CN111174388B

CN111174388B - Operation control method and device, storage medium and multi-split system

Info

Publication number: CN111174388B
Application number: CN202010005134.8A
Authority: CN
Inventors: 卢浩贤; 李华松; 贺春辉; 张世航; 耿媛媛
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-12-15
Anticipated expiration: 2040-01-03
Also published as: CN111174388A

Abstract

The invention discloses an operation control method, an operation control device, a storage medium and a multi-split system, wherein the method comprises the following steps: acquiring the outdoor environment temperature, the target temperature and the indoor environment temperature of the multi-split system; the multi-split system is a cascade circulation system, comprising: a first temperature stage circulation system and a second temperature stage circulation system; the method for determining the operation condition of the multi-split air conditioning system according to the outdoor environment temperature comprises the following steps: the method comprises the following steps of (1) setting a first set working condition, a second set working condition and/or a third set working condition; under the determined operation condition, determining the operation mode of the multi-split system according to the target temperature, wherein the operation mode comprises the following steps: a first setting mode, a second setting mode, a third setting mode, a fourth setting mode, and/or a fifth setting mode; and under the determined operation mode, controlling the operation process of the multi-split air conditioning system according to the indoor environment temperature. According to the scheme, the problem that the comfort requirements of the users in different environments cannot be met can be solved, and the effect that the comfort requirements of the users in different environments can be met is achieved.

Description

Operation control method and device, storage medium and multi-split system

Technical Field

The invention belongs to the technical field of air conditioners, and particularly relates to an operation control method and device, a storage medium and a multi-split system, in particular to an operation control method and device of an ultrahigh-temperature cascade type central multi-split system and an energy utilization mode, a storage medium and a multi-split system.

Background

Some household water machines are aged in function, the internal machine and the external machine cannot be linked, refrigeration is carried out only by providing a fixed water temperature, and the comfort is poor. Some multi-split air conditioners use refrigerants as refrigerants to achieve indoor refrigerating or heating effects, but the multi-split air conditioners have large air outlet temperature difference, are unscientific in operation process and poor in energy conservation, and are particularly easy to cause the situations due to poor use habits.

Some multi-split air conditioners, such as water multi-split air conditioners, cannot meet the comfort requirement at the highest operating water temperature in cold regions with large heating load requirements.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The present invention aims to solve the above-mentioned drawbacks, and provide an operation control method, an operation control device, a storage medium, and a multi-split system, so as to solve the problem that the multi-split system cannot meet the comfort requirements of users in different environments, and achieve the effect that the multi-split system can meet the comfort requirements of users in different environments.

The invention provides an operation control method, which comprises the following steps: acquiring the outdoor environment temperature, the target temperature and the indoor environment temperature of the multi-split system; the multi-split system is a cascade circulating system; the cascade circulation system includes: the system comprises a first temperature stage circulating system and a second temperature stage circulating system, wherein the operating temperature of the first temperature stage circulating system is lower than that of the second temperature stage circulating system; determining the operation condition of the multi-split system according to the acquired outdoor environment temperature; wherein, operating condition includes: the method comprises the following steps of (1) setting a first set working condition, a second set working condition and/or a third set working condition; under the determined operation condition, determining the operation mode of the multi-split system according to the obtained target temperature; an operational mode comprising: a first setting mode, a second setting mode, a third setting mode, a fourth setting mode, and/or a fifth setting mode; and under the determined operation mode, controlling the operation process of the multi-split air conditioning system according to the acquired indoor environment temperature.

Optionally, determining the operation condition of the multi-split system comprises: determining the relation between the acquired outdoor environment temperature and the lower limit and the upper limit of a first set temperature range; if the outdoor environment temperature is larger than the upper limit of the first set temperature range, determining the operation working condition of the multi-split air-conditioning system as a first set working condition; if the outdoor environment temperature is greater than the lower limit of the first set temperature range and less than or equal to the upper limit of the first set temperature range, determining the operation working condition of the multi-split air-conditioning system as a second set working condition; and if the outdoor environment temperature is less than or equal to the lower limit of the first set temperature range, determining the operation working condition of the multi-split air-conditioning system as a third set working condition.

Optionally, determining an operation mode of the multi-split system includes: under a first set working condition, determining the relation between the acquired target temperature and the upper limit and the lower limit of a second set temperature range; if the target temperature is higher than the upper limit of the second set temperature range under the first set working condition, determining the operation mode of the multi-split air-conditioning system as a first set mode; if the target temperature is larger than the lower limit of the second set temperature range and smaller than or equal to the upper limit of the second set temperature range under the first set working condition, determining the operation mode of the multi-split air-conditioning system as a second set mode; and if the target temperature is less than or equal to the lower limit of the second set temperature range under the first set working condition, determining the operation mode of the multi-split air-conditioning system to be a third set mode.

Optionally, determining an operation mode of the multi-split system further includes: under a second set working condition, determining the relationship between the acquired target temperature and the upper limit and the lower limit of a second set temperature range; if the target temperature is higher than the upper limit of the second set temperature range under the second set working condition, determining the operation mode of the multi-split air-conditioning system as a fourth set mode; if the target temperature is greater than the lower limit of the second set temperature range and less than or equal to the upper limit of the second set temperature range under the second set working condition, determining the operation mode of the multi-split air-conditioning system to be a third set mode; and if the target temperature is less than or equal to the lower limit of the second set temperature range under the second set working condition, determining the operation mode of the multi-split air-conditioning system to be the second set mode.

Optionally, determining an operation mode of the multi-split system further includes: under a third set working condition, determining the relation between the acquired target temperature and the upper limit and the lower limit of the second set temperature range; if the target temperature is higher than the upper limit of the second set temperature range under the third set working condition, determining that the operation mode of the multi-split air-conditioning system is a fifth set mode; if the target temperature is larger than the lower limit of the second set temperature range and smaller than or equal to the upper limit of the second set temperature range under the third set working condition, determining that the operation mode of the multi-split air-conditioning system is a fourth set mode; and if the target temperature is less than or equal to the lower limit of the second set temperature range under the third set working condition, determining the operation mode of the multi-split air-conditioning system to be a third set mode.

Optionally, controlling an operation process of the multi-split air conditioning system includes: under a first setting mode, a first compressor of a first temperature stage circulating system in the multi-split air conditioning system is controlled to be closed, a second compressor of a second temperature stage circulating system in the multi-split air conditioning system is controlled to be opened, and an auxiliary electric heating system in the multi-split air conditioning system is controlled to be closed; determining whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a first set temperature in a first set mode; if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the first set temperature in the first set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system; and if the temperature difference between the target temperature and the indoor environment temperature is less than the first set temperature in the first set mode, controlling the operating frequency of the second compressor to reduce the first set frequency to the first operating frequency, and controlling the second compressor to operate according to the first operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to the negative value of the first set temperature, and controlling the second compressor to operate according to the set first lowest frequency.

Optionally, controlling an operation process of the multi-split air conditioning system further includes: under a second setting mode, controlling a first compressor of a first temperature-level circulating system in the multi-split system to be closed, controlling a second compressor of a second temperature-level circulating system in the multi-split system to be opened, and controlling an auxiliary electric heating system in the multi-split system to be closed; determining whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a second set temperature in a second set mode; if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to a second set temperature in a second set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system; and if the temperature difference between the target temperature and the indoor environment temperature is less than a second set temperature in a second set mode, controlling the operating frequency of the second compressor to reduce the second set frequency to a second operating frequency, and controlling the second compressor to operate according to the second operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the second set temperature, and controlling the second compressor to operate according to a set second lowest frequency.

Optionally, controlling an operation process of the multi-split air conditioning system further includes: under a third setting mode, controlling a first compressor of a first temperature-level circulating system in the multi-split system to be closed, controlling a second compressor of a second temperature-level circulating system in the multi-split system to be opened, and controlling an auxiliary electric heating system in the multi-split system to be opened; determining whether a temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a third set value and whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a third set temperature in a third set mode; if the temperature difference between the target temperature and the indoor environment temperature is equal to a third set value in a third set mode, controlling the auxiliary electric heating system to be closed; if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to a third set temperature in a third set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system; and if the temperature difference between the target temperature and the indoor environment temperature is less than a third set temperature in a third set mode, controlling the operating frequency of the second compressor to reduce the third set frequency to a third operating frequency, and controlling the second compressor to operate according to the third operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the third set temperature, and controlling the second compressor to operate according to a set third lowest frequency.

Optionally, controlling an operation process of the multi-split air conditioning system further includes: under a fourth setting mode, controlling a first compressor of a first temperature-level circulating system in the multi-split system to be started, controlling a second compressor of a second temperature-level circulating system in the multi-split system to be started, and controlling an auxiliary electric heating system in the multi-split system to be started; in a fourth setting mode, determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a fourth setting value, and determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a fourth setting temperature; if the temperature difference between the target temperature and the indoor environment temperature is equal to a fourth set value in a fourth set mode, controlling the auxiliary electric heating system to be closed, and controlling the first compressor to operate according to a set fourth natural frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the fourth set temperature, and controlling the first compressor to stop; if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fourth set temperature in the fourth set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system; and if the temperature difference between the target temperature and the indoor environment temperature is less than the fourth set temperature in the fourth set mode, controlling the operating frequency of the second compressor to reduce the fourth set frequency to the fourth operating frequency, and controlling the second compressor to operate according to the fourth operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to the negative value of the fourth set temperature, and controlling the second compressor to operate according to the set fourth lowest frequency.

Optionally, controlling an operation process of the multi-split air conditioning system further includes: under a fifth setting mode, controlling a first compressor of a first temperature stage circulating system in the multi-split system to be started, controlling a second compressor of a second temperature stage circulating system in the multi-split system to be started, and controlling an auxiliary electric heating system in the multi-split system to be started; in a fifth setting mode, determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a fifth setting value, and determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a fifth setting temperature; if the temperature difference between the target temperature and the indoor environment temperature is equal to a fifth set value in a fifth set mode, controlling the auxiliary electric heating system to be closed, and controlling the first compressor to operate according to a set fifth natural frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the fifth set temperature, and controlling the first compressor to stop; if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fifth set temperature in the fifth set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system; and if the temperature difference between the target temperature and the indoor environment temperature is less than the fifth set temperature in the fifth set mode, controlling the operating frequency of the second compressor to reduce the fifth set frequency to the fifth operating frequency, and controlling the second compressor to operate according to the fifth operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to the negative value of the fifth set temperature, and controlling the second compressor to operate according to the set fifth lowest frequency.

In accordance with the above method, another aspect of the present invention provides an operation control apparatus, including: the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the outdoor environment temperature, the target temperature and the indoor environment temperature of the multi-split system; the multi-split system is a cascade circulating system; the cascade circulation system includes: the system comprises a first temperature stage circulating system and a second temperature stage circulating system, wherein the operating temperature of the first temperature stage circulating system is lower than that of the second temperature stage circulating system; the determining unit is used for determining the operation condition of the multi-split system according to the acquired outdoor environment temperature; wherein, operating condition includes: the method comprises the following steps of (1) setting a first set working condition, a second set working condition and/or a third set working condition; the determining unit is further used for determining the operation mode of the multi-split system according to the acquired target temperature under the determined operation condition; an operational mode comprising: a first setting mode, a second setting mode, a third setting mode, a fourth setting mode, and/or a fifth setting mode; and the control unit is used for controlling the operation process of the multi-split system according to the acquired indoor environment temperature in the determined operation mode.

Optionally, the determining unit determines an operation condition of the multi-split system, including: determining the relation between the acquired outdoor environment temperature and the lower limit and the upper limit of a first set temperature range; if the outdoor environment temperature is larger than the upper limit of the first set temperature range, determining the operation working condition of the multi-split air-conditioning system as a first set working condition; if the outdoor environment temperature is greater than the lower limit of the first set temperature range and less than or equal to the upper limit of the first set temperature range, determining the operation working condition of the multi-split air-conditioning system as a second set working condition; and if the outdoor environment temperature is less than or equal to the lower limit of the first set temperature range, determining the operation working condition of the multi-split air-conditioning system as a third set working condition.

Optionally, the determining unit determines an operation mode of the multi-split system, including: under a first set working condition, determining the relation between the acquired target temperature and the upper limit and the lower limit of a second set temperature range; if the target temperature is higher than the upper limit of the second set temperature range under the first set working condition, determining the operation mode of the multi-split air-conditioning system as a first set mode; if the target temperature is larger than the lower limit of the second set temperature range and smaller than or equal to the upper limit of the second set temperature range under the first set working condition, determining the operation mode of the multi-split air-conditioning system as a second set mode; and if the target temperature is less than or equal to the lower limit of the second set temperature range under the first set working condition, determining the operation mode of the multi-split air-conditioning system to be a third set mode.

Optionally, the determining unit determines an operation mode of the multi-split system, and further includes: under a second set working condition, determining the relationship between the acquired target temperature and the upper limit and the lower limit of a second set temperature range; if the target temperature is higher than the upper limit of the second set temperature range under the second set working condition, determining the operation mode of the multi-split air-conditioning system as a fourth set mode; if the target temperature is greater than the lower limit of the second set temperature range and less than or equal to the upper limit of the second set temperature range under the second set working condition, determining the operation mode of the multi-split air-conditioning system to be a third set mode; and if the target temperature is less than or equal to the lower limit of the second set temperature range under the second set working condition, determining the operation mode of the multi-split air-conditioning system to be the second set mode.

Optionally, the determining unit determines an operation mode of the multi-split system, and further includes: under a third set working condition, determining the relation between the acquired target temperature and the upper limit and the lower limit of the second set temperature range; if the target temperature is higher than the upper limit of the second set temperature range under the third set working condition, determining that the operation mode of the multi-split air-conditioning system is a fifth set mode; if the target temperature is larger than the lower limit of the second set temperature range and smaller than or equal to the upper limit of the second set temperature range under the third set working condition, determining that the operation mode of the multi-split air-conditioning system is a fourth set mode; and if the target temperature is less than or equal to the lower limit of the second set temperature range under the third set working condition, determining the operation mode of the multi-split air-conditioning system to be a third set mode.

Optionally, the control unit controls an operation process of the multi-split system, including: under a first setting mode, a first compressor of a first temperature stage circulating system in the multi-split air conditioning system is controlled to be closed, a second compressor of a second temperature stage circulating system in the multi-split air conditioning system is controlled to be opened, and an auxiliary electric heating system in the multi-split air conditioning system is controlled to be closed; determining whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a first set temperature in a first set mode; if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the first set temperature in the first set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system; and if the temperature difference between the target temperature and the indoor environment temperature is less than the first set temperature in the first set mode, controlling the operating frequency of the second compressor to reduce the first set frequency to the first operating frequency, and controlling the second compressor to operate according to the first operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to the negative value of the first set temperature, and controlling the second compressor to operate according to the set first lowest frequency.

Optionally, the control unit controls an operation process of the multi-split system, and further includes: under a second setting mode, controlling a first compressor of a first temperature-level circulating system in the multi-split system to be closed, controlling a second compressor of a second temperature-level circulating system in the multi-split system to be opened, and controlling an auxiliary electric heating system in the multi-split system to be closed; determining whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a second set temperature in a second set mode; if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to a second set temperature in a second set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system; and if the temperature difference between the target temperature and the indoor environment temperature is less than a second set temperature in a second set mode, controlling the operating frequency of the second compressor to reduce the second set frequency to a second operating frequency, and controlling the second compressor to operate according to the second operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the second set temperature, and controlling the second compressor to operate according to a set second lowest frequency.

