阅读说明：本技术 一种变频空调杀菌方法及空调器 (Variable frequency air conditioner and sterilization method thereof ) 是由 付冬金 张树前 汪卫平 孙建良 于 2021-07-12 设计创作，主要内容包括：本发明涉及变频空调技术领域,具体涉及一种变频空调杀菌方法及空调器。所述的一种变频空调杀菌方法包括以下步骤：空调关机切换至杀菌功能,与此同时启动制热模式；在制热模式下,根据T-(内)的不同采取不同的压缩机调频操作以及风机调速操作以使空调内机处于杀菌状态,其中的T-(内)为空调内机换热器表面温度；若满足杀菌退出条件则退出杀菌功能。本发明的目的在于提供一种变频空调杀菌方法以消除各种依附于空调内机换热器上的细菌与病菌,维持空调内机洁净度及出风健康度。(The invention relates to the technical field of variable frequency air conditioners, in particular to a variable frequency air conditioner sterilization method and an air conditioner. Variable frequency air conditioner sterilization method bagThe method comprises the following steps: the air conditioner is switched to a sterilization function when being shut down, and meanwhile, a heating mode is started; in the heating mode, according to T Inner part Different compressor frequency modulation operation and fan speed regulation operation are adopted to enable the air conditioner internal unit to be in a sterilization state, wherein T Inner part The surface temperature of a heat exchanger of an air conditioner indoor unit; and if the sterilization quit condition is met, quitting the sterilization function. The invention aims to provide a variable frequency air conditioner sterilization method to eliminate various bacteria and germs attached to a heat exchanger of an air conditioner indoor unit and maintain the cleanliness and the air outlet health degree of the air conditioner indoor unit.)

1. The variable frequency air conditioner sterilization method is characterized by comprising the following steps:

the air conditioner is switched to a sterilization function when being shut down, and meanwhile, a heating mode is started;

in the heating mode, according to T_{Inner part}Different compressor frequency modulation operation and fan speed regulation operation are adopted to enable the air conditioner internal unit to be in a sterilization state, wherein T_{Inner part}The surface temperature of a heat exchanger of an air conditioner indoor unit;

and if the sterilization quit condition is met, quitting the sterilization function.

2. The variable frequency air conditioner sterilization method according to claim 1, wherein the sterilization is according to T_{Inner part}The method adopts different compressor frequency modulation operation and fan speed regulation operation to enable the air conditioner internal unit to be in a sterilization state, and comprises the following steps:

presetting a temperature parameter T which increases in sequence₁、T₂、T₃、T₄、T₅、T₆And T₇Which respectively represent: a first sterilization temperature threshold, a second sterilization temperature threshold, a third sterilization temperature threshold, a fourth sterilization temperature threshold, a fifth sterilization temperature threshold, a sixth sterilization temperature threshold and a seventh sterilization temperature threshold, wherein the third sterilization temperature threshold is an optimal sterilization temperature;

at T_{Inner part}＜T₃When the condition is met, controlling the compressor to adopt the frequency-increasing operation;

at T₃≤T_{Inner part}＜T₄When the condition is satisfied, the compressor is maintained to operate at the current frequency and T is counted_{Inner part}≥T₃The accumulated sterilization time t under the condition;

at T_{Inner part}≥T₄And when the condition is met, controlling the compressor to perform frequency reduction operation.

3. The sterilization method of claim 2, wherein the step of controlling the compressor to perform the frequency-reducing operation is performed according to different T_{Inner part}Selecting the slow frequency-reducing operation or the fast frequency-reducing operation of the compressor and not continuing to reduce when the frequency of the compressor is reduced to a preset frequency threshold value H.

4. The variable frequency air conditioner sterilization method according to claim 3, wherein the T is different_{Inner part}The step of selecting the slow down operation or the fast down operation of the compressor comprises:

judgment condition T_{Inner part}＜T₅Whether or not toIf yes, the compressor executes slow frequency reduction operation at a frequency reduction rate C; otherwise, the compressor performs fast down-conversion operation at a down-conversion rate D, where D > C, and C has a value range of: 0.25-0.5HZ/S, and the value range of D is 1-3 HZ/S.

