Air conditioner

Abstract

The invention discloses an air conditioner. A heat exchange system comprises a compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger and a throttling device. The liquid storage device is arranged between the indoor heat exchanger and the outdoor heat exchanger and comprises a shell and a telescopic pipeline, a containing cavity used for containing refrigerants is formed in the shell, an air inlet is formed in the bottom of the shell, an air outlet is formed in the top of the shell, the air inlet is connected with the indoor heat exchanger, and the telescopic pipeline is arranged in the air outlet. One end of the telescopic pipeline communicates with the containing cavity, the other end of the telescopic pipeline is connected with the outdoor heat exchanger, and the telescopic pipeline moves up and down along the air outlet so as to adjust the length of the telescopic pipeline stretching into the containing cavity and adjust the amount of refrigerants participating in heating circulation, so that the amount of circulating refrigerants is adjusted, and the requirements of the system for the refrigerants in different states are met. The system performance and reliability are improved, and the user experience is improved.

Description

Technical Field

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

[0002] The air conditioner performs the air conditioner's refrigeration cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0003] Due to the difference in volume between the indoor and outdoor heat exchangers, the optimal amount of refrigerant required by the air conditioner system for cooling and heating is different. Usually, the total amount of refrigerant required for heating is less than that for cooling. During product development, in order to balance the difference in refrigerant amount for cooling and heating, a liquid accumulator is usually added to the air conditioning system to store part of the refrigerant during operation. However, this can only achieve the optimal balance effect under specific operating conditions and cannot dynamically adjust the circulation volume under other operating conditions.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In response to the problems pointed out in the background technology, the present invention proposes an air conditioner, which adjusts the amount of circulating refrigerant by controlling the retractable pipeline of the liquid storage tank to meet the system's demand for refrigerant under different conditions, improve system performance and reliability, and enhance user experience.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: In some embodiments of the present application, an air conditioner is provided, comprising: A heat exchange system, which includes a compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger, and a throttling device; A liquid storage device, which is arranged between the indoor heat exchanger and the outdoor heat exchanger, comprises: A shell, in which a receiving cavity for containing refrigerant is formed, an air inlet is arranged at the bottom of the shell, and an air outlet is arranged at the top, and the air inlet is connected to the indoor heat exchanger; A telescopic pipeline is arranged in the air outlet, one end of the telescopic pipeline is connected to the accommodating chamber, and the other end is connected to the outdoor heat exchanger. The telescopic pipeline moves up and down along the air outlet to adjust the length of the telescopic pipeline extending into the accommodating chamber to adjust the amount of refrigerant participating in the heating cycle.

[0007] By controlling the retractable pipe inside the liquid storage tank, the amount of circulating refrigerant can be adjusted to meet the system's demand for refrigerant in different states, improve system performance and reliability, and enhance user experience.

[0008] In some embodiments, the liquid reservoir is disposed in a vertical position between the indoor heat exchanger and the outdoor heat exchanger.

[0009] In some embodiments, it also includes a telescoping control unit and an analysis control module; The analysis control module is used to collect the operating parameters of the air conditioner, determine the operating load of the heat exchange system, and determine the demand for refrigerant by the heat exchange system under different operating loads; The telescopic control unit controls the telescopic pipeline to move upward or downward along the air outlet according to the demand amount of refrigerant, so as to adjust the amount of refrigerant participating in the heating cycle.

[0010] In some embodiments, the exhaust superheat of the compressor is Tdsh and the exhaust pressure is Pd; When the air conditioner is heating, the analysis and control module first enters the first detection item to determine whether Pd<a1 and Tdsh>b1 and the duration is t1. If so, the telescopic control unit controls the telescopic pipeline to extend downward along the air outlet; if not, the analysis and control module enters the second detection item; Under the second detection item, the analysis control module determines whether Pd>a3 and Tdsh<b3 and the duration is t2. If so, the telescopic control unit controls the telescopic pipeline to contract upward along the air outlet; if not, the telescopic pipeline does not move; When the telescopic control unit controls the telescopic pipeline to extend downward, the analysis control module enters the third detection item to determine whether Pd>a2 or Tdsh<b2 or the telescopic pipeline moves downward to the limit position. If so, the telescopic pipeline stops moving downward; if not, the telescopic pipeline continues to move downward; When the telescopic control unit controls the telescopic pipeline to contract upward, the analysis control module enters the fourth detection item; Under the fourth detection item, the analysis and control module determines whether Pd<a4 or Tdsh>b4 or the telescopic pipeline moves upward to the limit position. If so, the telescopic pipeline stops moving upward; if not, the telescopic pipeline continues to move upward.

