Air conditioning device

Abstract

The invention is suitable for the technical field of machine room air conditioners, and provides an air conditioning device which comprises a refrigeration main loop and a cold storage loop. When the air conditioning device works under the working condition of small thermal load, both the first throttling device and the second throttling device can be opened, so that one part of a refrigerant discharged by a compressor in a refrigerating loop normally circulates between an evaporator and a condenser, and the other part of the refrigerant can circulate into a heat exchange channel in a regenerator; and heat exchange with the cold storage medium is carried out at the main body container to store the cold energy. And meanwhile, by adjusting the opening degree of the first throttling device and the opening degree of the second throttling device, the cooling capacity output of the evaporator can be better matched with the environment thermal load, the temperature of air passing through the evaporator cannot be continuously reduced, the time that the compressor is shut down due to the fact that the air outlet temperature is lower than the target temperature is prolonged, and the starting and stopping frequency of the compressor is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of computer room air conditioners, and particularly relates to an air conditioning device. Background Art

[0002] At present, in order to ensure the normal operation of a data center or other cabinet equipment, an air conditioning device is usually installed on the data center to adjust the temperature inside the data center so that the electrical components inside the data center are always in the best working state. However, when the air conditioning device operates under a relatively small heat load, once the ambient temperature reaches the set value, the compressor will stop working. But as the ambient temperature inside the data center rises, the compressor will start working again, resulting in the problem of frequent start and stop of the compressor when the heat load is relatively small, which seriously affects the service life of the air conditioner. Summary of the Invention

[0003] The purpose of the present invention is to provide an air conditioning device, aiming to solve the technical problem of frequent start and stop of the compressor existing in the existing air conditioning device when the heat load is relatively small.

[0004] The present invention is implemented as follows. An air conditioning device includes:

[0005] A main refrigeration circuit, including a compressor, a condenser, a first throttling device, and an evaporator connected in sequence;

[0006] A cold storage circuit, including a second throttling device and a cold storage device. The inlet of the second throttling device is connected between the condenser and the first throttling device. The outlet of the second throttling device is connected to the inlet of the heat exchange channel of the cold storage device. The outlet of the heat exchange channel of the cold storage device is connected between the evaporator and the compressor.

[0007] In an optional embodiment, the air conditioning device further includes:

[0008] An air outlet circuit, which includes a driving pump and an air outlet component. The inlet of the driving pump is connected to the outlet of the main container of the cold storage device. The outlet of the driving pump is connected to the inlet of the air outlet component. The outlet of the air outlet component is connected to the inlet of the main container of the cold storage device.

[0009] In an optional embodiment, the air outlet component includes a first header, a second header, and at least two heat exchange branch pipes respectively communicating with the first header and the second header. The first header is communicated with the outlet of the driving pump. The second header is communicated with the inlet of the main container of the cold storage device. At least two of the heat exchange branch pipes are both located between the first header and the second header, and the heat exchange branch pipes are spaced apart to form air outlet vents.

[0010] In an alternative embodiment, the air outlet assembly further includes a first temperature sensor fixed on the heat exchange branch pipe and used for detecting the temperature at the air outlet.

[0011] In an alternative embodiment, a first one-way valve is provided at the outlet of the air outlet assembly, and a second one-way valve is provided at the outlet side of the heat exchange channel of the cold storage device.

[0012] In an alternative embodiment, a first air duct and a second air duct are provided in the air-conditioning device. The evaporator is located in the first air duct, the condenser is located in the second air duct, a communication structure is further provided between the first air duct and the second air duct, and a wind valve assembly for adjusting the opening degree of the communication structure is provided at the communication structure.

[0013] In an alternative embodiment, the air-conditioning device at least has a medium-load refrigeration mode. In the medium-load refrigeration mode, the first throttling device and the second throttling device are opened. The first throttling device is used for distributing part of the refrigerant in the main refrigeration circuit to the evaporator for heat exchange; the second throttling device is used for distributing the remaining part of the refrigerant to the heat exchange channel of the cold storage device in the cold storage circuit to exchange heat with the coolant of the main container.

[0014] In an alternative embodiment, the air-conditioning device at least has a low-load refrigeration mode. In the low-load refrigeration mode, the first throttling device and the second throttling device are closed, and the driving pump is used for driving the coolant of the main container to the air outlet assembly for heat exchange.

[0015] In an alternative embodiment, the air-conditioning device at least has a heating mode. In the heating mode, the first throttling device is closed, the second throttling device is opened, and the wind valve assembly is opened; the second throttling device is used for distributing the refrigerant to the heat exchange channel of the cold storage device to exchange heat with the coolant of the main container, and the wind valve assembly is used for distributing part of the air in the second air duct after flowing through the condenser to the first air duct.

