阅读说明：本技术 一种换热装置及其控制方法、控制装置 (A kind of heat-exchanger rig and its control method, control device ) 是由 石丽华 夏兴祥 高永坤 曹法立 于 2019-08-14 设计创作，主要内容包括：本发明实施例公开了一种换热装置及其控制方法、控制装置,涉及热交换领域,本发明实施例能够在空调进行除霜时,保证各排微通道换热器除霜的同步性,减少热量浪费。该换热装置,包括：多排微通道换热器,多个第一可控阀门以及多个第二可控阀门；其中,多个第一可控阀门、多个第二可控阀门,分别与多排微通道换热器中的各排微通道换热器一一对应；多排微通道换热器的液管,分别通过多个第一可控阀门,连接至空调的节流装置；多排微通道换热器的液管,还分别通过多个第二可控阀门,连接至空调的压缩机出气口；多排微通道换热器的集气管,分别连接至空调的四通阀。本发明应用于热交换。(The embodiment of the invention discloses a kind of heat-exchanger rig and its control methods, control device, are related to field of heat exchange, and the embodiment of the present invention can guarantee the synchronism of each row's micro-channel heat exchanger defrosting, reduce heat waste when air-conditioning is defrosted.The heat-exchanger rig, comprising: multiple rows of micro-channel heat exchanger, multiple first controllable valves and multiple second controllable valves；Wherein, multiple first controllable valves, multiple second controllable valves are corresponded with each row's micro-channel heat exchanger in multiple rows of micro-channel heat exchanger respectively；The liquid pipe of multiple rows of micro-channel heat exchanger is connected to the throttling set of air-conditioning respectively by multiple first controllable valves；The liquid pipe of multiple rows of micro-channel heat exchanger is also connected to the compressor outlet of air-conditioning by multiple second controllable valves respectively；The gas collecting tube of multiple rows of micro-channel heat exchanger is respectively connected to the four-way valve of air-conditioning.The present invention is applied to heat exchange.)

1. a kind of heat-exchanger rig, applied to carrying out outdoor heat exchange in air-conditioning characterized by comprising multiple rows of micro-channel heat exchanger, Multiple first controllable valves and multiple second controllable valves；

Wherein, the multiple first controllable valve, the multiple second controllable valve, respectively with multiple rows of micro-channel heat exchanger In each row's micro-channel heat exchanger correspond；

The liquid pipe of multiple rows of micro-channel heat exchanger is connected to the air-conditioning respectively by the multiple first controllable valve Throttling set；The liquid pipe of multiple rows of micro-channel heat exchanger is also connected to described by the multiple second controllable valve respectively The compressor outlet of air-conditioning；

The gas collecting tube of multiple rows of micro-channel heat exchanger, is respectively connected to the four-way valve of the air-conditioning.

2. heat-exchanger rig according to claim 1, which is characterized in that first controllable valve specifically includes solenoid valve；Institute It states the second controllable valve and specifically includes electric expansion valve；The throttling set, specifically include for heat-exchanger rig in junction chamber with The electric expansion valve of the heat-exchanger rig.

3. a kind of control method, which is characterized in that for controlling the heat-exchanger rig as provided by claims 1 or 2；The method Include:

Obtain default control instruction；The default control instruction, for making air-conditioning enter defrosting mode；

It is instructed in response to the default control, closes throttling set and multiple first controllable valves, and according to multiple rows of microchannel The Header temperature of heat exchanger controls the aperture of each second controllable valve in multiple second controllable valves.

4. control method according to claim 3, which is characterized in that the gas collection tube temperature according to multiple rows of micro-channel heat exchanger Degree controls the aperture of each second controllable valve in multiple second controllable valves, specifically includes:

Successively calculate the Header temperature of each micro-channel heat exchanger and target temperature threshold value in multiple rows of micro-channel heat exchanger Difference；Wherein, the target temperature threshold value is the average value of the Header temperature of presently described multiple rows of micro-channel heat exchanger；

If the difference of the Header temperature of target micro-channel heat exchanger and the average value is greater than first threshold, the mesh is controlled The corresponding second controllable valve aperture of mark micro-channel heat exchanger becomes smaller；If the Header temperature of the target micro-channel heat exchanger with The difference of the average value is less than second threshold, then controls the corresponding second controllable valve aperture of the target micro-channel heat exchanger Become larger；Wherein, the target micro-channel heat exchanger is row's micro-channel heat exchanger in multiple rows of micro-channel heat exchanger；Its In, the first threshold is greater than the second threshold.

