Air conditioning unit

Abstract

The application discloses an air conditioning unit, which comprises a first refrigerant circulation loop and a second refrigerant circulation loop, the first refrigerant circulation loop comprises a fluorine pump, a first heat exchanger, a second heat exchanger and a liquid accumulator which are sequentially connected in a head-tail mode, the second refrigerant circulation loop comprises a compressor, a third heat exchanger, a throttling assembly and a fourth heat exchanger which are sequentially connected in a head-tail mode, a first end of the second heat exchanger is communicated with a first end of the third heat exchanger through a first refrigerant branch, a second end of the second heat exchanger is communicated with a second end of the third heat exchanger through a second refrigerant branch, a first end of the first heat exchanger is communicated with a first end of the fourth heat exchanger through a third refrigerant branch, and a second end of the third heat exchanger is communicated with a second end of the fourth heat exchanger through a fourth refrigerant branch. The air conditioning unit provided by the application has greatly improved energy efficiency ratio.

Description

Technical Field

[0001] This application belongs to the field of air conditioning system technology, and in particular relates to an air conditioning unit. Background Technology

[0002] With the rapid development of new-generation information technologies such as artificial intelligence, the scale and energy consumption of data centers are constantly increasing, placing higher demands on the energy efficiency of data center cooling equipment. Currently, refrigerant pump technology, as an energy-saving technology that effectively utilizes natural cooling sources, can reduce the energy consumption of air conditioning units under low-temperature conditions. When the refrigerant pump is insufficient to meet cooling demands, it is often used in combination with a compressor. This combination can be achieved through series or parallel air conditioning unit systems; however, both series and parallel systems suffer from low energy efficiency. Summary of the Invention

[0003] The purpose of this application is to at least solve the problem of low energy efficiency in air conditioning units. This purpose is achieved through the following technical solution:

[0004] The first aspect of this application proposes an air conditioning unit, comprising:

[0005] The first refrigerant circulation loop includes a refrigerant pump, a first heat exchanger, a second heat exchanger, and a liquid receiver connected in sequence from beginning to end.

[0006] The second refrigerant circulation loop includes a compressor, a third heat exchanger, a throttling component, and a fourth heat exchanger connected in sequence.

[0007] The second heat exchanger includes a first end connected to the liquid receiver and a second end connected to the first heat exchanger. The third heat exchanger includes a first end connected to the throttling assembly and a second end connected to the compressor. The first end of the second heat exchanger and the first end of the third heat exchanger are connected through a first refrigerant branch, which includes a first valve body for controlling the on / off state of the first refrigerant branch. The second end of the second heat exchanger and the second end of the third heat exchanger are connected through a second refrigerant branch, which includes a second valve body for controlling the on / off state of the second refrigerant branch.

[0008] The first heat exchanger includes a first end connected to the refrigerant pump and a second end connected to the second heat exchanger. The fourth heat exchanger includes a first end connected to the throttling assembly and a second end connected to the compressor. The first end of the first heat exchanger and the first end of the fourth heat exchanger are connected through a third refrigerant branch, and the third refrigerant branch includes a third valve body for controlling the on / off state of the third refrigerant branch. The second end of the third heat exchanger and the second end of the fourth heat exchanger are connected through a fourth refrigerant branch, and the fourth refrigerant branch includes a fourth valve body for controlling the on / off state of the fourth refrigerant branch.

[0009] In the air conditioning unit provided in this application, when only the compressor or refrigerant pump is turned on, the system only opens one refrigeration channel. However, by controlling the opening of the first, second, third, and fourth valve bodies, all four refrigerant branches can be opened, thus effectively utilizing the first, second, third, and fourth heat exchangers. When the compressor and refrigerant pump are turned on simultaneously, by controlling the closing of the first, second, third, and fourth valve bodies, all four refrigerant branches can be closed, allowing the first and second refrigerant circulation loops to operate independently in parallel. The air conditioning unit provided in this application, while expanding the application range of the refrigerant pump, avoids the increased fan energy consumption caused by partial idleness of the first, second, third, and fourth heat exchangers, thereby effectively improving the energy efficiency ratio of the air conditioning unit.

[0010] In some embodiments of this application, a fifth valve body is provided between the first end of the second heat exchanger and the liquid reservoir, and a sixth valve body is provided between the second end of the second heat exchanger and the first heat exchanger.

[0011] A seventh valve body is provided between the first end of the third heat exchanger and the throttling assembly, and an eighth valve body is provided between the second end of the third heat exchanger and the compressor.

[0012] A ninth valve body is provided between the first end of the first heat exchanger and the fluorine pump, and a tenth valve body is provided between the second end of the first heat exchanger and the second heat exchanger.

[0013] An eleventh valve body is provided between the first end of the third heat exchanger and the throttling assembly, and a twelfth valve body is provided between the second end of the third heat exchanger and the compressor.

[0014] In some embodiments of this application, the air conditioning unit includes: a first mode, a second mode, and a third mode, wherein:

[0015] The first mode includes:

[0016] The ninth valve, the tenth valve, the sixth valve, and the fifth valve are in the open state to open the first refrigerant circulation loop, while the eighth valve, the seventh valve, the eleventh valve, and the twelfth valve are in the closed state to keep the second refrigerant circulation loop closed.

[0017] The first valve body and the second valve body are in the open state, so that the third heat exchanger is connected to the first refrigerant circulation loop;

[0018] The third valve body and the fourth valve body are in the open state, so that the fourth heat exchanger is connected to the first refrigerant circulation loop;

[0019] The second mode includes:

[0020] The eighth valve body, the seventh valve body, the eleventh valve body, and the twelfth valve body are in the open state to open the second refrigerant circulation loop, and the ninth valve body, the tenth valve body, the sixth valve body, and the fifth valve body are in the closed state to keep the first refrigerant circulation loop closed.

[0021] The first valve body and the second valve body are in the open state, so that the second heat exchanger is connected to the second refrigerant circulation loop;

[0022] The third valve body and the fourth valve body are in the open state so that the first heat exchanger is connected to the second refrigerant circulation loop;

[0023] The third mode includes:

[0024] The ninth valve body, the tenth valve body, the sixth valve body, and the fifth valve body are in the open state to open the first refrigerant circulation loop;

[0025] The eighth valve body, the seventh valve body, the eleventh valve body and the twelfth valve body are in the open state to open the second refrigerant circulation loop;

[0026] The first valve body, the second valve body, the third valve body, and the fourth valve body are in a closed state, so that the first refrigerant circulation loop and the second refrigerant circulation loop are independent of each other.

[0027] In some embodiments of this application, the air conditioning unit includes an indoor unit and an outdoor unit. The outdoor unit includes an outdoor unit housing, and the outdoor unit housing includes a first cavity. The second heat exchanger and the third heat exchanger are located in the first cavity. The indoor unit includes an indoor unit housing, and the indoor unit housing has a second cavity formed therein. The first heat exchanger and the fourth heat exchanger are located in the second cavity.

