All fresh air radiation air conditioning system tail end dehumidification equipment

Abstract

The utility model provides full fresh air radiation air conditioning system tail end dehumidification equipment which comprises a front section pre-dehumidification system and a tail end self-adaptive dehumidification system. The front-section pre-dehumidification system comprises a fresh air unit used for conveying fresh air to the radiation tail end through a fresh air main pipeline; the heat exchange unit is connected with the fresh air unit and is used for carrying out pre-dehumidification heat exchange on the fresh air fed into the radiation tail end; the tail end self-adaptive dehumidification system comprises a tail end dehumidification unit arranged at the radiation tail end and used for dehumidifying indoor high-humidity air; and the dehumidification discharge unit is used for being communicated with the exhaust vertical pipe and releasing the dehumidification condensate water. According to the full fresh air radiation air conditioning system tail end dehumidification equipment and the control method thereof, through the dehumidification scheme of front end pre-dehumidification and tail end self-adaptive dehumidification and the dehumidification condensate water cooling capacity recovery method, the operation energy consumption of the system can be further reduced, and the effect on the area with the large wet load is better.

Description

Technical Field

[0001] The present invention belongs to the technical field of radiation air conditioning, and in particular relates to a terminal dehumidification device of a fresh air radiation air conditioning system and a control method thereof. Background Art

[0002] Radiant air conditioners are accepted by more and more people for their high energy efficiency and good comfort, and their current market usage is also increasing year by year. The operating effect is good in the dry areas in the north in summer, but in the hot and humid south, radiant air conditioners have been criticized for a long time due to the condensation problem. At present, most radiant air conditioners used in the south are used with dehumidification systems. Through efficient dehumidification, the indoor air dew point is controlled above the temperature of the radiation panel surface to solve the condensation problem and ensure its normal operation under high humidity conditions in summer. However, the matching dehumidification system (fresh air dehumidification, terminal dehumidification, etc.) often needs to control the indoor moisture content at around 11g / kg, or even lower. Such deep dehumidification also further increases the overall energy consumption of the system, making the energy-saving effect of radiant air conditioners, which are famous for their high energy efficiency, far lower than expected in actual operation, especially under fresh air operation conditions. Therefore, how to further improve energy efficiency is very important for expanding the application of radiant air conditioners in the southern market.

[0003] In order to improve the operating energy efficiency of the fresh air radiation air conditioning system, the current common practice is to recover the exhaust waste heat, and the waste heat recovery equipment is mostly a split heat recovery solution based on liquid air conditioning. However, the above-mentioned split waste heat recovery solution still has the following problems: 1. Because fresh air is often used in places with a higher purification level, the exhaust port needs to be far away from the fresh air collection port, which makes the distance between the fresh air main duct and the exhaust main duct relatively far, and it is not easy to set up an integrated heat recovery device; 2. In the existing radiation air conditioning system, the radiation terminal only solves the terminal waste heat, and the residual moisture often needs to pass through. Its energy-saving performance is not good, and it cannot adapt to different terminal load requirements. This paper proposes a dehumidification condensation water cooling recovery method under the fresh air radiation air conditioning system, which can further reduce the operating energy consumption of the system, and is more effective for areas with larger wet loads. Utility Model Content

[0004] The utility model provides a terminal dehumidification device for a fresh air radiation air-conditioning system, which can further reduce the operating energy consumption of the system through a dehumidification scheme of front-end pre-dehumidification and terminal adaptive dehumidification, as well as a dehumidification condensed water cooling recovery method. It is more effective in areas with a larger wet load, thereby overcoming the above-mentioned shortcomings of the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] The utility model provides a terminal dehumidification device for a fresh air radiation air conditioning system, including a front-end pre-dehumidification system and a terminal adaptive dehumidification system;

[0007] The front-end pre-dehumidification system includes: a fresh air unit, which is used to deliver fresh air to the radiation terminal through the fresh air main pipeline; a heat exchange unit connected to the fresh air unit, which is used to perform pre-dehumidification and heat exchange on the fresh air delivered to the radiation terminal;

[0008] The terminal adaptive dehumidification system comprises: a terminal dehumidification unit, which is arranged at the radiation end and is used to dehumidify the indoor high-humidity air; and a dehumidification discharge unit, which is used to connect to the exhaust riser and release the dehumidified condensed water.

