Heat pump air conditioning system and heating start control method and device

Abstract

The invention discloses a heat pump air-conditioning system and a heating start control method and device, and the method comprises the steps: responding to a heating start-up signal, controlling the heat pump air-conditioning system to carry out a pressure equalizing stage, obtaining a heating demand, and controlling the opening and closing of an air-conditioning solenoid valve and a battery solenoid valve based on the heating demand; when a compressor of the heat pump air-conditioning system enters a starting stage, the heat pump air-conditioning system is controlled to operate on the basis of the states of an air conditioner electromagnetic valve and a battery electromagnetic valve in the pressure equalizing stage, the heating requirement continues to be obtained, and opening and closing of an air conditioner four-way valve and a battery four-way valve are controlled on the basis of the heating requirement; and when the compressor of the heat pump air-conditioning system enters the frequency raising stage, the heat pump air-conditioning system is controlled to operate based on the states of the air-conditioning solenoid valve, the battery solenoid valve, the air-conditioning four-way valve and the battery four-way valve in the starting stage. According to the method, the operation state of the heat pump air conditioning system is reasonably regulated and controlled in the pressure equalizing stage, the compression starting stage and the compressor frequency increasing stage, and accurate and efficient control over heating starting of the air conditioner is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and particularly relates to a heat pump air conditioning system and a heating start control method and device. BACKGROUND

[0002] As a key equipment to ensure the comfort of the passenger car interior environment and the stable operation of the battery system, the system composition and operation logic of the top-mounted integrated battery thermal management passenger car heat pump air conditioner directly affect the overall performance. Such an air conditioning system is usually composed of a compressor, a condenser, an evaporator, a plate heat exchanger, an electronic expansion valve, a four-way valve, an axial flow fan, a centrifugal fan, an air conditioner controller and various sensors and other core components. In the actual application scenario, after the air conditioner is powered on and receives relevant operation instructions, the air conditioner controller will first collect the signals fed back by each control component, make logical judgments through the built-in algorithm, and then output corresponding control signals according to the system preset control logic to drive each related component to execute actions cooperatively, so as to realize the functions of air conditioning, heating or battery thermal management and the like.

[0003] From the operation mode, the heating operation mode of the top-mounted integrated battery thermal management passenger car heat pump air conditioner mainly includes three modes, namely, single air conditioner heating mode, single battery heating mode and air conditioner and battery cooperative heating mode. However, in the heating mode, especially in cold environments, the air conditioning system faces a significant operating efficiency bottleneck. Because of the limited heat that can be extracted in low-temperature air, the air conditioner needs to consume more energy and do more work to complete the target heat exchange task, resulting in a significant reduction in heating efficiency. More seriously, in extremely cold weather conditions, in order to overcome the huge temperature difference between the inside and outside of the vehicle, the compressor often needs to be continuously operated for a long time, which not only causes the system pressure difference to increase sharply, but also significantly increases the operating load and wear degree of the compressor. This problem is more prominent when the air conditioner appears abnormal shutdown during actual operation, which seriously affects the stability and service life of the system.

[0004] Under the prior art system, the air conditioning system also has two key defects, which further restricts its performance improvement and safe operation. On the one hand, when running in cold weather, the air conditioner is prone to abnormal shutdown (such as sudden power failure), at which time the compressor stops running directly, without going through the necessary frequency reduction and pressure equalization process, resulting in a high pressure difference remaining in the air conditioning system. When the air conditioner starts again, the high pressure difference in the system will cause the liquid refrigerant to enter the compressor directly, causing liquid strike phenomenon, causing abnormal wear of the compressor, and even directly damaging the compressor, greatly shortening the service life of the equipment. On the other hand, from the perspective of demand priority, the demand for air conditioning heating during bus operation is usually much greater than the demand for battery heating. In theory, when air conditioning and battery heating demand exist at the same time, a hierarchical and priority control strategy should be adopted to ensure reasonable allocation of system resources. However, in actual operation control, in order to simplify the control logic, the existing technology mostly adopts a synchronous control mode of air conditioning and battery, without realizing precise priority control, which not only easily leads to uneven distribution of refrigerant in the system, but also causes fluctuations in the operating state of the compressor, reducing the operating stability, and is difficult to meet the reliable operation requirements of the bus under complex working conditions. Based on the above status, how to realize precise and efficient control of air conditioning heating start is a problem to be solved by those skilled in the art. SUMMARY

[0005] The embodiment of the present application provides a heat pump air conditioning system and a heating start control method and device, which aims to realize precise and efficient control of air conditioning heating start.

[0006] In a first aspect, the embodiment of the present application provides a heat pump air conditioning system, comprising:

[0007] a compressor, provided with a suction port and a discharge port;

[0008] a gas-liquid separator, one end of which is connected with the suction port of the compressor;

[0009] an air conditioning four-way valve, a first air conditioning valve port of the air conditioning four-way valve being connected with the other end of the gas-liquid separator;

[0010] a battery four-way valve, a first battery valve port of the battery four-way valve being connected with the other end of the gas-liquid separator;

[0011] a condenser, one end of which is connected with a second air conditioning valve port of the air conditioning four-way valve;

[0012] an evaporator, one end of which is connected with a third air conditioning valve port of the air conditioning four-way valve, and the other end of which is connected with the other end of the condenser;

[0013] an air conditioning electromagnetic valve, one end of which is connected with a fourth air conditioning valve port of the air conditioning four-way valve, and the other end of which is connected with the discharge port of the compressor;

[0014] The battery solenoid valve has one end connected to the second battery valve port of the battery four-way valve and the other end connected to the exhaust port of the compressor.

[0015] The heat exchanger is connected at one end to the third battery valve port of the battery four-way valve, and at the other end to the other end of the condenser.

