Cold and heat source device for laboratory

Abstract

The invention provides a cold and heat source device for a laboratory. The cold and heat source device of the laboratory comprises a solution regeneration part which comprises a solution regeneration tower and a first pipeline, the solution regeneration tower is provided with a first air duct, a spraying end and a liquid outlet end, and the spraying end is used for spraying a solution to the first air duct; a ventilation channel is formed in the heat exchange part, and the heat exchange part is constructed to be capable of conducting sensible heat recovery on return air in the ventilation channel; the heat exchange part comprises a spraying tower, a second pipeline and a heat pump system, the spraying tower is provided with a second air channel, a spraying opening and a liquid outlet, the spraying opening is used for spraying a solution to the second air channel, and the first air channel, the ventilation channel and the second air channel are sequentially communicated; the heat pump system is used for conducting heat transfer on the circulating water pipeline and the second pipeline, so that the circulating water pipeline has a winter mode for preparing hot water in winter and a summer mode for preparing cold water in summer. According to the technical scheme, the cold and heat source device of the laboratory can be used for preparing cold water and hot water while improving the return air sensible heat recovery efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of cold and hot sources, and in particular to a cold and hot source device for a laboratory. Background Art

[0002] P2 laboratory (Biosafety Level 2 Laboratory), also known as the secondary safety biological laboratory, is currently the most widely used type of biosafety laboratory, mainly used to study microorganisms with medium potential hazards to humans, the environment and animals. Because the air in the laboratory contains toxic and harmful substances such as bacteria and viruses, it is generally not allowed to be recycled and requires comprehensive exhaust.

[0003] The air conditioning system of the P2 laboratory is mainly in the form of fresh air air conditioning units. Fresh air is introduced into the fresh air air conditioning units from the outside, and then pollutants such as dust, pollen, and bacteria in the fresh air are removed through air filters. The fresh air is then heated, cooled, and temperature and humidity adjusted, etc. The treated fresh air is sent into the room through the air supply duct. At the same time, the dirty air in the room is discharged through the exhaust system.

[0004] In the prior art, in order to prevent cross contamination, heat pipes or direct expansion coils are generally used to recover sensible heat between exhaust air and fresh air. Although this method recovers energy to a certain extent, the heat recovery efficiency is low. In addition, due to the high air treatment requirements of P2 laboratories, fresh air air conditioning units usually need to introduce cold and heat sources from the outside, that is, cold water or hot water, to support their temperature and humidity regulation functions. The introduction of external cold and heat sources not only reduces the overall operating energy efficiency of the system and increases energy consumption, but also leads to high configuration requirements. Summary of the invention

[0005] The main purpose of the present invention is to provide a laboratory cold and heat source device, which can improve the return air sensible heat recovery efficiency and prepare cold water and hot water.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a cold and heat source device for a laboratory, comprising: a solution regeneration part, comprising a solution regeneration tower and a first pipeline, the solution regeneration tower having a first air duct, a spray end and a liquid outlet end, the spray end is used to spray the solution to the first air duct, and the first pipeline is used to connect the spray end and the liquid outlet end; a heat exchange part, located on one side of the solution regeneration part, a ventilation channel is provided on the heat exchange part, and the heat exchange part is constructed to be able to recover sensible heat of the return air in the ventilation channel; at least one heat exchange part, located on the side of the heat exchange part away from the solution regeneration part, the heat exchange part comprises a spray tower, a second pipeline and a heat pump system, the spray tower has a second air duct, a spray port and a liquid outlet, the spray port is used to spray the solution to the second air duct, the second pipeline is used to connect the spray port and the liquid outlet, the first air duct, the ventilation channel and the second air duct are connected in sequence; a circulating water pipeline, having a water inlet and a water outlet, and the heat pump system is used to transfer heat to the circulating water pipeline and the second pipeline, so that the circulating water pipeline has a winter mode for preparing hot water in winter and a summer mode for preparing cold water in summer.

[0007] Furthermore, there are two heat exchange parts, the two second air ducts are connected, one of the second air ducts in the two heat exchange parts is connected to the ventilation channel, and a fan is provided on the side of the other second air duct in the two heat exchange parts away from the heat exchange part.

[0008] Furthermore, water is provided in a spray tower close to the heat exchange part of the two heat exchange parts, and a salt solution is provided in a spray tower far from the heat exchange part of the two heat exchange parts.

[0009] Furthermore, a heating element is provided on the outer periphery of the first pipeline, and the heating element is used to heat the solution in the first pipeline.

[0010] Furthermore, the laboratory's cold and hot source device also includes a liquid supply pipeline and a first valve located on the liquid supply pipeline. The heating element is located on the periphery of the liquid supply pipeline. The water inlet of the liquid supply pipeline is connected to the water outlet of the circulating water pipeline, and the water outlet of the liquid supply pipeline is connected to the water inlet of the circulating water pipeline.