[0011] In some embodiments, when the air conditioner is heating, ΔTe is the change in temperature of the refrigerant flowing into the outdoor heat exchanger during time t3, and ΔPs is the change in suction pressure of the compressor during time t4; The analysis control module first enters the fifth detection item to determine whether △Te<c1 or △Ps<d1. If so, the telescopic control unit controls the telescopic pipeline to extend downward; if not, the telescopic pipeline does not move; When the telescopic control unit controls the telescopic pipeline to move downward, the analysis control module enters the sixth detection item to determine whether △Te>c2 or △Ps>d2 or the telescopic pipeline moves downward to the limit position. If so, the telescopic pipeline stops moving; if not, the telescopic pipeline continues to move downward.

[0012] In some embodiments, when the air conditioner is cooling, the telescopic control unit controls the telescopic pipe to contract upward to an extreme position.

[0013] In some embodiments, when the air conditioner is started or switched to cooling mode, it is first determined whether the telescopic pipe is in the contraction limit position. If so, the telescopic pipe maintains this position; if not, the telescopic pipe contracts upward to the limit position.

[0014] In some embodiments, the indoor heat exchanger is a coil fin type heat exchanger or a water heat exchanger.

[0015] In some embodiments, the telescopic pipeline is sealed and connected to the air outlet, and the telescopic pipeline is a sleeve structure.

[0016] The present invention also provides an air conditioner, comprising: A heat exchange system, comprising a compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger, a throttling device, and a liquid reservoir, wherein the liquid reservoir is arranged between the indoor heat exchanger and the outdoor heat exchanger; A telescopic pipe is provided in the top air outlet of the liquid reservoir, one end of the telescopic pipe is connected to the inner cavity of the liquid reservoir, and the other end is connected to the outdoor heat exchanger. The telescopic pipe moves up and down along the air outlet to adjust the amount of refrigerant stored in the liquid reservoir when the air conditioner is heating.

[0017] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 is a schematic diagram of the principle of the heat exchange system of the air conditioner according to the first embodiment; Figure 2 It is a schematic diagram of the refrigerant flow path in the heat exchange system of the air conditioner during cooling according to the first embodiment; Figure 3 A schematic diagram of a refrigerant flow path in a heat exchange system of an air conditioner in heating mode according to Embodiment 1; Figure 4 is a schematic diagram of the principle of the heat exchange system of the air conditioner according to the second embodiment; Figure 5 is a schematic structural diagram of a liquid reservoir according to an embodiment; Figure 6 is a schematic structural diagram of the telescopic pipeline of the liquid storage device according to the embodiment when it is retracted upward; Figure 7 is a schematic structural diagram of a telescopic pipeline of a liquid storage device according to an embodiment when the telescopic pipeline is extended downward; Figure 8 is a control flow chart of the liquid storage device when the air conditioner is heating according to the embodiment; Fig. 9 A control flow chart of a liquid storage device during heating of an air conditioner according to another embodiment; Fig.10 is a control flow chart of a liquid accumulator during cooling of an air conditioner according to an embodiment; Reference numerals: 1. Compressor; 2. Reversing valve; 3. Outdoor heat exchanger; 4. Indoor heat exchanger; 5. Liquid storage tank; 51. Shell; 52. Air inlet; 53. Air outlet; 54. Telescopic pipeline; 55. Telescopic control unit; 6. Analysis and control module; 71. External ring temperature sensor; 72. Internal ring temperature sensor; 73. Refrigerant temperature sensor; 74. Exhaust temperature sensor; 75. Exhaust pressure sensor; 76. Intake temperature sensor; 77. Water temperature sensor. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0026] In the present application, the air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool or heat the indoor space.

