Air conditioner and control method and device thereof, storage medium and computer program product

Abstract

The invention discloses an air conditioner, a control method and device of the air conditioner, a storage medium and a computer program product. Two or more sets of electric heating assemblies with heating power from small to large are sequentially arranged in the direction from a refrigerant inlet to a refrigerant outlet of each refrigerant pipe during heating operation of the air conditioner. When the air conditioner is in heating operation and the electric auxiliary heating device is in an automatic operation state or a starting state, more than two groups of electric heating components are controlled to act step by step by combining at least one of outdoor environment temperature of the air conditioner, indoor environment temperature of the air conditioner, pipe temperature of an indoor heat exchanger, set temperature of the air conditioner and air gear of an indoor fan; therefore, more than two groups of electric heating assemblies in the electric auxiliary heating device are controlled to act completely or partially. According to the scheme, the heating power changes step by step when the electric auxiliary heating device is turned on or turned off, temperature difference changes before and after the electric auxiliary heating device quits work are reduced, and comfort is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and specifically relates to a control method, device, air conditioning, storage medium and computer program product of an air conditioning, and in particular to a control method, device, heat pump air conditioning, storage medium and computer program product of an operating mode of an electric auxiliary heating device of a heat pump air conditioning. Background Art

[0002] When the air conditioner (such as a heat pump air conditioner) is heating in winter, the heating capacity will decrease as the outdoor temperature drops. The lower the outdoor temperature, the higher the demand for air conditioning heating. In order to make up for the insufficient output of the air conditioner, an electric auxiliary heating device is usually used to perform auxiliary electric heating to increase the heating output of the air conditioner. In related solutions, the switch of the electric auxiliary heating device is controlled by the indoor ambient temperature and the indoor heat exchanger tube temperature. However, when the electric auxiliary heating device is turned on and off, the air outlet temperature of the air conditioner drops significantly, which can easily cause discomfort to users.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The object of the present invention is to provide a control method and device for an air conditioner, an air conditioner, a storage medium and a computer program product, so as to solve the problem that in the related scheme, the air conditioner (such as a heat pump air conditioner) controls the switch of an electric auxiliary heating device by the indoor ambient temperature and the indoor heat exchanger tube temperature, but the air outlet temperature of the air conditioner decreases greatly during the process of the electric auxiliary heating device being turned on and off, thereby affecting the user experience. The heating power is gradually changed when the electric auxiliary heating device is turned on or off, thereby reducing the temperature difference change before and after the electric auxiliary heating device stops working and improving the comfort.

[0005] The present invention provides a control method for an air conditioner, wherein the indoor unit of the air conditioner comprises an indoor heat exchanger, an electric auxiliary heating device and an indoor fan; the indoor heat exchanger comprises one or more refrigerant pipes; the electric auxiliary heating device comprises two or more groups of electric heating components with different heating powers; for each of the one or more refrigerant pipes, the two or more groups of electric heating components with heating powers from small to large are arranged in sequence along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation; the control method for the air conditioner comprises: when the air conditioner is in heating operation, obtaining the outdoor environment temperature of the air conditioner, obtaining the indoor environment temperature of the air conditioner, obtaining the pipe temperature of the indoor heat exchanger, obtaining the set temperature of the air conditioner, obtaining the wind speed of the indoor fan, and obtaining the set state of the electric auxiliary heating device; the set state of the electric auxiliary heating device comprises Any of the following states: the automatic operation state of the electric auxiliary heating device, the on state of the electric auxiliary heating device, and the off state of the electric auxiliary heating device; if the set state of the electric auxiliary heating device is the off state of the electric auxiliary heating device, the two or more groups of electric heating components are maintained or controlled to be turned off, so as to maintain or control the two or more groups of electric heating components in the electric auxiliary heating device to be all turned off; if the set state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device or the on state of the electric auxiliary heating device, the two or more groups of electric heating components are controlled to act step by step in combination with at least one of the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the windshield of the indoor fan, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to act all or partly.

[0006] In some embodiments, the two or more groups of electric heating components include: a first electric heating component, a second electric heating component and a third electric heating component; the first electric heating component, the second electric heating component and the third electric heating component are connected in parallel; wherein, in the first electric heating component, the second electric heating component and the third electric heating component, each group of electric heating components includes: two or more electric heating plates with the same heating power, and / or two or more electric heating plates with different heating powers; in each group of electric heating components, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, the two or more electric heating plates with heating powers from small to large are arranged in sequence; and / or, for each of the more than one refrigerant pipes, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, each refrigerant pipe has three parts: a front end, a middle end and a terminal end; the first electric heating component is arranged at the front end of each refrigerant pipe, the second electric heating component is arranged in the middle of each refrigerant pipe, and the third electric heating component is arranged at the end of each refrigerant pipe.

[0007] In some embodiments, in combination with the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the tube temperature of the indoor heat exchanger, the set temperature of the air conditioner, and at least one of the windshield of the indoor fan, the two or more groups of electric heating components are controlled to act step by step to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to act, including: when the two or more groups of electric heating components in the electric auxiliary heating device are all turned off, according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner, determining whether the electric auxiliary heating device needs to be turned on; if it is determined that the electric auxiliary heating device needs to be turned on The device controls the two or more electric heating components to be turned on step by step according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more electric heating components in the electric auxiliary heating device to be fully or partially turned on; and / or, when the two or more electric heating components in the electric auxiliary heating device are all turned on, the two or more electric heating components are controlled to be turned off step by step according to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind speed of the indoor fan, or according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more electric heating components in the electric auxiliary heating device to be fully or partially turned off.

[0008] In some embodiments, determining whether the electric auxiliary heating device needs to be turned on according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner includes: determining whether the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold, and whether the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is greater than or equal to a preset temperature difference threshold; if it is determined that it is not satisfied, determining that the electric auxiliary heating device does not need to be turned on; if it is determined that it is satisfied, determining that the electric auxiliary heating device needs to be turned on.

[0009] In some embodiments, according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, the two or more groups of electric heating components are controlled to be turned on step by step to control the two or more groups of electric heating components in the electric auxiliary heating device to be turned on in whole or in part, including: according to the correspondence between the set wind speed and the set opening temperature threshold, the set opening temperature threshold corresponding to the set wind speed that is the same as the wind speed of the indoor fan in the correspondence is determined as the opening temperature threshold of the electric auxiliary heating device corresponding to the wind speed of the indoor fan; the set state of the electric auxiliary heating device is the electric auxiliary heating device in the automatic operation state of the electric auxiliary heating device. The opening temperature threshold of the electric auxiliary heating device is less than the opening temperature threshold of the electric auxiliary heating device when the electric auxiliary heating device is in the opening state; wherein the opening temperature threshold of the electric auxiliary heating device includes: a first opening temperature, a second opening temperature, and a second opening temperature which increase in sequence; if it is determined that the tube temperature of the indoor heat exchanger is less than or equal to the first opening temperature, the two or more groups of electric heating components are controlled to be turned on; wherein, in the case where the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the third electric heating component, the second electric heating component and the first electric heating component are controlled to be turned on. The heating components are turned on in sequence at a set time interval to control all of the two or more groups of electric heating components in the electric auxiliary heating device to be turned on; if it is determined that the tube temperature of the indoor heat exchanger is greater than the first turn-on temperature and less than or equal to the second turn-on temperature, the first part of the electric heating components with large heating power in the two or more groups of electric heating components are controlled to be turned on; wherein, in the case where the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the third electric heating component and the second electric heating component are controlled to be turned on in sequence at a set time interval to control the two groups of electric auxiliary heating components in the electric auxiliary heating device to be turned on. The upper electric heating component is partially turned on; if it is determined that the tube temperature of the indoor heat exchanger is greater than the second turning-on temperature and less than or equal to the third turning-on temperature, the second part of the electric heating components with large heating power in the more than two groups of electric heating components are controlled to be turned on; the number of the second part of the electric heating components with large heating power is less than the number of the first part of the electric heating components with large heating power; wherein, in the case that the more than two groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the third electric heating component is controlled to be turned on, so as to control the more than two groups of electric heating components in the electric auxiliary heating device to be partially turned on.

[0010] In some embodiments, according to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind speed of the indoor fan, or according to the pipe temperature of the indoor heat exchanger and the wind speed of the indoor fan, the two or more groups of electric heating components are controlled to be closed step by step to control the two or more groups of electric heating components in the electric auxiliary heating device to be fully or partially closed, including: according to the correspondence between the set wind speed and the set closing temperature threshold, the set closing temperature threshold corresponding to the set wind speed that is the same as the wind speed of the indoor fan in the correspondence is determined as the first closing temperature threshold of the electric auxiliary heating device corresponding to the wind speed of the indoor fan; the set state of the electric auxiliary heating device is the automatic operation of the electric auxiliary heating device The first shutdown temperature threshold of the electric auxiliary heating device in the running state is less than the first shutdown temperature threshold of the electric auxiliary heating device in the shutdown state of the electric auxiliary heating device; wherein the first shutdown temperature threshold of the electric auxiliary heating device includes: a first shutdown temperature, a second shutdown temperature, and a second shutdown temperature that decrease in sequence; the second shutdown temperature threshold of the electric auxiliary heating device includes: a first set temperature, a second set temperature, and a third set temperature that decrease in sequence; if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the first set temperature and greater than the second set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the third shutdown temperature and less than the second shutdown temperature degree, then the first part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be turned off; wherein, in the case where the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the first electric heating component is controlled to be turned off, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned off; if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the second set temperature and greater than the first set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the second shutdown temperature and less than the first shutdown temperature, then the second part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be turned off The heating components are all turned off; the number of the second part of electric heating components with small heating power is greater than the number of the first part of electric heating components with small heating power; wherein, in the case where the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the first electric heating component and the second electric heating component are controlled to be turned off in sequence at a set time interval to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned off; if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the third set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the first shutdown temperature, the two or more groups of electric heating components are controlled to be turned off;Wherein, when the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the first electric heating component, the second electric heating component and the third electric heating component are controlled to be turned off in sequence at a set time interval, so as to control all the two or more groups of electric heating components in the electric auxiliary heating device to be turned off. ;

[0011] In accordance with the above method, the present invention provides a control device for an air conditioner on the other hand, wherein the indoor unit of the air conditioner comprises an indoor heat exchanger, an electric auxiliary heating device and an indoor fan; the indoor heat exchanger comprises one or more refrigerant pipes; the electric auxiliary heating device comprises two or more groups of electric heating components with different heating powers; for each of the one or more refrigerant pipes, the two or more groups of electric heating components with heating powers from small to large are arranged in sequence along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation; the control device for the air conditioner comprises: an acquisition unit configured to acquire the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, the wind speed of the indoor fan, and the set state of the electric auxiliary heating device when the air conditioner is in heating operation; the set state of the electric auxiliary heating device comprises Any of the following states: the automatic operation state of the electric auxiliary heating device, the on state of the electric auxiliary heating device, and the off state of the electric auxiliary heating device; a control unit is configured to maintain or control the two or more groups of electric heating components to be turned off if the set state of the electric auxiliary heating device is the off state of the electric auxiliary heating device, so as to maintain or control the two or more groups of electric heating components in the electric auxiliary heating device to be all turned off; the control unit is also configured to control the two or more groups of electric heating components to act step by step in combination with at least one of the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the windshield of the indoor fan if the set state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device or the on state of the electric auxiliary heating device, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to act all or part of the time.

[0012] In some embodiments, the two or more groups of electric heating components include: a first electric heating component, a second electric heating component and a third electric heating component; the first electric heating component, the second electric heating component and the third electric heating component are connected in parallel; wherein, in the first electric heating component, the second electric heating component and the third electric heating component, each group of electric heating components includes: two or more electric heating plates with the same heating power, and / or two or more electric heating plates with different heating powers; in each group of electric heating components, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, the two or more electric heating plates with heating powers from small to large are arranged in sequence; and / or, for each of the more than one refrigerant pipes, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, each refrigerant pipe has three parts: a front end, a middle end and a terminal end; the first electric heating component is arranged at the front end of each refrigerant pipe, the second electric heating component is arranged in the middle of each refrigerant pipe, and the third electric heating component is arranged at the end of each refrigerant pipe.

