Heat exchange device, control method of heat exchange device, storage medium and program product

Abstract

The invention relates to a heat exchange device, a control method of the heat exchange device, a storage medium and a program product. The heat exchange device comprises an indoor heat exchanger and an outdoor throttling device, wherein the outdoor throttling device is connected with an inlet of the indoor heat exchanger; the indoor heat exchanger comprises at least three heat exchange tube sets and a plurality of indoor throttling devices, and each indoor throttling device is connected with at least one of the at least three heat exchange tube sets. The multiple indoor throttling devices are used for adjusting the heat exchange mode of at least one heat exchange pipe set according to the outdoor unit refrigerant temperature of the heat exchange device under the condition that the outdoor throttling device is fully opened so that the indoor heat exchanger can conduct constant-temperature dehumidification. Different constant-temperature dehumidification modes can be selected based on different refrigerant temperatures of the outdoor unit, and the heat exchange efficiency of the indoor heat exchanger is improved while the constant-temperature dehumidification effect is guaranteed.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning technology, and in particular to a heat exchange device, a control method for the heat exchange device, a storage medium, and a program product. Background Technology

[0002] Most existing air conditioners have dehumidification functions. For example, air conditioners can remove heat from indoor air and remove some moisture through the circulation of heat absorption by the evaporation of refrigerant in the indoor heat exchanger and heat dissipation by the condensation of refrigerant in the outdoor heat exchanger.

[0003] In the dehumidification solutions for air conditioners provided in related technologies, both the dehumidification effect and user experience need to be improved. Summary of the Invention

[0004] To overcome the problems existing in the related technologies, this disclosure provides a heat exchange device, a control method for the heat exchange device, a storage medium, and a program product.

[0005] According to a first aspect of the present disclosure, a heat exchange device is provided, comprising: an indoor heat exchanger and an outdoor throttling device; the outdoor throttling device is connected to the inlet of the indoor heat exchanger, the indoor heat exchanger includes at least three heat exchange tube groups and a plurality of indoor throttling devices, each indoor throttling device being connected to at least one of the at least three heat exchange tube groups; the plurality of indoor throttling devices are configured to, when the outdoor throttling device is fully open, adjust the heat exchange mode of at least one of the at least three heat exchange tube groups according to the refrigerant temperature of the outdoor unit of the heat exchange device, so that the indoor heat exchanger performs constant temperature dehumidification.

[0006] By employing the aforementioned heat exchange device, and designing the indoor heat exchanger to include at least three heat exchange tube groups and multiple indoor throttling devices, the heat exchange mode of at least one heat exchange tube group can be adjusted according to the outdoor unit refrigerant temperature based on these multiple indoor throttling devices. This allows for the selection of different constant temperature dehumidification methods based on the different outdoor unit refrigerant temperatures, ensuring constant temperature dehumidification while improving the heat exchange efficiency of the indoor heat exchanger.

[0007] In some possible implementations, the at least three heat exchanger tube groups include a first heat exchanger tube group, a second heat exchanger tube group, and a third heat exchanger tube group; the plurality of indoor throttling devices include a first indoor throttling device and a second indoor throttling device; the outlet of the first heat exchanger tube group is connected to the inlet of the third heat exchanger tube group through the first indoor throttling device, the second indoor throttling device is connected between the inlet of the first heat exchanger tube group and the inlet of the second heat exchanger tube group, the inlet of the first heat exchanger tube group and the inlet of the second indoor throttling device are also connected to the outdoor throttling device, and the outlet of the second heat exchanger tube group is connected to the outlet of the third heat exchanger tube group.

[0008] By adopting this implementation method, based on the first indoor throttling device and the second indoor throttling device, the heat exchange mode of at least one heat exchange tube group is adjusted according to the temperature of the outdoor unit refrigerant, thereby realizing the selection of different constant temperature dehumidification methods based on the different temperatures of the outdoor unit refrigerant.

[0009] In some possible implementations, the plurality of indoor throttling devices further includes a third indoor throttling device and a fourth indoor throttling device; The outlet of the second heat exchange tube assembly is connected to the inlet of the third indoor throttling device, the outlet of the third heat exchange tube assembly is connected to the inlet of the fourth indoor throttling device, and the outlet of the third indoor throttling device is connected to the outlet of the fourth indoor throttling device.

[0010] By adopting this embodiment, based on the third and fourth indoor throttling devices, by controlling the throttling devices of the third and fourth indoor throttling devices, it is possible to prevent the gas and liquid of the refrigerant at the outlet of the second heat exchange tube group and the refrigerant at the outlet of the third heat exchange tube group from directly mixing, which could lead to equipment damage.

[0011] In some possible implementations, the third heat exchange tube assembly includes multiple units, the first indoor throttling device includes multiple units, and the fourth indoor throttling device includes multiple units; The outlet of the first heat exchange tube group is connected to the inlet of a different third heat exchange tube group through different first indoor throttling devices, and the outlet of the different third heat exchange tube groups is connected to the inlet of a different fourth indoor throttling device.

[0012] By adopting this implementation method, multiple parallel third heat exchange tube groups are set up, providing a hardware foundation for the heat exchange device to support more types of constant temperature dehumidification methods.

[0013] In some possible implementations, the heat exchange device further includes a compressor; The outlets of the third indoor throttling device and the fourth indoor throttling device are connected to the compressor.

[0014] By adopting this implementation method, the outlets of the third and fourth indoor throttling devices are connected to the compressor. In this way, based on the control of the throttling state of the third and fourth indoor throttling devices, it is possible to prevent the gas-liquid mixture of the refrigerant at the outlet of the second heat exchange tube group and the refrigerant at the outlet of the third heat exchange tube group from directly mixing and impacting the compressor, which could lead to equipment damage.

[0015] In some possible implementations, the diameter of the third heat exchange tube group is larger than that of the first heat exchange tube group and the second heat exchange tube group, wherein the diameters of the first heat exchange tube group and the second heat exchange tube group are the same.

[0016] In this implementation method, since the heat exchange efficiency varies depending on the diameter of the heat exchange tube group, by setting the diameter of the third heat exchange tube group to be larger than that of the first and second heat exchange tube groups, more constant temperature dehumidification methods can be provided, thereby improving the overall heat exchange efficiency of the system.

[0017] In some possible implementations, the heat exchange tube assembly includes at least two rows of refrigerant lines that are parallel to each other.

[0018] By adopting this implementation method, heat exchange efficiency can be improved compared to a single row of refrigerant pipes by setting at least two rows of parallel refrigerant pipes.

[0019] In some possible implementations, the inlet and outlet of the refrigerant in the heat exchanger tube assembly are located in different rows.

[0020] By sampling this implementation method, the inlet and outlet of the refrigerant in the heat exchange tube group are located in different rows, which can make the refrigerant flow direction opposite to the air flow direction during heating, thereby improving the heat exchange efficiency during heating and thus improving the overall heat exchange efficiency of the air conditioner.

[0021] In some possible implementations, the heat exchange device includes an air conditioner.

[0022] By adopting this implementation method, the indoor heat exchanger of the air conditioner is designed to include at least three heat exchange tube groups and multiple indoor throttling devices. Based on these multiple indoor throttling devices, the heat exchange mode of at least one heat exchange tube group is adjusted according to the temperature of the refrigerant in the outdoor unit. This enables the air conditioner to select different constant temperature dehumidification methods based on the different temperatures of the refrigerant in the outdoor unit, ensuring the constant temperature dehumidification effect while improving the heat exchange efficiency of the air conditioner.

