CN101900463B

CN101900463B - Air-conditioner and air-conditioner control method

Info

Publication number: CN101900463B
Application number: CN2010102194677A
Authority: CN
Inventors: 李金波; 张�浩; 李强
Original assignee: GD Midea Holding Co Ltd
Current assignee: Midea Group Co Ltd
Priority date: 2010-06-30
Filing date: 2010-06-30
Publication date: 2012-05-02
Anticipated expiration: 2030-06-30
Also published as: CN101900463A

Abstract

The invention discloses an air-conditioner and an air-conditioner control method. The air-conditioner comprises an outdoor heat exchanger, a four-way valve, a compressor, an indoor heat exchanger and throttling gears, wherein the throttling gears are connected in series between the outdoor heat exchanger and the indoor heat exchanger. The air-conditioner is characterized in that the throttling gear is provided with more than two gears which have different flows and can be switched according to different circulation modes and operation frequency of the compressor and an outdoor ambient temperature. The throttling gear comprises a first valve body provided with a first cavity, the first valve body is provided with a first inlet and a first outlet which are communicated with the first cavity, the first cavity is provided with a first base for partitioning the first inlet and the first outlet, and the first base is provided with a first aperture and a second aperture for respectively communicating with the first inlet and the first outlet. The invention has the characteristics of simple and reasonable structure, flexible operation, low manufacturing cost and wide applicable scope, can effectively improve the energy efficiency of the air conditioner and can improve the maximum operation capability and the lower-temperature heating capability of the air conditioner.

Description

A kind of air-conditioner and air-conditioner control method

Technical field

The present invention relates to a kind of air-conditioner, particularly a kind of air-conditioner and air-conditioner control method.

Background technology

Convertible frequency air-conditioner can be to regulate running frequency within the specific limits along with the variation of load, to change fan-out capability.Reach fast-refrigerating during high-frequency or heat, reduce output during low frequency, to reach energy-conservation purpose.But; Common convertible frequency air-conditioner; If the employing capillary-compensated, then since the refrigerating capillary flow with heat the fixing of capillary flow, make this common convertible frequency air-conditioner can only when certain frequency operation, Energy Efficiency Ratio reach optimum in refrigeration or when heating; Efficiency is not an optimum state when the operation of other frequencies, show be exactly freeze energy resource consumption in season efficient SEER, heat energy resource consumption in season efficient HSPF and annual energy resource consumption efficient APF is not high.Simultaneously,, when common convertible frequency air-conditioner moves to high frequency, situation such as delivery temperature protection under a lot of operating modes, occur, make common convertible frequency air-conditioner can not keep high frequency operation, the purpose that can not reach fast-refrigerating or heat through regular meeting because the capillary flow is fixing.

For addressing these problems; The high-end convertible frequency air-conditioner in existing market top begins to adopt the electric expansion valve throttling, can improve efficiency like this, also can effectively avoid situation appearance such as delivery temperature protection; But the electronic expansion valve module is more expensive, and it is more to cause the air-conditioning cost to increase.

The constant speed air-conditioning generally adopts capillary-compensated, but because the capillary flow is fixed, situation such as exhaust protection under the bad working environments of being everlasting, can occur, and is lower at the worst cold case heating capacity, and the air-conditioning blowing is cool, causes that client is discontented.

Summary of the invention

The object of the invention aims to provide a kind of simple and reasonable, flexible operation, cost of manufacture is low, Energy Efficiency Ratio is high, can improve the maximum service ability of air-conditioner, again can low-temperature heating ability air-conditioner and air-conditioner control method applied widely, to overcome weak point of the prior art.

A kind of air-conditioner by this purpose design; Comprise outdoor heat exchanger, cross valve, compressor, indoor heat exchanger and throttling arrangement; Throttling arrangement is serially connected between outdoor heat exchanger and the indoor heat exchanger, and its architectural feature is to be provided with two gears that above flow varies in size that switch according to the different circulation patterns of compressor and running frequency and outdoor environment temperature in the throttling arrangement; Wherein, the different circulation patterns of compressor are meant kind of refrigeration cycle and heat circulation.