[0016] In a second aspect, embodiments of the present invention provide a heating start-up control method, applied to the heat pump air conditioning system as described in the first aspect, the method comprising:

[0017] In response to the heating start-up signal, the heat pump air conditioning system is controlled to enter the pressure equalization stage, and the heating demand is obtained. Then, based on the heating demand, the opening and closing of the air conditioning solenoid valve and the battery solenoid valve are controlled.

[0018] When the compressor of the heat pump air conditioning system enters the start-up phase, the operation of the heat pump air conditioning system is controlled based on the state of the air conditioning solenoid valve and the battery solenoid valve during the pressure equalization phase, and the heating demand is continuously acquired. Then, the opening and closing of the air conditioning four-way valve and the battery four-way valve are controlled based on the heating demand.

[0019] When the compressor of the heat pump air conditioning system enters the frequency boosting stage, the operation of the heat pump air conditioning system is controlled based on the state of the air conditioning solenoid valve, battery solenoid valve, air conditioning four-way valve and battery four-way valve during the startup stage.

[0020] Thirdly, embodiments of the present invention provide a heating start-up control device, comprising:

[0021] The pressure equalization control unit is used to control the heat pump air conditioning system to enter the pressure equalization stage in response to the heating start signal, and to obtain the heating demand, and then control the opening and closing of the air conditioning solenoid valve and the battery solenoid valve based on the heating demand.

[0022] The start control unit is used to control the operation of the heat pump air conditioning system based on the state of the air conditioning solenoid valve and the battery solenoid valve during the pressure equalization phase when the compressor of the heat pump air conditioning system enters the start-up phase, and to continue to acquire heating demand, and then control the opening and closing of the air conditioning four-way valve and the battery four-way valve based on the heating demand.

[0023] The frequency boost control unit is used to control the operation of the heat pump air conditioning system based on the status of the air conditioning solenoid valve, battery solenoid valve, air conditioning four-way valve and battery four-way valve during the startup phase when the compressor of the heat pump air conditioning system enters the frequency boost phase.

[0024] This invention provides a heat pump air conditioning system and a heating start-up control method and apparatus. The method includes: responding to a heating start-up signal, controlling the heat pump air conditioning system to enter a pressure equalization phase and acquiring heating demand; then controlling the opening and closing of an air conditioning solenoid valve and a battery solenoid valve based on the heating demand; when the compressor of the heat pump air conditioning system enters the start-up phase, controlling the operation of the heat pump air conditioning system based on the state of the air conditioning solenoid valve and the battery solenoid valve during the pressure equalization phase, and continuing to acquire heating demand; then controlling the opening and closing of an air conditioning four-way valve and a battery four-way valve based on the heating demand; when the compressor of the heat pump air conditioning system enters the frequency boosting phase, controlling the operation of the heat pump air conditioning system based on the state of the air conditioning solenoid valve, the battery solenoid valve, the air conditioning four-way valve, and the battery four-way valve during the start-up phase. In this embodiment of the invention, upon receiving a heating start-up signal, the heat pump air conditioning system first enters a pressure equalization stage, where it acquires heating demand and controls the switching of the air conditioner and battery solenoid valves accordingly. Subsequently, it enters a compressor start-up stage, controlling operation based on the status of the two solenoid valves from the pressure equalization stage, while continuing to acquire heating demand and controlling the switching of the air conditioner and battery four-way valves accordingly. Finally, it enters a compressor frequency ramp-up stage, controlling operation based on the status of the air conditioner solenoid valve, battery solenoid valve, air conditioner four-way valve, and battery four-way valve from the start-up stage, thus achieving heating start-up control. This embodiment of the invention, through the three stages of pressure equalization, compressor start-up, and compressor frequency ramp-up, rationally regulates the operating status of each component of the heat pump air conditioning system, thereby solving the problems of high pressure differential when the air conditioner shuts down abnormally during heating and uneven refrigerant distribution during air conditioning heating system startup. This achieves precise and efficient control of air conditioning heating start-up, ensuring stable compressor operation, improving compressor lifespan, and enhancing passenger comfort. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic block diagram of a heat pump air conditioning system provided in an embodiment of the present invention;

[0027] Figure 2 A schematic flowchart of a heating start-up control method provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of a sub-process of step S101 in a heating start-up control method provided in an embodiment of the present invention;

[0029] Figure 4This is a schematic diagram of a sub-process of step S102 in a heating start-up control method provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of a sub-process of step S103 in a heating start-up control method provided in an embodiment of the present invention;

[0031] Figure 6 This is another schematic flowchart of a heating start-up control method provided in an embodiment of the present invention;

[0032] Figure 7 A schematic block diagram of a heating start-up control device provided in an embodiment of the present invention;

[0033] Figure 8 This is a first schematic block diagram of a heating start-up control device provided in an embodiment of the present invention;

[0034] Figure 9 This is a first schematic block diagram of a heating start-up control device provided in an embodiment of the present invention;

[0035] Figure 10 This is a first schematic block diagram of a heating start-up control device provided in an embodiment of the present invention;

[0036] Figure 11 This is another schematic block diagram of a heating start-up control device provided in an embodiment of the present invention;

[0037] Figure 12 This is a schematic block diagram of an air conditioner provided in an embodiment of the present invention. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0040] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0041] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0042] Please see below. Figure 1 The present invention provides a heat pump air conditioning system, comprising:

[0043] The compressor 10 is provided with an air intake 101 and an air exhaust 102;

[0044] One end of the gas-liquid separator 20 is connected to the suction port 101 of the compressor 10;

[0045] An air conditioning four-way valve 30, wherein the first air conditioning valve port of the air conditioning four-way valve 30 is connected to the other end of the gas-liquid separator 20;

[0046] A battery four-way valve 40, wherein the first battery valve port of the battery four-way valve 40 is connected to the other end of the gas-liquid separator 20;

[0047] Condenser 50, one end of which is connected to the second air conditioning valve port of the air conditioning four-way valve 30;

[0048] Evaporator 60, one end of which is connected to the third air conditioning valve port of the air conditioning four-way valve 30, and the other end of which is connected to the other end of the condenser 50;

[0049] The air conditioning solenoid valve 70 has one end connected to the fourth air conditioning valve port of the air conditioning four-way valve 30, and the other end connected to the exhaust port 102 of the compressor 10.

