WO2021249047A1

WO2021249047A1 - Control method, control device, air conditioning system and computer-readable storage medium

Info

Publication number: WO2021249047A1
Application number: PCT/CN2021/089676
Authority: WO
Inventors: 尚亚浩; 甄锦鹏
Original assignee: 广东美的制冷设备有限公司
Priority date: 2020-06-08
Filing date: 2021-04-25
Publication date: 2021-12-16
Also published as: EP4137751A4; CN111692705B; CN111692705A; EP4137751A1

Abstract

A control method, a control device (200), an air conditioning system (100/300) and a computer-readable storage medium, the control method comprising: (S110) when a defrosting signal is obtained, detecting the on/off state of a heating device (13); (S130) when the heating device (13) is in the on state, controlling a first valve (17) to open to enable a pipeline between the heating device (13) and an external heat exchanger (15) to communicate, and so that the heating device (13) participates in a defrosting operation; (S150) when the heating device (13) is in the off state, controlling the first valve (17) to close, so that the pipeline between the heating device (13) and the external heat exchanger (15) is disconnected, and the heating device (13) does not participate in the defrosting operation; and (S170) when the heating device (13) participates in the defrosting operation and the temperature of the heating device (13) meets a preset condition, controlling the first valve (17) to close, or ending the defrosting operation.

Description

Control method, control device, air conditioning system and computer readable storage medium

Priority information

This application requests the priority and rights of the patent application with the patent application number 202010512642.5 filed with the State Intellectual Property Office of China on June 18, 2020, and the full text is incorporated herein by reference.

Technical field

This application relates to the field of air conditioning technology, and in particular to a control method, a control device, an air conditioning system, and a computer-readable storage medium.

Background technique

In the related art, the air-conditioning equipment is equipped with a hydraulic device for heating. When the air-conditioning equipment is defrosted, the hydraulic device is often in a low temperature environment due to participating in the defrosting, which easily causes freezing of the pipes in the hydraulic device and affects normal use.

Summary of the invention

The embodiments of the present application provide a control method, a control device, an air conditioning system, and a computer-readable storage medium.

An embodiment of the application provides a control method for an air-conditioning system. The air-conditioning system includes an outdoor unit and a heating device. The outdoor unit includes an outdoor unit heat exchanger and a first valve. The first valve pipe is connected to the outdoor heat exchanger, and the control method includes:

In the case of obtaining a defrost signal, detecting the opening and closing state of the heating device;

When the heating device is in the open state, the first valve is controlled to open so that the pipe between the heating device and the heat exchanger of the outdoor machine is connected, so that the heating device participates in Defrosting operation;

When the heating device is in the closed state, the first valve is controlled to be closed to disconnect the pipe between the heating device and the heat exchanger of the outdoor machine, thereby making the heating device not Participate in defrosting operations;

When the heating device participates in the defrosting operation and the temperature of the heating device meets a preset condition, the first valve is controlled to close, or the defrosting operation is ended.

In the above control method, the heating device participates in defrosting when the heating device is in the on state, and does not participate in the defrosting when the heating device is in the off state. When the heating device participates in the defrosting operation and the temperature of the heating device meets the preset conditions , The heating device does not participate in defrosting, so that the heating device can be fully utilized for defrosting and will not be frozen, so that the air conditioning system can operate normally.

In some embodiments, the air conditioning system includes an indoor unit, the outdoor unit includes a second valve, and the second valve connects the indoor unit and the outdoor unit heat exchanger, and the control method includes:

In the case of acquiring the defrost signal, detecting the current working mode of the indoor unit;

When the heating device is in a closed state or there is a mode conflict between the heating device and the indoor unit, the first valve is controlled to close so that the heating device and the outdoor unit heat exchanger are The pipe between the two is disconnected, so that the heating device does not participate in the defrosting operation, and the second valve is controlled to open so that the corresponding pipe between the indoor unit and the outdoor unit heat exchanger is connected, and then Enabling the indoor unit to participate in the defrosting operation;

When the heating device is in an on state and there is no mode conflict between the heating device and the indoor unit, control the first valve to open so that the heating device and the outdoor unit heat exchanger The pipes between the two are connected, so that the heating device participates in the defrosting operation;

When the heating device participates in the defrosting operation and the temperature of the heating device meets a preset condition, the first valve is controlled to close, and the second valve is controlled to open so that the corresponding indoor unit The pipeline between the heat exchanger of the outdoor unit and the heat exchanger is conducted, so that the indoor unit participates in the defrosting operation.

In some embodiments, the control method includes:

When the heating device is in the on state and there is no mode conflict between the heating device and the indoor unit, control the second valve to open so that the corresponding indoor unit and the outdoor unit exchange heat The pipes between the devices are connected, so that the indoor unit participates in the defrosting operation.

In some embodiments, the temperature of the heating device includes an inlet water temperature and an outlet water temperature, and the preset condition includes a defrost temperature threshold,

The control method includes:

In the case that the smaller of the inlet water temperature and the outlet water temperature is not greater than the defrost temperature threshold, it is determined that the temperature of the heating device meets the preset condition.

In some embodiments, the value range of the defrost temperature threshold is (0°C, 10°C).