Said air-conditioner also comprises provides the compressor control of compressor operating frequency loop and the temperature sensor that detects outdoor environment temperature, and throttling arrangement also comprises the controller of regulating gear.

Said throttling arrangement comprises first valve body with first cavity; First valve body is provided with first import and first outlet that communicates with first cavity; Be provided with first base that is used to cut off first import and first outlet in first cavity; First base is provided with first aperture and second aperture that is communicated with first import and first outlet respectively; First base is provided with first slide block that is used to seal first aperture or second aperture, and an end of first slide block and first spring joins, and the inwall of the other end of first spring and first cavity joins; First side of valve body is provided with and corresponding first coil of first slide block, and the flow of flow-rate ratio second aperture of first aperture is little.

Spacing between said first aperture and second aperture is less than the width of first slide block.

Said throttling arrangement comprises second valve body with second cavity; Second valve body is provided with second import and second outlet that communicates with second cavity; Be provided with second slide block that changes the second valve body flow in second cavity; Be provided with first spacing and second spacing on the sliding stroke that is positioned at second slide block in second cavity, the projection on second slide block or second slide block first spacing and second spacing between, the tapered or wedge shape in the end of second slide block; The end of second slide block is positioned at the joint of second import or second outlet and second inner chamber; One end of second slide block and second spring joins, and the inwall of the other end of second spring and second cavity joins, and second side of valve body is provided with and corresponding second coil of second slide block.

A kind of air-conditioner control method is characterized in that in the kind of refrigeration cycle of air-conditioner refrigeration frequency F1 and the temperature value T1 of preset compressor, heat preset compressor in the circulation heat frequency F2 and temperature value T2, when air-conditioner moves, comprise the steps:

The first step, detect the operational mode of air-conditioner, the running frequency f and the outdoor environment temperature t of compressor: if be kind of refrigeration cycle, then got into for second step, if, then got into for the 5th step for heating circulation,

Second step, relatively running frequency f and refrigeration frequency F1 and outdoor environment temperature t and temperature value T1: if running frequency f >=refrigeration frequency F1, no matter the relation of outdoor environment temperature t and temperature value T1 how, would all have got into for the 3rd step; If when running frequency f＜refrigeration frequency F1, and outdoor environment temperature t >=temperature value T1, got into for the 3rd step; If when running frequency f＜refrigeration frequency F1, and outdoor environment temperature t＜temperature value T1, got into for the 4th step,

The 3rd step, select the big gear of flow to carry out conducting through controller,

The 4th step, select the little gear of flow to carry out conducting through controller,

The 5th step, relatively running frequency f with heat frequency F2 and outdoor environment temperature t and temperature value T2: if running frequency f >=heat frequency F2 during and outdoor environment temperature t >=temperature value T2, got into for the 6th step; If when running frequency f >=heat frequency F2, and outdoor environment temperature t＜temperature value T2, got into for the 7th step; If running frequency f＜heat frequency F2, no matter the relation of outdoor environment temperature t and temperature value T2 how, all got into for the 7th step,

The 6th step, select the big gear of flow to carry out conducting through controller,

In the 7th step, select the little gear of flow to carry out conducting through controller.

Said refrigeration frequency F1 is 4～130Hz with the span that heats frequency F2, and the span of temperature value T1 and temperature value T2 is-20～60 ℃.

The present invention is owing to adopted the throttling arrangement with two retaining different flows; Can select the different gears of throttling arrangement to change flow according to system requirements: to select the less gear of flow when low frequency or during outdoor low temperature; During high frequency or outdoor environment temperature select the bigger gear of flow when too high, thereby effectively improve operation of air conditioner in efficiency and the ability of each frequency during with each operating mode.

That the present invention has is simple and reasonable, flexible operation, cost of manufacture is low and advantage of wide range of application, can effectively improve the efficiency of air-conditioner, also can improve the maximum service ability and the low-temperature heating ability of air-conditioner simultaneously.

Description of drawings

Fig. 1 is one embodiment of the invention structural representation.

