypass mode. When the ambient temperature is lower than the tenth preset value, the electric heat tracing is activated to maintain the pipeline temperature.

12. A research vessel, characterized in that, An air conditioning system as described in any one of claims 1 to 5 is provided.

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