Fresh air ventilator, control method thereof and air conditioning system

Abstract

The invention provides a fresh air ventilator, a control method thereof and an air conditioning system. The fresh air ventilator comprises a shell; a heat pipe; and a flow rate adjusting mechanism. According to the fresh air machine, the control method thereof and the air conditioning system, the flow speed of the liquid working medium in the heat pipe is adjusted through the flow speed adjusting mechanism, so that passive flowing of the working medium in the heat pipe is converted into active flowing, the power of the liquid working medium is effectively improved, and then the heat exchange capacity of the heat pipe and the recovery capacity of energy in return air are improved; on the premise that indoor comfort is guaranteed, maximum energy conservation is achieved, the use experience of a user is improved, when the fresh air ventilator is applied to an air conditioning system with an indoor unit and an outdoor unit, the heat exchange capacity of the heat pipe can be used for reducing the load of the indoor unit, indoor unit control is linked, the indoor supercooling and superheating conditions are effectively avoided, and the indoor comfort is improved. Energy consumption of the outdoor unit and energy consumption of the air-conditioning system are reduced, and power consumption waste of the air-conditioning system is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air processing equipment, and in particular to a fresh air fan and a control method thereof, and an air conditioning system. Background Art

[0002] With the improvement of living standards, people have higher demands for a comfortable and healthy living environment. The independent design of the heat pipe fresh air fan ensures the air quality, while realizing energy recovery and temperature and humidity regulation. It is widely used in modern buildings.

[0003] However, the heat pipe fresh air fan in the existing technology only relies on the phase change of the liquid working fluid inside the heat pipe under the action of pressure difference to carry out heat exchange and energy recovery. There are problems such as insufficient power of liquid working fluid, low heat exchange efficiency and insufficient energy recovery. It is difficult to ensure indoor comfort and seriously affects the user experience. Summary of the invention

[0004] In order to solve the technical problem in the prior art that the heat exchange efficiency of the heat pipe type fresh air fan is low and affects the user experience, a fresh air fan and its control method and air conditioning system are provided which utilize a flow rate regulating mechanism to regulate the flow rate of the working medium in the heat pipe to improve the heat exchange efficiency.

[0005] A new air blower, comprising:

[0006] A housing having a fresh air passage and a return air passage formed therein;

[0007] A heat pipe, wherein the heat pipe is disposed in the housing, and part of the heat pipe is located in the fresh air passage, and part of the heat pipe is located in the return air passage;

[0008] A flow rate regulating mechanism is connected to the heat pipe and can regulate the flow rate of the working medium in the heat pipe.

[0009] The number of the heat pipes is at least two, all the heat pipes are arranged in parallel, and all the heat pipes are connected to the flow rate regulating mechanism.

[0010] The heat pipe includes a first heat exchange part, an insulating part, and a second heat exchange part. The first heat exchange part and the second heat exchange part are interconnected through the insulating part. The first heat exchange part is located in the fresh air channel, and the second heat exchange part is located in the return air channel. The flow rate regulating mechanism is connected to the first heat exchange part.

[0011] The first heat exchange part includes a reflux section and an outflow section, the first end of the reflux section is connected to the second heat exchange part through the insulation part, and the second end of the reflux section is connected to the first end of the outflow section through the flow rate regulating mechanism, and the second end of the outflow section is connected to the second heat exchange part through the insulation part.

[0012] The fresh air fan also includes a return main pipe and an outflow main pipe, all the return sections are connected to the flow rate regulating mechanism through the return main pipe, and all the outflow sections are connected to the flow rate regulating mechanism through the outflow main pipe.

[0013] The first heat exchange part is provided with a fin structure; and / or the second heat exchange part is provided with a fin structure.

[0014] The fresh air fan also includes a control device, which can obtain the outdoor fresh air temperature and the indoor return air temperature, and the control device is electrically connected to the flow rate regulating mechanism.

[0015] The fresh air fan also includes a fresh air temperature sensor. A fresh air inlet connected to the fresh air channel is provided on the shell. The fresh air temperature sensor is arranged in the fresh air channel, and the fresh air temperature sensor is located between the fresh air inlet and the heat pipe. The fresh air temperature sensor is electrically connected to the control device.

[0016] The fresh air fan also includes a return air temperature sensor. A return air inlet connected to the return air channel is provided on the shell. The return air temperature sensor is arranged in the return air channel, and the return air temperature sensor is located between the return air inlet and the heat pipe. The return air temperature sensor is electrically connected to the control device.

