Cooling unit and control method thereof

Abstract

The invention discloses a cooling unit and a control method thereof.The cooling unit comprises a shell, an inner circulation air duct and an outer circulation air duct are formed in the shell, the inner circulation air duct and the outer circulation air duct are arranged in a crossed mode, and a heat exchange core is arranged at the crossed position; the internal circulation air duct comprises a first exhaust inlet and a first exhaust outlet, and a refrigerator is arranged in the internal circulation air duct; the outer circulation air channel comprises a second air suction opening, a second air exhaust opening and a bypass air opening, a spraying device is arranged in the outer circulation air channel, and the bypass air opening is provided with a condenser. Through cooperation of the heat exchange core body, the spraying device, the refrigerator and the condenser, switching of the dry mode, the wet mode and the mixed mode is achieved according to the temperature of the indoor side and the outdoor side, the indoor space can be rapidly cooled, and the refrigerating capacity and the annual energy efficiency of the cooling unit are improved. Moreover, in the dry mode and the wet mode, the refrigerator and the condenser can be bypassed, the system resistance is reduced, and the energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of cooling units, and in particular to a cooling unit and a control method thereof. Background Art

[0002] At present, indirect evaporative cooling units have received more and more attention and applications in recent years due to their extreme energy saving and high integration. With the increase in application scenarios and application requirements, the requirements for energy efficiency of cooling units are getting higher and higher. The cooling unit achieves cooling through air heat exchange on both sides of the air-to-air heat exchange core. Usually, a condenser is arranged between the air-to-air heat exchange core and the external circulation fan, and a refrigerator is arranged between the air-to-air heat exchange core and the internal circulation fan. The system wind resistance increases, the fan energy consumption is high, and the cooling unit energy efficiency is poor. Summary of the invention

[0003] The main purpose of the present application is to provide a cooling unit and a control method thereof to solve the problem of poor energy efficiency of traditional cooling units.

[0004] To achieve the above-mentioned purpose, the cooling unit proposed in the present application includes a shell, an inner circulation air duct and an outer circulation air duct are formed in the shell, the inner circulation air duct and the outer circulation air duct are arranged crosswise, and a heat exchange core is arranged at the intersection; the inner circulation air duct includes a first air suction port and a first air discharge port, and a refrigerator is arranged in the inner circulation air duct; the outer circulation air duct includes a second air suction port, a second air discharge port and a bypass air port, a spray device is arranged in the outer circulation air duct, and a condenser is arranged in the bypass air port;

[0005] The indoor air enters the internal circulation air duct from the first air inlet, and after heat exchange by the heat exchange core, is directly discharged to the indoor from the first air outlet or passes through the refrigerator and then discharged to the indoor from the first air outlet;

[0006] The outdoor wind enters the external circulation air duct from the second air inlet, and after heat exchange in the heat exchange core, is directly discharged to the outside from the second air outlet or is discharged to the outside from the bypass air outlet after passing through the condenser.

[0007] In addition, the present application also provides a control method for a cooling unit, the control method being applied to the cooling unit as described above, the control method comprising:

[0008] Obtain temperature information of the indoor and outdoor sides of the cooling unit;

[0009] Determine an operation mode of the cooling unit according to the temperature information of the indoor side and the outdoor side of the cooling unit and the target temperature, wherein the operation mode is one of a dry mode, a wet mode and a mixed mode;

[0010] The cooling unit is controlled to operate according to the operating mode.

[0011] In the technical solution of the present application, the inner circulation air duct and the outer circulation air duct are arranged crosswise, and a heat exchange core is arranged at the intersection of the inner circulation air duct and the outer circulation air duct. The inner circulation air duct includes a first air intake and a first air outlet, both of which are used to communicate with the indoor room, and the hot air flow in the room enters the cooling unit from the first air intake, and is discharged into the room from the first air outlet after being cooled by the cooling unit. The outer circulation air duct includes a second air intake, a second air outlet and a bypass vent, and the second air intake, the second air outlet and the bypass vent are all connected to the outdoor atmosphere, and the outdoor cold air flow enters the cooling unit from the second air intake, and is discharged from the second air outlet and the bypass vent after heat exchange in the cooling unit. The heat exchange core cools the indoor air by exchanging heat between the indoor hot air flow and the outdoor cold air flow. A spray device is provided in the outer circulation air duct, and the spray device is used to spray the airflow in the outer circulation air duct, so that the airflow temperature in the outer circulation air duct is lower, thereby improving the cooling efficiency of the cooling unit.

[0012] The operation mode of the cooling unit is determined according to the temperature information of the indoor and outdoor sides of the cooling unit and the target temperature. The operation mode is one of a dry mode, a wet mode and a mixed mode.

[0013] When the operation mode is dry mode, the spray device, refrigerator and condenser are turned off to allow the indoor wind to enter the inner circulation air duct from the first air intake port, and be discharged to the indoor from the first air outlet after heat exchange by the heat exchange core; the outdoor wind enters the outer circulation air duct from the second air intake port, and be discharged to the outdoors from the second air outlet and the bypass air outlet after heat exchange by the heat exchange core.

[0014] When the operation mode of the cooling unit is dry mode, the heat exchange between the internal circulation and external circulation airflows can meet the cooling demand through the heat exchange core, without opening the spray device, refrigerator and condenser. The indoor wind enters the internal circulation air duct from the first air intake port, and after heat exchange with the external circulation airflow through the heat exchange core, most of the airflow is directly discharged to the room from the first exhaust port, and a small part of the airflow passes through the refrigerator and then is discharged to the room from the first exhaust port. The outdoor wind enters the external circulation air duct from the second air intake port, and after heat exchange through the heat exchange core, most of the airflow is discharged to the outside from the second exhaust port with less resistance, and a small part of the airflow passes through the condenser and is discharged to the outside from the bypass vent.