Optionally, the control unit controls an operation process of the multi-split system, and further includes: under a third setting mode, controlling a first compressor of a first temperature-level circulating system in the multi-split system to be closed, controlling a second compressor of a second temperature-level circulating system in the multi-split system to be opened, and controlling an auxiliary electric heating system in the multi-split system to be opened; determining whether a temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a third set value and whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a third set temperature in a third set mode; if the temperature difference between the target temperature and the indoor environment temperature is equal to a third set value in a third set mode, controlling the auxiliary electric heating system to be closed; if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to a third set temperature in a third set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system; and if the temperature difference between the target temperature and the indoor environment temperature is less than a third set temperature in a third set mode, controlling the operating frequency of the second compressor to reduce the third set frequency to a third operating frequency, and controlling the second compressor to operate according to the third operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the third set temperature, and controlling the second compressor to operate according to a set third lowest frequency.

Optionally, the control unit controls an operation process of the multi-split system, and further includes: under a fourth setting mode, controlling a first compressor of a first temperature-level circulating system in the multi-split system to be started, controlling a second compressor of a second temperature-level circulating system in the multi-split system to be started, and controlling an auxiliary electric heating system in the multi-split system to be started; in a fourth setting mode, determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a fourth setting value, and determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a fourth setting temperature; if the temperature difference between the target temperature and the indoor environment temperature is equal to a fourth set value in a fourth set mode, controlling the auxiliary electric heating system to be closed, and controlling the first compressor to operate according to a set fourth natural frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the fourth set temperature, and controlling the first compressor to stop; if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fourth set temperature in the fourth set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system; and if the temperature difference between the target temperature and the indoor environment temperature is less than the fourth set temperature in the fourth set mode, controlling the operating frequency of the second compressor to reduce the fourth set frequency to the fourth operating frequency, and controlling the second compressor to operate according to the fourth operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to the negative value of the fourth set temperature, and controlling the second compressor to operate according to the set fourth lowest frequency.

Optionally, the control unit controls an operation process of the multi-split system, and further includes: under a fifth setting mode, controlling a first compressor of a first temperature stage circulating system in the multi-split system to be started, controlling a second compressor of a second temperature stage circulating system in the multi-split system to be started, and controlling an auxiliary electric heating system in the multi-split system to be started; in a fifth setting mode, determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a fifth setting value, and determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a fifth setting temperature; if the temperature difference between the target temperature and the indoor environment temperature is equal to a fifth set value in a fifth set mode, controlling the auxiliary electric heating system to be closed, and controlling the first compressor to operate according to a set fifth natural frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the fifth set temperature, and controlling the first compressor to stop; if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fifth set temperature in the fifth set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system; and if the temperature difference between the target temperature and the indoor environment temperature is less than the fifth set temperature in the fifth set mode, controlling the operating frequency of the second compressor to reduce the fifth set frequency to the fifth operating frequency, and controlling the second compressor to operate according to the fifth operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to the negative value of the fifth set temperature, and controlling the second compressor to operate according to the set fifth lowest frequency.

In accordance with another aspect of the present invention, there is provided a multi-split system, including: the operation control device described above.

In accordance with the above method, a further aspect of the present invention provides a storage medium comprising: the storage medium has stored therein a plurality of instructions; the instructions are used for loading and executing the operation control method by the processor.

In accordance with the above method, a further aspect of the present invention provides a multi-split system, including: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; wherein the instructions are stored in the memory, and loaded by the processor and execute the operation control method.

According to the scheme provided by the invention, through monitoring different environmental temperatures and user load requirements, bidirectional control is carried out according to the environmental temperatures and the user load requirements, the comfortable feeling of the user is improved, and the energy conservation is also considered.

Furthermore, the scheme of the invention can change the problems of non-energy saving and non-comfort caused by unreasonable control under high load output by taking the user comfort as the aim and taking the energy saving performance into consideration and taking the environment temperature and the user load demand as the judgment basis to control the load, thereby improving the user comfort.

Further, according to the scheme of the invention, different environmental temperatures and user load requirements are monitored by utilizing a cascade type double system formed by the high-temperature-level circulating system and the low-temperature-level circulating system, bidirectional control is performed according to the environmental temperatures and the user load requirements, the comfortable feeling of a user is improved, and the energy conservation is also considered.

Furthermore, according to the scheme of the invention, the cascade type double-system formed by the high-temperature-level circulating system and the low-temperature-level circulating system is utilized, the comfort of the user is taken as the aim, the energy-saving performance is considered, the load supply control is carried out by taking the environment temperature and the load demand of the user as the judgment basis, and the comfort feeling of the user in different environments can be improved.

Furthermore, according to the scheme of the invention, the user comfort is taken as the purpose, the energy saving performance is taken into consideration, the load control is carried out by taking the environment temperature and the user load demand as the judgment basis, and the cascade type double system formed by the high-temperature-level circulating system and the low-temperature-level circulating system can be utilized, so that the problems of non-energy saving and non-comfort caused by unreasonable control under high load output can be solved, the user comfort is improved, the energy saving performance is taken into consideration, and the user experience is good.

Therefore, according to the scheme provided by the invention, different environment temperatures and user load requirements are monitored by utilizing the cascade type double system formed by the high-temperature-level circulating system and the low-temperature-level circulating system, and the load supply mode is adjusted according to the environment temperatures and the user load requirements, so that the problem that the multi-split system cannot meet the comfort requirements of users in different environments is solved, and the effect that the multi-split system can meet the comfort requirements of the users in different environments is achieved.

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

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic flow chart diagram illustrating an embodiment of an operation control method according to the present invention;

FIG. 2 is a schematic flow chart illustrating an embodiment of determining an operating condition of a multi-split system according to the method of the present invention;

FIG. 3 is a flowchart illustrating an embodiment of determining an operation mode of a multi-split system under a first set operation condition according to the method of the present invention;

FIG. 4 is a flowchart illustrating an embodiment of determining an operation mode of the multi-split system under a second predetermined condition according to the method of the present invention;

FIG. 5 is a flowchart illustrating an embodiment of determining an operation mode of a multi-split system under a third predetermined condition in the method of the present invention;

FIG. 6 is a flowchart illustrating an embodiment of a method for controlling an operation process of a multi-split system in a first setting mode according to the present invention;

FIG. 7 is a flowchart illustrating an embodiment of a method for controlling an operation process of a multi-split system in a second setting mode according to the present invention;

FIG. 8 is a flowchart illustrating an embodiment of a method for controlling an operation process of a multi-split system in a third setting mode according to the present invention;

FIG. 9 is a flowchart illustrating an embodiment of a method for controlling an operation process of a multi-split system in a fourth setting mode according to the present invention;

FIG. 10 is a flowchart illustrating an embodiment of a method for controlling an operation process of a multi-split system in a fifth setting mode according to the present invention;

FIG. 11 is a schematic structural diagram of an embodiment of the operation control device of the present invention;

FIG. 12 is a schematic diagram of an embodiment of a multiple water system;

fig. 13 is a schematic structural diagram of an embodiment of a cascade dual cycle system in a multi-split system according to the present invention;

fig. 14 is a schematic diagram illustrating an overall control flow of an embodiment of a multi-split system according to the present invention;

fig. 15 is a schematic diagram illustrating an operation principle of an embodiment of a cascade dual cycle system in a multi-split system according to the present invention;

fig. 16 is a control flowchart illustrating a first setting mode S1 of the multi-split system according to an embodiment of the present invention;

fig. 17 is a control flowchart illustrating a second setting mode S2 of the multi-split system according to an embodiment of the present invention;

fig. 18 is a control flowchart illustrating a third setting mode S3 of the multi-split system according to an embodiment of the present invention;

fig. 19 is a control flowchart illustrating a fourth setting mode S4 of the multi-split system according to an embodiment of the present invention;

fig. 20 is a control flowchart illustrating a fifth setting mode S5 of the multi-split system according to an embodiment of the present invention.

The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:

1-high temperature compressor (high temperature compressor can be with electric heater); 11-a first exhaust gas temperature sensing bag; 12-a first high voltage switch; 13-a first high pressure sensor; 14-a first air-breathing thermal bulb; 15-a first heating low-voltage switch; 16-a first refrigeration low-voltage switch; 2-a four-way valve; 3-steam separation; 4-a condensation evaporator; 41-a first ambient temperature bulb; 42-first defrosting bulb; 43-a first electronic expansion valve; 44-first refrigerant liquid pipe temperature sensing bulb; 45-a first refrigerant air pipe temperature sensing bulb; 46-a second electronic expansion valve; 5-a water side heat exchanger; 51-a first water outlet temperature sensing bulb; 52-a first flow switch; 53-a first expansion valve; 54-a water pump; 55-safety valve; 56-auxiliary electric heater; 57-a filter; 58-first antifreezing thermal bulb; 59-a first water inlet temperature sensing bulb; 6-low temperature compressor (low temperature compressor can be with electric heater); 61-a first low-voltage switch; 62-a second exhaust bulb; 63-a second high voltage switch; 7-a first internal machine; 8-a second inner machine; 9-a third inner machine; 102-an obtaining unit; 104-a determination unit; 106-control unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

According to an embodiment of the present invention, an operation control method is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The operation control method may be applied to a multi-split system having a cascade circulation system, and may include: step S110 to step S140.

At step S110, the outdoor environment temperature, the target temperature and the indoor environment temperature of the multi-split air conditioning system are obtained, that is, the outdoor environment temperature of the multi-split air conditioning system is obtained, and the target temperature and the indoor environment temperature of the multi-split air conditioning system are obtained. For example: and outdoor ambient temperature, such as a temperature value detected by an ambient temperature sensing bulb. The target temperature, such as a temperature value set by the end user via the hand operator, i.e., a user set value. And indoor environment temperature, such as a temperature value detected by a return air temperature sensing bulb. Wherein, the multi-split system is a cascade circulation system. The cascade circulation system may include: the system comprises a first temperature stage circulating system and a second temperature stage circulating system, wherein the operating temperature of the first temperature stage circulating system is lower than that of the second temperature stage circulating system.

Specifically, the first temperature stage circulation system is a low temperature stage circulation system, and the second temperature stage circulation system is a high temperature stage circulation system. That is, the cascade circulation system is divided into a low-temperature stage circulation system and a high-temperature stage circulation system.

In the low-temperature-stage circulating system, a low-temperature-stage working medium absorbs heat of outdoor air in an evaporator, the low-temperature-stage working medium is changed into a gas state at the same temperature and the same pressure from a low-temperature low-pressure gas-liquid mixed state, the gas-state low-pressure working medium enters a low-temperature-stage compressor and is compressed into a high-temperature high-pressure gas-state working medium, the high-temperature high-pressure gas-state working medium enters an evaporative condenser to release heat and is condensed into a high-temperature high-pressure liquid working medium, the high-temperature high-pressure liquid working medium is reduced in pressure by a low-temperature-stage throttling.

In the high-temperature stage circulating system, a high-temperature stage working medium absorbs heat emitted by a low-temperature stage working medium in an evaporative condenser, the low-temperature and low-pressure gas-liquid mixed state is changed into a gas state with the same temperature and the same pressure, the gas state high-temperature working medium enters a high-temperature stage compressor and is compressed into a high-temperature and high-pressure gas state working medium, the gas state high-temperature working medium enters the condenser to release heat and is condensed into a saturated liquid state working medium with the same temperature and the same pressure, the saturated liquid state working medium is throttled into the low-temperature and low-pressure gas-liquid mixed state working medium through a high-.

At step S120, determining an operation condition of the multi-split air conditioning system according to the acquired outdoor ambient temperature. The operation conditions may include: the first set operating condition, the second set operating condition and/or the third set operating condition.

Optionally, in step S120, the operation condition of the multi-split system is determined according to the acquired outdoor ambient temperature, which may be referred to in the following exemplary description.

The following further describes a specific process of determining the operating condition of the multi-split system in step S120, with reference to a flowchart of an embodiment of determining the operating condition of the multi-split system in the method shown in fig. 2, where the specific process may include: step S210 to step S240.

Step S210, determining a relationship between the acquired outdoor ambient temperature and a lower limit and an upper limit of the first set temperature range. The first set temperature range may be a set temperature range between a first temperature a and a second temperature b. The lower limit of the first set temperature range may be a first temperature a, and the upper limit of the first set temperature range may be a second temperature b. The lower limit a of the first set temperature range is smaller than the upper limit b of the first set temperature range.

For example: and judging the temperature value detected by the environment temperature sensing bulb, namely judging the relation between the environment temperature (namely the outdoor environment temperature or the outer ring temperature) and the lower limit a and the upper limit b of the first set temperature range.

Step S220, if the outdoor ambient temperature is greater than the upper limit of the first set temperature range, that is, the outdoor ambient temperature is greater than the upper limit b of the first set temperature range, determining the operating condition of the multi-split air-conditioning system as the first set condition.

For example: and judging the temperature value detected by the environment temperature sensing bulb, namely judging the relation between the environment temperature (namely the outdoor environment temperature or the outer ring temperature) and the lower limit a of the first set temperature range and the upper limit b of the first set temperature range, if the environment temperature (namely the outdoor environment temperature or the outer ring temperature) is judged to be greater than the upper limit b of the first set temperature range, if the outdoor environment temperature is greater than the upper limit b of the first set temperature range, determining the operation working condition of the multi-split air-conditioning system as the first set working condition, and further executing the control process under the first set working condition.

In step S230, if the outdoor ambient temperature is greater than the lower limit of the first set temperature range and less than or equal to the upper limit of the first set temperature range, that is, the outdoor ambient temperature is greater than the lower limit a of the first set temperature range and less than or equal to the upper limit b of the first set temperature range, the operating condition of the multi-split air-conditioning system is determined to be the second set condition.

For example: and judging the temperature value detected by the environment temperature sensing bulb, namely judging the relation between the environment temperature (namely, the outdoor environment temperature or the outer ring temperature) and the lower limit a of the first set temperature range and the upper limit b of the first set temperature range, if judging whether the environment temperature (namely, the outdoor environment temperature or the outer ring temperature) is greater than the lower limit a of the first set temperature range and is less than or equal to the upper limit b of the first set temperature range, if the outdoor environment temperature is greater than the lower limit a of the first set temperature range and is less than or equal to the upper limit b of the first set temperature range, determining the operation working condition of the multi-split air system as a second set working condition, and further executing the control process under the second set working condition.

In step S240, if the outdoor ambient temperature is less than or equal to the lower limit of the first set temperature range, that is, the outdoor ambient temperature is less than or equal to the lower limit a of the first set temperature range, the operation condition of the multi-split air-conditioning system is determined to be a third set condition.

For example: and judging the temperature value detected by the environment temperature sensing bulb, namely judging the relation between the environment temperature (namely the outdoor environment temperature or the outer ring temperature) and the lower limit a of the first set temperature range and the upper limit b of the first set temperature range, if the environment temperature (namely the outdoor environment temperature or the outer ring temperature) is judged to be less than or equal to the lower limit a of the first set temperature range, if the outdoor environment temperature is less than or equal to the lower limit a of the first set temperature range, determining the operation working condition of the multi-split air system as a third set working condition, and further executing the control process under the third set working condition.

Therefore, the operation condition of the multi-split air-conditioning system is determined according to the relation between the acquired outdoor environment temperature and the upper limit and the lower limit of the first set temperature range, and then the operation mode of the multi-split air-conditioning system can be determined according to different operation conditions, so that the corresponding operation mode can be determined according to different operation conditions, and the comfort requirements of users under different operation conditions are met.

