Temperature and humidity separate control integrated air conditioning unit special for archival repository

Abstract

The utility model discloses a temperature and humidity separate control integrated air conditioning unit special for an archival repository. The temperature and humidity separate control integrated air conditioning unit comprises a temperature control channel, a humidity control channel, a heat dissipation channel and an energy recovery device. The temperature control channel is connected with a return air inlet and an air supply outlet of the unit and is internally provided with a filter, a surface air cooler and an air feeder; the humidity control channel is connected with a unit fresh air opening, a built-in surface air cooler, a humidifier, an evaporator, a condenser and a fresh air machine. The heat dissipation channel is connected with the unit exhaust outlet and internally provided with a compressor, a condenser and an exhaust fan. The energy recovery device is connected with the return air inlet and the fresh air inlet. According to the unit, the air temperature and humidity are separately controlled through the double-cold-source deep dehumidification and dry-type temperature adjustment combined technology, a temperature control channel only treats sensible heat loads, fresh air is deeply dehumidified through a first-stage high-temperature cold source of the humidity control channel and a second-stage evaporator, and the purpose of saving energy is achieved through reheating of a built-in condenser; and meanwhile, the unit is automatically adjusted to operate by adopting the minimum fresh air volume according to the indoor pollutant concentration. The unit can ensure safe and stable operation of an archival repository air conditioner and reduce system energy consumption.

Description

Technical Field

[0001] The utility model relates to an air-conditioning device for an archive storehouse, in particular to an air-conditioning device for an archive storehouse with temperature and humidity separate control, double cold sources, deep dehumidification and integrated operation. Background Art

[0002] Existing archive warehouses usually use solution humidification air conditioning, that is, the air conditioning unit uses an inorganic salt solution with humidification function (such as lithium bromide, calcium chloride, etc.) as the working medium, and uses the moisture absorption and dehumidification characteristics of the solution to control the air humidity. Chapter 22.9 of the "Practical Heating and Air Conditioning Design Manual (Volume 2)" has a relatively detailed explanation of the working principle of solution dehumidification air conditioning: the solution dehumidification process relies on the pressure difference between the partial pressure of water vapor in the treated air and the saturated vapor partial pressure on the surface of the dehumidification solution as the driving force for mass transfer, and the dehumidification performance of the dehumidification solution is measured by the size of its surface vapor pressure. Since the pressure difference between the water vapor partial pressure of the treated air and the surface vapor pressure of the dehumidification solution is the driving force for the transfer of moisture from the air to the dehumidification solution, the lower the surface vapor pressure of the dehumidification solution, the stronger the dehumidification capacity of the solution under the same treatment conditions, and the lower the relative humidity of the humid air when it reaches equilibrium with the air it contacts. This method of using the physical properties of salt solution to achieve air humidification through water vapor partial pressure difference has certain defects. When the temperature and humidity of the treated air are low, the reduction of water vapor partial pressure difference will reduce the dehumidification capacity and increase the dehumidification energy consumption. Since the heat and humidity load of the archive warehouse other than the fresh air is very small, and the amount of fresh air required to ensure the concentration index of air pollutants inside the warehouse is very small, the temperature and humidity of the air after the fresh air and return air are mixed are relatively low, and the dehumidification efficiency of the solution will be reduced. Secondly, the fresh air volume of the solution dehumidification air conditioner must meet the temperature and humidity requirements of the treated air at the same time, and cannot be adjusted in real time according to the terminal fresh air volume requirements. The total fresh air volume of the system is large, and the energy consumption of the fresh air treatment process is high. In addition, the dehumidification medium used by the solution dehumidification air conditioner is mainly salt solutions such as lithium bromide and calcium chloride, which are corrosive to a certain extent. The treated air is in direct contact with the salt solution, and improper splash prevention measures may cause the risk of liquid being sent into the air conditioning area. "Archive Air Conditioning System Design Specifications" DA / T87-2021 stipulates: "The dehumidification of ground archive warehouses should use refrigeration dehumidification, and chemical reagents (containing corrosive substances) should not be used to absorb moisture." In addition, some archive warehouses use low-temperature refrigeration dehumidification air-conditioning systems. The air needs to be deeply dehumidified and then reheated. The reheating load increases the system energy consumption. Summary of the invention