[0015] When the operation mode is wet mode, the spray device is turned on and the refrigerator and condenser are turned off, so that the indoor wind enters the inner circulation air duct from the first air suction port, and is discharged to the indoor from the first air outlet after heat exchange by the heat exchange core; the outdoor wind enters the outer circulation air duct from the second air suction port, and is discharged to the outdoors from the second air outlet and the bypass air outlet after heat exchange by the heat exchange core and spraying by the spray device.

[0016] When the operation mode of the cooling unit is wet mode, the cooling demand can be met by the heat exchange core and the spray device without turning on the refrigerator and condenser. The indoor wind enters the inner circulation air duct from the first air intake port, and after heat exchange with the outer circulation air flow through the heat exchange core, most of the air flow is directly discharged to the room from the first air outlet, and a small part of the air flow passes through the refrigerator and then is discharged to the room from the first air outlet. The outdoor wind enters the outer circulation air duct from the second air intake port, exchanges heat through the heat exchange core, and the spray device sprays the outer circulation air duct to reduce the temperature of the air flow and the heat exchange core in the outer circulation air duct, thereby improving the cooling efficiency. Then most of the air flow is discharged to the outside from the second air outlet with less resistance, and a small part of the air flow passes through the condenser and is discharged to the outside from the bypass air outlet.

[0017] When the operation mode is the mixed mode, the spray device, refrigerator and condenser are turned on, so that the indoor wind enters the inner circulation air duct from the first air suction port, and after heat exchange through the heat exchange core, passes through the refrigerator and is discharged to the indoor from the first air outlet; the outdoor wind enters the outer circulation air duct from the second air suction port, and after heat exchange through the heat exchange core and spraying by the spray device, passes through the condenser and is discharged to the outdoors from the bypass air outlet.

[0018] When the operation mode of the cooling unit is the mixed mode, the heat exchange core, the spray device, the refrigerator and the condenser work together to meet the cooling demand. The indoor wind enters the inner circulation air duct from the first air intake port, and after the heat exchange core exchanges heat with the outer circulation airflow, the refrigerator supplements the cooling of the airflow to reduce the temperature of the airflow. All airflows flow through the refrigerator and are then discharged to the room from the first exhaust port. The outdoor wind enters the outer circulation air duct from the second air intake port, exchanges heat with the heat exchange core, and the spray device sprays the outer circulation air duct to reduce the temperature of the airflow in the outer circulation air duct and the heat exchange core, thereby improving the cooling efficiency. The condenser discharges the heat in the inner circulation airflow, and all airflows flow through the condenser and are then discharged to the outside from the bypass vent.

[0019] The present application realizes the switching of dry mode, wet mode and mixed mode according to the temperature of indoor and outdoor sides by setting up the heat exchange core, spray device, refrigerator and condenser, so that the indoor can be cooled quickly, and the cooling capacity and energy efficiency of the cooling unit are improved throughout the year. In addition, in dry mode and wet mode, the refrigerator and condenser can be bypassed to reduce system resistance and energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the structure of a cooling unit in the first embodiment of the present application;

[0022] Figure 2 This is a structural schematic diagram of the cooling unit operating in dry mode or wet mode in the first embodiment of the present application;

[0023] Figure 3 This is a structural schematic diagram of the mixed operation mode of the cooling unit in the first embodiment of the present application;

[0024] Figure 4 This is a schematic structural diagram of the first air intake port and the first air discharge port on the same side of the cooling unit in the first embodiment of the present application;

[0025] Figure 5 This is a schematic structural diagram of the first air intake and the first air discharge in the cooling unit of the first embodiment of the present application on opposite sides;

[0026] Figure 6 This is a structural schematic diagram of the cooling unit operating in dry mode or wet mode in the second embodiment of the present application;

[0027] Figure 7 This is a structural schematic diagram of the mixed operation mode of the cooling unit in the second embodiment of the present application;

[0028] Figure 8 This is a schematic structural diagram of the first air intake port and the first air discharge port on the same side of the cooling unit in the second embodiment of the present application;

[0029] Fig. 9 This is a schematic structural diagram of the first air intake port and the first air discharge port on the opposite sides of the cooling unit in the second embodiment of the present application;

[0030] Fig.10 This is a schematic diagram of the structure of a cooling unit in the third embodiment of the present application;

[0031] Fig.11 The figure is a flow chart of a control method of a cooling unit according to an embodiment of the present application.

[0032] Description of Figure Numbers:

[0033]

[0034]

[0035] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0041] The present application provides a cooling unit and a control method thereof.

[0042] Figures 2 to 10 The dashed line in the middle indicates the direction of air flow.

