WO2018094912A1

WO2018094912A1 - Control method for compressor, apparatus and household appliance

Info

Publication number: WO2018094912A1
Application number: PCT/CN2017/076206
Authority: WO
Inventors: 黄招彬
Original assignee: 广东美的制冷设备有限公司
Priority date: 2016-11-25
Filing date: 2017-03-09
Publication date: 2018-05-31
Also published as: CN106481537A; CN106481537B

Abstract

A control method for a compressor, an apparatus and a household appliance, the control method comprising the following steps: acquiring the temperature of a heating component in an input circuit of a compressor, and acquiring an operating temperature threshold value corresponding to the heating component; according to the temperature of the heating component and the operating temperature threshold value corresponding to the heating component, adjusting the operating frequency of the compressor. Thus, by means of adjusting the operating frequency of a compressor, the goals of reducing the temperature of a heating component in an input circuit and reducing an input current may be achieved.

Description

Compressor control method, device and household appliance

Technical field

The present invention relates to the field of motor control technologies, and in particular, to a control method of a compressor, a control device for the compressor, and a household appliance having the same.

Background technique

In a single-phase AC power input system such as a home air conditioner, a single-phase AC power source from the power grid usually passes through an uncontrollable full-bridge rectifier circuit, and then a PFC (Power Factor Correction) circuit outputs DC power and is connected to Large capacity electrolytic capacitors and loads (such as compressors, fans, internal switching power supplies, etc.).

Among them, the PFC circuit can adopt a typical Boost type PFC circuit, which can not only achieve a higher power factor, but also can boost the output of a stable DC voltage, thereby providing a stable DC power supply to the load. Thus, when the AC voltage of the single-phase AC power input system is low, the DC bus voltage can still reach a higher amplitude due to the boosting action of the PFC circuit, so that the compressor runs to a higher frequency. However, when the AC voltage is normal, when the amplitude of the AC voltage is low, the amplitude of the input current input to the PFC circuit increases, causing the device in the input circuit to generate heat. Especially for an air conditioning system that uses an AC fan to dissipate heat, the speed of the AC fan decreases as the amplitude of the AC voltage decreases, thereby reducing the heat dissipation capability of the air conditioning system, resulting in more serious heat generation in the input circuit.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. Accordingly, it is an object of the present invention to provide a control method for a compressor that achieves the purpose of reducing the temperature of the heat generating device in the input circuit and reducing the input current by adjusting the operating frequency of the compressor.

Another object of the present invention is to provide a control device for a compressor.

Still another object of the present invention is to provide a home appliance.

Still another object of the present invention is to provide an apparatus.

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

In order to achieve the above object, an embodiment of the present invention provides a control method of a compressor, comprising the steps of: acquiring a temperature of a heat generating device in an input circuit of a compressor, and acquiring an operating temperature threshold corresponding to the heat generating device; And adjusting an operating frequency of the compressor according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device.

According to the control method of the compressor according to the embodiment of the present invention, during the operation of the compressor, the temperature of the heat generating device in the input circuit of the compressor is acquired in real time, and the operating temperature threshold corresponding to the heat generating device is obtained, and then according to the heat generating device The temperature and the operating temperature threshold corresponding to the heat generating device adjust the operating frequency of the compressor. Therefore, the purpose of reducing the temperature of the heat generating device in the input circuit and reducing the input current is achieved by adjusting the operating frequency of the compressor.

In an embodiment of the invention, when the input circuit uses a passive power factor correction PFC circuit, the heat generating device includes one or more of a common mode inductor, a rectifier bridge, a PFC inductor, a diode, and an electrolytic capacitor; When the input circuit uses a Boost type PFC circuit, the heat generating device includes one or more of a common mode inductor, a rectifier bridge, a PFC inductor, a power switch tube, a diode, and an electrolytic capacitor.

According to an embodiment of the present invention, when the operating frequency of the compressor is adjusted by a rod control method according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device, wherein When the temperature of the heat generating device is greater than the operating temperature threshold in the input circuit, the operating frequency of the compressor is gradually decreased until the temperature of the heat generating device is less than a corresponding operating temperature threshold; when the input circuit is When the temperature of the heat generating device is less than the corresponding operating temperature threshold, the operating frequency of the compressor is gradually increased until the operating frequency of the compressor reaches the target operating frequency.