An embodiment of the application provides a control device for an air conditioning system. The air conditioning system includes an outdoor unit and a heating device. The outdoor unit includes an outdoor unit heat exchanger and a first valve. The first valve pipe is connected to the outdoor heat exchanger, and the control device includes:

The acquisition module is used to acquire the defrost signal;

The detection module is used to detect the opening and closing state of the heating device;

The control module is used to control the opening of the first valve when the heating device is in the open state so that the pipeline between the heating device and the heat exchanger of the outdoor machine is connected, thereby enabling all The heating device participates in the defrosting operation; and

It is used to control the closing of the first valve to disconnect the pipe between the heating device and the heat exchanger of the outdoor machine when the heating device is in the closed state, thereby causing the heating device to be closed. The device does not participate in the defrosting operation; and

It is used to control the first valve to close or end the defrosting operation when the heating device participates in the defrosting operation and the temperature of the heating device meets a preset condition.

In the above-mentioned control device, the heating device participates in defrosting when the heating device is in the open state, and does not participate in the defrosting when the heating device is in the closed state. When the heating device participates in the defrosting operation and the temperature of the heating device meets the preset conditions , The heating device does not participate in defrosting, so that the heating device can be fully utilized for defrosting and will not be frozen, so that the air conditioning system can operate normally.

In some embodiments, the air conditioning system includes an indoor unit, the outdoor unit includes a second valve, the second valve connects the indoor unit and the outdoor unit heat exchanger, and the detection module is used to When the defrost signal is obtained, the current working mode of the indoor unit is detected,

The control module is used to control the first valve to close so that the heating device and the indoor unit are in a closed state or there is a mode conflict between the heating device and the indoor unit. The pipeline between the heat exchangers of the outdoor unit is disconnected, so that the heating device does not participate in the defrosting operation, and the second valve is controlled to open so that the corresponding indoor unit and the heat exchanger of the outdoor unit The pipeline is turned on, so that the indoor unit participates in the defrosting operation; and

Used to control the opening of the first valve to exchange the heating device and the outdoor unit when the heating device is in an on state and there is no mode conflict between the heating device and the indoor unit The pipes between the heaters are connected, so that the heating device participates in the defrosting operation; and

It is used to control the first valve to close and control the second valve to open so that the corresponding The pipeline between the indoor unit and the heat exchanger of the outdoor unit is conducted, so that the indoor unit participates in the defrosting operation.

In some embodiments, the control module is used to control the second valve to open when the heating device is in an on state and there is no mode conflict between the heating device and the indoor unit Corresponding pipes between the indoor unit and the heat exchanger of the outdoor unit are connected, so that the indoor unit participates in the defrosting operation.

The control module is configured to determine that the temperature of the heating device meets the preset condition when the smaller temperature of the inlet water temperature and the outlet water temperature is not greater than the defrost temperature threshold.

An air conditioning system provided by an embodiment of the present application includes the control device of any one of the foregoing embodiments.

In the above-mentioned air conditioning system, the heating device participates in defrosting when the heating device is in the on state, and does not participate in the defrosting when the heating device is in the off state. When the heating device participates in the defrosting operation and the temperature of the heating device meets the preset conditions , The heating device does not participate in defrosting, so that the heating device can be fully utilized for defrosting and will not be frozen, so that the air conditioning system can operate normally.

An air-conditioning system provided by an embodiment of the present application includes a memory, a processor, and computer-executable instructions stored in the memory and running on the processor, and the processor is configured to execute the Computer-executable instructions are used to implement the steps of the control method described in any of the foregoing embodiments.

The embodiment of the present application provides a non-volatile computer-readable storage medium containing computer-executable instructions. When the computer-executable instructions are executed by one or more processors, the processor is caused to execute any of the foregoing. Steps of the control method described in one embodiment.

The additional aspects and advantages of the present application will be partially given in the following description, and some will become obvious from the following description, or be understood through the practice of the present application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1 is a flowchart of a control method according to an embodiment of the present application;

Fig. 2 is a partial structural diagram of an air conditioning system according to an embodiment of the present application;

Fig. 3 is a block diagram of a control device according to an embodiment of the present application;

4 is a schematic diagram of another part of the structure of the air conditioning system according to the embodiment of the present application;

FIG. 5 is a schematic diagram of another part of the structure of the air conditioning system according to the embodiment of the present application;

FIG. 6 is another flowchart of the control method of the embodiment of the present application;

FIG. 7 is another flowchart of the control method of the embodiment of the present application;

FIG. 8 is still another flowchart of the control method of the embodiment of the present application;

Fig. 9 is a block diagram of an air conditioning system according to an embodiment of the present application.

Symbol description of main components:

Air conditioning system 100, control device 200, air conditioning system 300;

Outdoor unit 11, heating device 13, water inlet 131, water outlet 133, outdoor unit heat exchanger 15, first valve 17;

Compressor 21, four-way valve 23, first heat exchanger 25, indoor unit 27, second valve 29;

Electric heating element 31, heating coil 33, water tank 35;

The acquisition module 110, the detection module 130, and the control module 150;

The memory 210 and the processor 230.

detailed description

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The following embodiments described with reference to the drawings are exemplary, and are only used to explain the present application, and cannot be understood as a limitation to the present application.

In the description of this application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more than two, unless otherwise specifically defined.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connect, or connect in one piece. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, and it can be a communication between two elements or an interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

The disclosure in this application provides many different implementations or examples for realizing different structures of this application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and are not intended to limit the application. In addition, the present application may repeat reference numerals and/or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and/or settings discussed. In addition, this application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and/or the use of other materials.

Please refer to FIG. 1 and FIG. 2, a control method provided by an embodiment of the present application is used in an air conditioning system 100. The air conditioning system 100 includes an outdoor unit 11 and a heating device 13. The outdoor unit 11 includes an outdoor unit heat exchanger 15 and a first valve 17. The heating device 13 is connected to the outdoor heat exchanger 15 through the first valve 17 pipe.

