CN113639334A

CN113639334A - Electric heating device, equipment, air conditioner, control method and storage medium

Info

Publication number: CN113639334A
Application number: CN202110902473.0A
Authority: CN
Inventors: 李松; 梁卓文; 朱华; 黄招彬; 李超雄; 张海强; 韩秋菊; 周宏明; 苑骏; 王文江; 张汉平
Original assignee: GD Midea Air Conditioning Equipment Co Ltd; Foshan Shunde Midea Electric Science and Technology Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Foshan Shunde Midea Electric Science and Technology Co Ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2021-11-12

Abstract

The application discloses an electric heating device, equipment, an air conditioner, a control method and a storage medium. The electric heating device includes: a ceramic PTC heating element; at least two first conductive electrodes arranged on the first surface of the ceramic PTC heating component; the second conductive electrode is arranged on the second surface of the ceramic PTC heating component; the second surface is opposite to the first surface, the first conductive electrodes are arranged in an insulating mode, and the ceramic PTC heating assembly is controlled to be electrically heated based on the fact that the at least one first conductive electrode and the second conductive electrode are connected to a power supply. According to the embodiment of the application, the power of the electric heating device can be adjusted according to different power-on states of the first conductive electrodes on the first surface, so that the requirement of more accurate temperature control can be met, and the heating effect of the electric heating device can be effectively improved; in addition, the electric heating device can realize power regulation on a single ceramic PTC heating component, and is beneficial to saving materials and processing cost.

Description

Electric heating device, equipment, air conditioner, control method and storage medium

Technical Field

The present disclosure relates to heating, and more particularly to an electric heating device, an electric heating apparatus, an air conditioner, a control method of the electric heating device, and a storage medium.

Background

In the field of temperature regulation, it is often necessary to use an electric heater to regulate the temperature. For example, in order to improve the heating capacity of the air conditioner, an electric auxiliary heating function may be added to the indoor unit of the air conditioner, so that the overall heating capacity of the air conditioner may be improved when the outdoor ambient temperature is low or the compressor heating capacity is low.

In the related art, the electric heater includes a metal tubular electric heater, a metal PTC (Positive Temperature Coefficient) electric heater, a ceramic PTC electric heater, and the like. Because the ceramic PTC has the characteristic of self-limiting temperature, the surface temperature of the ceramic PTC electrical heating is not very high (generally lower than 260 ℃) even under the extreme condition of no wind blowing, and compared with the surface temperature which is higher than 400 ℃ when the metal tubular electrical heating and the metal PTC electrical heating are not blown, the ceramic PTC electrical heating is much safer and widely applied.

The power of the existing ceramic PTC electric heating device is often constant, the influence on the air outlet temperature of the air conditioner is large when the ceramic PTC electric heating device is opened and closed, and a user can obviously feel that the air outlet temperature is unstable, and the air outlet temperature is suddenly cooled and suddenly heated, so that the user experience is influenced.

Disclosure of Invention

In view of this, embodiments of the present application provide an electric heating device, an apparatus, an air conditioner, a control method and a storage medium, which aim to effectively improve the heating effect of the electric heating device.

The technical scheme of the embodiment of the application is realized as follows:

in a first aspect, an embodiment of the present application provides an electric heating apparatus, including:

a ceramic PTC heating element;

at least two first conductive electrodes disposed on a first surface of the ceramic PTC heating element;

the second conductive electrode is arranged on the second surface of the ceramic PTC heating component;

the second surface is opposite to the first surface, the first conductive electrodes are arranged in an insulating mode, and the ceramic PTC heating assembly is controlled to be electrically heated based on the fact that at least one first conductive electrode and at least one second conductive electrode are connected to a power supply.

In some embodiments, there is an insulating gap between two adjacent first conductive electrodes disposed on the first face.

In some embodiments, the insulation gap is filled with an insulating material.

In some embodiments, a projection of each of the first conductive electrodes on the second face falls within a region in which the second conductive electrode is located.

In some embodiments, the electrical heating apparatus further comprises:

the insulating piece wraps the ceramic PTC heating assembly, the at least two first conductive electrodes and the second conductive electrode;

and each of the first conductive electrode and the second conductive electrode is respectively provided with a power supply terminal led out to the outside of the insulating part.

