An energy-saving device for supply and return air zone control based on variable frequency precision air conditioner

Abstract

This utility model relates to an energy-saving device for zoning control of supply and return air based on a variable frequency precision air conditioner, belonging to the field of air conditioning and refrigeration technology. The energy-saving device for zoning control of supply and return air based on a variable frequency precision air conditioner includes a compressor, a condenser, and a dehumidification box. The dehumidification box is connected to both the compressor and the condenser via pipelines. A dehumidification component is installed inside the dehumidification box. The dehumidification box in the energy-saving device for zoning control of supply and return air based on a variable frequency precision air conditioner utilizes both the waste heat discharged from the compressor and the waste heat airflow discharged from the condenser for dehumidification. In this way, in high-humidity areas, the operating energy consumption of the entire supply and return air system based on the variable frequency precision air conditioner is greatly reduced.

Description

Technical Field

[0001] This utility model relates to an energy-saving device for supply and return air zone control based on a variable frequency precision air conditioner, belonging to the field of air conditioning and refrigeration technology. Background Technology

[0002] Variable frequency precision air conditioners are specialized air conditioning systems that achieve precise temperature and humidity control and high energy efficiency through variable frequency technology. They are widely used in places with strict environmental requirements, such as data centers, communication base stations, laboratories, and medical clean rooms. Their core principle is variable frequency speed control technology, which means that the compressor and fan motor speeds are adjusted in real time by a frequency converter, so that the cooling capacity / air volume dynamically matches the heat load changes, avoiding the frequent start-stop of traditional air conditioners.

[0003] The supply and return air system of variable frequency precision air conditioners is the core of their efficient operation. Its design and control directly affect the accuracy of temperature and humidity, energy efficiency ratio, and equipment life. The types of supply and return air systems are divided into top supply and bottom return and bottom supply and top return. The top supply and bottom return system is characterized by cold air being supplied from the top, heated by the floor or cabinet, and then returning from the bottom. Its advantage is that the airflow is uniform and it is suitable for high heat density computer rooms. The bottom supply and top return system is commonly seen in raised floor computer rooms. Cold air is supplied from the floor outlet upwards, and hot air is returned from the top. Its advantage is that it directly cools the air inlet of the cabinet and is highly efficient.

[0004] In related technologies, regardless of whether the supply and return air system of a variable frequency precision air conditioner is top-supply and bottom-return or bottom-supply and top-return, the compressor and condenser will generate a large amount of waste heat during operation. If this waste heat is directly discharged, it will waste a lot of heat source and increase energy consumption. Moreover, if the exhaust temperature of the defrosting pipe is not high during defrosting in the supply and return air system, it is easy to cause insufficient heat to meet the defrosting requirements, and additional heat source is required, which also increases the energy consumption of the entire supply and return air system of the variable frequency precision air conditioner during operation. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an energy-saving device for supply and return air zone control based on variable frequency precision air conditioners, thereby solving the problem of high energy consumption in the supply and return air system of variable frequency precision air conditioners in the background art.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An energy-saving device for supply and return air zoning control based on a variable frequency precision air conditioner, the device comprising:

[0008] The compressor, the condenser, and the dehumidification box that simultaneously utilizes the waste heat discharged from the compressor and the waste heat airflow discharged from the condenser for dehumidification, wherein the dehumidification box is connected to the compressor and the condenser through pipelines.

[0009] The dehumidification box is equipped with a dehumidification assembly that uses waste heat airflow delivered by both a compressor and a condenser as a power source.

[0010] Preferably, the dehumidification assembly includes a turbine, a rotating shaft, and spiral blades. A filter plate is provided at one end of the dehumidification box, and the rotating shaft is rotatably installed at the center of the filter plate. The turbine and spiral blades are respectively installed on the rotating shaft. The spiral blades adopt a gradient silica gel-molecular sieve layered structure, which is divided into an inner layer and an outer layer.

[0011] Preferably, the helical blade includes a front helical blade and a rear helical blade, which are arranged in a front-to-back pattern on the rotating shaft; the front helical blade has a large pitch structure, and the rear helical blade has a small pitch structure.

[0012] Preferably, both the surface of the front helical blade and the surface of the rear helical blade are formed with pit texture, and the diameter of the pit texture is controlled between 0.5 and 1.0 mm.

