Fresh air equipment and control method thereof

Abstract

The invention discloses fresh air equipment and a control method thereof. The fresh air equipment comprises a reheating coil pipe, an evaporator, a first valve pipeline, a second valve pipeline and a control module, the reheating coil pipe communicates with the first valve pipeline and the second valve pipeline, the first valve pipeline communicates with a first refrigerant pipe, the evaporator communicates with a second refrigerant pipe and the second valve pipeline, and the control module is configured to control the reheating coil pipe. Under the condition that the fresh air equipment is in a refrigeration mode, the first valve pipeline is controlled to communicate with the reheating coil pipe and the first refrigerant pipe at a first opening degree, the second valve pipeline is controlled to communicate with the reheating coil pipe and the evaporator, and under the condition that the fresh air equipment is in a dehumidification reheating mode, the first valve pipeline is controlled to communicate with the reheating coil pipe and the first refrigerant pipe, and the second valve pipeline is controlled to communicate with the second refrigerant pipe; and the second valve pipeline is controlled to conduct the reheating coil pipe and the evaporator at the second opening degree. According to the fresh air equipment, the overall energy consumption and the maintenance cost generated when a user conducts air conditioning can be reduced easily.

Description

Technical Field

[0001] This invention relates to the field of fresh air equipment technology, and in particular to a fresh air equipment and its control method. Background Technology

[0002] As people's living standards improve, users' demands for air conditioning systems are also increasing, especially for indoor air quality. Therefore, fresh air handling units have emerged. In related technologies, fresh air handling units primarily dehumidify fresh air, but they cannot simultaneously meet the requirements of cooling, dehumidification and reheating, and heating modes, resulting in high energy consumption. Therefore, it is necessary to design a fresh air handling unit that can simultaneously meet the requirements of cooling, dehumidification and reheating, and heating modes to reduce system energy consumption and costs, and improve market competitiveness and user experience. Summary of the Invention

[0003] The present invention provides a fresh air device and its control method to solve at least one of the above-mentioned technical problems.

[0004] This invention provides a fresh air device, comprising a reheat coil, an evaporator, a first valve pipeline, a second valve pipeline, and a control module. The fresh air device forms a fresh air cavity, with the reheat coil and the evaporator disposed within the cavity. The reheat coil is connected to one end of the first valve pipeline and one end of the second valve pipeline, respectively. The other end of the first valve pipeline is connected to a first refrigerant pipeline. The evaporator is connected to the other end of the second refrigerant pipeline and the second valve pipeline, respectively. The fresh air device has a cooling mode and a dehumidification-reheat mode. The control module... The device is configured to, when the fresh air unit is in the cooling mode, control the first valve pipeline to connect the reheat coil and the first refrigerant pipe at a first opening degree, and control the second valve pipeline to connect the reheat coil and the evaporator, wherein the first opening degree is less than 100%; and when the fresh air unit is in the dehumidification and reheat mode, control the first valve pipeline to connect the reheat coil and the first refrigerant pipe, and control the second valve pipeline to connect the reheat coil and the evaporator at a second opening degree, wherein the second opening degree is less than 100%.

[0005] The aforementioned fresh air system, in dehumidification mode, can first cool the fresh air to dehumidify it, and then heat it, achieving the effect of dehumidification and reheating. While ensuring that the temperature of the fresh air reaches the expected level, it can also adjust the humidity of the fresh air. In cooling mode, the fresh air system can cool the fresh air while it is being introduced. In this way, it can achieve both dehumidification and, to a certain extent, cooling effects. Users do not need to turn on additional cooling equipment to cool the indoor air, which helps to reduce the overall energy consumption and maintenance costs incurred by users when adjusting the air.

[0006] In one optional technical solution of the present invention, the first valve pipeline includes a first branch and a second branch, the first branch and the second branch being respectively connected to the first refrigerant pipe and the reheat coil. The first branch is provided with a first expansion valve, and the second branch is provided with a first solenoid valve. The control module is configured to, when the fresh air equipment is in the cooling mode, control the first expansion valve to open at the first opening degree to conduct the first branch, and control the first solenoid valve to close the second branch; and, when the fresh air equipment is in the dehumidification and reheat mode, control the first expansion valve to close the first branch, and control the first solenoid valve to open to conduct the second branch.

[0007] In one optional technical solution of the present invention, the second valve pipeline is provided with a second expansion valve, and the control module is configured to, when the fresh air equipment is in the cooling mode, control the second expansion valve to fully open to conduct the second valve pipeline, and when the fresh air equipment is in the dehumidification and reheat mode, control the second expansion valve to open at the second opening degree to conduct the second valve pipeline.

[0008] In one optional technical solution of the present invention, the second valve pipeline includes a third branch and a fourth branch, the third branch and the fourth branch being respectively connected to the reheat coil and the evaporator. The third branch is provided with a third expansion valve, and the fourth branch is provided with a second solenoid valve. The control module is configured to, when the fresh air equipment is in the cooling mode, control the third expansion valve to close to shut off the third branch and control the second solenoid valve to open to conduct the fourth branch; and, when the fresh air equipment is in the dehumidification and reheat mode, control the third expansion valve to open to the second opening degree to conduct the third branch and control the second solenoid valve to close off to shut off the fourth branch.

