WO2018141151A1

WO2018141151A1 - Air conditioner control method, device and air conditioner

Info

Publication number: WO2018141151A1
Application number: PCT/CN2017/092935
Authority: WO
Inventors: 罗荣邦; 王飞; 付裕; 张明杰; 丁爽
Original assignee: 海尔集团公司; 青岛海尔空调器有限总公司
Priority date: 2017-02-04
Filing date: 2017-07-14
Publication date: 2018-08-09

Abstract

An air conditioner control method, a control device and an air conditioner, the control method comprising the following steps: S101, obtaining a target liquid outlet pressure and the initial liquid outlet pressure of a second throttling device, the target liquid outlet pressure comprising the corresponding liquid outlet pressure of the second throttling device when refrigerants flowing back to a compressor meet a pressure requirement for air supply; S102, detecting outdoor ambient temperature and radiator temperature; and S103, adjusting the flow openings of a first throttling device, the second throttling device and a third throttling device according to the outdoor ambient temperature and the radiator temperature, so that the initial liquid outlet pressure reaches the target liquid outlet pressure. With the method, the heat exchange between an electronic control element and gaseous refrigerants flowing through a radiator is controlled so as to carry out the heat exchange and cooling of the electronic control element. At the same time, the flow opening of a throttling device may be adjusted according to a preset air supply temperature, so that part of the refrigerants after heat exchange meet the pressure requirement of a compressor for air supply and enthalpy addition, thereby improving the overall performance of the air conditioner.

Description

Air conditioner control method, device and air conditioner

The present application is filed on the basis of the Chinese Patent Application No. PCT Application No.

The present application is based on a Chinese patent application filed on Jan. 4, 2017, the filing date of

Technical field

The invention relates to the technical field of air conditioners, in particular to a method, a device and an air conditioner for controlling an air conditioner.

Background technique

At present, fixed-frequency or inverter air conditioner products on the market, when the air conditioner is operated under outdoor temperature in summer, the enthalpy of the refrigerant after compression by the compressor cannot meet the enthalpy requirement of heat exchange, resulting in the refrigerant flowing into the condenser and the outdoor The heat exchange efficiency of the environment is reduced, so it is necessary to perform a gas-filling operation for the compressor; and the existing gas-enhanced increase is usually a method of directly charging the refrigerant in the outdoor unit condenser into the compressor. The temperature of the refrigerant often fails to meet the optimal air supply and pressure requirements.

Summary of the invention

Embodiments of the present invention provide a method, an apparatus, and an air conditioner for controlling an air conditioner. In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This generalization is not a general comment, nor is it intended to identify key/critical constituent elements or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the following detailed description.

According to a first aspect of the present invention, a method of controlling an air conditioner includes: acquiring a target outlet pressure of a second throttle device and an initial outlet pressure, wherein the target outlet pressure includes a refrigerant flowing back to the compressor to satisfy The outlet pressure of the second throttle device corresponding to the air supply pressure requirement; detecting the outdoor ambient temperature and the radiator temperature; adjusting the first throttle device, the second throttle device, and the first according to the outdoor ambient temperature and the radiator temperature The flow opening of the three throttling device causes the initial discharge pressure to reach the target discharge pressure.

The control method further includes: obtaining a target indoor temperature input by the user and an initial indoor temperature; and when the outdoor temperature does not exceed the preset outdoor temperature threshold, controlling to gradually close the first throttle device at a third opening rate, and according to the target indoor temperature The flow opening of the second throttling device and the third throttling device is adjusted to bring the initial indoor temperature to the target indoor temperature.

The control method further comprises: adjusting the flow opening degree of the first throttling device, the second throttling device and the third throttling device according to the outdoor ambient temperature and the radiator temperature when the air conditioner is operating in the heating mode, so as to make the initial hydraulic pressure The force reaches the target discharge pressure, including: when the Tao<t1, the flow rate of the first throttle device is maintained unchanged, and the second throttle device is adjusted from the initial opening degree to the seventh flow rate at the third opening rate. Degree, and adjust the flow opening degree of the third throttling device, so that the initial liquid discharge pressure reaches the target liquid discharge pressure; when t1≤Tao<t2, the first throttle device is controlled to adjust from the initial opening degree at the fourth opening rate Up to the eighth flow opening degree, the second throttling device is adjusted from the initial opening degree to the ninth flow rate opening at the third opening degree rate, and adjusting the flow opening degree of the third throttling device, so that the initial discharge pressure reaches the target out Hydraulic pressure; when t3≤Tao, the first throttle device is controlled to adjust from the initial opening degree to the tenth flow opening degree at the fourth opening degree rate, and the second throttle device is adjusted from the initial opening degree to the third opening degree rate to the third opening degree The eleventh flow rate opening, and adjust the third throttle The flow opening degree is set such that the initial liquid discharge pressure reaches the target liquid discharge pressure; wherein, Tao is the outdoor ambient temperature, the fourth opening rate is <the third opening rate, the initial opening degree is the seventh flow opening degree, and the eighth flow rate is Opening degree>ninth flow rate opening degree, tenth flow rate opening degree>first eleventh flow rate opening degree, eighth flow rate opening degree<tenth flow rate opening degree>initial opening degree, seventh quantity opening degree<ninth flow rate opening degree< The eleventh flow rate opening.

According to a second aspect of the present invention, there is also provided a method of controlling an air conditioner, the method comprising: obtaining an outdoor temperature threshold, a radiator temperature threshold, and a supplemental air temperature condition, wherein the supplemental air temperature condition includes flowing back to the compressor The temperature of the radiator corresponding to the refrigerant requirement temperature; the outdoor temperature and the radiator temperature are obtained; when the outdoor temperature is greater than the outdoor temperature threshold, and the radiator temperature is not greater than the radiator temperature threshold, the first throttle device is adjusted. The flow rate is such that the heat sink temperature satisfies the supplemental air temperature condition.

According to a third aspect of the present invention, a method for controlling an air conditioner is provided, the control method comprising: obtaining Taking the outdoor temperature threshold, the radiator temperature threshold, and the supplemental temperature condition, wherein the supplemental air temperature condition includes a temperature of the radiator corresponding to the refrigerant flowing back to the compressor when the refrigerant temperature requirement is met; and detecting an outdoor temperature of the space in which the air conditioner is located When the outdoor temperature is not greater than the outdoor temperature threshold, the temperature of the heat sink in the set time length is detected; when the heat dissipation temperature is not greater than the heat sink temperature threshold, the flow opening degree of the first throttle device is adjusted to make the heat dissipation temperature The insufflation temperature condition is reached.

According to a fourth aspect of the present invention, a control method for an air conditioner is provided, the control method comprising: acquiring an outdoor temperature threshold and a supplemental air temperature condition, wherein the supplemental air temperature condition includes the refrigerant flowing back to the compressor satisfying the air supply The temperature of the radiator corresponding to the temperature requirement; the outdoor temperature, the outdoor unit temperature and the radiator temperature when detecting the air conditioning operation heating mode; when the outdoor temperature is not greater than the outdoor temperature threshold, and the outdoor unit temperature is not greater than the condensation critical temperature, The opening degree corresponding to the maximum flow rate is used as the reference opening degree of the first throttling device, and the opening degree of the first throttling device is adjusted so that the radiator temperature satisfies the insufflation temperature condition.

According to a fifth aspect of the present invention, a control device for an air conditioner is provided, comprising: an acquiring unit, configured to acquire a target outlet pressure and an initial outlet pressure of the second throttle device, wherein the target outlet pressure includes a flow back The outlet pressure of the second throttling device corresponding to the refrigerant of the compressor meets the requirements of the supplemental gas pressure; and the outdoor ambient temperature and the radiator temperature detected by the air conditioner; the main control unit is used for the outdoor environment temperature and heat dissipation The temperature of the device adjusts the flow opening degree of the first throttling device, the second throttling device and the third throttling device, so that the initial discharge pressure reaches the target discharge pressure.

Further, the acquiring unit is configured to acquire a target indoor temperature and an initial indoor temperature input by the user; and the main control unit is configured to control to gradually close the first throttle at a third opening rate when the outdoor temperature does not exceed the preset outdoor temperature threshold And adjusting the flow opening degree of the second throttling device and the third throttling device according to the target indoor temperature, so that the initial indoor temperature reaches the target indoor temperature.

Further, the main control unit is configured to: when Tao < t1, control to maintain the flow opening degree of the first throttle device unchanged, and the second throttle device adjusts from the initial opening degree to the seventh flow rate at the third opening degree rate Degree, and adjust the flow opening degree of the third throttling device, so that the initial liquid discharge pressure reaches the target liquid discharge pressure; when t1≤Tao<t2, the first throttle device is controlled to adjust from the initial opening degree at the fourth opening rate Up to the eighth flow opening degree, the second throttling device is adjusted from the initial opening degree to the ninth flow rate opening at the third opening degree rate, and adjusting the flow opening degree of the third throttling device, so that the initial discharge pressure reaches the target out Hydraulic pressure; when t3≤Tao, the first throttle device is controlled to adjust from the initial opening degree to the tenth flow opening degree at the fourth opening degree rate, and the second throttle device is adjusted from the initial opening degree to the third opening degree rate to the third opening degree The eleventh flow opening degree, and adjusting the flow opening degree of the third throttling device, so that the initial liquid discharge pressure reaches the target liquid discharge pressure; wherein, Tao is the outdoor ambient temperature, and the fourth opening rate is <the third opening rate, Initial opening degree> seventh flow opening degree, eighth flow opening degree> Flow opening degree, tenth flow rate opening> eleventh flow rate opening degree, eighth flow rate opening degree <tenth flow rate opening degree <initial opening degree, seventh quantity opening degree <ninth flow rate opening degree> eleventh flow rate opening degree.

According to a sixth aspect of the present invention, a control device for an air conditioner is provided, the control device comprising: acquiring a unit for obtaining an outdoor temperature threshold and a radiator temperature threshold and a supplemental air temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the refrigerant temperature requirement is met; and The outdoor temperature detected by the first sensor and the heat sink temperature detected by the third sensor; the main control unit is configured to adjust the first throttle device when the outdoor temperature is greater than the outdoor temperature threshold and the heat sink temperature is not greater than the heat sink temperature threshold The flow rate is such that the heat sink temperature satisfies the supplemental air temperature condition.

According to a seventh aspect of the present invention, a control device for an air conditioner is provided, the control device comprising: an acquisition unit, configured to acquire an outdoor temperature threshold, a radiator temperature threshold, and a supplemental air temperature condition, wherein the supplemental air temperature condition The heat sink temperature corresponding to the refrigerant flowing back to the compressor meets the requirements of the supplemental air temperature; and the outdoor temperature for obtaining the space in which the air conditioner is detected by the first sensor; and the heat sink detected by the second sensor is set The temperature of the radiator in a certain length of time; the main control unit is configured to adjust the flow opening degree of the first throttle device when the heat dissipation temperature is not greater than the temperature threshold of the radiator, so that the temperature of the radiator reaches the temperature of the supplemental air temperature.

