CN110186149B

CN110186149B - Operation control method, control device, air conditioner, and computer-readable storage medium

Info

Publication number: CN110186149B
Application number: CN201910472139.9A
Authority: CN
Inventors: 徐振坤; 蔡志昇; 杜顺开; 唐亚林
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2021-12-07
Anticipated expiration: 2039-05-31
Also published as: CN110186149A

Abstract

The invention provides an operation control method, an operation control device, an air conditioner and a computer readable storage medium, wherein the operation control method comprises the following steps: acquiring the exhaust temperature of the compressor, and detecting whether the exhaust temperature is abnormal; if the exhaust temperature is detected to be abnormal, controlling the opening degree of the throttling device to be increased so as to increase the refrigerant flow according to a first rate; the opening degree of the throttling device is increased to the first opening degree, and the exhaust temperature is collected again to detect whether the exhaust temperature is recovered to be normal or not; and if the exhaust temperature is still abnormal, continuously controlling and increasing the opening degree of the throttling device between the first opening degree and a preset second opening degree so as to increase the refrigerant flow according to a second rate, wherein the second rate is greater than the first rate. By the technical scheme of the invention, the abnormal temperature of the exhaust temperature can be eliminated without increasing the preparation cost of the air conditioner and influencing the normal use of a user.

Description

Operation control method, control device, air conditioner, and computer-readable storage medium

Technical Field

The invention relates to the technical field of air conditioners, in particular to an operation control method, an operation control device, an air conditioner and a computer readable storage medium.

Background

While the air conditioner may have many abnormal phenomena during operation, taking a compressor as an example, sometimes an abnormal exhaust temperature phenomenon occurs, and although there is a corresponding solution in the related art, the above solution usually needs to perform bypass unloading or direct shutdown, resulting in the following defects:

(1) bypass unloading can result in increased manufacturing costs;

(2) the shutdown affects the cooling or heating effect of the air conditioner.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, it is an object of the present invention to provide an operation control method.

Another object of the present invention is to provide an operation control device.

Another object of the present invention is to provide an air conditioner.

It is another object of the present invention to provide a computer-readable storage medium.

In order to achieve the above object, a technical solution of a first aspect of the present invention provides an operation control method, which is applied to an air conditioner, and includes: acquiring the exhaust temperature of a compressor, and detecting whether the exhaust temperature is abnormal; if the exhaust temperature is detected to be abnormal, controlling to increase the opening degree of the throttling device so as to increase the refrigerant flow according to a first rate; the opening degree of the throttling device is increased to a first opening degree, and the exhaust temperature is collected again to detect whether the exhaust temperature is recovered to be normal or not; and if the exhaust temperature is still abnormal, continuously controlling and increasing the opening degree of the throttling device between the first opening degree and a preset second opening degree so as to increase the refrigerant flow rate according to a second rate, wherein the second rate is greater than the first rate, and the ratio of the first refrigerant flow rate corresponding to the second opening degree to the second refrigerant flow rate corresponding to the first opening degree is greater than or equal to 3.34 and less than or equal to 100.

In the scheme, due to the fact that the exhaust temperature of the compressor can be abnormal due to factors such as high return air temperature, high condensing pressure and the like, whether the air conditioner system runs abnormally can be determined by collecting the exhaust temperature of the compressor and detecting whether the exhaust temperature is abnormal, after the exhaust temperature is determined to be abnormal, the running pressure of the air conditioner system is reduced by controlling and adjusting the opening of the throttling device, the temperature of a specified position is reduced, and normal running of the air conditioner is guaranteed.

Specifically, the opening degree of the throttling device is adjusted from the initial opening degree to at least two stages, the first stage is from the initial opening degree to the first opening degree, the second stage is from the first opening degree to the second opening degree, the flow rate of the first-stage refrigerant is increased at a first rate, the flow rate of the second-stage refrigerant is increased at a second rate, the second rate is greater than the first rate, and the ratio of the flow rate of the second-stage refrigerant to the flow rate of the first-stage refrigerant is [3.34, 100], on one hand, when the exhaust temperature abnormality cannot be solved or relieved after the flow rate of the refrigerant is increased at the first rate, the system pressure can be further reduced by the second rate to the opening degree of the throttling device, so that the normal operation of the compressor is ensured, on the other hand, compared with the solution of the related art for the exhaust temperature abnormality, a bypass for performing the unloading operation is not required to be separately arranged, so that the preparation cost is not increased, on the other hand, in comparison with the related art solution of the exhaust gas temperature abnormality, the shutdown operation need not be performed, and thus normal use by the user is not affected.

Wherein, as can be understood by those skilled in the art, when the opening degree of the throttling device is adjusted to increase the refrigerant flow rate at the first rate and the second rate respectively, the throttling device with a specified structure can be precisely controlled, for example, the flow area of the throttling device takes the first opening degree as a critical point, and the flow area of the refrigerant in the throttling device is continuously increased at the third rate corresponding to the first rate before reaching the first opening degree, so as to increase the refrigerant flow rate flowing through the throttling device, thereby reducing the pressure drop before and after the throttling device, and the sudden change occurs at the first opening degree, and the flow area of the refrigerant in the throttling device is continuously increased at the fourth rate corresponding to the second rate, thereby increasing the refrigerant flow rate flowing through the throttling device, further reducing the pressure drop before and after the throttling device, and improving the control mode of the opening degree step number, for example, after reaching the first opening degree, the amplitude of each opening degree is increased relative to that before the first opening degree, so as to realize the sudden change of the increase of the refrigerant flow rate with the first opening degree as a critical point.