[0027] The low-temperature and low-pressure refrigerant enters the compressor, which compresses it into high-temperature and high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0028] The expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature and low-pressure refrigerant gas to the compressor. The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the indoor space.

[0029] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

[0030] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0031] Reference Figure 1 The system consisting of the compressor 1, the reversing valve 2, the outdoor heat exchanger 3, the indoor heat exchanger 4, the throttling device, and the liquid accumulator 5 is called a heat exchange system. That is, the air conditioner in this embodiment is an air conditioner with a liquid accumulator 5, and the liquid accumulator 5 is arranged between the indoor heat exchanger 4 and the outdoor heat exchanger 3.

[0032] The reason why the heat exchange system is provided with a liquid accumulator 5 is that due to the difference in the internal volume of the indoor heat exchanger 4 and the outdoor heat exchanger 3 of the air conditioner, the optimal amount of refrigerant required by the heat exchange system during cooling and heating is different, and the total amount of refrigerant required during heating is usually less than the total amount of refrigerant required during cooling. In order to balance the difference in the amount of refrigerant for cooling and heating during product development, a liquid accumulator 5 is added to the heat exchange system. The liquid accumulator 5 is used to store a portion of the refrigerant when the air conditioner is in heating operation.

[0033] In other words, the liquid accumulator 5 is used to store liquid refrigerant. For the same heat exchange cycle system, more refrigerant is required for cooling than for heating. For the air conditioner with the liquid accumulator 5, the refrigerant is usually filled when cooling is optimal, and the excess refrigerant is stored in the liquid accumulator 5 when the air conditioner is heating. The liquid accumulator 5 does not need to store refrigerant when the air conditioner is heating.

[0034] The liquid storage device 5 in the prior art can only meet the optimal balance effect under a specific working condition, and cannot dynamically adjust the circulation volume under other working conditions.

[0035] In order to solve this problem, this embodiment improves the structure of the liquid reservoir 5 and further optimizes the control method of the liquid reservoir 5.

[0036] Specifically, the structure of the liquid storage device 5 is as follows: Figures 5 to 7 As shown, the liquid accumulator 5 comprises a shell 51, and a receiving cavity for containing refrigerant is formed in the shell 51. An air inlet 52 is arranged at the bottom of the shell 51, and an air outlet 53 is arranged at the top.

[0037] This embodiment does not limit the structural appearance of the housing 51. Figure 5 The middle shell 51 is an elongated structure as a whole, and the upper and lower ends of the shell 51 are tapered structures, and the air inlet 52 and the air outlet 53 are arranged on the tapered structures. The tapered structures at the air inlet 52 and the air outlet 53 play a certain guiding role in the flow of the refrigerant.

[0038] A telescopic pipe 54 is arranged in the top air outlet 53 of the liquid storage device 5, and the telescopic pipe 54 can move up and down along the air outlet 53. By moving the telescopic pipe 54 up and down along the air outlet 53, the length of the telescopic pipe 54 extending into the accommodating cavity can be adjusted, thereby adjusting the amount of refrigerant participating in the heating cycle.

[0039] Refer to Figure 1 or Figure 3 The liquid reservoir 5 is arranged between the indoor heat exchanger 4 and the outdoor heat exchanger 3, the bottom air inlet 52 of the liquid reservoir 5 is connected to the indoor heat exchanger 4, the telescopic pipe 54 serves as the top outlet of the liquid reservoir 5, one end of the telescopic pipe 54 is connected to the internal accommodating cavity of the liquid reservoir 5, and the other end is connected to the outdoor heat exchanger 3.

[0040] The indoor heat exchanger 4 can heat the air ( Figure 1 ), can also be used for water heat exchange ( Figure 4 ), if it is air heat exchange, it is a coil fin type heat exchanger (the heat exchange medium is air); if it is water heat exchange, it is a plate heat exchanger or other type of heat exchanger (the heat exchange medium is water).