[0028] In some embodiments of this application, the outdoor unit further includes an air duct and an exhaust port communicating with the first cavity. The air duct includes a first air duct, which includes a first air inlet and a first filter. The first filter is disposed at the first air inlet and is used to filter the gas entering the first cavity from the first air inlet.

[0029] In some embodiments of this application, the first air duct further includes a wet membrane disposed on the side of the first filter opposite to the first air inlet, and the wet membrane is used to cool the gas entering the first cavity from the first air inlet.

[0030] In some embodiments of this application, the outdoor unit further includes a cooling component, which includes a water distribution device and a water supply device. The water distribution device is disposed around at least a portion of the wet film, and the water distribution device is connected to the water supply device, which supplies water to the water distribution device.

[0031] In some embodiments of this application, the water supply device includes a water tank and a water pump, the water distribution device is connected to the water pump, the water pump is connected to the water tank, and the water pump is used to supply water from the water tank to the water distribution device.

[0032] In some embodiments of this application, the cooling component further includes a water return device, which includes a water collection tray and a water collection pipe. The water collection tray is located below the wet film and is used to collect water dripping from the wet film. The water collection pipe is connected to the water collection tray and the water tank, respectively.

[0033] In some embodiments of this application, the first air duct further includes a first air valve, which is used to control the opening or closing of the first air inlet.

[0034] In some embodiments of this application, the air duct includes a second air duct, which includes a second air valve, a second air inlet, and a second filter. The second air valve is used to control the opening or closing of the second air inlet, and the second filter is disposed at the second air inlet to filter the gas entering the first cavity through the second air inlet.

[0035] In some embodiments of this application, the air duct includes a first air duct and a second air duct, wherein there are two first air ducts arranged opposite to each other, and there are two second air ducts arranged opposite to each other.

[0036] In some embodiments of this application, the outdoor unit further includes an outdoor axial flow fan, which is located within the first cavity.

[0037] In some embodiments of this application, the liquid reservoir, the compressor, and the fluorine pump are located in the first cavity, and the throttling assembly is located in the second cavity.

[0038] In some embodiments of this application, the indoor unit further includes a return air vent and a supply air vent communicating with the second cavity, and the indoor unit further includes a third filter, which is disposed at the return air vent and is used to filter the gas entering the second cavity from the return air vent.

[0039] In some embodiments of this application, the indoor unit includes an indoor axial flow fan located within the second cavity.

[0040] In some embodiments of this application, the indoor unit further includes a return air vent and a supply air vent communicating with the second cavity. The supply air vent is located below the return air vent. The indoor unit also includes a baffle assembly, which includes a first baffle. The first baffle is disposed opposite to the return air vent. The first baffle has a first surface near the return air vent. The first surface includes a first end near the return air vent and a second end away from the return air vent. The second end is located on the side of the first end near the supply air vent.

[0041] In some embodiments of this application, the first surface is a first arc surface, and the first arc surface is recessed on the side away from the return air inlet.

[0042] In some embodiments of this application, the indoor unit further includes a return air vent and a supply air vent communicating with the second cavity. The supply air vent is located below the return air vent. The indoor unit also includes a baffle assembly, which includes a second baffle. The second baffle is disposed opposite to the supply air vent. The second baffle has a second surface near the supply air vent. The second surface includes a first end near the supply air vent and a second end away from the supply air vent. The second end is located on the side of the first end near the return air vent.

[0043] In some embodiments of this application, the second surface is a second arc surface, and the second arc surface is recessed on the side opposite to the air outlet. Attached Figure Description

[0044] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0045] Figure 1This is a structural diagram of an air conditioning unit in related technologies;

[0046] Figure 2 This is a structural diagram of an air conditioning unit in related technologies;

[0047] Figure 3 This is a schematic diagram of the structure of an air conditioning unit provided in an embodiment of this application;

[0048] Figure 4 This is a schematic diagram of an air conditioning unit provided in an embodiment of this application;

[0049] Figure 5 This is a schematic diagram of the first cooling mode of an air conditioning unit provided in an embodiment of this application;

[0050] Figure 6 This is a schematic diagram of the second cooling mode of an air conditioning unit provided in an embodiment of this application;

[0051] Figure 7 This is a schematic diagram of the third cooling mode of an air conditioning unit provided in an embodiment of this application;

[0052] Figure 8 This is a schematic diagram of the structure of an indoor and outdoor unit of an air conditioning unit provided in an embodiment of this application;

[0053] Figure 9 This is a schematic diagram of the structure of an indoor unit of an air conditioning unit provided in an embodiment of this application.

[0054] The attached figures are labeled as follows:

[0055] 210. Refrigerant pump components; 220. Compressor components; 230. First heat exchanger; 240. Second heat exchanger; 250. Third heat exchanger; 260. Fourth heat exchanger; 110. Outdoor unit housing; 111. First cavity; 112. First heat exchanger; 113. Second heat exchanger; 114. Third heat exchanger; 115. Fourth heat exchanger; 116. First valve body; 117. Second valve body; 118. Third valve body; 119. Fourth valve body; 120. Fifth valve body; 121. Sixth valve body; 122. Seventh valve body; 123. Eighth valve body; 124. Ninth valve body; 125. Tenth valve body; 126. Eleventh valve body; 127. Twelfth valve body; 128. Liquid receiver; 129. Compressor; 130. 131. Fluorine pump; 132. Air duct; 133. First air duct; 134. First air inlet; 135. First filter; 136. Wet film; 137. Second air duct; 148. Exhaust vent; 139. Cooling component; 140. Water distribution device; 1312. Water collection tray; 1313. Water collection pipe; 141. Water tank; 132. Water pump; 133. Outdoor axial flow fan; 144. Indoor unit housing; 15. Second cavity; 16. Electronic expansion valve; 17. Return air vent; 18. Supply air vent; 19. Third filter; 10. Indoor axial flow fan; 10. Deflector assembly; 11. First deflector; 12. Second deflector; 13. Outdoor unit; 14. Indoor unit. Detailed Implementation

[0056] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0057] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0058] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0059] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0060] Research has found that in existing technologies, the refrigerant pump component 210 and the compressor component 220 are often used together, and the connection methods for the refrigerant pump component 210 and the compressor component 220 include series and parallel connections, such as... Figure 1 The diagram shows an air conditioning unit with a refrigerant pump component 210 and a compressor component 220 connected in series. A first heat exchanger 230 and a second heat exchanger 240 are also connected in series. When the refrigerant pump component 210 and the compressor component 220 are connected in series, the refrigerant pump component 210 mode cannot meet the cooling demand when the outdoor temperature is high (t > 10℃), and only the compressor component 220 mode can be used. This results in a narrow application range for the refrigerant pump component 210 in this type of air conditioning unit, leading to a relatively low energy efficiency. Figure 2The diagram shows an air conditioning unit with a refrigerant pump component 210 and a compressor component 220 connected in parallel. It also includes a first heat exchanger 230, a second heat exchanger 240, a third heat exchanger 250, and a fourth heat exchanger 260 connected in series. This air conditioning unit can operate with the refrigerant pump component 210 when the outdoor temperature is not too high (t < 30℃), with the compressor component 220 supplementing the insufficient cooling capacity. At this time, the energy efficiency is relatively high. However, when the ambient temperature is low (t < 10℃) and only the refrigerant pump component 210 is operated, the second heat exchanger 230 in the compressor component 250 circuit... 40. The first heat exchanger 230 is not operating, which increases the fan resistance. When the ambient temperature is high (t > 30℃), if only the compressor unit 220 is turned on, the third heat exchanger 250 and the fourth heat exchanger 260 in the refrigerant pump unit 210 circuit will not operate, which will also increase the fan resistance. That is, in a parallel system, when only one of the refrigerant pump unit 210 circuit or the compressor unit 220 circuit is turned on, the heat exchanger in the other circuit is not utilized, resulting in a decrease in the overall energy efficiency ratio of the air conditioning unit. To address the above problems, this application provides an air conditioning unit and its control method to improve the shortcomings of both series and parallel systems and enhance the energy efficiency ratio of the air conditioning unit.