[0017] The flow rate regulating mechanism comprises a pump, and the rotation speed of the pump is adjustable.

[0018] A control method for the above-mentioned fresh air fan comprises:

[0019] Get the outdoor fresh air temperature Tfresh and the indoor return air temperature Treturn, and calculate the real-time temperature difference △T;

[0020] Match △T with the preset temperature difference;

[0021] The flow rate regulating mechanism is controlled according to the matching result.

[0022] The preset temperature difference includes a first preset difference T1, and controlling the flow rate regulating mechanism according to the matching result also includes:

[0023] When △T≤T1, the flow rate regulating mechanism is controlled to switch to a closed state;

[0024] When ΔT>T1, the flow rate regulating mechanism is controlled to work to increase the flow rate of the working medium in the heat pipe.

[0025] The first preset difference T1 has a value range of 2°C to 4°C.

[0026] When ΔT>T1, controlling the flow rate regulating mechanism to work also includes:

[0027] The flow rate regulating mechanism is controlled so that the flow rate of the working medium in the heat pipe is proportional to ΔT.

[0028] The preset temperature difference value further includes a second preset difference value T2, a third preset difference value T3, a fourth preset difference value T4, a fifth preset difference value T5 and a sixth preset difference value T6. The gears of the flow rate regulating mechanism include low gear, medium-low gear, medium gear, medium-high gear, high gear and super high gear. In controlling the flow rate regulating mechanism so that the flow rate of the working medium in the heat pipe is proportional to ΔT, it also includes:

[0029] If T1<△T≤T2, the flow rate regulating mechanism is controlled to switch to a low gear position;

[0030] If T2<△T≤T3, the flow rate regulating mechanism is controlled to switch to a medium or low gear position;

[0031] If T3<△T≤T4, the flow rate regulating mechanism is controlled to switch to the middle gear;

[0032] If T4<△T≤T5, the flow rate regulating mechanism is controlled to switch to a medium or high gear position;

[0033] If T5<△T≤T6, the flow rate regulating mechanism is controlled to switch to a high gear;

[0034] If △T>T6, the flow rate regulating mechanism is controlled to switch to the super high gear position;

[0035] Wherein, the flow rate regulating mechanism comprises a pump, the rotation speed of the pump is adjustable, and the rotation speed of the pump gradually increases in the order of low gear, medium-low gear, medium gear, medium-high gear, high gear and super high gear.

[0036] The value range of T2 is 4°C to 7°C;

[0037] and / or, T3 has a value ranging from 7°C to 9°C;

[0038] and / or, T4 has a value ranging from 9°C to 11°C;

[0039] and / or, T5 has a value ranging from 11°C to 13°C;

[0040] And / or, the value range of T6 is 13°C to 16°C.

[0041] The fresh air fan is applied to an air conditioning system, which further includes an indoor unit and an outdoor unit. After matching ΔT with a preset temperature difference, the system further includes:

[0042] Determine the energy consumption P of the heat pipe required for the flow rate regulating mechanism to correspond to ΔT;

[0043] Determine the heat exchange amount required by the indoor unit corresponding to △T, and determine the energy consumption Poutdoor unit required by the outdoor unit;

[0044] If P heat pipe < P outdoor unit, the flow rate regulating mechanism is turned on and the operating frequency of the outdoor unit is kept unchanged;

[0045] If P heat pipe ≥ P outdoor unit, the flow rate regulating mechanism is kept stopped and the operating frequency of the outdoor unit is increased.

[0046] An air conditioning system comprises the above-mentioned fresh air fan or a control method using the above-mentioned fresh air fan.

[0047] The fresh air fan and its control method, and the air-conditioning system provided by the present invention utilize a flow rate regulating mechanism to regulate the flow rate of the liquid working medium in the heat pipe, so that the flow of the working medium in the heat pipe is converted from passive to active, effectively improving the power of the liquid working medium, and then improving the heat exchange capacity of the heat pipe and the ability to recover energy in the return air, thereby achieving maximum energy saving while ensuring indoor comfort and improving the user experience. Moreover, when the fresh air fan is applied to an air-conditioning system with an indoor unit and an outdoor unit, the heat exchange capacity of the heat pipe can be used to reduce the load of the indoor unit, and the indoor unit control can be linked to effectively avoid overcooling and overheating in the room, reduce the energy consumption of the outdoor unit and the energy consumption of the air-conditioning system, and avoid power consumption waste of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic structural diagram of a fresh air fan provided by an embodiment of the present invention;

