CN105020855A - Variable frequency air conditioner control method and system - Google Patents
Variable frequency air conditioner control method and system Download PDFInfo
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- CN105020855A CN105020855A CN201510444439.8A CN201510444439A CN105020855A CN 105020855 A CN105020855 A CN 105020855A CN 201510444439 A CN201510444439 A CN 201510444439A CN 105020855 A CN105020855 A CN 105020855A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a variable frequency air conditioner control method and system. The method includes the steps that 1, the indoor environmental temperature is collected; 2, the difference value between the indoor environmental temperature and a set indoor temperature is worked out; and 3, the operating frequency of an inverter compressor or the rotation speed of a direct-current fan of an indoor unit is adjusted according to the difference value between the indoor environmental temperature and the set indoor temperature. The system comprises an indoor environmental temperature sensor, a controller, the inverter compressor and the direct-current fan of the indoor unit, wherein the indoor environmental temperature sensor is used for collecting the indoor environmental temperature; the controller is used for working out the difference value between the indoor environmental temperature and the set indoor temperature, and adjusting the operating frequency of the inverter compressor or the rotation speed of the direct-current fan of the indoor unit according to the difference value between the indoor environmental temperature and the set indoor temperature. By means of the variable frequency air conditioner control method and system, frequent starting of the inverter compressor can be reduced or avoided, the service life of the inverter compressor is prolonged, a stable indoor environmental temperature is maintained, the comfort degree is improved, and the operative reliability of an air conditioner is guaranteed.
Description
Technical field
The present invention relates to air-conditioning technique field, particularly relate to a kind of control method and system of convertible frequency air-conditioner.
Background technology
Generally, air-conditioner is when refrigeration, heating operation, after the temperature that indoor environment temperature reaches presetting, then frequency-changeable compressor runs with low-limit frequency, until environment temperature is lower than design temperature during refrigeration, or when heating, environment temperature, higher than after design temperature, directly stops the operation of outdoor frequency-changeable compressor, to meet the requirement of client to temperature, i.e. comfortableness requirement.
But; the space sealing of current people's life is become better and better; when convertible frequency air-conditioner boot running time is more and more of a specified duration; even convertible frequency air-conditioner; it is also more and more common that Da Wen shuts down phenomenon; this is an acid test to frequency-changeable compressor service life too, and then affects air-conditioner whole service life.Meanwhile, startup is repeatedly also unfavorable to the balance of indoor environment temperature, the frequent fluctuation of environment temperature, larger on comfortableness impact.
Summary of the invention
Technical problem to be solved by this invention reduces or avoids frequency-changeable compressor frequent starting, provides a kind of control method and system of convertible frequency air-conditioner.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of control method of convertible frequency air-conditioner, comprises the following steps:
Step S1, gathers indoor environment temperature;
Step S2, calculates the difference between described indoor environment temperature and indoor design temperature;
Step S3, regulates the running frequency of frequency-changeable compressor or the rotating speed of indoor set DC fan according to the difference between described indoor environment temperature and described indoor design temperature.
On the basis of technique scheme, the present invention can also do following improvement.
Further, when refrigerating of convertible frequency air conditioner runs, setting refrigeration indoor environment temperature is T1, in cool room, design temperature is TS, difference in described refrigeration indoor environment temperature and described cool room between design temperature is TC, and TC=T1-TS, then when refrigerating of convertible frequency air conditioner runs, step S3 comprises:
As TC >=TC1, frequency-changeable compressor is regulated to run with default highest frequency;
As TC2≤TC < TC1, reduce the running frequency of frequency-changeable compressor until preset low-limit frequency;
As TC3≤TC < TC2, reduce the rotating speed of indoor set DC fan until preset minimum speed;
As TC < TC3, regulate frequency-changeable compressor to reach temperature and shut down;
Wherein TC3 < TC2 < TC1, TC1 are first threshold, and TC2 is Second Threshold, and TC3 is the 3rd threshold value.
