CN101915450A - Multi-online indoor machine wind side bypass content control method and device thereof - Google Patents

Multi-online indoor machine wind side bypass content control method and device thereof Download PDF

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Publication number
CN101915450A
CN101915450A CN 201010255267 CN201010255267A CN101915450A CN 101915450 A CN101915450 A CN 101915450A CN 201010255267 CN201010255267 CN 201010255267 CN 201010255267 A CN201010255267 A CN 201010255267A CN 101915450 A CN101915450 A CN 101915450A
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wind
air
bypass
control
heat exchanger
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CN 201010255267
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CN101915450B (en
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江亿
夏建军
涂壤
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Tsinghua University
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Tsinghua University
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Abstract

The invention relates to a multi-online indoor machine wind side bypass content control method and a device thereof. The method comprises the following steps of: (1) mounting a fan, a heat exchanger, a wind side electric bypass air valve and an electronic expansion valve in an indoor machine; (2) under the refrigerating condition, by the opening combination adjustment of the wind side electric bypass air valve and the electronic expansion valve, when a room load is increased, reducing the opening of the wind side electric bypass air valve and increasing the opening of the electronic expansion valve; when the room load is reduced, increasing the opening of the wind side electric bypass air valve and reducing the opening of the electronic expansion valve; (3) under the heating condition, by the opening combination adjustment of the wind side electric bypass air valve and the electronic expansion valve, when the room load is increased, reducing the opening of the wind side electric bypass air valve and increasing the opening of the electronic expansion valve; and when the room load is reduced, increasing the opening of the wind side electric bypass air valve and reducing the opening of the electronic expansion valve. The invention has simple control and higher stability of system running and can be widely applied to various multi-online systems in the field of heating ventilation air conditioners.

