Air treatment equipment and its control method

Abstract

The present invention discloses an air handling device and its control method. The air handling device includes an air inlet and an air outlet, and a heat exchanger assembly located in the air duct between the air inlet and the air outlet for generating condensed water; a water tank, which is arranged between the air inlet and the heat exchanger assembly and is used for collecting pre-cooled water, and the pre-cooled water includes the condensed water generated by the heat exchanger assembly; at least one air supply duct, which passes through the water tank and communicates with the air duct between the air inlet and the heat exchanger assembly, so that the air entering the air inlet exchanges pre-cooling heat with the pre-cooled water. The present invention can efficiently recover and make full use of the cold quantity of the condensed water, and use it in the pre-cooling section of the fresh air, which can greatly reduce the operation energy consumption of the air-conditioning unit.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment equipment, and in particular to an air treatment equipment capable of recycling condensed water for precooling, and a control method corresponding to the air treatment equipment. Background Art

[0002] During the use of air conditioning equipment in civil buildings and industrial buildings, a large amount of condensed water will be generated. When refrigerating in occasions with a high latent heat load, about 0.8 kg of condensed water at 10°C to 15°C is generated per 1 kW of cooling load per hour. This part of the condensed water is usually directly discharged into the drainage system, resulting in a huge waste of cooling capacity.

[0003] In the prior art, some measures have also been taken to avoid the waste of condensed water. For example, the prior art with the publication number CN202938484U discloses a device for recycling and utilizing air conditioning condensed water. This device for recycling and utilizing air conditioning condensed water solves the problem of condensed water discharge by collecting condensed water in a water collection tank, avoiding the waste of water resources. However, the cooling capacity of the condensed water itself is not utilized, resulting in the problem of waste of cooling capacity. Another example is the prior art with the publication number CN206449818U, which discloses a device for recycling and reusing domestic air conditioning condensed water. This device for recycling and reusing domestic air conditioning condensed water solves the problem of the relatively scattered distribution of domestic air conditioners and the difficulty of recycling. However, this technical solution sprays the condensed water on the air conditioner condenser, which easily causes a large amount of dust to be adsorbed on the heat dissipation fins, and ultimately leads to problems such as reduced heat dissipation effect of the heat dissipation fins.

[0004] Therefore, how to provide an air treatment equipment that can make full use of the cooling capacity of condensed water is a technical problem that the industry urgently needs to solve. Summary of the Invention

[0005] In order to solve the technical problem that the cooling capacity of condensed water in the prior art is not fully utilized, the present invention provides an air treatment equipment and its control method.

[0006] The air treatment equipment proposed by the present invention includes an air inlet and an air outlet, and a heat exchanger assembly located in the air duct between the air inlet and the air outlet for generating condensed water. The air treatment equipment further includes:

[0007] A water tank, which is arranged between the air inlet and the heat exchanger assembly and is used for collecting precooling water, and the precooling water includes the condensed water generated by the heat exchanger assembly;

[0008] At least one air supply pipe, which passes through the water tank and communicates with the air duct between the air inlet and the heat exchanger assembly, so that the air entering the air inlet exchanges precooling heat with the precooling water.

[0009] Furthermore, heat exchange fins are provided on the outer circumferential wall of the air supply pipe.

[0010] Furthermore, a plurality of heat exchange fins are evenly arranged around the outer circumferential wall of the air supply duct, and a water flow channel formed between any two adjacent heat exchange fins is parallel to the axial direction of the air supply duct.

[0011] Furthermore, the heat exchange fins are multiple planes respectively arranged along different radial directions of the air supply duct, or the heat exchange fins are multiple curved surfaces with the same curvature extending outward from different radial positions of the air supply duct.

[0012] Furthermore, a plurality of air supply ducts are provided, and the plurality of air supply ducts are cylindrical with the same pipe diameter. The center distance between adjacent air supply ducts is greater than or equal to 1.25D, where D is the pipe diameter of the air supply duct.