At step S130, under the determined operation condition, an operation mode of the multi-split system is determined according to the acquired target temperature. The operation modes can include: a first setting mode, a second setting mode, a third setting mode, a fourth setting mode, and/or a fifth setting mode. For example: the first setting mode is the mode S1, the second setting mode is the mode S2, the third setting mode is the mode S3, the fourth setting mode is the mode S4, and the fifth setting mode is the mode S5.

Optionally, in the step S130, under the determined operation condition, determining an operation mode of the multi-split system according to the acquired target temperature, which may include: the following determination conditions, namely the determination conditions for determining the operation mode of the multi-split air-conditioning system under the first set operating condition, the second set operating condition and the third set operating condition respectively, can be specifically referred to the following exemplary description.

The first determination case: determining an operation mode of the multi-split system may include: and determining a first process of the operation mode of the multi-split system under the first set working condition.

The following further describes, with reference to a flowchart of an embodiment of determining the operation mode of the multi-split air-conditioning system under the first set operating condition in the method shown in fig. 3, a specific process of determining the operation mode of the multi-split air-conditioning system under the first set operating condition may include: step S310 to step S340.

Step S310, under the first set working condition, determining the relation between the acquired target temperature and the upper limit and the lower limit of the second set temperature range. The second set temperature range may be a set temperature range between the third temperature N and the fourth temperature M. The lower limit of the second set temperature range may be the third temperature N, and the upper limit of the second set temperature range may be the fourth temperature M. The lower limit N of the second set temperature range is less than the upper limit M of the second set temperature range.

For example: under a first set condition, namely when the ambient temperature (namely the outdoor ambient temperature or the outer ring temperature) > is higher than the upper limit b of the first set temperature range, the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range is determined.

In step S320, if the target temperature is greater than the upper limit of the second set temperature range under the first set condition, that is, if the target temperature is greater than the upper limit M of the second set temperature range if the user setting value is greater than the upper limit M of the second set temperature range, it is determined that the operation mode of the multi-split air-conditioning system is the first set mode, that is, it is determined that the operation mode of the multi-split air-conditioning system is the first set mode S1.

For example: under a first set working condition, namely when the environment temperature (namely the outdoor environment temperature or the outer ring temperature) > is higher than the upper limit b of the first set temperature range, the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range is judged, if the user set value is judged to be larger than the upper limit M of the second set temperature range, if the target temperature is larger than the upper limit M of the second set temperature range, the operation mode of the multi-split system is determined to be the first set mode, namely the operation mode of the multi-split system is determined to be the first set mode S1, and the operation process capable of executing the first set mode S1 is carried out.

In step S330, if the target temperature is greater than the lower limit of the second set temperature range and less than or equal to the upper limit of the second set temperature range under the first set condition, that is, if the target temperature is greater than the lower limit N of the second set temperature range and less than or equal to the upper limit M of the second set temperature range as the user set value, it is determined that the operation mode of the multi-split system is the second set mode, that is, it is determined that the operation mode of the multi-split system is the second set mode S2.

For example: under a first set condition, namely when the environment temperature (namely the outdoor environment temperature or the outer ring temperature) > is higher than the upper limit b of the first set temperature range, the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range is determined, if the user set value is determined to be greater than the lower limit N of the second set temperature range and less than or equal to the upper limit M of the second set temperature range, if the target temperature is greater than the lower limit N of the second set temperature range and less than or equal to the upper limit M of the second set temperature range, the operation mode of the multi-split system is determined to be the second set mode, namely the operation mode of the multi-split system is determined to be the second set mode S2, and the operation process capable of executing the second set mode S2 is performed.

In step S340, if the target temperature is less than or equal to the lower limit of the second set temperature range under the first set condition, that is, the target temperature is less than or equal to the lower limit N of the second set temperature range if the user setting value is less than or equal to the lower limit N of the second set temperature range, it is determined that the operation mode of the multi-split air-conditioning system is the third set mode, that is, it is determined that the operation mode of the multi-split air-conditioning system is the third set mode S3.

For example: under a first set condition, namely when the environment temperature (namely the outdoor environment temperature or the outer ring temperature) > is higher than the upper limit b of the first set temperature range, determining the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range, for example, determining whether the user set value is less than or equal to the lower limit N of the second set temperature range, if the target temperature is less than or equal to the lower limit N of the second set temperature range, determining the operation mode of the multi-split air system to be a third set mode, namely determining the operation mode of the multi-split air system to be the third set mode S3, and performing an operation process capable of executing the third set mode S3.

Second determination case: determining an operation mode of the multi-split system may include: and determining a second process of the operation mode of the multi-split system under a second set working condition.

The following further describes, with reference to a flowchart of an embodiment of determining the operation mode of the multi-split air-conditioning system under the second set operating condition in the method shown in fig. 4, a specific process of determining the operation mode of the multi-split air-conditioning system under the second set operating condition, which may include: step S410 to step S440.

And step S410, under a second set working condition, determining the relation between the acquired target temperature and the upper limit and the lower limit of a second set temperature range. The second set temperature range may be a set temperature range between the third temperature N and the fourth temperature M. The lower limit of the second set temperature range may be the third temperature N, and the upper limit of the second set temperature range may be the fourth temperature M. The lower limit N of the second set temperature range is less than the upper limit M of the second set temperature range.

For example: under a second set working condition, namely when the lower limit a of the first set temperature range is less than or equal to the environment temperature (namely the outdoor environment temperature or the outer ring temperature) and less than or equal to the upper limit b of the first set temperature range, the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range is determined.

In step S420, if the target temperature is greater than the upper limit of the second set temperature range under the second set condition, that is, if the target temperature is greater than the upper limit M of the second set temperature range if the user setting value is greater than the upper limit M of the second set temperature range, it is determined that the operation mode of the multi-split air-conditioning system is the fourth set mode, that is, it is determined that the operation mode of the multi-split air-conditioning system is the fourth set mode S4.

For example: under a second set condition, namely when the lower limit a of the first set temperature range is less than or equal to the environmental temperature (namely, the outdoor environmental temperature or the outer ring temperature) and less than or equal to the upper limit b of the first set temperature range, determining the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range, if the user set value is determined to be greater than the upper limit M of the second set temperature range, if the target temperature is determined to be greater than the upper limit M of the second set temperature range, determining the operation mode of the multi-split air-line system to be a fourth set mode S4, namely, when the upper limit M of the second set temperature range is less than the user set value, executing a fourth set mode S4, and further executing the operation process of the fourth set mode S4.

In step S430, if the target temperature is greater than the lower limit of the second set temperature range and less than or equal to the upper limit of the second set temperature range under the second set condition, that is, if the target temperature is greater than the lower limit N of the second set temperature range and less than or equal to the upper limit M of the second set temperature range as the user set value, it is determined that the operation mode of the multi-split air-conditioning system is the third set mode, that is, it is determined that the operation mode of the multi-split air-conditioning system is the third set mode S3.

For example: under a second set working condition, namely when the lower limit a of the first set temperature range is less than or equal to the environment temperature (namely, the outdoor environment temperature or the outer ring temperature) and less than or equal to the upper limit b of the first set temperature range, judging the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range, if the user set value is greater than the lower limit N of the second set temperature range and less than or equal to the upper limit M of the second set temperature range, if the target temperature is greater than the lower limit N of the second set temperature range and less than or equal to the upper limit M of the second set temperature range, determining the operation mode of the multi-split air-conditioning system as a third set mode S3, namely when the lower limit N of the second set temperature range is less than or equal to the upper limit M of the second set temperature range, the third setting mode S3 is performed, and thus the operation process of the third setting mode S3 may be performed.

In step S440, if the target temperature is less than or equal to the lower limit of the second set temperature range under the second set condition, that is, the target temperature is less than or equal to the lower limit N of the second set temperature range if the user setting value, the operation mode of the multi-split air-fuel ratio system is determined to be the second set mode, that is, the operation mode of the multi-split air-fuel ratio system is determined to be the second set mode S2.

For example: under a second set working condition, namely when the lower limit a of the first set temperature range is less than or equal to the environment temperature (namely, the outdoor environment temperature or the outer ring temperature) and less than or equal to the upper limit b of the first set temperature range, judging the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range, for example, judging whether the user set value is less than or equal to the lower limit N of the second set temperature range, if the target temperature is less than or equal to the lower limit N of the second set temperature range, determining the operation mode of the multi-split air-conditioning system as the second set mode S2, namely, when the user set value is less than or equal to the lower limit N of the second set temperature range, executing the second set mode S2, and further executing the operation process of the second set mode S2.

The third determination scenario: determining an operation mode of the multi-split system may include: and determining the third process of the running mode of the multi-split system under the third set working condition.

The following further describes, with reference to a flowchart of an embodiment of determining the operation mode of the multi-split air-conditioning system under a third set operating condition in the method shown in fig. 5, a specific process of determining the operation mode of the multi-split air-conditioning system under the third set operating condition, which may include: step S510 to step S540.

And step S510, under a third set working condition, determining the relation between the acquired target temperature and the upper limit and the lower limit of the second set temperature range. The second set temperature range may be a set temperature range between the third temperature N and the fourth temperature M. The lower limit of the second set temperature range may be the third temperature N, and the upper limit of the second set temperature range may be the fourth temperature M. The lower limit N of the second set temperature range is less than the upper limit M of the second set temperature range.

For example: under a third set working condition, namely when the ambient temperature (namely the outdoor ambient temperature or the outer ring temperature) is less than or equal to the lower limit a of the first set temperature range, the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range is determined.

In step S520, if the target temperature is greater than the upper limit of the second set temperature range under the third set condition, that is, if the target temperature is greater than the upper limit M of the second set temperature range as the user setting value, it is determined that the operation mode of the multi-split air-conditioning system is the fifth set mode, that is, it is determined that the operation mode of the multi-split air-conditioning system is the fifth set mode S5.

For example: under a third set working condition, namely when the ambient temperature (namely the outdoor ambient temperature or the outer ring temperature) is less than or equal to the lower limit a of the first set temperature range, judging the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range, if the user set value is judged to be less than or equal to the lower limit N of the second set temperature range, if the target temperature such as the user set value is greater than the upper limit M of the second set temperature range, determining the operation mode of the multi-split air-conditioning system to be a fifth set mode S5, namely, when the upper limit M of the second set temperature range is less than the user set value, executing the fifth set mode S5, and executing the operation process capable of executing the fifth set mode S5.

In step S530, if the target temperature is greater than the lower limit of the second set temperature range and less than or equal to the upper limit of the second set temperature range under the third set condition, that is, if the target temperature is greater than the lower limit N of the second set temperature range and less than or equal to the upper limit M of the second set temperature range as the user set value, it is determined that the operation mode of the multi-split system is the fourth set mode, that is, it is determined that the operation mode of the multi-split system is the fourth set mode S4.

For example: under a third set condition, namely when the environment temperature (namely the outdoor environment temperature or the outer ring temperature) is less than or equal to the lower limit a of the first set temperature range, judging the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range, if the user set value is greater than the lower limit N of the second set temperature range and less than or equal to the upper limit M of the second set temperature range, if the target temperature is greater than the lower limit N of the second set temperature range and less than or equal to the upper limit M of the second set temperature range, determining the operation mode of the multi-split air system as a fourth set mode S4, namely executing the fourth set mode S4 when the lower limit N of the second set temperature range is less than or equal to the upper limit M of the second set temperature range, an operation process in which the fourth setting mode S4 can be executed is performed.

In step S540, if the target temperature is less than or equal to the lower limit of the second set temperature range under the third set condition, that is, the target temperature is less than or equal to the lower limit N of the second set temperature range if the user setting value is less than or equal to the lower limit N of the second set temperature range, it is determined that the operation mode of the multi-split air-conditioning system is the third set mode, that is, it is determined that the operation mode of the multi-split air-conditioning system is the third set mode S3.

For example: under a third set working condition, namely when the ambient temperature (namely the outdoor ambient temperature or the outer ring temperature) is less than or equal to the lower limit a of the first set temperature range, judging the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range, for example, judging whether the user set value is greater than the upper limit M of the second set temperature range, if the target temperature is less than or equal to the lower limit N of the second set temperature range, determining the operation mode of the multi-split air system as a third set mode S3, namely, when the user set value is less than or equal to the lower limit N of the second set temperature range, executing the third set mode S3, and executing the operation process capable of executing the third set mode S3.

Therefore, the operation mode of the multi-split system is determined according to the acquired target temperature under the determined operation conditions such as the first set operation condition, the second set operation condition and the third set operation condition, and the appropriate operation mode can be determined according to different operation conditions, so that the user can properly save energy and improve the user experience on the premise of improving the comfort feeling of the user under different operation conditions.

In step S140, in the determined operation mode, the operation process of the multi-split air conditioning system is controlled according to the acquired indoor ambient temperature.

The multi-split system with the cascade circulation system is a super high temperature cascade central multi-split system. The ultrahigh-temperature cascade type central multi-split system realizes bidirectional control by monitoring different environmental temperatures and user requirements by utilizing the operation mode of a cascade type double system (such as a cascade type double system consisting of a high-temperature-level circulating system and a low-temperature-level circulating system) applied to a water multi-split product, can at least solve the problem that the heat supply load of a low-temperature area cannot meet the user requirements, and can at least effectively relieve the problem of insufficient high-temperature heat source of the multi-split system in part of cold areas, thereby achieving the purpose of taking comfort and energy conservation into consideration.

Therefore, the multi-split air conditioner system is controlled to operate according to the determined operation mode under the determined operation working condition and in combination with the actual requirement of the indoor environment temperature according to the outdoor environment temperature, the target temperature and the indoor environment temperature of the multi-split air conditioner system, the multi-split air conditioner system can be operated by taking the user comfort as the purpose and taking the energy conservation property into consideration, and the load supply control thought taking the environment temperature and the user load requirement as the judgment basis is adopted, the problems of energy conservation and discomfort caused by unreasonable control under high load output are changed from the control strategy, at least, the problem that the multi-split air conditioner system cannot meet the comfort requirement of users under different environments can be solved, and the problem that the heat supply load of a low-temperature area cannot meet the user requirement can be solved at least, so that the comfort feeling of the users under different environments is.

Optionally, in the step S140, in the determined operation mode, controlling an operation process of the multi-split system according to the acquired indoor ambient temperature may include: the following control situations, such as multiple control situations for controlling the operation process of the multi-split air-conditioning system in the first setting mode, the second setting mode, the third setting mode, the fourth setting mode and the fifth setting mode, may be specifically referred to the following exemplary description.

The first control scenario: and the first control process is used for controlling the operation process of the multi-split air conditioning system in the first setting mode.

Referring to fig. 6, a flowchart of an embodiment of a method for controlling an operation process of a multi-split system in a first setting mode according to the present invention is further described, where the specific process for controlling the operation process of the multi-split system in the first setting mode includes: step S610 to step S640.

Step S610, in the first setting mode, controlling a first compressor of a first temperature-level circulation system in the multi-split system to be turned off, controlling a second compressor of a second temperature-level circulation system in the multi-split system to be turned on, and controlling an auxiliary electric heating system in the multi-split system to be turned off. Wherein the first compressor of the first temperature stage circulating system, such as the low temperature compressor of the low temperature stage circulating system. And a second compressor of a second temperature stage circulating system in the multi-split system, such as a high temperature compressor of a high temperature stage circulating system. And an auxiliary electric heating system in the multi-split system, such as an auxiliary electric heater of the multi-split system.

For example: in the first setting mode S1, the high-temperature stage compressor is activated, the low-temperature compressor is deactivated, and the auxiliary electric heating is turned off. Namely, the action branch of the high-temperature stage compressor is opened, and the action branch of the low-temperature stage compressor and the auxiliary electric heating branch are closed.