[0016] In an alternative embodiment, the air-conditioning device at least has a full-load refrigeration mode, a medium-load refrigeration mode and an anti-condensation mode;

[0017] In the full-load refrigeration mode, the first throttling device is opened, the second throttling device is closed, and the first throttling device is used for distributing all the refrigerant to the evaporator for heat exchange;

[0018] In the medium-load refrigeration mode, the first throttling device and the second throttling device are opened. The first throttling device is used to distribute part of the refrigerant to the evaporator for heat exchange; the second throttling device is used to distribute the remaining part of the refrigerant to the heat exchange channel of the cold storage device to exchange heat with the coolant of the main container.

[0019] In the anti-condensation mode, the air-conditioning device operates in the full-load refrigeration mode or the medium-load refrigeration mode, and the air valve assembly is opened; the air valve assembly is used to distribute part of the air in the second air duct after flowing through the condenser to the first air duct.

[0020] The technical effect of the present invention relative to the prior art is as follows: The compressor, the condenser, the first throttling device and the evaporator are sequentially connected to form a main refrigeration circuit. The second throttling device and the cold storage device form a cold storage circuit, and the inlet of the second throttling device is connected between the condenser and the first throttling device. The outlet of the second throttling device is connected to the inlet of the heat exchange channel of the cold storage device, and the outlet of the heat exchange channel of the cold storage device is connected between the evaporator and the compressor. Compared with the air-conditioning device in the prior art, when the air-conditioning device works under the condition of relatively small heat load, the first throttling device and the second throttling device can be both opened, so that part of the refrigerant discharged by the compressor in the refrigeration circuit circulates normally between the evaporator and the condenser, and the other part can circulate into the heat exchange channel in the cold storage device to exchange heat with the cold storage medium at the main container to store the cold quantity. At the same time, by adjusting the opening degrees of the first throttling device and the second throttling device, the cold quantity output of the evaporator can be made more matched with the ambient heat load, so that the temperature of the air passing through the evaporator will not continue to decrease, and the time for the outlet air temperature to be lower than the target temperature and cause the compressor to stop is prolonged, thereby reducing the starting and stopping frequency of the compressor. In addition, the extra cold quantity in the refrigeration circuit has been transferred to the cold storage medium inside the main container through the internal heat exchange channel in the cold storage device and stored. This part of the cold quantity can be reused when needed, avoiding frequent starting and stopping of the compressor while achieving the energy-saving effect of the air-conditioning device. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments of the present invention or the description of the prior art. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of the air-conditioning device provided by the embodiment of the present invention;

[0023] Figure 2It is a schematic side view structure diagram of the air conditioner device provided by the embodiment of the present invention;

[0024] Figure 3 It is a schematic principle diagram of the air conditioner device provided by the embodiment of the present invention;

[0025] Figure 4 It is a schematic structure diagram of the cold storage device adopted by the embodiment of the present invention;

[0026] Figure 5 It is a schematic structure diagram of the air outlet assembly adopted by the embodiment of the present invention;

[0027] Figure 6 It is a schematic structure diagram of the closed state of the air valve assembly adopted by the embodiment of the present invention;

[0028] Figure 7 It is a schematic structure diagram of the open state of the air valve assembly adopted by the embodiment of the present invention;

[0029] Figure 8 It is a schematic principle diagram of the air conditioner device provided by the embodiment of the present invention in the full-load refrigeration mode;

[0030] Figure 9 It is a schematic principle diagram of the air conditioner device provided by the embodiment of the present invention in the medium-load refrigeration mode;

[0031] Figure 10 It is a schematic principle diagram of the air conditioner device provided by the embodiment of the present invention in the low-load refrigeration mode;

[0032] Figure 11 It is a schematic principle diagram of the air conditioner device provided by the embodiment of the present invention in the heating mode.

[0033] Explanation of reference numerals:

[0034] 1. Housing; 101. First air duct; 102. Second air duct; 103. Cold air outlet; 104. Hot air return port; 105. Condensation inlet; 106. Condensation outlet; 2. Compressor; 3. Evaporator; 4. Condenser; 5. Cold storage device; 501. Main container; 502. Heat exchange channel; 503. Second temperature sensor; 6. Air outlet assembly; 601. First header; 602. Second header; 603. Heat exchange branch pipe; 604. First temperature sensor; 7. Air valve assembly; 701. Main frame; 702. Swing blade; 8. First throttling device; 9. Second throttling device; 10. First one-way valve; 11. Second one-way valve; 12. Driving pump. Detailed implementation manners

[0035] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0038] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0040] Please refer to Figures 1 to 4 As shown, in an embodiment of the present invention, an air conditioning device is provided, which includes a refrigeration main circuit and a cold storage circuit. The refrigeration main circuit includes a compressor 2, a condenser 4, a first throttling device 8, and an evaporator 3 connected in sequence. The cold storage circuit includes a second throttling device 9 and a cold storage device 5. The inlet of the second throttling device 9 is connected between the condenser 4 and the first throttling device 8. The outlet of the second throttling device 9 is connected to the inlet of the heat exchange channel 502 of the cold storage device 5. The outlet of the heat exchange channel 502 of the cold storage device 5 is connected between the evaporator 3 and the compressor 2.

