Air conditioning system, air conditioner and control method

Abstract

The application provides an air conditioning system, an air conditioner and a control method. The air conditioning system comprises a first refrigeration system and a second refrigeration system, the first refrigeration system and the second refrigeration system are arranged in parallel, a regulating condenser is arranged in parallel with the first refrigeration system and the second refrigeration system, the regulating condenser is communicated with a refrigerant storage device, and the first refrigeration system and the second refrigeration system are respectively communicated with the refrigerant storage device; the refrigerant storage device respectively stores the refrigerant from the first refrigeration system, the second refrigeration system and the regulating condenser, or respectively releases the refrigerant into the first refrigeration system, the second refrigeration system and the regulating condenser. The regulating condenser and the refrigerant storage device are added to the original air conditioning system, the refrigerant storage device can regulate the first refrigeration system and the second refrigeration system with different cold energy requirements respectively, the air conditioning system is effectively protected, the system pressure is regulated, and the system load is prevented from being too heavy.

Description

Technical Field

[0001] This invention relates to the technical field of air conditioners, specifically to an air conditioning system, an air conditioner, and a control method. Background Technology

[0002] Energy conservation is a global concern, and in the air conditioning industry, air conditioners are becoming increasingly sophisticated, with refrigeration technology maturing. As air conditioning technology continues to improve, energy efficiency remains a crucial development direction, evolving from early fixed-frequency to today's inverter air conditioners. Energy efficiency ratings have become a key selling point. However, effectively improving energy efficiency without compromising performance has been a persistent challenge for the industry. For existing air conditioning systems, controlling only the compressor and electronic expansion valve is insufficient to fully and effectively adjust the system's state, as crucial system parameters such as refrigerant, condenser area, and evaporator area significantly impact performance. Furthermore, in conventional air conditioning systems, the condenser, evaporator, and refrigerant are fixed parameters. The question remains: can these components be designed to be adjustable to optimize system operation, maximizing performance and significantly contributing to energy conservation?

[0003] For an air conditioning system to achieve its maximum performance, all components need to be well-matched. An oversized condenser leads to excessive frictional resistance, requiring the compressor to do more work to overcome this resistance, thus increasing its power consumption. Similarly, when the refrigerant used for heat exchange exceeds the system's saturation point, the excess refrigerant cannot be fully utilized. Current air conditioning systems primarily control the compressor's operation, but relying solely on the compressor cannot precisely regulate the entire system. Summary of the Invention

[0004] This invention provides an air conditioning system, an air conditioner, and a control method, which can solve the technical problem that existing air conditioning systems mainly control the operating status of the air conditioner by controlling the compressor, resulting in poor adjustment flexibility and insufficient precision.

[0005] An air conditioning system comprising

[0006] First refrigeration system;

[0007] The second refrigeration system is configured in parallel with the first refrigeration system.

[0008] The regulating condenser is connected in parallel with the first refrigeration system and the second refrigeration system. The regulating condenser is connected to a refrigerant storage tank, and the first refrigeration system and the second refrigeration system are respectively connected to the refrigerant storage tank. The refrigerant storage tank stores refrigerant from the first refrigeration system, the second refrigeration system and the regulating condenser respectively, or releases refrigerant to the first refrigeration system, the second refrigeration system and the regulating condenser respectively.

[0009] In some embodiments, a diversion valve is provided between the regulating condenser and the refrigerant storage tank. The diversion valve has at least four valves, which are respectively connected to the first refrigeration system, the second refrigeration system, the regulating condenser, and the refrigerant storage tank.

[0010] A first control element is provided between the first refrigeration system and the regulating condenser, and a second control element is provided between the second refrigeration system and the regulating condenser.

[0011] In some embodiments, the first refrigeration system includes a first condenser, a first compressor, a first evaporator, and a first throttling element connected in sequence, the first condenser being connected in parallel with a regulating condenser, and the first condenser being connected to a flow divider valve;

[0012] The second refrigeration system includes a second condenser, a second compressor, a second evaporator, and a second throttling device connected in sequence. The second condenser is connected in parallel with the regulating condenser and is connected to the flow divider valve.

[0013] In some embodiments, a piston is provided in the refrigerant reservoir, and a drive for the reciprocating motion of the piston is provided at the bottom of the refrigerant reservoir.

[0014] An air conditioner includes an air conditioning system, wherein the air conditioning system is the air conditioning system described above.

[0015] A control method for an air conditioning system, wherein the air conditioning system is as described above, the control method for the air conditioning system includes the following steps:

[0016] Receive operating instructions from the air conditioning system;

[0017] According to the received instructions, the air conditioning system can be controlled to operate the first refrigeration system alone, operate the second refrigeration system alone, or operate the first refrigeration system and the second refrigeration system simultaneously.