In some embodiments, the electrical heating apparatus further comprises:

and the heat dissipation part is connected with the insulation part and used for increasing the heat dissipation action area.

In some embodiments, the electrical heating apparatus further comprises:

and the protection shell is arranged between the insulating piece and the radiating piece and used for protecting the insulating piece and conducting the heat transferred by the insulating piece to the radiating piece.

In a second aspect, an embodiment of the present application provides an electric heating apparatus, including the electric heating device of the first aspect, the electric heating apparatus further includes:

a temperature sensor for detecting an ambient temperature;

the controller is connected with the temperature sensor and used for generating a control instruction based on the environment temperature;

and the action switch is connected with the controller and used for controlling the conduction state between each first conductive electrode in the electric heating device and the power supply based on the control instruction.

In some embodiments, the electrical heating apparatus further comprises:

and the fan is arranged opposite to the electric heating device.

In a third aspect, an embodiment of the present application provides an air conditioner, including the electric heating apparatus according to the embodiment of the present application.

In a fourth aspect, an embodiment of the present application provides a control method of an air conditioner, including:

acquiring the return air temperature of the air conditioner in a heating mode;

comparing the difference value between the return air temperature and the current set temperature with a plurality of preset threshold values;

and controlling the conduction state between each first conductive electrode in the electric heating device and a power supply based on the comparison result.

In some embodiments, the electrical heating device comprises two of the first electrically conductive electrodes, wherein one of the first electrically conductive electrodes has a larger area than the other of the first electrically conductive electrodes; the controlling the conducting state between each first conductive electrode in the electric heating device and the power supply based on the comparison result comprises:

if the difference value is larger than a first threshold value, controlling the two first conductive electrodes to be conducted with a power supply;

if the difference is smaller than or equal to the first threshold and larger than a second threshold, controlling the first conductive electrode with larger area to be conducted with a power supply;

if the difference value is smaller than or equal to the second threshold value and larger than a third threshold value, controlling the first conductive electrode with the smaller area to be conducted with a power supply;

if the difference is smaller than or equal to the third threshold and larger than a fourth threshold, returning the difference based on the return air temperature and the current set temperature to compare with a plurality of preset thresholds;

if the difference value is smaller than or equal to the fourth threshold value, controlling the two first conductive electrodes to be disconnected from a power supply;

wherein the first threshold > the second threshold > the third threshold > the fourth threshold.

In some embodiments, after the controlling both of the first conductive electrodes to disconnect the power supply, the method further comprises:

and obtaining the current working mode of the air conditioner, and returning to compare the difference value based on the return air temperature and the current set temperature with a plurality of preset threshold values when the current working mode is determined to be the heating mode.

In a fifth aspect, an embodiment of the present application provides an air conditioner, including the electric heating apparatus according to the embodiment of the present application, the air conditioner further includes: a processor and a memory for storing a computer program capable of running on the processor, wherein the processor, when running the computer program, is configured to perform the steps of the method according to an embodiment of the present application.

In a sixth aspect, the present application provides a storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps of the method of the present application are implemented.

According to the technical scheme, the first surface of the ceramic PTC heating assembly is provided with at least two first conductive electrodes, the second surface opposite to the first surface on the ceramic PTC heating assembly is provided with the second conductive electrode, the first conductive electrodes are arranged in an insulating mode, and the ceramic PTC heating assembly is controlled to be electrically heated based on the fact that the at least one first conductive electrode and the second conductive electrode are connected into the power supply. The power of the electric heating device can be adjusted according to different electrification states of the first conductive electrodes on the first surface, so that the requirement of more accurate temperature control can be met, and the heating effect of the electric heating device can be effectively improved; in addition, the electric heating device can realize power regulation on a single ceramic PTC heating component, and is beneficial to saving materials and processing cost.