[0013] Furthermore, a water outlet for pre-cooled water is provided on one side of the water tank close to the air inlet, and a water inlet for the pre-cooled water is provided on the other side of the water tank far from the air inlet.

[0014] Furthermore, at least one baffle is provided in the water tank, and the baffle divides the water tank to form a meandering water channel from the water inlet of the pre-cooled water to the water outlet of the pre-cooled water.

[0015] Furthermore, the water inlet of the pre-cooled water is arranged close to the bottom of the water tank. The baffle adjacent to the water inlet of the pre-cooled water extends from the bottom of the water tank towards its top, and the height of this baffle is less than the height of the top of the water tank.

[0016] Furthermore, when the number of baffles is odd, the water outlet of the pre-cooled water is arranged close to the bottom of the water tank. When the number of baffles is even, the water outlet of the pre-cooled water is arranged close to the top of the water tank.

[0017] Furthermore, drain outlets and drain valves are provided at the bottom of the water tank on both sides of the baffle extending from the bottom of the water tank towards its top.

[0018] Furthermore, the water tank is communicated with a tap water replenishment port, and the pre-cooled water also includes tap water.

[0019] Furthermore, the air duct between the air inlet and the air outlet includes upper and lower layers of air ducts that are communicated with each other. The heat exchanger assembly and the air outlet are located in the upper air duct, the water tank and the air inlet are located in the lower air duct, and the condensed water generated by the heat exchanger assembly flows into the water tank by gravity.

[0020] Furthermore, the air handling equipment includes a fresh air conditioner.

[0021] Furthermore, the heat exchanger assembly includes a heat exchanger assembly for generating condensed water in the outer circulation and a heat exchanger assembly for generating condensed water in the inner circulation.

[0022] Further, a bypass air valve for switching use with the heat exchanger is provided on one side of the heat exchanger of the heat exchanger assembly for generating condensed water in the outer loop.

[0023] The control method of the air handling equipment proposed by the present invention includes:

[0024] Step 1, when the air handling equipment operates in refrigeration mode, if there is no pre-cooled water in the water tank, detect the inlet water temperature of the pre-cooled water other than the condensed water and the inlet air temperature of the air inlet.

[0025] Step 2, if the inlet water temperature of the pre-cooled water other than the condensed water is lower than the inlet air temperature, collect the condensed water and the pre-cooled water other than the condensed water to the preset water level of the water tank to form a cold source for the pre-cooling section.

[0026] Further, it also includes:

[0027] Step 3, if the inlet water temperature of the pre-cooled water other than the condensed water is greater than or equal to the inlet air temperature, the water tank does not collect the pre-cooled water.

[0028] Further, it also includes:

[0029] Step 4, monitor the water temperature at the outlet of the pre-cooled water in the water tank and the inlet air temperature of the air inlet.

[0030] Step 5, if the water temperature at the outlet of the pre-cooled water in the water tank is greater than or equal to the inlet air temperature, empty the pre-cooled water in the water tank and return to Step 1.

[0031] Further, it also includes:

[0032] Step 6, monitor the cleanliness of the pre-cooled water in the water tank.

[0033] Step 7, if the cleanliness of the pre-cooled water in the water tank is lower than the preset cleanliness or reaches the set cleaning cycle time, empty the pre-cooled water in the water tank and flush the water tank with the pre-cooled water other than the condensed water. After flushing, return to Step 1.