[0013] Preferably, the above-mentioned energy-saving device for supply and return air zoning control based on variable frequency precision air conditioner also includes the supply and return air system of the air conditioner. The supply and return air system of the air conditioner includes: a compressor, a subcooling coil, a condenser, a liquid receiver, a filter, an expansion valve, and an evaporator. The compressor, subcooling coil, condenser, liquid receiver, filter, expansion valve, and evaporator are sequentially connected by pipelines to form a refrigeration system loop. A first fan is installed on one side of the condenser. A first solenoid valve is installed on the pipeline connecting the filter and the expansion valve. A water heating coil and a second fan are installed on both sides of the evaporator.

[0014] Preferably, the pipeline connecting the condenser and the subcooling coil is connected to the pipeline between the expansion valve and the evaporator via a hot gas defrosting system circuit; the hot gas defrosting system circuit includes a compressor, a subcooling coil, a second solenoid valve, a condensing pressure regulating valve, a water pan heating coil, and a check valve; the compressor, subcooling coil, second solenoid valve, condensing pressure regulating valve, water pan heating coil, and check valve are connected sequentially via pipelines.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The energy-saving device for supply and return air zoning control based on variable frequency precision air conditioning has the following advantages:

[0017] First, by adding a dehumidification box to the supply and return air system, the dehumidification box is simultaneously connected to the compressor and the condenser through pipelines. The dehumidification box is equipped with a dehumidification component. The dehumidification component uses the waste heat airflow simultaneously delivered by the compressor and the condenser as its power source. The dehumidification box uses the waste heat discharged by the compressor and the waste heat airflow discharged by the condenser for dehumidification. In high humidity areas, this greatly reduces the operating energy consumption of the entire supply and return air system based on the variable frequency precision air conditioner.

[0018] Second, a hot air defrosting system loop is constructed on the supply and return air system. For example, the condensing pressure regulating valve set in the hot air defrosting system loop increases the exhaust pressure during defrosting of the entire supply and return air zone, causing the corresponding exhaust temperature to rise as well, thereby improving the defrosting speed (efficiency). This avoids the need to add an extra heat source to improve the defrosting operation and also greatly reduces the energy consumption of the air conditioner during operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an energy-saving device for supply and return air zone control based on a variable frequency precision air conditioner according to this utility model.

[0021] Figure 2 This is a schematic diagram of the dehumidifier box of an energy-saving device for supply and return air zone control based on a variable frequency precision air conditioner according to this utility model.

[0022] Figure 3 This is a schematic diagram of the dehumidification component of a dehumidification box in a variable frequency precision air conditioner-based energy-saving device for supply and return air zone control.

[0023] Figure 4 This is a schematic diagram of the propeller blades of a dehumidifier box in an energy-saving device for supply and return air zone control based on a variable frequency precision air conditioner, according to this utility model.

[0024] In the diagram: 1-Compressor, 2-Subcooling coil, 3-Dehumidifier box, 4-Condenser, 5-First fan, 6-Liquid receiver, 7-Filter, 8-First solenoid valve, 9-Expansion valve, 10-Check valve, 11-Second fan, 12-Evaporator, 13-Water pan heating coil, 14-Condensing pressure regulating valve, 15-Second solenoid valve, 16-Filter plate, 17-Shaft, 18-Turbine, 19-Front spiral blade, 20-Rear spiral blade, 21-Pit texture. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution:

[0027] An energy-saving device for supply and return air zoning control based on a variable frequency precision air conditioner, the device comprising:

[0028] The compressor 1, the condenser 4, and the dehumidification box 3 are all connected to the compressor 1 and the condenser 4 through pipelines.

[0029] The dehumidification box 3 utilizes the waste heat discharged from the compressor 1 and the waste heat airflow discharged from the condenser 4 for dehumidification, which greatly reduces the operating energy consumption of the entire supply and return air system based on the variable frequency precision air conditioner in high humidity areas.

[0030] The dehumidification box 3 is equipped with a dehumidification component, which uses the waste heat airflow simultaneously delivered by the compressor 1 and the condenser 4 as a power source.