[0013] In some embodiments, the control unit controls the two or more groups of electric heating components to act step by step in combination with the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the tube temperature of the indoor heat exchanger, the set temperature of the air conditioner, and at least one of the windshield of the indoor fan, so as to control the action of all or part of the two or more groups of electric heating components in the electric auxiliary heating device, including: when the two or more groups of electric heating components in the electric auxiliary heating device are all turned off, determining whether the electric auxiliary heating device needs to be turned on according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner; if it is determined that the electric auxiliary heating device needs to be turned on, In the electric auxiliary heating device, the two or more electric heating components are controlled to be turned on step by step according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more electric heating components in the electric auxiliary heating device to be fully or partially turned on; and / or, when the two or more electric heating components in the electric auxiliary heating device are all turned on, the two or more electric heating components are controlled to be turned off step by step according to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind speed of the indoor fan, or according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more electric heating components in the electric auxiliary heating device to be fully or partially turned off.

[0014] In some embodiments, the control unit determines whether the electric auxiliary heating device needs to be turned on according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner, including: determining whether the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold, and the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is greater than or equal to a preset temperature difference threshold; if it is determined that it is not satisfied, determining that the electric auxiliary heating device does not need to be turned on; if it is determined that it is satisfied, determining that the electric auxiliary heating device needs to be turned on.

[0015] In some embodiments, the control unit controls the two or more groups of electric heating components to be turned on step by step according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be turned on in whole or in part, including: according to the correspondence between the set wind speed and the set opening temperature threshold, determining the set opening temperature threshold corresponding to the set wind speed that is the same as the wind speed of the indoor fan in the correspondence as the opening temperature threshold of the electric auxiliary heating device corresponding to the wind speed of the indoor fan; the set state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device The turn-on temperature threshold of the electric auxiliary heating device is less than the turn-on temperature threshold of the electric auxiliary heating device when the electric auxiliary heating device is in the turned-on state; wherein the turn-on temperature threshold of the electric auxiliary heating device includes: a first turn-on temperature, a second turn-on temperature, and a second turn-on temperature that increase in sequence; if it is determined that the tube temperature of the indoor heat exchanger is less than or equal to the first turn-on temperature, the two or more groups of electric heating components are controlled to be turned on; wherein, in the case where the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the third electric heating component, the second electric heating component and the third electric heating component are controlled An electric heating component is turned on in sequence at a set time interval to control the two or more electric heating components in the electric auxiliary heating device to be turned on; if it is determined that the tube temperature of the indoor heat exchanger is greater than the first turn-on temperature and less than or equal to the second turn-on temperature, the first part of the electric heating components with large heating power in the two or more electric heating components are controlled to be turned on; wherein, in the case where the two or more electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the third electric heating component and the second electric heating component are controlled to be turned on in sequence at a set time interval to control the two groups of electric auxiliary heating components in the electric auxiliary heating device The above electric heating components are partially turned on; if it is determined that the tube temperature of the indoor heat exchanger is greater than the second turning-on temperature and less than or equal to the third turning-on temperature, the second part of the electric heating components with large heating power in the two or more groups of electric heating components are controlled to be turned on; the number of the second part of the electric heating components with large heating power is less than the number of the first part of the electric heating components with large heating power; wherein, in the case that the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the third electric heating component is controlled to be turned on, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned on.

[0016] In some embodiments, the control unit controls the two or more groups of electric heating components to be closed step by step according to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind speed of the indoor fan, or according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be fully or partially closed, including: according to the correspondence between the set wind speed and the set closing temperature threshold, determining the set closing temperature threshold corresponding to the set wind speed that is the same as the wind speed of the indoor fan in the correspondence as the first closing temperature threshold of the electric auxiliary heating device corresponding to the wind speed of the indoor fan; the setting state of the electric auxiliary heating device is the electric auxiliary heating device The first shut-down temperature threshold of the electric auxiliary heating device in the automatic operation state of the setting is less than the first shut-down temperature threshold of the electric auxiliary heating device in the shut-down state of the electric auxiliary heating device; wherein the first shut-down temperature threshold of the electric auxiliary heating device includes: a first shut-down temperature, a second shut-down temperature, and a second shut-down temperature that decrease in sequence; the second shut-down temperature threshold of the electric auxiliary heating device includes: a first set temperature, a second set temperature, and a third set temperature that decrease in sequence; if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the first set temperature and greater than the second set temperature, or it is determined that the pipe temperature of the indoor heat exchanger is greater than or equal to the third shut-down temperature and less than the first If the temperature of the indoor heat exchanger is greater than or equal to the second shut-down temperature and less than the first shut-down temperature, the first part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be shut down; wherein, in the case where the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the first electric heating component is controlled to be shut down to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially shut down; if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the second set temperature and greater than the first set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the second shut-down temperature and less than the first shut-down temperature, the second part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be shut down. All the electric heating components are turned off; the number of the second part of electric heating components with small heating power is greater than the number of the first part of electric heating components with small heating power; wherein, in the case where the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the first electric heating component and the second electric heating component are controlled to be turned off in sequence at a set time interval to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned off; if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the third set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the first shutdown temperature, then the two or more groups of electric heating components are controlled to be turned off;Wherein, when the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the first electric heating component, the second electric heating component and the third electric heating component are controlled to be turned off in sequence at a set time interval, so as to control all the two or more groups of electric heating components in the electric auxiliary heating device to be turned off. ;

[0017] Matching the above device, the present invention provides an air conditioner on another aspect, including: the control device of the air conditioner mentioned above.

[0018] In accordance with the above method, the present invention provides a storage medium on the other hand, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the steps of the air conditioning control method described above.

[0019] In accordance with the above method, the present invention provides a computer program product on another aspect, including a computer program, which implements the steps of the above air conditioning control method when executed by a processor.

[0020] Therefore, the scheme of the present invention is to set an electric auxiliary heating device consisting of more than two groups of electric heating components for one or more refrigerant pipes in the indoor heat exchanger of the air conditioner, and the heating power of the two or more electric heating components is different; for each of the more than one refrigerant pipes, two or more groups of electric heating components with heating power from small to large are arranged in sequence along the direction from the refrigerant inlet to the refrigerant outlet of the refrigerant pipe when the air conditioner is heating; when the air conditioner is heating, according to the outdoor ambient temperature, indoor ambient temperature, set temperature, indoor heat exchanger tube temperature, and wind speed of the indoor fan, the two or more groups of electric heating components are controlled to be opened or closed step by step, so that the heating power changes step by step (such as step-by-step change) when the electric auxiliary heating device is turned on or off, so that the air outlet temperature of the air conditioner is uniform; thereby, by changing the heating power step by step when the electric auxiliary heating device is turned on or off, the air outlet temperature of the air conditioner is uniform, the temperature difference before and after the electric auxiliary heating device stops working is reduced, and the comfort is improved.

[0021] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention.

[0022] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a flow chart of an embodiment of a method for controlling an air conditioner of the present invention;

[0024] Figure 2It is a flow chart of an embodiment of controlling all or part of the actions of the two or more groups of electric heating components in the electric auxiliary heating device in the method of the present invention;

[0025] Figure 3 A schematic diagram of a flow chart of an embodiment of determining whether the electric auxiliary heating device needs to be turned on in the method of the present invention;

[0026] Figure 4 It is a flow chart of an embodiment of controlling the two or more groups of electric heating components in the electric auxiliary heating device to be fully or partially turned on in the method of the present invention;

[0027] Figure 5 It is a flow chart of an embodiment of controlling the two or more groups of electric heating components in the electric auxiliary heating device to be fully or partially shut down in the method of the present invention;

[0028] Figure 6 A schematic structural diagram of an embodiment of a control device for an air conditioner of the present invention;

[0029] Figure 7 A schematic diagram of the relationship between the flow arrangement of the electric heating plate and the refrigerant flow path of the indoor heat exchanger;

[0030] Figure 8 It is a schematic diagram of the flow distribution of the refrigerant flow path of the indoor heat exchanger;

[0031] Fig. 9 The present invention is a flow chart of an embodiment of a method for controlling the operation mode of an electric auxiliary heating device of a heat pump air conditioner.

[0032] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0033] 10-refrigerant pipe; 11-refrigerant inlet; 12-refrigerant outlet; 20-electric heating plate; 102-acquisition unit; 104-control unit. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] In the relevant scheme, air conditioning products usually use electric auxiliary heating devices such as positive temperature coefficient (PTC) electric heating tubes. The switch of the electric auxiliary heating device is controlled by the indoor ambient temperature and the indoor heat exchanger tube temperature. The control is relatively simple, but due to the high electric heating power of the PTC electric heating tube, the electric heating power of a 3-horsepower air conditioner is usually 1500W~2500W. In the process of turning the PTC electric heating tube from on to off, the air conditioning heating output suddenly decreases, and the air outlet temperature decreases by 5℃~10℃, which can easily cause users to feel uncomfortable. Specifically, the heating output of the air conditioner = the heat of the electric auxiliary heating device + the heating of the air conditioner. The heating of the air conditioner can be regarded as unchanged before and after the PTC electric heating tube is turned on and off. Before and after the PTC electric heating tube is turned on and off, the total heat output suddenly decreases by 1500W~2500W, and the temperature reduction is more obvious.

[0036] There are also methods to control the output of the PTC electric heating tube by adjusting different duty cycles, but the controller cost is high, and the PTC electric heating tube is frequently in high-frequency operation, which greatly reduces the reliability.

[0037] Therefore, in order to improve user experience comfort, in addition to improving the heating effect of air conditioners (such as heat pump air conditioners), the design and control of auxiliary electric heating devices also need to be optimized accordingly.

[0038] Considering that in the relevant schemes, the PTC electric heating tube used in the electric auxiliary heating device of the air conditioner usually uses a single-tube or double-tube structure, but the control is generally only controlled by on-off, which is simple to control. The temperature difference before and after the electric auxiliary heating device is turned on and off is large, which affects comfort. Among them, the single-tube or double-tube structure refers to the number of PTC electric heating tubes. For example, when the electric heating power of the electric auxiliary heating device is 2000W, if it is a double-tube structure, then two 1000W electric heating tubes form an electric heating component with a total power of 2000W. Therefore, it is necessary to design an electric auxiliary heating device with a multi-stage electric heating component, and by optimizing the control logic, the multi-stage electric heating component of the electric auxiliary heating device can be gradually exited to improve comfort.

[0039] Therefore, the scheme of the present invention proposes a control method for an air conditioner, specifically a control method for the operation mode of an electric auxiliary heating device of a heat pump air conditioner, in which the process arrangement of the refrigerant flow path of the PTC electric heating tube and the indoor heat exchanger is laid out in the electric auxiliary heating device, and the output power of the electric auxiliary heating device for auxiliary electric heating is controlled to improve comfort.

[0040] According to an embodiment of the present invention, a method for controlling an air conditioner is provided. Figure 1A flow chart of an embodiment of the method of the present invention is shown. The indoor unit of the air conditioner has an indoor heat exchanger, an electric auxiliary heating device and an indoor fan; the indoor heat exchanger has one or more refrigerant pipes, and when the number of the one or more refrigerant pipes is more than two, the two or more refrigerant pipes are connected in parallel; the electric auxiliary heating device has two or more groups of electric heating components with different heating powers, that is, the heating power of each group of electric heating components in the two or more groups of electric heating components is different from the heating power of other groups of electric heating components; for each of the more than one refrigerant pipes (such as refrigerant pipe 10), the two or more groups of electric heating components with heating powers from small to large are arranged in sequence along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, and each group of electric heating components includes two or more electric heating plates (such as electric heating plate 20), and the electric heating plate 20 can be a PTC electric heating plate; in the scheme of the present invention, Figure 1 As shown, the air conditioner control method includes: steps S110 to S130.