It will also be appreciated by those skilled in the art that after defining the first rate and the second rate, an adjustment rate greater than the second rate may be further defined to further shorten the adjustment time of the restriction device.

In addition, the throttling device may be a throttling valve.

In the foregoing technical solution, optionally, a ratio between the first refrigerant flow rate and the second refrigerant flow rate is greater than or equal to 3.35 and less than or equal to 30.

In this embodiment, on the basis of limiting the ratio between the refrigerant flow rate corresponding to the second opening degree and the refrigerant flow rate corresponding to the first opening degree, the range to which the ratio belongs is further reduced, on one hand, the accuracy of control can be improved by increasing the lower threshold (from 3.34 to 3.35), and on the other hand, the difficulty of control is reduced by reducing the upper threshold (from 100 to 30).

In the foregoing technical solution, optionally, the operation control method further includes: controlling the compressor to perform a down-conversion operation.

In the scheme, if the exhaust temperature is judged to be abnormal, the throttling device is adjusted, the compressor is subjected to frequency reduction operation, specifically, the rotating speed of the compressor during operation is adjusted, the flow is changed through rotating speed adjustment, the compression ratio of the compressor is reduced, and further reduction of the exhaust temperature is realized.

In the foregoing technical solution, optionally, before the obtaining the exhaust temperature of the compressor and detecting whether the exhaust temperature is abnormal, the method further includes: and acquiring the opening degree of the throttling device, and determining the opening degree as an initial opening degree, wherein the initial opening degree is smaller than the first opening degree, the first opening degree is larger than or equal to 150 steps and smaller than or equal to 400 steps, so that the flow rate of the refrigerant is increased between the initial opening degree and the first opening degree according to the first speed, and the flow rate of the refrigerant is smaller than or equal to 8L/min under the initial opening degree.

In this embodiment, the initial opening is the opening of the throttle valve that controls the normal operation of the air conditioner in the related art, that is, the initial opening in the adjusting method of the throttle valve in this application, and satisfies the normal operation of the air conditioner by limiting the range of the initial opening, and further, by limiting the range of the first opening between steps [150, 400], a sufficient adjusting space can be provided for the first stage of the adjusting process (i.e., increasing the refrigerant flow at the first rate), and if the exhaust temperature abnormality can be eliminated when the first opening is reached, the subsequent adjusting operation may not be performed.

The opening value between the first opening degree and the initial opening degree is preferably a value in the middle of the above range.

Specifically, the throttle device can be adjusted at a first rate between the initial opening degree and the first opening degree by limiting the initial opening degree, the first opening degree and the second opening degree, and the throttle device can be adjusted at a second rate between the first opening degree and the second opening degree, wherein the initial opening degree can be understood as the minimum opening degree of the throttle device during operation to correspond to the minimum refrigerant flow rate, and further, the operation control scheme defined in the application can be applied to a situation (low-cost one-to-one) that the shut-down (for example, one-to-many) and the minimum opening degree have a certain flow rate.

The initial opening degree is smaller than the first opening degree, and the range of the initial opening degree may be specifically greater than 0 and smaller than 150 steps. During the normal operation of the air conditioner, the initial opening may be greater than 0 and less than or equal to 100 steps, so as to correspond to a refrigerant flow rate less than or equal to 8L/min.

In the foregoing technical solution, optionally, if the exhaust temperature is still abnormal, continuing to control to increase the opening degree of the throttling device between the first opening degree and a preset second opening degree so as to increase the refrigerant flow rate according to a second rate, specifically including: and continuously controlling the throttling device to adjust between the first opening degree and the second opening degree according to a preset amplification range, wherein the preset amplification range is greater than or equal to 50 steps and less than or equal to 350 steps.

In the scheme, if the refrigerant flow is controlled to increase at the second speed, the range of the increase of the opening degree of the throttling device is correspondingly controlled to be between [50 and 350], on one hand, the effective reduction of the overhigh exhaust temperature can be ensured by adjusting the throttling device in the range, and on the other hand, the negative influence on the performance of the air conditioner caused by the overhigh opening degree increase of the throttling device is also prevented.

In the foregoing technical solution, optionally, the first refrigerant flow rate is determined according to a rated heat exchange amount of the air conditioner.

In the scheme, the rated heat exchange quantity of the air conditioner corresponds to the target flow of the refrigerant in the air conditioner system, the first refrigerant flow is less than or equal to the target flow, and the requirement for solving the abnormal exhaust temperature can be met on the premise that the refrigerant flow is less than or equal to the target flow by limiting the target flow under the normal condition, wherein the target flow is determined according to the rated heat exchange quantity of the air conditioner, so that the normal operation of indoor refrigeration or heating is ensured while the problem of the abnormal exhaust temperature is solved, and the comfort level of a user for using the air conditioner can be further ensured.

Furthermore, the first refrigerant flow is further limited, and the second refrigerant flow can be determined by combining the limitation of the ratio range between the first refrigerant flow and the second refrigerant flow, so that the opening of the throttling device is controlled based on the first refrigerant flow and the second refrigerant flow.

The different air conditioner models have different heat exchange capacities, and the heat exchange capacity can be represented by a rated heat exchange amount, for example, the air conditioner is 35-grade, and the rated refrigerating capacity of the air conditioner is 3500W, which can also be called as 1.5 HP.

Specifically, in the cooling mode, the rated heat exchange amount is the rated cooling amount, for example, the rated cooling amount is 4500W or lower than 4500W, the corresponding target flow rate is 70L/min, and if the rated cooling amount is 4500W to 14000W, the corresponding target flow rate is 80L/min.