Control methods include:

Step S110: when the defrosting signal is obtained, the open and close state of the heating device 13 is detected;

Step S130: When the heating device 13 is in an open state, the first valve 17 is controlled to open so that the pipe between the heating device 13 and the outdoor heat exchanger 15 is connected, so that the heating device 13 participates in defrosting operate;

Step S150: When the heating device 13 is in the closed state, control the first valve 17 to close to disconnect the pipe between the heating device 13 and the outdoor heat exchanger 15, so that the heating device 13 does not participate in the process Frost operation

Step S170: When the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset condition, control the first valve 17 to close, or end the defrosting operation.

The control method of the embodiment of the present application can be implemented by the control device 200 of the embodiment of the present application. Specifically, referring to FIG. 3, the control device 200 includes an acquisition module 110, a detection module 130 and a control module 150. The obtaining module 110 is used to obtain a defrosting signal. The detection module 130 is used to detect the opening and closing state of the heating device 13. The control module 150 is used to control the opening of the first valve 17 when the heating device 13 is in the open state so that the pipe between the heating device 13 and the outdoor heat exchanger 15 is connected, so that the heating device 13 can participate Defrosting operation; and used to control the first valve 17 to close when the heating device 13 is in the closed state to disconnect the pipe between the heating device 13 and the outdoor heat exchanger 15, thereby making the heating device 13 does not participate in the defrosting operation; and is used to control the first valve 17 to close or end the defrosting operation when the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets a preset condition.

In the above-mentioned control method and control device 200, the heating device 13 participates in defrosting when it is in the open state, and does not participate in the defrosting when it is in the closed state. The heating device 13 participates in the defrosting operation and the temperature of the heating device 13 When the preset conditions are met, the heating device 13 does not participate in defrosting, so that the heating device 13 can be fully utilized for defrosting without being frozen, so that the air conditioning system 100 can operate normally.

Specifically, in the air conditioning system 100 of the embodiment shown in FIG. 2, the outdoor unit 11 includes a compressor 21 and a four-way valve 23. The heating device 13 includes a first heat exchanger 25. Among them, the compressor 21 is the power of the air-conditioning system 100. In the air-conditioning system 100, the purpose of the compressor 21 is to compress a low-temperature refrigerant into a high-temperature refrigerant, and finally the refrigerant will exchange heat with other media in the outdoor heat exchanger 15. The compressor 21 may be a positive displacement compressor, a speed compressor, or the like. The four-way valve 23 switches different channels so that the high-temperature refrigerant compressed by the compressor 21 flows through different pipes, so that the air-conditioning system 100 can switch between the cooling function and the heating function. In the illustrated embodiment, the four-way valve 23 connects the D port and the E port, and connects the C port and the S port, so as to realize the heating function of the air conditioning system 100.

In addition, the first heat exchanger 25 is used to exchange the high-temperature refrigerant in the heating device 13 so as to realize the heating function of the heating device 13. The first heat exchanger 25 includes, but is not limited to, a floating head heat exchanger, a fixed tube sheet heat exchanger, a U-shaped tube sheet heat exchanger, a plate heat exchanger, and the like. In one embodiment, the first heat exchanger 25 is a plate heat exchanger.

2 and 3, in other embodiments, a temperature sensing element (not shown) may be provided on the outdoor heat exchanger 15, and the acquisition module 110 may obtain the temperature of the outdoor heat exchanger 15 through the temperature sensing element . The temperature of the outdoor heat exchanger 15 may be the temperature inside the outdoor heat exchanger 15 or the ambient temperature around the outdoor heat exchanger 15.

In one embodiment, the temperature sensing element may be an environmental temperature sensing bag for detecting the ambient temperature around the outdoor heat exchanger 15. When the ambient temperature around the outdoor heat exchanger 15 is less than or equal to the preset temperature, the environment The temperature sensing bulb will give corresponding feedback, so that the obtaining module 110 obtains the defrost signal. In other embodiments, the temperature sensing element may be a temperature sensor or an infrared sensor.

In the embodiment shown in FIG. 3, the defrost signal is sent to the detection module 130, and the detection module 130 detects the opening and closing state of the heating device 13 according to the defrost signal. It can be understood that in other embodiments, the defrost signal may be sent to the control module 150 so that the control module 150 controls the detection module 130 to detect the opening and closing state of the heating device 13.

In addition, the defrost signal can be sent to a terminal that wirelessly communicates with the air-conditioning system 100, and the terminal includes but is not limited to a mobile phone, a tablet computer, a personal computer, a wearable device, other air-conditioning system 100, and the like. Wireless communication can be realized through Bluetooth, WIFI, infrared, mobile network communication (such as 4G, 5G, etc.). In other embodiments, the defrost signal may also be generated by the remote controller of the air conditioning system 100 or the aforementioned terminal, and transmitted to the control device 200.

3, when the control device 200 receives the defrost signal, the detection module 130 will detect the opening and closing status of the heating device 13, and send the opening and closing status information of the heating device 13 to the control The module 150 enables the control module 150 to perform corresponding operations.

More specifically, when the heating device 13 is in an open state, the control module 150 controls the first valve 17 to open, so that the pipe between the heating device 13 and the outdoor heat exchanger 15 is conducted. In this case, please refer to Figure 2. The high-temperature refrigerant generated in the compressor 21 will pass through the D port, the E port and enter the first heat exchanger 25 in the heating device 13, and finally flow to the outside machine to exchange heat. The device 15 realizes that the heating device 13 participates in the defrosting operation of the external heat exchanger 15.