[0041] Specifically, the cold storage device 5 refers to a component or part that can store low-temperature energy. In this embodiment, the cold storage device 5 includes a main container 501 and a heat exchange channel 502. The main container 501 refers to a shell-like part with a certain accommodation space. Heat insulation materials can be provided on the inner wall of the main container 501 to avoid large heat exchange between the main container 501 and the outside, so as to achieve a better cold storage effect. A cold storage medium can be provided in the main container 501. The cold storage medium refers to a substance that can store and release cold. The cold storage medium can be water, eutectic salt, or organic compounds, etc. The heat exchange channel 502 refers to a tubular part with a certain length, and its function is to allow the refrigerant to pass through and exchange heat with the cold storage medium. The heat exchange channel 502 is usually made of a material with good thermal conductivity.

[0042] Both the first throttling device 8 and the second throttling device 9 refer to valve components that can adjust the flow rate of the pipeline at their respective positions. The first throttling device 8 and the second throttling device 9 can both be equipped with electromagnetic control components, and the electromagnetic control components are connected to the controller, and the opening degree of the throttling device door can be controlled through the controller. Among them, both the first throttling device 8 and the second throttling device 9 can adopt components such as expansion valves or capillary tubes.

[0043] The air-conditioning device provided by the embodiment of the present invention forms a main refrigeration circuit by connecting the compressor 2, the condenser 4, the first throttling device 8, and the evaporator 3 in sequence. A cold storage circuit is formed by the second throttling device 9 and the cold storage device 5, and the inlet of the second throttling device 9 is connected between the condenser 4 and the first throttling device 8. The outlet of the second throttling device 9 is connected to the inlet of the heat exchange channel 502 of the cold storage device 5, and the outlet of the heat exchange channel 502 of the cold storage device 5 is connected between the evaporator 3 and the compressor 2. Compared with the air-conditioning devices in the prior art, when the air-conditioning device operates under the condition of relatively small heat load, the first throttling device 8 and the second throttling device 9 can both be opened, so that a part of the refrigerant discharged by the compressor 2 in the refrigeration circuit circulates normally between the evaporator 3 and the condenser 4, and the other part can circulate into the heat exchange channel 502 in the cold storage device 5, and exchange heat with the cold storage medium at the main container 501 to store the cold. At the same time, by adjusting the opening degrees of the first throttling device 8 and the second throttling device 9, the cold output of the evaporator 3 can be made more matched with the environmental heat load, so that the temperature of the air passing through the evaporator 3 will not continue to decrease, extending the time when the compressor 2 stops due to the outlet air temperature being lower than the target temperature, thereby reducing the start-stop frequency of the compressor 2. In addition, the extra cold in the refrigeration circuit is transferred to the cold storage medium inside the main container 501 through the internal heat exchange channel 502 in the cold storage device 5 and stored. This part of the cold can be reused when needed, avoiding frequent start-stop of the compressor 2 and achieving the energy-saving effect of the air-conditioning device at the same time.

[0044] It should be noted that when the air conditioning system operates under a condition with a relatively large heat load, the second throttling device 9 can be completely closed, so that all the refrigerant in the refrigeration circuit passes through the evaporator 3 during operation, making the air conditioning device in a full-load refrigeration state and improving the refrigeration efficiency of the air conditioning device.

[0045] In an alternative embodiment, please refer to Figures 1 to 3 , both the first throttling device 8 and the second throttling device 9 can adopt expansion valves. Specifically, an expansion valve is a device that controls the refrigerant flow rate entering a device by sensing the superheat of the gaseous refrigerant at the outlet of the device connected thereto. Among them, the expansion valve is preferably an electronic expansion valve, so that the opening degrees of both the first throttling device 8 and the second throttling device 9 can be adjusted by a controller, making the mode switching of the entire air conditioning device simpler and more convenient.

[0046] In an embodiment, please refer to Figure 3 , the air conditioning device further includes an air outlet circuit, and the air outlet circuit includes a driving pump 12 and an air outlet assembly 6. The inlet of the driving pump 12 is connected to the outlet of the main container 501 of the cold storage device 5, the outlet of the driving pump 12 is connected to the inlet of the air outlet assembly 6, and the outlet of the air outlet assembly 6 is connected to the inlet of the main container 501 of the cold storage device 5. Specifically, the air outlet assembly 6 is a component or assembly through which the cold storage medium can flow and can exchange heat with the medium (air or water) in the external environment.

