Control method and control device for dual refrigerant air conditioner, and dual refrigerant air conditioner

Abstract

The application relates to the technical field of air conditioner intelligent refrigeration, and discloses a control method for a double-refrigeration air conditioner. The control method comprises the following steps: in the case that a refrigerant heat exchange system operates in a refrigerant refrigeration mode, controlling an adsorption refrigeration system to enter a desorption cold storage mode; obtaining a first temperature of an evaporation part; and if the first temperature of the evaporation part is greater than or equal to a set temperature threshold, controlling the desorption cold storage mode to be exited. The control method can control the exit of the desorption cold storage mode according to the temperature of the evaporation part of the adsorption refrigeration system, wherein the heat source for the desorption cold storage of the adsorption refrigeration system is the heat discharged by an outdoor heat exchanger when the refrigerant heat exchange system refrigerates, so that the desorption process of the adsorption refrigeration can be realized without configuring an additional heat source, the product structure of the combined air conditioner is simplified, and the air conditioning system performance is effectively improved. The application further discloses a control device for the double-refrigeration air conditioner and the double-refrigeration air conditioner.

Description

Technical Field

[0001] This application relates to the field of intelligent air conditioning technology, for example to a control method, control device and dual-cooling air conditioner. Background Technology

[0002] With the advancement of science and technology in the world today, the structural design and cooling performance of air conditioners have also made great progress. Based on their cooling principles, current air conditioners can be mainly divided into the following types:

[0003] (1) Refrigerant refrigeration utilizes the principle of heat absorption or release during the gas-liquid two-state change of refrigerant to expel indoor heat to the outdoor environment.

[0004] (2) Adsorption refrigeration, which utilizes the principle that the refrigerant releases and absorbs heat during the adsorption and desorption processes of the adsorbent to achieve the transfer of indoor heat.

[0005] (3) Steam jet refrigeration, which relies on the suction effect of the steam jet to make the refrigerant evaporate in the vacuum environment generated by the suction to achieve the purpose of refrigeration.

[0006] (4) Thermoelectric refrigeration, which uses the reverse reaction of the Seebeck effect—the Peltier effect—to achieve the purpose of refrigeration. The most common thermoelectric refrigeration method is semiconductor refrigeration.

[0007] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0008] Among the aforementioned refrigeration technologies, refrigerant refrigeration and adsorption refrigeration employ different refrigeration structure designs to achieve refrigeration operations, each with its own advantages and disadvantages. Current air conditioning products generally only use one of these refrigeration structure designs, relying on a single refrigeration technology for cooling. Therefore, how to apply these two refrigeration technologies to the same air conditioner and effectively improve its performance represents a completely new approach to air conditioning product design. Summary of the Invention

[0009] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0010] This disclosure provides a control method, control device, and dual-cooling air conditioner to solve the technical problem that the prior art does not utilize both refrigerant refrigeration and adsorption refrigeration technologies to achieve air conditioning refrigeration.

[0011] In some embodiments, the control method for a dual-cooling air conditioner includes:

[0012] When the refrigerant heat exchange system is operating in refrigerant cooling mode, control the adsorption refrigeration system to enter desorption cold storage mode;

[0013] Obtain the first temperature of the evaporator;

[0014] If the first temperature of the evaporator is greater than or equal to the set temperature threshold, the system will exit the desorption and cold storage mode.

[0015] In some embodiments, the control device for a dual-cooling air conditioner includes:

[0016] The processor and the memory storing program instructions are configured to, when executing the program instructions, perform a control method for a dual-cooling air conditioner as described in some of the preceding embodiments.

[0017] In some embodiments, a dual-cooling air conditioner includes:

[0018] The refrigerant heat exchange system mainly includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, and a throttling device;

[0019] One or more adsorption refrigeration systems, each adsorption refrigeration system comprising:

[0020] Evaporator section, located at the indoor heat exchanger of the refrigerant heat exchange system;

[0021] The adsorption section is located at the outdoor heat exchanger of the refrigerant heat exchange system, and an adsorption medium transport flow path is constructed between the adsorption section and the evaporation section.

[0022] Control devices for dual-cooling air conditioners, as described in some of the embodiments above.

[0023] The control method, apparatus, and dual-cooling air conditioner provided in this disclosure can achieve the following technical effects:

[0024] The control method for a dual-cooling air conditioner provided in this disclosure can control the exit of the desorption cold storage mode based on the temperature of the evaporator of the adsorption refrigeration system. The heat source for the desorption cold storage in the adsorption refrigeration system is the heat discharged by the outdoor heat exchanger during the cooling process of the refrigerant heat exchange system. Therefore, the desorption process of adsorption refrigeration can be achieved without configuring an additional heat source. The method can also determine whether the desorption cold storage process has been completed based on the temperature of the evaporator, thus achieving precise control of the desorption cold storage process during the cooling process of the refrigerant heat exchange system. Therefore, this disclosure does not simply superimpose two refrigeration systems into the same air conditioner. Instead, it cleverly combines two refrigeration structures and the two processes of refrigerant refrigeration and desorption cold storage by fully considering the refrigeration principles of both systems. This not only simplifies the product structure of the combined air conditioner but also effectively improves the overall performance of the air conditioner.