Description

A kind of multi-online indoor machine wind side bypass content control method and device thereof
Technical field
The present invention relates to control method and device in a kind of field of heating ventilation air conditioning, particularly about a kind of multi-online indoor machine wind side bypass content control method and device thereof.
Background technology
Multi-joint machine system is because it adopts varying capacity to regulate with the matching system load variations, aspect energy saving of system, demonstrate performance preferably gradually, the independent control of each indoor set and adjustable has separately improved indoor comfort, is just causing increasing attention in recent years.
At VRF (VRF, Variable Refrigerant Flow, variable refrigerant volume) in the system, because in each indoor set actual moving process, rate of load condensate changes different, adopt conventional elements formula system to control the method for the constant outlet degree of superheat, can not realize that the refrigerating capacity between each indoor set is distributed, must increase new control and regulation means.The varying capacity control method that existing indoor set is commonly used has multiple, adopts refrigerant side break-make control method and overheated (cold) degree method for continuously adjusting more.Under the different control strategies, the operating condition of system there are differences, and is different to the influences such as efficiency performance of indoor comfort and system.When adopting indoor set refrigerant side expansion valve break-make control method, this control method is simple, but fluctuations in indoor temperature is bigger, and the comfortableness degree has much room for improvement.Influenced by indoor set break-make control bigger for the off-premises station operating condition in addition, and vibration may appear in system's kind of refrigeration cycle state operating mode, and energy consumption and performance reduces; When adopting refrigerant side overheated (cold) degree method for continuously adjusting, system's operation stability is higher, the efficiency better performances.But it is higher to occur the compressor air suction temperature of making a slip of the tongue during the load condition of cooling condition lower part, influences security of system and efficiency.Existing common solution is to increase a liquid bypass subsidiary loop control suction port of compressor suction superheat, but pipe network structure and control algolithm are comparatively complicated.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind ofly have preferably operation stability, control is simple, and has the multi-online indoor machine wind side bypass content control method and the device thereof of the wet function of control.
For achieving the above object, the present invention takes following technical scheme: a kind of multi-online indoor machine wind side bypass content control method, and it comprises the steps: that (1) is provided with a blower fan, a heat exchanger, a wind side electric bypass air and an electric expansion valve in indoor set; (2) under cooling condition, aperture by wind side electric bypass air and electric expansion valve is united adjusting, carry out the control of the refrigerating capacity and the outlet degree of superheat: when room load increases, reduce the aperture of wind side electric bypass air, air quantity by heat exchanger increases, increase the aperture of electric expansion valve this moment, the control heat exchanger exit degree of superheat is constant; When room load reduces, increase the aperture of wind side electric bypass air, the air quantity minimizing by heat exchanger reduces the aperture of electric expansion valve this moment, and the control heat exchanger exit degree of superheat is constant; (3) under the heating condition, by wind side electric bypass air and and electronic expansion valve opening unite adjusting, carry out the control of heating capacity and outlet subcooling: when room load increases, reduce the aperture of wind side electric bypass air, air quantity by heat exchanger increases, increase the aperture of electric expansion valve this moment, control heat exchanger exit degree of supercooling is constant; When room load reduces, increase the aperture of wind side electric bypass air, the air quantity minimizing by heat exchanger reduces the aperture of electric expansion valve this moment, and control heat exchanger exit degree of supercooling is constant.
That described blower fan adopts is centrifugal, a kind of in axial-flow type and the cross flow blower.
The control mode of described blower fan adopts a kind of in many grades of adjustings and the VFC.
The aperture that described wind side electric bypass air is regulated continuously is 0~100%.
A kind of device of realizing above-mentioned multi-online indoor machine wind side bypass content control method, it is characterized in that: it comprises the shell of an indoor set, side end on the described shell is provided with an air inlet, in the described shell, the corresponding blower fan that is provided with described air inlet, the outlet of described blower fan is corresponding setting with the ventilating opening of a deep bead; Indoor return air is blown into respectively in a heat exchanger and one side ventilating opening after described ventilating opening is blown into described indoor set; One side of described heat exchanger is provided with an electric expansion valve, and the opposite side bottom is provided with one and coagulates water pond; Place, described bypass air port is provided with a wind side electric bypass air; Also be provided with an air outlet on the described shell.
That described blower fan adopts is centrifugal, a kind of in axial-flow type and the cross flow blower.
The continuous adjusting aperture that described wind side electric bypass air adopts is 0~100%.
That described indoor set adopts is vertical, horizontal, a kind of in the column, wall-hanging and ceiling mounting type.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is because employing is provided with blower fan, heat exchanger, bypass air port, wind side electric bypass air and electric expansion valve in indoor set, the blower fan total blast volume by the user from main regulation, the adjusting of uniting by wind side electric bypass air and electronic expansion valve opening in the indoor set, realized the control of refrigerating capacity, the outlet degree of superheat and heating capacity, outlet subcooling, its control is simple, and system's operation stability is better.2, the present invention is owing to adopt the flow of electric expansion valve heat exchanging device inner refrigerant to control, and adopt the control of wind side electric bypass air to pass through the air quantity in bypass air port, and then the change heat exchanger wind side coefficient of heat transfer, therefore, realized on the basis that does not influence indoor comfort, improved system's operation stability, control is simple.3, indoor set of the present invention is when wet cooling condition,, can change heat exchanger and absorb sensible heat and latent heat ratio by the air quantity of heat exchanger by wind side electric bypass air and electronic expansion valve regulation, therefore, realized indoor dehumidification control.The present invention can be widely used in the various multi-joint machine system of field of heating ventilation air conditioning.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention;