[0041] Taking the indoor heat exchanger 4 as an example for air heat exchange, the refrigeration cycle is as follows Figure 2As shown, the reversing valve 2 connects the exhaust pipe of the compressor 1 to the outdoor heat exchanger 3 and connects the suction pipe to the indoor heat exchanger 4. Figure 2 The direction of the middle arrow is the flow direction of the refrigerant. The refrigerant is discharged from the compressor 1, passes through the reversing valve 2, the outdoor heat exchanger 3, the liquid storage tank 5, the indoor heat exchanger 4, the reversing valve 2, and returns to the compressor 1.

[0042] Heating cycle Figure 3 As shown, the reversing valve 2 connects the exhaust pipe of the compressor 1 to the indoor heat exchanger 4, and connects the suction pipe to the outdoor heat exchanger 3. Figure 3 The direction of the middle arrow is the direction of the refrigerant. The refrigerant is discharged from the compressor 1, passes through the reversing valve 2, the indoor heat exchanger 4, the liquid storage tank 5, the outdoor heat exchanger 3, the reversing valve 2, and returns to the compressor 1.

[0043] The following combination Figure 6 and Figure 7 , the process of regulating the refrigerant in the liquid storage device 5 is explained.

[0044] The liquid accumulator 5 is installed vertically between the indoor heat exchanger 4 and the outdoor heat exchanger 3, that is, the shell 51 of the liquid accumulator 5 is installed in a vertical posture, and the telescopic pipe 54 is located at the top. During cooling, under the action of gravity, all the refrigerant participates in the circulation. During heating, the liquid refrigerant will first fill the effective volume of the liquid accumulator 5, and then be discharged from the liquid accumulator 5 to participate in the circulation. In this way, the refrigerant in the effective volume will be stored in the liquid accumulator 5 during heating, which plays a role in balancing the amount of refrigerant during cooling and heating.

[0045] The effective volume of the liquid reservoir 5 refers to the volume between the bottom port of the telescopic pipe 54 and the bottom of the liquid reservoir 5 .

[0046] The working mode of the liquid reservoir 5 is adjusted only during heating, and the effective volume of the liquid reservoir 5 is adjusted by adjusting the telescopic position of the telescopic pipe 54. By extending or contracting the telescopic pipe 54, the distance between the bottom port of the telescopic pipe 54 and the bottom air inlet 52 of the liquid reservoir 5 is adjusted, thereby adjusting the effective volume of the liquid reservoir 5.

[0047] Specifically, when the telescopic pipe 54 moves upward along the gas outlet 53, Figure 6 The bottom port of the telescopic pipe 54 moves toward the direction close to the air outlet 53, and the telescopic pipe 54 contracts upward. At this time, the distance between the bottom port of the telescopic pipe 54 and the air inlet 52 increases, thereby achieving the effect of increasing the effective volume of the liquid reservoir 5.

[0048] Figure 6In the figure, the bottom port of the telescopic pipe 54 moves upward and contracts into the air outlet 53. When heating, the effective volume of the liquid reservoir 5 is the internal volume of the entire liquid reservoir 5. At this time, the effective volume of the liquid reservoir 5 reaches the maximum. When the system is stable, the liquid refrigerant (shaded part) will fill the entire liquid reservoir 5.

[0049] When the telescopic pipe 54 moves downward along the air outlet 53, Figure 7 The bottom port of the telescopic pipe 54 moves in a direction away from the air outlet 53, and the telescopic pipe 54 extends downward. At this time, the distance between the bottom port of the telescopic pipe 54 and the air inlet 52 is reduced, thereby achieving the effect of reducing the effective volume of the liquid reservoir 5.

[0050] Figure 7 In the figure, the bottom port of the telescopic pipe 54 moves downward and extends to the middle position of the liquid reservoir 5. When heating, the effective volume of the liquid reservoir 5 becomes half of the internal volume of the liquid reservoir 5. When the system is stable, the liquid refrigerant (shaded part) only fills half of the liquid reservoir 5, and the part above the bottom port of the telescopic pipe 54 is a cavity without refrigerant filling.