According to another embodiment of the present invention, when the operating frequency of the compressor is adjusted in a hysteresis control manner according to the temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device, wherein When the temperature of the heat generating device is greater than the operating temperature threshold in the input circuit, the operating frequency of the compressor is gradually decreased until the temperature of the heat generating device is less than a corresponding operating temperature threshold; when the input circuit When the temperature of the heat generating device is less than the minimum value of the temperature dead zone corresponding to the heat generating device, the operating frequency of the compressor is gradually increased until the operating frequency of the compressor reaches the target operating frequency, wherein The maximum value of the temperature dead zone is the operating temperature threshold; otherwise, the operating frequency of the compressor is kept constant.

According to still another embodiment of the present invention, when the operating frequency of the compressor is adjusted by a proportional integral control method according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device, wherein the calculating Determining a difference between an operating temperature threshold of the heat generating device and a temperature of the heat generating device; performing proportional integral adjustment on a difference between an operating temperature threshold of the heat generating device and a temperature of the heat generating device to obtain a first value Performing a limiting process on the first value to obtain a target operating frequency correction value of the compressor; and superimposing the target operating frequency correction value on a target operating frequency of the compressor to obtain the compressor Actual target operating frequency.

In order to achieve the above object, a control device for a compressor according to another embodiment of the present invention includes: a temperature acquisition module for acquiring a temperature of a heat generating device in an input circuit of the compressor; a control module, the control module and The temperature acquisition module is connected to the control module, configured to acquire an operating temperature threshold corresponding to the heat generating device, and to perform the compression according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device The operating frequency of the machine is adjusted.

According to the control device of the compressor according to the embodiment of the present invention, during the operation of the compressor, the temperature acquisition module acquires the temperature of the heat generating device in the input circuit of the compressor in real time, and the control module acquires the operating temperature threshold corresponding to the heat generating device. The operating frequency of the compressor is adjusted according to the temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device. Therefore, the purpose of reducing the temperature of the heat generating device in the input circuit and reducing the input current is achieved by adjusting the operating frequency of the compressor.

According to an embodiment of the present invention, when the input circuit employs a passive power factor correction PFC circuit, the heat generating device includes one or more of a common mode inductor, a rectifier bridge, a PFC inductor, a diode, and an electrolytic capacitor; When the input circuit uses a Boost type PFC circuit, the heat generating device includes one or more of a common mode inductor, a rectifier bridge, a PFC inductor, a power switch tube, a diode, and an electrolytic capacitor.

According to an embodiment of the present invention, the control module adjusts an operating frequency of the compressor by using a rod control method according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device, wherein When the temperature of the heat generating device in the input circuit is greater than the operating temperature threshold, the control module gradually reduces the operating frequency of the compressor until the temperature of the heat generating device is less than the corresponding operating temperature. a threshold value; when the temperature of the heat generating device in the input circuit is less than a corresponding operating temperature threshold, the control module gradually increases an operating frequency of the compressor until the running frequency of the compressor reaches a target operation frequency.

According to another embodiment of the present invention, the control module adjusts an operating frequency of the compressor by a hysteresis control method according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device. Wherein, when the temperature of the heat generating device in the input circuit is greater than the working temperature threshold, the control module gradually reduces the operating frequency of the compressor until the temperature of the heat generating device is less than the corresponding work a temperature threshold; when the temperature of the heat generating device in the input circuit is less than a minimum value of a temperature dead zone corresponding to the heat generating device, the control module gradually increases the operating frequency of the compressor until the The operating frequency of the compressor reaches a target operating frequency, wherein a maximum value of the temperature dead zone is the operating temperature threshold; otherwise, the control module keeps the operating frequency of the compressor unchanged.

According to still another embodiment of the present invention, the control module adjusts the operating frequency of the compressor by using a proportional integral control manner according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device. The control module includes: a subtractor configured to calculate a difference between an operating temperature threshold of the heat generating device and a temperature of the heat generating device; a proportional integral adjuster for operating temperature thresholds of the heat generating device a difference between the temperatures of the heat generating devices is proportionally integrated to obtain a first value; a limiting processor that performs a limiting process on the first value to obtain a target operating frequency correction value of the compressor; And superimposing the target operating frequency correction value on a target operating frequency of the compressor to obtain an actual target operating frequency of the compressor.

Further, an embodiment of the present invention also proposes a home appliance including the above-described control device of the compressor.

The household appliance according to the embodiment of the present invention can achieve the purpose of reducing the temperature of the heat generating device in the input circuit and reducing the input current by adjusting the operating frequency of the compressor through the control device of the compressor described above.