According to an eighth aspect of the present invention, there is also provided a control device for an air conditioner, the control device comprising: an acquisition unit configured to acquire an outdoor temperature threshold and a supplemental air temperature condition, wherein the supplemental air temperature condition includes flowing back to the compressor The temperature of the radiator corresponding to the refrigerant temperature requirement; and the outdoor temperature, outdoor unit temperature and radiator temperature detected when the air conditioner is operating in the heating mode; the main control unit is used for the outdoor temperature not greater than When the outdoor temperature threshold is not greater than the frosting critical temperature, the opening degree corresponding to the maximum flow rate is used as the reference opening degree of the first throttle device, and the opening degree of the first throttle device is adjusted to make the heat sink temperature satisfy the compensation. Gas temperature conditions.

According to a ninth aspect of the present invention, an air conditioner is further provided, the air conditioner comprising an indoor unit having a first heat exchanger, an outdoor unit having a second heat exchanger and a compressor, and the electric control is located in the outdoor unit, the first The heat exchanger, the second heat exchanger and the compressor are connected by the first pipeline and the second pipeline for forming a refrigerant circulation loop, the air conditioner further comprises a cooling component, and the cooling component has a flasher and a first throttle device And a heat sink for dissipating heat for the electric control, wherein the flasher is connected to the first pipeline, and the radiator is respectively connected to the air inlet and the flasher of the compressor through the cooling pipeline, and the first throttle device is set in the compression On the cooling line between the machine and the flasher, the air conditioner has a second throttling device disposed on the first line between the second heat exchanger and the flasher, and is disposed in the first heat exchanger and flashing a third throttle device on the first line between the devices, the air conditioner is provided with a first sensor for detecting the evaporation pressure or the condensation pressure of the first heat exchanger, and the first for detecting the evaporation pressure or the condensation pressure of the second sensor Two sensors for detection The third hydraulic pressure sensor of the two throttle means, a fourth sensor for detecting the outdoor temperature, and a fifth sensor for detecting the temperature of the radiator, and a sixth sensor for detecting the temperature of the indoor environment.

The control method of the invention controls the heat exchange between the electronic control component and the gaseous refrigerant flowing through the radiator to achieve heat exchange and temperature reduction of the electronic control component, and can also adjust the flow opening degree of the throttle device according to the preset supplemental air temperature. Therefore, the part of the refrigerant after the heat exchange can meet the temperature requirement of the compressor air supply and increase the overall performance of the air conditioner.

It should be understood that the above general description and the following detailed description are merely illustrative and illustrative and not The invention can be limited.

DRAWINGS

The accompanying drawings, which are incorporated in the specification of FIG

1 is a flow chart showing a control method of the present invention according to a first exemplary embodiment;

2 is another flow chart of the control method of the present invention shown in accordance with the first exemplary embodiment;

Figure 3 is another flow chart of the control method of the present invention shown in accordance with the first exemplary embodiment;

4 is a flow chart showing a control method of the present invention according to a second exemplary embodiment;

Figure 5 is another flow chart of the control method of the present invention shown in accordance with the second exemplary embodiment;

Figure 6 is a flow chart showing a control method of the present invention according to a third exemplary embodiment;

Figure 7 is another flow chart of the control method of the present invention shown in accordance with the third exemplary embodiment;

Figure 8 is a flow chart showing a control method of the present invention according to a fourth exemplary embodiment;

Figure 9 is another flow chart of the control method of the present invention shown in accordance with the fourth exemplary embodiment;

FIG. 10 is a schematic overall structural view of an air conditioner of the present invention, according to an exemplary embodiment; FIG.

Figure 11 is a pressure diagram of a refrigerant circulation in an air conditioner of the present invention, according to an exemplary embodiment;

Figure 12 is a temperature entropy diagram of a refrigerant cycle in an air conditioner of the present invention, shown in accordance with an exemplary embodiment.

detailed description

The detailed description of the embodiments of the invention are set forth in the description Other embodiments may include structural, logical, electrical, process, and other changes. The examples represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included or substituted for portions and features of other embodiments. The scope of the embodiments of the invention includes the full scope of the claims, and all equivalents of the claims. In this context, various embodiments may be referred to individually or collectively by the term "invention," for convenience only, and if more than one invention is disclosed, it is not intended to automatically limit the scope of the application to any A single invention or inventive concept. Herein, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not require or imply any actual relationship between the entities or operations or order. Furthermore, the terms "comprises" or "comprising" or "comprising" or any other variations are intended to encompass a non-exclusive inclusion, such that a process, method, or device that includes a plurality of elements includes not only those elements but also other items not specifically listed. Elements, or elements that are inherent to such a process, method, or device. In the absence of more restrictions, by the statement "includes A singular element does not exclude the presence of additional equivalent elements in a process, method, or apparatus that includes the element. The various embodiments herein are described in a progressive manner, each of which focuses on It is a difference from other embodiments, and the same similar parts between the respective embodiments can be referred to each other. For the method, product, and the like disclosed in the embodiment, since it corresponds to the method part disclosed in the embodiment, the description is It's relatively simple, please refer to the method section for related information.

As shown in FIG. 1, a first embodiment of the present invention provides a method for controlling an air conditioner, and the main steps of the control method include:

S101: Obtain a target outlet pressure and an initial outlet pressure of the second throttle device, and the target outlet pressure includes a discharge pressure of the second throttle device corresponding to the refrigerant flowing back to the compressor when the refrigerant pressure requirement is met;

Taking the air-conditioning operating cooling mode as an example, after the refrigerant flows out of the second heat exchanger of the outdoor unit, the second throttling device performs a throttling, and then is split in the flasher, wherein the gaseous refrigerant flows along the cooling pipe to the first section. The flow device performs secondary throttling, the liquid refrigerant continues to flow along the first pipeline, and the second throttling device performs secondary throttling, so the pressure change of the refrigerant during the first throttling of the second throttling device may affect To the subsequent compressor air entrainment efficiency and indoor heat exchange efficiency, it is necessary to obtain parameter information such as the initial outlet pressure of the second throttling device and the target outlet pressure for the air conditioner to achieve an optimal working state;

The initial outlet pressure of the second throttling device can be detected by a third sensor disposed at the outlet of the second throttling device;

S102. Detecting an outdoor ambient temperature and a heatsink temperature. In an embodiment, the outdoor ambient temperature is detected by a fourth sensor disposed on the outdoor unit, and the heat sink temperature is detected by a fifth sensor disposed on the heat sink fin;

S103. Adjust a flow opening degree of the first throttling device, the second throttling device, and the third throttling device according to the outdoor ambient temperature and the radiator temperature, so that the initial discharge pressure reaches the target discharge pressure. In an embodiment, in the case of the summer cooling mode, the control method of the present invention determines the flow opening adjustment mode of the three throttling devices according to the temperature interval in which the difference between the outdoor ambient temperature and the radiator temperature is located; and in the winter heating mode In the case, the control method of the present invention determines the flow opening adjustment mode of the three throttling devices according to the temperature interval in which the outdoor ambient temperature is located; in the above two operating modes, the opening adjustment of the three throttling devices can be adjusted. The flow rate of the refrigerant in the different refrigerant pipes is such that when the initial discharge pressure of the second throttle device reaches the target discharge pressure, the refrigerant charged into the compressor via the cooling pipe can also satisfy the increase of the air supply to the compressor. The pressure requirements, in turn, increase the compression efficiency of the compressor.

In some embodiments of the invention, the step of obtaining the target outlet pressure of the second throttle device comprises:

Detecting the evaporating pressure and the condensing pressure of the air conditioner; in the embodiment, when the air conditioner is in the cooling mode, the evaporating pressure is detected by the first sensor disposed at the first heat exchanger of the indoor unit, and the condensing pressure is set to be set in the outdoor unit The second sensor at the two heat exchangers is detected;

According to the evaporation pressure and the condensing pressure, the target outlet pressure is determined, and the calculation formula of the target outlet pressure is:

Wherein, the P _{target liquid} is the target outlet pressure, P _o is the evaporation pressure, and P _k is the condensation pressure; theoretically, when the target outlet pressure can reach the discharge pressure corresponding to the evaporation pressure and the condensation pressure, the air conditioner The system cooling heat can achieve maximum efficiency, so the control method of the present invention adjusts accordingly according to the target outlet pressure as a target parameter.

In some embodiments of the present invention, as shown in FIG. 2, when the air conditioner operates the cooling mode, the first throttle device, the second throttle device, and the third throttle device are adjusted according to the outdoor ambient temperature and the radiator temperature. The flow opening is such that the initial discharge pressure reaches the target discharge pressure, and the main steps include:

When 0≤Δt<T1, the first throttle device is controlled to adjust from the initial opening degree to the first flow opening degree at the first opening rate, and the third throttle device is adjusted from the initial opening degree to the second opening degree rate to a second flow opening degree, and adjusting the flow opening degree of the second throttling device until the initial discharge pressure reaches the target discharge pressure; for example, in one embodiment, the opening adjustment range of the three throttling devices is 0 to 500B, the initial opening of the three is 220 ~ 240B, T1 is set to 3 ° C, when 0 ≤ Δt < 3 ° C, the first throttle device is controlled to adjust from the initial opening degree to the opening rate of 5B / s to The first flow opening degree 50B and the third throttle device are adjusted from the initial opening degree to the second flow opening degree 120-140B at an opening rate of 10 B/s, and the first throttling device and the second throttling device reach corresponding After the flow opening degree, adjusting the flow opening degree of the second throttling device, so that the initial liquid discharge pressure of the second throttling device reaches the target discharge pressure;

When T1≤Δt<T2, the first throttle device is controlled to adjust from the initial opening degree to the third flow opening degree at the first opening rate, and the third throttle device is adjusted from the initial opening degree to the second opening rate. a fourth flow opening degree, and adjusting the flow opening degree of the second throttling device until the initial liquid discharge pressure reaches the target liquid discharge pressure; for example, in one embodiment, the opening degree of the three throttling devices is adjusted to 0 to 500B, the initial opening of the three is 220 ~ 240B, T1 is set to 3 ° C, T2 is set to 6 ° C, when 3 ° C ≤ Δt < 6 ° C, the first throttle device is controlled to open 5B / s The rate is adjusted from the initial opening degree to the third flow opening degree 80-100B, and the third throttle device is adjusted from the initial opening degree to the fourth flow opening degree 160-180B at an opening rate of 10 B/s, in the first throttling After the device and the second throttling device reach the corresponding flow opening degree, the flow opening degree of the second throttling device is adjusted, so that the initial outlet pressure of the second throttling device reaches the target outlet pressure;

When T2≤Δt, the first throttle device is controlled to adjust from the initial opening degree to the fifth flow opening degree at the first opening degree rate, and the third throttle device is adjusted from the initial opening degree to the sixth opening rate at the second opening degree rate. Flow opening degree, and adjusting the flow opening degree of the second throttling device until the initial liquid discharge pressure reaches the target liquid discharge pressure; for example, in one embodiment, the opening degrees of the three throttling devices are adjusted from 0 to 500 B, The initial opening of the three is 220-240B, T2 is set to 6 °C, and when 6 °C ≤ Δt, the first throttle device is controlled to adjust from the initial opening degree to the fifth flow rate at the opening rate of 5B/s. Degree 100-120B, the third throttling device is adjusted from the initial opening degree to the sixth flow opening degree 200-220B at an opening rate of 10 B/s, and the corresponding flow rate is reached at the first throttling device and the second throttling device. After adjusting the second quarter The flow rate of the flow device is such that the initial discharge pressure of the second throttle device reaches the target discharge pressure;

In the above embodiment, Δt is the temperature difference between the outdoor ambient temperature and the radiator temperature, the first opening rate <the second opening rate, the first flow opening <the second flow opening, the third flow opening < Four flow rate opening degree, fifth flow rate opening degree <sixth flow rate opening degree, first flow rate opening degree <third flow rate opening degree <fifth flow rate opening degree, second flow rate opening degree <fourth flow rate opening degree <sixth flow rate Opening degree.

