air conditioner

Abstract

The present invention provides an air conditioner having a first working side and a second working side, and including a temperature control system and a humidity control system. The temperature control system is provided with an evaporator on the first working side and a condenser on the second working side. The humidity control system includes a first humidity control device and a second humidity control device, wherein a liquid desiccant is provided within the humidity control system. The first humidity control device is disposed near the evaporator and is configured to cool the liquid desiccant on the first working side and absorb moisture near the evaporator. The second humidity control device is disposed near the condenser and is configured to heat the liquid desiccant on the second working side and release moisture near the condenser. The air conditioner of the present invention fully utilizes the cooling capacity removed from the indoor side by the liquid desiccant in heating mode or the heat removed from the indoor side in cooling mode, and uses the cooling capacity to cool the condenser in heating mode or heat the evaporator in cooling mode, thereby improving the heat exchange efficiency of the air conditioner's outdoor unit.

Description

Technical Field

[0001] The present invention relates to the field of household appliances, and in particular to an air conditioner. Background Art

[0002] Current air conditioners generally have both cooling and heating functions. In hot summer weather, users typically turn on the air conditioner's cooling function to lower the indoor temperature. However, the hotter the weather, the greater the demand for cooling, causing the outdoor unit to overheat and shut down in high temperatures. In cold winter weather, users typically turn on the air conditioner's heating function to raise the indoor temperature. However, the colder the weather, the greater the demand for heating, causing the outdoor unit to frost and shut down in low temperatures and high relative humidity. Therefore, how to reduce overheating in the summer and frost in the winter and improve the heat exchange efficiency of the outdoor unit are challenges that most air conditioners face.

[0003] In addition, in summer, when indoor temperatures are lower than outdoor temperatures, users experience more humid air. Conversely, in winter, when indoor temperatures are higher, users experience more dry air. Therefore, users often require air conditioners with humidity control functions. However, existing air conditioners often have independent functional systems, including temperature and humidity control systems. These unrelated functional systems often fail to coordinate with each other, resulting in inefficient energy utilization. Summary of the Invention

[0004] Based on the above background, an object of the present invention is to provide an air conditioner that can improve the heat exchange efficiency of an outdoor unit of the air conditioner by using a humidity adjustment system.

[0005] Another object of the present invention is to improve the utilization of the heat carried by the liquid desiccant.

[0006] Another object of the present invention is to optimize the humidity regulation effect of the air conditioner.

[0007] In particular, according to a first aspect of the present invention, there is provided an air conditioner having a first working side and a second working side, and including a temperature control system and a humidity control system. The temperature control system includes an evaporator on the first working side and a condenser on the second working side. The humidity control system includes a first humidity control device and a second humidity control device, each of which includes a liquid desiccant. The first humidity control device is positioned near the evaporator and configured to cool the liquid desiccant on the first working side and absorb moisture near the evaporator. The second humidity control device is positioned near the condenser and configured to heat the liquid desiccant on the second working side and release moisture near the condenser, thereby regenerating the liquid desiccant.

[0008] Optionally, the temperature control system also includes a refrigerant pipe, which is used to form a closed loop for circulating the refrigerant between the evaporator and the condenser; the humidity control system also includes a desiccant pipe, which is used to form a closed loop for circulating the liquid desiccant between the first humidity control device and the second humidity control device; the desiccant pipe has a first heat exchange section for exchanging heat with the refrigerant pipe upstream of the evaporator, so that the liquid desiccant exchanges heat with the refrigerant in the refrigerant pipe corresponding to the first heat exchange section when flowing through the first heat exchange section; the desiccant pipe has a second heat exchange section for exchanging heat with the refrigerant pipe upstream of the condenser, so that the liquid desiccant exchanges heat with the refrigerant in the refrigerant pipe corresponding to the second heat exchange section when flowing through the second heat exchange section.

[0009] Optionally, the indoor side of the air conditioner is configured as the first working side, and the outdoor side of the air conditioner is configured as the second working side; and the length of the second heat exchange section is greater than the length of the first heat exchange section; or the indoor side of the air conditioner is configured as the second working side, and the outdoor side of the air conditioner is configured as the first working side; and the length of the first heat exchange section is greater than the length of the second heat exchange section.

[0010] Optionally, the first heat exchange section is located upstream of the first humidity control device; and the second heat exchange section is located upstream of the second humidity control device.

[0011] Optionally, the indoor side of the air conditioner is configured as a first working side, the outdoor side of the air conditioner is configured as a second working side, and the air conditioner is further configured to: obtain the indoor supply air temperature, the indoor air relative humidity, and the indoor dew point temperature, and compare the indoor air relative humidity with a first humidity range preset by the air conditioner; when the indoor air relative humidity exceeds the first humidity range, turn on the humidity control system; when the indoor air relative humidity is within the first humidity range and the indoor supply air temperature is higher than the indoor dew point temperature, turn on the humidity control system; when the indoor air relative humidity is within the first humidity range and the indoor supply air temperature is lower than the indoor dew point temperature, turn off the humidity control system; when the indoor air relative humidity is lower than the first humidity range, turn off the humidity control system.

[0012] Optionally, the first humidity range is set to 60% to 70%.

[0013] Optionally, the air conditioner is also configured to: when the relative humidity of the indoor air is lower than a third humidity threshold preset by the air conditioner, shut down the humidity control system, increase the indoor supply air temperature, and increase the indoor supply air speed; the third humidity threshold is lower than the minimum value of the first humidity range.