[0049] Figure 2 A schematic diagram of the structure of a heat pipe of a fresh air fan provided by an embodiment of the present invention;

[0050] Figure 3 A schematic diagram of the structure of a heat pipe and a flow rate regulating mechanism of a fresh air fan provided by an embodiment of the present invention;

[0051] Figure 4 A schematic diagram of the structure of a flow rate regulating mechanism and a return flow main pipe and an outflow flow main pipe provided in an embodiment of the present invention;

[0052] Figure 5 A control flow chart of a fresh air fan provided by an embodiment of the present invention;

[0053] Figure 6 Another control flow chart of the fresh air fan provided by the embodiment of the present invention;

[0054] In the figure:

[0055] 1. Shell; 11. Fresh air channel; 12. Return air channel; 2. Heat pipe; 3. Flow rate regulating mechanism; 21. First heat exchange part; 22. Insulation part; 23. Second heat exchange part; 211. Reflux section; 212. Outflow section; 41. Reflux main pipe; 42. Outflow main pipe; 5. Fresh air temperature sensor; 6. Return air temperature sensor. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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.

[0057] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0060] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The existing heat pipe type fresh air blower only relies on the phase change of the liquid working medium inside the heat pipe under the action of pressure difference to exchange heat and recover energy. There are problems such as insufficient power of the liquid working medium, low heat exchange efficiency, and insufficient energy recovery. It is difficult to ensure indoor comfort and seriously affect the user experience. Figures 1 to 6 The fresh air fan shown includes: a shell 1, in which a fresh air channel 11 and a return air channel 12 are formed; a heat pipe 2, which is arranged in the shell 1, and part of the heat pipe 2 is located in the fresh air channel 11, and part of the heat pipe 2 is located in the return air channel 12; a flow rate regulating mechanism 3, which is connected to the heat pipe 2, and the flow rate regulating mechanism 3 can adjust the flow rate of the working medium in the heat pipe 2. The flow rate regulating mechanism 3 is used to regulate the flow rate of the liquid working medium in the heat pipe 2, so that the flow of the working medium in the heat pipe 2 is transformed from passive to active, which effectively improves the power of the liquid working medium, and then improves the heat exchange capacity of the heat pipe 2 and the ability to recover energy in the return air, thereby achieving maximum energy saving while ensuring indoor comfort and improving the user experience. Moreover, when the fresh air fan is used in an air-conditioning system with an indoor unit and an outdoor unit, the heat exchange capacity of the heat pipe 2 can also be used to reduce the load of the indoor unit, and the indoor unit control is linked to effectively avoid overcooling and overheating in the room, reduce the energy consumption of the outdoor unit and the energy consumption of the air-conditioning system, and avoid power consumption waste of the air-conditioning system.

[0062] Among them, the number of the heat pipes 2 is at least two, all the heat pipes 2 are arranged in parallel, and all the heat pipes 2 are connected to the flow rate regulating mechanism 3. Multiple heat pipes 2 are used to improve the ability to exchange heat between fresh air and return air, further improve the heat recovery capacity of the fresh air fan, achieve maximum energy saving while ensuring indoor comfort, and improve the user experience.

[0063] The heat pipe 2 includes a first heat exchange part 21, an insulating part 22 and a second heat exchange part 23. The first heat exchange part 21 and the second heat exchange part 23 are interconnected through the insulating part 22. The first heat exchange part 21 is located in the fresh air channel 11, and the second heat exchange part 23 is located in the return air channel 12. The flow rate regulating mechanism 3 is connected to the first heat exchange part 21. A heat exchange medium flows in the heat pipe 2. When the heat exchange medium flows into the first heat exchange part 21, the heat exchange medium can release heat in the first heat exchange part 21 to heat the fresh air. At this time, the heat exchange medium condenses into a liquid state due to the heat release. When the heat exchange medium flows into the second heat exchange part 23, the return air absorbs heat from the heat exchange medium in the second heat exchange part 23 when passing through the second heat exchange part 23, thereby achieving the effect of recovering the heat of the return air. At this time, the heat exchange medium evaporates into a gaseous state due to the heat absorption. The pressure difference generated by the state change of the heat exchange medium is used to realize the passive flow of the heat exchange medium in the heat pipe 2. The insulation part 22 can avoid Heat is transferred between the first heat exchange part 21 and the second heat exchange part 23 through the tube wall of the heat pipe 2. Since the heat exchange medium is mostly in liquid state in the first heat exchange part 21, the flow rate regulating mechanism 3 is connected to the first heat exchange part 21, and the flow rate regulating mechanism 3 is used to drive the liquid heat exchange medium in the first heat exchange part 21, thereby improving the ability of the liquid heat exchange medium to flow to the second heat exchange part 23, thereby improving the flow rate of the heat exchange medium in the second heat exchange part 23, improving the heat exchange capacity of the heat pipe 2 and the ability to recover energy in the return air, achieving maximum energy saving while ensuring indoor comfort, and improving user experience.

