Mine air conditioner, mine air conditioner control method and storage medium

Abstract

The present invention discloses a mine air conditioner, a mine air conditioner control method, and a storage medium. The mine air conditioner comprises: a chiller and a terminal; the terminal comprises: a fresh air combination cabinet, a fan coil unit, and a cold radiation panel. The fresh air combination cabinet is located in a fresh air duct, and multiple air outlets are arranged in sequence along the axial direction of the fresh air duct. The fan coil unit and the cold radiation panel are arranged at designated locations within the working face tunnel. The chiller comprises a first evaporator and a second evaporator connected in parallel via a refrigerant pipeline. The chilled water output by the first evaporator is supplied to the fresh air combination cabinet and the fan coil unit, and the chilled water output by the second evaporator is supplied to the cold radiation panel. The chilled water flow rate flowing into the fan coil unit and the cold radiation panel is adjustable. The fan coil unit provides rapid cooling, and the cold radiation panel maintains the working face temperature. The present invention solves the problems of high energy consumption and uneven working face temperature distribution in mine air conditioners.

Description

Technical Field

[0001] The present invention relates to the technical field of mine air conditioning, and in particular to a mine air conditioning, a mine air conditioning control method and a storage medium. Background Art

[0002] At present, mine air conditioning used for underground cooling generally adopts a full air system with fresh air. The fresh air is processed by a direct expansion combination cabinet and sent into the working face tunnel. However, as the tunnel extends, the fresh air cannot effectively cool the deep part of the tunnel, resulting in uneven temperature distribution in the tunnel and uncomfortable working for workers. Moreover, since it is a fresh air system, the fresh air load, personnel load, equipment load, etc. in the mine are all borne by the fresh air, which requires a large fresh air volume, a large cooling capacity, and a high-power fan. As a result, the unit consumes a lot of energy, which is uneconomical.

[0003] Currently, no effective solution has been proposed to the problems of high energy consumption of mine air conditioning and uneven temperature distribution on the working surface in the existing technology. Summary of the Invention

[0004] Embodiments of the present invention provide a mine air conditioner, a mine air conditioner control method, and a storage medium to at least solve the problems of high energy consumption and uneven temperature distribution of working surfaces in the prior art of mine air conditioners.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a mine air conditioner, comprising: a chiller and a terminal;

[0006] The terminal includes: a fresh air combination cabinet, a fan coil unit and a cold radiation plate, the fresh air combination cabinet is located in the fresh air duct, a plurality of air outlets are arranged in sequence along the axial direction of the fresh air duct, and the fan coil unit and the cold radiation plate are arranged at designated positions in the working face lane;

[0007] The chiller includes a first evaporator and a second evaporator connected in parallel through a refrigerant pipeline. The chilled water output by the first evaporator is supplied to the fresh air combination cabinet and the fan coil, and the chilled water output by the second evaporator is supplied to the cold radiation plate. The flow rate of chilled water flowing into the fan coil and the cold radiation plate is adjustable. Rapid cooling is performed through the fan coil, and the working surface temperature is maintained through the cold radiation plate.

[0008] Optionally, the chiller further comprises: a compressor, a condenser, a first throttling element, a refrigerant valve and a second throttling element;

[0009] The first throttling element is connected between the refrigerant outlet of the condenser and the refrigerant inlet of the first evaporator;

[0010] The refrigerant valve and the second throttling element are sequentially connected in series between the refrigerant outlet of the condenser and the refrigerant inlet of the second evaporator.

[0011] Optionally, the number of the fan coil units and the number of the cold radiation panels are both at least one; the cold radiation panels are arranged at the top of the working face tunnel; the fresh air duct is located below the cold radiation panels; based on the cross-section of the working face tunnel, the fan coil units are arranged on the left and right sides of the working face tunnel and discharge air toward the center.

[0012] Optionally, the mine air conditioner further includes:

[0013] a fan coil chilled water valve, located on the chilled water pipeline flowing from the first evaporator to the fan coil;

[0014] The cold water valve of the fresh air combination cabinet is located on the chilled water pipeline flowing from the first evaporator to the fresh air combination cabinet.

[0015] Optionally, a fan coil water inlet regulating valve is provided for each fan coil unit, and a cold radiation panel water inlet regulating valve is provided for each cold radiation panel.

[0016] Optionally, the mine air conditioner further includes:

[0017] a first chilled water pump located in the chilled water outlet pipe of the first evaporator;

[0018] The second chilled water pump is located in the chilled water outlet pipe of the second evaporator.

[0019] The embodiment of the present invention further provides a mine air-conditioning control method, which is applied to the mine air-conditioning described in the embodiment of the present invention. The method includes:

[0020] In response to the power-on command, the system enters the rapid cooling mode, rapidly cools the work surface through the fan coil unit and the fresh air combination cabinet, and controls the flow of chilled water flowing into the fan coil unit according to the temperature distribution of the work surface to ensure a uniform temperature distribution on the work surface;

[0021] When the absolute value of the difference between the average temperature of the working surface and the set temperature of the working surface is less than or equal to the first temperature difference threshold and lasts for the set time, the temperature maintenance mode is entered, and the working surface temperature is maintained by the cold radiation panel and the fresh air combination cabinet, and the flow of chilled water flowing into the cold radiation panel is controlled according to the temperature distribution of the working surface to make the working surface temperature uniform.

[0022] Optionally, the work surface can be quickly cooled using fan coil units and fresh air cabinets, including:

[0023] Turn on the compressor, the first throttling element, the first chilled water pump, the cold water valve of the fresh air combination cabinet and the cold water valve of the fan coil unit, and close the refrigerant valve;

[0024] The first throttling element is connected between the refrigerant outlet of the condenser and the refrigerant inlet of the first evaporator; the refrigerant valve and the second throttling element are connected in series between the refrigerant outlet of the condenser and the refrigerant inlet of the second evaporator.

[0025] Optionally, controlling the flow of chilled water flowing into the fan coil unit according to the temperature distribution of the working surface to make the temperature distribution of the working surface uniform includes:

[0026] Detecting the temperature distribution of the working surface once every first preset time;

[0027] If the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is greater than a preset threshold, the water inlet regulating valve corresponding to the fan coil unit at the maximum temperature point is increased by a first opening, and the water inlet regulating valve corresponding to the fan coil unit at the minimum temperature point is decreased by a first opening;

[0028] If the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is less than or equal to the preset threshold, it is determined that the temperature distribution of the working surface is uniform.

[0029] Optionally, the first opening is determined by the following formula: a=(T max -T min ) / b, where a% represents the first opening, T max Indicates the maximum temperature of the working surface, T min represents the minimum temperature of the working surface, and b represents the first adjustment coefficient.