[0009] In some embodiments, the fresh air unit includes: a fresh air fan, an exhaust fan, a first heat exchanger, a second heat exchanger, and an intercooler heat exchanger;

[0010] The fresh air fan comprises a filter section, a surface cooling section, a reheat section and a fan section which are arranged in sequence; the first heat exchanger is arranged at the front end of the filter section, and the fan section is connected to the fresh air main duct;

[0011] The second heat exchanger is arranged at the front end of the exhaust fan, and the exhaust fan is connected to the exhaust main duct;

[0012] The intercooler heat exchanger is connected to the surface cooling section through a fresh air condensate water pipeline, and is connected to the exhaust main pipeline through a main condensate water pipeline; the first heat exchanger, the second heat exchanger and the intercooler heat exchanger are connected in sequence through a heat medium exchange pipeline.

[0013] In some embodiments, the terminal dehumidification unit comprises:

[0014] A terminal dehumidification coil and a power fan arranged at the rear end of the terminal dehumidification coil; the power fan is used to extract high-humidity air and make the high-humidity air pass through the terminal dehumidification coil; the terminal dehumidification coil is used to dehumidify the high-humidity air.

[0015] In some embodiments, the dehumidification discharge unit includes: a water receiving tray and a water pump disposed in the water receiving tray;

[0016] The water receiving pan is arranged below the terminal dehumidification coil for receiving dehumidification condensed water; the water pump is connected to the terminal condensed water pipeline through the water pump water receiving pipe for discharging the dehumidification condensed water through the terminal condensed water pipeline to the exhaust riser.

[0017] In some embodiments, a scale line is provided on one side of the water receiving tray, and the bottom surface of the water receiving tray is inclined.

[0018] In some embodiments, a sprinkler head is provided at one end of the terminal condensate pipe placed in the exhaust riser.

[0019] In some embodiments, the terminal adaptive dehumidification system also includes a four-way control proportional integral valve; the four valves of the four-way control proportional integral valve are respectively connected to the cold water supply pipe, the cold return water pipe, the radiation top plate and the terminal dehumidification unit, and the four-way control proportional integral valve can adjust the water supply ratio obtained by the terminal dehumidification unit from the cold water supply pipe and the radiation top plate.

[0020] The beneficial effects of this application are:

[0021] The terminal dehumidification equipment of a new air radiation air-conditioning system provided in the present application has the following beneficial effects: 1. When the condensed water passes through the terminal, the cold energy can be utilized in the exhaust air nearby, thus avoiding the problems of multiple and complex terminals, different working conditions and increased pipeline costs in the utilization of centralized terminal condensed water; 2. The condensed water in the pre-dehumidification process can be reused through the intercooler heat exchanger (to improve the exhaust heat recovery efficiency) and the sprinkler head, thereby improving the energy efficiency of the entire control system through the simple principle of nearby utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the front-end pre-dehumidification system of this application;

[0023] Figure 2 This is a schematic diagram of the terminal adaptive dehumidification system of this application;

[0024] Figure 3 This is a schematic diagram of the terminal dehumidification unit of the present application;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0026] Description of reference numerals:

