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

Abstract

The application discloses an air conditioner and a control method, device, storage medium and computer program product thereof. The method comprises the following steps: for each refrigerant pipe in the indoor heat exchanger, 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 each refrigerant pipe during air conditioner heating operation; during air conditioner heating operation and in the automatic operation state or the open state of the electric auxiliary heating device, at least one of the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner and the wind stop of the indoor fan is combined to control the two or more groups of electric heating components to act step by step, so that all or part of the two or more groups of electric heating components in the electric auxiliary heating device act. According to the scheme, the heating power gradually changes when the electric auxiliary heating device is opened or closed, the temperature difference change before and after the electric auxiliary heating device exits the work is reduced, and the comfort is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, and particularly relates to a control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, in particular to a control method and device of an operation mode of an electric auxiliary heating device of a heat pump air conditioner, the heat pump air conditioner, a storage medium and a computer program product. BACKGROUND

[0002] When the air conditioner (such as a heat pump air conditioner) is heating in winter, the heating capacity will decrease with the decrease of the outdoor temperature, and the higher the outdoor temperature is, the higher the demand for the heating capacity of the air conditioner will be. In order to make up for the insufficient output of the air conditioner, an electric auxiliary heating device is usually used to assist in 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 environment temperature and the indoor heat exchanger pipe temperature, but in the process from turning on to turning off the electric auxiliary heating device, the outlet air temperature of the air conditioner decreases too much, which easily causes the user to feel uncomfortable.

[0003] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0004] The purpose of the present application is to provide a control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, so as to solve the problem that in related solutions, the switch of the electric auxiliary heating device of the air conditioner (such as a heat pump air conditioner) is controlled by the indoor environment temperature and the indoor heat exchanger pipe temperature, but in the process from turning on to turning off the electric auxiliary heating device, the outlet air temperature of the air conditioner decreases too much, which affects the user experience. The heating power gradually changes when the electric auxiliary heating device is turned on or off, the temperature difference change before and after the electric auxiliary heating device exits the work is reduced, and the comfort is improved.

[0005] The application provides a control method of an air conditioner, an indoor unit of the air conditioner, and a heating power control method of an electric auxiliary heating device of the air conditioner.

[0006] In some embodiments, the two or more electric heating assemblies include a first electric heating assembly, a second electric heating assembly, and a third electric heating assembly; the first electric heating assembly, the second electric heating assembly, and the third electric heating assembly are connected in parallel; wherein in the first electric heating assembly, the second electric heating assembly, and the third electric heating assembly, each electric heating assembly includes two or more electric heating pieces with the same heating power and / or two or more electric heating pieces with different heating powers; in each electric heating assembly, the two or more electric heating pieces with different heating powers are arranged in order from small to large along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe during the heating operation of the air conditioner; and / or for each refrigerant pipe, each refrigerant pipe has three parts, i.e., a front end, a middle part, and a tail end, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe during the heating operation of the air conditioner; the first electric heating assembly is arranged at the front end of each refrigerant pipe, the second electric heating assembly is arranged at the middle part of each refrigerant pipe, and the third electric heating assembly is arranged at the tail end of each refrigerant pipe.

[0007] In some embodiments, 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 according to at least one of the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, the tube temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the wind range of the indoor fan, including: in the case that all of the two or more groups of electric heating components in the electric auxiliary heating device are closed, determining whether the electric auxiliary heating device needs to be turned on according to the outdoor environment temperature of the air conditioner, the indoor environment 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, then controlling the two or more groups of electric heating components to act step by step according to the tube temperature of the indoor heat exchanger and the wind range of the indoor fan 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; and / or, in the case that all of the two or more groups of electric heating components in the electric auxiliary heating device are turned on, controlling the two or more groups of electric heating components to act step by step according to the set temperature of the air conditioner, the indoor environment temperature of the air conditioner, and the wind range of the indoor fan, or according to the tube temperature of the indoor heat exchanger and the wind range of the indoor fan to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to be turned off.

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

[0009] In some embodiments, according to the pipe temperature of the indoor heat exchanger and the air damper of the indoor fan, the two or more electric heating assemblies are controlled to be turned on step by step to control all or part of the two or more electric heating assemblies in the electric auxiliary heating device to be turned on, including: according to the corresponding relationship between the set air damper and the set opening temperature threshold, the set opening temperature threshold corresponding to the same set air damper as the air damper of the indoor fan in the corresponding relationship is determined as the opening temperature threshold of the electric auxiliary heating device corresponding to the air damper 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 open 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 that increase in turn; if it is determined that the pipe temperature of the indoor heat exchanger is less than or equal to the first opening temperature, all of the two or more electric heating assemblies are controlled to be turned on; wherein, in the case that the two or more electric heating assemblies include a first electric heating assembly, a second electric heating assembly, and a third electric heating assembly, the third electric heating assembly, the second electric heating assembly, and the first electric heating assembly are controlled to be turned on in turn at a set time interval to control all of the two or more electric heating assemblies in the electric auxiliary heating device to be turned on; if it is determined that the pipe temperature of the indoor heat exchanger is greater than the first opening temperature and less than or equal to the second opening temperature, a first part of electric heating assemblies with large heating power in the two or more electric heating assemblies are controlled to be turned on; wherein, in the case that the two or more electric heating assemblies include a first electric heating assembly, a second electric heating assembly, and a third electric heating assembly, the third electric heating assembly and the second electric heating assembly are controlled to be turned on in turn at a set time interval to control part of the two or more electric heating assemblies in the electric auxiliary heating device to be turned on; if it is determined that the pipe temperature of the indoor heat exchanger is greater than the second opening temperature and less than or equal to the third opening temperature, a second part of electric heating assemblies with large heating power in the two or more electric heating assemblies are controlled to be turned on; the number of the second part of electric heating assemblies with large heating power is less than the number of the first part of electric heating assemblies with large heating power; wherein, in the case that the two or more electric heating assemblies include a first electric heating assembly, a second electric heating assembly, and a third electric heating assembly, the third electric heating assembly is controlled to be turned on to control part of the two or more electric heating assemblies in the electric auxiliary heating device to be turned on.

[0010] In some embodiments, the two or more groups of electric heating components are controlled to be closed step by step according to the set temperature of the air conditioner, the indoor environment temperature of the air conditioner, and the air damper of the indoor fan, or according to the tube temperature of the indoor heat exchanger and the air damper of the indoor fan, to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to be closed, including: according to the corresponding relationship between the set air damper and the set closing temperature threshold, the set closing temperature threshold corresponding to the same set air damper as the air damper of the indoor fan in the corresponding relationship is determined as the first closing temperature threshold of the electric auxiliary heating device corresponding to the air damper of the indoor fan; the set state of the electric auxiliary heating device is the first closing 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 closing temperature threshold of the electric auxiliary heating device in the closed state of the electric auxiliary heating device; wherein the first closing temperature threshold of the electric auxiliary heating device includes: a first closing temperature, a second closing temperature, and a second closing temperature that decrease in turn; the second closing 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 turn; if it is determined that the difference between the set temperature of the air conditioner and the indoor environment temperature of the air conditioner is less than or equal to the first set temperature and greater than the second set temperature, or that the tube temperature of the indoor heat exchanger is greater than or equal to the third closing temperature and less than the second closing temperature, then the first part of electric heating components with small heating power in the two or more groups of electric heating components are controlled to be closed; 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 closed to control the two or more groups of electric heating components in the electric auxiliary heating device to be partially closed; if it is determined that the difference between the set temperature of the air conditioner and the indoor environment temperature of the air conditioner is less than or equal to the second set temperature and greater than the first set temperature, or that the tube temperature of the indoor heat exchanger is greater than or equal to the second closing temperature and less than the first closing temperature, then the second part of electric heating components with small heating power in the two or more groups of electric heating components are controlled to be closed; 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 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 and the second electric heating component are controlled to be closed in turn 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 closed; if it is determined that the difference between the set temperature of the air conditioner and the indoor environment temperature of the air conditioner is less than or equal to the third set temperature, or that the tube temperature of the indoor heat exchanger is greater than or equal to the first closing temperature, then the two or more groups of electric heating components are controlled to be closed;In a case where the two or more electric heating assemblies include a first electric heating assembly, a second electric heating assembly, and a third electric heating assembly, the first electric heating assembly, the second electric heating assembly, and the third electric heating assembly are controlled to be sequentially turned off at a set time interval, so as to control all of the two or more electric heating assemblies in the electric auxiliary heating device to be turned off.

[0011] In order to solve the above problems, the present application provides a control device of an air conditioner, an indoor unit of the air conditioner, and a control method of the air conditioner. 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 electric heating assemblies with different heating powers. For each of the one or more refrigerant pipes, the two or more electric heating assemblies with the heating powers arranged from small to large are sequentially arranged along a direction from a refrigerant inlet to a refrigerant outlet of each refrigerant pipe during a heating operation of the air conditioner. The control device of the air conditioner includes: an acquisition unit configured to acquire an outdoor environment temperature of the air conditioner, an indoor environment temperature of the air conditioner, a pipe temperature of the indoor heat exchanger, a set temperature of the air conditioner, a wind level of the indoor fan, and a set state of the electric auxiliary heating device when the air conditioner is in the heating operation. The set state of the electric auxiliary heating device includes any one of 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 is configured to maintain or control all of the two or more electric heating assemblies to be turned off to maintain or control all of the two or more electric heating assemblies in the electric auxiliary heating device to be turned off if the set state of the electric auxiliary heating device is the off state of the electric auxiliary heating device. The control unit is further configured to control the two or more electric heating assemblies to act step by step to control all or part of the two or more electric heating assemblies in the electric auxiliary heating device to act in combination with at least one of the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the wind level 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.

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

[0013] In some embodiments, the control unit controls the two or more groups of electric heating assemblies 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 tube temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the wind range of the indoor fan, to control all or part of the two or more groups of electric heating assemblies in the electric auxiliary heating device to act, including: in the case that all of the two or more groups of electric heating assemblies in the electric auxiliary heating device are closed, 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, controlling the two or more groups of electric heating assemblies to act step by step according to the tube temperature of the indoor heat exchanger and the wind range of the indoor fan, to control all or part of the two or more groups of electric heating assemblies in the electric auxiliary heating device to act; and / or in the case that all of the two or more groups of electric heating assemblies in the electric auxiliary heating device are open, controlling the two or more groups of electric heating assemblies to close step by step according to the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the wind range of the indoor fan, or according to the tube temperature of the indoor heat exchanger and the wind range of the indoor fan, to control all or part of the two or more groups of electric heating assemblies in the electric auxiliary heating device to close.