Drawings

Fig. 1 is a schematic overall structure diagram of an electric heating apparatus according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of an electric heating apparatus according to an embodiment of the present application;

FIG. 3 is an exploded view of an electrical heating apparatus according to an embodiment of the present application;

FIG. 4 is a schematic view of the relative positions of the conductive electrode and the ceramic PTC heating element in an embodiment of the present application;

FIG. 5 is a schematic view of an insulation gap between first conductive electrodes in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of an electric heating apparatus according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an electrical circuit configuration of an electrical heating apparatus in an exemplary application;

FIG. 8 is a schematic diagram of the relative positions of a fan and an electric heater in an application example;

FIG. 9 is a flow chart illustrating a control method of an air conditioner according to an embodiment of the present invention;

FIG. 10 is a flow chart illustrating a method for controlling an air conditioner according to an exemplary embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of an air conditioner according to an embodiment of the present application.

Description of reference numerals:

100. an electric heating device; 101. a ceramic PTC heating element;

102. a first conductive electrode; 103. a second conductive electrode;

l, an insulation gap; 104. an insulating member; 105. a protective housing; 106. a heat sink;

201. a temperature sensor; 202. a controller;

203. an action switch; 204. a display unit; 205. a power supply unit;

206. a fan; 201A, a return air temperature detection probe; 201B, an air outlet temperature detection probe;

1100. an air conditioner; 1101. a processor; 1102. a memory;

1103. a user interface; 1104. a bus system.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Where in the description of the present application reference has been made to the terms "first", "second", etc. merely to distinguish between similar items and not to indicate a particular ordering for the items, it is to be understood that "first", "second", etc. may be interchanged with respect to a particular order or sequence of events to enable embodiments of the application described herein to be performed in an order other than that illustrated or described herein. Unless otherwise indicated, "plurality" means at least two.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The embodiment of the present application provides an electric heating apparatus 100, as shown in fig. 1 to 4, the electric heating apparatus 100 includes: a ceramic PTC heating element 101, at least two first conductive electrodes 102 and a second conductive electrode 103; at least two first conductive electrodes 102 are disposed on a first surface of the ceramic PTC heating element 101; the second conductive electrode 103 is arranged on the second surface of the ceramic PTC heating element 101; the second surface is opposite to the first surface, the first conductive electrodes 102 are arranged in an insulating mode, and the ceramic PTC heating assembly 101 is controlled to be electrically heated based on the fact that at least one first conductive electrode 102 and at least one second conductive electrode 103 are connected to a power supply.

Here, the ceramic PTC heating element 101 has a small resistance at normal temperature, but when the resistance value enters a jump region due to self-heating temperature rise after power-up, that is, when the resistance value exceeds a certain temperature (curie temperature), the resistance value of the ceramic PTC heating element 101 increases stepwise with the temperature rise, and the resistance value increases as the temperature increases, so that the ceramic PTC heating element has a self-temperature-limiting characteristic, and can be regarded as a constant temperature heating element, and the maximum electrically-heated surface temperature of the ceramic PTC heating element is constant. The ceramic PTC heating element 101 may be formed by sintering a plurality of ceramic PTC sheets, which is not particularly limited in the embodiments of the present application.

It can be understood that, in the embodiment of the present application, by providing at least two first conductive electrodes 102 on the first surface of the ceramic PTC heating element 101, the power of the electric heating device 100 can be adjusted according to the difference of the power-on states of the first conductive electrodes 102 on the first surface, so that the requirement of more precise temperature control can be met, and the heating effect of the electric heating device 100 can be effectively improved; in addition, the electric heating device 100 can realize power regulation on a single ceramic PTC heating element 101, which is beneficial to saving materials and processing cost.

It should be noted that, in the related art, the first surface and the second surface of the ceramic PTC heating element 101 are respectively provided with a conductive electrode, so that the heating power of the ceramic PTC heating element 101 is constant, if the heating power needs to be adjusted, a plurality of groups of ceramic PTC heating elements 101 are often required to be provided, and the adjustment of the heating power of the heating device is realized based on the control of the power-on state of each group of ceramic PTC heating elements 101.

As the number of the ceramic PTC heating elements 101 is increased, the cost is increased in the processes of wiring, production, manufacturing, assembly and the like; in addition, part of safety certification also requires that each group of ceramic PTC heating assemblies 101 which are independently powered needs an independent hardware temperature limiter for electrical heating, thereby further increasing the hardware cost. In the embodiment of the application, at least two first conductive electrodes 102 are arranged on the first surface of the ceramic PTC heating component 101, and the heat source is relatively concentrated, so that only one group of hardware temperature limiter is used, and the material cost and the assembly cost can be saved. In addition, by arranging at least two first conductive electrodes 102 on the first surface, the purpose of adjusting the heating power can be achieved under the condition of minor process change, the production process is greatly simplified, and the application range of the heating device is expanded.