[0043] In the first embodiment, if Figures 1 to 3As shown, the cooling unit 100 includes a shell 10, an inner circulation air duct and an outer circulation air duct are formed in the shell 10, the inner circulation air duct and the outer circulation air duct are arranged crosswise, and a heat exchange core 20 is arranged at the intersection; the inner circulation air duct includes a first air suction port 111 and a first air discharge port 122, and a refrigerator 30 is arranged in the inner circulation air duct; the outer circulation air duct includes a second air suction port 112, a second air discharge port 132 and a bypass air port 133, a spray device 50 is arranged in the outer circulation air duct, and the bypass air port 133 is provided with a condenser 60; the indoor wind enters the inner circulation air duct from the first air intake port 111, and after heat exchange through the heat exchange core 20, is directly discharged to the indoor through the first air outlet 122 or is discharged to the indoor through the first air outlet 122 after passing through the refrigerator 30; the outdoor wind enters the outer circulation air duct from the second air intake port 112, and after heat exchange through the heat exchange core 20, is directly discharged to the outdoors through the second air outlet 132 or is discharged to the outdoors through the bypass air outlet 133 after passing through the condenser 60.

[0044] The inner circulation air duct and the outer circulation air duct are arranged crosswise, and a heat exchange core 20 is arranged at the intersection of the inner circulation air duct and the outer circulation air duct. The inner circulation air duct includes a first air inlet 111 and a first air outlet 122, both of which are used to communicate with the indoor room, and the hot air flow in the room enters the cooling unit 100 from the first air inlet 111, and is discharged into the room from the first air outlet 122 after being cooled by the cooling unit 100. The outer circulation air duct includes a second air inlet 112, a second air outlet 132 and a bypass vent 133, and the second air inlet 112, the second air outlet 132 and the bypass vent 133 are all connected to the outdoor atmosphere, and the outdoor cold air flow enters the cooling unit 100 from the second air inlet 112, and is discharged to the outdoors from the second air outlet 132 and the bypass vent 133 after heat exchange in the cooling unit 100. The heat exchange core 20 cools the indoor air by exchanging heat between the indoor hot air flow and the outdoor cold air flow. A spray device 50 is provided in the external circulation air duct, and the spray device 50 is used to spray the air flow in the external circulation air duct, so that the air flow temperature in the external circulation air duct is lower, thereby improving the cooling efficiency of the cooling unit 100.

[0045] The operation mode of the cooling unit 100 is determined according to the temperature information of the indoor side and the outdoor side of the cooling unit 100 and the target temperature. The operation mode is one of a dry mode, a wet mode and a mixed mode.

[0046] Please refer to Figure 2 , Figure 2The middle dotted line indicates the direction of air flow. When the operation mode is the dry mode, the spray device 50, the refrigerator 30 and the condenser 60 are turned off, so that the indoor wind enters the inner circulation air duct from the first air inlet 111, and is discharged to the indoor through the first air outlet 122 after heat exchange through the heat exchange core 20; the outdoor wind enters the outer circulation air duct from the second air inlet 112, and is discharged to the outdoor through the second air outlet 132 and the bypass air outlet 133 after heat exchange through the heat exchange core 20.

[0047] When the operation mode of the cooling unit 100 is the dry mode, the heat exchange between the internal circulation and external circulation airflows can meet the cooling demand through the heat exchange core 20, without opening the spray device 50, the refrigerator 30 and the condenser 60. The indoor wind enters the internal circulation air duct from the first air inlet 111, and after heat exchange with the external circulation airflow through the heat exchange core 20, most of the airflow is directly discharged to the room from the first air outlet 122, and a small part of the airflow passes through the refrigerator 30 and then is discharged to the room from the first air outlet 122. The outdoor wind enters the external circulation air duct from the second air inlet 112, and after heat exchange through the heat exchange core 20, most of the airflow is discharged to the outside from the second air outlet 132 with less resistance, and a small part of the airflow passes through the condenser 60 and is discharged to the outside from the bypass air outlet 133.

[0048] Please refer to Figure 2 , Figure 2 The middle dotted line indicates the direction of air flow. When the operation mode is the wet mode, the spray device 50 is turned on and the refrigerator 30 and the condenser 60 are turned off, so that the indoor wind enters the inner circulation air duct from the first air inlet 111, and is discharged to the indoor through the first air outlet 122 after heat exchange by the heat exchange core 20; the outdoor wind enters the outer circulation air duct from the second air inlet 112, and is discharged to the outdoor through the second air outlet 132 and the bypass air outlet 133 after heat exchange by the heat exchange core 20 and spraying by the spray device 50.

[0049] When the operation mode of the cooling unit 100 is the wet mode, the cooling demand can be met by the heat exchange core 20 and the spray device 50, without turning on the refrigerator 30 and the condenser 60. The indoor wind enters the inner circulation air duct from the first air inlet 111, and after heat exchange with the outer circulation airflow through the heat exchange core 20, most of the airflow is directly discharged to the room from the first air outlet 122, and a small part of the airflow passes through the refrigerator 30 and then is discharged to the room from the first air outlet 122. The outdoor wind enters the outer circulation air duct from the second air inlet 112, exchanges heat through the heat exchange core 20, and the spray device 50 sprays the outer circulation air duct to reduce the temperature of the airflow in the outer circulation air duct and the heat exchange core 20, thereby improving the cooling efficiency. Then, most of the airflow is discharged to the outside from the second air outlet 132 with less resistance, and a small part of the airflow passes through the condenser 60 and is discharged to the outside from the bypass air outlet 133.

[0050] Please refer to Figure 3, Figure 3 The dotted line in the middle indicates the direction of air flow. When the operation mode is the mixed mode, the spray device 50, the refrigerator 30 and the condenser 60 are turned on, so that the indoor wind enters the inner circulation air duct from the first air inlet 111, and after heat exchange through the heat exchange core 20, passes through the refrigerator 30 and is discharged to the indoor through the first air outlet 122; the outdoor wind enters the outer circulation air duct from the second air inlet 112, and after heat exchange through the heat exchange core 20 and spraying by the spray device 50, passes through the condenser 60 and is discharged to the outdoors through the bypass air outlet 133.