In order to achieve the above object, an embodiment of the present invention further provides an apparatus, including: one or more processors; a storage; one or more programs stored in the memory, performing the compression of any one of claims 1-5 when executed by the one or more processors Machine control method.

The device of the embodiment of the present invention acquires the temperature of the heat generating device in the input circuit of the compressor in real time during the operation of the compressor, and obtains an operating temperature threshold corresponding to the heat generating device, and then according to the temperature of the heat generating device and the heat generating device The corresponding operating temperature threshold adjusts the operating frequency of the compressor. Therefore, the purpose of reducing the temperature of the heat generating device in the input circuit and reducing the input current is achieved by adjusting the operating frequency of the compressor.

In order to achieve the above object, embodiments of the present invention also provide a non-volatile computer storage medium storing one or more programs, when the one or more programs are executed by one device, The apparatus is caused to perform the control method of the compressor according to any one of claims 1 to 5.

The computer storage medium of the embodiment of the present invention acquires the temperature of the heat generating device in the input circuit of the compressor in real time during the operation of the compressor, and acquires an operating temperature threshold corresponding to the heat generating device, and then according to the temperature and heat of the heat generating device. The operating temperature threshold of the device adjusts the operating frequency of the compressor. Therefore, the purpose of reducing the temperature of the heat generating device in the input circuit and reducing the input current is achieved by adjusting the operating frequency of the compressor.

DRAWINGS

1 is a flow chart of a control method of a compressor according to an embodiment of the present invention;

2 is a topological diagram of an input circuit employing a passive PFC circuit in accordance with one embodiment of the present invention;

3 is a topological diagram of an input circuit using a Boost type PFC circuit in accordance with one embodiment of the present invention;

4 is a schematic structural diagram of a control module according to an embodiment of the present invention;

Figure 5 is a block schematic illustration of a control device for a compressor in accordance with one embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

A control method of a compressor, a control device for a compressor, and a home appliance having the same according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

1 is a flow chart of a control method of a compressor according to an embodiment of the present invention. As shown in FIG. 1, the control method of the compressor may include the following steps:

S1. Acquire a temperature of the heat generating device in the input circuit of the compressor, and acquire an operating temperature threshold corresponding to the heat generating device.

In an embodiment of the invention, when the input circuit uses a passive PFC circuit, the heat generating device includes a common mode inductor, and One or more of a bridge, a PFC inductor, a diode, and an electrolytic capacitor; when the input circuit uses a Boost type PFC circuit, the heat generating device includes a common mode inductor, a rectifier bridge, a PFC inductor, a power switch tube, a diode, and an electrolytic capacitor. One or more.

In particular, Figure 2 is an input circuit topology diagram employing a passive PFC circuit in accordance with one embodiment of the present invention. 3 is a topological diagram of an input circuit employing a Boost type PFC circuit in accordance with one embodiment of the present invention. In Figure 2, the input circuit can be composed of a common mode inductor, a rectifier bridge, a passive PFC circuit, and an electrolytic capacitor. The common mode inductor, rectifier bridge, PFC inductor, diode, and electrolytic capacitor are the main heating devices of the input circuit. In Figure 3, the input circuit can be composed of a common mode inductor, a rectifier bridge, a Boost type PFC circuit, and an electrolytic capacitor, wherein the common mode inductor, the rectifier bridge, the PFC inductor, the power switch tube, the diode, and the electrolytic capacitor are the main heats of the input circuit. Device. During the operation of the compressor, the temperature of the device can be collected in real time by a temperature sensor disposed on each of the heat generating devices.

S2, adjusting the operating frequency of the compressor according to the temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device.

Specifically, since the temperature that each heat generating device can actually withstand is different, the operating temperature threshold of the heat generating device can be set according to the specification of the heat generating device, and then, according to the detected temperature and the temperature of the heat generating device The operating temperature threshold corresponding to the heating device determines whether the operating frequency of the compressor needs to be adjusted. For example, when the temperature of the heating device reaches the corresponding operating temperature threshold, the operating frequency of the compressor can be reduced, thereby reducing the input current. The purpose of reducing the heating of the heating device in the input circuit is to ensure that the input circuit does not have over-temperature protection and over-current protection when the AC voltage is low, thereby effectively improving the safety and reliability of the system.

Specifically, according to an embodiment of the present invention, when the operating frequency of the compressor is adjusted by a rod control method according to the temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device, wherein there is heat in the input circuit When the temperature of the device is greater than the operating temperature threshold, the operating frequency of the compressor is gradually reduced until the temperature of the heating device is less than the corresponding operating temperature threshold; when the temperature of the heating device in the input circuit is less than the corresponding operating temperature threshold, step by step Increase the operating frequency of the compressor until the operating frequency of the compressor reaches the target operating frequency.

