CN101086370A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN101086370A CN101086370A CN 200610014104 CN200610014104A CN101086370A CN 101086370 A CN101086370 A CN 101086370A CN 200610014104 CN200610014104 CN 200610014104 CN 200610014104 A CN200610014104 A CN 200610014104A CN 101086370 A CN101086370 A CN 101086370A
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Abstract
The invention discloses an air-conditioner and the control method. The air-conditioner comprises the following parts: a plurality of outdoor machines, a plurality of indoor machines and a control device. The outdoor machine comprises the following parts: a compressor, an outdoor heat exchanger, an outdoor electromechanical expansion valve, wherein the outdoor machine is separately connected with the indoor machine. The indoor machine comprises the following parts: an indoor heat exchanger, an indoor electromechanical expansion valve. The control device comprises the following parts: an indoor controller for controlling the indoor machine and an outdoor controller for controlling the outdoor machine, wherein the indoor controller is connected with the outdoor controller, the control device keeps the ejection temperature of the outdoor machine compressor in the finite temperature by controlling the open degree of the outdoor electromechanical expansion valve. The invention reduces the ejection temperature deviation of every compressor according to the operation state of the frequency conversion compressor and the constant speed compressor and distributes the coolant flow uniformly, which avoids the super-heated phenomena of the compressor, improves the reliability of the product.
Description
Technical field
The present invention relates to a kind of air-conditioner, particularly relate to a kind of air-conditioner and control method thereof.
Background technology
In general, regulate the household electrical appliance of indoor environment to building interior space supply cold air or heating installation, generally comprise: parts such as compressor, condenser, evaporimeter and expansion valve thereby air-conditioner is a kind of being used for.Air-conditioner generally can be divided into two types of detachable air conditioner and integral air conditioners.
The function of described detachable air conditioner and integral air conditioner is basic identical, and the difference of the two is: detachable air conditioner comprises indoor set and off-premises station two parts.Indoor set is provided with indoor heat converter (evaporimeter or condenser), and off-premises station is provided with outdoor heat converter (condenser or evaporimeter) and compressor, is connected by the refrigerant pipe between indoor set and the off-premises station; Integral air conditioner is provided with indoor heat converter, compressor and outdoor heat converter simultaneously.
In addition, described integral air conditioner can be further divided into: be arranged on the window window air conditioner be arranged on the channel-type air-conditioner that the room outside is connected with the exhaust passage with air intake passage respectively.Described detachable air conditioner can be further divided into: upright cabinet air conditioner that is provided with and the wall-hanging air conditioner that hangs over wall.
In addition, according to the difference of its function, air-conditioner can be divided into: only have the refrigeration formula air-conditioner of refrigerating function and have refrigeration simultaneously and the refrigerating and heating type air-conditioner of pyrogenicity function.
In addition, develop composite air conditioner in recent years, this composite air conditioner is a kind of air-conditioner that at least one off-premises station is connected with a plurality of indoor sets.
But there is following shortcoming in above-mentioned existing composite air conditioner:
The off-premises station of existing composite air conditioner is provided with a frequency-changeable compressor and a plurality of constant speed compressor, but in each compressor operating process, can not come the reasonable distribution cold medium flux according to the load and the running status of each compressor, therefore to reach the steady operational status required time longer for air-conditioner, and under labile state the continuous service long period be unfavorable for energy savings, reduced the performance of air-conditioner.