In some embodiments of the present invention, the step of the controlling method further includes:

Obtaining the target indoor temperature and the initial indoor temperature input by the user; in the embodiment, the target indoor temperature is the heat exchange temperature of the indoor set by the user through the remote controller or the display panel, and the initial indoor temperature may be set to the sixth set on the indoor unit. Sensor detection;

Determining whether the outdoor temperature exceeds a preset outdoor temperature threshold; the outdoor temperature threshold may be pre-programmed into the program of the air conditioner core. In an embodiment, the outdoor temperature threshold is set to 诶35 ° C;

When the outdoor temperature does not exceed the preset outdoor temperature threshold, the first throttle device is gradually closed at a third opening rate, and the flow opening of the second throttle device and the third throttle device is adjusted according to the target indoor temperature. So that the initial indoor temperature reaches the target indoor temperature. For example, in one embodiment, the opening adjustment range of the three throttling devices is 0 to 500 B, and the initial opening of the three is 220 to 240 B. When the outdoor ambient temperature does not exceed the outdoor temperature threshold of 35 ° C, the first control is performed. The throttling device is gradually closed at an opening rate of 10 B/s until the opening degree becomes 0; in addition, the flow opening degree of the second throttling device and the third throttling device is adjusted according to the target indoor temperature so as to flow through the first After passing through the secondary throttling, the refrigerant of the pipeline enters the first heat exchanger of the indoor unit to perform normal refrigeration and heat exchange with the indoor environment.

In an embodiment of the present invention, as shown in FIG. 3, when the air conditioner operates the heating mode, the first throttle device, the second throttle device, and the third throttle device are adjusted according to the outdoor ambient temperature and the radiator temperature. The flow rate of opening, so that the initial discharge pressure reaches the target discharge pressure, the specific steps include:

When Tao<t1, the control maintains the flow opening degree of the first throttle device unchanged, the second throttle device adjusts from the initial opening degree to the seventh flow opening degree at the third opening degree rate, and adjusts the third throttle device The flow rate is opened until the initial discharge pressure reaches the target discharge pressure; for example, in one embodiment, the opening adjustment range of the three throttle devices is 0 to 500 B, and the initial opening of the three is 220 to 240 B. T1 is set to 0 ° C. When Tao < 0 ° C, the initial opening degree of the first throttle device is maintained, and the second throttle device is controlled to adjust from the initial opening degree to the seventh flow rate at an opening rate of 10 B/s. Opening degree 100-120B, after the second throttling device reaches the corresponding flow opening degree, adjusting the flow opening degree of the third throttling device, so that the initial outlet pressure of the second throttling device reaches the target outlet pressure;

When t1≤Tao<t2, the first throttle device is controlled to adjust from the initial opening degree to the eighth flow opening degree at the fourth opening degree rate, and the second throttle device is adjusted from the initial opening degree to the third opening degree rate to the third opening degree 9 flow opening degree, and adjusting the flow opening degree of the third throttle device until the initial liquid discharge pressure reaches the target liquid discharge pressure; for example, in one embodiment, the opening degree of the three throttle devices is adjusted from 0 to 500 B The initial opening of the three is 220 to 240B, and t1 is set to 0°C, t2 is 5°C, and when 0°C≤Tao<5°C, the first throttle device is controlled to adjust from the initial opening degree to the eighth flow opening degree 160-180B at the opening rate of 5B/s, the second section The flow device is adjusted from the initial opening degree to the ninth flow opening degree 120-140B at an opening rate of 10 B/s, and the third throttling is adjusted after the first throttling device and the second throttling device reach the corresponding flow opening degree. The flow opening of the device such that the initial discharge pressure of the second throttling device reaches the target discharge pressure;

When t3≤Tao, the first throttle device is controlled to adjust from the initial opening degree to the tenth flow opening degree at the fourth opening degree rate, and the second throttle device is adjusted from the initial opening degree to the eleventh at the third opening degree rate. Flow opening degree, and adjusting the flow opening degree of the third throttling device until the initial liquid discharge pressure reaches the target liquid discharge pressure; for example, in one embodiment, the opening degrees of the three throttling devices are adjusted from 0 to 500 B, The initial opening degree of the three is 220-240B, and t2 is 5°C. When 5°C≤Tao, the first throttling device is controlled to adjust from the initial opening degree to the eighth flow opening degree 180~ at an opening rate of 5B/s. 200B, the second throttling device is adjusted from the initial opening degree to the ninth flow opening degree 140-160B at an opening rate of 10 B/s, after the first throttling device and the second throttling device reach the corresponding flow opening degree, Adjusting the flow opening degree of the third throttle device so that the initial outlet pressure of the second throttle device reaches the target outlet pressure;

In the above embodiment, the Tao is the outdoor ambient temperature, the fourth opening rate <the third opening rate, the initial opening degree>the seventh flow opening degree, the eighth flow opening degree>the ninth flow opening degree, and the tenth flow opening degree > eleventh flow rate opening, eighth flow rate opening < tenth flow rate opening <initial opening degree, seventh amount opening degree <ninth flow rate opening degree <theventh flow rate opening degree.

As shown in FIG. 4 and FIG. 5, the second embodiment of the present invention discloses another control method for air conditioning operation, and the control method includes:

S401. Acquire an outdoor temperature threshold, a radiator temperature threshold, and a supplemental air temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the air supply temperature requirement is met;

Since the electronic control component is disposed in the outdoor unit, the outdoor temperature threshold set by the present invention is related to the temperature at which the electronic control component operates safely, and the outdoor temperature threshold value is used in the embodiment. 40 ° C, that is, 40 ° C as a temperature threshold to determine whether the electronic control component can operate safely; and the temperature upper limit of the heat sink temperature threshold is determined according to the safe operating temperature of the electronic control component, so as to exchange heat with the electronic control component The temperature of the heat sink is not greater than the safe working temperature of the electronic control component, thereby ensuring that the temperature of the electronic control component itself is not greater than its safe operating temperature.

Since the refrigerant flowing through the cooling pipe is returned to the compressor for gas supplementation, the first throttle device is adjusted to control the refrigerant supply air temperature, and the radiator temperature should also reach the preset air supply temperature condition. In order to avoid the temperature rise of the radiator caused by the opening of the first throttle device being too small, affecting the problem of cooling the electronic control unit.

S402. Obtain an outdoor temperature and a heat sink temperature.

In an embodiment, the outdoor temperature is detected by a first sensor disposed on the outdoor unit, and the temperature of the heat sink is detected by a third sensor disposed on the heat exchange fin or the heat exchange tube of the heat sink;

S403. When the outdoor temperature is greater than the outdoor temperature threshold and the radiator temperature is not greater than the radiator temperature threshold, adjust the flow opening degree of the first throttle device to make the radiator temperature meet the supplemental air temperature condition.

Since the heat exchanger of the outdoor unit is in the outdoor environment for heat exchange, the internal temperature of the outdoor unit is also increased, and the internal actual temperature is higher than the outdoor temperature. Therefore, after the outdoor temperature is greater than the outdoor temperature threshold, the control method of the present invention determines that the outdoor temperature is greater than the outdoor temperature threshold. It is also necessary to judge whether the temperature of the heat sink is greater than the temperature threshold of the heat sink to prevent the temperature of the electronic control component and the heat sink from being too high, which may affect the normal operation of the air conditioner.

When the outdoor temperature is greater than the outdoor temperature threshold, the external environment causes the internal temperature of the outdoor unit to be higher, and the temperature of the electronic control unit and the heat sink also increases. Therefore, the control method of the present invention controls the flow opening of the first throttle device. To adjust the flow rate of the refrigerant in the cooling pipeline so that the temperature of the radiator can be maintained below a preset temperature threshold, thereby enabling the heat dissipation of the electronic control component to be cooled, so that the electronic control component can be within a safe operating temperature range. Operation to improve the safety performance of the air conditioner during high temperature weather operation in summer; meanwhile, when the outdoor temperature is greater than the outdoor temperature threshold, the heat exchange between the outdoor unit and the outdoor environment is greatly affected by the outdoor temperature, and the second heat exchanger of the outdoor unit is The heat exchange temperature of the external environment is reduced, resulting in insufficient heat exchange amount, and the control method of the present invention transfers the refrigerant flowing through the cooling pipe to the compressor for gas supplementation, thereby increasing the compression ratio of the compressor to the refrigerant, so that the compression ratio of the compressor to the refrigerant is increased. The refrigerant in the outdoor heat exchanger can meet the heat exchange temperature and enthalpy demand, and enhance the heat exchange efficiency between the outdoor heat exchanger and the outdoor environment. High performance air-conditioning machine.

In the above step S401, the purpose of obtaining the heat sink temperature threshold of the air conditioner is that since the heat sink is directly used for cooling and cooling the electronic control component, the temperature of the heat sink can directly affect the operating temperature of the electronic control component, so The heat sink temperature threshold is set to make the electronic control component within a safe working temperature range after the heat sink cools the electronic control component.

In some embodiments, the step of obtaining the supplemental air temperature condition in the present invention comprises: determining the supplemental air temperature condition according to the outdoor temperature, and the supplemental air temperature condition is:

T _radiator = Tao + C,

Among them, the T _radiator is the radiator temperature, the Tao is the outdoor temperature, and C is the temperature adjustment parameter, and the value ranges from 3 to 6 °C. In the supplemental air temperature condition obtained by the invention, the temperature of the radiator is higher than the outdoor temperature, and the problem of condensation on the surface of the radiator caused by the temperature of the radiator being lower than the outdoor temperature can be reduced; meanwhile, the temperature of the radiator is also in the radiator Under the temperature threshold, it will not interfere with the heat dissipation of the electronic control components.

Optionally, the supplemental air temperature condition further includes a discharge temperature of the compressor corresponding to the refrigerant flowing back to the compressor when the refrigerant temperature requirement is met; in order to make the exhaust temperature of the compressor meet the refrigerant of the outdoor heat exchanger Temperature requirements, the steps of the control method of the present invention further include:

Detecting the exhaust temperature of the compressor. In the embodiment, the exhaust temperature is set at the exhaust port of the compressor. The fourth sensor is detected;

The exhaust gas temperature satisfies the supplemental air temperature condition by adjusting the flow rate of the first throttling device according to the exhaust gas temperature and the exhaust gas temperature threshold. For example, the purpose of the compressor air supply increase is to lower the exhaust gas temperature. Therefore, the exhaust gas temperature threshold of the present invention is a temperature upper limit value, and when the exhaust gas temperature of the compressor is below the upper temperature limit value, the refrigerant The temperature can meet the heat exchange requirement of the outdoor unit heat exchanger; therefore, the present invention adjusts the flow opening degree of the first throttle device so that the above-mentioned heat sink temperature and exhaust temperature can satisfy the corresponding air supply temperature conditions, Improve the operating efficiency of air conditioners.