[0018] Depending on the operating mode of the air conditioning system, the refrigerant storage device stores refrigerant from the first refrigeration system, the second refrigeration system, and the regulating condenser respectively, or releases refrigerant into the first refrigeration system, the second refrigeration system, and the regulating condenser respectively.

[0019] In some embodiments, when the air conditioning system operates in either the first refrigeration system mode or the second refrigeration system mode, the first refrigeration system includes a first condenser, a first compressor, a first evaporator, and a first throttling device connected in sequence, with the first condenser connected in parallel with a regulating condenser; the second refrigeration system includes a second condenser, a second compressor, a second evaporator, and a second throttling device connected in sequence, with the second condenser connected in parallel with a regulating condenser. The control method for the air conditioning system further includes:

[0020] Set the current set temperature of the refrigeration system;

[0021] Detect indoor and outdoor temperatures, and detect the condensing pressure of the condenser in the current refrigeration system; adjust the condensing pressure of the condenser and the condensing pressure in the refrigerant storage tank.

[0022] If the temperature difference between the current set temperature of the refrigeration system and the indoor temperature meets the set value for the compressor to enter high-frequency operation, then the compressor will operate at high frequency.

[0023] If the temperature difference between the current set temperature of the refrigeration system and the indoor temperature meets the set value for the compressor to enter low-frequency operation, then the compressor will operate at low frequency.

[0024] In some implementations, when the compressor is running at high frequency, the control method for the air conditioning system further includes:

[0025] The current refrigeration system has a condenser and a regulating condenser connected in parallel, and both condensers and regulating condensers supply refrigerant to the compressor simultaneously;

[0026] If both the condenser's condensing pressure and the regulating condenser's condensing pressure are within the optimal condensing pressure range, then the condenser and the regulating condenser will simultaneously supply refrigerant to the compressor.

[0027] If the condensing pressure of the condenser and / or the condensing pressure of the regulating condenser is less than the minimum value of the optimal condensing pressure range, the refrigerant will be released into the condenser and / or the regulating condenser according to the condensing pressure in the refrigerant reservoir.

[0028] In some implementations, when the compressor is running at low frequency, the control method for the air conditioning system further includes:

[0029] The condenser of the current refrigeration system is disconnected from the regulating condenser, and the condenser supplies refrigerant to the compressor.

[0030] If the condenser's condensing pressure is within the optimal condensing pressure range, the condenser will supply refrigerant to the compressor.

[0031] If the condenser's condensing pressure is less than the minimum value of the optimal condensing pressure range, the refrigerant will be released into the condenser based on the condensing pressure in the refrigerant reservoir.

[0032] In some implementations, the step of determining the condensing pressure value in the refrigerant reservoir includes:

[0033] Detect the condensing pressure in the refrigerant reservoir;

[0034] If the condensing pressure in the refrigerant reservoir is within the optimal condensing pressure range, the refrigerant flows to the condenser and / or regulating condenser.

[0035] If the condensing pressure in the refrigerant reservoir is less than the minimum value of the optimal condensing pressure range, the refrigerant reservoir will continue to adjust its internal pressure.

[0036] In some embodiments, when the air conditioning system operates both the first refrigeration system and the second refrigeration system simultaneously, the control method for the air conditioning system further includes:

[0037] Set the set temperatures for the first and second refrigeration systems respectively;

[0038] The system detects the indoor and outdoor temperatures in the first refrigeration system, and measures the condensing pressure of the first condenser, adjusting the condensing pressure of the condenser and the condensing pressure in the refrigerant storage tank; it also detects the indoor and outdoor temperatures in the second refrigeration system, and measures the condensing pressure of the second condenser, adjusting the condensing pressure of the condenser and the condensing pressure in the refrigerant storage tank.

[0039] Calculate the temperature difference between the set temperature of the first refrigeration system and the indoor temperature, and the temperature difference between the set temperature of the second refrigeration system and the indoor temperature;

[0040] If the temperature difference between the first refrigeration system and the second refrigeration system both meet the set value for the compressor to enter high-frequency operation, then the first compressor and the second compressor will operate at high frequency, and the condenser will be connected in parallel with the first refrigeration system and the second refrigeration system respectively.

[0041] If the temperature difference of the first refrigeration system meets the set value for the first compressor to enter high and low frequency operation, and the temperature difference of the second refrigeration system meets the set value for the second compressor to enter low frequency operation, then the first compressor operates at high frequency, the second compressor operates at low frequency, the first condenser is connected in parallel with the regulating condenser, and the second condenser is disconnected from the regulating condenser.

[0042] If the temperature difference of the first refrigeration system meets the set value for the first compressor to enter low-frequency operation, and the temperature difference of the second refrigeration system meets the set value for the second compressor to enter high-frequency operation, then the first compressor operates at low frequency, the second compressor operates at high frequency, the first condenser is disconnected from the regulating condenser, and the second condenser is connected in parallel with the regulating condenser.