Specifically, taking FIG. 2 as an example, during the operation of the compressor, the temperature of the common mode inductor, the rectifier bridge, the PFC inductor, the diode, and the electrolytic capacitor are detected in real time by the temperature sensor, and the temperature of each of the heat generating devices is respectively determined to be greater than Corresponding operating temperature threshold, if the temperature of the heating device is greater than the corresponding operating temperature threshold, gradually reduce the operating frequency of the compressor until the temperature of all the heating devices is less than the corresponding operating temperature threshold; conversely, when the temperature of the heating device is When it is less than the corresponding working temperature threshold, the operating frequency of the compressor is gradually increased until the operating frequency of the compressor reaches the target operating frequency. Therefore, the purpose of reducing the heat generation of the heating device in the input circuit and reducing the input current is achieved by real-time adjustment of the operating frequency of the compressor.

According to another embodiment of the present invention, when the operating frequency of the compressor is adjusted by a hysteresis control method according to the temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device, wherein a heater is present in the input circuit When the temperature of the piece is greater than the working temperature threshold, the operating frequency of the compressor is gradually reduced until the temperature of the heating device is less than the corresponding operating temperature threshold; when the temperature of the heating device in the input circuit is less than the temperature dead zone corresponding to the heating device At the minimum value, the operating frequency of the compressor is gradually increased until the operating frequency of the compressor reaches the target operating frequency, wherein the maximum value of the temperature dead zone is the operating temperature threshold; otherwise, the operating frequency of the compressor is kept constant.

Specifically, when the operating frequency of the compressor is adjusted, a temperature dead zone can be set for each of the heat generating devices, wherein the maximum value of the temperature dead zone is the operating temperature threshold of the heat generating device. Taking Figure 2 as an example, during the operation of the compressor, the temperature of the common mode inductor, the rectifier bridge, the PFC inductor, the diode and the electrolytic capacitor are detected in real time by the temperature sensor, and the temperature of each heating device is respectively determined to be greater than the corresponding operating temperature. Threshold. If the temperature of the heating device is greater than the maximum value of the corresponding temperature dead zone, ie the operating temperature threshold, the operating frequency of the compressor is gradually reduced until the temperature of all the heating devices is less than the operating temperature threshold; if the temperature of the heating device is less than the temperature The minimum value of the dead zone gradually increases the operating frequency of the compressor until the operating frequency of the compressor reaches the target operating frequency; otherwise, the current operating frequency of the compressor is kept constant. Therefore, by real-time adjustment of the operating frequency of the compressor, the purpose of reducing the heat generation of the heating device in the input circuit and reducing the input current can be achieved. At the same time, by setting the temperature dead zone, the operating frequency of the compressor can be effectively reduced and raised. Frequent switching between.

According to still another embodiment of the present invention, when the operating frequency of the compressor is adjusted by a proportional integral control method according to the temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device, wherein the operating temperature of the heat generating device is calculated a difference between a threshold and a temperature of the heat generating device; proportionally integrating a difference between an operating temperature threshold of the heat generating device and a temperature of the heat generating device to obtain a first value; and limiting the first value to Obtain the target operating frequency correction value of the compressor; superimpose the target operating frequency correction value to the target operating frequency of the compressor to obtain the actual target operating frequency of the compressor.

It should be noted that when the first value is subjected to the limiting processing, the upper limit of the limiting link is zero, and the lower limit is a negative target operating frequency. That is to say, when the temperature of the heating device is less than or equal to the operating temperature threshold, the target operating frequency correction amount is zero, that is, the target operating frequency of the compressor is not adjusted; when the temperature of the heating device is greater than the operating temperature threshold, the target operating frequency is corrected. The amount is greater than zero, and the target operating frequency of the compressor is adjusted at this time.

Specifically, taking FIG. 2 as an example, during the operation of the compressor, the temperature of the common mode inductor, the rectifier bridge, the PFC inductor, the diode, and the electrolytic capacitor is detected in real time by the temperature sensor, and then, according to the detected temperature of the heat generating device. And the corresponding operating temperature threshold, the operating frequency of the compressor is adjusted by the proportional integral adjustment method shown in FIG.