In an embodiment of the present invention, the step S404 relates to adjusting the flow opening degree of the first throttle device so that the heat sink temperature satisfies the supplemental air temperature condition, and the specific steps include:

Determine whether the heat sink temperature is greater than the heat sink temperature threshold;

Since the temperature between the electronic control component and the heat sink interacts with each other, when the temperature of the heat sink is greater than the temperature threshold of the heat sink, it can be judged that the electronic control component is also in a high temperature environment, and the temperature should be lowered, so The invention controls to increase the flow opening degree of the first throttling device, so as to increase the flow rate of the refrigerant flowing through the cooling pipe, and increase the heat exchange amount between the radiator and the electric control component until the temperature of the radiator is not greater than the temperature threshold of the radiator;

When the temperature of the heat sink is not greater than the temperature threshold of the heat sink, it can be judged that the electronic control component is in a safe working temperature range, and the temperature difference between the heat sink and the electronic control component can be met between the heat sink and the electronic control component, so the control is closed first. The throttling device until the radiator temperature reaches the radiator temperature threshold, thereby reducing the loss of refrigerant flowing through the cooling line.

In still another embodiment of the present invention, the control method further includes: when the outdoor temperature is greater than the outdoor temperature threshold, controlling the air conditioner to close the first throttle device, the cooling conduit where the first throttle device is located is blocked, and is disposed on The second throttling device and the third throttling device on the first pipeline function similarly to the expansion valve in the conventional air conditioning system, and the inflow is controlled by controlling the flow opening of the second throttling device and the third throttling device. The refrigerant flow rate of the first heat exchanger, for example, when the flow rate of the second throttle device and the third throttle device is increased, the amount of refrigerant flowing into the first heat exchanger can be increased, thereby improving the indoor unit and the indoor environment. The heat exchange amount; similarly, when the flow opening degree of the second throttling device and the third throttling device is lowered, the amount of refrigerant flowing into the first heat exchanger can be reduced, thereby reducing the heat exchange between the indoor unit and the indoor environment. the amount.

In an embodiment, when the air conditioner is in the opening operation, the first throttle device, the second throttle device, and the third throttle device are respectively opened by the initial opening degrees S1, S2, and S3, and the initial opening degree may be the preset opening of the air conditioner. Degree, or the opening degree of each throttling device when the air conditioner was last operated; the control method of the present invention performs corresponding adjustment operations on the three throttling devices based on the initial opening degree.

In an embodiment of the invention, the steps of the control method of the present invention further include:

Obtaining the target indoor temperature input by the user, and the target indoor temperature is the indoor cooling temperature set by the user through the remote controller or the display panel;

Detecting a real-time indoor temperature of a space in which the air conditioner is located. In an embodiment, the real-time indoor temperature is detected by a second sensor disposed on the indoor unit of the air conditioner;

When the real-time indoor temperature is greater than the target indoor temperature, the air-conditioning control second throttling device is opened at the maximum flow opening degree, and the third throttling device is controlled to gradually increase the flow opening degree at the first opening rate. In the process, the second section The flow device and the third throttling device are respectively adjusted at different opening degrees because if the second and third are all turned on, high and low pressure difference cannot be formed, and both the indoor heat exchanger and the outdoor heat exchanger cannot be formed. Between the refrigerant circulation;

When the real-time indoor temperature is not greater than the target indoor temperature, the flow opening of the second throttle device and the third throttle device is controlled to be maintained.

In an embodiment of the invention, the control method further includes:

When the outdoor temperature is greater than the outdoor temperature threshold, the second throttle device is controlled to be opened at a medium flow opening to meet the refrigerant demand of the first heat exchanger and the radiator; and according to the real-time indoor temperature and the target indoor temperature, the control The three throttling device adjusts its flow opening at a second opening rate.

In an embodiment of the invention, the process of controlling the third throttle device to adjust the flow opening degree at the second opening rate according to the real-time indoor temperature and the target indoor temperature includes:

When the real-time indoor temperature is greater than the target indoor temperature, the third throttle device is controlled to gradually increase the flow opening degree at the second opening rate;

When the real-time indoor temperature is not greater than the target indoor temperature, the third throttling device is controlled to gradually decrease the flow opening degree at the second opening rate.

In the above-mentioned rate adjustment process of the throttle device, the flow rate opening degree is adjusted at a set opening rate or amplitude. Considering that the compressor and the system have a reaction time and a balancing process, the adjustment cannot be too fast, and the adjustment is too fast. It will cause the temperature to fluctuate too much and it is easy to produce noise. In addition, if the adjustment is too slow, it will affect the cooling effect. Therefore, it is necessary to adjust accordingly according to the speed preset by the air conditioning system.

As shown in FIG. 6 and FIG. 7, the third embodiment of the present invention discloses another control method for air conditioning operation, and the control method includes:

S601. Acquire an outdoor temperature threshold, a radiator temperature threshold, and a supplemental air temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the air supply temperature requirement is met.

Since the refrigerant flowing through the cooling pipe is returned to the compressor for gas supplementation, the first throttle device is adjusted to control the refrigerant supplemental temperature, and the radiator temperature should also be brought to the supplemental air temperature condition to avoid The temperature increase of the radiator caused by the opening of the first throttle device is too small, which affects the problem of cooling the electronic control unit.

S602, detecting an outdoor temperature of a space in which the air conditioner is located. In the embodiment, the outdoor temperature is detected by a first sensor disposed on the outdoor unit;

S603. When the outdoor temperature is not greater than the outdoor temperature threshold, detecting the temperature of the heat sink of the heat sink within a set time length;

In an embodiment, the outdoor temperature is detected by a second sensor disposed on the heat sink, and the set time length may be determined according to actual detection requirements, for example, 3 minutes, 5 minutes, etc., to reduce instantaneous or short-term changes in temperature. The resulting interference effects;

S604. Adjust the flow opening degree of the first throttle device when the heat dissipation temperature is not greater than the heat sink temperature threshold, so that the heat sink temperature reaches the supplemental air temperature condition.

In the embodiment, after the first throttling device is turned on, the refrigerant flows along the cooling pipe, and the heat sink is in the electronic control unit for heat exchange, thereby reducing the temperature of the electronic control component, and the second sensor detects the temperature of the heat sink. It can reflect the actual temperature condition of the electronic control component. When the temperature of the heat sink is not greater than the temperature threshold of the heat sink, the temperature of the electronic control component is also within the safe working temperature range. Meanwhile, in the above step S604, when the outdoor temperature is not greater than the outdoor temperature threshold, the heat exchange between the outdoor unit and the outdoor environment is less affected by the outdoor temperature, so as to further improve the heat exchange between the second heat exchanger of the outdoor unit and the external environment. The control method of the present invention transfers the refrigerant flowing through the cooling pipe to the compressor for gas supplementation, increases the compression ratio of the compressor to the refrigerant, and enables the refrigerant in the outdoor heat exchanger to satisfy the heat exchange temperature. And the depreciation demand enhances the heat exchange efficiency between the outdoor unit heat exchanger and the outdoor environment, and improves the performance of the air conditioner.

In an embodiment of the invention, the controlling method further comprises:

When the outdoor temperature is greater than the outdoor temperature threshold, the heat of the outdoor environment is transmitted to the heat sink and the electronic control component via the outdoor unit, causing the temperature of the electronic control component to rise, so it is necessary to control to open the first throttle device until the heat sink The temperature is not greater than the heat sink temperature threshold.

For example, the flow rate of the refrigerant flowing through the radiator can be increased by increasing the flow opening of the first throttling device to achieve the cooling and cooling of the electronic control component; or the difference between the outdoor temperature and the outdoor temperature threshold. The flow opening of the first throttling device is determined to enable the refrigerant flow to meet the demand for the amount of heat dissipating refrigerant.

In addition, when the temperature of the heat sink is greater than the temperature threshold of the heat sink, the first throttle device can be controlled to increase the heat exchange amount of the heat sink to the electronic control component, so that the heat sink temperature is not greater than the heat sink temperature threshold.

T _radiator = Tao + C,

Detecting the exhaust temperature of the compressor. In the embodiment, the exhaust temperature is detected by a fourth sensor disposed at a position of the exhaust port of the compressor;

The exhaust gas temperature satisfies the supplemental air temperature condition by adjusting the flow rate of the first throttling device according to the exhaust gas temperature and the exhaust gas temperature threshold. For example, the purpose of the compressor air supply increase is to lower the exhaust gas temperature. Therefore, the exhaust gas temperature threshold obtained by the present invention is a temperature upper limit value, and when the exhaust gas temperature of the compressor is below the upper temperature limit value, The temperature of the refrigerant can meet the heat exchange requirement of the outdoor heat exchanger; therefore, the present invention adjusts the flow opening degree of the first throttle device so that the above-mentioned heat sink temperature and exhaust temperature can satisfy the corresponding air supply temperature conditions. To improve the operating efficiency of the air conditioner.

In an embodiment of the present invention, the control method further includes:

Obtain real-time indoor temperature and user-set target indoor temperature;

In an embodiment, the real-time indoor temperature is detected by a third sensor disposed on the indoor unit by the facility air conditioner; and the target indoor temperature is a target indoor temperature set by the user to operate the air-conditioning indoor unit through the remote controller or the display panel;

The flow opening degree of the second throttle device and the third throttle device is determined according to a temperature difference between the real-time indoor temperature and the target indoor temperature and a flow opening degree of the first throttle device.

In an embodiment, since the first throttling device can be regarded as being connected in parallel with the first pipe in which the third throttling device is located, the flow rate of the refrigerant flowing through the second throttling device flows through the first throttling device and The sum of the refrigerant flow rates of the three throttling devices, so that the flow rate of the refrigerant that needs to flow to the first heat exchanger of the indoor unit can be determined by the temperature difference between the real-time indoor temperature and the target indoor temperature, and the flow rate of the refrigerant and the third throttle throttling device The flow opening degree is adapted; after that, the refrigerant flow rate of the second throttling device is obtained by adding the refrigerant flow rate of the first throttling device and the refrigerant flow rate of the third throttling device, and further determining according to the refrigerant flow rate of the second throttling device. Its flow opening.

In an embodiment of the present invention, the outdoor temperature threshold ranges from 38 ° C to 48 ° C. The specific value of the outdoor temperature threshold may be determined in advance according to factors such as the region, climate, and season of the air conditioner user.

In an embodiment of the present invention, the temperature threshold of the heat sink ranges from 55 ° C to 65 ° C, and the specific value of the heat sink temperature threshold is determined according to factors such as the type of the electronic control component, the material, and the rated safe operating temperature. .

