CN102478296A - Control device of multi-connected central air conditioning system and control method thereof - Google Patents
Control device of multi-connected central air conditioning system and control method thereof Download PDFInfo
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- CN102478296A CN102478296A CN201010576222XA CN201010576222A CN102478296A CN 102478296 A CN102478296 A CN 102478296A CN 201010576222X A CN201010576222X A CN 201010576222XA CN 201010576222 A CN201010576222 A CN 201010576222A CN 102478296 A CN102478296 A CN 102478296A
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Abstract
The invention discloses a control device of a multi-connected central air conditioning system. The control device is provided with an outdoor unit and multiple indoor units, wherein an air pipe and a liquid pipe of the outdoor unit are connected with an air pipe branch and a liquid pipe branch of each indoor unit; an electronic expansion valve is arranged in the liquid pipe branch of each indoor unit; the control device is characterized by comprising a liquid pipe temperature sensor, a superheat degree detection module and a refrigeration opening regulation module, wherein the liquid pipe temperature sensor is used for detecting the liquid pipe temperature of each indoor unit; the superheat degree detection module is used for detecting the superheat degree; the refrigeration opening regulation module is used for regulating the opening of the electronic expansion valve in refrigeration, and comprises a first sub-module, a second sub-module and a third sub-module, wherein the first sub-module regulates the opening of the electronic expansion valve according to the first target temperature when the liquid pipe temperature is higher than or equal to the first target temperature; the second sub-module regulates the opening of the electronic expansion valve according to the second target temperature when the liquid pipe temperature is lower than or equal to the second target temperature; and the third sub-module regulates the opening of the electronic expansion valve according to the detected superheat degree when the liquid pipe temperature is higher than the second target temperature and lower than the first target temperature.
Description
Technical field
The present invention relates to a kind of control device and control method thereof that joins central air-conditioning more, relate in particular to the control of its indoor set.
Background technology
The multiple central air conditioner system is the air-conditioning system that is connected to form by an off-premises station and Duo Tai indoor set, mainly is installed on bigger indoor, space.In this multiple central air conditioner system,, can carry out temperature control independently to each room that indoor set is installed as required because the refrigeration or the heating capacity of indoor set can independently be adjusted.The refrigeration of indoor set or the control of heating capacity are to realize through the aperture that changes electric expansion valve.
In the prior art, during refrigeration, come the aperture of organic electronic expansion valve in the conditioning chamber according to the degree of superheat, and when heating, the aperture of regulating electric expansion valve according to the temperature of tracheae.
Because the distance between each indoor set and the off-premises station is also different, the internal resistance of pipeline is also also inequality.Particularly for being positioned at the terminal indoor set of refrigerating circulation, tend to because of the pipeline internal resistance excessively, cause cold medium flux to reduce, the temperature that tracheae and liquid pipe occur is than higher, and the lower phenomenon of the degree of superheat.At this moment, if only come the aperture of organic electronic expansion valve in the conditioning chamber according to the degree of superheat, the electric expansion valve of indoor set can not opened, and causes the refrigeration variation of indoor set.
And when heating, same for heating the terminal indoor set of circulation line because the increase of pipeline internal resistance or shunting are uneven, cause the temperature of tracheae higher.At this moment, the aperture of only regulating electric expansion valve according to the temperature of tracheae, the aperture of electric expansion valve will be very big, and heating effect is just poor.
Summary of the invention
In view of this; Main purpose of the present invention is to provide a kind of indoor set control system and control method thereof that joins central air-conditioning more; Even realizing because of reasons such as pipeline internal resistances, cold medium flux diminishes or when inhomogeneous, still can make indoor set that refrigeration or heating effect are preferably arranged.
