Air conditioner and temperature and humidity control method

Abstract

The invention discloses an air conditioner and a temperature and humidity control method, and belongs to the technical field of air conditioners. The air conditioner comprises an outdoor unit and an indoor unit, an indoor heat exchanger of the indoor unit comprises a plurality of heat exchange parts, the first end of each heat exchange part is connected with a fourth port of the valve set, and the second end of each heat exchange part is connected with the outdoor heat exchanger through a corresponding electronic expansion valve. The indoor unit is further provided with a flow guide device used for adjusting the air volume proportion of the heat exchange parts receiving air supplied by the fan assembly. Each heat exchange part is controlled by an independent electronic expansion valve, the air volume of each heat exchange part can be adjusted through a flow guide device, temperature and humidity separate control is achieved, energy waste caused by heating after cooling and dehumidification in conventional temperature and humidity separate control is avoided, and the energy efficiency of the whole machine is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of air conditioning, and in particular, relates to an air conditioner and a temperature and humidity control method. Background Art

[0002] Agricultural air conditioning is still in its early stages of development. As planting spaces are usually large, large units are often used for air conditioning. To achieve temperature and humidity control, agricultural air conditioning is usually complex in structure, resulting in high initial and maintenance costs, difficulty in installation and control, and low energy efficiency. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an air conditioner and a temperature and humidity control method, wherein an indoor heat exchanger is divided into multiple parts, each heat exchange part is controlled by a separate electronic expansion valve, and the air volume of each heat exchange part can also be adjusted through a flow guide device to achieve separate temperature and humidity control.

[0004] In a first aspect, the present application provides an air conditioner, comprising an outdoor unit and an indoor unit;

[0005] The outdoor unit includes:

[0006] compressor and outdoor heat exchanger;

[0007] A valve group, wherein a first port of the valve group is connected to an output port of the compressor, a second port of the valve group is connected to an input port of the compressor, a third port of the valve group is connected to a first end of an outdoor heat exchanger, and a fourth port of the valve group is connected to an indoor unit, and the valve group is configured to control the connectivity between its ports;

[0008] The indoor unit includes:

[0009] A housing having an air inlet and an air outlet;

[0010] A fan assembly is disposed in the housing and is used to form an air path between the air inlet and the air outlet;

[0011] An indoor heat exchanger is arranged in the shell and located between the fan assembly and the air outlet. The indoor heat exchanger includes a plurality of heat exchange parts. A first end of each heat exchange part is connected to the fourth port of the valve group, and a second end of each heat exchange part is connected to the outdoor heat exchanger through a corresponding electronic expansion valve.

[0012] The flow guide device is arranged in the shell and is used to adjust the air volume ratio of each heat exchange part to the air supplied by the fan assembly.

[0013] According to one embodiment of the present application, the indoor heat exchanger includes a first heat exchange part and a second heat exchange part, and the first heat exchange part and the second heat exchange part are arranged at an angle with the cross section of the wind path, and the angle ranges from 35° to 45°.

[0014] According to one embodiment of the present application, the fan assembly includes a volute fan, the air outlet of the turbofan is arranged toward the indoor heat exchanger, and the wind receiving areas of the first heat exchange part and the second heat exchange part are different.

[0015] According to one embodiment of the present application, the flow guiding device includes:

[0016] A guide plate, one side of which is rotatably disposed between the first heat exchange portion and the second heat exchange portion.

[0017] According to one embodiment of the present application, the indoor unit further includes:

[0018] A humidifying device is disposed in the housing and located between the indoor heat exchanger and the air outlet;

[0019] The water receiving structure is arranged in the shell and is located below the indoor heat exchanger.

[0020] According to one embodiment of the present application, the indoor unit further includes:

[0021] A plurality of temperature sensors and humidity sensors are arranged corresponding to each heat exchange part.

[0022] In a second aspect, the present application provides a temperature and humidity control method, which is applied to the air conditioner according to the above, and the temperature and humidity control method includes:

[0023] obtaining a target temperature and a target humidity, and determining a target dew point temperature according to the target temperature and the target humidity;

[0024] Determine the total outlet air temperature and the total outlet air dew point temperature according to the air volume ratio of each heat exchange part of the indoor heat exchanger, the detection temperature and the detection humidity;

[0025] Determine the temperature and humidity adjustment direction based on the comparison results between the target temperature and the total air outlet temperature, and between the target dew point temperature and the total air outlet dew point temperature;

[0026] The electronic expansion valve and / or flow guide device corresponding to each heat exchange part is controlled according to the temperature and humidity adjustment direction.