[0030] Optionally, after controlling the flow of chilled water flowing into the fan coil unit according to the temperature distribution of the working surface so that the temperature distribution of the working surface is uniform, the method further includes:

[0031] Every second preset time, detecting the average temperature of the working surface;

[0032] If the difference between the average temperature of the working surface and the set temperature of the working surface is greater than the first temperature difference threshold, controlling the compressor to increase the first frequency;

[0033] If the difference between the set working surface temperature and the average working surface temperature is greater than the first temperature difference threshold, the compressor is controlled to reduce the first frequency.

[0034] Optionally, the first frequency is determined by the following formula: c=|T 平 -T 设 | / d, where c represents the first frequency, T 平 Indicates the average temperature of the working surface, T 设 represents the set temperature of the working surface, and d represents the second adjustment coefficient.

[0035] Optionally, the work surface temperature can be maintained by using radiant panels and fresh air cabinets, including:

[0036] Keeping the compressor and the first throttling element open, opening the refrigerant valve and the second throttling element, and making the opening of the second throttling element greater than the opening of the first throttling element;

[0037] Keep the cold water valve of the fresh air combination cabinet open, close the cold water valve of the fan coil, reduce the frequency of the first chilled water pump, turn on the second chilled water pump, and the opening of each cold radiation panel water inlet regulating valve is consistent with the opening of the fan coil water inlet regulating valve at the corresponding position.

[0038] Optionally, controlling the flow of chilled water flowing into the cold radiation plate according to the temperature distribution of the working surface to make the temperature distribution of the working surface uniform includes:

[0039] Detecting the temperature distribution of the working surface once every first preset time;

[0040] If the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is greater than a preset threshold, the water inlet regulating valve corresponding to the cold radiation panel at the maximum temperature point is increased by a second opening, and the water inlet regulating valve corresponding to the cold radiation panel at the minimum temperature point is decreased by a second opening;

[0041] If the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is less than or equal to the preset threshold, it is determined that the temperature distribution of the working surface is uniform.

[0042] Optionally, the second opening is determined by the following formula: e=(T max -T min ) / f, where e% represents the second opening, T max Indicates the maximum temperature of the working surface, T min Indicates the minimum temperature of the working surface, and f indicates the third adjustment coefficient.

[0043] Optionally, after controlling the flow of chilled water flowing into the cold radiation plate according to the temperature distribution of the working surface so that the temperature distribution of the working surface is uniform, the method further includes:

[0044] Every second preset time, detecting the average temperature of the working surface;

[0045] If the difference between the average temperature of the working surface and the set temperature of the working surface is greater than the first temperature difference threshold and less than or equal to the second temperature difference threshold, controlling the compressor to increase the first frequency;

[0046] If the difference between the set working surface temperature and the average working surface temperature is greater than the first temperature difference threshold and less than or equal to the second temperature difference threshold, controlling the compressor to reduce the first frequency;

[0047] If the difference between the average temperature of the working surface and the set temperature of the working surface is greater than the second temperature difference threshold, the system enters the joint cooling mode, cools the room through the fan coil, the cold radiation panel and the fresh air combination cabinet, opens the cold water valve of the fan coil, increases the frequency of the first chilled water pump, and makes the opening of each fan coil water inlet regulating valve consistent with the opening of the cold radiation panel water inlet regulating valve at the corresponding position, and controls the compressor to increase the second frequency;

[0048] If the difference between the set working surface temperature and the average working surface temperature is greater than the second temperature difference threshold, controlling the compressor to reduce the second frequency;

[0049] If the absolute value of the difference between the average temperature of the working surface and the set temperature of the working surface is less than or equal to the first temperature difference threshold, the temperature distribution of the working surface is re-detected in the temperature maintenance mode.

[0050] Optionally, the second frequency is determined by the following formula: g=|T 平 -T 设 | / h, where g represents the second frequency, T 平 Indicates the average temperature of the working surface, T 设 represents the set temperature of the working surface, and h represents the fourth adjustment coefficient.

[0051] An embodiment of the present invention further provides a non-volatile computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method described in the embodiment of the present invention are implemented.

[0052] The technical solution of the present invention is applied, and three terminals, namely, fresh air combination cabinet, fan coil unit and cold radiation panel, are used to bear the cooling load required by the working face. The fan coil unit utilizes the return air in the tunnel, and the chilled water inlet temperature required by the cold radiation panel is higher than that of the conventional air treatment terminal. Compared with the mine air conditioning system cooled by the traditional fresh air direct expansion combination cabinet, the mine air conditioning of this embodiment requires less fresh air volume, smaller fan power, and more energy-saving; a chiller is used for cooling, and the refrigerant is used to exchange heat with chilled water instead of directly exchanging heat with air, and water is used as the heat transfer medium The quality is more efficient than air, making the unit more energy-efficient; combining the advantages of rapid cooling by convection heat exchange and maintaining air temperature by radiation heat exchange, the underground is first cooled quickly by fan coil units and fresh air combination cabinets, and then the fan coil units are turned off, and the working surface temperature is maintained by cold radiation panels and fresh air combination cabinets. The corresponding refrigerant and chilled water flow paths are switched according to the different needs of the working surface. The cooling capacity of fan coil units and cold radiation panels can be adjusted, saving energy and ensuring a more uniform temperature distribution on the working surface, solving the problems of high energy consumption of mine air conditioning and uneven temperature distribution on the working surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic diagram of a mine air conditioner provided by an embodiment of the present invention;

[0054] Figure 2 is a schematic diagram of a chiller provided by an embodiment of the present invention;

[0055] Figure 3 This is a schematic diagram of the plan layout of the working face tunnel provided by an embodiment of the present invention;

[0056] Figure 4 Schematic diagram of the cross-sectional arrangement of the working face tunnel provided by an embodiment of the present invention;

[0057] Figure 5 is a flow chart of a mine air conditioning control method provided by an embodiment of the present invention;

[0058] Figure 6 This is a flow chart of mine air conditioning control provided by an embodiment of the present invention;

[0059] Description of reference numerals:

[0060] Fresh air combination cabinet 10, fan coil unit 20, cold radiation panel 30, fresh air duct 40, air supply port 41, first evaporator 51, second evaporator 52, compressor 53, condenser 54, first throttling element 55, refrigerant valve 56, second throttling element 57, fresh air combination cabinet cold water valve 11, fan coil unit cold water valve 21, fan coil unit water inlet regulating valve 22, cold radiation panel water inlet regulating valve 31, first chilled water pump 61, second chilled water pump 62. DETAILED DESCRIPTION

[0061] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0062] It should be noted that the terms "first", "second", etc. in the description, claims, and drawings of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way are interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, products, or apparatus.