[0009] In an optional technical solution of the present invention, the fresh air equipment further has a heating mode, and the control module is configured to, when the fresh air equipment is in the heating mode, control the first valve pipeline to connect the reheat coil and the first refrigerant pipe, and control the second valve pipeline to connect the reheat coil and the evaporator.

[0010] In one optional technical solution of the present invention, the fresh air device is provided with an air inlet, a return air inlet and an air outlet. The air inlet and the return air inlet are connected to the fresh air cavity on one side, and the air outlet is connected to the fresh air cavity on the other side. When the fresh air device is in the dehumidification and reheating mode, the fresh air device can dehumidify and reheat the outdoor air flowing into the fresh air cavity from at least one of the air inlet and the return air inlet, and discharge the treated air from the air outlet.

[0011] In one optional technical solution of the present invention, the fresh air device includes a humidification module disposed in the fresh air cavity and located between the reheat coil and the air outlet. The control module is further configured to control the humidification module to humidify the air when the fresh air device is in the dehumidification and reheat mode.

[0012] This invention provides a control method for a fresh air system. The fresh air system includes a reheat coil, an evaporator, a first valve pipe, and a second valve pipe. The fresh air system forms a fresh air cavity. The reheat coil and the evaporator are disposed within the fresh air cavity. The reheat coil is connected to one end of the first valve pipe and one end of the second valve pipe, respectively. The other end of the first valve pipe is connected to a first refrigerant pipe. The evaporator is connected to the other end of the second refrigerant pipe and the second valve pipe, respectively. The control method includes: executing a corresponding mode of the fresh air system based on an acquired air conditioning signal. The fresh air system has a cooling mode and a dehumidification and reheat mode. When the fresh air system is in the cooling mode, the first valve pipeline is controlled to connect the reheat coil and the first refrigerant pipe at a first opening degree, and the second valve pipeline is controlled to connect the reheat coil and the evaporator, wherein the first opening degree is less than 100%. When the fresh air system is in the dehumidification and reheat mode, the first valve pipeline is controlled to connect the reheat coil and the first refrigerant pipe, and the second valve pipeline is controlled to connect the reheat coil and the evaporator at a second opening degree, wherein the second opening degree is less than 100%.

[0013] The above control method, in dehumidification mode, can first cool the fresh air to dehumidify it, and then heat the fresh air to achieve the effect of dehumidification and reheating. Under the premise that the temperature of the fresh air reaches the expected level, the humidity of the fresh air can be adjusted. In cooling mode, the fresh air equipment can cool the fresh air while it is introducing fresh air. In this way, it can achieve the effect of fresh air dehumidification and, to a certain extent, also achieve the effect of fresh air cooling. Users do not need to turn on other cooling equipment to cool the indoor air, which helps to reduce the overall energy consumption and maintenance costs incurred by users when adjusting the air.

[0014] In one optional technical solution of the present invention, the control method includes: generating the air conditioning signal based on a set temperature and a set humidity, wherein the set temperature and the set humidity can be determined by a setting request issued by a user, or the air conditioning signal can be generated based on the current temperature and current humidity of the indoor space.

[0015] The present invention provides a fresh air device, which includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the steps of the control method described in any of the above optional technical solutions.

[0016] The aforementioned fresh air system, in dehumidification mode, can first cool the fresh air to dehumidify it, and then heat it, achieving the effect of dehumidification and reheating. While ensuring that the temperature of the fresh air reaches the expected level, it can also adjust the humidity of the fresh air. In cooling mode, the fresh air system can cool the fresh air while it is being introduced. In this way, it can achieve both dehumidification and, to a certain extent, cooling effects. Users do not need to turn on additional cooling equipment to cool the indoor air, which helps to reduce the overall energy consumption and maintenance costs incurred by users when adjusting the air.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a partial structural schematic diagram of the fresh air device according to an embodiment of the present invention; Figure 2 This is another structural schematic diagram of the fresh air device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the modules of the fresh air equipment according to an embodiment of the present invention; Figure 4 This is a flowchart illustrating the control method of the fresh air equipment according to an embodiment of the present invention; Figure 5 This is another schematic flowchart of the control method for the fresh air equipment according to an embodiment of the present invention; Figure 6 This is a schematic diagram of another module of the fresh air equipment according to an embodiment of the present invention.

[0019] Explanation of key component symbols: Fresh air equipment 100; fresh air cavity 101, first refrigerant pipe 102, second refrigerant pipe 103, air inlet 104, return air outlet 105, air outlet 106, filter screen 107, fan 108; Reheat coil 110; Evaporator 120; First valve pipeline 130, first branch 131, second branch 132, first expansion valve 133, first solenoid valve 134; Second valve pipeline 140, second expansion valve 141, third branch 142, fourth branch 143, third expansion valve 144, second solenoid valve 145; Control module 150; Humidification module 160; Compressor 201, oil separator 202, four-way valve 203, condenser 204, one-way valve 205, fourth expansion valve 206; Memory 301, processor 302. Detailed Implementation

[0020] In the description of this invention, some of the disclosed content has been shown accordingly in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description with reference to the accompanying drawings is exemplary and is only used to explain the invention, and should not be construed as limiting the invention.