[0050] One end of the battery solenoid valve 80 is connected to the second battery valve port of the battery four-way valve 40, and the other end is connected to the exhaust port 102 of the compressor 10.

[0051] The heat exchanger 90 is connected at one end to the third battery valve port of the battery four-way valve 40, and at the other end to the other end of the condenser 50.

[0052] In addition, the condenser 50 is equipped with a condensing fan 501, and the evaporator 60 is equipped with an evaporating fan 601;

[0053] The evaporator 60 is connected to the condenser 50 via an air conditioning electronic expansion valve 11;

[0054] The condenser 50 is connected to the heat exchanger 90 via a battery electronic expansion valve 12.

[0055] In this embodiment, the heat pump air conditioning system belongs to the bus roof-mounted integrated battery thermal management heat pump air conditioning system. The compressor 10, condenser 50, and condenser fan 501 are shared system components between the air conditioning system and the battery thermal management system. The air conditioning four-way valve 30, air conditioning electronic expansion valve 11, evaporator 60, and evaporator fan 601 are dedicated to the air conditioning system, while the battery four-way valve 40, battery electronic expansion valve 12, and plate heat exchanger 90 are dedicated to the battery thermal management system. The basic working principle of the heat pump air conditioning system during heating is as follows:

[0056] When only air conditioning heating is needed, the air conditioning solenoid valve 70 is open, the battery solenoid valve 80 is closed, and the battery electronic expansion valve 12 is closed. The high-temperature and high-pressure gaseous refrigerant, after being compressed by the compressor 10, enters the evaporator 60 through the air conditioning four-way valve 30. Under the action of the evaporator fan 601, it provides heat to the vehicle interior. The refrigerant is cooled and becomes liquid. Then, it enters the condenser 50 through the air conditioning electronic expansion valve 11 for throttling and pressure reduction. Under the action of the condenser fan 501, it absorbs heat from the external environment. The refrigerant absorbs heat and becomes gaseous, and then returns to the compressor 10.

[0057] When only battery heating is needed, the air conditioning solenoid valve 70 is closed, the battery solenoid valve 80 is open, and the air conditioning electronic expansion valve 11 is closed. The high-temperature and high-pressure gaseous refrigerant, after being compressed by the compressor 10, enters the plate heat exchanger 90 through the battery four-way valve 40. Under the action of the refrigerant, it provides heat to the battery. The refrigerant is cooled and becomes liquid. Then, it enters the condenser 50 through the throttling and pressure reduction of the battery electronic expansion valve 12. Under the action of the condenser fan 501, it absorbs heat from the external environment. The refrigerant absorbs heat and becomes gaseous, and then returns to the compressor 10.

[0058] When both air conditioning heating and battery heating are required simultaneously, the air conditioning solenoid valve 70 and the battery solenoid valve 80 open. The high-temperature, high-pressure gaseous refrigerant, compressed by the compressor 10, splits into two paths. One path enters the evaporator 60 through the air conditioning four-way valve 30, where it provides heat to the vehicle interior under the action of the evaporator fan 601. The refrigerant cools and becomes liquid, then passes through the air conditioning electronic expansion valve 11 for throttling and pressure reduction before entering the condenser 50. The other path enters the plate heat exchanger 90 through the battery four-way valve 40, where it provides heat to the battery under the action of the refrigerant. The refrigerant cools and becomes liquid, then passes through the battery electronic expansion valve 12 for throttling and pressure reduction before entering the condenser 50. The two paths converge before the condenser fan 501, where the refrigerant absorbs heat from the external environment under the action of the condenser fan 501, turning into a gaseous state, and then returns to the compressor 10.

[0059] In practical applications, various processes and components can be added or omitted, replaced or added as needed, depending on actual requirements. For example, temperature sensors, pressure sensors, and other sensor devices can be added. Furthermore, the specific operating status, environmental conditions, system operating status, and effects of the heat pump air conditioning system should be verified based on detailed experimental testing, and some parameters need to be judged and adjusted based on the test results.

[0060] Figure 2 A heating start-up control method provided in this embodiment of the invention is applied to the heat pump air conditioning system described above. The method specifically includes steps S101 to S103.

[0061] Step S101: In response to the heating start signal, control the heat pump air conditioning system to enter the pressure equalization stage, obtain the heating demand, and then control the opening and closing of the air conditioning solenoid valve 70 and the battery solenoid valve 80 based on the heating demand.

[0062] Step S102: When the compressor 10 of the heat pump air conditioning system enters the start-up stage, the heat pump air conditioning system is controlled to operate based on the state of the air conditioning solenoid valve 70 and the battery solenoid valve 80 in the pressure equalization stage, and the heating demand is continuously acquired. Then, the opening and closing of the air conditioning four-way valve 30 and the battery four-way valve 40 are controlled based on the heating demand.

[0063] Step S103: When the compressor 10 of the heat pump air conditioning system enters the frequency increase stage, the operation of the heat pump air conditioning system is controlled based on the status of the air conditioning solenoid valve 70, battery solenoid valve 80, air conditioning four-way valve 30 and battery four-way valve 40 during the start-up stage.