[0041] At step S110, when the air conditioner is in heating operation, the outdoor ambient temperature of the air conditioner is obtained, the indoor ambient temperature of the air conditioner is obtained, the pipe temperature of the indoor heat exchanger is obtained, the set temperature of the air conditioner is obtained, the wind speed of the indoor fan is obtained, and the set state of the electric auxiliary heating device is obtained; the set state of the electric auxiliary heating device includes any of the following states: the automatic operation state of the electric auxiliary heating device, the on state of the electric auxiliary heating device, and the off state of the electric auxiliary heating device. The outdoor ambient temperature of the air conditioner is such as the outdoor ambient temperature T 外环 , the indoor ambient temperature of the air conditioner is such as the indoor ambient temperature T 内环 , the tube temperature of the indoor heat exchanger is such as the indoor heat exchanger tube temperature T 内管 The set temperature of the air conditioner is such as the target temperature T set by the user. 设 The setting state of the electric auxiliary heating device is such as the setting state of the auxiliary electric heating function of the electric auxiliary heating device F 设定 .

[0042] At step S120, if the setting state of the electric auxiliary heating device is the off state of the electric auxiliary heating device, the two or more groups of electric heating components are maintained or controlled to be turned off, so as to maintain or control the two or more groups of electric heating components in the electric auxiliary heating device to be all turned off.

[0043] At step S130, if the setting state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device or the opening state of the electric auxiliary heating device, then in combination with the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the setting temperature of the air conditioner, and at least one of the windshield of the indoor fan, the two or more groups of electric heating components are controlled to act step by step to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to act. Wherein, controlling the two or more groups of electric heating components to act step by step to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device specifically includes: when the two or more groups of electric heating components are all closed, controlling the two or more groups of electric heating components to be turned on step by step to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to be turned on. Controlling the two or more groups of electric heating components to move step by step to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to move, specifically also includes: when the two or more groups of electric heating components are all turned on, controlling the two or more groups of electric heating components to turn on step by step to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to turn on.

[0044] The scheme of the present invention provides a layout scheme of a PTC electric heating tube and a control scheme for an electric auxiliary heating device to perform auxiliary electric heating output. In the electric auxiliary heating device, the process arrangement of the PTC electric heating tube and the refrigerant flow path of the indoor heat exchanger is laid out, and the output power of the electric auxiliary heating device for auxiliary electric heating is controlled according to the current load to improve comfort.

[0045] In some embodiments, the two or more groups of electric heating components include: a first electric heating component, a second electric heating component and a third electric heating component; the first electric heating component, the second electric heating component and the third electric heating component are connected in parallel.

[0046] Figure 7 The figure is a schematic diagram of the process arrangement relationship between the electric heating plate and the refrigerant flow path of the indoor heat exchanger. Figure 7As shown, the indoor heat exchanger has more than two refrigerant pipes (such as refrigerant pipe 10), and each refrigerant pipe has a refrigerant inlet (such as refrigerant inlet 11) and a refrigerant outlet (such as refrigerant outlet 12). The two or more refrigerant pipes are connected in parallel, specifically, the refrigerant inlets of all the refrigerant pipes in the two or more refrigerant pipes are collected together, and the refrigerant outlets are collected together. For example: in the case where the two or more refrigerant pipes specifically include three refrigerant pipes, in the electric auxiliary heating device of the air conditioner, three groups of electric heating components are set for the three refrigerant pipes. Each group of electric heating components includes more than two electric heating plates, and in each group of electric heating components, the arrangement of the two or more electric heating plates is associated with the refrigerant flow direction when the indoor heat exchanger is heated. Specifically, in each group of electric heating components, the arrangement direction of the two or more electric heating plates is arranged from high to low along the direction of the refrigerant temperature in the corresponding refrigerant pipe, and along the direction of the refrigerant temperature in the refrigerant pipe from low to high, the power of the two or more electric heating plates is from low to high. That is to say, from the refrigerant inlet to the refrigerant outlet when the refrigerant tube is hot, the power of more than two electric heating plates gradually increases, that is, the power of the electric heating plate at the refrigerant inlet when the refrigerant tube is hot is small, and the power of the electric heating plate at the refrigerant outlet when the refrigerant tube is hot is slightly larger, in a stepped shape.

[0047] In the solution of the present invention, the three groups of electric heating components are specifically: a first group of electric heating components, a second group of electric heating components and a third group of electric heating components. The first group of electric heating components, the second group of electric heating components and the third group of electric heating components are connected in parallel. Figure 7 In the example shown, three groups of electric heating components share a neutral line, and the live line ends are controlled separately, and the working state of each group of electric heating components can be controlled separately. Each live line has a relay switch, which can control whether a certain group of electric heating components is powered on or not.

[0048] The first group of electric heating components are the electric heating plates connected in series at the front end of each flow path, and their power accounts for approximately A% of the total power (A ranges from 20 to 40, preferably 25); the second group of heating plates are the heating plates in series at the middle position of each flow path, and their power accounts for approximately B% of the total power (B ranges from 20 to 40, preferably 30); the third group of heating plates are the heating plates at the end of each flow path, and their power accounts for approximately C% of the total power (C ranges from 30 to 50, preferably 45).

[0049] In the scheme of the present invention, the number of electric heating components in the electric auxiliary heating device can be set according to actual needs. The preferred scheme is three groups, which can take into account both effect and cost, because if the number of electric heating components is small, the step control effect will be poor, and if the number of electric heating components is large, the number of separate control paths will increase, resulting in increased control costs.

[0050] In some embodiments, in the first electric heating component, the second electric heating component and the third electric heating component, each group of electric heating components includes: more than two electric heating plates with the same heating power, and / or more than two electric heating plates with different heating powers; in each group of electric heating components, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, the more than two electric heating plates are arranged in sequence from small to large heating power.

[0051] Figure 7 The numbers on the electric heating plate represent different groups of electric heating plates. 1, 2, and 3 represent the groups. The value 1 represents the electric heating plate in the first group of electric heating components, 2 represents the electric heating plate in the second group of electric heating components, and 3 represents the electric heating plate in the third group of electric heating components. The relationship between the electric heating plate and the flow path arrangement is as follows: Figure 7 As shown. Figure 7 In the example shown, the multiple electric heating plates arranged at each refrigerant pipe are marked as 1, 2, and 3. For example: the electric heating plates 1, 1, 2, 2, 3, 3, and 3 are arranged in series along the direction from the refrigerant inlet to the refrigerant outlet when the first refrigerant pipe is heated. The electric heating plates 1, 1, 2, 2, 2, 3, 3, and 3 are arranged in series along the direction from the refrigerant inlet to the refrigerant outlet when the second refrigerant pipe is heated. The electric heating plates 1, 1, 2, 2, 2, 3, 3, and 3 are arranged in series along the direction from the refrigerant inlet to the refrigerant outlet when the second refrigerant pipe is heated. The electric heating plates 1, 1, 2, 2, 2, 3, 3, and 3 are arranged in series along the direction from the refrigerant inlet to the refrigerant outlet when the third refrigerant pipe is heated.

[0052] The number of electric heating plates in each group of electric heating components and the power of each plate can be different. For individual electric heating plates, the power of each electric heating plate can be different. Generally, in the same electric heating component, several electric heating plates with different powers are arranged and combined. Generally speaking, the total power distribution of each group can be controlled to be A%, B%, and C%. As for its distribution, generally speaking, the power of a single plate in a high-power position will be higher.

[0053] In the scheme of the present invention, the electric heating plate arrangement and the heat distribution on the refrigerant flow path are highly matched and grouped based on the layout relationship between the electric auxiliary heating device arrangement and the refrigerant flow path of the indoor heat exchanger, as well as the step-by-step control of the opening and closing of the electric auxiliary heating device, solve the problem of large temperature difference before and after the electric auxiliary heating device is turned on and off in related schemes, which is beneficial to improving user comfort.

[0054] In some embodiments, for each of the more than one refrigerant pipes, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, each refrigerant pipe has three parts: a front end, a middle part, and an end part; the first electric heating component is arranged at the front end of each refrigerant pipe, the second electric heating component is arranged in the middle of each refrigerant pipe, and the third electric heating component is arranged at the end of each refrigerant pipe.

[0055] like Figure 7 As shown in the figure, the pipeline from the refrigerant inlet to the refrigerant outlet of the refrigerant pipe is called a flow path. For example, three refrigerant pipes have three refrigerant inlets and three refrigerant outlets, which are called three-way flow paths. The front end of each flow path refers to the position from the refrigerant inlet position to 1 / 3 of the total flow length, the middle section is from the refrigerant inlet position to 1 / 3 to 2 / 3 of the total flow length, and the end is from the refrigerant inlet position to 2 / 3 of the total flow length to the refrigerant outlet. Figure 8 The figure is a schematic diagram of the flow distribution of the refrigerant flow path of the indoor heat exchanger. Figure 8 As shown, taking the first refrigerant pipe as an example, the parts represented by the three boxes from left to right are the front end, the middle, and the end, respectively.

[0056] In the scheme of the present invention, a multi-stage electric heating component based on the layout relationship between the electric auxiliary heating device arrangement and the refrigerant flow path of the indoor heat exchanger is designed, and an electric auxiliary device control strategy based on the layout relationship between the electric auxiliary heating device arrangement and the refrigerant flow path of the indoor heat exchanger is proposed, so that the multi-stage electric heating components of the electric auxiliary heating device can be gradually shut down, the temperature difference before and after the electric auxiliary heating device is shut down can be reduced, and the comfort can be improved.

[0057] In some embodiments, in step S130, the two or more groups of electric heating components are controlled to act step by step in combination with the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the tube temperature of the indoor heat exchanger, the set temperature of the air conditioner, and at least one of the windshield of the indoor fan, so as to control the action of all or part of the two or more groups of electric heating components in the electric auxiliary heating device, including: a process of controlling the electric auxiliary heating device to turn on, and / or a process of controlling the electric auxiliary heating device to turn off.

[0058] Combine the following Figure 2 The flowchart of an embodiment of controlling the full or partial actions of the two or more groups of electric heating components in the electric auxiliary heating device in the method of the present invention is shown, further illustrating the specific process of controlling the full or partial actions of the two or more groups of electric heating components in the electric auxiliary heating device in step S130, including: the process of controlling the electric auxiliary heating device to be turned on as shown in steps S210 to S220, and / or the process of controlling the electric auxiliary heating device to be turned off as shown in step S230. The process of controlling the electric auxiliary heating device to be turned on is as follows:

[0059] Step S210, when the set state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device or the turned-on state of the electric auxiliary heating device, when the two or more groups of electric heating components in the electric auxiliary heating device are all turned off, that is, when the two or more groups of electric heating components are all turned off, determine whether the electric auxiliary heating device needs to be turned on according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner.

[0060] Step S220: If it is determined that the electric auxiliary heating device needs to be turned on, the two or more groups of electric heating components are controlled to be turned on step by step according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be fully or partially turned on; of course, if it is determined that the electric auxiliary heating device does not need to be turned on, the electric auxiliary heating device is controlled to be turned off or kept turned off.

[0061] In the scheme of the present invention, the lower the indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger tube temperature, etc., the more electric heating components are turned on. At the same time, the electric heating components close to the end of the process (i.e., the third group of electric heating components) are turned on first, followed by the second group of electric heating components, and finally the first group of electric heating components, so that the auxiliary electric heating ladder of the electric auxiliary heating device is put into use, which effectively reduces temperature fluctuations and improves comfort.

[0062] In some embodiments, in combination with at least one of the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the windshield of the indoor fan, the two or more groups of electric heating components are controlled to act step by step to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to act, and further comprising: the process of controlling the electric auxiliary heating device to start is as follows:

[0063] Step S230, when the set state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device or the turned-on state of the electric auxiliary heating device, when the two or more groups of electric heating components in the electric auxiliary heating device are all turned on, that is, when the two or more groups of electric heating components are all turned on, according to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind speed of the indoor fan, or according to the pipe temperature of the indoor heat exchanger and the wind speed of the indoor fan, the two or more groups of electric heating components are controlled to be turned off step by step, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be all or partially turned off.

