Compressor, air conditioner and control method of air conditioner

Abstract

The application discloses a compressor, an air conditioner and a control method of the air conditioner. The compressor comprises a cylinder body, a liquid accumulator and a heat storage element. The cylinder body is provided with an air inlet and a first return air inlet. The first return air inlet is communicated with a gas-liquid separator through a first connecting pipe. The liquid accumulator is stacked with the cylinder body in the height direction. The liquid accumulator is provided with a discharge port. The discharge port is communicated with the air inlet through a second connecting pipe. The heat storage element is arranged between the cylinder body and the liquid accumulator. The heat storage element is adapted to exchange heat with the cylinder body and the liquid accumulator. The first connecting pipe penetrates the heat storage element and is adapted to exchange heat with the heat storage element. Thus, on the one hand, the compressor occupies a smaller space and has a more compact structure. On the other hand, the working temperature of the cylinder body is effectively reduced, and the working stability is improved. Moreover, after the jet injection and enthalpy increasing function is started, the heat exchange between the first connecting pipe and the heat storage element can further improve the return air enthalpy of the enthalpy increasing return air, so as to optimize the energy distribution in the cylinder body, and then enhance the working performance of the compressor.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a compressor, an air conditioner, and a control method for the air conditioner. Background Technology

[0002] In existing technologies, compressors are generally of a split structure, with the compressor cylinder and liquid receiver set separately and connected by a connecting pipe. This results in a large compressor size, which occupies a lot of space. Furthermore, the heat generated by the compressor cylinder during operation causes the cylinder temperature to rise, resulting in uneven energy distribution within the compressor and low compressor efficiency. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a compressor that is small in size, occupies little space, and is capable of dissipating and storing heat generated within the cylinder, optimizing the energy distribution of the compressor, and enhancing its working performance.

[0004] Another object of the present invention is to provide an air conditioner having the above-described compressor.

[0005] The present invention also aims to provide a control method for the above-mentioned air conditioner.

[0006] A compressor according to an embodiment of the present invention includes: a cylinder, a liquid receiver, and a heat storage element. The cylinder has an inlet and a first return port, the first return port being connected to a gas-liquid separator via a first connecting pipe; the liquid receiver is stacked on top of the cylinder in the height direction, the liquid receiver having a discharge port, the discharge port being connected to the inlet via a second connecting pipe; the heat storage element is disposed between the cylinder and the liquid receiver, the heat storage element being adapted to exchange heat with the cylinder and the liquid receiver, and the first connecting pipe passing through the heat storage element and adapted to exchange heat with the heat storage element.

[0007] According to an embodiment of the compressor of the present invention, the cylinder and the liquid receiver are stacked in the height direction, and a heat storage element is placed between the cylinder and the liquid receiver. The outlet of the liquid receiver is connected to the inlet of the cylinder through a second connecting pipe, and the first return port of the cylinder is connected to a gas-liquid separator through a first connecting pipe. Simultaneously, the heat storage element passes through the first connecting pipe, allowing the heat storage element to exchange heat with the cylinder, the liquid receiver, and the compressor itself. Therefore, on the one hand, by stacking the cylinder, the heat storage element, and the liquid receiver in the height direction, the volume of the compressor can be reduced, resulting in a smaller space occupied and a more compact structure. On the other hand, not only can the heat storage element exchange heat with the cylinder and the liquid receiver, effectively reducing the operating temperature of the cylinder and improving operational stability, but also, after activating the jet enthalpy enhancement function, the heat exchange between the first connecting pipe and the heat storage element can further increase the return enthalpy value of the enthalpy-enhanced return gas, thereby optimizing the energy distribution within the cylinder and enhancing the compressor's performance.

[0008] In some embodiments, the heat storage component includes a heat storage shell and a heat storage filling layer filled in the heat storage shell, and the first connecting pipe passes through the heat storage shell.

[0009] Furthermore, the first connecting pipe is wound inside the heat storage shell.

[0010] An air conditioner according to a second aspect of the present invention includes: a compressor, a four-way valve, an evaporator, a condenser, and a gas-liquid separator as described in the above embodiments. The compressor cylinder further has an exhaust port, and the liquid receiver further has a second return port; the four-way valve has an exhaust connection port, a return port, a condenser connection port, and an evaporator connection port, the exhaust connection port communicating with the exhaust port, and the return port communicating with the second return port; the condenser, the gas-liquid separator, and the evaporator are sequentially connected, and the condenser inlet of the condenser is connected with the condenser connection port, the evaporator outlet of the evaporator is connected with the evaporator connection port, and the gas-liquid separator further has an enthalpy-increasing outlet, which is connected to the first return port via a first connecting pipe.