[0025] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0026] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0027] Figure 1 This is a schematic diagram of the structure of a dual-cooling air conditioner provided in an embodiment of this disclosure;

[0028] Figure 2 This is a schematic flowchart of a control method for a dual-cooling air conditioner provided in an embodiment of this disclosure;

[0029] Figure 3 This is a schematic diagram of the structure of the control device for a dual-cooling air conditioner provided in an embodiment of this disclosure. Detailed Implementation

[0030] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0031] Figure 1 This is a schematic diagram of the structure of a dual-cooling air conditioner provided in an embodiment of this disclosure.

[0032] like Figure 1 As shown in the illustration, this disclosure provides a dual-cooling air conditioner, including a refrigerant heat exchange system and an adsorption refrigeration system. The refrigerant heat exchange system can be a single-cooling refrigerant heat exchange system, which can be used for cooling, dehumidifying, and other functions of the indoor environment, or it can be a cooling-heating refrigerant heat exchange system, which can be used for cooling, dehumidifying, and heating functions of the indoor environment. The adsorption refrigeration system can be used to cool the indoor environment when operating in adsorption refrigeration mode.

[0033] In some optional embodiments, taking a cooling and heating refrigerant heat exchange system as an example, the refrigerant heat exchange system mainly includes components such as an indoor heat exchanger 11, an outdoor heat exchanger 12, a compressor 13, and a throttling device 14; the indoor heat exchanger 11, the outdoor heat exchanger 12, the throttling device 14, and the compressor 13 are connected by refrigerant pipelines to form a refrigerant circulation loop, and the refrigerant flows along the flow direction set by different operating modes through the refrigerant circulation loop to realize its different operating mode functions.

[0034] Here, the dual-cooling air conditioner includes an indoor unit and an outdoor unit. The indoor heat exchanger is located in the indoor unit, which is also equipped with an indoor fan for driving indoor air to exchange heat with the indoor heat exchanger 11. The outdoor heat exchanger 12 and compressor 13 are located in the outdoor unit, which is also equipped with an outdoor fan for outdoor air to exchange heat with the outdoor heat exchanger 12. The outdoor heat exchanger 12 is located on the air inlet side of the outdoor fan.

[0035] In the embodiments, the operating modes of the refrigerant heat exchange system of the dual-cooling air conditioner include refrigerant cooling mode, refrigerant dehumidification mode, and refrigerant heating mode. The refrigerant cooling mode is generally used in high-temperature conditions in summer to reduce the indoor ambient temperature; the refrigerant dehumidification mode is also generally used in high-temperature and high-humidity conditions in summer to reduce the indoor ambient humidity; and the refrigerant heating mode is generally used in low-temperature conditions in winter to increase the indoor ambient temperature.

[0036] When the refrigerant heat exchange system operates in refrigerant cooling mode, the refrigerant flow direction is set so that the high-temperature refrigerant discharged from the compressor 13 first flows through the outdoor heat exchanger 12 to exchange heat with the outdoor environment, then flows into the indoor heat exchanger 11 to exchange heat with the indoor environment, and finally the refrigerant flows back to the compressor 13 to perform compression operation again. During this process, the refrigerant flowing through the outdoor heat exchanger 12 releases heat to the outdoor environment, and the refrigerant flowing through the indoor heat exchanger 11 absorbs heat from the indoor environment. Through the circulation of the refrigerant in the refrigerant circulation loop, the heat in the room can be continuously discharged to the outdoor environment, thereby achieving the purpose of cooling the indoor environment by reducing the temperature.

[0037] When the refrigerant heat exchange system operates in refrigerant dehumidification mode, the refrigerant flow direction is the same as that in refrigerant cooling mode. The difference is that when the air conditioner operates in refrigerant dehumidification mode, by adjusting some operating parameters, such as reducing the flow opening of the throttling device 14, the temperature and pressure of the refrigerant flowing into the indoor heat exchanger 11 can be lower. This allows the indoor heat exchanger 11 to reach a lower temperature as the refrigerant absorbs heat and evaporates. Thus, when the surface temperature of the indoor heat exchanger 11 is lower than the dew point temperature of the current operating condition, the water vapor in the indoor air flowing through the indoor heat exchanger 11 can condense on the indoor heat exchanger 11, thereby achieving the purpose of reducing indoor air humidity.

[0038] When operating in refrigerant heating mode, the refrigerant flow direction is set so that the high-temperature refrigerant discharged from the compressor 13 first flows through the indoor heat exchanger 11 to exchange heat with the outdoor environment, then flows into the outdoor heat exchanger 12 to exchange heat with the indoor environment, and finally the refrigerant flows back to the compressor 13 to perform the compression operation again. During this process, the refrigerant flowing through the indoor heat exchanger 11 releases heat to the indoor environment, and the refrigerant flowing through the outdoor heat exchanger 12 absorbs heat from the outdoor environment. Through the circulation of the refrigerant in the refrigerant circulation loop, the outdoor heat can be continuously released into the indoor environment, thereby achieving the purpose of raising the indoor temperature.

[0039] In some optional embodiments, the various components of the refrigerant heat exchange system are assembled and connected using existing connection structures for refrigerant heat exchange systems, which will not be elaborated here.

[0040] In some alternative embodiments, the dual-cooling air conditioner may be equipped with only one adsorption refrigeration system, or it may be equipped with a group of adsorption refrigeration systems, which may include two or more adsorption refrigeration systems.