[0023] According to a second aspect of the present disclosure, a control method for a heat exchange device is provided, applied to the heat exchange device provided in the first aspect of the present disclosure, the method comprising: In response to receiving a dehumidification command, when the indoor ambient temperature is less than or equal to the set temperature of the heat exchange device, the outdoor unit refrigerant temperature of the heat exchange device is obtained. Based on the outdoor unit refrigerant temperature, the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger is adjusted through the outdoor throttling device and the plurality of indoor throttling devices. Constant temperature dehumidification is performed based on the heat exchange mode of the adjusted heat exchange tube assembly.

[0024] Using the above method, based on the multiple indoor throttling devices, the heat exchange mode of at least one heat exchange tube group is adjusted according to the temperature of the outdoor unit refrigerant. This allows for the selection of different constant temperature dehumidification methods based on the different temperatures of the outdoor unit refrigerant, ensuring the constant temperature dehumidification effect while improving the heat exchange efficiency of the indoor heat exchanger.

[0025] In some possible implementations, adjusting the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger based on the outdoor unit refrigerant temperature, through the outdoor throttling device and the plurality of indoor throttling devices, includes: The constant temperature dehumidification method of the indoor heat exchanger is determined based on the refrigerant temperature of the outdoor unit. Different constant temperature dehumidification methods have different heating capacities. Among them, the lower the refrigerant temperature of the outdoor unit, the smaller the heating capacity required by the indoor heat exchanger. According to the constant temperature dehumidification method, the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger is adjusted by the outdoor throttling device and the plurality of indoor throttling devices.

[0026] Using this implementation method, the constant temperature dehumidification mode of the indoor heat exchanger can be determined based on the outdoor unit refrigerant temperature, and the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger can be adjusted to ensure the constant temperature dehumidification effect.

[0027] In some possible implementations, adjusting the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger based on the outdoor unit refrigerant temperature, through the outdoor throttling device and the plurality of indoor throttling devices, includes: Based on the outdoor unit refrigerant temperature, the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger is adjusted by adjusting the throttling state of the outdoor throttling device and the at least one indoor throttling device.

[0028] By adopting this implementation method, the heat exchange mode of each heat exchange tube group in the indoor heat exchanger can be adjusted by adjusting the throttling state of the outdoor throttling device and at least one indoor throttling device, and then a constant temperature dehumidification method that matches the refrigerant temperature of the outdoor unit can be selected for constant temperature dehumidification.

[0029] In some possible implementations, adjusting the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger based on the outdoor unit refrigerant temperature by adjusting the throttling state of the outdoor throttling device and at least one of the indoor throttling devices includes: When the refrigerant temperature of the outdoor unit is less than or equal to a preset temperature threshold, the outdoor throttling device is fully opened, the first indoor throttling device and the second indoor throttling device are throttled, and the third indoor throttling device and the fourth indoor throttling device are fully opened, so that the first heat exchange tube group is in heating mode and the second heat exchange tube group and the at least one third heat exchange tube group are in cooling and dehumidification mode.

[0030] By adopting this implementation method, when the refrigerant temperature of the outdoor unit is lower than the preset temperature threshold, the constant temperature dehumidification method with the shortest heating section can be selected, which ensures the constant temperature dehumidification effect while improving the heat exchange efficiency.

[0031] In some possible implementations, adjusting the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger based on the outdoor unit refrigerant temperature by adjusting the throttling state of the outdoor throttling device and at least one of the indoor throttling devices includes: If the outdoor unit refrigerant temperature is greater than a preset temperature threshold, and the temperature difference between the set temperature and the indoor ambient temperature is less than or equal to the preset temperature difference threshold, the outdoor throttling device is fully opened, the first indoor throttling device is fully opened, and the second indoor throttling device is throttled, so that the first heat exchange tube group and the third heat exchange tube group are in heating mode and the second heat exchange tube group is in cooling and dehumidification mode.

[0032] By adopting this implementation method, when the refrigerant temperature of the outdoor unit is greater than the preset temperature threshold, the heat exchange mode of each heat exchange tube group can be adjusted based on the temperature difference between the set temperature and the indoor ambient temperature, which further improves the matching degree between the constant temperature dehumidification method and the temperature requirements in the actual scenario and enhances the user experience.

[0033] In some possible implementations, the method further includes: The third indoor throttling device is fully opened, and the fourth indoor throttling device is throttled, so as to adjust the liquid refrigerant output by the third heat exchange tube group into a low-pressure gaseous refrigerant.

[0034] By using this implementation method, the liquid refrigerant output from the third heat exchanger tube group can be adjusted to a low-pressure gaseous refrigerant by controlling the third indoor throttling device to be fully open and the fourth indoor throttling device to be throttled. This can prevent the high-pressure liquid refrigerant at the outlet of the third heat exchanger tube group and the medium-low pressure gaseous refrigerant at the outlet of the second heat exchanger tube group from directly mixing, which could cause liquid slugging in the compressor and damage the equipment.

[0035] In some possible implementations, adjusting the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger based on the outdoor unit refrigerant temperature by adjusting the throttling state of the outdoor throttling device and at least one of the indoor throttling devices includes: If the outdoor unit refrigerant temperature is greater than a preset temperature threshold, and the temperature difference between the set temperature and the indoor ambient temperature is greater than a preset temperature difference threshold, the outdoor throttling device is fully opened, the first indoor throttling device is throttled, and the second indoor throttling device is fully opened, so that the first heat exchanger tube group and the second heat exchanger tube group are in heating mode, and the third heat exchanger tube group is in cooling and dehumidification mode.

[0036] Using this implementation method, when the temperature difference between the set temperature and the indoor ambient temperature is greater than the preset temperature difference threshold, the constant temperature dehumidification method with strong heating capacity (i.e., the first and second heat exchange tube groups heat, and the third heat exchange tube group cools and dehumidifies) can be selected by adjusting the throttling state of the outdoor throttling device and the indoor throttling device to ensure the constant temperature dehumidification effect.

[0037] In some possible implementations, the method further includes: The third indoor throttling device is controlled to throttle, and the fourth indoor throttling device is fully opened, so as to adjust the liquid refrigerant output from the second heat exchange tube group into a low-pressure gaseous refrigerant.

[0038] This implementation method can prevent the high-pressure liquid refrigerant at the outlet of the second heat exchanger tube group and the medium- and low-pressure gaseous refrigerant at the outlet of the third heat exchanger tube group from directly mixing, thus preventing liquid slugging into the compressor and causing equipment damage.

[0039] In some possible implementations, the method further includes: When the indoor ambient temperature is less than or equal to the set temperature of the heat exchange device, the speed of the outdoor unit fan of the heat exchange device is reduced to the target speed based on the outdoor unit refrigerant temperature and / or temperature difference, wherein the temperature difference is the temperature difference between the set temperature and the indoor ambient temperature. The constant temperature dehumidification based on the adjusted heat exchanger tube group heat exchange mode includes: Based on the adjusted heat exchange mode of the heat exchange tube assembly and the target rotation speed, constant temperature dehumidification is performed.

[0040] By adopting this implementation method, when controlling the heat exchange device to perform constant temperature dehumidification, the outdoor unit fan speed can be reduced to avoid further reduction of the outdoor unit outlet temperature, which would affect the heating capacity of the indoor heat exchanger heating section.

[0041] In some possible implementations, the method further includes: In response to receiving a dehumidification command, if the indoor ambient temperature is higher than the set temperature of the heat exchange device, dehumidification is performed based on the cooling dehumidification mode of the heat exchange device.

[0042] By adopting this embodiment, based on the heat exchange device of this disclosure, a dehumidification mode can be selected for dehumidification when both dehumidification and cooling needs are determined.

[0043] In some possible implementations, the dehumidification based on the cooling and dehumidification mode of the heat exchange device includes: The outdoor throttling device is controlled to throttle, and the multiple indoor throttling devices are fully opened, so that the heat exchange device dehumidifies based on the cooling and dehumidification mode.