5. The sterilization method of claim 4, wherein the fast down-conversion operation performed by the compressor at the down-conversion rate D further comprises the steps of:

judgment of T₆≤T_{Inner part}＜T₇If the current rotating speed is not lower than the first gear, controlling the outer fan to run at the current rotating speed;

judgment of T_{Inner part}≥T₇If the current rotating speed is not the same as the current rotating speed, controlling the outer fan to operate at two gears;

at time intervals t₁Repeating the judgment until the current rotating speed is reduced to a preset rotating speed threshold value V₁。

6. The inverter air conditioner sterilization method according to claim 2, wherein the step of controlling the compressor to perform the frequency-up operation comprises:

judgment condition T_{Inner part}＜T₂And if so, controlling the compressor to perform fast frequency increasing operation at an increasing frequency rate A, otherwise, controlling the compressor to perform slow frequency increasing operation at an increasing frequency rate B, wherein B is greater than A, and the value range of A is as follows: 1-3HZ/S, and the value range of B is 0.25-0.5 HZ/S.

7. The inverter air conditioner sterilization method according to claim 6, wherein the step of controlling the compressor to perform fast up-conversion operation at the up-conversion rate A further comprises the steps of: controlling the outer fan to rotate at the maximum speed V₇The inner fan is in a cold air prevention state when not in operation;

the step of controlling the compressor to perform the slow frequency-up operation at the frequency-up rate B further comprises the steps of: and controlling the inner fan to start and operate at a static pressure gear.

8. The variable frequency air conditioner sterilization method according to claim 1, wherein the sterilization exit condition is: the accumulated sterilization time t reaches a preset sterilization time threshold value F.

9. The air conditioner comprises at least one heat pump unit, wherein any heat pump unit comprises a compressor (1), an inner heat exchanger (6), a throttling device (5) and an outer heat exchanger (3) which are sequentially connected through refrigerant pipelines, an inner fan (8) is correspondingly arranged on the inner heat exchanger (6), and an outer fan (4) is correspondingly arranged on the outer heat exchanger (3).

10. The air conditioner according to claim 9, wherein the surface of the inner machine heat exchanger is coated with a nano silver coating.

Technical Field

The invention relates to the technical field of variable frequency air conditioners, in particular to a variable frequency air conditioner sterilization method and an air conditioner.

Background

The outbreak of new crown epidemic situation makes us to be more aware of the importance of family health. When the air conditioner is reused in season, in epidemic outbreak period, and in severe pollution period caused by indoor decoration, etc., dust and bacteria blown out by the air conditioner can become hidden dangers threatening the health of family members, and the existing air conditioner basically has no sterilization function.

Disclosure of Invention

One of the objectives of the present invention is to provide a method for sterilizing a variable frequency air conditioner to eliminate various bacteria and germs attached to a heat exchanger of an air conditioner indoor unit, and maintain cleanliness and air-out health of the air conditioner indoor unit.

The invention also aims to provide an air conditioner adopting the variable frequency air conditioner sterilization method.

In order to achieve the purpose, the invention adopts the following technical scheme:

a sterilization method for a variable frequency air conditioner comprises the following steps: the air conditioner is switched to a sterilization function when being shut down, and meanwhile, a heating mode is started; in the heating mode, according to T_{Inner part}Different compressor frequency modulation operation and fan speed regulation operation are adopted to enable the air conditioner internal unit to be in a sterilization state, wherein T_{Inner part}The surface temperature of a heat exchanger of an air conditioner indoor unit; and if the sterilization quit condition is met, quitting the sterilization function.

More specifically, said is according to T_{Inner part}The method adopts different compressor frequency modulation operation and fan speed regulation operation to enable the air conditioner internal unit to be in a sterilization state, and comprises the following steps: presetting a temperature parameter T which increases in sequence₁、T₂、T₃、T₄、T₅、T₆And T₇Which respectively represent: a first sterilization temperature threshold, a second sterilization temperature threshold, a third sterilization temperature threshold, a fourth sterilization temperature threshold, a fifth sterilization temperature threshold, a sixth sterilization temperature threshold and a seventh sterilization temperature threshold, wherein the third sterilization temperature threshold is an optimal sterilization temperature; at T_{Inner part}＜T₃When the condition is met, controlling the compressor to adopt the frequency-increasing operation; at T₃≤T_{Inner part}＜T₄When the condition is satisfied, the compressor is maintained to operate at the current frequency and T is counted_{Inner part}≥T₃The accumulated sterilization time t under the condition; at T_{Inner part}≥T₄And when the condition is met, controlling the compressor to perform frequency reduction operation.

Preferably, the step of controlling the compressor to perform the frequency-reducing operation is performed according to different T_{Inner part}Selecting the slow frequency-reducing operation or the fast frequency-reducing operation of the compressor and not continuing to reduce when the frequency of the compressor is reduced to a preset frequency threshold value H.