In step S620, it is determined whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a first set temperature in the first setting mode. Wherein the first set temperature, i.e. the first set temperature T1 ℃.

For example: in the first setting mode S1, the high-temperature stage compressor is activated, the low-temperature compressor is deactivated, and the auxiliary electric heating is turned off. The value of the inner ring temperature (i.e., the indoor environment temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner ring temperature and the first set temperature is determined, for example, whether the temperature difference between the user-set temperature and the inner ring temperature is greater than or equal to the first set temperature T1 ℃.

In step S630, if the temperature difference between the target temperature and the indoor ambient temperature is greater than or equal to the first set temperature in the first set mode, the indoor ambient temperature of the multi-split air-conditioning system continues to be acquired, so as to continue to determine whether the acquired temperature difference between the target temperature and the indoor ambient temperature is greater than or equal to the first set temperature.

For example: in the first setting mode S1, the high-temperature stage compressor is activated, the low-temperature compressor is deactivated, and the auxiliary electric heating is turned off. The value of the inner ring temperature (i.e., the indoor environment temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner ring temperature and the first set temperature is determined, for example, whether the temperature difference between the user-set temperature and the inner ring temperature is greater than or equal to the first set temperature T1 ℃. And when the user set value, namely the inner ring temperature is more than or equal to the first set temperature T1 ℃, returning to continuously detect the inner ring temperature.

Step S640, if the temperature difference between the target temperature and the indoor ambient temperature is less than the first set temperature in the first set mode, controlling the operating frequency of the second compressor to decrease the first set frequency to the first operating frequency, and controlling the second compressor to operate according to the first operating frequency until the temperature difference between the target temperature and the indoor ambient temperature is equal to a negative value of the first set temperature, and controlling the second compressor to operate according to the set first lowest frequency.

For example: in the first setting mode S1, the high-temperature stage compressor is activated, the low-temperature compressor is deactivated, and the auxiliary electric heating is turned off. The value of the inner ring temperature (i.e., the indoor environment temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner ring temperature and the first set temperature is determined, for example, whether the temperature difference between the user-set temperature and the inner ring temperature is greater than or equal to the first set temperature T1 ℃. And if the user set value-inner ring temperature is less than the first set temperature T1 ℃, controlling the high-temperature compressor to operate in a frequency reduction mode, such as controlling the frequency of the high-temperature stage compressor-the first set frequency P1, and controlling the compressor to operate in the frequency after frequency reduction until the user set value-inner ring temperature is equal to the first set temperature T1 ℃, and then controlling the high-temperature stage compressor to operate in the set lowest frequency.

The second control scenario: and a second control process for controlling the operation process of the multi-split air-conditioning system in a second setting mode.

Referring to fig. 7, a flowchart of an embodiment of a method for controlling an operation process of a multi-split system in a second setting mode according to the present invention is further described, where the specific process for controlling the operation process of the multi-split system in the second setting mode includes: step S710 to step S740.

Step S710, in a second setting mode, controlling a first compressor of a first temperature-level circulation system in the multi-split system to be turned off, controlling a second compressor of a second temperature-level circulation system in the multi-split system to be turned on, and controlling an auxiliary electric heating system in the multi-split system to be turned off. Wherein the first compressor of the first temperature stage circulating system, such as the low temperature compressor of the low temperature stage circulating system. And a second compressor of a second temperature stage circulating system in the multi-split system, such as a high temperature compressor of a high temperature stage circulating system. And an auxiliary electric heating system in the multi-split system, such as an auxiliary electric heater of the multi-split system.

For example: in the second setting mode S2, the high-temperature stage compressor is activated, the low-temperature compressor is deactivated, and the auxiliary electric heating is turned off. Namely, the action branch of the high-temperature stage compressor is opened, and the action branch of the low-temperature stage compressor and the auxiliary electric heating branch are closed.

In step S720, it is determined whether the temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a second set temperature in the second setting mode. Wherein the second set temperature, i.e. the second set temperature T2 ℃.

For example: in the second setting mode S2, the high-temperature stage compressor is activated, the low-temperature compressor is deactivated, and the auxiliary electric heating is turned off. The value of the inner ring temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user set temperature and the inner ring temperature and the second set temperature T2 ℃ is determined, such as whether the temperature difference between the user set temperature and the inner ring temperature is greater than or equal to the second set temperature T2 ℃.

In step S730, if the temperature difference between the target temperature and the indoor ambient temperature in the second setting mode is greater than or equal to the second setting temperature, the indoor ambient temperature of the multi-split air-conditioning system is continuously acquired, so as to continuously determine whether the acquired temperature difference between the target temperature and the indoor ambient temperature is greater than or equal to the second setting temperature.

For example: in the second setting mode S2, the high-temperature stage compressor is activated, the low-temperature compressor is deactivated, and the auxiliary electric heating is turned off. The value of the inner ring temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user set temperature and the inner ring temperature and the second set temperature T2 ℃ is determined, such as whether the temperature difference between the user set temperature and the inner ring temperature is greater than or equal to the second set temperature T2 ℃. And when the user set value, namely the inner ring temperature is more than or equal to the second set temperature T2 ℃, returning to continuously detect the inner ring temperature.

Step S740, if the temperature difference between the target temperature and the indoor ambient temperature is less than the second set temperature in the second set mode, controlling the operating frequency of the second compressor to decrease the second set frequency to the second operating frequency, and controlling the second compressor to operate at the second operating frequency until the temperature difference between the target temperature and the indoor ambient temperature is equal to a negative value of the second set temperature, and controlling the second compressor to operate at the set second lowest frequency.

For example: in the second setting mode S2, the high-temperature stage compressor is activated, the low-temperature compressor is deactivated, and the auxiliary electric heating is turned off. The value of the inner ring temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user set temperature and the inner ring temperature and the second set temperature T2 ℃ is determined, such as whether the temperature difference between the user set temperature and the inner ring temperature is greater than or equal to the second set temperature T2 ℃. And if the user set value-inner ring temperature is less than the second set temperature T2 ℃, controlling the high-temperature compressor to operate in a frequency reduction mode, such as controlling the frequency of the high-temperature stage compressor-the second set frequency P2, and controlling the compressor to operate in the frequency after frequency reduction until the user set value-inner ring temperature is equal to the second set temperature T2 ℃, and then controlling the high-temperature stage compressor to operate in the set lowest frequency.

The third control scenario: and a third control process for controlling the operation process of the multi-split air-conditioning system in a third setting mode.

Referring to fig. 8, a flowchart of an embodiment of a method for controlling an operation process of a multi-split system in a third setting mode according to the present invention is further described, where the specific process for controlling the operation process of the multi-split system in the third setting mode includes: step S810 to step S850.

Step S810, in a third setting mode, controlling a first compressor of a first temperature-stage circulation system in the multi-split system to be turned off, controlling a second compressor of a second temperature-stage circulation system in the multi-split system to be turned on, and controlling an auxiliary electric heating system in the multi-split system to be turned on. Wherein the first compressor of the first temperature stage circulating system, such as the low temperature compressor of the low temperature stage circulating system. And a second compressor of a second temperature stage circulating system in the multi-split system, such as a high temperature compressor of a high temperature stage circulating system. And an auxiliary electric heating system in the multi-split system, such as an auxiliary electric heater of the multi-split system.

For example: in the third setting mode S3, the high-temperature stage compressor is activated, the low-temperature compressor is prohibited from being turned on, and the auxiliary electric heating is turned on. Namely, the action branch of the high-temperature stage compressor is opened, the action branch of the low-temperature stage compressor is closed, and the auxiliary electric heating branch is opened.

In the third setting mode, it is determined whether the temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a third setting value, and it is determined whether the temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a third setting temperature S820. Wherein the third set point, i.e. the third set point Q3 ℃. A third set temperature, T3 deg.c.

For example: in the third setting mode S3, the high-temperature stage compressor is activated, the low-temperature compressor is prohibited from being turned on, and the auxiliary electric heating is turned on. Namely, the action branch of the high-temperature stage compressor is opened, the action branch of the low-temperature stage compressor is closed, and the auxiliary electric heating branch is opened. The value of the inner ring temperature (i.e., the indoor environment temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner ring temperature and the third set temperature is determined, such as whether the temperature difference between the user-set temperature and the inner ring temperature is equal to the third set value Q3 ℃ or whether the temperature difference between the user-set temperature and the inner ring temperature is greater than or equal to the third set temperature T3 ℃.

In step S830, if the temperature difference between the target temperature and the indoor ambient temperature in the third setting mode is equal to a third setting value, the auxiliary electric heating system is controlled to be turned off.

For example: in the third setting mode S3, the high-temperature stage compressor is activated, the low-temperature compressor is prohibited from being turned on, and the auxiliary electric heating is turned on. Namely, the action branch of the high-temperature stage compressor is opened, the action branch of the low-temperature stage compressor is closed, and the auxiliary electric heating branch is opened. And detecting the value of the inner ring temperature (namely the indoor environment temperature) in real time, and judging the relationship between the temperature difference between the user set temperature and the inner ring temperature and a third set temperature, if the temperature difference between the user set temperature and the inner ring temperature is judged to be equal to the third set value Q3 ℃, controlling the auxiliary electric heating to be turned off when the user set value-the inner ring temperature is equal to the third set value Q3 ℃.

In step S840, if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the third setting temperature in the third setting mode, the indoor environment temperature of the multi-split air-conditioning system is continuously obtained to continuously determine whether the temperature difference between the obtained target temperature and the indoor environment temperature is greater than or equal to the third setting temperature.

For example: in the third setting mode S3, the high-temperature stage compressor is activated, the low-temperature compressor is prohibited from being turned on, and the auxiliary electric heating is turned on. Namely, the action branch of the high-temperature stage compressor is opened, the action branch of the low-temperature stage compressor is closed, and the auxiliary electric heating branch is opened. The value of the inner ring temperature (i.e., the indoor environment temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner ring temperature and the third set temperature, such as whether the temperature difference between the user-set temperature and the inner ring temperature is greater than or equal to the third set temperature T3 ℃, is determined. And if the user set value, namely the inner ring temperature is greater than or equal to the third set temperature T3 ℃, returning to continuously detect the inner ring temperature.

Step S850, if the temperature difference between the target temperature and the indoor ambient temperature is less than the third set temperature in the third set mode, controlling the operating frequency of the second compressor to decrease the third set frequency to the third operating frequency, and controlling the second compressor to operate at the third operating frequency until the temperature difference between the target temperature and the indoor ambient temperature is equal to a negative value of the third set temperature, and controlling the second compressor to operate at a set third lowest frequency.

For example: in the third setting mode S3, the high-temperature stage compressor is activated, the low-temperature compressor is prohibited from being turned on, and the auxiliary electric heating is turned on. Namely, the action branch of the high-temperature stage compressor is opened, the action branch of the low-temperature stage compressor is closed, and the auxiliary electric heating branch is opened. The value of the inner ring temperature (i.e., the indoor environment temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner ring temperature and the third set temperature, such as whether the temperature difference between the user-set temperature and the inner ring temperature is greater than or equal to the third set temperature T3 ℃, is determined. And if the user set value-inner ring temperature is less than the third set temperature T3 ℃, controlling the high-temperature compressor to operate in a frequency reduction mode, such as controlling the frequency of the high-temperature stage compressor-the third set frequency P3, and controlling the compressor to operate in the frequency after frequency reduction until the user set value-inner ring temperature is equal to the third set temperature T3 ℃, and then controlling the high-temperature stage compressor to operate in the set lowest frequency.

The fourth control scenario: and a fourth control process of controlling the operation process of the multi-split air conditioning system in a fourth setting mode.

Referring to fig. 9, a flowchart of an embodiment of a method for controlling an operation process of a multi-split system in a fourth setting mode according to the present invention is further described, where the specific process for controlling the operation process of the multi-split system in the fourth setting mode includes: step S910 to step S950.

Step S910, in a fourth setting mode, controlling a first compressor of a first temperature-level circulation system in the multi-split system to start, controlling a second compressor of a second temperature-level circulation system in the multi-split system to start, and controlling an auxiliary electric heating system in the multi-split system to start. Wherein the first compressor of the first temperature stage circulating system, such as the low temperature compressor of the low temperature stage circulating system. And a second compressor of a second temperature stage circulating system in the multi-split system, such as a high temperature compressor of a high temperature stage circulating system. And an auxiliary electric heating system in the multi-split system, such as an auxiliary electric heater of the multi-split system.

For example: in the fourth setting mode S4, the high-temperature stage compressor operates, the low-temperature stage compressor operates, and the auxiliary electric heating is turned on. Namely, the low-temperature stage compressor action branch, the high-temperature stage compressor action branch and the auxiliary electric heating branch are simultaneously opened.

In the fourth setting mode, it is determined whether the temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a fourth setting value, and it is determined whether the temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a fourth setting temperature in step S920. Wherein the fourth setting, i.e. the fourth setting Q4 ℃. A fourth set temperature, i.e. a fourth set temperature T4 deg.c.

For example: in the fourth setting mode S4, the high-temperature stage compressor operates, the low-temperature stage compressor operates, and the auxiliary electric heating is turned on. The value of the inner ring temperature (i.e., the indoor environment temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner ring temperature and the fourth set temperature T4 ℃ is determined, for example, whether the temperature difference between the user-set temperature and the inner ring temperature is equal to the fourth set value Q4 ℃ is determined, and whether the temperature difference between the user-set temperature and the inner ring temperature is greater than or equal to the fourth set temperature T4 ℃ is determined.

In step S930, if the temperature difference between the target temperature and the indoor ambient temperature is equal to a fourth set value in the fourth set mode, the auxiliary electric heating system is controlled to be turned off, and the first compressor is controlled to operate at a set fourth natural frequency until the temperature difference between the target temperature and the indoor ambient temperature is equal to a negative value of the fourth set temperature, and the first compressor is controlled to stop.

For example: in the fourth setting mode S4, the high-temperature stage compressor operates, the low-temperature stage compressor operates, and the auxiliary electric heating is turned on. The value of the inner ring temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user set temperature and the inner ring temperature and the fourth set temperature T4 deg.c is determined, for example, whether the temperature difference between the user set temperature and the inner ring temperature is equal to the fourth set value Q4 deg.c is determined. When the user set value, namely the inner ring temperature, is equal to a fourth set value Q4 ℃, the auxiliary electric heating is controlled to be turned off, and the compressor is controlled to operate at the natural frequency. After the compressor is controlled to run at the natural frequency until the user set value, namely the inner ring temperature, is equal to the fourth set temperature T4 ℃, the low-temperature stage compressor is controlled to stop. For example: and controlling the high-low temperature stage compressor to stop simultaneously, namely, the high-low temperature stage compressor reaches a stop state when the operation of the high-low temperature stage compressor reaches a target control point.

In step S940, if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fourth setting temperature in the fourth setting mode, the indoor environment temperature of the multi-split air-conditioning system is continuously acquired to continuously determine whether the acquired temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fourth setting temperature.

For example: in the fourth setting mode S4, the high-temperature stage compressor operates, the low-temperature stage compressor operates, and the auxiliary electric heating is turned on. The value of the inner ring temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user set temperature and the inner ring temperature and the fourth set temperature T4 deg.c is determined, such as whether the temperature difference between the user set temperature and the inner ring temperature is greater than or equal to the fourth set temperature T4 deg.c. And if the user set value, namely the inner ring temperature is greater than or equal to the fourth set temperature T4 ℃, returning to continuously detect the inner ring temperature.