[0041] Taking one of the adsorption refrigeration systems as an example, the adsorption refrigeration system includes an adsorption section 21 and an evaporation section 22. The adsorption section 21 is located at the outdoor heat exchanger 12 of the refrigerant heat exchange system. It is filled with an adsorbent, which is used to absorb heat and release the adsorbent medium after desorption and cold storage stage, and to adsorb the adsorbent medium and release heat during the adsorption refrigeration stage. The evaporation section 22 is located on the indoor side. It is used to store the liquid adsorbent medium from the adsorption section 21 during the desorption and cold storage stage, and to absorb heat from the indoor environment and transport the vaporized adsorbent medium to the adsorption section 21 during the adsorption refrigeration stage.

[0042] In some embodiments, the adsorption section 21 is disposed between the outdoor fan and the outdoor heat exchanger 12. Here, since the outdoor heat exchanger 12 is disposed on the air inlet side of the outdoor fan, the heat dissipated by the outdoor heat exchanger 12 can first flow through the adsorption section 21 sandwiched between the outdoor fan and the outdoor heat exchanger 12 under the driving action of the outdoor fan, so that the adsorption section 21 can absorb a large amount of heat for desorption and cold storage during the desorption and cold storage stage; at the same time, the adsorption section 21 is also located on the air inlet side of the outdoor fan, so the heat released by the adsorption section 21 can also be dissipated to the outdoor environment by the driving action of the outdoor fan during the adsorption and cooling stage.

[0043] Optionally, the outdoor heat exchanger 12 has a plate-like structure, and its cross-sectional profile is in the form of semi-enclosing the outdoor fan. Therefore, in order to improve the heat exchange effect between the adsorption section 21 and the outdoor heat exchanger 12, in this embodiment, the overall shape of the adsorption section 21 is adapted to the outdoor heat exchanger 12, and it is also designed to semi-enclose the outdoor fan and fits the outdoor heat exchanger 12, thereby effectively increasing the heat exchange area between the adsorption section 21 and the outdoor heat exchanger 12 and improving the waste heat utilization efficiency of the outdoor heat exchanger 12.

[0044] Here, for the adsorption refrigeration system group, in order to ensure that the adsorption parts 21 of multiple adsorption refrigeration systems can absorb heat from the outdoor heat exchanger 12 evenly and to avoid the situation where the adsorption parts 21 of individual adsorption refrigeration systems deviate from the outdoor heat exchanger 12 and thus absorb too little heat, the adsorption parts 21 of multiple adsorption refrigeration systems in the adsorption refrigeration system group are arranged side by side. Optionally, the adsorption parts 21 of multiple adsorption refrigeration systems are arranged side by side along the transverse or longitudinal direction of the outdoor heat exchanger 12. The adsorption parts 21 are designed with a shape that matches the corresponding part of the outdoor heat exchanger 12 to ensure the heat exchange efficiency of both.

[0045] Optionally, an adsorption medium transport path is also constructed between adjacent adsorption sections 21; in this way, during the desorption and adsorption cooling stages, the gaseous adsorption medium can flow between multiple adsorption sections 21, thereby improving the overall desorption and cooling effect and the adsorption cooling effect of the adsorption refrigeration system.

[0046] Optionally, the evaporation section 22 has a plate-fin structure. The plate-fin structure can effectively improve the heat exchange effect between the adsorption medium in the evaporation section 22 and the indoor environment during the desorption and cold storage stage, thereby enhancing the heat absorption and cooling capacity. At the same time, a flow path for the adsorption medium is formed inside the evaporation section 22, and the flow path of the adsorption medium is connected to the adsorption medium transport flow path.

[0047] In some optional embodiments, the indoor heat exchanger 11 has a longitudinal section with a zigzag shape and a semi-encircling structure around the indoor fan. Therefore, in order to improve the heat exchange effect between the evaporator 22 and the indoor environment, in this embodiment, the overall shape of the evaporator 22 is adapted to the indoor heat exchanger 11 and is also designed to semi-encircle the indoor fan and is set close to the indoor heat exchanger 11 to increase the heat exchange area between the evaporator 22 and the airflow flowing through the indoor unit and improve the heat absorption and cooling capacity.

[0048] Here, for the adsorption refrigeration system group, in order to enable the evaporation sections 22 of the multiple adsorption refrigeration systems to absorb heat from the indoor environment evenly, the evaporation sections 22 of the multiple adsorption refrigeration systems are also arranged in a side-by-side manner; optionally, the evaporation sections 22 of the multiple adsorption refrigeration systems are arranged in a side-by-side along the transverse or longitudinal direction of the indoor heat exchanger 11, and the evaporation section 22 is designed to be adapted to the corresponding part of the indoor heat exchanger 11.

[0049] Optionally, an adsorption medium transport path is also constructed between adjacent evaporation sections 22; in this way, during the desorption and adsorption cold storage stages, liquid and gaseous adsorption media can flow between multiple evaporation sections 22, thereby improving the overall desorption and cold storage effect and adsorption refrigeration effect of the adsorption refrigeration system.