In the above technical solution, optionally, obtaining an exhaust temperature of the compressor, and detecting whether the exhaust temperature is abnormal specifically includes: detecting whether the exhaust temperature is greater than a first temperature threshold; and if the exhaust temperature is greater than the first temperature threshold value, determining that the exhaust temperature is abnormal.

In the scheme, as an expression mode of abnormal exhaust temperature, the exhaust temperature can be too high, if the exhaust temperature is too high, the power consumption of the compressor can be increased, the first temperature threshold value is preset to represent the maximum threshold value of the exhaust temperature in a normal range, and whether the exhaust temperature is abnormal or not is determined by comparing the collected exhaust temperature with the first temperature threshold value, so that when the exhaust temperature is determined to be abnormal, the throttling devices in the regulating system are controlled in different flow rate modes to reduce the exhaust temperature, and the normal operation power consumption of the compressor is ensured.

The first temperature threshold may be a specific value or a temperature range.

In the foregoing technical solution, optionally, the acquiring an exhaust temperature of the compressor and detecting whether the exhaust temperature is abnormal specifically includes: if the exhaust temperature is detected to be greater than or equal to a second temperature threshold value, continuously detecting the speed increase of the exhaust temperature; and if the speed increase of the exhaust temperature is larger than a speed increase threshold value, determining that the exhaust temperature is abnormal.

In the scheme, whether the exhaust temperature is abnormal or not can be detected by detecting the acceleration of the exhaust temperature, the detection mode can be realized based on a second temperature threshold and an acceleration threshold, the second temperature threshold is a larger temperature value in a normal exhaust temperature range, the acceleration threshold is a critical value for judging whether the exhaust temperature is increased too fast or not, if the exhaust temperature is detected to exceed the second temperature threshold, the temperature acceleration is larger than the acceleration threshold, the current abnormal operation of the air conditioner system is indicated, the exhaust temperature has the risk of exceeding the first temperature threshold, the abnormal exhaust temperature can be confirmed at the moment, and the throttling device in the regulating system is controlled in a mode of different flow rates to reduce the exhaust temperature, so that the normal operation power consumption of the compressor is ensured.

Wherein the second temperature threshold is lower than the first temperature threshold.

In the foregoing technical solution, optionally, the throttling device includes a valve seat and a valve needle that is controlled to reciprocate by excitation, the valve seat is provided with an orifice that is engaged with the valve needle to define a refrigerant flow area by the valve needle and the orifice, wherein, from the first opening degree to the first opening degree, the flow area increases according to a third rate, from the first opening degree, the flow area increases according to a fourth rate, and a ratio between the flow area corresponding to the second opening degree and the flow area corresponding to the first opening degree is the same as a ratio between a refrigerant flow rate corresponding to the second opening degree and a refrigerant flow rate corresponding to the first opening degree.

The third rate is an increase rate of a refrigerant flow area corresponding to the first rate, and the fourth rate is an increase rate of a refrigerant flow area corresponding to the second rate.

In this aspect, in order to realize that the refrigerant flow rate increases at the first rate when the throttle device is adjusted between the first opening degree and the first opening degree, and the refrigerant flow rate increases at the second rate when the throttle device is adjusted at or above the first opening degree, the flow area of the refrigerant defined between the throttle hole and the needle may be limited, that is, the flow area may increase at the third rate when the throttle device is adjusted between the first opening degree and the first opening degree, and the flow area may increase at the fourth rate when the throttle device is continuously adjusted based on the first opening degree, and the fourth rate/the third rate may be equal to the second rate/the first rate, and the refrigerant flow rate may be adjusted at different rates by adjusting the flow area.

In the above technical solution, optionally, the free end of the valve needle includes any one of a cone structure, a circular truncated cone structure and a convex arc surface structure; the structure of with free end connection is the round platform structure, the round platform structure is one or more, the generating line of round platform structure is constructed for sharp and/or pitch arc, the tapering of free end is greater than the tapering of round platform structure, wherein, if throttling arrangement's aperture increases to first aperture, then free end with the round platform structure is connected the face with the orifice is injectd flow area.

In this scheme, the needle that can realize above-mentioned speed regulation has multiple structural style, through the injecing to the needle structure, realizes the regulation to flow area when adjusting the aperture to satisfy the refrigerant flow and adjust through the regulation rate of difference when throttling arrangement is in different regulation intervals, and then can solve the unusual problem of exhaust temperature high-efficiently.

In the foregoing technical solution, optionally, if the exhaust temperature is still abnormal, continuing to control to increase the opening degree of the throttle device between the first opening degree and a preset second opening degree, specifically including: if the refrigerant flows in along the direction of the valve needle and flows out along the direction vertical to the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be less than or equal to 90 pps; and if the refrigerant flows in the direction vertical to the valve needle and flows out in the direction of the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be greater than or equal to 30 pps.

In the scheme, when the refrigerant is in different flow directions, the control requirement of the throttling device is met by controlling the excitation speed to be within a limited range.

A second aspect of the present invention provides an operation control device for an air conditioner, including: a processor capable of, when executing a computer program: acquiring the exhaust temperature of a compressor, and detecting whether the exhaust temperature is abnormal; if the exhaust temperature is detected to be abnormal, controlling to increase the opening degree of the throttling device so as to increase the refrigerant flow according to a first rate; the opening degree of the throttling device is increased to a first opening degree, and the exhaust temperature is collected again to detect whether the exhaust temperature is recovered to be normal or not; and if the exhaust temperature is still abnormal, continuously controlling and increasing the opening degree of the throttling device between the first opening degree and a preset second opening degree so as to increase the refrigerant flow rate according to a second rate, wherein the second rate is greater than the first rate, and the ratio of the first refrigerant flow rate corresponding to the second opening degree to the second refrigerant flow rate corresponding to the first opening degree is greater than or equal to 3.34 and less than or equal to 100.