[0011] According to a second aspect embodiment of the air conditioner, the refrigerant compressed by the compressor is discharged through the exhaust port on the cylinder block, flows sequentially through the evaporator, gas-liquid separator, and condenser via a four-way valve, and then flows through the condenser outlet of the condenser to the condenser connection port, thereby returning to the four-way valve. It then flows through the return gas connection port of the four-way valve to the second return gas port, and finally flows back to the compressor's receiver, forming a complete circuit to achieve the air conditioner's cooling or heating function. Furthermore, the gas-liquid separator also has an enthalpy-increasing outlet. When the refrigerant flows through the gas-liquid separator, it can flow through the enthalpy-increasing outlet into the first return gas port via the first connecting pipe, forming another circuit. Since the first connecting pipe passes through a heat storage element, when the refrigerant flows through the heat storage element through the first connecting pipe, the heat storage element can exchange heat with the refrigerant in the first connecting pipe. While cooling the compressor, it increases the enthalpy value of the refrigerant, making the refrigerant's energy higher, thereby improving the air conditioner's operating performance.

[0012] In some embodiments, the first connecting pipe is provided with an opening regulating valve to adjust the flow rate of the enthalpy-increasing outlet.

[0013] Furthermore, a first throttling valve is provided between the condenser and the gas-liquid separator, and a second throttling valve is provided between the gas-liquid separator and the evaporator.

[0014] A control method for an air conditioner according to a third aspect of the present invention includes: identifying the operating mode of the air conditioner; if it is in cooling mode, acquiring the outdoor ambient temperature; if the outdoor ambient temperature is less than a first temperature threshold, closing the opening regulating valve; if the outdoor ambient temperature is greater than or equal to the first temperature threshold and less than a second temperature threshold, controlling the opening of the opening regulating valve according to a first-level control command; if the outdoor ambient temperature is greater than the second temperature threshold, controlling the opening of the opening regulating valve according to a second-level control command, wherein the first temperature threshold is less than the second temperature threshold, and the opening of the opening regulating valve is adjusted according to the outdoor ambient temperature under both the first-level control command and the second-level control command, and the change in opening with temperature under the first-level control command is less than the change in opening with temperature under the second-level control command.

[0015] According to the control method of an air conditioner according to a third aspect of the present invention, when the air conditioner is in cooling mode, the opening degree of the opening degree regulating valve is controlled according to the outdoor ambient temperature to control the flow rate of refrigerant in the first connecting pipe. By setting a first temperature threshold and a second temperature threshold, the opening degree regulating valve can control the flow rate of refrigerant according to a first-level control command and a second-level control command, thereby realizing the continuous variable flow rate of refrigerant at the enthalpy-increasing outlet to adapt to the needs under different operating conditions, thereby making the air conditioner perform better.

[0016] Furthermore, the opening adjustment under the first-level control command satisfies: Q = (k1*T) / (k2*f), and the opening adjustment under the second-level control command satisfies: Q = (k3*T) / (k4*f), where Q is the opening of the opening regulating valve, f is the operating frequency of the compressor, T is the outdoor ambient temperature, and k1, k2, k3, and k4 are adjustment coefficients, where k3 > k1 and k2 > k4.

[0017] Furthermore, k1, k2, k3, and k4 satisfy 0 <k1 / k2<1,0<k1 / k2<k3 / k4<1。

[0018] The control method for an air conditioner according to the fourth embodiment of the present invention further includes: identifying the operating mode of the air conditioner; if it is in heating mode, acquiring the outdoor ambient temperature; if the outdoor ambient temperature is greater than or equal to a third temperature threshold, closing the opening regulating valve; if the outdoor ambient temperature is less than the third temperature threshold but greater than a fourth temperature threshold, controlling the opening of the opening regulating valve according to a three-level control command; if the outdoor ambient temperature is less than or equal to the fourth temperature threshold, controlling the opening of the opening regulating valve according to a four-level control command, wherein the third temperature threshold is greater than the fourth temperature threshold, and the opening of the opening regulating valve is adjusted according to the ambient temperature under both the three-level and four-level control commands, and the change in opening with temperature under the three-level control command is less than the change in opening with temperature under the four-level control command.

[0019] Furthermore, the opening adjustment under the third-level control command satisfies: Q = (k5*f) / (k6*T), and the opening adjustment under the fourth-level control command satisfies: Q = (k7*f) / (k8*T), where Q is the opening of the opening regulating valve, f is the operating frequency of the compressor, T is the outdoor ambient temperature, and k5, k6, k7, and k8 are adjustment coefficients, where k7 > k5 and k6 > k8.

[0020] Furthermore, k5, k6, k7, and k8 satisfy 1 < k5 / k6 < 2 and 1 < k5 / k6 < k7 / k8 < 2.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of a compressor according to an embodiment of the present invention.

[0024] Figure 2 This is an internal schematic diagram of an air conditioner according to the second embodiment of the present invention.

[0025] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0026] Figure 4 This is a circuit diagram of the air conditioner in an embodiment of the present invention when the opening adjustment valve is closed.

[0027] Figure 5 This is a circuit diagram of the air conditioner in an embodiment of the present invention when the opening adjustment valve is opened.

[0028] Figure 6 This is a flowchart of the control method for an air conditioner according to the third embodiment of the present invention.

[0029] Figure 7 This is a flowchart of the control method for an air conditioner according to the fourth embodiment of the present invention.