5. control method according to claim 3, which is characterized in that it is described to be instructed in response to the default control, close section Device and multiple first controllable valves are flowed, and controllable according to the Header temperature of multiple rows of micro-channel heat exchanger control multiple second The aperture of each second controllable valve in valve, specifically includes:

After getting the default control instruction, throttling set and multiple first controllable valves are closed, and control described more The aperture of each second controllable valve is to default initial opening in a second controllable valve；

Obtain the Header temperature of presently described multiple rows of micro-channel heat exchanger；

Calculate the average value of the Header temperature of presently described multiple rows of micro-channel heat exchanger；

Periodically calculate the Header temperature of i-th row's micro-channel heat exchanger and the difference of the average value；If i-th row is micro- logical The difference of the Header temperature of road heat exchanger and the average value is greater than first threshold, then controls the i-th row Thermal Performance of Micro Channels The corresponding second controllable valve aperture of device becomes smaller；If the Header temperature of the i-th row micro-channel heat exchanger and the average value Difference be less than second threshold, then control the corresponding second controllable valve aperture of the i-th row micro-channel heat exchanger and become larger；Its In, it is every to pass through a cycle, i=i+1；If i=m in one cycle, i=1 is enabled in next cycle；M is described multiple rows of The number of rows of micro-channel heat exchanger；Wherein, the first threshold is greater than the second threshold.

6. a kind of control device, which is characterized in that for controlling the heat-exchanger rig as provided by claims 1 or 2；The control Device specifically includes:

Acquiring unit, for obtaining default control instruction；The default control instruction, for making air-conditioning enter defrosting mode；

Control unit closes the throttling set and the multiple first controllably for instructing in response to the default control Valve, and can according in the multiple second controllable valve of the Header temperature of multiple rows of micro-channel heat exchanger control each second Control the aperture of valve.

7. control device according to claim 6, which is characterized in that described control unit is specifically used for described in successively calculating The difference of the Header temperature of each micro-channel heat exchanger and target temperature threshold value in multiple rows of micro-channel heat exchanger；Wherein, the mesh Temperature threshold is marked, is the average value of the Header temperature of presently described multiple rows of micro-channel heat exchanger；

Described control unit, if big also particularly useful for the difference of the Header temperature and the average value of target micro-channel heat exchanger In first threshold, then controls the corresponding second controllable valve aperture of the target micro-channel heat exchanger and become smaller；If the target is micro- The difference of the Header temperature of channel heat exchanger and the average value is less than second threshold, then controls the target Thermal Performance of Micro Channels The corresponding second controllable valve aperture of device becomes larger；Wherein, the target micro-channel heat exchanger is multiple rows of micro-channel heat exchanger In row's micro-channel heat exchanger；Wherein, the first threshold is greater than the second threshold.

8. control device according to claim 6, which is characterized in that described control unit is specifically used for:

After getting the default control instruction, the aperture of each second controllable valve in the multiple second controllable valve is controlled To default initial opening；

Obtain the Header temperature of presently described multiple rows of micro-channel heat exchanger；

Calculate the average value of the Header temperature of presently described multiple rows of micro-channel heat exchanger；

Periodically calculate the Header temperature of i-th row's micro-channel heat exchanger and the difference of the average value；If i-th row is micro- logical The difference of the Header temperature of road heat exchanger and the average value is greater than first threshold, then controls the i-th row Thermal Performance of Micro Channels The corresponding second controllable valve aperture of device becomes smaller；If the Header temperature of the i-th row micro-channel heat exchanger and the average value Difference be less than second threshold, then control the corresponding second controllable valve aperture of the i-th row micro-channel heat exchanger and become larger；Its In, it is every to pass through a cycle, i=i+1；If i=m in one cycle, i=1 is enabled in next cycle；M is described multiple rows of The number of rows of micro-channel heat exchanger；Wherein, the first threshold is greater than the second threshold.

9. a kind of air-conditioning, which is characterized in that the air-conditioning includes the heat-exchanger rig as provided by claims 1 or 2.

10. air-conditioning according to claim 9, which is characterized in that the air-conditioning further includes such as any one of claim 6 to 8 institute The control device of offer.