For example, during the operation of the compressor, if the temperature of the heating device is less than the corresponding operating temperature threshold, the target operating frequency correction amount obtained according to each heating device is zero, and the target operating frequency of the compressor is not Correction; if the temperature of a heating device is greater than the corresponding operating temperature threshold, a negative target operating frequency correction value is obtained after the proportional integration link and the limiting processing step, and then the target operating frequency correction value is superimposed on the compressor Target operating frequency to obtain the actual target operating frequency of the compressor; if there are at least two heating devices If the temperature is greater than the corresponding operating temperature threshold, the actual target operating frequency of at least two compressors can be obtained after the proportional integral link and the limiting processing. At this time, the maximum actual target operating frequency can be selected as the final actual target operating frequency. It is also possible to select the minimum actual target operating frequency as the final actual target operating frequency, or you can select the average as the final actual target operating frequency. Therefore, by real-time adjustment of the operating frequency of the compressor, the purpose of reducing the heating of the heating device in the input circuit and reducing the input current is achieved. At the same time, the operating frequency of the compressor is adjusted by the proportional integral method, so that the adjustment is more rapid and accurate.

It should be noted that, for an air conditioning system that uses an AC fan to dissipate heat, although the rotation speed of the AC fan decreases as the amplitude of the AC voltage decreases, the heat dissipation capability of the air conditioning system is reduced, but the input circuit can be made by the above method. The heat generation of the medium-heating device is reduced, so that even if the rotation speed of the AC fan is lowered, the heating of the heat-generating device in the input circuit is not caused to be more serious.

In summary, according to the control method of the compressor according to the embodiment of the present invention, the temperature of the heat generating device in the input circuit of the compressor is acquired in real time during the operation of the compressor, and the operating temperature threshold corresponding to the heat generating device is obtained, and then The operating frequency of the compressor is adjusted in accordance with the temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device. Therefore, the purpose of reducing the temperature of the heat generating device in the input circuit and reducing the input current is achieved by adjusting the operating frequency of the compressor.

Figure 5 is a block schematic illustration of a control device for a compressor in accordance with one embodiment of the present invention. As shown in FIG. 5, the control device of the compressor may include a temperature acquisition module 10 and a control module 20.

The temperature obtaining module 10 is configured to acquire the temperature of the heat generating device in the input circuit of the compressor, and the control module 20 is connected to the temperature acquiring module 10, and the control module 20 is configured to acquire an operating temperature threshold corresponding to the heat generating device, and according to the heat generating device. The temperature and the operating temperature threshold corresponding to the heat generating device adjust the operating frequency of the compressor.

In an embodiment of the present invention, when the input circuit uses a passive PFC circuit, the heat generating device includes one or more of a common mode inductor, a rectifier bridge, a PFC inductor, a diode, and an electrolytic capacitor; when the input circuit adopts a Boost type PFC In the circuit, the heat generating device includes one or more of a common mode inductor, a rectifier bridge, a PFC inductor, a power switch tube, a diode, and an electrolytic capacitor.

In particular, Figure 2 is an input circuit topology diagram employing a passive PFC circuit in accordance with one embodiment of the present invention. 3 is a topological diagram of an input circuit employing a Boost type PFC circuit in accordance with one embodiment of the present invention. In Figure 2, the input circuit can be composed of a common mode inductor, a rectifier bridge, a passive PFC circuit, and an electrolytic capacitor. The common mode inductor, rectifier bridge, PFC inductor, diode, and electrolytic capacitor are the main heating devices of the input circuit. In Figure 3, the input circuit can be composed of a common mode inductor, a rectifier bridge, a Boost type PFC circuit, and an electrolytic capacitor, wherein the common mode inductor, the rectifier bridge, the PFC inductor, the power switch tube, the diode, and the electrolytic capacitor are the main heats of the input circuit. Device. During operation of the compressor M, the temperature acquisition module 10 can acquire the temperature of the device in real time through a temperature sensor disposed on each of the heat generating devices.

Since the temperature that each heat-generating device can withstand is different, it can be based on the specification of the heat-generating device. The operating temperature threshold of the heat generating device is set and stored in the control module 20 in advance. Then, the control module 20 determines whether the compressor M is needed according to the detected temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device. The operating frequency is adjusted. For example, when the temperature of the heating device reaches the corresponding operating temperature threshold, the operating frequency of the compressor M can be lowered, thereby reducing the input current, reducing the heat generation of the heating device in the input circuit, and ensuring the AC voltage. At lower times, the input circuit does not have over-temperature protection and over-current protection, which effectively improves the safety and reliability of the system.