[0014] Optionally, the indoor side of the air conditioner is configured as the second working side, the outdoor side of the air conditioner is configured as the first working side, and the air conditioner is further configured to: obtain the outdoor outlet air temperature, the outdoor dew point temperature, the evaporator temperature, the indoor air relative humidity, and compare the indoor air relative humidity with a second humidity range preset by the air conditioner; when the indoor air relative humidity is lower than the second humidity range, turn on the humidity control system; when the indoor air relative humidity is within the second humidity range, the evaporator temperature is lower than the expected frost temperature, and the outdoor outlet air temperature is lower than the outdoor dew point temperature, turn on the humidity control system; when the indoor air relative humidity is within the second humidity range, the evaporator temperature is lower than the expected frost temperature, and the outdoor outlet air temperature is lower than the outdoor dew point temperature, turn off the humidity control system; when the indoor air relative humidity is within the second humidity range, the evaporator temperature is lower than the expected frost temperature, and the outdoor outlet air temperature is higher than the outdoor dew point temperature, turn off the humidity control system; when the indoor air relative humidity is within the second humidity range, the evaporator temperature is lower than the expected frost temperature, and the outdoor outlet air temperature is higher than the outdoor dew point temperature, turn off the humidity control system; when the indoor air relative humidity is within the second humidity range, the evaporator temperature is higher than the expected frost temperature, turn off the humidity control system; when the indoor air relative humidity exceeds the second humidity range, turn off the humidity control system.

[0015] Optionally, the second humidity range is set to 30% to 80%.

[0016] Optionally, the first humidity control device and the second humidity control device each have a spray port and a solution tank, and the liquid desiccant is sprayed from the spray port and flows into the solution tank, thereby increasing the contact area between the liquid desiccant and the air.

[0017] In the heating mode of the air conditioner of the present invention, the first working side is the indoor side of the air conditioner. The liquid desiccant absorbs moisture from the indoor environment in the first humidity control device located near the indoor evaporator, and releases the moisture to the surrounding environment in the second humidity control device located near the outdoor condenser. At the same time, the liquid desiccant uses the cold energy it brings out from the indoor side to cool the condenser, thereby reducing overheating of the air conditioner's outdoor unit. In the cooling mode of the air conditioner of the present invention, the second working side is the indoor side of the air conditioner. The liquid desiccant releases moisture to the surrounding environment in the second humidity control device located near the indoor condenser, and absorbs moisture from the surrounding environment in the first humidity control device located near the outdoor evaporator. At the same time, the liquid desiccant uses the heat it brings out from the indoor side to heat the evaporator, thereby reducing overcooling and frosting of the air conditioner's outdoor unit. Therefore, the air conditioner of the present invention can improve the heat exchange efficiency of the air conditioner's outdoor unit regardless of whether it is used in cooling mode or heating mode.

[0018] Furthermore, the present invention also exchanges heat between the refrigerant pipe and the desiccant pipe of the temperature control system, and uses the cold energy carried by the liquid desiccant from the indoor side to cool the refrigerant before entering the condenser in the cooling mode, or uses the heat carried by the liquid desiccant from the indoor side to heat the refrigerant before entering the evaporator in the heating mode, thereby improving the utilization rate of the heat carried by the liquid desiccant and further reducing the overheating of the air conditioner outdoor unit in summer, overcooling and frosting in winter.

[0019] The present invention further improves the humidity adjustment system, thereby optimizing the humidity adjustment effect of the air conditioner.

[0020] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0022] Figure 1 is a block diagram of components of an air conditioner of the present invention;

[0023] Figure 2 is a schematic diagram of a temperature control system and a humidity control system of an air conditioner according to an embodiment of the present invention;

[0024] Figure 3 yes Figure 2 The schematic diagram of the air conditioner shown is in one operating mode;

[0025] Figure 4 yes Figure 2 The schematic diagram of the air conditioner shown is in another working mode.

[0026] Figure 5 FIG. 1 is a schematic diagram of a temperature control system and a humidity control system of an air conditioner according to another embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0028] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art may adjust them as needed to suit specific applications.

[0029] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example disclosed herein. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0030] Figure 1 1 is a schematic diagram showing the structural relationship of the air conditioner 10 of the present invention; Figure 2 FIG. 1 is a schematic structural diagram of a temperature control system 20 and a humidity control system 30 of an air conditioner 10 according to an embodiment of the present invention. Figure 2 A vertical dotted line is used to indicate the dividing line between the indoor and outdoor sides.

[0031] The air conditioner 10 of the present invention generally has a first working side D1 and a second working side D2. The air conditioner 10 includes a temperature control system 20 and a humidity control system 30. The temperature control system 20 is provided with an evaporator 22 on the first working side D1 and a condenser 24 on the second working side D2. The humidity control system 30 includes a first humidity control device 32 and a second humidity control device 34. A liquid desiccant is provided within the humidity control system 30. The first humidity control device 32 is positioned near the evaporator 22 and is configured to cool the liquid desiccant on the first working side D1 and absorb moisture near the evaporator 22. The second humidity control device 34 is positioned near the condenser 24 and is configured to heat the liquid desiccant on the second working side D2 and release moisture near the condenser 24, thereby regenerating the liquid desiccant.