[0011] Furthermore, the laboratory's cold and hot source device also includes a third pipeline, a first pump body is provided on the first pipeline, an inlet of the third pipeline is connected to an outlet of the first pump body, and an outlet of the third pipeline is connected to the interior of a spray tower provided with a salt solution in one of the two spray towers.

[0012] Furthermore, the laboratory's cold and heat source device also includes a fourth pipeline, a second pump body is provided on the second pipeline, the outlet of the second pump body corresponding to the spray tower provided with a salt solution is connected to the inlet of the fourth pipeline, and the outlet of the fourth pipeline is connected to the interior of the solution regeneration tower.

[0013] Furthermore, heat exchange components are provided on the fourth pipeline and the third pipeline.

[0014] Furthermore, the laboratory's cold and heat source device also includes a water inlet pipe and a connecting pipe. The water inlet pipe is provided with a second valve. The water inlet pipe is connected to the solution regeneration tower. One end of the connecting pipe is connected to the solution regeneration tower, and the other end of the connecting pipe is connected to the interior of the spray tower provided with a salt solution in the two spray towers.

[0015] Furthermore, the heat pump system includes a heat exchange pipeline and a compressor, a four-way valve, a first heat exchanger, a throttle valve and a second heat exchanger arranged on the heat exchange pipeline. The first heat exchanger is located at the periphery of the second pipeline, and the second heat exchanger is located at the periphery of the circulating water pipeline.

[0016] Furthermore, a water storage tank and a fluid power component are provided on the circulating water pipeline, and the fluid power component is located downstream of the water storage tank.

[0017] Furthermore, the cold and heat source device of the laboratory also includes: a first wind shell, the inlet of the first wind shell is used to allow return air to enter, and the outlet of the first wind shell is connected to the inlet of the first air duct of the solution regeneration part; a second wind shell, the inlet of the second wind shell is connected to the first wind shell, the inlet of the second wind shell is located between the inlet of the first wind shell and the outlet of the first wind shell, the second wind shell is provided with a first air valve, and the outlet of the second wind shell is connected to the ventilation channel of the heat exchange part.

[0018] By applying the technical solution of the present invention, the ventilation channel of the heat exchange part recovers the sensible heat of the return air, and in the present application, a solution regeneration tower is arranged upstream of the heat exchange part, and by spraying the solution on the return air in the solution regeneration tower, the return air can be subjected to isenthalpic cooling treatment in the summer mode, which effectively improves the sensible heat recovery efficiency and thus improves the energy utilization efficiency; at the same time, by arranging a heat pump system and a spray tower, and the heat pump system can transfer heat to the circulating water pipeline and the second pipeline, so that the return air can be used to prepare cold water and hot water according to seasonal needs, that is, it is possible to prepare cold water in summer and hot water in winter. When preparing cold water in summer, the spray tower is used as a cooling tower to discharge heat; when preparing hot water in winter, the spray tower can be used as a heat source tower. In this way, there is no need to set up additional external cold and heat sources, which not only greatly reduces the operating energy efficiency and energy consumption of the laboratory air-conditioning system, but also reduces the configuration requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic structural diagram of an embodiment of a cold and hot source device for a laboratory of the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 4. Second pipeline; 5. Connecting pipeline; 6. Third pipeline; 7. Fourth pipeline; 8. Circulating water pipeline; 9. First pipeline; 10. Solution regeneration tower; 11. First pump body; 12. Heating element; 13. Third valve; 14. Heat exchange component; 15. First valve; 16. Second valve; 17. Liquid supply pipeline; 20. Heat exchange part; 21. Heat exchange pipeline; 40. Spray tower; 41. Second pump body; 42. Fourth valve; 50. Fan; 70. Heat pump system; 71. Compressor; 72. Four-way valve; 73. First heat exchanger; 74. Throttle valve; 75. Second heat exchanger; 76. Heat exchange pipeline; 80. Water storage tank; 81. Fluid power component; 90. First air valve; 91. Second air valve. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] like Figure 1 As shown, an embodiment of the present invention provides a cold and heat source device for a laboratory. The cold and heat source device for the laboratory includes: a solution regeneration unit, including a solution regeneration tower 10 and a first pipeline 9, the solution regeneration tower 10 has a first air duct, a spray end and a liquid outlet end, the spray end is used to spray the solution to the first air duct, and the first pipeline 9 is used to connect the spray end and the liquid outlet end; a heat exchange unit 20, located on one side of the solution regeneration unit, the heat exchange unit 20 is provided with a ventilation channel, and the heat exchange unit 20 is constructed to be able to recover sensible heat from the return air in the ventilation channel; at least one heat exchange unit, located on the side of the heat exchange unit 20 away from the solution regeneration unit The heat exchange part includes a spray tower 40, a second pipeline 4 and a heat pump system 70. The spray tower 40 has a second air duct, a spray port and a liquid outlet. The spray port is used to spray the solution to the second air duct. The second pipeline 4 is used to connect the spray port and the liquid outlet. The first air duct, the ventilation channel and the second air duct are connected in sequence; the circulating water pipeline 8 has a water inlet and a water outlet. The heat pump system 70 is used to transfer heat between the circulating water pipeline 8 and the second pipeline 4, so that the circulating water pipeline 8 has a winter mode for preparing hot water in winter and a summer mode for preparing cold water in summer.