[0030] Figure label:

[0031] Air conditioner 1

[0032] Compressor 100

[0033] Cylinder block 110, intake port 111, first exhaust port 112, exhaust port 113

[0034] Liquid reservoir 120, outlet 121, second vent 122

[0035] Heat storage component 130

[0036] First connecting pipe 140

[0037] Second connecting pipe 150

[0038] Four-way valve 200

[0039] Exhaust connection port 210

[0040] 220 return air connection port

[0041] Condenser connection port 230

[0042] Evaporator connection port 240

[0043] Condenser 300

[0044] Evaporator 400

[0045] Gas-liquid separator 500

[0046] Increased enthalpy exports 510

[0047] 600 opening adjustment valve

[0048] First throttle valve 700,

[0049] Second throttle valve 800. Detailed Implementation

[0050] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0051] The following is for reference. Figure 1 A compressor 100, an air conditioner 1, and a control method thereof are described according to embodiments of the present invention.

[0052] The compressor 100 according to an embodiment of the present invention includes: a cylinder 110, a liquid receiver 120, and a heat storage element 130.

[0053] The cylinder 110 has an air inlet 111 and a first air return port 112. The first air return port 112 is connected to the gas-liquid separator 500 through a first connecting pipe 140. The liquid reservoir 120 is stacked on top of the cylinder 110 in the height direction. The liquid reservoir 120 has an outlet 121. The outlet 121 is connected to the air inlet 111 through a second connecting pipe 150. The heat storage element 130 is disposed between the cylinder 110 and the liquid reservoir 120. The heat storage element 130 is adapted to exchange heat with the cylinder 110 and the liquid reservoir 120. The first connecting pipe 140 passes through the heat storage element 130 and is adapted to exchange heat with the heat storage element 130.

[0054] Specifically, the cylinder 110 and the liquid reservoir 120 are stacked in the height direction, the heat storage element 130 is placed between the cylinder 110 and the liquid reservoir 120, the outlet 121 of the liquid reservoir 120 is connected to the air inlet 111 of the cylinder 110 through the second connecting pipe 150, and the first return air port 112 of the cylinder 110 is connected to the gas-liquid separator 500 through the first connecting pipe 140.

[0055] When the compressor 100 is working, the refrigerant in the receiver 120 can enter the inlet 111 through the outlet 121 via the second connecting pipe 150. The cylinder 110 contains moving parts such as a rotor, turbine, and piston that convert the low-pressure refrigerant entering the receiver 120 into high-pressure refrigerant. During operation, these moving parts generate a large amount of heat. If the cylinder 110 cannot dissipate heat in time, it will affect the lifespan of the cylinder 110 and the working efficiency of the compressor 100. A heat storage element 130 is located between the cylinder 110 and the receiver 120, enabling heat exchange with the cylinder 110, dissipating the heat generated by the cylinder 110, and storing it within the heat storage element 130.

[0056] Furthermore, the first connecting pipe 140 is connected to the gas-liquid separator 500 and passes through the heat storage element 130, enabling heat exchange with the heat storage element 130. During the operation of the compressor 100, the cylinder 110 continuously generates heat. After exchanging heat with the cylinder 110, the temperature of the heat storage element 130 increases. When gaseous refrigerant flows from the gas-liquid separator 500 through the first connecting pipe 140 and injects into the cylinder 110 via the heat storage element 130 (i.e., during vapor injection enthalpy enhancement), the first connecting pipe 140 exchanges heat with the heat storage element 130, which can increase the return enthalpy value of vapor injection enthalpy enhancement.

[0057] It should be noted that the compressor 100 has a separate cylinder 110 and liquid receiver 120 structure, connected by pipelines, resulting in a large volume and space occupation. However, in household appliances requiring compressor 100 installation, such as air conditioner 1, users have increasingly higher requirements for miniaturization, and the separate layout of compressor 100 is not conducive to the miniaturization of air conditioner 1. In this application, by stacking cylinder 110 and liquid receiver 120 in the height direction, the volume of compressor 100 can be effectively reduced, and the space occupied by compressor 100 within the air conditioner can be minimized.

[0058] According to an embodiment of the present invention, the compressor 100 can reduce its volume by stacking the cylinder 110, the heat storage element 130, and the liquid receiver 120 in the height direction, making the compressor 100 occupy less space and have a more compact structure. On the other hand, not only can the heat storage element 130 exchange heat with the cylinder 110 and the liquid receiver 120, effectively reducing the operating temperature of the cylinder 110 and improving its operating stability, but also, after the jet enthalpy enhancement function is activated, the heat exchange between the first connecting pipe 140 and the heat storage element 130 can further increase the return enthalpy value of the enthalpy enhancement return gas, thereby optimizing the energy distribution within the cylinder 110 and enhancing the working performance of the compressor 100.

[0059] In some embodiments, the heat storage component 130 includes a heat storage shell and a heat storage filling layer filled in the heat storage shell, and the first connecting pipe 140 passes through the heat storage shell.

[0060] Specifically, the heat storage element 130 is disposed between the cylinder 110 and the liquid receiver 120. The heat storage shell of the heat storage element 130 can provide support for the cylinder 110, improve the structural stability of the compressor 100, and thus improve the stability of the compressor 100 during operation.