[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 value and a 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 value are satisfied; if it is determined that the conditions are 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 satisfied, it is determined 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 air damper 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 be turned on, including: determining the set opening temperature threshold corresponding to the same set air damper in the corresponding relationship between the set air damper and the set opening temperature threshold as the opening temperature threshold of the electric auxiliary heating device corresponding to the air damper of the indoor fan according to the corresponding relationship; 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 opening state; wherein the opening temperature threshold of the electric auxiliary heating device includes: the first opening temperature, the second opening temperature, and the second opening temperature in turn increasing; 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 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, the second electric heating component and the first electric heating component are controlled to be turned on in turn at a set time interval, so as 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 opening temperature and less than or equal to the second opening temperature, the first part of 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 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 turn at a set time interval, so as to control part 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 second opening temperature and less than or equal to the third opening temperature, the second part of 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 electric heating components with large heating power is less than the number of the first part of 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 part of the two or more groups of electric heating components in the electric auxiliary heating device to be turned on.

[0016] In some embodiments, the control unit controls the two or more groups of electric heating components to be turned off step by step according to the set temperature of the air conditioner, the indoor environment temperature of the air conditioner, and the wind damper of the indoor fan, or according to the tube temperature of the indoor heat exchanger and the wind damper of the indoor fan, to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to be turned off, including: determining the set closing temperature threshold corresponding to the same set wind damper in the corresponding relationship between the set wind damper and the set closing temperature threshold as the first closing temperature threshold of the electric auxiliary heating device corresponding to the wind damper of the indoor fan according to the corresponding relationship; the set state of the electric auxiliary heating device is the first closing 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 closing temperature threshold of the electric auxiliary heating device in the closed state of the electric auxiliary heating device; wherein the first closing temperature threshold of the electric auxiliary heating device includes: the first closing temperature, the second closing temperature, and the second closing temperature which are sequentially reduced; the second closing temperature threshold of the electric auxiliary heating device includes: the first set temperature, the second set temperature, and the third set temperature which are sequentially reduced; if it is determined that the difference between the set temperature of the air conditioner and the indoor environment temperature of the air conditioner is less than or equal to the first set temperature and greater than the second set temperature, or that the tube temperature of the indoor heat exchanger is greater than or equal to the third closing temperature and less than the second closing temperature, then the first part of 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 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 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 environment temperature of the air conditioner is less than or equal to the second set temperature and greater than the first set temperature, or that the tube temperature of the indoor heat exchanger is greater than or equal to the second closing temperature and less than the first closing temperature, then the second part of 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 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 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 and the second electric heating component are controlled to be turned off in 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 environment temperature of the air conditioner is less than or equal to the third set temperature, or that the tube temperature of the indoor heat exchanger is greater than or equal to the first closing temperature, then the two or more groups of electric heating components are controlled to be turned off.In the case where the two or more electric heating assemblies include a first electric heating assembly, a second electric heating assembly and a third electric heating assembly, the first electric heating assembly, the second electric heating assembly and the third electric heating assembly are controlled to be closed in turn at a set time interval, so as to control all the two or more electric heating assemblies in the electric auxiliary heating device to be closed.

[0017] In order to match the above device, the application further provides an air conditioner, which comprises the above control device of the air conditioner.

[0018] In order to match the above method, the application further provides a storage medium, which comprises a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the steps of the above control method of the air conditioner.

[0019] In order to match the above method, the application further provides a computer program product, which comprises a computer program, and when the computer program is executed by a processor, the steps of the above control method of the air conditioner are realized.

[0020] Therefore, by the scheme of the application, for one or more refrigerant pipes in the indoor heat exchanger of the air conditioner, an electric auxiliary heating device composed of two or more electric heating assemblies is arranged, the heating powers of the two or more electric heating assemblies are different, for each of the one or more refrigerant pipes, the two or more electric heating assemblies with the heating powers from small to large are arranged in turn along the direction from the refrigerant inlet to the refrigerant outlet of the refrigerant pipe during heating of the air conditioner, and in the case of heating operation of the air conditioner, according to the outdoor environment temperature, the indoor environment temperature, the set temperature, the indoor heat exchanger pipe temperature and the wind scale of the indoor fan, the two or more electric heating assemblies are controlled to be opened or closed step by step, so that the heating power of the electric auxiliary heating device changes step by step (for example, changes in a step-by-step manner) when the electric auxiliary heating device is opened or closed, and the air outlet temperature of the air conditioner is homogenized, so that the air outlet temperature of the air conditioner is homogenized by making the heating power of the electric auxiliary heating device change step by step when the electric auxiliary heating device is opened or closed, the temperature difference change before and after the electric auxiliary heating device is turned off is reduced, and the comfort is improved.

[0021] Other features and advantages of the application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application.

[0022] The technical scheme of the application will be further described in detail below with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Flowchart of an embodiment of the control method of the air conditioner of the application;

[0024] Figure 2Flow chart of an embodiment of the method of the present application for controlling all or part of the operation of the two or more electric heating components in the electric auxiliary heating device;

[0025] Figure 3 Flow chart of an embodiment of the method of the present application for determining whether the electric auxiliary heating device needs to be turned on;

[0026] Figure 4 Flow chart of an embodiment of the method of the present application for controlling all or part of the turning on of the two or more electric heating components in the electric auxiliary heating device;

[0027] Figure 5 Flow chart of an embodiment of the method of the present application for controlling all or part of the turning off of the two or more electric heating components in the electric auxiliary heating device;

[0028] Figure 6 Structure diagram of an embodiment of the control device of the air conditioner of the present application;

[0029] Figure 7 Flow arrangement diagram of the refrigerant flow path of the electric heating sheet and the indoor heat exchanger;

[0030] Figure 8 Flow arrangement diagram of the refrigerant flow path of the indoor heat exchanger;

[0031] Figure 9 Flow chart of an embodiment of the control method of the electric auxiliary heating device operation mode of the heat pump air conditioner.

[0032] In combination with the drawings, the reference signs in the embodiments of the present application are as follows:

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

[0034] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present application.

[0035] In related solutions, an air conditioning product usually uses an electric auxiliary heating device such as a positive temperature coefficient (PTC) electric heating pipe, and the switch of the electric auxiliary heating device is controlled by the indoor ambient temperature and the indoor heat exchanger pipe temperature, and the control is relatively simple. However, due to the high electric heating power of the PTC electric heating pipe, the electric heating power of a 3-match air conditioner is usually 1500W-2500W. During the process of turning off the PTC electric heating pipe, the air conditioning heating output suddenly decreases, the outlet air temperature decreases by 5-10℃, and the user is prone to feel uncomfortable. Specifically, the air conditioning heating output = electric auxiliary heating device heat + air conditioning heating capacity, and the air conditioning heating capacity can be regarded as unchanged before and after the PTC electric heating pipe is turned on and off. The total heating output decreases by 1500W-2500W suddenly before and after the PTC electric heating pipe is turned on and off, and the temperature decreases relatively obviously.

[0036] There are also methods for controlling the output of the PTC electric heating pipe by adjusting different duty cycles, but the cost of the controller is high, and the PTC electric heating pipe is frequently in high-frequency operation, and the reliability is greatly reduced.

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

[0038] It is considered that in related solutions, the PTC electric heating pipe of the electric auxiliary heating device of the air conditioner usually uses a single-pipe or double-pipe structure, but the control generally only uses on-off control, the control is simple, and the temperature difference before and after the electric auxiliary heating device is turned on and off is large, which affects the comfort. The single-pipe or double-pipe structure refers to the number of PTC electric heating pipes. For example, when the electric heating power of the electric auxiliary heating device is 2000W, if it is a double-pipe structure, then it is composed of two electric heating pipes with a total power of 2000W. Therefore, it is necessary to design an electric auxiliary heating device with multiple electric heating components, and to realize the step-by-step withdrawal of the multiple electric heating components of the electric auxiliary heating device by optimizing the control logic, so as to improve the comfort.

[0039] Therefore, the scheme of the present application provides a control method of an air conditioner, in particular, a control method of an electric auxiliary heating device operating mode of a heat pump air conditioner, arranges the flow arrangement of the PTC electric heating pipe and the refrigerant flow path of the indoor heat exchanger in the electric auxiliary heating device, and controls the output power of the auxiliary electric heating of the electric auxiliary heating device, thereby improving the comfort.

[0040] According to an embodiment of the present application, a control method of an air conditioner is provided, which comprises the following steps: Figure 1The flowchart shows an embodiment of the method of the application. 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 than one refrigerant pipe. When the number of the one or more than one refrigerant pipe is two or more, 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 to say, 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 refrigerant pipe (such as refrigerant pipe 10) in the one or more than one refrigerant pipe, the two or more groups of electric heating components with the heating power from small to large are arranged in order along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe during the heating operation of the air conditioner. Each group of electric heating components includes two or more electric heating fins (such as electric heating fin 20). The electric heating fin 20 can be a PTC electric heating fin. In the scheme of the application, as shown in the figure, the control method of the air conditioner includes steps S110 to S130. Figure 1

[0041] At step S110, in the case of the heating operation of the air conditioner, 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 stop 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 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. The outdoor environment temperature of the air conditioner is the outdoor environment temperature T 外环 , the indoor environment temperature of the air conditioner is the indoor environment temperature T 内环 , the pipe temperature of the indoor heat exchanger is the indoor heat exchanger pipe temperature T 内管 , the set temperature of the air conditioner is the user set target temperature T 设 , and the set state of the electric auxiliary heating device is the set state F 设定 of the auxiliary electric heating function of the electric auxiliary heating device.

[0042] At step S120, 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 off to maintain or control all the two or more groups of electric heating components in the electric auxiliary heating device to be off.

[0043] ​At step S130, 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 electric heating assemblies are controlled to act step by step in combination with at least one of the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the wind stop of the indoor fan, so as to control all or part of the two or more electric heating assemblies in the electric auxiliary heating device to act. Specifically, in the case that all of the two or more electric heating assemblies are closed, the two or more electric heating assemblies are controlled to open step by step, so as to control all or part of the two or more electric heating assemblies in the electric auxiliary heating device to open. Specifically, in the case that all of the two or more electric heating assemblies are opened, the two or more electric heating assemblies are controlled to open step by step, so as to control all or part of the two or more electric heating assemblies in the electric auxiliary heating device to open.

[0044] The scheme of the present application provides a layout scheme of a PTC electric heating pipe and a control scheme of an electric auxiliary heating device for auxiliary electric heating output. The flow arrangement of the PTC electric heating pipe and the refrigerant flow path of the indoor heat exchanger in the electric auxiliary heating device is arranged, the output power of the electric auxiliary heating device is controlled according to the current load, and the comfort is improved.

[0045] In some embodiments, the two or more electric heating assemblies include a first electric heating assembly, a second electric heating assembly, and a third electric heating assembly; and the first electric heating assembly, the second electric heating assembly, and the third electric heating assembly are connected in parallel.