In addition, the throttling device may be a throttling valve.

In the foregoing technical solution, optionally, the processor is specifically configured to: controlling the compressor to perform a down-conversion operation.

In the foregoing technical solution, optionally, the processor is specifically configured to: and acquiring the opening degree of the throttling device, and determining the opening degree as an initial opening degree, wherein the initial opening degree is smaller than the first opening degree, the first opening degree is larger than or equal to 150 steps and smaller than or equal to 400 steps, so that the flow rate of the refrigerant is increased between the initial opening degree and the first opening degree according to the first speed, and the flow rate of the refrigerant is smaller than or equal to 8L/min under the initial opening degree.

In the foregoing technical solution, optionally, the processor is specifically configured to: and continuously controlling the throttling device to adjust between the first opening degree and the second opening degree according to a preset amplification range, wherein the preset amplification range is greater than or equal to 50 steps and less than or equal to 350 steps.

In the foregoing technical solution, optionally, the processor is specifically configured to: detecting whether the exhaust temperature is greater than a first temperature threshold; and if the exhaust temperature is greater than the first temperature threshold value, determining that the exhaust temperature is abnormal.

The first temperature threshold may be a specific value or a temperature range.

In the foregoing technical solution, optionally, the processor is specifically configured to: if the exhaust temperature is detected to be greater than or equal to a second temperature threshold value, continuously detecting the speed increase of the exhaust temperature; and if the speed increase of the exhaust temperature is larger than a speed increase threshold value, determining that the exhaust temperature is abnormal.

In the foregoing technical solution, optionally, the processor is specifically configured to: if the refrigerant flows in along the direction of the valve needle and flows out along the direction vertical to the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be less than or equal to 90 pps; and if the refrigerant flows in the direction vertical to the valve needle and flows out in the direction of the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be greater than or equal to 30 pps.

A third aspect of the present invention provides an air conditioner, including: the technical solution of the second aspect provides an operation control device.

The air conditioner can be a split air conditioner or an integral air conditioner.

An embodiment of the fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed, the computer program implements the steps of the operation control method according to any one of the above technical solutions.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows a schematic flow diagram of an operation control method according to an embodiment of the invention;

FIG. 2 is a diagram illustrating a refrigerant flow characteristic according to an embodiment of the present invention;

FIG. 3 shows a schematic flow diagram of an operation control method according to another embodiment of the invention;

FIG. 4 shows a schematic view of a flow area of a throttling device according to an embodiment of the invention;

FIG. 5 shows a schematic view of a throttle device according to an embodiment of the present invention;

fig. 6 shows a schematic configuration of a throttle device according to another embodiment of the present invention;

fig. 7 shows a schematic construction of a throttle device according to a further embodiment of the invention;

fig. 8 is a schematic flow diagram of a refrigerant flowing in a throttling device according to an embodiment of the invention;

FIG. 9 shows a schematic block diagram of an operation control device according to an embodiment of the present invention;

fig. 10 is a schematic structural view illustrating an air conditioner according to an embodiment of the present invention;

fig. 11 is a schematic structural view showing an air conditioner according to another embodiment of the present invention

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

As shown in fig. 1, an operation control method according to an embodiment of the present invention is applied to an air conditioner, and includes:

step 102: acquiring the exhaust temperature of a compressor, and detecting whether the exhaust temperature is abnormal;

step 104, if the exhaust temperature is detected to be abnormal, controlling to increase the opening degree of the throttling device so as to increase the refrigerant flow rate according to a first rate;

106, increasing the opening degree of the throttling device to a first opening degree, and collecting the exhaust temperature again to detect whether the exhaust temperature is recovered to be normal or not;

and 108, if the exhaust temperature is still abnormal, continuing to control and increase the opening degree of the throttling device between the first opening degree and a preset second opening degree so as to increase the refrigerant flow rate according to a second rate, wherein the second rate is greater than the first rate, and the ratio of the first refrigerant flow rate corresponding to the second opening degree to the second refrigerant flow rate corresponding to the first opening degree is greater than or equal to 3.34 and less than or equal to 100.

In this embodiment, because the exhaust temperature of the compressor can be abnormal due to factors such as high return air temperature and high condensing pressure, it can be determined whether the air conditioner system is abnormal or not by collecting the exhaust temperature of the compressor and detecting whether the exhaust temperature is abnormal or not, and after the exhaust temperature is determined to be abnormal, the operating pressure of the air conditioner system is reduced by controlling and adjusting the opening of the throttling device, and the temperature of a specified position is reduced, so as to ensure the normal operation of the air conditioner.

In addition, the throttling device may be a throttling valve.

In the above embodiment, optionally, a ratio between the first refrigerant flow rate and the second refrigerant flow rate is greater than or equal to 3.35 and less than or equal to 30.

In this embodiment, after the ratio between the refrigerant flow rate corresponding to the second opening degree and the refrigerant flow rate corresponding to the first opening degree is defined, the range of the ratio is further reduced, on one hand, the accuracy of the control can be improved by increasing the lower threshold (from 3.34 to 3.35), and on the other hand, the difficulty of the control is reduced by reducing the upper threshold (from 100 to 30).

In the above embodiment, optionally, the operation control method further includes: controlling the compressor to perform a down-conversion operation.

In this embodiment, if it is determined that the exhaust temperature is abnormal, the throttling device is adjusted, and the compressor is subjected to a frequency reduction operation, specifically, the rotation speed of the compressor during operation is adjusted, and the flow rate is changed by adjusting the rotation speed, which is also beneficial to reducing the compression ratio of the compressor, so as to further reduce the exhaust temperature.