[0064] In this embodiment, upon receiving the heating start-up signal, the heat pump air conditioning system first enters the pressure equalization stage, and acquires the heating demand during this stage. Based on this, it controls the switching of the air conditioner and battery solenoid valve 80. Subsequently, it enters the compressor 10 start-up stage, controlling its operation based on the status of the two solenoid valves during the pressure equalization stage, while continuing to acquire the heating demand, and again controlling the switching of the air conditioner and battery four-way valve 40. Finally, it enters the compressor 10 frequency ramp-up stage, controlling its operation based on the status of the air conditioner solenoid valve 70, battery solenoid valve 80, air conditioner four-way valve 30, and battery four-way valve 40 during the start-up stage, thereby achieving heating start-up control.

[0065] This embodiment rationally regulates the operating status of each component of the heat pump air conditioning system through three stages: the equalization stage, the compression start-up stage, and the compressor 10 frequency increase stage. This solves the problems of high pressure difference in the system when the air conditioner shuts down abnormally during heating and uneven refrigerant distribution when the air conditioning heating system starts up. This achieves precise and efficient control of the air conditioning heating start-up, ensuring the stable operation of the compressor 10, improving the service life of the compressor 10, and enhancing the comfort experience of passengers.

[0066] In one embodiment, such as Figure 3 As shown, step S101 includes steps S201 to S203.

[0067] Step S201: When the heating demand is the air conditioning heating demand, control the air conditioning solenoid valve 70 to open and control the battery solenoid valve 80 to close, and set the opening degree of the air conditioning electronic expansion valve 11 to a first opening degree value, and set the opening degree of the battery electronic expansion valve 12 to 0B; wherein, the first opening degree value is greater than 0B.

[0068] Step S202: When the heating demand is a battery heating demand, control the air conditioner solenoid valve 70 to close and control the battery solenoid valve 80 to open, and set the opening degree of the air conditioner electronic expansion valve 11 to 0B and the opening degree of the battery electronic expansion valve 12 to a second opening degree value; wherein, the second opening degree value is greater than 0B.

[0069] Step S203: When the heating demand is both air conditioning heating demand and battery heating demand, control both the air conditioning solenoid valve 70 and the battery solenoid valve 80 to open, and control the air conditioning electronic expansion valve 11 to start for n1 seconds first and then start the battery electronic expansion valve 12. Then set the opening degree of the air conditioning electronic expansion valve 11 to the first opening degree value and set the opening degree of the battery electronic expansion valve 12 to the second opening degree value.

[0070] In addition, the heating start-up control method also includes:

[0071] During the pressure equalization phase, the compressor 10 and evaporator fan 601 are controlled to be in the off state, the condenser fan 501 is controlled to maintain medium speed operation, and the air conditioning four-way valve 30 and battery four-way valve 40 are maintained in the state when the unit was last turned off.

[0072] In this embodiment, when a heating start-up signal is received, the air conditioner first enters the pressure equalization stage. This stage is to balance the pressure difference in the system and achieve reasonable refrigerant distribution. During the pressure equalization stage, the compressor 10 and the evaporator fan 601 are both in the off state, and the air conditioning four-way valve 30 and the battery four-way valve 40 remain in the state they were in when the unit was last turned off. The condenser fan 501 keeps running at medium speed, which allows for a small temperature difference between the system pipes, enabling the refrigerant to flow effectively.

[0073] If only air conditioning heating is required at this time, the air conditioning solenoid valve 70 is opened and the battery solenoid valve 80 is closed, so that the air conditioning electronic expansion valve 11 maintains its first opening value (e.g., 300B) and the battery electronic expansion valve 12 maintains its 0B (which can be understood as the battery electronic expansion valve 12 being closed). If only battery heating is required at this time, the air conditioning solenoid valve 70 is closed and the battery solenoid valve 80 is opened, so that the air conditioning electronic expansion valve 11 maintains its 0B (which can be understood as the air conditioning electronic expansion valve 11 being closed) and the battery electronic expansion valve 12 maintains its second opening value (e.g., 200B). If both air conditioning heating and battery heating are required at this time, both the air conditioning solenoid valve 70 and the battery solenoid valve 80 are opened simultaneously, and the air conditioning electronic expansion valve 11 is activated for 3 seconds before the battery electronic expansion valve 12 is activated. After that, the air conditioning electronic expansion valve 11 maintains its first opening value (e.g., 300B) and the battery electronic expansion valve 12 maintains its second opening value (e.g., 200B). It should be noted that the reason why the opening value of the air conditioner electronic expansion valve 11 when it is turned on is set to 300B and the opening value of the battery electronic expansion valve 12 when it is turned on is 200B is because there is a difference in the capacity requirements of the air conditioner and the battery. Generally speaking, the capacity requirement of the battery is relatively lower than that of the air conditioner, so a smaller amount of refrigerant is needed for heat exchange.

[0074] This embodiment effectively distributes a larger amount of refrigerant to the heat pump air conditioning system through the pressure equalization stage. In practical applications, the condenser fan 501 exits the pressure equalization stage after maintaining medium speed operation for 30 seconds, thus entering the compressor 10 start-up stage.

[0075] In one embodiment, such as Figure 4 As shown, step S102 includes steps S301 to S303.

[0076] Step S301: When the heating demand is the air conditioning heating demand, control the air conditioning four-way valve 30 to open after the compressor 10 starts for n2 seconds, and close the battery four-way valve 40. Then, set the opening degree of the air conditioning electronic expansion valve 11 and the opening degree of the battery electronic expansion valve 12 to 0B according to the external ambient temperature.

[0077] Step S302: When the heating demand is the battery heating demand, control the battery four-way valve 40 to open after the compressor 10 starts for n2 seconds, and close the air conditioner four-way valve 30. Then set the opening degree of the air conditioner electronic expansion valve 11 to 0B, and set the opening degree of the battery electronic expansion valve 12 according to the refrigerant inlet temperature.