[0043] If the temperature difference between the first refrigeration system and the second refrigeration system both meet the set value for the compressor to enter low-frequency operation, then both the first compressor and the second compressor will operate at low frequency, and the condenser will be disconnected from the first refrigeration system and the second refrigeration system, respectively.

[0044] The air conditioning system, air conditioner, and control method provided by this invention have the following beneficial effects:

[0045] This invention adds a regulating condenser and a refrigerant storage tank to the existing air conditioning system. When the first or second refrigeration system operates at low frequency and there is excess refrigerant, only the first or second refrigeration system operates independently, and the regulating condenser does not work; the excess refrigerant is stored in the refrigerant storage tank. When the first or second refrigeration system operates at high frequency and requires more refrigerant, it is connected in parallel with the regulating condenser, and both condensers work simultaneously to increase the condensation area. When the first and second refrigeration systems operate simultaneously, if both require a large amount of refrigerant, they are connected in parallel with the regulating condenser, and the first, second, and regulating condensers are in a connected state. The refrigerant storage tank releases refrigerant into the first, second, and regulating condensers respectively. This invention monitors and adjusts the air conditioner's operation status in a timely manner. By adjusting the refrigerant and the connected regulating condenser, the energy efficiency of the air conditioner can be effectively improved under various conditions, thereby effectively protecting the air conditioning system, regulating system pressure, preventing system overload, and ensuring that the air conditioner operates in a safer and more controllable state, while also expanding the operating temperature range of the air conditioner. Attached Figure Description

[0046] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0047] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0048] Figure 1 This is a schematic diagram of the air conditioning system of the present invention;

[0049] Figure 2 This is a flowchart illustrating the operation of the first or second refrigeration system of the present invention when running independently.

[0050] Figure 3 This is a schematic diagram of the process when the first refrigeration system and the second air conditioning system of the present invention are running simultaneously.

[0051] In the diagram: 1-First refrigeration system; 101-First condenser; 102-First compressor; 103-First evaporator; 104-First throttling device; 2-Second refrigeration system; 201-Second condenser; 202-Second compressor; 203-Second evaporator; 204-Second throttling device; 3-Regulating condenser; 4-Refrigerant storage tank; 5-Diverter valve; 61-First control element; 62-Second control element. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0056] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0057] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0058] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0059] See also Figure 1 As shown, according to an embodiment of the present invention, an air conditioning system is provided, comprising a first refrigeration system 1; a second refrigeration system 2, wherein the first refrigeration system 1 and the second refrigeration system 2 are connected in parallel; and a regulating condenser 3, wherein the regulating condenser 3 is connected in parallel with the first refrigeration system 1 and the second refrigeration system 2, and the regulating condenser 3 is connected to a refrigerant storage tank 4, wherein the first refrigeration system 1 and the second refrigeration system 2 are respectively connected to the refrigerant storage tank 4; the refrigerant storage tank 4 stores refrigerant from the first refrigeration system 1, the second refrigeration system 2 and the regulating condenser 3 respectively, or releases refrigerant to the first refrigeration system 1, the second refrigeration system 2 and the regulating condenser 3 respectively.

[0060] This invention adds a regulating condenser 3 and a refrigerant storage tank 4 to the existing air conditioning system. When the first refrigeration system 1 or the second refrigeration system 2 is operating at low frequency and there is excess refrigerant, only the first refrigeration system 1 or the second refrigeration system 2 operates alone, and the regulating condenser 3 does not work. The excess refrigerant is stored in the refrigerant storage tank 4. When the first refrigeration system 1 or the second refrigeration system 2 is operating at high frequency and requires more refrigerant, the first refrigeration system 1 or the second refrigeration system 2 is connected in parallel with the regulating condenser 3, and both condensers work simultaneously to increase the condensation area. When the first refrigeration system 1 and the second refrigeration system 2 are working simultaneously, if both the first refrigeration system 1 and the second refrigeration system 2 require a large amount of refrigerant, the first refrigeration system 1 and the second refrigeration system 2 are connected in parallel with the regulating condenser 3. The first refrigeration system 1, the second refrigeration system 2, and the regulating condenser 3 are in a connected state, and the pressure between each part is consistent. The refrigerant storage tank 4 releases the refrigerant into the first refrigeration system 1, the second refrigeration system 2, and the regulating condenser 3 respectively. This invention monitors and adjusts the air conditioner's operation status in a timely manner. By adjusting the refrigerant and the connected condenser, the energy efficiency of the air conditioner can be effectively improved under various conditions, thereby effectively protecting the air conditioning system, regulating system pressure, preventing system overload, and ensuring that the air conditioner operates in a safer and more controllable state, while also expanding the operating temperature range of the air conditioner.