[0064] In the scheme of the present invention, when the indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger tube temperature, etc. reach the target value, the first group of electric heating components is turned off first, followed by the second group of electric heating components, and finally the third group of electric heating components. By shutting down different groups of electric heating components in an orderly manner according to conditions, the auxiliary electric heating ladder of the electric auxiliary heating device is withdrawn from use, which effectively reduces temperature fluctuations and improves comfort.

[0065] In the scheme of the present invention, when controlling the electric auxiliary heating device, the opening and closing of each group of electric heating components in the electric auxiliary heating device are controlled by the indoor ambient temperature, the outdoor ambient temperature, the indoor heat exchanger tube temperature, etc. The lower the temperature of the indoor ambient temperature, the outdoor ambient temperature, the indoor heat exchanger tube temperature, etc., the more electric heating components are turned on, and at the same time, the electric heating components near the end of the process (i.e., the third group of electric heating components) are turned on first, followed by the second group of electric heating components, and finally the first group of electric heating components are turned on. When the temperature of the indoor ambient temperature, the outdoor ambient temperature, the indoor heat exchanger tube temperature, etc. reaches the target value, the first group of electric heating components is turned off first, followed by the second group of electric heating components, and finally the third group of electric heating components. Of course, for different groups of electric heating components, the entire group is turned on or off. In this way, by turning on and off different groups of electric heating components in an orderly manner according to conditions, the auxiliary electric heating of the electric auxiliary heating device is put into use and withdrawn from use in a step-by-step manner, which effectively reduces temperature fluctuations and improves comfort.

[0066] In some embodiments, the specific process of determining whether the electric auxiliary heating device needs to be turned on according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner in step S210 is described in the following exemplary embodiment.

[0067] Combine the following Figure 3 The flowchart of an embodiment of determining whether the electric auxiliary heating device needs to be turned on in the method of the present invention is shown, which further illustrates the specific process of determining whether the electric auxiliary heating device needs to be turned on in step S210, including: steps S310 to S330.

[0068] Step S310, determining whether the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold, and whether the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is greater than or equal to a preset temperature difference threshold; wherein the preset outdoor temperature threshold is such as temperature T k ℃, preset temperature difference threshold such as Tc℃.

[0069] Step S320: If it is determined that the condition is not satisfied, it is determined that the electric auxiliary heating device does not need to be turned on.

[0070] Step S330: If it is determined that the conditions are met, it is determined that the electric auxiliary heating device needs to be turned on.

[0071] Fig. 9 FIG. 1 is a flow chart of an embodiment of a method for controlling the operation mode of an electric auxiliary heating device of a heat pump air conditioner. Fig. 9 As shown, the control method of the operation mode of the electric auxiliary heating device of the heat pump air conditioner includes:

[0072] Step 1: When the air conditioner is running in heating mode, detect the indoor ambient temperature T 内环 , Outdoor ambient temperature T 外环 , Indoor heat exchanger tube temperature T 内管 , the setting state F of the auxiliary electric heating function of the electric auxiliary heating device 设定 , the user sets the target temperature T 设 , then execute step 2 or step 5 or step 6. Setting state F of the auxiliary electric heating function of the electric auxiliary heating device 设定 There are three states: electric auxiliary heating device on, electric auxiliary heating device off, and electric auxiliary heating device automatic.

[0073] Step 2: When the auxiliary electric heating function of the electric auxiliary heating device is set to the state F 设定 When the electric auxiliary heating device is in automatic state, determine whether the outdoor ambient temperature T 外环 ≤Temperature T k ℃, and the user sets the target temperature T 设 -Indoor ambient temperature T 内环 ≥Temperature Tc℃: If yes, execute step 3 to control the three groups of electric heating components to open step by step, otherwise end the current control of the electric auxiliary heating device.

[0074] In the solution of the present invention, whether the electric auxiliary heating device needs to be turned on is determined according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner, so that when it is determined that the electric auxiliary heating device does not need to be turned on, the electric auxiliary heating device is controlled or kept turned off to save energy, and when it is determined that the electric auxiliary heating device needs to be turned on, the turning-on strategy of the electric auxiliary heating device is executed to timely improve the user experience.

[0075] In some embodiments, in step S220, according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, the two or more groups of electric heating components are controlled to be opened step by step to control the specific process of fully or partially opening the two or more groups of electric heating components in the electric auxiliary heating device. Please refer to the following exemplary description.

[0076] Combine the following Figure 4The flowchart of an embodiment of controlling all or part of the two or more electric heating components in the electric auxiliary heating device to be turned on in the method of the present invention is shown, further illustrating the specific process of controlling all or part of the two or more electric heating components in the electric auxiliary heating device to be turned on in step S220, including: steps S410 to S440.

[0077] Step S410, according to the correspondence between the set wind speed and the set turn-on temperature threshold, the set turn-on temperature threshold corresponding to the set wind speed that is the same as the wind speed of the indoor fan in the correspondence is determined as the turn-on temperature threshold of the electric auxiliary heating device corresponding to the wind speed of the indoor fan; the set state of the electric auxiliary heating device is the turn-on temperature threshold of the electric auxiliary heating device in the automatic operation state of the electric auxiliary heating device, which is less than the turn-on temperature threshold of the electric auxiliary heating device when the electric auxiliary heating device is in the turned-on state; wherein the turn-on temperature threshold of the electric auxiliary heating device includes: a first turn-on temperature, a second turn-on temperature, and a second turn-on temperature that increase in sequence; the first turn-on temperature is such as temperature TA1, the second turn-on temperature is such as temperature TA2, and the third turn-on temperature is such as temperature TA3.

[0078] Step S420, if it is determined that the tube temperature of the indoor heat exchanger is less than or equal to the first turn-on temperature, the two or more groups of electric heating components are controlled to be turned on. Preferably, the two or more groups of electric heating components are controlled to be turned on in sequence according to the heating power from large to small at a set time interval; wherein, when the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the third electric heating component, the second electric heating component and the first electric heating component are controlled to be turned on in sequence according to the set time interval, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be all turned on.

[0079] Step S430, if it is determined that the tube temperature of the indoor heat exchanger is greater than the first turn-on temperature and less than or equal to the second turn-on temperature, then the first part of the electric heating components with large heating power in the two or more groups of electric heating components are controlled to be turned on. Preferably, the first part of the electric heating components with large heating power in the two or more groups of electric heating components are controlled to be turned on in sequence according to the set time intervals in the order of heating power from large to small; wherein, in the case that the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the third electric heating component and the second electric heating component are controlled to be turned on in sequence according to the set time intervals, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned on.

[0080] Step S440, if it is determined that the tube temperature of the indoor heat exchanger is greater than the second turn-on temperature and less than or equal to the third turn-on temperature, then the second part of the electric heating components with large heating power in the two or more groups of electric heating components are controlled to be turned on. Preferably, the second part of the electric heating components with large heating power in the two or more groups of electric heating components are controlled to be turned on in sequence from large to small heating power according to the set time interval; the number of the second part of the electric heating components with large heating power is less than the number of the first part of the electric heating components with large heating power; wherein, in the case that the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the third electric heating component is controlled to be turned on, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned on.

[0081] like Fig. 9 As shown, the control method of the operation mode of the electric auxiliary heating device of the heat pump air conditioner also includes: step 3, if the outdoor ambient temperature T 外环 ≤Temperature T k ℃(Temperature T k The value range is 0℃~10℃, preferably 2℃), and the user sets the target temperature T 设 -Indoor ambient temperature T 内环 ≥Tc℃ (temperature Tc range is 1℃~5℃, preferably 3℃), turn on the electric auxiliary heating device according to the following conditions: judge the indoor heat exchanger tube temperature T 内管 The temperature range is based on the indoor heat exchanger tube temperature T 内管 The temperature range controls the opening of the first group of electric heating components, the second group of electric heating components and the third group of electric heating components, see step 31, step 32 and step 33 for details.

[0082] Step 31: If the indoor heat exchanger tube temperature T 内管 ≤temperature TA1, turn on the third group of electric heating components, the second group of electric heating components and the first group of electric heating components at the same time, and then execute step 4.

[0083] Step 32: If the indoor heat exchanger tube temperature T 内管 ≤Temperature TA2, turn on the third and second groups of electric heating components at the same time.

[0084] Step 33: If the indoor heat exchanger tube temperature T 内管 ≤Temperature TA3, only the third group of electric heating components is turned on.

[0085] The values ​​of temperature TA1, temperature TA2, and temperature TA3 are associated with the wind speed of the indoor fan. For details, please refer to the example shown in Table 1.

[0086] Table 1

[0087] Windshield TA1(unit:℃) TA2(unit:℃) TA3 (unit: °C) Super strong windshield 42 46 50 High windshield 42 45 48 Stroke 40 43 46 Low wind speed 38 41 44

[0088] In step 3, it can be seen from Table 1 that from the setting parameters, temperature TA1 < temperature TA2 < temperature TA3, when the indoor heat exchanger tube temperature T 内管 The lower the temperature, the higher the power of the electric auxiliary heating device that needs to be turned on (that is, the more groups of electric heating components); when the indoor heat exchanger tube temperature T 内管 When the temperature is high, only the electric heating components close to the refrigerant outlet (where the refrigerant temperature is low) are turned on, so that the air outlet temperature of the air conditioner is more uniform in terms of spatial distribution. For example, the refrigerant temperature at the refrigerant inlet is 70°C, and the refrigerant temperature at the refrigerant outlet is 40°C. From the air outlet temperature of the air conditioner, the air outlet temperature of the air conditioner is approximately: the air outlet temperature at the refrigerant inlet is 45°C, and the air outlet temperature at the refrigerant outlet is 35°C. After turning on the auxiliary electric heating of the electric heating component at the refrigerant outlet, the air outlet temperature of the refrigerant outlet is increased by about 5°C, so that the air outlet temperature at the refrigerant inlet and outlet is more uniform.

[0089] In some embodiments, in step S230, according to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind speed of the indoor fan, or according to the pipe temperature of the indoor heat exchanger, and the wind speed of the indoor fan, the two or more groups of electric heating components are controlled to be closed step by step to control the specific process of fully or partially closing the two or more groups of electric heating components in the electric auxiliary heating device. See the following exemplary description.

[0090] Combine the following Figure 5 The flowchart of an embodiment of controlling the whole or part of the two or more electric heating components in the electric auxiliary heating device to be completely or partially turned off in the method of the present invention is shown, further illustrating the specific process of controlling the whole or part of the two or more electric heating components in the electric auxiliary heating device to be completely or partially turned off in step S230, including: steps S510 to S540.

[0091] Step S510, according to the correspondence between the set wind speed and the set shutdown temperature threshold, the set shutdown temperature threshold corresponding to the set wind speed that is the same as the wind speed of the indoor fan in the correspondence is determined as the first shutdown temperature threshold of the electric auxiliary heating device corresponding to the wind speed of the indoor fan; the set state of the electric auxiliary heating device is the first shutdown temperature threshold of the electric auxiliary heating device in the automatic operation state of the electric auxiliary heating device, which is less than the first shutdown temperature threshold of the electric auxiliary heating device in the shutdown state of the electric auxiliary heating device; wherein the first shutdown temperature threshold of the electric auxiliary heating device includes: a first shutdown temperature, a second shutdown temperature, and a second shutdown temperature that decrease in sequence; the second shutdown temperature threshold of the electric auxiliary heating device includes: a first set temperature, a second set temperature, and a third set temperature that decrease in sequence; the first shutdown temperature is such as temperature TB1, the second shutdown temperature is such as temperature TB2, the third shutdown temperature is such as temperature TB3, the first set temperature is such as 2°C, the second set temperature is such as 1°C, and the third set temperature is such as 0°C.