[0046] Figure 7 The flow arrangement relationship between the electric heating sheet and the refrigerant flow path of the indoor heat exchanger is shown in the figure. Figure 7As shown, the indoor heat exchanger has two or more refrigerant tubes (such as refrigerant tube 10), each of which has a refrigerant inlet (such as refrigerant inlet 11) and a refrigerant outlet (such as refrigerant outlet 12). The two or more refrigerant tubes are connected in parallel, specifically, the refrigerant inlets of all the two or more refrigerant tubes are connected together, and the refrigerant outlets are connected together. For example, in the case where the two or more refrigerant tubes specifically include three refrigerant tubes, in the electric auxiliary heating device of the air conditioner, three groups of electric heating assemblies are provided for the three refrigerant tubes. Each group of electric heating assemblies includes two or more electric heating fins, and in each group of electric heating assemblies, the arrangement of the two or more electric heating fins is associated with the refrigerant flow direction when the indoor heat exchanger is heating. Specifically, in each group of electric heating assemblies, the arrangement direction of the two or more electric heating fins is arranged in the direction of the refrigerant temperature from high to low in the corresponding refrigerant tube, and in the direction of the refrigerant temperature from low to high in the refrigerant tube, the power of the two or more electric heating fins is from low to high. That is, from the refrigerant inlet to the refrigerant outlet when the refrigerant tube is heating, the power of the two or more electric heating fins gradually increases, that is, the power of the electric heating fin at the refrigerant inlet when the refrigerant tube is heating is small, and the power of the electric heating fin at the refrigerant outlet when the refrigerant tube is heating is slightly larger, showing a stepped shape.

[0047] In the scheme of the present application, the three groups of electric heating assemblies are specifically: the first group of electric heating assemblies, the second group of electric heating assemblies, and the third group of electric heating assemblies. The first group of electric heating assemblies, the second group of electric heating assemblies, and the third group of electric heating assemblies are connected in parallel. In the scheme of the present application, the three groups of electric heating assemblies are connected in parallel, and the three groups of electric heating assemblies are controlled by a single control circuit. Figure 7 In the example shown, the three groups of electric heating assemblies share a zero line, and the fire line ends are controlled separately, so that the working state of each group of electric heating assemblies can be controlled separately. Each fire line has a relay switch, which can control whether a certain group of electric heating assemblies is powered on or not.

[0048] The first group of electric heating assemblies is a series connection of electric heating fins at the front end of each flow path process, and the power thereof accounts for about A% of the total power (A has a value range of 20-40, and is preferably 25). The second group of heating fins is a series connection of heating fins at the middle position of each flow path process, and the power thereof accounts for about B% of the total power (B has a value range of 20-40, and is preferably 30). The third group of heating fins is a series connection of heating fins at the end of each flow path process, and the power thereof accounts for about C% of the total power (C has a value range of 30-50, and is preferably 45).

[0049] In the scheme of the present application, the number of electric heating assemblies in the electric auxiliary heating device can be set according to actual needs. The preferred scheme is three groups, which can balance the effect and cost, because if the number of electric heating assemblies is small, the stepped control effect will be poor, and if the number of electric heating assemblies is large, the number of control lines that need to be controlled separately will increase, resulting in an increase in control cost.

[0050] In some embodiments, in the first electric heating assembly, the second electric heating assembly and the third electric heating assembly, each electric heating assembly comprises two or more electric heating pieces with the same heating power and / or two or more electric heating pieces with different heating powers; and in each electric heating assembly, the two or more electric heating pieces with different heating powers are arranged in order from small to large along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe during heating operation of the air conditioner.

[0051] Figure 7 The numbers on the middle electric heating pieces represent different groups of electric heating pieces, 1, 2 and 3 represent the group number, and the number 1 represents the electric heating piece in the first electric heating assembly, the number 2 represents the electric heating piece in the second electric heating assembly, and the number 3 represents the electric heating piece in the third electric heating assembly. The arrangement relationship between the electric heating pieces and the flow path is shown in FIG. 2. Figure 7 Figure 7 In the example shown in FIG. 2, the electric heating pieces arranged at each refrigerant pipe are marked as 1, 2 and 3. For example, along the direction from the refrigerant inlet to the refrigerant outlet of the first refrigerant pipe during heating, the electric heating pieces 1, the electric heating pieces 1, the electric heating pieces 2, the electric heating pieces 2, the electric heating pieces 3, the electric heating pieces 3 and the electric heating pieces 3 are arranged in order and connected in series. Along the direction from the refrigerant inlet to the refrigerant outlet of the second refrigerant pipe during heating, the electric heating pieces 1, the electric heating pieces 1, the electric heating pieces 2, the electric heating pieces 2, the electric heating pieces 2, the electric heating pieces 3, the electric heating pieces 3 and the electric heating pieces 3 are arranged in order and connected in series. Along the direction from the refrigerant inlet to the refrigerant outlet of the third refrigerant pipe during heating, the electric heating pieces 1, the electric heating pieces 1, the electric heating pieces 2, the electric heating pieces 2, the electric heating pieces 2, the electric heating pieces 3, the electric heating pieces 3 and the electric heating pieces 3 are arranged in order and connected in series.

[0052] The number of electric heating pieces in each electric heating assembly and the power of each electric heating piece can be different. The power of each electric heating piece can be different, and generally, several electric heating pieces with different powers are arranged in combination in the same electric heating assembly. Generally, the total power of each group is distributed on A%, B% and C%, and the power of the electric heating pieces arranged at the position with high power is generally higher.

[0053] In the scheme of the present application, the electric heating pieces are arranged and matched with the heat distribution on the refrigerant flow path based on the arrangement relationship between the electric auxiliary heating device and the refrigerant flow path of the indoor heat exchanger, and the electric auxiliary heating device is turned on and off in a stepwise manner, thereby solving the problem of large temperature difference before and after the electric auxiliary heating device is turned on and off in the related scheme, and improving the user comfort.

[0054] ​In some embodiments, for each of the one or more refrigerant tubes, each refrigerant tube has a front end, a middle and a tail end along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant tube during the heating operation of the air conditioner; the first electric heating assembly is arranged at the front end of each refrigerant tube, the second electric heating assembly is arranged at the middle of each refrigerant tube, and the third electric heating assembly is arranged at the tail end of each refrigerant tube.

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

[0056] In the scheme of the present application, a multi-stage electric heating assembly based on the layout relationship between the electric auxiliary heating device row 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 row and the refrigerant flow path of the indoor heat exchanger is proposed. The multi-stage electric heating assembly of the electric auxiliary heating device is gradually withdrawn from work, the temperature difference change before and after the electric auxiliary heating device is withdrawn from work is reduced, and the comfort is improved.

[0057] In some embodiments, in step S130, at least one of the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the wind stop of the indoor fan is combined to control the two or more electric heating assemblies to act step by step, so as to control all or part of the two or more electric heating assemblies in the electric auxiliary heating device to act, including: controlling the process of turning on the electric auxiliary heating device, and / or controlling the process of turning off the electric auxiliary heating device.

[0058] The following will be further described with reference to Figure 2 The flow chart of an embodiment of the process of controlling all or part of the two or more electric heating assemblies in the electric auxiliary heating device in the method of the present application is shown in the figure, which further illustrates the specific process of controlling all or part of the two or more electric heating assemblies in the electric auxiliary heating device in step S130, including: the process of turning on the electric auxiliary heating device shown in steps S210 to S220, and / or the process of turning off the electric auxiliary heating device shown in step S230. Wherein, the process of turning on the electric auxiliary heating device is as follows:

[0059] Step S210, in the case that 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, and in the case that all of the two or more groups of electric heating assemblies in the electric auxiliary heating device are closed, i.e. in the case that all of the two or more groups of electric heating assemblies are closed, it is determined whether the electric auxiliary heating device needs to be opened according to the outdoor environment temperature of the air conditioner, the indoor environment 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 opened, then the two or more groups of electric heating assemblies are controlled to be opened step by step according to the pipe temperature of the indoor heat exchanger and the air damper of the indoor fan, so as to control all or part of the two or more groups of electric heating assemblies in the electric auxiliary heating device to be opened; of course, if it is determined that the electric auxiliary heating device does not need to be opened, then the electric auxiliary heating device is controlled to be closed or the electric auxiliary heating device is kept closed.

[0061] In the scheme of the present application, the lower the indoor environment temperature, the outdoor environment temperature, the pipe temperature of the indoor heat exchanger, etc., the more the number of the opened electric heating assemblies, and at the same time, the electric heating assemblies close to the end of the flow are preferentially opened (i.e. the third group of electric heating assemblies), the second group of electric heating assemblies are secondly opened, and the first group of electric heating assemblies are lastly opened, so that the auxiliary electric heating step of the electric auxiliary heating device is put into use, the temperature fluctuation is effectively reduced, and the comfort is improved.

[0062] In some embodiments, in combination with at least one of the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the air damper of the indoor fan, the two or more groups of electric heating assemblies are controlled to act step by step, so as to control all or part of the two or more groups of electric heating assemblies in the electric auxiliary heating device to act, and the process of controlling the electric auxiliary heating device to be opened comprises the following steps:

[0063] Step S230, in the case that 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, and in the case that all of the two or more groups of electric heating assemblies in the electric auxiliary heating device are opened, i.e. in the case that all of the two or more groups of electric heating assemblies are opened, it is determined whether the electric auxiliary heating device needs to be opened according to the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, and the set temperature of the air conditioner, and the process of controlling the electric auxiliary heating device to be opened comprises the following steps:

[0064] In the scheme of the present application, when the temperature of indoor environment temperature, outdoor environment temperature, indoor heat exchanger tube temperature and the like reaches the target value, the first group of electric heating components is closed first, the second group of electric heating components is closed second, and the third group of electric heating components is closed last. By sequentially closing the electric heating components of different groups under different conditions, the auxiliary electric heating ladder of the electric auxiliary heating device is withdrawn from use, temperature fluctuation is effectively reduced, and comfort is improved.

[0065] In the scheme of the present application, when the electric auxiliary heating device is controlled, the opening and closing of each group of electric heating components in the electric auxiliary heating device are controlled by indoor environment temperature, outdoor environment temperature, and indoor heat exchanger tube temperature. When the temperature of indoor environment temperature, outdoor environment temperature, indoor heat exchanger tube temperature and the like is lower, the number of opened electric heating components is more, and the electric heating components close to the end of the process (i.e., the third group of electric heating components) are opened first, the second group of electric heating components are opened second, and the first group of electric heating components are opened last. When the temperature of indoor environment temperature, outdoor environment temperature, indoor heat exchanger tube temperature and the like reaches the target value, the first group of electric heating components is closed first, the second group of electric heating components is closed second, and the third group of electric heating components is closed last. Of course, for different groups of electric heating components, the whole group is opened or closed. In this way, by sequentially opening and closing the electric heating components of different groups under different conditions, the auxiliary electric heating ladder of the electric auxiliary heating device is put into and withdrawn from use, temperature fluctuation is effectively reduced, and comfort is improved.