[0021] In the description of this invention, many different contents or examples are disclosed to implement different structures of the invention. To simplify the disclosure of this invention, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit the invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In the description of this invention, it should be understood that terms used to indicate orientation or positional relationships (such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc.) are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and understanding the corresponding embodiments, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, terms used to indicate orientation or positional relationships should not be construed as limitations on this invention.

[0024] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] Please refer to Figures 1 to 3 A fresh air device 100 of the present invention may include a reheat coil 110, an evaporator 120, a first valve pipe 130, a second valve pipe 140, and a control module 150. The fresh air device 100 forms a fresh air cavity 101. The reheat coil 110 and the evaporator 120 are disposed within the fresh air cavity 101. The reheat coil 110 is connected to one end of the first valve pipe 130 and one end of the second valve pipe 140, respectively. The other end of the first valve pipe 130 is connected to a first refrigerant pipe 102, and the evaporator 120 is connected to the other end of the second refrigerant pipe 103 and the second valve pipe 140, respectively.

[0026] The fresh air unit 100 has a cooling mode and a dehumidification / reheating mode. The control module 150 is configured to, when the fresh air unit 100 is in cooling mode, control the first valve pipe 130 to conduct the reheat coil 110 and the first refrigerant pipe 102 at a first opening degree, and control the second valve pipe 140 to conduct the reheat coil 110 and the evaporator 120, with the first opening degree being less than 100%; and, when the fresh air unit 100 is in dehumidification / reheating mode, control the first valve pipe 130 to conduct the reheat coil 110 and the first refrigerant pipe 102, and control the second valve pipe 140 to conduct the reheat coil 110 and the evaporator 120 at a second opening degree, with the second opening degree being less than 100%.

[0027] The aforementioned fresh air device 100, in dehumidification mode, can first cool the fresh air to dehumidify it, and then heat the fresh air to achieve the effect of dehumidification and reheating. Under the premise that the temperature of the fresh air reaches the expected level, it can adjust the humidity of the fresh air. In cooling mode, the fresh air device 100 can cool the fresh air while it is introducing fresh air. In this way, it can achieve the effect of fresh air dehumidification and, to a certain extent, also achieve the effect of fresh air cooling. Users do not need to turn on other cooling equipment to cool the indoor air, which helps to reduce the overall energy consumption and maintenance costs incurred by users when adjusting the air.

[0028] Specifically, in Figure 1 In the case of fresh air equipment 100 in cooling mode or dehumidification and reheat mode, high-temperature and high-pressure liquid refrigerant can be introduced into the first refrigerant pipe 102. After the refrigerant flows through the reheat coil 110 and evaporator 120 in sequence, it will form gaseous refrigerant due to heat exchange and can be discharged from the second refrigerant pipe 103.

[0029] Correspondingly, when the fresh air unit 100 is in cooling mode, the first valve pipe 130 will open to the reheat coil 110 and the first refrigerant pipe 102. Since the first valve pipe 130 is not fully open, the refrigerant experiences a sudden change in flow rate when passing through the first valve pipe 130, resulting in a sudden change in pressure. This sudden pressure change causes the liquid refrigerant to expand and atomize. When the refrigerant enters the reheat coil 110, the pressure drop causes it to absorb heat within the reheat coil 110. After absorbing heat to a certain extent within the reheat coil 110, the refrigerant will exit the reheat coil 110 through the second valve pipe 140 and flow into the evaporator 120, where it will absorb heat again. Finally, after absorbing heat in the evaporator 120, the refrigerant will exit as a gas from the second refrigerant pipe 103. In this way, the refrigerant will absorb heat successively in the reheat coil 110 and the evaporator 120, thereby cooling the fresh air entering the fresh air cavity 101 and achieving the effect of cooling the fresh air.

[0030] The first opening degree can be fixed or adjusted according to different specific circumstances. The first opening degree can be determined by the control module 150.

[0031] Furthermore, when the fresh air unit 100 is in dehumidification and reheat mode, the first valve pipe 130 will be fully opened to connect the reheat coil 110 and the first refrigerant pipe 102, allowing the high-temperature liquid refrigerant to directly enter the reheat coil 110 to release heat. It then exits from the reheat coil 110 and flows into the evaporator 120 along the second valve pipe 140. Because the second valve pipe 140 is not fully open, the refrigerant experiences a sudden change in flow rate as it passes through it, resulting in a sudden change in pressure. This sudden pressure change causes the liquid refrigerant to expand and atomize. When the refrigerant enters the evaporator 120, the pressure decreases, causing the refrigerant to absorb heat within the evaporator 120. After absorbing heat to a certain extent within the evaporator 120, the refrigerant is discharged from the evaporator 120 in gaseous form along the second refrigerant pipe 103. In this way, the refrigerant absorbs heat in the evaporator 120 and releases heat in the reheat coil 110. For the fresh air entering the fresh air cavity 101, it will first be cooled by the evaporator 120, so that the water vapor in the fresh air will liquefy upon cooling and separate from the air, thus achieving the effect of dehumidification. Then, the fresh air will be heated by the reheat coil 110, so that the temperature of the cooled fresh air can return to the temperature before cooling or reach a certain set temperature, and then be discharged from the fresh air cavity 101 into the corresponding space (such as indoors). Under the premise that the fresh air temperature remains basically unchanged or reaches the corresponding temperature, the humidity of the fresh air can be reduced, thereby achieving the effect of dehumidifying and reheating the fresh air.