[0061] The heat storage filling layer inside the heat storage shell can absorb the heat generated by the operation of the cylinder 110 and store the heat. When the refrigerant in the first connecting pipe 140 flows through the heat storage element 130, the heat storage filling layer can exchange heat with the refrigerant. Since the temperature of the refrigerant flowing out from the gas-liquid separator 500 is low, when the refrigerant flows through the heat storage filling layer, it can carry away the heat in the heat storage element 130 to achieve return gas enthalpy increase, while cooling the heat storage filling layer so that the heat storage element 130 maintains a good heat storage effect.

[0062] It should be noted that there are no specific restrictions on the heat storage materials within the heat storage filling layer. These materials can include: sensible heat storage materials, such as water, rock, and alumina; phase change heat storage materials, such as mixed salts, organic alcohols, metals, or alloys; and adsorption heat storage materials, such as porous materials. Different heat storage materials have different heat storage performance, and the appropriate material can be selected based on actual needs.

[0063] Therefore, through the heat exchange between the refrigerant in the first connecting pipe 140 passing through the heat storage component 130 and the heat storage filling layer, the heat storage component 130 can maintain a good heat dissipation effect on the cylinder 110, thereby improving the stability of the compressor 100 operation.

[0064] Furthermore, the first connecting pipe 140 is wound inside the heat storage shell. Thus, by winding the first connecting pipe 140 inside the heat storage shell, the length of the first connecting pipe 140 within the heat storage element 130 can be increased, thereby increasing the contact area between the first connecting pipe 140 and the heat storage filling layer, and improving the heat exchange efficiency.

[0065] It should be noted that there are no specific restrictions on the winding method of the first connecting pipe 140 in the heat storage shell. For example, the first connecting pipe 140 can be wound in a serpentine manner or in a circular manner in the heat storage shell, which can be selected according to actual needs.

[0066] Optionally, the diameter of the first connecting pipe 140 inside the heat storage shell is larger than the diameter outside the heat storage shell. After the first connecting pipe 140 enters the heat storage shell, the pipe diameter increases, which can increase the contact area between the pipe wall of the first connecting pipe 140 and the heat storage filling layer, thereby further increasing the heat exchange efficiency between the refrigerant and the heat storage element 130.

[0067] The following is for reference. Figures 2-5 An air conditioner 1 according to an embodiment of the second aspect of the present invention is described.

[0068] like Figures 2-3 As shown, an air conditioner 1 according to a second aspect embodiment of the present invention includes: a compressor 100, a four-way valve 200, an evaporator 400, a condenser 300, and a gas-liquid separator 500 as described above.

[0069] The compressor 100 has a cylinder 110 with an exhaust port 113, and a liquid receiver 120 has a second return port 122. The four-way valve 200 has an exhaust connection port 210, a return port 220, a condenser connection port 230, and an evaporator connection port 240. The exhaust connection port 210 is connected to the exhaust port 113, and the return port 220 is connected to the second return port 122. The condenser 300, gas-liquid separator 500, and evaporator 400 are connected in sequence. The condenser inlet of the condenser 300 is connected to the condenser connection port 230, and the evaporator outlet of the evaporator 400 is connected to the evaporator connection port 240. The gas-liquid separator 500 also has an enthalpy-increasing outlet 510, which is connected to the first return port 112 via a first connecting pipe 140.

[0070] According to the second aspect of the present invention, in the air conditioner 1, the refrigerant compressed by the compressor 100 is discharged through the exhaust port 113 on the cylinder 110, flows through the four-way valve 200, sequentially through the evaporator 400, the gas-liquid separator 500 and the condenser 300, and then flows through the condenser outlet of the condenser 300 to the condenser connection port 230, thereby flowing back to the four-way valve 200, flowing through the return gas connection port 220 of the four-way valve 200 to the second return gas port 122, and finally flowing back to the liquid receiver 120 of the compressor 100, forming a complete circuit to realize the cooling or heating function of the air conditioner 1.

[0071] Furthermore, the gas-liquid separator 500 also has an enthalpy-increasing outlet 510. When the refrigerant flows through the gas-liquid separator 500, it can flow into the first return gas port 112 through the first connecting pipe 140 via the enthalpy-increasing outlet 510 to form a jet enthalpy-increasing circuit and realize the jet enthalpy-increasing of the compressor 100.

[0072] Since the heat storage element 130 passes through the first connecting pipe 140, when the refrigerant flows through the heat storage element 130 through the first connecting pipe 140 and is injected into the cylinder 110, the heat storage element 130 can exchange heat with the refrigerant in the first connecting pipe 140. While cooling the compressor 100, it increases the return enthalpy value of the enthalpy-increasing return gas, making the energy in the refrigerant higher, thereby improving the working performance of the air conditioner 1.

[0073] In some embodiments, an opening regulating valve 600 is provided on the first connecting pipe 140 to adjust the flow rate of the enthalpy-increasing outlet 510.