In addition, because the running status difference of each compressor, make the temperature at outlet place of each compressor differ bigger, can cause compressor cold medium flux deficiency, cause compressor long-play and impaired under superheat state.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of above-mentioned composite air conditioner, and a kind of air-conditioner and control method thereof are provided; The temperature at the frequency-changeable compressor by detecting off-premises station and the outlet place of constant speed compressor, and by controlling the duty of electromagnetic expanding valve, make the difference of temperature at outlet place of the temperature at outlet place of frequency-changeable compressor and constant speed compressor keep within limits, thereby dwindle the deviation between the temperature at each compressor discharge port place, the uniform distribution cold medium flux, the performance of raising air-conditioner.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: air-conditioner of the present invention comprises: a plurality of off-premises stations, a plurality of indoor set and a control device; Described off-premises station comprises respectively: compressor, outdoor heat converter and outdoor electromagnetic expanding valve; Described indoor set is connected with off-premises station respectively, comprising: indoor heat converter and indoor electromagnetic expanding valve; Described control device comprises: the indoor controller and the outdoor controller that is used for controlling off-premises station that are used for controlling indoor set; Described indoor controller is connected with outdoor controller; The effect of control device is, the opening degree of the outdoor electromagnetic expanding valve by the control off-premises station remains in the uniform temperature discharge temperature of the compressor of off-premises station.
Described off-premises station comprises: frequency conversion type/constant speed formula master's off-premises station and two auxiliary off-premises stations of constant speed formula.
The control method of air-conditioner of the present invention: comprising:
Step 1: the outdoor temperature sensing device of exhaust ports by being arranged on frequency-changeable compressor in the main off-premises station and constant speed compressor and the exhaust ports that is arranged on the constant speed compressor in the auxiliary off-premises station and the discharge temperature that the indoor temperature sensing device detects each frequency-changeable compressor and constant speed compressor respectively.
Step 2: whether the difference of the discharge temperature of the discharge temperature of detected constant speed compressor and frequency-changeable compressor is greater than certain temperature range in the determining step 1.
Step 3: according to the judged result of step 2, the opening degree of electromagnetism expansion valve outside the control room remains in the certain temperature range difference of the discharge temperature of the discharge temperature of constant speed compressor and frequency-changeable compressor.
In step 2, whether greater than certain temperature range, the allowable error scope of difference of setting the discharge temperature of the discharge temperature of constant speed compressor and frequency-changeable compressor is A ℃ for the ease of the difference of the discharge temperature of the discharge temperature of detected constant speed compressor in the determining step 1 and frequency-changeable compressor.
If judged result is: the difference of the discharge temperature of detected constant speed compressor and the discharge temperature of frequency-changeable compressor is greater than A ℃ of setting value, then make the opening degree of described outdoor electromagnetic expanding valve increase B%, thereby the discharge temperature of described constant speed compressor is dropped to below the discharge temperature of frequency-changeable compressor; If judged result is: the difference of the discharge temperature of detected constant speed compressor and the discharge temperature of frequency-changeable compressor is lower than A ℃, then reduces the opening degree of described outdoor electromagnetic expanding valve, thereby described frequency-changeable compressor and constant speed compressor are normally moved.
Beneficial effect of the present invention is: when the difference of the discharge temperature of discharge temperature that detects described frequency-changeable compressor and constant speed compressor surpasses certain limit, the opening degree of electromagnetism expansion valve outside the automatic control room, the discharge temperature of described constant speed compressor is reduced, thereby can reduce the deviation of discharge temperature of each compressor according to the running status of frequency-changeable compressor and constant speed compressor and the uniform distribution cold medium flux, make air-conditioner enter steady operational status fast, simultaneously can prevent that superheating phenomenon from appearring in compressor, improve the reliability of products energy.
Description of drawings
Fig. 1 is the schematic layout pattern of air-conditioner of the present invention in building.
Fig. 2 is the connected mode schematic diagram of air-conditioner part of the present invention.
Fig. 3 is the structural representation of air-conditioner of the present invention.
Fig. 4 is the control loop block diagram of air-conditioner of the present invention.
Fig. 5 is the control method flow chart of air-conditioner of the present invention.