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

[0067] The specific process of determining whether the electric auxiliary heating device needs to be turned on in step S210 is further described below with reference to the flowchart of an embodiment of the method of the present application shown in Figure 3

[0068] In step S310, it is determined whether the outdoor environment temperature of the air conditioner is less than or equal to a preset outdoor temperature threshold value, and the difference between the set temperature of the air conditioner and the indoor environment temperature of the air conditioner is greater than or equal to a preset temperature difference threshold value. The preset outdoor temperature threshold value is, for example, temperature T k ℃, and the preset temperature difference threshold value is, for example, Tc℃.

[0069] In step S320, if it is determined that the conditions are not met, it is determined that the electric auxiliary heating device does not need to be turned on.

[0070] In 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] Figure 9 Flowchart of an embodiment of the control method for the electric auxiliary heating device operation mode of the heat pump air conditioner. As shown in Figure 9 the control method for the electric auxiliary heating device operation mode of the heat pump air conditioner includes:

[0072] Step 1, in the case of air conditioning heating operation, detecting the indoor environment temperature T 内环 , the outdoor environment temperature T 外环 , the indoor heat exchanger tube temperature T 内管 , the set state F 设定 of the auxiliary electric heating function of the electric auxiliary heating device, the user set target temperature T 设 , and then executing step 2 or step 5 or step 6. The set state F 设定 of the auxiliary electric heating function of the electric auxiliary heating device has three states of electric auxiliary heating device on, electric auxiliary heating device off, and electric auxiliary heating device automatic.

[0073] Step 2, when the set state F 设定 of the auxiliary electric heating function of the electric auxiliary heating device is the electric auxiliary heating device automatic state, it is judged whether the outdoor environment temperature T 外环 ≤ temperature T k ℃, and the user set target temperature T 设 - indoor environment temperature T 内环 ≥ temperature Tc℃: if yes, step 3 is executed to control the three groups of electric heating components to be turned on step by step, otherwise the current control of the electric auxiliary heating device is ended.

[0074] In the scheme of the present application, according to the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, and the set temperature of the air conditioner, it is determined whether the electric auxiliary heating device needs to be turned on, so as to control or keep the electric auxiliary heating device off to save energy in the case of determining that the electric auxiliary heating device does not need to be turned on, and to execute the opening strategy of the electric auxiliary heating device in the case of determining that the electric auxiliary heating device needs to be turned on, so as to improve the user experience.

[0075] In some embodiments, in step S220, according to the tube temperature of the indoor heat exchanger and the air damper 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 specific process of turning on all or part of the two or more groups of electric heating components in the electric auxiliary heating device. See the following exemplary description.

[0076] The following will be described in combination with Figure 4An embodiment flowchart 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 application is shown, which further illustrates 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] In step S410, according to the corresponding relationship between the set air volume and the set turning-on temperature threshold, the set turning-on temperature threshold corresponding to the set air volume same as the air volume of the indoor fan in the corresponding relationship is determined as the turning-on temperature threshold of the electric auxiliary heating device corresponding to the air volume of the indoor fan; the set state of the electric auxiliary heating device is the turning-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 turning-on temperature threshold of the electric auxiliary heating device in the turning-on state of the electric auxiliary heating device; wherein the turning-on temperature threshold of the electric auxiliary heating device includes a first turning-on temperature, a second turning-on temperature, and a third turning-on temperature in turn increasing; the first turning-on temperature is, for example, temperature TA1, the second turning-on temperature is, for example, temperature TA2, and the third turning-on temperature is, for example, temperature TA3.

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

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

[0080] Step S440, if it is determined that the tube temperature of the indoor heat exchanger is greater than the second opening temperature and less than or equal to the third opening 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 opened, 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 opened in the order of large to small heating power at a 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 opened to control the two or more groups of electric heating components in the electric auxiliary heating device part to be partially opened.

[0081] As shown in Figure 9 , the control method of the electric auxiliary heating device operation mode of the heat pump air conditioner further comprises: step 3, if the outdoor environment 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 - the indoor environment temperature T 内环 ≥ temperature Tc℃ (temperature Tc, the value range is 1℃-5℃, preferably 3℃), the electric auxiliary heating device is opened according to the following conditions: judging the indoor heat exchanger tube temperature T 内管 belongs to the temperature interval, controlling 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 according to the temperature interval to which the indoor heat exchanger tube temperature T 内管 belongs, for details, see steps 31, 32 and 33.

[0082] Step 31, if the indoor heat exchanger tube temperature T 内管 ≤ temperature TA1, the third group of electric heating components, the second group of electric heating components and the first group of electric heating components are opened at the same time, and then step 4 is executed.

[0083] Step 32, if the indoor heat exchanger tube temperature T 内管 ≤ temperature TA2, the third group of electric heating components and the second group of electric heating components are opened 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 opened.

[0085] Wherein, the values of temperature TA1, temperature TA2 and temperature TA3 are associated with the air outlet of the indoor fan, for details, see the example shown in Table 1.

[0086] Table 1

[0087] Windshield TA1 (unit: °C) TA2 (unit: °C) TA3 (unit: °C) Super-strong windshield 42 46 50 High windshield 42 45 48 Medium windshield 40 43 46 Low windshield 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 is lower, it means that the power of the electric auxiliary heating device to be started is higher (i.e. the number of electric heating assemblies is more); when the indoor heat exchanger tube temperature T 内管 is higher, only the electric heating assembly close to the refrigerant outlet (the refrigerant temperature is low) is started, so from the spatial distribution, the air outlet temperature of the air conditioner is more uniform. For example: the refrigerant temperature at the refrigerant inlet is 70℃, and the refrigerant temperature at the refrigerant outlet is 40℃, from the air outlet temperature of the air conditioner, the air outlet temperature of the air conditioner is about: the air outlet temperature at the refrigerant inlet is 45℃, and the air outlet temperature at the refrigerant outlet is 35℃, after the auxiliary electric heating of the electric heating assembly at the refrigerant outlet is started, the air outlet temperature at the refrigerant outlet is about 5℃ higher, so the air outlet temperature at the refrigerant inlet and outlet positions is more uniform.

[0089] In some embodiments, in step S230, according to the set temperature of the air conditioner, the indoor environment temperature of the air conditioner, and the air damper of the indoor fan, or according to the tube temperature of the indoor heat exchanger and the air damper of the indoor fan, the two or more electric heating assemblies are controlled to be closed step by step, to control the specific process of the two or more electric heating assemblies in the electric auxiliary heating device being completely or partially closed, see the following exemplary description.

[0090] The following will be further described with reference to the flowchart of an embodiment of the method of the present application shown in Figure 5 FIG. 6, which further illustrates the specific process of step S230 of controlling the two or more electric heating assemblies in the electric auxiliary heating device to be completely or partially closed, including steps S510 to S540.

[0091] Step S510, according to the corresponding relationship between the set wind and the set closing temperature threshold, the corresponding relationship between the set wind and the set closing temperature threshold corresponding to the same set wind of the indoor fan is determined as the first closing temperature threshold of the electric auxiliary heating device corresponding to the wind of the indoor fan; The set state of the electric auxiliary heating device is the first closing 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 closing temperature threshold of the electric auxiliary heating device in the closing state of the electric auxiliary heating device; Wherein, the first closing temperature threshold of the electric auxiliary heating device includes: the first closing temperature, the second closing temperature and the second closing temperature which are sequentially reduced; The second closing temperature threshold of the electric auxiliary heating device includes: the first set temperature, the second set temperature and the third set temperature which are sequentially reduced; The first closing temperature is temperature TB1, the second closing temperature is temperature TB2, the third closing temperature is temperature TB3, the first set temperature is 2℃, the second set temperature is 1℃, and the third set temperature is 0℃.

[0092] Step S520, if it is determined that the difference between the set temperature of the air conditioner and the indoor environment 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 closing temperature and less than the second closing temperature, the first part of the electric heating assembly with small heating power in the two or more electric heating assemblies is controlled to be closed, preferably, the first part of the electric heating assembly with small heating power in the two or more electric heating assemblies is controlled to be closed in the order of heating power from small to large at a set time interval; Wherein, in the case that the two or more electric heating assemblies include a first electric heating assembly, a second electric heating assembly and a third electric heating assembly, the first electric heating assembly is controlled to be closed to control the two or more electric heating assemblies in the electric auxiliary heating device part to be partially closed.

[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 if it is determined that the pipe 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, then the second part of the electric heating components with lower heating power among the two or more sets of electric heating components is controlled to shut down. Preferably, the second part of the electric heating components with lower heating power among the two or more sets of electric heating components is controlled to shut down sequentially at a set time interval in order of increasing heating power; the number of the second part of the electric heating components with lower heating power is greater than the number of the first part of the electric heating components with lower heating power; wherein, when the two or more sets 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 shut down sequentially at a set time interval, so as to control the two or more sets of electric heating components in the electric auxiliary heating device to shut down.

[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 if it is determined that the pipe temperature of the indoor heat exchanger is greater than or equal to the first shut-off temperature, then control all two or more sets of electric heating components to shut off. Preferably, control the two or more sets of electric heating components to shut off sequentially at a set time interval in order of increasing heating power. Wherein, when the two or more sets of electric heating components include a first electric heating component, a second electric heating component, and a third electric heating component, control the first electric heating component, the second electric heating component, and the third electric heating component to shut off sequentially at a set time interval, so as to control all two or more sets of electric heating components in the electric auxiliary heating device to shut off.

[0095] like Figure 9 As shown, the control method for 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 under the following conditions, see steps 41, 42 and 43 for details.

[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 When the temperature reaches ≥ TB1, the first, second, and third electric heating components are simultaneously turned off.

[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 When the temperature reaches ≥ TB2, the first and second sets of electric heating components are simultaneously turned off.

[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 closed.

[0099] Wherein, the values of temperature TB1, temperature TB2 and temperature TB3 are associated with the air volume of the indoor fan, and specific examples are shown in Table 2.

[0100] Table 2

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

[0102] In step 4, the principle shown in step 3 and Table 1 is synchronized. When the indoor heat exchanger tube temperature T 内管 reaches a certain temperature or the outdoor ambient temperature T 内环 approaches the user-set target temperature T 设 , the electric heating components near the refrigerant inlet are preferentially closed, which reduces the auxiliary electric heating power of the electric auxiliary heating device while improving the uniformity of the air outlet temperature of the air conditioner and improving the utilization efficiency of the electric auxiliary heating device.