[0050] In addition, the adsorption refrigeration system also includes an intermediate heat dissipation section 23; wherein, the intermediate heat dissipation section 23 is disposed on the adsorption medium conveying flow path, and can be used to receive the gaseous adsorption medium conveyed by the adsorption section 21 during the desorption and cold storage stage and dissipate heat and condense it so that at least part of the gaseous adsorption medium is liquefied, and the liquefied adsorption medium is further conveyed to the evaporation section 22 for storage.

[0051] Here, the intermediate heat dissipation section 23 is located on the outdoor side, which achieves heat dissipation and condensation of the adsorbent medium through heat exchange with the outdoor environment. When the refrigerant heat exchange system is running in refrigerant cooling mode, the outdoor heat exchanger 12 discharges heat to the outside. Due to its temperature, the temperature of the adsorption section 21 is generally higher than the outdoor ambient temperature. Therefore, after the gaseous adsorbent medium released by the adsorption section 21 under the influence of high temperature heat flows into the intermediate heat dissipation section 23, the heat is dissipated to the outdoor environment, thereby causing at least part of the gaseous adsorbent medium to recondense into a liquid state.

[0052] Optionally, the middle heat dissipation section 23 is a horizontal flow heat sink.

[0053] In some embodiments, the intermediate heat dissipation section 23 is located on the back panel, side panel, or bottom plate of the outdoor unit of the refrigerant heat exchange system, and is located away from the air outlet of the outdoor unit, so as to avoid the high-temperature air discharged from the outdoor unit from affecting the heat dissipation effect of the intermediate heat dissipation section 23.

[0054] Preferably, the intermediate heat dissipation section 23 is located at the bottom plate. In this configuration, the outdoor unit can shield the intermediate heat dissipation section 23 from sunlight, thereby providing a more suitable heat dissipation temperature environment for the intermediate heat dissipation section 23.

[0055] Alternatively, since the outdoor unit's back panel has an air inlet, the middle heat dissipation section 23 can also be located near the air inlet, thereby utilizing the driving action of the outdoor fan to accelerate the flow of air around the middle heat dissipation section 23, thus improving the heat dissipation effect.

[0056] In this embodiment, an adsorption medium transport flow path is constructed between the adsorption section 21 and the evaporation section 22, and the adsorption medium can flow between the adsorption section 21, the intermediate heat dissipation section 23 and the evaporation section 22 via the adsorption medium transport flow path.

[0057] Here, the adsorption medium transport path includes a desorption path and an adsorption path. The desorption path is used for transporting the adsorption medium during the desorption and cold storage stage, and the adsorption path is used for transporting the adsorption medium during the adsorption and cold storage stage.

[0058] In the desorption flow path, the adsorption section 21, the intermediate heat dissipation section 23 and the evaporation section 22 are connected in series, so that after the adsorption medium flows out of the adsorption section 21 during the desorption and cold storage stage, it enters the intermediate heat dissipation section 23 and the evaporation section 22 in sequence, and is finally stored in the evaporation section 22 in liquid form.

[0059] Optionally, a one-way valve is provided in the desorption flow path, which limits the adsorption medium to be transported only in the direction of "adsorption section 21 → intermediate heat dissipation section 23 → evaporation section 22". Here, the one-way valve can be provided in the flow path between the adsorption section 21 and the intermediate heat dissipation section 23, or it can be provided in the flow path between the intermediate heat dissipation section 23 and the evaporation section 22.

[0060] In the adsorption flow path, the evaporation section 22 and the adsorption section 21 are connected in series, so that after the adsorption medium flows out of the evaporation section 22 during the adsorption cooling stage, it enters the adsorption section 21 through the adsorption flow path and is re-adsorbed by the adsorbent in the adsorption section 21.

[0061] Optionally, a one-way valve is provided in the adsorption flow path, which limits the adsorption medium to be transported only in the direction of "evaporation section 22 → adsorption section 21".

[0062] Optionally, the desorption flow path can be set as the main flow path, and the adsorption flow path can be set in parallel with the intermediate heat dissipation section 23. Therefore, the non-parallel flow path section of the desorption flow path near the adsorption section 21 can also be used for the transport of the adsorption medium during the adsorption cooling stage.

[0063] In this embodiment, the adsorption refrigeration system further includes a control valve 24, which is disposed on the adsorption medium conveying flow path and used to control the on / off state and flow rate of the adsorption medium conveying flow path. Here, the control valve 24 is disposed on the non-parallel flow path section near the adsorption section 21 in the above embodiment of the desorption flow path, so that the flow rate control of both the desorption cold storage and adsorption refrigeration stages can be achieved by using only this one control valve 24.

[0064] Alternatively, a control valve 24 can be placed in the desorption flow path and the adsorption flow path respectively, so as to control the on / off state and flow rate of the corresponding flow path through the respective control valve 24.

[0065] The following describes the cooperative operation of the adsorption refrigeration system and the refrigerant heat exchange system in the embodiments of this disclosure:

[0066] In this embodiment, the operating modes of the adsorption refrigeration system mainly include desorption cold storage mode and adsorption refrigeration mode. The desorption cold storage mode corresponds to the desorption cold storage stage in the previous embodiment, which is mainly used to accumulate "cold energy". The adsorption refrigeration mode corresponds to the adsorption refrigeration stage in the previous embodiment, which is mainly used to release the "cold energy" accumulated in the desorption cold storage stage, thereby achieving cooling of the indoor side where it is located.