[0003] In order to solve the defects of small heat and humidity load of existing archive warehouses, high energy consumption of solution air conditioning, large fresh air volume, corrosive regeneration medium, and low-temperature refrigeration dehumidification air conditioning that needs to increase reheat load, a temperature and humidity separate control integrated air-conditioning unit specially provided for archive warehouses is provided. The temperature and humidity of the warehouse are separately controlled through the dual cold source deep dehumidification and dry temperature control combination technology. The fresh air side bears the system wet load, and the dry temperature control side bears the system cold and hot load. The air is deeply frozen and dehumidified by the first-level high-temperature cold source and the second-level evaporator on the fresh air side, and the low-temperature air is reheated by the built-in condenser, so as to achieve energy saving and ensure the safety of archive storage. At the same time, the fresh air volume is automatically adjusted by using the indoor pollutant concentration and humidity, and the minimum fresh air volume is used to reduce system energy consumption.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a temperature and humidity separate control integrated air-conditioning unit specially used for archive warehouses, comprising a first channel, a second channel, and a third channel. The first channel and the second channel share a supply air outlet, the first channel and the third channel share a return air outlet, the second channel is connected to the fresh air outlet, the third channel is connected to the exhaust outlet, and an energy recovery device is arranged between the entrances of the second channel and the third channel.

[0005] The above-mentioned integrated temperature and humidity control air-conditioning unit specially used for archive warehouse has a first filter connected to the inside of the return air outlet. Most of the return air is diverted to the first channel after filtering, and a small part is diverted to the third channel after passing through the energy recovery device.

[0006] The above-mentioned integrated temperature and humidity control air conditioning unit for archive warehouses has a first channel as a temperature control channel, which is used for air cooling and heating, and has a built-in temperature control surface cooler and air blower. The return air outlet is connected to the first filter, and after being adjusted in temperature by the temperature control surface cooler, it is mixed with the treated fresh air and sent into the room by the air blower.

[0007] The above-mentioned integrated temperature and humidity control air conditioning unit for archive warehouses has a second channel as a humidity control channel, which is used for air dehumidification and humidification, and has a built-in dehumidifier cooler, humidifier, evaporator, reheat condenser, and fresh air fan. The fresh air outlet is connected to the second filter, and enters the second channel after passing through the energy recovery device. In summer, it is sent to the first channel after the first-level treatment of the dehumidifier cooler, the second-level deep dehumidification of the evaporator, and the reheating of the reheat condenser. In winter, it is heated by the dehumidifier cooler and humidified by the humidifier and then sent to the first channel by the fresh air fan.

[0008] The above-mentioned integrated temperature and humidity control air-conditioning unit specially used for archive warehouses has the third channel as the exhaust and heat dissipation channel, which is used for indoor ventilation and discharge of waste heat from the condenser in summer. It has a built-in compressor, waste heat condenser and exhaust fan. The return air is recovered by the energy recovery device, and then it absorbs the waste heat from the condenser in summer and is discharged to the outside through the exhaust fan. In winter, it is directly discharged to the outside through the exhaust fan.

[0009] The fresh air fan and exhaust fan are both EC intelligent energy-saving fans, which realize stepless frequency conversion speed regulation and automatically adjust the fresh air volume and exhaust air volume of the unit according to the indoor pollutant concentration.

[0010] The air supply fan is a high-efficiency fixed-frequency centrifugal fan to ensure the stability of the internal system of the warehouse.

[0011] The first filter inside the return air outlet is a primary-efficiency plate filter plus a medium-efficiency bag filter, and the second filter inside the fresh air outlet is a primary-efficiency plate filter plus a high-efficiency bag filter, and the PM2.5 filtration efficiency reaches 99%.