[0061] like Figure 3 and Figure 4As shown, according to an embodiment of this application, an air conditioning unit is proposed. The air conditioning unit includes a first refrigerant circulation loop and a second refrigerant circulation loop. The first refrigerant circulation loop includes a refrigerant pump 130, a first heat exchanger 112, a second heat exchanger 113, and a liquid receiver 128 connected in sequence. The second refrigerant circulation loop includes a compressor 129, a third heat exchanger 114, a throttling assembly, and a fourth heat exchanger 115 connected in sequence. The second heat exchanger 113 includes a first end connected to the liquid receiver 128 and a second end connected to the first heat exchanger 112. The third heat exchanger 114 includes a first end connected to the throttling assembly and a second end connected to the compressor 129. The first ends of the second heat exchanger 113 and the third heat exchanger 114 are connected through a first refrigerant branch. The first refrigerant branch includes a first valve body 116 for controlling the on / off state of the first refrigerant branch. The second end of the second heat exchanger 113 is connected to the second end of the third heat exchanger 114 via a second refrigerant branch, which includes a second valve body 117 for controlling the on / off state of the second refrigerant branch. The first heat exchanger 112 includes a first end connected to the refrigerant pump 130 and a second end connected to the second heat exchanger 113. The fourth heat exchanger 115 includes a first end connected to the throttling assembly and a second end connected to the compressor 129. The first end of the first heat exchanger 112 is connected to the first end of the fourth heat exchanger 115 via a third refrigerant branch, which includes a third valve body 118 for controlling the on / off state of the third refrigerant branch. The second end of the third heat exchanger 114 is connected to the second end of the fourth heat exchanger 115 via a fourth refrigerant branch, which includes a fourth valve body 119 for controlling the on / off state of the fourth refrigerant branch.

[0062] In the air conditioning unit provided in this application, the first refrigerant circulation loop and the second refrigerant circulation loop can be connected in parallel and activated simultaneously, or the first refrigerant circulation loop and the second refrigerant circulation loop can be activated separately. When only the first refrigerant circulation loop is running, the first refrigerant branch, the second refrigerant branch, the third refrigerant branch, and the fourth refrigerant branch can all be opened to connect the third heat exchanger 114 and the fourth heat exchanger 115 into the first refrigerant circulation loop. This achieves the parallel connection of the third heat exchanger 114 and the second heat exchanger 113, as well as the parallel connection of the first heat exchanger 112 and the fourth heat exchanger 115. As a result, in the first refrigerant circulation loop mode, the third heat exchanger 114 and the fourth heat exchanger 115 are not idle, thereby improving the utilization rate of the third heat exchanger 114 and the fourth heat exchanger 115, and thus improving the energy efficiency ratio of the air conditioning unit. When only the second refrigerant circulation loop is running, the first, second, third, and fourth refrigerant branches can all be opened to connect the first heat exchanger 112 and the second heat exchanger 113 into the second refrigerant circulation loop. This enables the second heat exchanger 113 to be connected in parallel with the third heat exchanger 114 and the first heat exchanger 112 to be connected in parallel with the fourth heat exchanger 115. As a result, in the second refrigerant circulation loop mode, the first heat exchanger 112 and the second heat exchanger 113 are not idle, thereby improving their utilization rate and thus increasing the energy efficiency ratio of the air conditioning unit. When the first refrigerant circulation loop and the second refrigerant circulation loop are running simultaneously, the first refrigerant branch, the second refrigerant branch, the third refrigerant branch, and the fourth refrigerant branch can all be shut down. This allows the first and second refrigerant circulation loops to operate independently in parallel. Parallel operation is suitable for temperatures between 10°C and 30°C. Only opening the first refrigerant circulation loop is suitable for temperatures below 10°C. This makes the application range of the refrigerant pump 130 below 30°C. In contrast, in the prior art, the air conditioning unit with the refrigerant pump 130 and the compressor 129 connected in series only turns on the refrigerant pump 130 when the temperature is below 10°C. Therefore, the air conditioning unit provided in this application has a wider application range for the refrigerant pump 130, resulting in a higher energy efficiency of the air conditioning unit.

[0063] The air conditioning unit provided in this application can broaden the application range of the refrigerant pump 130 while avoiding the increase in fan energy consumption caused by the partial idleness of the first heat exchanger 112, the second heat exchanger 113, the third heat exchanger 114 and the fourth heat exchanger 115, thereby effectively improving the energy efficiency ratio of the air conditioning unit.

[0064] In the air conditioning unit provided in this application, when the compressor 129 or the refrigerant pump 130 is turned on alone, only one refrigeration channel is opened in the system. However, by controlling the opening of the first valve body 116, the second valve body 117, the third valve body 118, and the fourth valve body 119, the first refrigerant branch, the second refrigerant branch, the third refrigerant branch, and the fourth refrigerant branch can all be opened, thereby allowing the first heat exchanger 112, the second heat exchanger 113, the third heat exchanger 114, and the fourth heat exchanger 115 to be effectively utilized. When the compressor 129 and the refrigerant pump 130 are turned on simultaneously, by controlling the closing of the first valve body 116, the second valve body 117, the third valve body 118, and the fourth valve body 119, the first refrigerant branch, the second refrigerant branch, the third refrigerant branch, and the fourth refrigerant branch can all be closed, thereby allowing the first refrigerant circulation loop and the second refrigerant circulation loop to operate independently in parallel mode.

[0065] Specifically, the case of opening the first refrigerant circulation loop and connecting the third heat exchanger 114 and the fourth heat exchanger 115 into the first refrigerant circulation loop is suitable for temperatures below 10°C; the case of opening the second refrigerant circulation loop and connecting the first heat exchanger 112 and the second heat exchanger 113 into the second refrigerant circulation loop is suitable for temperatures above 30°C; the case of connecting the first refrigerant circulation loop and the second refrigerant circulation loop in parallel is suitable for temperatures between 10°C and 30°C.

[0066] In the above embodiments, adjacent units of the refrigerant pump 130, the first heat exchanger 112, the second heat exchanger 113, and the liquid receiver 128 are connected via refrigerant pipelines. Adjacent units of the compressor 129, the third heat exchanger 114, the throttling assembly, and the fourth heat exchanger 115 are also connected via refrigerant pipelines. The air conditioning unit provided in this application can be used to cool data centers and features long utilization time of natural cooling sources and high energy efficiency.