[0063] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0064] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0065] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0066] Example 1

[0067] This embodiment provides a mine air conditioner, comprising a chiller and a terminal. The chiller produces chilled water by circulating a refrigerant and supplies the produced chilled water to the terminal. At the terminal, heat exchange between air and the chilled water cools the mine air.

[0068] refer to Figure 1 The terminal includes: a fresh air combination cabinet 10, a fan coil unit 20 and a cold radiation panel 30.

[0069] The fresh air combination cabinet 10 is located in the fresh air duct 40, and multiple air supply outlets 41 are arranged in sequence along the axial direction on the fresh air duct 40. Preferably, the multiple air supply outlets are evenly arranged on the fresh air duct 40. The fresh air enters the fresh air duct 40, is cooled by the fresh air combination cabinet 10, and is evenly delivered to various parts of the working surface through the air supply outlets 41.

[0070] The fan coil unit 20 and the cold radiation panel 30 are arranged at a designated position in the working face tunnel. The designated position is a position in the tunnel where high temperature is likely to occur. In actual application, the high-temperature position can be determined based on the tunnel temperature distribution when using a traditional fresh air mine air-conditioning system. As the above-mentioned designated position, the fan coil unit 20 and the cold radiation panel 30 are arranged at the high-temperature position to achieve fixed-point local cooling, which is conducive to uniform temperature distribution on the working face.

[0071] The chiller includes a first evaporator 51 and a second evaporator 52 connected in parallel via a refrigerant pipeline. The chilled water output from the first evaporator 51 is supplied to the fresh air cabinet 10 and the fan coil unit 20, while the chilled water output from the second evaporator 52 is supplied to the cold radiant panel 30. The chilled water flow rate flowing into the fan coil unit 20 and the cold radiant panel 30 is adjustable. The cooling capacity of the corresponding fan coil unit 20 or cold radiant panel 30 is adjusted according to the temperature distribution of the work surface, allowing for more targeted local adjustment of the cooling supply at different locations, effectively ensuring a more uniform temperature distribution on the work surface. The fan coil unit 20 uses convection heat exchange, while the cold radiant panel 30 uses radiation heat exchange. The fan coil unit 20 provides rapid cooling, while the cold radiant panel 30 maintains the work surface temperature. Switching to the corresponding flow path based on the actual needs of the work surface achieves cooling more quickly, saves energy, and ensures a more uniform temperature distribution on the work surface.

[0072] This embodiment adopts three terminals, namely, fresh air combination cabinet 10, fan coil unit 20 and cold radiation panel 30, to bear the cooling load required by the working face. The fan coil unit 20 utilizes the return air in the tunnel, and the chilled water inlet temperature required by the cold radiation panel 30 is higher than that of the conventional air treatment terminal. Compared with the mine air conditioning system cooled by the traditional fresh air direct expansion combination cabinet, the mine air conditioning of this embodiment requires less fresh air volume, smaller fan power, and more energy-saving; a chiller is used for cooling, and the refrigerant is used to exchange heat with chilled water instead of directly exchanging heat with air. Water as a heat transfer medium has a higher heat transfer rate than air. efficiency, making the unit more energy efficient; combining the advantages of rapid cooling by convection heat exchange and maintaining air temperature by radiation heat exchange, the underground is first cooled quickly by the fan coil unit 20 and the fresh air combination cabinet 10, and then the fan coil unit 20 is turned off, and the working surface temperature is maintained by the cold radiation panel 30 and the fresh air combination cabinet 10. The corresponding refrigerant and chilled water flow paths are switched according to the different needs of the working surface. The cooling capacity of the fan coil unit 20 and the cold radiation panel 30 can be adjusted, saving energy and ensuring a more uniform temperature distribution on the working surface, solving the problems of high energy consumption of mine air conditioning and uneven temperature distribution on the working surface.

[0073] Considering that the chilled water inlet temperature required by the cold radiation panel 30 is higher than the chilled water inlet temperature required by the fan coil unit 20 and the fresh air combination cabinet 10, the evaporation temperature of the first evaporator 51 and the evaporation temperature of the second evaporator 52 are different. Two evaporation temperatures are designed to provide two outlet water temperatures to meet the chilled water inlet temperature requirements of different terminals.

[0074] like Figure 2, is a schematic diagram of a chiller, which further includes: a compressor 53, a condenser 54, a first throttling element 55, a refrigerant valve 56, and a second throttling element 57. The first throttling element 55 is connected between the refrigerant outlet of the condenser 54 and the refrigerant inlet of the first evaporator 51. That is, the compressor 53, the condenser 54, the first throttling element 55, and the first evaporator 51 are connected in sequence to form a refrigerant circulation loop. The refrigerant valve 56 and the second throttling element 57 are connected in series between the refrigerant outlet of the condenser 54 and the refrigerant inlet of the second evaporator 52. That is, the compressor 53, the condenser 54, the refrigerant valve 56, the second throttling element 57, and the second evaporator 52 are connected in sequence to form another refrigerant circulation loop.

[0075] The throttling element can be a device with a throttling function, such as an electronic expansion valve. Refrigerant valve 56 is used to control the refrigerant diversion. When the second evaporator 52 is not in use, refrigerant valve 56 is closed. When the second evaporator 52 is in use, refrigerant valve 56 is opened. Refrigerant valve 56 can be a valve with an on-off control function.

[0076] This embodiment can realize the switching of the refrigerant flow path by setting the first throttling element 55, the refrigerant valve 56 and the second throttling element 57, and the use of two throttling elements can respectively control the throttling of the two evaporators to meet the chilled water inlet temperature requirements of different ends and achieve more precise temperature regulation.

[0077] The number of fan coil units 20 and the number of cold radiation panels 30 are both at least one, so as to meet the cooling demand of different high-temperature positions and ensure uniform temperature distribution on the working surface.

[0078] refer to Figure 3 and Figure 4 The cooling radiant panels 30 are placed at the top of the working face tunnel, and the fresh air duct 40 is located below the cooling radiant panels 30. Based on the cross-section of the working face tunnel, the fan coil units 20 are placed on both sides of the tunnel, discharging air toward the center. This arrangement achieves targeted, localized cooling, promoting uniform temperature distribution across the working face.

[0079] The mine air conditioner also includes a fan coil unit cold water valve 21 located on the chilled water pipeline flowing from the first evaporator 51 to the fan coil unit 20; and a fresh air cabinet cold water valve 11 located on the chilled water pipeline flowing from the first evaporator 51 to the fresh air cabinet 10. This embodiment uses the fan coil unit cold water valve 21 and the fresh air cabinet cold water valve 11 to switch the chilled water pipeline according to the actual needs of the work surface. For example, the fan coil unit cold water valve 21 is opened in rapid cooling mode and closed in temperature maintenance mode.