[0051] When the operation mode of the cooling unit 100 is a mixed mode, the cooling demand is met by the combined action of the heat exchange core 20, the spray device 50, the refrigerator 30 and the condenser 60. The indoor wind enters the inner circulation air duct from the first air inlet 111, and after heat exchange with the outer circulation airflow through the heat exchange core 20, the refrigerator 30 supplements the cooling of the airflow to reduce the temperature of the airflow. All airflows flow through the refrigerator 30 and are then discharged to the room from the first exhaust port 122. The outdoor wind enters the outer circulation air duct from the second air inlet 112, and heat exchanges through the heat exchange core 20. In addition, the spray device 50 sprays the outer circulation air duct to reduce the temperature of the airflow in the outer circulation air duct and the heat exchange core 20, thereby improving the cooling efficiency. The condenser 60 discharges the heat in the inner circulation airflow. All airflows flow through the condenser 60 and are then discharged to the outside from the bypass vent 133.

[0052] The present application realizes the switching of dry mode, wet mode and mixed mode according to the temperature of the indoor and outdoor sides by setting the heat exchange core 20, the spray device 50, the refrigerator 30 and the condenser 60, so that the indoor can be cooled quickly, and the refrigeration capacity and the energy efficiency of the cooling unit 100 are improved throughout the year. In addition, in the dry mode and the wet mode, the refrigerator 30 and the condenser 60 can be bypassed to reduce the system resistance and reduce the energy consumption.

[0053] In some feasible embodiments, the refrigerator 30 may be an evaporator or a surface cooler, and the cooling unit 100 further includes a compressor 70 to realize the circulation of the refrigerant. The bypass vent 133 is provided with a second bypass valve 135, and the second exhaust vent 132 is provided with an external circulation exhaust valve 134. When the cooling unit 100 operates in dry mode or wet mode, the external circulation exhaust valve 134 and the second bypass valve 135 are both opened, and most of the airflow is discharged to the outside from the second exhaust vent 132 with less resistance, and a small part of the airflow is discharged to the outside from the bypass vent 133 after passing through the condenser 60. When the cooling unit 100 operates in a mixed mode, the external circulation exhaust valve 134 is closed, the second bypass valve 135 is opened, and all airflows flow through the condenser 60 and are then discharged to the outside from the bypass vent 133.

[0054] In the first embodiment, please refer to Figure 2 and Figure 3 , Figure 2 and Figure 3 The middle dotted line is the direction of air flow. The housing 10 includes a first chamber 11, a second chamber 12 and a third chamber 13. A heat exchange core 20 is disposed in the first chamber 11. The first chamber 11 is formed with a first air inlet 111 and a second air inlet 112. The first chamber 11 is connected to the second chamber 12 and an internal circulation fan 121 is disposed at the connection point. The first chamber 11 and the second chamber 12 form an internal circulation air duct, and a first exhaust port 122 is provided on the cavity wall of the second chamber 12. The first chamber 11 is connected to the third chamber 13 and an external circulation fan 131 is disposed at the connection point. The first chamber 11 and the third chamber 13 form an external circulation air duct, and a second exhaust port 132 and a bypass air port 133 are provided on the cavity wall of the third chamber 13.

[0055] The heat exchange core 20 is arranged in the first chamber 11, and the first chamber 11 is located between the second chamber 12 and the third chamber 13. The first chamber 11 is formed with a first air suction port 111 and a second air suction port 112. The first air suction port 111 is connected to the indoor environment, and the second air suction port 112 is connected to the outdoor atmosphere.

[0056] The second chamber 12 is connected to the first chamber 11, and the second chamber 12 is located below the first chamber 11. An internal circulation fan 121 is provided at the connection between the second chamber 12 and the first chamber 11. The cooling unit 100 forms an internal circulation air duct through the first chamber 11 and the second chamber 12. A first exhaust port 122 is provided on the cavity wall of the second chamber 12. The first exhaust port 122 is used to discharge the cooled airflow into the room. The internal circulation fan 121 is used to provide power, draw the hot air flow in the room into the internal circulation, and send the cooled airflow into the room to realize the internal circulation.

[0057] The first air inlet 111 can be selected to be on the same side or on the opposite side as the first air outlet 122 according to the installation scenario. Figure 4 The first air intake port 111 and the first air exhaust port 122 are on the same side. Figure 5 The first air intake port 111 and the first air exhaust port 122 are on different sides.

[0058] The third chamber 13 is connected to the first chamber 11, and the third chamber 13 is located above the first chamber 11. An external circulation fan 131 is provided at the connection between the third chamber 13 and the first chamber 11. The cooling unit 100 forms an external circulation air duct through the first chamber 11 and the third chamber 13. A second exhaust port 132 and a bypass vent 133 are provided on the cavity wall of the third chamber 13. The second exhaust port 132 and the bypass vent 133 are used to discharge the airflow after heat exchange to the outside. The external circulation fan 131 is used to provide power, draw the outdoor cold airflow into the external circulation, and discharge the airflow after heat exchange to the outside to realize the external circulation.