[0012] The energy recovery device is a high-efficiency plate heat exchanger with a sensible heat recovery efficiency greater than 65%.

[0013] The temperature-controlled cooler and dehumidifying cooler both use a copper tube-in-aluminum fin structure to cool the air in summer and heat the air in winter. A 14 / 19℃ high-temperature cold source is used in summer and a 50 / 40℃ heat source is used in winter. A condensate collection tray is set at the bottom of the cooler, and a cold and hot source and condensate interface are reserved on one side of the unit.

[0014] The humidifier adopts a high-pressure micro-mist humidifier to achieve precise control of air humidity in winter.

[0015] The evaporator adopts a high-efficiency copper fin heat exchanger, and the condenser adopts a multi-stage condenser combination of a reheat condenser and a waste heat condenser, with the reheat condenser being the priority. The compressor adopts a fully enclosed scroll compressor, connecting the condenser and the evaporator. A condensate collection pan is set at the bottom of the evaporator, and a condensate interface is reserved on one side of the unit.

[0016] The air conditioning unit adopts a standard modular design, 1 module = 100mm, corresponding to the standard filter size. Each internal functional section adopts a modular design to correspond to different air volume requirements. The air conditioning box adopts a 25 / 50mm composite panel, with color steel plates on both sides and polyurethane foam sandwiched inside. The outer frame of the box adopts a high-strength aluminum alloy profile frame, which is connected by a high-strength nylon triangle connector. The unit panel, internal functional sections and unit frame adopt an embedded assembly structure, which is convenient for disassembly and maintenance and ensures the air tightness of the box.

[0017] The air conditioning unit is equipped with 8 temperature testers, 5 humidity testers, 2 sets of filter pressure difference detectors, and 2 air quality testers, all of which are connected to the unit's intelligent control box. The control box simultaneously controls the humidifier, evaporator, reheat condenser solenoid valve, and the surface cooler inlet electric valve, which can realize automatic control of various parameters of the unit. The control box reserves an RS485 communication interface. The control box unit is external.

[0018] The above-mentioned integrated temperature and humidity control air conditioning unit for archive warehouse has at least the following beneficial effects:

[0019] 1. The utility model of the temperature and humidity control integrated air conditioning unit for archive warehouses controls the temperature and humidity of the warehouse separately. The first channel processes the air temperature, and the second channel processes the fresh air humidity. The air temperature is processed by freezing / heating. In summer, the step-freezing dehumidification technology is used to heat the reheat condenser, and in winter, the heating and humidification method is used to process the air humidity. Compared with liquid dehumidification air conditioners, the closer the temperature and humidity of the return air and fresh air of this unit are to the indoor parameters, the more energy-saving it is, and the energy consumption of the direct air processing process of freezing dehumidification / heating is lower.

[0020] 2. The utility model of the temperature and humidity control integrated air conditioning unit for archive warehouses has a fresh air volume that is only related to the indoor air pollutant concentration and humidity, and has nothing to do with other contents. The fresh air volume of the unit can be directly adjusted according to the indoor air pollutant concentration and humidity parameters. The fresh air fan adopts stepless frequency conversion regulation to ensure that the unit is always in the minimum fresh air volume state. Compared with liquid dehumidification air conditioners, this unit can effectively reduce the total fresh air volume of the system throughout the year and reduce annual energy consumption.

[0021] 3. The temperature and humidity control integrated air conditioning unit for archive warehouses of the utility model adopts refrigeration to adjust temperature and humidity. Compared with solution air conditioning, this unit does not contain chemical reagents and salt solutions that pollute or corrode the treated air.

[0022] 4. The utility model of the temperature and humidity control integrated air conditioning unit for archive warehouses, after the summer fresh air is dehumidified by dual cold source cascade, is directly heated to the air supply state point by the built-in reheat condenser in the channel. Compared with low-temperature refrigeration dehumidification, this unit uses a high-temperature cold source and does not need to set up an additional reheat heat source, with obvious energy-saving effect.