[0027] According to one embodiment of the present application, the indoor heat exchanger includes a first heat exchange part and a second heat exchange part, and the total outlet air temperature and the total outlet air dew point temperature are determined according to the air volume ratio, the detected temperature and the detected humidity of each heat exchange part of the indoor heat exchanger, including:

[0028] Determine the total outlet air temperature and total outlet air humidity according to the following formula:

[0029] G=G A +G B

[0030] G×T act =GA ×T act-A +G B ×T act-B

[0031] G×d act =G A ×d act-A +G B ×d act-B

[0032] Among them, G is the total air volume, G A is the air volume corresponding to the first heat exchange part, G B is the air volume corresponding to the second heat exchange part, T act is the total outlet air temperature, T act-A is the outlet air temperature corresponding to the first heat exchange part, T act-B is the outlet air temperature corresponding to the second heat exchange part, d act is the total outlet humidity, d act-A is the outlet humidity corresponding to the first heat exchange part, d act-B is the outlet air humidity corresponding to the second heat exchange part;

[0033] The total outlet air dew point temperature is determined based on the total outlet air temperature and total outlet air humidity.

[0034] According to one embodiment of the present application, the temperature and humidity adjustment direction is determined according to the comparison results between the target temperature and the total air outlet temperature, and between the target dew point temperature and the total air outlet dew point temperature, including:

[0035] When the target temperature is greater than the total air outlet temperature, and the target dew point temperature is greater than the total air outlet dew point temperature, the temperature and humidity adjustment direction is cooling and dehumidification;

[0036] When the target temperature is greater than the total air outlet temperature and the target dew point temperature is less than the total air outlet dew point temperature, the temperature and humidity adjustment direction is cooling and humidification;

[0037] When the target temperature is lower than the total air outlet temperature and the target dew point temperature is higher than the total air outlet dew point temperature, the temperature and humidity adjustment direction is heating and dehumidification;

[0038] When the target temperature is lower than the total air outlet temperature and the target dew point temperature is lower than the total air outlet dew point temperature, the temperature and humidity adjustment direction is heating and humidification.

[0039] According to one embodiment of the present application, obtaining a target temperature and a target humidity includes:

[0040] Receive control instructions sent by the terminal and / or cloud server, and parse the control instructions to obtain target temperature and target humidity;

[0041] After determining the total outlet air temperature and the total outlet air dew point temperature according to the air volume ratio of each heat exchange part of the indoor heat exchanger, the detected temperature and the detected humidity, it also includes:

[0042] The total outlet air temperature, total outlet air humidity and total outlet air dew point temperature are transmitted to the terminal and / or cloud server.

[0043] According to the air conditioner and temperature and humidity control method of the present application, a split air conditioner is adopted, in which the heat exchanger of the indoor unit is divided into multiple parts, each heat exchange part is controlled by a separate electronic expansion valve, and the air volume of each heat exchange part can also be adjusted by a flow guide device, which is conducive to realizing temperature and humidity separate control, avoiding the energy waste caused by conventional temperature and humidity separate control of first cooling and dehumidifying and then heating, and improving the energy efficiency of the whole machine.

[0044] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0046] Figure 1 is a system flow chart of the cooling mode of the air conditioner provided in the embodiment of the present application;

[0047] Figure 2 is a system flow chart of a heating mode of an air conditioner provided in an embodiment of the present application;

[0048] Figure 3 is a structural schematic diagram of an indoor unit of an air conditioner provided in an embodiment of the present application;

[0049] Figure 4 This is one of the flow charts of the temperature and humidity control method provided in the embodiment of the present application;

[0050] Figure 5 This is the second flow chart of the temperature and humidity control method provided in the embodiment of the present application.