[0034] After the condensed water is recovered by heat, it is used as the water source for the pre-cooling section to pre-cool and exchange heat with the fresh air entering from the air inlet. This not only makes rational use of the waste water, but also fully utilizes its cooling capacity, which can greatly reduce the temperature of the fresh air and the chilled water volume in the surface cooler section, thereby reducing the loads of equipment such as the main unit, water pump, and cooling tower, and bringing great economic benefits to the enterprise. Further, the present invention also improves the structure of the water tank for collecting condensed water to make the flow direction of the pre-cooled water in the water tank opposite to that of the air, achieving countercurrent heat exchange and fully utilizing the cooling capacity of the pre-cooled water. In addition, the present invention also adjusts the structure of the air handling equipment to reduce the system resistance, utilizes the gravity advantage to collect condensed water, reduces the setting of water pumps, and further reduces energy consumption. The present invention also considers that there are substances such as dust and bacteria in the air, and there are more pollutants in the condensed water condensed therefrom. To avoid scaling on the outside of the air supply pipe in the water tank, corresponding solenoid valves and sensors are provided inside the water tank to achieve timed sewage discharge and cleaning, making the heat exchange more sufficient and ensuring the best heat recovery effect. Description of the Drawings

[0035] The present invention will be described in detail below in conjunction with the embodiments and the drawings, wherein:

[0036] Figure 1 is a schematic cross-sectional structure diagram of the air supply pipe of the present invention.

[0037] Figure 2 is a schematic diagram of the heat exchange structure of the water tank according to an embodiment of the present invention.

[0038] Figure 3 is a schematic diagram of the structure of the unit according to an embodiment of the present invention.

[0039] Figure 4 is a top view schematic diagram of the unit according to an embodiment of the present invention.

[0040] Description of the Reference Numerals:

[0041] 1, surface cooler; 2, intermediate filter; 3, bypass air valve; 4, primary filter; 5, fresh air supply fan; 6, air inlet; 7, air outlet; 8, water tank; 9, tap water make-up port; 10, condensed water receiving tray; 11, drain port; 12, air supply pipe; 13, fresh air direction; 14, condensed water inlet; 15, outlet of pre-cooled water; 16, baffle; 17, tap water temperature sensor; 18, tap water make-up valve; 19, condensed water temperature sensor; 20, condensed water inlet valve; 21, No. I drain valve; 22, No. II drain valve; 23, outlet water temperature sensor; 24, condensed water outlet valve; 25, fresh air temperature sensor; 26, liquid level sensor. Detailed Embodiments

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] Thus, a feature pointed out in this specification will be used to illustrate one feature of one embodiment of the present invention, rather than implying that each embodiment of the present invention must have the feature described. In addition, it should be noted that this specification describes many features. Although some features may be combined to show possible system designs, these features can also be used in other combinations not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0044] The air treatment device of the present invention mainly includes an air inlet, an air outlet 7, a heat exchanger assembly in the air duct between the air inlet and the air outlet 7, a water tank, and an air supply pipe.

[0045] The heat exchanger assembly mentioned in the present invention is specifically a heat exchanger assembly for generating condensed water. Taking the fresh air conditioner as an example of the air treatment device, from the perspective of the heat exchange cycle, the fresh air conditioner can be divided into an external cycle for heat exchange with the outside air and an internal cycle for heat exchange with the indoor air. At this time, the heat exchanger assembly for generating condensed water referred to in the present invention can include both the heat exchanger assembly for generating condensed water in the external cycle and the heat exchanger assembly for generating condensed water in the internal cycle, or can only include any one of the heat exchanger assemblies for generating condensed water. In addition, although the air treatment device may also include a heat exchanger assembly for realizing air heating, since it has a weak connection with the inventive point of the present invention, it will not be described in detail here.

[0046] The water tank of the present invention is specifically arranged between the air inlet and the heat exchanger assembly. The water tank is used to collect pre-cooled water. One source of the pre-cooled water is the condensed water generated by the above-mentioned heat exchanger assembly for generating condensed water, that is, the pre-cooled water includes the condensed water generated by the heat exchanger assembly. In one embodiment, another source of the pre-cooled water can be tap water. By connecting the water tank to the tap water filling port 9, when the temperature of the tap water is lower than the air inlet temperature, the pre-cooling effect can also be achieved. Therefore, the pre-cooled water of the present invention also includes tap water. The height of the condensed water receiving tray 10 in the heat exchanger assembly for generating condensed water of the present invention should be able to overcome the resistance of the condensed water inside the water tank. The condensed water receiving tray 10 can not only collect the condensed water of its own fresh air unit, but also collect the condensed water of the nearby fan coil units. If there is no condensed water to collect, tap water can also be used to fill the water tank, and tap water is used as the cold source for the fresh air pre-cooling section.