[0031] The dehumidification assembly includes a turbine 18, a rotating shaft 17, and spiral blades. A filter plate 16 is located at one end of the dehumidification chamber 3, and the rotating shaft 17 is rotatably mounted at the axis of the filter plate 16. The turbine 18 and spiral blades are mounted on the rotating shaft 17. The spiral blades adopt a gradient silica gel-molecular sieve layered structure, divided into an inner layer and an outer layer. The inner layer is the high-temperature zone, made of a high-temperature resistant molecular sieve (such as type 13X), which performs deep dehumidification (dew point ≤ -40℃) for the air conditioning supply and return air system. The outer layer is the low-temperature zone, made of hydrophobic silica gel material, which can quickly adsorb high-humidity air.

[0032] When the waste heat airflow delivered by the compressor 1 and the condenser 4 enters the dehumidification box 3, the waste heat airflow passes through the filter plate 16 and enters the dehumidification box 3. The flow of waste heat airflow can create turbulent force on the surface of the turbine 18, which drives the turbine 18 to rotate. When the turbine 18 rotates, it will drive the spiral blades installed on the rotating shaft 17 to rotate, which is used to dehumidify the waste heat airflow.

[0033] Please refer to Figure 24 for subcooling coil. Specifically, the spiral blades include a front spiral blade 19 and a rear spiral blade 20, which are arranged in a front-to-back pattern on the rotating shaft 17.

[0034] The front spiral blade 19 located at the air inlet of the dehumidifier box 3 adopts a large pitch, such as pitch P=1.5D (D is the diameter of the air duct), which can reduce the initial resistance of the high-speed airflow; while the rear spiral blade 20 located at the air outlet of the dehumidifier box 3 adopts a small pitch, such as 0.8D, which can enhance the uniformity of airflow coverage on the surface of the spiral blade.

[0035] Please see Figure 3 and Figure 4 Specifically, both the surface of the front helical blade 19 and the surface of the rear helical blade 20 are formed with pit texture 21. The diameter of the pit texture 21 formed on the surface of the helical blade is controlled at 0.51mm. This makes the installed helical blade similar to the surface effect of a golf ball, which can further reduce the turbulence noise generated when the helical blade rotates.

[0036] Please see Figure 1 The aforementioned energy-saving device for zoning control of supply and return air based on variable frequency precision air conditioners also includes the supply and return air system of the air conditioner, which includes:

[0037] Compressor 1, subcooling coil 2, condenser 4, liquid receiver 6, filter 7, expansion valve 9 and evaporator 12 are connected sequentially through pipelines to form a refrigeration system circuit.

[0038] A first fan 5 is installed on one side of the condenser 4; a first solenoid valve 8 is installed on the pipeline connecting the filter 7 and the expansion valve 9; a water pan heating coil 13 and a second fan 11 are installed on both sides of the evaporator 12.

[0039] Compressor 1 is used to compress the refrigerant, raising it from a low-pressure gas to a high-pressure gas, thereby increasing its pressure and temperature. The subcooling coil 2 is used to exchange heat with the compressed high-pressure gas refrigerant, performing the first cooling. The condenser 4 performs a second heat exchange and cooling on the refrigerant after heat exchange. A first fan 5 is installed on one side of the condenser 4 to ventilate and dissipate heat from the condenser 4 after heat exchange, improving the heat exchange and cooling effect of the condenser 4 on the refrigerant. Furthermore, the waste heat generated during the simultaneous operation of compressor 1 and condenser 4 is transferred to the dehumidification box 3 to achieve dehumidification of the waste heat airflow.

[0040] The liquid receiver 6 is used to store the refrigerant liquid condensed after cooling; later, the refrigerant liquid is filtered and purified by the filter 7 and then transported to the evaporator 12 for heat exchange and vaporization, so that the refrigerant can bring a cooling effect and then be recycled.

[0041] Please see Figure 1 Specifically, the hot gas defrosting system circuit, which connects the condenser 4 and the subcooling coil 2 to the expansion valve 9 and the evaporator 12, includes the compressor 1, the subcooling coil 2, the second solenoid valve 15, the condensing pressure regulating valve 14, the water pan heating coil 13, and the check valve 10; the compressor 1, the subcooling coil 2, the second solenoid valve 15, the condensing pressure regulating valve 14, the water pan heating coil 13, and the check valve 10 are connected sequentially through pipelines.