[0061] The first refrigeration system 1 includes a first condenser 101, a first compressor 102, a first evaporator 103, and a first throttling device 104 connected in sequence, with the first condenser 101 connected in parallel with the regulating condenser 3; the second refrigeration system 2 includes a second condenser 201, a second compressor 202, a second evaporator 203, and a second throttling device 204 connected in sequence, with the second condenser 201 connected in parallel with the regulating condenser 3.

[0062] In this embodiment, both the first throttling element 104 and the second throttling element 204 are expansion valves, and the first refrigeration system 1 and the second refrigeration system 2 operate independently. When the first refrigeration system 1 operates independently, the first compressor 102 operates at high frequency, and the first condenser 101 and the regulating condenser 3 are connected in parallel, with the first condenser 101 and the regulating condenser 3 working simultaneously. Depending on the refrigerant demand, the refrigerant storage 4 can supply refrigerant to the first condenser 101 and the regulating condenser 3 simultaneously or individually. When the first compressor 102 operates at low frequency, only the first condenser 101 operates; if excess refrigerant is generated, the refrigerant storage 4 stores the refrigerant. The operation process of the second refrigeration system 2 operating independently is the same as that of the first refrigeration system 1. When the first refrigeration system 1 and the second refrigeration system 2 operate simultaneously, the regulating condenser 3 is connected in parallel with the first condenser 101 and the second condenser 201. If the refrigerant supplied by the first compressor 102 and the second compressor 202 is insufficient, the refrigerant storage 4 releases the refrigerant into the regulating condenser 3, the first condenser 101, and the second condenser 201, respectively. If the first compressor 102 and the second compressor 202 produce excess refrigerant, the refrigerant storage tank 4 stores the refrigerant. This invention, by changing the storage or release of refrigerant in the refrigerant storage tank 4, flexibly supplies refrigerant according to the system's operating state, making the overall system more stable. It can be adjusted based on the operating frequency of the first compressor 102 and the second compressor 202, and also by controlling the amount of refrigerant released from the refrigerant storage tank 4.

[0063] A diversion valve 5 is provided between the regulating condenser 3 and the refrigerant storage tank 4. The diversion valve 5 has at least 4 valves, which are respectively connected to the first refrigeration system 1, the second refrigeration system 2, the regulating condenser 3 and the refrigerant storage tank 4.

[0064] In this embodiment, the diversion valve 5 has four valves. The first valve is connected to the refrigerant storage tank 4 to form a first loop, the second valve is connected to the regulating condenser 3 to form a second loop, the third valve is connected to the first condenser 101 to form a third loop, and the fourth valve is connected to the second condenser 201 to form a fourth loop. When the corresponding loops are connected to the respective valves, excess refrigerant flows into the refrigerant storage tank 4 for storage, or the refrigerant in the refrigerant storage tank 4 is released into the first condenser 101, the second condenser 201, and the regulating condenser 3. In other embodiments, the number of valves can be increased according to the number of loops that need to be connected. This invention, by setting a diversion valve 5, can flexibly control the connection state between the first condenser 101, the second condenser 201, and the regulating condenser 3 and the refrigerant storage tank 4. This allows the air conditioner to operate in a safer and more controllable state according to refrigerant requirements, while also expanding the operating temperature range and reducing maintenance frequency. After a long service life, refrigerant leakage is inevitable in the system. During operation, the refrigerant is continuously regulated, ensuring it remains within a normal range to guarantee long-term stable performance, extend the air conditioner's lifespan, reduce maintenance frequency, and significantly reduce manpower and material costs.

[0065] A first control element 61 is provided between the first refrigeration system 1 and the regulating condenser 3, and a second control element 62 is provided between the second refrigeration system 2 and the regulating condenser 3.

[0066] In this embodiment, the first control element 61 and the second control element 62 are solenoid valves. When the first control element 61 is turned on, the first condenser 101 and the regulating condenser 3 are connected in parallel, and both operate simultaneously. When the second control element 62 is turned on, the second condenser 201 and the regulating condenser 3 are connected in parallel, and both operate simultaneously. When both the first control element 61 and the second control element 62 are turned on simultaneously, the regulating condenser 3 is connected in parallel with the first condenser 101 and the second condenser 201, and all three operate simultaneously. The first control element 61 and the second control element 62 provided in this invention can control the on / off state between the first refrigeration system 1, the second refrigeration system 2, and the regulating condenser 3, thereby changing the cooling area of ​​the first refrigeration system 1 and the second refrigeration system 2.

[0067] A piston is installed in the refrigerant reservoir 4, and a driving component for driving the piston to reciprocate is installed at the bottom of the refrigerant reservoir 4. This invention involves installing a piston and driving component in a conventional liquid storage tank. The piston is an electromagnet piston, and the driving component is an electromagnet. When the driving component is energized, it causes the piston to move up and down, thereby changing the pressure in the refrigerant reservoir 4.