Fig. 2 is a horizontal indoor machine structure schematic diagram of the present invention;
Fig. 3 is a column indoor machine structure schematic diagram of the present invention;
Fig. 4 is a wall indoor unit structural representation of the present invention;
Fig. 5 is a ceiling mounting type indoor machine structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
The multi-online indoor machine wind side bypass volume controlled principle that the present invention adopts is: when the air quantity of heat exchanger changes in by indoor set, corresponding wind side convection transfer rate and wind side Temperature Distribution can change along with the variation of heat exchanger air quantity, and the result of both comprehensive functions can make the heat exchange amount of heat exchanger change.Control method of the present invention contains refrigeration and heats two kinds of operating modes, and its concrete steps are as follows:
1) in indoor set, is provided with a blower fan, a heat exchanger, one side ventilating opening, a wind side electric bypass air and an electric expansion valve.
2) under cooling condition, the total blast volume of blower fan is regulated by gear by the user or frequency conversion is carried out from main control, and indoor set is united adjusting by the aperture of wind side electric bypass air and electric expansion valve, can be achieved as follows the control of the refrigerating capacity and the outlet degree of superheat:
When room load increases, corresponding indoor temperature will raise, and reduce the aperture of wind side electric bypass air this moment, and the air quantity by the bypass air port is reduced, and corresponding air quantity by heat exchanger will increase, and then wind side convection transfer rate increases, and refrigerating capacity increases; Simultaneously, the heat exchanger exit degree of superheat increases, and at this moment, electric expansion valve also will increase aperture, strengthens refrigerant flow, and the control heat exchanger exit degree of superheat is constant;
When room load reduces, corresponding indoor temperature will reduce, and increase the aperture of wind side electric bypass air this moment, and the air quantity by the bypass air port is increased, and corresponding air quantity by heat exchanger will reduce, and then wind side convection transfer rate diminishes, and refrigerating capacity reduces; Simultaneously, the heat exchanger exit degree of superheat reduces, and at this moment, electric expansion valve also will reduce aperture, reduces refrigerant flow, and the control heat exchanger exit degree of superheat is constant.
3) under heating condition, the total blast volume of blower fan is regulated by gear by the user or frequency conversion is carried out from main control, indoor set by wind side electric bypass air and and electronic expansion valve opening unite adjusting, can be achieved as follows the control of heating capacity and outlet subcooling:
When room load increases, corresponding indoor temperature will reduce, and reduce the aperture of wind side electric bypass air this moment, and the air quantity by the bypass air port is reduced, and corresponding air quantity by heat exchanger will increase, and wind side convection transfer rate increases, and heating capacity increases; Simultaneously, the heat exchanger exit degree of supercooling increases, and at this moment, electric expansion valve also will increase aperture, strengthens refrigerant flow, and control heat exchanger exit degree of supercooling is constant;
When room load reduces, corresponding indoor temperature will raise, and increase the aperture of wind side electric bypass air this moment, and the air quantity by the bypass air port is increased, and corresponding air quantity by heat exchanger will reduce, and wind side convection transfer rate diminishes, and heating capacity reduces; Simultaneously, the heat exchanger exit degree of supercooling reduces, and at this moment, electric expansion valve also will reduce aperture, reduces refrigerant flow, and control heat exchanger exit degree of supercooling is constant.
As shown in Figure 1, multi-online indoor machine wind side bypass capacity control device of the present invention comprises the shell 1 of an indoor set, and the side end on the shell 1 is provided with an air inlet 2.In shell 1, corresponding with air inlet 2, be provided with a blower fan 3, the outlet of blower fan 3 is corresponding setting with the ventilating opening of a deep bead 4.Blower fan 3 after the ventilating opening 5 on the deep bead 4 is blown into indoor set, is divided into indoor return air two-way and is blown in the heat exchanger 6 respectively and on one side in the ventilating opening 7.One side of heat exchanger 6 is provided with an electric expansion valve 8 that is used to control heat exchanger 6 inner refrigerant flows, and the opposite side bottom of heat exchanger 6 is provided with one and coagulates water pond 9; 7 places, bypass air port are provided with a wind side electric bypass air 10, are used to control the air quantity size by bypass air port 7.Indoor return air through with heat exchanger 6 inner refrigerant heat exchange after, with the 7 indoor return air comprehensive functions of flowing out, send by an air outlet 11 that is arranged on the shell 1 then through the bypass air port.
In the foregoing description, that blower fan 3 can adopt is centrifugal, axial-flow type or cross flow blower.The control mode of blower fan 3 can adopt many grades to regulate or VFC.
In the various embodiments described above, the aperture that wind side electric bypass air 10 can be regulated continuously is 0~100%.
In sum, multi-online indoor machine wind side bypass content control method and device thereof that the present invention adopts, on the basis that does not influence indoor comfort, card can reduce the complexity of multi-joint machine system architecture, controls simple and reliable simultaneously.In addition, when indoor set operates in wet cooling condition,, can change heat exchanger 6 and absorb sensible heat and latent heat ratio (analysing wet coefficient) by the air quantity that electric expansion valve 8 is regulated by heat exchanger 6, can solve existing multi-joint machine system like this and can't control wet problem, realize indoor dehumidification control.
The various embodiments described above only are used to illustrate the present invention, the structure of each parts, size, the position is set and shape all can change to some extent, for example, indoor set of the present invention can adopt vertical (as shown in Figure 1), horizontal (as shown in Figure 2), column (as shown in Figure 3), wall-hanging (as shown in Figure 4) and ceiling mounting type (as shown in Figure 5) etc., bright dress or concealed installation etc.On the basis of technical solution of the present invention, all improvement and equivalents of individual component being carried out according to the principle of the invention all should not got rid of outside protection scope of the present invention.

