CN202092280U - Controlling device of multi-unit central air-conditioning system - Google Patents
Controlling device of multi-unit central air-conditioning system Download PDFInfo
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- CN202092280U CN202092280U CN2010206267206U CN201020626720U CN202092280U CN 202092280 U CN202092280 U CN 202092280U CN 2010206267206 U CN2010206267206 U CN 2010206267206U CN 201020626720 U CN201020626720 U CN 201020626720U CN 202092280 U CN202092280 U CN 202092280U
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Abstract
Provided is a controlling device of a multi-unit central air-conditioning system including a single outdoor unit and a plurality of indoor units, the air pipe and liquid pipe of the outdoor unit are connected to the branch pipes of the air pipes and the branch pipes of the liquid pipes of the indoor units, an electronic expansion valve is arranged in the branch pipe of the liquid pipe of each indoor unit. The controlling device is characterized by including a liquid pipe temperature sensor for detecting the liquid pipe temperature of the indoor units, an overheating detection module for detecting the overheating degree, and a refrigeration opening degree adjusting module for adjusting the opening degree of the electronic expansion valves during refrigeration; the refrigeration opening degree adjusting module includes a first sub-module which adjusts the opening degree of the electronic expansion valves based on the first target temperature when the liquid pipe temperature is higher than or equal to the first target temperature, a second sub-module which adjusts the opening degree of the electronic expansion valves based on the second target temperature when the liquid pipe temperature is lower than or equal to the second target temperature, and a third sub-module which adjusts the opening degree of the electronic expansion valves based on the detected overheating degree when the liquid pipe temperature is higher than the second target temperature and lower than the first target temperature.
Description
Technical field
The utility model relates to a kind of control device of multi-joint central air-conditioning, relates 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 by 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 the indoor set that is positioned at the refrigerating circulation end, 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 the indoor set that heats the circulation line end because the increase of pipeline internal resistance or shunting are uneven, cause the temperature of tracheae higher.At this moment, the aperture of regulating electric expansion valve only according to the temperature of tracheae, the aperture of electric expansion valve will be very big, and heating effect is just poor.
The utility model content
In view of this, main purpose of the present utility model is to provide a kind of indoor set control system of multi-joint central air-conditioning, 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 of multi-joint central air conditioner system, have single off-premises station and a plurality of indoor set, the tracheae of described off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of described indoor set with the liquid pipe, in the described liquid pipe branch pipe of described indoor set, be 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 described electric expansion valve is regulated, described refrigeration aperture adjustment module, 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).
As from the foregoing, 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), when if 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 respectively according to the 1st target temperature (TCm1) or the 2nd target temperature (TCm2), therefore, even for because of the pipeline internal resistance bigger, the indoor set that cold medium flux is less, not can because of the temperature of tracheae and liquid pipe than higher, occur and the situation that electric expansion valve do not open occurs, guaranteed the refrigeration of indoor set.Like this, the cold medium flux in each indoor set is well regulated, and also makes in the multi-joint central air-conditioning cold medium flux equilibrium in machine in each.
Technical scheme 2: according to the control device of technical scheme 1 described a kind of multi-joint central air conditioner system, the tracheae temperature sensor that also has the tracheae temperature (TC1) that detects indoor set, described degree of superheat detection module, according to detected liquid pipe temperature (TC2) and tracheae temperature (TC1) by calculating the degree of superheat (SH).
By technical scheme 2 as can be known, the tracheae temperature sensor of indoor set can accurately measure the temperature of tracheae, and 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 the control device of technical scheme 1 described a kind of multi-joint central air conditioner system, also has the external environment temperature sensor that detects external environment temperature (tao), described 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).
By technical scheme 3 as can be known, 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 of multi-joint central air conditioner system, have single off-premises station and a plurality of indoor set, the tracheae of described off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of described indoor set with the liquid pipe, in the described liquid pipe branch pipe of described indoor set, be 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 to what the aperture of described electric expansion valve was regulated, the described aperture adjustment module that heats, 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).