As shown in FIG. 8 and FIG. 9, the fourth embodiment of the present invention discloses another control method for air conditioning operation, and the control method includes:

S801. Acquire an outdoor temperature threshold value and a supplemental air temperature condition, where the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the air supply temperature requirement is met;

The control method of the invention utilizes the residual heat of the electronic control component to increase the thermal load of the refrigerant, and causes the refrigerant to flow back to the compressor after the heat exchange to perform gas supplementation, thereby adjusting the first throttle device to control the refrigerant supplemental air temperature. The temperature of the heat sink should also be brought to the corresponding air supply temperature condition so that the refrigerant flowing through the heat sink can sufficiently exchange heat with the electronic control unit to supplement the heat load of the refrigerant.

S802. Detecting an outdoor temperature, an outdoor unit temperature, and a radiator temperature when the air conditioner operates in a heating mode;

In the embodiment, the outdoor temperature is detected by a first sensor disposed outside the outdoor unit, and the outdoor unit temperature is detected by a second sensor disposed inside the outdoor unit, and the temperature of the heat sink is detected by a fourth sensor disposed on the heat sink fin. get. Wherein, since the condensation on the first heat exchanger of the outdoor unit directly affects the heat exchange efficiency with the outdoor environment, the second sensor is disposed at a position adjacent to the first heat exchanger inside the outdoor unit to move the second sensor The measured temperature of the first heat exchanger is used as a parameter for determining whether the critical temperature of the condensation is reached in a subsequent step;

S803, when the outdoor temperature is not greater than the outdoor temperature threshold, and the outdoor unit temperature is not greater than the condensation critical temperature, the opening degree corresponding to the maximum flow rate is used as the reference opening degree of the first throttling device, and the opening degree of the first throttling device is adjusted. So that the heat sink temperature meets the supplemental air temperature condition.

In the embodiment, the invention uses the critical temperature of the condensation as a criterion for determining whether the compressor needs to be supplemented with air. In the air conditioning operation heating mode, the first heat exchanger of the outdoor unit exchanges heat with the surrounding air. The refrigerant in a heat exchanger absorbs heat and evaporates, causing the temperature of the surrounding air to decrease, and the outdoor machine still has a problem of condensation. Therefore, when the outdoor temperature is not greater than the outdoor temperature threshold, it is still necessary to determine whether the outdoor unit temperature is greater than the frosting threshold. temperature;

In the embodiment, when the outdoor unit temperature is not greater than the condensation critical temperature, the outdoor unit satisfies the frosting condition, and the surface of the first heat exchanger of the outdoor unit begins to appear frosting, in order to maintain the heat exchange efficiency of the first heat exchanger, It is necessary to perform a gas filling and augmenting operation on the compressor. In step S803, by controlling the opening of the first throttling device, the refrigerant flows along the cooling pipe, and the residual heat of the electronic control component is used to heat the refrigerant, so that the refrigerant can reach the qi supply. Increased refrigerant status requirements.

In the above process, the opening degree of the first throttling device is increased from the initial opening degree to the opening degree corresponding to the maximum flow rate or the first throttling device is controlled to be opened at the opening corresponding to the maximum flow rate to improve the overall refrigerant in the cooling pipe. The flow rate, thereby increasing the heat exchange amount between the refrigerant and the electronic control component, so that the refrigerant satisfies the refrigerant state requirement of the gas supplementation; meanwhile, since the temperature of the electronic control component and the heat sink is also affected by the outdoor environment, the control method of the present invention In the process, based on the opening degree corresponding to the maximum flow rate, the first throttle device is secondarily adjusted to change the heat sink and the electronic control component. The thermal process can continue.

T _radiator = Tao + C,

Among them, the T radiator is the radiator temperature, the Tao is the outdoor temperature, and C is the temperature adjustment parameter, and the value ranges from 3 to 6 °C. In the supplemental gas temperature condition of the invention, the temperature of the radiator is higher than the outdoor temperature, and the problem of condensation on the surface of the radiator caused by the temperature of the radiator being lower than the outdoor temperature can be reduced; meanwhile, the temperature of the radiator is also at the temperature threshold of the radiator. Underneath, it will not interfere with the heat dissipation of the electronic control components.

The exhaust gas temperature satisfies the supplemental air temperature condition by adjusting the flow rate of the first throttling device according to the exhaust gas temperature and the exhaust gas temperature threshold. For example, the purpose of the compressor air supply increase is to lower the exhaust gas temperature. Therefore, the exhaust gas temperature threshold of the present invention is a temperature upper limit value, and when the exhaust gas temperature of the compressor is below the upper temperature limit value, the refrigerant The temperature can meet the heat exchange requirement of the outdoor heat exchanger; therefore, the present invention adjusts the flow opening degree of the first throttle device so that the above-mentioned heat sink temperature and exhaust temperature can meet the corresponding air supply temperature conditions, thereby improving The operating efficiency of the air conditioner.

In an embodiment of the invention, the control method further comprises: determining a condensation critical temperature of the outdoor unit environment based on the outdoor temperature. Because of the seasonality, weather, climate and other factors in the area where the air conditioner user is located, the outdoor temperature changes. Therefore, for the critical temperature to be achieved by the outdoor unit condensation, the critical temperature of the condensation should be determined based on the measured outdoor temperature.

In an embodiment of the present invention, the control method further includes: when the outdoor unit temperature is greater than the condensation critical temperature, the opening degree corresponding to the maximum flow rate is used as the reference opening degree of the first throttling device, and the first throttling device is controlled to be lowered. The flow rate of the opening.

When the temperature of the outdoor unit is greater than the critical temperature of the condensation, the heat exchange between the outdoor unit and the outdoor environment is less affected by the outdoor temperature, and the control method of the present invention is used to ensure the heat exchange between the first heat exchanger of the outdoor unit and the external environment. The opening degree corresponding to the maximum flow rate is used as the reference opening degree of the first throttling device, and the flow opening degree of the first throttling device is controlled to be adjusted so that the refrigerant temperature of the supplemental air is adapted to the temperature of the outdoor environment, for example, In one embodiment, the maximum flow rate of the first throttle device corresponds to an opening degree of 500B, and when the outdoor unit temperature is greater than the frosting critical temperature, the first throttle device is controlled to be opened at a medium opening degree, specifically, the first section The opening of the flow device is reduced from 500B to 220B.

Similarly, when the outdoor temperature is greater than the outdoor temperature threshold, the opening corresponding to the maximum flow rate is used as the first throttle device. The reference opening degree is controlled to reduce the flow opening degree of the first throttling device, so that the refrigerant temperature of the supplemental air is adapted to the temperature of the outdoor environment.

In an embodiment of the present invention, the control method further includes:

Obtain real-time indoor temperature and user-set target indoor temperature;

The flow opening degree of the second throttle device and the third throttle device is adjusted according to a temperature difference between the real-time indoor temperature and the target indoor temperature and a flow opening degree of the first throttle device.

In an embodiment, since the first throttling device can be regarded as being connected in parallel with the first pipe in which the third throttling device is located, the flow rate of the refrigerant flowing through the second throttling device flows through the first throttling device and The sum of the refrigerant flow rates of the three throttling devices, so that the flow rate of the refrigerant that needs to flow to the second heat exchanger of the indoor unit can be determined by the temperature difference between the real-time indoor temperature and the target indoor temperature, the refrigerant flow rate and the third throttle throttling device The flow opening degree is adapted; after that, the refrigerant flow rate of the second throttling device is obtained by adding the refrigerant flow rate of the first throttling device and the refrigerant flow rate of the third throttling device, and further determining according to the refrigerant flow rate of the second throttling device. Its flow opening.

Correspondingly, in the first embodiment, the present invention further provides a control device for an air conditioner, which uses the control method disclosed in the above embodiment to perform corresponding control on the air conditioner. The device mainly includes:

An acquiring unit, configured to acquire a target outlet pressure of the second throttle device and an initial outlet pressure, wherein the target outlet pressure includes a second throttle device corresponding to the refrigerant flowing back to the compressor when the air supply pressure requirement is met Hydraulic pressure; and outdoor ambient temperature and radiator temperature detected by the air conditioner;

The main control unit is configured to adjust the flow opening degree of the first throttling device, the second throttling device and the third throttling device according to the outdoor ambient temperature and the radiator temperature, so that the initial discharge pressure reaches the target outlet pressure.

In some embodiments of the present invention, the obtaining unit is configured to: obtain an evaporation pressure and a condensing pressure detected by the air conditioner; determine a target liquid pressure according to the evaporation pressure and the condensing pressure; and calculate a target liquid pressure:

Among them, the P _{target discharge} is the target discharge pressure, P _o is the evaporation pressure, and P _k is the condensation pressure.

In some embodiments of the present invention, the main control unit is configured to: when 0≤Δt<T1, control the first throttle device to adjust from the initial opening degree to the first flow opening degree at the first opening rate, and third The throttle device is adjusted from the initial opening degree to the second flow rate opening at a second opening rate, and adjusts the flow opening degree of the second throttle device until the initial outlet pressure reaches the target outlet pressure; at T1 ≤ Δt < At T2, the first throttle device is controlled to adjust from the initial opening degree to the third flow opening degree at a first opening rate, and the third throttle device is adjusted from the initial opening degree to the fourth flow opening degree at a second opening rate. And adjusting the flow opening degree of the second throttling device until the initial liquid discharge pressure reaches the target liquid discharge pressure; when T2≤Δt, controlling the first throttling device to adjust from the initial opening degree to the fifth at the first opening rate The flow opening degree, the third throttling device is adjusted from the initial opening degree to the sixth flow opening degree at a second opening rate, and adjusting the flow opening degree of the second throttling device until the initial discharge pressure reaches the target outlet pressure; Where Δt is the outdoor ambient temperature and the radiator Temperature difference temperature, first opening rate <second opening rate, first flow opening <second flow opening, third flow opening <fourth flow opening, fifth flow opening <sixth flow The opening degree, the first flow rate opening degree <the third flow rate opening degree <the fifth flow rate opening degree, the second flow rate opening degree <the fourth flow rate opening degree <the sixth flow rate opening degree.

In some embodiments of the present invention, the acquiring unit is configured to acquire a target indoor temperature and an initial indoor temperature input by the user; the main control unit is configured to determine whether the outdoor temperature exceeds a preset outdoor temperature threshold; and the outdoor temperature does not exceed the preset The outdoor temperature threshold is controlled to gradually close the first throttling device at a third opening rate, and adjust the flow opening degree of the second throttling device and the third throttling device according to the target indoor temperature, so that the initial indoor temperature reaches the target Room temperature.