[0064] Specifically, the shape of the heat pipe 2 is similar to a ring-shaped pipeline to ensure the circulation of the heat exchange medium, wherein the first heat exchange part 21 includes a reflux section 211 and an outlet section 212, the first end of the reflux section 211 is connected to the second heat exchange part 23 through the insulation part 22, and the second end of the reflux section 211 is connected to the first end of the outlet section 212 through the flow rate regulating mechanism 3, and the second end of the outlet section 212 is connected to the second heat exchange part 23 through the insulation part 22. By arranging the flow rate regulating mechanism 3 between the reflux section 211 and the outlet end, the flow rate regulating structure can reliably drive the liquid heat exchange medium in the first heat exchange part 21, thereby ensuring reliable flow rate regulation of the liquid heat exchange medium, and thereby reliably regulating and increasing the heat exchange capacity of the heat pipe 2.

[0065] Since the number of heat pipes 2 is at least two, all heat pipes 2 need to be connected to the flow rate regulating mechanism 3. In order to simplify the structure of the fresh air fan and also make the heat exchange efficiency of all heat pipes 2 basically the same, the fresh air fan also includes a reflux main pipe 41 and an outflow main pipe 42. All the reflux sections 211 are connected to the flow rate regulating mechanism 3 through the reflux main pipe 41, and all the outflow sections 212 are connected to the flow rate regulating mechanism 3 through the outflow main pipe 42. All heat pipes 2 are connected in parallel by using the return main pipe 41, and all heat pipes 2 are connected to the flow rate regulating mechanism 3. One flow rate regulating mechanism 3 can simultaneously adjust the flow rate of the heat exchange medium in all heat pipes 2, so that all heat pipes 2 can work synchronously and with the same efficiency, thereby ensuring the heat exchange efficiency of the fresh air fan. Moreover, since all heat pipes 2 are simultaneously connected to the flow rate regulating mechanism 3, the liquid medium between all heat pipes 2 can be mixed and then evenly distributed, thereby further ensuring that all heat pipes 2 can work synchronously and with the same efficiency, thereby ensuring the heat exchange efficiency of the fresh air fan.

[0066] like Figure 3 and Figure 4 As shown, the reflux main pipe 41 is connected to all reflux sections 211 through multiple reflux branch pipes, wherein the reflux sections 211 are capillary pipes to ensure reliable changes in the gas-liquid two-phase of the heat exchange medium.

[0067] The outflow main pipe 42 is connected to all outflow sections 212 through multiple outflow branch pipes, wherein the outflow sections 212 are capillary pipes to ensure reliable changes in the gas-liquid two-phase of the heat exchange medium.

[0068] The first heat exchange part 21 is provided with a fin structure. When the fin structure is used, the heat exchange area is increased from the pipe surface area of ​​the heat pipe 2 to the sum of the pipe surface area and the surface area of ​​the fin structure, thereby improving the heat transfer capacity between the heat exchange medium and the gas outside the heat pipe 2, thereby effectively improving the heat exchange efficiency of the heat pipe 2.

[0069] Similarly, a fin structure is provided on the second heat exchange portion 23. When the fin structure is used, the heat exchange area is increased from the pipe surface area of ​​the heat pipe 2 to the sum of the pipe surface area and the surface area of ​​the fin structure, thereby improving the heat transfer capacity between the heat exchange medium and the gas outside the heat pipe 2, thereby effectively improving the heat exchange efficiency of the heat pipe 2.

[0070] A partition is also provided in the shell 1 , which divides the shell 1 into a fresh air channel 11 and a return air channel 12 , and the partition is in contact with the insulation part 22 , thereby achieving reliable sealing of the fresh air channel 11 and the return air channel 12 .