Specifically, according to an embodiment of the present invention, the control module 20 adjusts the operating frequency of the compressor M by using a rod control method according to the temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device, wherein When the temperature of the heating device in the circuit is greater than the operating temperature threshold, the control module 20 gradually reduces the operating frequency of the compressor M until the temperature of the heating device is less than the corresponding operating temperature threshold; when the temperature of the heating device in the input circuit is less than the respective When the corresponding operating temperature threshold is reached, the control module 20 gradually increases the operating frequency of the compressor M until the operating frequency of the compressor M reaches the target operating frequency.

Specifically, taking FIG. 2 as an example, during the operation of the compressor M, the temperature acquisition module 10 detects the temperature of the common mode inductor, the rectifier bridge, the PFC inductor, the diode, and the electrolytic capacitor in real time through the temperature sensor, and the control module 20 determines respectively. Whether the temperature of each heating device is greater than a corresponding operating temperature threshold, if the temperature of the heating device is greater than the corresponding operating temperature threshold, the control module 20 gradually reduces the operating frequency of the compressor M until the temperature of all the heating devices is less than the corresponding operation. The temperature threshold; conversely, when the temperature of the heat generating device is less than the corresponding operating temperature threshold, the control module 20 gradually increases the operating frequency of the compressor M until the operating frequency of the compressor M reaches the target operating frequency. Therefore, the purpose of reducing the heat generation of the heating device in the input circuit and reducing the input current is achieved by real-time adjustment of the operating frequency of the compressor.

According to another embodiment of the present invention, the control module 20 adjusts the operating frequency of the compressor M by hysteresis control according to the temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device, wherein, when inputting the circuit When the temperature of the heating device is greater than the operating temperature threshold, the control module 20 gradually reduces the operating frequency of the compressor M until the temperature of the heating device is less than the corresponding operating temperature threshold; when the temperature of the heating device in the input circuit is less than the heating device When the minimum value of the corresponding temperature dead zone is reached, the control module 20 gradually increases the operating frequency of the compressor M until the operating frequency of the compressor M reaches the target operating frequency, wherein the maximum value of the temperature dead zone is the operating temperature threshold; otherwise The control module 20 keeps the operating frequency of the compressor M constant.

Specifically, when the operating frequency of the compressor M is adjusted, a temperature dead zone can be set for each of the heat generating devices, wherein the maximum value of the temperature dead zone is the operating temperature threshold of the heat generating device. Taking FIG. 2 as an example, during the operation of the compressor M, the temperature acquisition module 10 detects the temperature of the common mode inductor, the rectifier bridge, the PFC inductor, the diode, and the electrolytic capacitor in real time through the temperature sensor, and the control module 20 determines the respective heat generating devices. Whether the temperature is greater than the corresponding operating temperature threshold. If the temperature of the heat generating device is greater than the maximum value of the corresponding temperature dead zone, that is, the operating temperature threshold, the control module 20 Then gradually reduce the operating frequency of the compressor M until the temperature of all the heating devices is less than the operating temperature threshold; if the temperature of the heating device is less than the minimum value of the temperature dead zone, the control module 20 gradually increases the operating frequency of the compressor M, Until the operating frequency of the compressor M reaches the target operating frequency; otherwise, the control module 20 keeps the current operating frequency of the compressor M constant. Therefore, by real-time adjustment of the operating frequency of the compressor, the purpose of reducing the heat generation of the heating device in the input circuit and reducing the input current can be achieved. At the same time, by setting the temperature dead zone, the operating frequency of the compressor can be effectively reduced and raised. Frequent switching between.

According to still another embodiment of the present invention, as shown in FIG. 4, the control module 20 adjusts the operating frequency of the compressor M by using a proportional integral control method according to the temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device. The control module 20 includes a subtractor 21, a proportional integral regulator 22, a limiter processor 23, and an adder 24. Wherein, the subtractor 21 is configured to calculate a difference between an operating temperature threshold of the heat generating device and a temperature of the heat generating device; and the proportional integral regulator 22 is configured to perform a difference between an operating temperature threshold of the heat generating device and a temperature of the heat generating device The proportional integral adjustment obtains the first value; the limit processor 23 performs a limiting process on the first value to obtain a target operating frequency correction value of the compressor M; and the adder 24 is configured to superimpose the target operating frequency correction value on the compressor M The target operating frequency is obtained to obtain the actual target operating frequency of the compressor M.