In some embodiments of the present invention, the main control unit is configured to: when Tao < t1, control to maintain the flow opening of the first throttle device unchanged, and the second throttle device to increase the initial opening degree at the third opening rate Adjusting to the seventh flow opening degree, and adjusting the flow opening degree of the third throttling device until the initial liquid discharge pressure reaches the target liquid discharge pressure; when t1≤Tao<t2, controlling the first throttling device to the fourth opening degree The rate is adjusted from the initial opening degree to the eighth flow opening degree, the second throttle device is adjusted from the initial opening degree to the ninth flow opening degree at the third opening degree rate, and the flow opening degree of the third throttle device is adjusted until the initial The outlet pressure reaches the target outlet pressure; when t3≤Tao, the first throttle device is controlled to adjust from the initial opening degree to the tenth flow opening degree at the fourth opening rate, and the second throttle device is to the third opening rate Adjusting from the initial opening degree to the eleventh flow opening degree, and adjusting the flow opening degree of the third throttling device until the initial liquid discharge pressure reaches the target outlet pressure; wherein, Tao is the outdoor ambient temperature, and the fourth opening degree rate is < Third opening rate, initial opening > seventh flow , the eighth flow opening degree> the ninth flow rate opening degree, the tenth flow rate opening degree> the eleventh flow rate opening degree, the eighth flow rate opening degree <the tenth flow rate opening degree <initial opening degree, the seventh quantity opening degree<ninth The flow opening degree <the eleventh flow rate opening degree.

Correspondingly, in the second embodiment, the present invention further provides a control device for an air conditioner, which uses the control method disclosed in the above embodiment to perform corresponding control on the air conditioner, and the control device includes:

And an acquisition unit, configured to obtain an outdoor temperature threshold and a radiator temperature threshold, and a supplemental air temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the air supply temperature requirement is met;

And configured to acquire an outdoor temperature detected by the first sensor and a heat sink temperature detected by the third sensor;

The main control unit is configured to adjust the flow opening degree of the first throttling device when the outdoor temperature is greater than the outdoor temperature threshold and the radiator temperature is not greater than the radiator temperature threshold, so that the radiator temperature satisfies the supplemental air temperature condition.

In some embodiments, the acquisition unit is configured to acquire a supplemental air temperature condition, and the supplemental air temperature condition includes:

T _radiator = Tao + C,

Among them, the T _radiator is the radiator temperature, the Tao is the outdoor temperature, and C is the temperature adjustment parameter, and the value ranges from 3 to 6 °C.

In some embodiments, the supplemental air temperature condition acquired by the control device of the present invention further includes an exhaust gas temperature of the compressor corresponding to the refrigerant flowing back to the compressor when the refrigerant temperature requirement is met; the obtaining unit is further configured to acquire the fourth The sensor detects the exhaust temperature of the obtained compressor; the main control unit is further configured to adjust the flow opening degree of the first throttle device according to the exhaust gas temperature and the exhaust gas temperature threshold so that the exhaust gas temperature satisfies the supplemental air temperature condition.

In some embodiments, the main control unit is further configured to: determine whether the heat sink temperature is greater than a heat sink temperature threshold; and when the heat sink temperature is greater than the heat sink temperature threshold, control to increase the flow opening of the first throttle device until the heat sink The temperature is not greater than the heat sink temperature threshold; when the heat sink temperature is not greater than the heat sink temperature threshold, the first throttle device is controlled to be turned off until the heat sink temperature reaches the heat sink temperature threshold.

In some embodiments, the acquiring unit is further configured to: acquire a target indoor temperature input by the user, and a real-time indoor temperature of the space where the air conditioner is detected by the second sensor; the main control unit is further configured to: the outdoor temperature is not greater than the outdoor temperature At the temperature threshold, the first throttle device is controlled to be closed, and the flow opening degrees of the second throttle device and the third throttle device are adjusted according to the real-time indoor temperature and the target indoor temperature.

In some embodiments, the main control unit is further configured to: when the real-time indoor temperature is greater than the target indoor temperature, control the second throttling device to be turned on at the maximum flow opening degree, and control the third throttling device to gradually increase at the first opening rate. The flow opening degree is controlled to maintain the flow opening degree of the second throttling device and the third throttling device when the real-time indoor temperature is not greater than the target indoor temperature.

In some embodiments, the main control unit is further configured to: when the outdoor temperature is greater than the outdoor temperature threshold, control the second throttle device to open at a medium flow opening, and control the third throttle according to the real-time indoor temperature and the target indoor temperature. The device adjusts its flow opening at a second opening rate.

In some embodiments, the main control unit is further configured to: when the real-time indoor temperature is greater than the target indoor temperature, control the third throttling device to gradually increase the flow opening degree at the second opening rate; and the real-time indoor temperature is not greater than the target indoor At the temperature, the third throttle device is controlled to gradually decrease its flow opening at a second opening rate.

In a third embodiment, the present invention further provides a control device for an air conditioner, which uses the control method disclosed in the above embodiment to perform heat dissipation and temperature reduction control on an electronic control component of the air conditioner, and the control device includes:

The obtaining unit is configured to obtain an outdoor temperature threshold, a radiator temperature threshold, and an air supplement temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the air supply temperature requirement is met;

An outdoor temperature for obtaining a space in which the air conditioner is detected by the first sensor; and a heat sink temperature detected by the second sensor for a set time length;

The main control unit is configured to adjust the flow rate of the first throttle device when the heat dissipation temperature is not greater than the heat sink temperature threshold The opening is such that the heat sink reaches the supplemental air temperature condition.

In some embodiments, the obtaining unit is configured to obtain a supplemental air temperature condition, including: determining an insufflation temperature condition according to the outdoor temperature, and the supplemental air temperature condition is:

T _radiator = Tao + C,

In some embodiments, the supplemental air temperature condition further includes an exhaust gas temperature of the compressor corresponding to the refrigerant flowing back to the compressor when the refrigerant temperature requirement is met; and the obtaining unit is further configured to: acquire the compressor detected by the fourth sensor Exhaust temperature; the main control unit is configured to: adjust the flow opening degree of the first throttling device according to the exhaust gas temperature and the exhaust gas temperature threshold, so that the exhaust gas temperature satisfies the supplemental air temperature condition.

In some embodiments, the main control unit is further configured to: when the outdoor temperature is greater than the outdoor temperature threshold, control to turn on the first throttle device until the heat sink temperature is not greater than the heat sink temperature threshold.

In some embodiments, the acquiring unit is further configured to: acquire a real-time indoor temperature detected by the third sensor, and a target indoor temperature set by the user; the main control unit is further configured to: perform a temperature difference according to the real-time indoor temperature and the target indoor temperature The value, the flow opening degree of the first throttling device, determines the flow opening degree of the second throttling device and the third throttling device.

In the fourth embodiment, the present invention further provides a control device for an air conditioner, which controls the air conditioner correspondingly by using the control method disclosed in the above embodiment. The control device includes:

An obtaining unit, configured to obtain an outdoor temperature threshold and a supplemental air temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the refrigerant temperature requirement is met;

The obtaining unit is configured to obtain an outdoor temperature, an outdoor unit temperature, and a radiator temperature detected when the air conditioner operates in the heating mode;

The main control unit is configured to adjust the first throttle when the outdoor temperature is not greater than the outdoor temperature threshold and the outdoor unit temperature is not greater than the condensation critical temperature, and the opening corresponding to the maximum flow rate is used as the reference opening of the first throttle device The opening of the device is such that the temperature of the heat sink satisfies the conditions of the supplemental air temperature.

T _radiator = Tao + C,

In some embodiments, the supplemental air temperature condition further includes an exhaust temperature of the compressor corresponding to the refrigerant flowing back to the compressor when the air supply temperature requirement is met; and the obtaining unit is further configured to detect the air conditioner when the heating mode is detected. Compression The exhaust temperature of the machine; the main control unit is configured to adjust the flow opening degree of the first throttle device according to the exhaust gas temperature and the exhaust gas temperature threshold so that the exhaust gas temperature satisfies the supplemental air temperature condition.

In some embodiments, the main control unit is further configured to determine a condensation critical temperature of the outdoor unit environment according to the outdoor temperature before determining whether the outdoor unit temperature is greater than a frosting critical temperature.

In some embodiments, the main control unit is further configured to: when the outdoor unit temperature is greater than the condensation critical temperature, the opening degree corresponding to the maximum flow rate is used as the reference opening degree of the first throttling device, and the control reduces the first throttling device. Flow opening.

In some embodiments, the acquiring unit is configured to obtain a real-time indoor temperature and a target indoor temperature set by the user; the main control unit is configured to use a temperature difference between the real-time indoor temperature and the target indoor temperature, and the flow opening of the first throttling device. And adjusting the flow opening degree of the second throttle device and the third throttle device.

The air conditioning structure applied to the control method and the control device in the above embodiment is as shown in FIG. 10, and the air conditioner includes an indoor unit and an outdoor unit, wherein the indoor unit includes a first heat exchanger 1 that exchanges heat with the indoor environment, and the outdoor unit The machine comprises a second heat exchanger 2 for exchanging heat with the outdoor environment, a compressor 3 for providing circulating power for the refrigerant, a computer board, a single chip microcomputer and the like, and the electric control is arranged in the outdoor unit, the first heat exchanger 1 and the second The heat exchanger 2 and the compressor 3 are connected through the first pipeline 4 and the second pipeline 5 for forming a conventional refrigerant circulation loop. In the embodiment, the air conditioner exchanges heat with the outdoor environment when the cooling mode is operated in the summer. The refrigerant flows out of the second heat exchanger 2, flows into the first heat exchanger 1 via the first line 4, and at the same time, the refrigerant exchanged with the indoor environment flows out of the first heat exchanger 1 through the second tube. The road 5 flows into the second heat exchanger 2, and through the refrigerant circulation process, the cooling and cooling function of the air conditioner to the indoor environment can be realized. Similarly, when the heating mode is operated in the winter, the refrigerant flows between the first heat exchanger 1 and the second heat exchanger 2 in a direction opposite to the cooling mode. It can realize the heating and heating function of the air conditioner to the indoor environment.

In addition to the conventional refrigerant circulation circuit described above, the air conditioner of the present invention further includes a cooling tube group for solving the problem of excessive temperature during operation of the electric control.

Specifically, the cooling pipe group mainly includes a cooling component and a cooling pipe 9 , wherein the cooling component mainly comprises:

The flasher 6 and the flasher 6 are connected to the first pipeline 4, and a part of the liquid refrigerant flowing through the first pipeline 4 can be evaporated into a gaseous refrigerant, and the gaseous refrigerant is sent to the cooling pipeline 9, thereby utilizing The gaseous refrigerant acts as a heat exchange medium in the subsequent cooling process of the cooling line 9;

The first throttling device 801 is disposed on the first pipeline 4 for adjusting the flow rate of the gaseous refrigerant in the cooling pipeline 9, and adjusting the pressure and temperature of the refrigerant after the heat exchange of the electric control, so as to make the inflow compression The refrigerant of the machine 3 can meet the needs of the compressor 3 to increase the gas;

The radiator 7 is connected to the cooling pipe 9 and adjacent to the electric control. Since the electric control is mostly disposed in a semi-closed container such as an electric control box, the radiator 7 can be used as a gas refrigerant and a change of air around the electric control. The heat carrier can lower the temperature of the electric control itself below the safe working temperature by cooling the ambient air of the electronic control unit. The specific structure and type of the heat sink 7 can be determined according to the structure of the outdoor unit. In the embodiment, the type of the heat sink 7 disposed on the cooling line 9 is a flat flow heat exchanger, and the flat flow heat exchanger has a high heat exchange rate and a small space occupation. Advantages, suitable for a compact outdoor air conditioner structure.