[0027] Fresh air fan-1; exhaust air fan-2; first heat exchanger-3; second heat exchanger-4; intercooler heat exchanger-5; filter section-11; surface cooling section-12; reheat section-13; fan section-14; fresh air main pipeline-21; exhaust air main pipeline-22; heat medium exchange pipeline-23; fresh air condensate pipeline-30; main condensate pipeline-31; terminal condensate pipeline-32; air supply port-100; exhaust port-101; exhaust riser-102; radiation top plate-103; terminal dehumidification unit-104; sprinkler head-105; power fan-200; terminal dehumidification coil-205; water receiving tray-206; water pump-208; water pump water receiving pipe-209; scale line-210. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0029] In order to more clearly understand the above-mentioned purpose, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It is to be understood that the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The specific embodiments described herein are merely used to explain the present application, rather than to limit the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0030] It should be noted that, in this document, relational terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0031] Combination Figure 1 as well as Figure 2 That is, the schematic diagram of the front-end pre-dehumidification system and the terminal adaptive dehumidification system of the present application. The first aspect of the present application provides a terminal dehumidification device of a fresh air radiation air conditioning system, including a front-end pre-dehumidification system and a terminal adaptive dehumidification system;

[0032] The front-end pre-dehumidification system includes: a fresh air unit for delivering fresh air to the radiation terminal through the fresh air main pipeline 21; a heat exchange unit connected to the fresh air unit for pre-dehumidifying and heat exchanging the fresh air delivered to the radiation terminal;

[0033] The terminal adaptive dehumidification system includes: a terminal dehumidification unit 104, which is arranged at the radiation end and is used to dehumidify the indoor high-humidity air; a dehumidification discharge unit, which is used to connect to the exhaust riser 102 and release the dehumidified condensed water.

[0034] In some embodiments, the fresh air unit includes: a fresh air fan 1, an exhaust fan 2, a first heat exchanger 3, a second heat exchanger 4 and an intercooler heat exchanger 5;

[0035] The fresh air fan 1 comprises a filter section 11, a surface cooling section 12, a reheat section 13 and a fan section 14 which are arranged in sequence; the first heat exchanger 3 is arranged at the front end of the filter section 11, and the fan section 14 is connected to the fresh air main duct 21;

[0036] The second heat exchanger 4 is disposed at the front end of the exhaust fan 2, and the exhaust fan 2 is connected to the exhaust main duct 22;

[0037] The intercooler heat exchanger 5 is connected to the surface cooling section 12 through the fresh air condensate water pipeline 30, and is connected to the exhaust main pipeline 22 through the main condensate water pipeline 31; the first heat exchanger 3, the second heat exchanger 4 and the intercooler heat exchanger 5 are connected in sequence through the heat medium exchange pipeline 23.

[0038] Specifically, this scheme proposes a dehumidification condensation water cooling capacity recovery method under the fresh air radiation air conditioning system, which can further reduce the operating energy consumption of the system, and has better effects for areas with large wet loads; in the radiation air conditioning system, the radiation terminal only solves the terminal waste heat, and the residual humidity often needs to be calculated separately. Compared with the front-end concentrated one-time deep dehumidification of fresh air, the front-end pre-dehumidification + terminal adaptive dehumidification scheme is more energy-efficient and adaptable to different terminal load requirements; therefore, the use of this scheme is based on the premise of front-end pre-dehumidification + terminal adaptive dehumidification, and adopts a fresh air cycle, taking a summer outdoor 35℃ / 70% working condition as an example:

[0039] The fresh air passes through the first heat exchanger 3 and is pre-cooled to 30℃ / 92%. It is then processed to 22℃ / 62% through the filter section 11, the surface cooler 12, the reheat section 13 and the fan section 14 in the fresh air fan 1. It is then sent to the end of each room in turn through the fresh air main duct 21. It then enters the exhaust main duct 22 with the residual heat and humidity in the room at 26℃ / 55%. The condensed water generated by the residual moisture at the end of the treatment room is sprayed into the exhaust duct through the end condensed water pipe 32, and the exhaust air temperature is reduced by 1-2℃ to 24℃ / 75%. After being collected, the condensed water generated by the pre-cooling coil of the fresh air fan 1 is sprayed again in the exhaust main pipe 22, and the exhaust air temperature is further reduced by 2-3℃ to 22℃ / 90%. Finally, heat exchange is carried out with 35℃ / 70% fresh air at this operating point (through the first heat exchanger 3 and the second heat exchanger 4), and is discharged into the atmosphere at about 27℃ / 66% after treatment; compared with direct heat recovery of the exhaust air, the exhaust air heat recovery after double cooling of the condensed water can increase the heat exchange temperature difference by 4-5℃, greatly improving the efficiency of heat recovery.