It should be noted that the upper limit value of the limiter 23 is zero, and the lower limit value is a negative target operating frequency. That is, when the temperature of the heat generating device is less than or equal to the operating temperature threshold, the target operating frequency correction amount output by the limiter 23 is zero, that is, the target operating frequency of the compressor M is not adjusted; when the temperature of the heat generating device is greater than the operating temperature At the threshold value, the target operating frequency correction amount output by the limiter 23 is greater than zero, and the target operating frequency of the compressor M is adjusted at this time.

Specifically, taking FIG. 2 as an example, during the operation of the compressor M, the temperature acquisition module 20 detects the temperature of the common mode inductor, the rectifier bridge, the PFC inductor, the diode, and the electrolytic capacitor in real time through the temperature sensor, and then, the control module 20 The operating frequency of the compressor is adjusted by the proportional integral adjustment method shown in FIG. 4 according to the detected temperature of the heat generating device and the corresponding operating temperature threshold.

For example, during the operation of the compressor, if the temperature of the heating device is less than the corresponding operating temperature threshold, the target operating frequency correction amount obtained according to each heating device is zero, and the target operation of the compressor M is not performed at this time. The frequency is corrected; if the temperature of a heating device is greater than the corresponding operating temperature threshold, a negative target operating frequency correction value is obtained by the proportional-integral regulator 22 and the limiting processor 23, and then the target operating frequency correction value is obtained. Superimposed to the target operating frequency of the compressor M to obtain the actual target operating frequency of the compressor M; if there are at least two heat generating devices whose temperature is greater than the corresponding operating temperature threshold, pass through the proportional integral regulator 22 and the limiting processor 23 After that, the actual target operating frequency of at least two compressors can be obtained. At this time, the maximum actual target operating frequency can be selected as the final actual target operating frequency, or the minimum actual target operating frequency can be selected as the final actual target operating frequency. You can also choose the average as the final actual target operating frequency.Therefore, by real-time adjustment of the operating frequency of the compressor, the purpose of reducing the heat generation of the heating device in the input circuit and reducing the input current is achieved, and at the same time, The proportional integration method adjusts the operating frequency of the compressor, making the adjustment faster and more accurate.

According to the control device of the compressor of the embodiment of the present invention, during the operation of the compressor, the temperature acquisition module acquires the temperature of the heat generating device in the input circuit of the compressor in real time, and the control module acquires the operating temperature threshold corresponding to the heat generating device, and according to The temperature of the heat generating device and the operating temperature threshold corresponding to the heat generating device adjust the operating frequency of the compressor. Therefore, the purpose of reducing the temperature of the heat generating device in the input circuit and reducing the input current is achieved by adjusting the operating frequency of the compressor.

Further, an embodiment of the present invention also proposes a home appliance including the above-described control device of the compressor. The household appliance may be an air conditioner, a refrigerator, or the like.

It should be understood that portions of the invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, multiple steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques well known in the art: having logic gates for implementing logic functions on data signals. Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one; can be The mechanical connection may also be an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship of two elements unless explicitly defined otherwise. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A control method for a compressor, comprising the steps of:

Obtaining a temperature of a heat generating device in an input circuit of the compressor, and acquiring an operating temperature threshold corresponding to the heat generating device;

The operating frequency of the compressor is adjusted in accordance with a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device.
A control method of a compressor according to claim 1, wherein

When the input circuit uses a passive power factor correction PFC circuit, the heat generating device includes one or more of a common mode inductor, a rectifier bridge, a PFC inductor, a diode, and an electrolytic capacitor;

When the input circuit uses a Boost type PFC circuit, the heat generating device includes one or more of a common mode inductor, a rectifier bridge, a PFC inductor, a power switch tube, a diode, and an electrolytic capacitor.
The control method of a compressor according to claim 1 or 2, wherein the compressor is controlled by a rod control method according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device When the operating frequency is adjusted, among them,

When the temperature of the heat generating device in the input circuit is greater than the operating temperature threshold, gradually reducing the operating frequency of the compressor until the temperature of the heat generating device is less than a corresponding operating temperature threshold;

When the temperature of the heat generating device in the input circuit is less than the respective corresponding operating temperature thresholds, the operating frequency of the compressor is gradually increased until the operating frequency of the compressor reaches the target operating frequency.
The control method of a compressor according to claim 1 or 2, wherein the compressor is used in a hysteresis control manner according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device When the operating frequency is adjusted, among them,