[0047] In one embodiment, a water outlet 15 for pre-cooled water is provided on one side of the water tank of the present invention close to the air inlet, and a water inlet for pre-cooled water is provided on the other side of the water tank far from the air inlet. That is to say, the water flow direction of the pre-cooled water in the water tank is completely opposite to the air inlet direction of the air handling device, so as to achieve sufficient heat exchange of the pre-cooled water.

[0048] In a further embodiment, at least one baffle 16 is further provided in the water tank. The baffle 16 divides the water tank to form a meandering water channel from the water inlet of the pre-cooled water to the water outlet 15 of the pre-cooled water. The meandering water channel extends the flow path of the pre-cooled water, and further enables the pre-cooled water to fully exchange heat with the heat exchange tubes.

[0049] There is at least one air supply duct. In a preferred embodiment, there are multiple air supply ducts. The air supply ducts pass through the water tank to connect the air duct between the air inlet and the heat exchanger assembly, so that the air entering from the air inlet exchanges pre-cooling heat with the pre-cooled water. Since the water tank is used to collect condensed water, the cold quantity of the condensed water exchanges heat with the air in the air supply duct, so that the air entering from the air inlet is pre-cooled by the condensed water, thus making full use of the cold quantity of the condensed water. In one embodiment, the diameters of the multiple air supply ducts are the same. Assuming that the air supply duct is cylindrical and the diameter of the air supply duct is D, the center distance between adjacent air supply ducts is greater than or equal to 1.25D to achieve the best heat exchange effect with the pre-cooled water.

[0050] In a specific embodiment, heat exchange fins are provided on the outer circumferential wall of the air supply duct, so as to achieve a better heat exchange effect. In a further specific embodiment, multiple heat exchange fins can be provided. The multiple heat exchange fins are evenly arranged around the outer circumferential wall of the air supply duct, and the water flow channels formed between any two adjacent heat exchange fins are parallel to the axial direction of the air supply duct. Figure 1 Two embodiments of the heat exchange fins are given. In the first embodiment, the specific shape of the heat exchange fin is a strip-shaped plane, and multiple plane heat exchange fins are respectively arranged along different radial directions of the air supply duct. In the second embodiment, the specific shape of the heat exchange fin is a strip-shaped curved surface. The heat exchange fins are fixed in different radial directions and form a curved surface with the same curvature extending outward from different radial positions of the air supply duct.

[0051] Figure 2A specific embodiment of the water tank and related components such as the air supply pipe is given. In this embodiment, the inlet of the pre-cooled water is arranged near the bottom of the water tank. For example, after the heat exchanger assembly for generating condensed water generates condensed water, it is initially collected by the condensed water receiving tray 10 in the heat exchanger assembly, and then extends into the bottom of the water tank through a pipe, such as 1-2 cm away from the bottom of the water tank. This creates a certain height difference between the condensed water receiving tray 10 and the outlet of the pipe (i.e., the inlet of the pre-cooled water), so that the pre-cooled water can fall into the water tank under the action of gravity without the need to use power components such as water pumps. Further, the baffle 16 adjacent to the inlet of the pre-cooled water extends from the bottom of the water tank towards its top, and the height of the baffle 16 is less than the height of the top of the water tank. Assuming there is only one baffle 16 currently, the water tank will be divided into two spaces. Define the space where the inlet of the pre-cooled water is located as the first space, and the space where the outlet 15 of the pre-cooled water is located as the second space. Then the flow process of the condensed water is to slowly rise from the bottom of the first space. When it rises to the height of the baffle 16, it will flow into the second space. The outlet 15 of the pre-cooled water is arranged near the bottom of the second space, so that the water in the water tank can flow through the winding water channel formed by the baffle and then flow out from the outlet 15 of the pre-cooled water.