[0047] The driving pump 12 is a component that converts electrical energy into mechanical energy and drives the flow of liquid. In this embodiment, the inlet of the driving pump 12 can be connected to the outlet of the main container 501 of the cold storage device 5, the outlet of the driving pump 12 can be connected to the inlet of the air outlet assembly 6, and the outlet of the air outlet assembly 6 can be connected to the inlet of the main container 501 of the cold storage device 5. The air outlet assembly 6 can be arranged at the air outlet of the air conditioning device. The cold storage medium can flow from the main container 501 to the air outlet assembly 6 under the action of the driving pump 12, and exchange heat with the air flowing through the evaporator 3 when the cold storage medium flows through the air outlet assembly 6. After the compressor 2 in the refrigeration circuit stops working, a cycle is formed between the cold storage device 5 and the air outlet assembly 6, and the cold stored in the cold storage medium is released at the air outlet assembly 6 to continuously cool the air discharged from the air outlet, so that the air conditioning device can be in a low-load cooling mode. The compressor 2 will remain closed and will not start during this process, extending the interval from when the compressor 2 stops working to when it restarts, reducing the start-stop frequency of the compressor 2, and extending the service life of the air conditioning device.

[0048] In an embodiment, please refer to Figure 5, the air outlet assembly 6 includes a first header 601, a second header 602, and at least two heat exchange branch pipes 603 respectively communicating with the first header 601 and the second header 602. The first header 601 is communicated with the outlet of the driving pump 12, and the second header 602 is communicated with the inlet of the main container 501 of the cold storage 5; at least two heat exchange branch pipes 603 are all located between the first header 601 and the second header 602, and the heat exchange branch pipes 603 are arranged at intervals to form air outlet openings.

[0049] Specifically, both the first header 601 and the second header 602 refer to tubular components with a certain length, and there are channels for liquid flow in both the first header 601 and the second header 602. The heat exchange branch pipe 603 also refers to a tubular component with a certain length, and there is also a channel for liquid flow in the heat exchange branch pipe 603. In this embodiment, by arranging the first header 601 and the second header 602 at intervals, multiple heat exchange branch pipes 603 are all located between the first header 601 and the second header 602, and the multiple heat exchange branch pipes 603 are arranged at intervals along the length direction of the first header 601 or the second header 602. One end of the heat exchange branch pipe 603 is communicated with the first header 601, and the other end of the heat exchange branch pipe 603 is communicated with the second header 602. Moreover, the inlet and outlet of the air outlet assembly 6 are respectively arranged on the first header 601 and the second header 602, so that the cold storage medium can enter the first header 601 from the inlet and then enter the second header 602 after passing through the multiple heat exchange branch pipes 603 respectively, and finally flow out of the air outlet assembly 6 through the outlet on the second header 602. At the same time, the multiple heat exchange branch pipes 603 are arranged at intervals along the length direction of the first header 601 or the second header 602, so that the air flow can pass through the gaps between adjacent two heat exchange branch pipes 603, increasing the contact area between the air outlet assembly 6 and the air, making the structure of the air outlet assembly 6 simpler, and also improving the heat exchange efficiency between the air outlet assembly 6 and the external air.

[0050] In one embodiment, please refer to Figure 5 , the air outlet assembly 6 further includes a first temperature sensor 604 fixed on the heat exchange branch pipe 603 and used for detecting the temperature at the air outlet opening. Specifically, the first temperature sensor 604 refers to a component that can detect temperature. The first temperature sensor 604 can adopt a thermal resistance type, a thermocouple type, or a semiconductor thermistor type, etc. The temperature sensor can be electrically connected to the controller, so that the controller can obtain the temperature at the location where the air outlet assembly 6 is located, that is, at the air outlet, making the control more convenient.

[0051] In one embodiment, please refer to Figure 2 and Figure 3, a first one-way valve 10 is provided at the outlet of the air outlet assembly 6, and a second one-way valve 11 is provided at the outlet side of the heat exchange channel 502 of the cold accumulator 5. Specifically, both the first one-way valve 10 and the second one-way valve 11 refer to components or assemblies that only allow fluid to flow in one direction. In this embodiment, by providing the first one-way valve 10 at the outlet of the air outlet assembly 6, the first one-way valve 10 can ensure the one-way flow of the refrigerant between the air outlet assembly 6 and the main container 501. At the same time, the second one-way valve 11 is provided at the outlet side of the heat exchange channel 502 of the cold accumulator 5, and the second one-way valve 11 can prevent the refrigerant flowing out of the evaporator 3 from flowing into the cold accumulator 5 through the outlet of the heat exchange channel 502, making the circulation of the entire refrigeration circuit and the air outlet circuit safer and more reliable.