[0067] Specifically, both the first refrigerant circulation loop and the second refrigerant circulation loop are equipped with refrigerant, which may include a refrigerant.

[0068] In one feasible implementation, such as Figure 3 and Figure 4As shown, a fifth valve body 120 is provided between the first end of the second heat exchanger 113 and the liquid receiver 128, and a sixth valve body 121 is provided between the second end of the second heat exchanger 113 and the first heat exchanger 112. A seventh valve body 122 is provided between the first end of the third heat exchanger 114 and the throttling assembly, and an eighth valve body 123 is provided between the second end of the third heat exchanger 114 and the compressor 129. A ninth valve body 124 is provided between the first end of the first heat exchanger 112 and the refrigerant pump 130, and a tenth valve body 125 is provided between the second end of the first heat exchanger 112 and the second heat exchanger 113. An eleventh valve body 126 is provided between the first end of the third heat exchanger 114 and the throttling assembly, and a twelfth valve body 127 is provided between the second end of the third heat exchanger 114 and the compressor 129.

[0069] In the above embodiment, when only the first refrigerant circulation loop is running, the fifth valve body 120, the sixth valve body 121, the ninth valve body 124, and the tenth valve body 125 must be kept open, while the seventh valve body 122, the eighth valve body 123, the eleventh valve body 126, and the twelfth valve body 127 must be kept closed. Simultaneously, the first valve body 116, the second valve body 117, the third valve body 118, and the fourth valve body 119 must be kept open.

[0070] When operating only the second refrigerant circulation loop, valves 122, 123, 126, and 127 must be kept open, while valves 120, 121, 124, and 125 must be kept closed. Simultaneously, valves 116, 117, 118, and 119 must be kept open.

[0071] When the first refrigerant circulation loop and the second refrigerant circulation loop are running simultaneously, the fifth valve body 120, the sixth valve body 121, the ninth valve body 124, and the tenth valve body 125 remain open, and the seventh valve body 122, the eighth valve body 123, the eleventh valve body 126, and the twelfth valve body 127 remain open. At the same time, the first valve body 116, the second valve body 117, the third valve body 118, and the fourth valve body 119 remain closed.

[0072] By setting the fifth valve body 120, the sixth valve body 121, the seventh valve body 122, the eighth valve body 123, the ninth valve body 124, the tenth valve body 125, the eleventh valve body 126, and the twelfth valve body 127, it can be used to control whether the first heat exchanger 112, the second heat exchanger 113, the third heat exchanger 114, and the fourth heat exchanger 115 are connected to the first refrigerant circulation loop and the second refrigerant circulation loop. By setting the first valve body 116, the second valve body 117, the third valve body 118, and the fourth valve body 119, it can be used to control whether the first heat exchanger 112 and the fourth heat exchanger 115 are connected in parallel and whether the second heat exchanger 113 and the third heat exchanger 114 are connected in parallel.

[0073] In one feasible implementation, such as Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the air conditioning unit includes: a first mode, a second mode, and a third mode, wherein: as Figure 3 and Figure 5 As shown, the first mode includes: the ninth valve body 124, the tenth valve body 125, the sixth valve body 121, and the fifth valve body 120 being in the open state to open the first refrigerant circulation loop; the eighth valve body 123, the seventh valve body 122, the eleventh valve body 126, and the twelfth valve body 127 being in the closed state to keep the second refrigerant circulation loop closed; the first valve body 116 and the second valve body 117 being in the open state to connect the third heat exchanger 114 to the first refrigerant circulation loop; and the third valve body 118 and the fourth valve body 119 being in the open state to connect the fourth heat exchanger 115 to the first refrigerant circulation loop.

[0074] In this mode, the first refrigerant circulation loop is turned on and the second refrigerant circulation loop is turned off. The third heat exchanger 114 and the fourth heat exchanger 115 in the second refrigerant circulation loop are connected in parallel to the first refrigerant circulation loop, thereby avoiding the problem of low utilization caused by the third heat exchanger 114 and the fourth heat exchanger 115 being idle when the first refrigerant circulation loop is running.

[0075] In the air conditioning unit provided in this application, when cooling the data center computer room and the temperature is low (<10℃), the first mode is operated. At this time, the refrigerant pump 130 is turned on and the compressor 129 is turned off. The refrigerant in the first heat exchanger 112 and the fourth heat exchanger 115 absorbs the heat of the airflow in the second cavity 136 and evaporates and vaporizes. It then passes through the tenth valve body 125 and the fourth valve body 119 in sequence, and then through the sixth valve body 121 and the second valve body 117 to enter the second heat exchanger 113 and the third heat exchanger 114 to release heat. After that, it enters the liquid receiver 128 through the first valve body 116 and the fifth valve body, and then enters the refrigerant pump 130 for pressurization. Finally, it returns to the first heat exchanger 112 and the fourth heat exchanger 115 through the ninth valve body 124 and the third valve body 118, and so on.

[0076] like Figure 3 and Figure 6As shown, the second mode includes: the eighth valve body 123, the seventh valve body 122, the eleventh valve body 126, and the twelfth valve body 127 being in the open state to open the second refrigerant circulation loop; the ninth valve body 124, the tenth valve body 125, the sixth valve body 121, and the fifth valve body 120 being in the closed state to keep the first refrigerant circulation loop closed; the first valve body 116 and the second valve body 117 being in the open state to connect the second heat exchanger 113 to the second refrigerant circulation loop; and the third valve body 118 and the fourth valve body 119 being in the open state to connect the first heat exchanger 112 to the second refrigerant circulation loop.

[0077] In this mode, the first refrigerant circulation loop is closed, and the second refrigerant circulation loop is open. The second heat exchanger 113 and the first heat exchanger 112 in the first refrigerant circulation loop are connected in parallel to the second refrigerant circulation loop, thus avoiding the problem of low utilization caused by the first heat exchanger 112 and the second heat exchanger 113 being idle when the second refrigerant circulation loop is running. This mode is suitable for temperatures above 30°C.

[0078] In the air conditioning unit provided in this application, when cooling the data center computer room and the temperature is high (t>30℃), the second mode is operated. At this time, the refrigerant pump 130 is turned off and the compressor 129 is turned on. The refrigerant in the first heat exchanger 112 and the fourth heat exchanger 115 absorbs heat from the gas in the second cavity 136 and evaporates and vaporizes. It then passes through the fourth valve body 119 and the twelfth valve body 127 in sequence, and then through the eighth valve body 123 and the second valve body 117 to the second heat exchanger 113 and the third heat exchanger 114 to release heat. After that, it enters the throttling assembly through the first valve body 116 and the seventh valve body 122 to reduce pressure. Finally, it returns to the fourth heat exchanger 115 and the second heat exchanger 113 through the eleventh valve body 126 and the third valve body 118, and so on.