[0044] By adopting this implementation method, the cooling and dehumidification function of the heat exchange device can be realized by controlling the throttling state of the outdoor throttling device and multiple indoor throttling devices.

[0045] In some possible implementations, the method further includes: In response to receiving a target heat exchange command, the outdoor throttling device is controlled to throttle, and the plurality of indoor throttling devices are fully opened, so that the heat exchange device performs the heat exchange operation corresponding to the target heat exchange command; wherein, the target heat exchange command includes a cooling command or a heating command.

[0046] Using this implementation method, based on the hardware design of the heat exchange device provided in this disclosure, the user's basic cooling and heating needs can also be met.

[0047] According to a third aspect of the present disclosure, a computer-readable storage medium is provided that stores computer program instructions thereon, which, when executed by a processor, implement the steps of the control method for the heat exchange apparatus provided in the second aspect of the present disclosure.

[0048] According to a fourth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the control method for the heat exchange apparatus provided in the second aspect of the present disclosure.

[0049] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: by designing an indoor heat exchanger including at least three heat exchange tube groups and multiple indoor throttling devices, and based on the multiple indoor throttling devices, the heat exchange mode of at least one heat exchange tube group is adjusted according to the temperature of the outdoor unit refrigerant, thereby enabling different constant temperature dehumidification methods to be selected based on the different temperatures of the outdoor unit refrigerant, ensuring the constant temperature dehumidification effect while improving the heat exchange efficiency of the indoor heat exchanger.

[0050] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0051] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0052] Figure 1 This is a structural block diagram of a heat exchange device according to an exemplary embodiment.

[0053] Figure 2 It is based on Figure 1 The illustrated embodiment shows a structural block diagram of another heat exchange device.

[0054] Figure 3 It is based on Figure 2 The illustrated embodiment shows a structural block diagram of another heat exchange device.

[0055] Figure 4 It is based on Figure 3 The illustrated embodiment shows a structural block diagram of another heat exchange device.

[0056] Figure 5 It is based on Figure 3 The illustrated embodiment shows a schematic diagram of the structure of an indoor heat exchanger.

[0057] Figure 6 It is based on Figure 4 The illustrated embodiment shows a schematic diagram of another indoor heat exchanger.

[0058] Figure 7 This is a flowchart illustrating a control method for a heat exchange device according to an exemplary embodiment.

[0059] Figure 8 It is based on Figure 7 The illustrated embodiment shows a flowchart of a control method for a heat exchange device. Detailed Implementation

[0060] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0061] It should be noted that all actions involving the acquisition of signals, information, or data in this disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with authorization from the owner of the relevant device.

[0062] This disclosure is primarily applied to dehumidification control scenarios using heat exchange devices. These heat exchange devices may include, for example, air conditioners. Related technologies provide several dehumidification solutions for air conditioners, including: one employing refrigeration dehumidification, which lowers indoor humidity but also reduces indoor temperature, leading to a decrease in indoor comfort; another method uses electric auxiliary heating to maintain a constant indoor temperature during refrigeration dehumidification; and yet another employs a unique heat exchanger design that increases indoor temperature while lowering indoor humidity.

[0063] However, the dehumidification solutions provided in these technologies are all fixed dehumidification methods, which cannot be adapted to different situations. They also have low heat exchange efficiency, and the dehumidification effect and user experience need to be improved.

[0064] To address the aforementioned problems, this disclosure provides a heat exchange device, a control method for the heat exchange device, a storage medium, and a program product. The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0065] Figure 1 This is a structural block diagram illustrating a heat exchange device according to an exemplary embodiment, which may be, for example, an air conditioner. Figure 1 As shown, the heat exchange device 10 includes: an indoor heat exchanger 101 and an outdoor throttling device 102; the outdoor throttling device 102 is connected to the inlet of the indoor heat exchanger 101, and the indoor heat exchanger 101 includes at least three heat exchange tube assemblies 1011 and multiple indoor throttling devices 1012. Figure 1 The example shows three heat exchanger tube bundles and two indoor throttling devices, each indoor throttling device 1012 being connected to at least one of the three heat exchanger tube bundles 1011; like Figure 1 As shown, the outdoor throttling device 102 is connected to the inlet of at least one heat exchange tube assembly 1011 (which is typically the refrigerant input port), and each heat exchange tube assembly 1011 is connected to at least one indoor throttling device 1012.

[0066] The plurality of indoor throttling devices 1012 can be used to adjust the heat exchange mode of at least one of the at least three heat exchanger tube groups 1011 according to the refrigerant temperature of the outdoor unit of the heat exchanger when the outdoor throttling device 102 is fully open, so that the indoor heat exchanger 101 can perform constant temperature dehumidification. The heat exchange mode may include a heating mode or a cooling dehumidification mode.

[0067] The throttling devices involved in this disclosure (including indoor throttling device 1012 and outdoor throttling device 102) refer to devices in heat exchangers that "cool and depressurize" (change from a high-temperature, high-pressure liquid to a low-temperature, low-pressure mist) the high-pressure liquid refrigerant and can precisely control the refrigerant flow rate. These throttling devices can be, for example, expansion valves or capillary tubes. It is understood that indoor throttling device 1012 refers to the throttling device installed in the indoor unit of the air conditioner, and outdoor throttling device 102 refers to the throttling device installed in the outdoor unit of the air conditioner. After passing through the throttling device, the refrigerant can change from a high-temperature, high-pressure liquid to a low-temperature, low-pressure gaseous state. If the throttling device is fully open, it does not have the function of cooling and depressurizing.

[0068] In addition, taking the air conditioning cooling mode as an example, the indoor heat exchanger 101 may include the evaporator in the indoor unit.

[0069] Each heat exchanger tube assembly 1011 includes a refrigerant inlet and an outlet. The inlet is the refrigerant input port, and the outlet is the refrigerant output port. These inlets and outlets are located in different rows of the heat exchanger tube assembly. For example... Figure 1 As shown, the arrows indicate the direction of refrigerant flow. Each heat exchanger tube assembly includes a refrigerant inlet on the left and a refrigerant outlet on the right.

[0070] In addition, the refrigerant temperature of the outdoor unit can include the refrigerant temperature of the outdoor unit at different locations, such as the compressor outlet temperature, the outdoor unit external pipe temperature, and the outdoor heat exchanger outlet temperature.

[0071] The temperature of the refrigerant in the outdoor unit corresponds to the temperature change trend of the refrigerant at the outlet of the heat exchanger tube assembly used for heating. The higher the refrigerant temperature in the outdoor unit, the higher the refrigerant temperature at the outlet of the heat exchanger tube assembly used for heating; conversely, the lower the refrigerant temperature in the outdoor unit, the lower the refrigerant temperature at the outlet of the heat exchanger tube assembly used for heating. If the refrigerant temperature at the outlet of the heat exchanger tube assembly is too low, the subsequent heating mode of the heat exchanger tube assembly may no longer be able to provide heating (i.e., it will not have heating capacity). Even if there is a longer heating section, it will not have heating capacity, so no further heating is needed. Therefore, the lower the refrigerant temperature in the outdoor unit, the shorter the heating section of the constant temperature dehumidification method can be selected, thereby improving the heat exchange efficiency of the heat exchange device while achieving constant temperature dehumidification. Therefore, this disclosure allows adjustment of the heat exchange mode of at least one heat exchanger tube assembly based on the outdoor unit refrigerant temperature to select different constant temperature dehumidification methods for different situations.