Preferably, said at least one T is different_{Inner part}The step of selecting the slow down operation or the fast down operation of the compressor comprises: judgment condition T_{Inner part}＜T₅If yes, the compressor executes slow frequency reduction operation at a frequency reduction rate C; otherwise, the compressor performs fast down-conversion operation at a down-conversion rate D, where D > C, and C has a value range of: 0.25-0.5HZ/S, and the value range of D is 1-3 HZ/S.

Preferably, the step of performing fast down-conversion operation by the compressor at the down-conversion rate D further comprises the steps of: judgment of T₆≤T_{Inner part}＜T₇If the current rotating speed is not lower than the first gear, controlling the outer fan to run at the current rotating speed; judgment of T_{Inner part}≥T₇If the current rotating speed is not the same as the current rotating speed, controlling the outer fan to operate at two gears; at time intervals t₁Repeating the judgment until the current rotating speed is reduced to a preset rotating speed threshold value V₁。

Preferably, the step of controlling the compressor to perform the frequency-up operation includes: judgment condition T_{Inner part}＜T₂Whether it is established, if so, controlling the compressionThe machine executes fast frequency increasing operation at the frequency increasing rate A, otherwise, the compressor is controlled to execute slow frequency increasing operation at the frequency increasing rate B, wherein B is larger than A, and the value range of A is as follows: 1-3HZ/S, and the value range of B is 0.25-0.5 HZ/S.

Preferably, the step of controlling the compressor to perform the fast frequency-up operation at the frequency-up rate a further comprises the steps of: controlling the outer fan to rotate at the maximum speed V₇The inner fan is in a cold air prevention state when not in operation; the step of controlling the compressor to perform the slow frequency-up operation at the frequency-up rate B further comprises the steps of: and controlling the inner fan to start and operate at a static pressure gear.

More specifically, the sterilization exit condition is as follows: the accumulated sterilization time t reaches a preset sterilization time threshold value F.

The application also provides an air conditioner, including an at least heat pump set, arbitrary heat pump set contains compressor, interior heat exchanger, throttling arrangement and outer machine heat exchanger that the refrigerant pipeline connects in order, and interior fan has been laid to interior heat exchanger correspondence, and outer machine heat exchanger has laid outer fan in correspondence, still contains the controller that adopts foretell variable frequency air conditioner sterilization method, temperature sensor has been laid at the interior heat exchanger middle part, temperature sensor and controller electric connection.

Preferably, the surface of the inner machine heat exchanger is coated with a nano silver coating.

The invention controls the running frequency of the compressor and the running speed of the inner fan and the outer fan according to the surface temperature of the heat exchanger of the air conditioner inner unit, thereby maintaining the air conditioner inner unit in a sterilization state until eliminating bacteria and germs attached to the heat exchanger of the air conditioner inner unit, further maintaining the cleanliness and the air outlet health degree of the air conditioner inner unit, effectively improving the indoor air quality, particularly the air quality under a closed space, and ensuring that the air conditioner has both comfort and safety.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a heat pump unit according to an embodiment of the present invention;

fig. 2 is a flowchart of a variable frequency air conditioner sterilization method according to an embodiment of the present invention.

Detailed Description

In order to make the technical features, objects and effects of the present invention more clearly understood, a detailed description of embodiments of the present invention will be given below with reference to the accompanying drawings.

It should be noted that the terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The invention provides an air conditioner, which comprises at least one heat pump unit, and is shown in figure 1 as a structural schematic diagram of the specific heat pump unit, and comprises a compressor 1, an inner heat exchanger 6, a throttling device 5 and an outer heat exchanger 3 which are sequentially connected by a refrigerant pipeline to form a loop, wherein an inner fan 8 is correspondingly arranged on the inner heat exchanger 6, an outer fan 4 is correspondingly arranged on the outer heat exchanger 3, and in a preferred embodiment, a four-way valve 2 is also arranged for realizing the forward and reverse circulation of the refrigerant and the switching of the air-conditioning refrigeration and heating modes. Preferably, the surface of the inner machine heat exchanger is coated with a nano silver coating for preventing bacteria and germs from breeding. The compressor is an inverter compressor; the outer fan is driven by a direct current motor.

The heat pump unit further comprises a controller, wherein the controller comprises a memory and a processor, the memory is used for storing a computer program, the processor is used for running the program, and the program runs to execute the steps of the variable frequency air conditioner sterilization method.