[0078] Step S303: When the heating demand is both air conditioning heating demand and battery heating demand, control the air conditioning four-way valve 30 and the battery four-way valve 40 to open 2 seconds after the compressor 10 starts. Then, set the opening degree of the air conditioning electronic expansion valve 11 according to the external ambient temperature and the opening degree of the battery electronic expansion valve 12 according to the refrigerant inlet temperature.

[0079] In addition, the heating start-up control method also includes:

[0080] During the startup phase, the evaporator fan 601 is shut down, and the operating frequency of the compressor 10 and the operating speed of the condenser fan 501 are set according to the external ambient temperature.

[0081] This embodiment further balances the pressure difference in the system during the compressor 10 startup phase, ensuring that the compressor 10 intake has appropriate superheat and that there is no liquid refrigerant, thus enabling the compressor 10 to start smoothly. During the compressor 10 startup phase, the air conditioning solenoid valve 70 and the battery solenoid valve 80 remain in the previous phase state, and the evaporator fan 601 is turned off. Here, during the startup phase, the external ambient temperature is acquired, and the operating parameters of the compressor 10 and the condenser fan 501 are adjusted according to the external ambient temperature. For example, when the external ambient temperature is ≥5℃, the compressor 10 operates at a frequency of 30Hz, while when the external ambient temperature is <5℃, the compressor 10 operates at a frequency of 36Hz. Furthermore, when the external ambient temperature is ≥16℃, the condenser fan 501 operates at a low speed, and when the external ambient temperature is <16℃, the condenser fan 501 operates at a medium speed.

[0082] If only air conditioning heating is required at this time, the air conditioning four-way valve 30 will open 2 seconds after the compressor 10 starts, and the battery four-way valve 40 will close, i.e., the battery electronic expansion valve 12 will be set to 0B. At the same time, the opening degree of the air conditioning electronic expansion valve 11 will be set according to the external ambient temperature. For example, when the external ambient temperature is ≥15℃, the air conditioning electronic expansion valve 11 will be set to maintain an opening degree of 150B; when the external ambient temperature is <15℃, the air conditioning electronic expansion valve 11 will be set to maintain an opening degree of 120B.

[0083] If only battery heating is required at this time, the battery four-way valve 40 will open 2 seconds after the compressor 10 starts, while the air conditioning four-way valve 30 will close, and the air conditioning electronic expansion valve 11 will be set to 0B. At the same time, the opening degree of the battery electronic expansion valve 12 will be set according to the refrigerant inlet temperature. For example, when the refrigerant inlet temperature is <20℃, the battery electronic expansion valve 12 will be set to maintain an opening degree of 80B.

[0084] If both air conditioning heating and battery heating are required simultaneously, the air conditioning four-way valve 30 and the battery four-way valve 40 will open 2 seconds after the compressor 10 starts. The opening degree of the air conditioning electronic expansion valve 11 will be set according to the external ambient temperature, and the opening degree of the battery electronic expansion valve 12 will be set according to the refrigerant inlet temperature. For example, when the external ambient temperature is ≥15℃, the air conditioning electronic expansion valve 11 will be set to an opening degree of 150B; when the external ambient temperature is <15℃, the air conditioning electronic expansion valve 11 will be set to an opening degree of 120B. As another example, when the refrigerant inlet temperature is ≥20℃, the battery electronic expansion valve 12 will be set to an opening degree of 100B; when the refrigerant inlet temperature is <20℃, the battery electronic expansion valve 12 will be set to an opening degree of 80B.

[0085] Furthermore, in practical applications, after the compressor 10 maintains the target frequency for 30 seconds, it can exit the compressor 10 start-up phase and enter the compressor 10 frequency ramp-up phase.

[0086] In one embodiment, such as Figure 5 As shown, step S104 includes steps S401 to S404.

[0087] Step S401: When the heating demand is air conditioning heating demand or when the heating demand is both air conditioning heating demand and battery heating demand, obtain the continuous running time of compressor 10 and the tube temperature of evaporator 60.

[0088] Step S402: If the compressor 10 has not run for a preset time and / or the evaporator 60 has not reached a preset tube temperature, then control the evaporator fan 601 to shut down.

[0089] Step S403: If the compressor 10 runs continuously for a preset time and the evaporator 60 tube temperature reaches a preset tube temperature, then control the evaporator fan 601 to start and control the evaporator fan 601 to run according to the preset value.

[0090] Step S404: When the heating demand is a battery heating demand, the evaporator fan 601 is controlled to shut down, and the compressor 10 exits the frequency increase stage after running at a preset frequency for a specified time.

[0091] In addition, such as Figure 6 As shown, the heating start-up control method further includes steps S501 to S504.

[0092] Step S501: During the frequency increase stage, the exhaust temperature of the compressor 10 is obtained;

[0093] Step S502: When the exhaust temperature is greater than or equal to the first preset temperature, control the condenser fan 501 to operate at the high speed.

[0094] Step S501: When the exhaust temperature is less than the first preset temperature and greater than or equal to the second preset temperature, control the condenser fan 501 to operate at the medium speed; wherein, the first preset temperature is greater than the second preset temperature;

[0095] Step S503: When the exhaust temperature is lower than the second preset temperature, control the condenser fan 501 to operate at a low speed.

[0096] In this embodiment, after the pressure equalization stage and the compressor 10 start-up stage, the system is running stably. At this point, to quickly meet the heating demand, it is necessary to control the compressor 10 to smoothly and effectively increase its frequency, for example, to enable the compressor 10 to reach the system's preset target frequency at a speed of 2Hz / s. During the compressor 10 frequency increase stage, the air conditioning solenoid valve 70, battery solenoid valve 80, air conditioning four-way valve 30, battery four-way valve 40, air conditioning electronic expansion valve 11, and battery electronic expansion valve 12 remain unchanged from the previous stage. Simultaneously, the operating speed of the condenser fan 501 is set according to the exhaust temperature of the compressor 10. It is understood that when the exhaust temperature is high, the exhaust pressure also increases. Therefore, the condenser 50 requires a higher fan speed to accelerate airflow, thereby improving the heat exchange efficiency of the heat exchanger 90 and maintaining the exhaust pressure within a reasonable range. For example, when the exhaust temperature is ≥70℃ (i.e., the first preset temperature), the condenser fan 501 is operated at the high setting; when 60℃ (i.e., the second preset temperature) ≤ exhaust temperature <70℃, the condenser fan 501 is operated at the medium setting; when the exhaust temperature is <60℃, the condenser fan 501 is operated at the low setting.