Step S950, if the temperature difference between the target temperature and the indoor ambient temperature is less than the fourth set temperature in the fourth set mode, controlling the operating frequency of the second compressor to decrease the fourth set frequency to the fourth operating frequency, and controlling the second compressor to operate at the fourth operating frequency until the temperature difference between the target temperature and the indoor ambient temperature is equal to a negative value of the fourth set temperature, and controlling the second compressor to operate at the set fourth lowest frequency.

For example: in the fourth setting mode S4, the high-temperature stage compressor operates, the low-temperature stage compressor operates, and the auxiliary electric heating is turned on. The value of the inner ring temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user set temperature and the inner ring temperature and the fourth set temperature T4 deg.c is determined, such as whether the temperature difference between the user set temperature and the inner ring temperature is greater than or equal to the fourth set temperature T4 deg.c. And if the user set value-inner ring temperature is less than the fourth set temperature T4 ℃, controlling the high-temperature compressor to operate in a frequency reduction mode, such as controlling the frequency of the high-temperature-fourth set frequency P4, and controlling the compressor to operate in the frequency after frequency reduction until the user set value-inner ring temperature is equal to the fourth set temperature T4 ℃, and then controlling the high-temperature-stage compressor to operate in the set lowest frequency.

Fifth control scenario: and a fifth control process of controlling the operation process of the multi-split air conditioning system in a fifth setting mode.

In the method shown in fig. 10, the specific process of controlling the operation process of the multi-split air conditioning system in the fifth setting mode is further described below with reference to the operation process of the multi-split air conditioning system in the fifth setting mode, and the specific process may include: step S1010 to step S1050.

Step S1010, in a fifth setting mode, controlling a first compressor of a first temperature-level circulation system in the multi-split system to start, controlling a second compressor of a second temperature-level circulation system in the multi-split system to start, and controlling an auxiliary electric heating system in the multi-split system to start. Wherein the first compressor of the first temperature stage circulating system, such as the low temperature compressor of the low temperature stage circulating system. And a second compressor of a second temperature stage circulating system in the multi-split system, such as a high temperature compressor of a high temperature stage circulating system. And an auxiliary electric heating system in the multi-split system, such as an auxiliary electric heater of the multi-split system.

For example: in the fifth setting mode S5, the high-temperature stage compressor operates, the low-temperature stage compressor operates, and the auxiliary electric heating is turned on. Namely, the low-temperature stage compressor action branch, the high-temperature stage compressor action branch and the auxiliary electric heating branch are simultaneously opened.

In the fifth setting mode, it is determined whether the temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a fifth setting value, and it is determined whether the temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a fifth setting temperature S1020. Wherein the fifth set point, i.e. the fifth set point Q5 ℃. A fifth set temperature, namely a fifth set temperature T5 deg.c.

For example: in the fifth setting mode S5, the value of the inner loop temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner loop temperature and the fifth setting temperature T5 ℃ is determined, such as whether the temperature difference between the user-set temperature and the inner loop temperature is equal to the fifth setting Q5 ℃ or not, and whether the temperature difference between the user-set temperature and the inner loop temperature is greater than or equal to the fifth setting temperature T5 ℃.

And step S1030, if the temperature difference between the target temperature and the indoor ambient temperature is equal to a fifth set value in the fifth set mode, controlling the auxiliary electric heating system to be turned off, and controlling the first compressor to operate at a set fifth natural frequency until the temperature difference between the target temperature and the indoor ambient temperature is equal to a negative value of the fifth set temperature, and controlling the first compressor to stop.

For example: in the fifth setting mode S5, the value of the inner loop temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner loop temperature and the fifth set temperature T5 ℃ is determined, such as whether the temperature difference between the user-set temperature and the inner loop temperature is equal to the fifth set value Q5 ℃. When the user set value, namely the inner ring temperature, is equal to a fifth set value Q5 ℃, the auxiliary electric heating is controlled to be turned off, the compressor is controlled to operate at the natural frequency, and the high-low temperature stage compressor and the low-low temperature stage compressor are controlled to be stopped at the same time (namely, the low-temperature compressor and the high-temperature compressor are controlled to be stopped).

In step S1040, if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fifth setting temperature in the fifth setting mode, the indoor environment temperature of the multi-split air-conditioning system continues to be obtained, so as to continue to determine whether the temperature difference between the obtained target temperature and the indoor environment temperature is greater than or equal to the fifth setting temperature.

For example: in the fifth setting mode S5, the value of the inner loop temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner loop temperature and the fifth setting temperature T5 ℃ is determined, such as whether the temperature difference between the user-set temperature and the inner loop temperature is greater than or equal to the fifth setting temperature T5 ℃. And if the user set value, namely the inner ring temperature is greater than or equal to the fifth set temperature T5 ℃, returning to continuously detect the inner ring temperature.

Step 1050, if the temperature difference between the target temperature and the indoor ambient temperature is less than the fifth set temperature in the fifth set mode, controlling the operating frequency of the second compressor to decrease the fifth set frequency to the fifth operating frequency, and controlling the second compressor to operate at the fifth operating frequency until the temperature difference between the target temperature and the indoor ambient temperature is equal to a negative value of the fifth set temperature, and controlling the second compressor to operate at the set fifth lowest frequency.

For example: in the fifth setting mode S5, the value of the inner loop temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user-set temperature and the inner loop temperature and the fifth setting temperature T5 ℃ is determined, such as whether the temperature difference between the user-set temperature and the inner loop temperature is greater than or equal to the fifth setting temperature T5 ℃. And if the user set value-inner ring temperature is less than the fifth set temperature T5 ℃, controlling the high-temperature compressor to operate in a frequency reduction mode, such as controlling the frequency of the high-temperature-stage compressor to be the fifth set frequency P5, and controlling the compressor to operate in the frequency after frequency reduction until the user set value-inner ring temperature is equal to the fifth set temperature T5 ℃, and then controlling the high-temperature-stage compressor to operate in the set lowest frequency.

Therefore, the operation process of the multi-split air-conditioning system is controlled according to the control modes of different setting modes respectively according to the acquired indoor environment temperature and the target temperature under the determined operation modes such as the first setting mode, the second setting mode, the third setting mode, the fourth setting mode and the fifth setting mode, the operation process of the multi-split air-conditioning system can be controlled more accurately according to the different operation modes determined under different working conditions, the comfort feeling of a user under different indoor environment conditions under different working conditions is further improved, and the energy saving performance is also considered.

Through a large amount of experimental verifications, adopt the technical scheme of this embodiment, through monitoring different ambient temperature and user load demand, carry out two-way control according to ambient temperature and user load demand, promote user's comfortable impression, and compromise energy-conservation nature.

According to an embodiment of the present invention, there is also provided an operation control apparatus corresponding to the operation control method. Referring to fig. 11, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The operation control device may be applied to a multi-split system having a cascade circulation system, and may include: an acquisition unit 102, a determination unit 104, and a control unit 106.

In an optional example, the obtaining unit 102 may be configured to obtain an outdoor environment temperature, a target temperature, and an indoor environment temperature of the multi-split air-conditioning system, that is, obtain the outdoor environment temperature of the multi-split air-conditioning system, and obtain the target temperature and the indoor environment temperature of the multi-split air-conditioning system. The specific functions and processes of the acquiring unit 102 are referred to in step S110. Wherein, the outdoor ambient temperature is, for example, the temperature value detected by the ambient temperature sensing bulb. The target temperature, such as a temperature value set by the end user via the hand operator, i.e., a user set value. And indoor environment temperature, such as a temperature value detected by a return air temperature sensing bulb. The multi-split system is a cascade circulation system. The cascade circulation system may include: the system comprises a first temperature stage circulating system and a second temperature stage circulating system, wherein the operating temperature of the first temperature stage circulating system is lower than that of the second temperature stage circulating system.

In an alternative example, the determining unit 104 may be configured to determine an operating condition of the multi-split air conditioning system according to the acquired outdoor ambient temperature. The specific function and processing of the determination unit 104 are referred to in step S120. The operation conditions may include: the first set operating condition, the second set operating condition and/or the third set operating condition.

The operation control device according to claim 11, wherein the determining unit 104 determines the operation condition of the multi-split system according to the acquired outdoor environment temperature, and may include:

the determining unit 104 may be further specifically configured to determine a relationship between the acquired outdoor environment temperature and a lower limit of the first set temperature range and an upper limit of the first set temperature range. The specific function and processing of the determination unit 104 are also referred to in step S210. The first set temperature range may be a set temperature range between a first temperature a and a second temperature b. The lower limit of the first set temperature range may be a first temperature a, and the upper limit of the first set temperature range may be a second temperature b. The lower limit a of the first set temperature range is smaller than the upper limit b of the first set temperature range.

The determining unit 104 may be further specifically configured to determine, if the outdoor environment temperature is greater than an upper limit of the first set temperature range, that is, the outdoor environment temperature is greater than an upper limit b of the first set temperature range, that the operating condition of the multi-split air-conditioning system is the first set condition. The specific function and processing of the determination unit 104 are also referred to in step S220.

The determining unit 104 may be further specifically configured to determine the operating condition of the multi-split system as a second set condition if the outdoor environment temperature is greater than a lower limit of the first set temperature range and is less than or equal to an upper limit of the first set temperature range, that is, the outdoor environment temperature is greater than a lower limit a of the first set temperature range and is less than or equal to an upper limit b of the first set temperature range. The specific function and processing of the determination unit 104 are also referred to in step S230.

The determining unit 104 may be further configured to determine, if the outdoor environment temperature is less than or equal to a lower limit of the first set temperature range, that is, the outdoor environment temperature is less than or equal to a lower limit a of the first set temperature range, that is, the operating condition of the multi-split air-fuel system is a third set condition. The specific function and processing of the determination unit 104 are also referred to in step S240.

In an optional example, the determining unit 104 may be further configured to determine an operation mode of the multi-split system according to the acquired target temperature under the determined operation condition. The specific function and processing of the determination unit 104 are also referred to in step S130. The operation modes can include: a first setting mode, a second setting mode, a third setting mode, a fourth setting mode, and/or a fifth setting mode. For example: the first setting mode is the mode S1, the second setting mode is the mode S2, the third setting mode is the mode S3, the fourth setting mode is the mode S4, and the fifth setting mode is the mode S5.

Optionally, the determining unit 104 determines the operation mode of the multi-split system according to the acquired target temperature under the determined operation condition, and may include: the following determination conditions, namely the determination conditions for determining the operation mode of the multi-split air-conditioning system under the first set operating condition, the second set operating condition and the third set operating condition respectively, can be specifically referred to the following exemplary description.

The determining unit 104 may be further specifically configured to determine, under the first set operating condition, a relationship between the acquired target temperature and an upper limit and a lower limit of the second set temperature range. The specific function and processing of the determination unit 104 are also referred to in step S310. The second set temperature range may be a set temperature range between the third temperature N and the fourth temperature M. The lower limit of the second set temperature range may be the third temperature N, and the upper limit of the second set temperature range may be the fourth temperature M. The lower limit N of the second set temperature range is less than the upper limit M of the second set temperature range.

The determining unit 104 may be further specifically configured to determine that the operation mode of the multi-split air-fuel ratio system is the first setting mode, that is, the operation mode of the multi-split air-fuel ratio system is the first setting mode S1, if the target temperature is greater than the upper limit of the second setting temperature range under the first setting condition, that is, if the target temperature is greater than the upper limit M of the second setting temperature range, for example, the user setting value. The specific function and processing of the determination unit 104 are also referred to in step S320.

The determining unit 104 may be further specifically configured to determine the operation mode of the multi-split system as the second setting mode, that is, determine the operation mode of the multi-split system as the second setting mode S2, if the target temperature is greater than the lower limit of the second setting temperature range and is less than or equal to the upper limit of the second setting temperature range under the first setting condition, that is, if the target temperature is greater than the lower limit N of the second setting temperature range and is less than or equal to the upper limit M of the second setting temperature range, for example, the user setting value. The specific function and processing of the determination unit 104 are also referred to in step S330.

The determining unit 104 may be further configured to determine that the operation mode of the multi-split air-fuel ratio system is the third setting mode, that is, the operation mode of the multi-split air-fuel ratio system is the third setting mode S3, if the target temperature is less than or equal to the lower limit of the second setting temperature range under the first setting condition, that is, the target temperature is less than or equal to the lower limit N of the second setting temperature range, for example, a user setting value. The specific function and processing of the determination unit 104 are also referred to in step S340.

The determining unit 104 may be further specifically configured to determine, under the second set operating condition, a relationship between the acquired target temperature and an upper limit and a lower limit of the second set temperature range. The specific function and processing of the determination unit 104 are also referred to in step S410. The second set temperature range may be a set temperature range between the third temperature N and the fourth temperature M. The lower limit of the second set temperature range may be the third temperature N, and the upper limit of the second set temperature range may be the fourth temperature M. The lower limit N of the second set temperature range is less than the upper limit M of the second set temperature range.

The determining unit 104 may be further specifically configured to determine that the operation mode of the multi-split air-fuel ratio system is the fourth setting mode, that is, the operation mode of the multi-split air-fuel ratio system is the fourth setting mode S4, if the target temperature is greater than the upper limit of the second setting temperature range under the second setting condition, that is, if the target temperature is greater than the upper limit M of the second setting temperature range, for example, the user setting value. The specific function and processing of the determination unit 104 are also referred to step S420.

The determining unit 104 may be further specifically configured to determine that the operation mode of the multi-split system is the third setting mode, that is, the operation mode of the multi-split system is determined to be the third setting mode S3, if the target temperature is greater than the lower limit of the second setting temperature range and is less than or equal to the upper limit of the second setting temperature range under the second setting condition, that is, the target temperature is greater than the lower limit N of the second setting temperature range and is less than or equal to the upper limit M of the second setting temperature range, for example, the user setting value is greater than the lower limit N of the second setting temperature range and is. The specific function and processing of the determination unit 104 are also referred to in step S430.

The determining unit 104 may be further configured to determine that the operation mode of the multi-split air-fuel ratio system is the second setting mode, that is, the operation mode of the multi-split air-fuel ratio system is the second setting mode S2, if the target temperature is less than or equal to the lower limit of the second setting temperature range under the second setting condition, that is, the target temperature is less than or equal to the lower limit N of the second setting temperature range, for example, the user setting value. The specific function and processing of the determination unit 104 are also referred to in step S440.

The determining unit 104 may be further specifically configured to determine, under the third set operating condition, a relationship between the acquired target temperature and an upper limit of the second set temperature range and a lower limit of the second set temperature range. The specific function and processing of the determination unit 104 are also referred to in step S510. The second set temperature range may be a set temperature range between the third temperature N and the fourth temperature M. The lower limit of the second set temperature range may be the third temperature N, and the upper limit of the second set temperature range may be the fourth temperature M. The lower limit N of the second set temperature range is less than the upper limit M of the second set temperature range.

The determining unit 104 may be further specifically configured to determine that the operation mode of the multi-split air-fuel ratio system is the fifth setting mode, that is, the operation mode of the multi-split air-fuel ratio system is the fifth setting mode S5, if the target temperature is greater than the upper limit of the second setting temperature range under the third setting condition, that is, if the target temperature is greater than the upper limit M of the second setting temperature range, for example, the user setting value. The specific function and processing of the determination unit 104 are also referred to in step S520.

The determining unit 104 may be further specifically configured to determine that the operation mode of the multi-split system is the fourth setting mode, that is, the operation mode of the multi-split system is determined to be the fourth setting mode S4, if the target temperature is greater than the lower limit of the second setting temperature range and is less than or equal to the upper limit of the second setting temperature range under the third setting condition, that is, the target temperature is greater than the lower limit N of the second setting temperature range and is less than or equal to the upper limit M of the second setting temperature range, for example, the user setting value is greater than the lower limit N of the second setting temperature range and is less. The specific function and processing of the determination unit 104 are also referred to in step S530.