[0025] In the above technical scheme, the ventilation channel of the heat exchange part 20 recovers the sensible heat of the return air, while in the present application, a solution regeneration tower 10 is arranged upstream of the heat exchange part 20. By spraying the solution on the return air in the solution regeneration tower 10, the return air can be subjected to isenthalpic cooling treatment in the summer mode, which effectively improves the sensible heat recovery efficiency and thus improves the energy utilization efficiency; at the same time, by arranging the heat pump system 70 and the spray tower 40, and the heat pump system 70 can transfer heat to the circulating water pipeline 8 and the second pipeline 4, the return air can be used to prepare cold water and hot water according to seasonal needs, that is, cold water can be prepared in summer and hot water can be prepared in winter. When preparing cold water in summer, the spray tower 40 is used as a cooling tower to discharge heat; when preparing hot water in winter, the spray tower 40 can be used as a heat source tower. In this way, there is no need to set up additional external cold and heat sources, which not only greatly reduces the operating energy efficiency and energy consumption of the laboratory air-conditioning system, but also reduces the configuration requirements.

[0026] Furthermore, a salt solution is provided in the solution regeneration tower 10. When the salt solution is sprayed, the bacteria, viruses and other microorganisms in the return air can be effectively sterilized and disinfected, thereby ensuring the hygienic safety of the laboratory exhaust air and maintaining the biological safety of the laboratory environment.

[0027] Furthermore, in the winter mode, the return air can be used to take away the water in the salt solution in the solution regeneration tower 10 to concentrate and regenerate the solution.

[0028] Preferably, if Figure 1 As shown, in an embodiment of the present invention, the heat exchange part 20 is a sensible heat recovery device, which can recover the sensible heat of the return air for precooling or preheating the fresh air; wherein the energy recovered by the sensible heat recovery device can be transferred to the heat exchanger for precooling or preheating the fresh air via a heat exchange pipeline 21 with a heat recovery medium inside, so that not only the fresh air can be precooled or preheated, but also cross-contamination between the fresh air and the return air can be avoided.

[0029] like Figure 1 As shown, in an embodiment of the present invention, there are two heat exchange parts, the two second air ducts are connected, one of the second air ducts in the two heat exchange parts is connected to the ventilation channel, and a fan 50 is provided on the side of the other second air duct in the two heat exchange parts away from the heat exchange part 20.

[0030] In the above technical solution, the two heat exchange parts can exchange heat with the return air in turn, which can increase the contact area and time between the return air and the solution, significantly enhance the heat exchange effect, and improve the heat recovery efficiency of the entire system; and the setting of the fan 50 can provide power for the return air, so that the return air flows through the first air duct, the ventilation duct and the second air duct in turn.

[0031] In one embodiment, there may be one or more heat exchange parts, wherein the more than two second air ducts are connected in sequence.

[0032] like Figure 1 As shown, in the embodiment of the present invention, water is provided in the spray tower 40 close to the heat exchange part 20 of the two heat exchange parts, and salt solution is provided in the spray tower 40 far from the heat exchange part 20 of the two heat exchange parts.

[0033] In the above technical solution, relative to the two spray towers 40 being provided with salt solution, in the present application, water is provided in the spray tower 40 close to the heat exchange part 20 of the two heat exchange parts, and salt solution is provided in the spray tower 40 far from the heat exchange part 20 of the two heat exchange parts. In the summer mode, the spray tower 40 provided with water can reduce the temperature rise of the return air, so that the return air temperature of the second air duct entering the spray tower 40 provided with salt solution can be lower, thereby reducing the condensation temperature of the heat pump system 70 corresponding to the spray tower 40 provided with salt solution, and improving the cooling efficiency.

[0034] Furthermore, the use of salt solution in the spray tower 40 away from the heat exchange part 20 can not only perform efficient heat exchange, but also utilize the hygroscopicity and bactericidal and disinfecting properties of the salt solution to further purify the return air. The salt solution is regenerated and concentrated in the winter mode, and there is no risk of freezing, thereby ensuring the stable operation of the system.

[0035] It should be noted that, in the embodiment of the present invention, the treatment of the return air by the spray tower 40 equipped with water is mainly manifested as an increase in latent heat, while the increase in sensible heat is relatively small, which means that the temperature increase of the return air is limited, but its moisture content is significantly increased. Therefore, compared with the case where a salt solution is provided in the spray tower 40 close to the heat exchange part 20, the temperature rise of the return air in the spray tower 40 equipped with water is smaller.