[0072] It should be noted that, upon receiving a dehumidification command, this disclosure can first determine whether the indoor ambient temperature is less than or equal to the set temperature of the heat exchanger. If the indoor ambient temperature is greater than the set temperature, the air conditioner's cooling dehumidification mode can be activated to dehumidify while simultaneously lowering the indoor ambient temperature to the set temperature. If the indoor ambient temperature is less than or equal to the set temperature of the heat exchanger, dehumidifying using the cooling dehumidification mode of the heat exchanger may further lower the indoor ambient temperature, causing it to fall below the set temperature and resulting in user discomfort. Therefore, to avoid further lowering the indoor ambient temperature while dehumidifying, this disclosure can perform constant-temperature dehumidification. That is, when the indoor ambient temperature is determined to be less than or equal to the set temperature of the heat exchanger, the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger can be adjusted through the multiple indoor throttling devices 1012 to achieve constant-temperature dehumidification.

[0073] By employing the aforementioned heat exchange device, and designing the indoor heat exchanger to include at least three heat exchange tube groups and multiple indoor throttling devices, and based on these multiple indoor throttling devices, when the outdoor throttling device is fully open, the heat exchange mode of at least one heat exchange tube group is adjusted according to the temperature of the outdoor refrigerant. This allows for the selection of different constant temperature dehumidification methods based on the different temperatures of the outdoor refrigerant, ensuring the constant temperature dehumidification effect while improving the heat exchange efficiency of the indoor heat exchanger.

[0074] Figure 2 It is based on Figure 1 The illustrated embodiment shows a structural block diagram of another heat exchange device. In one possible embodiment of this disclosure, such as... Figure 2 As shown, the at least three heat exchange tube groups 1011 include a first heat exchange tube group 10111, a second heat exchange tube group 10112, and a third heat exchange tube group 10113; the plurality of indoor throttling devices 1012 include a first indoor throttling device 10121 and a second indoor throttling device 10122.

[0075] like Figure 2 As shown, the outlet of the first heat exchange tube group 10111 is connected to the inlet of the third heat exchange tube group 10113 through the first indoor throttling device 10121. The inlet of the first heat exchange tube group 10111 is connected to the inlet of the second heat exchange tube group 10112 through the second indoor throttling device 10122. The inlet of the first heat exchange tube group 10111 and the inlet of the second indoor throttling device 10122 are also connected to the outdoor throttling device 102. The outlet of the second heat exchange tube group 10112 is connected to the outlet of the third heat exchange tube group 10113.

[0076] In this way, by controlling the outdoor throttling device 102 to be fully open, and based on the outdoor unit refrigerant temperature, controlling the first indoor throttling device and / or the second indoor throttling device to enter the throttling state, the heat exchange mode of at least one of the heat exchange tube groups can be controlled, so that the indoor heat exchanger 101 performs constant temperature dehumidification based on the adjusted heat exchange tube group heat exchange mode.

[0077] For example, when the outdoor throttling device 102 is fully open, if both the first indoor throttling device 10121 and the second indoor throttling device 10122 are in a throttling state, the first heat exchange tube group 10111 performs heating, and the second heat exchange tube group 10112 and the third heat exchange tube group 10113 perform cooling and dehumidification; if the first indoor throttling device 10121 is in a throttling state and the second indoor throttling device 10122 is fully open, the first heat exchange tube group 10111 and the second heat exchange tube group 10112 perform heating, and the third heat exchange tube group 10113 performs cooling and dehumidification; if the first indoor throttling device 10121 is fully open and the second indoor throttling device 10122 is in a throttling state, the first heat exchange tube group 10111 and the third heat exchange tube group 10113 perform heating, and the second heat exchange tube group 10112 performs cooling and dehumidification. Therefore, when the first indoor throttling device 10121 or the second indoor throttling device 10122 is in a throttling state, the length of the heating section is greater than the length of the heating section when both the first indoor throttling device 10121 and the second indoor throttling device 10122 are in a throttling state. In this way, the heat exchange mode of each heat exchange tube group in the indoor heat exchanger can be controlled through these multiple indoor throttling devices. By controlling at least one heat exchange tube group to be in cooling / dehumidification mode and at least one heat exchange tube group to be in heating mode, constant temperature dehumidification of the indoor environment where the heat exchanger is located can be achieved.

[0078] As mentioned above, when the first indoor throttling device 10121 or the second indoor throttling device 10122 is in a throttling state, the length of the heating section is greater than the length of the heating section when both the first indoor throttling device 10121 and the second indoor throttling device 10122 are in a throttling state. Therefore, if the outdoor unit refrigerant temperature is lower than the preset temperature threshold, a constant temperature dehumidification mode with a shorter heating section can be selected, which means that both the first indoor throttling device 10121 and the second indoor throttling device 10122 can be controlled to be in a throttling state.

[0079] In addition, after the outlet of the second heat exchange tube group 10112 is connected in parallel with the outlet of the third heat exchange tube group 10113, it can be connected to the compressor (not shown in the figure). After the compressor is connected to the heat exchange tube group of the outdoor unit (such as the condenser in the cooling mode), it is connected to the outdoor throttling device 102 through the heat exchange tube group of the outdoor unit to form a refrigerant circulation path.

[0080] Figure 3 It is based on Figure 2 The illustrated embodiment shows a structural block diagram of another heat exchange device. In another possible embodiment of this disclosure, such as... Figure 3 As shown, the plurality of indoor throttling devices also include a third indoor throttling device 10123 and a fourth indoor throttling device 10124; The outlet of the second heat exchange tube assembly 10112 is connected to the inlet of the third indoor throttling device 10123, the outlet of the third heat exchange tube assembly 10113 is connected to the inlet of the fourth indoor throttling device 10124, and the outlets of the third indoor throttling device 10123 and the fourth indoor throttling device 10124 are connected.

[0081] like Figure 3 As shown, the heat exchange device also includes a compressor 103, and the outlets of the third indoor throttling device 10123 and the fourth indoor throttling device 10124 are connected to the compressor 103.

[0082] In this way, by controlling the throttling state of the third indoor throttling device 10123 and the fourth indoor throttling device 10124, it is possible to prevent the high-pressure liquid refrigerant at the outlet of the third heat exchange tube group 10113 from directly mixing with the medium- and low-pressure gaseous refrigerant at the outlet of the second heat exchange tube group 10112 (or, the high-pressure liquid refrigerant at the outlet of the second heat exchange tube group 10112 and the medium- and low-pressure gaseous refrigerant at the outlet of the third heat exchange tube group 10113), thus preventing liquid from slugging into the compressor 103 and causing equipment damage.

[0083] Figure 4 It is based on Figure 3 The illustrated embodiment shows a structural block diagram of another heat exchange device. In another possible embodiment of this disclosure, such as... Figure 4 As shown, the third heat exchange tube group 10113 includes multiple units, and the multiple third heat exchange tube groups 10113 are connected in parallel. Correspondingly, the first indoor throttling device 10121 includes multiple units, and the fourth indoor throttling device 10124 includes multiple units. The outlet of the first heat exchange tube group is connected to the inlet of the different third heat exchange tube groups 10113 through different first indoor throttling devices 10121, and the outlet of the different third heat exchange tube groups 10113 is connected to the inlet of the different fourth indoor throttling devices 10124.

[0084] In this way, based on the multiple parallel third heat exchange tube groups 10113, combined with the first heat exchange tube group 10111 and the second heat exchange tube group 10112 and multiple indoor throttling devices, by controlling the throttling state of at least one of the multiple indoor throttling devices, more constant temperature dehumidification methods can be provided to meet a variety of different constant temperature dehumidification needs.

[0085] Different heat exchanger tube diameters result in different heat exchange efficiencies; increasing the tube diameter slows down the refrigerant flow rate and reduces heat exchange efficiency. In another possible implementation of this disclosure, the diameter of the third heat exchanger tube group 10113 can be set to be larger than that of the first heat exchanger tube group 10111 and the second heat exchanger tube group 10112, while the diameters of the first heat exchanger tube group 10111 and the second heat exchanger tube group 10112 are the same. This allows for a wider variety of constant temperature dehumidification methods.