[0092] Step S520, if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the first set temperature and greater than the second set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the third shutdown temperature and less than the second shutdown temperature, then the first part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be turned off. Preferably, the first part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be turned off in sequence according to the set time intervals in the order of heating power from small to large; wherein, in the case that the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the first electric heating component is controlled to be turned off, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned off.

[0093] Step S530, if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the second set temperature and greater than the first set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the second shutdown temperature and less than the first shutdown temperature, then the second part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be turned off. Preferably, the second part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be turned off in sequence in order of heating power from small to large at a set time interval; the number of the second part of the electric heating components with small heating power is greater than the number of the first part of the electric heating components with small heating power; wherein, in the case where the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the first electric heating component and the second electric heating component are controlled to be turned off in sequence at a set time interval, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned off.

[0094] Step S540, if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the third set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the first shutdown temperature, then the two or more groups of electric heating components are controlled to be turned off. Preferably, the two or more groups of electric heating components are controlled to be turned off in sequence according to the heating power from small to large at a set time interval; wherein, in the case that the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the first electric heating component, the second electric heating component and the third electric heating component are controlled to be turned off in sequence according to the set time interval, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be all turned off.

[0095] like Fig. 9 As shown, the control method of the operation mode of the electric auxiliary heating device of the heat pump air conditioner also includes: step 4, after the electric auxiliary heating device is turned on, the electric auxiliary heating device is turned off according to the following conditions, specifically referring to step 41, step 42 and step 43.

[0096] If the user sets the target temperature T 设 -Outdoor ambient temperature T 内环 ≤0℃ or indoor heat exchanger tube temperature T 内管 ≥Temperature TB1, turn off the first group of electric heating components, the second group of electric heating components and the third group of electric heating components at the same time.

[0097] If the user sets the target temperature T 设 -Outdoor ambient temperature T 内环 ≤1℃ or indoor heat exchanger tube temperature T 内管 ≥Temperature TB2, turn off the first and second groups of electric heating components at the same time.

[0098] If the user sets the target temperature T 设 -Outdoor ambient temperature T 内环 ≤2℃ or indoor heat exchanger tube temperature T 内管 ≥Temperature TB3, only the first group of electric heating components is turned off.

[0099] The values ​​of temperature TB1, temperature TB2, and temperature TB3 are associated with the wind speed of the indoor fan. For details, please refer to the example shown in Table 2.

[0100] Table 2

[0101] Windshield TB1(unit:℃) TB2 (unit: °C) TB3 (unit: °C) Super strong windshield 56 53 50 High windshield 56 53 49 Stroke 55 52 48 Low wind speed 55 52 48

[0102] In step 4, the same principle as step 3 and Table 1 is used. When the indoor heat exchanger tube temperature T 内管 Reach a certain temperature or outdoor ambient temperature T 内环 Close to the user set target temperature T 设 When the air conditioner is turned off, the electric heating component near the refrigerant inlet is turned off first, which reduces the auxiliary electric heating power of the electric auxiliary heating device and improves the uniformity of the air outlet temperature of the air conditioner, thereby improving the utilization efficiency of the electric auxiliary heating device.

[0103] In step 3 and step 4, preferably, when multiple groups of electric heating components are turned on and off, each group of electric heating components is operated at an interval of t (the value of t ranges from 1s to 5s, preferably 3s) to avoid controller abnormalities caused by sudden current changes.

[0104] Step 5: When the electric auxiliary heating device is turned on, it means that the electric auxiliary heating device needs to work for a longer time. Therefore, the indoor heat exchanger tube temperature T 内管 The temperature value for turning on the electric auxiliary heating device when it is lower than TA1, TA2 and TA3 is increased by 1°C, making it easier to turn on the electric auxiliary heating device; the indoor heat exchanger tube temperature T 内管 The temperature at which the electric auxiliary heating device is shut down is also increased by 1°C when it is higher than temperature TB1, temperature TB2, and temperature TB3, so that it is more difficult for the electric auxiliary heating device to shut down, and the electric auxiliary heating device can work longer and output more heat.

[0105] In step 5, when the setting state F of the auxiliary electric heating function of the electric auxiliary heating device is 设定 When the electric auxiliary heating device is in the on state, the control method is the same as the automatic state of the electric auxiliary heating device, wherein the preferred value of temperature Tk is 7°C, the preferred value of temperature Tc is 4°C, and the values ​​of temperature TA1, temperature TA2, temperature TA3, temperature TB1, temperature TB2, and temperature TB3 are +1°C on the basis of Table 1 and Table 2, making the electric heating easier to start and more difficult to exit, thereby increasing the use time of the auxiliary electric heating.

[0106] Step 6: When the auxiliary electric heating function of the electric auxiliary heating device is set to the state F 设定 When the electric auxiliary heating device is in the off state, the first group of electric heating components, the second group of electric heating components and the third group of electric heating components are not turned on.

[0107] In the scheme of the present invention, the opening and closing of each group of electric auxiliary heating is controlled by the indoor ambient temperature, the outdoor ambient temperature, and the indoor heat exchanger tube temperature. Specifically, it is based on a multi-stage electric heating to realize the step-by-step exit of the multi-stage electric heating components of the electric auxiliary heating device, thereby reducing the temperature difference before and after the electric auxiliary heating device exits work and improving comfort.

[0108] In the scheme of the present invention, a layout relationship between the arrangement of electric auxiliary heating devices and the refrigerant flow path of the indoor heat exchanger is proposed, that is, the power of the electric heating plates arranged on the refrigerant flow path of the indoor heat exchanger is from the refrigerant inlet to the refrigerant outlet, which is in line with the air-conditioning use environment (the flow path is from the inlet to the outlet, and the refrigerant temperature is from high to low), and group control is set; compared with the control scheme using pulse width modulation (PWM) and other control schemes for controlling the voltage duty cycle, the scheme of the present invention is simple to control, low in cost, and low in engineering implementation difficulty.

[0109] In the scheme of the present invention, a control strategy for an electric auxiliary device based on the layout relationship between the arrangement of the electric auxiliary heating device and the refrigerant flow path of the indoor heat exchanger is proposed. By judging the temperature of the indoor heat exchanger tube, it is determined whether the auxiliary heating is put into operation or not, and which group or multiple groups of electric heating components are put into operation for auxiliary electric heating. In terms of control, the electric heating plates of the low-temperature refrigerant section are put into operation first, and a specific control logic is given to realize the step-by-step exit of the multi-stage electric heating components of the electric auxiliary heating device to improve comfort.

[0110] By adopting the technical solution of this embodiment, an electric auxiliary heating device consisting of more than two groups of electric heating components is set for one or more refrigerant pipes in the indoor heat exchanger of the air conditioner, and the heating power of the two or more groups of electric heating components is different; for each of the more than one refrigerant pipes, two or more groups of electric heating components with heating power from small to large are arranged in sequence along the direction from the refrigerant inlet to the refrigerant outlet of the refrigerant pipe when the air conditioner is heating; when the air conditioner is heating, according to the outdoor ambient temperature, indoor ambient temperature, set temperature, indoor heat exchanger tube temperature, and wind speed of the indoor fan, the two or more groups of electric heating components are controlled to be opened or closed step by step, so that the heating power changes step by step (such as step-by-step change) when the electric auxiliary heating device is turned on or off, so that the air outlet temperature of the air conditioner is uniform; thus, by changing the heating power step by step when the electric auxiliary heating device is turned on or off, the air outlet temperature of the air conditioner is uniform, the temperature difference before and after the electric auxiliary heating device stops working is reduced, and the comfort is improved.

[0111] According to an embodiment of the present invention, a control device for an air conditioner corresponding to the control method for an air conditioner is also provided. Figure 6 The schematic diagram of the structure of an embodiment of the device of the present invention is shown. The indoor unit of the air conditioner has an indoor heat exchanger, an electric auxiliary heating device and an indoor fan; the indoor heat exchanger has one or more refrigerant pipes, and when the number of the one or more refrigerant pipes is more than two, the more than two refrigerant pipes are connected in parallel; the electric auxiliary heating device has two or more groups of electric heating components with different heating powers, that is, the heating power of each group of electric heating components in the more than two groups of electric heating components is different from the heating power of other groups of electric heating components; for each of the more than one refrigerant pipes (such as refrigerant pipe 10), the more than two groups of electric heating components with heating power from small to large are arranged in sequence along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, and each group of electric heating components includes two or more electric heating plates (such as electric heating plate 20), and the electric heating plate 20 can be a PTC electric heating plate. In the scheme of the present invention, Figure 6 As shown, the air conditioner control device includes: an acquisition unit 102 and a control unit 104.

[0112] Wherein, the acquisition unit 102 is configured to acquire the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, the wind speed of the indoor fan, and the set state of the electric auxiliary heating device when the air conditioner is in heating operation; the set state of the electric auxiliary heating device includes any of the following states: the automatic operation state of the electric auxiliary heating device, the on state of the electric auxiliary heating device, and the off state of the electric auxiliary heating device. Wherein, the outdoor ambient temperature of the air conditioner is such as the outdoor ambient temperature T 外环 , the indoor ambient temperature of the air conditioner is such as the indoor ambient temperature T 内环 , the tube temperature of the indoor heat exchanger is such as the indoor heat exchanger tube temperature T 内管 The set temperature of the air conditioner is such as the target temperature T set by the user. 设 The setting state of the electric auxiliary heating device is such as the setting state of the auxiliary electric heating function of the electric auxiliary heating device F 设定 The specific functions and processing of the acquisition unit 102 refer to step S110.

[0113] The control unit 104 is configured to maintain or control the two or more groups of electric heating components to be turned off if the setting state of the electric auxiliary heating device is the off state of the electric auxiliary heating device, so as to maintain or control the two or more groups of electric heating components in the electric auxiliary heating device to be turned off. The specific functions and processing of the control unit 104 refer to step S120.

[0114] The control unit 104 is further configured to control the two or more groups of electric heating components to act step by step, if the setting state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device or the opening state of the electric auxiliary heating device, in combination with the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the setting temperature of the air conditioner, and at least one of the windshield of the indoor fan, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to act in whole or in part. Wherein, controlling the two or more groups of electric heating components to act step by step, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to act in whole or in part, specifically includes: when the two or more groups of electric heating components are all turned off, controlling the two or more groups of electric heating components to be turned on step by step, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be turned on in whole or in part. Controlling the two or more groups of electric heating components to operate step by step, so as to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to operate, specifically also includes: when the two or more groups of electric heating components are all turned on, controlling the two or more groups of electric heating components to turn on step by step, so as to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to turn on. The specific functions and processing of the control unit 104 are also referred to step S130.

[0115] The scheme of the present invention provides a layout scheme of a PTC electric heating tube and a control scheme for an electric auxiliary heating device to perform auxiliary electric heating output. In the electric auxiliary heating device, the process arrangement of the PTC electric heating tube and the refrigerant flow path of the indoor heat exchanger is laid out, and the output power of the electric auxiliary heating device for auxiliary electric heating is controlled according to the current load to improve comfort.

[0116] In some embodiments, the two or more groups of electric heating components include: a first electric heating component, a second electric heating component and a third electric heating component; the first electric heating component, the second electric heating component and the third electric heating component are connected in parallel.

[0117] Figure 7 The figure is a schematic diagram of the process arrangement relationship between the electric heating plate and the refrigerant flow path of the indoor heat exchanger. Figure 7As shown, the indoor heat exchanger has more than two refrigerant pipes (such as refrigerant pipe 10), and each refrigerant pipe has a refrigerant inlet (such as refrigerant inlet 11) and a refrigerant outlet (such as refrigerant outlet 12). The two or more refrigerant pipes are connected in parallel, specifically, the refrigerant inlets of all the refrigerant pipes in the two or more refrigerant pipes are collected together, and the refrigerant outlets are collected together. For example: in the case where the two or more refrigerant pipes specifically include three refrigerant pipes, in the electric auxiliary heating device of the air conditioner, three groups of electric heating components are set for the three refrigerant pipes. Each group of electric heating components includes more than two electric heating plates, and in each group of electric heating components, the arrangement of the two or more electric heating plates is associated with the refrigerant flow direction when the indoor heat exchanger is heated. Specifically, in each group of electric heating components, the arrangement direction of the two or more electric heating plates is arranged from high to low along the direction of the refrigerant temperature in the corresponding refrigerant pipe, and along the direction of the refrigerant temperature in the refrigerant pipe from low to high, the power of the two or more electric heating plates is from low to high. That is to say, from the refrigerant inlet to the refrigerant outlet when the refrigerant tube is hot, the power of more than two electric heating plates gradually increases, that is, the power of the electric heating plate at the refrigerant inlet when the refrigerant tube is hot is small, and the power of the electric heating plate at the refrigerant outlet when the refrigerant tube is hot is slightly larger, in a stepped shape.