[0032] Current air conditioners 10 generally have both cooling and heating functions. Regardless of whether the temperature control system 20 is in cooling or heating mode, the evaporator 22 and condenser 24 must work together to achieve a refrigerant heat absorption and heat release cycle. The heat exchanger 21 of the indoor unit of the air conditioner can be switched to either heat absorption or heat release function in either cooling or heating mode, and the same applies to the outdoor unit. In other words, the heat exchanger 21 of the indoor unit (and outdoor unit) can function as either the evaporator 22 or the condenser 24, depending on the operating mode.

[0033] For most split-type air conditioners 10, the first working side D1 and the second working side D2 correspond to the indoor side where the air conditioner indoor unit is located, and the outdoor side where the air conditioner outdoor unit is located. However, the first working side D1 and the second working side D2 do not have a fixed correspondence. Depending on the operating mode of the air conditioner 10, the first working side D1 (or the second working side D2) may correspond to either the indoor side or the outdoor side. For example, in the summer, when the user turns on the cooling mode of the air conditioner 10, the heat exchanger 21 of the air conditioner indoor unit acts as an evaporator 22 and absorbs heat, while the heat exchanger 21 of the air conditioner outdoor unit acts as a condenser 24 and releases heat. In this case, the first working side D1 corresponds to the indoor side, and the second working side D2 corresponds to the outdoor side.

[0034] When the user switches the air conditioner 10 to heating mode, the heat exchanger 21 of the indoor unit functions as the condenser 24, and the heat exchanger 21 of the outdoor unit functions as the evaporator 22. In this case, the second working side D2 corresponds to the indoor side, and the first working side D1 corresponds to the outdoor side.

[0035] Corresponding to the two heat exchangers 21 of the temperature control system 20, the humidity control system 30 also includes two humidity control devices 31. The humidity control device 31 located near the evaporator 22 is the first humidity control device 32, and the humidity control device 31 located near the condenser 24 is the second humidity control device 34. It will be understood that when the temperature control system 20 of the air conditioner 10 switches operating modes, the first humidity control device 32 and the second humidity control device 34 also switch accordingly. However, this switching between the first and second humidity control devices 32, 34 does not involve a change in the positions of the two humidity control devices 31. Similar to the switching between the evaporator 22 and condenser 24 in the temperature control system 20 depending on the operating mode, the switching between the first and second humidity control devices 32, 34 also switches the functions of the indoor (and outdoor) humidity control devices 31.

[0036] When the air conditioner 10 is in cooling mode, the indoor temperature is lower than the outdoor temperature. At this time, because the indoor temperature is closer to the dew point, the relative humidity of the air is higher, making the air feel humid. Therefore, in addition to turning on the cooling mode, users usually also turn on the dehumidification function of the air conditioner 10. Using liquid desiccant for dehumidification is a common dehumidification method. Liquid desiccant includes lithium chloride, lithium bromide, etc., and has a strong moisture absorption capacity at lower temperatures, but a weak moisture absorption capacity at higher temperatures, and may even release moisture.

[0037] Figure 3 yes Figure 2The schematic diagram of the air conditioner 10 shown in an operating mode shows the flow direction of the refrigerant in the temperature control system 20 with a solid arrow, and the flow direction of the liquid desiccant in the humidity control system 30 with a dotted arrow. It can be seen that the flow directions of the refrigerant and the liquid desiccant are corresponding.

[0038] The first humidity control device 32 is arranged close to the evaporator 22, so that the low temperature environment formed by the heat absorption of the evaporator 22 can be used to cool the liquid desiccant in the first humidity control device 32, thereby improving the efficiency of the liquid desiccant in absorbing water. Figure 3 As shown, when the air conditioner 10 is in the cooling mode, the liquid desiccant in the first humidity control device 32 absorbs indoor moisture, thereby reducing the air humidity of the indoor environment.

[0039] The second humidity control device 34 is positioned near the condenser 24. This allows the high temperature generated by the heat released by the condenser 24 to heat the liquid desiccant in the second humidity control device 34. This in turn causes the liquid desiccant, which has absorbed moisture and flows through the humidity control system 30 circuit, to release moisture and be discharged with the airflow from the condenser 24 fan. When the air conditioner 10 is in cooling mode, the moisture released from the second humidity control device 34 is discharged with the airflow from the air conditioner's outdoor unit. Because the liquid desiccant in the second humidity control device 34 originates from the indoor environment and is at a lower temperature, it absorbs heat in the air conditioner's outdoor unit, raising its temperature and correspondingly lowering the temperature of the condenser 24. Furthermore, the released moisture increases the humidity of the air surrounding the condenser 24, increasing the specific heat capacity of the air surrounding the condenser 24, further improving the heat dissipation efficiency of the condenser 24. Consequently, the humidity control system 30 effectively improves the heat exchange efficiency of the air conditioner's outdoor unit in cooling mode.

[0040] Thus, the liquid desiccant in the humidity control system 30 absorbs moisture in the first humidity control device 32 and releases moisture in the second humidity control device 34, thereby achieving a regeneration cycle of the liquid desiccant.

[0041] Figure 4 yes Figure 2 The schematic diagram of the air conditioner 10 shown in another working mode also shows the flow direction of the refrigerant in the temperature control system 20 with solid arrows, and the flow direction of the liquid desiccant in the humidity control system 30 with dotted arrows.