[0042] The condensing pressure regulating valve 14 is used to increase the exhaust pressure during defrosting of the entire hot air defrosting system loop, which also increases the corresponding exhaust temperature, thereby improving the defrosting speed (efficiency) of the entire energy-saving device for supply and return air zoning control based on variable frequency precision air conditioner.

[0043] The workflow of this embodiment is as follows:

[0044] The entire energy-saving device based on variable frequency precision air conditioner supply and return air zone control can utilize the waste heat airflow generated by the compressor 1 and condenser 4 during operation through the installed dehumidification box 3 to perform dehumidification, realize waste heat utilization, eliminate the need to connect an additional heat source for dehumidification, and reduce the energy consumption of air conditioner operation.

[0045] At the same time, by constructing a hot air defrosting system loop, such as the condensing pressure regulating valve 14 set in the hot air defrosting system loop, the exhaust pressure during defrosting of the entire supply and return air zone is increased, and the corresponding exhaust temperature also rises, thereby improving the defrosting speed (efficiency). This can avoid adding an extra heat source to improve the defrosting operation and also greatly reduce the energy consumption of the air conditioner during operation.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving device for supply and return air zoning control based on a variable frequency precision air conditioner, characterized in that... include: The compressor (1), the condenser (4) and the dehumidification box (3) which simultaneously utilizes the waste heat discharged by the compressor (1) and the waste heat airflow discharged by the condenser (4) for dehumidification operation, the dehumidification box (3) is connected to the compressor (1) through a pipeline and the dehumidification box (3) is connected to the condenser (4) through a pipeline. The dehumidification box (3) is equipped with a dehumidification component that uses waste heat airflow delivered by the compressor (1) and condenser (4) as a power source.

2. The energy-saving device for supply and return air zoning control based on a variable frequency precision air conditioner according to claim 1, characterized in that: The dehumidification assembly includes a turbine (18), a rotating shaft (17), and spiral blades. A filter plate (16) is provided at one end of the dehumidification box (3), and one end of the rotating shaft (17) is rotatably installed at the center of the filter plate (16). The turbine (18) and spiral blades are respectively installed on the rotating shaft (17). The spiral blades adopt a gradient silica gel-molecular sieve layered structure, which is divided into an inner layer and an outer layer.

3. The energy-saving device for supply and return air zoning control based on a variable frequency precision air conditioner according to claim 2, characterized in that: The spiral blades include a front spiral blade (19) and a rear spiral blade (20), which are arranged in a front-to-back pattern on the rotating shaft (17); the front spiral blade (19) has a large pitch structure and the rear spiral blade (20) has a small pitch structure.

4. The energy-saving device for supply and return air zoning control based on a variable frequency precision air conditioner according to claim 3, characterized in that: Both the surface of the front helical blade (19) and the surface of the rear helical blade (20) are formed with pit texture (21), and the diameter of the pit texture (21) is controlled between 0.5 and 1 mm.

5. The energy-saving device for supply and return air zoning control based on a variable frequency precision air conditioner according to claim 1, characterized in that, Also includes: The air supply and return system of the air conditioner includes: compressor (1), subcooling coil (2), condenser (4), liquid receiver (6), filter (7), expansion valve (9) and evaporator (12). The compressor (1), subcooling coil (2), condenser (4), liquid receiver (6), filter (7), expansion valve (9) and evaporator (12) are connected in sequence through pipelines to form a refrigeration system loop. A first fan (5) is installed on one side of the condenser (4). A first solenoid valve (8) is provided on the pipeline connecting the filter (7) and the expansion valve (9). A water heating coil (13) and a second fan (11) are provided on both sides of the evaporator (12).

6. The energy-saving device for supply and return air zoning control based on a variable frequency precision air conditioner according to claim 5, characterized in that: The hot gas defrosting system circuit is connected to the pipeline connecting the condenser (4) and the subcooling coil (2) and the pipeline between the expansion valve (9) and the evaporator (12); the hot gas defrosting system circuit includes the compressor (1), the subcooling coil (2), the second solenoid valve (15), the condensing pressure regulating valve (14), the water pan heating coil (13) and the check valve (10); the compressor (1), the subcooling coil (2), the second solenoid valve (15), the condensing pressure regulating valve (14), the water pan heating coil (13) and the check valve (10) are connected in sequence through pipelines.

Images