[0079] like Figure 3 and Figure 7 As shown, the third mode includes: the ninth valve body 124, the tenth valve body 125, the sixth valve body 121 and the fifth valve body 120 being in the open state to open the first refrigerant circulation loop; the eighth valve body 123, the seventh valve body 122, the eleventh valve body 126 and the twelfth valve body 127 being in the open state to open the second refrigerant circulation loop; and the first valve body 116, the second valve body 117, the third valve body 118 and the fourth valve body 119 being in the closed state to make the first refrigerant circulation loop and the second refrigerant circulation loop independent of each other.

[0080] In this mode, both the first and second refrigerant circulation loops are activated, operating independently in parallel. This mode is suitable for temperatures ranging from 10°C to 30°C. The refrigerant pump 130 operates in both the first and third modes, thereby increasing its operating time and utilization rate.

[0081] In the air conditioning unit provided in this application, when cooling a data center computer room and the temperature is within the medium temperature range (10℃≤t≤30℃), the third mode is operated. In this mode, both the refrigerant pump 130 and the compressor 129 are turned on. The gas in the second cavity 136 first exchanges heat with the first heat exchanger 112 for cooling, and then exchanges heat with the fourth heat exchanger 115 for cooling. The insufficient cooling capacity in the first refrigerant circulation loop is supplemented by the second refrigerant circulation loop. The gas in the first cavity 111 first exchanges heat with the second heat exchanger 113 to remove its heat, and then exchanges heat with the third heat exchanger 114 to remove its heat.

[0082] The control method for the air conditioning unit provided in this application utilizes three modes to allow the unit to leverage both the advantages of a series connection between the refrigerant pump 130 and the compressor 129, and the advantages of a parallel connection between them. This mitigates the drawbacks of both series and parallel connections. Compared to the traditional series system of the refrigerant pump 130 and compressor 129, the addition of a third mode allows the refrigerant pump 130 to continue operating even when its cooling capacity is insufficient, thus expanding its application range. The compressor 129 is then used for supplemental cooling, improving the energy efficiency ratio. Compared to a system where the refrigerant pump 130 and compressor 129 are connected in parallel, when compressor 129 or refrigerant pump 130 is turned on alone, the first heat exchanger 112, the second heat exchanger 113, the third heat exchanger 114 and the fourth heat exchanger 115 can all be utilized through valve control, reducing the number of idle heat exchangers in the system and thus reducing useless air resistance. This control method of the air conditioning unit can effectively improve the energy efficiency ratio of the air conditioning unit under various temperature conditions.

[0083] In one feasible implementation, such as Figure 3 and Figure 8 As shown, the air conditioning unit includes an indoor unit 144 and an outdoor unit 143. The outdoor unit 143 includes an outdoor unit housing 110, and the outdoor unit housing 110 includes a first cavity 111. A second heat exchanger 113 and a third heat exchanger 114 are located in the first cavity 111. The indoor unit 144 includes an indoor unit housing 135, and a second cavity 136 is formed in the indoor unit housing 135. A first heat exchanger 112 and a fourth heat exchanger 115 are located in the second cavity 136.

[0084] Specifically, the outdoor unit 143 is connected to the outside, while the indoor unit 144 can be located indoors to regulate the indoor temperature. The outdoor unit 143 includes an outdoor unit housing 110, within which a first cavity 111 is formed. A second heat exchanger 113 and a third heat exchanger 114 are disposed within the first cavity 111. When the air conditioning unit is used for cooling, the second heat exchanger 113 and the third heat exchanger 114 can function as condensers to cool the refrigerant inside. When the air conditioning unit is used for heating, the second heat exchanger 113 and the third heat exchanger 114 can function as evaporators. The indoor unit 144 includes an indoor unit housing 135, within which a second cavity 136 is formed. A first heat exchanger 112 and a fourth heat exchanger 115 are disposed within the second cavity 136. When the air conditioning unit is used for cooling, the first heat exchanger 112 and the second heat exchanger 113 can be used as evaporators to evaporate the refrigerant inside, thereby cooling the gas within the second cavity 136. When the air conditioning unit is used for heating, the first heat exchanger 112 and the fourth heat exchanger 115 can be used as condensers.

[0085] In one feasible implementation, such as Figure 3 and Figure 8 As shown, the outdoor unit 143 also includes an air duct 131 and an exhaust port 132 communicating with the first cavity 111. The air duct 131 includes a first air duct 1311, which includes a first air inlet 1312 and a first filter 1313. The first filter 1313 is disposed at the first air inlet 1312 and is used to filter the gas entering the first cavity 111 from the first air inlet 1312.

[0086] Specifically, both the air duct 131 and the exhaust port 132 are connected to the first cavity 111. The air duct 131 is used to allow gas to enter the first cavity 111, and the exhaust port 132 is used to allow gas to flow out of the first cavity 111. The gas entering the first cavity 111 through the air duct 131 can exchange heat with the second heat exchanger 113 and / or the third heat exchanger 114. The second heat exchanger 113 and the third heat exchanger 114 are arranged side by side to form the first heat exchanger 112 assembly. The air duct 131 and the exhaust port 132 are located on both sides of the first heat exchanger 112 assembly, so that the gas entering the first cavity 111 through the air duct 131 can pass through the second heat exchanger 113 and / or the third heat exchanger 114 and exchange heat with the second heat exchanger 113 and / or the third heat exchanger 114 before being discharged through the exhaust port 132.

[0087] In the above embodiment, the air duct 131 includes a first air duct 1311, including a first air inlet 1312 and a first filter 1313. The first air inlet 1312 is used to supply gas into the first cavity 111. The first filter 1313 is disposed at the first air inlet 1312 and is used to filter the gas entering the first cavity 111 from the first air inlet 1312, so as to improve the service life of the air conditioning unit.

[0088] In one feasible implementation, such as Figure 3 and Figure 8 As shown, the first air duct 1311 also includes a wet membrane 1314, which is disposed on the side of the first filter 1313 away from the first air inlet 1312. The wet membrane 1314 is used to cool the gas entering the first cavity 111 from the first air inlet 1312.

[0089] In the above embodiments, the wet film 1314 is used to pre-cool the gas entering the first cavity 111 from the first air inlet 1312, which can improve the cooling effect on the second heat exchanger 113 and / or the third heat exchanger 114 and reduce the condensation temperature and condensation pressure.

[0090] Specifically, the wet film 1314 is a moist film that can be used to cool the gas.

[0091] In one feasible implementation, such as Figure 3 and Figure 8 As shown, the first air duct 1311 also includes a first air valve (not shown in the figure), which is used to control the opening or closing of the first air inlet 1312. The first air valve is located at the first air inlet 1312 and is used to control whether gas can enter the first cavity 111 through the first air inlet 1312.

[0092] Specifically, the first air duct 1311 may not include the first air valve in order to simplify the structure of the air conditioning unit and reduce manufacturing costs.

[0093] In one feasible implementation, such as Figure 3 and Figure 8 As shown, the outdoor unit 143 also includes a cooling component 133, which includes a water distribution device 1331 and a water supply device. The water distribution device 1331 is disposed around at least a portion of the wet film 1314. The water distribution device 1331 is connected to the water supply device, which is used to supply water to the water distribution device 1331.