Claims (10)

1. multi-online indoor machine wind side bypass content control method, it comprises the steps:
(1) in indoor set, is provided with a blower fan, a heat exchanger, a wind side electric bypass air and an electric expansion valve;
(2) under cooling condition, aperture by wind side electric bypass air and electric expansion valve is united adjusting, carry out the control of the refrigerating capacity and the outlet degree of superheat: when room load increases, reduce the aperture of wind side electric bypass air, air quantity by heat exchanger increases, increase the aperture of electric expansion valve this moment, the control heat exchanger exit degree of superheat is constant; When room load reduces, increase the aperture of wind side electric bypass air, the air quantity minimizing by heat exchanger reduces the aperture of electric expansion valve this moment, and the control heat exchanger exit degree of superheat is constant;
(3) under the heating condition, by wind side electric bypass air and and electronic expansion valve opening unite adjusting, carry out the control of heating capacity and outlet subcooling: when room load increases, reduce the aperture of wind side electric bypass air, air quantity by heat exchanger increases, increase the aperture of electric expansion valve this moment, control heat exchanger exit degree of supercooling is constant; When room load reduces, increase the aperture of wind side electric bypass air, the air quantity minimizing by heat exchanger reduces the aperture of electric expansion valve this moment, and control heat exchanger exit degree of supercooling is constant.
2. a kind of multi-online indoor machine wind side bypass content control method as claimed in claim 1 is characterized in that: described blower fan adopts a kind of in centrifugal, axial-flow type and the cross flow blower.
3. a kind of multi-online indoor machine wind side bypass content control method as claimed in claim 1 is characterized in that: the control mode of described blower fan adopts a kind of in many grades of adjustings and the VFC.
4. a kind of multi-online indoor machine wind side bypass content control method as claimed in claim 2 is characterized in that: the control mode of described blower fan adopts a kind of in many grades of adjustings and the VFC.
5. as claim 1 or 2 or 3 or 4 described a kind of multi-online indoor machine wind side bypass content control methods, it is characterized in that: the aperture that described wind side electric bypass air is regulated continuously is 0~100%.
6. a realization is as the device of multi-online indoor machine wind side bypass content control method as described in any one of the claim 1~5, it is characterized in that: it comprises the shell of an indoor set, side end on the described shell is provided with an air inlet, in the described shell, the corresponding blower fan that is provided with described air inlet, the outlet of described blower fan is corresponding setting with the ventilating opening of a deep bead; Indoor return air is blown into respectively in a heat exchanger and one side ventilating opening after described ventilating opening is blown into described indoor set; One side of described heat exchanger is provided with an electric expansion valve, and the opposite side bottom is provided with one and coagulates water pond; Place, described bypass air port is provided with a wind side electric bypass air; Also be provided with an air outlet on the described shell.
7. a kind of multi-online indoor machine wind side bypass capacity control device as claimed in claim 6 is characterized in that: described blower fan adopts a kind of in centrifugal, axial-flow type and the cross flow blower.
8. as claim 6 or 7 described a kind of multi-online indoor machine wind side bypass capacity control devices, it is characterized in that: the continuous adjusting aperture that described wind side electric bypass air adopts is 0~100%.
9. as claim 6 or 7 described a kind of multi-online indoor machine wind side bypass capacity control devices, it is characterized in that: described indoor set adopts a kind of in vertical, horizontal, column, the wall-hanging and ceiling mounting type.
10. a kind of multi-online indoor machine wind side bypass capacity control device as claimed in claim 8 is characterized in that: described indoor set adopts a kind of in vertical, horizontal, column, the wall-hanging and ceiling mounting type.
CN201010255267A 2010-08-16 2010-08-16 Multi-online indoor machine wind side bypass capacity control method and device thereof Active CN101915450B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106152379A (en) * 2015-03-30 2016-11-23 青岛海尔智能技术研发有限公司 A kind of mixed flow air-conditioning and mixed flow control method thereof
CN106152378A (en) * 2015-03-30 2016-11-23 青岛海尔智能技术研发有限公司 A kind of mixed flow air-conditioning and mixed flow control method thereof
WO2017185733A1 (en) * 2016-04-25 2017-11-02 广东美的暖通设备有限公司 Air conditioning system and valve control method therefor
CN109654598A (en) * 2019-02-21 2019-04-19 南京天加环境科技有限公司 A kind of adjustable air-conditioning system of heating condensing pressure and its control method
WO2020133926A1 (en) * 2018-12-29 2020-07-02 合肥美的暖通设备有限公司 Control method and device for low-temperature cooling air valve