Further, frequency-changeable compressor be in reach warm stopped status time, as TC >=TC4, regulate frequency-changeable compressor to start, and to run with default low-limit frequency; Wherein TC2 < TC4 < TC1, TC4 are that refrigeration restarts threshold value.
Further, when convertible frequency air-conditioner heating operation, it is T1 ' that setting heats indoor environment temperature, in heating chamber, design temperature is TS ', the described difference heated in indoor environment temperature and described heating chamber between design temperature is TC ', and TC '=TS '-T1 ', then when convertible frequency air-conditioner heating operation, step S3 comprises:
As TC ' >=TC5, frequency-changeable compressor is regulated to run with default highest frequency;
As TC6≤TC ' < TC5, reduce the running frequency of frequency-changeable compressor until preset low-limit frequency;
As TC7≤TC ' < TC6, reduce the rotating speed of indoor set DC fan until preset minimum speed;
As TC ' < TC7, regulate frequency-changeable compressor to reach temperature and shut down;
Wherein TC7 < TC6 < TC5, TC5 are the 5th threshold value, and TC6 is the 6th threshold value, and TC7 is the 7th threshold value.
Further, frequency-changeable compressor be in reach warm stopped status time, as TC ' >=TC8, regulate frequency-changeable compressor to start, and to run with default low-limit frequency; Wherein TC6 < TC8 < TC5, TC8 restarts threshold value for heating.
The another kind of technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of control system of convertible frequency air-conditioner, comprises indoor environment temperature sensor, controller, frequency-changeable compressor and indoor set DC fan;
Described indoor environment temperature sensor is for gathering indoor environment temperature;
Described controller is for calculating the difference between indoor environment temperature and indoor design temperature; And regulate the running frequency of frequency-changeable compressor or the rotating speed of indoor set DC fan according to the difference between indoor environment temperature and indoor design temperature.
On the basis of technique scheme, the present invention can also do following improvement.
Further, when refrigerating of convertible frequency air conditioner runs, setting refrigeration indoor environment temperature is T1, in cool room, design temperature is TS, difference in refrigeration indoor environment temperature and cool room between design temperature is TC, and the value of TC=T1-TS, TC can just can be born, then when refrigerating of convertible frequency air conditioner runs, described controller regulates the rotating speed of the running frequency of described frequency-changeable compressor or described indoor set DC fan to be specially according to the difference in refrigeration indoor environment temperature and cool room between design temperature:
As TC >=TC1, described controller regulates described frequency-changeable compressor to run with default highest frequency;
As TC2≤TC < TC1, described controller controls described frequency-changeable compressor and reduces running frequency until preset low-limit frequency;
As TC3≤TC < TC2, the rotating speed that described controller controls described indoor set DC fan reduces until preset minimum speed;
As TC < TC3, described controller regulates described frequency-changeable compressor to reach temperature and shuts down;
Wherein TC3 < TC2 < TC1, TC1 are first threshold, and TC2 is Second Threshold, and TC3 is the 3rd threshold value.
Further, described frequency-changeable compressor be in reach warm stopped status time, as TC >=TC4, described controller regulates described frequency-changeable compressor to start, and runs with default low-limit frequency; Wherein TC2 < TC4 < TC1, TC4 are that refrigeration restarts threshold value.
Further, when convertible frequency air-conditioner heating operation, it is T1 ' that setting heats indoor environment temperature, in heating chamber, design temperature is TS ', the difference heated in indoor environment temperature and heating chamber between design temperature is TC ', and TC '=TS '-T1 ', then when convertible frequency air-conditioner heating operation, described controller regulates the rotating speed of the running frequency of described frequency-changeable compressor or described indoor set DC fan to be specially according to the difference heated in indoor environment temperature and heating chamber between design temperature:
As TC ' >=TC5, described controller regulates described frequency-changeable compressor to run with default highest frequency;
As TC6≤TC ' < TC5, described controller controls described frequency-changeable compressor and reduces running frequency until preset low-limit frequency;
As TC7≤TC ' < TC6, the rotating speed that described controller controls described indoor set DC fan reduces until preset minimum speed;
As TC ' < TC7, described controller regulates described frequency-changeable compressor to reach temperature and shuts down;
Wherein TC7 < TC6 < TC5, TC5 are the 5th threshold value, and TC6 is the 6th threshold value, and TC7 is the 7th threshold value.