[0068] In one specific implementation, pressure sensors are installed in the first condenser 101, the second condenser 201, the regulating condenser 3, and the refrigerant storage tank 4 to measure the pressure of each component. When the first condenser 101, the second condenser 201, and the regulating condenser 3 require refrigerant, the pressure in the refrigerant storage tank 4 is greater than the pressure in the first condenser 101, the second condenser 201, and the regulating condenser 3. The corresponding valve of the diversion valve 5 is then opened, connecting the first to the fourth circuits, thereby releasing refrigerant into each component. When the first condenser 101, the second condenser 201, and the regulating condenser 3 generate excess refrigerant, the pressure in the refrigerant storage tank 4 is less than the pressure in the first condenser 101, the second condenser 201, and the regulating condenser 3. The corresponding valve of the diversion valve 5 is then opened, and the refrigerant from each component flows into the refrigerant storage tank 4 for storage. This invention uses a moving piston to change the pressure in the refrigerant reservoir 4. The valve of the diversion valve 5 is only opened when the pressure in the refrigerant reservoir 4 is detected by the pressure sensor as being equal to the pressure required to release or store refrigerant. This prevents the pressure on the refrigerant reservoir 4 from being too low when the valve is opened, which could lead to system instability.

[0069] An air conditioner includes an air conditioning system, wherein the air conditioning system is the air conditioning system described above.

[0070] Please refer to the above. Figure 2 and Figure 3 A control method for an air conditioning system, wherein the air conditioning system is as described above, and the control method for the air conditioning system includes the following:

[0071] Step S1: Receive the air conditioning system's operation command, which is the air conditioning system's start-up command;

[0072] Step S2: Control the air conditioning system to operate the first refrigeration system 1 alone, the second refrigeration system 2 alone, or the first refrigeration system 1 and the second refrigeration system 2 simultaneously, according to the received instructions;

[0073] Step S3: According to the operating mode of the air conditioning system, the refrigerant storage 4 stores the refrigerant from the first refrigeration system 1, the second refrigeration system 2 and the regulating condenser 3 respectively, or releases the refrigerant into the first refrigeration system 1, the second refrigeration system 2 and the regulating condenser 3 respectively.

[0074] In step S2, when the air conditioning system operates alone in the first refrigeration system 1 mode or alone in the second refrigeration system 2 mode, the control method of the air conditioning system further includes:

[0075] Step S21: Set the current refrigeration system's set temperature a;

[0076] Step S22: Detect the indoor temperature b, the outdoor temperature c, and the condensing pressure value d of the condenser in the current refrigeration system; adjust the condensing pressure value e of the condenser 3 and the condensing pressure value f in the refrigerant storage tank 4.

[0077] Step S23: If the temperature difference between the current set temperature a of the refrigeration system and the indoor temperature b meets the set value q for the compressor to enter high-frequency operation, then the compressor will operate at high frequency.

[0078] In step S23, when the compressor is running at high frequency, the control method for the air conditioning system further includes:

[0079] When the corresponding control element is turned on, the condenser of the current refrigeration system and the regulating condenser 3 are connected in parallel. When the valve of the distributor is opened, the corresponding circuit is connected. The current condenser and the regulating condenser 3 simultaneously supply refrigerant to the compressor.

[0080] The optimal condensing pressure range for the air conditioning system is X1 to X2;

[0081] If the condensing pressure value d of the condenser and the condensing pressure value e of the regulating condenser 3 are both within the optimal condensing pressure value range X1 to X2, then the condenser and the regulating condenser 3 simultaneously supply refrigerant to the compressor. At this time, the condenser and the regulating condenser 3 do not need the refrigerant storage tank 4 to supply refrigerant, and the regulating condenser 3 plays the role of increasing the condensing area.

[0082] If the condensing pressure value d of the condenser and / or the condensing pressure value e of the regulating condenser 3 are less than the minimum value X1 of the optimal condensing pressure range, first check the condensing pressure value f in the refrigerant reservoir 4. If the condensing pressure value f in the refrigerant reservoir 4 is within the optimal condensing pressure range X1 to X2, that is, the pressure in the refrigerant reservoir 4 is greater than the current pressure in the condenser reservoir and the regulating condenser 3, then the refrigerant flows into the condenser and the regulating condenser 3. If the condensing pressure value f in the refrigerant reservoir 4 is less than the minimum value X1 of the optimal condensing pressure range, then the refrigerant reservoir 4 continues to adjust its internal pressure, and the piston reciprocates to compress air until the pressure in the refrigerant reservoir 4 is within the optimal condensing pressure range X1 to X2. Then, open the valve of the diversion valve 5 to release the refrigerant from the refrigerant reservoir 4.