[0051] The amount of extension or contraction of the telescopic pipe 54 depends on the amount of refrigerant required by the heat exchange system when the air conditioner is heating.

[0052] The extension or contraction movement of the telescopic pipe 54 is controlled by the telescopic control unit 55, so as to realize the automatic contraction control movement of the telescopic pipe 54 and realize the automatic adjustment of the refrigerant amount.

[0053] The telescopic control unit 55 can be integrated outside the shell 51 of the liquid reservoir 5 to facilitate communication and control with the telescopic pipeline 54 .

[0054] In some embodiments, the liquid storage device 5 is disposed between the indoor heat exchanger 4 and the outdoor heat exchanger 3 in a vertical position, with the air inlet 52 facing downward and the air outlet 53 facing upward. In this way, during cooling, the refrigerant will all participate in the refrigeration cycle under the action of gravity, and no refrigerant will be stored in the liquid storage device 5; during heating, the length of the telescopic pipe 54 extending into the accommodating cavity can be adjusted by adjusting the up and down movement of the telescopic pipe 54 along the air outlet 53, thereby adjusting the amount of refrigerant participating in the heating cycle.

[0055] The vertical installation posture of the liquid reservoir 5 is more effective in adjusting the amount of refrigerant, ensuring that the refrigerant in the liquid reservoir 5 can all flow out of the liquid reservoir 5 under the action of gravity during cooling and participate in the refrigeration cycle; during heating, when the telescopic pipe 54 moves up and down along the air outlet 53, the effective volume adjustment of the liquid reservoir 5 is more direct and effective.

[0056] In some embodiments, the air conditioner further includes a telescopic control unit 55 and an analysis control module 6 .

[0057] The analysis control module 6 is used to collect the operating parameters of the air conditioner, determine the operating load of the heat exchange system, and determine the demand for refrigerant of the heat exchange system under different operating loads.

[0058] The telescopic control unit 55 controls the telescopic pipe 54 to move upward or downward along the air outlet 53 according to the demand for refrigerant, and controls the telescopic movement of the telescopic pipe 54 to adjust the amount of refrigerant participating in the heating cycle, so that the circulation system has the optimal amount of refrigerant under various load conditions, thereby achieving the purpose of adjustable refrigerant and improving the reliability of the unit.

[0059] The analysis and control module 6 detects and collects the operating parameters of the air conditioner through various sensors.

[0060] The sensors include but are not limited to the outer ring temperature sensor 71 (Tao), the inner ring temperature sensor 72 (Tai), the refrigerant temperature sensor 73 (Te), the exhaust temperature sensor 74 (Td), the exhaust pressure sensor 75 (Pd), the intake temperature sensor 76 (Ps), and the water temperature sensor 77 (Tw).

[0061] The external temperature sensor 71 is located around the outdoor unit and is used to detect the ambient temperature Tao of the outdoor unit when the unit is running.

[0062] The internal ambient temperature sensor 72 is located around the indoor unit and is used to detect the ambient temperature Tai of the indoor unit when the unit is running.

[0063] The refrigerant temperature sensor 73 is located on the air inlet pipe of the outdoor heat exchanger 33 and is used to detect the temperature Te of the refrigerant flowing into the outdoor heat exchanger 33 when the unit is in heating operation.

[0064] The exhaust temperature sensor 74 is located on the exhaust pipe of the compressor 11 and is used to detect the exhaust temperature Td of the compressor 1 and calculate the exhaust superheat Tdsh.

[0065] The exhaust pressure sensor 75 is used to detect the exhaust pressure Pd of the compressor 1 .

[0066] The suction pressure sensor 76 is used to detect the suction pressure Ps of the compressor 1 .

[0067] If the indoor heat exchanger 44 is a water heat exchanger, a water temperature sensor 77 needs to be installed on the water side water inlet or outlet pipe to detect the water temperature Tw of the exchanged water.

[0068] This application provides two control methods for adjusting the refrigerant when the unit is heating.

[0069] The first embodiment of refrigerant regulation during heating is as follows: Figure 8 As shown, the exhaust superheat of compressor 1 is Tdsh and the exhaust pressure is Pd.