The determining unit 104 may be further specifically configured to determine that the operation mode of the multi-split air-fuel ratio system is the third setting mode, that is, the operation mode of the multi-split air-fuel ratio system is the third setting mode S3, if the target temperature is less than or equal to the lower limit of the second setting temperature range under the third setting condition, that is, the target temperature is less than or equal to the lower limit N of the second setting temperature range, for example, the user setting value. The specific function and processing of the determination unit 104 are also referred to in step S540.

In an alternative example, the control unit 106 may be configured to control an operation process of the multi-split air conditioning system according to the acquired indoor ambient temperature in the determined operation mode. The specific function and processing of the control unit 106 are shown in step S140.

Optionally, the controlling unit 106 controls an operation process of the multi-split system according to the acquired indoor ambient temperature in the determined operation mode, and may include: the following control situations, such as multiple control situations for controlling the operation process of the multi-split air-conditioning system in the first setting mode, the second setting mode, the third setting mode, the fourth setting mode and the fifth setting mode, may be specifically referred to the following exemplary description.

The control unit 106 may be further configured to, in the first setting mode, control a first compressor of a first temperature-stage circulation system in the multi-split air conditioning system to be turned off, control a second compressor of a second temperature-stage circulation system in the multi-split air conditioning system to be turned on, and control an auxiliary electric heating system in the multi-split air conditioning system to be turned off. The specific functions and processes of the control unit 104 are also referred to in step S610. Wherein the first compressor of the first temperature stage circulating system, such as the low temperature compressor of the low temperature stage circulating system. And a second compressor of a second temperature stage circulating system in the multi-split system, such as a high temperature compressor of a high temperature stage circulating system. And an auxiliary electric heating system in the multi-split system, such as an auxiliary electric heater of the multi-split system.

The control unit 106 may be further configured to determine whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a first set temperature in the first setting mode. The specific functions and processes of the control unit 104 are also referred to in step S620. Wherein the first set temperature, i.e. the first set temperature T1 ℃.

The control unit 106 may be further configured to, if the temperature difference between the target temperature and the indoor environment temperature in the first setting mode is greater than or equal to the first setting temperature, continue to acquire the indoor environment temperature of the multi-split air-conditioning system, so as to continue to determine whether the acquired temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the first setting temperature. The specific function and processing of the control unit 104 are also referred to in step S630.

The control unit 106 may be further configured to control the operating frequency of the second compressor to decrease the first set frequency to the first operating frequency if the temperature difference between the target temperature and the indoor environment temperature is less than the first set temperature in the first set mode, and control the second compressor to operate according to the first operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the first set temperature, and control the second compressor to operate according to the set first minimum frequency. The specific functions and processes of the control unit 104 are also referred to in step S640.

The control unit 106 may be further configured to, in a second setting mode, control a first compressor of a first temperature-stage circulation system in the multi-split air conditioning system to be turned off, control a second compressor of a second temperature-stage circulation system in the multi-split air conditioning system to be turned on, and control an auxiliary electric heating system in the multi-split air conditioning system to be turned off. The specific functions and processes of the control unit 104 are also referred to in step S710. Wherein the first compressor of the first temperature stage circulating system, such as the low temperature compressor of the low temperature stage circulating system. And a second compressor of a second temperature stage circulating system in the multi-split system, such as a high temperature compressor of a high temperature stage circulating system. And an auxiliary electric heating system in the multi-split system, such as an auxiliary electric heater of the multi-split system.

The control unit 106 may be further specifically configured to determine whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a second set temperature in the second setting mode. The specific functions and processes of the control unit 104 are also referred to in step S720. Wherein the second set temperature, i.e. the second set temperature T2 ℃.

The control unit 106 may be further configured to, if the temperature difference between the target temperature and the indoor environment temperature in the second setting mode is greater than or equal to a second setting temperature, continue to acquire the indoor environment temperature of the multi-split air-conditioning system, so as to continue to determine whether the acquired temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the second setting temperature. The specific functions and processes of the control unit 104 are also referred to in step S730.

The control unit 106 may be further configured to control the operating frequency of the second compressor to decrease to a second operating frequency if the temperature difference between the target temperature and the indoor environment temperature is less than a second set temperature in the second set mode, and control the second compressor to operate at the second operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the second set temperature, and then control the second compressor to operate at a second set lowest frequency. The specific functions and processes of the control unit 104 are also referred to in step S740.

The control unit 106 may be further configured to, in a third setting mode, control a first compressor of a first temperature-stage circulation system in the multi-split air conditioning system to be turned off, control a second compressor of a second temperature-stage circulation system in the multi-split air conditioning system to be turned on, and control an auxiliary electric heating system in the multi-split air conditioning system to be turned on. The specific functions and processes of the control unit 104 are also referred to in step S810. Wherein the first compressor of the first temperature stage circulating system, such as the low temperature compressor of the low temperature stage circulating system. And a second compressor of a second temperature stage circulating system in the multi-split system, such as a high temperature compressor of a high temperature stage circulating system. And an auxiliary electric heating system in the multi-split system, such as an auxiliary electric heater of the multi-split system.

The control unit 106 may be further configured to determine whether a temperature difference between the acquired target temperature and the indoor environment temperature is equal to a third set value in the third setting mode, and determine whether a temperature difference between the acquired target temperature and the indoor environment temperature is greater than or equal to a third set temperature. The specific function and processing of the control unit 104 are also referred to in step S820. Wherein the third set point, i.e. the third set point Q3 ℃. A third set temperature, T3 deg.c.

The control unit 106 may be further configured to control the auxiliary electric heating system to be turned off if the temperature difference between the target temperature and the indoor ambient temperature in the third setting mode is equal to a third setting value. The specific functions and processes of the control unit 104 are also referred to in step S830.

The control unit 106 may be further configured to, if the temperature difference between the target temperature and the indoor environment temperature in the third setting mode is greater than or equal to a third setting temperature, continue to acquire the indoor environment temperature of the multi-split air-conditioning system, so as to continue to determine whether the acquired temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the third setting temperature. The specific function and processing of the control unit 104 are also referred to in step S840.

The control unit 106 may be further configured to control the operating frequency of the second compressor to decrease to a third operating frequency if the temperature difference between the target temperature and the indoor environment temperature is less than a third set temperature in the third set mode, and control the second compressor to operate at the third operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the third set temperature, and control the second compressor to operate at a set third lowest frequency. The specific function and processing of the control unit 104 are also referred to in step S850.

The control unit 106 may be further configured to, in a fourth setting mode, control a first compressor of a first temperature-stage circulation system in the multi-split air conditioning system to be started, control a second compressor of a second temperature-stage circulation system in the multi-split air conditioning system to be started, and control an auxiliary electric heating system in the multi-split air conditioning system to be started. The specific functions and processes of the control unit 104 are also referred to in step S910. Wherein the first compressor of the first temperature stage circulating system, such as the low temperature compressor of the low temperature stage circulating system. And a second compressor of a second temperature stage circulating system in the multi-split system, such as a high temperature compressor of a high temperature stage circulating system. And an auxiliary electric heating system in the multi-split system, such as an auxiliary electric heater of the multi-split system.

The control unit 106 may be further configured to determine whether a temperature difference between the acquired target temperature and the indoor environment temperature is equal to a fourth setting value and determine whether a temperature difference between the acquired target temperature and the indoor environment temperature is greater than or equal to the fourth setting temperature in the fourth setting mode. The specific functions and processes of the control unit 104 are also referred to in step S920. Wherein the fourth setting, i.e. the fourth setting Q4 ℃. A fourth set temperature, i.e. a fourth set temperature T4 deg.c.

The control unit 106 may be further configured to control the auxiliary electric heating system to be turned off and control the first compressor to operate at a fourth set natural frequency if the temperature difference between the target temperature and the indoor environment temperature is equal to a fourth set value in the fourth set mode, until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the fourth set temperature, and control the first compressor to stop. The specific functions and processes of the control unit 104 are also referred to in step S930.

For example: in the fourth setting mode S4, the high-temperature stage compressor operates, the low-temperature stage compressor operates, and the auxiliary electric heating is turned on. The value of the inner ring temperature (i.e., the indoor ambient temperature) is detected in real time, and the relationship between the temperature difference between the user set temperature and the inner ring temperature and the fourth set temperature T4 deg.c is determined, for example, whether the temperature difference between the user set temperature and the inner ring temperature is equal to the fourth set value Q4 deg.c is determined. When the user set value, namely the inner ring temperature, is equal to a fourth set value Q4 ℃, the auxiliary electric heating is controlled to be turned off, and the compressor is controlled to operate at the natural frequency. After the compressor is controlled to run at the natural frequency until the user set value, namely the inner ring temperature, is equal to the fourth set temperature T4 ℃, the low-temperature stage compressor is controlled to stop.

The control unit 106 may be further configured to, if the temperature difference between the target temperature and the indoor environment temperature in the fourth setting mode is greater than or equal to a fourth setting temperature, continue to acquire the indoor environment temperature of the multi-split air-conditioning system, so as to continue to determine whether the acquired temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fourth setting temperature. The specific functions and processes of the control unit 104 are also referred to in step S940.

The control unit 106 may be further configured to control the operating frequency of the second compressor to decrease the fourth set frequency to the fourth operating frequency if the temperature difference between the target temperature and the indoor environment temperature is less than the fourth set temperature in the fourth set mode, and control the second compressor to operate at the fourth operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the fourth set temperature, and control the second compressor to operate at a set fourth lowest frequency. The specific functions and processes of the control unit 104 are also referred to in step S950.

The control unit 106 may be further configured to, in a fifth setting mode, control a first compressor of a first temperature-stage circulation system in the multi-split air conditioning system to be started, control a second compressor of a second temperature-stage circulation system in the multi-split air conditioning system to be started, and control an auxiliary electric heating system in the multi-split air conditioning system to be started. The specific functions and processes of the control unit 104 are also referred to in step S1010. Wherein the first compressor of the first temperature stage circulating system, such as the low temperature compressor of the low temperature stage circulating system. And a second compressor of a second temperature stage circulating system in the multi-split system, such as a high temperature compressor of a high temperature stage circulating system. And an auxiliary electric heating system in the multi-split system, such as an auxiliary electric heater of the multi-split system.

The control unit 106 may be further configured to determine, in the fifth setting mode, whether a temperature difference between the acquired target temperature and the indoor environment temperature is equal to a fifth setting value, and determine whether a temperature difference between the acquired target temperature and the indoor environment temperature is greater than or equal to the fifth setting temperature. The specific functions and processes of the control unit 104 are also referred to in step S1020. Wherein the fifth set point, i.e. the fifth set point Q5 ℃. A fifth set temperature, namely a fifth set temperature T5 deg.c.

The control unit 106 may be further configured to control the auxiliary electric heating system to be turned off and control the first compressor to operate at a fifth set natural frequency if the temperature difference between the target temperature and the indoor environment temperature is equal to a fifth set value in the fifth set mode, until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the fifth set temperature, and control the first compressor to stop. The specific functions and processing of the control unit 104 are also referred to in step S1030.

The control unit 106 may be further configured to, if the temperature difference between the target temperature and the indoor environment temperature in the fifth setting mode is greater than or equal to a fifth setting temperature, continue to acquire the indoor environment temperature of the multi-split air-conditioning system, so as to continue to determine whether the acquired temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fifth setting temperature. The specific functions and processing of the control unit 104 are also referred to in step S1040.

The control unit 106 may be further configured to, if the temperature difference between the target temperature and the indoor environment temperature is less than a fifth set temperature in the fifth set mode, control the operating frequency of the second compressor to decrease the fifth set frequency to the fifth operating frequency, and control the second compressor to operate at the fifth operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the fifth set temperature, and control the second compressor to operate at a fifth set lowest frequency. The specific functions and processes of the control unit 104 are also referred to in step S1050.

Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to 10, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.

Through a large number of tests, the technical scheme of the invention is adopted, energy conservation is considered by taking user comfort as a purpose, and load supply control is carried out by taking the environment temperature and the user load demand as judgment bases, so that the problems of energy saving and comfort incapability caused by unreasonable control under high load output can be solved, and the user comfort is improved.

According to an embodiment of the present invention, there is also provided a multi-split system corresponding to the operation control device. The multi-split system may include: the operation control device described above.

The indoor air conditioning requirement of a room is applied, the water machine with linkage of an indoor machine and an outdoor machine can be realized, the indoor air conditioning requirement has stronger product competitiveness than that of some household water machines which cannot be linked, the comfortable air conditioning capacity of the indoor air conditioning machine can be matched with a fluorine multi-split air conditioner, the indoor air conditioning machine is favored more and more, and the indoor air conditioning machine has the advantages of high matching ratio and no excessive dehumidification during refrigeration.

As shown in fig. 12, a multi-indoor unit type of water multi-connected type has a plurality of indoor units linked to one outdoor unit through a water system. The control end of the control system is arranged on the inner machine, the output of the outer machine is controlled according to the requirement of the inner machine, and the most needed water feeding temperature and flow rate are given to the inner machine; the indoor unit is responsible for adjusting air volume. Therefore, the control operation of the water multi-connected unit is realized. Compared with some household water machines, the linkage control function of the main machine and the indoor air disc can be increased, the tail end control is directly carried out, and the main machine does not need to be operated independently. The host machine adopts intelligent variable water temperature control, and automatically adjusts water temperature setting according to indoor real-time load requirements; compared with the constant water temperature output of some household water machines, the operation cost of the machine set can be effectively reduced.

When the household water multi-unit is carried with the wind disc for heating, the operating water temperature of the hot water generator is 25-55 ℃, and the operating water temperature range can basically meet the heating requirement of household rooms. But the maximum operation water temperature of 55 ℃ cannot meet the requirement of comfort in a cold region with large part of heating load requirements. The factors for restricting the generation of high-temperature hot water mainly include the following aspects:

first, the compression ratio of the compressor. If the compression ratio of the compressor is too high, the gas transmission coefficient, the gas transmission amount, and the efficiency of the compressor are likely to be lowered.

Second, the discharge temperature of the compressor. If the discharge temperature of the compressor is too high, the viscosity of the lubricating oil is also rapidly reduced, which affects the lubrication of the compressor.

Third, the highest discharge pressure of the compressor, the maximum input current. The two parameter values of the highest exhaust pressure and the maximum input current of the compressor are often simultaneously in the extreme operating conditions of the system operation. If the evaporating pressure of the system is too low, the suction pressure of the compressor will also decrease, thereby affecting the normal operation of the system. Under the background, an ultra-high temperature cascade hot water system is produced, and the cascade system refers to a system for preparing high-temperature hot water by taking outdoor ambient air as a low-temperature heat source by taking the principle of cascade refrigeration as reference. The high-temperature stage circulation and the low-temperature stage circulation of the cascade heat pump system are independently operated and are respectively carried out according to the reverse Carnot circulation. The evaporative condenser is a key component for connecting two stages, and the function of the evaporative condenser is to complete the transfer of heat from a low-temperature stage cycle to a high-temperature stage cycle.

In an optional embodiment, some water multi-coupling products are concerned about because the water multi-coupling products do not excessively dehumidify and have good comfort performance, and meanwhile, the requirement of users cannot be met in areas with large heat load due to secondary heat exchange in the middle, so that the popularization of the water multi-coupling products is limited to a great extent. In order to at least solve the problem that a multi-split system cannot meet the comfort requirements of users in different environments, such as at least solving the problem that the heat supply load in a low-temperature area cannot meet the requirements of the users, the scheme of the invention provides an ultrahigh-temperature cascade type central multi-split system and an energy utilization mode.