[0097] In the frequency boosting unit, when there is only air conditioning heating demand or both air conditioning heating demand and battery heating demand exist simultaneously, if it is impossible to simultaneously meet the conditions of compressor 10 running continuously for a preset time (e.g., 60s) and evaporator 60 pipe temperature < preset pipe temperature (e.g., 30℃), then the evaporator fan 601 will be turned off. Conversely, if it is possible to simultaneously meet the conditions of compressor 10 running continuously for a preset time (e.g., 60s) and evaporator 60 pipe temperature < preset pipe temperature (e.g., 30℃), then the evaporator fan 601 will be turned on. After the evaporator fan 601 is turned on, its operating frequency can be set using the remote control. Afterward, the compressor 10 will maintain the target frequency for 60s before exiting the compressor 10 frequency boosting phase and entering the normal control phase of the entire unit, thus completing the heating start-up control.

[0098] Figure 7 This is a schematic block diagram of a heating start-up control device 700 provided in an embodiment of the present invention. The device 700 includes:

[0099] The pressure equalization control unit 701 is used to control the heat pump air conditioning system to perform the pressure equalization stage in response to the heating start signal, and to obtain the heating demand, and then control the opening and closing of the air conditioning solenoid valve 70 and the battery solenoid valve 80 based on the heating demand.

[0100] The start control unit 702 is used to control the operation of the heat pump air conditioning system based on the state of the air conditioning solenoid valve 70 and the battery solenoid valve 80 during the pressure equalization stage when the compressor 10 of the heat pump air conditioning system enters the start-up stage, and to continue to acquire heating demand, and then control the opening and closing of the air conditioning four-way valve 30 and the battery four-way valve 40 based on the heating demand.

[0101] The frequency increase control unit 703 is used to control the operation of the heat pump air conditioning system based on the status of the air conditioning solenoid valve 70, the battery solenoid valve 80, the air conditioning four-way valve 30 and the battery four-way valve 40 during the start-up phase when the compressor 10 of the heat pump air conditioning system enters the frequency increase phase.

[0102] In one embodiment, such as Figure 8 As shown, the pressure equalization control unit 701 includes:

[0103] The first solenoid valve control unit 801 is used to control the air conditioning solenoid valve 70 to open and the battery solenoid valve 80 to close when the heating demand is an air conditioning heating demand, and to set the opening degree of the air conditioning electronic expansion valve 11 to a first opening degree value and the opening degree of the battery electronic expansion valve 12 to 0B; wherein, the first opening degree value is greater than 0B.

[0104] The second solenoid valve control unit 802 is used to control the air conditioner solenoid valve 70 to close and the battery solenoid valve 80 to open when the heating demand is the battery heating demand, and to set the opening degree of the air conditioner electronic expansion valve 11 to 0B and the opening degree of the battery electronic expansion valve 12 to a second opening degree value; wherein the second opening degree value is greater than 0B.

[0105] The third solenoid valve control unit 803 is used to control both the air conditioning solenoid valve 70 and the battery solenoid valve 80 to open when the heating demand is both air conditioning heating demand and battery heating demand, and to control the air conditioning electronic expansion valve 11 to start for n1 seconds first and then start the battery electronic expansion valve 12, and then set the opening degree of the air conditioning electronic expansion valve 11 to a first opening degree value and set the opening degree of the battery electronic expansion valve 12 to a second opening degree value.

[0106] In one embodiment, the heating start-up control device 700 further includes:

[0107] The first control unit is used to control the compressor 10 and the evaporator fan 601 to be in a closed state during the pressure equalization stage, control the condenser fan 501 to maintain medium speed operation, and maintain the state of the air conditioning four-way valve 30 and the battery four-way valve 40 when the unit was last turned off.

[0108] In one embodiment, such as Figure 9 As shown, the start control unit 702 includes:

[0109] The first four-way valve control unit 901 is used to control the air conditioning four-way valve 30 to open after the compressor 10 starts n2 seconds and close the battery four-way valve 40 when the heating demand is the air conditioning heating demand. Then, it sets the opening degree of the air conditioning electronic expansion valve 11 and the opening degree of the battery electronic expansion valve 12 to 0B according to the external ambient temperature.

[0110] The second four-way valve control unit 902 is used to control the battery four-way valve 40 to open after the compressor 10 starts for n2 seconds when the heating demand is the battery heating demand, and to close the air conditioning four-way valve 30, and then set the opening degree of the air conditioning electronic expansion valve 11 to 0B, and set the opening degree of the battery electronic expansion valve 12 according to the refrigerant inlet temperature.

[0111] The third four-way valve control unit 903 is used to control the air conditioning four-way valve 30 and the battery four-way valve 40 to open 2 seconds after the compressor 10 starts when the heating demand is both air conditioning heating demand and battery heating demand. Then, it sets the opening degree of the air conditioning electronic expansion valve 11 according to the external ambient temperature and the opening degree of the battery electronic expansion valve 12 according to the refrigerant inlet temperature.

[0112] In one embodiment, the heating start-up control device 700 further includes:

[0113] The second control unit is used to control the evaporator fan 601 to shut down during the startup phase, and to set the operating frequency of the compressor 10 and the operating speed of the condenser fan 501 according to the external ambient temperature.