Technical field

The present invention relates to field of heat exchange more particularly to a kind of heat-exchanger rig and its control methods, control device.

Background technique

Compared to traditional finned tube exchanger, there is micro-channel heat exchanger higher heat exchange efficiency, lower refrigerant to fill The features such as fluence, more compact structure, lower cost and lighter weight.Therefore, micro-channel heat exchanger has been in recent years Gradually it is applied to refrigeration equipment, such as air-conditioning, Teat pump boiler field.

And since the structure of micro-channel heat exchanger itself limits, compared to traditional finned tube exchanger, microchannel is changed Hot device is serving as evaporator in use, then there is condensed water excludes the puzzlements such as unsmooth, the easy frosting of fin surface, heat pamp length.

Therefore, how fast and efficiently to defrost to micro-channel heat exchanger, then become one in the art and need to solve The problem of.

Summary of the invention

The embodiment of the present invention provides a kind of heat-exchanger rig and its control method, control device, can be removed in air-conditioning It when white, will defrost in the high temperature refrigerant input micro-channel heat exchanger of compressor discharge, and can second can by control The aperture of valve is controlled, and then controls high temperature refrigerant and enters the uninterrupted of each row's micro-channel heat exchanger, to guarantee that each row is micro- logical The synchronism of road heat exchanger defrosting, reduces heat waste.

In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that

In a first aspect, the embodiment of the present invention provides a kind of heat-exchanger rig, it is used for air-conditioner outdoor unit, comprising: multiple rows of microchannel Heat exchanger, multiple first controllable valves and multiple second controllable valves；Wherein, multiple first controllable valves, multiple second can Valve is controlled, is corresponded respectively with each row's micro-channel heat exchanger in multiple rows of micro-channel heat exchanger；Multiple rows of micro-channel heat exchanger Liquid pipe is connected to the throttling set of air-conditioning respectively by multiple first controllable valves；The liquid pipe of multiple rows of micro-channel heat exchanger, also Respectively by multiple second controllable valves, it is connected to the compressor outlet of air-conditioning；The gas collecting tube of multiple rows of micro-channel heat exchanger, point It is not connected to the four-way valve of air-conditioning.

Second aspect, the embodiment of the present invention also provide a kind of control method, change as provided by first aspect for controlling Thermal；This method specifically includes: obtaining default control instruction；Default control instruction, for making air-conditioning enter defrosting mode；It rings It should be instructed in default control, close throttling set and multiple first controllable valves, and according to the collection of multiple rows of micro-channel heat exchanger Tracheae temperature controls the aperture of each second controllable valve in multiple second controllable valves.

The third aspect, the embodiment of the present invention provide a kind of control device, for controlling as provided by above-mentioned first aspect Heat-exchanger rig；This method specifically includes: acquiring unit, for obtaining default control instruction；Default control instruction, for making air-conditioning Into defrosting mode；Control unit closes throttling set and multiple first controlled valves for instructing in response to default control Door, and opening for each second controllable valve in multiple second controllable valves is controlled according to the Header temperature of multiple rows of micro-channel heat exchanger Degree.

Fourth aspect, the embodiment of the present invention also provide a kind of air-conditioning, including the dress that exchanges heat as provided by claims 1 or 2 It sets.

In heat-exchanger rig provided by the embodiment of the present invention, heat exchange is improved by the way that multiple rows of micro-channel heat exchanger is arranged first Efficiency.Further, each micro-channel heat exchanger respectively corresponds the first of individually connection throttling set in the embodiment of the present invention Controllable valve and the second controllable valve of connect compressor gas outlet.To defrosted in the way of hot-gas bypass When, the high temperature refrigerant for capableing of the discharge of independent control compressor enters the uninterrupted of each micro-channel heat exchanger, each in order to control The synchronism of micro-channel heat exchanger defrosting is arranged, heat waste is reduced.

Detailed description of the invention

In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment and description of the prior art Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the invention Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Obtain other attached drawings.

