阅读说明：本技术 压缩机的控制方法、装置、设备和水多联空调系统 (Control method, device and equipment of compressor and water multi-connected air conditioning system ) 是由 袁占彪 谷月明 黄承杰 于 2019-09-16 设计创作，主要内容包括：本申请涉及空调相关技术领域,尤其涉及一种压缩机的控制方法、装置、设备和水多联空调系统。其中,压缩机的控制方法,包括：获取工作状态的风盘总容量、热水发生器的实际出水温度和进水温度；基于工作状态的风盘总容量、实际出水温度和进水温度,计算压缩机的第一频率；控制压缩机以第一频率运行；基于目标出水温度、实际出水温度调节第一频率,得到第二频率,并控制压缩机以第二频率运行,使得当压缩机以第二频率运行时,实际出水温度不超出预设温度范围；其中,预设水温范围包含目标出水温度。(The application relates to the technical field of air conditioners, in particular to a control method, a control device and control equipment of a compressor and a water multi-connected air conditioning system. The control method of the compressor comprises the following steps: acquiring the total capacity of the air disc in a working state, the actual water outlet temperature and the actual water inlet temperature of the hot water generator; calculating a first frequency of the compressor based on the total capacity of the air disc, the actual water outlet temperature and the water inlet temperature in the working state; controlling the compressor to operate at a first frequency; adjusting the first frequency based on the target outlet water temperature and the actual outlet water temperature to obtain a second frequency, and controlling the compressor to operate at the second frequency, so that the actual outlet water temperature does not exceed the preset temperature range when the compressor operates at the second frequency; wherein the preset water temperature range comprises a target outlet water temperature.)

1. A control method of a compressor is applied to a water multi-connected air conditioning system, and comprises the following steps:

acquiring the total capacity of the air disc in a working state, the actual water outlet temperature and the actual water inlet temperature of the hot water generator;

calculating a first frequency of a compressor based on the total capacity of the air disc in the working state, the actual water outlet temperature and the water inlet temperature;

controlling the compressor to operate at a first frequency;

adjusting the first frequency based on the target outlet water temperature and the actual outlet water temperature to obtain a second frequency, and controlling the compressor to operate at the second frequency, so that the actual outlet water temperature does not exceed a preset temperature range when the compressor operates at the second frequency; wherein, the preset water temperature range comprises the target outlet water temperature.

2. The method of claim 1, wherein calculating a first frequency of a compressor based on the total capacity of the winddisk, the actual leaving water temperature, and the entering water temperature for the operating condition comprises:

calculating a correction coefficient of the temperature difference of inlet and outlet water; wherein the water inlet and outlet temperature difference correction coefficient is the product of the water inlet and outlet temperature difference and a preset coefficient, and the water inlet and outlet temperature difference is the difference between the actual water outlet temperature and the water inlet temperature;

calculating a third frequency; the third frequency is the result of the difference between the temperature of the inlet water and the outlet water and the product of the total capacity of the air disc in the working state and the air displacement of the compressor in a preset multiple;

judging whether the third frequency is greater than a preset maximum frequency of the compressor or not;

if so, setting the preset maximum frequency as a first frequency, otherwise, setting the third frequency as the first frequency.

3. The method of claim 1, wherein adjusting the first frequency to a second frequency based on the target leaving water temperature and the actual leaving water temperature comprises:

calculating the actual water outlet temperature change rate and the water outlet temperature difference; the outlet water temperature difference is the difference value between the target outlet water temperature and the actual outlet water temperature;

and adjusting the first frequency to obtain a second frequency based on the change rate of the water outlet temperature and the water outlet temperature difference.

4. The method of claim 3, wherein said adjusting the first frequency based on the rate of change of the leaving water temperature and the leaving water temperature difference to obtain a second frequency comprises:

when the change rate of the temperature of the outlet water is smaller than a first preset change rate and the temperature difference of the outlet water is larger than or equal to a preset temperature difference, the first frequency is increased by a first preset frequency to obtain a second frequency;

when the change rate of the temperature of the outlet water is greater than or equal to a first preset change rate and less than or equal to a second preset change rate, and the temperature difference of the outlet water is less than a preset temperature difference, the first frequency is reduced by a second preset frequency to obtain a second frequency;

and when the change rate of the temperature of the outlet water is greater than the second preset change rate, reducing the first preset frequency by the first frequency to obtain a second frequency.