[0036] It should be noted that, in the embodiment of the present invention, the spray tower 40 provided with water is a water spray tower, and the spray tower 40 provided with a salt solution is a solution spray tower. In the winter mode, the return air can be used to regenerate the dilute solution in the solution spray tower. It should be noted that, in the embodiment of the present invention, the solution regeneration tower 10, the heat exchange part 20, the water spray tower, the solution spray tower and the fan 50 are sequentially arranged along the air flow direction.

[0037] like Figure 1 As shown, in the embodiment of the present invention, a heating element 12 is provided on the outer periphery of the first pipeline 9 , and the heating element 12 is used to heat the solution in the first pipeline 9 .

[0038] In the above technical solution, in the winter mode, the heating element 12 heats the spray solution in the first pipeline 9, which can increase the temperature of the solution. During the solution regeneration process in the solution regeneration tower 10, the return air can more effectively absorb the moisture in the heated solution, which can increase the solution regeneration amount, that is, the solution concentration effect can be improved.

[0039] like Figure 1 As shown, in an embodiment of the present invention, the cold and hot source device of the laboratory also includes a liquid supply pipeline 17 and a first valve 15 located on the liquid supply pipeline 17, the heating element 12 is located on the outer periphery of the liquid supply pipeline 17, the water inlet of the liquid supply pipeline 17 is connected to the water outlet of the circulating water pipeline 8, and the water outlet of the liquid supply pipeline 17 is connected to the water inlet of the circulating water pipeline 8.

[0040] In the above technical solution, in the winter mode, the hot water in the circulating water pipeline 8 is introduced into the liquid supply pipeline 17, and the liquid supply pipeline 17 transfers the heat to the solution in the first pipeline 9 through the heating element 12, thereby effectively increasing the solution temperature in the solution regeneration tower 10. During the solution regeneration process in the solution regeneration tower 10, the return air can more effectively absorb the moisture in the heated solution, which can increase the solution regeneration amount, that is, the solution concentration effect can be improved.

[0041] In one embodiment, the liquid supply pipeline 17 and the first valve 15 may not be provided, and the heating element 12 may be provided as an electric heater.

[0042] like Figure 1 As shown, in an embodiment of the present invention, the cold and hot source device of the laboratory also includes a third pipeline 6, a first pump body 11 is provided on the first pipeline 9, the inlet of the third pipeline 6 is connected to the outlet of the first pump body 11, and the outlet of the third pipeline 6 is connected to the interior of the spray tower 40 provided with a salt solution in the two spray towers.

[0043] In the above technical solution, when in winter mode, by setting the third pipeline 6, the regenerated solution in the solution regeneration tower 10 can flow from the first pump body 11 through the third pipeline 6 to the spray tower 40 provided with a salt solution. In this way, the solution concentration in the spray tower 40 provided with a salt solution can be adjusted, thereby avoiding the risk of freezing of the solution in the spray tower 40 provided with a salt solution.

[0044] Preferably, in the embodiment of the present invention, one end of the third pipeline 6 is connected to the first pipeline 9 , and the connecting position of the third pipeline 6 and the first pipeline 9 is located at the outlet position of the first pump body 11 .

[0045] Specifically, in an embodiment of the present invention, a third valve 13 is provided on the third pipeline 6. When in winter mode and the solution needs to be regenerated, the third valve 13 can be opened, so that a solution with a higher concentration can be introduced into the spray tower 40 provided with a salt solution; when in summer mode, the third valve 13 is in a closed state.

[0046] Furthermore, the first pump body 11 can also provide solution conveying power for the solution regeneration tower 10 , so that the solution reaches the spraying end through the liquid outlet end of the first pipeline 9 .

[0047] When in winter mode, the return air is cooled in the spray tower 40, so that condensed water will be precipitated in the return air and mixed with the solution. Therefore, the solution concentration of the spray tower 40 provided with the salt solution will decrease. When the solution concentration decreases to a certain extent, the freezing point of the solution rises, and there is a risk of freezing of the solution, and the heat exchange efficiency will decrease. Therefore, if Figure 1 As shown, in an embodiment of the present invention, the cold and heat source device of the laboratory also includes a fourth pipeline 7, a second pump body 41 is provided on the second pipeline 4, the outlet of the second pump body 41 corresponding to the spray tower 40 provided with a salt solution is connected to the inlet of the fourth pipeline 7, and the outlet of the fourth pipeline 7 is connected to the interior of the solution regeneration tower 10.

[0048] In the above technical solution, when in winter mode, when the solution concentration in the spray tower 40 provided with a salt solution is too low and there is a risk of freezing, by setting the fourth pipeline 7, the lower concentration solution in the spray tower 40 can be discharged from the second pump body 41 through the fourth pipeline 7 into the solution regeneration tower 10 for concentration and regeneration, and then the solution in the solution regeneration tower 10 can be discharged from the first pump body 11 through the third pipeline 6 to the spray tower 40 provided with a salt solution. In this way, the solution concentration in the spray tower 40 provided with a salt solution can be increased to regenerate the solution in the spray tower 40 provided with a salt solution, thereby avoiding the phenomenon of freezing caused by low solution concentration.