[0052] Figure 2 In this embodiment, two baffle plates 16 are provided. Since the baffle plates 16 need to form a winding water channel, and the baffle plate 16 adjacent to the inlet of the pre-cooled water extends from the bottom of the water tank towards its top, and the height of the baffle plate 16 is less than the height of the top of the water tank, then the other baffle plate 16 needs to extend from the top of the water tank towards its bottom, and a gap needs to be left between the bottom of the baffle plate 16 and the bottom of the water tank for the pre-cooled water to pass through. At this time, the water tank is divided into three interconnected spaces. Define the space where the inlet of the pre-cooled water is located as the first space, the space where the outlet 15 of the pre-cooled water is located as the third space, and the space between the first space and the third space as the second space. Then the flow process of the condensed water is to slowly rise from the bottom of the first space. When it rises to the height of the baffle plate 16, it will flow into the second space. Since the bottoms of the second space and the third space are connected, the pre-cooled water in the second space will then flow into the third space immediately. The water level in the second space changes in real-time and is equal to the water level in the third space. When the water level in the third space reaches the outlet 15 of the pre-cooled water, the pre-cooled water will be discharged from the outlet 15 of the pre-cooled water. In this embodiment, the outlet 15 of the pre-cooled water is arranged near the top of the water tank. Since an air supply pipe is arranged in the water tank, the low-temperature condensed water slowly flows into the water tank from the bottom of the water tank under the action of gravity, forms a countercurrent heat exchange with the air entering from the air inlet, pre-cools the air in the air supply pipe, and then the high-temperature condensed water is discharged from the upper part of the water tank.

[0053] As can be seen from the specific embodiments of the above two baffle plates, since the inlet of the pre-cooled water is provided at the bottom of the water tank, and the baffle plate 16 adjacent to the pre-cooled water extends from the bottom of the water tank towards its top, and the height of this baffle plate is less than the height of the top of the water tank, then when the number of baffle plates is odd, the outlet of the pre-cooled water should be arranged close to the bottom of the water tank. When the number of baffle plates is even, the outlet of the pre-cooled water should be arranged close to the top of the water tank. This can make the water flow of the pre-cooled water flow in the water tank along the winding water channel, and it will not cause the pre-cooled water in a certain space to be difficult to participate in the flow of the pre-cooled water.

[0054] Considering that there are dust and other impurities in the condensed water, in an embodiment of the present invention, drain ports 11 and drain valves are provided at the bottom of the water tank on both sides of the baffle plate 16 extending from the bottom of the water tank towards its top. When the baffle plate 16 is one or two, the drain valve in the first space is the No. I drain valve 21, and the drain valve in the second space or the second and third spaces is the No. II drain valve 22.

[0055] Figure 3 、 Figure 4 A specific structural embodiment of the air inlet, the air supply port 7 and the heat exchanger assembly for generating condensed water is shown. In this embodiment, a primary filter 4 is provided at the air inlet, and the heat exchanger in the heat exchanger assembly is specifically a surface cooler 1. An intermediate filter 2 is provided in the air duct in front of the surface cooler 1.

[0056] The air duct between the air inlet and the air supply port 7 includes upper and lower layers of air ducts that are interconnected. The heat exchanger assembly and the air supply port 7 are located in the upper air duct, the water tank and the air inlet are located in the lower air duct, and the condensed water generated by the heat exchanger assembly flows into the water tank by gravity.

[0057] The air handling equipment of the present invention can include a fresh air conditioner or a general air conditioner. When the air handling equipment of the present invention is a fresh air conditioner, a bypass air valve 3 for switching use with the heat exchanger is provided on one side of the heat exchanger of the heat exchanger assembly for generating condensed water in the external circulation. When the transitional season comes, although the fresh air conditioner still extracts fresh air from the outside, the fresh air no longer needs to be refrigerated. Therefore, the air inlet channel of the surface cooler 1 can be closed, and air can enter through the bypass air valve 3, which can reduce the air inlet resistance.