[0071] The fresh air fan also includes a control device, which can obtain the outdoor fresh air temperature and the indoor return air temperature, and the control device is electrically connected to the flow rate regulating mechanism 3. The control device is used to control the flow rate regulating mechanism 3, so that the fresh air fan can automatically adjust according to the outdoor fresh air temperature and the indoor return air temperature, thereby improving the automation control level of the fresh air fan and the user experience.

[0072] Specifically, the fresh air machine further includes a fresh air temperature sensor 5. The housing 1 is provided with a fresh air inlet connected to the fresh air channel 11. The fresh air temperature sensor 5 is arranged in the fresh air channel 11, and the fresh air temperature sensor 5 is located between the fresh air inlet and the heat pipe 2. The fresh air temperature sensor 5 is electrically connected to the control device. The fresh air temperature sensor 5 is used to detect the temperature of the fresh air entering the fresh air channel 11 from the fresh air inlet, so as to obtain the outdoor fresh air temperature.

[0073] Similarly, the fresh air blower further includes a return air temperature sensor 6. The housing 1 is provided with a return air inlet connected to the return air channel 12. The return air temperature sensor 6 is arranged in the return air channel 12, and the return air temperature sensor 6 is located between the return air inlet and the heat pipe 2. The return air temperature sensor 6 is electrically connected to the control device. The return air temperature sensor 6 is used to detect the return air temperature entering the return air channel 12 from the return air inlet, so that the outdoor return air temperature can be obtained.

[0074] The flow rate regulating mechanism 3 includes a pump, and the speed of the pump is adjustable. By adjusting the speed of the pump, the flow rate of the fluid flowing through the pump is controlled, so as to achieve the purpose of controlling the flow rate of the liquid heat exchange medium in the heat pipe 2.

[0075] A control method for the above-mentioned fresh air fan comprises:

[0076] Get the outdoor fresh air temperature Tfresh and the indoor return air temperature Treturn, and calculate the real-time temperature difference △T;

[0077] Match △T with the preset temperature difference to determine the required heat exchange between the current outdoor fresh air temperature and the indoor return air temperature;

[0078] The flow rate regulating mechanism 3 is controlled according to the matching result to adjust the flow rate of the heat exchange medium in the heat pipe 2, thereby matching the heat exchange capacity of the heat pipe 2 with the required heat exchange amount, achieving maximum energy saving while ensuring indoor comfort and improving the user experience.

[0079] The preset temperature difference includes a first preset difference T1, and controlling the flow rate regulating mechanism 3 according to the matching result also includes:

[0080] When △T≤T1, it indicates that the heat exchange capacity of the automatic flow circulation of the heat exchange medium in the heat pipe 2 can meet the heat exchange capacity of the current △T, and the flow rate regulating mechanism 3 is controlled to switch to the closed state;

[0081] When ΔT>T1, the flow rate regulating mechanism 3 is controlled to work to increase the flow rate of the working medium in the heat pipe 2.

[0082] The first preset difference T1 has a value range of 2°C to 4°C, preferably 3°C.

[0083] When ΔT>T1, controlling the flow rate regulating mechanism 3 to work also includes:

[0084] The flow rate regulating mechanism 3 is controlled so that the flow rate of the working medium in the heat pipe 2 is proportional to ΔT, that is, the larger the value of ΔT is, the higher the required heat exchange amount is, and the higher the required flow rate of the heat exchange working medium in the heat pipe 2 is. Therefore, the flow rate regulating structure is controlled to proportionally control the flow rate of the heat exchange working medium in the heat pipe 2 according to the value of ΔT, so that the heat exchange capacity of the heat pipe 2 is always matched with the heat exchange amount required by ΔT, thereby improving the energy recovery rate and the user's comfort.

[0085] The preset temperature difference value further includes a second preset difference value T2, a third preset difference value T3, a fourth preset difference value T4, a fifth preset difference value T5 and a sixth preset difference value T6. The gears of the flow rate regulating mechanism 3 include low gear, medium-low gear, medium gear, medium-high gear, high gear and super high gear. In controlling the flow rate regulating mechanism 3 so that the flow rate of the working medium in the heat pipe 2 is proportional to ΔT, it also includes:

[0086] If T1<△T≤T2, the flow rate regulating mechanism 3 is controlled to switch to a low gear position;

[0087] If T2<△T≤T3, the flow rate regulating mechanism 3 is controlled to switch to a medium or low gear position;

[0088] If T3<△T≤T4, the flow rate regulating mechanism 3 is controlled to switch to the middle gear;