[0042] refer to Figure 4As shown, in contrast to cooling mode, when the air conditioner 10 is in heating mode, the heat exchanger 21 on the outdoor side, i.e., in the air conditioner's outdoor unit, acts as the evaporator 22, absorbing heat. The liquid desiccant in the first humidity control device 32 cools the air conditioner and absorbs moisture near the evaporator 22. The main reasons for poor heat exchange efficiency in the air conditioner's outdoor unit in winter include low outdoor temperatures, resulting in poor refrigerant heat exchange (heat absorption) efficiency, and frost on the evaporator 22. The liquid desiccant in the first humidity control device 32 not only provides heat to the area near the evaporator 22 during the cooling process, but also absorbs moisture near the evaporator 22, effectively reducing the amount of frost. Thus, the humidity control system 30 effectively improves the heat exchange efficiency of the air conditioner's outdoor unit in heating mode.

[0043] In contrast to summer, when the air conditioner is in cooling mode, the higher indoor temperatures in winter often cause users to experience dry air and activate the air conditioner's humidification function. The absorbed moisture in the liquid desiccant flows into the second humidity control device 34 indoors, where it releases moisture due to the increased temperature, thereby increasing the indoor humidity.

[0044] The air conditioner 10 of the present invention achieves the regeneration cycle of the liquid desiccant without relying on additional heating / cooling devices through the close cooperation between the temperature control system 20 and the humidity control system 30, so that the air conditioner 10 has a continuous humidity control function, and fully utilizes the heat / cold brought out of the room by the liquid desiccant to reduce the degree of overcooling / overheating of the heat exchanger 21 in the outdoor unit of the air conditioner, and also fully utilizes the humidity control system 30 to humidify / dehumidify the environment around the heat exchanger 21 in the outdoor unit of the air conditioner, thereby effectively improving the heat exchange efficiency of the outdoor unit of the air conditioner.

[0045] In some optional embodiments, the temperature control system 20 also includes a refrigerant pipe, which is used to form a closed loop for circulating the refrigerant between the evaporator 22 and the condenser 24; the humidity control system 30 also includes a desiccant pipe, which is used to form a closed loop for circulating the liquid desiccant between the first humidity control device 32 and the second humidity control device 34; the desiccant pipe has a first heat exchange section 33 for exchanging heat with the refrigerant pipe upstream of the evaporator 22, so that the liquid desiccant exchanges heat with the refrigerant in the refrigerant pipe corresponding to the first heat exchange section 33 when flowing through the first heat exchange section 33; the desiccant pipe has a second heat exchange section 35 for exchanging heat with the refrigerant pipe upstream of the condenser 24, so that the liquid desiccant exchanges heat with the refrigerant in the refrigerant pipe corresponding to the second heat exchange section 35 when flowing through the second heat exchange section 35.

[0046] refer to Figure 3 or Figure 4As shown, the dotted-line frame schematically defines the heat exchange locations between the first and second heat exchange sections 33, 35 and the refrigerant pipe. It can be seen that the first and second heat exchange sections 33, 35 are closer to the refrigerant pipe than other parts of the desiccant pipe. On the first working side D1, the first heat exchange section 33 in the desiccant pipe exchanges heat with the refrigerant pipe upstream of the evaporator 22 (i.e., the refrigerant pipe in the direction of refrigerant flow). On the second working side D2, the second heat exchange section 35 in the desiccant pipe exchanges heat with the refrigerant pipe upstream of the condenser 24.

[0047] When the air conditioner 10 is in cooling mode, the heat exchanger 21 of the air conditioner's outdoor unit functions as a condenser 24. Since the outdoor ambient temperature is often relatively high while the condenser 24 is releasing heat, the heat exchange efficiency between the condenser 24 and the ambient air is low in high outdoor temperatures. To improve the heat exchange efficiency of the air conditioner's outdoor unit, the air conditioner 10 of the present invention further includes a second heat exchange section 35 in the desiccant pipe. This section exchanges heat with the refrigerant pipe upstream of the condenser 24, thereby lowering the temperature of the refrigerant flowing into the condenser 24 and reducing the heat dissipation requirement of the condenser 24.

[0048] When the air conditioner 10 is in heating mode, the heat exchanger 21 of the air conditioner's outdoor unit functions as the evaporator 22. The condenser 24 absorbs heat while the outdoor ambient temperature is often relatively low, resulting in a low heat exchange efficiency between the condenser 24 and the ambient air. Therefore, the air conditioner 10 of the present invention further includes a first heat exchange section 33 in the desiccant pipe, which exchanges heat with the refrigerant pipe upstream of the evaporator 22, thereby increasing the temperature of the refrigerant flowing into the evaporator 22.

[0049] In some optional embodiments, the indoor side of the air conditioner 10 is configured as the first working side D1, and the outdoor side of the air conditioner 10 is configured as the second working side D2; and the length of the second heat exchange section 35 is greater than the length of the first heat exchange section 33; or the indoor side of the air conditioner 10 is configured as the second working side D2, and the outdoor side of the air conditioner 10 is configured as the first working side D1; and the length of the first heat exchange section 33 is greater than the length of the second heat exchange section 35.

[0050] When the indoor side corresponds to the first working side D1, that is, when the air conditioner 10 is in the cooling mode, Figure 3 As shown, the outdoor heat exchanger 21 is used as a condenser 24, and the second heat exchange section 35 corresponding to the refrigerant pipe on the condenser 24 side is preferably longer than the first heat exchange section 33 corresponding to the refrigerant pipe on the evaporator 22 side, thereby increasing the heat exchange rate between the outdoor refrigerant pipe and the desiccant pipe, and making full use of the cooling capacity of the liquid desiccant to cool the refrigerant that has not yet flowed into the condenser 24.