[0023] 5. The above effects reduce the total fresh air volume of the system, avoid the fresh air reheating load, and fundamentally reduce the air conditioning load of the archive warehouse. The safe storage of archives is guaranteed and it is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting part of the specification of this application are used to provide a further understanding of the application. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation on the utility model. In the drawings:

[0025] Figure 1 It is a schematic diagram of the utility model;

[0026] Figure 2 This is a schematic diagram of Example 1;

[0027] Figure 3 This is a schematic diagram of Example 2;

[0028] Figure 4 is a schematic diagram of the structure of the first channel;

[0029] Figure 5 is a schematic diagram of the second channel structure;

[0030] Figure 6 is a schematic diagram of the structure of the third channel;

[0031] In the figure, 101. return air outlet, 102. maintenance channel, 103. first filter, 104. temperature-controlled surface cooler, 105. supply fan, 106. flow equalization section, 107. supply air outlet, 108. connecting port, 109. dehumidification surface cooler, 110. humidifier, 111. evaporator, 112. reheat condenser, 113. fresh air fan, 114. fresh air outlet, 115. second filter, 116. compressor, 117. waste heat condenser, 118. exhaust fan, 119. exhaust outlet, 2. energy recovery device, 3. air quality detector, 4. temperature detector, 5. humidity detector, 6. pressure difference detector. DETAILED DESCRIPTION

[0032] [Example 1]

[0033] The temperature and humidity control integrated air conditioning unit for archive warehouses includes three parts: upper, middle and lower parts, which correspond to the first channel, second channel and third channel of the unit respectively. The first channel in the upper part is a temperature control channel, which is connected to the return air port 101 and the air supply port 107. The return air of the room enters the internal inspection channel 102 of the channel from the return air port 101, and after being filtered and dusted by the first filter 103, it is diverted in the inspection channel 102. A small part enters the third channel through the first channel and the third channel connecting port 108, and most of it enters the inspection channel 102 after being cooled / heated by the temperature control cooler 104, and is mixed with the fresh air entering the first channel and the second channel connecting port 108, and then is sent into the air-conditioned room by the air blower 105 through the flow equalization section 106 and the air supply port 107. The second channel in the middle is a humidity control channel, which is connected to the fresh air outlet 114 of the unit. The outdoor fresh air enters the maintenance channel 102 from the fresh air outlet 114, is filtered and dust-removed by the second filter 115, and then enters the maintenance channel 102 after energy exchange with the return air through the energy recovery device 2. In summer, the fresh air is dehumidified and cooled by the dehumidifier cooler 109, deeply cooled and dehumidified by the evaporator 111, and then heated to the air supply state point by the reheat condenser 112. In winter, the fresh air is heated by the dehumidifier cooler 109 and humidified to the air supply state point by the humidifier 110, and then sent into the first channel through the first channel and the second channel connecting port 108 through the fresh air fan 113. The third channel at the bottom is an exhaust and heat dissipation channel, connected to the exhaust port 119. The return air of the unit enters the third channel maintenance channel 102 through the first channel and the third channel connecting port 108, and enters the maintenance channel 102 after energy exchange with the fresh air through the energy recovery device 2. In summer, the excess heat of the unit is taken away by the waste heat condenser 117 and discharged to the outside through the exhaust port 119 through the exhaust fan 118. The built-in compressor 116 of the unit is set inside the maintenance channel 102. The unit monitors the return air parameters, supply air parameters, and outdoor fresh air parameters of the unit in real time through the air quality tester 3, temperature tester 4, humidity tester 5, and pressure difference detector 6 set in each functional section of the unit, and automatically adjusts the operating status of the unit. Except for the necessary connecting port 108, each channel is strictly separated by a partition. The air-conditioning cabinet adopts 25 / 50mm composite panel, and the outer frame of the cabinet adopts high-strength aluminum alloy profile frame, which is connected by high-strength nylon triangle connectors. The unit panel, internal functional sections and unit frame adopt embedded assembly structure, which is convenient for disassembly and maintenance and ensures the air tightness of the cabinet.

