Direct-current post air-conditioning system of power distribution substation
By adopting a DC post air conditioning system in the power distribution station, combining evaporative cooling and mechanical refrigeration technology, the problems of high energy consumption and long cooling capacity transmission distance of the existing air conditioning system are solved, and efficient and energy-saving air conditioning effects are achieved, and are suitable for temperature needs in different seasons.
Patent Information
- Application Number
- CN202421687190.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The existing air conditioning systems have problems such as high energy consumption, long cooling capacity conveying distance, and large heat dissipation load in the distribution center environment, which is difficult to meet the energy saving and temperature requirements while achieving reasonable airflow organization.
The DC-type post air conditioning system is adopted to combine evaporative cooling with mechanical refrigeration technology, and mechanical refrigeration assisted evaporative cooling is used to cool. Through indirect and direct evaporative cooling sections, combined with air-cooled condenser and blower, efficient cooling and energy saving are achieved.
It achieves a reasonable and energy-saving and economical air conditioning effect on the premise of meeting temperature requirements, reduces energy consumption, is suitable for the high-temperature and humidity environment of the distribution station, and can be used for heating in winter.
Smart Images
Figure CN222911883U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air conditioning, in particular to a DC post air conditioning system for a power distribution station. Background Art
[0002] With the rapid increase in the number of large-scale distribution stations, higher requirements are placed on the energy consumption of air-conditioning systems. Ordinary mechanical refrigeration and air-conditioning do not meet the needs of energy-saving development. In addition, the heat dissipation load of distribution station equipment is large and concentrated, the indoor space is compact, and the air supply of the air-conditioning system is mostly arranged on the top. The cooling air cannot be directly sent to the heat source, resulting in a long cold transmission distance and large losses, which increases the energy consumption of the air-conditioning system. Therefore, it is urgent to propose an air-conditioning system that meets the temperature requirements, has reasonable airflow organization, and is energy-saving and economical. Utility Model Content
[0003] In view of the problems existing in the prior art, the utility model proposes a DC post air conditioning system for a power distribution station, which combines evaporative cooling with mechanical refrigeration technology. Mechanical refrigeration assists evaporative cooling to reduce the temperature, thereby achieving energy-saving effects.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] The utility model proposes a DC post air-conditioning system for a power distribution station, comprising an air-conditioning unit, wherein an air outlet end of the air-conditioning unit is connected with the interior of the power distribution station through a second air inlet at the lower end of a side wall of the power distribution station, a power distribution cabinet is arranged at intervals inside the power distribution station, an indoor air outlet is arranged on the top of the power distribution cabinet, an outdoor vent is arranged at the upper end of the power distribution station, the air-conditioning unit comprises a casing, a first air inlet is arranged at one end of the casing, and an air outlet is arranged at the other end, and a filtering section, an evaporative cooling section, a mechanical refrigeration section and a blower are arranged in sequence inside the casing from one end of the first air inlet to one end of the air outlet.
[0006] Specifically, the evaporative cooling section includes an indirect evaporative cooling section and a direct evaporative cooling section. The indirect evaporative cooling section is arranged between the mechanical refrigeration section and the filtering section, and the direct evaporative cooling section is arranged between the mechanical refrigeration section and the indirect evaporative cooling section.
[0007] Specifically, the indirect evaporative cooling section includes a heat exchange system, a third air inlet is arranged at the lower end of the heat exchange system, and a first spray system is arranged at the upper end.
[0008] Specifically, the direct evaporative cooling section includes a wet film, a second spray system is arranged above the wet film, and a water baffle is arranged on a side of the wet film close to an air outlet.
[0009] Specifically, the mechanical cooling section includes an evaporator, and the evaporator is circulatedly connected to the compressor and the air-cooled condenser through a refrigeration pipeline. The refrigeration pipeline between the air-cooled condenser and the evaporator is provided with a four-way valve. The air-cooled condenser is arranged above the first spray system, and an exhaust fan connected to the casing is arranged above the air-cooled condenser. The exhaust fan is located on the upper part of the casing, and the compressor is arranged between the direct evaporative cooling section and the evaporator.
[0010] Specifically, the second air inlet is a louver air inlet.
[0011] Specifically, the outdoor vent is a louver vent.