As seen from the above, 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 the control device of technical scheme 4 described a kind of multi-joint central air conditioner systems, the high pressure sensor that also has the liquid pipe pressure (Pb) that detects described off-premises station, described 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).
By technical scheme 5 as can be known, 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, basis as 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.
Description of drawings
Fig. 1 is multi-joint central air conditioner system connection diagram;
Fig. 2 is multi-joint central air-conditioning process of refrigerastion schematic diagram;
Fig. 3 is multi-joint central air-conditioning is regulated electric expansion valve according to the target degree of superheat (SHm) in process of refrigerastion a concrete grammar schematic diagram;
Fig. 4 heats the process schematic diagram for multi-joint central air-conditioning;
Fig. 5 regulates the concrete grammar schematic diagram of electric expansion valve according to target tracheae temperature (TCm) in the process of heating for multi-joint central air-conditioning.
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
The control device of multi-joint central air-conditioning of the present utility model is described according to specific embodiment below.
Fig. 1 is the multi-joint central air conditioner system connection diagram of the utility model, the as can be seen from the figure control device of multi-joint central air conditioner system of the present utility model, 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 indoor set (101,102,103) in parallel 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 is connected on the common common pipe of liquid pipe of indoor and liquid pipe 6, 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), described 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 submodules.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).
Described the 1st target temperature (TCm1) and the 2nd target temperature (TCm2) can be obtained by experiment.Promptly, by experiment, determine 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 multi-joint central air-conditioning refrigeration control procedure schematic diagram, as shown in the figure, a kind of control method of multi-joint central air conditioner system, when refrigeration, at first detect the liquid pipe temperature (TC2) of indoor set (101,102,103) by liquid pipe temperature sensor (81,82,83), in step S 10, the size of liquid pipe temperature (TC2) with the 1st target temperature (TCm1) compared, in liquid pipe temperature (TC2) during more than or equal to the 1st target temperature (TCm1), enter step S20, regulate electric expansion valve (91,92,93) aperture according to the 1st target temperature (TCm1).Enter 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), enter 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), promptly, liquid pipe temperature (TC2) is between the 1st target temperature (TCm1) and the 2nd target temperature (TCm2) time, enter step S50, regulate the aperture of electric expansion valve (91,92,93) according to the degree of superheat (SH).
According to Fig. 3 multi-joint central air-conditioning idiographic flow according to the target degree of superheat (SHm) adjusting electric expansion valve (91,92,93) in process of refrigerastion is described below.At first at step S51, detect external environment temperature (tao) numerical value by external environment temperature sensor 4, at step S52, by described 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 calculates according to detected tracheae temperature (TC1) and liquid pipe temperature (TC2) by degree of superheat detection module, and, make the degree of superheat (SH) level off to the target degree of superheat (SHm) according to the aperture that the difference of this degree of superheat (SH) and the target degree of superheat (SHm) is regulated electric expansion valve (91,92,93).
Figure 4 shows that multi-joint central air-conditioning heats flow process.The 1st target temperature (TCm1) when heating and the 2nd target temperature (TCm2) can be same with when refrigeration, pre-determine by 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), enter 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), enter 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), enter 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 multi-joint central air-conditioning is regulated electric expansion valve according to target tracheae temperature (TCm) in the process of heating concrete grammar according to Fig. 5 below.As shown in the figure, when heating, at step S61, by liquid pipe pressure (Pb) numerical value of the described off-premises station 1 of high pressure sensor 2 detections, at step S62, by described 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).
As from the foregoing, the control device of the multi-joint central air-conditioning in the present embodiment, when refrigeration control, not only the aperture of electric expansion valve (91,92,93) is regulated 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 it is 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 according to the tracheae temperature, 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 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 only is preferred embodiment of the present utility model; not in order to restriction the utility model; all within spirit of the present utility model and principle; any modification of being done, be equal to replacement, improvement etc.; as suitable equally, all should be included within the protection domain of the present utility model for the system that has only refrigeration or only heat.