[0086] For example, for Figure 2 and Figure 3 The structure of the heat exchange device shown allows for the following configuration: with the outdoor throttling device 102 fully open, if the first indoor throttling device 10121 is in a throttling state and the second indoor throttling device 10122 is fully open, the first heat exchange tube group 10111 and the second heat exchange tube group 10112 perform heating, while the third heat exchange tube group 10113 performs cooling and dehumidification. If the first indoor throttling device 10121 is fully open and the second indoor throttling device 10122 is in a throttling state, the first heat exchange tube group 10111 and the third heat exchange tube group 10113 perform heating, while the second heat exchange tube group 10112 performs cooling and dehumidification. Therefore, the length of the heating section when the first indoor throttling device 10121 is in a throttling state is the same as the length of the heating section when the second indoor throttling device 10122 is in a throttling state. If the pipe diameters of the three heat exchange tube groups are the same, their heat exchange efficiencies are also the same. When the first heat exchanger assembly 10111 and the second heat exchanger assembly 10112 have the same pipe diameter, while the third heat exchanger assembly 10113 has a larger pipe diameter, the refrigerant flow rate slows down due to the larger pipe diameter, resulting in lower heat exchange efficiency. Therefore, compared to using the first and second heat exchanger assemblies 10111 and 10112 for heating, using both the first and third heat exchanger assemblies 10111 and 10113 for heating has a weaker heating capacity. Thus, in practical constant temperature dehumidification scenarios, different constant temperature dehumidification methods can be selected according to actual heating needs, improving the overall heat exchange efficiency of the air conditioning system.

[0087] For example, Figure 5 It is based on Figure 3 The illustrated embodiment shows a schematic diagram of the structure of an indoor heat exchanger, as shown below. Figure 5 As shown, the third heat exchanger tube group 10113 has the largest tube diameter. Based on Figure 5 The topology of the indoor heat exchanger shown can provide the following constant temperature dehumidification methods: Constant temperature dehumidification mode 1: By controlling the first indoor throttling device 10121 and the second indoor throttling device 10122 to throttle, and the third indoor throttling device 10123 and the fourth indoor throttling device 10124 to be fully open, the first heat exchange tube group 10111 can be heated, and the second heat exchange tube group 10112 and the third heat exchange tube group 10113 can be cooled and dehumidified.

[0088] Constant temperature dehumidification method 2: By controlling the first indoor throttling device 10121 to be fully open, the second indoor throttling device 10122 to throttle, the third indoor throttling device 10123 to be fully open, and the fourth indoor throttling device 10124 to throttle, the first heat exchange tube group 10111 and the third heat exchange tube group 10113 can heat, while the second heat exchange tube group 10112 can cool and dehumidify. Furthermore, by setting the third indoor throttling device 10123 to be fully open and the fourth indoor throttling device 10124 to throttle, the direct mixing of the high-pressure liquid refrigerant at the outlet of the third heat exchange tube group 10113 and the medium-low pressure gaseous refrigerant at the outlet of the second heat exchange tube group 10112 can be prevented, thus avoiding liquid slugging into the compressor 103 and causing equipment damage.

[0089] Constant temperature dehumidification method 3: By controlling the first indoor throttling device 10121 to throttle and the second indoor throttling device 10122 to be fully open, the first heat exchange tube group 10111 and the second heat exchange tube group 10112 can heat, and the third heat exchange tube group 10113 can cool and dehumidify; by controlling the third indoor throttling device 10123 to throttle and the fourth indoor throttling device 10124 to be fully open, the high-pressure liquid refrigerant at the outlet of the second heat exchange tube group 10112 and the medium and low-pressure gaseous refrigerant at the outlet of the third heat exchange tube group 10113 can be prevented from directly mixing, causing liquid to slam into the compressor 103, which would damage the equipment.

[0090] Of the three constant-temperature dehumidification methods mentioned above, methods 2 and 3 have the same heating section length, but different pipe diameters. In method 2, the refrigerant flows from the first heat exchange tube group 10111 to the third heat exchange tube group 10113. Due to the larger pipe diameter, the flow rate slows down, and the heat exchange efficiency decreases. Therefore, the heating capacity of constant-temperature dehumidification method 2 is relatively weaker than that of method 3. Therefore, when ranking the three constant-temperature dehumidification methods according to their heating capacity, the order is: Constant-temperature dehumidification method 1 < Constant-temperature dehumidification method 2 < Constant-temperature dehumidification method 3. In this way, a suitable constant-temperature dehumidification method can be selected from these three methods based on the refrigerant temperature of the outdoor unit of the heat exchange device to improve the heat exchange efficiency of the heat exchange device.

[0091] Figure 6 It is based on Figure 4 The illustrated embodiment shows a schematic diagram of another indoor heat exchanger, as shown below. Figure 6 As shown, the indoor heat exchanger includes at least two third heat exchange tube groups 10113 connected in parallel, and the third heat exchange tube group 10113 has the largest diameter. Figure 5 Similar logic, based on Figure 6 The topology of the indoor heat exchanger shown can also provide a variety of constant temperature dehumidification methods.

[0092] In addition, the heat exchanger tube assembly provided in this disclosure includes at least two rows of refrigerant pipes that are parallel to each other. For example, such as... Figure 5 and Figure 6As shown, each heat exchanger tube assembly may include two rows of parallel refrigerant pipes on the left and right sides. This disclosure improves heat exchange efficiency compared to a single row of refrigerant pipes by providing at least two rows of parallel refrigerant pipes.

[0093] In this embodiment of the disclosure, such as Figure 5 and Figure 6 As shown, the refrigerant inlet and outlet of each heat exchanger tube group are located in different rows. This hardware design can also improve the overall heat exchange efficiency. The reason is that the indoor heat exchanger has an air inlet and an air outlet. The refrigerant flow direction is the same as the airflow direction, which is considered co-current, and the opposite of the airflow direction, which is considered counter-current. When the fluid and air flow in opposite directions, the heat exchange efficiency is higher. When heating, the refrigerant flow direction is opposite to the airflow direction. The present disclosure sets the refrigerant inlet and outlet in different rows, which can make the refrigerant flow direction opposite to the airflow direction during heating, thereby improving the heat exchange efficiency during heating, and thus improving the overall heat exchange efficiency of the air conditioner.

[0094] Figure 7 This is a flowchart illustrating a control method for a heat exchange device according to an exemplary embodiment, which can be applied to the heat exchange device provided in the above embodiments. Figure 7 As shown, the method includes the following steps: In step S701, in response to receiving a dehumidification command, the outdoor unit refrigerant temperature of the heat exchanger is obtained when the indoor ambient temperature is less than or equal to the set temperature of the heat exchanger.

[0095] When a dehumidification command is received, the heat exchanger typically operates in cooling dehumidification mode. However, while cooling dehumidification reduces indoor humidity, it also lowers the indoor temperature. If the indoor ambient temperature is lower than or equal to the heat exchanger's set temperature, continuing to operate in cooling dehumidification mode will inevitably cause a further drop in indoor temperature, reducing indoor comfort and impacting user experience. Therefore, this disclosure allows for the activation of a constant-temperature dehumidification mode when the indoor ambient temperature is determined to be lower than or equal to the heat exchanger's set temperature. By performing this step, the outdoor unit refrigerant temperature of the heat exchanger can be obtained, allowing for the selection of a suitable constant-temperature dehumidification method based on this temperature. This outdoor unit refrigerant temperature can include, for example, the refrigerant temperatures at different locations such as the compressor outlet temperature, the outdoor unit external pipe temperature, and the outdoor heat exchanger outlet temperature.

[0096] In addition, in response to receiving a dehumidification command, if the indoor ambient temperature is higher than the set temperature of the heat exchange device, the cooling dehumidification mode of the heat exchange device can be activated, and dehumidification can be performed based on this cooling dehumidification mode.