[0070] When the air conditioner is heating, the analysis control module 6 collects the operating parameters of each component of the unit, makes a system load judgment, and enters the first detection item first; Under the first detection item, it is determined whether Pd<a1 and Tdsh>b1 and the duration is t1. If so, it is determined that the circulating refrigerant in the system is small, and the telescopic control unit 55 controls the telescopic pipe 54 to extend downward along the air outlet 53, and the telescopic pipe 54 extends; if not, the analysis control module 6 enters the second detection item; Extension control, specifically, the analysis control module 6 sends an extension control signal to the telescopic control unit 55, and the telescopic control unit 55 drives the telescopic pipe 54 to extend, which is manifested in the unit as the telescopic pipe 54 moving downward along the air outlet 53. The control method can be gear control, step control or other control methods. After the extension control, the third detection item is entered; Under the second detection item, the analysis control module 6 determines whether Pd>a3 and Tdsh<b3 and the duration is t2. If so, it is determined that the system circulates more refrigerant, and the telescopic control unit 55 controls the telescopic pipe 54 to contract upward along the air outlet 53, and the telescopic pipe 54 performs a contraction action; if not, the telescopic pipe 54 does not act; Contraction control, specifically, the analysis control module 6 sends a contraction control signal to the telescopic control unit 55, and the telescopic control unit 55 drives the telescopic pipeline 54 to contract, which is manifested in the unit as the telescopic pipeline 54 moving upward along the air outlet 53. The control method can be gear control, step control or other control methods. After the contraction control, the fourth detection item is entered; When the telescopic control unit 55 controls the telescopic pipe 54 to extend downward, the analysis control module 6 enters the third detection item to determine whether Pd>a2 or Tdsh<b2 or the telescopic pipe 54 moves downward to the limit position. If so, the telescopic pipe 54 stops moving downward; if not, the telescopic pipe 54 continues to move downward; When the telescopic control unit 55 controls the telescopic pipe 54 to contract upward, the analysis control module 6 enters the fourth detection item; Under the fourth detection item, the analysis control module 6 determines whether Pd<a4 or Tdsh>b4 or the telescopic pipe 54 moves upward to the limit position. If so, the telescopic pipe 54 stops moving upward; if not, the telescopic pipe 54 continues to move upward.

[0071] Among them, a1, a2, a3, a4, b1, b2, b3, and b4 are all values ​​related to the unit operating parameters. If the indoor heat exchanger 44 is for air heat exchange, it is related to the outer loop temperature Tao and the inner loop temperature Tai. If the indoor heat exchanger 44 is for water heat exchange, it is related to the outer loop temperature Tao and the water temperature Tw.

[0072] The second embodiment of refrigerant regulation during heating is as follows: Fig. 9As shown, ΔTe is the change in temperature of the refrigerant flowing into the outdoor heat exchanger 3 during time t3, and ΔPs is the change in suction pressure of the compressor 1 during time t4.

[0073] When the air conditioner is heating, the analysis control module 6 collects the operating parameters of each component of the unit, performs system load judgment, and first enters the fifth detection item to judge whether △Te<c1 or △Ps<d1. If so, the telescopic control unit 55 controls the telescopic pipe 54 to extend downward; if not, the telescopic pipe 54 does not move; Extension control, specifically, the analysis control module 6 sends an extension control signal to the telescopic control unit 55, and the telescopic control unit 55 drives the telescopic pipe 54 to extend, which is manifested in the unit as the telescopic pipe 54 moving downward along the air outlet 53. The control method can be gear control, step control or other control methods. After the extension control, the sixth detection item is entered; When the telescopic control unit 55 controls the telescopic pipe 54 to move downward, the analysis control module 6 enters the sixth detection item to determine whether △Te>c2 or △Ps>d2 or the telescopic pipe 54 moves downward to the limit position. If so, the telescopic pipe 54 stops moving; if not, the telescopic pipe 54 continues to move downward.

