Air conditioning system and control method thereof

Abstract

The invention discloses an air conditioning system and a control method thereof. The air conditioning system comprises a compressor, a condenser, an expansion valve, an evaporator, a fluorine pump assembly, a reversing assembly and a temperature control assembly. The compressor is provided with an exhaust port and an air return port. An inlet of the condenser is communicated with the exhaust port through a connecting pipeline; the fluorine pump assembly is provided with a first communicating port and a second communicating port, and the first communicating port communicates with an outlet of the condenser; an inlet of the expansion valve communicates with the second communicating port; an inlet of the evaporator communicates with an outlet of the expansion valve. The reversing assembly is provided with a third communicating port, a fourth communicating port and a fifth communicating port, the third communicating port communicates with the outlet of the evaporator, the fourth communicating port communicates with the air return port, and the fifth communicating port communicates with the connecting pipeline. The temperature control assembly is used for detecting the environment temperature and controlling the compressor, the fluorine pump assembly and the reversing assembly according to the environment temperature. According to the technical scheme, the transformation difficulty is small, the work amount is small, and control is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning system and a control method thereof. Background Art

[0002] The air conditioning system of a data center generally has very high energy consumption, which leads to a high PUE value (total energy consumption of the data center / energy consumption of IT equipment) of the data center, increasing the operating costs of the data center. Therefore, energy-saving transformation of the existing air conditioning system is imperative.

[0003] Among the related technologies, energy-saving transformation mainly makes full use of natural cooling sources, such as fluorine pump systems, heat pipe systems, large water cooling systems, evaporative cooling systems, etc. These transformations require major changes to the air-conditioning system, with large engineering workloads, high requirements for installation space or are difficult to transform at all, and the input-output ratio is extremely low. Summary of the invention

[0004] The embodiment of the present application provides an air conditioning system and a control method thereof, which can realize convenient and fast energy-saving transformation.

[0005] In a first aspect, an embodiment of the present application provides an air conditioning system, the air conditioning system comprising:

[0006] A compressor having an exhaust port and an air return port;

[0007] A condenser, wherein the inlet of the condenser is connected to the exhaust port through a connecting pipe;

[0008] A fluorine pump assembly having a first communication port and a second communication port, wherein the first communication port is communicated with the outlet of the condenser;

[0009] an expansion valve, wherein an inlet of the expansion valve is connected to the second communication port;

[0010] an evaporator, wherein an inlet of the evaporator is connected to an outlet of the expansion valve;

[0011] a reversing assembly having a third communication port, a fourth communication port and a fifth communication port, wherein the third communication port is connected to the outlet of the evaporator, the fourth communication port is connected to the air return port, and the fifth communication port is connected to the connecting pipe; and

[0012] A temperature control component is connected to the compressor, the fluorine pump component and the reversing component, and is used to detect the ambient temperature, and control the start and stop of the compressor, the start and stop of the fluorine pump component and the reversing component according to the ambient temperature so that the third connecting port is selectively connected to the fourth connecting port or the fifth connecting port.

[0013] Optionally, the reversing assembly comprises a multi-way valve, and the multi-way valve comprises:

[0014] a valve body having the third communication port, the fourth communication port and the fifth communication port, wherein a valve cavity is provided in the valve body, and the third communication port, the fourth communication port and the fifth communication port are all connected to the valve cavity; and

[0015] The electric valve core is movably disposed in the valve cavity so that the third communication port can selectively communicate with the fourth communication port or the fifth communication port.

[0016] Optionally, the fluorine pump assembly comprises:

[0017] a fluorine pump disposed between the first communication port and the second communication port; and

[0018] The first one-way valve is disposed on a bypass pipe connecting the first communication port and the second communication port, and is conductive in a direction from the first communication port to the second communication port, wherein the bypass pipe is disposed in parallel with the fluorine pump.

[0019] Optionally, the air conditioning system further includes an energy-saving mounting shell, the fluorine pump assembly and the reversing assembly are arranged in the energy-saving mounting shell, and the first connecting port, the second connecting port, the third connecting port, the fourth connecting port and the fifth connecting port are exposed outside the energy-saving mounting shell.