[0059] The condenser 60 is located in the third chamber 13. After the condenser 60 is arranged on the external circulation fan 131, the condenser 60 is bypassed in the dry mode and the wet mode, which reduces the system resistance and the energy consumption of the external circulation fan 131. In addition, the corrosion of the condenser 60 by the spray water of the spray device 50 is avoided, and the reliability of the condenser 60 is improved. The condenser 60 is located in the third chamber 13 and at the top of the cooling unit 100, which is convenient for cleaning and replacement of the condenser 60 and convenient for maintenance of the condenser 60.

[0060] In the first embodiment, please refer to Figure 2 and Figure 3 , Figure 2 and Figure 3 The middle dotted line is the direction of air flow. A first bypass valve 123 is provided in the second chamber 12, and the refrigerator 30 is located in the second chamber 12; the air on the indoor side enters the internal circulation air duct from the first air inlet 111, and after heat exchange in the heat exchange core 20, passes through the first bypass valve 123 and is discharged to the indoor from the first air outlet 122, or passes through the refrigerator 30 and then is discharged to the indoor from the first air outlet 122.

[0061] The first bypass valve 123 is located in the second chamber 12 , and the refrigerator 30 is also located in the second chamber 12 .

[0062] Please refer to Figure 2 , Figure 2 The middle dotted line is the direction of air flow. When the operation mode of the cooling unit 100 is dry mode or wet mode, the first bypass valve 123 is opened, and the air on the indoor side enters the internal circulation air duct from the first air inlet 111. After heat exchange through the heat exchange core 20, the centrifugal action of the internal circulation fan 121 provides air circulation power. Since the first bypass valve 123 is opened to generate a flow resistance difference, most of the air flow passes through the first bypass valve 123 with smaller resistance and is discharged into the room from the first exhaust port 122. A small part of the air flow passes through the refrigerator 30 with larger resistance and is discharged into the room from the first exhaust port 122.

[0063] Please refer to Figure 3 , Figure 3 The dotted line in the middle indicates the direction of air flow. When the operation mode of the cooling unit 100 is the mixed mode, the first bypass valve 123 is closed, and the air on the indoor side enters the internal circulation air duct from the first air inlet 111, and after heat exchange through the heat exchange core 20, all the air flows through the refrigerator 30 and then is discharged to the indoor through the first air outlet 122.

[0064] In this embodiment, the first bypass valve 123 is provided to bypass the refrigerator 30 when operating in the dry mode and the wet mode, thereby reducing the system resistance and the energy consumption of the internal circulation fan 121.

[0065] In the second embodiment, please refer to Figure 6 and Figure 7 , Figure 6 and Figure 7 The middle dotted line is the direction of air flow. The heat exchange core 20 includes a first air inlet 21 connected to the first air inlet 111 and a first air outlet 22 connected to the internal circulation fan 121, and the refrigerator 30 is movably arranged at the first air outlet 22; the cooling unit 100 also includes a driving device 40, the output end of the driving device 40 is connected to the refrigerator 30, and the driving device 40 is used to drive the refrigerator 30 to separate from or fit with the first air outlet 22.

[0066] The heat exchange core 20 includes a first air inlet 111 and a first air outlet 22. The first air inlet 111 is connected to the first air inlet 21, and the first air outlet 22 is connected to the internal circulation fan 121. The refrigerator 30 is movably arranged at the first air outlet 22. The refrigerator 30 is connected to the output end of the driving device 40. The driving device 40 is used to drive the refrigerator 30 to separate from or attach to the first air outlet 22.

[0067] Please refer to Figure 6 , Figure 6 The middle dotted line is the direction of air flow. Before the cooling unit 100 is started, the refrigerator 30 is in a state of being separated from the first air outlet 22 under the control of the driving device 40. When the operation mode of the cooling unit 100 is dry mode or wet mode, the refrigerator 30 still remains separated from the first air outlet 22, and the wind on the indoor side enters the internal circulation air duct from the first air intake port 111, and enters the heat exchange core 20 from the first air intake port 111. After heat exchange in the heat exchange core 20, the air flow does not flow through the refrigerator 30. The centrifugal action of the internal circulation fan 121 provides air circulation power. All air flows through the first air outlet 22 and then are directly discharged to the room from the first exhaust port 122, reducing the internal circulation wind resistance and improving the energy efficiency of the cooling unit 100 throughout the year.

[0068] Please refer to Figure 7 , Figure 7 The dotted line in the middle indicates the direction of air flow. When the operation mode of the cooling unit 100 is the mixed mode, the driving device 40 drives the refrigerator 30 to move, and the refrigerator 30 is in contact with the first air outlet 22. The air on the indoor side enters the inner circulation air duct from the first air inlet 111, and enters the heat exchange core 20 from the first air inlet 111. After heat exchange in the heat exchange core 20, all the air flows through the refrigerator 30 at the first air outlet 22 for cooling and then are discharged to the indoor through the first air outlet 122.

[0069] In this embodiment, a driving device 40 is provided to drive the refrigerator 30 to be separated from the first air outlet 22, so that the refrigerator 30 is bypassed when operating in the dry mode and the wet mode, thereby reducing system resistance and reducing the energy consumption of the internal circulation fan 121.

[0070] In some feasible embodiments, the driving device 40 can drive the refrigerator 30 to slide or rotate to separate or fit the refrigerator 30 and the first air outlet 22. Figure 6 and Figure 7 , the driving device 40 drives the refrigerator 30 to rotate to separate or fit the refrigerator 30 and the first air outlet 22, Figure 6 is a schematic diagram of a state in which the refrigerator 30 is separated from the first air outlet 22, Figure 7 It is a schematic diagram of the state when the refrigerator 30 is attached to the first air outlet 22 .