[0049] Preferably, in the embodiment of the present invention, one end of the fourth pipeline 7 is connected to the second pipeline 4 of the spray tower 40 provided with the salt solution, and the connecting position of the fourth pipeline 7 and the second pipeline 4 is located at the outlet position of the second pump body 41 .

[0050] Specifically, in an embodiment of the present invention, a fourth valve 42 is provided on the fourth pipeline 7. When in winter mode and solution regeneration is required, the fourth valve 42 is opened and the third valve 13 is opened; when in summer mode, the fourth valve 42 is closed and the third valve 13 is closed.

[0051] It should be noted that the second pump body 41 can also provide liquid conveying power for the spray tower 40, so that the solution reaches the spray port through the liquid outlet of the second pipeline 4.

[0052] like Figure 1 As shown, in the embodiment of the present invention, the fourth pipeline 7 and the third pipeline 6 are provided with a heat exchange component 14 .

[0053] In the above technical solution, since the fourth pipeline 7 conveys a dilute solution with a lower temperature to the solution regeneration tower 10, and the third pipeline 6 conveys a concentrated solution with a higher temperature to the spray tower 40 provided with a salt solution, if the two are directly mixed, there will be heat loss. By providing a heat exchange component 14, the solution in the fourth pipeline 7 and the solution in the third pipeline 6 can be heat exchanged, thereby reducing mixing losses.

[0054] Furthermore, the heat exchange component 14 can recover heat from the concentrated solution and the dilute solution to increase the temperature of the solution during solution concentration and regeneration.

[0055] Specifically, in the embodiment of the present invention, the heat exchange component 14 includes but is not limited to a plate heat exchanger.

[0056] In one embodiment, a salt solution may be provided in both spray towers 40, a connecting pipeline is provided between the two spray towers 40 to connect the two spray towers 40, the inlet of the third pipeline 6 is connected to the outlet of the first pump body 11 of the solution regeneration tower 10, the outlet of the third pipeline 6 is connected to the spray tower 40 of the two spray towers 40 away from the solution regeneration tower 10, the inlet of the fourth pipeline 7 is connected to the outlet of the second pump body 41 corresponding to the spray tower 40 of the two spray towers 40 close to the solution regeneration tower 10, and the outlet of the fourth pipeline 7 is connected to the solution regeneration tower 10, so that the solutions in the two spray towers 40 can enter the solution regeneration tower 10 to regenerate the solutions in the two spray towers 40, thereby avoiding the occurrence of freezing due to low solution concentration.

[0057] like Figure 1 As shown, in an embodiment of the present invention, the cold and heat source device of the laboratory also includes a water inlet pipe and a connecting pipe 5, the water inlet pipe is provided with a second valve 16, the water inlet pipe is connected to the solution regeneration tower 10, one end of the connecting pipe 5 is connected to the solution regeneration tower 10, and the other end of the connecting pipe 5 is connected to the interior of the spray tower 40 provided with a salt solution in the two spray towers 40.

[0058] In the above technical solution, in the summer mode, the solution regeneration tower 10 can be replenished with water through the second valve 16, and since the connecting pipe 5 is used to connect the solution regeneration tower 10 and the spray tower 40 provided with a salt solution, it can not only maintain the balance of solution concentration and ensure the heat removal capacity of the solution spray tower, that is, reduce the spray concentration of the regeneration solution to improve the isenthalpic cooling effect.

[0059] like Figure 1 As shown, in an embodiment of the present invention, the heat pump system 70 includes a heat exchange pipeline 76 and a compressor 71, a four-way valve 72, a first heat exchanger 73, a throttle valve 74 and a second heat exchanger 75 arranged on the heat exchange pipeline 76, the first heat exchanger 73 is located on the periphery of the second pipeline 4, and the second heat exchanger 75 is located on the periphery of the circulating water pipeline 8.

[0060] In the above technical solution, in the summer mode, the heat pump system 70 is in the cooling mode, and the first heat exchanger 73 is used as a condenser. In this way, the return air after sensible heat recovery passes through the two spray towers 40 in sequence, and the circulating water in the spray tower is used as the cooling water of the corresponding first heat exchanger 73, and the circulating solution in the solution spray tower is used as the cooling medium of the corresponding first heat exchanger 73, respectively removing the heat of the condensers in the two heat pump systems 70, and the second heat exchanger 75 is used as an evaporator. In this way, the two evaporators can be used in sequence. The circulating water pipeline 8 is cooled to realize the step-by-step utilization of cold energy; in the winter mode, the heat pump system 70 is in the heating mode, the first heat exchanger 73 serves as the evaporator, the circulating water in the water spray tower serves as the heat source of the corresponding first heat exchanger 73, and the solution in the solution spray tower serves as the heat source of the corresponding first heat exchanger 73, and the return air is cooled in turn, wherein the solution is used as the terminal spray for cooling without the risk of freezing, the second heat exchanger 75 serves as the condenser, and the two second heat exchangers 75 can perform step-by-step heating on the circulating water pipeline 8.