[0094] In the above embodiment, the outdoor unit 143 further includes a cooling component 133, which can be used to cool the second heat exchanger 113 and the third heat exchanger 114. The cooling component 133 includes a water distribution device 1331 for replenishing water to the wet film 1314, and a water supply device for supplying water to the water distribution device 1331. The water distribution device 1331 is used to replenish water to the wet film 1314 to keep the wet film 1314 at a low temperature.

[0095] In the above embodiments, the water distribution device 1331 may include a nozzle, which may be arranged around a portion of the wet film 1314. Specifically, the nozzle may be located above the wet film 1314, and the sprayed water permeates the wet film 1314 under the action of gravity, so that the wet film 1314 remains wet as a whole.

[0096] In one feasible implementation, such as Figure 3 and Figure 8 As shown, the water supply device includes a water tank 1334 and a water pump 1335. The water distribution device 1331 is connected to the water pump 1335, and the water pump 1335 is connected to the water tank 1334. The water pump 1335 is used to supply water from the water tank 1334 to the water distribution device 1331.

[0097] In the above embodiment, the water supply device includes a water pump 1335 and a water tank 1334 connected by a water pipe. The water pump 1335 supplies water from the water tank 1334 to the water distribution device 1331, which then supplies water to the wet membrane 1314.

[0098] In one feasible implementation, such as Figure 3 and Figure 8 As shown, the cooling component 133 also includes a water return device, which includes a water collection tray 1332 and a water collection pipe 1333. The water collection tray 1332 is located below the wet film 1314 and is used to collect water dripping from the wet film 1314. The water collection pipe 1333 is connected to the water collection tray 1332 and the water tank 1334 respectively.

[0099] In the above embodiments, the cooling component 133 further includes a water return device, which includes a water collection tray 1332 and a water collection pipe 1333. The water collection tray 1332 is located below the wet film 1314 and is used to collect water dripping from the wet film 1314. The water collection pipe 1333 is connected to the water collection tray 1332 and the water tank 1334 respectively and is used to transport the water in the water collection tray 1332 to the water tank 1334.

[0100] In the above embodiment, the wet membrane 1314 is a moist film that can be used to cool the gas. The water in the wet membrane 1314 can originate from the cooling component 133, that is, the cooling component 133 supplies water to the wet membrane 1314 to keep the wet membrane 1314 moist and at a low temperature. The cooling component 133 is connected to the wet membrane 1314. In the cooling component 133, the water distribution device 1331 is connected to the water pump 1335. The water pump 1335 is used to supply water from the water tank 1334 to the water distribution device 1331. The water distribution device 1331 supplies water to the wet membrane 1314. A water collection tray 1332 is provided below the wet membrane 1314 to collect water dripping from the wet membrane 1314. The water collection tray 1332 is connected to the water tank 1334 through the water collection pipe 1333. The water in the water collection tray 1332 enters the water tank 1334 through the water collection pipe 1333. The water in the water tank 1334 is then supplied to the water distribution device 1331 through the water pump 1335, thereby completing the water circulation and effectively improving the water utilization rate.

[0101] In one feasible implementation, such as Figure 3 and Figure 8 As shown, the air duct 131 includes a second air duct 1315, which includes a second air valve, a second air inlet, and a second filter. The second air valve is used to control the opening or closing of the second air inlet, and the second filter is located at the second air inlet to filter the gas entering the first cavity 111 from the second air inlet.

[0102] In the above embodiments, the air duct 131 may further include a second air duct 1315. The second air duct 1315 does not include the wet film 1314, and includes a second air valve, a second air inlet, and a second filter. The second air valve is used to control whether gas can enter the first cavity 111 through the second air inlet. The second filter is disposed at the second air inlet and is used to filter the gas entering the first cavity 111 through the second air inlet to improve the service life of the air conditioning unit.

[0103] In one feasible implementation, such as Figure 3 and Figure 8 As shown, the air duct 131 includes a first air duct 1311 and a second air duct 1315. There are two first air ducts 1311, and the two first air ducts 1311 are arranged opposite to each other. There are two second air ducts 1315, and the two second air ducts 1315 are arranged opposite to each other.

[0104] The two first air ducts 1311 are set opposite each other, and the two second air ducts 1315 are set opposite each other, so as to facilitate the flow of gas when the first air duct 1311 is mainly used or when only the second air duct 1315 is used.

[0105] In the above embodiment, the outdoor unit 143 adopts four air ducts 131, of which two first air ducts 1311 include wet films 1314, which can pre-cool the fresh air entering the first cavity 111 through the wet films 1314 during the high-temperature season; the two second air ducts 1315 are not equipped with wet films 1314. When the wet films 1314 are not needed during the low-temperature season, the second air valves in the second air ducts 1315 can be opened. Since the two first air ducts 1311 are equipped with wet films 1314, the resistance to air is relatively large. Therefore, the amount of fresh air passing through the wet films 1314 is very small or does not pass through the wet films 1314. It only passes through the second air ducts 1315 into the first cavity 111, thereby reducing the resistance of air entering the first cavity 111 and reducing the power consumption of the air conditioning unit.

[0106] In the above embodiment, the first air duct 1311 includes a wet film 1314, which can improve the cooling effect on the refrigerant in the second heat exchanger 113 and the third heat exchanger 114, thereby allowing the first air duct 1311 to be opened when a higher cooling intensity is required. The second air duct 1315 is provided with a second air valve, which can be closed when the first air duct 1311 is opened, thereby closing the second air duct 1315, or the first air duct 1311 and the second air duct 1315 can be opened simultaneously. When a lower cooling intensity is required, the second air valve can be opened, allowing gas to mainly enter the first cavity 111 through the second air duct 1315, avoiding an increase in fan power due to the high air resistance of the wet film 1314, thereby reducing the power consumption of the air conditioning unit.

[0107] In one feasible implementation, such as Figure 3 and Figure 9 As shown, the outdoor unit 143 also includes an outdoor axial flow fan 134, which is located in the first cavity 111.

[0108] In the above embodiment, the outdoor axial flow fan 134 can be located near the air outlet. The outdoor axial flow fan can be used to maintain negative pressure in the first cavity 111 to facilitate gas flow.

[0109] In the above embodiments, when the outdoor unit 143 includes a first air duct 1311 and a second air duct 1315, when the wet membrane 1314 is not needed during low-temperature seasons, the second air valve in the second air duct 1315 can be opened. Outdoor fresh air, under the action of the outdoor axial flow fan 134, enters the first cavity 111 from the second air inlet. After being filtered by the second filter, it exchanges heat with the second heat exchanger 113 and the third heat exchanger 114, carrying away the heat of the refrigerant in the second and third heat exchangers 113 and then exiting the first cavity 111 from the air outlet. Because the two first air ducts 1311 are equipped with wet membranes 1314, which have significant resistance to the gas, the amount of fresh air passing through the wet membranes 1314 is very small or does not pass through them at all. It can enter the first cavity 111 only through the second air duct 1315, thereby reducing the resistance of the outdoor axial flow fan 134 and reducing its power consumption. When the wet membrane 1314 is opened during the high-temperature season, the second air valve in the second air duct 1315 is closed. Outdoor fresh air enters the first cavity 111 from the first air inlet 1312 under the action of the outdoor axial flow fan 134. After being filtered by the first filter 1313 and cooled by the wet membrane 1314, it exchanges heat with the second heat exchanger 113 and the third heat exchanger 114, and after taking away its heat, it is discharged from the first cavity 111 from the air outlet, thus completing the cooling of the second heat exchanger 113 and the third heat exchanger 114.