[0083] Step S24: If the temperature difference between the current set temperature a of the refrigeration system and the indoor temperature b meets the set value for the compressor to enter low-frequency operation, that is, it is not within the set value q for the compressor to enter high-frequency operation, then the compressor will operate at low frequency. At this time, it means that the indoor temperature b has approached the set temperature a of the refrigeration system, and the air conditioning system needs to operate at a reduced frequency. The cooling capacity is reduced, and the amount of refrigerant and the refrigerant area required by the refrigeration system can be reduced accordingly, thereby reducing the power of the refrigeration system.

[0084] In step S24, when the compressor is running at low frequency, the control method for the air conditioning system further includes:

[0085] The corresponding control elements are in the off state. The condenser of the current refrigeration system is disconnected from the regulating condenser 3, and only the condenser supplies refrigerant to the compressor.

[0086] If the condenser's condensing pressure value d is within the optimal condensing pressure range X1 to X2, then the condenser supplies refrigerant to the compressor.

[0087] If the condensing pressure value d of the condenser is less than the minimum value X1 of the optimal condensing pressure range, the condensing pressure value f in the refrigerant reservoir 4 is detected. If the condensing pressure value f in the refrigerant reservoir 4 is within the optimal condensing pressure range X1 to X2, then the refrigerant flows into the condenser; if the condensing pressure value f in the refrigerant reservoir 4 is less than the minimum value X1 of the optimal condensing pressure range, then the refrigerant reservoir 4 continues to adjust its internal pressure.

[0088] In step S2, when the air conditioning system is simultaneously operating the first refrigeration system 1 and the second refrigeration system 2, the control method for the air conditioning system further includes:

[0089] Step S201: Set the set temperatures a1 and a2 of the first refrigeration system 1 and the second refrigeration system 2 respectively;

[0090] Step S202: Detect the indoor temperature b1 and outdoor temperature c1 in the first refrigeration system 1, and detect the condensing pressure d1 of the first condenser 101, adjust the condensing pressure e1 of the condenser 3, and the condensing pressure f in the refrigerant storage tank 4; Detect the indoor temperature b2 and outdoor temperature c2 in the second refrigeration system 2, and detect the condensing pressure d2 of the second condenser 201, adjust the condensing pressure e of the condenser 3, and the condensing pressure f in the refrigerant storage tank 4;

[0091] Step S203: Calculate the temperature difference between the set temperature a1 of the first refrigeration system 1 and the indoor temperature b1, and the temperature difference between the set temperature a2 of the second refrigeration system 2 and the indoor temperature b2.

[0092] Step S204: If the temperature difference between the first refrigeration system 1 and the second refrigeration system 2 both meet the set value q for the compressor to enter high-frequency operation, then the first compressor 102 and the second compressor 202 will operate at high frequency, and the first control element 61 and the second control element 62 will both be in the open state. Adjust the condenser 3 to be connected in parallel with the first refrigeration system 1 and the second refrigeration system 2 respectively. At this time, the refrigerant circulation volume and condensation area of ​​the two systems can be adjusted at the same time, and the energy efficiency is greatly increased compared with ordinary air conditioning systems.

[0093] Step S205: If the temperature difference of the first refrigeration system 1 meets the set value q for the first compressor 102 to enter high and low frequency operation, and the temperature difference a2 of the second refrigeration system 2 meets the set value for the second compressor 202 to enter low frequency operation, then the first compressor 102 operates at high frequency, the second compressor 202 operates at low frequency, the first control element 61 is turned on, the second control element 62 is turned off, the first condenser 101 is connected in parallel with the regulating condenser 3, and the second condenser 201 is disconnected from the regulating condenser 3.

[0094] Step S206: If the temperature difference of the first refrigeration system 1 meets the set value for the first compressor 102 to enter low-frequency operation, and the temperature difference of the second refrigeration system 2 meets the set value q for the second compressor 202 to enter high-frequency operation, then the first compressor 102 operates at low frequency, the second compressor 202 operates at high frequency, the first control element 61 is turned off, the second control element 62 is turned on, the first condenser 101 is disconnected from the regulating condenser 3, and the second condenser 201 is connected in parallel with the regulating condenser 3;

[0095] Step S207: If the temperature differences a1 and a2 of the first refrigeration system 1 and the second refrigeration system 2 both meet the set values ​​for the compressor to enter low-frequency operation, then the first compressor 102 and the second compressor 202 both operate at low frequency, the first control element 61 and the second control element 62 are turned off, and the condenser 3 is adjusted to disconnect from the first refrigeration system 1 and the second refrigeration system 2 respectively.