[0071] In this embodiment, the first air inlet 111 can be selected to be on the same side or on the opposite side as the first air outlet 122 according to the installation scenario. Figure 8 The first air intake port 111 and the first air exhaust port 122 are on the same side. Fig. 9 The first air intake port 111 and the first air exhaust port 122 are on different sides.

[0072] In the first embodiment, please refer to Figure 2 , Figure 2 The middle dotted line is the direction of air flow. The first air inlet 21 is provided with an internal circulation filter 211, which filters impurities and dust in the air flow inside the room, thereby improving the indoor air freshness, preventing impurities and dust from damaging the heat exchange core 20, and extending the service life of the cooling unit 100.

[0073] In the first embodiment, please refer to Figure 2 , Figure 2 The middle dotted line is the direction of air flow. The second air inlet 112 is provided with an external circulation filter 113, which filters impurities and dust in the air flow outside the room to prevent impurities and dust from damaging the heat exchange core 20, extend the service life of the cooling unit 100, and improve the stability and reliability of the cooling unit 100.

[0074] In the first embodiment, please refer to Figure 2 , Figure 2 The middle dashed line is the airflow direction. The spray device 50 includes a mist precooler 51 , which is disposed at the second air inlet 112 and sprays toward the direction close to the heat exchange core 20 .

[0075] The second air inlet 112 is provided with a mist precooler 51. The outdoor airflow enters the external circulation air duct from the second air inlet 112. The mist precooler 51 precools the outdoor airflow, reduces the temperature of the outdoor airflow, and improves the heat exchange efficiency. In addition, the mist precooler 51 uses a nozzle with a smaller opening to spray droplets of micro-particle size. The mist precooler 51 sprays the precooled airflow in the direction close to the heat exchange core 20. The spray direction of the nozzle of the mist precooler 51 is consistent with the direction of airflow movement, which speeds up the efficiency of airflow circulation, thereby reducing the energy consumption of the external circulation fan 131 and improving the cooling efficiency of the cooling unit 100.

[0076] In the first embodiment, please refer to Figure 2 , Figure 2 The middle dotted line is the airflow direction. The heat exchange core 20 further includes a second air inlet 23 connected to the second air inlet 112 and a second air outlet 24 connected to the second air outlet 132 and the bypass air outlet 133. The mist precooler 51 sprays in the direction close to the second air inlet 23. The spray device 50 further includes a sprayer 52, which sprays in the direction close to the second air outlet 24.

[0077] The heat exchange core 20 also includes a second air inlet 23 and a second air outlet 24. The second air inlet 23 is connected to the second air intake 112. The second air outlet 24 is connected to the second air outlet 132 and the bypass air outlet 133. In some feasible embodiments, the second air outlet 24 is connected to the external circulation fan 131. The mist precooler 51 sprays in the direction close to the second air inlet 23. The spray direction of the mist precooler 51 is consistent with the direction of air flow movement, which speeds up the efficiency of air flow circulation. The sprayer 52 is arranged between the second air outlet 24 and the external circulation fan 131. The sprayer 52 sprays in the direction close to the second air outlet 24. The spray direction of the sprayer 52 is opposite to the direction of air flow movement. The sprayer is used to cool the heat exchange core 20 and the air flow in the heat exchange core 20 to improve the cooling efficiency.

[0078] The spray device 50 further includes a spray water pump 55 to circulate the spray water so that the spray device 50 can continuously spray water.

[0079] In the first embodiment, please refer to Figure 2 , Figure 2 The middle dashed line is the direction of air flow. The spray device 50 also includes a water collector 53, which is arranged corresponding to the spray device 52. The water collector 53 is used to prevent droplets from being blown out of the cooling unit 100 under the action of the external circulation fan 131, thereby reducing the water consumption of the cooling unit 100, effectively preventing the water blowing phenomenon, making the use of the cooling unit 100 more convenient, and improving the stability and reliability of the cooling unit 100.

[0080] In the third embodiment, please refer to Fig.10 , Fig.10 The middle dashed line is the direction of air flow. The spray device 50 further includes a sprayer 54 disposed between the second air suction port 112 and the second air inlet 23 , and the sprayer 54 sprays in a direction close to the second air inlet 23 .

[0081] The sprayer 54 is located between the second air inlet 112 and the second air inlet 23. The sprayer 54 sprays in the direction close to the second air inlet 23. The spraying direction of the sprayer 54 is consistent with the movement direction of the airflow, which speeds up the efficiency of the airflow circulation, thereby reducing the energy consumption of the external circulation fan 131. The sprayer 54 is set to cool the heat exchange core 20 in a bottom spray downstream manner to improve the cooling efficiency of the cooling unit 100. The sprayer 54 uses a nozzle with a slightly larger opening to spray droplets of fine particle size to cool the airflow entering the heat exchange core 20. The droplets are fully evaporated in the heat exchange core 20 under the action of the airflow. The sprayer 54 is set to improve the energy efficiency of the wet mode of the cooling unit 100.

[0082] In addition, please refer to Fig.11 The present application also provides a control method for a cooling unit 100. The control method is applied to the cooling unit 100 as described above. The specific structure of the cooling unit 100 refers to the above embodiment. Since the control method adopts all the technical solutions of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be described one by one here.

[0083] Control methods include:

[0084] Step S10, obtaining temperature information of the indoor and outdoor sides of the cooling unit;

[0085] The temperature information of the indoor side and the temperature information of the outdoor side of the cooling unit 100 are obtained by setting sensors.