[0103] In steps 3 and 4, preferably, when the multiple groups of electric heating components are turned on or off, each group of electric heating components is actuated after a time interval t (t has a value range of 1s-5s, preferably 3s), to avoid abnormality of the controller caused by sudden change of current.

[0104] Step 5: In the state of the electric auxiliary heating device being turned on, it is indicated that the electric auxiliary heating device needs to work for a longer time. Therefore, the temperature value of the indoor heat exchanger tube temperature T 内管 below temperature TA1, temperature TA2 and temperature TA3 is increased by 1℃, to make the electric auxiliary heating device more easily turned on; and the temperature of the indoor heat exchanger tube temperature T 内管 above temperature TB1, temperature TB2 and temperature TB3 is also increased by 1℃, so that the electric auxiliary heating device is more difficult to exit, and the electric auxiliary heating device can work for a longer time and output more heat.

[0105] In step 5, when the set state F 设定 of the auxiliary electric heating function of the electric auxiliary heating device is the state of the electric auxiliary heating device being turned on, the control method is the same as that in the automatic state of the electric auxiliary heating device, wherein the preferred value of temperature Tk is 7℃, the preferred value of temperature Tc is 4℃, and the values of temperature TA1, temperature TA2, temperature TA3, temperature TB1, temperature TB2 and temperature TB3 are increased by 1℃ based on Table 1 and Table 2, so that the electric heating is more easily turned on and more difficult to exit, and the use time of the auxiliary electric heating is increased.

[0106] Step 6: When the auxiliary electric heating function of the electric auxiliary heating device is set to state F 设定 When the electric auxiliary heating device is off, the first group of electric heating components, the second group of electric heating components, and the third group of electric heating components are all off.

[0107] In 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, which realizes that the multi-stage electric heating components of the electric auxiliary heating device are gradually withdrawn from operation, reducing the temperature difference before and after the electric auxiliary heating device is withdrawn from operation and improving comfort.

[0108] In the present invention, the arrangement of the electric auxiliary heating element fins and the refrigerant flow path of the indoor heat exchanger are proposed. That is, the power of the electric heating elements arranged along the refrigerant flow path from the refrigerant inlet to the refrigerant outlet is from low to high, which conforms to the air conditioning operating environment (the flow path is from inlet to outlet, and the refrigerant temperature is from high to low). Moreover, group control is set up. Compared with control schemes that use pulse width modulation (PWM) and other methods to control the voltage duty cycle, the present invention is simple to control, low in cost, and easy to implement in engineering.

[0109] In this invention, a control strategy for the electric auxiliary heating device is proposed based on the layout relationship between the electric auxiliary heating device fins and the refrigerant flow path of the indoor heat exchanger. By judging the height of the indoor heat exchanger tube temperature, it is determined whether the auxiliary heating is activated and which set or multiple sets of electric heating components are activated for auxiliary electric heating. In terms of control, the electric heating fins in the low-temperature refrigerant section are given priority to be activated. Specific control logic is also given to realize the gradual deactivation of the multi-stage electric heating components of the electric auxiliary heating device, thereby improving comfort.

[0110] The technical solution of this embodiment involves installing an electric auxiliary heating device consisting of two or more sets of electric heating components for one or more refrigerant pipes in the indoor heat exchanger of an air conditioner. The heating power of the two or more sets of electric heating components is different. For each of the more than one refrigerant pipes, two or more sets of electric heating components with increasing heating power are arranged sequentially along the direction from the refrigerant inlet to the refrigerant outlet when the air conditioner is heating. When the air conditioner is in heating mode, the two or more sets of electric heating components are controlled to turn on or off step by step according to the outdoor ambient temperature, indoor ambient temperature, set temperature, indoor heat exchanger pipe temperature, and indoor fan speed. This causes the heating power of the electric auxiliary heating device to change step by step (e.g., in a stepped manner) when it is turned on or off, thereby making the air outlet temperature of the air conditioner more uniform. Thus, by making the heating power of the electric auxiliary heating device change step by step when it is turned on or off, the air outlet temperature of the air conditioner is made more uniform, reducing the temperature difference before and after the electric auxiliary heating device is turned off, and improving comfort.

[0111] According to the embodiment of the present application, a control device of an air conditioner corresponding to the control method of the air conditioner is also provided. Referring to Figure 6 The structural schematic diagram of an embodiment of the device of the present application 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 than one refrigerant pipe. When the number of the one or more than one refrigerant pipe is two or more, 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 refrigerant pipe in the one or more than one refrigerant pipe (such as refrigerant pipe 10), the two or more groups of electric heating components with the 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 during the heating operation of the air conditioner. Each group of electric heating components includes two or more electric heating fins (such as electric heating fin 20). The electric heating fin 20 can be a PTC electric heating fin. In the scheme of the present application, as shown in Figure 6 The control device of the air conditioner includes an acquisition unit 102 and a control unit 104.

[0112] The acquisition unit 102 is configured to acquire the outdoor environment temperature of the air conditioner, acquire the indoor environment temperature of the air conditioner, acquire the pipe temperature of the indoor heat exchanger, acquire the set temperature of the air conditioner, acquire the wind stop of the indoor fan, and acquire the set state of the electric auxiliary heating device when the air conditioner is in the heating operation. 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. The outdoor environment temperature of the air conditioner is, for example, outdoor environment temperature T 外环 The indoor environment temperature of the air conditioner is, for example, indoor environment temperature T 内环 The pipe temperature of the indoor heat exchanger is, for example, indoor heat exchanger pipe temperature T 内管 The set temperature of the air conditioner is, for example, user set target temperature T 设 The set state of the electric auxiliary heating device is, for example, the set state F 设定 of the auxiliary electric heating function of the electric auxiliary heating device. The specific functions and processes of the acquisition unit 102 are described in step S110.

[0113] The control unit 104 is configured to maintain or control the two or more groups of electric heating components to be 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 all the two or more groups of electric heating components in the electric auxiliary heating device to be off. The specific functions and processes of the control unit 104 are described in step S120.

[0114] The control unit 104 is further configured to, 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, control the two or more groups of electric heating components to act step by step in combination with at least one of the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the wind stop 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. Specifically, the control of the two or more groups of electric heating components to act 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 act includes: in the case that all of the two or more groups of electric heating components are closed, the two or more groups of electric heating components are controlled to be opened 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 be opened. The control of the two or more groups of electric heating components to act 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 act also specifically includes: in the case that all of the two or more groups of electric heating components are opened, the two or more groups of electric heating components are controlled to be opened 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 be opened. The specific functions and processes of the control unit 104 are also described in step S130.

[0115] The layout scheme of the PTC electric heating pipe and the control scheme of the electric auxiliary heating device for auxiliary electric heating output provided by the scheme of the application are used to arrange the flow process of the PTC electric heating pipe and the refrigerant flow path of the indoor heat exchanger in the electric auxiliary heating device, control the output power of the electric auxiliary heating device for auxiliary electric heating according to the current load, and improve the 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; and the first electric heating component, the second electric heating component, and the third electric heating component are connected in parallel.

[0117] Figure 7 The flow process arrangement relationship between the electric heating sheet and the refrigerant flow path of the indoor heat exchanger is shown in the figure. Figure 7As shown, the indoor heat exchanger has two or more refrigerant tubes (such as refrigerant tube 10), each of which has a refrigerant inlet (such as refrigerant inlet 11) and a refrigerant outlet (such as refrigerant outlet 12). The two or more refrigerant tubes are connected in parallel, specifically, the refrigerant inlets of all the two or more refrigerant tubes are connected together, and the refrigerant outlets are connected together. For example, in the case where the two or more refrigerant tubes specifically include three refrigerant tubes, in the electric auxiliary heating device of the air conditioner, three groups of electric heating assemblies are provided for the three refrigerant tubes. Each group of electric heating assemblies includes two or more electric heating fins, and in each group of electric heating assemblies, the arrangement of the two or more electric heating fins is associated with the refrigerant flow direction when the indoor heat exchanger is heating. Specifically, in each group of electric heating assemblies, the arrangement direction of the two or more electric heating fins is arranged in the direction of the refrigerant temperature from high to low in the corresponding refrigerant tube, and in the direction of the refrigerant temperature from low to high in the refrigerant tube, the power of the two or more electric heating fins is from low to high. That is, from the refrigerant inlet to the refrigerant outlet when the refrigerant tube is heating, the power of the two or more electric heating fins gradually increases, that is, the power of the electric heating fin at the refrigerant inlet when the refrigerant tube is heating is small, and the power of the electric heating fin at the refrigerant outlet when the refrigerant tube is heating is slightly larger, in a stepped manner.

[0118] In the scheme of the present application, the three groups of electric heating assemblies are specifically: the first group of electric heating assemblies, the second group of electric heating assemblies, and the third group of electric heating assemblies. The first group of electric heating assemblies, the second group of electric heating assemblies, and the third group of electric heating assemblies are connected in parallel. In the scheme of the present application, the three groups of electric heating assemblies are connected in parallel, and the three groups of electric heating assemblies are controlled by a single control circuit. Figure 7 In the example shown, the three groups of electric heating assemblies share a zero line, and the fire line ends are controlled respectively, so that the working state of each group of electric heating assemblies can be controlled respectively. Each fire line has a relay switch, which can control whether a certain group of electric heating assemblies is powered on or not.

[0119] The first group of electric heating assemblies is a series connection of electric heating fins at the front end of each flow path process, and the power thereof accounts for about A% of the total power (A has a value range of 20-40, and is preferably 25). The second group of heating fins is a series connection of heating fins at the middle position of each flow path process, and the power thereof accounts for about B% of the total power (B has a value range of 20-40, and is preferably 30). The third group of heating fins is a series connection of heating fins at the end of each flow path process, and the power thereof accounts for about C% of the total power (C has a value range of 30-50, and is preferably 45).

[0120] In the scheme of the present application, the number of electric heating assemblies in the electric auxiliary heating device can be set according to actual needs. The preferred scheme is three groups, which can balance the effect and cost, because if the number of electric heating assemblies is small, the stepped control effect will be poor, and if the number of electric heating assemblies is large, the number of control lines that need to be controlled separately will increase, resulting in an increase in control cost.

[0121] In some embodiments, in the first electric heating assembly, the second electric heating assembly and the third electric heating assembly, each electric heating assembly comprises two or more electric heating pieces with the same heating power and / or two or more electric heating pieces with different heating powers; in each electric heating assembly, the two or more electric heating pieces with the 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 during the heating operation of the air conditioner.