[0032] The second opening degree can be fixed or adjusted according to different specific circumstances. The second opening degree can be determined by the control module 150.

[0033] Based on the above, since the fresh air equipment 100 can integrate cooling mode and dehumidification and reheating mode, it can independently achieve the cooling and dehumidification and reheating effects on fresh air. Compared with related technologies, it does not require the installation of independent cooling and heating control units, which can reduce the user's maintenance and operation costs and the energy consumption of the air conditioning system.

[0034] In addition, Figure 1 and Figure 2In this system, the fresh air unit 100 may include a compressor 201, an oil separator 202, a four-way valve 203, a condenser 204, and a one-way valve 205. Specifically, the compressor 201 compresses the refrigerant to form a high-temperature, high-pressure gaseous-liquid mixture. The refrigerant undergoes gas-liquid separation through the oil separator 202. The gaseous refrigerant then enters the condenser 204 through the four-way valve 203 for condensation and heat release, forming a high-temperature, high-pressure liquid refrigerant. The liquid refrigerant then flows through the one-way valve 205 and along the first refrigerant pipe 102 into the first valve pipe 130. The refrigerant discharged from the second refrigerant system returns to the compressor 201 through the four-way valve 203 for the next compression cycle.

[0035] Please refer to Figures 1 to 3 In some cases, the first valve pipeline 130 includes a first branch 131 and a second branch 132. The first branch 131 and the second branch 132 are respectively connected to the first refrigerant pipeline 102 and the reheat coil 110. The first branch 131 is provided with a first expansion valve 133. The second branch 132 is provided with a first solenoid valve 134. The control module 150 is configured to, when the fresh air equipment 100 is in cooling mode, control the first expansion valve 133 to open to a first degree to conduct the first branch 131, and control the first solenoid valve 134 to close to shut off the second branch 132; and, when the fresh air equipment 100 is in dehumidification and reheat mode, control the first expansion valve 133 to close to shut off the first branch 131, and control the first solenoid valve 134 to open to conduct the second branch 132.

[0036] In this way, the piping structure can be simplified to a certain extent while simply implementing the cooling mode and dehumidification and reheat mode of the fresh air equipment 100.

[0037] Specifically, in Figure 1 and Figure 2 In this configuration, the first branch 131 and the second branch 132 can be connected in parallel to the first refrigerant pipe 102 and the reheat coil 110. The expansion valve can be opened at different degrees. The first opening degree can range from 0 to 100%. The solenoid valve, however, can only switch between fully closed and fully open states.

[0038] In cooling mode, the first expansion valve 133 opens to the first degree, while the first solenoid valve 134 closes, allowing the refrigerant to flow into the reheat coil 110 only along the first branch 131. Due to the influence of the opening degree of the first expansion valve 133 on the refrigerant pressure, the refrigerant absorbs heat when entering the reheat coil 110. When the refrigerant enters the evaporator 120, the refrigerant pressure further decreases, thus continuing to absorb heat in the evaporator 120. In other words, the evaporator 120 and the reheat coil 110 achieve a full cooling effect on the fresh air, which helps to effectively reduce the temperature of the fresh air.

[0039] In dehumidification and reheat mode, the first expansion valve 133 will be closed and the first solenoid valve 134 will be opened, so that the pressure of the liquid refrigerant remains basically unchanged. After entering the reheat coil 110, it will release heat and then be affected by the second valve pipeline 140 to reduce pressure and absorb heat. When the refrigerant flows into the evaporator 120, it will absorb the heat in the fresh air around the evaporator 120, thereby achieving the effect of dehumidifying and reheating the fresh air.

[0040] It is understandable that by setting up the first branch 131 and the second branch 132, it is not necessary to specifically introduce low-temperature refrigerant and high-temperature refrigerant into the fresh air equipment 100 for cooling and dehumidification and reheating respectively. Compared with the three-pipe equipment in related technologies, it can reduce the pipeline structure that needs to be designed, and achieve the effect of simplifying the equipment pipeline.

[0041] Please refer to Figure 1 and Figure 3 In some cases, the second valve line 140 is provided with a second expansion valve 141. The control module 150 is configured to, when the fresh air equipment 100 is in cooling mode, control the second expansion valve 141 to fully open to conduct the second valve line 140; and, when the fresh air equipment 100 is in dehumidification and reheat mode, control the second expansion valve 141 to open to a second degree to conduct the second valve line 140.

[0042] This simplifies the pipeline structure and improves the reliability of valve control to some extent.

[0043] It is understandable that, since the expansion valve can achieve stepless adjustment between different opening degrees, and the expansion valve itself can be completely closed and completely open, depending on the mode entered by the fresh air equipment 100, the second expansion valve 141 can be controlled to be fully open or open at a second opening degree. Moreover, the pressure of the refrigerant will be reduced to a certain extent after passing through the reheat coil 110. When the refrigerant flows through the second valve pipeline 140, it is not easy to cause a large impact on the second solenoid valve 145. Thus, when the second valve pipeline 140 is only completely closed, fully opened, and opened at a second opening degree through the second expansion valve 141, the number of valves that need to be set and controlled on the second valve pipeline 140 can be reduced without causing excessive wear on the second expansion valve 141. This simplifies the pipeline structure and improves the control reliability of the valve to a certain extent.