[0052] In one embodiment, please refer to Figure 1 and Figure 2 , the air-conditioning device has a first air duct 101 and a second air duct 102. The evaporator 3 is located in the first air duct 101, the condenser 4 is located in the second air duct 102, a communication structure is further provided between the first air duct 101 and the second air duct 102, and a damper assembly 7 for adjusting the opening degree of the communication structure is further provided at the communication structure.

[0053] Specifically, both the first air duct 101 and the second air duct 102 refer to channel structures with a certain length, usually inside the air-conditioning housing 1. Generally, the first air duct 101 and the second air duct 102 are not connected to each other. The first air duct 101 has a hot air return opening 104 and a cold air outlet 103, where the cold air outlet 103 is the air outlet of the entire air-conditioning device. At the same time, the evaporator 3 is arranged in the first air duct 101, so that the hot air in the data center or the server cabinet can enter the first channel through the hot air return opening 104 and be discharged from the cold air outlet 103 after being cooled by the evaporator 3. The first air duct 101 has a condensation inlet 105 and a condensation outlet 106. At the same time, the condenser 4 is located in the second air duct 102, and the external air can enter the second air duct 102 through the condensation inlet 105 and be discharged from the condensation outlet 106 of the second air duct 102 after the condenser 4 takes away the heat. The communication structure refers to a structure that can connect the first air duct 101 and the second air duct 102 to each other. The communication structure can be a communication hole or a communication channel, etc. The damper assembly 7 refers to a component or assembly that can adjust the opening degree of a hole or a channel, and the opening degree refers to the degree of opening.

[0054] In this embodiment, by providing an air valve assembly 7 at the connection structure, the air valve assembly 7 can be opened when the air in the first air duct 101 needs to be heated, so that the high-temperature air in the second air duct 102 can enter the first air duct 101, thereby realizing the heating function of the air-conditioning device, avoiding the increase in energy consumption caused by using an electric heating component for heating, making the heating of the air-conditioning device more energy-efficient, and improving the functionality of the air-conditioning device.

[0055] It should be noted that during the refrigeration process of the air-conditioning device, when the temperature of the air outlet is close to the dew point temperature, the air valve assembly 7 can also be opened to allow the hot air in the second channel to flow into the first channel, thereby increasing the temperature of the air in the first channel and preventing the condensation problem caused by too low air outlet temperature.

[0056] In an alternative embodiment, please refer to Figure 6 and Figure 7 , the air valve assembly 7 may include a main frame 701, a blade driving structure (not marked in the figure), and a plurality of swing blades 702. The plurality of swing blades 702 are rotatably mounted in the main frame 701 through rotating shafts, and the plurality of swing blades 702 may be arranged in sequence. The blade driving structure is used to drive the plurality of blades to move between opening and closing. The driving end of the blade driving structure is connected to the controller, making the use and adjustment of the air valve assembly 7 more convenient.

[0057] In one embodiment, please refer to Figure 9 , the air-conditioning device at least has a medium-load refrigeration mode. In the medium-load refrigeration mode, the first throttling device 8 and the second throttling device 9 are opened. The first throttling device 8 is used to distribute part of the refrigerant in the refrigeration main circuit to the evaporator 3 for heat exchange; the second throttling device 9 is used to distribute the remaining refrigerant to the heat exchange channel 502 of the cold storage device 5 in the cold storage circuit to exchange heat with the coolant of the main container 501. Specifically, at this time, the working components of the air conditioner are the compressor 2, the condenser 4, the first throttling device 8, the evaporator 3, the cold storage device 5, and the second throttling device 9.

[0058] The specific working principle is that on the basis of medium-load refrigeration, a two-way shunt design is carried out. That is, after the refrigerant in the refrigeration circuit passes through the condenser 4, it will be distributed into the evaporator 3 and the cold storage device 5. The specific flow distribution is achieved by controlling the opening degrees of the first throttling device 8 and the second throttling device 9. Among them, the opening degree of the first throttling device 8 is linearly adjusted according to the size of the air outlet temperature at the air outlet, and the opening degree of the second throttling device 9 is adjusted according to the size of the remaining capacity of the system. For example, if the opening degree range of the first throttling device 8 is Ymin - Ymax, and the opening degree range of the second throttling device 9 is Xmin - Xmax, then when the air outlet temperature changes from the lower limit to the upper limit, the opening degree adjustment of the first throttling device 8 will linearly change from Ymin to Ymax, while the opening degree adjustment of the second throttling device 9 will linearly change from Xmax to Xmin at the same time.