[0051] Reference numerals:

[0052] Compressor 1, four-way valve 2, gas-liquid separator 3, outdoor heat exchanger 4, fine stop valve 5, first electronic expansion valve 6, second electronic expansion valve 7, third electronic expansion valve 8, first heat exchange unit 9, first outlet air temperature sensor 10, first outlet air humidity sensor 11, second heat exchange unit 12, second outlet air temperature sensor 13, second outlet air humidity sensor 14, coarse stop valve 15, volute fan 16, guide vane 17, humidifier 18, water receiving structure 19. DETAILED DESCRIPTION

[0053] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0054] The following description relates to elements or components that are "connected" or "coupled" together. As used herein, "connection" may refer to an element / component being mechanically coupled to (or directly connected to) another element / component, and is not necessarily direct. Similarly, "coupling" may refer to an element / component being directly or indirectly coupled to (or directly or indirectly connected to) another element / component, and is not necessarily mechanical. However, it should be understood that although in one embodiment, two elements are described below as "connected", similar elements may be "coupled" in alternative embodiments, and vice versa. Therefore, although the schematic diagram shown here describes an exemplary arrangement of elements, additional intermediate elements, devices, parts or components may still exist in a practical embodiment.

[0055] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0056] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0057] Reference Figure 1-Figure 3 , Figure 1 shows a system flow of the cooling mode of an air conditioner, Figure 2 shows a system flow of a heating mode of an air conditioner, Figure 3 The structure of an indoor unit of an air conditioner is shown. An embodiment of the present application provides an air conditioner.

[0058] In this embodiment, the air conditioner includes an outdoor unit and an indoor unit, the outdoor unit includes a compressor 1, an outdoor heat exchanger 4 and a valve group, the first port of the valve group is connected to the output port of the compressor 1, the second port of the valve group is connected to the input port of the compressor 1, the third port of the valve group 1 is connected to the first end of the outdoor heat exchanger 4, the fourth port of the valve group is connected to the indoor unit, and the valve group is configured to control the connection relationship between its own ports. The indoor unit includes a shell, a fan assembly, an indoor heat exchanger and a flow guide device, the shell has an air inlet 21 and an air outlet 22; the fan assembly is arranged in the shell, and is used to form an air path between the air inlet 21 and the air outlet 22; the indoor heat exchanger is arranged in the shell and is located between the fan assembly and the air outlet 22, the indoor heat exchanger includes a plurality of heat exchange parts, the first end of each heat exchange part is connected to the fourth port of the valve group, and the second end of each heat exchange part is connected to the outdoor heat exchanger through a corresponding electronic expansion valve; the flow guide device is arranged in the shell, and is used to adjust the air volume ratio of each heat exchange part receiving air from the fan assembly.

[0059] As an example, the air conditioner may be an agricultural air conditioner, such as a tea air conditioner, a mushroom air conditioner or a flower air conditioner, etc. The indoor unit of an agricultural air conditioner is usually larger, and unlike the cross-flow fan used in the indoor unit of a household air conditioner, it usually uses an axial flow fan or a turbo fan.

[0060] The compressor 1, the outdoor heat exchanger 4, the valve group and the indoor heat exchanger are connected by pipelines to form a circulation loop, and other devices can be set on the circulation loop. The circulation loop is used to circulate the heat exchange medium. According to the flow direction of the heat exchange medium, the operation mode of the air conditioner is divided into a cooling mode and a heating mode. Among them, the valve group can include one or more valve bodies for controlling the flow direction of the heat exchange medium.

[0061] Each heat exchange part of the indoor heat exchanger forms an independent pipeline, which controls the heat exchange medium in the pipeline through the corresponding electronic expansion valve. For example, the indoor heat exchanger may include two heat exchange parts, and under the control of the corresponding two electronic expansion valves, the temperature and / or pressure of the heat exchange medium inside the two heat exchange parts are different. Of course, the number of heat exchange parts can be other values, which can be set according to needs, and this embodiment is not limited to this.

[0062] like Figure 1 and Figure 2 As shown, as an example, the overall system architecture of the air conditioner may include a compressor 1, a four-way valve 2, a gas-liquid separator 3, an outdoor heat exchanger 4, a fine stop valve 5, a first electronic expansion valve 6, a second electronic expansion valve 7, a third electronic expansion valve 8, a first heat exchange unit 9, a first outlet air temperature sensor 10, a first outlet air humidity sensor 11, a second heat exchange unit 12, a second outlet air temperature sensor 13, a second outlet air humidity sensor 14, and a coarse stop valve 15.