Technical scheme 1: a kind of control device that join central air conditioner system more; Have single off-premises station and a plurality of indoor set, the tracheae of said off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of said indoor set with the liquid pipe, in the said liquid pipe branch pipe of said indoor set, is provided with electric expansion valve; The liquid pipe temperature sensor that comprises the liquid pipe temperature (TC2) that detects indoor set; Detect the degree of superheat detection module of the degree of superheat (SH), when refrigeration, the refrigeration aperture adjustment module that the aperture of said electric expansion valve is regulated; Said refrigeration aperture adjustment module; When being included in liquid pipe temperature (TC2), regulate the 1st submodule of electronic expansion valve opening, in liquid pipe temperature (TC2) during smaller or equal to the 2nd target temperature (TCm2) according to the 1st target temperature (TCm1) more than or equal to the 1st target temperature (TCm1); Regulate the 2nd submodule of electronic expansion valve opening according to the 2nd target temperature (TCm2); Greater than the 2nd target temperature (TCm2), and during less than the 1st target temperature (TCm1), regulate the 3rd submodule of electronic expansion valve opening according to the detected degree of superheat (SH) in liquid pipe temperature (TC2).
By on can know; Owing on each liquid pipe branch pipe, liquid pipe temperature sensor is set; Can accurately measure the temperature of liquid pipe, with exactly with liquid pipe temperature (TC2) and the 1st target temperature (TCm1) and the 2nd target temperature (TCm2) comparison, thereby the aperture of accurately controlling and regulating electric expansion valve.And when refrigeration, if liquid pipe temperature is less than the 1st target temperature (TCm1), during greater than the 2nd target temperature (TCm2); Regulate electronic expansion valve opening according to the detected degree of superheat (SH), if when liquid pipe temperature (TC2) is higher than the 1st target temperature (TCm1) or is lower than the 2nd target temperature (TCm2), the aperture of regulating electric expansion valve according to the 1st target temperature (TCm1) or the 2nd target temperature (TCm2) respectively; Therefore; Even for because of the pipeline internal resistance is bigger, the indoor set that cold medium flux is less, not can because of the temperature of tracheae and liquid pipe than higher; And the situation appearance that electric expansion valve is not opened appears, guaranteed the refrigeration of indoor set.Like this, the cold medium flux in each indoor set is well regulated, and the cold medium flux in also feasible many couplet central air-conditioning in each interior machine is balanced.
Technical scheme 2: according to technical scheme 1 described a kind of control device that join central air conditioner system more; The tracheae temperature sensor that also has the tracheae temperature (TC1) that detects indoor set; Said degree of superheat detection module, according to detected liquid pipe temperature (TC2) and tracheae temperature (TC1) through calculating the degree of superheat (SH).
Can be known that by technical scheme 2 the tracheae temperature sensor of indoor set can accurately measure the temperature of tracheae, then degree of superheat detection module comes out according to detected liquid pipe temperature and tracheae temperature computation, the value of the degree of superheat that calculates.
Technical scheme 3: according to technical scheme 1 described a kind of control device that join central air conditioner system more; Also has the external environment temperature sensor that detects external environment temperature (tao); Said the 3rd submodule; According to detected external environment temperature (tao) the target setting degree of superheat (SHm), regulate electronic expansion valve opening according to the detected degree of superheat (SH) and the difference of the target degree of superheat (SHm).
Can know by technical scheme 3; The external environment temperature sensor can accurately measure external environment temperature (tao); As the basis of the 3rd submodule, thereby regulate electronic expansion valve opening according to the detected degree of superheat (SH) and the difference of the target degree of superheat (SHm) according to outer shroud temperature (tao) the target setting degree of superheat (SHm).
Technical scheme 4: a kind of control device that join central air conditioner system more; Have single off-premises station and a plurality of indoor set, the tracheae of said off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of said indoor set with the liquid pipe, in the said liquid pipe branch pipe of said indoor set, is provided with electric expansion valve; Comprise the liquid pipe temperature sensor that detects indoor set liquid pipe temperature (TC2); Detect the tracheae temperature sensor of the tracheae temperature (TC1) of indoor set, when heating, heat the aperture adjustment module what the aperture of said electric expansion valve was regulated; The said aperture adjustment module that heats; In liquid pipe temperature (TC2) during, regulate the 1st submodule of electronic expansion valve opening according to the 1st target temperature (TCm1), in liquid pipe temperature (TC2) during smaller or equal to the 2nd target temperature (TCm2) more than or equal to the 1st target temperature (TCm1); Regulate the 2nd submodule of electronic expansion valve opening according to the 2nd target temperature (TCm2); Greater than the 2nd target temperature (TCm2), and during less than the 1st target temperature (TCm1), regulate the 3rd submodule of electronic expansion valve opening according to detected tracheae temperature (TC1) in liquid pipe temperature (TC2).