Among the figure:
I ': indoor set 51: indoor heat converter
52: indoor blower assembly 54: indoor electromagnetic expanding valve
56: indoor temperature sensing device M: main off-premises station
S1, S2: auxiliary off-premises station 60: outdoor heat converter
63,64: compressor 66: outdoor electromagnetic expanding valve
90: outdoor temperature sensing device 92: the low pressure sensing device
93: high-pressure sensing device 100: control device
102: indoor controller 104: outdoor controller
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Fig. 1 is the schematic layout pattern of air-conditioner of the present invention in building.Fig. 2 is the connected mode schematic diagram of air-conditioner part of the present invention.Fig. 3 is the structural representation of air-conditioner of the present invention.Fig. 4 is the control loop block diagram of air-conditioner of the present invention.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, air-conditioner of the present invention comprises: be separately positioned on a plurality of indoor set I ' in each room of building; Off-premises station M, the S1, the S2 that are connected with indoor set I ' respectively by refrigerant pipe P '; With the control device 100 that is used for controlling each indoor set I ' and off-premises station M, S1, S2 duty.This air-conditioner is a kind of refrigerating and heating type air-conditioner.
Described off-premises station M, S1, S2 start according to the requirement of at least one indoor set I ' among the indoor set I '; The desired refrigeration of described indoor set I '/pyrogenicity power is big more, the startup quantity of off-premises station M, S1, S2 and to be arranged on the startup quantity of the compressor in off-premises station M, S1, the S2 also just many more.
Described indoor set I ' comprising: the indoor heat converter 51 that is used for making air in the room that is provided with indoor set I ' and refrigerant to carry out heat exchange; Be used for to be provided with air in the room of indoor set I ' and be transported to indoor blower assembly 52 on the indoor heat converter 51; With when air-conditioner moves in the refrigeration mode, the indoor electromagnetic expanding valve 54 of the indoor flow regulator 54 that changes cold medium flux according to the refrigeration temperature of setting and pyrogenicity temperature.
When air-conditioner moves in the refrigeration mode, liquid refrigerants in the described indoor heat converter 51 carries out heat exchange with the room air that is inhaled into, make the room air cooling in the evaporation process of liquid refrigerants, at this moment, described indoor heat converter 51 plays evaporimeter; And when air-conditioner so that hot mode operation, gaseous coolant in the described indoor heat converter 51 carries out heat exchange with the room air that is inhaled into, indoor air temperature is raise, and at this moment, described indoor heat converter 51 plays condenser.
Described indoor heat converter 51 is provided with and is used for detecting the indoor temperature sensing device 56 of temperature of the refrigerant in the indoor heat converter 51 of flowing through.
Described indoor blower assembly 52 comprises: indoor blower motor 52a and indoor blower 52b; Described indoor blower 52b is connected with indoor blower motor 52a; Described indoor blower motor 52a drives indoor blower 52b rotation under the control of control device 100.
Described off-premises station comprises: main off-premises station M and auxiliary off-premises station S1, S2; After air-conditioner was activated, described main off-premises station M just was in running status always, and is irrelevant with the load of indoor set I '; Described auxiliary off-premises station S1, S2 then start selectively according to the size of the load of indoor set I '.
Described main off-premises station M and auxiliary off-premises station S1, S2 comprise: be used for making outdoor air and refrigerant to carry out the outdoor heat converter 60 of heat exchange; Be used for outdoor air is transported to outdoor draft fan assembly 61 on the outdoor heat converter 60; Be used for only exporting the fluid reservoir 62 of gaseous coolant; Be used for compressing compressor 63,64 from the gaseous coolant of fluid reservoir 62 outputs; Be used for switching the cross valve 65 that refrigerant flows to; With when the operation of air-conditioner so that hot mode, the outdoor electromagnetic expanding valve 66 of the outdoor flow regulator 66 that changes cold medium flux according to the refrigeration temperature of setting and pyrogenicity temperature.
When air-conditioner moves in the refrigeration mode, gaseous coolant in the described outdoor heat converter 60 carries out heat exchange with the outdoor air that is inhaled into, outdoor air is heated up, and at this moment, described outdoor heat converter 60 plays condenser; And when air-conditioner so that hot mode operation, liquid refrigerants in the described outdoor heat converter 60 carries out heat exchange with the outdoor air that is inhaled into, make the outdoor air cooling in the evaporation process of liquid refrigerants, at this moment, described outdoor heat converter 60 plays evaporimeter.
Described outdoor heat converter 60 is provided with the outdoor temperature sensing device 90 of the outdoor temperature of the exhaust ports that is used for detecting off-premises station M, S1, S2.