[0074] Among them, △Te=Te1-Te2, Te1 is the refrigerant temperature at the current time, Te2 is the refrigerant temperature before t3 time, that is, △Te represents the change of the refrigerant temperature within t3 time; △Ps=Ps1-Ps2, Ps1 is the suction pressure at the current time, Ps2 is the suction pressure before t4, that is, △Ps represents the change in suction pressure within t4; c1, c2, d1, and d2 are all values ​​related to the unit operating parameters. If the indoor heat exchanger 44 is for air heat exchange, it is related to the outer loop temperature Tao and the inner loop temperature Tai. If the indoor heat exchanger 44 is for water heat exchange, it is related to the outer loop temperature Tao and the water temperature Tw.

[0075] In some embodiments, since the amount of refrigerant does not need to be adjusted during refrigeration, a control method during refrigeration can be added, such as Fig.10 As shown, when the unit starts refrigeration or switches to refrigeration mode, it is first determined whether the telescopic pipe 54 is in the contraction limit position. If so, the telescopic pipe 54 maintains this position and the control ends; if not, the telescopic pipe 54 contracts upward to the limit position.

[0076] In some embodiments, when the air conditioner is cooling, the telescopic control unit 55 controls the telescopic pipe 54 to contract upward to an extreme position.

[0077] In some embodiments, the indoor heat exchanger 4 is a coil fin type heat exchanger or a water heat exchanger.

[0078] In some embodiments, the telescopic pipe 54 is sleeved in the air outlet 53 and is sealed with the air outlet 53. It can perform reciprocating telescopic motion in the vertical direction of the air outlet 53 under the control of the telescopic control unit 55. The telescopic motion is driven by mechanical drive, hydraulic drive, electric drive or other forms of drive.

[0079] In some embodiments, the telescopic pipeline 54 is a sleeve structure, and the telescopic control of the sleeve structure is controlled by the telescopic control unit 55 to achieve telescopic control of the telescopic pipeline 54.

[0080] In some embodiments, a position sensor (not shown) for detecting the position of the telescopic pipe 54 is provided in the shell 51. The position sensor detects the position of the bottom port of the telescopic pipe 54 in the liquid reservoir 5. During heating, according to the amount of refrigerant required by the system, the telescopic control unit 55 controls the telescopic pipe 54 to extend or contract by a corresponding amount. The position sensor detects the movement of the telescopic pipe 54 in real time, and then the telescopic control unit 55 controls the telescopic pipe 54 to stop when the telescopic pipe 54 moves to the right position.

[0081] In some embodiments, an air conditioner is provided, wherein the heat exchange system of the air conditioner is composed of a compressor 1, a reversing valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 4, a throttling device, and a liquid reservoir 5, etc. The liquid reservoir 5 is arranged between the indoor heat exchanger 4 and the outdoor heat exchanger 3.

[0082] A telescopic pipe 54 is provided in the top air outlet 53 of the liquid reservoir 5, one end of the telescopic pipe 54 is connected to the inner cavity of the liquid reservoir 5, and the other end is connected to the outdoor heat exchanger 3. The telescopic pipe 54 moves up and down along the air outlet 53 to adjust the amount of refrigerant stored in the liquid reservoir 5 when the air conditioner is heating.

[0083] That is to say, by moving the telescopic pipe 54 up and down along the air outlet 53, the effective volume of the accumulator 5 is adjusted, thereby adjusting the amount of refrigerant stored in the accumulator 5 when the air conditioner is heating, that is, adjusting the amount of circulating refrigerant when the system is heating.

[0084] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0085] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air conditioner, comprising: A heat exchange system, which includes a compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger, and a throttling device; Characterized in that the heat exchange system also includes: A liquid storage device, which is arranged between the indoor heat exchanger and the outdoor heat exchanger, comprises: A shell, in which a receiving cavity for containing refrigerant is formed, an air inlet is arranged at the bottom of the shell, and an air outlet is arranged at the top, and the air inlet is connected to the indoor heat exchanger; A telescopic pipeline is arranged in the air outlet, one end of the telescopic pipeline is connected to the accommodating chamber, and the other end is connected to the outdoor heat exchanger. The telescopic pipeline moves up and down along the air outlet to adjust the length of the telescopic pipeline extending into the accommodating chamber to adjust the amount of refrigerant participating in the heating cycle.