The flow sequence of the refrigerant used for cooling the heat control in the cooling pipe group is: first pipe 4 → flasher 6 → radiator 7 → compressor 3, and the first throttle device 801 can be set to flash as needed On the cooling line 9 between the generator 6 and the compressor 3.

In the air-conditioning and enthalpy structure of the conventional air conditioner, the refrigerant in the refrigerant pipeline is directly sent to the compressor 3. In this process, the parameters such as the temperature and pressure of the refrigerant do not change much, but in the present invention. In the air conditioner, the temperature of the gaseous refrigerant flowing through the radiator 7 is increased and the pressure is increased, thereby reducing the compression efficiency of the compressor 3 against the refrigerant. To solve this problem, in one embodiment of the present invention, the air conditioner is further The second throttling device 802 and the third throttling device 803 are included, wherein the second throttling device 802 is disposed on the first conduit 4 between the second heat exchanger 2 and the flasher 6, the third throttle The device 803 is disposed on the first pipeline 4 between the first heat exchanger 1 and the flasher 6, and the air conditioner is provided with the second throttle device 802 and the third throttle device as compared with the conventional air-enhanced air conditioning structure. The device 803 has an advantage in that, in the air conditioning operation cooling mode, the liquid refrigerant is disposed between the second heat exchanger 2 and the flasher 6 before flowing into the flasher 6 from the second heat exchanger 2 of the outdoor unit. The second throttling device 802 can throttle the refrigerant in one step, reduce the pressure of the refrigerant, and facilitate the flashing. The hair unit 6 evaporates the liquid refrigerant into a gaseous refrigerant, and at the same time, because the temperature of the refrigerant is lower, the amount of heat exchange of the refrigerant at the radiator 7 can also be increased. In an embodiment of the invention, the first throttling device is adjusted. The opening degree of the 801 and the second throttling device 802 can adjust the flow rate of the refrigerant in the cooling pipe 9, and the temperature and pressure of the refrigerant flowing from the first throttling device 801 to the compressor 3 can be changed from the second The temperature and pressure of the refrigerant flowing from the heater 2 to the second throttle device 802 are lower.

Since part of the liquid refrigerant flows into the cooling line 9 in the form of gaseous refrigerant at the flasher 6, in order to ensure that the temperature and pressure of the first heat exchanger 1 flowing into the indoor unit meet the actual indoor heat exchange demand, the first change is set. The third throttle device 803 between the heater 1 and the flasher 6 can function as a throttle expansion valve for regulating parameters such as temperature and pressure of the refrigerant flowing out of the flasher 6.

The above embodiment is an example in which the air conditioning mode is operated under high temperature conditions in summer. Similarly, in the low temperature condition in winter, the outdoor low temperature condition will affect the heat exchange between the outdoor unit and the outdoor environment, and the air conditioning operation heating mode is ensured. At the same time, the heating capacity of the compressor 3 also needs to perform the air supply and the increase operation of the compressor 3, and in the air conditioning operation heating mode, the flow direction of the refrigerant in the air conditioning pipeline is opposite to the cooling mode, and at this time, the first heat exchanger is disposed. 1 and flasher 6 The third throttling device 803 can serve as a throttling function of the second throttling device 802 under cooling conditions, and first adjusts parameters such as temperature and pressure of the refrigerant flowing into the flasher 6 in a stepwise manner, and the second throttling The device 802 functions as a cut-off expansion valve for adjusting parameters such as temperature and pressure of the refrigerant flowing out of the flasher 6 and flowing into the second heat exchanger 2 of the outdoor unit. In order to realize the refrigerant conditioning process under the above two operating conditions, the second throttling device 802 and the third throttling device 803 employed in the present invention are bidirectional throttling devices.

The outdoor unit of the air conditioner further includes a gas-liquid separator 10 for storing and delivering the refrigerant to the compressor 3. The compressor 3 includes at least a primary compression portion and a secondary compression portion, and the connection between the primary compression portion and the secondary compression portion There is a mixing portion, wherein the primary compression portion is used for first-stage compression of the refrigerant flowing into the gas-liquid separator 10, and the mixing portion is used for mixing the refrigerant flowing into the cooling conduit 9 and the refrigerant subjected to the primary compression, and the secondary compression The part is used for secondary compression of the mixed refrigerant, so that the refrigerant outputted by the compressor 3 can meet the temperature and pressure required for the external heat exchange of the second heat exchanger 2 of the outdoor unit.

Meanwhile, the air return port of the compressor 3 includes a first air return port that communicates with the primary compression portion and the gas-liquid separator 10, and a second air return port that communicates the mixing portion and the radiator 7 to allow the refrigerant in the different refrigerant flow lines to flow in. Corresponding to the internal structure of the compressor 3.

Optionally, the compressor 3 of the present invention adopts the existing intermediate air supply compressor 3, the mixing portion is the intermediate air supply chamber of the intermediate air supply compressor 3, and the second air return port is the supplement of the intermediate air supply compressor 3. Air port.

In one embodiment of the present invention, the flasher 6 is connected in series with the first conduit 4, and the main structure of the flasher 6 includes a liquid refrigerant portion and a gaseous refrigerant portion in communication with the liquid refrigerant portion, wherein the liquid refrigerant portion There is a liquid inlet and a liquid outlet connected in series with the first conduit 4, and a first air outlet for the gaseous refrigerant to flow to the gaseous refrigerant portion, and the gaseous refrigerant portion further has a second air outlet communicating with the cooling conduit 9.

Correspondingly, the radiator 7 has an inlet end that communicates with the second outlet of the gaseous refrigerant portion and an outlet end that communicates with the second return port of the compressor 3.

In another embodiment of the present invention, the flasher 6 is connected in parallel with the first pipeline 4, and the parallel pipeline section of the first pipeline 4 corresponding to the flasher 6 is provided with a shut-off valve, which can be controlled by the first section. The flow device 801 and the shut-off valve are opened or closed to turn on or block the refrigerant pipeline where the flasher 6 is located and the corresponding parallel pipeline section. For example, the first throttle device can be closed by opening the shut-off valve of the parallel pipeline section. 801, the refrigerant does not flow through the cooling pipe 9, and is suitable for the case where the electric control generates less heat and the temperature is kept below the safe working temperature, and is also applicable to the working condition that the compressor 3 does not need to be supplemented with air.

At the same time, for the above-mentioned parallel connection form of the flasher 6, the amount of refrigerant flowing into the first heat exchanger 1 of the indoor unit and the heat dissipation for the electric control can be adjusted by controlling the flow opening degree of the first throttle device 801 and the shutoff valve. Or the amount of refrigerant in the compressor 3 is increased to maintain the optimum working condition of the air conditioner.

Optionally, the first throttling device 801 in the cooling assembly is disposed on the cooling pipe 9 between the radiator 7 and the compressor 3, and can not only adjust the flow rate of the refrigerant in the cooling pipe 9, but also expand The function of the valve is to perform secondary throttling of the gaseous refrigerant to reduce the temperature and pressure of the refrigerant, thereby improving the compression efficiency of the compressor 3 for the mixed refrigerant.

In an embodiment of the present invention, the air conditioner is provided with a first sensor for detecting the temperature of the room, and the opening degrees of the first throttle device 801 and the second throttle device 802 may be adjusted according to the detected indoor temperature to satisfy the pair. The amount of refrigerant required for heat exchange in an indoor environment.

As shown in FIG. 11 and FIG. 12, taking the cooling mode as an example, during the flow of the air conditioner, the change of the enthalpy value and the entropy value is: the refrigerant at the state point A flows from the first air return port to the compressor 3 After the primary compression portion is compressed to the state point B, it flows into the mixing portion, and at the same time, the refrigerant in the cooling pipe 9 is throttled at the state point K by the first throttle device 801 or the like, and is second by the compressor 3. The air return port flows into the mixing portion of the compressor 3, and is mixed with the refrigerant at the state point B to become the refrigerant at the state point C. The secondary compression portion of the compressor 3 continues the secondary compression of the refrigerant, and is isentropically compressed to be The refrigerant at the state point D; the compressor 3 inputs the refrigerant at the state point D into the second heat exchanger 2, is cooled by the outdoor environment to the liquid point E; the refrigerant enters the first line 4 along the outlet of the second heat exchanger 2, The second throttle device 802 or the like throttles to the state point F, and then flows into the flasher 6; the refrigerant flowing out from the liquid outlet of the liquid refrigerant portion of the flasher 6 is at the state point G, and passes through the third flow device section. Flows to the state point I, enters the first heat exchanger 1 and undergoes heat absorption and evaporation to become a state point L And then returned to the gas-liquid separator 10 through the second line 5; at the same time, the gaseous refrigerant exiting from the second outlet of the gaseous refrigerant portion of the flasher 6 is at the state point H, flowing through the parallel flow heat exchanger, and After the heat exchanger exchanges heat, it becomes the state point J, and then the refrigerant is stepped down by the first throttle device 801 to become the state point K, and is again flown into the mixing portion of the compressor 3 from the second air return port of the compressor 3.

In the above-mentioned refrigerant circulation of the present invention, in order to achieve the mutual interference effect of reducing the temperature drop of the electric control and the air supply and the increase of the compressor 3, the first throttle device 801, the second throttle device 802, and the third may be controlled. The flow rate of the throttle device 803 is realized. For example, in the above-described embodiment, the refrigerant flowing out of the second heat exchanger 2 of the outdoor unit is throttled by the second throttle device 802, and the refrigerant is The state point E becomes F, the process is equal to throttling, the enthalpy of the refrigerant is constant, the pressure is decreased, and the entropy value is increased, the temperature is lowered; the refrigerant flowing through the first throttling device 801 is changed from the state point J to the state. Point K, the process is also equal to throttling, the enthalpy of the refrigerant is constant, the pressure is reduced, the entropy value is increased, the temperature is lowered, and the efficiency of the secondary compression of the mixed refrigerant by the compressor 3 is improved; from the flasher 6 The refrigerant flowing to the third throttling device 803 is changed from the state point G to the state point I, and the process is equal to throttling, the enthalpy of the refrigerant is constant, the pressure is lowered, and the entropy value is increased, the temperature is lowered, thereby increasing the refrigerant entering. After the first heat exchanger 1 of the indoor unit, with the indoor ring Cooling heat exchanger.

In an embodiment of the invention, the air conditioner is provided with an evaporation pressure or a condensation pressure for detecting the first heat exchanger a first sensor of force, a second sensor for detecting an evaporation pressure or a condensation pressure of the second heat exchanger, a third sensor for detecting an outlet pressure of the first throttle device, and a second throttle device for detecting a fourth sensor for discharging pressure, and a fifth sensor for detecting the suction pressure and the exhaust pressure of the compressor, and adjusting the first throttle device 801 and the second throttle device according to the detected relevant pressure parameter The 802 and the third throttling device 803 are configured to increase or decrease the flow rate of the refrigerant for dissipating heat from the electric control without affecting the heat exchange efficiency of the room.

It is to be understood that the invention is not to be construed as being limited to The scope of the invention is limited only by the appended claims.