Fig. 2 is the first example structure sketch map of the throttling arrangement among the present invention.

Fig. 3 is the second example structure sketch map of the throttling arrangement among the present invention.

Fig. 4 is a control flow block diagram of the present invention.

Among the figure: 1 is outdoor heat exchanger, and 2 is cross valve, and 3 is compressor, and 4 is indoor heat exchanger, and 5 is throttling arrangement; 6 is first valve body, and 6.1 is first import, and 6.2 is first outlet, and 7 is first slide block, and 8 is first base; 9 is first aperture, and 10 is second aperture, and 11 is first spring, and 12 is first coil, and 16 is second valve body; 16.1 be second import, 16.2 is second outlet, 16.3 is first spacing, and 16.4 is second spacing; 17 is second slide block, and 17.1 is projection, and 21 is second spring, and 22 is second coil.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is further described.

First embodiment

Referring to Fig. 1-Fig. 2 and Fig. 4; This air-conditioner; Comprise the outdoor heat exchanger 1, cross valve 2, compressor 3, indoor heat exchanger 4 and the throttling arrangement 5 that connect by routine; Throttling arrangement 5 is serially connected on the refrigerant pipeline between outdoor heat exchanger 1 and the indoor heat exchanger 4, is provided with two gears that above flow varies in size that switch according to the different circulation patterns of compressor 3 and running frequency and outdoor environment temperature in the throttling arrangement 5; Wherein, the different circulation patterns of compressor are meant kind of refrigeration cycle and heat circulation.Air-conditioner also comprises compressor control loop that compressor 3 running frequencies are provided and the temperature sensor that detects outdoor environment temperature, and throttling arrangement 5 also comprises the controller of regulating gear.

Throttling arrangement 5 in the present embodiment comprises first valve body 6 with first cavity; First valve body 6 is provided with first import 6.1 and first outlet 6.2 that communicates with first cavity; Be provided with first base 8 that is used to cut off first import 6.1 and first outlet 6.2 in first cavity; First base 8 is provided with first aperture 9 and second aperture, 10, the first bases 8 that are communicated with first import 6.1 and first outlet 6.2 respectively and is provided with first slide block 7 that is used to seal first aperture 9 or second aperture 10.First slide block 7 places on first base 8, with 8 sliding-contacts of first base, can on first base 8, slide.One end of first slide block 7 and first spring 11 joins, and the inwall of the other end of first spring 11 and first cavity joins, and the side of first valve body 6 is provided with the flow of flow-rate ratio second aperture 10 of first slide block, 7 corresponding first coil, 12, the first apertures 9 little.

First coil 12 in the present embodiment places the outside of first valve body 6 and over against first slide block 7; The design internal diameter of first aperture 9 is less, and design discharge is equivalent to the flow that specification capillaceous is internal diameter Φ 1.5*1000mm; The design internal diameter of second aperture 10 is big slightly, and design discharge is equivalent to the flow that specification capillaceous is internal diameter Φ 1.5*600mm.

Spacing between first aperture 9 and second aperture 10 that is to say that less than the width of first slide block 7 first slide block 7 only can seal one of them in first aperture 9 and second aperture 10 in sliding process, and can not seal two simultaneously.

Throttling arrangement 5 in the present embodiment possesses two flows and can select; According to the result of the actual debugging of air-conditioning, with throttling arrangement 5 first retainings, just only the flow of conducting second aperture 10 keeps off; Flow design is equivalent to the flow that specification capillaceous is internal diameter Φ 1.5*600mm; With throttling arrangement 5 second retainings, conducting just is the flow retaining of conducting first aperture 9 only, and flow design is equivalent to the flow that specification capillaceous is internal diameter Φ 1.5*1000mm.

When controller was not given 12 energisings of first coil, under the thrust of first spring 11, first slide block 7 slided to left side as shown in Figure 2; So; First aperture 9 is sealed by

first slide block

7,10 conductings of second aperture, and the flow of the air-conditioning system of this moment is the flow of second aperture 10.