[0020] Optionally, an inner wall surface and / or an outer wall surface of the energy-saving installation shell is provided with a thermal insulation layer.

[0021] Optionally, a liquid storage tank is further included, and the liquid storage tank is connected with the outlet of the condenser and the first communication port.

[0022] Optionally, it also includes a second one-way valve, which is arranged in the connecting pipe to form a one-way flow path from the exhaust port to the condenser in the connecting pipe, and the fifth connecting port is connected to the connecting pipe between the second one-way valve and the condenser.

[0023] Optionally, the air conditioning system includes an outdoor unit and an indoor unit, wherein the outdoor unit includes the condenser, and the indoor unit includes the compressor, the fluorine pump assembly, the expansion valve, the evaporator and the reversing assembly.

[0024] In a second aspect, an embodiment of the present application provides a control method for an air conditioning system as described in any one of the above items, wherein the temperature control component includes a temperature sensor, and the control method includes the following steps:

[0025] Controlling the temperature sensor to obtain the ambient temperature;

[0026] According to the ambient temperature, the reversing component is controlled to make the third connecting port selectively connected with the fourth connecting port or the fifth connecting port, and the start and stop of the compressor and the fluorine pump component are selectively controlled.

[0027] Optionally, the step of controlling the reversing component according to the ambient temperature so that the third communication port is selectively connected to the fourth communication port or the fifth communication port, and selectively controlling the start and stop of the compressor and the fluorine pump component comprises:

[0028] Compare the ambient temperature with a first preset value and a second preset value, wherein the first preset value is greater than the second preset value;

[0029] When the ambient temperature is greater than or equal to a first preset value, the reversing assembly is controlled to connect the third communication port with the fourth communication port, and the compressor is controlled to operate;

[0030] When the ambient temperature is less than a first preset value and greater than or equal to a second preset value, the reversing assembly is controlled to connect the third communication port with the fourth communication port, and the compressor and the fluorine pump assembly are controlled to operate;

[0031] When the ambient temperature is less than a second preset value, the reversing assembly is controlled to connect the third communication port with the fifth communication port, the compressor is controlled to be turned off, and the fluorine pump assembly is controlled to operate.

[0032] Based on the above embodiments, in the air-conditioning system of the embodiments of the present application, the fluorine pump assembly utilizes a natural cold source to assist in refrigeration, the reversing assembly has a third connecting port connected to the outlet of the evaporator, a fourth connecting port connected to the return air port, and a fifth connecting port connected to the connecting pipe. The temperature control assembly can control the reversing assembly according to the ambient temperature so that the third connecting port is selectively connected to the fourth connecting port or the fifth connecting port, and control the start and stop of the compressor and the start and stop of the fluorine pump assembly to switch different refrigeration cycles more conveniently. The reversing assembly has fewer interfaces, and the transformation difficulty is smaller when performing energy-saving transformation of the system, the engineering workload is smaller, and the control is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0034] Figure 1 This is a structural schematic diagram of an embodiment of an air conditioning system of the present application;

[0035] Figure 2 Schematic diagram of a flow chart of a method for controlling an air-conditioning system according to an embodiment of the present application.

[0036] Description of Figure Numbers:

[0037] Label name Label name 100 Air conditioning system 6 Expansion valve 1 compressor 7 Evaporator 1a Exhaust port 8 Reversing components 1b Air return port 9 Second check valve 2 Connecting pipes a First connecting port 3 Condenser b The second connecting port 4 Fluid storage tank c The third connecting port 5 Fluorine pump components d Fourth connecting port 51 Fluorine pump e Fifth connecting port 53 First check valve

[0038] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0040] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0041] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0043] The air conditioning system of a data center generally has very high energy consumption, which leads to a high PUE value (total energy consumption of the data center / energy consumption of IT equipment) of the data center, increasing the operating costs of the data center. Therefore, energy-saving transformation of the existing air conditioning system is imperative.

[0044] Among the related technologies, energy-saving transformation mainly makes full use of natural cooling sources, such as fluorine pump systems, heat pipe systems, large water cooling systems, evaporative cooling systems, etc. These transformations require major changes to the air-conditioning system, with large engineering workloads, high requirements for installation space or are difficult to transform at all, and the input-output ratio is extremely low.