[0080] Specifically, cold water valves may be provided for the fan coil units on both sides respectively, or the fan coil units on both sides may share one cold water valve.

[0081] Each fan coil unit 20 is provided with a corresponding fan coil unit water inlet regulating valve 22. In this embodiment, the cooling capacity of a single fan coil unit can be adjusted through the fan coil unit water inlet regulating valve 22, which is conducive to uniform tunnel temperature.

[0082] Each cold radiation panel 30 is provided with a corresponding cold radiation panel water inlet regulating valve 31. In this embodiment, the cold radiation panel water inlet regulating valve 31 can adjust the cooling capacity of a single cold radiation panel, which is conducive to uniform tunnel temperature.

[0083] The fan coil cold water valve 21, the fresh air combination cabinet cold water valve 11, the fan coil water inlet regulating valve 22 and the cold radiation panel water inlet regulating valve 31 can all be valve components with adjustable opening.

[0084] The mine air conditioner may further include a first chilled water pump 61 located in the chilled water outlet pipe of the first evaporator 51. In this embodiment, the first chilled water pump 61 can drive the chilled water output from the first evaporator 51 to flow to the fan coil 20 and the fresh air combination cabinet 10.

[0085] The mine air conditioner may further include a second chilled water pump 62 located in the chilled water outlet pipe of the second evaporator 52 . In this embodiment, the second chilled water pump 62 can drive the chilled water output from the second evaporator 52 to flow to the cold radiation panel 30 .

[0086] Example 2

[0087] This embodiment provides a mine air conditioning control method, which is applied to the mine air conditioning described in the above embodiment. Figure 5 This is a flow chart of a mine air conditioning control method provided by an embodiment of the present invention. Figure 5 As shown, the method includes the following steps:

[0088] S501, in response to the power-on command, enters the rapid cooling mode, quickly cools the working surface through the fan coil 20 and the fresh air combination cabinet 10, and controls the flow of chilled water flowing into the fan coil 20 according to the temperature distribution of the working surface to make the temperature distribution of the working surface uniform.

[0089] S502, when the absolute value of the difference between the average temperature of the working surface and the set temperature of the working surface is less than or equal to the first temperature difference threshold and lasts for the set time, enter the temperature maintenance mode, maintain the working surface temperature through the cold radiation plate 30 and the fresh air combination cabinet 10, and control the flow of chilled water flowing into the cold radiation plate 30 according to the temperature distribution of the working surface to make the working surface temperature uniform.

[0090] The first temperature difference threshold is the design temperature difference of the working surface, which can be set based on experience or actual conditions, for example, the first temperature difference threshold is set to 1° C. The setting time can be set based on actual conditions, for example, the setting time is 20 minutes.

[0091] This embodiment adopts three terminals, namely, a fresh air combination cabinet 10, a fan coil unit 20 and a cold radiation panel 30, to bear the cooling load required by the working face. The fan coil unit 20 utilizes the return air in the tunnel, and the chilled water inlet temperature required by the cold radiation panel 30 is higher than that of the conventional air treatment terminal. Compared with the mine air conditioning system cooled by the traditional fresh air direct expansion combination cabinet, the mine air conditioning of this embodiment requires less fresh air volume, smaller fan power, and more energy-saving; a chiller is used for cooling, and the refrigerant is used to exchange heat with chilled water instead of directly exchanging heat with the air. Water is more efficient as a heat transfer medium than air, making the unit more energy-efficient; combined with convection heat exchange for rapid cooling and radiation The advantage of radiant heat exchange in maintaining air temperature is that the underground is first cooled quickly through the fan coil unit 20 and the fresh air combination cabinet 10, and then the fan coil unit 20 is turned off, and the working surface temperature is maintained through the cold radiation plate 30 and the fresh air combination cabinet 10. The corresponding refrigerant and chilled water flow paths are switched according to the different needs of the working surface, and the chilled water flow flowing into the fan coil unit 20 is controlled according to the temperature distribution of the working surface in the rapid cooling mode. The chilled water flow flowing into the cold radiation plate 30 is controlled according to the temperature distribution of the working surface in the temperature maintenance mode, so that the working surface temperature is evenly distributed, which solves the problem of high energy consumption of mine air conditioning and uneven temperature distribution of the working surface.

[0092] (1) Rapid cooling mode

[0093] Rapidly cooling the work surface through the fan coil unit 20 and the fresh air cabinet assembly 10 involves: activating the compressor 53, the first throttling element 55, the first chilled water pump 61, the fresh air cabinet assembly cold water valve 11, and the fan coil unit cold water valve 21, and closing the refrigerant valve 56. The first throttling element 55 is connected between the refrigerant outlet of the condenser 54 and the refrigerant inlet of the first evaporator 51; the refrigerant valve 56 and the second throttling element 57 are sequentially connected in series between the refrigerant outlet of the condenser 54 and the refrigerant inlet of the second evaporator 52. In this embodiment, in rapid cooling mode, the aforementioned control switches the refrigerant and chilled water flow paths, enabling the fan coil unit 20 and the fresh air cabinet assembly 10 to operate and achieve rapid cooling.

[0094] In actual applications, the flow of chilled water flowing into the fan coil unit 20 can be controlled by controlling the opening of the fan coil unit water inlet regulating valve 22. Specifically, the flow of chilled water flowing into the fan coil unit 20 is controlled according to the working surface temperature distribution so that the working surface temperature is evenly distributed, including: detecting the working surface temperature distribution once every first preset time; if the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is greater than a preset threshold, increasing the first opening of the water inlet regulating valve corresponding to the fan coil unit at the maximum temperature point, and reducing the first opening of the water inlet regulating valve corresponding to the fan coil unit at the minimum temperature point; if the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is less than or equal to the preset threshold, determining that the working surface temperature distribution is even.

[0095] The preset threshold can be set according to actual conditions, for example, the preset threshold is set to 1° C. The first preset time is a detection period for the temperature distribution of the working surface, and the first preset time can be set according to actual conditions, for example, the first preset time is set to 5 minutes.

[0096] This embodiment periodically detects the temperature distribution of the working surface in the rapid cooling mode, and controls the cooling capacity of a single fan coil unit according to the temperature distribution of the working surface, thereby making the temperature distribution of the working surface uniform.