5. The method of claim 3, further comprising:

every interval of first preset time, obtaining a third frequency based on the latest obtained outlet water temperature adjustment, the target outlet water temperature and the current compressor operation frequency, and controlling the compressor to operate at the third frequency, so that when the compressor operates at the third frequency, the actual outlet water temperature does not exceed the preset water temperature range; wherein, the preset water temperature range comprises the target outlet water temperature.

6. The method of claim 3, further comprising:

calculating a fourth frequency of the compressor at every second preset time interval based on the newly acquired total capacity of the air disc in the working state, the newly acquired actual outlet water temperature and the newly acquired inlet water temperature;

judging whether the fourth frequency is greater than the current compressor running frequency;

and if the fourth frequency is greater than the current compressor running frequency, controlling the compressor to run at the fourth frequency.

7. The method of claim 1, further comprising:

detecting the operation mode of the water multi-connected air-conditioning system; wherein the operation modes include: a cooling mode and a heating mode;

if the operation mode is a refrigeration mode, taking a first preset temperature as the target outlet water temperature;

and if the operation mode is a heating mode, taking a second preset temperature as the target outlet water temperature.

8. The method of claim 7, further comprising:

acquiring the temperature of a temperature controller and the actual temperature of an air disc;

if the operation mode is a refrigeration mode and the temperature of the temperature controller is greater than or equal to the actual temperature of the air disc, controlling the water multi-connected air-conditioning system to enter a standby state;

if the water multi-connected air-conditioning system is in a standby state, the operation mode is a refrigeration mode, and the difference obtained by subtracting the actual temperature of the air disc from the temperature of the temperature controller is smaller than a first preset value, controlling the water multi-connected air-conditioning system to enter the standby state; wherein, the first preset value is a negative number;

if the operation mode is a heating mode and the temperature of the temperature controller is less than or equal to the actual temperature of the air disc, controlling the water multi-connected air-conditioning system to enter a standby state;

if the water multi-connected air-conditioning system is in a standby state and the operation mode is a heating mode, and the difference obtained by subtracting the actual temperature of the air disc from the temperature of the temperature controller is less than a second preset value, controlling the water multi-connected air-conditioning system to enter the standby state; wherein the second preset value is a positive number.

9. The method of claim 1, wherein the obtaining the total capacity of the winddisk of the operating state comprises:

acquiring the number of the wind disks in the working state and the capacity of the wind disks in each working state;

and accumulating the capacity of the wind disks in each working state to obtain the total capacity of the wind disks in the working states.

10. The method of claim 9, wherein accumulating the capacity of the winddisks for each operating state to obtain a total capacity of the winddisks for the operating state comprises:

classifying the air disks based on the types of the air disks in each working state;

respectively calculating the total capacity of the wind disks in various working states;

and accumulating the total capacity of the wind disks in various working states to obtain the total capacity of the wind disks in the working states.

11. The method of claim 9, wherein the obtaining of the number of wind disks in the operating state and the capacity of the wind disks in each operating state comprises:

and acquiring the number of the wind disks in the working state and the capacity of each wind disk in the working state based on the IP address of the wind disks in the working state.

12. The control device of the compressor is characterized by being applied to a water multi-connected air conditioning system and comprising:

the acquisition module is used for acquiring the total capacity of the air disc in a working state, the actual water outlet temperature and the actual water inlet temperature of the hot water generator;

the calculating module is used for calculating a first frequency of the compressor based on the total capacity of the air disc in the working state, the actual water outlet temperature and the water inlet temperature;

a control module for controlling the compressor to operate at a first frequency;

the adjusting module is used for adjusting the first frequency based on the target outlet water temperature and the actual outlet water temperature to obtain a second frequency, and controlling the compressor to operate at the second frequency, so that when the compressor operates at the second frequency, the actual outlet water temperature does not exceed a preset temperature range; wherein, the preset water temperature range comprises the target outlet water temperature.

13. A control apparatus of a compressor, characterized by comprising:

a processor, and a memory coupled to the processor;

the memory is used for storing a computer program;

the processor is configured to invoke and execute the computer program in the memory to perform the method of any of claims 1-11.