Illustratively, as shown in fig. 5, there is an insulating gap L between two adjacent first conductive electrodes 102 disposed on the first face. The insulation gap L may be greater than 2.5mm (millimeters), for example, may be 3 mm. Illustratively, the insulating gap L may be filled with an insulating material, for example, an insulating silicon gel, which is beneficial to ensure the insulating property between the first conductive electrodes 102.

Illustratively, each first conductive electrode 102 is closely connected with the first surface of the ceramic PTC heating element 101 with low resistance, and can conduct electricity well; the second conductive electrode 103 is closely connected with the second surface of the ceramic PTC heating element 101 with low resistance, and can conduct electricity well. It is understood that each first conductive electrode 102 can be connected to one pole (e.g., positive pole) of a power supply, and the second conductive electrode 103 can be connected to the other pole (e.g., negative pole) of the power supply, and since the first conductive electrode 102 and the second conductive electrode 103 are both electrically connected to the ceramic PTC heating element 101, a power supply voltage can be formed between the first surface and the second surface of the ceramic PTC heating element 101, so as to achieve electrical heating.

Illustratively, the first conductive electrode 102 and the second conductive electrode 103 may be tightly connected to the surface of the ceramic PTC heating element 101 through a hot pressing or other process, so as to reduce the contact resistance and effectively ensure the conductive function. The first conductive electrode 102 and the second conductive electrode 103 may be made of a metal having a good conductive function, such as copper.

Illustratively, as shown in fig. 4, the projection of each first conductive electrode 102 on the second surface falls within the area of the second conductive electrode 103. It can be understood that, by adjusting the conductive state of each first conductive electrode 102, the control of the region forming the power supply voltage between the first surface and the second surface of the ceramic PTC heating element 101 can be realized, and thus the adjustment of the heating power of the ceramic PTC heating element 101 can be realized.

Illustratively, the electric heating apparatus 100 may further include: an insulating member 104 wrapping the ceramic PTC heating element 101, the at least two first conductive electrodes 102 and the second conductive electrode 103; each of the first conductive electrode 102 and the second conductive electrode 103 is provided with a power supply terminal led out to the outside of the insulating member 104.

As shown in fig. 3, the insulating member 104 may be a square insulating sleeve, and is wrapped outside the ceramic PTC heating element 101, the first conductive electrode 102 and the second conductive electrode 103 to perform an insulating protection function, and in addition, the insulating member 104 also performs a heat conduction function.

Illustratively, the electric heating apparatus 100 may further include: and a heat sink 106 connected to the insulator 104 for increasing a heat dissipation effect area.

The heat dissipation member 106 may increase the heat dissipation area of the electric heating apparatus 100, and may be a heat dissipation fin formed by connecting an aluminum sheet and an aluminum frame.

Illustratively, the electric heating apparatus 100 further includes: and a protective case 105 disposed between the insulator 104 and the heat sink 106, for protecting the insulator 104 and conducting heat transferred from the insulator 104 to the heat sink 106.

In an application example, after the ceramic PTC heating element 101 is tightly and firmly connected to the first conductive electrode 102 and the second conductive electrode 103, a high temperature resistant insulating member 104 is sleeved on the outer surface to perform an insulating protection function, for example, a polyimide tape may be used as the insulating member 104. The assembly of each conductive electrode with the ceramic PTC heating element 101 and the encased insulating member 104 may be referred to as a PTC heating core. The first conductive electrode 102 and the second conductive electrode 103 are respectively led out to be connected with a power supply terminal of a power supply. The outer surface of the PTC heating core body is sleeved with a protective shell body 105, the protective shell body 105 can be an aluminum pipe with a rectangular cross section, openings at two ends are removed, other places are sealed, and then shaping equipment is placed into the protective shell body to extrude, so that the protective shell body 105 is in close contact with the PTC heating core body, thermal resistance is reduced, and heat dissipation is facilitated.

Illustratively, in order to enhance the heat conduction performance, the protective casing 105 and the heat sink 106 are bonded by using a thermally conductive silicone adhesive.