When the heating device 13 is in the closed state, the control module 150 controls the first valve 17 to close, so that the pipeline between the heating device 13 and the outdoor heat exchanger 15 is disconnected. In this case, it can be avoided that the internal pipes of the heating device 13 are frozen when the heating device 13 participates in the defrosting operation, which affects the subsequent normal operation of the heating device 13.

After the heating device 13 participates in the defrosting operation, if the temperature of the heating device 13 meets the preset conditions, it is confirmed that the heating device 13 is no longer suitable for participating in the defrosting operation, so that the heating device 13 is withdrawn from the external machine exchange. The defrosting operation of the heater 15 prevents the internal pipes of the heating device 13 from freezing. The function of the preset condition is to prevent the heating device 13 from being damaged due to low temperature. The preset conditions can be understood as anti-low temperature conditions or anti-freezing conditions.

The temperature of the heating device 13 may be the temperature of any pipe in the heating device 13 or the temperature of other elements in the heating device 13. In one embodiment, the preset condition includes a defrosting temperature threshold, and the heating device 13 is provided with a temperature sensing element. When the temperature sensing element senses that the temperature of the heating device 13 is less than or equal to the defrosting temperature threshold, the control module 150 can control the first valve 17 to close, or control the outdoor unit 11 to stop defrosting to end the defrosting operation, thereby avoiding the heating device The temperature of 13 is further reduced. The temperature sensing element includes, but is not limited to, a temperature sensing bag, a temperature sensor, an infrared sensor, etc. In other embodiments, the preset condition may also be detecting the variation range of the temperature of the heating device 13 within a preset period of time, which will not be detailed here.

It can be understood that when the heating device 13 is in an on state, the heating device 13 will perform heating and have a higher temperature. In this case, the pipes in the heating device 13 are not easily frozen, so that it is convenient for the heating device 13 to participate in the defrosting operation. When the heating device 13 is in the closed state, the heating device 13 has a lower temperature. In this case, let the heating device 13 not participate in the defrosting operation, so that the pipes in the heating device 13 are not easily frozen to protect the heating device 13 from being affected.

In addition, the first valve 17 includes, but is not limited to, valves with different power sources such as solenoid valves, hydraulic valves, pneumatic valves, and back pressure valves, as well as gate valves, globe valves, plug valves, ball valves, butterfly valves, diaphragm valves, check valves, etc. Throttle valves, pressure reducing valves and other valves with different opening and closing methods. In one embodiment, the first valve 17 is an electronic expansion valve.

In addition, in other embodiments, the first valve 17 has an opening degree. By adjusting the opening degree of the first valve 17, the flow speed or flow rate of the high-temperature refrigerant in the heating device 13 can be controlled, which improves the control accuracy. In one embodiment, the maximum opening of the first valve 17 is 480.

In addition, the heating device 13 can be used for heating and generating domestic hot water. Please refer to FIG. 2, FIG. 4 and FIG. 5, the heating device 13 includes an electric heating element 31. Specifically, the heating device 13 can realize the heating function by delivering high-temperature refrigerant to the first heat exchanger 25 by the compressor 21, and can also realize the production of domestic hot water by delivering the high-temperature refrigerant and heating by the electric heating element 31. . In the embodiment shown in FIG. 5, the air-conditioning system 100 includes a heating coil 33. The heating coil 33 can be installed indoors, and the heating device 13 can generate heating by heating the heating coil 33. The air-conditioning system 100 further includes a water tank 35, and the heating device 13 can deliver domestic hot water to the water tank 35, so as to meet the user's demand for heating hot water through the heating device 13. Specifically, in the embodiment shown in FIG. 2, the heating device 13 includes a water inlet 131 and a water outlet 133. The water inlet 131 is used for inputting cold water, and the water outlet 133 is used for outputting hot water. In an example, the electric heating element 31 is an electric heating tank.

Since the heating device 13 is in a high temperature environment for a long time, if the pipes in the heating device 13 freeze when participating in the defrosting operation, in this case, the pipes in the heating device 13 may expand due to long-term thermal expansion. Deformation due to cold shrinkage, or even breakage, affects the normal use of the heating device 13 and endangers the life and safety of users.

It should be pointed out that, in some embodiments, when the heating device 13 participates in the defrosting operation, referring to FIG. 3, the control module 150 can send a signal to the heating device 13 so that the heating device 13 sends a signal to participate in the defrosting operation. Tips. Specifically, in one embodiment, the air conditioning system 100 includes a reminder (not shown in the figure). Reminders include, but are not limited to, buzzers, LED lights, display screens, speakers, etc. The heating device 13 can notify the user through at least one of alarm sounds, lights with specific changing patterns, text on the display screen, and voice. A prompt message indicating that the heating device 13 participates in defrosting is issued.

Please refer to FIGS. 4 and 5. In some embodiments, the air conditioning system 100 includes an indoor unit 27. The outdoor unit 11 includes a second valve 29 that connects the indoor unit 27 and the outdoor unit heat exchanger 15. Please refer to Figure 6, the control methods include:

Step S210: When the defrost signal is acquired, the current working mode of the indoor unit 27 is detected;

Step S230: When the heating device 13 is in the closed state or there is a mode conflict between the heating device 13 and the indoor unit 27, control the first valve 17 to close to make the pipe between the heating device 13 and the outdoor unit heat exchanger 15 Disconnect, so that the heating device 13 does not participate in the defrosting operation, and the second valve 29 is controlled to open so that the corresponding pipe between the indoor unit 27 and the outdoor unit heat exchanger 15 is connected, so that the indoor unit 27 participates in the defrosting operation. operate;

Step S250: When the heating device 13 is in the on state and there is no mode conflict between the heating device 13 and the indoor unit 27, control the first valve 17 to open so that the heating device 13 and the outdoor unit heat exchanger 15 The pipeline is turned on, so that the heating device 13 participates in the defrosting operation;

Step S270: When the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset condition, the first valve 17 is controlled to close, and the second valve 29 is controlled to open so that the corresponding indoor unit 27 and the external The pipes between the machine heat exchangers 15 are connected, so that the indoor machine 27 participates in the defrosting operation.