By on can find out; Owing to be provided with tracheae temperature sensor and liquid pipe temperature sensor; When heating; If liquid pipe temperature (TC2) is greater than the 2nd target temperature (TCm2), and during less than the 1st target temperature (TCm1), regulate electronic expansion valve opening according to detected tracheae temperature (TC1); And liquid pipe temperature (TC2) is regulated electronic expansion valve opening according to the 1st target temperature (TCm1) or the 2nd target temperature (TCm2) respectively during more than or equal to the 1st target temperature (TCm1) or smaller or equal to the 2nd target temperature (TCm2).Therefore, even for because of the pipeline internal resistance is bigger, cold medium flux is less or distribute irregular indoor set, not can because of the tracheae temperature than higher, and the excessive situation of aperture that electric expansion valve occurs occurs, and has guaranteed the heating effect of indoor set.
Technical scheme 5: according to technical scheme 4 described a kind of control device that join central air conditioner system more; The high pressure sensor that also has the liquid pipe pressure (Pb) that detects said off-premises station; Said the 3rd submodule; According to detected off-premises station liquid pipe pressure (Pb) target setting tracheae temperature (TCm), regulate electronic expansion valve opening according to the detected tracheae temperature (TC1) and the difference of target tracheae temperature (TCm).
Can know by technical scheme 5; The place is provided with high pressure sensor at off-premises station; Can accurately and timely measure the liquid pipe pressure (Pb) of off-premises station; As the basis of off-premises station target setting tracheae temperature (TCm), can regulate electronic expansion valve opening according to the detected tracheae temperature (TC1) and the difference of target tracheae temperature (TCm) more accurately, control more flexible.
Technical scheme 6: a kind of control methods that join central air conditioner system more, the said central air conditioner systems that join have single off-premises station and a plurality of indoor set more, and the tracheae of said off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of said indoor set with the liquid pipe; In the said liquid pipe branch pipe of said indoor set, be provided with electric expansion valve; When refrigeration, comprise the step that detects indoor set liquid pipe temperature (TC2), detect the step of indoor set tracheae temperature (TC1); Detect the step of the degree of superheat (SH); The step that the size of liquid pipe temperature (TC2) and target temperature (TCm1) is compared, in liquid pipe temperature (TC2) during more than or equal to the 1st target temperature (TCm1), the step of regulating electronic expansion valve opening according to the 1st target temperature (TCm1); The step that the size of liquid pipe temperature (TC2) and the 2nd target temperature (TCm2) is compared; In liquid pipe temperature (TC2) during smaller or equal to the 2nd target temperature (TCm2), the step of regulating electronic expansion valve opening according to the 2nd target temperature (TCm2), in liquid pipe temperature (TC2) greater than the 2nd target temperature (TCm2); During less than the 1st target temperature (TCm1), regulate the step of electronic expansion valve opening according to the degree of superheat (SH).
Technical scheme 7: a kind of control methods that join central air conditioner system more; The said central air conditioner system that joins has single off-premises station and a plurality of indoor set more, and the tracheae of said off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of said indoor set with the liquid pipe, in the said liquid pipe branch pipe of said indoor set, is provided with electric expansion valve; When heating; Comprise the step that detects indoor set liquid pipe temperature (TC2), detect the step of indoor set tracheae temperature (TC1), the step that the size of liquid pipe temperature (TC2) and target temperature (TCm1) is compared; In liquid pipe temperature (TC2) during more than or equal to the 1st target temperature (TCm1); The step of regulating electronic expansion valve opening according to the 1st target temperature (TCm1), the step that the size of liquid pipe temperature (TC2) and the 2nd target temperature (TCm2) is compared is in liquid pipe temperature (TC2) during smaller or equal to the 2nd target temperature (TCm2); Regulate the step of electronic expansion valve opening according to the 2nd target temperature (TCm2); Greater than the 2nd target temperature (TCm2), during less than the 1st target temperature (TCm1), regulate the step of electronic expansion valve opening according to indoor set tracheae temperature (TC1) in liquid pipe temperature (TC2).