[0122] Figure 7 The numbers on the middle electric heating pieces represent different groups of electric heating pieces, 1, 2 and 3 represent the group number, and the number 1 represents the electric heating piece in the first electric heating assembly, the number 2 represents the electric heating piece in the second electric heating assembly, and the number 3 represents the electric heating piece in the third electric heating assembly. The arrangement relationship between the electric heating pieces and the flow path is shown in FIG. 2. Figure 7 Figure 7 In the example shown in FIG. 2, the multiple electric heating pieces arranged at each refrigerant pipe are marked as 1, 2 and 3. For example, along the direction from the refrigerant inlet to the refrigerant outlet of the first refrigerant pipe during the heating operation, the electric heating piece 1, the electric heating piece 1, the electric heating piece 2, the electric heating piece 2, the electric heating piece 3, the electric heating piece 3 and the electric heating piece 3 are arranged in sequence and connected in series. Along the direction from the refrigerant inlet to the refrigerant outlet of the second refrigerant pipe during the heating operation, the electric heating piece 1, the electric heating piece 1, the electric heating piece 2, the electric heating piece 2, the electric heating piece 2, the electric heating piece 3, the electric heating piece 3 and the electric heating piece 3 are arranged in sequence and connected in series. Along the direction from the refrigerant inlet to the refrigerant outlet of the third refrigerant pipe during the heating operation, the electric heating piece 1, the electric heating piece 1, the electric heating piece 2, the electric heating piece 2, the electric heating piece 2, the electric heating piece 3, the electric heating piece 3 and the electric heating piece 3 are arranged in sequence and connected in series.

[0123] The number of electric heating pieces in each electric heating assembly and the power of each electric heating piece can be different. The power of each electric heating piece can be different, and generally, several electric heating pieces with different powers are arranged in combination in the same electric heating assembly. Generally, the total power of each group is distributed on A%, B% and C%, and the power of the electric heating pieces arranged at the position with high power is generally higher.

[0124] In the scheme of the present application, the electric heating pieces are arranged and matched with the heat distribution on the refrigerant flow path based on the arrangement relationship between the electric auxiliary heating device and the refrigerant flow path of the indoor heat exchanger, and the electric auxiliary heating device is turned on and off in a stepwise manner, which solves the problem of large temperature difference before and after the electric auxiliary heating device is turned on and off in the related scheme, and is beneficial to improving the user comfort.

[0125] ​In some embodiments, for each of the one or more refrigerant tubes, each refrigerant tube has a front end, a middle section and a tail end along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant tube during the heating operation of the air conditioner; the first electric heating assembly is arranged at the front end of each refrigerant tube, the second electric heating assembly is arranged at the middle section of each refrigerant tube, and the third electric heating assembly is arranged at the tail end of each refrigerant tube.

[0126] As shown in Figure 7 From the refrigerant inlet to the refrigerant outlet of the refrigerant tube, the pipeline is called a flow path, for example, three refrigerant tubes have three refrigerant inlets and three refrigerant outlets, which are called three-way flow paths. The front end of each flow path refers to a 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 / 3-2 / 3 of the total flow length, and the tail end is from the refrigerant inlet position to 2 / 3 of the total flow length to the refrigerant outlet. Figure 8 The flow distribution diagram of the refrigerant flow path of the indoor heat exchanger is shown in Figure 8 As shown in

[0127] In the scheme of the present application, a multi-stage electric heating assembly based on the layout relationship between the electric auxiliary heating device row 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 row and the refrigerant flow path of the indoor heat exchanger is proposed, which realizes the step-by-step withdrawal of the multi-stage electric heating assembly of the electric auxiliary heating device, reduces the temperature difference change before and after the withdrawal of the electric auxiliary heating device, and improves the comfort.

[0128] In some embodiments, the control unit 104 controls the two or more electric heating assemblies to act step by step to control all or part of the two or more electric heating assemblies in the electric auxiliary heating device, in combination with at least one of the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the wind stop of the indoor fan, including: controlling the process of turning on the electric auxiliary heating device, specifically as follows:

[0129] The control unit 104 is specifically configured to determine whether the electric auxiliary heating device needs to be turned on according to the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, and the set temperature of the air conditioner, in the case that 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, and the two or more electric heating assemblies in the electric auxiliary heating device are all closed, i.e. in the case that the two or more electric heating assemblies are all closed. The specific functions and processes of the control unit 104 are also referred to step S210.

[0130] The control unit 104 is further configured to, if it is determined that the electric auxiliary heating device needs to be turned on, control the two or more groups of electric heating components to be turned on step by step according to the pipe temperature of the indoor heat exchanger and the air damper 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 be 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 off. The specific functions and processes of the control unit 104 will be further described with reference to step S220.

[0131] In the scheme of the present application, the lower the temperature of the indoor environment temperature, the outdoor environment temperature, the pipe temperature of the indoor heat exchanger, etc., the more the number of electric heating components to be turned on, and the electric heating components close to the end of the process (i.e., the third group of electric heating components) are preferentially turned on, the second group of electric heating components are secondly turned on, and the first group of electric heating components are lastly turned on, so that the auxiliary electric heating ladder of the electric auxiliary heating device is put into use, effectively reducing the temperature fluctuation and improving the comfort.

[0132] In some embodiments, the two or more groups of electric heating components are controlled to act step by step according to at least one of the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, the pipe temperature of the indoor heat exchanger, the set temperature of the air conditioner, and the air damper 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. The process of turning on the electric auxiliary heating device includes the following steps:

[0133] The control unit 104 is further configured to, in the case that 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, and in the case that all of the two or more groups of electric heating components in the electric auxiliary heating device are turned on (i.e., in the case that all of the two or more groups of electric heating components are turned on), control the two or more groups of electric heating components to be turned off step by step according to the set temperature of the air conditioner, the indoor environment temperature of the air conditioner, and the air damper of the indoor fan, or according to the pipe temperature of the indoor heat exchanger and the air damper 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 be turned off. The specific functions and processes of the control unit 104 will be further described with reference to step S230.

[0134] In the scheme of the present application, when the temperature of the indoor environment temperature, the outdoor environment temperature, the pipe temperature of the indoor heat exchanger, etc. reaches the target value, the first group of electric heating components are preferentially turned off, the second group of electric heating components are secondly turned off, and the third group of electric heating components are lastly turned off, so that the auxiliary electric heating ladder of the electric auxiliary heating device is put out of use, effectively reducing the temperature fluctuation and improving the comfort.

[0135] In the scheme of the present application, when controlling the electric auxiliary heating device, the opening and closing of each group of electric heating components in the electric auxiliary heating device is controlled by the indoor ambient temperature, the outdoor ambient temperature, and the indoor heat exchanger tube temperature. The lower the temperature of the indoor ambient temperature, the outdoor ambient temperature, and the indoor heat exchanger tube temperature, the more the number of electric heating components that are turned on, and 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 preferentially turned on, followed by the second group of electric heating components, and finally the first group of electric heating components. When the temperature of the indoor ambient temperature, the outdoor ambient temperature, and the indoor heat exchanger tube temperature reaches the target value, the first group of electric heating components is preferentially turned off, 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 whole group is turned on or turned off. In this way, by sequentially turning on and turning off different groups of electric heating components under different conditions, the auxiliary electric heating ladder of the electric auxiliary heating device is put into use or taken out of use, effectively reducing temperature fluctuations and improving comfort.

[0136] In some embodiments, the control unit 104 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:

[0137] The control unit 104 is specifically 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 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, for example, temperature T k C, and the preset temperature difference threshold is, for example, Tc C. The specific functions and processes of the control unit 104 are also referred to in step S310.

[0138] The control unit 104 is specifically further configured to determine that the electric auxiliary heating device does not need to be turned on if it is determined that the conditions are not met. The specific functions and processes of the control unit 104 are also referred to in step S320.

[0139] The control unit 104 is specifically further configured to determine that the electric auxiliary heating device needs to be turned on if it is determined that the conditions are met. The specific functions and processes of the control unit 104 are also referred to in step S330.

[0140] Figure 9 A flowchart of an embodiment of a control method for the electric auxiliary heating device operation mode of a heat pump air conditioner. As shown in Figure 9 The control method for the electric auxiliary heating device operation mode of a heat pump air conditioner includes:

[0141] Step 1, in the case of air conditioning heating operation, detecting the indoor ambient temperature T 内环 , the outdoor ambient temperature T 外环 , and the 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 target temperature T set by the user 设 , then step 2 or step 5 or step 6 is executed. The setting state F of the auxiliary electric heating function of the electric auxiliary heating device 设定 , there are three states: the electric auxiliary heating device is on, the electric auxiliary heating device is off, and the electric auxiliary heating device is automatic.

[0142] Step 2, when the setting state F of the auxiliary electric heating function of the electric auxiliary heating device 设定 is the state that the electric auxiliary heating device is automatic, it is determined whether the outdoor environment temperature T 外环 ≤ temperature T k ℃, and the target temperature T set by the user 设 - the indoor environment temperature T 内环 ≥ temperature Tc℃: if yes, step 3 is executed to control the three groups of electric heating components to be turned on step by step, otherwise, the current control of the electric auxiliary heating device is ended.

[0143] In the scheme of the present application, according to the outdoor environment temperature of the air conditioner, the indoor environment temperature of the air conditioner, and the set temperature of the air conditioner, it is determined whether the electric auxiliary heating device needs to be turned on, so as to control or keep the electric auxiliary heating device off to save energy in the case of determining that the electric auxiliary heating device does not need to be turned on, and to execute the turning-on strategy of the electric auxiliary heating device in the case of determining that the electric auxiliary heating device needs to be turned on, so as to 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 pipe temperature of the indoor heat exchanger and the air damper 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 be turned on, including:

[0145] The control unit 104 is specifically configured to determine, according to a corresponding relationship between the set air damper and the set turning-on temperature threshold, the set turning-on temperature threshold corresponding to the set air damper same as the air damper of the indoor fan in the corresponding relationship as the turning-on temperature threshold of the electric auxiliary heating device corresponding to the air damper of the indoor fan; the set state of the electric auxiliary heating device is the turning-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 turning-on temperature threshold of the electric auxiliary heating device in the on state of the electric auxiliary heating device; wherein the turning-on temperature threshold of the electric auxiliary heating device includes: a first turning-on temperature, a second turning-on temperature, and a third turning-on temperature that increase in turn. The specific functions and processes of the control unit 104 are also referred to step S410.