[0089] If T4<△T≤T5, the flow rate regulating mechanism 3 is controlled to switch to a medium or high gear position;

[0090] If T5<△T≤T6, the flow rate regulating mechanism 3 is controlled to switch to a high gear position;

[0091] If △T>T6, the flow rate regulating mechanism 3 is controlled to switch to the super high gear position;

[0092] Wherein, the flow rate regulating mechanism 3 includes a pump, the speed of the pump is adjustable, and the speed of the pump gradually increases in the order of low gear, medium-low gear, medium gear, medium-high gear, high gear and super high gear, that is, the speed of the pump corresponding to the low gear is S1, the speed of the pump corresponding to the medium-low gear is S2, the speed of the pump corresponding to the medium gear is S3, the speed of the pump corresponding to the medium-high gear is S4, the speed of the pump corresponding to the high gear is S5 and the speed of the pump corresponding to the super high gear is S6, wherein S1<S2<S3<S4<S5<S6.

[0093] The value range of T2 is 4°C to 7°C, preferably 6°C;

[0094] and / or, T3 is in the range of 7°C to 9°C, preferably 8°C;

[0095] and / or, T4 has a value ranging from 9°C to 11°C, preferably 10°C;

[0096] and / or, T5 has a value ranging from 11°C to 13°C, preferably 12°C;

[0097] And / or, the value range of T6 is 13°C to 16°C, preferably 14°C.

[0098] Example

[0099] After the fresh air fan is turned on, T fresh air and T return air are collected, and △T is calculated. When △T≤3℃, the pump is turned off, and the liquid working medium is self-circulated according to the temperature difference; when 3℃<△T≤5℃, the pump is turned on, and the gear is set to low gear (corresponding to the speed S1). At this time, the corresponding flow rate of the liquid heat exchange working medium in the heat pipe 2 is V1, and the heat exchanged and recovered by the fresh air fan is: Q1=mhA△T1; when 5℃<△T≤8℃, the pump gear is adjusted to medium and low gear (corresponding to the speed S2). At this time, the corresponding flow rate of the liquid heat exchange working medium in the heat pipe 2 is increased to V2, and the heat exchanged and recovered by the fresh air fan is: Q2=2mhA△T2. When 8℃<△T≤10℃, the pump gear is adjusted to medium gear (corresponding to the speed S3). At this time, the corresponding flow rate of the liquid heat exchange working medium in the heat pipe 2 is increased to V3, and the heat exchanged and recovered by the fresh air fan is: Q3=3mhA△T3. When 10℃<△T≤12℃, adjust the pump gear to medium-high (corresponding to the speed S4), at this time the flow rate of the liquid heat exchange medium in the heat pipe 2 is increased to V4, and the heat recovered by the fresh air fan is: Q4=4mhA△T4. When 12℃<△T≤14℃, adjust the pump gear to high (corresponding to the speed S5), at this time the flow rate of the liquid heat exchange medium in the heat pipe 2 is increased to V5, and the heat recovered by the fresh air fan is: Q5=5mhA△T5. When △T>14℃, adjust the pump gear to ultra-high (corresponding to the speed S6), at this time the flow rate of the liquid heat exchange medium in the heat pipe 2 is increased to V6, and the heat recovered by the fresh air fan is: Q6=6mhA△T6. The pump speed is adjusted according to different temperature differences △T, and the flow rate of the liquid heat exchange medium inside the heat pipe 2 is changed accordingly. The flow of the heat exchange medium is changed from passive to active, which can effectively improve the heat exchange capacity of the heat pipe 2, recover the energy in the exhaust air to the greatest extent, and achieve maximum energy saving.

[0100] Wherein, Q: heat exchange amount of heat pipe 2; h: heat exchange coefficient of heat pipe 2; A: effective heat exchange area of ​​heat pipe 2; m: dynamic coefficient.