[0074] Specifically, by installing an opening regulating valve 600 on the first connecting pipe 140, a portion of the refrigerant, after reaching the gas-liquid separator 500, can return through the enthalpy-increasing outlet 510 via the first connecting pipe 140, forming a jet enthalpy-increasing circuit. When the refrigerant returns from the first connecting pipe 140 to the heat storage element 130, it can exchange heat with the heat storage filling layer within the heat storage element 130, further increasing the enthalpy value of the enthalpy-increasing return gas. The refrigerant with increased energy returns to the cylinder 110 and continues to circulate through the cylinder 110 exhaust port 113 into the four-way valve 200, thus achieving the enthalpy-increasing process and improving the operating performance of the air conditioner 1. Furthermore, by installing the opening regulating valve 600 on the first connecting pipe 140, the flow rate of the enthalpy-increasing return gas can be controlled, allowing for different enthalpy-increasing return gas flow rates to be set according to different usage requirements, thereby enhancing the effect of the enthalpy-increasing return gas.

[0075] For ease of description, the following describes the operating state of the air conditioner 1 of the present invention in detail, taking the air conditioner 1 in heating mode as an example.

[0076] Figure 4 The diagram illustrates the heating operation state of the air conditioner 1 according to an embodiment of the present invention when the opening adjustment valve 600 is in the closed state.

[0077] like Figure 4 As shown, the operating path of the refrigerant is as follows: receiver 120 → outlet 121 of receiver 120 → second connecting pipe 150 → cylinder 110 → outlet 113 of compressor 100 → outlet 210 of four-way valve 200 → condenser connection 230 of four-way valve 200 → condenser 300 → gas-liquid separator 500 → evaporator 400 → evaporator connection 240 of four-way valve 200 → return gas connection 220 of four-way valve 200 → second return gas port 122 of receiver 120.

[0078] During operation, the opening regulating valve 600 is in the closed state, the enthalpy-increasing outlet 510 of the gas-liquid separator 500 is not connected to the compressor 100, and the air conditioner 1 is in the normal heating or cooling mode.

[0079] Figure 5 The diagram illustrates the heating operation state of the air conditioner 1 according to an embodiment of the present invention when the opening regulating valve 600 is in the open state.

[0080] like Figure 5As shown, the refrigerant's operating path in the main circuit is as follows: receiver 120 → outlet 121 of receiver 120 → second connecting pipe 150 → cylinder 110 → outlet 113 of compressor 100 → outlet 210 of four-way valve 200 → condenser connection 230 of four-way valve 200 → condenser 300 → gas-liquid separator 500 → evaporator 400 → evaporator connection 240 of four-way valve 200 → return gas connection 220 of four-way valve 200 → second return gas port 122 of receiver 120.

[0081] The refrigerant's operating path in the vapor injection enthalpy-increasing circuit is as follows: receiver 120 → receiver 120 outlet 121 → second connecting pipe 150 → cylinder 110 → compressor 100 outlet 113 → four-way valve 200 outlet 210 → four-way valve 200 condenser outlet 230 → condenser 300 → gas-liquid separator 500 → enthalpy-increasing outlet 510 → opening regulating valve 600 → first return gas port 112.

[0082] During operation, the opening regulating valve 600 is in the open state, and the enthalpy-increasing outlet 510 of the gas-liquid separator 500 is connected to the compressor 100. Part of the refrigerant flows back to the compressor 100 through the first connecting pipe 140 for vapor injection enthalpy increase. While improving the refrigerant circulation efficiency, it can also improve the heating capacity of the air conditioner 1. At this time, the air conditioner 1 is in vapor injection enthalpy increase heating or cooling mode.

[0083] Therefore, after passing through the heat storage element 130, the refrigerant can carry away the heat within the heat storage element 130, keeping its temperature at a low level. This ensures that the heat storage element 130 provides good heat dissipation to the cylinder 110 during compressor operation, improving the stability of compressor operation. Furthermore, by installing an opening regulating valve 600 within the air conditioner 1, opening the valve allows the air conditioner 1 to switch from normal operation to vapor injection enthalpy enhancement operation, significantly improving its performance under extreme conditions (cold or hot environments).

[0084] Furthermore, a first throttling valve 700 is provided between the condenser 300 and the gas-liquid separator 500, and a second throttling valve 800 is provided between the gas-liquid separator 500 and the evaporator 400. Thus, the flow rate of refrigerant into the evaporator 400 and the condenser 300 can be controlled respectively through the first throttling valve 700 and the second throttling valve 800, allowing users to control the cooling or heating effect of the air conditioner 1 according to their actual needs, thus enhancing personalized settings.

[0085] like Figure 6 As shown, a control method for an air conditioner according to a third aspect embodiment of the present invention includes:

[0086] Identify the operating mode of air conditioner 1;

[0087] If in cooling mode, obtain the outdoor ambient temperature;

[0088] If the outdoor ambient temperature is lower than the first temperature threshold, then close the opening adjustment valve 600.

[0089] If the outdoor ambient temperature is greater than or equal to the first temperature threshold and less than the second temperature threshold, the opening of the opening regulating valve 600 is controlled according to the first-level control command.