[0114] In one embodiment, such as Figure 10 As shown, the upsampling control unit 703 includes:

[0115] The pipe temperature acquisition unit 1001 is used to acquire the continuous running time of the compressor 10 and the pipe temperature of the evaporator 60 when the heating demand is an air conditioning heating demand or when the heating demand is both an air conditioning heating demand and a battery heating demand.

[0116] The first fan control unit 1002 is used to control the evaporator fan 601 to shut down if the compressor 10 has not run for a preset time and / or the evaporator 60 has not reached a preset tube temperature.

[0117] The second fan control unit 1003 is used to control the evaporator fan 601 to start if the compressor 10 runs continuously for a preset time and the evaporator 60 tube temperature reaches a preset tube temperature, and to control the evaporator fan 601 to run according to preset values.

[0118] The third fan control unit 1004 is used to control the evaporator fan 601 to shut down when the heating demand is the battery heating demand, and to exit the frequency increase stage after the compressor 10 runs at a preset frequency for a specified time.

[0119] In one embodiment, such as Figure 11 As shown, the heating start-up control device 700 further includes:

[0120] The exhaust temperature acquisition unit 1101 is used to acquire the exhaust temperature of the compressor 10 during the frequency increase phase.

[0121] The first gear control unit 1102 is used to control the condenser fan 501 to operate at the high gear when the exhaust temperature is greater than or equal to the first preset temperature;

[0122] The second gear control unit 1103 is used to control the condenser fan 501 to operate at the medium gear when the exhaust temperature is less than the first preset temperature and greater than or equal to the second preset temperature; wherein the first preset temperature is greater than the second preset temperature.

[0123] The third gear control unit 1104 is used to control the condenser fan 501 to operate at a low gear when the exhaust temperature is lower than the second preset temperature.

[0124] Since the embodiments of the apparatus and the embodiments of the method correspond to each other, please refer to the description of the embodiments of the method for the embodiments of the apparatus, which will not be repeated here.

[0125] Please see Figure 12 The present invention also provides an air conditioner 1200, which is a device with wireless and wired communication capabilities.

[0126] See Figure 12 The air conditioner 1200 includes a processor 1202, a memory, and a network interface 1205 connected via a system bus 1201. The memory may include a non-volatile storage medium 1203 and internal memory 1204.

[0127] The non-volatile storage medium 1203 can store an operating system 12031 and a computer program 12032. When the computer program 12032 is executed, it causes the processor 1202 to execute a heating start-up control method.

[0128] The processor 1202 provides computing and control capabilities to support the operation of the entire air conditioner 1200.

[0129] The internal memory 1204 provides an environment for the operation of the computer program 12032 in the non-volatile storage medium 1203. When the computer program 12032 is executed by the processor 1202, the processor 1202 can execute a heating start-up control method.

[0130] This network interface 1205 is used for network communication with other devices. Those skilled in the art will understand that... Figure 12 The structure shown is merely a block diagram of a portion of the structure related to the present invention and does not constitute a limitation on the air conditioner 1200 to which the present invention is applied. The specific air conditioner 1200 may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0131] The processor 1202 is used to run a computer program 12032 stored in a memory to implement any embodiment of the above-described heating start-up control method.

[0132] It should be understood that, in this embodiment of the invention, the processor 1202 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0133] It will be understood by those skilled in the art that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program may be stored in a storage medium, which is a computer-readable storage medium. The computer program is executed by at least one processor in the computer system to implement the process steps of the embodiments of the above methods.

[0134] This invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed, can perform the steps provided in the above embodiments. The storage medium may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0135] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0136] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A heat pump air conditioning system, characterized in that, include: The compressor is equipped with an air intake port and an air exhaust port; A gas-liquid separator, one end of which is connected to the suction port of the compressor; An air conditioning four-way valve, wherein the first air conditioning valve port of the air conditioning four-way valve is connected to the other end of the gas-liquid separator; A battery four-way valve, wherein the first battery valve port of the battery four-way valve is connected to the other end of the gas-liquid separator; A condenser, one end of which is connected to the second air conditioning valve port of the four-way air conditioning valve; An evaporator, one end of which is connected to the third air conditioning valve port of the four-way air conditioning valve, and the other end of which is connected to the other end of the condenser; An air conditioning solenoid valve has one end connected to the fourth air conditioning valve port of the air conditioning four-way valve, and the other end connected to the exhaust port of the compressor. The battery solenoid valve has one end connected to the second battery valve port of the battery four-way valve and the other end connected to the exhaust port of the compressor. The heat exchanger is connected at one end to the third battery valve port of the battery four-way valve, and at the other end to the other end of the condenser.

2. The heat pump air conditioning system according to claim 1, characterized in that, The condenser is equipped with a condensing fan, and the evaporator is equipped with an evaporating fan; The evaporator is connected to the condenser via an air conditioning electronic expansion valve; The condenser is connected to the heat exchanger via a battery-operated electronic expansion valve.

3. A heating start-up control method, applied to the heat pump air conditioning system as described in claim 1 or 2, characterized in that, The method includes: In response to the heating start-up signal, the heat pump air conditioning system is controlled to enter the pressure equalization stage, and the heating demand is obtained. Then, based on the heating demand, the opening and closing of the air conditioning solenoid valve and the battery solenoid valve are controlled. When the compressor of the heat pump air conditioning system enters the start-up phase, the operation of the heat pump air conditioning system is controlled based on the state of the air conditioning solenoid valve and the battery solenoid valve during the pressure equalization phase, and the heating demand is continuously acquired. Then, the opening and closing of the air conditioning four-way valve and the battery four-way valve are controlled based on the heating demand. When the compressor of the heat pump air conditioning system enters the frequency boosting stage, the operation of the heat pump air conditioning system is controlled based on the state of the air conditioning solenoid valve, battery solenoid valve, air conditioning four-way valve and battery four-way valve during the startup stage.