Can know by technical scheme 6 and technical scheme 7; The central air-conditioning that join when freezing or heating more; If when liquid pipe temperature is higher than the maximum temperature (the 1st target temperature) of setting or is lower than the minimum temperature (the 2nd target temperature) of setting, regulate electric expansion valve according to maximum temperature (the 1st target temperature) or minimum temperature (the 2nd target temperature).Through above technical scheme control multiple central air-conditioning; Can effectively solve in kind of refrigeration cycle or heat the terminal indoor set of circulation line causes temperature that cold medium flux reduces to cause tracheae and liquid pipe than higher because of the pipeline internal resistance; The situation that electric expansion valve is not opened occurs; Guaranteed the refrigeration or the heating effect of each indoor set, and made that the cold medium flux of each indoor set is balanced.
Description of drawings
Fig. 1 is that the central air conditioner systems that join connect sketch map more;
Fig. 2 is the central air-conditioning process of refrigerastion sketch mapes that join more;
Fig. 3 is the central air-conditioning concrete grammar sketch mapes according to the target degree of superheat (SHm) adjusting electric expansion valve in process of refrigerastion that join more;
Fig. 4 heats the process sketch map for the central air-conditioning that join more;
Fig. 5 is the central air-conditioning concrete grammar sketch mapes according to target tracheae temperature (TCm) adjusting electric expansion valve in the process of heating that join more.
The reference numeral explanation
The 1-off-premises station; The 2-pressure sensor; The 3-exhaust outlet of compressor; 4-external environment temperature sensor; The 5-tracheae; 51,52,53-tracheorrhaphy manifold; 6-liquid pipe; 61,62,63-liquid pipe branch pipe; 71,72,73-tracheae temperature sensor; 81,82,83-liquid pipe temperature sensor; 91,92,93-electric expansion valve; 101,102,103-indoor set.
The specific embodiment
According to specific embodiment control device and the control method thereof that joins central air-conditioning of the present invention is described more below.
Fig. 1 connects sketch map for the present invention joins central air conditioner system more; The control device that joins central air conditioner system as can be seen from the figure of the present invention more; Have single off-premises station 1 and 3 indoor sets (101,102,103); Be connected in parallel between indoor set 101, indoor set 102 and the indoor set 103, be connected in series between the indoor set (101,102,103) of parallel connection and the off-premises station 1.Exhaust outlet 3 at the compressor of off-premises station 1 is provided with pressure sensor 2.The setting of this pressure sensor can accurately measure the high-pressure Pb of off-premises station 1.
The tracheae 5 of off-premises station 1 be connected to indoor one with the common common pipe of tracheae of tracheae 5 on; Liquid pipe 6 be connected to indoor one with the common common pipe of liquid pipe of liquid pipe 6 on; The tracheorrhaphy manifold (51,52,53) of indoor set (101,102,103) is connected to the common pipe of tracheae, and the liquid pipe branch pipe (61,62,63) of indoor set (101,102,103) is connected on the common pipe of liquid pipe.On the tracheorrhaphy manifold (51,52,53) of indoor set (101,102,103), be separately installed with tracheae temperature sensor (71,72,73), on the liquid pipe branch pipe (61,62,63) of indoor set (101,102,103), be separately installed with liquid pipe temperature sensor (81,82,83) and electric expansion valve (91,92,93) simultaneously
The tracheae temperature sensor (71,72,73) and the liquid pipe temperature sensor (81,82,83) of above-described each indoor set (101,102,103) can accurately detect tracheae temperature (TC1) and liquid pipe temperature (TC2).This multiple central air conditioner system also has the control module (not shown in figure 1); This control module comprises the degree of superheat detection module that detects the degree of superheat (SH); Said degree of superheat detection module is the computing module that calculates the value of the degree of superheat (SH) according to detected liquid pipe temperature (TC2) and tracheae temperature (TC1).