[0012] Specifically, a suspended ceiling is arranged on the top of the power distribution station, and an outdoor vent is arranged on the side wall of the outer wall of the suspended ceiling.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] (1) The utility model takes into account the indoor environment of the power distribution station. The indoor ambient temperature in summer should not be higher than 35-40°C, and the relative humidity should not exceed 70%. The temperature and humidity range is wide and relatively high. The indoor equipment does not dissipate moisture. It is approximately considered that the heat load is 100%. The air conditioner does not need to dehumidify the indoor environment, but only needs to cool it. The indoor temperature of the power distribution station is 35-40°C. It is not suitable to use the return air form. DC cooling is adopted. The utility model uses DC fresh air operation, which is suitable for the use of evaporative cooling technology for more than half of the year. The use of evaporative cooling can improve the energy saving of the system, making it an energy-saving and environmentally friendly green air conditioning system. The use of dry air can reduce carbon emissions, which is of great help to environmental protection.
[0015] (2) The utility model combines direct evaporative cooling with mechanical refrigeration. Mechanical refrigeration is used to assist in cooling in hot summer weather, which can reduce the air supply volume and the size of the unit. Mechanical refrigeration can be used for heating in cold winter areas to meet the requirement that the temperature of the distribution station be above 5°C in winter.
[0016] (3) The air-cooled condenser of the utility model is located above the spray system in the indirect evaporative cooling section, and can fully utilize the cold air after the spray system sprays heat exchange to cool the air-cooled condenser. The air-cooled condenser can also play a water barrier role to prevent water from floating when the air is discharged from the exhaust fan. The air-cooled condenser is arranged here to save the unit's floor space.
[0017] (4) The utility model utilizes the substation ceiling for exhaust. The indoor ambient temperature of the substation is 35-40°C, and the temperature difference between the supply and exhaust air is 15°C. The air can form a chimney effect between the ceiling and the ground. The indoor exhaust vent is arranged above the distribution cabinet. The indoor exhaust air is pushed into the ceiling by heat pressure. The path is short, the air flow interference is less, and the flow resistance is reduced. The second air inlet is arranged at a lower position, which has a displacement effect on the exhaust air at the top of the substation. The power consumption of the exhaust fan of the substation is reduced by the arrangement of the air inlet and exhaust vents, thereby achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Figure 2 This is a schematic diagram of the internal structure of the air conditioning unit of the utility model;
[0021] Figure numerals: 1. air conditioning unit, 101. casing, 1011. first air inlet, 1012. air outlet, 102. filtering section, 103. indirect evaporative cooling section, 1031. heat exchange system, 1032. third air inlet, 1033. first spray system, 104. direct evaporative cooling section, 1041. wet film, 1042. second spray system, 1043. water baffle, 105. compressor, 106. evaporator, 107. blower, 108. air-cooled condenser, 109. four-way valve, 110. exhaust fan, 2. power distribution station, 201. outdoor vent, 202. suspended ceiling, 3. power distribution cabinet, 301. indoor exhaust vent. DETAILED DESCRIPTION
[0022] The implementation scheme of the utility model will be described in detail below with reference to examples, but those skilled in the art will understand that the following examples are only used to illustrate the utility model and should not be regarded as limiting the scope of the utility model.
[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.
[0024] The following description sets forth specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0025] refer to Figure 1 and Figure 2 The present embodiment proposes a DC post air conditioning system for a power distribution station, comprising an air conditioning unit 1, wherein an air outlet end of the air conditioning unit 1 is connected to the inside of the power distribution station 2 through a second air inlet at the lower end of a side wall of the power distribution station 2, a power distribution cabinet 3 is arranged inside the power distribution station 2, an indoor exhaust outlet 301 is arranged on the top of the power distribution cabinet 3, and an outdoor vent 201 is arranged at the upper end of the power distribution station 2. The air conditioning unit 1 comprises a casing 101, wherein a first air inlet 1011 is arranged at one end of the casing 101, and an air outlet 1012 is arranged at the other end, and a filter section 102, an evaporative cooling section, a mechanical refrigeration section and a blower 107 are arranged in sequence inside the casing 1 from the first air inlet 1011 to the air outlet 1012.
[0026] In this embodiment, the process of the air-conditioning system of the power distribution station is as follows: outdoor fresh air first enters the air-conditioning unit 1 and is filtered through the filter section, and then cools the air through the evaporative cooling section and the mechanical cooling section in sequence. The air supply fan 107 sends the air that has passed through the mechanical cooling section into the power distribution station 2 through the second air inlet. Since the second air inlet is installed at a lower position, the cold air forms a cold lake after entering the power distribution station 2, and exchanges heat with the power distribution cabinet 3. An indoor exhaust port 301 is provided on the top of the power distribution cabinet 3. Since the hot air and the cold air in the power distribution cabinet 3 have a density difference, the thermal pressure naturally rises and is discharged through the indoor exhaust port 301. The hot air discharged from the indoor exhaust port 301 is then discharged into the atmosphere through the outdoor vent 201 provided at the upper end of the power distribution station 2. The evaporative cooling section and the mechanical cooling section of the air-conditioning unit 1 in this example can be opened and closed separately according to needs, with evaporative cooling as the main method and mechanical cooling as the auxiliary method, thereby achieving the purpose of energy saving.