[0090] If the outdoor ambient temperature is greater than the second temperature threshold, the opening of the opening regulating valve 600 will be controlled according to the secondary control command.

[0091] Among them, the first temperature threshold is less than the second temperature threshold. Under the first-level control command and the second-level control command, the opening degree of the opening regulating valve 600 is adjusted according to the outdoor ambient temperature. Moreover, the opening degree under the first-level control command changes with temperature less than the opening degree under the second-level control command changes with temperature.

[0092] Specifically, when the air conditioner 1 is in cooling mode, if the obtained outdoor temperature is less than the first temperature threshold, the temperature of the first temperature threshold indicates that the air conditioner 1 has a good cooling effect at this ambient temperature, then the opening adjustment valve 600 is closed, and the air conditioner 1 is in normal cooling mode.

[0093] When the obtained outdoor temperature is greater than or equal to the first temperature threshold and less than the second temperature threshold, it indicates that the cooling capacity of the air conditioner 1 will decrease to a certain extent (but the decrease is small). The opening adjustment valve 600 can be opened and the opening can be controlled according to the first-level control command. At this time, the opening is small, and some refrigerant can enter the first connecting pipe 140 from the enthalpy-increasing outlet 510 of the gas-liquid separator 500 (the jet enthalpy-increasing function is turned on). Through the enthalpy-increasing function of the compressor 100, the cooling capacity of the air conditioner 1 is increased.

[0094] When the outdoor temperature is greater than the second temperature threshold, it indicates that the cooling capacity of the air conditioner 1 will decrease to a greater extent. The opening of the opening regulating valve 600 is controlled according to the secondary control command, so that the opening of the opening regulating valve 600 is increased. At this time, more refrigerant enters the first connecting pipe 140 through the enthalpy-increasing outlet 510. After the compressor 100 performs the enthalpy-increasing function, the enthalpy value of the refrigerant is also higher, further increasing the cooling capacity of the air conditioner 1.

[0095] In the control method for an air conditioner according to the embodiment of the third aspect of the present invention, when the air conditioner is in a cooling mode, the opening degree of the opening adjustment valve 600 is controlled according to the outdoor ambient temperature, so as to control the flow rate of refrigerant in the first connecting pipe 140. By setting a first temperature threshold and a second temperature threshold, the opening adjustment valve 600 can control the flow rate of refrigerant according to a primary control instruction and a secondary control instruction, thereby realizing continuous variation of the flow rate of refrigerant at the enthalpy-increasing outlet 510 to meet the requirements under different working conditions, so that the working performance of the air conditioner 1 is stronger.

[0096] Further, the opening adjustment under the primary control instruction satisfies: Q=(k1*T) / (k2*f), and the opening adjustment under the secondary control instruction satisfies: Q=(k3*T) / (k4*f), where Q is the opening degree of the opening adjustment valve 600, f is the operating frequency of the compressor 100, T is the outdoor ambient temperature, k1, k2, k3, and k4 are adjustment coefficients, and k3 > k1, k2 > k4. Therefore, the opening degree of the opening adjustment valve 600 is proportional to the outdoor ambient temperature and inversely proportional to the operating frequency of the compressor 100. That is to say, the higher the outdoor ambient temperature is, the greater the influence on the cooling effect of the air conditioner 1 is. At this time, as the opening degree of the opening adjustment valve 600 increases with the increase of temperature, the enthalpy-increasing function of the refrigerant can be enhanced, so that the influence of the ambient temperature on the air conditioner 1 is reduced, ensuring that the air conditioner 1 has a good cooling effect.

[0097] Wherein, the adjustment coefficients are obtained through laboratory experiments, the values of the adjustment coefficients are related to the compression capacity of the compressor 100, the outdoor ambient temperature, the power of the air conditioner 1, etc. The plurality of adjustment coefficients for compressors 100 of different specifications and sizes are different, but as long as the plurality of opening coefficients corresponding to the compressor 100 satisfy the above magnitude relationship as a whole, the gradient adjustment of the opening degree for vapor injection enthalpy-increasing can be realized, and no specific limitation is imposed herein.

[0098] Still further, k1, k2, k3, k4 satisfy 0<k1 / k2<1, 0<k1 / k2<k3 / k4<1. Therefore, it can be ensured that the change value of the opening degree of the opening adjustment valve 600 with temperature under the primary control instruction is smaller than that under the secondary control instruction, so as to realize continuous variation of the refrigerant enthalpy-increasing function, thereby ensuring that the air conditioner 1 has a good cooling effect.

[0099] As Figure 7 shown, the control method for an air conditioner according to the fourth embodiment of the present invention further comprises:

[0100] identifying the working mode of the air conditioner 1;

[0101] if the air conditioner is in a heating mode, acquiring the outdoor ambient temperature;

[0102] if the outdoor ambient temperature is greater than or equal to a third temperature threshold, closing the opening adjustment valve 600;

[0103] If the outdoor ambient temperature is less than the third temperature threshold and greater than the fourth temperature threshold, the opening of the opening regulating valve 600 will be controlled according to the three-level control command.