In the foregoing embodiment, optionally, before the obtaining the exhaust temperature of the compressor and detecting whether the exhaust temperature is abnormal, the method further includes: and acquiring the opening degree of the throttling device, and determining the opening degree as an initial opening degree, wherein the initial opening degree is smaller than the first opening degree, the first opening degree is larger than or equal to 150 steps and smaller than or equal to 400 steps, so that the flow rate of the refrigerant is increased between the initial opening degree and the first opening degree according to the first speed, and the flow rate of the refrigerant is smaller than or equal to 8L/min under the initial opening degree.

In this embodiment, the initial opening degree is the opening degree of the throttle valve that controls the normal operation of the air conditioner in the related art, that is, the initial opening degree in the adjusting method of the throttle valve in the present application, and satisfies the normal operation of the air conditioner by limiting the range of the initial opening degree, and further, by limiting the range of the first opening degree between steps [150, 400], it is possible to provide a sufficient adjusting space for the adjusting process of the first stage (i.e., increasing the refrigerant flow rate at the first rate), and if the exhaust temperature abnormality can be eliminated when the first opening degree is reached, the subsequent adjusting operation may not be performed.

In the above embodiment, optionally, if the exhaust temperature is still abnormal, the controlling to increase the opening degree of the throttling device between the first opening degree and a preset second opening degree so that the refrigerant flow rate increases according to a second rate specifically includes: and continuously controlling the throttling device to adjust between the first opening degree and the second opening degree according to a preset amplification range, wherein the preset amplification range is greater than or equal to 50 steps and less than or equal to 350 steps.

In this embodiment, if the refrigerant flow rate is controlled to increase at the second rate, the range of the increase in the opening degree of the throttle device is controlled to be between [50 and 350], so that the effective reduction of the excessive exhaust temperature can be ensured by adjusting the throttle device within this range, and the adverse effect on the performance of the air conditioner due to the excessive increase in the opening degree of the throttle device can be prevented.

In the above embodiment, optionally, a refrigerant flow rate at the first opening degree is less than or equal to 8L/min, and the first refrigerant flow rate is determined according to a rated heat exchange amount of the air conditioner.

In this embodiment, the rated heat exchange amount of the air conditioner corresponds to a target flow rate of a refrigerant in the air conditioner system, the first refrigerant flow rate is less than or equal to the target flow rate, and by limiting the target flow rate, under a normal condition, on the premise that the refrigerant flow rate is less than or equal to the target flow rate, a requirement for solving an abnormal exhaust temperature can be met, wherein the target flow rate is determined according to the rated heat exchange amount of the air conditioner, so that while the problem of the abnormal exhaust temperature is solved, normal operation of indoor cooling or heating is ensured, and then comfort level of a user using the air conditioner can be ensured.

Fig. 2 shows a flow characteristic having two or more segments, and the average rate of flow change between exv 0-exv 1 (i.e., the first rate) is less than the average rate of flow change between exv 1-exv 2 (i.e., the second rate).

Wherein exv0 is an initial opening degree, exv1 is a first opening degree, exv2 is a second opening degree, and when a ratio of a refrigerant flow rate corresponding to the second opening degree to a refrigerant flow rate corresponding to the first opening degree is k, Q2 is k × Q1, and k has a value in a range of 3.34 to 100, preferably 3.35 to 30.

In addition, the flow rate of the refrigerant passing through the throttling device under 0.1MPa needs to meet the following requirements: q0 is more than or equal to 0L/min and less than or equal to 8L/min, and in addition, the refrigerating capacity is divided according to the rated refrigerating capacity of the room air conditioner: q2 below 4500W is more than or equal to 70L/min; q2 of 4500-14000W is more than or equal to 80L/min

Preferably, the flow rate takes a selected intermediate value.

Further, the following relationship exists between the refrigerant flow rate and the opening degree:

step 0 is not less than exv0 is not more than 100; 150 steps are less than or equal to exv1 steps are less than or equal to 400 steps; and (3) not less than exv2-exv1 not less than 350 steps.

In the foregoing embodiment, optionally, acquiring the exhaust temperature of the compressor, and detecting whether the exhaust temperature is abnormal specifically includes: detecting whether the exhaust temperature is greater than a first temperature threshold; and if the exhaust temperature is greater than the first temperature threshold value, determining that the exhaust temperature is abnormal.

In this embodiment, as an expression of abnormal exhaust temperature, the exhaust temperature may be too high, if the exhaust temperature is too high, power consumption of the compressor may increase, a first temperature threshold is preset to represent that the exhaust temperature is at a maximum threshold in a normal range, and the collected exhaust temperature is compared with the first temperature threshold to determine whether the exhaust temperature is abnormal, so that when the exhaust temperature is determined to be abnormal, the throttling device in the regulation system is controlled in a manner of different flow rates to reduce the exhaust temperature, thereby ensuring normal operation power consumption of the compressor.

The first temperature threshold may be a specific value or a temperature range.

In the foregoing embodiment, optionally, the acquiring the exhaust temperature of the compressor and detecting whether the exhaust temperature is abnormal specifically includes: if the exhaust temperature is detected to be greater than or equal to a second temperature threshold value, continuously detecting the speed increase of the exhaust temperature; and if the speed increase of the exhaust temperature is larger than a speed increase threshold value, determining that the exhaust temperature is abnormal.