[0063] Taking the air conditioner operating in cooling mode as an example, the low-temperature, low-pressure gaseous refrigerant is compressed into a high-temperature, high-pressure state by the compressor 1, enters the outdoor heat exchanger 4 through the four-way valve 2, and is condensed into a high-pressure, medium-temperature liquid refrigerant, and then enters the room through the fine stop valve 5. The refrigerant is divided into two paths. One path is throttled and reduced in pressure by the first electronic expansion valve 6, and then flows through the first heat exchange part 9 and the second electronic expansion valve 7 for secondary throttling (ensuring that the pressure at the two outlets is the same); the third electronic expansion valve 8, the second heat exchange part 12, after the two refrigerant paths are combined, they return to the compressor 2 through the coarse stop valve 15, the four-way valve 2, and the gas-liquid separator 3, and the cycle is repeated.

[0064] The refrigerant flow direction in the heating mode is opposite, wherein the second electronic expansion valve 7 is fully open, and the first electronic expansion valve 6 and the third electronic expansion valve 8 are connected in parallel to control throttling.

[0065] In this example, when the air conditioner is running, the temperature sensors and humidity sensors corresponding to the first heat exchange part 9 and the second heat exchange part 12 detect the temperature and humidity of the corresponding air volume. The first air outlet temperature sensor 10 is used to detect the temperature T of the air volume flowing through the first heat exchange part 9. act-A The first outlet air humidity sensor 11 is used to detect the humidity of the air volume flowing through the first heat exchange part 9. act-A The second air outlet temperature sensor 13 is used to detect the temperature T of the air volume flowing through the second heat exchange unit 12. act-B The second air outlet humidity sensor 14 is used to detect the air volume d flowing through the second heat exchange part 12. act-B , where T act-A and d act-A It can be adjusted by the first electronic expansion valve 6, T act-B and d act-B It can be adjusted by the third electronic expansion valve 8.

[0066] According to the air conditioner of the present application, a split air conditioner is adopted, in which the heat exchanger of the indoor unit is divided into multiple parts, each heat exchange part is controlled by a separate electronic expansion valve, and the air volume of each heat exchange part can also be adjusted by a flow guide device, which is conducive to realizing separate control of temperature and humidity, avoiding the energy waste caused by conventional separate control of temperature and humidity by first cooling and dehumidifying and then heating, and improving the energy efficiency of the whole machine.

[0067] As an example, Figure 3 As shown, the fan assembly adopts a volute fan 16, and the indoor heat exchanger is composed of two heat exchange parts, including a first heat exchange part 9 and a second heat exchange part 12. The first heat exchange part 9 and the second heat exchange part 12 are arranged at an angle with the cross section of the wind path. The value range of the angle α is 35° to 45°, which is conducive to the discharge of condensed water. Of course, the angle α can also take other values, and its value range is greater than or equal to 0°.

[0068] The first heat exchange part 9 and the second heat exchange part 12 are arranged in a V shape, and the side with a smaller angle is facing the volute fan 16. The first heat exchange part 9 and the second heat exchange part 12 are arranged obliquely, which is conducive to forming a larger wind receiving area in a smaller space. The wind receiving area refers to the part of the heat exchange part surface that can contact the air volume when the air volume is blown out from the volute fan 16.

[0069] In some embodiments, the first heat exchange portion 9 and the second heat exchange portion 12 have different wind receiving areas. Figure 3 As shown, the wind receiving area of ​​the first heat exchange part 9 is smaller than the wind receiving area of ​​the second heat exchange part 12, that is, the air volume adjusted by the first heat exchange part 9 is smaller than the air volume adjusted by the second heat exchange part 12. Of course, the wind receiving area of ​​the first heat exchange part 9 can also be larger than the wind receiving area of ​​the second heat exchange part 12.

[0070] It is understandable that the two different air volumes have different effects on the total air volume. For example, increasing the temperature of a large air volume can increase the temperature of the total air volume faster than increasing the temperature of a small air volume. Therefore, the first heat exchange part 9 and the second heat exchange part 12 have different wind receiving areas, which is conducive to improving the flexibility of temperature and humidity regulation.

[0071] In some embodiments, the guide device includes a guide plate 17 , and one side of the guide plate 17 is rotatably disposed between the first heat exchange portion 9 and the second heat exchange portion 12 .