[0104] If the outdoor ambient temperature is less than or equal to the fourth temperature threshold, the opening of the opening regulating valve 600 will be controlled according to the fourth-level control command.

[0105] Among them, the third temperature threshold is greater than the fourth temperature threshold. Under the third-level control command and the fourth-level control command, the opening of the opening regulating valve 600 is adjusted according to the ambient temperature. Moreover, the opening change with temperature under the third-level control command is less than the opening change with temperature under the fourth-level control command.

[0106] Specifically, when the air conditioner 1 is in heating mode, if the obtained outdoor temperature is greater than or equal to the third temperature threshold, the temperature of the third temperature threshold indicates that the air conditioner 1 has a good heating effect at this ambient temperature, then the opening adjustment valve 600 is closed, and the air conditioner 1 is in normal heating mode.

[0107] When the obtained outdoor temperature is less than the third temperature threshold but greater than the fourth temperature threshold, it indicates that the heating capacity of the air conditioner 1 will decrease to a certain extent (but the decrease is small). The opening adjustment valve 600 can be opened and the opening can be controlled according to the three-level control command. At this time, the opening is small, and some refrigerant can enter the first connecting pipe 140 from the enthalpy-increasing outlet 510 of the gas-liquid separator 500 (the jet enthalpy-increasing function is turned on). Through the enthalpy-increasing function of the compressor 100, the heating capacity of the air conditioner 1 is increased.

[0108] When the obtained outdoor temperature is less than or equal to the fourth temperature threshold, it indicates that the heating capacity of the air conditioner 1 will decrease to a greater extent. The opening degree regulating valve 600 is controlled according to the fourth-level control command, so that the opening degree of the opening degree regulating valve 600 is increased. At this time, more refrigerant enters the first connecting pipe 140 through the enthalpy-increasing outlet 510. After the compressor 100 performs the enthalpy-increasing function, the enthalpy value of the refrigerant is also higher, further increasing the heating capacity of the air conditioner 1.

[0109] According to the control method of the air conditioner of the third aspect of the present invention, when the air conditioner is in heating mode, the opening degree of the opening degree regulating valve 600 is controlled according to the outdoor ambient temperature to control the flow rate of refrigerant in the first connecting pipe 140. By setting a third temperature threshold and a fourth temperature threshold, the opening degree regulating valve 600 can control the flow rate of refrigerant according to the third-level control command and the fourth-level control command, thereby realizing the continuous variable flow rate of refrigerant at the enthalpy-increasing outlet 510 to adapt to the needs under different operating conditions, thereby making the working performance of the air conditioner 1 stronger.

[0110] Furthermore, the opening adjustment under the third-level control command satisfies: Q = (k5*f) / (k6*T), and the opening adjustment under the fourth-level control command satisfies: Q = (k7*f) / (k8*T), where Q is the opening degree of the opening regulating valve 600, f is the operating frequency of the compressor 100, T is the outdoor ambient temperature, and k5, k6, k7, and k8 are adjustment coefficients, where k7 > k5 and k6 > k8. Therefore, the opening degree of the opening regulating valve 600 is inversely proportional to the outdoor ambient temperature and directly proportional to the operating frequency of the compressor 100. In other words, the lower the outdoor ambient temperature, the greater the impact on the heating effect of the air conditioner 1. At this time, the opening degree of the opening regulating valve 600 increases as the temperature decreases, which can increase the enthalpy-building function of the refrigerant, reduce the influence of the ambient temperature on the air conditioner 1, and ensure that the air conditioner 1 has a good cooling effect.

[0111] Furthermore, k5, k6, k7, and k8 satisfy 1 < k5 / k6 < 2 and 1 < k5 / k6 < k7 / k8 < 2. Therefore, it can be ensured that the opening degree of the regulating valve 600 changes with temperature under the third-level control command less than the opening degree changes with temperature under the fourth-level control command, thus achieving continuous variable refrigerant enthalpy enhancement and ensuring that the air conditioner 1 has good heating performance.