[0118] In the solution of the present invention, the three groups of electric heating components are specifically: a first group of electric heating components, a second group of electric heating components and a third group of electric heating components. The first group of electric heating components, the second group of electric heating components and the third group of electric heating components are connected in parallel. Figure 7 In the example shown, three groups of electric heating components share a neutral line, and the live line ends are controlled separately, and the working state of each group of electric heating components can be controlled separately. Each live line has a relay switch, which can control whether a certain group of electric heating components is powered on or not.

[0119] The first group of electric heating components are the electric heating plates connected in series at the front end of each flow path, and their power accounts for approximately A% of the total power (A ranges from 20 to 40, preferably 25); the second group of heating plates are the heating plates in series at the middle position of each flow path, and their power accounts for approximately B% of the total power (B ranges from 20 to 40, preferably 30); the third group of heating plates are the heating plates at the end of each flow path, and their power accounts for approximately C% of the total power (C ranges from 30 to 50, preferably 45).

[0120] In the scheme of the present invention, the number of electric heating components in the electric auxiliary heating device can be set according to actual needs. The preferred scheme is three groups, which can take into account both effect and cost, because if the number of electric heating components is small, the step control effect will be poor, and if the number of electric heating components is large, the number of separate control paths will increase, resulting in increased control costs.

[0121] In some embodiments, in the first electric heating component, the second electric heating component and the third electric heating component, each group of electric heating components includes: more than two electric heating plates with the same heating power, and / or more than two electric heating plates with different heating powers; in each group of electric heating components, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, the more than two electric heating plates are arranged in sequence from small to large heating power.

[0122] Figure 7 The numbers on the electric heating plate represent different groups of electric heating plates. 1, 2, and 3 represent the groups. The value 1 represents the electric heating plate in the first group of electric heating components, 2 represents the electric heating plate in the second group of electric heating components, and 3 represents the electric heating plate in the third group of electric heating components. The relationship between the electric heating plate and the flow path arrangement is as follows: Figure 7 As shown. Figure 7 In the example shown, the multiple electric heating plates arranged at each refrigerant pipe are marked as 1, 2, and 3. For example: the electric heating plates 1, 1, 2, 2, 3, 3, and 3 are arranged in series along the direction from the refrigerant inlet to the refrigerant outlet when the first refrigerant pipe is heated. The electric heating plates 1, 1, 2, 2, 2, 3, 3, and 3 are arranged in series along the direction from the refrigerant inlet to the refrigerant outlet when the second refrigerant pipe is heated. The electric heating plates 1, 1, 2, 2, 2, 3, 3, and 3 are arranged in series along the direction from the refrigerant inlet to the refrigerant outlet when the second refrigerant pipe is heated. The electric heating plates 1, 1, 2, 2, 2, 3, 3, and 3 are arranged in series along the direction from the refrigerant inlet to the refrigerant outlet when the third refrigerant pipe is heated.

[0123] The number of electric heating plates in each group of electric heating components and the power of each plate can be different. For individual electric heating plates, the power of each electric heating plate can be different. Generally, in the same electric heating component, several electric heating plates with different powers are arranged and combined. Generally speaking, the total power distribution of each group can be controlled to be A%, B%, and C%. As for its distribution, generally speaking, the power of a single plate in a high-power position will be higher.

[0124] In the scheme of the present invention, the electric heating plate arrangement and the heat distribution on the refrigerant flow path are highly matched and grouped based on the layout relationship between the electric auxiliary heating device arrangement and the refrigerant flow path of the indoor heat exchanger, as well as the step-by-step control of the opening and closing of the electric auxiliary heating device, solve the problem of large temperature difference before and after the electric auxiliary heating device is turned on and off in related schemes, which is beneficial to improving user comfort.

[0125] In some embodiments, for each of the more than one refrigerant pipes, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, each refrigerant pipe has three parts: a front end, a middle part, and an end part; the first electric heating component is arranged at the front end of each refrigerant pipe, the second electric heating component is arranged in the middle of each refrigerant pipe, and the third electric heating component is arranged at the end of each refrigerant pipe.

[0126] like Figure 7 As shown in the figure, the pipeline from the refrigerant inlet to the refrigerant outlet of the refrigerant pipe is called a flow path. For example, three refrigerant pipes have three refrigerant inlets and three refrigerant outlets, which are called three-way flow paths. The front end of each flow path refers to the position from the refrigerant inlet position to 1 / 3 of the total flow length, the middle section is from the refrigerant inlet position to 1 / 3 to 2 / 3 of the total flow length, and the end is from the refrigerant inlet position to 2 / 3 of the total flow length to the refrigerant outlet. Figure 8 The figure is a schematic diagram of the flow distribution of the refrigerant flow path of the indoor heat exchanger. Figure 8 As shown, taking the first refrigerant pipe as an example, the parts represented by the three boxes from left to right are the front end, the middle, and the end, respectively.

[0127] In the scheme of the present invention, a multi-stage electric heating component based on the layout relationship between the electric auxiliary heating device arrangement and the refrigerant flow path of the indoor heat exchanger is designed, and an electric auxiliary device control strategy based on the layout relationship between the electric auxiliary heating device arrangement and the refrigerant flow path of the indoor heat exchanger is proposed, so that the multi-stage electric heating components of the electric auxiliary heating device can be gradually shut down, the temperature difference before and after the electric auxiliary heating device is shut down can be reduced, and the comfort can be improved.

[0128] In some embodiments, the control unit 104 controls the two or more groups of electric heating components to act step by step in combination with the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the tube temperature of the indoor heat exchanger, the set temperature of the air conditioner, and at least one of the windshield of the indoor fan, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to act in whole or in part, including: controlling the process of turning on the electric auxiliary heating device, specifically as follows:

[0129] The control unit 104 is further configured to determine whether to turn on the electric auxiliary heating device according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner when the set state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device or the turned-on state of the electric auxiliary heating device, and when the two or more electric heating components in the electric auxiliary heating device are all turned off, that is, when the two or more electric heating components are all turned off. The specific functions and processing of the control unit 104 are also shown in step S210.

[0130] The control unit 104 is further configured to control the two or more groups of electric heating components to be turned on step by step according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan if it is determined that the electric auxiliary heating device needs to be turned on, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be turned on in whole or in part; of course, if it is determined that the electric auxiliary heating device does not need to be turned on, the electric auxiliary heating device is controlled to be turned off or kept turned off. The specific functions and processing of the control unit 104 are also shown in step S220.

[0131] In the scheme of the present invention, the lower the indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger tube temperature, etc., the more electric heating components are turned on. At the same time, the electric heating components close to the end of the process (i.e., the third group of electric heating components) are turned on first, followed by the second group of electric heating components, and finally the first group of electric heating components, so that the auxiliary electric heating ladder of the electric auxiliary heating device is put into use, which effectively reduces temperature fluctuations and improves comfort.

[0132] In some embodiments, in combination with at least one of the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the tube temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the windshield of the indoor fan, the two or more groups of electric heating components are controlled to act step by step to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to act, and further comprising: a process of controlling the start of the electric auxiliary heating device, specifically as follows:

[0133] The control unit 104 is further configured to control the two or more groups of electric heating components to be closed step by step according to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind speed of the indoor fan, or according to the pipe temperature of the indoor heat exchanger and the wind speed of the indoor fan, when the set state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device or the open state of the electric auxiliary heating device, when the two or more groups of electric heating components in the electric auxiliary heating device are all opened, that is, when the two or more groups of electric heating components are all opened, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be closed in whole or in part. The specific functions and processing of the control unit 104 are also referred to step S230.

[0134] In the scheme of the present invention, when the indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger tube temperature, etc. reach the target value, the first group of electric heating components is turned off first, followed by the second group of electric heating components, and finally the third group of electric heating components. By shutting down different groups of electric heating components in an orderly manner according to conditions, the auxiliary electric heating ladder of the electric auxiliary heating device is withdrawn from use, which effectively reduces temperature fluctuations and improves comfort.

[0135] In the scheme of the present invention, when controlling the electric auxiliary heating device, the opening and closing of each group of electric heating components in the electric auxiliary heating device are controlled by the indoor ambient temperature, the outdoor ambient temperature, the indoor heat exchanger tube temperature, etc. The lower the temperature of the indoor ambient temperature, the outdoor ambient temperature, the indoor heat exchanger tube temperature, etc., the more electric heating components are turned on, and at the same time, the electric heating components near the end of the process (i.e., the third group of electric heating components) are turned on first, followed by the second group of electric heating components, and finally the first group of electric heating components are turned on. When the temperature of the indoor ambient temperature, the outdoor ambient temperature, the indoor heat exchanger tube temperature, etc. reaches the target value, the first group of electric heating components is turned off first, followed by the second group of electric heating components, and finally the third group of electric heating components. Of course, for different groups of electric heating components, the entire group is turned on or off. In this way, by turning on and off different groups of electric heating components in an orderly manner according to conditions, the auxiliary electric heating of the electric auxiliary heating device is put into use and withdrawn from use in a step-by-step manner, which effectively reduces temperature fluctuations and improves comfort.

[0136] In some embodiments, the control unit 104 determines whether to turn on the electric auxiliary heating device according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner, including:

[0137] The control unit 104 is further configured to determine whether the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold, and whether the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is greater than or equal to a preset temperature difference threshold; wherein the preset outdoor temperature threshold is such as temperature T k ℃, the preset temperature difference threshold is such as Tc℃. The specific functions and processing of the control unit 104 are also referred to step S310.

[0138] The control unit 104 is further configured to determine that the electric auxiliary heating device does not need to be turned on if the condition is not satisfied. The specific functions and processing of the control unit 104 are also shown in step S320.

[0139] The control unit 104 is further configured to determine that the electric auxiliary heating device needs to be turned on if the condition is satisfied. The specific functions and processing of the control unit 104 are also shown in step S330.

[0140] Fig. 9 FIG. 1 is a flow chart of an embodiment of a method for controlling the operation mode of an electric auxiliary heating device of a heat pump air conditioner. Fig. 9 As shown, the control method of the operation mode of the electric auxiliary heating device of the heat pump air conditioner includes:

[0141] Step 1: When the air conditioner is running in heating mode, detect the indoor ambient temperature T 内环 , Outdoor ambient temperature T 外环 , Indoor heat exchanger tube temperature T内管 , the setting state F of the auxiliary electric heating function of the electric auxiliary heating device 设定 , the user sets the target temperature T 设 , then execute step 2 or step 5 or step 6. Setting state F of the auxiliary electric heating function of the electric auxiliary heating device 设定 There are three states: electric auxiliary heating device on, electric auxiliary heating device off, and electric auxiliary heating device automatic.

[0142] Step 2: When the auxiliary electric heating function of the electric auxiliary heating device is set to the state F 设定 When the electric auxiliary heating device is in automatic state, determine whether the outdoor ambient temperature T 外环 ≤Temperature T k ℃, and the user sets the target temperature T 设 -Indoor ambient temperature T 内环 ≥Temperature Tc℃: If yes, execute step 3 to control the three groups of electric heating components to open step by step, otherwise end the current control of the electric auxiliary heating device.