[0067] Here, the adsorption refrigeration system operates in desorption cold storage mode under the premise that the refrigerant heat exchange system is operating in refrigerant refrigeration mode or refrigerant dehumidification mode. Here, when the refrigerant heat exchange system is operating in refrigerant refrigeration mode, the outdoor heat exchanger 12 releases heat. After the heat is transferred to the adsorption section 21, the adsorbent medium adsorbed by the adsorbent in the adsorption section 21 absorbs heat and desorbs into a gaseous adsorbent medium. Then, it enters the intermediate heat dissipation section 23 through the desorption flow path for condensation. The liquid adsorbent medium obtained by condensation enters the evaporation section 22 as the stored "cold energy".

[0068] The adsorption refrigeration system operates in adsorption refrigeration mode under the premise that the refrigerant heat exchange system is not in refrigerant refrigeration mode or refrigerant dehumidification mode. Here, when the refrigerant heat exchange system is not in refrigerant refrigeration mode or refrigerant dehumidification mode, the outdoor heat exchanger 12 stops working and does not release heat to the outside. Therefore, the temperature of the adsorption section 21 is lower than when the outdoor heat exchanger 12 releases heat, so that the adsorbent in the adsorption section 21 begins to re-adsorb the adsorbent medium. Under the combined influence of various factors such as the concentration of the adsorbent medium, pressure and indoor ambient temperature, the liquid adsorbent medium in the evaporation section 22 begins to absorb heat and evaporate into a gaseous adsorbent medium, and flows back to the adsorption section 21 through the adsorption flow path. In this process, the adsorbent medium absorbs heat from the indoor environment, and after the adsorbent medium is re-adsorbed by the adsorbent, it releases heat to the outdoor environment where the adsorption section 21 is located. Therefore, by the adsorption medium flow that is the reverse of the desorption and cold storage stage, adsorption refrigeration and cooling of the indoor environment can be achieved.

[0069] Figure 2 This is a schematic flowchart of a control method for a dual-cooling air conditioner provided in an embodiment of this disclosure.

[0070] like Figure 2 As shown in the embodiments of this disclosure, a control method for a dual-cooling air conditioner is provided. Optionally, this control method can be applied to, for example... Figure 1 The dual-cooling air conditioner shown in the embodiment; this control method can be used to solve the problem in the prior art that it does not utilize both refrigerant refrigeration and adsorption refrigeration technologies to achieve air conditioning cooling; in the embodiment, the main process steps of the control method include:

[0071] S201. When the refrigerant heat exchange system is operating in refrigerant refrigeration mode, control the adsorption refrigeration system to enter desorption cold storage mode.

[0072] In some optional embodiments, when the dual-cooling air conditioner is turned on during high-temperature summer conditions, its default start-up mode is that the refrigerant heat exchange system operates in refrigerant cooling mode. During this process, the indoor heat exchanger of the refrigerant heat exchange system begins to absorb heat from the indoor environment to reduce the indoor temperature. At the same time, the heat absorbed by the indoor heat exchanger is transported to the outdoor heat exchanger along with the refrigerant, and the heat is discharged to the outdoor environment through the heat exchange process between the outdoor heat exchanger and the outdoor environment. At this time, the temperature of the outdoor heat exchanger is higher than the temperature of the outdoor environment.

[0073] In step S201, when the refrigerant heat exchange system is operating in refrigerant refrigeration mode, the adsorption refrigeration system is controlled to enter desorption cold storage mode. The outdoor heat exchanger discharges heat, causing the ambient temperature around it to rise. Therefore, the adsorption medium in the adsorption section of the adsorption refrigeration system located near the outdoor heat exchanger absorbs heat and detaches from the adsorbent, achieving "desorption". The desorbed adsorption medium flows to the intermediate heat exchange section along the adsorption medium transport path. Here, the temperature of the intermediate heat exchange section is lower than the temperature of the outdoor heat exchanger. Therefore, the adsorption medium releases heat and condenses, and continues to flow into the evaporation section on the indoor side along the adsorption medium transport path, achieving "cold storage".

[0074] Optionally, the operation of controlling the adsorption refrigeration system to enter the desorption cold storage mode in step S201 includes: controlling the opening of the control valve set on the adsorption medium conveying flow path to open the flow path of the adsorption medium from the adsorption section to the evaporation section.

[0075] As the desorption cooling mode continues to operate, the adsorption medium in the adsorption section decreases, while the adsorption medium in the evaporation section increases, so that the evaporation section stores the cooling capacity for the adsorption cooling mode.

[0076] S202, Obtain the first temperature of the evaporator;

[0077] Optionally, the first temperature of the evaporation section can be the temperature of the outer shell of the evaporation section or the temperature of the adsorption medium inside the evaporation section.

[0078] Here, the adsorption refrigeration system has a temperature sensor installed on the outer shell of its evaporator section. This temperature sensor can be used to detect the real-time temperature of the outer shell of the evaporator section. Therefore, the first temperature of the evaporator section can be obtained from the temperature data detected by this temperature sensor. Alternatively, another temperature sensor can be installed inside the evaporator section. This temperature sensor can be used to detect the real-time temperature of the adsorption medium inside the evaporator section. Therefore, the first temperature of the evaporator section can also be obtained from the temperature data detected by this temperature sensor.

[0079] S203. If the first temperature of the evaporator is greater than or equal to the set temperature threshold, the control will exit the desorption and cold storage mode.