[0086] Step S20, determining an operation mode of the cooling unit according to the temperature information of the indoor side and the outdoor side of the cooling unit and the target temperature, wherein the operation mode is one of a dry mode, a wet mode and a mixed mode;

[0087] The operating mode of the cooling unit 100 is determined by comprehensively considering the indoor temperature information, outdoor temperature information and target temperature of the cooling unit 100, thereby reducing the energy consumption of the cooling unit 100 and improving the cooling capacity and annual energy efficiency of the cooling unit 100.

[0088] Step S30, controlling the cooling unit to operate according to the operating mode.

[0089] In one embodiment, step S30, the step of controlling the cooling unit to operate according to the operating mode includes:

[0090] Step S31, when the operation mode is the dry mode, the spray device, the refrigerator and the condenser are turned off, so that the indoor wind enters the inner circulation air duct from the first air inlet, and is discharged to the indoor from the first air outlet after heat exchange by the heat exchange core; the outdoor wind enters the outer circulation air duct from the second air inlet, and is discharged to the outdoor from the second air outlet and the bypass air outlet after heat exchange by the heat exchange core;

[0091] When the operation mode of the cooling unit 100 is the dry mode, the heat exchange between the internal circulation and external circulation airflows can meet the cooling demand through the heat exchange core 20, without opening the spray device 50, the refrigerator 30 and the condenser 60. The indoor wind enters the internal circulation air duct from the first air inlet 111, and after heat exchange with the external circulation airflow through the heat exchange core 20, most of the airflow is directly discharged to the room from the first air outlet 122, and a small part of the airflow passes through the refrigerator 30 and then is discharged to the room from the first air outlet 122. The outdoor wind enters the external circulation air duct from the second air inlet 112, and after heat exchange through the heat exchange core 20, most of the airflow is discharged to the outside from the second air outlet 132 with less resistance, and a small part of the airflow passes through the condenser 60 and is discharged to the outside from the bypass air outlet 133.

[0092] In some feasible embodiments, the refrigerator 30 can be bypassed by opening the first bypass valve 123, or the refrigerator 30 can be driven by the driving device 40 to separate from the first air outlet 22 of the heat exchange core 20, so as to bypass the refrigerator 30, reduce the internal circulation wind resistance, and improve the energy efficiency of the cooling unit 100 throughout the year.

[0093] Step S32, when the operation mode is the wet mode, the spray device is turned on and the refrigerator and the condenser are turned off, so that the indoor wind enters the inner circulation air duct from the first air inlet, and is discharged to the indoor from the first air outlet after heat exchange by the heat exchange core; the outdoor wind enters the outer circulation air duct from the second air inlet, and is discharged to the outdoor from the second air outlet and the bypass air outlet after heat exchange by the heat exchange core and spraying by the spray device;

[0094] When the operation mode of the cooling unit 100 is the wet mode, the cooling demand can be met by the heat exchange core 20 and the spray device 50, without turning on the refrigerator 30 and the condenser 60. The indoor wind enters the inner circulation air duct from the first air inlet 111, and after heat exchange with the outer circulation airflow through the heat exchange core 20, most of the airflow is directly discharged to the room from the first air outlet 122, and a small part of the airflow passes through the refrigerator 30 and then is discharged to the room from the first air outlet 122. The outdoor wind enters the outer circulation air duct from the second air inlet 112, exchanges heat through the heat exchange core 20, and the spray device 50 sprays the outer circulation air duct to reduce the temperature of the airflow in the outer circulation air duct and the heat exchange core 20, thereby improving the cooling efficiency. Then, most of the airflow is discharged to the outside from the second air outlet 132 with less resistance, and a small part of the airflow passes through the condenser 60 and is discharged to the outside from the bypass air outlet 133.

[0095] Step S33, when the operating mode is the mixed mode, turn on the spray device, the refrigerator and the condenser, so that the indoor wind enters the inner circulation air duct from the first air suction port, and after heat exchange through the heat exchange core, passes through the refrigerator and is discharged to the indoor from the first air outlet; the outdoor wind enters the outer circulation air duct from the second air suction port, and after heat exchange through the heat exchange core and spraying by the spray device, passes through the condenser and is discharged to the outdoors from the bypass air outlet.

[0096] When the operation mode of the cooling unit 100 is a mixed mode, the cooling demand is met by the combined action of the heat exchange core 20, the spray device 50, the refrigerator 30 and the condenser 60. The indoor wind enters the inner circulation air duct from the first air inlet 111, and after heat exchange with the outer circulation airflow through the heat exchange core 20, the refrigerator 30 supplements the cooling of the airflow to reduce the temperature of the airflow. All airflows flow through the refrigerator 30 and are then discharged to the room from the first exhaust port 122. The outdoor wind enters the outer circulation air duct from the second air inlet 112, and heat exchanges through the heat exchange core 20. In addition, the spray device 50 sprays the outer circulation air duct to reduce the temperature of the airflow in the outer circulation air duct and the heat exchange core 20, thereby improving the cooling efficiency. The condenser 60 discharges the heat in the inner circulation airflow. All airflows flow through the condenser 60 and are then discharged to the outside from the bypass vent 133.

[0097] In some feasible embodiments, the first bypass valve 123 can be closed, or the driving device 40 can drive the refrigerator 30 to fit the first air outlet 22 of the heat exchange core 20, so that all air flows through the refrigerator 30 and then is discharged into the room from the first air outlet 122.