[0051] When the indoor side corresponds to the second working side D2, that is, when the air conditioner 10 is in the heating mode, Figure 4 As shown, the outdoor heat exchanger 21 is used as the evaporator 22, and the first heat exchange section 33 corresponding to the refrigerant pipe on the evaporator 22 side is preferably longer than the second heat exchange section 35 corresponding to the refrigerant pipe on the condenser 24 side, thereby increasing the heat exchange rate between the outdoor refrigerant pipe and the desiccant pipe, and making full use of the heat of the liquid desiccant to heat the refrigerant that has not yet flowed into the condenser 24.

[0052] Generally speaking, under the same working mode, the length of the heat exchange section on the outdoor side is greater than the length of the heat exchange section on the indoor side.

[0053] In some optional embodiments, the first heat exchange section 33 is located upstream of the first humidity control device 32 ; and the second heat exchange section 35 is located upstream of the second humidity control device 34 .

[0054] The air conditioner 10 of the present invention can further, in addition to aligning the first heat exchange section 33 (and the second heat exchange section 35) in the humidity control system 30 with the refrigerant pipeline upstream of the heat exchanger 21 in the temperature control system 20, dispose the first heat exchange section 33 and the second heat exchange section 35 upstream of the first humidity control device 32 and the second humidity control device 34, respectively. In other words, the liquid desiccant exchanges heat with the refrigerant in the corresponding refrigerant pipeline before flowing into the first humidity control device 32 (or the second humidity control device 34).

[0055] On the one hand, because the liquid desiccant absorbs moisture at low temperatures and releases it at high temperatures, heat exchange before the liquid desiccant flows into the humidity control device 31 can pre-cool / preheat the liquid desiccant, thereby improving its efficiency in absorbing / releasing moisture. On the other hand, during the process of absorbing / releasing moisture in the humidity control device 31, the liquid desiccant loses heat / cold through heat exchange with the air. For the outdoor heat exchanger 21, whether it functions as a condenser 24 or an evaporator 22, it is difficult to fully utilize the heat / cold transferred from the liquid desiccant to the ambient air. Therefore, heat exchange with the refrigerant before it flows into the heat exchanger 21 can maximize the use of the heat / cold carried by the liquid desiccant to cool / heat the refrigerant, thereby reducing the heat exchange demand on the heat exchanger 21 in the outdoor air conditioner unit and improving heat exchange efficiency.

[0056] In addition, since the heat exchanger 21 and the humidity control device 31 on the indoor and outdoor sides are arranged close to each other, it is more convenient to arrange the pipeline of the air conditioner 10 by arranging the heat exchange section upstream of the humidity control device 31 corresponding to the refrigerant pipeline arranged upstream of the heat exchanger 21, thereby saving the layout space of the indoor unit and the outdoor unit of the air conditioner.

[0057] In particular, in some preferred embodiments, the air conditioner 10 of the present invention not only has the first heat exchange section 33 located upstream of the first humidity control device 32, but also has the second heat exchange section 35 located upstream of the second humidity control device 34. Furthermore, when the indoor side of the air conditioner 10 is configured as the first working side D1 and the outdoor side of the air conditioner 10 is configured as the second working side D2, the length of the second heat exchange section 35 is greater than the length of the first heat exchange section 33; and when the indoor side of the air conditioner 10 is configured as the second working side D2 and the outdoor side of the air conditioner 10 is configured as the first working side D1, the length of the first heat exchange section 33 is greater than the length of the second heat exchange section 35.

[0058] The above-mentioned preferred embodiment enables the outdoor heat exchanger 21 to maximize the use of the cold / heat carried by the liquid desiccant in the humidity control system 30, while meeting the pre-cooling / preheating requirements of the indoor liquid desiccant, and reducing the impact of the refrigerant cold / heat loss on the temperature control system 20 in regulating the indoor ambient temperature.

[0059] The heat exchange function between the first heat exchange section 33 (and the second heat exchange section 35) of the desiccant pipeline and the corresponding refrigerant pipeline can be achieved in a variety of ways, such as placing the first heat exchange section 33 (and the second heat exchange section 35) against the corresponding refrigerant pipeline, or winding the first heat exchange section 33 (or the second heat exchange section 35) around the refrigerant pipeline, or winding the refrigerant pipeline around the first heat exchange section 33 (or the second heat exchange section 35), etc. Preferably, the outdoor heat exchange section is wound around the refrigerant pipeline to increase the heat exchange area, while the indoor heat exchange section is placed against the refrigerant pipeline to only pre-cool / preheat the liquid desiccant.

[0060] from Figure 2 It can be seen that in the same air conditioner 10 of the present invention, the indoor and outdoor humidity control devices 31 each have a heat exchange section on both sides. Figure 3 and Figure 4 It can be seen that when the air conditioner 10 of the present invention switches between the cooling and heating operating modes, the functions of the indoor (and outdoor) heat exchanger 21 and the humidity control device 31 are also switched accordingly.