[0097] Furthermore, the first opening degree can be determined by the following formula: a=(T max -T min ) / b, where a% represents the first opening, T max Indicates the maximum temperature of the working surface, T min represents the minimum working surface temperature, and b represents the first adjustment coefficient. The first adjustment coefficient can be pre-set according to actual conditions, for example, b = 0.4. This embodiment uses percentages to represent the opening degree. A fully open fan coil water inlet regulating valve 22 corresponds to an opening degree of 100% (i.e., the maximum opening degree), and a fully closed fan coil water inlet regulating valve 22 corresponds to an opening degree of 0%. In this embodiment, in the rapid cooling mode and when the working surface temperature distribution is uneven, the adjustment range of the fan coil water inlet regulating valve 22 is determined based on the difference between the maximum working surface temperature and the minimum working surface temperature, thereby achieving more precise temperature control.

[0098] After the working surface temperature is evenly distributed, the average working surface temperature can be obtained and controlled so that the average working surface temperature reaches the set working surface temperature. Specifically, after controlling the flow of chilled water flowing into the fan coil unit 20 based on the working surface temperature distribution to ensure a uniform working surface temperature distribution, the method further includes: detecting the average working surface temperature once every second preset time interval; if the difference between the average working surface temperature and the set working surface temperature is greater than a first temperature difference threshold, controlling the compressor 53 to increase the first frequency; and if the difference between the set working surface temperature and the average working surface temperature is greater than the first temperature difference threshold, controlling the compressor 53 to decrease the first frequency.

[0099] The second preset time is the detection period of the average temperature of the working surface. The second preset time can be set according to actual conditions. For example, the second preset time is set to 3 minutes.

[0100] In this embodiment, when in rapid cooling mode and the working surface temperature is evenly distributed, the compressor frequency is adjusted based on the deviation between the average working surface temperature and the set working surface temperature, so that the average working surface temperature reaches the set working surface temperature, avoiding insufficient compressor output and unnecessary compressor energy consumption, and meeting the cooling needs while also taking energy saving into account.

[0101] Furthermore, the first frequency can be determined by the following formula: c=|T 平 -T 设 | / d, where c represents the first frequency, T 平 Indicates the average temperature of the working surface, T 设 represents the set working surface temperature, and d represents the second adjustment coefficient, which can be preset based on actual conditions, for example, d = 0.2. In this embodiment, in rapid cooling mode, the compressor adjustment range is determined based on the deviation between the average working surface temperature and the set working surface temperature, achieving precise adjustment while meeting cooling requirements and balancing energy savings.

[0102] (2) Maintain temperature mode

[0103] The working surface temperature is maintained through the cold radiation panels 30 and the fresh air combination cabinet 10, including: keeping the compressor 53 and the first throttling element 55 on, opening the refrigerant valve 56 and the second throttling element 57, and ensuring that the opening of the second throttling element 57 is greater than that of the first throttling element 55; keeping the fresh air combination cabinet cold water valve 11 open, closing the fan coil cold water valve 21, reducing the frequency of the first chilled water pump 61, and opening the second chilled water pump 62; and ensuring that the opening of each cold radiation panel water inlet regulating valve 31 is consistent with the opening of the fan coil water inlet regulating valve 22 at the corresponding position. In this embodiment, in the temperature maintenance mode, the refrigerant flow path and the chilled water flow path are switched through the above control, so that the cold radiation panels 30 and the fresh air combination cabinet 10 operate to maintain the working surface temperature and reduce energy consumption.

[0104] In practical applications, the flow of chilled water flowing into the cold radiation panel 30 can be controlled by controlling the opening of the cold radiation panel water inlet regulating valve 31. Specifically, the flow of chilled water flowing into the cold radiation panel 30 is controlled according to the temperature distribution of the working surface so that the temperature distribution of the working surface is uniform, including: detecting the temperature distribution of the working surface once every first preset time; if the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is greater than a preset threshold, increasing the opening of the water inlet regulating valve corresponding to the cold radiation panel at the maximum temperature point by a second degree, and reducing the opening of the water inlet regulating valve corresponding to the cold radiation panel at the minimum temperature point by a second degree; if the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is less than or equal to the preset threshold, determining that the temperature distribution of the working surface is uniform.

[0105] In this embodiment, the temperature distribution of the working surface is periodically detected in the temperature maintenance mode, and the cooling capacity of a single cold radiation panel is controlled according to the temperature distribution of the working surface, so that the temperature distribution of the working surface is uniform.

[0106] Furthermore, the second opening degree can be determined by the following formula: e=(T max -T min ) / f, where e% represents the second opening, T maxIndicates the maximum temperature of the working surface, T min represents the minimum working surface temperature, and f represents the third adjustment coefficient. The third adjustment coefficient can be preset based on actual conditions, for example, f = 0.5. This embodiment uses percentages to represent the opening degree. A fully open cold radiation panel water inlet regulating valve 31 corresponds to a 100% opening degree (i.e., maximum opening degree), and a fully closed cold radiation panel water inlet regulating valve 31 corresponds to a 0% opening degree. In this embodiment, when operating in temperature maintenance mode and the working surface temperature distribution is uneven, the adjustment range of the cold radiation panel water inlet regulating valve 31 is determined based on the difference between the maximum and minimum working surface temperatures, achieving more precise temperature control.

[0107] After the working surface temperature is evenly distributed, the average working surface temperature can be obtained and controlled so that the average working surface temperature reaches the set working surface temperature. Specifically, after controlling the flow of chilled water flowing into the cold radiation plate 30 according to the working surface temperature distribution to make the working surface temperature evenly distributed, the following steps are further included:

[0108] Every second preset time, detecting the average temperature of the working surface;

[0109] If the difference between the average temperature of the working surface and the set temperature of the working surface is greater than the first temperature difference threshold and less than or equal to the second temperature difference threshold, the compressor 53 is controlled to increase the first frequency;

[0110] If the difference between the set working surface temperature and the average working surface temperature is greater than the first temperature difference threshold and less than or equal to the second temperature difference threshold, the compressor 53 is controlled to reduce the first frequency;

[0111] If the difference between the average working surface temperature and the set working surface temperature is greater than the second temperature difference threshold, the system enters the joint cooling mode, and the fan coil unit 20, the cold radiation panel 30, and the fresh air combination cabinet 10 are used to cool the room together. The fan coil unit cold water valve 21 is opened, and the frequency of the first chilled water pump 61 is increased. The opening of each fan coil unit water inlet regulating valve 22 is respectively consistent with the opening of the cold radiation panel water inlet regulating valve 31 at the corresponding position, and the compressor 53 is controlled to increase the second frequency.

[0112] If the difference between the set working surface temperature and the average working surface temperature is greater than a second temperature difference threshold, the compressor 53 is controlled to reduce the second frequency;

[0113] If the absolute value of the difference between the average temperature of the working surface and the set temperature of the working surface is less than or equal to the first temperature difference threshold, the temperature distribution of the working surface is re-detected in the temperature maintenance mode.

[0114] The second temperature difference threshold is the upper limit of the working surface temperature difference, which can be set based on experience or actual conditions. For example, the second temperature difference threshold is set to 3°C.