Further, described frequency-changeable compressor be in reach warm stopped status time, as TC ' >=TC8, described controller regulates described frequency-changeable compressor to start, and runs with default low-limit frequency; Wherein TC6 < TC8 < TC5, TC8 restarts threshold value for heating.
The invention has the beneficial effects as follows: the present invention can prevent when indoor environment temperature and design temperature close to time, air-conditioner is shut down due to Da Wen, cause air-conditioner frequent start-stop, cause refrigeration or heat interruption, affect refrigeration or heating effect and air-conditioning frequent starting to the injury of compressor, pass through the present invention, when indoor environment temperature is close to design temperature, by the accurate control of controller, refrigeration can be maintained as much as possible or heat, be conducive to maintaining the stable of indoor environment temperature, improve comfortableness, and ensure the reliability of operation of air conditioner, extend compressor service life, reach better refrigeration or heating effect.
Accompanying drawing explanation
Fig. 1 is the control method of convertible frequency air-conditioner described in the embodiment of the present invention one;
Fig. 2 is the control system of convertible frequency air-conditioner described in the embodiment of the present invention two.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Fig. 1 is the control method of convertible frequency air-conditioner described in the embodiment of the present invention one.
As shown in Figure 1, a kind of control method of convertible frequency air-conditioner, comprises the following steps:
Step S1, gathers indoor environment temperature;
Step S2, calculates the difference between indoor environment temperature and indoor design temperature; Wherein indoor design temperature can be set according to demand by the remote controller of convertible frequency air-conditioner;
Step S3, regulates the running frequency of frequency-changeable compressor or the rotating speed of indoor set DC fan according to the difference between indoor environment temperature and indoor design temperature.
The running frequency of frequency-changeable compressor and the rotating speed of indoor set DC fan can preset, and as set the frequency level of the running frequency of frequency-changeable compressor, namely many gears run, and wherein can comprise highest frequency and low-limit frequency; In like manner, can set the rotating speed level of the rotating speed of indoor set DC fan, namely many gears run, and wherein can comprise maximum speed and minimum speed.
When refrigerating of convertible frequency air conditioner runs, setting refrigeration indoor environment temperature is T1, and in cool room, design temperature is TS, difference in refrigeration indoor environment temperature and cool room between design temperature is TC, and the value of TC=T1-TS, TC can just can be born, then when refrigerating of convertible frequency air conditioner runs, step S3 comprises:
As TC >=TC1, frequency-changeable compressor is regulated to run with default highest frequency;
As TC2≤TC < TC1, reduce the running frequency of frequency-changeable compressor until preset low-limit frequency;
As TC3≤TC < TC2, reduce the rotating speed of indoor set DC fan until preset minimum speed;
As TC < TC3, regulate frequency-changeable compressor to reach temperature and shut down;
Wherein TC3 < TC2 < TC1, TC1 are first threshold, and TC2 is Second Threshold, and TC3 is the 3rd threshold value.
Frequency-changeable compressor be in reach warm stopped status time, as TC >=TC4, regulate frequency-changeable compressor to start, and to run with default low-limit frequency.Wherein TC2 < TC4 < TC1, TC4 are that refrigeration restarts threshold value.
The value of above-mentioned TC1, TC2, TC3 and TC4 can be arranged according to specific needs, and in a particular embodiment, can set TC1 is 3 DEG C, and TC2 is 1 DEG C, and TC3 is-2 DEG C, and TC4 is 2 DEG C.