[0096] When the first compressor 102 and the second compressor 202 are in high-frequency motion, the first compressor 102 and the second compressor 202 proceed to step S23; when the first compressor 102 and the second compressor 202 are in low-frequency motion, the first compressor 102 and the second compressor 202 proceed to step S24.

[0097] This invention features two refrigeration systems, each used by two separate users. The two systems can share the regulating condenser 3 and refrigerant storage tank 4, significantly improving utilization. Since each user has different cooling needs and usage times, even simultaneous use allows for staggered adjustments, greatly enhancing equipment efficiency. When two users are using the system simultaneously (both requiring cooling), they share the regulating condenser 3. The refrigerant storage tank 4 simultaneously releases refrigerant into both the first refrigeration system 1 and the second refrigeration system 2, ensuring simultaneous high-frequency operation of both systems. This air conditioning system can also stagger the high and low frequency periods of the two systems. When one user is operating at high frequency, the other is operating at low frequency. In this case, the regulating condenser 3 is connected in parallel only with the high-frequency system and disconnected from the low-frequency system. This invention's staggered use of the parallel regulating condenser 3 and refrigerant storage tank 4 allows for timely adjustments based on the cooling needs of the two users, effectively saving energy and reducing costs.

[0098] Furthermore, the added regulating condenser 3 and refrigerant reservoir 4 also serve to protect the system. During hot summers, when air conditioners operate at high temperatures, most will shut down due to excessive system pressure, causing inconvenience to users. However, this invention, when the condensing pressure is too high, can reduce the system pressure by opening the valve to regulate the condenser 3 in parallel, while simultaneously adjusting the refrigerant circulation rate. This allows the air conditioner to operate continuously under high-temperature conditions, expanding its operating temperature range. This not only effectively protects the system but also significantly improves the user experience.

[0099] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0100] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. An air conditioning system, characterized in that, include: First refrigeration system (1); The second refrigeration system (2) is provided in parallel with the first refrigeration system (1); A regulating condenser (3) is connected in parallel with the first refrigeration system (1) and the second refrigeration system (2). The regulating condenser (3) is connected to a refrigerant storage tank (4), and the first refrigeration system (1) and the second refrigeration system (2) are respectively connected to the refrigerant storage tank (4). The refrigerant storage tank (4) stores the refrigerant from the first refrigeration system (1), the second refrigeration system (2) and the regulating condenser (3) respectively, or releases the refrigerant into the first refrigeration system (1), the second refrigeration system (2) and the regulating condenser (3) respectively. A flow divider valve (5) is provided between the regulating condenser (3) and the refrigerant storage tank (4). The first refrigeration system (1) includes a first condenser (101), a first compressor (102), a first evaporator (103), and a first throttling device (104) connected in sequence. The first condenser (101) is connected in parallel with the regulating condenser (3) and is connected to the flow divider valve (5). The second refrigeration system (2) includes a second condenser (201), a second compressor (202), a second evaporator (203), and a second throttling device (204) connected in sequence. The second condenser (201) is connected in parallel with the regulating condenser (3) and is connected to the diverter valve (5).

2. The air conditioning system according to claim 1, characterized in that, The diversion valve (5) has at least four valves, which are respectively connected to the first refrigeration system (1), the second refrigeration system (2), the regulating condenser (3) and the refrigerant storage tank (4); A first control element (61) is provided between the first refrigeration system (1) and the regulating condenser (3), and a second control element (62) is provided between the second refrigeration system (2) and the regulating condenser (3).

3. The air conditioning system according to claim 1 or 2, characterized in that, A piston is provided in the refrigerant reservoir (4), and a driving component for driving the piston to reciprocate is provided at the bottom of the refrigerant reservoir (4).

4. An air conditioner, characterized in that, Includes an air conditioning system, wherein the air conditioning system is the air conditioning system according to any one of claims 1 to 3.

5. A control method for an air conditioning system, characterized in that, The air conditioning system is the air conditioning system according to any one of claims 1 to 3, and the control method of the air conditioning system includes the following: Receive operating instructions from the air conditioning system; According to the received instructions, the air conditioning system can be controlled to operate the first refrigeration system (1) alone, operate the second refrigeration system (2) alone, or operate the first refrigeration system (1) and the second refrigeration system (2) simultaneously. According to the operating mode of the air conditioning system, the refrigerant storage (4) stores the refrigerant from the first refrigeration system (1), the second refrigeration system (2) and the regulating condenser (3) respectively, or releases the refrigerant into the first refrigeration system (1), the second refrigeration system (2) and the regulating condenser (3) respectively.