[0045] In order to solve the above problems and realize convenient and fast energy-saving transformation, a first aspect of an embodiment of the present application provides an air-conditioning system 100.

[0046] Please refer to Figure 1 The air conditioning system 100 includes a compressor 1, a condenser 3, an expansion valve 6, an evaporator 7, a fluorine pump component 5, a reversing component 8 and a temperature control component.

[0047] Among them, the compressor 1 is used to compress and transport the refrigerant, and has an exhaust port 1a and a return port 1b; the condenser 3 has a heat dissipation effect on the refrigerant, and the inlet of the condenser 3 is connected to the exhaust port 1a through a connecting pipe 2. It can be understood that the connecting pipe 2 can be a whole section of connecting pipe or a plurality of connecting pipes spliced ​​together; the fluorine pump assembly 5 has a first connecting port a and a second connecting port b, and the first connecting port a is connected to the outlet of the condenser 3; the inlet of the expansion valve 6 is connected to the second connecting port b; the evaporator 7 has a heat absorption effect on the refrigerant, and the inlet of the evaporator 7 is connected to the outlet of the expansion valve 6; the reversing assembly 8 has a third connecting port c, a fourth connecting port d and a fifth connecting port e, the third connecting port c is connected to the outlet of the evaporator 7, the fourth connecting port d is connected to the return port 1b, and the fifth connecting port e is connected to the connecting pipe 2. The temperature control component is connected to the compressor 1, the fluorine pump component 5 and the reversing component 8, and is used to detect the ambient temperature, and control the start and stop of the compressor 1 according to the ambient temperature, control the start and stop of the fluorine pump component 5, and control the reversing component 8 so that the third connecting port c is selectively connected to the fourth connecting port d or the fifth connecting port e.

[0048] It can be understood that the above-mentioned interfaces can be directly connected through components such as connecting pipes, or indirectly connected through other devices, and at the intersection of the interfaces, there are structural parts such as adapters for constructing an overall loop to form a refrigeration cycle. The embodiment of the present application does not limit the connection method of the loop.

[0049] like Figure 1 As shown, according to different connection modes of the reversing assembly 8, the air conditioning system 100 of the embodiment of the present application has the following circulation modes:

[0050] In the first cycle, the third connecting port c and the fourth connecting port d in the reversing component 8 are connected, the third connecting port c and the fifth connecting port e are not connected, and the compressor 1 is in operation. The refrigerant flows from the exhaust port 1a of the compressor 1 into the condenser 3 for cooling and heat dissipation, flows through the fluorine pump component 5, and then flows through the expansion valve 6 for throttling to the evaporator 7 to absorb heat, and then flows through the reversing component 8, flows in from the third connecting port c, flows out from the fourth connecting port d, and then flows back to the compressor 1 from the return port 1b to form a complete first cycle.

[0051] In the second cycle, the third connecting port c in the reversing assembly 8 is connected to the fourth connecting port d, the third connecting port c is not connected to the fifth connecting port e, and the compressor 1 and the fluorine pump assembly 5 are both in operation. The flow direction of the refrigerant is the same as that of the first cycle, but different from the first cycle, in the second cycle, the fluorine pump assembly 5 is in operation.

[0052] In the third cycle, the third connecting port c in the reversing assembly 8 is connected to the fifth connecting port e, the third connecting port c is not connected to the fourth connecting port d, and the fluorine pump assembly 5 is in operation, and the compressor 1 is in a closed state. The low-temperature liquid refrigerant flows from the second connecting port b of the fluorine pump assembly 5 to the expansion valve 6 for throttling, and then to the evaporator 7 for heat absorption, and then flows through the reversing assembly 8, flows in from the third connecting port c, and flows out from the fifth connecting port e, and then flows back to the first connecting port a through the connecting pipe 2 to form a complete third cycle.