When convertible frequency air-conditioner heating operation, it is T1 ' that setting heats indoor environment temperature, and in heating chamber, design temperature is TS ', the difference heated in indoor environment temperature and heating chamber between design temperature is TC ', and TC '=TS '-T1 ', then when convertible frequency air-conditioner heating operation, step S3 comprises:
As TC ' >=TC5, frequency-changeable compressor is regulated to run with default highest frequency;
As TC6≤TC ' < TC5, reduce the running frequency of frequency-changeable compressor until preset low-limit frequency;
As TC7≤TC ' < TC6, reduce the rotating speed of indoor set DC fan until preset minimum speed;
As TC ' < TC7, regulate frequency-changeable compressor to reach temperature and shut down;
Wherein TC7 < TC6 < TC5, TC5 are the 5th threshold value, and TC6 is the 6th threshold value, and TC7 is the 7th threshold value.
Frequency-changeable compressor be in reach warm stopped status time, as TC ' >=TC8, regulate frequency-changeable compressor to start, and to run with default low-limit frequency.Wherein TC6 < TC8 < TC5, TC8 restarts threshold value for heating.
The value of above-mentioned TC5, TC6, TC7 and TC8 can be arranged according to specific needs, and in a particular embodiment, can set TC5 is 3 DEG C, and TC6 is 1 DEG C, and TC7 is-2 DEG C, and TC8 is 2 DEG C.
Fig. 2 is the control system of convertible frequency air-conditioner described in the embodiment of the present invention two.
As shown in Figure 2, a kind of control system of convertible frequency air-conditioner, comprises indoor environment temperature sensor, controller, frequency-changeable compressor and indoor set DC fan; Indoor environment temperature sensor is for gathering indoor environment temperature; Controller is for calculating the difference between indoor environment temperature and indoor design temperature; And regulate the running frequency of frequency-changeable compressor or the rotating speed of indoor set DC fan according to the difference between indoor environment temperature and indoor design temperature;
The running frequency of frequency-changeable compressor and the rotating speed of indoor set DC fan can preset, and as set the frequency level of the running frequency of frequency-changeable compressor, namely many gears run, and wherein can comprise highest frequency and low-limit frequency; In like manner, can set the rotating speed level of the rotating speed of indoor set DC fan, namely many gears run, and wherein can comprise maximum speed and minimum speed.
When refrigerating of convertible frequency air conditioner runs, setting refrigeration indoor environment temperature is T1, in cool room, design temperature is TS, difference in refrigeration indoor environment temperature and cool room between design temperature is TC, and TC=T1-TS, the value of TC can just can be born, then, when refrigerating of convertible frequency air conditioner runs, controller regulates the rotating speed of the running frequency of frequency-changeable compressor or indoor set DC fan to be specially according to the difference in refrigeration indoor environment temperature and cool room between design temperature:
As TC >=TC1, controller regulates frequency-changeable compressor to run with default highest frequency;
As TC2≤TC < TC1, controller controls frequency-changeable compressor and reduces running frequency until preset low-limit frequency;
As TC3≤TC < TC2, the rotating speed that controller controls indoor set DC fan reduces until preset minimum speed;
As TC < TC3, controller regulates frequency-changeable compressor to reach temperature and shuts down;
Wherein TC3 < TC2 < TC1, TC1 are first threshold, and TC2 is Second Threshold, and TC3 is the 3rd threshold value.
Frequency-changeable compressor be in reach warm stopped status time, as TC >=TC4, controller regulates frequency-changeable compressor to start, and runs with default low-limit frequency.Wherein TC2 < TC4 < TC1, TC4 are that refrigeration restarts threshold value.
The value of above-mentioned TC1, TC2, TC3 and TC4 can be arranged according to specific needs, and in a particular embodiment, can set TC1 is 3 DEG C, and TC2 is 1 DEG C, and TC3 is-2 DEG C, and TC4 is 2 DEG C.