Fig. 1 is a kind of schematic cross-section of micro-channel heat exchanger provided in an embodiment of the present invention；

Fig. 2 is a kind of structural schematic diagram of air-conditioner outdoor unit provided in an embodiment of the present invention；

Fig. 3 is a kind of structural schematic diagram of heat-exchanger rig provided in an embodiment of the present invention；

Fig. 4 is the structural schematic diagram of another heat-exchanger rig provided in an embodiment of the present invention；

Fig. 5 is a kind of flow diagram of control method provided in an embodiment of the present invention；

Fig. 6 is the flow diagram of another control method provided in an embodiment of the present invention；

Fig. 7 is the flow diagram of another control method provided in an embodiment of the present invention；

Fig. 8 is a kind of structural schematic diagram of control device provided in an embodiment of the present invention；

Fig. 9 is the structural schematic diagram of another control device provided in an embodiment of the present invention；

Figure 10 is the structural schematic diagram of another control device provided in an embodiment of the present invention.

Appended drawing reference:

01- fin；02- flat tube；10- air-conditioner outdoor unit；101- gas-liquid separator；102- compressor；103- four-way valve； 104- hot-gas bypass electronic valve；105- outdoor heat exchanger；106- outdoor fan；107- high-pressure reservoir；108- outdoor electrical is swollen Swollen valve；The gas side 109- shut-off valve；110- liquid side shut-off valve；20- heat-exchanger rig；The multiple rows of micro-channel heat exchanger of 201-；201a- is micro- logical Road heat exchanger；201b- micro-channel heat exchanger；More the first controllable valves of 202-；The first controllable valve of 202a-；202b- first can Control valve；More the second controllable valves of 203-；The second controllable valve of 203a-；The second controllable valve of 203b-；The more a temperature of 204- Detection device；204a- temperature-detecting device；204b- temperature-detecting device.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Term " first ", " second " be used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or Implicitly indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or imply Ground includes one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or It is more than two.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected.It is right For those skilled in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.In addition, When pipeline is described, used " connected ", " connection " are then with the meaning be connected in the present invention.Specific meaning needs to tie It closes and is hereafter understood.

Firstly, inventive principle of the invention is introduced:

Since micro-channel heat exchanger has higher heat exchange efficiency, lower refrigerant charge, more compact structure, more The features such as low cost and lighter weight, therefore this technology is widely used in air conditioning for automobiles industry always.In recent years, With theoretical research and being constantly progressive for technology is fabricated, micro-channel heat exchanger is also gradually used in other refrigeration equipments In, such as domestic air conditioning, Teat pump boiler field.

But since the heat exchanger of this structure of micro-channel heat exchanger is there is also the defect in some structures, it is caused to use In will appear some problems.Specifically, micro-channel heat exchanger uses PARALLEL FLOW flat tube, the contact surface between condensed water and heat exchanger Larger with contact angle, this condensed water for allowing for heat exchanger surface is not easy to be discharged.For micro-channel heat exchanger, due to its entry/exit Mouth header is generally horizontal positioned, and fin is stand-alone assembly installation, and vertical direction is caused to there is no continuous fin.Tool Body, as shown in Figure 1, being a kind of schematic cross-section of micro-channel heat exchanger, wherein micro-channel heat exchanger includes fin 01 and flat 02 two parts of pipe, wherein fin 01 and flat tube 02 are combined together using orthogonal staggeredly combination, due to flat tube and Fin is all flat structure, therefore when there is condensed water formation, the condensed water of heat exchanger surface is not easy to be discharged.Thus by microchannel Heat exchanger will receive the puzzlement that condensed water excludes unsmooth, the easy frosting of fin surface, defrost time length when being used as evaporator with heat pump.

Especially in multiple rows of micro-channel heat exchanger, due to respectively arranging micro-channel heat exchanger in multiple rows of micro-channel heat exchanger The problems such as synchronism that defrosts is poor, and the naturally occurring above-mentioned frosting degree of micro-channel heat exchanger is big in addition, defrosting is difficult, is further exacerbated by The waste of heat, significantly impacts the heat capacity and user's comfort of air-conditioning when defrosting.

Based on above-mentioned technical problem, is found in the present invention, lead to the original of the defrosting poor synchronization of multiple rows of micro-channel heat exchanger Because being mainly: in the usage scenario of multiple micro-channel heat exchangers, each microchannel of arranging generally is used along air-flow direction (i.e. wind The blowing direction of machine) each row's micro-channel heat exchanger is arranged side by side.This result in flowing along air multiple rows of heat exchanger air quantity and Heat transfer temperature difference is gradually reduced, and causes the exchange capability of heat of interior row's heat exchanger smaller, and the refrigerant for distributing to interior row's heat exchanger is on the low side, into And cause the defrosting speed of interior row's heat exchanger slow.Therefore, after outlet frost eliminates, the heat obtained can only be used to heat pipeline With residual water, and at this time in row's heat exchanger also need more heats to defrost, this is hot for natively limited defrosting It is a part of greatly waste for amount.