[0044] Please refer to Figure 2 and Figure 3In some cases, the second valve line 140 includes a third branch 142 and a fourth branch 143. The third branch 142 and the fourth branch 143 are respectively connected to the reheat coil 110 and the evaporator 120. The third branch 142 is provided with a third expansion valve 144. The fourth branch 143 is provided with a second solenoid valve 145. The control module 150 is configured to, when the fresh air equipment 100 is in cooling mode, control the third expansion valve 144 to close the third branch 142 and control the second solenoid valve 145 to open the fourth branch 143; and, when the fresh air equipment 100 is in dehumidification and reheat mode, control the third expansion valve 144 to open to a second opening degree to open the third branch 142 and control the second solenoid valve 145 to close the fourth branch 143.

[0045] This can improve the response speed of the second valve pipeline 140 in cooling mode and extend the service life of the third expansion valve 144.

[0046] Specifically, in cooling mode, when the refrigerant flows from the reheat coil 110 to the evaporator 120, the second solenoid valve 145 is opened to connect the reheat coil 110 and the evaporator 120. Compared with the expansion valve, the solenoid valve has a faster control response speed, which allows the refrigerant to flow quickly through the second valve line 140. Moreover, the third expansion valve 144 is not subjected to the impact of refrigerant pressure during the opening process, which can reduce the wear of the third expansion valve 144 and thus help to improve the service life of the third expansion valve 144.

[0047] Please refer to Figure 3 In some cases, the fresh air unit 100 also has a heating mode. The control module 150 is configured to, when the fresh air unit 100 is in heating mode, control the first valve pipe 130 to connect the reheat coil 110 and the first refrigerant pipe 102, and control the second valve pipe 140 to connect the reheat coil 110 and the evaporator 120.

[0048] In this way, the heating effect of a fresh air system 100 can be easily achieved.

[0049] Specifically, specifically, in Figure 2 In the case of the fresh air equipment 100 being in heating mode, high-temperature and high-pressure gaseous refrigerant can be introduced into the second refrigerant pipe 103. After the refrigerant flows through the evaporator 120 and the reheat coil 110 in sequence, it will form liquid refrigerant due to heat exchange and can be discharged from the first refrigerant pipe 102.

[0050] Correspondingly, when the fresh air equipment 100 is in heating mode, both the first valve pipeline 130 and the second valve pipeline 140 are opened and connected, allowing the high-temperature and high-pressure gaseous refrigerant to pass through the evaporator 120 and the reheat coil 110 in sequence. During this process, the refrigerant pressure will not change suddenly due to the throttling effect of the valves, thus allowing the refrigerant to release heat in the evaporator 120 and the reheat coil 110 in sequence, raising the temperature of the fresh air in the fresh air cavity 101, thereby achieving the effect of heating the fresh air.

[0051] Please combine Figure 2 In some cases, when the fresh air unit 100 is in heating mode, it can control the first expansion valve 133 on the first valve line 130 to close and the first solenoid valve 134 to open, and control the third expansion valve 144 on the second valve line 140 to close and the second solenoid valve 145 to open. In other words, it can be controlled through... Figure 2 The fresh air device 100 shown is used to implement the heating mode of the fresh air device 100.

[0052] In addition, Figure 1 and Figure 2 In this system, the fresh air unit 100 may include a fourth expansion valve 206. The fourth expansion valve 206 and the one-way valve 205 may be located on two parallel branches. Specifically, the compressor 201 compresses the refrigerant to form a high-temperature, high-pressure gaseous-liquid mixture. The refrigerant undergoes gas-liquid separation via an oil separator 202. The gaseous refrigerant then flows through a four-way valve 203 along the second refrigerant pipe 103 into the evaporator 120 and reheat coil 110 for condensation and heat release, forming a high-temperature, high-pressure liquid refrigerant. The liquid refrigerant then flows along the first refrigerant pipe 102 through the fourth expansion valve 206, where it is depressurized and atomized by the throttling effect of the fourth expansion valve 206, and enters the condenser 204 for heat absorption and vaporization, forming a gaseous refrigerant. The gaseous refrigerant then returns to the compressor 201 through the four-way valve 203 for the next compression cycle.

[0053] Furthermore, it is understood that the present invention can release heat to the fresh air through the high-temperature and high-pressure refrigerant generated by the compressor 201, which has a large energy efficiency ratio. Compared with related technologies, it does not require direct electric heating of the fresh air, nor does it require turning on other air conditioning equipment to heat the indoor space, thereby minimizing the energy consumption of the air conditioning system and the user's operation and maintenance costs.

[0054] Please refer to Figure 1 and Figure 2In some cases, the fresh air unit 100 is provided with an air inlet 104, a return air inlet 105, and an air outlet 106. The air inlet 104 and the return air inlet 105 are connected to the fresh air cavity 101 on one side. The air outlet 106 is connected to the fresh air cavity 101 on the other side. When the fresh air unit 100 is in dehumidification and reheating mode, the fresh air unit 100 can dehumidify and reheat the outdoor air flowing into the fresh air cavity 101 from at least one of the air inlet 104 and the return air inlet 105, and discharge the treated air from the air outlet 106.