[0053] It can be understood that the temperature control component includes a temperature sensor and a thermostat. The temperature sensor is used to obtain the outdoor ambient temperature in real time, and convert it into an electrical signal and transmit it to the thermostat, and the thermostat performs relevant processing on the electrical signal. Optionally, the thermostat can call the first preset value and the second preset value in the memory, the first preset value and the second preset value are both temperature values, and the first preset value is greater than the second preset value. After processing the electrical signal, the thermostat can obtain a real-time ambient temperature value, compare the ambient temperature with the first preset value and the second preset value, and control the start and stop of the compressor 1, the start and stop of the fluorine pump assembly 5, and the reversing assembly 8 according to the comparison result so that the third connecting port c is selectively connected to the fourth connecting port d or the fifth connecting port e, so as to adopt the above-mentioned first cycle, second cycle or third cycle.

[0054] Among them, when the ambient temperature is greater than the first preset value, only the compressor 1 is started, and the first cycle is used to quickly cool down or maintain a more suitable temperature more stably; when the ambient temperature is less than the first preset value, and greater than or equal to the second preset value, the compressor 1 and the fluorine pump assembly 5 are controlled to run simultaneously, and the second cycle is used. The compressor 1 and the fluorine pump assembly 5 run simultaneously, and the auxiliary cooling of the fluorine pump assembly 5 is partially utilized to effectively reduce the condensing pressure and temperature of the compressor 1, reduce the power consumption of the compressor 1, and increase the system energy efficiency ratio; when the ambient temperature is less than the second preset value, it means that the ambient temperature is low. At this time, only the fluorine pump assembly 5 is controlled to run, and the third cycle is used to make full use of the natural cold source. The fluorine pump assembly 5 replaces the compressor 1 as the power system to drive the refrigerant to circulate in the system, and the power consumption is much lower than that of the compressor 1, thereby achieving the purpose of energy saving.

[0055] Based on the above embodiments, in the air conditioning system 100 of the embodiment of the present application, the fluorine pump assembly 5 uses a natural cold source to assist refrigeration, the reversing assembly 8 has a third connecting port c connected to the outlet of the evaporator 7, a fourth connecting port d connected to the return air port 1b, and a fifth connecting port e connected to the connecting pipe 2. The temperature control assembly can control the reversing assembly 8 according to the ambient temperature so that the third connecting port c is selectively connected to the fourth connecting port d or the fifth connecting port e, and control the start and stop of the compressor 1 and the start and stop of the fluorine pump assembly 5 to switch different refrigeration cycles more conveniently. When performing energy-saving transformation of the system, only the fluorine pump assembly 5 and the reversing assembly 8 need to be added. The reversing assembly 8 has fewer interfaces. The transformation can be completed by connecting the corresponding connecting ports to the corresponding components. The changes to the connecting pipes of the internal components of the air conditioning system 100 are relatively small, the transformation difficulty is relatively small, the engineering workload is relatively small, and the control is relatively convenient.

[0056] Commonly, the air conditioning system 100 includes an outdoor unit and an indoor unit. In one embodiment of the present application, the outdoor unit includes a condenser 3, and the indoor unit includes a compressor 1, a fluorine pump assembly 5, an expansion valve 6, an evaporator 7 and a reversing assembly 8. The outdoor unit and the indoor unit often have a relatively fixed connecting pipe connected through a through hole on the wall. The common fluorine pump assembly 5 is installed outdoors. This method often changes the connecting pipe structure between the outdoor unit and the indoor unit, and easily causes the movement of the unit position and the non-correspondence of the through hole position in the wall, and requires additional holes. In this embodiment of the present application, the fluorine pump assembly 5 and the reversing assembly 8 are both arranged in the indoor unit, making full use of the space of the indoor unit, and the installation and connecting pipes of the outdoor unit and the indoor unit are not changed, so the transformation is more convenient and more flexible.

[0057] It can be understood that when performing energy-saving modification, the first connecting port a, the second connecting port b, the third connecting port c, the fourth connecting port d and the fifth connecting port e of the energy-saving module can be connected to the relevant components of the air-conditioning system 100 accordingly.