Described outdoor draft fan assembly 61 comprises: outdoor draft fan motor 61a and outdoor draft fan 61b; Described outdoor draft fan 61b is connected with outdoor draft fan motor 61a; Described outdoor draft fan motor 61a drives outdoor draft fan 61b rotation under the control of control device 100.
Described main off-premises station M comprises: compressor 63 and compressor 64; One is frequency-changeable compressor in described compressor 63 and the compressor 64, and another can be a constant speed compressor.
Described auxiliary off-premises station S1, S2 comprise respectively: compressor 63 and compressor 64; Described compressor 63 and compressor 64 are constant speed compressor.
The suction inlet of described compressor 63,64 and outlet are respectively arranged with low pressure sensing device 92 and the high-pressure sensing device 93 that is used for detecting suction/discharge pressure.
Described fluid reservoir 62 is connected with compressor 64 with compressor 63 respectively, is used jointly by compressor 63 and compressor 64.
Described control device 100 comprises: the indoor controller 102 and the outdoor controller 104 that is used for controlling off-premises station M, S1, S2 that are used for controlling indoor set I '; Described indoor controller 102 is connected with outdoor controller 104.
The course of work when below air-conditioner of the present invention being moved in the refrigeration mode is illustrated:
When at least one indoor set I ' request moves in the refrigeration mode among a plurality of indoor set I ', then the refrigerant through compressor 63,64 compressions flows through cross valve 65, outdoor heat converter 60, outdoor electromagnetic expanding valve 66, indoor electromagnetic expanding valve 54 and indoor heat converter 51 successively along refrigerant pipe P ', is recycled to compressor 63,64 by cross valve 65 more afterwards.Certainly, circulate between the indoor set I ' that just is in operation of refrigerant and off-premises station M, S1, the S2.
In above-mentioned refrigerant cyclic process, described indoor heat converter 51 constantly absorbs the heat of air in the room that is provided with indoor set I ', and the air themperature in the room is reduced gradually, reaches the purpose of refrigeration.
At this moment, described indoor electromagnetic expanding valve 54 is complete opening under refrigeration temperature of setting and pyrogenicity temperature controlling, and refrigerant is passed through under the situation that does not have expansion.
Otherwise, when at least one indoor set I ' request so that hot mode move among a plurality of indoor set I ', then the refrigerant through compressor 63,64 compressions flows through cross valve 65, indoor heat converter 51, indoor electromagnetic expanding valve 54, outdoor electromagnetic expanding valve 66 and outdoor heat converter 60 successively along refrigerant pipe P ', is recycled to compressor 63,64 by cross valve 65 more afterwards.
In above-mentioned refrigerant cyclic process, described indoor heat converter 51 constantly in the room that is provided with indoor set I ' air emit heat, the air themperature in the room is raise gradually, reach the purpose of pyrogenicity.
At this moment, described indoor electromagnetic expanding valve 54 is complete opening under refrigeration temperature of setting and pyrogenicity temperature controlling, and refrigerant is passed through under the situation that does not have expansion.
The state of described outdoor electromagnetic expanding valve 66 is controlled according to method as shown in Figure 5.
Fig. 5 is the control method flow chart of air-conditioner of the present invention.
As shown in Figure 5, the control method of air-conditioner of the present invention comprises:
Step S1: make air-conditioner begin to move, and control the duty of the compressor 63,64 of off-premises station M, S1, S2 with refrigeration or pyrogenicity mode.
For example, control is arranged on main off-premises station M and the frequency-changeable compressor of auxiliary off-premises station S1, S2 and the duty of constant speed compressor of air-conditioner.
Step S2: respectively by being arranged on frequency-changeable compressor and the outdoor temperature sensing device 90 of the exhaust ports of constant speed compressor and the exhaust ports that is arranged on the constant speed compressor in auxiliary off-premises station S1, the S2 and the discharge temperature that indoor temperature sensing device 56 detects each frequency-changeable compressor and constant speed compressor in the main off-premises station M.