When the temperature of the heat generating device in the input circuit is greater than the operating temperature threshold, gradually reducing the operating frequency of the compressor until the temperature of the heat generating device is less than a corresponding operating temperature threshold;

When the temperature of the heat generating device in the input circuit is less than a minimum value of a temperature dead zone corresponding to the heat generating device, the operating frequency of the compressor is gradually increased until the running frequency of the compressor reaches a target operating frequency, wherein a maximum value of the temperature dead zone is the operating temperature threshold;

Otherwise, the operating frequency of the compressor is kept constant.
The control method of a compressor according to claim 1 or 2, wherein a proportional integral control method is used for the compressor according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device When the operating frequency is adjusted, among them,

Calculating a difference between an operating temperature threshold of the heat generating device and a temperature of the heat generating device;

Performing proportional integral adjustment on a difference between an operating temperature threshold of the heat generating device and a temperature of the heat generating device to obtain a first value;

Performing a limiting process on the first value to obtain a target operating frequency correction value of the compressor;

The target operating frequency correction value is superimposed to a target operating frequency of the compressor to obtain an actual target operating frequency of the compressor.
A control device for a compressor, comprising:

a temperature acquisition module for obtaining a temperature of a heat generating device in an input circuit of the compressor;

a control module, the control module is connected to the temperature acquisition module, the control module is configured to acquire an operating temperature threshold corresponding to the heat generating device, and corresponding to the heat generating device according to a temperature of the heat generating device The operating temperature threshold adjusts the operating frequency of the compressor.
A control device for a compressor according to claim 6, wherein

When the input circuit uses a passive power factor correction PFC circuit, the heat generating device includes one or more of a common mode inductor, a rectifier bridge, a PFC inductor, a diode, and an electrolytic capacitor;

When the input circuit uses a Boost type PFC circuit, the heat generating device includes one or more of a common mode inductor, a rectifier bridge, a PFC inductor, a power switch tube, a diode, and an electrolytic capacitor.
The control device for a compressor according to claim 6 or 7, wherein said control module adopts a rod control method according to a temperature of said heat generating device and an operating temperature threshold corresponding to said heat generating device When the operating frequency of the compressor is adjusted, among them,

When the temperature of the heat generating device in the input circuit is greater than the operating temperature threshold, the control module gradually reduces the operating frequency of the compressor until the temperature of the heat generating device is less than a corresponding operating temperature threshold. ;

When the temperature of the heat generating device in the input circuit is less than the respective corresponding operating temperature thresholds, the control module gradually increases the operating frequency of the compressor until the operating frequency of the compressor reaches the target operating frequency.
The control device for a compressor according to claim 6 or 7, wherein the control module uses a hysteresis control method according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device. When the operating frequency of the compressor is adjusted, among them,

When the temperature of the heat generating device in the input circuit is greater than the operating temperature threshold, the control module gradually reduces the operating frequency of the compressor until the temperature of the heat generating device is less than a corresponding operating temperature threshold. ;

When the temperature of the heat generating device in the input circuit is less than a minimum value of a temperature dead zone corresponding to the heat generating device, the control module gradually raises an operating frequency of the compressor until the compressor The operating frequency reaches the target operating frequency, wherein the maximum value of the temperature dead zone is the operating temperature threshold;

Otherwise, the control module maintains the operating frequency of the compressor unchanged.
The control device for a compressor according to claim 6 or 7, wherein the control module uses a proportional integral control method according to a temperature of the heat generating device and an operating temperature threshold corresponding to the heat generating device. When the operating frequency of the compressor is adjusted, the control module includes:

a subtracter for calculating a difference between an operating temperature threshold of the heat generating device and a temperature of the heat generating device;

a proportional integral regulator, configured to perform proportional integral adjustment on a difference between an operating temperature threshold of the heat generating device and a temperature of the heat generating device to obtain a first value;

a limiting processor, performing a limiting process on the first value to obtain a target operating frequency correction value of the compressor;

And an adder for superimposing the target operating frequency correction value on a target operating frequency of the compressor to obtain an actual target operating frequency of the compressor.
A household appliance, comprising the control device of the compressor according to any one of claims 6-10.
An apparatus, comprising:

One or more processors;

Memory

One or more programs, the one or more programs being stored in the memory, when executed by the one or more processors, performing control of the compressor of any of claims 1-5 method.
A non-volatile computer storage medium, characterized in that the computer storage medium stores one or more programs, when the one or more programs are executed by a device, causing the device to perform as claimed in claim 1. A method of controlling a compressor according to any one of the preceding claims.