6. The control method for an air conditioning system according to claim 5, characterized in that, When the air conditioning system operates the first refrigeration system (1) alone or the second refrigeration system (2) alone, the control method of the air conditioning system further includes: Set the current set temperature of the refrigeration system; Detect the indoor temperature, outdoor temperature, and detect the condensing pressure value of the condenser in the current refrigeration system, the condensing pressure value of the regulating condenser (3), and the condensing pressure value in the refrigerant storage tank (4); If the temperature difference between the current set temperature of the refrigeration system and the indoor temperature meets the set value for the compressor to enter high-frequency operation, then the compressor will operate at high frequency. If the temperature difference between the current set temperature of the refrigeration system and the indoor temperature meets the set value for the compressor to enter low-frequency operation, then the compressor will operate at low frequency.

7. The control method for an air conditioning system according to claim 6, characterized in that, When the compressor is running at high frequency, the control method of the air conditioning system further includes: The condenser of the current refrigeration system is connected in parallel with the regulating condenser (3), and the condenser and the regulating condenser (3) simultaneously supply refrigerant to the compressor; If the condensing pressure of the condenser and the condensing pressure of the regulating condenser (3) are both within the optimal condensing pressure range, then the condenser and the regulating condenser (3) simultaneously supply refrigerant to the compressor. If the condensing pressure value of the condenser and / or the condensing pressure value of the regulating condenser (3) is less than the minimum value of the optimal condensing pressure range, the refrigerant is released into the condenser and / or the regulating condenser (3) according to the condensing pressure value in the refrigerant reservoir (4).

8. The control method for an air conditioning system according to claim 6, characterized in that, When the compressor operates at low frequency, the control method of the air conditioning system further includes: The condenser of the current refrigeration system is disconnected from the regulating condenser (3), and the condenser supplies refrigerant to the compressor; If the condenser's condensing pressure is within the optimal condensing pressure range, the condenser will supply refrigerant to the compressor. If the condensing pressure of the condenser is less than the minimum value of the optimal condensing pressure range, the refrigerant is released into the condenser according to the condensing pressure value in the refrigerant storage container (4).

9. The control method for an air conditioning system according to claim 7 or 8, characterized in that, The steps for determining the condensing pressure value in the refrigerant reservoir (4) include: Detect the condensing pressure value in the refrigerant storage tank (4); If the condensing pressure value in the refrigerant reservoir (4) is within the optimal condensing pressure range, the refrigerant flows to the condenser and / or regulating condenser (3); If the condensing pressure value in the refrigerant reservoir (4) is less than the minimum value of the optimal condensing pressure range, the refrigerant reservoir (4) continues to adjust its internal pressure.

10. The control method for an air conditioning system according to claim 5, characterized in that, When the air conditioning system operates the first refrigeration system (1) and the second refrigeration system (2) simultaneously, the control method of the air conditioning system further includes: Set the set temperatures of the first refrigeration system (1) and the second refrigeration system (2) respectively; The indoor temperature and outdoor temperature in the first refrigeration system (1) are detected, and the condensing pressure of the first condenser (101), the condensing pressure of the regulating condenser (3), and the condensing pressure in the refrigerant storage tank (4) are detected; the indoor temperature and outdoor temperature in the second refrigeration system (2) are detected, and the condensing pressure of the second condenser (201), the condensing pressure of the regulating condenser (3), and the condensing pressure in the refrigerant storage tank (4) are detected; Calculate the temperature difference between the set temperature of the first refrigeration system (1) and the indoor temperature, and the temperature difference between the set temperature of the second refrigeration system (2) and the indoor temperature; If the temperature difference between the first refrigeration system (1) and the second refrigeration system (2) both meet the set value for the compressor to enter high-frequency operation, then the first compressor (102) and the second compressor (202) will operate at high frequency, and the regulating condenser (3) will be connected in parallel with the first refrigeration system (1) and the second refrigeration system (2) respectively. If the temperature difference of the first refrigeration system (1) meets the set value for the first compressor (102) to enter high-frequency operation, and the temperature difference of the second refrigeration system (2) meets the set value for the second compressor (202) to enter low-frequency operation, then the first compressor (102) operates at high frequency, the second compressor (202) operates at low frequency, the first condenser (101) is connected in parallel with the regulating condenser (3), and the second condenser (201) is disconnected from the regulating condenser (3); If the temperature difference of the first refrigeration system (1) meets the set value for the first compressor (102) to enter low-frequency operation, and the temperature difference of the second refrigeration system (2) meets the set value for the second compressor (202) to enter high-frequency operation, then the first compressor (102) operates at low frequency, the second compressor (202) operates at high frequency, the first condenser (101) is disconnected from the regulating condenser (3), and the second condenser (201) is connected in parallel with the regulating condenser (3); If the temperature difference between the first refrigeration system (1) and the second refrigeration system (2) both meet the set value for the compressor to enter low-frequency operation, then the first compressor (102) and the second compressor (202) both operate at low frequency, and the regulating condenser (3) is disconnected from the first refrigeration system (1) and the second refrigeration system (2) respectively.

Images