[0061] In some embodiments of the present invention, the operating mode of the temperature control system 20 is switched by an electrically controlled four-way valve provided near the compressor 26, thereby controlling whether the refrigerant pumped therefrom flows to the indoor side or the outdoor side while the operating condition of the compressor 26 itself remains unchanged. The humidity control system 30 is also switched synchronously with the operating mode of the temperature control system 20. Specifically, each heat exchange section (including the first heat exchange section 33 and the second heat exchange section 35 on the indoor side, and the first heat exchange section 33 and the second heat exchange section 35 on the outdoor side) is respectively provided in a branch of the desiccant pipe loop of the humidity control system 30 and is controlled by a three-way valve. When the temperature control system 20 is switched to cooling mode, the three-way valve corresponding to the branch where the first heat exchange section 33 on the indoor side is located adjusts its own opening and closing state so that the desiccant pipe loop passes through the first heat exchange section 33 on the indoor side. Correspondingly, the other three-way valves will also adjust their own opening and closing states synchronously. The same applies to the heating mode.

[0062] In the corresponding working mode, the corresponding three-way valve is adjusted to prevent the refrigerant pipe downstream of the outdoor heat exchanger 21 from exchanging heat with the heat exchange section at the corresponding position, which can prevent the refrigerant from losing cold / heat after the heat exchange is completed, thereby not affecting the operating efficiency of the temperature control system 20.

[0063] A liquid pump 36 is also provided in each of the two pipes connecting the indoor humidity control device 31 and the outdoor humidity control device 31. Liquid pump 36 is preferably a bidirectional pump. When the temperature control system 20 adjusts its operating mode, the liquid pump 36 also adjusts its output direction to change the flow direction of the liquid desiccant. Alternatively, liquid pump 36 can be configured as a unidirectional pump, and the flow direction of the liquid desiccant can be adjusted by other means, such as a four-way valve.

[0064] refer to Figure 2 As shown, it can be understood that the temperature control system 20 is also provided with a throttling device 28 and other devices not shown in the figure. Preferably, the heat exchange position between the refrigerant pipe and the first heat exchange section 33 or the second heat exchange section 35 should be close to the heat exchanger 21, and it is not appropriate to allow the part of the refrigerant pipe separated by the throttling device 28 or other devices to exchange heat with the first heat exchange section 33 or the second heat exchange section 35.

[0065] A liquid storage tank 38 may be provided in the humidity control system 30. When the humidity control system 30 is turned off, the liquid desiccant may be stored in the liquid storage tank 38. A cleaning device may also be provided in the liquid storage tank 38 to clean and filter the liquid desiccant.

[0066] Figure 5 FIG. 1 is a schematic diagram of a temperature adjustment system 20 and a humidity adjustment system 30 of an air conditioner 10 according to another embodiment of the present invention.

[0067] refer to Figure 5As shown, in some preferred embodiments of the present invention, the first heat exchange section 33 and the second heat exchange section 35 on the indoor side (or outdoor side) are both located on the same side of the humidity control device 31, and the liquid pump 36 in the humidity control system 30 is a one-way pump. The one-way output of the liquid pump 36 causes the liquid desiccant to flow through the first heat exchange section 33 or the second heat exchange section 35 (depending on the operating mode of the air conditioner 10) before flowing into the humidity control device 31. In other words, in any operating mode, the first heat exchange section 33 and the second heat exchange section 35 on the indoor side (or outdoor side) are both located upstream of the humidity control device 31.

[0068] This embodiment effectively simplifies the air conditioner's control system, reducing costs. It also simplifies the desiccant piping layout within humidity control system 30. Since the liquid desiccant only needs to flow in a constant direction regardless of whether the air conditioner 10 is in cooling or heating mode, controlling the output direction of liquid pump 36 is eliminated, thereby avoiding the need for a costly bidirectional pump. Furthermore, since the liquid desiccant input and output ports of humidity control device 31 are fixed, the desiccant piping layout within humidity control device 31 can be simplified.

[0069] In some optional embodiments, the indoor side of the air conditioner 10 is configured as a first working side D1, the outdoor side of the air conditioner 10 is configured as a second working side D2, and the air conditioner 10 is further configured to: obtain the indoor supply air temperature, the indoor air relative humidity, and the indoor dew point temperature, and compare the indoor air relative humidity with a first humidity range preset by the air conditioner 10; when the indoor air relative humidity exceeds the first humidity range, turn on the humidity control system 30; when the indoor air relative humidity is within the first humidity range and the indoor supply air temperature is higher than the indoor dew point temperature, turn on the humidity control system 30; when the indoor air relative humidity is within the first humidity range and the indoor supply air temperature is lower than the indoor dew point temperature, turn off the humidity control system 30; when the indoor air relative humidity is lower than the first humidity range, turn off the humidity control system 30.

[0070] The indoor side of the air conditioner 10 is configured as the first working side D1, and the outdoor side of the air conditioner 10 is configured as the second working side D2. This means that the air conditioner 10 is in cooling mode, at which point the user often requires the dehumidification function of the air conditioner 10. Therefore, when the indoor relative humidity exceeds the first humidity range, the humidity control system 30 is activated for dehumidification. When the indoor relative humidity is within the first humidity range, if the indoor supply air temperature is higher than the indoor dew point, the humidity control system 30 is also activated. If the indoor supply air temperature is lower than the indoor dew point, condensation will form on the evaporator 22 as the air circulates, reducing the indoor humidity. Therefore, the humidity control system 30 is deactivated. When the indoor relative humidity falls below the first humidity range, the humidity control system 30 is deactivated.

[0071] In some optional embodiments, the air conditioner 10 is further configured to: when the relative humidity of the indoor air is lower than a third humidity threshold preset by the air conditioner 10, shut down the humidity control system 30, increase the indoor supply air temperature, and increase the indoor supply air speed; the third humidity threshold is lower than the minimum value of the first humidity range.