[0027] refer to Figure 2 Specifically, the evaporative cooling section includes an indirect evaporative cooling section 103 and a direct evaporative cooling section 104. The indirect evaporative cooling section 103 is arranged between the mechanical refrigeration section and the filtration section 102, and the direct evaporative cooling section 103 is arranged between the mechanical refrigeration section and the indirect evaporative cooling section 103.
[0028] In the present embodiment, the indirect evaporative cooling section 103 and the direct evaporative cooling section 104 are fully opened in the summer. The air enters the indirect evaporative cooling section 103 and then passes through the direct evaporative cooling section 104 for isenthalpic cooling. In the extreme summer weather, when the indirect evaporative cooling section 103 and the direct evaporative cooling section 104 cannot cool down the temperature and humidity requirements of the substation 2, the mechanical cooling section can be opened to allow the air coming out of the direct evaporative cooling section 104 to continue to pass through the mechanical cooling section for dehumidification and cooling, thereby meeting the temperature requirements of the substation.
[0029] In the transition season, only the direct evaporative cooling section 104 or only the indirect evaporative cooling section 103 can be turned on for cooling. When the outdoor humidity is high, the humidification amount after the direct evaporative cooling section 104 is turned on is greater than the humidity range required by the power distribution station 2, then only the indirect evaporative cooling section 103 can be turned on. When the outdoor humidity is low, only the direct evaporative cooling section 104 can be turned on. The mechanical cooling section is not activated, and the full direct flow ventilation form is adopted.
[0030] In winter, the indoor temperature of Substation 2 is above 5°C, the indoor heat dissipation is large, and the demand for air conditioning is not very large. Only the mechanical cooling section can be turned on for heating.
[0031] refer to Figure 2 Specifically, the indirect evaporative cooling section 103 includes a heat exchange system 1031, a third air inlet 1032 is provided at the lower end of the heat exchange system 1031, and a first spray system 1033 is provided above the heat exchange system 1031. When the indirect evaporative cooling section needs to be closed, only the first spray system 1033 needs to be closed. The direct evaporative cooling section 104 includes a wet film 1041, a second spray system 1042 is provided above the wet film 1041, and a water baffle 1043 is provided on the side of the wet film 1041 close to the air outlet 1012. When the direct evaporative cooling section needs to be closed, only the second spray system 1042 needs to be closed. 2. The mechanical cooling section includes an evaporator 106, and the evaporator 106 is circulatedly connected with the compressor 105 and the air-cooled condenser 108 through a refrigeration pipeline. The refrigeration pipeline between the air-cooled condenser 108 and the evaporator 106 is provided with a four-way valve 109. The air-cooled condenser is arranged above the first spray system 1033. An exhaust fan 110 connected with the inside of the casing is arranged above the air-cooled condenser 108. The exhaust fan 110 is located at the upper part of the casing 1. The compressor is arranged between the direct evaporative cooling section and the evaporator 106. When the mechanical refrigeration section is turned on for cooling, the exhaust fan 110 is turned on.
[0032] In this embodiment, the heat exchange core of the heat exchange system 1031 is a vertical tube heat exchange core. Air enters the heat exchange system 1031 from the third air inlet 1032, and is further sprayed for heat exchange through the first spray system 1033. After the air in the heat exchange system 1031 is heat exchanged through the heat exchange core, it is vertically discharged from the upper end of the heat exchange system 1031 to cool the air-cooled condenser 108. The air entering from the first air inlet 1011 is filtered through the filter section 102, enters the heat exchange system 1031, and indirectly exchanges heat with the air entering the heat exchange system 1031 from the third air inlet 1032. After heat exchange, it enters the direct evaporative cooling section 104 horizontally for continuous cooling. The air entering the direct evaporative cooling section 104 can be further cooled through the wet film and then enter the mechanical cooling section. The air entering the mechanical cooling section can enter the evaporator to continue to be heated.