[0115] In this embodiment, when the working surface temperature is maintained in the temperature maintenance mode and the working surface temperature is uniformly distributed, the compressor frequency is adjusted based on the deviation between the average working surface temperature and the set working surface temperature to ensure that the average working surface temperature reaches the set working surface temperature, thereby avoiding insufficient compressor output and unnecessary compressor energy consumption, thereby meeting the cooling demand while also taking energy conservation into account. If the working surface temperature is too high (i.e., the difference between the average working surface temperature and the set working surface temperature is greater than the second temperature difference threshold), the system enters the joint cooling mode, and the fan coil unit 20, the cold radiation panel 30, and the fresh air combination cabinet 10 are used to jointly cool the air, thereby quickly meeting the cooling demand and achieving rapid cooling.

[0116] Furthermore, the second frequency can be determined by the following formula: g = |T 平 -T 设 | / h, where g represents the second frequency, T 平 Indicates the average temperature of the working surface, T 设 represents the set working surface temperature, and h represents the fourth adjustment coefficient, where h>d. The fourth adjustment coefficient can be preset based on actual conditions, for example, h=0.3. In this embodiment, in the temperature maintenance mode, when the difference between the average working surface temperature and the set working surface temperature is greater than the second temperature difference threshold, the adjustment range of the compressor is determined based on the deviation between the average working surface temperature and the set working surface temperature, achieving precise adjustment, while meeting cooling requirements and also taking energy conservation into account.

[0117] Example 3

[0118] This embodiment, based on the above embodiment, illustrates the mine air conditioner and its control method with reference to the accompanying drawings. However, it should be noted that this specific embodiment is only intended to better illustrate the present application and does not constitute an undue limitation of the present application. Explanations of terms that are identical or corresponding to those in the above embodiment will not be repeated in this embodiment.

[0119] refer to Figure 2 and Figure 3 The refrigerant flow and chilled water flow directions in different modes are as follows:

[0120] (1) The mine air conditioner needs to be cooled quickly after it is turned on. The fan coil unit 20 and the fresh air combination cabinet 10 work as follows:

[0121] The refrigerant flows as follows: compressor 53 → condenser 54 → first throttling element 55 → first evaporator 51 → compressor 53;

[0122] The chilled water output from the first evaporator 51 is divided into three paths:

[0123] ① First evaporator 51 → first chilled water pump 61 → fresh air combination cabinet cold water valve 11 → fresh air combination cabinet 10 → first evaporator 51;

[0124] ② First evaporator 51 → first chilled water pump 61 → fan coil chilled water valve 21 (located at Figure 3 Above) → fan coil 20 on the left side of the working surface → first evaporator 51;

[0125] ③ First evaporator 51 → first chilled water pump 61 → fan coil chilled water valve 21 (located at Figure 3 below) → fan coil 20 on the right side of the working surface → first evaporator 51.

[0126] (2) It is necessary to maintain the working surface temperature, and the cold radiation panel 30 and the fresh air combination cabinet 10 work:

[0127] The refrigerant is divided into 2 routes:

[0128] ① Compressor 53 → condenser 54 → first throttling element 55 → first evaporator 51 → compressor 53;

[0129] ② Compressor 53 → condenser 54 → refrigerant valve 56 → second throttling element 57 → second evaporator 52 → compressor 53;

[0130] The chilled water flow path output by the first evaporator 51 is: first evaporator 51 → first chilled water pump 61 → fresh air combination cabinet cold water valve 11 → fresh air combination cabinet 10 → first evaporator 51;

[0131] The chilled water flow path output by the second evaporator 52 is: second evaporator 52 → second chilled water pump 62 → cold radiation panel 30 → second evaporator 52 .

[0132] (3) The working surface temperature is too high, and the cold radiation panel 30, fan coil unit 20 and fresh air combination cabinet 10 need to work together:

[0133] The refrigerant is divided into 2 routes:

[0134] ① Compressor 53 → condenser 54 → first throttling element 55 → first evaporator 51 → compressor 53;

[0135] ② Compressor 53 → condenser 54 → refrigerant valve 56 → second throttling element 57 → second evaporator 52 → compressor 53;

[0136] The chilled water output from the first evaporator 51 is divided into three paths:

[0137] ① First evaporator 51 → first chilled water pump 61 → fresh air combination cabinet cold water valve 11 → fresh air combination cabinet 10 → first evaporator 51;

[0138] ② First evaporator 51 → first chilled water pump 61 → fan coil chilled water valve 21 (located at Figure 3 Above) → fan coil 20 on the left side of the working surface → first evaporator 51;

[0139] ③ First evaporator 51 → first chilled water pump 61 → fan coil chilled water valve 21 (located at Figure 3 below) → fan coil 20 on the right side of the working surface → first evaporator 51.

[0140] The chilled water flow path output by the second evaporator 52 is: second evaporator 52 → second chilled water pump 62 → cold radiation panel 30 → second evaporator 52 .

[0141] like Figure 6 As shown in the figure, the mine air conditioning control process includes the following steps:

[0142] S601, the mine air conditioner is turned on and enters the rapid cooling mode.

[0143] S602: The compressor 53 operates at an initial frequency, and the refrigerant valve 56 is closed.

[0144] S603: After running for time t1, use infrared imaging monitoring to detect the temperature distribution of the working surface. t1 represents the first preset time.

[0145] S604, determine whether T is satisfied max -T min ≤1℃, if yes, it means the working surface temperature is evenly distributed, go to S606, if no, it means the working surface temperature is unevenly distributed, go to S605. max Indicates the maximum temperature of the working surface, T min Indicates the minimum temperature of the working surface.

[0146] S605: Adjust the water inlet regulating valve 22 of the fan coil unit in the corresponding area according to the infrared monitoring imaging, and return to S603 to re-detect the temperature distribution of the working surface. Specifically, for the fan coil unit at the maximum temperature point, open its water inlet regulating valve a% higher, and for the fan coil unit at the minimum temperature point, open its water inlet regulating valve a% lower, a=(T max -T min ) / b.

[0147] S606, after running for t2 time, detect the average temperature of the working surface T 平 , and T 平 and the working surface set temperature T 设 Compare and determine whether |T is satisfied 平 -T 设 |>X, if yes, go to S607, if no, go to S610. X represents the first temperature difference threshold. t2 represents the second preset time.

[0148] S607, determine whether T is satisfied 平 -T 设 >X, if yes, go to S608, if no, indicate T 设-T 平 >X, enter S609.

[0149] S608, the frequency of the compressor 53 is increased by c Hz, and the process returns to S606 to re-detect T 平 And with T 设 Compare. c=|T 平 -T 设 | / d.