14. A multiple air conditioning system, comprising: compressor, wind disk, and hot water generator and, a control device for a compressor as claimed in claim 13.

Technical Field

The application relates to the technical field of air conditioners, in particular to a control method, a control device and control equipment of a compressor and a water multi-connected air conditioning system.

Background

The traditional multi-split air conditioner generates the refrigeration effect by the heat exchange between low-temperature low-pressure steam generated by refrigerant throttling and indoor hot air. Compared with the traditional multi-split air conditioner, the multi-split air conditioner has the advantages of secondary heat exchange, comfortable operation, no excessive dehumidification, comfortable body feeling and the like.

When the water multi-connected air conditioning system runs at a low load, due to the delay of water heat exchange, the situation that the ambient temperature is lower than the set temperature of the temperature controller, but the actual outlet water temperature of the hot water generator exceeds the set outlet water temperature range of the system can occur.

Therefore, in a low-load operation state, due to the delay of the heat exchange of water, the system control of the unit is easy to show large fluctuation, which is mainly reflected in the frequent start and stop of the compressor, so that the service life of the compressor can be greatly shortened.

Disclosure of Invention

The application aims to provide a control method, a control device and control equipment of a compressor and a water multi-connected air conditioning system, so that the problems that in the related art, in a low-load operation state, due to the delay of heat exchange of water, the system control of a unit shows large fluctuation, and the compressor is frequently started and stopped are solved, and the service life of the compressor can be greatly shortened.

The purpose of the application is realized by the following technical scheme:

in a first aspect, a method for controlling a compressor is applied to a water multi-connected air conditioning system, and the method includes:

acquiring the total capacity of the air disc in a working state, the actual water outlet temperature and the actual water inlet temperature of the hot water generator;

calculating a first frequency of a compressor based on the total capacity of the air disc in the working state, the actual water outlet temperature and the water inlet temperature;

controlling the compressor to operate at a first frequency;

adjusting the first frequency based on the target outlet water temperature and the actual outlet water temperature to obtain a second frequency, and controlling the compressor to operate at the second frequency, so that when the compressor operates at the second frequency, the actual outlet water temperature does not exceed a preset temperature range; wherein, the preset water temperature range comprises the target outlet water temperature.

Optionally, based on the total capacity of the air disk, the actual outlet water temperature and the inlet water temperature of the working state, calculating a first frequency of the compressor, including:

calculating a correction coefficient of the temperature difference of inlet and outlet water; wherein the water inlet and outlet temperature difference correction coefficient is the product of the water inlet and outlet temperature difference and a preset coefficient, and the water inlet and outlet temperature difference is the difference between the actual water outlet temperature and the water inlet temperature;

calculating a third frequency; the third frequency is the result of the difference between the temperature of the inlet water and the outlet water and the product of the total capacity of the air disc in the working state and the air displacement of the compressor in a preset multiple;

judging whether the third frequency is greater than a preset maximum frequency of the compressor or not;

if so, setting the preset maximum frequency as a first frequency, otherwise, setting the third frequency as the first frequency.

Optionally, the adjusting, based on the target outlet water temperature, the first frequency to obtain a second frequency includes:

calculating the actual water outlet temperature change rate and the water outlet temperature difference; the outlet water temperature difference is the difference value between the target outlet water temperature and the actual outlet water temperature;

and adjusting the first frequency to obtain a second frequency based on the change rate of the water outlet temperature and the water outlet temperature difference.

Optionally, based on the change rate of the temperature of the outlet water and the temperature difference of the outlet water, adjusting the current operating frequency of the compressor to obtain a second frequency, including:

when the change rate of the temperature of the outlet water is smaller than a first preset change rate and the temperature difference of the outlet water is larger than or equal to a preset temperature difference, the current running frequency of the compressor is increased by a first preset frequency to obtain a second frequency;

when the change rate of the temperature of the outlet water is greater than or equal to a first preset change rate and less than or equal to a second preset change rate, and the temperature difference of the outlet water is less than a preset temperature difference, reducing the current running frequency of the compressor by a second preset frequency to obtain a second frequency;

and when the change rate of the temperature of the discharged water is greater than the second preset change rate, reducing the current running frequency of the compressor by a first preset frequency to obtain a second frequency.