[0072] It is understandable that the guide vane 17 is arranged close to the air outlet 22 of the volute fan 16 on the side away from the rotating side, for example, it can extend into the air outlet 22. The guide vane 17 can adjust the air volume passing through the first heat exchange part 9 and the second heat exchange part 12 by rotating the adjustment angle θ.

[0073] In some embodiments, the indoor unit further includes a humidifier 18 and a water receiving structure 19. The humidifier 18 is disposed in the shell and is located between the indoor heat exchanger and the air outlet 22; the water receiving structure 19 is disposed in the shell and is located below the indoor heat exchanger.

[0074] The humidifier 18 is used to increase the humidity of the total air outlet, and it may include an atomization structure, which uses an external water source or condensed water to atomize and humidify the air outlet. The water receiving structure 19 may include a water receiving tray, which may be a groove structure formed by a depression of the shell, or an independent tray connected to the shell. The water receiving structure 19 is used to receive condensed water, or the deposited water of the atomized water vapor. The condensed water and the deposited water in the water receiving structure 19 can be provided to the humidifier 18 for atomization.

[0075] Reference Figure 4 , Figure 4A temperature and humidity control process is shown. An embodiment of the present application also proposes a temperature and humidity control method, which is applied to the aforementioned air conditioner. The specific structure and principle of the air conditioner can be referred to above, and this embodiment will not be repeated here.

[0076] In this embodiment, the temperature and humidity control method includes step 10, step 20, step 30 and step 40.

[0077] Step 10: Obtain target temperature and target humidity, and determine target dew point temperature according to the target temperature and target humidity;

[0078] Step 20, determining the total outlet air temperature and the total outlet air dew point temperature according to the air volume ratio of each heat exchange part of the indoor heat exchanger, the detected temperature and the detected humidity;

[0079] Step 30: Determine the temperature and humidity adjustment direction according to the comparison results between the target temperature and the total air outlet temperature, and between the target dew point temperature and the total air outlet dew point temperature;

[0080] Step 40: Control the electronic expansion valve and / or flow guide device corresponding to each heat exchange part according to the temperature and humidity adjustment direction.

[0081] It should be noted that the executor of the temperature and humidity control method in this embodiment can be the controller in the aforementioned air conditioner (not shown in the figure), and the controller can be connected to controllable devices such as electronic expansion valves and compressors to adjust the operation of each device and realize the control of the air conditioner.

[0082] The target temperature and target humidity refer to the temperature and humidity to be reached in the space conditioned by the air conditioner, which can be input by the user through an input device, which can be a remote controller, etc. The controller can include a communication module that can communicate with the input device to receive the target temperature and target humidity.

[0083] In some embodiments, the controller may also be connected to the terminal and / or the cloud server via a communication module. Obtaining the target temperature and the target humidity may also include: receiving a control instruction sent by the terminal and / or the cloud server, and parsing the control instruction to obtain the target temperature and the target humidity.

[0084] The terminal can be a mobile phone, etc., and the user can communicate with the controller directly through the terminal, or connect through a cloud server to input the target temperature and target humidity into the controller. The controller can automatically adjust the outlet temperature and humidity of the air conditioner according to the target parameters input externally by the user, and can meet the specific requirements of temperature and humidity for different categories throughout their life cycle.

[0085] It should be noted that the dew point temperature can be determined based on the enthalpy diagram, which shows the relationship between various parameters in humid air. The target temperature and target humidity are calculated based on the enthalpy diagram to determine the corresponding target dew point temperature. When calculating relative moisture content and relative humidity, parameters such as temperature and pressure also need to be considered. In this embodiment, the dew point temperature is used as the judgment standard for humidity regulation, and the humidity control in the planting space is more accurate.