The control method of the embodiment of the present application can be implemented by the control device 200 of the embodiment of the present application. Specifically, referring to FIG. 3, the detection module 130 is configured to detect the current working mode of the indoor unit 27 when the defrost signal is acquired. The control module 150 is used to control the first valve 17 to close so that the heating device 13 and the outdoor unit heat exchanger 15 The pipeline of the heating device 13 is disconnected, so that the heating device 13 does not participate in the defrosting operation, and the second valve 29 is controlled to open to make the pipeline between the corresponding indoor unit 27 and the outdoor unit heat exchanger 15 conduct, so that the indoor unit 27 participates Defrosting operation; and used to control the opening of the first valve 17 to enable the heating device 13 and the outdoor unit heat exchanger when the heating device 13 is in an open state and there is no mode conflict between the heating device 13 and the indoor unit 27 The pipeline between 15 is turned on, so that the heating device 13 participates in the defrosting operation; and is used to control the first valve when the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets a preset condition 17 is closed, and the second valve 29 is controlled to open so that the corresponding pipe between the indoor unit 27 and the outdoor unit heat exchanger 15 is connected, so that the indoor unit 27 participates in the defrosting operation. In this way, the heating device 13 and the indoor unit 27 can cooperate with each other to participate in the defrosting operation.

Specifically, referring to FIGS. 4 and 5, in the illustrated embodiment, the air conditioning system 100 has two indoor units 27 and two second valves 29. Each indoor unit 27 communicates with the compressor 21 and the outdoor unit heat exchanger 15 to form a corresponding and mutually independent pipeline circuit. A second valve 29 is provided on each pipeline circuit, and the second valve 29 is used to conduct and disconnect the pipeline circuit. It can be understood that by changing the communication interface of the four-way valve 23, the indoor unit 27 can be switched between various modes. In other embodiments, the number of indoor units 27 can also be other numbers, such as one, or more than two (such as three or more), which can be selected according to specific conditions. The specific principles are the same as those of the above-mentioned embodiments. The principle is similar, so I won't expand it in detail here.

With reference to FIG. 3, when the acquisition module 110 acquires the defrost signal, the control module 150 can detect the working mode of the indoor unit 27 through the detection module 130. Specifically, the detection module 130 may receive the working mode information of the indoor unit 27 through wired or wireless communication. The control module 150 determines the current working mode of the indoor unit 27 according to the corresponding working mode information of the indoor unit 27. The working mode of the indoor unit 27 may include a cooling mode, a heating mode, a dehumidification mode, a fresh air mode (or an air supply mode), and the like.

In the embodiment shown in FIGS. 4 and 5, when the heating device 13 is in the off state, or there is a mode conflict between the heating device 13 and the indoor unit 27, the control module 150 can determine that the heating device 13 is not With the conditions for participating in the defrosting operation (that is, the heating device 13 cannot continue to raise temperature), the first valve 17 is controlled to close and the second valve 29 is controlled to open, so that the heating device 13 does not participate in the defrosting operation and the indoor unit 27 participates in the defrosting operate. In this way, in the case of avoiding freezing of the heating device 13, the defrosting operation can be realized by the indoor unit 27. The participation of the indoor unit 27 in the defrosting operation means that the control module 150 controls the second valve 29 to open to communicate with the pipeline circuit where the corresponding indoor unit 27 is located, so that the high-temperature refrigerant passes through the indoor unit 27 to the outdoor unit heat exchanger 15.

When the heating device 13 is in the on state and there is no mode conflict between the heating device 13 and the indoor unit 27, the control module 150 can determine that the heating device 13 has the conditions to participate in the defrosting operation (that is, the heating device 13 is heated due to heating. It can be in a higher temperature state), so that the first valve 17 is controlled to open, so that the heating device 13 participates in the defrosting operation.

When the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset conditions, it is to confirm that the interior of the heating device 13 has a lower temperature. In this case, please refer to Figure 3, The control module 150 closes the first valve 17 and opens the second valve 29, so that the heating device 13 exits the defrosting operation of the external heat exchanger 15, and the outdoor unit 11 participates in the defrosting operation, avoiding the internal pipes of the heating device 13 In the case of freezing, it is also possible to continue defrosting the external machine heat exchanger 15.

In addition, the air conditioning system 100 may detect the current operating mode of the heating device 13 and the indoor unit 27 to perform mode processing. Specifically, when the control module 150 determines that the indoor unit 27 is on and the mode of the heating device 13 and the mode of the indoor unit 27 are in conflict, it can be confirmed that there is a mode conflict between the heating device 13 and the outdoor unit 11 . In the case of a mode conflict, the heating device 13 will be in a standby state or will not operate or shut down, so that the heating device 13 cannot be turned on. Mode conflicts can be determined according to specific conditions. In one embodiment, when the indoor unit 27 is in the on state and the heating device 13 is in the off state, turning on the heating device 13 will cause the heating device 13 to have a mode conflict and be in a standby state. For example, when the indoor unit 27 is operating in the cooling mode, the heating device 13 is turned on. At this time, the heating device 13 is heating while the indoor unit 27 is cooling, so there is a mode conflict.