[0150] S609, the frequency of compressor 53 is reduced by c Hz, and the process returns to S606 to re-detect T 平 And with T 设 Make a comparison.

[0151] S610, determine whether |T is satisfied 平 -T 设 ∣≤X and lasts for 20 minutes. If so, go to S611. If not, it means there is ∣T in the last 20 minutes. 平 -T 设 If |>X, return to S603 to re-check the temperature distribution of the working surface.

[0152] S611, |T 平 -T 设 If ∣≤X and lasts for 20 minutes, the unit enters the temperature maintenance mode: the fan coil unit's chilled water valve 21 is closed, the frequency of the first chilled water pump 61 is reduced by 25%, the refrigerant valve 56 is opened and the opening is adjusted to 50%, the opening of the second throttling element 57 = the opening of the first throttling element 55 + 25%, and the opening of the cold radiation panel water inlet regulating valve 31 replicates the opening of the fan coil unit's water inlet regulating valve 22 at the same measuring point.

[0153] S612: After running for t1 time, use infrared imaging monitoring to detect the temperature distribution of the working surface.

[0154] S613, determine whether T is satisfied max -T min ≤1℃, if yes, it means the working surface temperature is evenly distributed, go to S615, if no, it means the working surface temperature is unevenly distributed, go to S614.

[0155] S614, adjust the water inlet regulating valve 31 of the cold radiation panel in the corresponding area according to the infrared monitoring imaging, and return to S612 to re-detect the temperature distribution of the working surface. Specifically, for the cold radiation panel at the maximum temperature point, open its water inlet regulating valve by e%, and for the cold radiation panel at the minimum temperature point, open its water inlet regulating valve by e%. e=(T max -T min ) / f.

[0156] S615, after running for t2 time, detect the average temperature of the working surface T 平, and T 平 and the working surface set temperature T 设 Compare and determine whether |T is satisfied 平 -T 设 |>X, if yes, go to S616, if not, return to S612.

[0157] S616, determine whether |T is satisfied 平 -T 设 |>Y, if yes, proceed to S617, if no, proceed to S620. Y represents the second temperature difference threshold.

[0158] S617, determine whether T is satisfied 平 -T 设 >Y, if yes, go to S619, if no, indicate T 设 -T 平 >Y, enter S618.

[0159] S618, the frequency of compressor 53 is lowered by g Hz, and the process returns to S615 to re-test T 平 And with T 设 Compare. g=|T 平 -T 设 | / h.

[0160] S619, enter the common cooling mode, open the fan coil cold water valve 21, increase the opening of the first chilled water pump 61 by 25%, and copy the opening of the fan coil water inlet regulating valve 22 to the opening of the cold radiation panel water inlet regulating valve 31 at the same measuring point. Increase the frequency of the compressor 53 by g Hz, and return to S615 to re-test T 平 And with T 设 Make a comparison.

[0161] S620, determine whether Y≥T 平 -T 设 >X, if yes, go to S621, if no, it means Y≥T 设 -T 平 >X, enter S622.

[0162] S621, the frequency of compressor 53 is increased by c Hz, and the system returns to S615 to re-test T 平 And with T 设 Make a comparison.

[0163] S622, reduce the frequency of compressor 53 by c Hz, return to S615 and re-check T 平 And with T 设 Make a comparison.

[0164] This embodiment uses three terminal devices, namely, cold radiation panels, fresh air combination cabinets, and fan coil units, to bear the cooling load required by the working face, saving energy consumption. Refrigerant and chilled water are used for heat exchange instead of direct heat exchange between the refrigerant and the air. Since water is more efficient than air as a heat transfer medium, the air conditioning efficiency is higher. Based on the temperature distribution of the traditional fresh air system tunnel, cold radiation panels and fan coil units are arranged at high temperature locations to achieve localized cooling. Combining the advantages of rapid cooling through convection heat exchange and maintaining air temperature through radiation heat exchange, the corresponding refrigerant and chilled water flow paths are switched according to the different needs of the working face. The fan coil unit is first used to quickly cool the underground, and then the fan coil unit is turned off. The cold radiation panel is used to maintain the air temperature of the working face. The opening of the terminal water inlet regulating valve is adjusted by actually detecting the temperature distribution of the working face, effectively ensuring a uniform working face temperature. The fan coil unit utilizes the return air in the tunnel, and the chilled water inlet temperature required for the cold radiation panel is higher than that of the conventional air treatment terminal. Compared with the traditional mine air conditioning system with fresh air direct expansion cabinet cooling, this solution requires less fresh air volume, smaller fan power, more uniform working surface temperature distribution, and more energy-efficient system.

[0165] Example 4

[0166] This embodiment provides a non-volatile computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method described in the above embodiment are implemented.

[0167] Example 5

[0168] This embodiment provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in the above embodiment when executing the computer program.

[0169] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0170] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A mine air conditioner, characterized in that: include: Chillers and terminals; The terminal includes: a fresh air combination cabinet, a fan coil unit and a cold radiation plate, the fresh air combination cabinet is located in the fresh air duct, a plurality of air outlets are arranged in sequence along the axial direction of the fresh air duct, and the fan coil unit and the cold radiation plate are arranged at designated positions in the working face lane; The chiller includes a first evaporator and a second evaporator connected in parallel through a refrigerant pipeline. The chilled water output by the first evaporator is supplied to the fresh air combination cabinet and the fan coil, and the chilled water output by the second evaporator is supplied to the cold radiation plate. The flow rate of chilled water flowing into the fan coil and the cold radiation plate is adjustable. Rapid cooling is performed through the fan coil, and the working surface temperature is maintained through the cold radiation plate.

2. The mine air conditioner according to claim 1, characterized in that: The chiller also includes: a compressor, a condenser, a first throttling element, a refrigerant valve and a second throttling element; The first throttling element is connected between the refrigerant outlet of the condenser and the refrigerant inlet of the first evaporator; The refrigerant valve and the second throttling element are sequentially connected in series between the refrigerant outlet of the condenser and the refrigerant inlet of the second evaporator.

3. The mine air conditioner according to claim 1, characterized in that: The number of the fan coil units and the number of the cold radiation panels are both at least one; the cold radiation panels are arranged at the top of the working face tunnel; the fresh air duct is located below the cold radiation panels; based on the cross-section of the working face tunnel, the fan coil units are arranged on the left and right sides of the working face tunnel and discharge air toward the center.

4. The mine air conditioner according to claim 1, characterized in that: The mine air conditioner also includes: a fan coil chilled water valve, located on the chilled water pipeline flowing from the first evaporator to the fan coil; The cold water valve of the fresh air combination cabinet is located on the chilled water pipeline flowing from the first evaporator to the fresh air combination cabinet.