Claims

A method for controlling an air conditioner, comprising:

Obtaining a target outlet pressure and an initial outlet pressure of the second throttle device, wherein the target outlet pressure includes a discharge pressure of the second throttle device corresponding to the refrigerant flowing back to the compressor when the refrigerant pressure requirement is met;

Detect outdoor ambient temperature and radiator temperature;

Adjusting a flow opening degree of the first throttle device, the second throttle device, and the third throttle device according to the outdoor ambient temperature and the heat sink temperature, so that the initial liquid discharge pressure reaches the target liquid discharge pressure .
The control method according to claim 1, wherein the control method further comprises:

Obtaining the target indoor temperature and initial indoor temperature input by the user;

When the outdoor temperature does not exceed the preset outdoor temperature threshold, the first throttle device is gradually closed at a third opening rate, and the flow rates of the second throttle device and the third throttle device are adjusted according to the target indoor temperature. The initial indoor temperature is brought to the target indoor temperature.
The control method according to claim 1, wherein the control method further comprises:

Adjusting a flow opening degree of the first throttle device, the second throttle device, and the third throttle device according to the outdoor ambient temperature and the heatsink temperature when the air conditioner operates the heating mode, so that the initial exit The hydraulic pressure reaches the target outlet pressure, including:

When Tao<t1, the control maintains the flow opening of the first throttle device unchanged, the second throttle device adjusts from the initial opening degree to the seventh flow opening degree at the third opening rate, and adjusts the third section. The flow opening of the flow device is such that the initial discharge pressure reaches the target discharge pressure;

When t1≤Tao<t2, the first throttle device is controlled to adjust from the initial opening degree to the eighth flow opening degree at the fourth opening degree rate, and the second throttle device is adjusted from the initial opening degree to the third opening degree rate to the third opening degree Nine flow opening degree, and adjusting the flow opening degree of the third throttle device, so that the initial liquid discharge pressure reaches the target discharge pressure;

When t3≤Tao, the first throttle device is controlled to adjust from the initial opening degree to the tenth flow opening degree at the fourth opening degree rate, and the second throttle device is adjusted from the initial opening degree to the eleventh at the third opening degree rate. a flow opening degree, and adjusting a flow opening degree of the third throttling device, so that the initial liquid discharge pressure reaches the target liquid discharge pressure;

Wherein, Tao is the outdoor ambient temperature, the fourth opening rate <the third opening rate, the initial opening degree>the seventh flow opening degree, the eighth flow opening degree>the ninth flow opening degree, and the tenth flow opening degree> The eleventh flow rate opening degree, the eighth flow rate opening degree <the tenth flow rate opening degree <initial opening degree, the seventh quantity opening degree <the ninth flow rate opening degree <the eleventh flow rate opening degree.
A method for controlling an air conditioner, characterized in that the control method comprises:

Obtaining an outdoor temperature threshold, a radiator temperature threshold, and a supplemental air temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the refrigerant temperature requirement is met;

Obtain outdoor temperature and radiator temperature;

When the outdoor temperature is greater than the outdoor temperature threshold, and the heat sink temperature is not greater than the heat sink temperature threshold, the flow opening degree of the first throttle device is adjusted such that the heat sink temperature satisfies the supplemental air temperature condition.
A method for controlling an air conditioner, characterized in that the control method comprises:

Obtaining an outdoor temperature threshold, a radiator temperature threshold, and a supplemental air temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the refrigerant temperature requirement is met;

Detecting an outdoor temperature of a space in which the air conditioner is located;

And detecting, when the outdoor temperature is not greater than an outdoor temperature threshold, detecting a temperature of the heat sink of the heat sink within a set time length;

When the heat dissipation temperature is not greater than the heat sink temperature threshold, the flow opening degree of the first throttle device is adjusted such that the heat dissipation temperature reaches the supplemental air temperature condition.
A method for controlling an air conditioner, characterized in that the control method comprises:

Obtaining an outdoor temperature threshold and a supplemental air temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the air supply temperature requirement is met;

Detecting outdoor temperature, outdoor unit temperature and radiator temperature when air conditioning is operating in heating mode;

Adjusting the first throttle when the outdoor temperature is not greater than an outdoor temperature threshold, and the outdoor unit temperature is not greater than a condensation threshold temperature, the opening degree corresponding to the maximum flow rate is used as a reference opening degree of the first throttle device The opening of the device is such that the temperature of the heat sink satisfies the condition of the supplemental air temperature.
A control device for an air conditioner, comprising:

An acquiring unit, configured to acquire a target outlet pressure and an initial outlet pressure of the second throttle device, wherein the target outlet pressure includes a second throttle device corresponding to the refrigerant flowing back to the compressor when the air supply pressure requirement is met The outlet pressure; and the outdoor ambient temperature and radiator temperature detected by the air conditioner;

a main control unit, configured to adjust a flow opening degree of the first throttling device, the second throttling device and the third throttling device according to the outdoor ambient temperature and the radiator temperature, so that the initial liquid discharge pressure is reached The target outlet pressure.
The control device according to claim 7, wherein

The acquiring unit is configured to acquire a target indoor temperature and an initial indoor temperature input by the user;

The main control unit is configured to control the first throttle device to be gradually closed at a third opening rate when the outdoor temperature does not exceed the preset outdoor temperature threshold, and adjust the second throttle device according to the target indoor temperature The flow opening of the three throttling device causes the initial indoor temperature to reach the target indoor temperature.
The control device according to claim 7, wherein the main control unit is configured to:

When Tao<t1, the control maintains the flow opening of the first throttle device unchanged, the second throttle device adjusts from the initial opening degree to the seventh flow opening degree at the third opening rate, and adjusts the third section. Flow rate of the flow device Said that the initial outlet pressure reaches the target outlet pressure;

When t1≤Tao<t2, the first throttle device is controlled to adjust from the initial opening degree to the eighth flow opening degree at the fourth opening degree rate, and the second throttle device is adjusted from the initial opening degree to the third opening degree rate to the third opening degree Nine flow opening degree, and adjusting the flow opening degree of the third throttle device, so that the initial liquid discharge pressure reaches the target discharge pressure;

When t3≤Tao, the first throttle device is controlled to adjust from the initial opening degree to the tenth flow opening degree at the fourth opening degree rate, and the second throttle device is adjusted from the initial opening degree to the eleventh at the third opening degree rate. a flow opening degree, and adjusting a flow opening degree of the third throttling device, so that the initial liquid discharge pressure reaches the target liquid discharge pressure;

Wherein, Tao is the outdoor ambient temperature, the fourth opening rate <the third opening rate, the initial opening degree>the seventh flow opening degree, the eighth flow opening degree>the ninth flow opening degree, and the tenth flow opening degree> The eleventh flow rate opening degree, the eighth flow rate opening degree <the tenth flow rate opening degree <initial opening degree, the seventh quantity opening degree <the ninth flow rate opening degree <the eleventh flow rate opening degree.
A control device for an air conditioner, characterized in that the control device comprises:

An obtaining unit, configured to obtain an outdoor temperature threshold and a heat sink temperature threshold, and a supplemental air temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when satisfying a supplemental air temperature requirement;

And configured to acquire an outdoor temperature detected by the first sensor and a heat sink temperature detected by the third sensor;

a main control unit, configured to adjust a flow opening degree of the first throttling device when the outdoor temperature is greater than an outdoor temperature threshold and the radiator temperature is not greater than the radiator temperature threshold, so that the radiator temperature satisfies the supplement Gas temperature conditions.
The control device according to claim 10, wherein the main control unit is further configured to:

When the temperature of the heat sink is greater than the temperature threshold of the heat sink, increase the flow rate of the first throttle device so that the temperature of the heat sink is not greater than the temperature threshold of the heat sink;

When the temperature of the heat sink is not greater than a temperature threshold of the heat sink, the first throttle device is turned off to bring the heat sink temperature to the heat sink temperature threshold.
A control device for an air conditioner, characterized in that the control device comprises:

The obtaining unit is configured to obtain an outdoor temperature threshold, a radiator temperature threshold, and an air supplement temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the air supply temperature requirement is met; as well as

And an outdoor temperature for acquiring a space in which the air conditioner is detected by the first sensor; and a heat sink temperature of the heat sink detected by the second sensor within a set time length;

a main control unit, configured to adjust the first throttle when the heat dissipation temperature is not greater than a heat sink temperature threshold The flow rate is set such that the heat sink temperature reaches the supplemental air temperature condition.
The control device according to claim 12, characterized in that

The main control unit is further configured to: when the outdoor temperature is greater than an outdoor temperature threshold, turn on the first throttling device, so that the heat sink temperature is not greater than the heat sink temperature threshold; or When the temperature is greater than the temperature threshold of the heat sink, the first throttling device is turned on, so that the temperature of the heat sink is not greater than the temperature threshold of the heat sink.
A control device for an air conditioner, characterized in that the control device comprises:

An obtaining unit, configured to obtain an outdoor temperature threshold and a supplemental air temperature condition, wherein the supplemental air temperature condition includes a heat sink temperature corresponding to a refrigerant flowing back to the compressor when the refrigerant temperature requirement is met;

It is used to obtain the outdoor temperature, outdoor unit temperature and radiator temperature detected during the air conditioning operation heating mode;

The main control unit is configured to adjust the opening degree corresponding to the maximum flow rate as the reference opening degree of the first throttling device when the outdoor temperature is not greater than the outdoor temperature threshold, and the outdoor unit temperature is not greater than the condensation critical temperature. The opening of the first throttle device causes the heat sink temperature to satisfy the supplemental air temperature condition.
The control device according to claim 14, wherein the main control unit is further configured to:

When the outdoor unit temperature is greater than the frosting critical temperature, the opening degree corresponding to the maximum flow rate is used as the reference opening degree of the first throttling device, and the flow opening degree of the first throttling device is controlled to be reduced; or

When the outdoor temperature is greater than the outdoor temperature threshold, the opening degree corresponding to the maximum flow rate is used as the reference opening degree of the first throttle device, and the flow rate opening of the first throttle device is controlled to decrease.
An air conditioner, comprising: an indoor unit having a first heat exchanger; an outdoor unit having a second heat exchanger and a compressor, wherein the electric control is located in the outdoor unit, the first The heat exchanger, the second heat exchanger and the compressor are connected by a first pipeline and a second pipeline for forming a refrigerant circulation loop, the air conditioner further comprising a cooling component, the cooling component having a flasher, a flow device and a heat sink for dissipating heat for the electric control, wherein the flasher is connected to the first pipeline, and the radiator is respectively connected to a gas inlet of the compressor through a cooling pipeline The flasher is in communication, the first throttle device is disposed on the cooling line between the compressor and the flasher, and the air conditioner has a second heat exchanger disposed on the a second throttling device on the first line between the flashers, and a third throttling device disposed on the first line between the first heat exchanger and the flasher The air conditioner is provided with an evaporation pressure or a condensing pressure for detecting the first heat exchanger a sensor, a second sensor for detecting an evaporation pressure or a condensing pressure of the second sensor, a third sensor for detecting an outlet pressure of the second throttle device, and a temperature for detecting the outdoor ambient temperature A fourth sensor, a fifth sensor for detecting the temperature of the heat sink, and a sixth sensor for detecting an ambient temperature of the room.