[0058] Optionally, the air conditioning system 100 also includes an energy-saving installation shell, in which an installation space is formed, and the fluorine pump assembly 5 and the reversing assembly 8 are arranged in the installation space, and the fluorine pump assembly 5 and the reversing assembly 8 can be combined with the energy-saving installation shell to form an energy-saving module, and the energy-saving module has high versatility. The first connecting port a, the second connecting port b, the third connecting port c, the fourth connecting port d and the fifth connecting port e are exposed outside the energy-saving installation shell, and the first connecting port a, the second connecting port b, the third connecting port c, the fourth connecting port d and the fifth connecting port e can be directly or indirectly connected to the fluorine pump assembly 5 and the reversing assembly 8. Among them, the embodiment of the present application does not limit the shape of the above-mentioned connecting ports. When performing energy-saving modification, it is only necessary to connect the corresponding components with the above-mentioned connecting ports, and the modification can be completed more conveniently.

[0059] Furthermore, the fluorine pump assembly 5 mainly operates when the ambient temperature is low, and in the embodiment of the present application, the fluorine pump assembly 5 is placed indoors, and the temperature difference between indoors and outdoors is large. In order to achieve the best energy-saving effect, the inner wall surface and / or outer wall surface of the energy-saving installation shell of the present application is provided with an insulation layer. Exemplarily, the insulation layer is a foam material, which is wrapped around the outer wall surface of the energy-saving installation shell or attached to the inner surface of the energy-saving installation shell, and is mainly used to insulate the fluorine pump assembly 5 to achieve a better refrigeration energy-saving effect.

[0060] In a specific embodiment of the present application, the reversing assembly 8 includes a multi-way valve, for example, a three-way valve. The multi-way valve includes a valve body and an electric valve core. The valve body has a third communication port c, a fourth communication port d and a fifth communication port e, and a valve cavity is provided in the valve body, and the third communication port c, the fourth communication port d and the fifth communication port e are all connected to the valve cavity. The electric valve core can be movably arranged in the valve cavity so that the third communication port c can selectively communicate with the fourth communication port d or the fifth communication port e. For example, the third communication port c, the fourth communication port d and the fifth communication port e are arranged along the circumference of the valve cavity, and the electric valve core can be rotatably arranged in the valve cavity so that the third communication port c can be connected with the fourth communication port d or the fifth communication port e by rotation when receiving an electrical signal.

[0061] In other embodiments, the valve core is movably disposed in the valve cavity, and the reversing assembly 8 also includes a driving assembly electrically connected to the temperature controller, and the valve core is connected to the movable end of the driving assembly. When the driving assembly receives an electrical signal, the valve core is driven to move so that the third connecting port c is connected to the fourth connecting port d or the fifth connecting port e.

[0062] Of course, the valve body may also be provided with a plurality of valve ports, and the reversing assembly 8 may further include connecting pipes to connect the valve ports with the third connecting port c, the fourth connecting port d, and the fifth connecting port e.

[0063] In other embodiments, under the premise of achieving the above functions, the reversing assembly 8 can also be composed of a combination of multiple one-way valves and connecting pipes.

[0064] In a specific embodiment of the present application, the fluorine pump assembly 5 includes a fluorine pump 51 and a first one-way valve 53, and the fluorine pump 51 and the first one-way valve 53 are both arranged between the first connecting port a and the second connecting port b. The inlet and outlet of the fluorine pump 51 are connected to the first connecting port a and the second connecting port b through a connecting pipe. The first one-way valve 53 is arranged on a bypass pipe connecting the first connecting port a and the second connecting port b, and is conducted in the direction from the first connecting port a to the second connecting port b, wherein the bypass pipe is arranged in parallel with the fluorine pump 51, and can be connected to the connecting pipes on both sides of the fluorine pump 51.

[0065] In the first cycle, the fluorine pump 51 is in a closed state. At this time, the refrigerant flows into the expansion valve 6 through the first one-way valve 53. The first one-way valve 53 connected in parallel with the fluorine pump 51 can reduce the pressure drop of the refrigerant passing through the fluorine pump assembly 5, making it flow more smoothly.

[0066] When the fluorine pump 51 is running, there is a pressure difference at both ends of the fluorine pump 51, the outlet pressure of the fluorine pump 51 is greater than the inlet pressure, and there is a pressure difference at both ends of the first check valve 53, and the inlet pressure is less than the outlet pressure, that is, the first check valve 53 is not conducting. That is to say, in the above second cycle and the third cycle, the refrigerant flows into the expansion valve 6 through the fluorine pump 51.