[0058] The unit is structurally divided into upper and lower layers. The upper layer mainly includes a surface cooler 1, an intermediate filter 2, a bypass air valve 3, a primary filter 4, a fresh air supply fan 5, an air inlet 6, an air outlet 7, and a condensate water catch pan 10. The lower layer mainly includes a water tank 8, a drain outlet 11, an air supply duct 12, a condensate water inlet 14 which is one of the inlets of pre-cooled water, an outlet of pre-cooled water 15, a baffle 16, a tap water temperature sensor 17, a tap water make-up valve 18, a condensate water temperature sensor 19, a condensate water inlet valve 20, a No. I drain valve 21, a No. II drain valve 22, an outlet water temperature sensor 23, a condensate water outlet valve 24, a fresh air temperature sensor 25, and a liquid level sensor 26. The fresh air in the lower layer is conveyed to the upper layer through the air supply duct 12 for further treatment. The condensate water catch pan 10 is arranged in the upper layer to collect the low-temperature condensate water generated during the refrigeration process of the air treatment equipment, and then store it in the water tank 8.

[0059] The present invention also protects the control method of the above air treatment equipment. The control method of the present invention needs to be paired with corresponding temperature sensors for implementation. A fresh air temperature sensor 25 is arranged at the air inlet of the air treatment equipment, and its temperature is taken as [T X , a tap water temperature sensor 17 is arranged at the tap water make-up port, and its temperature is taken as [T Z , an outlet water temperature sensor 23 is arranged at the outlet of the pre-cooled water, and its temperature is taken as [T C , and a liquid level sensor 26 is arranged inside the water tank, usually also in the space where the sensor is located near the outlet of the pre-cooled water.

[0060] Taking a fresh air conditioner as an example, the condensate water inlet valve 20 is interlocked with the fresh air unit for external circulation, the fan coil unit for internal circulation and other air treatment equipment in the air treatment equipment. When the nearby fan coil unit and other air treatment equipment are started, the fresh air unit synchronously and interlockingly opens the condensate water inlet valve 20 to collect and store the condensate water in the water tank for use when the fresh air unit is started.

[0061] The control method of the air treatment equipment of the present invention includes:

[0062] Step 1, when the air treatment equipment is operating in refrigeration, if there is no pre-cooled water in the water tank, detect the inlet water temperature of the pre-cooled water other than the condensate water, and the inlet air temperature of the air inlet.

[0063] Step 2, if the inlet water temperature of the pre-cooled water other than the condensate water is less than the inlet air temperature, collect the condensate water and the pre-cooled water other than the condensate water to the preset water level of the water tank to form a cold source for the pre-cooling section.

[0064] In one embodiment, it further includes Step 3, if the inlet water temperature of the pre-cooled water other than the condensate water is greater than or equal to the inlet air temperature, the water tank does not collect the pre-cooled water.

[0065] Specifically, when the air handling equipment starts, when the temperature of tap water Z > the temperature of the fresh air inlet X , no water replenishment operation is performed. At this time, if there is no condensate water inside the water tank, the fresh air unit only cools the fresh air by the surface cooler; when the temperature of tap water Z < the temperature of the fresh air inlet X , the tap water replenishment valve 18 is opened. When the liquid level in the water tank reaches the set position of the liquid level sensor 26, the tap water replenishment valve 18 is closed. At this time, the condensate water and / or tap water in the water tank serve as the cold source for the pre-cooling section of the fresh air.

[0066] When the air handling equipment operates to generate condensate water, it flows into the water tank under the action of gravity. At this time, the water tank will automatically discharge an equal volume of water from the outlet 15 of the pre-cooled water.

[0067] The control method of the present invention further includes:

[0068] Step 4, monitoring the water temperature at the outlet of the pre-cooled water in the water tank and the inlet air temperature at the inlet;

[0069] Step 5, if the water temperature at the outlet of the pre-cooled water in the water tank is greater than or equal to the inlet air temperature, empty the pre-cooled water in the water tank and return to Step 1.