It can be understood that when there is no conflict between the mode of the heating device 13 and the mode of the indoor unit 27, it can be confirmed that there is no conflict between the modes of the heating device 13 and the outdoor unit 11.

In addition, the second valve 29 includes but is not limited to valves with different power sources such as solenoid valves, hydraulic valves, pneumatic valves, and back pressure valves, as well as gate valves, globe valves, plug valves, ball valves, butterfly valves, diaphragm valves, check valves, etc. Throttle valves, pressure reducing valves and other valves with different opening and closing methods. In one example, the second valve 29 is an electronic expansion valve.

In addition, in other embodiments, the second valve 29 has an opening degree. By adjusting the opening degree of the second valve 29, the flow speed or flow rate of the high-temperature refrigerant in the indoor unit 27 can be controlled, and the control accuracy is improved. In one embodiment, the maximum opening of the second valve 29 is 480.

It should be pointed out that, in some embodiments, when the indoor unit 27 participates in the defrosting operation, the control module 150 can send a signal to the indoor unit 27 so that the indoor unit 27 sends out a prompt to participate in the defrosting. Specifically, the indoor unit 27 has a reminder (not shown in the figure). Reminders include but are not limited to buzzers, LED lights, display screens, speakers, etc. The indoor unit 27 can send out to the user through at least one of alarm prompt sounds, lights with specific changing patterns, text on the display screen, and voice. Tips for participating in defrosting.

In other embodiments, the air conditioning system 100 may omit the indoor unit 27. Specifically, in such an embodiment, in the heating device 13 shown in FIG. 2, the water inlet 131 is connected to the F port in FIG. 5, and the water outlet 133 is connected to the E port in FIG. 5. In addition, the water inlet 131 may also be connected with a water supply pipe to supply water to the heating device 13.

Please refer to FIG. 4, FIG. 5 and FIG. 7. In some embodiments, the control method includes:

Step S310: When the heating device 13 is in the on state and there is no mode conflict between the heating device 13 and the indoor unit 27, control the second valve 29 to open so that the corresponding indoor unit 27 and the outdoor unit heat exchanger 15 The pipeline is turned on, so that the indoor unit 27 participates in the defrosting operation.

The control method of the embodiment of the present application can be implemented by the control device 200 of the embodiment of the present application. Specifically, please refer to FIG. 3, the control module 150 is used to control the second valve 29 to open to enable the corresponding indoor unit when the heating device 13 is in the on state and there is no mode conflict between the heating device 13 and the indoor unit 27 The pipeline between 27 and the heat exchanger 15 of the outdoor unit is connected, so that the indoor unit 27 participates in the defrosting operation. In this way, the speed of the defrosting operation of the air conditioning system 100 can be accelerated.

Specifically, in the embodiment shown in FIGS. 4 and 5, when the control module 150 confirms that there is no mode conflict between the heating device 13 and the indoor unit 27, it can control the first valve 17 to open and the second valve 29 to open, so that The defrosting operation of the heating device 13 and the indoor unit 27 can accelerate the defrosting speed of the external unit heat exchanger 15.

Please refer to FIG. 8. In some embodiments, the temperature of the heating device 13 includes an inlet water temperature and an outlet water temperature. The preset conditions include a defrost temperature threshold. Control methods include:

Step S510: In the case that the smaller of the inlet water temperature and the outlet water temperature is not greater than the defrosting temperature threshold, it is determined that the temperature of the heating device 13 meets the preset condition.

The control method of the embodiment of the present application can be implemented by the control device 200 of the embodiment of the present application. Specifically, referring to FIG. 3, the control module 150 is configured to determine that the temperature of the heating device 13 meets the preset condition when the smaller of the inlet water temperature and the outlet water temperature is not greater than the defrost temperature threshold. In this way, it can be accurately determined whether the current heating device 13 has the conditions to participate in the defrosting operation.

Please refer to FIG. 2 and FIG. 4, specifically, the heating device 13 has a water inlet 131 and a water outlet 133. The water inlet temperature corresponds to the temperature of the water inlet 131. The temperature of the outlet water corresponds to the temperature of the outlet 133. The heating device 13 is respectively provided with temperature sensing elements (not shown in the figure) at the water inlet 131 and the water outlet 133, and the temperature of the inlet water and the temperature of the outlet water can be detected by the temperature sensing elements. It can be understood that by comparing the inlet water temperature and the outlet water temperature, the smaller one can be obtained.

In the case that the heating device 13 participates in the defrosting operation, and in the case where the smaller temperature of the water inlet 131 and the water outlet 133 is less than or equal to the defrosting temperature threshold, the control module 150 can determine that the pipes in the heating device 13 are relatively low. Low temperature makes it easy to freeze. It can be understood that in this case, the preset condition is that the smaller temperature of the water inlet 131 and the water outlet 133 is less than or equal to the defrosting temperature threshold, so that the control module 150 closes the first valve 17 and the heating device 13 does not participate in the defrosting temperature. Frost operation.

In some embodiments, the value range of the defrost temperature threshold is (0°C, 10°C). Specifically, the defrost temperature threshold can be adjusted according to specific conditions, or it can be calibrated through testing. In one example, the defrost temperature threshold is 5°C.

Please refer to FIG. 4 and FIG. 5, an air conditioning system 100 provided by an embodiment of the present application includes the control device 200 of any one of the foregoing embodiments.