An embodiment of the present application further provides an electric heating apparatus, as shown in fig. 6, including the foregoing electric heating device 100, the electric heating apparatus further includes: a temperature sensor 201, a controller 202 and an operation switch 203. The temperature sensor 201 is used for detecting the ambient temperature; the controller 202 is connected with the temperature sensor 201 and used for generating a control instruction based on the ambient temperature; the action switch 203 is connected to the controller 202, and is used for controlling the conducting state between each first conductive electrode 102 and the power supply in the electric heating apparatus 100 based on the control instruction.

It is understood that the controller 202 receives the ambient temperature detected by the temperature sensor 201, generates a control command based on the ambient temperature, and the action switch 203 controls the energization state of each first conductive electrode 102 based on the control command, thereby controlling the heating power of the electric heating apparatus 100.

Illustratively, the action switch 203 may be a relay corresponding to the power supply line of each first conductive electrode 102. As shown in fig. 8, the output port of the controller 202 is connected to the coil of the relay K1 and the coil of the relay K2, and the branches where the two first conductive electrodes 102 are located are respectively provided with the contact of the relay K1 and the contact of the relay K2, so that the controller 202 can turn on the relay K1, the relay K2 or the relay K1 and the relay K2 based on the generated control command, thereby adjusting the heating power of the electric heating apparatus 100.

For example, a hardware temperature limiter may be further disposed on the power supply line of the electric heating device 100, as shown in fig. 8, a first temperature limit switch S1 and a second temperature limit switch S2 may be connected in series on the live line L, wherein an operating temperature corresponding to the first temperature limit switch S1 is lower than that of the second temperature limit switch S2, the first temperature limit switch S1 has a self-reset function, and the second temperature limit switch S2 needs to be manually reset. It can be understood that when the ambient temperature is greater than the operating temperature corresponding to the first temperature limit switch S1, the first temperature limit switch S1 is turned off, and when the ambient temperature falls to less than or equal to the operating temperature corresponding to the first temperature limit switch S1, the first temperature limit switch S1 is turned on again, thereby effectively preventing overheating. When the ambient temperature is higher than the action temperature corresponding to the second temperature limit switch S2, the second temperature limit switch S1 is turned off, and at the moment, after manual troubleshooting is needed, manual resetting is carried out, so that the safety requirement of the heating environment is met.

Illustratively, the electric heating device may further include a display unit 204, and the display unit 204 is connected to the controller 202 for displaying information such as operating parameters, fault parameters, etc. of the electric heating device, for example, current operating parameters such as heating power, ambient temperature, etc. may be displayed.

Illustratively, the electric heating apparatus may further comprise a power supply unit 205, and the power supply unit 205 may supply power to the components of the electric heating apparatus, for example, the aforementioned controller 202, temperature sensor 201, motion switch 203, display unit 204, and the like.

Exemplarily, as shown in fig. 9, the electric heating apparatus further includes: and a fan 206 disposed opposite to the electric heating apparatus 100. It will be appreciated that the fan 206 may utilize the airflow to accelerate heat transfer and thereby provide temperature regulation for a larger space. Accordingly, the temperature sensor 201 may include: return air temperature detecting probe 201A and/or outlet air temperature detecting probe 201B. The return air temperature detection probe 201A is used for detecting the ambient temperature at the return air inlet of the fan 206, and the outlet air temperature detection probe 201B is used for detecting the ambient temperature at the outlet of the fan 206.

It is understood that the electric heating device may be various electronic devices with temperature regulation requirements, for example, an electric oven, an end table with electric heating function, an electric baking table, and the like, which are not limited in this application.

The embodiment of the application also provides an air conditioner, which comprises the electric heating device 100 of the embodiment of the application. It can be understood that the air conditioner can realize electric auxiliary heating based on the electric heating effect of the electric heating device 100, so that the overall heating capacity of the air conditioner can be improved under the condition that the outdoor environment temperature is low or the heating capacity of the compressor is low.

An embodiment of the present application further provides a control method of an air conditioner, where the air conditioner includes the electric heating apparatus 100 of the embodiment of the present application, and as shown in fig. 9, the control method includes:

and step 901, acquiring the return air temperature of the air conditioner in the heating mode.