[0086] As an example, taking the structure of the indoor unit as an example, the air volume ratio can be determined according to the angle of the guide plate 17, and the detected temperature and the detected humidity are the detection values ​​of the first outlet air temperature sensor 10, the first outlet air humidity sensor 11, the second outlet air temperature sensor 13, and the second outlet air humidity sensor 14. The determination process of the total outlet air temperature and the total outlet air dew point temperature includes:

[0087] Determine the total outlet air temperature and total outlet air humidity using the following formula:

[0088] G=G A +G B

[0089] G×T act =G A ×T act-A +G B ×T act-B

[0090] G×d act =G A ×d act-A +G B ×d act-B

[0091] Among them, G is the total air volume, G A is the air volume corresponding to the first heat exchange unit 9, G B is the air volume corresponding to the second heat exchange unit 12, T act is the total outlet air temperature, T act-A is the outlet air temperature corresponding to the first heat exchange unit 9, T act-B is the outlet air temperature corresponding to the second heat exchange unit 12, d act is the total outlet humidity, d act-A is the outlet humidity of the first heat exchange unit 9, d act-B is the outlet air humidity corresponding to the second heat exchange unit 12;

[0092] The total outlet air dew point temperature is determined based on the total outlet air temperature and total outlet air humidity.

[0093] The first heat exchanger 9 and the second heat exchanger 12 are both provided with temperature sensors and humidity sensors. The total outlet air temperature and total outlet air humidity can be calculated based on the feedback data of each sensor. Then, the corresponding total outlet air dew point temperature is calculated based on the enthalpy-humidity diagram. The total outlet air dew point temperature can be expressed as T L，act .

[0094] In some embodiments, after determining the total outlet air temperature and the total outlet air dew point temperature, the method further includes: transmitting the total outlet air temperature, the total outlet air humidity and the total outlet air dew point temperature to the terminal and / or the cloud server. By uploading the outlet air temperature, the total outlet air humidity and the total outlet air dew point temperature, real-time monitoring of the planting space can be achieved, which is convenient for subsequent control.

[0095] In this embodiment, the temperature and humidity adjustment directions include cooling and dehumidification, cooling and humidification, heating and dehumidification, and heating and humidification. The target temperature is represented by T obj , the target dew point temperature is expressed as T L，obj , according to T obj and T act The size relationship between them, and T L，obj and T L，act The size relationship between them determines the direction of temperature and humidity adjustment.

[0096] When the target temperature is greater than the total outlet air temperature, and the target dew point temperature is greater than the total outlet air dew point temperature (i.e., T obj >T act , and T L，obj >T L，act ), the direction of temperature and humidity adjustment is cooling and dehumidification.

[0097] In this case, it is necessary to reduce the total outlet air temperature and humidity. For example, the first heat exchange part 9 and the second heat exchange part 12 both bear the cooling and dehumidification functions. The angle of the guide vane 17 is initially set to θ as 0°, and the evaporation temperature of the first heat exchange part 9 and the second heat exchange part 12 is reduced by increasing the operating frequency of the compressor 1 and reducing the opening of the first electronic expansion valve 6 and the third electronic expansion valve 8. It should be noted that when the evaporation temperature of the first heat exchange part 9 and the second heat exchange part 12 is reduced to below the dew point temperature, it also plays a dehumidification role while cooling. Therefore, in order to achieve the target temperature and target dew point temperature, the angle of the guide vane 17 can be adjusted to adjust the air volume between the first heat exchange part 9 and the second heat exchange part 12 to adjust the temperature and humidity of the total outlet air.

[0098] When the target temperature is greater than the total outlet air temperature and the target dew point temperature is less than the total outlet air dew point temperature (i.e. T obj >T act , and T L，obj <T L，actt ), the direction of temperature and humidity adjustment is cooling and humidification.

[0099] In this case, it is necessary to lower the total outlet air temperature and increase the total outlet air humidity. For example, the first heat exchange unit 9 is responsible for cooling and dehumidification (the evaporation temperature is reduced to below the dew point temperature), and the second heat exchange unit 12 is only responsible for cooling (the evaporation temperature is controlled above the dew point temperature). The angle of the guide vane 17 is initially set to θ as 0°, and the operating frequency of the compressor 1 is increased and the opening of the first electronic expansion valve 6 and the third electronic expansion valve 8 is adjusted. Similarly, the target temperature and target dew point temperature are achieved by adjusting the angle of the guide vane 17. Among them, if T is reached obj =T act In the case of obj <d act If the humidity is too high, the humidifying device 18 can be turned on for humidification.

[0100] When the target temperature is lower than the total outlet air temperature and the target dew point temperature is higher than the total outlet air dew point temperature (i.e. T obj <T act , and T L，obj >T L，act ), the direction of temperature and humidity adjustment is heating and dehumidification.