[0097] In step S702, based on the outdoor unit refrigerant temperature, the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger is adjusted through the outdoor throttling device and multiple indoor throttling devices.

[0098] The temperature of the refrigerant in the outdoor unit corresponds to the temperature change trend of the refrigerant at the outlet of the heat exchanger tube assembly used for heating. The higher the refrigerant temperature in the outdoor unit, the higher the refrigerant temperature at the outlet of the heat exchanger tube assembly used for heating; conversely, the lower the refrigerant temperature in the outdoor unit, the lower the refrigerant temperature at the outlet of the heat exchanger tube assembly used for heating. If the refrigerant temperature at the outlet of the heat exchanger tube assembly is too low, the subsequent heating mode of the heat exchanger tube assembly may no longer be able to provide heating (i.e., it will not have heating capacity). Even if there is a longer heating section, it will not have heating capacity, so further heating is unnecessary. Therefore, based on the refrigerant temperature of the outdoor unit, the heat exchange mode of at least one heat exchanger tube assembly can be adjusted to achieve constant temperature dehumidification while also improving the heat exchange efficiency of the heat exchange device.

[0099] The heat exchange mode can include a heating mode or a cooling dehumidification mode. The indoor heat exchanger of the heat exchange device includes at least three heat exchange tube groups. By adjusting the heat exchange mode of at least one of the heat exchange tube groups, the indoor heat exchanger can perform constant temperature dehumidification based on different constant temperature dehumidification methods.

[0100] In this step, the constant-temperature dehumidification method of the indoor heat exchanger can be determined based on the outdoor unit refrigerant temperature. Different constant-temperature dehumidification methods have different heating capacities; specifically, the lower the outdoor unit refrigerant temperature, the lower the required heating capacity of the indoor heat exchanger. Based on this constant-temperature dehumidification method, the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger is adjusted through an outdoor throttling device and multiple indoor throttling devices. In one implementation, the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger can be adjusted based on the outdoor unit refrigerant temperature by adjusting the throttling state of the outdoor throttling device and at least one indoor throttling device.

[0101] The throttling device disclosed herein refers to a device in a heat exchanger that "cools and depressurizes" the high-pressure liquid refrigerant (changing it from a high-temperature, high-pressure liquid to a low-temperature, low-pressure mist) and can precisely control the refrigerant flow rate. This throttling device can be, for example, an expansion valve or a capillary tube. It is understood that an indoor throttling device refers to one installed in the indoor unit of an air conditioner, and an outdoor throttling device refers to one installed in the outdoor unit. If the throttling device is in a throttling state, the refrigerant, after passing through the throttling device, can change from a high-temperature, high-pressure liquid to a low-temperature, low-pressure gas. If the throttling device is fully open, it does not have the function of cooling and depressurizing. Therefore, by adjusting the throttling state of the outdoor throttling device and at least one indoor throttling device, the heat exchange mode of at least one heat exchange tube assembly in the indoor heat exchanger can be adjusted.

[0102] In step S703, constant temperature dehumidification is performed based on the heat exchange mode of the adjusted heat exchange tube assembly.

[0103] In this step, when at least one heat exchanger tube group is in cooling and dehumidification mode and at least one heat exchanger tube group is in heating mode, constant temperature dehumidification of the indoor environment where the heat exchanger is located can be achieved.

[0104] Using the above method, based on the multiple indoor throttling devices, the heat exchange mode of at least one heat exchange tube group is adjusted according to the temperature of the outdoor unit refrigerant. This allows for the selection of different constant temperature dehumidification methods based on the different temperatures of the outdoor unit refrigerant, ensuring the constant temperature dehumidification effect while improving the heat exchange efficiency of the heat exchange device.

[0105] The specific implementation method of step S702 will be described below.

[0106] In one possible implementation, when the refrigerant temperature of the outdoor unit is less than or equal to a preset temperature threshold, the outdoor throttling device can be fully opened, the first indoor throttling device and the second indoor throttling device can be throttled, and the third indoor throttling device and the fourth indoor throttling device can be fully opened, so that the first heat exchanger tube group is in heating mode, and the second heat exchanger tube group and at least one third heat exchanger tube group are in cooling and dehumidification mode.

[0107] As mentioned above, the lower the refrigerant temperature of the outdoor unit, the shorter the heating section of the constant temperature dehumidification method can be selected, thereby improving the heat exchange efficiency of the heat exchange device while achieving constant temperature dehumidification effect.

[0108] For example, such as Figure 5 As shown, the three constant temperature dehumidification methods mentioned above are provided. When the outdoor unit refrigerant temperature is determined to be less than or equal to the preset temperature threshold, the constant temperature dehumidification method 1 with the shortest heating section can be selected. Based on this constant temperature dehumidification method 1, the outdoor throttling device 102 can be fully opened, the first indoor throttling device 10121 and the second indoor throttling device 10122 can be throttled, and the third indoor throttling device 10123 and the fourth indoor throttling device 10124 can be fully opened, so that the first heat exchange tube group 10111 is in heating mode, and the second heat exchange tube group 10112 and at least one third heat exchange tube group 10113 are in cooling dehumidification mode.

[0109] like Figure 6 As shown, when the outdoor unit refrigerant temperature is determined to be less than or equal to the preset temperature threshold, in order to achieve constant temperature dehumidification while improving heat exchange efficiency, the constant temperature dehumidification method with the shortest heating section can also be selected, such as... Figure 6As shown, the outdoor throttling device 102 can be fully opened, the two first indoor throttling devices 10121 and the second indoor throttling device 10122 can be throttled, the third indoor throttling device 10123 and the two fourth indoor throttling devices 10124 can be fully opened, so that the first heat exchange tube group 10111 heats, the second heat exchange tube group 10112 cools and dehumidifies, and the two third heat exchange tube groups 10113 cool and dehumidify, so as to provide the shortest heating section for constant temperature dehumidification.

[0110] In another possible implementation, if the temperature difference between the set temperature and the indoor ambient temperature is greater than the preset temperature threshold when the outdoor unit refrigerant temperature is higher than the preset temperature difference threshold, it indicates a strong heating demand during constant temperature dehumidification. Therefore, a constant temperature dehumidification method with relatively strong heating capacity should be selected. For example... Figure 5 As shown, the corresponding constant temperature dehumidification mode 3 has the strongest heating capacity. Therefore, the outdoor throttling device can be fully opened, the first indoor throttling device 10121 can be throttled, and the second indoor throttling device 10122 can be fully opened, so that the first heat exchange tube group 10111 and the second heat exchange tube group 10112 are in heating mode, and the third heat exchange tube group 10113 is in cooling dehumidification mode. This mode is constant temperature dehumidification mode 3.

[0111] Furthermore, while the first heat exchanger tube group 10111 and the second heat exchanger tube group 10112 are in heating mode, and the third heat exchanger tube group 10113 is in cooling and dehumidification mode, this disclosure also requires controlling the third indoor throttling device 10123 to throttle and the fourth indoor throttling device 10124 to be fully open, so as to adjust the liquid refrigerant output from the second heat exchanger tube group 10112 to a low-pressure gaseous refrigerant. This prevents the high-pressure liquid refrigerant at the outlet of the second heat exchanger tube group 10112 from directly mixing with the medium-low pressure gaseous refrigerant at the outlet of the third heat exchanger tube group 10113, which could cause liquid slugging in the compressor and damage the equipment.