When controller is given 12 energisings of first coil; Because the magnetic force of first coil 12 is greater than the thrust of first spring 11; Then first slide block 7 slides to right side as shown in Figure 2 under the effect of magnetic force, so second aperture 10 is sealed by first slide block; 9 conductings of first aperture, this moment, the flow of air-conditioning system was the flow of first aperture 9.So just realized that throttling arrangement 5 has two retaining different flows.

The refrigeration frequency F1 and the temperature value T1 of preset compressor 3 in the kind of refrigeration cycle of air-conditioner; What heat in the circulation preset compressor 3 heats frequency F2 and temperature value T2; Refrigeration frequency F1 is 4～130Hz with the span that heats frequency F2, and the span of temperature value T1 and temperature value T2 is-20～60 ℃.

When air-conditioner moves, comprise the steps:

The first step, detect the operational mode of air-conditioner, the running frequency f and the outdoor environment temperature t of compressor 3: if be kind of refrigeration cycle, then got into for second step, if, then got into for the 5th step for heating circulation,

As running frequency f >=refrigeration frequency F1, too not high in order to guarantee air-conditioning system pressure because compressor frequency is higher with outdoor environment temperature during and outdoor environment temperature t >=temperature value T1, the choke valve of controller control is at this moment selected bigger first the keeping off of flow.

As running frequency f＜refrigeration frequency F1; And during outdoor environment temperature t＜temperature value T1; In order to guarantee that air-conditioning system has certain degree of superheat; Prevent the generation of compressor liquid hit phenomenon, simultaneously in order to improve the Energy Efficiency Ratio of air-conditioner when the low-frequency operation, the choke valve of controller control is at this moment selected the second less retaining of flow.

As running frequency f＜heat frequency F2; And during outdoor environment temperature t＜temperature value T2; In order to guarantee that air-conditioning system has certain degree of superheat; Prevent the generation of compressor liquid hit phenomenon, simultaneously in order to improve the Energy Efficiency Ratio of air-conditioner when the low-frequency operation, the choke valve of controller control is at this moment selected the second less retaining of flow.

Second embodiment

Referring to Fig. 1, Fig. 3 and Fig. 4; Throttling arrangement 5 comprises second valve body 16 with second cavity; Second valve body 16 is provided with second import 16.1 and second outlet 16.2 that communicates with second cavity; Be provided with second slide block 17 that changes second valve body, 16 flows in second cavity; Be provided with projection 17.1 on first on the sliding stroke that is positioned at second slide block 17 spacing 16.3 and second spacing 16.4, the second slide blocks 17 or second slide block 17 in second cavity between first spacing 16.3 and second spacing 16.4, the tapered or wedge shape in the end of second slide block 17; The end of second slide block 17 is positioned at the joint of second import 16.1 or second outlet, 16.2 and second inner chamber; One end of second slide block 17 and second spring 21 joins, and the inwall of the other end of second spring 21 and second cavity joins, and the side of second valve body 16 is provided with and second slide block, 17 corresponding second coils 22.First spacing 16.3 is positioned at second spacing 16.4 top.

Second coil 22 in the present embodiment places the outside of second valve body 16 over against second slide block 17.Second slide block 17 has the end of taper; The end of second slide block 17 is positioned at the joint of second import 16.1 and second inner chamber; The inwall of this end and second import 16.1 forms the circulation passage of an annular, and the area that changes this passage can change the flow of valve.

Throttling arrangement 5 in the present embodiment possesses two flows and can select; Result according to the actual debugging of air-conditioning; With the flow design of throttling arrangement 5 first retainings is to be equivalent to the flow that specification capillaceous is internal diameter Φ 2.1*700mm, and the flow design that throttling arrangement 5 second is kept off is to be equivalent to the flow that specification capillaceous is internal diameter Φ 2.1*1100mm.

When controller is not given 22 energisings of second coil; Then under the thrust of second spring 21; Second slide block upwards slides to first spacing 16.3 places of second valve body 16; Because the end of taper this moment and the annular circulation area that forms with the inwall of second import 16.1 are less, so the flow of air-conditioning system is less.