[0143] In the solution of the present invention, whether the electric auxiliary heating device needs to be turned on is determined according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner, so that when it is determined that the electric auxiliary heating device does not need to be turned on, the electric auxiliary heating device is controlled or kept turned off to save energy, and when it is determined that the electric auxiliary heating device needs to be turned on, the turning-on strategy of the electric auxiliary heating device is executed to timely improve the user experience.

[0144] In some embodiments, the control unit 104 controls the two or more groups of electric heating components to be turned on step by step according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be turned on in whole or in part, including:

[0145] The control unit 104 is further configured to determine, according to the correspondence between the set wind speed and the set opening temperature threshold, the set opening temperature threshold corresponding to the set wind speed that is the same as the wind speed of the indoor fan in the correspondence as the opening temperature threshold of the electric auxiliary heating device corresponding to the wind speed of the indoor fan; the set state of the electric auxiliary heating device is the opening temperature threshold of the electric auxiliary heating device in the automatic operation state of the electric auxiliary heating device, which is less than the opening temperature threshold of the electric auxiliary heating device in the case of the opening state of the electric auxiliary heating device; wherein the opening temperature threshold of the electric auxiliary heating device includes: a first opening temperature, a second opening temperature, and a second opening temperature that increase in sequence; the first opening temperature is such as temperature TA1, the second opening temperature is such as temperature TA2, and the third opening temperature is such as temperature TA3. The specific functions and processing of the control unit 104 are also referred to step S410.

[0146] The control unit 104 is further configured to control the two or more groups of electric heating components to be turned on if it is determined that the tube temperature of the indoor heat exchanger is less than or equal to the first turn-on temperature. Preferably, the two or more groups of electric heating components are controlled to be turned on in sequence according to the heating power from large to small at a set time interval; wherein, when the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the third electric heating component, the second electric heating component and the first electric heating component are controlled to be turned on in sequence according to the set time interval, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be turned on. The specific functions and processing of the control unit 104 are also shown in step S420.

[0147] The control unit 104 is further configured to control the first part of the electric heating components with large heating power in the two or more groups of electric heating components to be turned on if it is determined that the tube temperature of the indoor heat exchanger is greater than the first turn-on temperature and less than or equal to the second turn-on temperature. Preferably, the first part of the electric heating components with large heating power in the two or more groups of electric heating components are controlled to be turned on in sequence according to the order of heating power from large to small at a set time interval; wherein, in the case where the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the third electric heating component and the second electric heating component are controlled to be turned on in sequence according to the set time interval, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned on. The specific functions and processing of the control unit 104 can also be seen in step S430.

[0148] The control unit 104 is further configured to control the second part of the electric heating components with large heating power in the two or more groups of electric heating components to be turned on if it is determined that the tube temperature of the indoor heat exchanger is greater than the second turn-on temperature and less than or equal to the third turn-on temperature. Preferably, the second part of the electric heating components with large heating power in the two or more groups of electric heating components are controlled to be turned on in sequence according to the set time interval in descending order of heating power; the number of the second part of the electric heating components with large heating power is less than the number of the first part of the electric heating components with large heating power; wherein, in the case where the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the third electric heating component is controlled to be turned on, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned on. The specific functions and processing of the control unit 104 can also be found in step S440.

[0149] like Fig. 9 As shown, the control method of the operation mode of the electric auxiliary heating device of the heat pump air conditioner also includes: step 3, if the outdoor ambient temperature T 外环 ≤Temperature T k ℃(Temperature Tk The value range is 0℃~10℃, preferably 2℃), and the user sets the target temperature T 设 -Indoor ambient temperature T 内环 ≥Tc℃ (temperature Tc range is 1℃~5℃, preferably 3℃), turn on the electric auxiliary heating device according to the following conditions: judge the indoor heat exchanger tube temperature T 内管 The temperature range is based on the indoor heat exchanger tube temperature T 内管 The temperature range controls the opening of the first group of electric heating components, the second group of electric heating components and the third group of electric heating components, see step 31, step 32 and step 33 for details.

[0150] Step 31: If the indoor heat exchanger tube temperature T 内管 ≤ temperature TA1, turn on the third group of electric heating components, the second group of electric heating components and the first group of electric heating components at the same time, and then execute step 4.

[0151] Step 32: If the indoor heat exchanger tube temperature T 内管 ≤Temperature TA2, turn on the third and second groups of electric heating components at the same time.

[0152] Step 33: If the indoor heat exchanger tube temperature T 内管 ≤Temperature TA3, only the third group of electric heating components is turned on.

[0153] The values ​​of temperature TA1, temperature TA2, and temperature TA3 are associated with the wind speed of the indoor fan. For details, please refer to the example shown in Table 1.

[0154] In step 3, it can be seen from Table 1 that from the setting parameters, temperature TA1 < temperature TA2 < temperature TA3, when the indoor heat exchanger tube temperature T 内管 The lower the temperature, the higher the power of the electric auxiliary heating device that needs to be turned on (that is, the more groups of electric heating components); when the indoor heat exchanger tube temperature T 内管 When the temperature is high, only the electric heating components close to the refrigerant outlet (where the refrigerant temperature is low) are turned on, so that the air outlet temperature of the air conditioner is more uniform in terms of spatial distribution. For example, the refrigerant temperature at the refrigerant inlet is 70°C, and the refrigerant temperature at the refrigerant outlet is 40°C. From the air outlet temperature of the air conditioner, the air outlet temperature of the air conditioner is approximately: the air outlet temperature at the refrigerant inlet is 45°C, and the air outlet temperature at the refrigerant outlet is 35°C. After turning on the auxiliary electric heating of the electric heating component at the refrigerant outlet, the air outlet temperature of the refrigerant outlet is increased by about 5°C, so that the air outlet temperature at the refrigerant inlet and outlet is more uniform.

[0155] In some embodiments, the control unit 104 controls the two or more groups of electric heating components to be closed step by step according to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind speed of the indoor fan, or according to the pipe temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be fully or partially closed, including:

[0156] The control unit 104 is further configured to determine, according to the correspondence between the set wind speed and the set shut-down temperature threshold, the set shut-down temperature threshold corresponding to the set wind speed that is the same as the wind speed of the indoor fan in the correspondence as the first shut-down temperature threshold of the electric auxiliary heating device corresponding to the wind speed of the indoor fan; the set state of the electric auxiliary heating device is the first shut-down temperature threshold of the electric auxiliary heating device in the automatic operation state of the electric auxiliary heating device, which is less than the first shut-down temperature threshold of the electric auxiliary heating device in the case of the shut-down state of the electric auxiliary heating device; wherein the first shut-down temperature threshold of the electric auxiliary heating device includes: a first shut-down temperature, a second shut-down temperature, and a second shut-down temperature that decrease in sequence; the second shut-down temperature threshold of the electric auxiliary heating device includes: a first set temperature, a second set temperature, and a third set temperature that decrease in sequence; the first shut-down temperature is such as temperature TB1, the second shut-down temperature is such as temperature TB2, the third shut-down temperature is such as temperature TB3, the first set temperature is such as 2°C, the second set temperature is such as 1°C, and the third set temperature is such as 0°C. The specific functions and processing of the control unit 104 are also referred to step S510.

[0157] The control unit 104 is further configured to control the first part of the electric heating components with small heating power in the two or more groups of electric heating components to be turned off if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the first set temperature and greater than the second set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the third shut-off temperature and less than the second shut-off temperature, preferably, the first part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be turned off in sequence according to the order of heating power from small to large at a set time interval; wherein, in the case where the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the first electric heating component is controlled to be turned off, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned off. The specific functions and processing of the control unit 104 can also be seen in step S520.

[0158] The control unit 104 is further configured to control the second part of the electric heating components with small heating power in the two or more groups of electric heating components to be turned off if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the second set temperature and greater than the first set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the second shut-off temperature and less than the first shut-off temperature, preferably, the second part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be turned off in sequence according to the order of heating power from small to large at a set time interval; the number of the second part of the electric heating components with small heating power is greater than the number of the first part of the electric heating components with small heating power; wherein, in the case where the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the first electric heating component and the second electric heating component are controlled to be turned off in sequence according to the set time interval, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned off. The specific functions and processing of the control unit 104 can also be seen in step S530.

[0159] The control unit 104 is further configured to control the two or more groups of electric heating components to be turned off if it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the third set temperature, or if it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the first shut-off temperature, preferably, the two or more groups of electric heating components are controlled to be turned off in sequence according to the heating power from small to large at a set time interval; wherein, in the case where the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the first electric heating component, the second electric heating component and the third electric heating component are controlled to be turned off in sequence according to the set time interval, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be all turned off. The specific functions and processing of the control unit 104 can also be seen in step S540.

[0160] like Fig. 9 As shown, the control method of the operation mode of the electric auxiliary heating device of the heat pump air conditioner also includes: step 4, after the electric auxiliary heating device is turned on, the electric auxiliary heating device is turned off according to the following conditions, specifically referring to step 41, step 42 and step 43.

[0161] If the user sets the target temperature T 设 -Outdoor ambient temperature T 内环 ≤0℃ or indoor heat exchanger tube temperature T 内管 ≥Temperature TB1, turn off the first group of electric heating components, the second group of electric heating components and the third group of electric heating components at the same time.

[0162] If the user sets the target temperature T 设 -Outdoor ambient temperature T 内环≤1℃ or indoor heat exchanger tube temperature T 内管 ≥Temperature TB2, turn off the first and second groups of electric heating components at the same time.

[0163] If the user sets the target temperature T 设 -Outdoor ambient temperature T 内环 ≤2℃ or indoor heat exchanger tube temperature T 内管 ≥Temperature TB3, only the first group of electric heating components is turned off.

[0164] The values ​​of temperature TB1, temperature TB2, and temperature TB3 are associated with the wind speed of the indoor fan. For details, please refer to the example shown in Table 2.

[0165] In step 4, the same principle as step 3 and Table 1 is used. When the indoor heat exchanger tube temperature T 内管 Reach a certain temperature or outdoor ambient temperature T 内环 Close to the user set target temperature T 设 When the air conditioner is turned off, the electric heating component near the refrigerant inlet is turned off first, which reduces the auxiliary electric heating power of the electric auxiliary heating device and improves the uniformity of the air outlet temperature of the air conditioner, thereby improving the utilization efficiency of the electric auxiliary heating device.

[0166] In step 3 and step 4, preferably, when multiple groups of electric heating components are turned on and off, each group of electric heating components is operated at an interval of t (the value of t ranges from 1s to 5s, preferably 3s) to avoid controller abnormalities caused by sudden current changes.

[0167] Step 5: When the electric auxiliary heating device is turned on, it means that the electric auxiliary heating device needs to work for a longer time. Therefore, the indoor heat exchanger tube temperature T 内管 The temperature value for turning on the electric auxiliary heating device when it is lower than TA1, TA2 and TA3 is increased by 1°C, making it easier to turn on the electric auxiliary heating device; the indoor heat exchanger tube temperature T 内管 The temperature at which the electric auxiliary heating device is shut down is also increased by 1°C when it is higher than temperature TB1, temperature TB2, and temperature TB3, so that it is more difficult for the electric auxiliary heating device to shut down, and the electric auxiliary heating device can work longer and output more heat.

[0168] In step 5, when the setting state F of the auxiliary electric heating function of the electric auxiliary heating device is 设定 When the electric auxiliary heating device is in the on state, the control method is the same as the automatic state of the electric auxiliary heating device, wherein the preferred value of temperature Tk is 7°C, the preferred value of temperature Tc is 4°C, and the values ​​of temperature TA1, temperature TA2, temperature TA3, temperature TB1, temperature TB2, and temperature TB3 are +1°C on the basis of Table 1 and Table 2, making the electric heating easier to start and more difficult to exit, thereby increasing the use time of the auxiliary electric heating.

[0169] Step 6: When the auxiliary electric heating function of the electric auxiliary heating device is set to the state F 设定 When the electric auxiliary heating device is in the off state, the first group of electric heating components, the second group of electric heating components and the third group of electric heating components are not turned on.