[0070] Specifically, when the temperature measured by the outlet temperature sensor C > the temperature of the fresh air inlet X , open the No. I and No. II drain valves 21 and 22 to empty the condensate water and / or tap water inside the water tank. At this time, when the temperature of tap water Z > the temperature of the fresh air inlet X , no water replenishment operation is performed. The fresh air unit only cools the fresh air by the surface cooler or the condensate water generated when other air handling units operate; when the temperature of tap water Z < the temperature of the fresh air inlet X , open the tap water replenishment valve 18. When the liquid level reaches the specified position, close the tap water replenishment valve 18. At this time, the tap water and the condensate water generated by the heat exchanger assembly in the water tank serve as the cold source for the pre-cooling section of the fresh air.

[0071] The control method of the present invention further includes:

[0072] Step 6, monitoring the cleanliness of the pre-cooled water in the water tank;

[0073] Step 7, if the cleanliness of the pre-cooled water in the water tank is lower than the preset cleanliness, or reaches the set cleaning cycle time, empty the pre-cooled water in the water tank, and flush the water tank with the pre-cooled water other than the condensate water. After flushing, return to Step 1.

[0074] Specifically, according to the actual outdoor air quality and the dust content of fresh air in the local area, when the impurities in the water tank reach a certain amount and need to be cleaned, the system can be set to enter the automatic cleaning process regularly. For example, it can be set to be automatically cleaned once a month or once a quarter.

[0075] During flushing, open the No. I and No. II drain valves 21 and 22. At this time, the condensate water and / or tap water inside the water tank will be discharged from the drain valves. When the sewage is completely discharged, close the No. I and No. II drain valves, open the tap water makeup valve 18. Wait until the liquid level reaches the specified level, then close the tap water makeup valve 18 and flush it. After flushing, open the bottom drain valve to empty the sewage in the water tank. At this time, the flushing of the water tank is completed. After the flushing is completed, if it is necessary to continue precooling, then continue to execute Step 1.

[0076] The present invention adjusts the structure of the air treatment equipment itself. A water tank is arranged inside the air treatment equipment to reduce the system resistance. The condensate water is collected by using the gravity advantage as the water source for the incoming air precooling section. A air supply channel is arranged inside the water tank, and the low-temperature condensate water and the air entering from the air supply port form a countercurrent heat exchange inside the water tank. In addition, when the amount of condensate water is insufficient, tap water is supplemented into the water tank as a cold source, so as to achieve the effect of energy conservation and carbon reduction.

[0077] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A control method for an air handling device, the air handling device including an air inlet, an air outlet, and a heat exchanger assembly for generating condensed water in an air duct located between the air inlet and the air outlet, characterized in that, The air handling device further includes: a water tank, which is arranged between the air inlet and the heat exchanger assembly and is used for collecting pre-cooled water, and the pre-cooled water includes the condensed water generated by the heat exchanger assembly; at least one air supply duct, which penetrates through the water tank and communicates with the air duct between the air inlet and the heat exchanger assembly, so that the air entering from the air inlet exchanges pre-cooling heat with the pre-cooled water; The control method of the air handling device includes: Step 1, when the air handling device operates in refrigeration mode, if there is no pre-cooled water in the water tank, detect the inlet water temperature of the pre-cooled water other than the condensed water and the inlet air temperature of the air inlet; Step 2, if the inlet water temperature of the pre-cooled water other than the condensed water is lower than the inlet air temperature, collect the condensed water and the pre-cooled water other than the condensed water to the preset water level of the water tank to form a cold source for the pre-cooling section; Step 3, if the inlet water temperature of the pre-cooled water other than the condensed water is greater than or equal to the inlet air temperature, the water tank does not collect pre-cooled water; Step 4, monitor the water temperature at the outlet of the pre-cooled water in the water tank and the inlet air temperature of the air inlet; Step 5, if the water temperature at the outlet of the pre-cooled water in the water tank is greater than or equal to the inlet air temperature; Empty the pre-cooled water in the water tank and return to Step 1.