[0101] In this case, it is necessary to increase the total outlet air temperature and reduce the total outlet air humidity. For example, the first heat exchange unit 9 is responsible for cooling and dehumidification (the evaporation temperature is reduced to below the dew point temperature), and the second heat exchange unit 12 is only responsible for cooling (the evaporation temperature is controlled above the dew point temperature). The angle of the guide vane 17 is initially set to 0°. By increasing the operating frequency of the compressor 1 and adjusting the opening of the first electronic expansion valve 6 and the third electronic expansion valve 8. When d is reached obj =d act In this case, the opening of the first electronic expansion valve 6 is adjusted to ensure that the total air outlet temperature meets the requirement.

[0102] When the target temperature is lower than the total outlet air temperature and the target dew point temperature is lower than the total outlet air dew point temperature (i.e. T obj <T act , and T L，obj <T L，act ), the temperature and humidity adjustment direction is heating and humidification

[0103] In this case, it is necessary to increase the total outlet air temperature and humidity. The guide vane 17 angle is initially set to 0°, and the evaporation temperature of the first heat exchange part 9 and the second heat exchange part 12 is increased by increasing the operating frequency of the compressor 1 and increasing the opening of the first electronic expansion valve 6 and the third electronic expansion valve 8. Similarly, the humidifier 18 can also be turned on to make the total outlet air humidity meet the requirements.

[0104] According to the temperature and humidity control method of the present application, by controlling the independent electronic expansion valves corresponding to each heat exchanger of the indoor unit and adjusting the angle of the flow guide device, the temperature of the heat exchange medium of each heat exchanger is adjusted, and the humidifying device can also be turned on to achieve temperature and humidity separate control, avoiding the energy waste caused by conventional temperature and humidity separate control of first cooling and dehumidifying and then heating, and improving the energy efficiency of the whole machine.

[0105] Reference Figure 5 , Figure 5 As an example, a process of executing the temperature and humidity control method by the air conditioner may be: receiving a control sequence input from the outside, including a target air volume G, a target temperature T obj and target moisture content d obj ; Then according to T obj and d obj Calculate the target dew point temperature T L，obj ; During operation, if it is the first time to start the machine, first set the guide vane angle θ to 0°; then use the temperature sensor to measure the indoor temperature T N and outdoor temperature T W ; Based on T N 、T W、 T obj and d obj Calculate the initial target frequency and initial target valve opening, where the target valve opening includes the opening of each electronic expansion valve in the air conditioner; calculate the total outlet air temperature T when the air conditioner is running stably for a period of time (such as 3 minutes) or when it is not the first time to start the machine. act and total air humidity d act , and calculate the total outlet dew point temperature T L，act ; Then according to T obj 、T act 、T L，obj and T L，act Determine the operating mode; after determining the corresponding operating mode, control the compressor 1, each electronic expansion valve and / or guide vane 17, etc. to achieve the corresponding temperature and humidity requirements; then re-determine at a certain interval (such as 30s).

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0107] In this article, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0108] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An air conditioner, characterized in that: Includes outdoor unit and indoor unit; The outdoor unit comprises: compressor and outdoor heat exchanger; a valve group, wherein a first port of the valve group is connected to an output port of the compressor, a second port of the valve group is connected to an input port of the compressor, a third port of the valve group is connected to a first end of the outdoor heat exchanger, a fourth port of the valve group is connected to the indoor unit, and the valve group is configured to control the communication relationship between its ports; The indoor unit comprises: A housing having an air inlet and an air outlet; A fan assembly, disposed in the housing, and used to form an air path between the air inlet and the air outlet; an indoor heat exchanger, arranged in the housing and located between the fan assembly and the air outlet, the indoor heat exchanger comprising a plurality of heat exchange parts, a first end of each of the heat exchange parts being connected to the fourth port of the valve group, and a second end of each of the heat exchange parts being connected to the outdoor heat exchanger through a corresponding electronic expansion valve; The air guide device is arranged in the shell and is used to adjust the air volume ratio of each heat exchange part receiving the air supplied by the fan assembly.

2. The air conditioner according to claim 1, characterized in that: The indoor heat exchanger includes a first heat exchange part and a second heat exchange part, and the first heat exchange part and the second heat exchange part are arranged at an angle with the cross section of the wind path, and the value range of the angle is 35° to 45°.