[0072] The third humidity threshold is lower than the first humidity range. If the relative humidity of the indoor air obtained by the air conditioner 10 is already lower than the third humidity threshold, it means that the indoor air is dry. Therefore, it is preferred that the air conditioner 10 slightly increase the indoor supply air temperature to reduce condensation on the evaporator 22, and at the same time increase the supply air speed to speed up the heat exchange rate of the evaporator 22, and ensure that the user's perceived temperature does not change significantly with the increase in the supply air temperature of the air conditioner 10.

[0073] In some optional embodiments, the first humidity range is set to 60% to 70%. This value is a preferred factory default value for the air conditioner 10 of the present invention and can be adjusted by the user. The value of 60% is the user-adjustable target humidity, and the upper limit of the first humidity range is based on this target humidity and increased by 10%. Of course, different air conditioners 10 can also flexibly adjust these values ​​according to the different climate environments in which the air conditioner 10 is used.

[0074] The most comfortable indoor relative humidity for the human body is generally in the range of 45% to 60%, and the third humidity threshold is usually set to 45% by default. If the user prefers a dry environment and adjusts the first humidity range higher or lower, the air conditioner 10 can automatically adjust the third humidity threshold to 10% to 15% lower than the target humidity.

[0075] In some optional embodiments, the indoor side of the air conditioner 10 is configured as the second working side D2, the outdoor side of the air conditioner 10 is configured as the first working side D1, and the air conditioner 10 is further configured to: obtain the outdoor outlet air temperature, the outdoor dew point temperature, the evaporator 22 temperature, and the indoor air relative humidity, and compare the indoor air relative humidity with a second humidity range preset by the air conditioner 10; when the indoor air relative humidity is lower than the second humidity range, turn on the humidity control system 30; when the indoor air relative humidity is within the second humidity range, the evaporator 22 temperature is lower than the expected frosting temperature, and the outdoor outlet air temperature is lower than the outdoor dew point temperature, turn on the humidity control system 30; when the indoor air relative humidity is within the second humidity range, the evaporator 22 temperature is lower than the expected frosting temperature, and the outdoor outlet air temperature is higher than the outdoor dew point temperature, turn off the humidity control system 30; when the indoor air relative humidity is within the second humidity range, the evaporator 22 temperature is lower than the expected frosting temperature, and the outdoor outlet air temperature is higher than the outdoor dew point temperature, turn off the humidity control system 30; when the indoor air relative humidity is within the second humidity range, the evaporator 22 temperature is higher than the expected frosting temperature, turn off the humidity control system 30; when the indoor air relative humidity exceeds the second humidity range, turn off the humidity control system 30.

[0076] The indoor side of the air conditioner 10 is configured as the second working side D2, and the outdoor side of the air conditioner 10 is configured as the first working side D1. This means that the air conditioner 10 is in heating mode, during which users often require the humidification function of the air conditioner 10. In addition to turning on the humidity control system 30 when the indoor relative humidity falls below a second humidity range, and turning off the humidity control system 30 when the indoor relative humidity exceeds the second humidity range, the air conditioner 10 of the present invention further improves the humidity control system 30 based on outdoor temperature and humidity conditions.

[0077] Specifically, on the basis that the relative humidity of the indoor air is within the second humidity range (indicating that the indoor environmental humidity is suitable), if the temperature of the evaporator 22 is lower than the expected frost temperature and the outdoor air outlet temperature is lower than the outdoor dew point temperature (indicating that frost may form on the outdoor evaporator 22), the humidity control system 30 is turned on, thereby absorbing moisture near the evaporator 22 on the one hand and supplying heat to the evaporator 22 and the refrigerant flowing into the evaporator 22 on the other hand, thereby reducing the occurrence of frost; if the temperature of the evaporator 22 is lower than the expected frost temperature and the outdoor air outlet temperature is higher than the outdoor dew point temperature (indicating that the temperature of the evaporator 22 reaches the frost condition, but the moisture in the environment will not condense on the evaporator 22, and dehumidification is not required), the humidity control system 30 is turned off; if the temperature of the evaporator 22 is higher than the expected frost temperature, the humidity control system 30 is also turned off.

[0078] Through the above further configuration, the air conditioner 10 of the present invention will determine whether to turn on the humidity control system 30 based on the defrosting requirement of the outdoor evaporator 22 in the heating mode even if the indoor ambient humidity is appropriate.

[0079] In some optional embodiments, the second humidity range is set to 30% to 80%. This value is also the preferred factory preset value of the air conditioner 10 of the present invention and can be actively adjusted by the user. In addition, the expected frost temperature generally refers to the freezing point of water, that is, the temperature at which liquid water will frost on the evaporator 22. This temperature may vary due to different local air pressures, so the air conditioners 10 in different installation areas can be adjusted accordingly. In particular, in order to enable the air conditioner 10 to prevent frost before the evaporator 22 frosts, the expected frost temperature can be slightly increased so that the humidity control system 30 has an anti-frost effect on the evaporator 22. For example, the expected frost temperature of the air conditioner 10 can be set to 1°C under normal atmospheric pressure.

[0080] In some optional embodiments, the first humidity control device 32 and the second humidity control device 34 each have a spray port and a solution tank, and the liquid desiccant is sprayed from the spray port and flows into the solution tank, thereby increasing the contact area between the liquid desiccant and the air.