[0112] It should be noted that the vapor injection enthalpy enhancement and continuous variable control achieved by the opening and closing adjustment valve 600 in this application are based on the operating mode of the air conditioner 1. When the air conditioner 1 is in cooling or heating mode, corresponding control is implemented; when the air conditioner 1 is in other modes, it is not activated. Therefore, the control method of the air conditioner 1 in this application prioritizes identifying the operating mode of the air conditioner 1. In the description of this invention, it should be understood that the terms "height," "level," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They 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 of the invention. "First feature" and "second feature" can include one or more of the features. "A plurality of" means two or more. "Above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features not being in direct contact but through another feature between them. The phrase "above," "on top of," and "over" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0113] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0114] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method for an air conditioner, the air conditioner comprising a compressor, an evaporator, a condenser, and a gas-liquid separator, wherein the compressor has an inlet and a first return port, the condenser, the gas-liquid separator, and the evaporator are sequentially connected, and the condenser inlet of the condenser is connected to the condenser connection port, the evaporator outlet of the evaporator is connected to the evaporator connection port, the gas-liquid separator further having an enthalpy-increasing outlet, the first return port being connected to the enthalpy-increasing outlet via a first connecting pipe, and an opening adjustment valve being provided on the first connecting pipe, characterized in that... include: Identify the operating mode of the air conditioner; If in cooling mode, obtain the outdoor ambient temperature; If the outdoor ambient temperature is lower than the first temperature threshold, the opening adjustment valve will be closed. If the outdoor ambient temperature is greater than or equal to the first temperature threshold and less than the second temperature threshold, the opening of the regulating valve is controlled according to the first-level control command. If the outdoor ambient temperature is greater than the second temperature threshold, the opening of the regulating valve will be controlled according to the secondary control command. Wherein, the first temperature threshold is less than the second temperature threshold, and under both the primary control command and the secondary control command, the opening degree of the regulating valve is adjusted according to the outdoor ambient temperature, and the change in opening degree with temperature under the primary control command is less than the change in opening degree with temperature under the secondary control command. The regulating valve is used to adjust the flow rate at the enthalpy-increasing outlet, and the opening degree adjustment under the primary control command satisfies: Q = The opening adjustment under the secondary control command satisfies: Q= Where Q is the opening degree of the regulating valve, f is the operating frequency of the compressor, T is the outdoor ambient temperature, and k1, k2, k3, and k4 are adjustment coefficients, where k3 > k1, k2 > k4, and k1, k2, k3, and k4 satisfy 0. <k1 / k2<1,0<k1 / k2<k3 / k4<1。 2. The control method for an air conditioner according to claim 1, characterized in that, Also includes: Identify the operating mode of the air conditioner; If in heating mode, the outdoor ambient temperature is obtained; If the outdoor ambient temperature is greater than or equal to the third temperature threshold, the opening adjustment valve is closed. If the outdoor ambient temperature is less than the third temperature threshold and greater than the fourth temperature threshold, the opening of the regulating valve will be controlled according to the third-level control command. If the outdoor ambient temperature is less than or equal to the fourth temperature threshold, the opening of the regulating valve is controlled according to the fourth-level control command. The third temperature threshold is greater than the fourth temperature threshold. Under both the third-level and fourth-level control commands, the opening of the regulating valve is adjusted according to the ambient temperature. Furthermore, the change in opening with temperature under the third-level control command is less than the change in opening with temperature under the fourth-level control command.

3. The control method for an air conditioner according to claim 2, characterized in that, The opening adjustment under the three-level control command satisfies: Q= The opening adjustment under the four-level control command satisfies: Q= Where Q is the opening degree of the regulating valve, f is the operating frequency of the compressor, T is the outdoor ambient temperature, and k5, k6, k7, and k8 are adjustment coefficients, where k7 > k5 and k6 > k8.

4. The control method for an air conditioner according to claim 3, characterized in that, k5, k6, k7, and k8 satisfy 1 < k5 / k6 < 2 and 1 < k5 / k6 < k7 / k8 < 2.

5. An air conditioner, applicable to the control method of the air conditioner according to any one of claims 1-4, characterized in that, include: A compressor, comprising: a cylinder and a liquid receiver, the cylinder having an air inlet and a first air return port, the first air return port being connected to a gas-liquid separator via a first connecting pipe, the liquid receiver being stacked on top of the cylinder in the height direction, the liquid receiver having an outlet, the outlet being connected to the air inlet via a second connecting pipe, the cylinder also having an exhaust port, and the liquid receiver also having a second air return port; A four-way valve, the four-way valve having an exhaust connection port, a return gas connection port, a condenser connection port and an evaporator connection port, the exhaust connection port being connected to the exhaust port, and the return gas connection port being connected to the second return gas port; The system comprises an evaporator, a condenser, and a gas-liquid separator, wherein the condenser, the gas-liquid separator, and the evaporator are connected in sequence, and the condenser inlet of the condenser is connected to the condenser connection port, and the evaporator outlet of the evaporator is connected to the evaporator connection port. The gas-liquid separator also has an enthalpy-increasing outlet, which is connected to the first return gas port through the first connecting pipe. The first connecting pipe is equipped with an opening regulating valve to adjust the flow rate of the enthalpy-increasing outlet.

6. The air conditioner according to claim 5, characterized in that, A first throttling valve is provided between the condenser and the gas-liquid separator, and a second throttling valve is provided between the gas-liquid separator and the evaporator.

7. The air conditioner according to claim 5, characterized in that, The compressor further includes a heat storage element disposed between the cylinder and the liquid reservoir, the heat storage element being adapted to exchange heat with the cylinder and the liquid reservoir, and the first connecting pipe passing through the heat storage element and adapted to exchange heat with the heat storage element.

8. The air conditioner according to claim 7, characterized in that, The heat storage component includes a heat storage shell and a heat storage filling layer filled in the heat storage shell, and the first connecting pipe passes through the heat storage shell.

9. The air conditioner according to claim 8, characterized in that, The first connecting pipe is wound inside the heat storage shell.

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