[0059] In one embodiment, please refer to Figure 10 , the air-conditioning device at least has a low-load refrigeration mode. In the low-load refrigeration mode, the first throttling device 8 and the second throttling device 9 are closed, and the driving pump 12 is used to drive the coolant in the main container 501 to the air outlet assembly 6 for heat exchange. Specifically, in the low-load refrigeration mode, the air-conditioning working components are the cold storage device 5, the driving pump 12, and the air outlet assembly 6. The specific working principle is that the driving pump 12 provides power to transport the low-temperature cold storage medium in the cold storage device 5 to the air outlet assembly 6 at the air outlet, and the air in the cabinet conveyed by the air blower will exchange heat with the low-temperature cold storage medium on the surface of the air outlet assembly 6, so that the temperature of the air in the cabinet is reduced.

[0060] In one embodiment, please refer to Figure 11, the air conditioning device has at least a heating mode. In the heating mode, the first throttle device 8 is closed, the second throttle device 9 is opened, and the air valve assembly 7 is opened; the second throttle device 9 is used to distribute the refrigerant into the heat exchange channel 502 of the cold storage device 5 to exchange heat with the coolant of the main container 501, and the air valve assembly 7 is used to distribute part of the air in the second air duct 102 after flowing through the condenser 4 to the first air duct 101. Specifically, when the air conditioning device is in the heating mode, the remaining working components in the air conditioning device are the compressor 2, the condenser 4, the air valve assembly 7, the second throttle device 9, and the cold storage device 5. The specific working principle is as follows: The high-temperature gaseous refrigerant discharged by the compressor 2 exchanges heat with the air outside the cabinet in the condenser 4, and then flows through the second throttle device 9 to become a liquid low-temperature refrigerant and enters the cold storage device 5 to exchange heat with the cold storage medium, and circulates continuously. In this process, the air valve assembly 7 will automatically adjust the opening degree according to the size of the heating demand. The heat of the refrigerant is first transferred to the air outside the cabinet on the condenser 4 side, and the heated air outside the cabinet is, under the action of the condensation fan and the supply fan, partly blown out of the cabinet and partly mixed and circulated with the air inside the cabinet. Since part of the high-temperature air passing through the condenser 4 is continuously delivered into the cabinet, the temperature of the air inside the cabinet will also rise, thus increasing the air temperature inside the cabinet.

[0061] In addition, in this process, the refrigerant absorbs the heat of the cold storage medium in the cold storage device 5. Therefore, the temperature of the cold storage medium decreases, thus achieving the effect of storing the cold quantity in the cold storage device 5. This part of the cold quantity can be utilized in the subsequent refrigeration mode, saving the energy consumed by the air conditioning device.

[0062] In addition, it should be noted that when the air conditioning device is in the heating mode, the air valve assembly 7 is in the open state, and there is a linear variation relationship between the opening degree of the air valve assembly 7 and the outlet air temperature. Both the first throttle device 8 and the second throttle device 9 are in the open state, and the refrigeration circuit is also in the working state. During the circulation process, part of the refrigerant flows through the evaporator 3 and the other part of the refrigerant flows through the cold storage device 5, making the circulation more reasonable.

[0063] In one embodiment, please refer to Figure 8 and Figure 9 , the air conditioning device has at least a full-load refrigeration mode, a medium-load refrigeration mode, and an anti-condensation mode, and may also have other modes which will not be elaborated here.

[0064] In the full-load refrigeration mode, the first throttling device 8 is opened, and the second throttling device 9 is closed. The first throttling device 8 is used to distribute all the refrigerant to the evaporator 3 for heat exchange. At this time, the working components of the air conditioner are the compressor 2, the condenser 4, the first throttling device 8, and the evaporator 3. The specific working principle of the air-conditioning device is that the first throttling device 8 is in the open state. The high-temperature gaseous refrigerant discharged by the compressor 2 dissipates heat to the outside of the cabinet through the condenser fan and the condenser 4, and then flows through the first throttling device 8 to become a liquid low-temperature refrigerant and evaporates in the evaporator 3, absorbing the heat of the circulating air in the cabinet, thereby rapidly reducing the temperature of the circulating air in the cabinet.

[0065] In the medium-load refrigeration mode, the first throttling device 8 and the second throttling device 9 are opened. The first throttling device 8 is used to distribute part of the refrigerant to the evaporator 3 for heat exchange; the second throttling device 9 is used to distribute the remaining part of the refrigerant to the heat exchange channel 502 of the cold storage 5 to exchange heat with the coolant of the main container 501. In the anti-condensation mode, the air-conditioning device operates in the full-load refrigeration mode or the medium-load refrigeration mode, and the air valve assembly 7 is opened. The air valve assembly 7 is used to distribute part of the air in the second air duct 102 after flowing through the condenser 4 to the first air duct 101. The working process of the air-conditioning device in the medium-load refrigeration mode and the anti-condensation mode is the same as that described above and will not be elaborated here.

[0066] In one embodiment, please refer to Figures 1 to 3 , during the operation of the air-conditioning device, the controller can obtain the outlet air temperature at the air outlet, calculate the first mode demand value according to the first formula, calculate the second mode demand value according to the second formula, and determine the current target function mode of the air-conditioning system according to the range of the first mode demand value or the second mode demand value.