[0081] Although the humidity control system 30 of the air conditioner 10 of the present invention can also be used for defrosting the outdoor unit of the air conditioner in winter, it does not affect the defrosting system of the air conditioner 10 itself. The air conditioner 10 of the present invention can use the humidity control system 30 for auxiliary defrosting on the basis of having an independent defrosting system.

[0082] The air conditioner 10 of the present invention includes not only the split-type air conditioner 10 having independent indoor and outdoor units as described in the above-mentioned embodiment, but also other air conditioners 10, such as window air conditioners. Based on the present invention, those skilled in the art can reasonably arrange the evaporator 22 and condenser 24 of the air conditioner 10 according to the specific positions, thereby implementing the technical solutions of the present invention. Furthermore, while the air conditioner 10 of the above-mentioned embodiment has both cooling and heating operating modes, those skilled in the art can also apply the technical solutions of the present invention to air conditioners 10 having only cooling or heating functions.

[0083] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. An air conditioner having a first working side and a second working side; the air conditioner comprising: a temperature regulation system, the temperature regulation system being provided with an evaporator on the first working side and a condenser on the second working side; A humidity control system includes a first humidity control device and a second humidity control device, wherein a liquid desiccant is provided in the humidity control system; the first humidity control device is disposed near the evaporator and is configured to cool the liquid desiccant on the first working side and absorb moisture near the evaporator; the second humidity control device is disposed near the condenser and is configured to heat the liquid desiccant on the second working side and release moisture near the condenser, thereby regenerating the liquid desiccant; In a case where the indoor side of the air conditioner is configured as the first working side and the outdoor side of the air conditioner is configured as the second working side, the air conditioner is further configured as follows: obtaining an indoor supply air temperature, an indoor air relative humidity, and an indoor dew point temperature, and comparing the indoor air relative humidity with a first humidity range preset for the air conditioner; turning on the humidity control system if the indoor air relative humidity exceeds the first humidity range, or if the indoor air relative humidity is within the first humidity range and the indoor supply air temperature is higher than the indoor dew point temperature; and turning off the humidity control system if the indoor air relative humidity is within the first humidity range and the indoor supply air temperature is lower than the indoor dew point temperature, or if the indoor air relative humidity is lower than the first humidity range; or In a case where the indoor side of the air conditioner is configured as the second working side and the outdoor side of the air conditioner is configured as the first working side, the air conditioner is further configured as follows: Obtain the outdoor air outlet temperature, the outdoor dew point temperature, the evaporator temperature, and the indoor air relative humidity, and compare the indoor air relative humidity with a second humidity range preset for the air conditioner; turn on the humidity control system when the indoor air relative humidity is lower than the second humidity range, or when the indoor air relative humidity is within the second humidity range, and the evaporator temperature is lower than the expected frosting temperature, and when the outdoor air outlet temperature is lower than the outdoor dew point temperature; and turn off the humidity control system when the indoor air relative humidity is within the second humidity range, and the evaporator temperature is lower than the expected frosting temperature, and the outdoor air outlet temperature is higher than the outdoor dew point temperature, or when the indoor air relative humidity is within the second humidity range, and the evaporator temperature is higher than the expected frosting temperature, or when the indoor air relative humidity exceeds the second humidity range.

2. The air conditioner according to claim 1, wherein The temperature control system further includes a refrigerant pipe, the refrigerant pipe being used to form a closed loop for circulating the refrigerant between the evaporator and the condenser; The humidity control system further includes a desiccant pipe, the desiccant pipe being used to form a closed loop for circulating the liquid desiccant between the first humidity control device and the second humidity control device; The desiccant pipe has a first heat exchange section for exchanging heat with the refrigerant pipe upstream of the evaporator, so that the liquid desiccant exchanges heat with the refrigerant in the refrigerant pipe corresponding to the first heat exchange section when flowing through the first heat exchange section; The desiccant pipe has a second heat exchange section for exchanging heat with the refrigerant pipe upstream of the condenser, so that the liquid desiccant exchanges heat with the refrigerant in the refrigerant pipe corresponding to the second heat exchange section when flowing through the second heat exchange section.

3. The air conditioner according to claim 2, wherein: When the indoor side of the air conditioner is configured as the first working side and the outdoor side of the air conditioner is configured as the second working side, the length of the second heat exchange section is greater than the length of the first heat exchange section; or When the indoor side of the air conditioner is configured as the second working side and the outdoor side of the air conditioner is configured as the first working side, the length of the first heat exchange section is greater than the length of the second heat exchange section.

4. The air conditioner according to claim 2, wherein: The first heat exchange section is located upstream of the first humidity control device; and The second heat exchange section is located upstream of the second humidity control device.

5. The air conditioner according to claim 1, wherein The first humidity range is set to 60%~70%.

6. The air conditioner according to claim 1, wherein The air conditioner is further configured to: When the relative humidity of the indoor air is lower than a third humidity threshold preset by the air conditioner, shutting down the humidity control system, raising the indoor air supply temperature, and increasing the indoor air supply speed; The third humidity threshold is lower than the minimum value of the first humidity range.

7. The air conditioner according to claim 1, wherein The second humidity range is set to 30%~80%.

8. The air conditioner according to claim 1, wherein The first humidity control device and the second humidity control device each have a spray port and a solution tank. The liquid moisture absorbent is sprayed from the spray port and flows into the solution tank, thereby increasing the contact area between the liquid moisture absorbent and the air.

Images