When controller is given 22 energisings of second coil; Because the magnetic force of second coil 22 is greater than the thrust of second spring 21; Then second slide block 17 slides to second spacing 16.4 places of second valve body 16 downwards under the effect of magnetic force; Because the annular circulation area that the inwall of end second import 16.1 of taper this moment forms is bigger, so the air-conditioning system flow is bigger.Realize that so throttling arrangement 5 has two retaining different flows.

All the other are not stated part and see first embodiment, no longer repeat.

More than be preferred implementation of the present invention, should be pointed out that above-mentioned preferred implementation should not be regarded as limitation of the present invention, protection scope of the present invention should be as the criterion with claim institute restricted portion.

Claims

1. air-conditioner; Comprise outdoor heat exchanger (1), cross valve (2), compressor (3), indoor heat exchanger (4) and throttling arrangement (5); Throttling arrangement (5) is serially connected between outdoor heat exchanger (1) and the indoor heat exchanger (4), it is characterized in that being provided with in the throttling arrangement (5) two gears that above flow varies in size that switch according to the different circulation patterns of compressor (3) and running frequency and outdoor environment temperature; Wherein, the different circulation patterns of compressor are meant kind of refrigeration cycle and heat circulation.

2. air-conditioner according to claim 1 is characterized in that said air-conditioner also comprises compressor control loop that compressor (3) running frequency is provided and the temperature sensor that detects outdoor environment temperature, and throttling arrangement (5) also comprises the controller of regulating gear.

3. air-conditioner according to claim 1 and 2; It is characterized in that said throttling arrangement (5) comprises first valve body (6) with first cavity; First valve body (6) is provided with first import (6.1) and first outlet (6.2) that communicates with first cavity; Be provided with first base (8) that is used to cut off first import (6.1) and first outlet (6.2) in first cavity; First base (8) is provided with first aperture (9) and second aperture (10) that is communicated with first import (6.1) and first outlet (6.2) respectively; First base (8) is provided with first slide block (7) that is used to seal first aperture (9) or second aperture (10), and first slide block (7) joins with an end of first spring (11), and the other end of first spring (11) and the inwall of first cavity join; The side of first valve body (6) is provided with and corresponding first coil of first slide block (7) (12), and the flow of flow-rate ratio second aperture (10) of first aperture (9) is little.

4. air-conditioner according to claim 3 is characterized in that spacing between said first aperture (9) and second aperture (10) is less than the width of first slide block (7).

5. air-conditioner according to claim 1 and 2; It is characterized in that said throttling arrangement (5) comprises second valve body (16) with second cavity; Second valve body (16) is provided with second import (16.1) and second outlet (16.2) that communicates with second cavity; Be provided with second slide block (17) that changes second valve body (16) flow in second cavity; Be provided with first on sliding stroke that is positioned at second slide block (17) spacing (16.3) and second spacing (16.4) in second cavity, the projection (17.1) on second slide block (17) or second slide block (17) is positioned between first spacing (16.3) and second spacing (16.4), the tapered or wedge shape in end of second slide block (17); The end of second slide block (17) is positioned at the joint of second import (16.1) or second outlet (16.2) and second inner chamber; Second slide block (17) joins with an end of second spring (21), and the other end of second spring (21) and the inwall of second cavity join, and the side of second valve body (16) is provided with and corresponding second coil of second slide block (17) (22).

6. air-conditioner control method according to claim 1; The refrigeration frequency F1 and the temperature value T1 that it is characterized in that preset compressor (3) in the kind of refrigeration cycle of air-conditioner; What heat in the circulation preset compressor (3) heats frequency F2 and temperature value T2, when air-conditioner moves, comprises the steps:

The first step, detect the operational mode of air-conditioner, the running frequency f and the outdoor environment temperature t of compressor (3): if be kind of refrigeration cycle, then got into for second step, if, then got into for the 5th step for heating circulation,

7. air-conditioner control method according to claim 6 is characterized in that said refrigeration frequency F1 and the span that heats frequency F2 are 4～130Hz, and the span of temperature value T1 and temperature value T2 is-20～60 ℃.