[0067] Optionally, the fluorine pump assembly 5 may also only include the fluorine pump 51 and connecting pipes that connect the inlet and outlet of the fluorine pump 51 with the first connecting port a and the second connecting port b. In the first cycle, the refrigerant flows into the expansion valve 6 through the fluorine pump 51. When the fluorine pump 51 is not working, the impact on the refrigerant is small, thereby ensuring lower costs.

[0068] In an optional embodiment, the air conditioning system 100 further includes a liquid storage tank 4, which is connected to the outlet of the condenser 3 and the first connecting port a, and is used to temporarily store the liquid refrigerant flowing out of the condenser 3 to adjust the flow rate.

[0069] Optionally, the air conditioning system 100 further includes a second one-way valve 9, which is disposed in the connecting pipe 2 to form a one-way flow path from the exhaust port 1a to the condenser 3 in the connecting pipe 2, thereby preventing a large amount of high-temperature and high-pressure steam in the compressor 1 from flowing back to the evaporator 7 when the compressor 1 is shut down, causing the evaporator 7 to heat up and reduce the refrigeration efficiency. The fifth connecting port e is connected to the connecting pipe 2 between the second one-way valve 9 and the condenser 3.

[0070] Combination Figure 2 In a second aspect, an embodiment of the present application provides a control method for an air conditioning system 100 as described above, wherein the temperature control component includes a temperature sensor, and the control method includes the following steps:

[0071] S100, controlling the temperature sensor to obtain the ambient temperature;

[0072] S200 , according to the ambient temperature, control the reversing assembly 8 so that the third connecting port c is selectively connected to the fourth connecting port d or the fifth connecting port e, and selectively control the start and stop of the compressor 1 and the fluorine pump assembly 5 .

[0073] The temperature control component includes a temperature sensor and a thermostat. The temperature sensor is used to obtain the outdoor ambient temperature in real time and convert it into an electrical signal for transmission to the thermostat. The thermostat processes the electrical signal and is used to control the start and stop of the compressor 1 and the fluorine pump component 5.

[0074] According to the ambient temperature, the steps of controlling the reversing assembly 8 so that the third connecting port c is selectively connected to the fourth connecting port d or the fifth connecting port e, and selectively controlling the start and stop of the compressor 1 and the fluorine pump assembly 5 include:

[0075] S210, comparing the ambient temperature with a first preset value and a second preset value, wherein the first preset value is greater than the second preset value;

[0076] like Figure 1 As shown, according to different connection modes of the reversing assembly 8, the air conditioning system 100 of the embodiment of the present application has the following circulation modes:

[0077] In the first cycle, the third connecting port c and the fourth connecting port d in the reversing component 8 are connected, the third connecting port c and the fifth connecting port e are not connected, and the compressor 1 is in operation. The refrigerant flows from the exhaust port 1a of the compressor 1 into the condenser 3 for cooling and heat dissipation, flows through the fluorine pump component 5, and then flows through the expansion valve 6 for throttling to the evaporator 7 to absorb heat, and then flows through the reversing component 8, flows in from the third connecting port c, flows out from the fourth connecting port d, and then flows back to the compressor 1 from the return port 1b to form a complete first cycle.

[0078] In the second cycle, the third connecting port c in the reversing assembly 8 is connected to the fourth connecting port d, the third connecting port c is not connected to the fifth connecting port e, and the compressor 1 and the fluorine pump assembly 5 are both in operation. The flow direction of the refrigerant is the same as that of the first cycle, but different from the first cycle, in the second cycle, the fluorine pump assembly 5 is in operation.

[0079] In the third cycle, the third connecting port c in the reversing assembly 8 is connected to the fifth connecting port e, the third connecting port c is not connected to the fourth connecting port d, and the fluorine pump assembly 5 is in operation, and the compressor 1 is in a closed state. The low-temperature liquid refrigerant flows from the second connecting port b of the fluorine pump assembly 5 to the expansion valve 6 for throttling, and then to the evaporator 7 for heat absorption, and then flows through the reversing assembly 8, flows in from the third connecting port c, and flows out from the fifth connecting port e, and then flows back to the first connecting port a through the connecting pipe 2 to form a complete third cycle.