Step S3: whether the difference of discharge temperature of judging the discharge temperature of detected constant speed compressor and frequency-changeable compressor is greater than A ℃.
Step S4: if the judged result of step S3 is: the difference of the discharge temperature of detected constant speed compressor and the discharge temperature of frequency-changeable compressor is greater than A ℃ of setting value, then make the opening degree of described outdoor electromagnetic expanding valve 66 increase B%, thereby the discharge temperature of described constant speed compressor is dropped to below the discharge temperature of frequency-changeable compressor.
Step S5, S6: if the judged result of step S3 is: the difference of the discharge temperature of detected constant speed compressor and the discharge temperature of frequency-changeable compressor is lower than A ℃, then reduce the opening degree of described outdoor electromagnetic expanding valve 66, thereby described frequency-changeable compressor and constant speed compressor are normally moved.
It is worthy of note; protection scope of the present invention is not limited to the embodiment and the disclosed content of accompanying drawing of specification; according to basic fundamental design of the present invention; those of ordinary skill in the art need not can associate some other specific embodiment through creative work, and protection scope of the present invention is as the criterion with the content of claims record.
Claims (5)
1. air-conditioner is characterized in that: comprising: a plurality of off-premises stations (M, S1, S2), a plurality of indoor set (I ') and a control device (100); Described off-premises station (M, S1, S2) comprises respectively: compressor (63,64), outdoor heat converter (60) and outdoor electromagnetic expanding valve (66); Described indoor set (I ') be connected with off-premises station (M, S1, S2) respectively, comprising: indoor heat converter (51) and indoor electromagnetic expanding valve (54); Described control device (100) comprising: be used for controlling the indoor controller (102) of indoor set (I ') and be used for controlling the outdoor controller (104) of off-premises station (M, S1, S2); Described indoor controller (102) is connected with outdoor controller (104); The effect of control device (100) is, the opening degree of the outdoor electromagnetic expanding valve (66) by control off-premises station (M, S1, S2) remains in the uniform temperature discharge temperature of the compressor (63,64) of off-premises station (M, S1, S2).
2. air-conditioner according to claim 1 is characterized in that: described off-premises station (M, S1, S2) comprising: a frequency conversion type/constant speed formula master off-premises station (M) and two auxiliary off-premises stations (S1, S2) of constant speed formula.
3. the control method of air-conditioner according to claim 1 is characterized in that: comprising:
Step 1: the outdoor temperature sensing device (90) of exhaust ports by being arranged on frequency-changeable compressor in the main off-premises station (M) and constant speed compressor and the exhaust ports that is arranged on the constant speed compressor in the auxiliary off-premises station (S1, S2) and the discharge temperature that indoor temperature sensing device (56) detects each frequency-changeable compressor and constant speed compressor respectively.
Step 2: whether the difference of the discharge temperature of the discharge temperature of detected constant speed compressor and frequency-changeable compressor is greater than certain temperature range in the determining step 1.
Step 3: according to the judged result of step 2, the opening degree of electromagnetism expansion valve (66) outside the control room remains in the certain temperature range difference of the discharge temperature of the discharge temperature of constant speed compressor and frequency-changeable compressor.
4. the control method of air-conditioner according to claim 3, it is characterized in that: in step 2, whether greater than certain temperature range, the allowable error scope of difference of setting the discharge temperature of the discharge temperature of constant speed compressor and frequency-changeable compressor is A ℃ for the ease of the difference of the discharge temperature of the discharge temperature of detected constant speed compressor in the determining step 1 and frequency-changeable compressor.