[0080] In this embodiment of the disclosure, during the desorption cold storage mode, the amount of adsorbed medium in the evaporation section gradually increases and the pressure increases. At the same time, affected by the residual heat after the adsorbed medium in the intermediate heat dissipation section condenses, the temperature of the evaporation section shows a slow upward trend from a low temperature starting point. Therefore, by judging the first temperature change of the evaporation section, the change in the amount of adsorbed medium accumulated in the evaporation section can be obtained, and then it can be judged whether the adsorption refrigeration system has accumulated enough "cold energy" and whether the desorption cold storage has been completed.

[0081] Optionally, a temperature threshold can be set as a critical temperature value calculated in advance through experiments, used to characterize the cooling capacity of the adsorption refrigeration system. When the first temperature of the evaporator is greater than or equal to the set temperature threshold, it indicates that there is enough liquid adsorbent in the evaporator of the adsorption refrigeration system and the cooling capacity is high, which can achieve a good cooling effect on the indoor environment. Therefore, the desorption cold storage mode can be exited, so that the adsorption refrigeration mode can be used to cool the indoor environment at any time. Conversely, it indicates that there is still less liquid adsorbent in the evaporator of the adsorption refrigeration system and the cooling capacity is low. The desorption cold storage mode needs to be operated continuously to continue to accumulate "cold energy". In this way, the desorption cold storage mode of the adsorption refrigeration system can be precisely controlled by judging the temperature of the evaporator.

[0082] In the above-mentioned optional embodiments, the operation of controlling the exit from the desorption cold storage mode includes controlling the closing of the control valve to block the adsorption medium delivery path where the control valve is located.

[0083] In some optional embodiments, the set temperature threshold is determined based on the outdoor ambient temperature. In this embodiment, the intermediate heat dissipation section is located on the outdoor side, and the adsorption medium condenses after heat exchange with the outdoor ambient temperature. Therefore, the temperature change of the evaporation section is affected by the outdoor ambient temperature, and the temperature of the evaporation section when desorption and cold storage are completed varies under different outdoor ambient temperatures. Therefore, in this embodiment, the set temperature threshold for controlling the exit of the desorption and cold storage mode is determined by the outdoor ambient temperature, so that the exit judgment of the desorption and cold storage mode can be adapted to the current outdoor operating conditions, thereby improving the accuracy of control.

[0084] Therefore, before the air conditioner leaves the factory, the temperature of the evaporator when the desorption and cold storage of the adsorption refrigeration system is completed under different outdoor ambient temperature conditions can be measured through experiments and similar methods. This temperature can be used as the set temperature threshold, and then the correlation between the outdoor ambient temperature and the set temperature threshold can be established. This correlation can be stored in the control module of the dual-cooling air conditioner.

[0085] Therefore, in this embodiment of the disclosure, determining the set temperature threshold based on the outdoor ambient temperature includes: obtaining the corresponding set temperature threshold from a preset first association relationship based on the outdoor ambient temperature.

[0086] The first association relationship includes a one-to-one correspondence between outdoor ambient temperature and set temperature threshold. For example, in the first association relationship, the set temperature threshold corresponding to an outdoor ambient temperature of 30℃ is 'a', and the set temperature threshold corresponding to an outdoor ambient temperature of 36℃ is 'b'.

[0087] Here, in the first correlation, the outdoor ambient temperature and the set temperature threshold are positively correlated. That is, the higher the outdoor ambient temperature, the higher the temperature that the evaporator can reach when the desorption and cold storage mode is completed, and therefore the set temperature threshold is also a higher value.

[0088] In this embodiment of the present disclosure, the outdoor unit of the dual-cooling air conditioner is also equipped with a temperature sensor, which can be used to detect the real-time temperature of the outdoor environment on the outdoor side; therefore, before performing the above step S202, the outdoor environment temperature detected by the temperature sensor can be obtained first, and a set temperature threshold can be determined based on the outdoor environment temperature.

[0089] The control method for a dual-cooling air conditioner provided in this disclosure can control the exit of the desorption cold storage mode based on the temperature of the evaporator of the adsorption refrigeration system. The heat source for the desorption cold storage in the adsorption refrigeration system is the heat discharged by the outdoor heat exchanger during the cooling process of the refrigerant heat exchange system. Therefore, the desorption process of adsorption refrigeration can be achieved without configuring an additional heat source. The method can also determine whether the desorption cold storage process has been completed based on the temperature of the evaporator, thus achieving precise control of the desorption cold storage process during the cooling process of the refrigerant heat exchange system. Therefore, this disclosure does not simply superimpose two refrigeration systems into the same air conditioner. Instead, it cleverly combines two refrigeration structures and the two processes of refrigerant refrigeration and desorption cold storage by fully considering the refrigeration principles of both systems. This not only simplifies the product structure of the combined air conditioner but also effectively improves the overall performance of the air conditioner.

[0090] In some optional embodiments, the steps of the control method for a dual-cooling air conditioner disclosed herein further include: determining that the running time of the desorption and cold storage mode meets a set duration condition before controlling the exit of the desorption and cold storage mode.

[0091] Optionally, the duration conditions include: the runtime of the desorption cold storage mode is greater than or equal to the duration threshold.