[0110] In one feasible implementation, such as Figure 3 , Figure 8 and Figure 9 As shown, the liquid receiver 128, compressor 129 and refrigerant pump 130 are located in the first cavity 111, and the throttling assembly is located in the second cavity 136.

[0111] Specifically, the throttling component includes an electronic expansion valve 137 for throttling and depressurizing the refrigerant.

[0112] Among them, compressor 129 and refrigerant pump 130 are two types of temperature control devices. Refrigerant pump 130 is suitable for low-temperature environments, compressor 129 is suitable for high-temperature environments, and liquid receiver 128 is used to store refrigerant.

[0113] In one feasible implementation, such as Figure 3 and Figure 9 As shown, the indoor unit 144 also includes a return air vent 138 and a supply air vent 139 that communicate with the second cavity 136. The indoor unit 144 also includes a third filter 140, which is disposed at the return air vent 138 and is used to filter the gas entering the second cavity 136 from the return air vent 138.

[0114] In the above embodiment, the indoor unit 144 further includes a return air vent 138 and an air supply vent 139 communicating with the second cavity 136. The return air vent 138 is a channel for gas to enter the second cavity 136 from outside, and the air supply vent 139 is a channel for gas to flow out of the second cavity 136. Gas enters the second cavity 136 through the return air vent 138, undergoes heat exchange within the second cavity 136, and then flows out of the second cavity 136. The first heat exchanger 112 and the fourth heat exchanger 115 are arranged side by side to form the second heat exchanger 113 assembly. The return air vent 138 and the air supply vent 139 are located on both sides of the second heat exchanger 113 assembly, so that the gas entering the second cavity 136 from the return air vent 138 can pass through the second heat exchanger 113 assembly, undergo heat exchange, and then be discharged through the air supply vent 139.

[0115] In the above embodiment, the indoor unit 144 includes a third filter 140, which has a stronger filtration effect than the first filter 1313 and the second filter. Since the third filter 140 is located in the indoor unit 144, which is located indoors, it has higher requirements for gas cleanliness in order to maintain indoor cleanliness and extend the service life of the indoor unit 144.

[0116] In the above embodiment, indoor air, under the action of indoor axial flow fan 141, enters the second cavity 136 from return air vent 138, is first filtered by third filter 140, then undergoes heat exchange through first heat exchanger 112 and fourth heat exchanger 115, and is then delivered into the room from air supply vent 139. Indoor unit 144 can be connected to the data center server room for cooling the data center.

[0117] In one feasible implementation, such as Figure 3 and Figure 9 As shown, the indoor unit 144 includes an indoor axial flow fan 141, which is located in the second cavity 136.

[0118] In the above embodiment, the indoor axial flow fan 141 can be located near the air outlet 139. The indoor axial flow fan can be used to maintain negative pressure in the second cavity 136 to facilitate gas flow.

[0119] In one feasible implementation, such as Figure 3 and Figure 9As shown, the indoor unit 144 also includes a return air vent 138 and a supply air vent 139 communicating with the second cavity 136. The supply air vent 139 is located below the return air vent 138. The indoor unit 144 also includes a baffle assembly 142. The baffle assembly 142 includes a first baffle 1421. The first baffle 1421 is disposed opposite to the return air vent 138. The first baffle 1421 has a first surface near the return air vent 138. The first surface includes a first end near the return air vent 138 and a second end away from the return air vent 138. The second end is located on the side of the first end near the supply air vent 139.

[0120] In the above embodiment, the outdoor unit 143 adopts a bottom-supply and top-return method, which effectively matches the airflow organization of the underfloor air supply commonly used in data center computer rooms. A first guide plate 1421 is provided in the second cavity 136. The first guide plate 1421 can be used to guide the gas entering the second cavity 136 from the return air port 138, which can effectively reduce the friction resistance of the gas entering the second cavity 136 and reduce the energy consumption of the indoor axial fan 141.

[0121] In one feasible implementation, such as Figure 3 and Figure 6 As shown, the indoor unit 144 also includes a return air vent 138 and a supply air vent 139 communicating with the second cavity 136. The supply air vent 139 is located below the return air vent 138. The indoor unit 144 also includes a baffle assembly 142. The baffle assembly 142 includes a second baffle 1422. The second baffle 1422 is disposed opposite to the supply air vent 139. The second baffle 1422 has a second surface near the supply air vent 139. The second surface includes a first end near the supply air vent 139 and a second end away from the supply air vent 139. The second end is located on the side of the first end near the return air vent 138.

[0122] In the above embodiments, the guide plate assembly 142 further includes a second guide plate 1422. The second guide plate 1422 can be used to guide the gas flowing out of the second cavity 136 from the air outlet 139, which can effectively reduce the friction resistance along the gas flow out of the second cavity 136 and reduce the energy consumption of the indoor axial fan 141.

[0123] In one feasible implementation, such as Figure 3 and Figure 9 As shown, the deflector assembly 142 includes one of a first deflector 1421 and a second deflector 1422, or both a first deflector 1421 and a second deflector 1422. When both a first deflector 1421 and a second deflector 1422 are included, the airflow guidance effect is better.

[0124] In one feasible implementation, the first surface is a first arc surface, which is recessed on the side away from the return air inlet 138, and the second surface is a second arc surface, which is recessed on the side away from the supply air inlet 139.

[0125] In the above embodiments, the first surface is a first arc surface and the second surface is a second arc surface, and the concave directions of the first arc surface and the second arc surface are adapted to the airflow direction, thereby providing a good guiding effect for the airflow.

[0126] Specifically, the first and second surfaces can also be planar for ease of fabrication.