In order to dynamically acquire the surface temperature of the middle part of the heat exchanger of the indoor unit of the air conditioner, a sensor 7 is also arranged at the part, and the sensor 7 is electrically connected with the controller, specifically, the sensor can be a temperature sensor or a pressure sensor and acquires corresponding temperature data through a pressure-temperature comparison table.

The invention provides a variable frequency air conditioner sterilization method, which comprises the following steps:

s100, switching off the air conditioner to a sterilization function, and starting a heating mode at the same time;

the remote controller configured on the air conditioner is provided with a sterilization key, and a user can switch to a sterilization function through the sterilization key.

Step S200, presetting a temperature parameter T which is increased in sequence₁、T₂、T₃、T₄、T₅、T₆、T₇And a compressor frequency threshold H, the aforementioned temperature parameters respectively representing: a first sterilization temperature threshold, a second sterilization temperature threshold, a third sterilization temperature threshold, a fourth sterilization temperature threshold, a fifth sterilization temperature threshold, a sixth sterilization temperature threshold and a seventh sterilization temperature threshold, wherein the third sterilization temperature threshold is an optimal sterilization temperature;

the T is₁The value range of (A) is 47-53 ℃, and preferably 50 ℃; the T is₂The value range of (A) is 52-58 ℃, and preferably 55 ℃; the T is₃The value range of (A) is 55-61 ℃, and preferably 58 ℃; the T is₄The value range of (A) is 57-63 ℃, and preferably 60 ℃; the T is₅The value range of (A) is 60-64 ℃, and the optimal selection is 62 ℃; the T is₆The value range of (A) is 62-66 ℃, and preferably 64 ℃; the T is₇The value range of (A) is 64-68 ℃, and the preferred value is 66 ℃; the value range of H is 15-40HZ, and preferably 20 HZ.

It should be noted that, the air conditioner is provided with an operation panel for the user to set various parameters, and certainly, in order to reduce the burden of the user, various parameters may be built in before leaving the factory as default data, and the user may adjust the data or adopt system default data.

Step S300, at T_{Inner part}＜T₃And when the condition is met, controlling the compressor to adopt the frequency-increasing operation.

Step S310, judging condition T_{Inner part}＜T₁If yes, controlling the compressor to execute fast frequency raising operation at the frequency raising speed A, and simultaneously controlling the outer fan to rotate at the maximum rotating speed V₇And when the inner fan is not operated, the inner fan is in a cold air prevention state.

Wherein the rotating speed of the outer fan is seven levels, respectively V_1、V_2、V_3、V_4、V_5、V₆And V₇Said V is₁The value range of (A) is 180-250r/min, preferably 200 r/min; the V is₂The value range of (1) is 340-380r/min, preferably 360 r/min; the V is₃The value range of (a) is 440-480r/min, preferably 460 r/min; the V is₄The value range of (1) is 540-580r/min, preferably 550 r/min; the V is₅The value range of (b) is 640-680r/min, preferably 650 r/min; the V is₆The value range of (1) is 720-780r/min, preferably 750 r/min; the V is₇The value range of (b) is 830-880r/min, preferably 850 r/min.

The frequency raising rate A ranges from 1 HZ/S to 3 HZ/S.

The principle is explained as follows: in the step, the heat pump unit is at the initial sterilization control, the temperature of the middle part of the inner machine heat exchanger is lower, and at the moment, high pressure is quickly established through the quick frequency increasing operation of the compressor, so that the temperature of the inner machine heat exchanger is increased for high-temperature sterilization; and at the moment, the temperature of the heat exchanger of the inner fan is lower, and the inner fan adopts cold air prevention treatment to avoid cold air blowing of the air conditioner and influence on user experience.

Step S320, judging condition T₁≤T_{Inner part}＜T₂If yes, maintaining the compressor to perform fast frequency raising operation at the frequency raising rate AControlling the outer fan to rotate at the maximum speed V₇And (5) operating, and simultaneously controlling the inner fan to start and operate at a static pressure gear.

The principle is explained as follows: the temperature of the inner machine heat exchanger at this moment is higher, and the auxiliary inner fan is needed to blow low air to maintain the surface temperature of the inner machine heat exchanger, so that the sterilization effect is improved.

Step S330, judging condition T_{Inner part}≥T₂If yes, controlling the compressor to perform slow frequency raising operation at a frequency raising speed B, and simultaneously controlling the outer fan to rotate at a maximum rotating speed V₇And (4) operating the inner fan at a static pressure gear.