Control module in this multiple central air conditioner system also comprises refrigeration aperture adjustment module (not shown in figure 1), and this refrigeration aperture adjustment module is used for when refrigeration, the aperture of electric expansion valve (91,92,93) being regulated.This refrigeration aperture adjustment module comprises 3 sub-module.The 1st submodule is during more than or equal to the 1st target temperature (TCm1), to regulate the module of electronic expansion valve opening in liquid pipe temperature (TC2) according to the 1st target temperature (TCm1); The 2nd submodule is during smaller or equal to the 2nd target temperature (TCm2), to regulate the module of electric expansion valve (91,92,93) aperture in liquid pipe temperature (TC2) according to the 2nd target temperature (TCm2); The 3rd submodule be in liquid pipe temperature (TC2) greater than the 2nd target temperature (TCm2), and during less than the 1st target temperature (TCm1), regulate the module of electric expansion valve (91,92,93) aperture according to the detected degree of superheat (SH).
Said the 1st target temperature (TCm1) and the 2nd target temperature (TCm2) can be obtained through experiment.Promptly; Through experiment; Confirm that the degree of superheat (SH) is less; When the aperture of electric expansion valve (91,92,93) is zero, the highest and minimum liquid pipe temperature (TC2), and high and minimum determined liquid pipe temperature (TC2) is stored in the not shown control module as the 1st target temperature (TCm1) and the 2nd target temperature (TCm2).
Fig. 2 is the central air-conditioning refrigeration control procedure sketch mapes that join more; As shown in the figure, a kind of control methods that join central air conditioner system when refrigeration more; At first detect the liquid pipe temperature (TC2) of indoor set (101,102,103) by liquid pipe temperature sensor (81,82,83); In step S10, the size of liquid pipe temperature (TC2) and the 1st target temperature (TCm1) is compared, in liquid pipe temperature (TC2) during more than or equal to the 1st target temperature (TCm1); Get into step S20, regulate electric expansion valve (91,92,93) aperture according to the 1st target temperature (TCm1).Get into step S30 afterwards; The size of liquid pipe temperature (TC2) with the 2nd target temperature (TCm2) compared; During smaller or equal to the 2nd target temperature (TCm2), get into step S40 in liquid pipe temperature (TC2), regulate electric expansion valve (91,92,93) aperture according to the 2nd target temperature (TCm2).If the comparative result of step S10 and S30 is; Liquid pipe temperature (TC2) is greater than the 2nd target temperature (TCm2); Or less than the 1st target temperature (TCm1), that is, liquid pipe temperature (TC2) is between the 1st target temperature (TCm1) and the 2nd target temperature (TCm2) time; Get into step S50, regulate the aperture of electric expansion valve (91,92,93) according to the degree of superheat (SH).
According to Fig. 3 the central air-conditioning idiographic flows according to the target degree of superheat (SHm) adjusting electric expansion valve (91,92,93) in process of refrigerastion that join are described more below.At first at step S51; Detect external environment temperature (tao) numerical value by external environment temperature sensor 4; At step S 52, by said the 3rd submodule, according to detected external environment temperature (tao) the target setting degree of superheat (SHm); At step S53; The degree of superheat (SH) that is calculated according to detected tracheae temperature (TC1) and liquid pipe temperature (TC2) by degree of superheat detection module, and according to the aperture that this degree of superheat (SH) and the difference of the target degree of superheat (SHm) are regulated electric expansion valve (91,92,93) makes the degree of superheat (SH) level off to the target degree of superheat (SHm).
Shown in Figure 4 for how the couplet central air-conditioning heat flow process.The 1st target temperature (TCm1) when heating and the 2nd target temperature (TCm2) can be same with when refrigeration, confirm in advance through experiment.