In an optional example, the scheme of the invention provides an operation mode of a cascade double system (such as a cascade double system formed by a high-temperature stage circulation system and a low-temperature stage circulation system) applied to a water multi-connected product, so that the problem of insufficient high-temperature heat sources of the multi-connected system in a part of cold regions can be effectively solved.

The operation mode of the cascade type double system (such as a cascade type double system formed by a high-temperature stage circulation system and a low-temperature stage circulation system) applied to the water multi-connection product can change the problems of non-energy saving and discomfort caused by unreasonable control under high-load output from the control strategy through a load supply control idea taking user comfort as the aim and taking energy saving into consideration and taking the environment temperature and the user load demand as judgment bases.

In an alternative embodiment, a specific implementation process of the scheme of the present invention can be exemplarily described with reference to the examples shown in fig. 13 to fig. 20.

Fig. 13 is a schematic structural view of the cascade circulation system. In fig. 13, a cascade circulation system may include: the high-temperature compressor (the high-temperature compressor can be provided with an electric heater) 1, a first exhaust temperature sensing bulb 11, a first high-pressure switch 12, a first high-pressure sensor 13, a first air-suction temperature sensing bulb 14, a first heating low-pressure switch 15, a first refrigerating low-pressure switch 16, a four-way valve 2, a steam separator 3, a condensing evaporator 4, a first environment temperature sensing bulb 41, a first defrosting temperature sensing bulb 42, a first electronic expansion valve 43, a first refrigerant pipe temperature sensing bulb 44, a first refrigerant pipe temperature sensing bulb 45, a second electronic expansion valve 46, a water side heat exchanger 5, a first water outlet temperature sensing bulb 51, a first water flow switch 52, a first expansion valve 53, a water pump 54, a safety valve 55, an auxiliary electric heater 56, a filter 57, a first anti-freezing temperature sensing bulb 58, a first water inlet temperature sensing bulb 59, a low-temperature compressor (the low-temperature compressor can be provided with an electric heater) 6, a first low-pressure switch 61, a second exhaust temperature sensing bulb 62, a second, A second high-voltage switch 63, a first inner machine 7, a second inner machine 8, and a third inner machine 9.

The cascade circulation system is divided into a low-temperature circulation system and a high-temperature circulation system. In the low-temperature stage circulating system, a low-temperature stage working medium absorbs heat of outdoor air in an evaporator, the low-temperature stage working medium is changed into a gas state at the same temperature and the same pressure from a low-temperature low-pressure gas-liquid mixed state, the gas state low-pressure working medium enters a low-temperature stage compressor and is compressed into a high-temperature high-pressure gas state working medium, the high-temperature high-pressure gas state working medium enters an evaporative condenser to release heat and is condensed into a high-temperature high-pressure liquid state working medium, the high-temperature high-pressure liquid state working medium is reduced in pressure by a low-temperature stage throttling valve to be changed.

Fig. 15 is a schematic view of the working principle of fig. 13. Some water multi-connected systems are in a single-system mode, while the systems shown in fig. 13 and 15 are dual-circulation systems, that is, dual-circulation systems with high-temperature stages and low-temperature stages are added, and the dual-circulation systems can still achieve corresponding heating effects in cold regions.

In fig. 13 and 15, the high temperature stage condenser side provides a heat source for the water side heat exchanger to produce hot water to provide heat to the indoor side. And the condensing evaporator side provides higher evaporation temperature for the high-temperature stage side so as to provide higher evaporation temperature for the high-temperature stage circulating system through the low-temperature stage circulating system. Without the low-temperature-stage circulation system, the evaporator on the high-temperature-stage side has a great difficulty in directly absorbing heat from the outdoor lower-temperature environment, which causes limitation of the temperature of the heating water, and thus, a cascade circulation system is required.

The following describes, by way of example, a specific implementation procedure of the high-temperature cascade system control method in the solution of the present invention with reference to the examples shown in fig. 14 and fig. 16 to 20.

The ambient temperature may be a temperature value detected by an ambient temperature sensing bulb. The user set value can be the temperature value set by the user of the multi-split system through the manual operator. The inner ring temperature can be the temperature value detected by the return air temperature sensing bulb.

In an alternative specific example, referring to the example shown in fig. 14, the control process of the high-temperature cascade system in the solution of the present invention may include:

step 10, determining a temperature value detected by the environmental temperature bulb, that is, determining a relationship between an environmental temperature (that is, an outdoor environmental temperature or an outer ring temperature) and a lower limit a of a first set temperature range and an upper limit b of the first set temperature range, and if determining that the environmental temperature (that is, the outdoor environmental temperature or the outer ring temperature) is less than or equal to the lower limit a of the first set temperature range, executing step 40; or judging whether the environment temperature (i.e. the outdoor environment temperature or the outer ring temperature) is greater than the lower limit a of the first set temperature range and less than or equal to the upper limit b of the first set temperature range, and executing step 30; or whether the ambient temperature (i.e., the outdoor ambient temperature or the outer ring temperature) is greater than the upper limit b of the first set temperature range, step 20 is performed. Wherein, the lower limit a of the first set temperature range is smaller than the upper limit b of the first set temperature range.

Step 20, when the environment temperature (i.e. outdoor environment temperature or outer ring temperature) > is higher than the upper limit b of the first set temperature range, determining the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range, if the user set value is less than or equal to the lower limit N of the second set temperature range, executing step 21; or judging whether the user set value is larger than the lower limit N of the second set temperature range and smaller than or equal to the upper limit M of the second set temperature range, and executing the step 22; or judging whether the user set value is larger than the upper limit M of the second set temperature range, and executing the step 23.

In step 21, when the user set value < the lower limit N of the second set temperature range, the first setting mode S1 is executed.

Specifically, referring to the example shown in fig. 16, the execution process of the first setting mode S1 may include:

and step 211, the high-temperature stage compressor acts, the low-temperature compressor is forbidden to be started, and the auxiliary electric heating is closed. Namely, the action branch of the high-temperature stage compressor is opened, and the action branch of the low-temperature stage compressor and the auxiliary electric heating branch are closed.

Step 212, detecting the value of the inner ring temperature (i.e. the indoor environment temperature) in real time, and determining the relationship between the temperature difference between the user-set temperature and the inner ring temperature and the first set temperature, for example, determining whether the temperature difference between the user-set temperature and the inner ring temperature is greater than or equal to the first set temperature T1 ℃, execute step 213.

And step 213, when the user set value-inner ring temperature is greater than or equal to the first set temperature T1 ℃, returning to step 212 to continue to detect the inner ring temperature.

Optionally, if the user set value-inner ring temperature is less than the first set temperature T1 ℃, controlling the high-temperature compressor to perform down-conversion operation, for example, controlling the high-temperature stage compressor frequency-first set frequency P1, and controlling the compressor to perform down-conversion operation at the frequency until the user set value-inner ring temperature-first set temperature T1 ℃, and then controlling the high-temperature stage compressor to perform operation at the set lowest frequency.

In step S22, when the lower limit N of the second set temperature range < the user set value < the upper limit M of the second set temperature range, the second setting mode S2 is executed.

Specifically, referring to the example shown in fig. 17, the execution process of the second setting mode S2 may include:

and step 221, the high-temperature stage compressor acts, the low-temperature compressor is forbidden to be started, and the auxiliary electric heating is closed. Namely, the action branch of the high-temperature stage compressor is opened, and the action branch of the low-temperature stage compressor and the auxiliary electric heating branch are closed.

Step 222, detecting the value of the inner loop temperature (i.e. the indoor environment temperature) in real time, and determining the relationship between the temperature difference between the user-set temperature and the inner loop temperature and the second set temperature T2 ℃, for example, determining whether the temperature difference between the user-set temperature and the inner loop temperature is greater than or equal to the second set temperature T2 ℃, then step 223 is executed.

And step 223, when the user set value, namely the inner ring temperature, is greater than or equal to the second set temperature T2 ℃, returning to the step 222 to continuously detect the inner ring temperature.

Optionally, if the user set value-inner ring temperature is less than the second set temperature T2 ℃, controlling the high-temperature compressor to perform down-conversion operation, for example, controlling the high-temperature stage compressor frequency-second set frequency P2, and controlling the compressor to perform down-conversion operation at the frequency until the user set value-inner ring temperature-second set temperature T2 ℃, and then controlling the high-temperature stage compressor to perform operation at the set lowest frequency.

In step S23, when the upper limit M of the second set temperature range < the user set value, the third setting mode S3 is executed.

Specifically, referring to the example shown in fig. 18, the execution process of the third setting mode S3 may include:

and 231, operating the high-temperature stage compressor, forbidding to turn on the low-temperature compressor, and turning on the auxiliary electric heating. Namely, the action branch of the high-temperature stage compressor is opened, the action branch of the low-temperature stage compressor is closed, and the auxiliary electric heating branch is opened.

Step 232, detecting the value of the inner ring temperature (i.e. the indoor environment temperature) in real time, and determining the relationship between the temperature difference between the user set temperature and the inner ring temperature and a third set temperature, if it is determined whether the temperature difference between the user set temperature and the inner ring temperature is equal to a third set value Q3 ℃, performing step 233; it is determined whether the temperature difference between the user set temperature and the inner loop temperature is greater than or equal to the third set temperature T3 deg.c, step 234 is performed, and so on.

And step 233, controlling the auxiliary electric heating to be turned off when the user set value-inner ring temperature is equal to a third set value Q3 ℃.

Step 234, determine if the user set point-inner loop temperature is greater than or equal to the third set point temperature T3 ℃.

Alternatively, if the user set point, inner loop temperature, is greater than or equal to the third set point temperature T3 ℃, then return to step 232 to continue sensing the inner loop temperature.

Optionally, if the user set value-inner ring temperature is less than the third set temperature T3 ℃, controlling the high-temperature compressor to perform down-conversion operation, for example, controlling the high-temperature stage compressor frequency-third set frequency P3, and controlling the compressor to perform down-conversion operation at the frequency until the user set value-inner ring temperature-third set temperature T3 ℃, and then controlling the high-temperature stage compressor to perform operation at the set lowest frequency.

Step 30, when the lower limit a of the first set temperature range is less than the environment temperature (i.e. the outdoor environment temperature or the outer ring temperature) and less than or equal to the upper limit b of the first set temperature range, determining the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range, if the user set value is less than or equal to the lower limit N of the second set temperature range, executing step 31; or judging whether the user set value is larger than the lower limit N of the second set temperature range and smaller than or equal to the upper limit M of the second set temperature range, and executing step 32; or determining whether the user setting value is greater than the upper limit M of the second setting temperature range, and executing step 33.

In step 31, when the user setting value is less than or equal to the lower limit N of the second setting temperature range, the second setting mode S2 is executed.

And step 32, when the lower limit N of the second set temperature range is less than or equal to the upper limit M of the second set temperature range, executing a third set mode S3.

In step S33, when the upper limit M of the second set temperature range is less than the user set value, the fourth setting mode S4 is executed.

Specifically, referring to the example shown in fig. 19, the execution process of the fourth setting mode S4 may include:

and step 331, operating the high-temperature compressor, operating the low-temperature compressor, and starting the auxiliary electric heating. Namely, the low-temperature stage compressor action branch, the high-temperature stage compressor action branch and the auxiliary electric heating branch are simultaneously opened.

Step 332, detecting the value of the inner ring temperature (i.e. the indoor environment temperature) in real time, and determining the relationship between the temperature difference between the user set temperature and the inner ring temperature and the fourth set temperature T4 ℃, if it is determined whether the temperature difference between the user set temperature and the inner ring temperature is equal to the fourth set value Q4 ℃, executing step 333; it is determined whether the temperature difference between the user set temperature and the inner loop temperature is greater than or equal to the fourth set temperature T4 deg.c, step 334 is performed, and so on.

And step 333, when the user set value-inner ring temperature is equal to a fourth set value Q4 ℃, controlling the auxiliary electric heating to be closed, and controlling the compressor to operate at the natural frequency. After the compressor is controlled to run at the natural frequency until the user set value, namely the inner ring temperature, is equal to the fourth set temperature T4 ℃, the low-temperature stage compressor is controlled to stop.

Step 334 determines whether the user set point-inner loop temperature is greater than or equal to the fourth set point temperature T4 deg.c.

Alternatively, if the user set point, inner loop temperature, is greater than or equal to the fourth set temperature T4 ℃, then return to step 332 to continue sensing the inner loop temperature.

Optionally, if the user set value — inner ring temperature is less than the fourth set temperature T4 ℃, controlling the high-temperature compressor to perform down-conversion operation, for example, controlling the high-temperature stage compressor frequency — fourth set frequency P4, and controlling the compressor to perform down-conversion operation at the frequency until the user set value — inner ring temperature — fourth set temperature T4 ℃, and then controlling the high-temperature stage compressor to perform operation at the set lowest frequency.

Step 40, when the environment temperature (i.e. outdoor environment temperature or outer ring temperature) is less than or equal to the lower limit a of the first set temperature range, determining the relationship between the user set value and the lower limit N of the second set temperature range and the upper limit M of the second set temperature range, if it is determined whether the user set value is less than or equal to the lower limit N of the second set temperature range, executing step 41; or judging whether the user set value is larger than the lower limit N of the second set temperature range and smaller than or equal to the upper limit M of the second set temperature range, and executing step 42; or whether the user set value is greater than the upper limit M of the second set temperature range, and step 43 is executed. Wherein the lower limit N of the second set temperature range may be less than the upper limit M of the second set temperature range.

And step 41, when the user set value is less than or equal to the lower limit N of the second set temperature range, executing a third set mode S3.

Step 42, when the lower limit N of the second set temperature range < the user set value ≦ the upper limit M of the second set temperature range, the fourth setting mode S4 is executed.

In step 43, when the upper limit M of the second set temperature range < the user set value, the fifth setting mode S5 is executed.

Specifically, referring to the example shown in fig. 20, the execution process of the fifth setting mode S5 may include:

and 431, actuating the high-temperature-stage compressor, actuating the low-temperature compressor, and starting the auxiliary electric heating. Namely, the low-temperature stage compressor action branch, the high-temperature stage compressor action branch and the auxiliary electric heating branch are simultaneously opened.

Step 432, detecting the value of the inner ring temperature (i.e. the indoor environment temperature) in real time, and determining the relationship between the temperature difference between the user-set temperature and the inner ring temperature and the fifth set temperature T5 ℃, if it is determined whether the temperature difference between the user-set temperature and the inner ring temperature is equal to the fifth set value Q5 ℃, executing step 433; it is determined whether the temperature difference between the user set temperature and the inner loop temperature is greater than or equal to the fifth set temperature T5 deg.c, step 434 is performed, and so on.

And 433, when the user set value, namely the inner ring temperature, is equal to a fifth set value Q5 ℃, controlling the auxiliary electric heating to be turned off, controlling the compressor to operate at the natural frequency, and controlling the high-low temperature stage compressor and the low-low temperature stage compressor to be stopped simultaneously (namely controlling the low-temperature compressor and the high-temperature compressor to be stopped).

Step 434, determine if the user set point-inner loop temperature is greater than or equal to the fifth set point temperature T5 ℃.

Alternatively, if the user set point, inner loop temperature, is greater than or equal to the fifth set point temperature T5 ℃, return to step 432 to continue detecting the inner loop temperature.