[0040] In addition, after the fresh air is pre-dehumidified, the condensed water in the intercooler heat exchanger 5 supplements the heat exchange and cooling of the medium from the second heat exchanger 4 in the heat recovery system, thereby improving the pre-cooling effect of the first heat exchanger 3 on the fresh air; the condensed water after heat exchange is sprayed into the exhaust main duct 22 through the main condensed water pipeline 31, so that the exhaust air can be cooled while the cooling capacity of the condensed water is reused for the second time, thereby increasing the heat exchange temperature difference in the second heat exchanger 4 and thus improving the heat exchange efficiency.

[0041] In some embodiments, in combination Figure 2 That is, a schematic diagram of a terminal adaptive dehumidification system, wherein the terminal dehumidification unit 104 includes:

[0042] The terminal dehumidification coil 205 and the powered fan 200 arranged at the rear end of the terminal dehumidification coil 205; the powered fan 200 is used to extract high-humidity air and make the high-humidity air pass through the terminal dehumidification coil 205; the terminal dehumidification coil 205 is used to dehumidify the high-humidity air.

[0043] In some embodiments, in combination Figure 3 and Figure 4 , i.e., a schematic diagram of the terminal dehumidification unit 104 and Figure 3 In the enlarged view of the area A, the dehumidification discharge unit includes: a water receiving tray 206 and a water pump 208 disposed in the water receiving tray 206;

[0044] The water receiving pan 206 is arranged below the terminal dehumidification coil 205 for receiving dehumidification condensed water; the water pump 208 is connected to the terminal condensed water pipeline 32 through the water pump receiving pipe 209 for discharging the dehumidified condensed water through the terminal condensed water pipeline 32 to the exhaust riser 102.

[0045] Specifically, the fresh air pretreated by the fresh air unit enters the room through the air supply port 100, and the sensible heat load in the room is processed by the radiation ceiling 103 to improve the user's comfort. At this time, the humidity content of the fresh air pretreated by the fresh air unit should be lower than the preset supply air humidity content to ensure that no condensation will be generated on the radiation ceiling 103; an exhaust port 101 is provided in the room, which is connected to the room and the exhaust riser 102; other wet loads in the room are processed by the terminal dehumidification unit 104, and the generated condensed water is led to the exhaust riser 102 through the terminal condensed water pipeline 32.

[0046] In some embodiments, a scale line 210 is provided on one side of the water receiving tray 206, and the bottom surface of the water receiving tray 206 is inclined.

[0047] In some embodiments, a sprinkler head 105 is provided at one end of the terminal condensate pipe 32 placed in the exhaust riser 102 .

[0048] Specifically, when it is detected that there is a need for dehumidification in the room, the terminal dehumidification unit 104 draws the indoor humid air through the terminal dehumidification coil 205 through the powered fan 200, and the dehumidified dry air is sent back to the room and sent to the surface of the radiation top plate 103 in the form of horizontal air supply to form a dry air layer to prevent condensation; the dehumidified condensed water is collected in the water receiving tray 206, and the bottom of the water receiving tray 206 has a certain inclination so that the water is collected in the water storage tank; a water pump 208 is placed in the water storage tank, and a liquid level scale 210 is marked on the side.

[0049] In some embodiments, the terminal adaptive dehumidification system also includes a four-way control proportional integral valve; the four valves of the four-way control proportional integral valve are respectively connected to the cold water supply pipe, the cold return water pipe, the radiation top plate 103 and the terminal dehumidification unit 104, and the four-way control proportional integral valve can adjust the water supply ratio obtained by the terminal dehumidification unit 104 from the cold water supply pipe and the radiation top plate 103.