5. The mine air conditioner according to claim 1, characterized in that: Each fan coil unit is provided with a corresponding fan coil unit water inlet regulating valve, and each cold radiation panel is provided with a corresponding cold radiation panel water inlet regulating valve.

6. The mine air conditioner according to any one of claims 1 to 5, characterized in that: The mine air conditioner also includes: a first chilled water pump located in the chilled water outlet pipe of the first evaporator; The second chilled water pump is located in the chilled water outlet pipe of the second evaporator.

7. A mine air conditioning control method, characterized in that: Applicable to the mine air conditioner according to any one of claims 1 to 6, the method comprising: In response to the power-on command, the system enters the rapid cooling mode, rapidly cools the work surface through the fan coil unit and the fresh air combination cabinet, and controls the flow of chilled water flowing into the fan coil unit according to the temperature distribution of the work surface to ensure a uniform temperature distribution on the work surface; When the absolute value of the difference between the average temperature of the working surface and the set temperature of the working surface is less than or equal to the first temperature difference threshold and lasts for the set time, the temperature maintenance mode is entered, and the working surface temperature is maintained by the cold radiation panel and the fresh air combination cabinet, and the flow of chilled water flowing into the cold radiation panel is controlled according to the temperature distribution of the working surface to make the working surface temperature uniform.

8. The method according to claim 7, characterized in that The work surface is quickly cooled by fan coil units and fresh air combination cabinets, including: Turn on the compressor, the first throttling element, the first chilled water pump, the cold water valve of the fresh air combination cabinet and the cold water valve of the fan coil unit, and close the refrigerant valve; The first throttling element is connected between the refrigerant outlet of the condenser and the refrigerant inlet of the first evaporator; the refrigerant valve and the second throttling element are connected in series between the refrigerant outlet of the condenser and the refrigerant inlet of the second evaporator.

9. The method according to claim 7, characterized in that Controlling the flow of chilled water flowing into the fan coil unit according to the temperature distribution of the working surface so that the temperature of the working surface is evenly distributed includes: Detecting the temperature distribution of the working surface once every first preset time; If the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is greater than a preset threshold, the water inlet regulating valve corresponding to the fan coil unit at the maximum temperature point is increased by a first opening, and the water inlet regulating valve corresponding to the fan coil unit at the minimum temperature point is decreased by a first opening; If the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is less than or equal to the preset threshold, it is determined that the temperature distribution of the working surface is uniform.

10. The method according to claim 9, characterized in that The first opening is determined by the following formula: a=(T max -T min ) / b, where a% represents the first opening, T max Indicates the maximum temperature of the working surface, T min represents the minimum temperature of the working surface, and b represents the first adjustment coefficient.

11. The method according to claim 7, characterized in that After controlling the flow of chilled water flowing into the fan coil unit according to the temperature distribution of the working surface so that the temperature of the working surface is evenly distributed, the method further includes: Every second preset time, detecting the average temperature of the working surface; If the difference between the average temperature of the working surface and the set temperature of the working surface is greater than the first temperature difference threshold, controlling the compressor to increase the first frequency; If the difference between the set working surface temperature and the average working surface temperature is greater than the first temperature difference threshold, the compressor is controlled to reduce the first frequency.

12. The method according to claim 11, characterized in that The first frequency is determined by the following formula: c=|T 平 -T 设 | / d, where c represents the first frequency, T 平 Indicates the average temperature of the working surface, T 设 represents the set temperature of the working surface, and d represents the second adjustment coefficient.

13. The method according to claim 7, characterized in that Maintaining work surface temperature through radiant panels and fresh air cabinets, including: Keeping the compressor and the first throttling element open, opening the refrigerant valve and the second throttling element, and making the opening of the second throttling element greater than the opening of the first throttling element; Keep the cold water valve of the fresh air combination cabinet open, close the cold water valve of the fan coil, reduce the frequency of the first chilled water pump, turn on the second chilled water pump, and the opening of each cold radiation panel water inlet regulating valve is consistent with the opening of the fan coil water inlet regulating valve at the corresponding position.

14. The method according to claim 7, wherein: Controlling the flow of chilled water flowing into the cold radiation plate according to the temperature distribution of the working surface so that the temperature of the working surface is evenly distributed includes: Detecting the temperature distribution of the working surface once every first preset time; If the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is greater than a preset threshold, the water inlet regulating valve corresponding to the cold radiation panel at the maximum temperature point is increased by a second opening, and the water inlet regulating valve corresponding to the cold radiation panel at the minimum temperature point is decreased by a second opening; If the difference between the maximum temperature of the working surface and the minimum temperature of the working surface is less than or equal to the preset threshold, it is determined that the temperature distribution of the working surface is uniform.

15. The method according to claim 14, characterized in that The second opening is determined by the following formula: e=(T max -T min ) / f, where e% represents the second opening, T max Indicates the maximum temperature of the working surface, T min Indicates the minimum temperature of the working surface, and f indicates the third adjustment coefficient.

16. The method according to claim 7, characterized in that After controlling the flow of chilled water flowing into the cold radiation plate according to the temperature distribution of the working surface so that the temperature distribution of the working surface is uniform, the method further includes: Every second preset time, detecting the average temperature of the working surface; If the difference between the average temperature of the working surface and the set temperature of the working surface is greater than the first temperature difference threshold and less than or equal to the second temperature difference threshold, controlling the compressor to increase the first frequency; If the difference between the set working surface temperature and the average working surface temperature is greater than the first temperature difference threshold and less than or equal to the second temperature difference threshold, controlling the compressor to reduce the first frequency; If the difference between the average temperature of the working surface and the set temperature of the working surface is greater than the second temperature difference threshold, the system enters the joint cooling mode, cools the room through the fan coil, the cold radiation panel and the fresh air combination cabinet, opens the cold water valve of the fan coil, increases the frequency of the first chilled water pump, and makes the opening of each fan coil water inlet regulating valve consistent with the opening of the cold radiation panel water inlet regulating valve at the corresponding position, and controls the compressor to increase the second frequency; If the difference between the set working surface temperature and the average working surface temperature is greater than the second temperature difference threshold, controlling the compressor to reduce the second frequency; If the absolute value of the difference between the average temperature of the working surface and the set temperature of the working surface is less than or equal to the first temperature difference threshold, the temperature distribution of the working surface is re-detected in the temperature maintenance mode.

17. The method according to claim 16, characterized in that The second frequency is determined by the following formula: g = |T 平 -T 设 | / h, where g represents the second frequency, T 平 Indicates the average temperature of the working surface, T 设 represents the set temperature of the working surface, and h represents the fourth adjustment coefficient.

18. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 7 to 17 are implemented.

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