[0146] The control unit 104 is further configured to, if the pipe temperature of the indoor heat exchanger is determined to be less than or equal to the first activation temperature, control all two or more sets of electric heating components to activate. Preferably, the control unit controls the two or more sets of electric heating components to activate sequentially at set time intervals in descending order of heating power. Specifically, when the two or more sets of electric heating components include a first electric heating component, a second electric heating component, and a third electric heating component, the control unit controls the third electric heating component, the second electric heating component, and the first electric heating component to activate sequentially at set time intervals, thereby controlling all two or more sets of electric heating components in the electric auxiliary heating device to activate. The specific functions and processing of this control unit 104 are further described in step S420.

[0147] The control unit 104 is further configured to, if it is determined that the pipe temperature of the indoor heat exchanger is greater than the first opening temperature and less than or equal to the second opening temperature, control all the first part of the electric heating components with higher heating power among the two or more sets of electric heating components to open. Preferably, the first part of the electric heating components with higher heating power among the two or more sets of electric heating components is controlled to open sequentially at a set time interval in descending order of heating power. Where the two or more sets 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 open sequentially at a set time interval, thereby controlling the opening of the two or more sets of electric heating components in the electric auxiliary heating device. The specific functions and processing of this control unit 104 are also described in step S430.

[0148] The control unit 104 is further configured to, if it is determined that the pipe temperature of the indoor heat exchanger is greater than the second opening temperature and less than or equal to the third opening temperature, control all the second part of the electric heating components with higher heating power among the two or more sets of electric heating components to open. Preferably, the second part of the electric heating components with higher heating power among the two or more sets of electric heating components are controlled to open sequentially at a set time interval in descending order of heating power; the number of the second part of the electric heating components with higher heating power is less than the number of the first part of the electric heating components with higher heating power; wherein, when the two or more sets 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 open, so as to control the partial opening of the two or more sets of electric heating components in the electric auxiliary heating device. The specific functions and processing of the control unit 104 are also described in step S440.

[0149] like Figure 9 As shown, the control method for 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 is detected... 外环 ≤Temperature T k ℃ (temperature T)k The value range is 0℃-10℃, preferably 2℃, while the user sets the target temperature T 设 -Indoor ambient temperature T 内环 ≥ Temperature Tc℃ (the value range of temperature Tc is 1℃-5℃, preferably 3℃), the electric auxiliary heating device is started according to the following conditions: judging the indoor heat exchanger tube temperature T 内管 The temperature interval is determined according to the indoor heat exchanger tube temperature T 内管 The first group of electric heating components, the second group of electric heating components and the third group of electric heating components are controlled to be started according to the temperature interval, which can be seen in steps 31, 32 and 33.

[0150] Step 31, if the indoor heat exchanger tube temperature T 内管 ≤ Temperature TA1, the third group of electric heating components, the second group of electric heating components and the first group of electric heating components are started at the same time, and then step 4 is executed.

[0151] Step 32, if the indoor heat exchanger tube temperature T 内管 ≤ Temperature TA2, the third group of electric heating components and the second group of electric heating components are started 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 started.

[0153] The values of temperature TA1, temperature TA2 and temperature TA3 are associated with the air outlet of the indoor fan, which can be seen in Table 1.

[0154] In step 3, from the setting parameters, temperature TA1 < temperature TA2 < temperature TA3 can be seen from Table 1, when the indoor heat exchanger tube temperature T 内管 is lower, the power of the electric auxiliary heating device to be started is higher (i.e. the number of electric heating components is more); when the indoor heat exchanger tube temperature T 内管 is higher, only the electric heating components close to the outlet of the refrigerant (the temperature of the refrigerant is low) are started, so that the outlet air temperature of the air conditioner is more uniform in terms of spatial distribution. For example: the temperature of the refrigerant at the inlet is 70℃, and the temperature of the refrigerant at the outlet is 40℃, which shows that the outlet air temperature of the air conditioner is about: the outlet air temperature at the inlet of the refrigerant is 45℃, and the outlet air temperature at the outlet of the refrigerant is 35℃, after the auxiliary electric heating of the electric heating components at the outlet of the refrigerant is started, the outlet air temperature at the outlet of the refrigerant is about 5℃ higher, so that the outlet air temperature at the inlet and outlet of the refrigerant is more uniform.

[0155] In some embodiments, the control unit 104 controls the two or more groups of electric heating components to be turned off step by step according to the set temperature of the air conditioner, the indoor environment temperature of the air conditioner, and the air damper of the indoor fan, or according to the tube temperature of the indoor heat exchanger and the air damper of the indoor fan, to control all or part of the two or more groups of electric heating components in the electric auxiliary heating device to be turned off, including:

[0156] The control unit 104 is specifically further configured to determine, according to a corresponding relationship between a set air damper and a set closing temperature threshold, a set closing temperature threshold corresponding to a set air damper same as the air damper of the indoor fan in the corresponding relationship as the first closing temperature threshold of the electric auxiliary heating device corresponding to the air damper of the indoor fan; the set state of the electric auxiliary heating device is the first closing 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 closing temperature threshold of the electric auxiliary heating device in the closed state of the electric auxiliary heating device; wherein the first closing temperature threshold of the electric auxiliary heating device includes a first closing temperature, a second closing temperature, and a second closing temperature that decrease in turn; the second closing 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 turn; the first closing temperature is temperature TB1, the second closing temperature is temperature TB2, the third closing temperature is temperature TB3, the first set temperature is 2℃, the second set temperature is 1℃, and the third set temperature is 0℃. The specific functions and processes of the control unit 104 are also described in step S510.

[0157] The control unit 104 is specifically further configured to control the first part of the two or more groups of electric heating components with small heating power to be turned off if it is determined that the difference between the set temperature of the air conditioner and the indoor environment temperature of the air conditioner is less than or equal to the first set temperature and greater than the second set temperature, or that the tube temperature of the indoor heat exchanger is greater than or equal to the third closing temperature and less than the second closing temperature, preferably, the first part of the two or more groups of electric heating components with small heating power are controlled to be turned off in turn at a set time interval 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 to control part of the two or more groups of electric heating components in the electric auxiliary heating device to be turned off. The specific functions and processes of the control unit 104 are also described in step S520.

[0158] The control unit 104 is further configured to control the second part of the two or more electric heating assemblies with small heating power to be closed if it is determined that the difference between the set temperature of the air conditioner and the indoor environment temperature of the air conditioner is less than or equal to the second set temperature and greater than the first set temperature, or that the tube temperature of the indoor heat exchanger is greater than or equal to the second closing temperature and less than the first closing temperature, preferably, the second part of the two or more electric heating assemblies with small heating power is closed in the order of heating power from small to large at a set time interval; the number of the second part of the two or more electric heating assemblies with small heating power is greater than the number of the first part of the two or more electric heating assemblies with small heating power; in the case that the two or more electric heating assemblies include a first electric heating assembly, a second electric heating assembly and a third electric heating assembly, the first electric heating assembly and the second electric heating assembly are controlled to be closed in a set time interval to control the two or more electric heating assemblies in the electric auxiliary heating device to be partially closed. The specific functions and processes of the control unit 104 are also described in step S530.

[0159] The control unit 104 is further configured to control the two or more electric heating assemblies to be closed if it is determined that the difference between the set temperature of the air conditioner and the indoor environment temperature of the air conditioner is less than or equal to the third set temperature, or that the tube temperature of the indoor heat exchanger is greater than or equal to the first closing temperature, preferably, the two or more electric heating assemblies are closed in the order of heating power from small to large at a set time interval; in the case that the two or more electric heating assemblies include a first electric heating assembly, a second electric heating assembly and a third electric heating assembly, the first electric heating assembly, the second electric heating assembly and the third electric heating assembly are controlled to be closed in a set time interval to control the two or more electric heating assemblies in the electric auxiliary heating device to be completely closed. The specific functions and processes of the control unit 104 are also described in step S540.

[0160] As shown in FIG. 4, the control method of the electric auxiliary heating device of the heat pump air conditioner further includes the following steps. Figure 9 The control method of the electric auxiliary heating device of the heat pump air conditioner further includes the following steps.

[0161] If the user sets the target temperature T 设 - the outdoor environment temperature T 内环 ≤ 0℃ or the tube temperature T 内管 ≥ the temperature TB1, the first electric heating assembly, the second electric heating assembly and the third electric heating assembly are closed at the same time.

[0162] If the user sets the target temperature T 设 - the outdoor environment temperature T 内环≤ 1℃ or indoor heat exchanger tube temperature T 内管 ≥ temperature TB2, while the first group of electric heating components and the second group of electric heating components are closed.

[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 closed.

[0164] Wherein, the values of temperature TB1, temperature TB2 and temperature TB3 are associated with the air volume of the indoor fan, and specific examples can be seen in Table 2.

[0165] In step 4, the principle shown in step 3 and Table 1 is synchronized, when the indoor heat exchanger tube temperature T 内管 reaches a certain temperature or the outdoor ambient temperature T 内环 approaches the user-set target temperature T 设 , the electric heating components close to the refrigerant inlet are preferentially closed, which reduces the auxiliary electric heating power of the electric auxiliary heating device while improving the uniformity of the air outlet temperature of the air conditioner, and improves the utilization efficiency of the electric auxiliary heating device.

[0166] In steps 3 and 4, preferably, when the multiple groups of electric heating components are turned on or off, each group of electric heating components is actuated after an interval t (t has a value range of 1s-5s, preferably 3s), to avoid abnormality of the controller caused by sudden change of current.

[0167] Step 5, in the state of turning on the electric auxiliary heating device, it is explained that the electric auxiliary heating device needs to work for a longer time. Therefore, when the indoor heat exchanger tube temperature T 内管 is lower than temperature TA1, temperature TA2 and temperature TA3, the temperature value of the condition for turning on the electric auxiliary heating device is increased by 1℃, so that the electric auxiliary heating device is more easily turned on; when the indoor heat exchanger tube temperature T 内管 is higher than temperature TB1, temperature TB2 and temperature TB3, the temperature for closing the electric auxiliary heating device is also increased by 1℃, so that the electric auxiliary heating device is more difficult to exit, the electric auxiliary heating device can work for a longer time, and more heat can be output.

[0168] In step 5, when the set state F 设定 of the auxiliary electric heating function of the electric auxiliary heating device is the state of turning on the electric auxiliary heating device, 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℃, the preferred value of temperature Tc is 4℃, and the values of temperature TA1, temperature TA2, temperature TA3, temperature TB1, temperature TB2 and temperature TB3 are increased by 1℃ based on Table 1 and Table 2, so that the electric heating is more easily turned on and more difficult to exit, and the use time of the auxiliary electric heating is increased.

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

[0170] In the scheme of the present application, the indoor environment temperature, the outdoor environment temperature and the indoor heat exchanger tube temperature are used to control the turning on and turning off of each group of electric auxiliary heating, and specifically, a multi-stage electric heating is used to realize the step-by-step withdrawal of the multi-stage electric heating components of the electric auxiliary heating device, reduce the temperature difference change before and after the withdrawal of the electric auxiliary heating device, and improve the comfort.