[0033] In extreme summer weather, when the indirect evaporative cooling section 103, the direct evaporative cooling section 104 and the mechanical cold end are all opened for cooling, the air coming out of the indirect evaporative cooling section 103 can lower the temperature of the air-cooled condenser 108, and the refrigerant coming out of the compressor returns to the evaporator 106 for heat exchange through the four-way valve 109, and the air entering from the third air inlet 1032 exchanges heat with the air-cooled condenser 108 and is discharged through the exhaust fan 110.
[0034] In winter, the indoor heat dissipation is large, so the mechanical cooling section can be turned on for heating. The evaporator 106 heats the air filtered by the filter section 102 through the four-way valve 109 to reach the temperature required by the power distribution station 2.
[0035] In the above embodiments, the second air inlet is preferably a louver air inlet, and the outdoor vent 201 is preferably a louver vent, which can improve ventilation efficiency.
[0036] refer to Figure 1 In the above embodiment, a suspended ceiling 202 is arranged on the top of the substation 2, an outdoor vent 201 is arranged on the outer wall side of the suspended ceiling 202, a second air inlet is arranged at the lower end of the substation 2, and the outdoor vent 201 is arranged at the upper end of the substation 2. The hot air in the substation 2 gathers at the suspended ceiling 202 to form heat pressure and is naturally discharged from the outdoor vent 201, thereby reducing the power consumption of the exhaust fan of the substation 2 and achieving the purpose of energy saving.
[0037] Although the utility model has been described in detail in this specification with general descriptions and specific implementation schemes, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model based on the utility model. Therefore, these modifications or improvements made without departing from the utility model are within the scope of protection claimed by the utility model.
Claims
1. A DC post air conditioning system for a power distribution station, characterized in that: The invention comprises an air conditioning unit (1), wherein the air outlet of the air conditioning unit (1) is connected to the inside of the power distribution station (2) through a second air inlet at the lower end of the side wall of the power distribution station (2), a power distribution cabinet (3) is arranged at an interval inside the power distribution station (2), an indoor air outlet (301) is arranged on the top of the power distribution cabinet (3), and an outdoor air outlet (201) is arranged on the upper end of the power distribution station (2). The air conditioning unit (1) comprises a casing (101), wherein one end of the casing (101) is provided with a first air inlet (1011), and the other end is provided with an air outlet (1012), and the inside of the casing (101) is provided with a filtering section (102), an evaporative cooling section, a mechanical refrigeration section and a blower (107) in sequence from one end of the first air inlet (1011) to one end of the air outlet (1012).
2. A DC post air conditioning system for a power distribution station according to claim 1, characterized in that: The evaporative cooling section comprises an indirect evaporative cooling section (103) and a direct evaporative cooling section (104); the indirect evaporative cooling section (103) is arranged between the mechanical refrigeration section and the filtering section (102); and the direct evaporative cooling section (104) is arranged between the mechanical refrigeration section and the indirect evaporative cooling section (103).
3. A DC post air conditioning system for a power distribution station according to claim 2, characterized in that: The indirect evaporative cooling section (103) comprises a heat exchange system (1031), wherein a third air inlet (1032) is arranged at the lower end of the heat exchange system (1031), and a first spray system (1033) is arranged at the upper end.
4. A DC post air conditioning system for a power distribution station according to claim 2, characterized in that: The direct evaporative cooling section (104) comprises a wet film (1041), a second spray system (1042) is arranged above the wet film (1041), and a water baffle (1043) is arranged on the side of the wet film (1041) close to the air outlet (1012).
5. A DC post air conditioning system for a power distribution station according to claim 3, characterized in that: The mechanical refrigeration section comprises an evaporator (106), the evaporator (106) is cyclically connected to the compressor (105) and the air-cooled condenser (108) via a refrigeration pipeline, the refrigeration pipeline between the air-cooled condenser (108) and the evaporator (106) is provided with a four-way valve (109), the air-cooled condenser is arranged above the first spray system (1033), an exhaust fan (110) connected to the inside of the casing is arranged above the air-cooled condenser (108), the exhaust fan (110) is located at the upper part of the casing (101), and the compressor is arranged between the direct evaporative cooling section and the evaporator (106).
6. A DC post air conditioning system for a power distribution station according to claim 1, characterized in that: The second air inlet is a louver air inlet.
7. A DC post air conditioning system for a power distribution station according to claim 1, characterized in that: The outdoor vent (201) is a louver vent.
8. A DC post air conditioning system for a power distribution station according to claim 1, characterized in that: The power distribution station (2) is provided with a suspended ceiling (202) on the top, and an outdoor vent (201) is provided on the side wall of the outer wall of the suspended ceiling (202).