[0092] Here, the duration of the desorption cold storage mode directly affects the amount of liquid adsorbent medium in the evaporation section, and thus the cooling duration and cooling capacity when the adsorption refrigeration system operates in adsorption refrigeration mode. In this embodiment, the duration threshold is used to characterize the time required for the desorption cold storage mode to accumulate the minimum amount of liquid adsorbent medium, and this minimum amount of liquid adsorbent medium is the amount of adsorbent medium required for the adsorption refrigeration system to achieve the shortest duration and lowest cooling capacity in adsorption refrigeration mode.

[0093] Here, the minimum duration requirement can be the duration for which the adsorption refrigeration mode of the adsorption refrigeration system can maintain operation, such as 5 minutes, etc.; the minimum cooling capacity can be the minimum rate of temperature reduction of the indoor temperature when the adsorption refrigeration mode is running, such as 1℃ / 5min, etc.

[0094] In this way, by ensuring that the running time of the desorption cold storage mode is greater than or equal to the duration threshold before exiting the desorption cold storage mode, the normal operation of the refrigeration work can be guaranteed if the adsorption refrigeration mode is subsequently activated.

[0095] Optionally, if it is determined that the running time of the desorption cold storage mode is less than the set time threshold, the desorption cold storage mode is kept running until the running time of the desorption cold storage mode is greater than or equal to the set time threshold.

[0096] Optionally, in this embodiment, the duration threshold ranges from 8 min to 12 min.

[0097] Optionally, the dual-cooling air conditioner also includes a timing module. The timing module can be used to record the running time of the adsorption refrigeration system of the dual-cooling air conditioner in the desorption cold storage mode. Therefore, in this embodiment, the running time of the desorption cold storage mode can be obtained through the timing module. Here, the running time is the duration of a single operation of the desorption cold storage mode by the adsorption refrigeration system.

[0098] In addition to determining whether desorption and cold storage are complete based on the temperature of the evaporator in the aforementioned embodiments, it can also be determined by the amount of adsorption medium evaporated; in some optional embodiments, the steps of the control method for dual-cooling air conditioners disclosed herein further include: detecting the amount of adsorption medium in the evaporator before controlling the exit of the desorption and cold storage mode; and determining that the amount of adsorption medium in the evaporator meets the set medium amount condition.

[0099] Optionally, the medium quantity condition can be set to include: the amount of adsorbent medium in the evaporation section is greater than or equal to the set medium quantity threshold.

[0100] In this embodiment, the adsorption medium in the evaporation section exists in liquid form. Therefore, the change in the remaining amount of adsorption medium can also be reflected by the liquid level. This disclosure provides a liquid level sensor in the evaporation section. The liquid level sensor can be used to detect the change in the liquid level of the liquid adsorption medium in the evaporation section, and then determine the amount of adsorption medium in the evaporation section by the change in the liquid level.

[0101] In this embodiment of the disclosure, when the amount of adsorbent medium meets the set medium amount condition, it can be determined that the amount of adsorbent medium stored in the evaporation section is large, indicating that the cooling capacity of the adsorption refrigeration system has also become stronger and can ensure the cooling effect on the indoor environment when the adsorption refrigeration mode is activated. Therefore, the desorption cold storage mode is also controlled to exit.

[0102] In some optional embodiments, the steps of the control method for a dual-cooling air conditioner disclosed herein further include: controlling the outdoor fan to run at a first speed when the adsorption refrigeration system enters the desorption cold storage mode; and controlling the outdoor fan to run at a second speed when the adsorption refrigeration system exits the desorption cold storage mode.

[0103] In this embodiment, the first rotational speed is less than the second rotational speed. Here, when the adsorption refrigeration system enters the desorption cold storage mode, it primarily utilizes the heat from the outdoor heat exchanger of the refrigerant heat exchange system to desorb the adsorbent medium in the adsorption section. Therefore, controlling the outdoor fan to operate at a lower first rotational speed reduces the amount of heat dissipated into the outdoor environment, allowing the heat to concentrate around the adsorption section and thus increasing the desorption rate. Conversely, when the adsorption refrigeration system exits the desorption cold storage mode, the outdoor fan is controlled to operate at a higher second rotational speed to improve the heat dissipation effect of the outdoor heat exchanger, thereby enhancing the cooling effect of the refrigerant heat exchange system. In this dual-cooling air conditioner, the outdoor fan speed is flexibly adjusted according to the start / stop status of the desorption cold storage mode of the adsorption refrigeration system, which improves both the desorption effect and the cooling effect of the refrigerant heat exchange system.

[0104] For example, when the adsorption refrigeration system enters the desorption cold storage mode, the first speed of the outdoor fan is 400 r / min; while when the adsorption refrigeration system exits the desorption cold storage mode, the second speed of the outdoor fan is 600 r / min.

[0105] In some optional embodiments, after controlling the adsorption refrigeration system to exit the desorption storage mode, if the triggering conditions for the adsorption refrigeration mode are met, the adsorption refrigeration system is controlled to enter the adsorption refrigeration mode.

[0106] In this way, the "cold energy" accumulated during the desorption and cold storage phase of the adsorption refrigeration system can be used to cool the indoor environment. The adsorption refrigeration phase utilizes the adsorbent to adsorb the adsorption medium, transferring heat from the indoor side to the outdoor side, thus requiring no energy consumption. By combining adsorption refrigeration and refrigerant refrigeration, the power consumption required to maintain the indoor temperature within a comfortable range for users can be effectively reduced, lowering the operating cost of dual-cooling air conditioners.