[0067] Among them, the first formula is:

[0068] β1 = (T1 - Ts) / Tc

[0069] In the first formula, β1 is the first mode demand value, T1 is the outlet air temperature at the air outlet of the air conditioner, Ts is the preset target outlet air temperature, and Tc is the preset refrigeration target difference.

[0070] Among them, the second formula is:

[0071] β2 = (Ts - T1) / Tr

[0072] In the second formula, β2 is the second mode demand value, T1 is the outlet air temperature at the air outlet of the air conditioner, Ts is the preset target outlet air temperature, and Tr is the preset heating target difference.

[0073] When the first mode demand value is greater than or equal to the first threshold, the air conditioning system is in the full-load refrigeration mode. When the first mode demand value is greater than the second threshold and less than the first threshold, the air conditioning system is in the medium-load refrigeration mode, and the first threshold is greater than the second threshold. Specifically, both the first threshold and the second threshold are preset values, which can be set according to the working environment of the air conditioning system and other factors. For example, the first threshold can be 100% or 1, and the second threshold can be 33% or 0.33. When β1≥100%, the air conditioning system is in the full-load refrigeration mode. When 33%<β1<100%, the air conditioning system is in the medium-load refrigeration mode

[0074] When the first mode demand value is less than or equal to the second threshold, obtain the cold liquid temperature T2 of the cold storage medium in the main container 501, and calculate the effective temperature difference value η between the outlet air temperature T2 and the cold liquid temperature Ty. If the effective temperature difference value is greater than or equal to the fourth threshold, the air conditioning system enters the low-load refrigeration mode. If the effective temperature difference value is less than the fourth threshold, the air conditioning system re-enters the medium-load refrigeration mode. Specifically, a second temperature detection unit can be set at the cold storage device 5. Among them, the second threshold can be 33%, and the value of the fourth threshold can be 3, that is, when β1≤33%, at the same time, obtain the cold liquid temperature of the cold storage medium in the main container 501 through the second temperature detection unit, and satisfy T2 - Ty = η>3, then the air conditioning device enters the low-load refrigeration mode.

[0075] If it meets the condition that the first mode demand value is less than or equal to the second threshold, but does not meet the condition that the effective temperature difference value is less than the fourth threshold (Ty<T2 - η), it is considered that the cold liquid temperature of the cold storage medium in the main container 501 of the current cold storage device 5 is not low enough to meet the refrigeration demand. Then, it directly switches to the medium-load refrigeration mode at this time.

[0076] In the full-load refrigeration mode, if the change of the first mode demand value β1 meets the condition of entering the medium-load or low-load refrigeration mode, it can directly switch to the corresponding mode. In the medium-load refrigeration mode, if the change of the first mode demand value β1 meets the condition of entering the high-load or low-load refrigeration mode, it directly switches to the corresponding mode. In the low-load refrigeration mode, if the change of the first mode demand value β1 meets the condition of entering the high-load or medium-load refrigeration mode, it can directly switch to the corresponding mode. In the refrigeration mode (including full-load, medium-load, and low-load), if the first mode demand value is less than or equal to the third threshold, for example, β1≤-50%, the air conditioning system exits the refrigeration mode.

[0077] In addition, when the air conditioning device is in the low-load cooling mode, when the outlet air temperature rises to the rated temperature and the duration is greater than or equal to the rated time, the air conditioning device switches from the low-load cooling mode to the medium-load cooling mode. Specifically, the rated temperature can be 0.5°C and the duration can be 60S. If the β1 change does not meet the requirements for entering the medium-load or full-load cooling mode, but the outlet air temperature T1 has been detected to rise by 0.5°C for 60 consecutive seconds, the medium-load cooling mode is directly switched. This can avoid the situation where the air outlet temperature rises and the cooling cannot be carried out in time, which affects the operation of the components in the cabinet, making the use of the air conditioning device safer.

[0078] While judging the interval range of the first mode demand value, the interval range of the second mode demand value is also judged. If the second mode demand value is greater than the fifth threshold, the air conditioner enters the heating mode, and when the air conditioner is in the heating mode, if the second mode demand value is less than the sixth threshold, the air conditioner exits the heating mode. Specifically, the fifth threshold can be 100%, and the sixth threshold can be 0%. When the mode demand β2 ≥ 100%, the air conditioner enters the heating mode.