In the above-mentioned air conditioning system 100, the heating device 13 participates in defrosting when it is in the on state, and does not participate in the defrosting when it is in the off state. The heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset value. Under conditions, the heating device 13 does not participate in defrosting, so that the heating device 13 can be fully utilized for defrosting without being frozen, so that the air conditioning system 100 can operate normally.

It should be pointed out that the foregoing explanations of the control method of the air-conditioning system 100 and the implementation and beneficial effects of the control device 200 are also applicable to the air-conditioning system 100 of this embodiment. In order to avoid redundancy, it will not be detailed here.

Please refer to FIG. 9, an air conditioning system 300 provided by an embodiment of the present application includes a memory 210, a processor 230, and computer executable instructions stored on the memory 210 and running on the processor 230, and the processor 230 is used to execute Computer-executable instructions are used to implement the steps of the control method of any of the above embodiments.

In the above-mentioned air conditioning system 300, the heating device 13 participates in the defrosting operation when the heating device 13 is in the on state, and does not participate in the defrosting operation when the heating device 13 is in the off state. The heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset Under conditions, the heating device 13 does not participate in defrosting, so that the heating device 13 can be fully utilized for defrosting without being frozen, so that the air conditioning system 100 can operate normally.

For example, the processor 230 is used to control the opening of the first valve 17 when the heating device 13 is in the open state so that the pipe between the heating device 13 and the outdoor heat exchanger 15 is connected, and the heating device 13 participates in the defrosting operation; and is used to control the first valve 17 to close when the heating device 13 is in the closed state to disconnect the pipe between the heating device 13 and the outdoor heat exchanger 15, thereby making the heating device 13 closed. The heating device 13 does not participate in the defrosting operation; and is used to control the first valve 17 to close or end the defrosting operation when the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets a preset condition.

Specifically, the memory 210 and the processor 230 may be integrated in the controller, or in the control board, or in the control box, etc. The processor 230 may be a central processing unit (Central Processing Unit, CPU), or other general-purpose processors, digital signal processors (Digital Signal Processors, DSPs), application specific integrated circuits (Application Specific Integrated Circuits, ASICs), ready-made Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.

The embodiment of the present application provides a non-volatile computer-readable storage medium containing computer-executable instructions. When the computer-executable instructions are executed by one or more processors, the processor can execute any of the above-mentioned implementations. Steps of the control method.

For example, when the program is executed by the processor, the steps of the following control method are implemented:

The computer-readable storage medium may be set in the air-conditioning system 300, or may be set in a terminal such as a server, and the air-conditioning system 300 can communicate with the terminal to obtain the corresponding program.

It can be understood that the computer-readable storage medium may include: any entity or device capable of carrying a computer program, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), and software distribution media, etc. The computer program includes computer program code. The computer program code may be in the form of source code, object code, executable file, or some intermediate forms, etc. The computer-readable storage medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random memory Access memory (RAM, Random Access Memory), and software distribution media, etc.

In some embodiments of the present application, the controller is a single-chip microcomputer chip that integrates a processor, memory, communication module, etc. The processor may refer to the processor included in the controller. The processor can be a central processing unit (Central Processing Unit, CPU), other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), ready-made programmable Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

Any process or method description in the flowchart or described in other ways herein can be understood as a module, segment or part of code that includes one or more executable instructions for implementing specific logical functions or steps of the process , And the scope of the preferred embodiments of the present application includes additional implementations, which may not be in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. This should It is understood by those skilled in the art to which the embodiments of this application belong.

The logic and/or steps represented in the flowchart or described in other ways herein, for example, can be considered as a sequenced list of executable instructions for implementing logic functions, and can be embodied in any computer-readable medium, For use by instruction execution systems, devices, or equipment (such as computer-based systems, systems including processing modules, or other systems that can fetch instructions from and execute instructions from instruction execution systems, devices, or equipment), or combine these instruction execution systems, devices Or equipment.

It should be understood that each part of the embodiments of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the foregoing embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if it is implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: Discrete logic circuits, application-specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

In the description of this specification, reference is made to the terms "one embodiment", "some embodiments", "certain embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples", etc. The description means that the specific feature, structure, material or feature described in combination with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and modifications can be made to these embodiments without departing from the principle and purpose of the present application. The scope of the application is defined by the claims and their equivalents.

Claims

A control method for an air conditioning system, wherein the air conditioning system includes an outdoor unit and a heating device, the outdoor unit includes an outdoor unit heat exchanger and a first valve, and the heating device passes through the first valve The pipeline is connected to the outdoor heat exchanger, and the control method includes:

In the case of obtaining a defrost signal, detecting the opening and closing state of the heating device;

When the heating device is in the open state, the first valve is controlled to open so that the pipe between the heating device and the heat exchanger of the outdoor machine is connected, so that the heating device participates in Defrosting operation;

When the heating device is in the closed state, the first valve is controlled to be closed to disconnect the pipe between the heating device and the heat exchanger of the outdoor machine, thereby making the heating device not Participate in the defrosting operation;

When the heating device participates in the defrosting operation and the temperature of the heating device meets a preset condition, the first valve is controlled to close, or the defrosting operation is ended.
The control method according to claim 1, wherein the air conditioning system includes an indoor unit, the outdoor unit includes a second valve, and the second valve connects the indoor unit and the outdoor unit heat exchanger, the Control methods include:

In the case of acquiring the defrost signal, detecting the current working mode of the indoor unit;