[0055] In this way, the fresh air efficiency in the dehumidification and reheat mode can be adjusted according to the specific situation.

[0056] Specifically, in Figure 1 and Figure 2 In this system, the fresh air unit 100 can connect to the outdoor space through the air inlet 104, and to the indoor space through the return air inlet 105 and the air outlet 106. When the fresh air unit 100 is in dehumidification and reheat mode, it can introduce outdoor air only through the air inlet 104, indoor air only through the return air inlet 105, or both outdoor and indoor air can be introduced through the air inlet 104 and the return air inlet 105 respectively. This allows for a corresponding change in the fresh air introduction speed, which in turn can be coordinated with the heat exchange speed of the evaporator 120 and the reheat coil 110 to adjust the fresh air flow rate for dehumidification and reheat, thereby regulating the fresh air efficiency in dehumidification and reheat mode.

[0057] In addition, Figure 1 and Figure 2 In this system, the fresh air unit 100 may include a filter 107 and a fan 108. The filter 107 may be disposed within the fresh air chamber 101 between the air inlet 104, the return air inlet 105, and the evaporator 120. The filter 107 is capable of filtering air flowing in the A1 direction. The fan 108 is capable of driving the airflow within the fresh air chamber 101 and discharging it from the air outlet 106 in the A1 direction. The fan 108 may be a centrifugal fan 108.

[0058] Please refer to Figures 1 to 3 In some cases, the fresh air unit 100 includes a humidification module 160. The humidification module 160 is disposed within the fresh air cavity 101. The humidification module 160 is located between the reheat coil 110 and the air outlet 106. The control module 150 is also configured to control the humidification module 160 to humidify the air when the fresh air unit 100 is in dehumidification and reheat mode.

[0059] In this way, the fresh air can be humidified.

[0060] Specifically, in practical applications, there may be instances where the dehumidification effect on fresh air is too strong, resulting in dry fresh air after dehumidification. In such cases, after reheating the fresh air through the reheat coil 110, the humidification module 160 can be used to add water vapor to the fresh air, thereby increasing the humidity in the fresh air. This makes the humidified fresh air suitable for use by people in the indoor space, or allows the humidity of the indoor space to be adjusted to the desired range.

[0061] Please refer to Figure 1 and Figure 2 The present invention discloses a control method for a fresh air device 100, the fresh air device 100 including a reheat coil 110, an evaporator 120, a first valve pipe 130, and a second valve pipe 140. The fresh air device 100 forms a fresh air cavity 101. The reheat coil 110 and the evaporator 120 are disposed within the fresh air cavity 101. The reheat coil 110 is connected to one end of the first valve pipe 130 and one end of the second valve pipe 140, respectively. The other end of the first valve pipe 130 is connected to a first refrigerant pipe 102. The evaporator 120 is connected to the other end of a second refrigerant pipe 103 and the second valve pipe 140, respectively.

[0062] Please refer to this again. Figure 4 The control methods include: 02: Based on the acquired air conditioning signal, execute the corresponding mode of the fresh air device 100. The fresh air device 100 has a cooling mode and a dehumidification and reheating mode. 03: When the fresh air equipment 100 is in cooling mode, the first valve pipeline 130 is controlled to open the reheat coil 110 and the first refrigerant pipeline 102 at the first opening degree, and the second valve pipeline 140 is controlled to open the reheat coil 110 and the evaporator 120, with the first opening degree being less than 100%; 04: When the fresh air equipment 100 is in dehumidification and reheat mode, control the first valve pipeline 130 to connect the reheat coil 110 and the first refrigerant pipeline 102, and control the second valve pipeline 140 to connect the reheat coil 110 and the evaporator 120 at a second opening degree, the second opening degree being less than 100%.

[0063] The control method of the present invention can be implemented by the fresh air device 100 of the present invention. Specifically, please refer to... Figure 3In some cases, the fresh air unit 100 may include a control module 150. The control module 150 may be used to: execute the corresponding mode of the fresh air unit 100 according to the acquired air conditioning signal, wherein the fresh air unit 100 has a cooling mode and a dehumidification and reheat mode; when the fresh air unit 100 is in cooling mode, control the first valve pipe 130 to conduct the reheat coil 110 and the first refrigerant pipe 102 at a first opening degree, and control the second valve pipe 140 to conduct the reheat coil 110 and the evaporator 120, wherein the first opening degree is less than 100%; when the fresh air unit 100 is in dehumidification and reheat mode, control the first valve pipe 130 to conduct the reheat coil 110 and the first refrigerant pipe 102, and control the second valve pipe 140 to conduct the reheat coil 110 and the evaporator 120 at a second opening degree, wherein the second opening degree is less than 100%.

[0064] The above control method, in dehumidification mode, can first cool the fresh air to dehumidify it, and then heat the fresh air to achieve the effect of dehumidification and reheating. Under the premise that the temperature of the fresh air reaches the expected level, the humidity of the fresh air can be adjusted. In cooling mode, the fresh air equipment 100 can cool the fresh air when it is providing fresh air. In this way, it can achieve the effect of fresh air dehumidification and, to a certain extent, also achieve the effect of fresh air cooling. Users do not need to turn on other cooling equipment to cool the indoor air, which helps to reduce the overall energy consumption and maintenance costs incurred by users when performing air conditioning.