2. The control method of the air handling equipment according to claim 1, characterized in that, Heat exchange fins are provided on the outer circumferential wall of the air supply duct.

3. The control method of the air treatment device according to claim 2, characterized in that, A plurality of heat exchange fins are evenly arranged around the outer circumferential wall of the air supply duct, and the water flow channels formed between any two adjacent heat exchange fins are parallel to the axial direction of the air supply duct.

4. The control method of the air handling device according to claim 3, characterized in that, The heat exchange fins are multiple planes respectively arranged along different radial directions of the air supply duct, or the heat exchange fins are multiple curved surfaces with the same curvature extending outward from different radial positions of the air supply duct.

5. The control method of the air handling device according to claim 1, characterized in that, There are multiple air supply ducts, and the multiple air supply ducts are cylindrical with the same pipe diameter, and the center distance between adjacent air supply ducts is greater than or equal to 1.25D, where D is the pipe diameter of the air supply duct.

6. The control method of the air treatment device according to claim 1, characterized in that A water outlet for pre-cooled water is provided on one side of the water tank close to the air inlet, and a water inlet for the pre-cooled water is provided on the other side of the water tank far from the air inlet.

7. The control method of the air handling device according to claim 6, characterized in that, At least one baffle plate is provided in the water tank, and the baffle plate divides the water tank into a meandering water channel along the water inlet of the pre-cooled water to the water outlet of the pre-cooled water.

8. The control method of the air treatment device according to claim 7, characterized in that, The water inlet of the pre-cooled water is arranged close to the bottom of the water tank, and the baffle plate adjacent to the water inlet of the pre-cooled water extends from the bottom of the water tank towards its top, and the height of this baffle plate is less than the height of the top of the water tank.

9. The control method of the air handling device according to claim 8, characterized in that, When the number of baffle plates is odd, the water outlet of the pre-cooled water is arranged close to the bottom of the water tank.

10. The control method of the air treatment device according to claim 8, characterized in that, When the number of baffle plates is even, the water outlet of the pre-cooled water is arranged close to the top of the water tank.

11. The control method of the air handling device according to claim 8, characterized in that, Drain ports and drain valves are provided at the bottom of the water tank on both sides of the baffle plate extending from the bottom of the water tank towards its top.

12. The control method of the air treatment device according to claim 1, characterized in that, The water tank is communicated with a tap water make-up port, and the pre-cooled water further includes tap water.

13. The control method of the air treatment device according to any one of claims 1 to 12, characterized in that, The air duct between the air inlet and the air outlet includes upper and lower air ducts that are interconnected. The heat exchanger assembly and the air outlet are located in the upper air duct, the water tank and the air inlet are located in the lower air duct, and the condensed water generated by the heat exchanger assembly flows into the water tank by gravity.

14. The control method of the air handling device according to claim 13, characterized in that, The air handling device includes a fresh air conditioner.

15. The control method of the air treatment device according to claim 14, characterized in that, The heat exchanger assembly includes a heat exchanger assembly for generating condensed water in the outer circulation and a heat exchanger assembly for generating condensed water in the inner circulation.

16. The control method of the air treatment device according to claim 15, characterized in that, A bypass air valve for switching use with the heat exchanger is provided on one side of the heat exchanger of the heat exchanger assembly for generating condensed water in the outer circulation.

17. The control method of the air treatment device according to claim 1, characterized in that, The control method of the air handling equipment further includes: Step 6, monitoring the cleanliness of the precooled water in the water tank; Step 7, if the cleanliness of the precooled water in the water tank is lower than the preset cleanliness or reaches the set cleaning cycle time, empty the precooled water in the water tank, flush the water tank with precooled water other than condensed water, and then return to Step 1 after flushing is completed.

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