In this embodiment, whether the exhaust temperature is abnormal or not may be detected by detecting an increase in the exhaust temperature, which may be implemented based on a second temperature threshold and an increase threshold, where the second temperature threshold is a larger temperature value within a normal exhaust temperature range, and the increase threshold is a critical value for measuring whether the exhaust temperature increases too fast, and if it is detected that the exhaust temperature exceeds the second temperature threshold, the temperature increase is still larger than the increase threshold, which indicates that the current air conditioner system is abnormal in operation, and the exhaust temperature has a risk of exceeding the first temperature threshold, and at this time, the exhaust temperature may also be confirmed to be abnormal, and the throttle device in the regulation system is controlled in a manner of different flow rates to reduce the exhaust temperature, thereby ensuring normal operation power consumption of the compressor.

In the above embodiment, optionally, the throttling device includes a valve seat and a valve needle controlled to reciprocate by excitation, the valve seat is provided with an orifice cooperating with the valve needle to define a refrigerant flow area, the refrigerant flow area is defined by the valve needle and the orifice, from the first opening degree to the first opening degree, the refrigerant flow area increases according to the third rate, from the first opening degree to the fourth rate, and a ratio between the refrigerant flow corresponding to the second opening degree and the refrigerant flow corresponding to the first opening degree is the same as a ratio between the refrigerant flow corresponding to the second opening degree and the refrigerant flow corresponding to the first opening degree.

In this embodiment, in order to realize that the refrigerant flow rate increases at the first rate when the throttle device is adjusted between the first opening degree and the first opening degree, and the refrigerant flow rate increases at the second rate when the throttle device is adjusted at or above the first opening degree, the flow area of the refrigerant defined between the throttle hole and the needle is limited, that is, the flow area increases at the third rate when the throttle device is adjusted between the first opening degree and the first opening degree, and the flow area increases at the fourth rate when the throttle device is continuously adjusted based on the first opening degree, and the fourth rate/the third rate is equal to the second rate/the first rate, and the refrigerant flow rate is adjusted at different rates by adjusting the flow area.

In the above embodiment, optionally, the free end portion of the valve needle includes any one of a cone structure, a circular truncated cone structure and a convex arc surface structure; the structure of with free end connection is the round platform structure, the round platform structure is one or more, the generating line of round platform structure is constructed for sharp and/or pitch arc, the tapering of free end is greater than the tapering of round platform structure, wherein, if throttling arrangement's aperture increases to first aperture, then free end with the round platform structure is connected the face with the orifice is injectd flow area.

In this embodiment, the needle that can realize above-mentioned speed regulation has multiple structural style, through the injecing to the needle structure, realizes the regulation to flow area when adjusting the aperture to satisfy the refrigerant flow and when throttling arrangement is in different regulation intervals, adjust through different regulation rate, and then can solve the unusual problem of exhaust temperature high-efficiently.

In the foregoing embodiment, optionally, if the exhaust gas temperature is still abnormal, continuing to control to increase the opening degree of the throttle device between the first opening degree and a preset second opening degree specifically includes: if the refrigerant flows in along the direction of the valve needle and flows out along the direction vertical to the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be less than or equal to 90 pps; and if the refrigerant flows in the direction vertical to the valve needle and flows out in the direction of the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be greater than or equal to 30 pps.

In the embodiment, when the refrigerant is in different flow directions, the control requirement of the throttling device is met by controlling the excitation speed to be within a limited range.

As shown in fig. 3, an operation control method according to another embodiment of the present invention includes:

step 302, controlling the air conditioner to start and operate in a cooling mode or a heating mode;

step 304, detecting whether the exhaust temperature of the compressor is too high or rises too fast in a high-temperature area;

step 306, if the exhaust temperature is detected to be too high or the exhaust temperature rises too fast in a high-temperature area, rapidly adjusting the opening degree of the throttling device from the initial opening degree to a first opening degree;

step 308, when the exhaust temperature is still too high or still rises too fast in a high temperature region, continuously increasing the opening degree of the throttling device between the first opening degree and the second opening degree;

in step 310, a frequency reduction operation is performed on the compressor while adjusting the throttle opening.

As shown in fig. 4, if the first opening degree corresponds to the flow area of S1 and the second opening degree corresponds to the flow area of S2+ S1, (S1+ S2)/S1 is k.

As shown in fig. 5 to 9, the throttle device is embodied as a throttle valve, and includes the following structure: spring 502, stator coil 504, rotor magnet 506, needle rotating sleeve 508, spacer 510, inlet and outlet copper tube 512, needle 514, valve body 516, and orifice 518. the needle may be implemented in a variety of ways to accommodate different adjustment speeds.

As shown in fig. 5, the cone structure 522 and the circular truncated cone structure 520 are included, and a joint of the cone structure 522 and the circular truncated cone structure 520 corresponds to a first opening degree, where a generatrix of the circular truncated cone is a straight line.

As shown in fig. 6, the convex arc structure 526 and the circular truncated cone structure 524 are included, and a butt joint of the convex arc structure 526 and the circular truncated cone structure 524 corresponds to a first opening degree, wherein a generatrix of the circular truncated cone is a straight line.

As shown in fig. 7, the cone structure 530 and the circular truncated cone structure 528 are included, and the joint of the cone structure 530 and the circular truncated cone structure 528 corresponds to a first opening degree, wherein a generatrix of the circular truncated cone is an arc line.

As shown in fig. 8, in the above embodiment, optionally, if the exhaust gas temperature is still abnormal, continuing to control to increase the opening degree of the throttle device between the first opening degree and a preset second opening degree specifically includes: if the refrigerant flows in along the direction of the valve needle and flows out along the direction vertical to the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be less than or equal to 90 pps; and if the refrigerant flows in the direction vertical to the valve needle and flows out in the direction of the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be greater than or equal to 30 pps.