[0107] Figure 3 This is a schematic diagram of the structure of the control device for a dual-cooling air conditioner provided in an embodiment of this disclosure.

[0108] This disclosure provides a control device for a dual-cooling air conditioner, the structure of which is as follows: Figure 3 As shown, it includes:

[0109] The processor 300 and memory 301 may further include a communication interface 302 and a bus 303. The processor 300, communication interface 302, and memory 301 can communicate with each other via the bus 303. The communication interface 302 can be used for information transmission. The processor 300 can call logical instructions stored in the memory 301 to execute the control method for a dual-cooling air conditioner described in the above embodiment.

[0110] Furthermore, the logic instructions in the aforementioned memory 301 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0111] The memory 301, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 300 executes functional applications and data processing by running the program instructions / modules stored in the memory 301, thereby implementing the control method for a dual-cooling air conditioner in the above method embodiments.

[0112] The memory 301 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 301 may include high-speed random access memory and may also include non-volatile memory.

[0113] Here, the dual-cooling air conditioner provided in this disclosure also includes the control device for the dual-cooling air conditioner shown in the foregoing embodiments.

[0114] This disclosure also provides a computer-readable storage medium storing computer-executable instructions configured to execute the above-described control method for a dual-cooling air conditioner.

[0115] This disclosure also provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, cause the computer to perform the above-described control method for a dual-cooling air conditioner.

[0116] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0117] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code; it can also be a transient storage medium.

[0118] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or replace parts and features of other embodiments. The scope of the embodiments of this disclosure includes the entire scope of the claims and all available equivalents of the claims. While the terms “first,” “second,” etc., may be used in this application to describe elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, a first element may be called a second element without changing the meaning of the description, and similarly, a second element may be called a first element, provided that all occurrences of “first element” are consistently renamed and all occurrences of “second element” are consistently renamed. First and second elements are both elements, but may not be the same element. Moreover, the terminology used in this application is only for describing embodiments and is not intended to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to also include the plural forms. Similarly, the term “and / or” as used herein means including one or more of the associated listed elements and all possible combinations thereof. Additionally, when used herein, the terms “comprise” and its variations “comprises” and / or “comprising” refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase “comprising an…” does not exclude the presence of additional identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0119] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0120] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0121] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A control method applied to a dual refrigeration air conditioner, characterized by, The double refrigeration air conditioner comprises a refrigerant heat exchange system and an adsorption refrigeration system, wherein the evaporation part of the adsorption refrigeration system is arranged at the indoor side, and the adsorption part is arranged at the outdoor heat exchanger of the refrigerant heat exchange system. In the case that the refrigerant heat exchange system operates in the refrigerant refrigeration mode, the adsorption refrigeration system is controlled to enter the desorption cold storage mode. The first temperature of the evaporation part is obtained. If the first temperature of the evaporation part is greater than or equal to the set temperature threshold, the desorption cold storage mode is controlled to be exited. The set temperature threshold is determined according to the outdoor environment temperature, and the corresponding set temperature threshold is obtained from a preset first correlation relationship according to the outdoor environment temperature; the first correlation relationship comprises a one-to-one correspondence between the outdoor environment temperature and the set temperature threshold, and the outdoor environment temperature and the set temperature threshold are positively correlated in the first correlation relationship.

2. The control method according to claim 1, characterized by, Before the desorption cold storage mode is controlled to be exited, the following steps are further included: It is determined that the running duration of the desorption cold storage mode meets the set duration condition.

3. The control method according to claim 2, characterized by, The set duration condition comprises that the running duration of the desorption cold storage mode is greater than or equal to the duration threshold.

4. The control method according to claim 1, characterized by, Before the desorption cold storage mode is controlled to be exited, the following steps are further included: The adsorption medium amount of the evaporation part is detected. It is determined that the adsorption medium amount of the evaporation part meets the set medium amount condition.

5. The control method according to claim 4, characterized by The set medium amount condition comprises that the adsorption medium amount of the evaporation part is greater than or equal to the set medium amount threshold.

6. A control device for a dual refrigeration air conditioner, characterized by comprising: The double refrigeration air conditioner comprises a refrigerant heat exchange system and an adsorption refrigeration system, wherein the evaporation part of the adsorption refrigeration system is arranged at the indoor heat exchanger of the refrigerant heat exchange system, and the adsorption part is arranged at the outdoor heat exchanger of the refrigerant heat exchange system. The control device comprises a processor and a memory storing program instructions, and the processor is configured to execute the program instructions to perform the control method applied to the double refrigeration air conditioner according to any one of claims 1 to 5.

7. A dual refrigeration air conditioner characterized by It comprises: A refrigerant heat exchange system mainly comprising an indoor heat exchanger, an outdoor heat exchanger, a compressor and a throttling device; One or more adsorption refrigeration systems, each comprising: An evaporation part arranged at the indoor heat exchanger of the refrigerant heat exchange system; An adsorption part arranged at the outdoor heat exchanger of the refrigerant heat exchange system, and an adsorption medium conveying flow path is constructed between the adsorption part and the evaporation part; The control device applied to the double refrigeration air conditioner according to claim 6.

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