[0061] It should be noted that, under the action of the four-way valve, the heat pump system 70 can switch between cooling and heating modes.

[0062] like Figure 1 As shown, in the embodiment of the present invention, a water storage tank 80 and a fluid power component 81 are provided on the circulating water pipeline 8 , and the fluid power component 81 is located downstream of the water storage tank 80 .

[0063] In the above technical solution, when in summer mode, water enters the water storage tank 80 from the water inlet of the circulating water pipeline 8, and is cooled by the two heat pump systems 70 under the action of the fluid power component 81 to prepare cold water; when in winter mode, water enters the water storage tank 80 from the water inlet of the circulating water pipeline 8, and is heated by the two heat pump systems 70 under the action of the fluid power component 81 to prepare hot water. The water storage tank 80 is used to store cold water or hot water; the fluid power component 81 is a water storage pump, which can provide power for conveying cold water or hot water.

[0064] Specifically, in an embodiment of the present invention, the water outlet and the water inlet of the circulating water pipeline 8 are both connected to the fresh air unit pipeline. When in the summer mode, the temperature of the cooled water increases after heat exchange with the fresh air in the fresh air unit, and is cooled down by the two heat pump systems 70 before entering the fresh air unit again; when in the winter mode, the temperature of the heated water decreases after heat exchange with the fresh air in the fresh air unit, and is heated up by the two heat pump systems 70 to prepare hot water before entering the fresh air unit again.

[0065] In one embodiment, the water storage tank 80 may not be provided.

[0066] like Figure 1As shown, in an embodiment of the present invention, the cold and heat source device of the laboratory also includes: a first wind shell, the inlet of the first wind shell is used to allow return air to pass, and the outlet of the first wind shell is connected to the inlet of the first air duct of the solution regeneration part; a second wind shell, the inlet of the second wind shell is connected to the first wind shell, the inlet of the second wind shell is located between the inlet of the first wind shell and the outlet of the first wind shell, the second wind shell is provided with a first air valve 90, and the outlet of the second wind shell is connected to the ventilation channel of the heat exchange part 20.

[0067] In the above technical solution, in winter mode, if the concentration of the solution in the solution regeneration tower 10 does not need to be increased, the first air valve 90 is in an open state, and the return air enters the ventilation channel from the first air shell through the second air shell so that it can exchange heat with the fresh air through the heat exchange part 20. In this way, compared with the return air first entering the solution regeneration tower 10 and then entering the heat exchange part 20, the return air flow resistance can be reduced, thereby reducing energy consumption.

[0068] Specifically, in an embodiment of the present invention, in winter heating mode, if the concentration of the solution in the solution regeneration tower 10 needs to be increased, the first air valve 90 is in a closed state, and the return air first enters the solution regeneration tower 10 and then enters the heat exchange part 20.

[0069] Specifically, in the embodiment of the present invention, the first air valve 90 is a bypass valve. The specific structure of the bypass valve can refer to the prior art and will not be described in detail here.

[0070] Specifically, in an embodiment of the present invention, the cold and heat source device of the laboratory also includes an air duct shell, on which a second air valve 91 is provided, and the outlet of the air duct shell is located between the ventilation channel of the heat exchange part 20 and the second air duct of the spray tower 40. When the return air volume in the heat exchange part 20 is insufficient to remove the condensation heat of the heat pump system 70 in the summer mode, the second air valve 91 is opened to supplement fresh air to increase the heat exhaust air volume.

[0071] It should be noted that in the embodiments of the present invention, the solution dehumidification technology utilizes the property of certain salt solutions that can absorb and release moisture, and controls the temperature and humidity of the air by adjusting the temperature and humidity of the solution. In addition, the salt solution can also play a role in sterilization and disinfection.

[0072] It should be noted that in the embodiments of the present invention, the water spray tower serves as the first-stage heat dissipation cooling tower when preparing cold water, and as the first-stage heat source when preparing hot water; the solution spray tower serves as the second-stage heat dissipation cooling tower when preparing cold water, and as the second-stage heat source when preparing hot water.