[0080] It can be understood that the thermostat can call the first preset value and the second preset value in the memory, and the first preset value and the second preset value are both temperature values. After processing the electrical signal, the thermostat can obtain the real-time ambient temperature value, compare the ambient temperature with the first preset value and the second preset value, and control the start and stop of the compressor 1, control the start and stop of the fluorine pump component 5, and control the reversing component 8 so that the third connecting port c is selectively connected with the fourth connecting port d or the fifth connecting port e, so as to adopt the above-mentioned first cycle, second cycle or third cycle.

[0081] Specifically:

[0082] When the ambient temperature is greater than or equal to the first preset value, the reversing assembly 8 is controlled to connect the third connecting port c with the fourth connecting port d, and the compressor 1 is controlled to run; at this time, the outdoor temperature is high and the temperature difference between indoor and outdoor is large, only the compressor 1 is started, and the first cycle is used to quickly cool down or to maintain a more suitable temperature more stably.

[0083] When the ambient temperature is less than the first preset value and greater than or equal to the second preset value, the reversing assembly 8 is controlled to connect the third connecting port c with the fourth connecting port d, and the compressor 1 and the fluorine pump assembly 5 are controlled to operate; the compressor 1 and the fluorine pump assembly 5 operate simultaneously, and the auxiliary cooling of the fluorine pump assembly 5 is partially utilized to effectively reduce the condensing pressure and temperature of the compressor 1, reduce the power consumption of the compressor 1, and increase the energy efficiency ratio of the system.

[0084] When the ambient temperature is lower than the second preset value, the reversing assembly 8 is controlled to make the third connecting port c communicate with the fifth connecting port e, and the compressor 1 is controlled to be turned off, and the fluorine pump assembly 5 is controlled to operate. At this time, the ambient temperature is low, and only the fluorine pump assembly 5 is controlled to operate, and the third cycle is adopted, so as to make full use of the natural cold source. The fluorine pump assembly 5 replaces the compressor 1 as the power system to drive the refrigerant to circulate in the system, and the power consumption is much lower than that of the compressor 1, so as to achieve the purpose of energy saving.

[0085] In a specific embodiment of the present application, the reversing assembly 8 includes a multi-way valve, for example, a three-way valve. The multi-way valve includes a valve body and an electric valve core. The valve body has a third connecting port c, a fourth connecting port d and a fifth connecting port e, and a valve cavity is provided in the valve body, and the third connecting port c, the fourth connecting port d and the fifth connecting port e are all connected to the valve cavity. The electric valve core can be movably arranged in the valve cavity so that the third connecting port c can selectively connect to the fourth connecting port d or the fifth connecting port e. For example, the third connecting port c, the fourth connecting port d and the fifth connecting port e are arranged along the circumference of the valve cavity, and the electric valve core can be rotatably arranged in the valve cavity. By controlling the rotation of the electric valve core, the third connecting port c can be connected to the fourth connecting port d or the fifth connecting port e.

[0086] Based on the above embodiments, the air conditioning system 100 of the embodiment of the present application adopts the above control method, so that the temperature control component can control the reversing component 8 according to the ambient temperature so that the third connecting port c is selectively connected with the fourth connecting port d or the fifth connecting port e, and control the start and stop of the compressor 1 and the start and stop of the fluorine pump component 5 to switch different refrigeration cycles more conveniently and quickly. When performing energy-saving transformation of the system, only the fluorine pump component 5 and the reversing component 8 need to be added. The reversing component 8 has fewer interfaces, and the transformation can be completed by connecting the corresponding connecting ports with the corresponding components. The changes to the connecting pipes of the internal components of the air conditioning system 100 are relatively small, the transformation difficulty is relatively small, the engineering workload is relatively small, and the control is relatively convenient.