[0112] In another implementation, if the outdoor unit refrigerant temperature is greater than a preset temperature threshold, and the temperature difference between the set temperature and the indoor ambient temperature is less than or equal to the preset temperature difference threshold, it indicates a certain heating demand during constant temperature dehumidification. In this case, a constant temperature dehumidification method with relatively moderate heating capacity can be selected. For example... Figure 5 As shown, the heating capacity of the corresponding constant temperature dehumidification mode 2 is in the middle, that is, it can control the outdoor throttling device to be fully open, the first indoor throttling device to be fully open, and the second indoor throttling device to be throttled, so that the first heat exchange tube group and the third heat exchange tube group are in heating mode and the second heat exchange tube group is in cooling dehumidification mode.

[0113] Furthermore, while the first heat exchanger tube group 10111 and the third heat exchanger tube group 10113 are in heating mode, and the second heat exchanger tube group 10112 is in cooling and dehumidification mode, this disclosure also requires controlling the third indoor throttling device 10123 to be fully open and the fourth indoor throttling device 10124 to throttle, so as to adjust the liquid refrigerant output from the third heat exchanger tube group 10113 into a low-pressure gaseous refrigerant. This prevents the high-pressure liquid refrigerant at the outlet of the third heat exchanger tube group 10113 from directly mixing with the medium-low pressure gaseous refrigerant at the outlet of the second heat exchanger tube group 10112, which could cause liquid slugging into the compressor and damage the equipment.

[0114] Figure 8 It is based on Figure 7 The illustrated embodiment shows a flowchart of a control method for a heat exchange device, as shown in the figure. Figure 8 As shown, the method also includes the following steps: In step S704, when the indoor ambient temperature is less than or equal to the set temperature of the heat exchange device, the speed of the outdoor unit fan of the heat exchange device is reduced to the target speed based on the outdoor unit refrigerant temperature and / or temperature difference, wherein the temperature difference is the temperature difference between the set temperature and the indoor ambient temperature.

[0115] In this way, during the execution of step S703, constant temperature dehumidification can be carried out based on the adjusted heat exchange mode and target speed of the heat exchange tube group, so as to improve the constant temperature dehumidification effect and heat exchange efficiency.

[0116] This disclosure allows for the control of a heat exchange device during constant-temperature dehumidification by reducing the outdoor unit fan speed to prevent further decreases in the outdoor unit outlet temperature, which could negatively impact the heating capacity of the indoor heat exchanger's heating section. In other words, a higher outdoor unit fan speed may result in weaker heating capacity of the indoor heat exchanger's heating section. Therefore, this disclosure allows for the determination of a constant-temperature dehumidification method based on the outdoor unit refrigerant temperature and / or temperature difference, and then the determination of the target fan speed according to the heating capacity of the determined constant-temperature dehumidification method.

[0117] For example, as described above, the constant temperature dehumidification method of the heat exchanger can be determined based on the outdoor unit refrigerant temperature and / or temperature difference. It can be one of constant temperature dehumidification method 1, constant temperature dehumidification method 2, or constant temperature dehumidification method 3. The heating capacity of constant temperature dehumidification method 1 is less than that of constant temperature dehumidification method 2, and the heating capacity of constant temperature dehumidification method 2 is less than that of constant temperature dehumidification method 3. Since a higher outdoor unit fan speed may weaken the heating capacity of the indoor heat exchanger's heating section, to avoid the outdoor unit fan speed potentially reducing the indoor unit heat exchanger's heating capacity, the adjusted target speed should be lower for constant temperature dehumidification methods with weaker heating capacity. Therefore, the target speed corresponding to constant temperature dehumidification method 1 is less than that corresponding to constant temperature dehumidification method 2, and the target speed corresponding to constant temperature dehumidification method 2 is less than that corresponding to constant temperature dehumidification method 3. For example, the target speed for constant temperature dehumidification mode 1 can be 300-400 rpm, the target speed for constant temperature dehumidification mode 2 can be 400-500 rpm, and the target speed for constant temperature dehumidification mode 3 can be 500-600 rpm. The above examples are merely illustrative and are not intended to limit the scope of this disclosure.

[0118] The control method of the heat exchange device provided in this disclosure can also, in response to receiving a dehumidification command, perform dehumidification based on the cooling and dehumidification mode of the heat exchange device when the indoor ambient temperature is higher than the set temperature of the heat exchange device.

[0119] If a dehumidification command is received and the indoor ambient temperature is higher than the set temperature of the heat exchange device, it indicates that there is both a dehumidification demand and a cooling demand. Therefore, dehumidification can be performed based on the cooling and dehumidification mode of the heat exchange device.

[0120] In this embodiment, the outdoor throttling device can be controlled to throttle, and multiple indoor throttling devices can be fully opened, so that the refrigerant first passes through the first heat exchange tube group and the second heat exchange tube group with a first diameter for heat exchange, and then passes through the third heat exchange tube group with a second diameter for heat exchange. The first diameter is smaller than the second diameter.

[0121] like Figure 5 As shown, when the outdoor throttling device 102 is throttled and all indoor throttling devices are fully open, the first heat exchanger tube group 10111, the second heat exchanger tube group 10112, and the third heat exchanger tube group 10113 are all in cooling and dehumidifying mode. Therefore, the structure of the indoor heat exchanger involved in this disclosure also supports conventional cooling and dehumidifying mode, thereby meeting the user's conventional cooling and dehumidifying needs.

[0122] In addition, this disclosure can also be based on Figure 1The heat exchange device shown meets the user's basic cooling or heating needs. The control method of the heat exchange device further includes: in response to obtaining a target heat exchange command, controlling the outdoor throttling device to throttle and multiple indoor throttling devices to fully open, so that the heat exchange device executes the heat exchange operation corresponding to the target heat exchange command; wherein, the target heat exchange command includes a cooling command or a heating command.

[0123] like Figure 5 As shown, in response to receiving a cooling command, the refrigerant is throttled by the outdoor throttling device and fully opened by multiple indoor throttling devices, so that the refrigerant first exchanges heat through the first and second heat exchange tube groups with a first diameter, and then exchanges heat through the third heat exchange tube group with a second diameter, where the first diameter is smaller than the second diameter; or, in response to receiving a heating command, the outdoor throttling device is throttled and multiple indoor throttling devices are fully opened, so that the refrigerant first exchanges heat through the third heat exchange tube group with a second diameter, and then exchanges heat through the first heat exchange tube group with a first diameter, where the first diameter is smaller than the second diameter.

[0124] This disclosure also provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the steps of the control method for the heat exchange device provided in this disclosure.

[0125] In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable device, the computer program having a code portion for performing the control method of the heat exchange device described above when executed by the programmable device.

[0126] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented through hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the described functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this application.

[0127] It should be understood that, unless otherwise specifically indicated, features of various embodiments of this disclosure described herein can be combined with each other. As used herein, the term “and / or” includes any one of the relevant listed items and any combination of any two or more; similarly, “at least one of…” includes any one of the relevant listed items and any combination of any two or more.

[0128] It should be understood that, unless otherwise expressly specified and limited, the terms "joining," "attaching," "installing," "connecting," "linking," "fixing," etc., used in the embodiments of this disclosure should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms herein based on the specific circumstances.

[0129] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Rather, these terms are used only to distinguish one component, part, region, layer, or section from another. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section. 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 indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature. In the description herein, “a plurality” means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0130] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0131] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0132] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0133] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

[0134] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A heat exchange device, characterized in that, include: An indoor heat exchanger and an outdoor throttling device, wherein the outdoor throttling device is connected to the inlet of the indoor heat exchanger, and the indoor heat exchanger includes at least three heat exchange tube groups and multiple indoor throttling devices, wherein each indoor throttling device is connected to at least one of the at least three heat exchange tube groups; The plurality of indoor throttling devices are used to adjust the heat exchange mode of at least one of the at least three heat exchange tube groups according to the refrigerant temperature of the outdoor unit of the heat exchange device when the outdoor throttling device is fully open, so as to enable the indoor heat exchanger to perform constant temperature dehumidification.