As shown in fig. 9, an operation control device 90 according to an embodiment of the present invention includes: a memory 904 and a processor 902; a memory 904 for storing program code; a processor 902 for invoking program code execution: acquiring the exhaust temperature of a compressor, and detecting whether the exhaust temperature is abnormal; if the exhaust temperature is detected to be abnormal, controlling to increase the opening degree of the throttling device so as to increase the refrigerant flow according to a first rate; the opening degree of the throttling device is increased to a first opening degree, and the exhaust temperature is collected again to detect whether the exhaust temperature is recovered to be normal or not; and if the exhaust temperature is still abnormal, continuously controlling and increasing the opening degree of the throttling device between the first opening degree and a preset second opening degree so as to increase the refrigerant flow rate according to a second rate, wherein the second rate is greater than the first rate, and the ratio of the first refrigerant flow rate corresponding to the second opening degree to the second refrigerant flow rate corresponding to the first opening degree is greater than or equal to 3.34 and less than or equal to 100.

In addition, the throttling device may be a throttling valve.

In the foregoing embodiment, optionally, the processor 902 is specifically configured to: controlling the compressor to perform a down-conversion operation.

In the foregoing embodiment, optionally, the processor 902 is specifically configured to: and acquiring the opening degree of the throttling device, and determining the opening degree as an initial opening degree, wherein the initial opening degree is less than or equal to 100 steps, the first opening degree is greater than or equal to 150 steps and less than or equal to 400 steps, so that the flow rate of the refrigerant is increased between the initial opening degree and the first opening degree according to the first speed, and the flow rate of the refrigerant is less than or equal to 8L/min under the initial opening degree.

In the foregoing embodiment, optionally, the processor 902 is specifically configured to: and continuously controlling the throttling device to adjust between the first opening degree and the second opening degree according to a preset amplification range, wherein the preset amplification range is greater than or equal to 50 steps and less than or equal to 350 steps.

In the foregoing embodiment, optionally, the processor 902 is specifically configured to: detecting whether the exhaust temperature is greater than a first temperature threshold; and if the exhaust temperature is greater than the first temperature threshold value, determining that the exhaust temperature is abnormal.

The first temperature threshold may be a specific value or a temperature range.

In the foregoing embodiment, optionally, the processor 902 is specifically configured to: if the exhaust temperature is detected to be greater than or equal to a second temperature threshold value, continuously detecting the speed increase of the exhaust temperature; and if the speed increase of the exhaust temperature is larger than a speed increase threshold value, determining that the exhaust temperature is abnormal.

In the above embodiment, optionally, the throttling device includes a valve seat and a valve needle controlled to reciprocate by excitation, the valve seat is provided with an orifice cooperating with the valve needle to define a refrigerant flow area, the refrigerant flow area is defined by the valve needle and the orifice, from the first opening degree to the first opening degree, the refrigerant flow area increases according to a third rate, from the first opening degree to a fourth rate, and a ratio between the refrigerant flow corresponding to the second opening degree and the refrigerant flow corresponding to the first opening degree is the same as a ratio between the refrigerant flow corresponding to the second opening degree and the refrigerant flow corresponding to the first opening degree.

In the foregoing embodiment, optionally, the processor 902 is specifically configured to: if the refrigerant flows in along the direction of the valve needle and flows out along the direction vertical to the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be less than or equal to 90 pps; and if the refrigerant flows in the direction vertical to the valve needle and flows out in the direction of the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be greater than or equal to 30 pps.

An air conditioner according to an embodiment of the present invention includes: the above embodiment provides the operation control device 90.

As shown in fig. 10, the air conditioner further includes a compressor 1002, a four-way valve 1004, an outdoor fan 1006, an outdoor heat exchanger 1008, an indoor heat exchanger 1010, an indoor fan 1012, and a throttling device 1014, wherein the throttling device may be any one of the structural forms of fig. 7 to 9, but is not limited to the above structural form.

As shown in fig. 11, the air conditioner may further include an auxiliary heating device 1016 in an indoor unit of the air conditioner, on the basis of the compressor 1002, the four-way valve 1004, the outdoor fan 1006, the outdoor heat exchanger 1008, the indoor heat exchanger 1010, the indoor fan 1012 and the throttling device 1014, so as to turn on auxiliary heating for room heating when the defrosting operation is performed.

A computer-readable storage medium according to an embodiment of the present invention, has a computer program stored thereon, which, when executed, implements the steps of the operation control method described in any one of the above.

In summary, the present invention provides an operation control method, an operation control device, an air conditioner and a computer readable storage medium, which can determine whether an operation abnormality occurs in an air conditioner system by collecting an exhaust temperature of a compressor and detecting whether the exhaust temperature is abnormal, after determining that the exhaust temperature is abnormal, reduce an operation pressure of the air conditioner system by controlling and adjusting an opening degree of a throttling device, and reduce a temperature of a designated position, so as to ensure a normal operation of the air conditioner, wherein the adjusting of the opening degree of the throttling device from an initial opening degree includes at least two stages, the first stage is a first stage from the initial opening degree to a first opening degree, the second stage is a second stage from the first opening degree to a second opening degree, a refrigerant flow rate in the first stage is increased at a first rate, a refrigerant flow rate in the second stage is increased at a second rate, and the second rate is greater than the first rate, and the ratio of the refrigerant flow corresponding to the second opening degree to the refrigerant flow corresponding to the first opening degree is [3.34, 100], on one hand, when the abnormal exhaust temperature cannot be solved or relieved after the refrigerant flow is increased at the first rate, the system pressure can be further reduced by the opening degree of the throttling device at the second rate, so that the normal operation of the compressor is ensured, on the other hand, compared with the solution of the abnormal exhaust temperature of the related art, a bypass for executing the unloading operation is not required to be arranged independently, so that the preparation cost is not increased, and on the other hand, compared with the solution of the abnormal exhaust temperature of the related art, the shutdown operation is not required, so that the normal use of a user is not influenced.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined in the appended claims and their equivalents, and it is intended that the invention encompass such changes and modifications as well.