Optionally, if the user set value-inner ring temperature is less than the fifth set temperature T5 ℃, controlling the high-temperature compressor to perform down-conversion operation, for example, controlling the high-temperature stage compressor frequency-fifth set frequency P5, and controlling the compressor to perform down-conversion operation at the frequency until the user set value-inner ring temperature-fifth set temperature T5 ℃, and then controlling the high-temperature stage compressor to perform operation at the set lowest frequency. The user set value-inner ring temperature-T5 ℃, i.e. the inner ring temperature is higher than the user set value, and is called compensation temperature in the refrigeration and air conditioning industry.

Since the processing and functions implemented by the multi-split system of the present embodiment substantially correspond to the embodiment, the principle and the example of the apparatus shown in fig. 11, the description of the present embodiment is not detailed, and reference may be made to the related description in the foregoing embodiments, which is not repeated herein.

Through a large number of tests, the technical scheme of the invention monitors different environmental temperatures and user load requirements by utilizing the cascade type double system formed by the high-temperature-stage circulating system and the low-temperature-stage circulating system, and carries out bidirectional control according to the environmental temperatures and the user load requirements, thereby improving the comfortable feeling of users and considering energy conservation.

According to an embodiment of the present invention, there is also provided a storage medium corresponding to the operation control method. The storage medium may include: the storage medium has stored therein a plurality of instructions; the instructions are used for loading and executing the operation control method by the processor.

Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 10, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.

Through a large number of tests, the technical scheme of the invention is adopted, and a cascade type double system formed by the high-temperature-level circulating system and the low-temperature-level circulating system is utilized, so that the comfort of a user is taken as the aim, the energy saving performance is considered, the load control is carried out by taking the environment temperature and the load requirement of the user as the judgment basis, and the comfort feeling of the user in different environments can be improved.

According to the embodiment of the invention, a multi-split system corresponding to the operation control method is also provided. The multi-split system may include: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; wherein the instructions are stored in the memory, and loaded by the processor and execute the operation control method.

Since the processing and functions implemented by the multi-split system of the present embodiment substantially correspond to the embodiments, principles and examples of the methods shown in fig. 1 to fig. 10, reference may be made to the related descriptions in the foregoing embodiments for details which are not described in the description of the present embodiment, and thus are not described herein again.

Through a large number of tests, the technical scheme of the invention is adopted, the load supply control is carried out by taking the user comfort as the aim and taking the energy conservation as well as the ambient temperature and the user load demand as judgment bases, and the cascade type double system formed by the high-temperature-level circulating system and the low-temperature-level circulating system can be utilized to solve the problems of non-energy conservation and non-comfort caused by unreasonable control under high load output, improve the user comfort and take the energy conservation into account, and has good user experience.

In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An operation control method characterized by comprising:

acquiring the outdoor environment temperature, the target temperature and the indoor environment temperature of the multi-split system; the multi-split system is a cascade circulating system; the cascade circulation system includes: the system comprises a first temperature stage circulating system and a second temperature stage circulating system, wherein the operating temperature of the first temperature stage circulating system is lower than that of the second temperature stage circulating system;

determining the operation condition of the multi-split system according to the acquired outdoor environment temperature; wherein, operating condition includes: the method comprises the following steps of (1) setting a first set working condition, a second set working condition and/or a third set working condition; a first set condition, namely outdoor environment temperature > the upper limit of the first set temperature range; under a second set working condition, namely the lower limit of the first set temperature range is less than the outdoor environment temperature and less than or equal to the upper limit of the first set temperature range; under a third set working condition, namely the outdoor environment temperature is less than or equal to the lower limit of the first set temperature range;

under the determined operation condition, determining the operation mode of the multi-split system according to the obtained target temperature; an operational mode comprising: a first setting mode, a second setting mode, a third setting mode, a fourth setting mode, and/or a fifth setting mode; in a first setting mode, the high-temperature stage compressor acts, the low-temperature compressor is forbidden to be started, and the auxiliary electric heating is closed; in a second setting mode, the high-temperature stage compressor acts, the low-temperature compressor is forbidden to be started, and the auxiliary electric heating is closed; in a third setting mode, the high-temperature stage compressor acts, the low-temperature compressor is forbidden to be started, and the auxiliary electric heating is started; in a fourth setting mode, the high-temperature stage compressor acts, the low-temperature compressor acts, and the auxiliary electric heating is started; in a fifth setting mode, the high-temperature stage compressor acts, the low-temperature compressor acts, and the auxiliary electric heating is started;

and under the determined operation mode, controlling the operation process of the multi-split air conditioning system according to the acquired indoor environment temperature.

2. The operation control method according to claim 1, wherein determining the operation condition of the multi-split air conditioning system comprises:

determining the relation between the acquired outdoor environment temperature and the lower limit and the upper limit of a first set temperature range;

if the outdoor environment temperature is larger than the upper limit of the first set temperature range, determining the operation working condition of the multi-split air-conditioning system as a first set working condition;

if the outdoor environment temperature is greater than the lower limit of the first set temperature range and less than or equal to the upper limit of the first set temperature range, determining the operation working condition of the multi-split air-conditioning system as a second set working condition;

and if the outdoor environment temperature is less than or equal to the lower limit of the first set temperature range, determining the operation working condition of the multi-split air-conditioning system as a third set working condition.

3. The operation control method according to claim 1, wherein determining the operation mode of the multi-split air conditioning system comprises:

under a first set working condition, determining the relation between the acquired target temperature and the upper limit and the lower limit of a second set temperature range;

if the target temperature is higher than the upper limit of the second set temperature range under the first set working condition, determining the operation mode of the multi-split air-conditioning system as a first set mode;

if the target temperature is larger than the lower limit of the second set temperature range and smaller than or equal to the upper limit of the second set temperature range under the first set working condition, determining the operation mode of the multi-split air-conditioning system as a second set mode;

and if the target temperature is less than or equal to the lower limit of the second set temperature range under the first set working condition, determining the operation mode of the multi-split air-conditioning system to be a third set mode.

4. The operation control method according to claim 1, wherein determining the operation mode of the multi-split air conditioning system further comprises:

under a second set working condition, determining the relationship between the acquired target temperature and the upper limit and the lower limit of a second set temperature range;

if the target temperature is higher than the upper limit of the second set temperature range under the second set working condition, determining the operation mode of the multi-split air-conditioning system as a fourth set mode;

if the target temperature is greater than the lower limit of the second set temperature range and less than or equal to the upper limit of the second set temperature range under the second set working condition, determining the operation mode of the multi-split air-conditioning system to be a third set mode;

and if the target temperature is less than or equal to the lower limit of the second set temperature range under the second set working condition, determining the operation mode of the multi-split air-conditioning system to be the second set mode.

5. The operation control method according to claim 1, wherein determining the operation mode of the multi-split air conditioning system further comprises:

under a third set working condition, determining the relation between the acquired target temperature and the upper limit and the lower limit of the second set temperature range;

if the target temperature is higher than the upper limit of the second set temperature range under the third set working condition, determining that the operation mode of the multi-split air-conditioning system is a fifth set mode;

if the target temperature is larger than the lower limit of the second set temperature range and smaller than or equal to the upper limit of the second set temperature range under the third set working condition, determining that the operation mode of the multi-split air-conditioning system is a fourth set mode;

and if the target temperature is less than or equal to the lower limit of the second set temperature range under the third set working condition, determining the operation mode of the multi-split air-conditioning system to be a third set mode.

6. The operation control method according to any one of claims 1 to 5, wherein controlling the operation process of the multi-split air conditioning system comprises:

under a first setting mode, a first compressor of a first temperature stage circulating system in the multi-split air conditioning system is controlled to be closed, a second compressor of a second temperature stage circulating system in the multi-split air conditioning system is controlled to be opened, and an auxiliary electric heating system in the multi-split air conditioning system is controlled to be closed;

determining whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a first set temperature in a first set mode;

if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the first set temperature in the first set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system;

and if the temperature difference between the target temperature and the indoor environment temperature is less than the first set temperature in the first set mode, controlling the operating frequency of the second compressor to reduce the first set frequency to the first operating frequency, and controlling the second compressor to operate according to the first operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to the negative value of the first set temperature, and controlling the second compressor to operate according to the set first lowest frequency.

7. The operation control method according to any one of claims 1 to 5, wherein controlling the operation process of the multi-split air conditioning system further includes:

under a second setting mode, controlling a first compressor of a first temperature-level circulating system in the multi-split system to be closed, controlling a second compressor of a second temperature-level circulating system in the multi-split system to be opened, and controlling an auxiliary electric heating system in the multi-split system to be closed;

determining whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a second set temperature in a second set mode;

if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to a second set temperature in a second set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system;

and if the temperature difference between the target temperature and the indoor environment temperature is less than a second set temperature in a second set mode, controlling the operating frequency of the second compressor to reduce the second set frequency to a second operating frequency, and controlling the second compressor to operate according to the second operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the second set temperature, and controlling the second compressor to operate according to a set second lowest frequency.

8. The operation control method according to any one of claims 1 to 5, wherein controlling the operation process of the multi-split air conditioning system further includes:

under a third setting mode, controlling a first compressor of a first temperature-level circulating system in the multi-split system to be closed, controlling a second compressor of a second temperature-level circulating system in the multi-split system to be opened, and controlling an auxiliary electric heating system in the multi-split system to be opened;

determining whether a temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a third set value and whether a temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a third set temperature in a third set mode;

if the temperature difference between the target temperature and the indoor environment temperature is equal to a third set value in a third set mode, controlling the auxiliary electric heating system to be closed;

if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to a third set temperature in a third set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system;

and if the temperature difference between the target temperature and the indoor environment temperature is less than a third set temperature in a third set mode, controlling the operating frequency of the second compressor to reduce the third set frequency to a third operating frequency, and controlling the second compressor to operate according to the third operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the third set temperature, and controlling the second compressor to operate according to a set third lowest frequency.

9. The operation control method according to any one of claims 1 to 5, wherein controlling the operation process of the multi-split air conditioning system further includes:

under a fourth setting mode, controlling a first compressor of a first temperature-level circulating system in the multi-split system to be started, controlling a second compressor of a second temperature-level circulating system in the multi-split system to be started, and controlling an auxiliary electric heating system in the multi-split system to be started;

in a fourth setting mode, determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a fourth setting value, and determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a fourth setting temperature;

if the temperature difference between the target temperature and the indoor environment temperature is equal to a fourth set value in a fourth set mode, controlling the auxiliary electric heating system to be closed, and controlling the first compressor to operate according to a set fourth natural frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the fourth set temperature, and controlling the first compressor to stop;

if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fourth set temperature in the fourth set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system;

and if the temperature difference between the target temperature and the indoor environment temperature is less than the fourth set temperature in the fourth set mode, controlling the operating frequency of the second compressor to reduce the fourth set frequency to the fourth operating frequency, and controlling the second compressor to operate according to the fourth operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to the negative value of the fourth set temperature, and controlling the second compressor to operate according to the set fourth lowest frequency.

10. The operation control method according to any one of claims 1 to 5, wherein controlling the operation process of the multi-split air conditioning system further includes:

under a fifth setting mode, controlling a first compressor of a first temperature stage circulating system in the multi-split system to be started, controlling a second compressor of a second temperature stage circulating system in the multi-split system to be started, and controlling an auxiliary electric heating system in the multi-split system to be started;

in a fifth setting mode, determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is equal to a fifth setting value, and determining whether the temperature difference between the acquired target temperature and the indoor ambient temperature is greater than or equal to a fifth setting temperature;

if the temperature difference between the target temperature and the indoor environment temperature is equal to a fifth set value in a fifth set mode, controlling the auxiliary electric heating system to be closed, and controlling the first compressor to operate according to a set fifth natural frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to a negative value of the fifth set temperature, and controlling the first compressor to stop;

if the temperature difference between the target temperature and the indoor environment temperature is greater than or equal to the fifth set temperature in the fifth set mode, continuously acquiring the indoor environment temperature of the multi-split air-conditioning system;

and if the temperature difference between the target temperature and the indoor environment temperature is less than the fifth set temperature in the fifth set mode, controlling the operating frequency of the second compressor to reduce the fifth set frequency to the fifth operating frequency, and controlling the second compressor to operate according to the fifth operating frequency until the temperature difference between the target temperature and the indoor environment temperature is equal to the negative value of the fifth set temperature, and controlling the second compressor to operate according to the set fifth lowest frequency.

11. An operation control device characterized by comprising:

the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the outdoor environment temperature, the target temperature and the indoor environment temperature of the multi-split system; the multi-split system is a cascade circulating system; the cascade circulation system includes: the system comprises a first temperature stage circulating system and a second temperature stage circulating system, wherein the operating temperature of the first temperature stage circulating system is lower than that of the second temperature stage circulating system;

the determining unit is used for determining the operation condition of the multi-split system according to the acquired outdoor environment temperature; wherein, operating condition includes: the method comprises the following steps of (1) setting a first set working condition, a second set working condition and/or a third set working condition; a first set condition, namely outdoor environment temperature > the upper limit of the first set temperature range; under a second set working condition, namely the lower limit of the first set temperature range is less than the outdoor environment temperature and less than or equal to the upper limit of the first set temperature range; under a third set working condition, namely the outdoor environment temperature is less than or equal to the lower limit of the first set temperature range;

the determining unit is further used for determining the operation mode of the multi-split system according to the acquired target temperature under the determined operation condition; an operational mode comprising: a first setting mode, a second setting mode, a third setting mode, a fourth setting mode, and/or a fifth setting mode; in a first setting mode, the high-temperature stage compressor acts, the low-temperature compressor is forbidden to be started, and the auxiliary electric heating is closed; in a second setting mode, the high-temperature stage compressor acts, the low-temperature compressor is forbidden to be started, and the auxiliary electric heating is closed; in a third setting mode, the high-temperature stage compressor acts, the low-temperature compressor is forbidden to be started, and the auxiliary electric heating is started; in a fourth setting mode, the high-temperature stage compressor acts, the low-temperature compressor acts, and the auxiliary electric heating is started; in a fifth setting mode, the high-temperature stage compressor acts, the low-temperature compressor acts, and the auxiliary electric heating is started;

and the control unit is used for controlling the operation process of the multi-split system according to the acquired indoor environment temperature in the determined operation mode.

12. The operation control device according to claim 11, wherein the determining unit determines the operation condition of the multi-split system, and includes:

13. The operation control device according to claim 11, wherein the determination unit determines the operation mode of the multi-split system, including:

14. The operation control device according to claim 11, wherein the determination unit determines an operation mode of the multi-split system, further comprising:

15. The operation control device according to claim 11, wherein the determination unit determines an operation mode of the multi-split system, further comprising:

16. The operation control device according to any one of claims 11 to 15, wherein the control unit controls an operation process of the multi-split air conditioning system, and includes:

17. The operation control device according to any one of claims 11 to 15, wherein the control unit controls an operation process of the multi-split air conditioning system, and further comprises:

18. The operation control device according to any one of claims 11 to 15, wherein the control unit controls an operation process of the multi-split air conditioning system, and further comprises:

19. The operation control device according to any one of claims 11 to 15, wherein the control unit controls an operation process of the multi-split air conditioning system, and further comprises:

20. The operation control device according to any one of claims 11 to 15, wherein the control unit controls an operation process of the multi-split air conditioning system, and further comprises:

21. A multiple on-line system, comprising: the operation control device according to any one of claims 11 to 20;

alternatively, it comprises:

a processor for executing a plurality of instructions;

a memory to store a plurality of instructions;

wherein the plurality of instructions are for being stored by the memory and loaded and executed by the processor to perform the operation control method according to any one of claims 1 to 10.

22. A storage medium having a plurality of instructions stored therein; the plurality of instructions for being loaded by a processor and executing the operation control method according to any one of claims 1 to 10.