Optionally, the method further includes:

every interval of first preset time, obtaining a third frequency based on the latest obtained outlet water temperature adjustment, the target outlet water temperature and the current compressor operation frequency, and controlling the compressor to operate at the third frequency, so that when the compressor operates at the third frequency, the actual outlet water temperature does not exceed the preset water temperature range; wherein, the preset water temperature range comprises the target outlet water temperature.

Optionally, the method further includes:

calculating a fourth frequency of the compressor at every second preset time interval based on the newly acquired total capacity of the air disc in the working state, the newly acquired actual outlet water temperature and the newly acquired inlet water temperature;

judging whether the fourth frequency is greater than the current compressor running frequency;

if so, controlling the compressor to operate at the fourth frequency.

Optionally, the method further includes:

detecting the operation mode of the water multi-connected air-conditioning system; wherein the operation modes include: a cooling mode and a heating mode;

if the operation mode is a refrigeration mode, taking a first preset temperature as the target outlet water temperature;

and if the operation mode is a heating mode, taking a second preset temperature as the target outlet water temperature.

Optionally, the method further includes:

acquiring the temperature of a temperature controller and the actual temperature of an air disc;

if the operation mode is a refrigeration mode, the temperature of the temperature controller is greater than or equal to the actual temperature of the air disc, and the water multi-connected air-conditioning system is controlled to enter a standby state;

if the water multi-connected air-conditioning system is in a standby state, the operation mode is a refrigeration mode, and the difference obtained by subtracting the actual temperature of the air disc from the temperature of the temperature controller is smaller than a first preset value, the water multi-connected air-conditioning system is controlled to enter the standby state; wherein, the first preset value is a negative number;

if the operation mode is a heating mode, the temperature of the temperature controller is less than or equal to the actual temperature of the air disc, and the water multi-connected air-conditioning system is controlled to enter a standby state;

if the water multi-connected air-conditioning system is in a standby state, the operation mode is a heating mode, and the difference obtained by subtracting the actual temperature of the air disc from the temperature of the temperature controller is smaller than a second preset value, the water multi-connected air-conditioning system is controlled to enter the standby state; wherein the second preset value is a positive number.

Optionally, the acquiring the total capacity of the wind disk in the working state includes:

acquiring the number of the wind disks in the working state and the capacity of the wind disks in each working state;

and accumulating the capacity of the wind disks in each working state to obtain the total capacity of the wind disks in the working states.

Optionally, accumulating the capacity of the wind disks in each working state to obtain the total capacity of the wind disks in the working state, includes:

classifying the air disks based on the types of the air disks in each working state;

respectively calculating the total capacity of the wind disks in various working states;

and accumulating the total capacity of the wind disks in various working states to obtain the total capacity of the wind disks in the working states.

Optionally, the acquiring the number of the winddisks in the working state and the capacity of the winddisk in each working state includes:

and acquiring the number of the wind disks in the working state and the capacity of each wind disk in the working state based on the IP address of the wind disks in the working state.

In a second aspect, a control device for a compressor is applied to a water multi-connected air conditioning system, and comprises:

the acquisition module is used for acquiring the total capacity of the air disc in a working state, the actual water outlet temperature and the actual water inlet temperature of the hot water generator;

the calculating module is used for calculating a first frequency of the compressor based on the total capacity of the air disc in the working state, the actual water outlet temperature and the water inlet temperature;

a control module for controlling the compressor to operate at a first frequency;

the adjusting module is used for adjusting the first frequency based on the target outlet water temperature and the actual outlet water temperature to obtain a second frequency, and controlling the compressor to operate at the second frequency, so that when the compressor operates at the second frequency, the actual outlet water temperature does not exceed a preset temperature range; wherein, the preset water temperature range comprises the target outlet water temperature.

In a third aspect, a control apparatus of a compressor includes:

a processor, and a memory coupled to the processor;

the memory is used for storing a computer program;

the processor is configured to invoke and execute the computer program in the memory to perform the method according to the first aspect of the application.

In a fourth aspect, a water multi-connected air conditioning system includes: a compressor, a wind disk, and a hot water generator and, as in the third aspect of the application, a control device for a compressor.