4. The heating start-up control method according to claim 3, applied to the heat pump air conditioning system according to claim 2, characterized in that, The step of responding to a heating start-up signal, controlling the heat pump air conditioning system to enter a pressure equalization phase, acquiring heating demand, and then controlling the opening and closing of the air conditioning solenoid valve and the battery solenoid valve based on the heating demand includes: When the heating demand is an air conditioning heating demand, the air conditioning solenoid valve is controlled to open, and the battery solenoid valve is controlled to close. The opening degree of the air conditioning electronic expansion valve is set to a first opening degree value, and the opening degree of the battery electronic expansion valve is set to 0B; wherein, the first opening degree value is greater than 0B. When the heating demand is a battery heating demand, the air conditioner solenoid valve is controlled to close, and the battery solenoid valve is controlled to open. The opening degree of the air conditioner electronic expansion valve is set to 0B, and the opening degree of the battery electronic expansion valve is set to a second opening degree value; wherein, the second opening degree value is greater than 0B. When the heating demand is both air conditioning heating demand and battery heating demand, the air conditioning solenoid valve and the battery solenoid valve are both opened. The air conditioning electronic expansion valve is started first for n1 seconds and then the battery electronic expansion valve is started. The opening degree of the air conditioning electronic expansion valve is set to the first opening degree value, and the opening degree of the battery electronic expansion valve is set to the second opening degree value.

5. The heating start-up control method according to claim 3, characterized in that, Also includes: During the pressure equalization phase, the compressor and evaporator are controlled to be in the off state, the condenser is controlled to be kept running at medium speed, and the air conditioning four-way valve and battery four-way valve are maintained in the state they were in when the unit was last turned off.

6. The heating start-up control method according to claim 3, characterized in that, When the compressor of the heat pump air conditioning system enters the start-up phase, the system controls its operation based on the state of the air conditioning solenoid valve and the battery solenoid valve during the pressure equalization phase, and continues to acquire heating demand. Then, based on the heating demand, the system controls the opening and closing of the air conditioning four-way valve and the battery four-way valve, including: When the heating demand is the air conditioning heating demand, the air conditioning four-way valve is controlled to open after the compressor starts n2 seconds later, and the battery four-way valve is closed. Then, the opening degree of the air conditioning electronic expansion valve is set according to the external ambient temperature, and the opening degree of the battery electronic expansion valve is set to 0B. When the heating demand is the battery heating demand, the battery four-way valve is controlled to open 2 seconds after the compressor starts and the air conditioning four-way valve is closed. Then the opening degree of the air conditioning electronic expansion valve is set to 0B, and the opening degree of the battery electronic expansion valve is set according to the refrigerant inlet temperature. When the heating demand is both air conditioning heating demand and battery heating demand, the air conditioning four-way valve and the battery four-way valve are controlled to open n2 seconds after the compressor starts. Then, the opening degree of the air conditioning electronic expansion valve is set according to the external ambient temperature, and the opening degree of the battery electronic expansion valve is set according to the refrigerant inlet temperature.

7. The heating start-up control method according to claim 3, characterized in that, Also includes: During the startup phase, the evaporator fan is shut down, and the operating frequency of the compressor and the operating speed of the condenser fan are set according to the external ambient temperature.

8. The heating start-up control method according to claim 3, characterized in that, When the compressor of the heat pump air conditioning system enters the frequency ramp-up phase, the operation of the heat pump air conditioning system is controlled based on the states of the air conditioning solenoid valve, battery solenoid valve, air conditioning four-way valve, and battery four-way valve during the startup phase, including: When the heating demand is an air conditioning heating demand or when the heating demand is both an air conditioning heating demand and a battery heating demand, obtain the compressor's continuous operating time and the evaporator tube temperature. If the compressor's continuous operating time does not reach the preset time and / or the evaporator tube temperature does not reach the preset tube temperature, then the evaporator fan is controlled to shut down; If the compressor runs continuously for a preset time and the evaporator tube temperature reaches a preset tube temperature, the evaporator fan is controlled to start and the evaporator fan is controlled to run according to the preset value. When the heating demand is for battery heating, the evaporator fan is shut down, and the compressor exits the frequency ramp-up phase after running at a preset frequency for a specified time.

9. The heating start-up control method according to claim 3, characterized in that, Also includes: During the frequency up-up phase, the exhaust temperature of the compressor is obtained; When the exhaust temperature is greater than or equal to the first preset temperature, the condenser fan is controlled to operate at the high speed. When the exhaust temperature is less than the first preset temperature and greater than or equal to the second preset temperature, the condenser fan is controlled to operate at the medium speed; wherein, the first preset temperature is greater than the second preset temperature; When the exhaust temperature is lower than the second preset temperature, the condenser fan is controlled to operate at a low speed.

10. A heating start-up control device, characterized in that, include: The pressure equalization control unit is used to control the heat pump air conditioning system to enter the pressure equalization stage in response to the heating start signal, and to obtain the heating demand, and then control the opening and closing of the air conditioning solenoid valve and the battery solenoid valve based on the heating demand. The start control unit is used to control the operation of the heat pump air conditioning system based on the state of the air conditioning solenoid valve and the battery solenoid valve during the pressure equalization phase when the compressor of the heat pump air conditioning system enters the start-up phase, and to continue to acquire heating demand, and then control the opening and closing of the air conditioning four-way valve and the battery four-way valve based on the heating demand. The frequency boost control unit is used to control the operation of the heat pump air conditioning system based on the status of the air conditioning solenoid valve, battery solenoid valve, air conditioning four-way valve and battery four-way valve during the startup phase when the compressor of the heat pump air conditioning system enters the frequency boost phase.

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