When convertible frequency air-conditioner heating operation, it is T1 ' that setting heats indoor environment temperature, in heating chamber, design temperature is TS ', the difference heated in indoor environment temperature and heating chamber between design temperature is TC ', and TC '=TS '-T1 ', then when convertible frequency air-conditioner heating operation, controller regulates the rotating speed of the running frequency of frequency-changeable compressor or indoor set DC fan to be specially according to the difference heated in indoor environment temperature and heating chamber between design temperature:
As TC ' >=TC5, controller regulates frequency-changeable compressor to run with default highest frequency;
As TC6≤TC ' < TC5, controller controls frequency-changeable compressor and reduces running frequency until preset low-limit frequency;
As TC7≤TC ' < TC6, the rotating speed that controller controls indoor set DC fan reduces until preset minimum speed;
As TC ' < TC7, controller regulates frequency-changeable compressor to reach temperature and shuts down;
Wherein TC7 < TC6 < TC5, TC5 are the 5th threshold value, and TC6 is the 6th threshold value, and TC7 is the 7th threshold value.
Frequency-changeable compressor be in reach warm stopped status time, as TC ' >=TC8, controller regulates frequency-changeable compressor to start, and runs with default low-limit frequency.Wherein TC6 < TC8 < TC5, TC8 restarts threshold value for heating.
The value of above-mentioned TC5, TC6, TC7 and TC8 can be arranged according to specific needs, and in a particular embodiment, can set TC5 is 3 DEG C, and TC6 is 1 DEG C, and TC7 is-2 DEG C, and TC8 is 2 DEG C.
In the description of this description, concrete grammar, device or feature that the description of reference term " embodiment one ", " embodiment two ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, method, device or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a control method for convertible frequency air-conditioner, is characterized in that, comprises the following steps:
Step S1, gathers indoor environment temperature;
Step S2, calculates the difference between described indoor environment temperature and indoor design temperature;
Step S3, regulates the running frequency of frequency-changeable compressor or the rotating speed of indoor set DC fan according to the difference between described indoor environment temperature and described indoor design temperature.
2. the control method of convertible frequency air-conditioner according to claim 1, it is characterized in that, when refrigerating of convertible frequency air conditioner runs, setting refrigeration indoor environment temperature is T1, in cool room, design temperature is TS, and the difference in described refrigeration indoor environment temperature and described cool room between design temperature is TC, and TC=T1-TS, then when refrigerating of convertible frequency air conditioner runs, step S3 comprises:
As TC >=TC1, frequency-changeable compressor is regulated to run with default highest frequency;
As TC2≤TC < TC1, reduce the running frequency of frequency-changeable compressor until preset low-limit frequency;
As TC3≤TC < TC2, reduce the rotating speed of indoor set DC fan until preset minimum speed;
As TC < TC3, regulate frequency-changeable compressor to reach temperature and shut down;
Wherein TC3 < TC2 < TC1, TC1 are first threshold, and TC2 is Second Threshold, and TC3 is the 3rd threshold value.
3. the control method of convertible frequency air-conditioner according to claim 2, is characterized in that, frequency-changeable compressor be in reach warm stopped status time, as TC >=TC4, regulate frequency-changeable compressor to start, and to run with default low-limit frequency; Wherein TC2 < TC4 < TC1, TC4 are that refrigeration restarts threshold value.
4. the control method of convertible frequency air-conditioner according to claim 3, it is characterized in that, when convertible frequency air-conditioner heating operation, it is T1 ' that setting heats indoor environment temperature, in heating chamber, design temperature is TS ', described in the difference heated in indoor environment temperature and described heating chamber between design temperature be TC ', and TC '=TS '-T1 ', then when convertible frequency air-conditioner heating operation, step S3 comprises:
As TC ' >=TC5, frequency-changeable compressor is regulated to run with default highest frequency;
As TC6≤TC ' < TC5, reduce the running frequency of frequency-changeable compressor until preset low-limit frequency;
As TC7≤TC ' < TC6, reduce the rotating speed of indoor set DC fan until preset minimum speed;
As TC ' < TC7, regulate frequency-changeable compressor to reach temperature and shut down;
Wherein TC7 < TC6 < TC5, TC5 are the 5th threshold value, and TC6 is the 6th threshold value, and TC7 is the 7th threshold value.