2. The apparatus according to claim 1, characterized in that, The at least three heat exchange tube groups include a first heat exchange tube group, a second heat exchange tube group, and a third heat exchange tube group; the plurality of indoor throttling devices include a first indoor throttling device and a second indoor throttling device. The outlet of the first heat exchange tube group is connected to the inlet of the third heat exchange tube group through the first indoor throttling device. The second indoor throttling device is connected between the inlet of the first heat exchange tube group and the inlet of the second heat exchange tube group. The inlet of the first heat exchange tube group and the inlet of the second indoor throttling device are also connected to the outdoor throttling device. The outlet of the second heat exchange tube group is connected to the outlet of the third heat exchange tube group.

3. The apparatus according to claim 2, characterized in that, The plurality of indoor throttling devices also includes a third indoor throttling device and a fourth indoor throttling device; The outlet of the second heat exchange tube assembly is connected to the inlet of the third indoor throttling device, the outlet of the third heat exchange tube assembly is connected to the inlet of the fourth indoor throttling device, and the outlet of the third indoor throttling device is connected to the outlet of the fourth indoor throttling device.

4. The apparatus according to claim 3, characterized in that, The third heat exchange tube group includes multiple units, the first indoor throttling device includes multiple units, and the fourth indoor throttling device includes multiple units; The outlet of the first heat exchange tube group is connected to the inlet of a different third heat exchange tube group through different first indoor throttling devices, and the outlet of the different third heat exchange tube groups is connected to the inlet of a different fourth indoor throttling device.

5. The apparatus according to claim 3, characterized in that, The heat exchange device also includes a compressor; The outlets of the third indoor throttling device and the fourth indoor throttling device are connected to the compressor.

6. The apparatus according to any one of claims 2-5, characterized in that, The diameter of the third heat exchange tube group is larger than that of the first heat exchange tube group and the second heat exchange tube group, while the diameters of the first heat exchange tube group and the second heat exchange tube group are the same.

7. The apparatus according to claim 1, characterized in that, The heat exchanger tube assembly includes at least two rows of refrigerant pipes that are parallel to each other.

8. The apparatus according to claim 7, characterized in that, The refrigerant inlet and outlet of the heat exchanger tube assembly are located in different rows.

9. The apparatus according to claim 1, characterized in that, The heat exchange device includes an air conditioner.

10. A control method for a heat exchange device, characterized in that, The method, applied to the heat exchange device of claim 1, comprises: In response to receiving a dehumidification command, when the indoor ambient temperature is less than or equal to the set temperature of the heat exchange device, the outdoor unit refrigerant temperature of the heat exchange device is obtained. Based on the outdoor unit refrigerant temperature, the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger is adjusted through the outdoor throttling device and the plurality of indoor throttling devices. Constant temperature dehumidification is performed based on the heat exchange mode of the adjusted heat exchange tube assembly.

11. The method according to claim 10, characterized in that, The step of adjusting the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger based on the outdoor unit refrigerant temperature, through the outdoor throttling device and the plurality of indoor throttling devices, includes: The constant temperature dehumidification method of the indoor heat exchanger is determined based on the refrigerant temperature of the outdoor unit. Different constant temperature dehumidification methods have different heating capacities. Among them, the lower the refrigerant temperature of the outdoor unit, the smaller the heating capacity required by the indoor heat exchanger. According to the constant temperature dehumidification method, the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger is adjusted by the outdoor throttling device and the plurality of indoor throttling devices.

12. The method according to claim 10, characterized in that, Applied to the heat exchange device according to any one of claims 3-6; The step of adjusting the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger based on the outdoor unit refrigerant temperature, through the outdoor throttling device and the plurality of indoor throttling devices, includes: Based on the outdoor unit refrigerant temperature, the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger is adjusted by adjusting the throttling state of the outdoor throttling device and at least one indoor throttling device.

13. The method according to claim 12, characterized in that, The step of adjusting the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger by adjusting the throttling state of the outdoor throttling device and at least one indoor throttling device based on the outdoor unit refrigerant temperature includes: When the refrigerant temperature of the outdoor unit is less than or equal to a preset temperature threshold, the outdoor throttling device is fully opened, the first indoor throttling device and the second indoor throttling device are throttled, and the third indoor throttling device and the fourth indoor throttling device are fully opened, so that the first heat exchange tube group is in heating mode and the second heat exchange tube group and the at least one third heat exchange tube group are in cooling and dehumidification mode.

14. The method according to claim 12, characterized in that, The step of adjusting the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger by adjusting the throttling state of the outdoor throttling device and at least one indoor throttling device based on the outdoor unit refrigerant temperature includes: If the outdoor unit refrigerant temperature is greater than a preset temperature threshold, and the temperature difference between the set temperature and the indoor ambient temperature is less than or equal to the preset temperature difference threshold, the outdoor throttling device is fully opened, the first indoor throttling device is fully opened, and the second indoor throttling device is throttled, so that the first heat exchange tube group and the third heat exchange tube group are in heating mode and the second heat exchange tube group is in cooling and dehumidification mode.

15. The method according to claim 14, characterized in that, The method further includes: The third indoor throttling device is fully opened, and the fourth indoor throttling device is throttled, so as to adjust the liquid refrigerant output by the third heat exchange tube group into a low-pressure gaseous refrigerant.

16. The method according to claim 12, characterized in that, The step of adjusting the heat exchange mode of at least one heat exchange tube group in the indoor heat exchanger by adjusting the throttling state of the outdoor throttling device and at least one indoor throttling device based on the outdoor unit refrigerant temperature includes: If the outdoor unit refrigerant temperature is greater than a preset temperature threshold, and the temperature difference between the set temperature and the indoor ambient temperature is greater than a preset temperature difference threshold, the outdoor throttling device is fully opened, the first indoor throttling device is throttled, and the second indoor throttling device is fully opened, so that the first heat exchanger tube group and the second heat exchanger tube group are in heating mode, and the third heat exchanger tube group is in cooling and dehumidification mode.

17. The method according to claim 16, characterized in that, The method further includes: The third indoor throttling device is controlled to throttle, and the fourth indoor throttling device is fully opened, so as to adjust the liquid refrigerant output from the second heat exchange tube group into a low-pressure gaseous refrigerant.

18. The method according to claim 10, characterized in that, The method further includes: When the indoor ambient temperature is less than or equal to the set temperature, the speed of the outdoor unit fan of the heat exchange device is reduced to the target speed based on the outdoor unit refrigerant temperature and / or temperature difference, wherein the temperature difference is the temperature difference between the set temperature and the indoor ambient temperature; The constant temperature dehumidification based on the adjusted heat exchanger tube group heat exchange mode includes: Based on the adjusted heat exchange mode of the heat exchange tube assembly and the target rotation speed, constant temperature dehumidification is performed.

19. The method according to claim 10, characterized in that, The method further includes: In response to receiving a dehumidification command, dehumidification is performed based on the cooling and dehumidification mode of the heat exchange device when the indoor ambient temperature is higher than the set temperature.

20. The method according to claim 19, characterized in that, The dehumidification based on the refrigeration and dehumidification mode of the heat exchange device includes: The outdoor throttling device is controlled to throttle, and the multiple indoor throttling devices are fully opened, so that the heat exchange device dehumidifies based on the cooling and dehumidification mode.

21. The method according to claim 10, characterized in that, The method further includes: In response to receiving a target heat exchange command, the outdoor throttling device is controlled to throttle, and the multiple indoor throttling devices are fully opened, so that the heat exchange device performs the heat exchange operation corresponding to the target heat exchange command; The target heat exchange command includes either a cooling command or a heating command.

22. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method according to any one of claims 10-21.

23. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the steps of the method according to any one of claims 10-21.

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