5. according to the control method of claim 3 or 4 described air-conditioners, it is characterized in that: if judged result is: the difference of the discharge temperature of detected constant speed compressor and the discharge temperature of frequency-changeable compressor is greater than A ℃ of setting value, then make the opening degree of described outdoor electromagnetic expanding valve (66) increase B%, thereby the discharge temperature of described constant speed compressor is dropped to below the discharge temperature of frequency-changeable compressor; If judged result is: the difference of the discharge temperature of detected constant speed compressor and the discharge temperature of frequency-changeable compressor is lower than A ℃, then reduce the opening degree of described outdoor electromagnetic expanding valve (66), thereby described frequency-changeable compressor and constant speed compressor are normally moved.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610014104 CN101086370A (en) | 2006-06-06 | 2006-06-06 | Air conditioner and control method thereof |
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|---|---|---|---|
| CN 200610014104 CN101086370A (en) | 2006-06-06 | 2006-06-06 | Air conditioner and control method thereof |
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| CN101086370A true CN101086370A (en) | 2007-12-12 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741969A (en) * | 2013-08-09 | 2014-04-23 | 陆粉干 | Environment-friendly and energy-saving intelligent constant-temperature constant-humidity clean workshop system |
| CN104776504A (en) * | 2015-04-19 | 2015-07-15 | 北京德能恒信科技有限公司 | Three-piece type machine room energy-saving air conditioning system |
| CN104964343A (en) * | 2015-06-12 | 2015-10-07 | 广东美的暖通设备有限公司 | Device and method for improving running reliability of compressor |
| CN105823142A (en) * | 2016-04-29 | 2016-08-03 | 宁波奥克斯电气股份有限公司 | Outdoor unit set of air conditioning variable refrigerant volume system and pressure detection method |
| CN107477933A (en) * | 2017-09-18 | 2017-12-15 | 广东美的暖通设备有限公司 | Control method, system and the computer-readable recording medium of multi-connected air conditioner |
| WO2019052035A1 (en) * | 2017-09-18 | 2019-03-21 | 广东美的暖通设备有限公司 | Method for controlling multi-split air conditioner, multi-split air conditioner system, and computer-readable storage medium |
| CN113819629A (en) * | 2021-09-09 | 2021-12-21 | 青岛海尔空调器有限总公司 | Method, apparatus and storage medium for regulating indoor environment |
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2006
- 2006-06-06 CN CN 200610014104 patent/CN101086370A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741969A (en) * | 2013-08-09 | 2014-04-23 | 陆粉干 | Environment-friendly and energy-saving intelligent constant-temperature constant-humidity clean workshop system |
| WO2015018109A1 (en) * | 2013-08-09 | 2015-02-12 | Lu Fengan | Environmentally-friendly and energy-saving intelligent clean plant system of constant temperature and humidity |
| CN103741969B (en) * | 2013-08-09 | 2016-03-09 | 陆粉干 | The Intelligent constant temperature of environmental protection and energy saving, constant-humidity clean workshop system |
| CN104776504A (en) * | 2015-04-19 | 2015-07-15 | 北京德能恒信科技有限公司 | Three-piece type machine room energy-saving air conditioning system |
| CN104964343A (en) * | 2015-06-12 | 2015-10-07 | 广东美的暖通设备有限公司 | Device and method for improving running reliability of compressor |
| CN105823142A (en) * | 2016-04-29 | 2016-08-03 | 宁波奥克斯电气股份有限公司 | Outdoor unit set of air conditioning variable refrigerant volume system and pressure detection method |
| CN105823142B (en) * | 2016-04-29 | 2019-06-18 | 宁波奥克斯电气股份有限公司 | A kind of outer machine unit and pressure detection method of air conditioning multi-couple machine |
| CN107477933A (en) * | 2017-09-18 | 2017-12-15 | 广东美的暖通设备有限公司 | Control method, system and the computer-readable recording medium of multi-connected air conditioner |
| WO2019052035A1 (en) * | 2017-09-18 | 2019-03-21 | 广东美的暖通设备有限公司 | Method for controlling multi-split air conditioner, multi-split air conditioner system, and computer-readable storage medium |
| US11137157B2 (en) | 2017-09-18 | 2021-10-05 | Gd Midea Heating & Ventilating Equipment Co., Ltd. | Method for controlling multi-split air conditioner, multi-split air conditioner system, and computer-readable storage medium |
| CN113819629A (en) * | 2021-09-09 | 2021-12-21 | 青岛海尔空调器有限总公司 | Method, apparatus and storage medium for regulating indoor environment |
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