5. the control method of convertible frequency air-conditioner according to claim 4, is characterized in that, frequency-changeable compressor be in reach warm stopped status time, as TC ' >=TC8, regulate frequency-changeable compressor to start, and to run with default low-limit frequency; Wherein TC6 < TC8 < TC5, TC8 restarts threshold value for heating.
6. a control system for convertible frequency air-conditioner, is characterized in that, comprises indoor environment temperature sensor, controller, frequency-changeable compressor and indoor set DC fan;
Described indoor environment temperature sensor is for gathering indoor environment temperature;
Described controller is for calculating the difference between indoor environment temperature and indoor design temperature; And regulate the running frequency of frequency-changeable compressor or the rotating speed of indoor set DC fan according to the difference between indoor environment temperature and indoor design temperature.
7. the control system of convertible frequency air-conditioner according to claim 6, it is characterized in that, when refrigerating of convertible frequency air conditioner runs, setting refrigeration indoor environment temperature is T1, in cool room, design temperature is TS, difference in refrigeration indoor environment temperature and cool room between design temperature is TC, and TC=T1-TS, the value of TC can just can be born, then when refrigerating of convertible frequency air conditioner runs, described controller regulates the rotating speed of the running frequency of described frequency-changeable compressor or described indoor set DC fan to be specially according to the difference in refrigeration indoor environment temperature and cool room between design temperature:
As TC >=TC1, described controller regulates described frequency-changeable compressor to run with default highest frequency;
As TC2≤TC < TC1, described controller controls described frequency-changeable compressor and reduces running frequency until preset low-limit frequency;
As TC3≤TC < TC2, the rotating speed that described controller controls described indoor set DC fan reduces until preset minimum speed;
As TC < TC3, described controller regulates described frequency-changeable compressor to reach temperature and shuts down;
Wherein TC3 < TC2 < TC1, TC1 are first threshold, and TC2 is Second Threshold, and TC3 is the 3rd threshold value.
8. the control system of convertible frequency air-conditioner according to claim 7, is characterized in that, described frequency-changeable compressor be in reach warm stopped status time, as TC >=TC4, described controller regulates described frequency-changeable compressor to start, and runs with default low-limit frequency; Wherein TC2 < TC4 < TC1, TC4 are that refrigeration restarts threshold value.
9. the control system of convertible frequency air-conditioner according to claim 8, it is characterized in that, when convertible frequency air-conditioner heating operation, it is T1 ' that setting heats indoor environment temperature, in heating chamber, design temperature is TS ', the difference heated in indoor environment temperature and heating chamber between design temperature is TC ', and TC '=TS '-T1 ', then when convertible frequency air-conditioner heating operation, described controller regulates the rotating speed of the running frequency of described frequency-changeable compressor or described indoor set DC fan to be specially according to the difference heated in indoor environment temperature and heating chamber between design temperature:
As TC ' >=TC5, described controller regulates described frequency-changeable compressor to run with default highest frequency;
As TC6≤TC ' < TC5, described controller controls described frequency-changeable compressor and reduces running frequency until preset low-limit frequency;
As TC7≤TC ' < TC6, the rotating speed that described controller controls described indoor set DC fan reduces until preset minimum speed;
As TC ' < TC7, described controller regulates described frequency-changeable compressor to reach temperature and shuts down;
Wherein TC7 < TC6 < TC5, TC5 are the 5th threshold value, and TC6 is the 6th threshold value, and TC7 is the 7th threshold value.
10. the control system of convertible frequency air-conditioner according to claim 9, is characterized in that, described frequency-changeable compressor be in reach warm stopped status time, as TC ' >=TC8, described controller regulates described frequency-changeable compressor to start, and runs with default low-limit frequency; Wherein TC6 < TC8 < TC5, TC8 restarts threshold value for heating.
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