As shown in the figure; When heating, at first detect the liquid pipe temperature (TC2) of indoor set (101,102,103), at step S1; The size of liquid pipe temperature (TC2) with the 1st target temperature (TCm1) compared; During more than or equal to the 1st target temperature (TCm1), get into step S2 in liquid pipe temperature (TC2), regulate electric expansion valve (91,92,93) aperture according to the 1st target temperature (TCm1); At step S3; The size of liquid pipe temperature (TC2) with the 2nd target temperature (TCm2) compared; During smaller or equal to the 2nd target temperature (TCm2), get into step S4 in liquid pipe temperature (TC2), regulate electronic expansion valve opening (91,92,93) according to the 2nd target temperature (TCm2); If the comparative result of step S1 and S3 is; Liquid pipe temperature (TC2) is greater than the 2nd target temperature (TCm2); Or during less than the 1st target temperature (TCm1); Get into step S5, detect the tracheae temperature (TC1) of indoor set (101,102,103), regulate the aperture of electric expansion valve (91,92,93) according to tracheae temperature (TC1).
Specify the central air-conditioning concrete grammars according to target tracheae temperature (TCm) adjusting electric expansion valve in the process of heating that join according to Fig. 5 below more.As shown in the figure, when heating, at step S61; By liquid pipe pressure (Pb) numerical value of the said off-premises station 1 of high pressure sensor 2 detections, at step S62, by said the 3rd submodule; According to detected off-premises station 1 liquid pipe pressure (Pb) target setting tracheae temperature (TCm); At step S63,, make tracheae temperature (TC1) level off to target tracheae temperature (TCm) according to the aperture that the difference of detected tracheae temperature (TC1) and target tracheae temperature (TCm) is regulated electric expansion valve (91,92,93).
By on can know; The control device of the many couplet central air-conditioning in this embodiment when refrigeration control, is not only regulated the aperture of electric expansion valve (91,92,93) according to the degree of superheat; Also in liquid pipe temperature (TC2) during more than or equal to the 1st target temperature (TCm1) or smaller or equal to the 2nd target temperature (TCm2); According to the 1st target temperature (TCm1) and the 2nd target temperature (TCm2) aperture of electric expansion valve (91,92,93) is regulated, so, even bigger for the pipeline internal resistance; The indoor set that cold medium flux is less also can guarantee its refrigeration.
When heating control; Not only the aperture of electric expansion valve (91,92,93) is regulated, also during more than or equal to the 1st target temperature (TCm1) or smaller or equal to the 2nd target temperature (TCm2), the aperture of electric expansion valve (91,92,93) is regulated according to the 1st target temperature (TCm1) and the 2nd target temperature (TCm2) in liquid pipe temperature (TC2) according to the tracheae temperature; So; Even the indoor set bigger for the pipeline internal resistance, that cold medium flux is less also can guarantee its heating effect.
More than the 1st target temperature (TCm1) in when refrigeration and the 2nd target temperature (TCm2) the 1st target temperature (TCm1) and the 2nd target temperature (TCm2) when heating can be identical value, also different values.
The above is merely preferred embodiment of the present invention; Not in order to restriction the present invention; All within spirit of the present invention and principle; Any modification of being done, be equal to replacement, improvement etc.,, all should be included within protection scope of the present invention as suitable equally for the system that has only refrigeration or only heat.
Claims (7)
1. the control device that joins central air conditioner system one kind more; Have single off-premises station and a plurality of indoor set; The tracheae of said off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of said indoor set with the liquid pipe; In the said liquid pipe branch pipe of said indoor set, be provided with electric expansion valve, it is characterized in that
The liquid pipe temperature sensor that comprises the liquid pipe temperature (TC2) that detects indoor set, the degree of superheat detection module of detection degree of superheat SH,
When refrigeration; To the refrigeration aperture adjustment module that the aperture of said electric expansion valve is regulated, said refrigeration aperture adjustment module is when being included in liquid pipe temperature (TC2) more than or equal to the 1st target temperature (TCm1); Regulate the 1st submodule of electronic expansion valve opening according to the 1st target temperature (TCm1); In liquid pipe temperature (TC2) during smaller or equal to the 2nd target temperature (TCm2), regulate the 2nd submodule of electronic expansion valve opening according to the 2nd target temperature (TCm2), in liquid pipe temperature (TC2) greater than the 2nd target temperature (TCm2); And during less than the 1st target temperature (TCm1), regulate the 3rd submodule of electronic expansion valve opening according to the detected degree of superheat (SH).