[0050] Specifically, the mixing ratio of the low-temperature cold water supply at the front end and the water outlet of the radiation top plate 103 is controlled by a four-way control proportional integral valve, the water supply temperature of the terminal dehumidification unit 104 is adjusted, and the dehumidification amount is controlled collaboratively with the power fan 200; the terminal dehumidification unit 104 here monitors the air dew point near the radiation top plate 103 in real time through the indoor temperature and humidity sensor.

[0051] Those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present application and to form different embodiments.

[0052] Those skilled in the art will appreciate that the description of each embodiment has its own emphasis, and for parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0053] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations all fall within the scope defined by the attached claims. The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present utility model, and these modifications or replacements should be included in the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be based on the protection scope of the claims.

[0054] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A terminal dehumidification device for a fresh air radiation air conditioning system, characterized in that: Including front-end pre-dehumidification system and terminal adaptive dehumidification system; The front-end pre-dehumidification system includes: a fresh air unit, which is used to deliver fresh air to the radiation terminal through the fresh air main pipeline; a heat exchange unit connected to the fresh air unit, which is used to perform pre-dehumidification and heat exchange on the fresh air delivered to the radiation terminal; The terminal adaptive dehumidification system comprises: a terminal dehumidification unit, which is arranged at the radiation end and is used to dehumidify the indoor high-humidity air; and a dehumidification discharge unit, which is used to connect to the exhaust riser and release the dehumidified condensed water.

2. The terminal dehumidification equipment of the fresh air radiation air conditioning system according to claim 1 is characterized in that: The fresh air unit comprises: a fresh air fan, an exhaust fan, a first heat exchanger, a second heat exchanger and an intercooler heat exchanger; The fresh air fan comprises a filter section, a surface cooling section, a reheat section and a fan section which are arranged in sequence; the first heat exchanger is arranged at the front end of the filter section, and the fan section is connected to the fresh air main duct; The second heat exchanger is arranged at the front end of the exhaust fan, and the exhaust fan is connected to the exhaust main duct; The intercooler heat exchanger is connected to the surface cooling section through a fresh air condensate water pipeline, and is connected to the exhaust main pipeline through a main condensate water pipeline; the first heat exchanger, the second heat exchanger and the intercooler heat exchanger are connected in sequence through a heat medium exchange pipeline.

3. The terminal dehumidification equipment of a fresh air radiation air conditioning system according to claim 1 is characterized in that: The terminal dehumidification unit comprises: A terminal dehumidification coil and a power fan arranged at the rear end of the terminal dehumidification coil; the power fan is used to extract high-humidity air and make the high-humidity air pass through the terminal dehumidification coil; the terminal dehumidification coil is used to dehumidify the high-humidity air.

4. The terminal dehumidification equipment of the fresh air radiation air conditioning system according to claim 3 is characterized in that: The dehumidification discharge unit includes: a water receiving tray and a water pump arranged in the water receiving tray; The water receiving pan is arranged below the terminal dehumidification coil for receiving dehumidification condensed water; the water pump is connected to the terminal condensed water pipeline through the water pump water receiving pipe for discharging the dehumidification condensed water through the terminal condensed water pipeline to the exhaust riser.

5. The terminal dehumidification equipment of the fresh air radiation air conditioning system according to claim 4 is characterized in that: A scale line is arranged on one side of the water receiving tray, and the bottom surface of the water receiving tray is inclined.

6. The terminal dehumidification equipment of the fresh air radiation air conditioning system according to claim 5 is characterized in that: The end of the terminal condensate water pipeline placed in the exhaust riser is provided with a spray head.

7. The terminal dehumidification equipment of the fresh air radiation air conditioning system according to claim 6 is characterized in that: The terminal adaptive dehumidification system also includes a four-way control proportional integral valve; the four valves of the four-way control proportional integral valve are respectively connected to the cold water supply pipe, the cold return water pipe, the radiation top plate and the terminal dehumidification unit, and the four-way control proportional integral valve can adjust the water supply ratio obtained by the terminal dehumidification unit from the cold water supply pipe and the radiation top plate.

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