[0098] The cooling unit can choose to operate in dry mode, wet mode or mixed mode according to different needs, so that the airflow can choose different paths according to different modes to meet the user's cooling needs and improve the cooling efficiency of the cooling unit.

[0099] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made based on the concept of the present application and the contents of the present application specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A cooling unit, characterized in that: The cooling unit comprises a shell, an inner circulation air duct and an outer circulation air duct are formed in the shell, the inner circulation air duct and the outer circulation air duct are arranged crosswise, and a heat exchange core is arranged at the intersection; the inner circulation air duct comprises a first air suction port and a first air discharge port, and a refrigerator is arranged in the inner circulation air duct; the outer circulation air duct comprises a second air suction port, a second air discharge port and a bypass air port, a spray device is arranged in the outer circulation air duct, and a condenser is arranged in the bypass air port; The indoor air enters the internal circulation air duct from the first air inlet, and after heat exchange by the heat exchange core, is directly discharged to the indoor from the first air outlet or passes through the refrigerator and then discharged to the indoor from the first air outlet; The outdoor wind enters the external circulation air duct from the second air inlet, and after heat exchange in the heat exchange core, is directly discharged to the outside from the second air outlet or is discharged to the outside from the bypass air outlet after passing through the condenser.

2. The cooling unit according to claim 1, characterized in that: The shell includes a first chamber, a second chamber and a third chamber, the heat exchange core is arranged in the first chamber, and the first chamber is formed with the first air suction port and the second air suction port; the first chamber is connected with the second chamber, and an internal circulation fan is arranged at the connecting point, the first chamber and the second chamber form the internal circulation air duct, and the first exhaust port is opened on the cavity wall of the second chamber; the first chamber is connected with the third chamber, and an external circulation fan is arranged at the connecting point, the first chamber and the third chamber form the external circulation air duct, and the second exhaust port and the bypass air port are opened on the cavity wall of the third chamber.

3. The cooling unit according to claim 2, characterized in that: A first bypass valve is disposed in the second chamber, and the refrigerator is located in the second chamber; The indoor wind enters the internal circulation air duct from the first air inlet, and after heat exchange by the heat exchange core, passes through the first bypass valve and is discharged into the room from the first air outlet or passes through the refrigerator and is discharged into the room from the first air outlet.

4. The cooling unit according to claim 2, characterized in that: The heat exchange core includes a first air inlet connected to the first air intake port and a first air outlet connected to the internal circulation fan, and the refrigerator can be movably arranged at the first air outlet; the cooling unit also includes a driving device, an output end of the driving device is connected to the refrigerator, and the driving device is used to drive the refrigerator to separate from or fit with the first air outlet.

5. The cooling unit according to claim 4, characterized in that: The first air inlet is provided with an internal circulation filter; and / or, The second air suction port is provided with an external circulation filter.

6. The cooling unit according to any one of claims 1 to 5, characterized in that: The spray device comprises a micro-mist pre-cooler, which is arranged at the second air inlet and sprays in a direction close to the heat exchange core.

7. The cooling unit according to claim 6, characterized in that: The heat exchange core also includes a second air inlet connected to the second air intake port and a second air outlet connected to the second air outlet and the bypass air outlet, and the mist precooler sprays in a direction close to the second air inlet; the spray device also includes a sprayer, and the sprayer sprays in a direction close to the second air outlet.

8. The cooling unit according to claim 7, characterized in that: The spray device also includes a water collector, and the water collector is arranged corresponding to the sprayer.

9. The cooling unit according to claim 7, characterized in that: The spray device also includes a sprayer disposed between the second air suction port and the second air inlet, and the sprayer sprays in a direction close to the second air inlet.

10. A method for controlling a cooling unit, characterized in that: The control method is applied to the cooling unit according to any one of claims 1 to 9, and the control method comprises: Obtain temperature information of the indoor and outdoor sides of the cooling unit; Determine an operation mode of the cooling unit according to the temperature information of the indoor side and the outdoor side of the cooling unit and the target temperature, wherein the operation mode is one of a dry mode, a wet mode and a mixed mode; The cooling unit is controlled to operate according to the operating mode.

11. The control method of a cooling unit according to claim 10, characterized in that: The step of controlling the cooling unit to operate according to the operating mode comprises: When the operation mode is the dry mode, the spray device, the refrigerator and the condenser are turned off, so that the indoor wind enters the inner circulation air duct from the first air inlet, and is discharged to the indoor from the first air outlet after heat exchange by the heat exchange core; the outdoor wind enters the outer circulation air duct from the second air inlet, and is discharged to the outdoor from the second air outlet and the bypass air outlet after heat exchange by the heat exchange core; When the operation mode is the wet mode, the spray device is turned on and the refrigerator and the condenser are turned off, so that the indoor wind enters the inner circulation air duct from the first air suction port, and is discharged to the indoor from the first air outlet after heat exchange by the heat exchange core; the outdoor wind enters the outer circulation air duct from the second air suction port, and is discharged to the outdoor from the second air outlet and the bypass air outlet after heat exchange by the heat exchange core and spraying by the spray device; When the operating mode is the mixed mode, the spray device, the refrigerator and the condenser are turned on, so that the indoor wind enters the inner circulation air duct from the first air suction port, and after heat exchange through the heat exchange core, passes through the refrigerator and is discharged to the indoor from the first air outlet; the outdoor wind enters the outer circulation air duct from the second air suction port, and after heat exchange through the heat exchange core and spraying by the spray device, passes through the condenser and is discharged to the outdoors from the bypass air outlet.

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