2. a kind of control device that join central air conditioner system according to claim 1 more; It is characterized in that; The tracheae temperature sensor that also has the tracheae temperature (TC1) that detects indoor set; Said degree of superheat detection module, according to detected liquid pipe temperature (TC2) and tracheae temperature (TC1) through calculating the degree of superheat (SH).
3. a kind of control device that join central air conditioner system according to claim 1 is characterized in that more,
Also has the external environment temperature sensor that detects external environment temperature (tao); Said the 3rd submodule; According to detected external environment temperature (tao) the target setting degree of superheat (SHm), regulate electronic expansion valve opening according to the detected degree of superheat (SH) and the difference of the target degree of superheat (SHm).
4. the control device that joins central air conditioner system one kind more; Have single off-premises station and a plurality of indoor set; The tracheae of said off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of said indoor set with the liquid pipe; In the said liquid pipe branch pipe of said indoor set, be provided with electric expansion valve, it is characterized in that
Comprise the liquid pipe temperature sensor that detects indoor set liquid pipe temperature (TC2), detect the tracheae temperature sensor of the tracheae temperature (TC1) of indoor set,
When heating; Heat the aperture adjustment module to what the aperture of said electric expansion valve was regulated, the said aperture adjustment module that heats is in liquid pipe temperature (TC2) during more than or equal to the 1st target temperature (TCm1); Regulate the 1st submodule of electronic expansion valve opening according to the 1st target temperature (TCm1); In liquid pipe temperature (TC2) during smaller or equal to the 2nd target temperature (TCm2), regulate the 2nd submodule of electronic expansion valve opening according to the 2nd target temperature (TCm2), in liquid pipe temperature (TC2) greater than the 2nd target temperature (TCm2); And during less than the 1st target temperature (TCm1), regulate the 3rd submodule of electronic expansion valve opening according to detected tracheae temperature (TC1).
5. a kind of control device that join central air conditioner system according to claim 4 is characterized in that more,
The high pressure sensor that also has the liquid pipe pressure (Pb) that detects said off-premises station; Said the 3rd submodule; According to detected off-premises station liquid pipe pressure (Pb) target setting tracheae temperature (TCm), regulate electronic expansion valve opening according to the detected tracheae temperature (TC1) and the difference of target tracheae temperature (TCm).
6. the control method that joins central air conditioner system one kind more; The said central air conditioner system that joins has single off-premises station and a plurality of indoor set more; The tracheae of said off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of said indoor set with the liquid pipe; In the said liquid pipe branch pipe of said indoor set, be provided with electric expansion valve, it is characterized in that
When refrigeration, comprise the step that detects indoor set liquid pipe temperature (TC2), detect the step of indoor set tracheae temperature (TC1); Detect the step of the degree of superheat (SH); The step that the size of liquid pipe temperature (TC2) and target temperature (TCm1) is compared, in liquid pipe temperature (TC2) during more than or equal to the 1st target temperature (TCm1), the step of regulating electronic expansion valve opening according to the 1st target temperature (TCm1); The step that the size of liquid pipe temperature (TC2) and the 2nd target temperature (TCm2) is compared; In liquid pipe temperature (TC2) during smaller or equal to the 2nd target temperature (TCm2), the step of regulating electronic expansion valve opening according to the 2nd target temperature (TCm2), in liquid pipe temperature (TC2) greater than the 2nd target temperature (TCm2); During less than the 1st target temperature (TCm1), regulate the step of electronic expansion valve opening according to the degree of superheat (SH).