[0101] The fresh air fan is applied to an air conditioning system, which further includes an indoor unit and an outdoor unit. After matching ΔT with a preset temperature difference, the system further includes:

[0102] Determine the energy consumption P heat pipe 2 that the flow rate regulating mechanism 3 needs to consume corresponding to ΔT. In the process of determining P heat pipe 2, first determine the gear position of the pump according to ΔT, and then calculate P heat pipe 2 according to the gear position of the pump;

[0103] Obtain the heat exchange △Q required by the indoor unit corresponding to △T, and determine the energy consumption Poutdoor unit required by the outdoor unit, wherein the heat exchange △Q required by the indoor unit corresponding to △T can be calculated through the heat difference. When the flow rate regulating mechanism 3 is not turned on, the heat exchange of the heat pipe 2 is Qoriginal=hA(Tfresh air-Treturn air), and after the pump speed is determined according to △T, it can be determined that the heat exchange of the heat pipe 2 after the flow rate regulating mechanism 3 is turned on is Qpump=amhA(Tfresh air-Treturn air), so that the heat difference △Q=Qpump-Qoriginal can be calculated, and then Poutdoor unit can be obtained according to the heat exchange △Q required by the indoor unit.

[0104] If P heat pipe 2 < P outdoor unit, it indicates that the energy consumption of opening the flow rate regulating mechanism 3 is lower than the energy consumption of regulating the outdoor unit, then the flow rate regulating mechanism 3 is opened, and the working frequency of the outdoor unit is kept unchanged, and the heat pipe 2 performs active heat exchange to reduce the overall energy consumption of the air-conditioning unit;

[0105] If P heat pipe 2 ≥ P outdoor unit, it indicates that the energy consumption of turning on the flow rate regulating mechanism 3 is higher than the energy consumption of regulating the outdoor unit. Then the flow rate regulating mechanism 3 is kept stopped and the operating frequency of the outdoor unit is increased. At this time, the heat pipe 2 only relies on the temperature difference and pressure difference as the power for circulating heat exchange, thereby reducing the overall energy consumption of the air-conditioning unit.

[0106] An air conditioning system comprises the above-mentioned fresh air fan or a control method using the above-mentioned fresh air fan.

[0107] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A new air blower, characterized in that: include: A housing (1), wherein a fresh air passage (11) and a return air passage (12) are formed in the housing (1); A heat pipe (2), the heat pipe (2) being arranged in the housing (1), with part of the heat pipe (2) being located in the fresh air passage (11), and part of the heat pipe (2) being located in the return air passage (12); A flow rate regulating mechanism (3), the flow rate regulating mechanism (3) is in communication with the heat pipe (2), and the flow rate regulating mechanism (3) is capable of regulating the flow rate of the working medium in the heat pipe (2).

2. The fresh air blower according to claim 1, characterized in that: The number of the heat pipes (2) is at least two, all the heat pipes (2) are arranged in parallel, and all the heat pipes (2) are connected to the flow rate regulating mechanism (3).

3. The fresh air blower according to claim 1 or 2, characterized in that: The heat pipe (2) comprises a first heat exchange portion (21), an insulating portion (22) and a second heat exchange portion (23); the first heat exchange portion (21) and the second heat exchange portion (23) are connected to each other via the insulating portion (22); the first heat exchange portion (21) is located in the fresh air passage (11), the second heat exchange portion (23) is located in the return air passage (12), and the flow rate regulating mechanism (3) is connected to the first heat exchange portion (21).

4. The fresh air blower according to claim 3, characterized in that: The first heat exchange section (21) comprises a reflux section (211) and an outflow section (212); the first end of the reflux section (211) is connected to the second heat exchange section (23) via the heat insulating section (22); the second end of the reflux section (211) is connected to the first end of the outflow section (212) via the flow rate regulating mechanism (3); and the second end of the outflow section (212) is connected to the second heat exchange section (23) via the heat insulating section (22).

5. The fresh air blower according to claim 4, characterized in that: The fresh air fan further comprises a return main pipe (41) and an outflow main pipe (42); all the return sections (211) are connected to the flow rate regulating mechanism (3) via the return main pipe (41); and all the outflow sections (212) are connected to the flow rate regulating mechanism (3) via the outflow main pipe (42).

6. The fresh air blower according to claim 3, characterized in that: The first heat exchange part (21) is provided with a fin structure; and / or the second heat exchange part (23) is provided with a fin structure.

7. The fresh air blower according to claim 1, characterized in that: The fresh air fan also includes a control device, which is capable of obtaining the outdoor fresh air temperature and the indoor return air temperature, and the control device is electrically connected to the flow rate regulating mechanism (3).

8. The fresh air blower according to claim 7, characterized in that: The fresh air fan further comprises a fresh air temperature sensor (5); a fresh air inlet connected to the fresh air channel (11) is provided on the housing (1); the fresh air temperature sensor (5) is arranged in the fresh air channel (11); the fresh air temperature sensor (5) is located between the fresh air inlet and the heat pipe (2); and the fresh air temperature sensor (5) is electrically connected to the control device.