3. The air conditioner according to claim 2, characterized in that: The fan assembly includes a volute fan, an air outlet of the turbo fan is arranged toward the indoor heat exchanger, and the first heat exchange portion and the second heat exchange portion have different wind receiving areas.

4. The air conditioner according to claim 2, characterized in that: The flow guiding device comprises: A guide plate, one side of which is rotatably disposed between the first heat exchange portion and the second heat exchange portion.

5. The air conditioner according to any one of claims 1 to 4, characterized in that: The indoor unit further comprises: A humidifying device, disposed in the housing and located between the indoor heat exchanger and the air outlet; The water receiving structure is arranged in the shell and is located below the indoor heat exchanger.

6. The air conditioner according to any one of claims 1 to 4, characterized in that: The indoor unit further comprises: A plurality of temperature sensors and humidity sensors are arranged corresponding to each of the heat exchange parts.

7. A temperature and humidity control method, characterized in that: Applied to the air conditioner according to any one of claims 1 to 6, the temperature and humidity control method comprises: Acquiring a target temperature and a target humidity, and determining a target dew point temperature according to the target temperature and the target humidity; Determine the total outlet air temperature and the total outlet air dew point temperature according to the air volume ratio of each heat exchange part of the indoor heat exchanger, the detection temperature and the detection humidity; Determining the temperature and humidity adjustment direction according to the comparison results between the target temperature and the total air outlet temperature, and between the target dew point temperature and the total air outlet dew point temperature; The electronic expansion valve and / or the flow guide device corresponding to each of the heat exchange parts are controlled according to the temperature and humidity adjustment direction.

8. The temperature and humidity control method according to claim 7, characterized in that: The indoor heat exchanger includes a first heat exchange part and a second heat exchange part, and the total outlet air temperature and the total outlet air dew point temperature are determined according to the air volume ratio, the detected temperature and the detected humidity of each heat exchange part of the indoor heat exchanger, including: The total air outlet temperature and total air outlet humidity are determined according to the following formula: G=G A +G B G×T act =G A ×T act-A +G B ×T act-B G×d act =G A ×d act-A +G B ×d act-B Among them, G is the total air volume, G A is the air volume corresponding to the first heat exchange part, G B is the air volume corresponding to the second heat exchange part, T act is the total outlet air temperature, T act-A is the outlet air temperature corresponding to the first heat exchange part, T act-B is the outlet air temperature corresponding to the second heat exchange part, d act is the total outlet humidity, d act-A is the outlet humidity of the first heat exchange part, d act-B is the outlet air humidity corresponding to the second heat exchange part; The total outlet air dew point temperature is determined according to the total outlet air temperature and the total outlet air humidity.

9. The temperature and humidity control method according to claim 8, characterized in that: Determining the temperature and humidity adjustment direction according to the comparison results between the target temperature and the total air outlet temperature, and between the target dew point temperature and the total air outlet dew point temperature, including: When the target temperature is greater than the total air outlet temperature, and the target dew point temperature is greater than the total air outlet dew point temperature, the temperature and humidity adjustment direction is cooling and dehumidification; When the target temperature is greater than the total air outlet temperature, and the target dew point temperature is less than the total air outlet dew point temperature, the temperature and humidity adjustment direction is cooling and humidification; When the target temperature is lower than the total air outlet temperature and the target dew point temperature is higher than the total air outlet dew point temperature, the temperature and humidity adjustment direction is heating and dehumidification; When the target temperature is lower than the total air outlet temperature, and the target dew point temperature is lower than the total air outlet dew point temperature, the temperature and humidity adjustment direction is heating and humidification.

10. The temperature and humidity control method according to claim 8, characterized in that: The obtaining of target temperature and humidity comprises: Accepting control instructions sent by the terminal and / or the cloud server, and parsing the control instructions to obtain target temperature and target humidity; After determining the total outlet air temperature and the total outlet air dew point temperature according to the air volume ratio of each heat exchange part of the indoor heat exchanger, the detected temperature and the detected humidity, the method further includes: The total outlet air temperature, the total outlet air humidity and the total outlet air dew point temperature are transmitted to the terminal and / or the cloud server.

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