Claims

1. An operation control method is suitable for an air conditioner, the air conditioner comprises a compressor and a throttling device for controlling the flow of a refrigerant flowing through the compressor, and the operation control method is characterized by comprising the following steps:

acquiring the exhaust temperature of a compressor, and detecting whether the exhaust temperature is abnormal;

if the exhaust temperature is detected to be abnormal, controlling to increase the opening degree of the throttling device so as to increase the refrigerant flow according to a first rate;

the opening degree of the throttling device is increased to a first opening degree, and the exhaust temperature is collected again to detect whether the exhaust temperature is recovered to be normal or not;

If the exhaust temperature is still abnormal, the opening degree of the throttling device is continuously controlled to be increased between the first opening degree and a preset second opening degree so as to increase the refrigerant flow according to a second speed,

wherein the second rate is greater than the first rate;

the throttling device comprises a valve seat and a valve needle which is controlled to move back and forth through excitation, an orifice matched with the valve needle is arranged on the valve seat so as to limit the flow area of a refrigerant by the valve needle and the orifice,

the flow area increases according to a third rate from the first opening degree to the first opening degree, and from the first opening degree to the second opening degree, the ratio between the flow area corresponding to the second opening degree and the flow area corresponding to the first opening degree is the same as the ratio between the refrigerant flow rate corresponding to the second opening degree and the refrigerant flow rate corresponding to the first opening degree.

2. The operation control method according to claim 1,

the ratio of the first refrigerant flow corresponding to the second opening degree to the second refrigerant flow corresponding to the first opening degree is greater than or equal to 3.34 and less than or equal to 100.

3. The operation control method according to claim 2,

the ratio of the first refrigerant flow rate to the second refrigerant flow rate is greater than or equal to 3.35 and less than or equal to 30.

4. The operation control method according to claim 1, characterized by further comprising:

controlling the compressor to perform a down-conversion operation.

5. The operation control method according to claim 3, before the acquiring a discharge temperature of a compressor and detecting whether the discharge temperature is abnormal, further comprising:

acquiring the opening degree of the throttling device, determining the opening degree as an initial opening degree, wherein the initial opening degree is smaller than the first opening degree, the first opening degree is larger than or equal to 150 steps and smaller than or equal to 400 steps, so that the flow rate of the refrigerant is increased between the initial opening degree and the first opening degree according to the first speed,

and under the initial opening degree, the refrigerant flow is less than or equal to 8L/min.

6. The operation control method according to claim 5, wherein if the exhaust temperature is still abnormal, continuing to control the throttle device to increase the opening degree between the first opening degree and a preset second opening degree so that the refrigerant flow rate increases according to a second rate, specifically comprises:

And continuously controlling the throttling device to adjust between the first opening degree and the second opening degree according to a preset amplification range, wherein the preset amplification range is greater than or equal to 50 steps and less than or equal to 350 steps.

7. The operation control method according to claim 6, wherein the first refrigerant flow rate is determined according to a rated heat exchange amount of the air conditioner.

8. The operation control method according to any one of claims 1 to 7, wherein the acquiring of the discharge temperature of the compressor and the detecting of whether the discharge temperature is abnormal specifically includes:

detecting whether the exhaust temperature is greater than a first temperature threshold;

and if the exhaust temperature is greater than the first temperature threshold value, determining that the exhaust temperature is abnormal.

9. The operation control method according to any one of claims 1 to 7, wherein the acquiring of the discharge temperature of the compressor and the detecting of whether the discharge temperature is abnormal specifically includes:

if the exhaust temperature is detected to be greater than or equal to a second temperature threshold value, continuously detecting the speed increase of the exhaust temperature;

and if the speed increase of the exhaust temperature is larger than a speed increase threshold value, determining that the exhaust temperature is abnormal.

10. The operation control method according to claim 9,

the free end part of the valve needle comprises any one of a cone structure, a circular truncated cone structure and a convex cambered surface structure;

the structure connected with the free end part is a circular truncated cone structure, the number of the circular truncated cone structures is one or more, the generatrix of the circular truncated cone structure is constructed into a straight line and/or an arc line, the taper of the free end part is greater than that of the circular truncated cone structure,

and if the opening degree of the throttling device is increased to the first opening degree, the free end part, the circular truncated cone structure connecting surface and the throttling hole limit the flow area.

11. The operation control method according to claim 10, wherein the continuing the control to increase the opening degree of the throttle device between the first opening degree and a preset second opening degree if the exhaust temperature is still abnormal, specifically comprises:

if the refrigerant flows in along the direction of the valve needle and flows out along the direction vertical to the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be less than or equal to 90 pps;

and if the refrigerant flows in the direction vertical to the valve needle and flows out in the direction of the valve needle, continuously controlling the excitation speed of the throttling device regulated between the first opening degree and the second opening degree to be greater than or equal to 30 pps.

12. An operation control device adapted for an air conditioner, comprising: a processor capable of implementing the steps defined by the operation control method of any one of claims 1 to 11 when executing a computer program.

13. An air conditioner, comprising:

the operation control device according to claim 12.

14. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed, implements the steps of the operation control method according to any one of claims 1 to 11.