9. The fresh air blower according to claim 7, characterized in that: The fresh air fan also includes a return air temperature sensor (6); the housing (1) is provided with a return air inlet connected to the return air channel (12); the return air temperature sensor (6) is arranged in the return air channel (12), and the return air temperature sensor (6) is located between the return air inlet and the heat pipe (2); the return air temperature sensor (6) is electrically connected to the control device.

10. The fresh air blower according to claim 1, characterized in that: The flow rate regulating mechanism (3) comprises a pump, and the rotation speed of the pump is adjustable.

11. A control method for a fresh air blower according to any one of claims 1 to 10, characterized in that: include: Get the outdoor fresh air temperature Tfresh and the indoor return air temperature Treturn, and calculate the real-time temperature difference △T; Match △T with the preset temperature difference; The flow rate regulating mechanism (3) is controlled according to the matching result.

12. The control method of the fresh air blower according to claim 11, characterized in that: The preset temperature difference includes a first preset difference T1, and controlling the flow rate regulating mechanism (3) according to the matching result also includes: When △T≤T1, the flow rate regulating mechanism (3) is controlled to switch to a closed state; When ΔT>T1, the flow rate regulating mechanism (3) is controlled to operate so as to increase the flow rate of the working medium in the heat pipe (2).

13. The control method of the fresh air blower according to claim 12, characterized in that: The first preset difference T1 has a value range of 2°C to 4°C.

14. The control method of the fresh air blower according to claim 12, characterized in that: When ΔT>T1, controlling the flow rate regulating mechanism (3) to operate further comprises: The flow rate regulating mechanism (3) is controlled so that the flow rate of the working medium in the heat pipe (2) is proportional to ΔT.

15. The control method of the fresh air blower according to claim 14, characterized in that: The preset temperature difference value further includes a second preset difference value T2, a third preset difference value T3, a fourth preset difference value T4, a fifth preset difference value T5 and a sixth preset difference value T6. The gear positions of the flow rate regulating mechanism (3) include low gear, medium-low gear, medium gear, medium-high gear, high gear and super high gear. In controlling the flow rate regulating mechanism (3) so that the flow rate of the working medium in the heat pipe (2) is proportional to ΔT, the following further includes: If T1<△T≤T2, the flow rate regulating mechanism (3) is controlled to switch to a low gear position; If T2<△T≤T3, the flow rate regulating mechanism (3) is controlled to switch to a medium or low gear position; If T3<△T≤T4, the flow rate regulating mechanism (3) is controlled to switch to a middle gear; If T4<△T≤T5, the flow rate regulating mechanism (3) is controlled to switch to a medium or high gear position; If T5<△T≤T6, the flow rate regulating mechanism (3) is controlled to switch to a high gear position; If △T>T6, the flow rate regulating mechanism (3) is controlled to switch to the super high gear position; The flow rate regulating mechanism (3) comprises a pump, the rotation speed of the pump is adjustable, and the rotation speed of the pump gradually increases in the order of low gear, medium-low gear, medium gear, medium-high gear, high gear and super high gear.

16. The control method of the fresh air blower according to claim 15, characterized in that: The value range of T2 is 4°C to 7°C; and / or, T3 has a value ranging from 7°C to 9°C; and / or, T4 has a value ranging from 9°C to 11°C; and / or, T5 has a value ranging from 11°C to 13°C; And / or, the value range of T6 is 13°C to 16°C.

17. The control method of the fresh air blower according to claim 11, characterized in that: The fresh air fan is applied to an air conditioning system, which further includes an indoor unit and an outdoor unit. After matching ΔT with a preset temperature difference, the system further includes: Determine the energy consumption P of the heat pipe required for the flow rate regulating mechanism (3) to correspond to ΔT; Determine the heat exchange amount required by the indoor unit corresponding to △T, and determine the energy consumption Poutdoor unit required by the outdoor unit; If P heat pipe < P outdoor unit, the flow rate regulating mechanism (3) is turned on and the operating frequency of the outdoor unit is kept unchanged; If P heat pipe ≥ P outdoor unit, the flow rate regulating mechanism (3) is kept stopped and the operating frequency of the outdoor unit is increased.

18. An air conditioning system, characterized in that: A control method comprising the fresh air fan described in any one of claims 1 to 10 or applying the fresh air fan described in any one of claims 11 to 17.

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