[0065] Specifically, in some cases, the control module 150 can determine the corresponding mode that the fresh air equipment 100 is expected to enter or switch to based on the acquired air conditioning signal, and then execute the corresponding mode of the fresh air equipment 100. Then, it controls the first valve pipeline 130 to be fully opened, opened or closed at a first opening degree, and controls the second valve pipeline 140 to be fully opened, opened or closed at a first opening degree, so as to cooperate with the refrigerant input through the first refrigerant pipe 102 or the second refrigerant pipe 103 to perform heat exchange, thereby realizing the execution of the corresponding mode of the fresh air equipment 100.

[0066] It is understandable that the duct switching of the fresh air device 100 in the corresponding mode can be referred to the aforementioned content. To avoid redundancy, it will not be elaborated here.

[0067] Please refer to Figure 5 In some cases, control methods include: 01: Generates air conditioning signals based on set temperature and set humidity. The set temperature and set humidity can be determined by the user's setting request or by generating air conditioning signals based on the current temperature and humidity of the indoor space.

[0068] The control method of the present invention can be implemented by the fresh air device 100 of the present invention. Specifically, please refer to... Figure 3 In some cases, the control module 150 can be used to generate an air conditioning signal based on a set temperature and a set humidity, which can be determined by a setting request issued by the user, or based on the current temperature and humidity of the indoor space.

[0069] In this way, the fresh air device 100 can adjust the fresh air according to the user's set needs or the air conditions suitable for human comfort.

[0070] Specifically, in some cases, users can set the desired set temperature and set humidity for the fresh air device 100, so that the fresh air device 100 can enter the cooling mode or heating mode according to the set temperature to adjust the temperature of the fresh air, and can enter the dehumidification and reheating mode or turn on the humidification module 160 to perform humidification treatment according to the set humidity to adjust the humidity of the fresh air.

[0071] In other cases, the fresh air system 100 can record a temperature range and humidity range suitable for human comfort. If the current temperature of the indoor space exceeds the temperature range, the fresh air system 100 can enter a cooling mode or a heating mode to adjust the temperature of the fresh air, thereby adjusting the indoor temperature to the temperature range. If the current humidity of the indoor space exceeds the humidity range, the fresh air system 100 can enter a dehumidification and reheating mode or turn on the humidification module 160 to perform humidification treatment to adjust the temperature of the fresh air, thereby adjusting the indoor humidity to the humidity range.

[0072] Please refer to Figure 6 A fresh air device 100 according to the present invention may include a memory 301 and a processor 302. The memory 301 stores a computer program. When the processor 302 executes the computer program, it can implement the steps of the above-described control method.

[0073] For example, when a computer program is executed by processor 302, the control methods that can be implemented include: 02: Based on the acquired air conditioning signal, execute the corresponding mode of the fresh air device 100. The fresh air device 100 has a cooling mode and a dehumidification and reheating mode. 03: When the fresh air equipment 100 is in cooling mode, the first valve pipeline 130 is controlled to open the reheat coil 110 and the first refrigerant pipeline 102 at the first opening degree, and the second valve pipeline 140 is controlled to open the reheat coil 110 and the evaporator 120, with the first opening degree being less than 100%; 04: When the fresh air equipment 100 is in dehumidification and reheat mode, control the first valve pipeline 130 to connect the reheat coil 110 and the first refrigerant pipeline 102, and control the second valve pipeline 140 to connect the reheat coil 110 and the evaporator 120 at a second opening degree, the second opening degree being less than 100%.

[0074] The aforementioned fresh air device 100, in dehumidification mode, can first cool the fresh air to dehumidify it, and then heat the fresh air to achieve the effect of dehumidification and reheating. Under the premise that the temperature of the fresh air reaches the expected level, it can adjust the humidity of the fresh air. In cooling mode, the fresh air device 100 can cool the fresh air while it is introducing fresh air. In this way, it can achieve the effect of fresh air dehumidification and, to a certain extent, also achieve the effect of fresh air cooling. Users do not need to turn on other cooling equipment to cool the indoor air, which helps to reduce the overall energy consumption and maintenance costs incurred by users when adjusting the air.

[0075] The computer-readable storage medium can be located in the control module 150 or in other terminals. The control module 150 can communicate with other terminals to obtain the corresponding program.

[0076] It is understood that computer-readable storage media can include: any entity or device capable of carrying a computer program, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory 301, read-only memory 301 (ROM), random access memory 301 (RAM), and software distribution media, etc. A computer program can include computer program code. Computer program code can be in the form of source code, object code, executable files, or certain intermediate forms, etc.