Claims (5)
1. the control device of a multi-joint central air conditioner system, have single off-premises station and a plurality of indoor set, the tracheae of described off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of described indoor set with the liquid pipe, in the described liquid pipe branch pipe of described indoor set, be provided with electric expansion valve, it is characterized in that
The liquid pipe temperature sensor that comprises the liquid pipe temperature T C2 that detects indoor set, the degree of superheat detection module of detection degree of superheat SH,
When refrigeration, the refrigeration aperture adjustment module that the aperture of described electric expansion valve is regulated, described refrigeration aperture adjustment module, when being included in liquid pipe temperature T C2 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, at liquid pipe temperature T C2 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, at liquid pipe temperature T C2 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 degree of superheat SH.
2. the control device of a kind of multi-joint central air conditioner system according to claim 1, it is characterized in that, the tracheae temperature sensor that also has the tracheae temperature T C1 that detects indoor set, described degree of superheat detection module, according to detected liquid pipe temperature T C2 and tracheae temperature T C1 by calculating degree of superheat SH.
3. the control device of a kind of multi-joint central air conditioner system according to claim 1 is characterized in that,
Also has the external environment temperature sensor that detects external environment temperature t ao, described the 3rd submodule, according to detected external environment temperature t ao target setting degree of superheat SHm, regulate electronic expansion valve opening according to the difference of detected degree of superheat SH and target degree of superheat SHm.
4. the control device of a multi-joint central air conditioner system, have single off-premises station and a plurality of indoor set, the tracheae of described off-premises station is connected with liquid pipe branch pipe with the tracheorrhaphy manifold of described indoor set with the liquid pipe, in the described liquid pipe branch pipe of described 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 T C2, detect the tracheae temperature sensor of the tracheae temperature T C1 of indoor set,
When heating, heat the aperture adjustment module to what the aperture of described electric expansion valve was regulated, the described aperture adjustment module that heats, at liquid pipe temperature T C2 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, at liquid pipe temperature T C2 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, at liquid pipe temperature T C2 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 T C1.
5. the control device of a kind of multi-joint central air conditioner system according to claim 4 is characterized in that,
The high pressure sensor that also has the liquid pipe pressure Pb that detects described off-premises station, described the 3rd submodule, according to detected off-premises station liquid pipe pressure Pb target setting tracheae temperature T Cm, regulate electronic expansion valve opening according to the difference of detected tracheae temperature T C1 and target tracheae temperature T Cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206267206U CN202092280U (en) | 2010-11-24 | 2010-11-24 | Controlling device of multi-unit central air-conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206267206U CN202092280U (en) | 2010-11-24 | 2010-11-24 | Controlling device of multi-unit central air-conditioning system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478296A (en) * | 2010-11-24 | 2012-05-30 | 海尔集团公司 | Control device of multi-connected central air conditioning system and control method thereof |
| CN103954018A (en) * | 2014-03-24 | 2014-07-30 | 美的集团股份有限公司 | Air conditioner, air conditioner system and air conditioner control method |
| CN104246388A (en) * | 2012-04-16 | 2014-12-24 | 大金工业株式会社 | Air conditioner |
| 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 |
-
2010
- 2010-11-24 CN CN2010206267206U patent/CN202092280U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478296A (en) * | 2010-11-24 | 2012-05-30 | 海尔集团公司 | Control device of multi-connected central air conditioning system and control method thereof |
| CN102478296B (en) * | 2010-11-24 | 2014-04-09 | 海尔集团公司 | Control device of multi-connected central air conditioning system and control method thereof |
| CN104246388A (en) * | 2012-04-16 | 2014-12-24 | 大金工业株式会社 | Air conditioner |
| CN104246388B (en) * | 2012-04-16 | 2016-01-20 | 大金工业株式会社 | Air conditioner |
| CN103954018A (en) * | 2014-03-24 | 2014-07-30 | 美的集团股份有限公司 | Air conditioner, air conditioner system and air conditioner control method |
| CN103954018B (en) * | 2014-03-24 | 2017-09-22 | 美的集团股份有限公司 | The control method of air conditioner, air-conditioner system and air conditioner |
| 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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