[0073] It should be noted that in the embodiment of the present invention, in the summer mode, the solution regeneration tower 10 starts spraying and performs isenthalpic cooling treatment on the return air, wherein the second valve 16 is opened to reduce the spray concentration of the regeneration solution, which can improve the isenthalpic cooling effect, the third valve 13, the fourth valve 42 and the first valve 15 are closed, and the first air valve 90 is closed. The return air after cooling passes through the sensible heat recovery device, and the fresh air is precooled by the heat recovery medium, thereby improving the sensible heat recovery efficiency. The two heat pump systems 70 are in the cooling mode, and the return air after sensible heat recovery passes through the water spray tower and the solution spray tower in turn. The first heat exchanger 73 is used as a condenser, and the circulating water in the water spray tower is used as the cooling water of the corresponding first heat exchanger 73. The circulating solution in the solution spray tower is used as the cooling medium of the corresponding first heat exchanger 73, and the heat of the condensers in the two heat pump systems 70 is removed respectively. The use of the water spray tower can reduce the return air temperature rise and reduce the temperature of the air at the inlet of the solution spray tower, thereby reducing the condensation temperature of the heat pump system 70 corresponding to the solution spray tower and improving energy efficiency. The water pump draws water from the water storage tank 80 and passes through two second heat exchangers 75 (the second heat exchanger 75 is used as an evaporator) in sequence to achieve cascade utilization of cold capacity, and finally prepares cold water for use by the fresh air air conditioning unit or other occasions requiring a cold source. Among them, if the return air volume is not enough to remove the condensation heat of the heat pump system 70 in the summer mode, the second air valve 91 can be opened to supplement fresh air to increase the heat exhaust air volume. The connecting pipeline 5 between the solution regeneration tower 10 and the solution spray tower is used to maintain the balance of solution concentration and ensure the heat exhaust capacity of the solution spray tower.

[0074] It should be noted that in the embodiment of the present invention, in winter mode, the sensible heat recovery device also recovers sensible heat from the return air to preheat the fresh air. The two heat pump systems 70 are switched to the heating mode, the first heat exchanger 73 is used as an evaporator, the circulating water in the water spray tower is used as the heat source of the first heat exchanger 73, and the solution in the solution spray tower is used as the heat source of the first heat exchanger 73, and the return air is cooled in turn, wherein the solution is used as the terminal spray cooling without the risk of freezing. When the solution concentration in the solution spraying section becomes low, the solution freezing point rises, there is a risk of freezing, and the heating demand cannot be met, the first pump body 11 is started, the third valve 13 and the fourth valve 42 are opened, and the solution passes through the solution regeneration tower 10 and uses the return air for isenthalpic regeneration. If the regeneration amount is insufficient, the first valve 15 is opened, and the regenerated solution is sprayed after being heated by the heating element 12 to increase the regeneration amount. After regeneration, the solution transfers energy to the sensible heat recovery device through the return air, and transfers energy to the fresh air through the sensible heat recovery device to achieve the effect of returning heat, that is, energy loss can be avoided, and the moisture in the return air can be condensed and precipitated through the sensible heat recovery device and the water spray tower. The second heat exchanger 75 acts as a condenser, and the water storage pump draws water from the water storage tank 80 and passes through the two second heat exchangers 75 in turn to achieve step heating, and finally prepares hot water for use by the fresh air air conditioning unit or other occasions requiring a heat source. When there is no solution regeneration demand, the first air valve 90 is opened to reduce the running resistance of the wind system and save energy consumption.

[0075] In summary, the cold and heat source device of the laboratory in the embodiment of the present invention adds functional sections of regeneration solution spraying, water spraying and solution spraying on the basis of sensible heat recovery, thereby realizing full heat recovery of return air and significantly improving heat recovery efficiency; the energy in the return air can be used to efficiently prepare cold water or hot water, so that the fresh air treatment unit does not need to be equipped with additional cold and heat sources; and the solution spraying has a sterilization and disinfection effect on the return air, so that the exhaust air can meet the hygiene requirements.

[0076] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the ventilation channel of the heat exchange part recovers the sensible heat of the return air, and in the present application, a solution regeneration tower is arranged upstream of the heat exchange part, and by spraying the solution on the return air in the solution regeneration tower, the return air can be subjected to isenthalpic cooling treatment in the summer mode, which effectively improves the sensible heat recovery efficiency, thereby improving the energy utilization efficiency; at the same time, by arranging a heat pump system and a spray tower, and the heat pump system can transfer heat to the circulating water pipeline and the second pipeline, so that the return air can be used to prepare cold water and hot water according to seasonal needs, that is, it is possible to prepare cold water in summer and hot water in winter. When preparing cold water in summer, the spray tower is used as a cooling tower to discharge heat; when preparing hot water in winter, the spray tower can be used as a heat source tower. In this way, there is no need to set up additional external cold and heat sources, which not only greatly reduces the operating energy efficiency and energy consumption of the laboratory air-conditioning system, but also reduces the configuration requirements.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cold and hot source device for a laboratory, characterized in that: include: A solution regeneration unit comprises a solution regeneration tower (10) and a first pipeline (9), wherein the solution regeneration tower (10) has a first air duct, a spray end and a liquid outlet end, wherein the spray end is used to spray the solution into the first air duct, and the first pipeline (9) is used to connect the spray end and the liquid outlet end; A heat exchange part (20) is located on one side of the solution regeneration part, a ventilation channel is provided on the heat exchange part (20), and the heat exchange part (20) is configured to recover sensible heat from return air in the ventilation channel; at least one heat exchange section, located on a side of the heat exchange section (20) away from the solution regeneration section, the heat exchange section comprising a spray tower (40), a second pipeline (4) and a heat pump system (70), the spray tower (40) having a second air duct, a spray port and a liquid outlet, the spray port being used to spray a solution into the second air duct, the second pipeline (4) being used to connect the spray port and the liquid outlet, the first air duct, the ventilation channel and the second air duct being connected in sequence; The circulating water pipeline (8) has a water inlet and a water outlet, and the heat pump system (70) is used to transfer heat between the circulating water pipeline (8) and the second pipeline (4), so that the circulating water pipeline (8) has a winter mode for preparing hot water in winter and a summer mode for preparing cold water in summer.