Especially under the scene of hot gas bypass defrosting, the case where heat waste can be aggravated.Specifically, presently the most common Defrost mode be inverse defrosting.Four-way valve commutates when defrost, defrosts from indoor absorption heat, while to avoid out cold wind, Indoor heat exchanger fan will be out of service when defrosting, therefore that there are heating performances is poor for inverse defrosting, and air-flow is made an uproar when four-way valve commutates The disadvantages of sound is big has seriously affected the comfort of user.And hot gas bypass defrosting, then it is that the exhaust of compressor is directly entered outdoor Heat exchanger defrosts, since indoor unit need not switch refrigerant flow direction during heating and defrosting under the mode, so that removing Indoor unit can still maintain the condition of high temperature in frost, and the leaving air temp of indoor machine during heating can be with fast lifting, machine again after defrosting The whole heating capacity of group and thermal comfort characteristic are good.But due to hot gas bypass defrosting utilize be compressor body heat, defrosting Time is generally longer.For multiple rows of parallel micro-channel heat exchanger, when unevenly will lead to heat waste due to defrosting, and defrosting Between it is long can aggravate this phenomenon, thus it is undesirable using effect when hot gas bypass defrosting.

It illustratively, is a kind of structural schematic diagram of air-conditioner outdoor unit such as Fig. 2.Wherein, which includes: Gas-liquid separator 101, compressor 102, four-way valve 103, hot-gas bypass electric expansion valve (electronic expansion Valve of discharge, EVD) 104, outdoor heat exchanger 105, outdoor fan 106, high-pressure reservoir 107, outdoor electrical it is swollen Swollen valve 108, gas side shut-off valve 109, liquid side shut-off valve 110.Wherein, outdoor electrical expansion valve 108 is the throttling set of air-conditioning.In In some implementations, the function that the throttling sets such as capillary realize outdoor electrical expansion valve 108 also can be used.

Wherein, under refrigerating state, refrigerant is from indoor heat exchanger (not shown) by gas side shut-off valve 109, four-way Valve 103 flows into gas-liquid separator 101.Gaseous refrigerant is inputted compressor 102 by gas-liquid separator 101, and refrigerant is through compressor 102, the gas collecting tube that four-way valve 103 flows to outdoor heat exchanger 105 is exported and passed through after compression from the gas outlet of compressor 102.It is cold After matchmaker condenses in outdoor heat exchanger 105, from the liquid pipe of outdoor heat exchanger 105 export, and by high-pressure reservoir 107, Outdoor electrical expansion valve 108, liquid side shut-off valve flow to indoor heat exchanger, complete refrigeration cycle.

Under heating state, refrigerant flows into gas-liquid separator from 105 gas collecting tube of outdoor heat exchanger, by four-way valve 103 101.Gaseous refrigerant is inputted compressor 102 by gas-liquid separator 101, and refrigerant is after the compression of compressor 102 from compressor 102 Gas outlet exports and passes through four-way valve 103, gas side shut-off valve 10 flows to indoor heat exchanger.The refrigerant interior evaporation of heat exchanger indoors is inhaled After heat, the liquid pipe of outdoor heat exchanger 105 is entered by liquid side shut-off valve 110, outdoor electrical expansion valve 108, completes heating circulation.

When being defrosted using hot-gas bypass mode, the high temperature and pressure refrigerant of 102 gas outlet of compressor output, then directly Outdoor heat exchanger 105 is flowed by hot-gas bypass electronic valve 104, and then outdoor heat exchanger 105 is carried out using the temperature of refrigerant Defrosting.But due to hot gas bypass defrosting utilize be compressor body heat, defrosting time is generally longer.Therefore, work as outdoor When heat exchanger 105 is using multiple rows of micro-channel heat exchanger, since defrosting unevenly will lead to heat waste, when further extending defrosting Between.

Therefore, existing due to removing when for being defrosted using hot gas bypass defrosting mode in the embodiment of the present invention The white time is long, therefore is further exacerbated by multiple rows of micro-channel heat exchanger and respectively accompanies the non-uniform problem of the defrosting of micro-channel heat exchanger, Propose following solution.