[0127] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air conditioning unit, characterized in that, include: The first refrigerant circulation loop includes a refrigerant pump, a first heat exchanger, a second heat exchanger, and a liquid receiver connected in sequence from beginning to end. The second refrigerant circulation loop includes a compressor, a third heat exchanger, a throttling component, and a fourth heat exchanger connected in sequence. The second heat exchanger includes a first end connected to the liquid receiver and a second end connected to the first heat exchanger. The third heat exchanger includes a first end connected to the throttling assembly and a second end connected to the compressor. The first end of the second heat exchanger and the first end of the third heat exchanger are connected through a first refrigerant branch, which includes a first valve body for controlling the on / off state of the first refrigerant branch. The second end of the second heat exchanger and the second end of the third heat exchanger are connected through a second refrigerant branch, which includes a second valve body for controlling the on / off state of the second refrigerant branch. The first heat exchanger includes a first end connected to the refrigerant pump and a second end connected to the second heat exchanger; the fourth heat exchanger includes a first end connected to the throttling assembly and a second end connected to the compressor; the first end of the first heat exchanger and the first end of the fourth heat exchanger are connected through a third refrigerant branch, the third refrigerant branch including a third valve body for controlling the on / off state of the third refrigerant branch; the second end of the third heat exchanger and the second end of the fourth heat exchanger are connected through a fourth refrigerant branch, the fourth refrigerant branch including a fourth valve body for controlling the on / off state of the fourth refrigerant branch. A fifth valve body is provided between the first end of the second heat exchanger and the liquid reservoir, and a sixth valve body is provided between the second end of the second heat exchanger and the first heat exchanger. A seventh valve body is provided between the first end of the third heat exchanger and the throttling assembly, and an eighth valve body is provided between the second end of the third heat exchanger and the compressor. A ninth valve body is provided between the first end of the first heat exchanger and the fluorine pump, and a tenth valve body is provided between the second end of the first heat exchanger and the second heat exchanger. An eleventh valve body is provided between the first end of the third heat exchanger and the throttling assembly, and a twelfth valve body is provided between the second end of the third heat exchanger and the compressor.

2. The air conditioning unit according to claim 1, characterized in that, The air conditioning unit includes: a first mode, a second mode, and a third mode, wherein: The first mode includes: The ninth valve, the tenth valve, the sixth valve, and the fifth valve are in the open state to open the first refrigerant circulation loop, while the eighth valve, the seventh valve, the eleventh valve, and the twelfth valve are in the closed state to keep the second refrigerant circulation loop closed. The first valve body and the second valve body are in the open state, so that the third heat exchanger is connected to the first refrigerant circulation loop; The third valve body and the fourth valve body are in the open state, so that the fourth heat exchanger is connected to the first refrigerant circulation loop; The second mode includes: The eighth valve body, the seventh valve body, the eleventh valve body, and the twelfth valve body are in the open state to open the second refrigerant circulation loop, and the ninth valve body, the tenth valve body, the sixth valve body, and the fifth valve body are in the closed state to keep the first refrigerant circulation loop closed. The first valve body and the second valve body are in the open state, so that the second heat exchanger is connected to the second refrigerant circulation loop; The third valve body and the fourth valve body are in the open state so that the first heat exchanger is connected to the second refrigerant circulation loop; The third mode includes: The ninth valve body, the tenth valve body, the sixth valve body, and the fifth valve body are in the open state to open the first refrigerant circulation loop; The eighth valve body, the seventh valve body, the eleventh valve body and the twelfth valve body are in the open state to open the second refrigerant circulation loop; The first valve body, the second valve body, the third valve body, and the fourth valve body are in a closed state, so that the first refrigerant circulation loop and the second refrigerant circulation loop are independent of each other.

3. The air conditioning unit according to claim 1, characterized in that, The air conditioning unit includes an indoor unit and an outdoor unit. The outdoor unit includes an outdoor unit housing, and the outdoor unit housing includes a first cavity. The second heat exchanger and the third heat exchanger are located in the first cavity. The indoor unit includes an indoor unit housing, and the indoor unit housing has a second cavity formed therein. The first heat exchanger and the fourth heat exchanger are located in the second cavity.

4. The air conditioning unit according to claim 3, characterized in that, The outdoor unit also includes an air duct and an exhaust port that communicate with the first cavity. The air duct includes a first air duct, which includes a first air inlet and a first filter. The first filter is disposed at the first air inlet and is used to filter the gas entering the first cavity from the first air inlet.

5. The air conditioning unit according to claim 4, characterized in that, The first air duct also includes a wet membrane, which is disposed on the side of the first filter opposite to the first air inlet. The wet membrane is used to cool the gas entering the first cavity from the first air inlet.

6. The air conditioning unit according to claim 5, characterized in that, The outdoor unit also includes a cooling component, which includes a water distribution device and a water supply device. The water distribution device is arranged around at least a portion of the wet film, and the water distribution device is connected to the water supply device, which supplies water to the water distribution device.

7. The air conditioning unit according to claim 6, characterized in that, The water supply device includes a water tank and a water pump. The water distribution device is connected to the water pump, and the water pump is connected to the water tank. The water pump is used to supply water from the water tank to the water distribution device.

8. The air conditioning unit according to claim 7, characterized in that, The cooling component also includes a water return device, which includes a water collection tray and a water collection pipe. The water collection tray is located below the wet membrane and is used to collect water dripping from the wet membrane. The water collection pipe is connected to the water collection tray and the water tank, respectively.

9. The air conditioning unit according to claim 4, characterized in that, The first air duct also includes a first air valve, which is used to control the opening or closing of the first air inlet.

10. The air conditioning unit according to any one of claims 4-9, characterized in that, The air duct includes a second air duct, which includes a second air valve, a second air inlet, and a second filter. The second air valve is used to control the opening or closing of the second air inlet, and the second filter is disposed at the second air inlet to filter the gas entering the first cavity through the second air inlet.

11. The air conditioning unit according to claim 10, characterized in that, The air duct includes a first air duct and a second air duct. There are two first air ducts, which are arranged opposite to each other. There are also two second air ducts, which are arranged opposite to each other.

12. The air conditioning unit according to claim 3, characterized in that, The outdoor unit also includes an outdoor axial flow fan, which is located within the first cavity.

13. The air conditioning unit according to claim 3, characterized in that, The liquid reservoir, the compressor, and the fluorine pump are located in the first cavity, and the throttling assembly is located in the second cavity.

14. The air conditioning unit according to claim 3, characterized in that, The indoor unit also includes a return air vent and a supply air vent communicating with the second cavity. The indoor unit also includes a third filter, which is disposed at the return air vent and is used to filter the gas entering the second cavity from the return air vent.

15. The air conditioning unit according to claim 3, characterized in that, The indoor unit includes an indoor axial flow fan, which is located within the second cavity.

16. The air conditioning unit according to claim 3, characterized in that, The indoor unit also includes a return air vent and a supply air vent communicating with the second cavity. The supply air vent is located below the return air vent. The indoor unit also includes a baffle assembly, which includes a first baffle. The first baffle is disposed opposite to the return air vent. The first baffle has a first surface near the return air vent. The first surface includes a first end near the return air vent and a second end away from the return air vent. The second end is located on the side of the first end near the supply air vent.

17. The air conditioning unit according to claim 16, characterized in that, The first surface is a first arc surface, and the first arc surface is recessed on the side away from the return air inlet.

18. The air conditioning unit according to claim 3, characterized in that, The indoor unit also includes a return air vent and a supply air vent communicating with the second cavity. The supply air vent is located below the return air vent. The indoor unit also includes a baffle assembly, which includes a second baffle. The second baffle is disposed opposite to the supply air vent. The second baffle has a second surface near the supply air vent. The second surface includes a first end near the supply air vent and a second end away from the supply air vent. The second end is located on the side of the first end near the return air vent.

19. The air conditioning unit according to claim 18, characterized in that, The second surface is a second arc surface, and the second arc surface is recessed on the side away from the air outlet.

Images