When the heating device is in a closed state or there is a mode conflict between the heating device and the indoor unit, the first valve is controlled to close so that the heating device and the outdoor unit heat exchanger are The pipe between the two parts is disconnected, so that the heating device does not participate in the defrosting operation, and the second valve is controlled to open so that the corresponding pipe between the indoor unit and the heat exchanger of the outdoor unit is connected. , So that the indoor unit participates in the defrosting operation;

When the heating device is in an on state and there is no mode conflict between the heating device and the indoor unit, control the first valve to open so that the heating device and the outdoor unit heat exchanger The pipes between the two are connected, so that the heating device participates in the defrosting operation;

When the heating device participates in the defrosting operation and the temperature of the heating device meets a preset condition, the first valve is controlled to close, and the second valve is controlled to open so that the corresponding The pipeline between the indoor unit and the heat exchanger of the outdoor unit is connected, so that the indoor unit participates in the defrosting operation.
The control method according to claim 2, wherein the control method comprises:

When the heating device is in the on state and there is no mode conflict between the heating device and the indoor unit, control the second valve to open so that the corresponding indoor unit and the outdoor unit exchange heat The pipes between the devices are connected, so that the indoor unit participates in the defrosting operation.
The control method according to any one of claims 1 to 3, wherein the temperature of the heating device includes an inlet water temperature and an outlet water temperature, and the preset condition includes a defrost temperature threshold,

The control method includes:

In the case that the smaller of the inlet water temperature and the outlet water temperature is not greater than the defrost temperature threshold, it is determined that the temperature of the heating device meets the preset condition.
The control method according to claim 4, wherein the value range of the defrosting temperature threshold is (0°C, 10°C).
The control method according to claim 1, wherein the control method comprises: when the heating device participates in the defrosting operation, controlling to issue a prompt that the heating device participates in the defrosting operation.
A control device for an air conditioning system, wherein the air conditioning system includes an outdoor unit and a heating device, the outdoor unit includes an outdoor unit heat exchanger and a first valve, and the heating device passes through the first valve The pipeline is connected to the heat exchanger of the outdoor machine, and the control device includes:

The acquisition module is used to acquire the defrost signal;

The detection module is used to detect the opening and closing state of the heating device;

The control module is used to control the opening of the first valve when the heating device is in the open state so that the pipeline between the heating device and the heat exchanger of the outdoor machine is connected, thereby enabling all The heating device participates in the defrosting operation; and

It is used to control the closing of the first valve to disconnect the pipe between the heating device and the heat exchanger of the outdoor machine when the heating device is in the closed state, thereby causing the heating device to be closed. The device does not participate in the defrosting operation; and

It is used to control the first valve to close or end the defrosting operation when the heating device participates in the defrosting operation and the temperature of the heating device meets a preset condition.
The control device according to claim 7, wherein the air-conditioning system includes an indoor unit, the outdoor unit includes a second valve, and the second valve connects the indoor unit and the outdoor unit heat exchanger, and The detection module is used to detect the current working mode of the indoor unit when the defrost signal is acquired,

The control module is used to control the first valve to close so that the heating device and the indoor unit are in a closed state or there is a mode conflict between the heating device and the indoor unit. The pipes between the heat exchangers of the outdoor unit are disconnected, so that the heating device does not participate in the defrosting operation, and the second valve is controlled to open to make the corresponding indoor unit and the outdoor unit heat exchanger The pipeline between the two is connected, so that the indoor unit participates in the defrosting operation; and

Used to control the opening of the first valve to exchange the heating device and the outdoor unit when the heating device is in an on state and there is no mode conflict between the heating device and the indoor unit The pipes between the heaters are connected, so that the heating device participates in the defrosting operation; and

It is used to control the first valve to close and control the second valve to open to make the corresponding The pipeline between the indoor unit and the heat exchanger of the outdoor unit is connected, so that the indoor unit participates in the defrosting operation.
The control device according to claim 8, wherein the control module is configured to control the first heating device when the heating device is in an on state and there is no mode conflict between the heating device and the indoor unit. The two valves are opened to make the corresponding pipes between the indoor unit and the heat exchanger of the outdoor unit conduct, so that the indoor unit participates in the defrosting operation.
The control device according to any one of claims 7-9, wherein the temperature of the heating device includes an inlet water temperature and an outlet water temperature, and the preset condition includes a defrost temperature threshold,

The control module is configured to determine that the temperature of the heating device meets the preset condition when the smaller temperature of the inlet water temperature and the outlet water temperature is not greater than the defrost temperature threshold.
The control device according to claim 10, wherein the value range of the defrosting temperature threshold is (0°C, 10°C).
The control device according to claim 7, wherein the control module is used to send a signal to the heating device, so that the heating device sends out a prompt to participate in the defrosting operation.
An air conditioning system, comprising the control device according to any one of claims 7-12.
The air-conditioning system according to claim 13, wherein the air-conditioning system includes a reminder, the reminder includes a buzzer, an LED light, a display screen, and a speaker, and the heating device has a specific change through an alarm sound At least one of regular lights, text on the display screen, and voice, etc. sends out a prompt message that the heating device participates in the defrosting operation
An air conditioning system, wherein the air conditioning system includes a memory, a processor, and computer-executable instructions stored in the memory and running on the processor, and the processor is used to execute the computer-executable instructions In order to realize the steps of the control method according to any one of claims 1-6.
A non-volatile computer-readable storage medium containing computer-executable instructions, wherein when the computer-executable instructions are executed by one or more processors, the processor is caused to execute claims 1-6 Steps of any one of the control methods.