2. The air conditioner according to claim 1, characterized in that: The liquid accumulator is disposed in a vertical position between the indoor heat exchanger and the outdoor heat exchanger.

3. The air conditioner according to claim 1, characterized in that: It also includes a telescopic control unit and an analysis control module; The analysis control module is used to collect the operating parameters of the air conditioner, determine the operating load of the heat exchange system, and determine the demand for refrigerant by the heat exchange system under different operating loads; The telescopic control unit controls the telescopic pipeline to move upward or downward along the air outlet according to the demand amount of refrigerant, so as to adjust the amount of refrigerant participating in the heating cycle.

4. The air conditioner according to claim 3, characterized in that: The exhaust superheat of the compressor is Tdsh and the exhaust pressure is Pd; When the air conditioner is heating, the analysis and control module first enters the first detection item to determine whether Pd<a1 and Tdsh>b1 and the duration is t1. If so, the telescopic control unit controls the telescopic pipeline to extend downward along the air outlet; if not, the analysis and control module enters the second detection item; Under the second detection item, the analysis control module determines whether Pd>a3 and Tdsh<b3 and the duration is t2. If so, the telescopic control unit controls the telescopic pipeline to contract upward along the air outlet; if not, the telescopic pipeline does not move; When the telescopic control unit controls the telescopic pipeline to extend downward, the analysis control module enters the third detection item to determine whether Pd>a2 or Tdsh<b2 or the telescopic pipeline moves downward to the limit position. If so, the telescopic pipeline stops moving downward; if not, the telescopic pipeline continues to move downward; When the telescopic control unit controls the telescopic pipeline to contract upward, the analysis control module enters the fourth detection item; Under the fourth detection item, the analysis and control module determines whether Pd<a4 or Tdsh>b4 or the telescopic pipeline moves upward to the limit position. If so, the telescopic pipeline stops moving upward; if not, the telescopic pipeline continues to move upward.

5. The air conditioner according to claim 3, characterized in that: When the air conditioner is heating, ΔTe is the change in temperature of the refrigerant flowing into the outdoor heat exchanger during time t3, and ΔPs is the change in suction pressure of the compressor during time t4; The analysis control module first enters the fifth detection item to determine whether △Te<c1 or △Ps<d1. If so, the telescopic control unit controls the telescopic pipeline to extend downward; if not, the telescopic pipeline does not move; When the telescopic control unit controls the telescopic pipeline to move downward, the analysis control module enters the sixth detection item to determine whether △Te>c2 or △Ps>d2 or the telescopic pipeline moves downward to the limit position. If so, the telescopic pipeline stops moving; if not, the telescopic pipeline continues to move downward.

6. The air conditioner according to claim 3, characterized in that: When the air conditioner is cooling, the telescopic control unit controls the telescopic pipeline to contract upward to a limit position.

7. The air conditioner according to claim 6, characterized in that: When the air conditioner is started or switched to cooling mode, it is first determined whether the telescopic pipe is in the contraction limit position. If so, the telescopic pipe maintains this position; if not, the telescopic pipe contracts upward to the limit position.

8. The air conditioner according to any one of claims 1 to 7, characterized in that: The indoor heat exchanger is a coil fin type heat exchanger or a water heat exchanger.

9. The air conditioner according to any one of claims 1 to 7, characterized in that: The telescopic pipeline is sealed and connected to the air outlet, and the telescopic pipeline is a sleeve structure.

10. An air conditioner, comprising: A heat exchange system, comprising a compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger, a throttling device, and a liquid reservoir, wherein the liquid reservoir is arranged between the indoor heat exchanger and the outdoor heat exchanger; It is characterized in that a telescopic pipe is provided in the top air outlet of the liquid reservoir, one end of the telescopic pipe is connected to the inner cavity of the liquid reservoir, and the other end is connected to the outdoor heat exchanger, and the telescopic pipe moves up and down along the air outlet to adjust the amount of refrigerant stored in the liquid reservoir when the air conditioner is heating.

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