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009050865A1 (en) * 2007-10-16 2009-04-23 Panasonic Corporation Air conditioning apparatus
CN101776308A (en) * 2009-01-13 2010-07-14 珠海格力电器股份有限公司 Energy-saving air conditioner
CN201772571U (en) * 2010-08-16 2011-03-23 清华大学 Capacity control device with air side bypass for multi-line indoor unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009050865A1 (en) * 2007-10-16 2009-04-23 Panasonic Corporation Air conditioning apparatus
CN101776308A (en) * 2009-01-13 2010-07-14 珠海格力电器股份有限公司 Energy-saving air conditioner
CN201772571U (en) * 2010-08-16 2011-03-23 清华大学 Capacity control device with air side bypass for multi-line indoor unit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106152379A (en) * 2015-03-30 2016-11-23 青岛海尔智能技术研发有限公司 A kind of mixed flow air-conditioning and mixed flow control method thereof
CN106152378A (en) * 2015-03-30 2016-11-23 青岛海尔智能技术研发有限公司 A kind of mixed flow air-conditioning and mixed flow control method thereof
CN106152378B (en) * 2015-03-30 2019-10-25 青岛海尔智能技术研发有限公司 A kind of mixed flow air-conditioning and its mixed flow control method
CN106152379B (en) * 2015-03-30 2020-04-28 青岛海尔智能技术研发有限公司 Mixed flow air conditioner and mixed flow control method thereof
WO2017185733A1 (en) * 2016-04-25 2017-11-02 广东美的暖通设备有限公司 Air conditioning system and valve control method therefor
WO2020133926A1 (en) * 2018-12-29 2020-07-02 合肥美的暖通设备有限公司 Control method and device for low-temperature cooling air valve
CN109654598A (en) * 2019-02-21 2019-04-19 南京天加环境科技有限公司 A kind of adjustable air-conditioning system of heating condensing pressure and its control method

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