[0170] In the scheme of the present invention, the opening and closing of each group of electric auxiliary heating is controlled by the indoor ambient temperature, the outdoor ambient temperature, and the indoor heat exchanger tube temperature. Specifically, it is based on a multi-stage electric heating to realize the step-by-step exit of the multi-stage electric heating components of the electric auxiliary heating device, thereby reducing the temperature difference before and after the electric auxiliary heating device exits work and improving comfort.

[0171] In the scheme of the present invention, a layout relationship between the arrangement of electric auxiliary heating devices and the refrigerant flow path of the indoor heat exchanger is proposed, that is, the power of the electric heating plates arranged on the refrigerant flow path of the indoor heat exchanger is from the refrigerant inlet to the refrigerant outlet, which is in line with the air-conditioning use environment (the flow path is from the inlet to the outlet, and the refrigerant temperature is from high to low), and group control is set; compared with the control scheme using pulse width modulation (PWM) and other control schemes for controlling the voltage duty cycle, the scheme of the present invention is simple to control, low in cost, and low in engineering implementation difficulty.

[0172] In the scheme of the present invention, a control strategy for an electric auxiliary device based on the layout relationship between the arrangement of the electric auxiliary heating device and the refrigerant flow path of the indoor heat exchanger is proposed. By judging the temperature of the indoor heat exchanger tube, it is determined whether the auxiliary heating is put into operation or not, and which group or multiple groups of electric heating components are put into operation for auxiliary electric heating. In terms of control, the electric heating plates of the low-temperature refrigerant section are put into operation first, and a specific control logic is given to realize the step-by-step exit of the multi-stage electric heating components of the electric auxiliary heating device to improve comfort.

[0173] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0174] According to an embodiment of the present invention, an air conditioner corresponding to the control device of the air conditioner is also provided. The air conditioner may include: the control device of the air conditioner described above.

[0175] Since the processing and functions implemented by the air conditioner of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned devices, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0176] According to an embodiment of the present invention, a computer program product corresponding to the air conditioner control method is also provided, including a computer program, which implements the steps of the air conditioner control method described above when executed by a processor.

[0177] Since the processing and functions implemented by the product of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0178] According to an embodiment of the present invention, a storage medium corresponding to an air conditioner control method is also provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the steps of the air conditioner control method described above.

[0179] Since the processing and functions implemented by the storage medium of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0180] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0181] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The indoor unit of the air conditioner has an indoor heat exchanger, an electric auxiliary heating device and an indoor fan; the indoor heat exchanger has one or more refrigerant pipes; the electric auxiliary heating device has two or more groups of electric heating components with different heating powers; for each of the one or more refrigerant pipes, the two or more groups of electric heating components with heating powers from small to large are arranged in sequence along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation; The air conditioner control method comprises: When the air conditioner is in heating operation, the outdoor environment temperature of the air conditioner is obtained, the indoor environment temperature of the air conditioner is obtained, the pipe temperature of the indoor heat exchanger is obtained, the set temperature of the air conditioner is obtained, the wind speed of the indoor fan is obtained, and the set state of the electric auxiliary heating device is obtained; wherein the set state of the electric auxiliary heating device includes any one of the following states: the automatic operation state of the electric auxiliary heating device, the on state of the electric auxiliary heating device, and the off state of the electric auxiliary heating device; If the setting state of the electric auxiliary heating device is the off state of the electric auxiliary heating device, the two or more groups of electric heating components are maintained or controlled to be turned off, so as to maintain or control the two or more groups of electric heating components in the electric auxiliary heating device to be all turned off; If the set state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device or the turned-on state of the electric auxiliary heating device, the two or more groups of electric heating components are controlled to act step by step in combination with at least one of the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the wind speed of the indoor fan, so as to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to act.

2. The air conditioner control method according to claim 1, characterized in that: The two or more electric heating components include: a first electric heating component, a second electric heating component and a third electric heating component; the first electric heating component, the second electric heating component and the third electric heating component are connected in parallel; in, In the first electric heating component, the second electric heating component and the third electric heating component, each group of electric heating components includes: two or more electric heating plates with the same heating power, and / or two or more electric heating plates with different heating powers; in each group of electric heating components, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, the two or more electric heating plates are arranged in sequence from small to large heating powers; and / or, For each of the more than one refrigerant pipes, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation, each refrigerant pipe has three parts: a front end, a middle part and an end part; the first electric heating component is arranged at the front end of each refrigerant pipe, the second electric heating component is arranged in the middle of each refrigerant pipe, and the third electric heating component is arranged at the end of each refrigerant pipe.

3. The air conditioner control method according to claim 1 or 2, characterized in that: In combination with the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the tube temperature of the indoor heat exchanger, the set temperature of the air conditioner, and at least one of the windshield of the indoor fan, the two or more groups of electric heating components are controlled to act step by step to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to act, including: When the two or more electric heating components in the electric auxiliary heating device are all turned off, determining whether the electric auxiliary heating device needs to be turned on according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner; If it is determined that the electric auxiliary heating device needs to be turned on, the two or more groups of electric heating components are controlled to be turned on step by step according to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be turned on in whole or in part; and / or, When the two or more electric heating components in the electric auxiliary heating device are all turned on, the two or more electric heating components are controlled to be turned off step by step according to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind speed of the indoor fan, or according to the pipe temperature of the indoor heat exchanger and the wind speed of the indoor fan, so as to control the two or more electric heating components in the electric auxiliary heating device to be completely or partially turned off.

4. The air conditioner control method according to claim 3, characterized in that: Determining whether to turn on the electric auxiliary heating device according to the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the set temperature of the air conditioner includes: Determine whether the outdoor ambient temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold, and whether the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is greater than or equal to a preset temperature difference threshold; If it is determined that the condition is not satisfied, it is determined that the electric auxiliary heating device does not need to be turned on; If it is determined that the conditions are met, it is determined that the electric auxiliary heating device needs to be turned on.

5. The air conditioner control method according to claim 3, characterized in that: According to the tube temperature of the indoor heat exchanger and the wind speed of the indoor fan, the two or more groups of electric heating components are controlled to be turned on step by step, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be turned on completely or partially, including: According to the correspondence between the set wind speed and the set opening temperature threshold, the set opening temperature threshold corresponding to the set wind speed that is the same as the wind speed of the indoor fan in the correspondence is determined as the opening temperature threshold of the electric auxiliary heating device corresponding to the wind speed of the indoor fan; the set state of the electric auxiliary heating device is the opening temperature threshold of the electric auxiliary heating device in the automatic operation state of the electric auxiliary heating device, which is less than the opening temperature threshold of the electric auxiliary heating device in the case of the opening state of the electric auxiliary heating device; wherein the opening temperature threshold of the electric auxiliary heating device includes: a first opening temperature, a second opening temperature, and a second opening temperature that increase in sequence; If it is determined that the tube temperature of the indoor heat exchanger is less than or equal to the first turn-on temperature, the two or more groups of electric heating components are controlled to be turned on; wherein, when the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the third electric heating component, the second electric heating component and the first electric heating component are controlled to be turned on in sequence at a set time interval, so as to control all the two or more groups of electric heating components in the electric auxiliary heating device to be turned on; If it is determined that the tube temperature of the indoor heat exchanger is greater than the first turn-on temperature and less than or equal to the second turn-on temperature, the first part of the electric heating components with large heating power in the two or more groups of electric heating components are controlled to be turned on; wherein, when the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the third electric heating component and the second electric heating component are controlled to be turned on in sequence at a set time interval, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned on; If it is determined that the tube temperature of the indoor heat exchanger is greater than the second turn-on temperature and less than or equal to the third turn-on temperature, the second part of the electric heating components with large heating power in the two or more groups of electric heating components are controlled to be turned on; the number of the second part of the electric heating components with large heating power is less than the number of the first part of the electric heating components with large heating power; wherein, in the case that the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the third electric heating component is controlled to be turned on, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned on.

6. The air conditioner control method according to claim 3, characterized in that: According to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind speed of the indoor fan, or according to the pipe temperature of the indoor heat exchanger and the wind speed of the indoor fan, the two or more groups of electric heating components are controlled to be closed step by step, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be fully or partially closed, including: According to the correspondence between the set wind speed and the set shut-down temperature threshold, the set shut-down temperature threshold corresponding to the set wind speed that is the same as the wind speed of the indoor fan in the correspondence is determined as the first shut-down temperature threshold of the electric auxiliary heating device corresponding to the wind speed of the indoor fan; the set state of the electric auxiliary heating device is the first shut-down temperature threshold of the electric auxiliary heating device in the automatic operation state of the electric auxiliary heating device, which is less than the first shut-down temperature threshold of the electric auxiliary heating device in the shut-down state of the electric auxiliary heating device; wherein the first shut-down temperature threshold of the electric auxiliary heating device includes: a first shut-down temperature, a second shut-down temperature, and a second shut-down temperature that decrease in sequence; the second shut-down temperature threshold of the electric auxiliary heating device includes: a first set temperature, a second set temperature, and a third set temperature that decrease in sequence; If it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the first set temperature and greater than the second set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the third shut-down temperature and less than the second shut-down temperature, then the first part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be turned off; wherein, in the case where the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the first electric heating component is controlled to be turned off, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned off; If it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the second set temperature and greater than the first set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the second shut-down temperature and less than the first shut-down temperature, then the second part of the electric heating components with small heating power in the two or more groups of electric heating components are controlled to be turned off; the number of the second part of the electric heating components with small heating power is greater than the number of the first part of the electric heating components with small heating power; wherein, in the case where the two or more groups of electric heating components include the first electric heating component, the second electric heating component and the third electric heating component, the first electric heating component and the second electric heating component are controlled to be turned off in sequence at a set time interval, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially turned off; If it is determined that the difference between the set temperature of the air conditioner and the indoor ambient temperature of the air conditioner is less than or equal to the third set temperature, or it is determined that the tube temperature of the indoor heat exchanger is greater than or equal to the first shutdown temperature, the two or more groups of electric heating components are controlled to be turned off; wherein, in the case that the two or more groups of electric heating components include a first electric heating component, a second electric heating component and a third electric heating component, the first electric heating component, the second electric heating component and the third electric heating component are controlled to be turned off in sequence at a set time interval, so as to control the two or more groups of electric heating components in the electric auxiliary heating device to be all turned off.

7. A control device for an air conditioner, characterized in that: The indoor unit of the air conditioner has an indoor heat exchanger, an electric auxiliary heating device and an indoor fan; the indoor heat exchanger has one or more refrigerant pipes; the electric auxiliary heating device has two or more groups of electric heating components with different heating powers; for each of the one or more refrigerant pipes, the two or more groups of electric heating components with heating powers from small to large are arranged in sequence along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe when the air conditioner is in heating operation; The control device of the air conditioner comprises: an acquisition unit, configured to, when the air conditioner is in heating operation, acquire an outdoor ambient temperature of the air conditioner, acquire an indoor ambient temperature of the air conditioner, acquire a pipe temperature of the indoor heat exchanger, acquire a set temperature of the air conditioner, acquire a wind speed of the indoor fan, and acquire a set state of the electric auxiliary heating device; the set state of the electric auxiliary heating device includes any of the following states: an automatic operation state of the electric auxiliary heating device, an on state of the electric auxiliary heating device, and an off state of the electric auxiliary heating device; a control unit configured to maintain or control the two or more groups of electric heating components to be turned off if the set state of the electric auxiliary heating device is the off state of the electric auxiliary heating device, so as to maintain or control the two or more groups of electric heating components in the electric auxiliary heating device to be all turned off; The control unit is further configured to control the two or more groups of electric heating components to act step by step in combination with at least one of the outdoor ambient temperature of the air conditioner, the indoor ambient temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the windshield of the indoor fan if the set state of the electric auxiliary heating device is the automatic operation state of the electric auxiliary heating device or the turned-on state of the electric auxiliary heating device, so as to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to act.

8. An air conditioner, characterized in that: include: The air conditioner control device as claimed in claim 7.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the air conditioner control method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the air conditioner control method according to any one of claims 1 to 6 are implemented.

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