Wherein the frequency raising rate B ranges from 0.25 to 0.5 HZ/S.

The principle is explained as follows: because the internal machine heat exchanger is close to the optimal sterilization temperature at the moment, the reduction of the frequency rising rate of the compressor can prevent the damage of the compressor or the burst of an air conditioner pipeline caused by the overhigh system pressure caused by the overhigh frequency rising of the compressor.

Step S400, at T₃≤T_{Inner part}＜T₄When the condition is satisfied, the compressor is maintained to operate at the current frequency and T is counted_{Inner part}≥T₃The accumulated sterilization time t under the condition;

step S500, at T_{Inner part}≥T₄And when the condition is met, controlling the compressor to perform frequency reduction operation.

Step S510, judging condition T₄≤T_{Inner part}＜T₅And if so, controlling the compressor to perform slow frequency reduction operation at the frequency reduction rate C.

Wherein, the value range of the frequency reduction rate C is as follows: 0.25-0.5 HZ/S.

The principle is explained as follows: the temperature of the internal heat exchanger in the step is higher, which indicates that the pressure of the heat pump unit is higher, and in order to ensure the safety of the heat pump unit, the frequency of the compressor needs to be reduced so as to maintain the temperature of the internal heat exchanger in a better range.

Step S520, judging condition T₅≤T_{Inner part}＜T₆And if so, controlling the compressor to execute the fast frequency reduction operation at the frequency reduction rate D.

Wherein, the value range of the frequency reduction rate D is as follows: 1-3 HZ/S.

The principle is explained as follows: at this time, the pressure of the unit is still higher, and the safety of the unit needs to be ensured through the fast frequency reduction operation.

Step S521, judging T₆≤T_{Inner part}＜T₇If yes, maintaining the compressor to execute fast frequency reduction operation at the frequency reduction rate D and simultaneously controlling the outer fan to rotate at the current rotating speed V₇And reducing the first gear operation.

The principle is explained as follows: the step shows that the unit pressure continuously rises, and the unit pressure is quickly reduced by simultaneously reducing the rotating speed of the outer fan, so that the safety of the unit is maintained.

Step S522, judgment T_{Inner part}≥T₇If yes, maintaining the compressor to execute fast frequency reduction operation at the frequency reduction rate D and simultaneously controlling the outer fan to rotate at the current rotating speed V₆And reducing the operation of two gears.

The principle is explained as follows: this step indicates that the unit pressure is still rising, and to ensure system safety, the rotating speed of the external fan needs to be further reduced while the fast frequency reduction operation of the compressor is maintained.

Step S523, at time interval t₁Repeating the steps S520 to S522, and when the frequency of the compressor is reduced to the preset frequency threshold H, the compressor is not continuously reduced and the rotating speed of the outer fan is reduced to the preset rotating speed threshold V₁The speed is not reduced any more.

Wherein the time interval t₁The value range of (a) is 20-50S, preferably 30S; the value range of the frequency threshold H is 15-40HZ, and preferably 20 HZ.

In step S600, in the process from step S400 to step S523, if the sterilization quit condition is satisfied, the sterilization function is quitted.

Specifically, the sterilization exit condition is as follows: the accumulated sterilization time t reaches a preset sterilization time threshold F, wherein the value range of the sterilization time threshold F is 8-12min, and preferably 10 min.

The variable frequency air conditioner sterilization method provided by the invention has simple logic, and the operating frequency of the compressor and the operating speed of the inner fan and the outer fan are controlled by obtaining the surface temperature of the heat exchanger of the inner unit of the air conditioner, so that the inner unit of the air conditioner is maintained in a sterilization state until bacteria and germs attached to the heat exchanger of the inner unit of the air conditioner are eliminated, the cleanliness and the air outlet health degree of the inner unit of the air conditioner are further maintained, the air quality in a room, particularly in a closed space, can be effectively improved, and the air conditioner has comfort and safety.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, "controller", "processor", and the like may include hardware, software, or a combination of both. A module may comprise hardware circuitry, various suitable sensors, communication ports, memory, may comprise software components such as program code, or may be a combination of software and hardware. The processor may be a central processing unit, microprocessor, image processor, digital signal processor, or any other suitable processor. The processor has data and/or signal processing functionality. The processor may be implemented in software, hardware, or a combination thereof. The physical device to which the controller corresponds may be the processor itself, or a part of software, a part of hardware, or a part of a combination of software and hardware in the processor.