2. The cold and hot source device for the laboratory according to claim 1, characterized in that: There are two heat exchange parts, the two second air ducts are connected, one of the second air ducts in the two heat exchange parts is connected to the ventilation channel, and a fan (50) is provided on the side of the other second air duct in the two heat exchange parts facing away from the heat exchange part (20).

3. The cold and hot source device for the laboratory according to claim 2, characterized in that: The spray tower (40) of the two heat exchange parts close to the heat exchange part (20) is provided with water, and the spray tower (40) of the two heat exchange parts far from the heat exchange part (20) is provided with a salt solution.

4. The cold and hot source device for a laboratory according to any one of claims 1 to 3, characterized in that: A heating element (12) is provided on the outer periphery of the first pipeline (9), and the heating element (12) is used to heat the solution in the first pipeline (9).

5. The cold and hot source device for the laboratory according to claim 4, characterized in that: The cold and hot source device of the laboratory further comprises a liquid supply pipeline (17) and a first valve (15) located on the liquid supply pipeline (17); the heating element (12) is located on the periphery of the liquid supply pipeline (17); the water inlet of the liquid supply pipeline (17) is connected to the water outlet of the circulating water pipeline (8); and the water outlet of the liquid supply pipeline (17) is connected to the water inlet of the circulating water pipeline (8).

6. The cold and hot source device for the laboratory according to claim 3, characterized in that: The cold and hot source device of the laboratory also includes a third pipeline (6), a first pump body (11) is provided on the first pipeline (9), an inlet of the third pipeline (6) is connected to an outlet of the first pump body (11), and an outlet of the third pipeline (6) is connected to the interior of the spray tower provided with the salt solution in one of the two spray towers.

7. The cold and hot source device for the laboratory according to claim 6, characterized in that: The cold and hot source device of the laboratory also includes a fourth pipeline (7), a second pump body (41) is provided on the second pipeline (4), the outlet of the second pump body (41) corresponding to the spray tower (40) provided with a salt solution is connected to the inlet of the fourth pipeline (7), and the outlet of the fourth pipeline (7) is connected to the interior of the solution regeneration tower (10).

8. The cold and hot source device for the laboratory according to claim 7, characterized in that: The fourth pipeline (7) and the third pipeline (6) are provided with heat exchange components (14).

9. The cold and hot source device for the laboratory according to claim 3, characterized in that: The cold and hot source device of the laboratory also includes a water inlet pipe and a connecting pipe (5), wherein a second valve (16) is provided on the water inlet pipe, the water inlet pipe is connected to the solution regeneration tower (10), one end of the connecting pipe (5) is connected to the solution regeneration tower (10), and the other end of the connecting pipe (5) is connected to the interior of the spray tower (40) provided with a salt solution among the two spray towers (40).

10. The cold and hot source device for a laboratory according to any one of claims 1 to 3, characterized in that: The heat pump system (70) comprises a heat exchange pipeline (76) and a compressor (71), a four-way valve (72), a first heat exchanger (73), a throttle valve (74) and a second heat exchanger (75) arranged on the heat exchange pipeline (76), wherein the first heat exchanger (73) is located on the periphery of the second pipeline (4), and the second heat exchanger (75) is located on the periphery of the circulating water pipeline (8).

11. The cold and hot source device for a laboratory according to any one of claims 1 to 3, characterized in that: The circulating water pipeline (8) is provided with a water storage tank (80) and a fluid power component (81), and the fluid power component (81) is located downstream of the water storage tank (80).

12. The cold and hot source device for a laboratory according to any one of claims 1 to 3, characterized in that: The cold and hot source device of the laboratory also includes: a first air housing, wherein an inlet of the first air housing is used for introducing return air, and an outlet of the first air housing is communicated with an inlet of a first air duct of the solution regeneration unit; A second wind shell, wherein the inlet of the second wind shell is connected to the first wind shell, the inlet of the second wind shell is located between the inlet of the first wind shell and the outlet of the first wind shell, the second wind shell is provided with a first air valve (90), and the outlet of the second wind shell is connected to the ventilation channel of the heat exchange part (20).

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