[0034] [Example 2]

[0035] The air conditioning unit structure can also be divided into a left and right structure, including three parts: left, upper right, and lower right, corresponding to the first channel, second channel, and third channel of the unit respectively. There is no obvious difference in the air flow streamlines and processing methods of each channel. The height of the first channel on the left is consistent with the total height of the second and third channels on the right. Except for the necessary connecting ports 108, each channel is strictly separated by a partition. The height of the air conditioning unit is reduced and the width is increased.

Claims

1. The temperature and humidity control integrated air conditioning unit for archive warehouse is characterized by The air conditioner comprises three parts: an upper part, a middle part and a lower part, which respectively correspond to the first channel, the second channel and the third channel of the unit. The first channel is a temperature control channel, which only processes the sensible heat load of the air conditioner and is used for air cooling and heating. The first channel is built-in with a first filter (103), a temperature control surface cooler (104) and a blower (105), and is connected to a return air port (101) and an air supply port (107). The second channel is a humidity control channel, which processes the humidity load of the fresh air and is used for air dehumidification and humidification. The second channel is built-in with a second filter (115), a dehumidification surface cooler (109), a humidifier (110), an evaporator (1115) and a humidifier (1110). 1), a reheat condenser (112), and a fresh air fan (113), connected to a fresh air outlet (114); the third channel is an exhaust and heat dissipation channel, used for indoor ventilation and discharging summer condenser waste heat, with a built-in compressor (116), a waste heat condenser (117), and an exhaust fan (118), connected to a return air outlet (101) and an exhaust outlet (119); an energy recovery device (2) is arranged between the entrances of the second channel and the third channel; a connecting port (108) is arranged between the first channel and the second channel, and a connecting port (108) is arranged between the first channel and the third channel.

2. The temperature and humidity control integrated air conditioning unit for archive warehouse according to claim 1 is characterized in that the upper The return air from the first channel enters the maintenance channel (102) inside the channel through the return air port (101), is filtered and dust-removed by the first filter (103), and is then divided in the maintenance channel (102). Part of the air enters the third channel through the connecting port (108) between the first channel and the third channel, and part of the air is cooled / heated by the temperature-controlled cooler (104). The air is mixed with the fresh air entering through the connecting port (108) between the first channel and the second channel, and is then delivered into the room by the air supply fan (105) through the flow balancing section (106) and the air supply port (107).

3. The temperature and humidity control integrated air conditioning unit for archive warehouse according to claim 1 is characterized in that Fresh air from the second channel in the middle enters the inspection channel (102) through the fresh air inlet (114), is filtered and dusted through the second filter (115), and enters the inspection channel (102) after energy exchange with the return air through the energy recovery device (2). In summer, the fresh air is first-stage dehumidified and cooled by the dehumidifier cooler (109), then deeply cooled and dehumidified by the evaporator (111), and then heated to the air supply state point by the reheat condenser (112). In winter, the fresh air is heated by the dehumidifier cooler (109), humidified by the humidifier (110) to the air supply state point, and then sent into the first channel through the first channel and the second channel connecting port (108) through the fresh air fan (113).

4. The temperature and humidity control integrated air conditioning unit for archive warehouse according to claim 1 is characterized in that The return air from the lower third channel enters the third channel inspection channel (102) through the connecting port (108) between the first channel and the third channel, and enters the inspection channel (102) after energy exchange with the fresh air through the energy recovery device (2). In summer, the return air is heated by the waste heat condenser (117) to take away the excess heat of the unit, and is discharged to the outside through the exhaust fan (118) and the exhaust port (119). The built-in compressor (116) of the unit is arranged inside the inspection channel (102).

5. The temperature and humidity control integrated air conditioning unit for archive warehouse according to claim 1 is characterized in that The unit monitors the return air parameters, supply air parameters and outdoor fresh air parameters of the unit in real time through the air quality tester (3), temperature tester (4), humidity tester (5) and pressure difference detector (6) installed in each functional section of the unit, and automatically adjusts the operating status of the unit.

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