This application adopts above technical scheme, has following beneficial effect:

the application provides a control method of a compressor for a water multi-connected air conditioning system, and when the compressor works, the total capacity of an air disc in a working state, the actual water outlet temperature and the actual water inlet temperature of a hot water generator are firstly obtained; calculating a first frequency of the compressor based on the total capacity of the air disc, the actual water outlet temperature and the water inlet temperature in the working state; controlling the compressor to operate at a first frequency; adjusting the first frequency based on the target outlet water temperature and the actual outlet water temperature to obtain a second frequency, and controlling the compressor to operate at the second frequency, so that the actual outlet water temperature does not exceed the preset temperature range when the compressor operates at the second frequency; wherein the preset water temperature range comprises a target outlet water temperature. Therefore, when the water multi-connected air conditioning system runs at a low load, the compressor can run according to the first frequency or the second frequency, the outlet water temperature does not exceed the preset temperature range, the first frequency is adjusted based on the target outlet water temperature and the actual outlet water temperature to obtain the second frequency, the compressor is controlled to run at the second frequency, and the outlet water temperature can reach the target outlet water temperature after the compressor runs for a period of time. By the mode, the actual outlet water temperature is always within the set water temperature range of the system, the compressor does not need to be shut down emergently to adjust the actual outlet water temperature, the starting and stopping times of the compressor in the use of the water multi-connected air-conditioning system are reduced, and the service life of the compressor is prolonged.

Drawings

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

Fig. 1 is a schematic diagram of changes in water temperature and compressor power during low-load operation of the water multi-connected air conditioner provided by the present application.

Fig. 2 is a flowchart illustrating a control method of a compressor according to an embodiment of the present application;

fig. 3 is a partial flowchart of a control method of a compressor according to another embodiment of the present disclosure;

fig. 4 is a partial flowchart of a control method of a compressor according to another embodiment of the present disclosure;

fig. 5 is a partial flowchart of a control method of a compressor according to another embodiment of the present disclosure;

fig. 6 is a partial flowchart of a control method of a compressor according to another embodiment of the present disclosure;

fig. 7 is a block diagram of a control apparatus of a compressor according to another embodiment of the present application;

fig. 8 is a block diagram of a control apparatus of a compressor according to another embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.

The traditional multi-split air conditioner generates the refrigeration effect by the heat exchange between low-temperature low-pressure steam generated by refrigerant throttling and indoor hot air. Compared with the traditional multi-split air conditioner, the multi-split air conditioner has the advantages of secondary heat exchange, comfortable operation, no excessive dehumidification, comfortable body feeling and the like.

In order to better explain the scheme of the present invention, a water multi-connected air conditioning system in the present application is introduced below, and the water multi-connected air conditioning system in the present application is composed of a host (including an air conditioning outdoor unit, an indoor unit (a hot water generator)), an air panel temperature controller, a host display panel, a floor heating coil, a water distribution and collection device, and shielded communication lines connecting the various parts, and can generate cold/hot water in the hot water generator and send the cold/hot water to the air panel to cool/heat a space used by a user. The core component in the outdoor unit is a compressor. The communication protocol for connecting the indoor unit and the outdoor unit is RS485 industrial bus, and the communication protocols between the indoor unit and the air disc, between the air disc and the air disc temperature controller and between the indoor unit and the host display panel are CAN bus communication. The medium in the pipeline between the indoor unit and the outdoor unit is a refrigerant, and the medium in the pipeline between the indoor unit and the air disc and the floor heating is water. The main functions of the air disc temperature controller are that a user sets temperature, switches on and off, selects modes and the like, and the main functions of the host display panel are debugging and fault display before the unit is started. The main function of the waterway three-way valve is to switch the water flowing to the air disc and the floor heating coil.

Specifically, referring to fig. 1, when the system is in a refrigeration mode, according to a scheme in the related art, when the water multi-connected air conditioner operates at a low load, due to a delay phenomenon in a water path, the ambient temperature is lower than the set temperature of the temperature controller, but the outlet water temperature of the hot water generator exceeds the set water temperature of the system, at this time, the compressor may be stopped, and when the water temperature rises and is higher than the target outlet water temperature, the compressor is started again, that is, the compressor may be frequently started and stopped.