It will be appreciated that in the heating mode, there may be a need for electrical auxiliary heating in the air conditioner. Whether the demand of electric auxiliary heat exists can be judged based on the comparison between the acquired return air temperature of the air conditioner and the current set temperature. The return air temperature is relative to the outlet air temperature of the air conditioner, namely the ambient temperature corresponding to the return air inlet of the air conditioner.

And step 902, comparing the difference between the return air temperature and the current set temperature with a plurality of preset threshold values.

Here, the air conditioner may determine the current set temperature based on an instruction of a user, and the air conditioner may previously store a plurality of threshold values, each of which may divide the aforementioned difference value into a plurality of sections as a basis for determining the heating power of the electric heating apparatus 100.

And 903, controlling the conduction state between each first conductive electrode in the electric heating device and the power supply based on the comparison result.

Here, the air conditioner may determine the heating power of the electric heating apparatus 100 based on the section in which the difference between the return air temperature and the current set temperature falls, and may realize the adjustment of the heating power by controlling the power supply and energization state of each of the first conductive electrodes 102 in the electric heating apparatus 100.

Illustratively, the electric heating apparatus 100 includes two first conductive electrodes 102, wherein one first conductive electrode 102 has a larger area than the other first conductive electrode 102; controlling the conducting state between each first conductive electrode 102 and the power supply in the electric heating device 100 based on the comparison result includes:

if the difference is greater than the first threshold, controlling the two first conductive electrodes 102 to be conducted with the power supply;

if the difference is smaller than or equal to the first threshold and larger than the second threshold, the first conductive electrode 102 with a larger control area is connected with the power supply;

if the difference is smaller than or equal to the second threshold and larger than the third threshold, the first conductive electrode 102 with the smaller area is controlled to be connected with the power supply;

if the difference is smaller than or equal to the third threshold and larger than the fourth threshold, comparing the difference based on the return air temperature and the current set temperature with a plurality of preset thresholds;

if the difference is less than or equal to the fourth threshold, controlling both the two first conductive electrodes 102 to cut off the power supply;

It can be understood that, based on the above control strategy, the electric auxiliary heating function of the air conditioner can be intelligently adjusted according to the ambient temperature, so that the more accurate temperature control requirement can be realized, the heating effect of the electric heating device 100 can be effectively improved, the heating temperature is prevented from generating larger fluctuation, and the improvement of the user experience is facilitated.

Illustratively, after controlling both first conductive electrodes 102 to disconnect the power supply, the method further comprises:

and acquiring the current working mode of the air conditioner, and returning to compare the difference between the return air temperature and the current set temperature with a plurality of preset thresholds when the current working mode is determined to be the heating mode.

It can be understood that after the two first conductive electrodes 102 of the electric heating device 100 are both powered off, the air conditioner needs to determine whether the electric auxiliary heating function needs to be turned on based on the current operating mode, if so, the return is performed based on the difference between the return air temperature and the current set temperature and comparing the difference with a plurality of preset thresholds, and if not, the control of the electric auxiliary heating can be exited.

The following describes an example of a control method of an air conditioner in conjunction with an application example.

In this application example, the electric heating apparatus 100 of the air conditioner includes two first conductive electrodes 102, and the width of one first conductive electrode 102 is larger than that of the other conductive electrode, and accordingly, the heating power of the electric heating apparatus 100 has three steps of 300W (watt), 600W and 900W.

As shown in fig. 10, the control method of the air conditioner of the present application example includes:

step 1001, the air conditioner is started and obtains an operation mode of the air conditioner.

Here, the air conditioner may be started based on an instruction of a user and acquires an operation mode of the air conditioner. Here, the operation mode of the air conditioner has indication information indicating whether to turn on the electric auxiliary heating function, for example, has an identification bit for indicating whether to turn on the electric auxiliary heating function.

Step 1002, determining whether the electric auxiliary heating function needs to be turned on, if so, executing step 1003.

It can be understood that the air conditioner determines that the electric auxiliary heating function needs to be turned on according to the identification position, and executes step 1003 to control the electric auxiliary heating function, and in other modes, the electric auxiliary heating function does not need to be turned on.

And step 1003, acquiring the return air temperature T1, the outlet air temperature T2 and the user set temperature T3.