[0171] In the scheme of the present application, the layout relationship between the electric auxiliary heating device and the refrigerant flow process of the indoor heat exchanger is proposed, that is, the power of the electric heating fins arranged on the path from the refrigerant inlet to the refrigerant outlet of the refrigerant flow process of the indoor heat exchanger is from low to high, which matches the air conditioner use environment (the refrigerant temperature is from high to low from the inlet to the outlet of the process), and the grouping control is set; compared with the control scheme of controlling the voltage duty cycle by using pulse width modulation (PWM), the scheme of the present application is simple in control, low in cost and low in engineering implementation difficulty.

[0172] In the scheme of the present application, an electric auxiliary device control strategy based on the layout relationship between the electric auxiliary heating device and the refrigerant flow process of the indoor heat exchanger is proposed, the turning on and turning off of the auxiliary heating and the specific input of which group of electric heating components or multiple groups of electric heating components are determined by judging the height of the indoor heat exchanger tube temperature, the electric heating fins of the low-temperature refrigerant section are preferentially put into work in control, and the specific control logic is given, realizing the step-by-step withdrawal of the multi-stage electric heating components of the electric auxiliary heating device, improving the comfort.

[0173] Since the processing and functions realized by the device of the present embodiment basically correspond to the embodiments, principles and examples of the foregoing method, details not described in the description of the present embodiment can be referred to the related description in the foregoing embodiments, which will not be repeated here.

[0174] According to the embodiments of the present application, an air conditioner corresponding to the control device of the air conditioner is also provided. The air conditioner can include the control device of the air conditioner described above.

[0175] Since the processing and functions realized by the air conditioner of the present embodiment basically correspond to the embodiments, principles and examples of the foregoing device, details not described in the description of the present embodiment can be referred to the related description in the foregoing embodiments, which will not be repeated here.

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

[0177] Since the processing and functions realized by the product of the present embodiment are basically corresponding to the embodiments, principles and examples of the foregoing method, the descriptions of the present embodiment which are not elaborated can be referred to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

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

[0179] Since the processing and functions realized by the storage medium of the present embodiment are basically corresponding to the embodiments, principles and examples of the foregoing method, the descriptions of the present embodiment which are not elaborated can be referred to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

[0180] In summary, those skilled in the art can easily understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0181] The above only describes the embodiments of the present application and is not used to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A method for controlling an air conditioner, characterized in that, The indoor unit of the air conditioner includes an indoor heat exchanger, an electric auxiliary heating device, and an indoor fan; the indoor heat exchanger includes one or more refrigerant pipes; the electric auxiliary heating device includes two or more sets of electric heating components with different heating powers; for each of the one or more refrigerant pipes, the two or more sets of electric heating components with increasing heating powers are arranged sequentially along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe during the heating operation of the air conditioner. The air conditioner control method includes: When the air conditioner is in heating mode, 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 fan speed of the indoor fan, and the setting status of the electric auxiliary heating device are obtained; wherein, the setting status 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. If the electric auxiliary heating device is set to the off state, then the two or more sets of electric heating components are kept off, so as to keep or control all the two or more sets of electric heating components in the electric auxiliary heating device off. If the electric auxiliary heating device is set to automatic operation or on state, then by combining 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 fan speed of the indoor fan, the two or more sets of electric heating components are controlled to operate in stages, so as to control all or part of the two or more sets of electric heating components in the electric auxiliary heating device to operate.

2. The air conditioning control method according to claim 1, characterized in that, The two or more sets 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; in, In the first electric heating assembly, the second electric heating assembly, and the third electric heating assembly, each group of electric heating assemblies includes: two or more electric heating elements with the same heating power, and / or two or more electric heating elements with different heating power; in each group of electric heating assemblies, along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe during the air conditioning heating operation, the two or more electric heating elements with heating power from small to large are arranged sequentially. 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 during the air conditioning heating operation, each refrigerant pipe has three parts: a front end, a middle end, and a rear end; the first electric heating component is arranged at the front end of each refrigerant pipe, the second electric heating component is arranged at the middle end of each refrigerant pipe, and the third electric heating component is arranged at the rear end of each refrigerant pipe.

3. The air conditioning control method according to claim 1 or 2, characterized in that, By combining 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 fan speed of the indoor fan, the two or more sets of electric heating components are controlled to operate in stages, so as to control all or part of the two or more sets of electric heating components in the electric auxiliary heating device to operate, including: When all two or more sets of electric heating components in the electric auxiliary heating device are turned off, it is determined whether the electric auxiliary heating device needs to be turned on based on 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 sets of electric heating components are controlled to be turned on in stages according to the pipe temperature of the indoor heat exchanger and the fan speed of the indoor fan, so as to control all or part of the two or more sets of electric heating components in the electric auxiliary heating device to be turned on. And / or, When all two or more sets of electric heating components in the electric auxiliary heating device are turned on, the two or more sets of 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 fan speed of the indoor fan, or according to the pipe temperature of the indoor heat exchanger and the fan speed of the indoor fan, so as to control all or part of the two or more sets of electric heating components in the electric auxiliary heating device to be turned off.

4. The air conditioning control method according to claim 3, characterized in that, Determining whether the electric auxiliary heating device needs to be turned on based on 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 requirements are not met, then it is determined that the electric auxiliary heating device does not need to be turned on. If the conditions are met, then it is determined that the electric auxiliary heating device needs to be turned on.

5. The air conditioning control method according to claim 3, characterized in that, Based on the pipe temperature of the indoor heat exchanger and the fan speed, the two or more sets of electric heating components are controlled to turn on in stages, so as to control all or part of the two or more sets of electric heating components in the electric auxiliary heating device to turn on, including: Based on the correspondence between the set fan speed and the set on-state temperature threshold, the set on-state temperature threshold corresponding to the same set fan speed as the indoor fan speed is determined as the on-state temperature threshold of the electric auxiliary heating device corresponding to the indoor fan speed. The set state of the electric auxiliary heating device is the on-state temperature threshold of the electric auxiliary heating device in the automatic operation state, which is lower than the on-state temperature threshold of the electric auxiliary heating device. The on-state temperature threshold of the electric auxiliary heating device includes: a first on-state temperature, a second on-state temperature, and a third on-state temperature that increase sequentially. If the tube temperature of the indoor heat exchanger is determined to be less than or equal to the first start-up temperature, then all two or more sets of electric heating components are controlled to start; wherein, when the two or more sets 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 start sequentially at a set time interval, so as to control all two or more sets of electric heating components in the electric auxiliary heating device to start; If it is determined that the pipe temperature of the indoor heat exchanger is greater than the first opening temperature and less than or equal to the second opening temperature, then the first part of the electric heating components with the higher heating power among the two or more sets of electric heating components is controlled to be turned on; wherein, when the two or more sets 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 sequentially at a set time interval, so as to control the partial opening of the two or more sets of electric heating components in the electric auxiliary heating device; If the pipe temperature of the indoor heat exchanger is determined to be greater than the second opening temperature and less than or equal to the third opening temperature, then the second part of the electric heating components with higher heating power among the two or more sets of electric heating components is controlled to open; the number of the second part of the electric heating components with higher heating power is less than the number of the first part of the electric heating components with higher heating power; wherein, when the two or more sets 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 open, so as to control the partial opening of the two or more sets of electric heating components in the electric auxiliary heating device.

6. The air conditioning control method according to claim 3, characterized in that, Based on the set temperature of the air conditioner, the indoor ambient temperature of the air conditioner, and the fan speed of the indoor fan, or based on the pipe temperature of the indoor heat exchanger and the fan speed of the indoor fan, the two or more sets of electric heating components are controlled to shut down step by step, so as to control all or part of the two or more sets of electric heating components in the electric auxiliary heating device to shut down, including: Based on the correspondence between the set fan speed and the set shut-off temperature threshold, the set shut-off temperature threshold corresponding to the same set fan speed as the indoor fan speed is determined as the first shut-off temperature threshold of the electric auxiliary heating device corresponding to the indoor fan speed. The set state of the electric auxiliary heating device is the first shut-off temperature threshold of the electric auxiliary heating device in the automatic operation state, which is lower than the first shut-off temperature threshold of the electric auxiliary heating device in the shut-off state. The first shut-off temperature threshold of the electric auxiliary heating device includes: a first shut-off temperature, a second shut-off temperature, and a third shut-off temperature that decrease sequentially. The second shut-off temperature threshold of the electric auxiliary heating device includes: a first set temperature, a second set temperature, and a third set temperature that decrease sequentially. 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 if it is determined that the pipe 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, then the first part of the electric heating components with the lower heating power among the two or more sets of electric heating components is controlled to shut down; wherein, when the two or more sets 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 shut down, so as to control the partial shutdown of the two or more sets of electric heating components in the electric auxiliary heating device; 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 if it is determined that the pipe 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, then the second part of the electric heating components with lower heating power among the two or more sets of electric heating components is controlled to shut down; the number of the second part of the electric heating components with lower heating power is greater than the number of the first part of the electric heating components with lower heating power; wherein, when the two or more sets 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 shut down sequentially at a set time interval, so as to control the partial shutdown of the two or more sets of electric heating components in the electric auxiliary heating device; 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 pipe temperature of the indoor heat exchanger is greater than or equal to the first shut-off temperature, then the two or more sets of electric heating components are controlled to shut off; wherein, when the two or more sets 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 shut off sequentially at a set time interval, so as to control all the two or more sets of electric heating components in the electric auxiliary heating device to shut off.

7. A control device for an air conditioner, characterized in that, The indoor unit of the air conditioner includes an indoor heat exchanger, an electric auxiliary heating device, and an indoor fan; the indoor heat exchanger includes one or more refrigerant pipes; the electric auxiliary heating device includes two or more sets of electric heating components with different heating powers; for each of the one or more refrigerant pipes, the two or more sets of electric heating components with increasing heating powers are arranged sequentially along the direction from the refrigerant inlet to the refrigerant outlet of each refrigerant pipe during the heating operation of the air conditioner. The control device for the air conditioner includes: The acquisition unit 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 fan speed of the indoor fan, and the setting status of the electric auxiliary heating device when the air conditioner is in heating operation; the setting status 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 control unit is configured to maintain or control the two or more sets 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 sets of electric heating components in the electric auxiliary heating device to be turned off. The control unit is further configured to, 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, then, in conjunction 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 fan speed of the indoor fan, control the two or more sets of electric heating components to operate in stages, so as to control all or part of the two or more sets of electric heating components in the electric auxiliary heating device to operate.

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

9. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the air conditioning 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 the processor, it implements the steps of the air conditioning control method according to any one of claims 1 to 6.

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