7. the control method that joins central air conditioner system one kind more; The said central air conditioner system that joins has single off-premises station and a plurality of indoor set more; The tracheae of said off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of said indoor set with the liquid pipe; In the said liquid pipe branch pipe of said indoor set, be provided with electric expansion valve, it is characterized in that
When heating; Comprise the step that detects indoor set liquid pipe temperature (TC2), detect the step of indoor set tracheae temperature (TC1), the step that the size of liquid pipe temperature (TC2) and target temperature (TCm1) is compared; In liquid pipe temperature (TC2) during more than or equal to the 1st target temperature (TCm1); The step of regulating electronic expansion valve opening according to the 1st target temperature (TCm1), the step that the size of liquid pipe temperature (TC2) and the 2nd target temperature (TCm2) is compared is in liquid pipe temperature (TC2) during smaller or equal to the 2nd target temperature (TCm2); Regulate the step of electronic expansion valve opening according to the 2nd target temperature (TCm2); Greater than the 2nd target temperature (TCm2), during less than the 1st target temperature (TCm1), regulate the step of electronic expansion valve opening according to indoor set tracheae temperature (TC1) in liquid pipe temperature (TC2).
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107975920A (en) * | 2017-11-27 | 2018-05-01 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and multi-line system |
| CN111486560A (en) * | 2020-04-21 | 2020-08-04 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
| CN111928416A (en) * | 2020-08-18 | 2020-11-13 | 宁波奥克斯电气股份有限公司 | Temperature sensing bulb corresponding relation determining method and device and air conditioner |
| CN112361473A (en) * | 2020-11-16 | 2021-02-12 | 南京天加环境科技有限公司 | Air conditioning system combining multi-split air conditioner and cold and hot water unit and control method thereof |
| CN112378035A (en) * | 2020-10-29 | 2021-02-19 | 四川虹美智能科技有限公司 | Sampling value processing method and device for air conditioner temperature sensor |
| CN113959054A (en) * | 2021-10-12 | 2022-01-21 | 珠海格力电器股份有限公司 | Control method for preventing overheating of multi-split evaporator and multi-split air conditioner |
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| CN104006445A (en) * | 2013-02-26 | 2014-08-27 | 珠海格力电器股份有限公司 | Multi-linkage air conditioner and control method thereof |
| CN104006445B (en) * | 2013-02-26 | 2017-04-12 | 珠海格力电器股份有限公司 | Multi-linkage air conditioner and control method thereof |
| CN107975920A (en) * | 2017-11-27 | 2018-05-01 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and multi-line system |
| CN107975920B (en) * | 2017-11-27 | 2020-01-24 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and multi-split system |
| CN111486560A (en) * | 2020-04-21 | 2020-08-04 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
| CN111486560B (en) * | 2020-04-21 | 2021-04-30 | 海信（山东）空调有限公司 | Air conditioner and control method thereof |
| CN111928416A (en) * | 2020-08-18 | 2020-11-13 | 宁波奥克斯电气股份有限公司 | Temperature sensing bulb corresponding relation determining method and device and air conditioner |
| CN111928416B (en) * | 2020-08-18 | 2021-10-19 | 宁波奥克斯电气股份有限公司 | Temperature sensing bulb corresponding relation determining method and device and air conditioner |
| CN112378035A (en) * | 2020-10-29 | 2021-02-19 | 四川虹美智能科技有限公司 | Sampling value processing method and device for air conditioner temperature sensor |
| CN112361473A (en) * | 2020-11-16 | 2021-02-12 | 南京天加环境科技有限公司 | Air conditioning system combining multi-split air conditioner and cold and hot water unit and control method thereof |
| CN113959054A (en) * | 2021-10-12 | 2022-01-21 | 珠海格力电器股份有限公司 | Control method for preventing overheating of multi-split evaporator and multi-split air conditioner |
| CN113959054B (en) * | 2021-10-12 | 2022-12-13 | 珠海格力电器股份有限公司 | Control method for preventing overheating of multi-split evaporator and multi-split air conditioner |
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