[0079] When the air conditioning system is in full load cooling mode or medium load cooling mode, the controller will also calculate the second temperature difference between the outlet air temperature and the dew point temperature at the same time. The dew point temperature can be calculated according to the existing formula. If the second temperature difference is less than or equal to the seventh threshold, the air valve assembly 7 is adjusted to the open state. Specifically, the seventh threshold can be 3. At this time, if in the full load or medium load cooling process, the difference between the outlet air temperature T1 and the return air dew point temperature Td is Vf=T1-Td≤3, that is, less than or equal to the seventh threshold, then the air valve assembly 7 is turned on to enter the anti-condensation mode of the air conditioner (the anti-condensation mode can be superimposed on other modes), and the high-temperature cabinet air outside the condenser 4 is introduced into the air conditioner, thereby increasing the outlet air temperature and avoiding condensation in the air outlet area.

[0080] The above description is only a preferred embodiment of the present invention, and only specifically describes the technical principle of the present invention. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modification, equivalent substitution and improvement made within the spirit and principle of the present invention, and other specific embodiments of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. An air-conditioning device, characterized in that, Comprising: A main refrigeration circuit, including a compressor, a condenser, a first throttling device, and an evaporator connected in sequence; A cold storage circuit, including a second throttling device and a cold storage device. The inlet of the second throttling device is connected between the condenser and the first throttling device. The outlet of the second throttling device is connected to the inlet of the heat exchange channel of the cold storage device. The outlet of the heat exchange channel of the cold storage device is connected between the evaporator and the compressor.

2. The air-conditioning device according to claim 1, characterized in that, Further comprising: An air outlet circuit, the air outlet circuit including a driving pump and an air outlet assembly. The inlet of the driving pump is connected to the outlet of the main container of the cold storage device. The outlet of the driving pump is connected to the inlet of the air outlet assembly. The outlet of the air outlet assembly is connected to the inlet of the main container of the cold storage device.

3. The air conditioner device according to claim 2, characterized in that, The air outlet assembly includes a first header, a second header, and at least two heat exchange branch pipes respectively communicating with the first header and the second header. The first header communicates with the outlet of the driving pump. The second header communicates with the inlet of the main container of the cold storage device. At least two of the heat exchange branch pipes are both located between the first header and the second header, and each heat exchange branch pipe is spaced apart to form an air outlet.

4. The air conditioner according to claim 3, characterized in that, The air outlet assembly further includes a first temperature sensor fixed on the heat exchange branch pipe and used to detect the temperature at the air outlet.

5. The air-conditioning device according to claim 2, characterized in that, A first one-way valve is provided at the outlet of the air outlet assembly, and a second one-way valve is provided on the outlet side of the heat exchange channel of the cold storage device.

6. The air-conditioning device according to any one of claims 2 to 5, characterized in that There is a first air duct and a second air duct in the air-conditioning device. The evaporator is located in the first air duct. The condenser is located in the second air duct. A communication structure is further provided between the first air duct and the second air duct, and a wind valve assembly for adjusting the opening degree of the communication structure is further provided at the communication structure.

7. The air-conditioning device according to claim 2, wherein The air-conditioning device at least has a medium-load refrigeration mode. In the medium-load refrigeration mode, the first throttling device and the second throttling device are opened. The first throttling device is used to distribute part of the refrigerant in the main refrigeration circuit to the evaporator for heat exchange. The second throttling device is used to distribute the remaining refrigerant to the heat exchange channel of the cold storage device in the cold storage circuit to exchange heat with the coolant of the main container.

8. The air-conditioning device according to claim 2, characterized in that, The air-conditioning device at least has a low-load refrigeration mode. In the low-load refrigeration mode, the first throttling device and the second throttling device are closed. The driving pump is used to drive the coolant of the main container to the air outlet assembly for heat exchange.

9. The air-conditioning device according to claim 6, characterized in that, The air-conditioning device at least has a heating mode. In the heating mode, the first throttling device is closed, the second throttling device is opened, and the wind valve assembly is opened. The second throttling device is used to distribute the refrigerant to the heat exchange channel of the cold storage device to exchange heat with the coolant of the main container. The wind valve assembly is used to distribute part of the air in the second air duct after flowing through the condenser to the first air duct.

10. The air conditioner device according to claim 6, wherein, The air-conditioning device at least has a full-load refrigeration mode, a medium-load refrigeration mode, and an anti-condensation mode; In the full-load refrigeration mode, the first throttling device is opened, the second throttling device is closed, and the first throttling device is used to distribute all the refrigerant to the evaporator for heat exchange; In the medium-load refrigeration mode, the first throttling device and the second throttling device are opened. The first throttling device is used to distribute part of the refrigerant to the evaporator for heat exchange; the second throttling device is used to distribute the remaining part of the refrigerant to the heat exchange channel of the cold storage device to exchange heat with the coolant of the main container; In the anti-condensation mode, the air-conditioning device operates in the full-load refrigeration mode or the medium-load refrigeration mode, and the air valve assembly is opened; The air valve assembly is used to distribute part of the air in the second air duct after flowing through the condenser to the first air duct.

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