[0087] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0088] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An air conditioning system, characterized in that: include: A compressor having an exhaust port and an air return port; A condenser, wherein the inlet of the condenser is connected to the exhaust port through a connecting pipe; A fluorine pump assembly having a first communication port and a second communication port, wherein the first communication port is communicated with the outlet of the condenser; an expansion valve, wherein an inlet of the expansion valve is connected to the second communication port; an evaporator, wherein an inlet of the evaporator is connected to an outlet of the expansion valve; a reversing assembly having a third communication port, a fourth communication port and a fifth communication port, wherein the third communication port is connected to the outlet of the evaporator, the fourth communication port is connected to the air return port, and the fifth communication port is connected to the connecting pipe; and A temperature control component is connected to the compressor, the fluorine pump component and the reversing component, and is used to detect the ambient temperature, and control the start and stop of the compressor, the start and stop of the fluorine pump component and the reversing component according to the ambient temperature so that the third connecting port is selectively connected to the fourth connecting port or the fifth connecting port.

2. The air conditioning system according to claim 1, characterized in that: The reversing assembly includes a multi-way valve, and the multi-way valve includes: a valve body having the third communication port, the fourth communication port and the fifth communication port, wherein a valve cavity is provided in the valve body, and the third communication port, the fourth communication port and the fifth communication port are all connected to the valve cavity; and The electric valve core is movably disposed in the valve cavity so that the third communication port can selectively communicate with the fourth communication port or the fifth communication port.

3. The air conditioning system according to claim 1, characterized in that: The fluorine pump assembly comprises: a fluorine pump disposed between the first communication port and the second communication port; and The first one-way valve is disposed on a bypass pipe connecting the first communication port and the second communication port, and is conductive in a direction from the first communication port to the second communication port, wherein the bypass pipe is disposed in parallel with the fluorine pump.

4. The air conditioning system according to claim 1, characterized in that: The air conditioning system also includes an energy-saving installation shell, the fluorine pump assembly and the reversing assembly are arranged in the energy-saving installation shell, and the first connecting port, the second connecting port, the third connecting port, the fourth connecting port and the fifth connecting port are exposed outside the energy-saving installation shell.

5. The air conditioning system according to claim 4, characterized in that: The inner wall surface and / or the outer wall surface of the energy-saving installation shell is provided with a heat-insulating layer.

6. The air conditioning system according to claim 1, characterized in that: It also includes a liquid storage tank, which is communicated with the outlet of the condenser and the first communication port.

7. The air conditioning system according to claim 1, characterized in that: It also includes a second one-way valve, which is arranged in the connecting pipe to form a one-way flow path from the exhaust port to the condenser in the connecting pipe, and the fifth connecting port is connected to the connecting pipe between the second one-way valve and the condenser.

8. The air conditioning system according to claim 1, characterized in that: The air conditioning system comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises the condenser, and the indoor unit comprises the compressor, the fluorine pump assembly, the expansion valve, the evaporator and the reversing assembly.

9. A control method, used for the air conditioning system according to any one of claims 1 to 8, wherein the temperature control component comprises a temperature sensor, characterized in that: The control method comprises the following steps: Controlling the temperature sensor to obtain the ambient temperature; According to the ambient temperature, the reversing component is controlled to make the third connecting port selectively connected with the fourth connecting port or the fifth connecting port, and the start and stop of the compressor and the fluorine pump component are selectively controlled.

10. The control method according to claim 9, characterized in that: The step of controlling the reversing assembly according to the ambient temperature so that the third communication port is selectively connected to the fourth communication port or the fifth communication port, and selectively controlling the start and stop of the compressor and the fluorine pump assembly comprises: Compare the ambient temperature with a first preset value and a second preset value, wherein the first preset value is greater than the second preset value; When the ambient temperature is greater than or equal to a first preset value, the reversing assembly is controlled to connect the third communication port with the fourth communication port, and the compressor is controlled to operate; When the ambient temperature is less than a first preset value and greater than or equal to a second preset value, the reversing assembly is controlled to connect the third communication port with the fourth communication port, and the compressor and the fluorine pump assembly are controlled to operate; When the ambient temperature is less than a second preset value, the reversing assembly is controlled to connect the third communication port with the fifth communication port, the compressor is controlled to be turned off, and the fluorine pump assembly is controlled to operate.

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