Here, the air conditioner may acquire the return air temperature T1 and the outlet air temperature T2 based on the temperature sensor 201, and the air conditioner may determine the user set temperature T3 based on a user's instruction.

Step 1004, judging whether T3-T1 is more than n1, if yes, executing step 1005; if not, go to step 1006.

Here, the air conditioner obtains a difference T3-T1 based on the return air temperature T1 and the user set temperature T3, compares the difference T3-T1 with a first threshold n1, performs step 1005 if T3-T1 > n1, and performs step 1006 if T3-T1 ≦ n 1.

Step 1005, controlling the two first conductive electrodes to be conducted with the power supply, and returning to step 1003.

It can be understood that the heating device of the air conditioner is operated at a 900W step. The air conditioner may return to step 1003 based on the set time period corresponding to the heating period to re-determine the gear of the heating power of the heating device.

Step 1006, judging whether n1 is more than or equal to T3-T1 is more than n2, if yes, executing step 1007; if not, go to step 1008.

Here, the air conditioner further compares the difference T3-T1 with a second threshold n2, if n1 ≧ T3-T1 > n2, step 1007 is executed, and if T3-T1 ≦ n2, step 1008 is executed.

Step 1007, turning on the power supply for the first conductive electrode with larger control area, and returning to step 1003.

It can be understood that the heating device of the air conditioner is operated at a 600W step. The air conditioner may return to step 1003 based on the set time period corresponding to the heating period to re-determine the gear of the heating power of the heating device.

Step 1008, judging whether n2 is more than or equal to T3-T1 and more than n3, if yes, executing step 1009; if not, go to step 1010.

Here, the air conditioner further compares the difference T3-T1 with a second threshold n3, if n2 ≧ T3-T1 > n3, step 1009 is executed, and if T3-T1 ≦ n3, step 1010 is executed.

In step 1009, the first conductive electrode with a smaller control area is turned on to supply power, and the process returns to step 1003.

It can be understood that the heating device of the air conditioner is operated at a 300W step. The air conditioner may return to step 1003 based on the set time period corresponding to the heating period to re-determine the gear of the heating power of the heating device.

Step 1010, judging whether n3 is more than or equal to T3-T1 and more than n4, if so, returning to step 1003; if not, go to step 1011.

Here, the air conditioner further compares the difference T3-T1 with a fourth threshold n4, and if n3 ≧ T3-T1 > n4, the heating device of the air conditioner temporarily does not heat, and may return to step 1003 after waiting for a set time period to re-determine the gear of the heating power of the heating device.

And step 1011, controlling the two first conductive electrodes to be disconnected from the power supply, and returning to the step 1002.

It is understood that when the return air temperature T1 is close to the user set temperature, the power supply of the heating device of the air conditioner may be cut off, and the process returns to step 1002 to determine whether the electric auxiliary heating function needs to be turned on.

It is understood that the first threshold n1, the second threshold n2, the third threshold n3 and the fourth threshold n4 can be reasonably determined according to experimental data. By way of illustrative and non-limiting example, the first threshold n1 is 6.5, the second threshold n2 is 4.5, the third threshold n3 is 2.5, and the fourth threshold n4 is 0.5.

As can be known from the above description, the control method of the application example can generate a control instruction for controlling the power supply state of each first conductive electrode 102 of the electric heating device 100 based on the ambient temperature, and further switch the gear of the heating power of the heating device of the air conditioner, so as to implement a more accurate temperature control requirement, effectively improve the heating effect of the electric heating device 100, avoid a large fluctuation of the heating temperature, and facilitate improvement of user experience.

For example, the control of the existing PTC heating device is on-off control, which has a large influence on the air outlet temperature of the air conditioner when the PTC heating device is turned on and off, and a user can obviously feel that the air outlet temperature is unstable, suddenly cool and suddenly hot, and is uncomfortable. For example, for one hanging machine (air volume 500 m)³And h, the heating power of the PTC heating device is 900W), the PTC heating device is started, the air outlet temperature rises by about 5 ℃, the PTC heating device is closed, and the air outlet temperature is reduced by 5 ℃, so that the user can feel easily. The electric heating device 100 provided by the embodiment of the application has three gears of 300W, 600W and 900W, and based on the control method, more accurate temperature control can be realized, and the improvement of user experience is facilitated.