[0077] In some embodiments of the present invention, the control module 150 may be a microcontroller chip that integrates a processor 302, a memory 301, a communication module, etc. The processor 302 may be a central processing unit (CPU), a graphics processing unit (GPU), or other general-purpose processors 302, digital signal processors 302 (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0078] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0079] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a system including a processing module or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0080] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to the embodiments of the present invention without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fresh air device, characterized in that, The fresh air system includes a reheat coil, an evaporator, a first valve pipe, a second valve pipe, and a control module. The fresh air system forms a fresh air cavity. The reheat coil and the evaporator are disposed within the fresh air cavity. The reheat coil is connected to one end of the first valve pipe and one end of the second valve pipe, respectively. The other end of the first valve pipe is connected to a first refrigerant pipe. The evaporator is connected to the other end of both the second refrigerant pipe and the second valve pipe. The fresh air system has a cooling mode and a dehumidification / reheat mode. The control module is configured to, when the fresh air system is in the cooling mode, control the first valve pipeline to open the reheat coil and the first refrigerant pipe to a first opening degree, and control the second valve pipeline to open the reheat coil and the evaporator, wherein the first opening degree is less than 100%. In addition, when the fresh air equipment is in the dehumidification and reheat mode, the first valve pipeline is controlled to connect the reheat coil and the first refrigerant pipeline, and the second valve pipeline is controlled to connect the reheat coil and the evaporator at a second opening degree, wherein the second opening degree is less than 100%.

2. The fresh air equipment according to claim 1, characterized in that, The first valve pipeline includes a first branch and a second branch, which are respectively connected to the first refrigerant pipe and the reheat coil. The first branch is equipped with a first expansion valve, and the second branch is equipped with a first solenoid valve. The control module is configured to, when the fresh air device is in the cooling mode, control the first expansion valve to open to the first opening degree to conduct the first branch, and control the first solenoid valve to close to shut off the second branch. In addition, when the fresh air equipment is in the dehumidification and reheat mode, the first expansion valve is controlled to shut off to close the first branch, and the first solenoid valve is controlled to open to open the second branch.

3. The fresh air equipment according to claim 1 or 2, characterized in that, The second valve pipeline is equipped with a second expansion valve. The control module is configured to, when the fresh air equipment is in the cooling mode, control the second expansion valve to fully open to connect the second valve pipeline. Furthermore, when the fresh air equipment is in the dehumidification and reheat mode, the second expansion valve is controlled to open at the second opening degree to connect the second valve pipeline.

4. The fresh air equipment according to claim 1 or 2, characterized in that, The second valve pipeline includes a third branch and a fourth branch, which are respectively connected to the reheat coil and the evaporator. The third branch is equipped with a third expansion valve, and the fourth branch is equipped with a second solenoid valve. The control module is configured to, when the fresh air device is in the cooling mode, control the third expansion valve to close the third branch, and control the second solenoid valve to open the fourth branch. In addition, when the fresh air equipment is in the dehumidification and reheat mode, the third expansion valve is controlled to open at the second opening degree to conduct the third branch, and the second solenoid valve is controlled to close to shut off the fourth branch.

5. The fresh air equipment according to claim 1, characterized in that, The fresh air equipment also has a heating mode. The control module is configured to, when the fresh air equipment is in the heating mode, control the first valve pipeline to connect the reheat coil and the first refrigerant pipeline, and control the second valve pipeline to connect the reheat coil and the evaporator.

6. The fresh air equipment according to claim 1, characterized in that, The fresh air system is equipped with an air inlet, an air return outlet, and an air outlet. The air inlet and the air return outlet are connected to the fresh air cavity on one side, and the air outlet is connected to the fresh air cavity on the other side. When the fresh air device is in the dehumidification and reheat mode, the fresh air device can dehumidify and reheat the outdoor air flowing into the fresh air cavity from at least one of the air inlet and the air outlet, and discharge the treated air from the air outlet.

7. The fresh air equipment according to claim 6, characterized in that, The fresh air system includes a humidification module disposed within the fresh air cavity, located between the reheat coil and the air outlet. The control module is also configured to control the humidification module to humidify the air when the fresh air device is in the dehumidification and reheat mode.

8. A control method for a fresh air device, characterized in that, The fresh air system includes a reheat coil, an evaporator, a first valve pipe, and a second valve pipe. The fresh air system forms a fresh air cavity. The reheat coil and the evaporator are disposed within the fresh air cavity. The reheat coil is connected to one end of the first valve pipe and one end of the second valve pipe, respectively. The other end of the first valve pipe is connected to a first refrigerant pipe. The evaporator is connected to the other end of both a second refrigerant pipe and the second valve pipe. The control method includes: Based on the acquired air conditioning signal, the corresponding mode of the fresh air device is executed, and the fresh air device has a cooling mode and a dehumidification and reheating mode; When the fresh air equipment is in the cooling mode, the first valve pipeline is controlled to open to the reheat coil and the first refrigerant pipeline at a first opening degree, and the second valve pipeline is controlled to open to the reheat coil and the evaporator, wherein the first opening degree is less than 100%. When the fresh air equipment is in the dehumidification and reheat mode, the first valve pipeline is controlled to connect the reheat coil and the first refrigerant pipeline, and the second valve pipeline is controlled to connect the reheat coil and the evaporator at a second opening degree, wherein the second opening degree is less than 100%.

9. The control method according to claim 8, characterized in that, The control method includes: The air conditioning signal is generated based on the set temperature and set humidity, wherein the set temperature and set humidity can be determined by a setting request issued by the user, or The air conditioning signal is generated based on the current temperature and humidity of the indoor space.

10. A fresh air device, characterized in that, The fresh air device includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the steps of the control method according to claim 8 or 9.

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