It should be noted that the division of the power gears is only an example, and does not constitute a limiting description of the embodiments of the present application.

In order to realize the method of the embodiment of the application, the embodiment of the application also provides an air conditioner. Fig. 11 shows only an exemplary structure of the air conditioner, not the entire structure, and a part or the entire structure shown in fig. 11 may be implemented as necessary.

As shown in fig. 11, an air conditioner 1100 according to an embodiment of the present application includes: at least one processor 1101, memory 1102, and a user interface 1103. The various components in air conditioner 1100 are coupled together by a bus system 11011. It will be appreciated that the bus system 1104 is used to enable communications among the components. The bus system 1104 includes a power bus, a control bus, and a status signal bus in addition to the data bus. For clarity of illustration, however, the various buses are labeled in fig. 11 as bus system 11011.

The user interface 1103 may include, among other things, a display, a keyboard, a mouse, a trackball, a click wheel, keys, buttons, a touch pad, or a touch screen.

The memory 1102 in the embodiment of the present application is used to store various types of data to support the operation of the air conditioner. Examples of such data include: any computer program for operating on an air conditioner.

The control method of the air conditioner disclosed in the embodiment of the present application may be applied to the processor 1101, or may be implemented by the processor 1101. The processor 1101 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the control method of the air conditioner may be implemented by an integrated logic circuit of hardware or an instruction in the form of software in the processor 1101. The Processor 1101 described above may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 1101 may implement or perform the methods, steps and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the memory 1102, and the processor 1101 reads the information in the memory 1102, and completes the steps of the control method of the air conditioner provided in the embodiment of the present application in combination with hardware thereof.

In an exemplary embodiment, the air conditioner may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.

It will be appreciated that the memory 1102 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical disk, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory (DRmb Access), and Random Access Memory (DRAM). The memories described in the embodiments of the present application are intended to comprise, without being limited to, these and any other suitable types of memory.

In an exemplary embodiment, the present application further provides a storage medium, that is, a computer storage medium, which may be a computer readable storage medium, for example, including a memory 1102 storing a computer program, where the computer program is executable by a processor 1101 of an air conditioner to perform the steps of the method of the present application. The computer readable storage medium may be a ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface Memory, optical disk, or CD-ROM, among others.

It should be noted that: the technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electric heating device, comprising:

a ceramic PTC heating element;

2. Electrical heating device according to claim 1,

an insulation gap is formed between every two adjacent first conductive electrodes arranged on the first face.

3. Electrical heating device according to claim 2,

and the insulating gap is filled with an insulating material.

4. Electrical heating device according to claim 2,

the projection of each first conductive electrode on the second surface falls into the area where the second conductive electrode is located.

5. The electric heating apparatus as claimed in claim 1, further comprising:

6. The electric heating apparatus as claimed in claim 5, further comprising:

7. The electric heating apparatus as claimed in claim 6, further comprising:

8. An electric heating apparatus comprising an electric heating device according to any one of claims 1 to 7, the electric heating apparatus further comprising:

a temperature sensor for detecting an ambient temperature;

9. An electric heating apparatus according to claim 8, further comprising:

and the fan is arranged opposite to the electric heating device.

10. An air conditioner characterized by comprising an electric heating apparatus according to any one of claims 1 to 7.

11. A control method of an air conditioner according to claim 10, comprising:

acquiring the return air temperature of the air conditioner in a heating mode;

12. The control method of an air conditioner according to claim 11, wherein said electric heating means includes two of said first conductive electrodes, wherein one of said first conductive electrodes has a larger area than the other of said first conductive electrodes; the controlling the conducting state between each first conductive electrode in the electric heating device and the power supply based on the comparison result comprises:

13. The method for controlling an air conditioner according to claim 12, wherein after said controlling both of said first conductive electrodes to be disconnected from the power supply, said method further comprises:

14. An air conditioner characterized by comprising the electric heating apparatus according to any one of claims 1 to 7, the air conditioner further comprising: a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor, when executing the computer program, is adapted to perform the steps of the method of any of claims 11 to 13.

15. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the steps of the method of any one of claims 11 to 13.