CN101248319A - System reheating control using width pulse modulation - Google Patents

System reheating control using width pulse modulation Download PDF

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Publication number
CN101248319A
CN101248319A CN 200580051371 CN200580051371A CN101248319A CN 101248319 A CN101248319 A CN 101248319A CN 200580051371 CN200580051371 CN 200580051371 CN 200580051371 A CN200580051371 A CN 200580051371A CN 101248319 A CN101248319 A CN 101248319A
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CN
China
Prior art keywords
reheat
valve
condenser
refrigerant
refrigeration system
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CN 200580051371
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Chinese (zh)
Inventor
A·利夫森
M·F·塔拉斯
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开利公司
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Application filed by 开利公司 filed Critical 开利公司
Priority to PCT/US2005/030603 priority Critical patent/WO2007024237A1/en
Publication of CN101248319A publication Critical patent/CN101248319A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/153Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04Refrigeration circuit bypassing means
    • F25B2400/0403Refrigeration circuit bypassing means for the condenser
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2521On-off valves controlled by pulse signals

Abstract

一种包括再热回路的制冷系统。 A refrigeration system reheat circuit. 提供脉宽调制控制以获得可变的再热能力,这样在由该制冷系统调节的环境中能满足宽范围的温度和湿度水平。 Providing pulse width modulated control to reheat the ability to obtain variable, so that by adjusting the refrigeration system environment to meet a wide range of temperature and humidity levels. 提供给再热流量控制装置的脉宽调制信号实现了逐步增加的再热量,同时避免空调空间内的温度和湿度的变化。 Pulse width modulation signals supplied to the reheat flow control device is achieved and then gradually increasing the amount of heat, while avoiding changes in temperature and humidity in the air-conditioned space.

Description

利用脉宽调制的系统再热控制技术领域本发明涉及一种脉宽调制控制器,可乡飾U7令系统提供连续的或精确步进的再热能力(reheat capacity)o 背景技术制冷系统具有广泛的用途,例如用于调节环境。 Pulse width modulation control system reheat Technical Field The present invention relates to a PWM controller, can cause the system to provide rural decorated U7 precise stepwise or continuous reheat capability (reheat capacity) o BACKGROUND refrigeration system having a wide purposes, for example for adjusting the environment. 空调和热泵用于制7令和/ 或加热进入环境中的空气。 Heat pump system for air conditioning and order 7 and / or heat air entering the environment. 环境的制冷或加热负荷会因为周围环境条化变化, 并且也会因为环境居住者要求的^^和/或Sjt7K平的变化而z变化。 Cooling or heating load on the environment because of changes in ambient environmental conditions, and also because of changes ^^ and / or flat Sjt7K environmental requirements and z occupants change. 显然,制冷系统的运行和控制必须充分地反映这些变化以在环境中保持稳定的温度和湿度綠在某些情况下,当系统在制冷模式下运行时,为了在空调空间内提供舒适的环境,室内空气流的温度可能需要高于能提供理想湿度水平的温度。 Obviously, the refrigerant system operation and control have to adequately reflect these changes to maintain stable temperature and humidity in the environment in some cases green, when the system is operating in the cooling mode, in order to provide a comfortable environment in a conditioned space, temperature of the indoor air flow may be required to provide a temperature above the desired humidity level. 另一方面,S31降低空气流的^^,更多的水分能从空气中移出。 On the other hand, S31 ^^ reduced air flow, more moisture from the air removed. 这些矛盾给制冷系统的设计者们带来了挑战。 These contradictory to the refrigeration system designers a challenge. 解决这种挑战的一种方法是运用各种各样的采用再热盘管的模式。 One way to address this challenge is to use a variety of patterns using reheat coil. 在多数瞎况下,再热盘管被布置在蒸发器下游的室内空气流路径中,是为了用来加热在蒸发器内冷却且在该处移出了水分后供应至空调空间的空气。 In many blind conditions, the reheat coil is disposed in the indoor air flow path downstream of the evaporator, is cooled in order to supply heat in the evaporator, and where the moisture is removed to the air conditioning space. 在现有的技术中,控制^M编程以随意地执行再热功能。 In the conventional art, the control ^ M programmed to perform arbitrarily reheat. 但是,由再热回路提供的能力是阶段增加或减少的。 However, the capabilities provided by reheat circuit is increased or decreased in stages. 期望的是在这些离散的阶段之间能够提供可变的再热能力和总的系统性能。 Desirable to be able to provide variable between these discrete stages reheat capability and overall system performance. 尽管在制冷系统中可根据不同的目的提供脉宽调制控制器,但是脉宽调制控审擺并没有被用于提供阶段变化的再热能力。 While the pulse width modulation controller may be provided for different purposes in a refrigeration system, a pulse width modulation-controlled trial but does not put reheat capability is used to provide phase change. 发明内容在本发明公开的实施例中,提供脉宽调制控制以选择性地改变由再热回路提供的能力,从而改«^系统的性能。 SUMMARY Embodiments of the present invention disclosed in the embodiment, pulse width modulation control provided to selectively change the capabilities provided by the reheat circuit, thereby improving «^ performance of the system. "打开/关闭"循环的时间间隔是可选的, 以至于系统热惯性对系统的整体影响在关于外部运行特性上是可以忽略的。 "On / Off" cycle time interval is optional, so that the overall impact of the system thermal inertia of the system in regard to the external operating characteristics is negligible. 也就是说,空调环境的居住者将不会意识到流向再热回路的制7令剂流被定期的打开和关闭。 That is, the air-conditioned environment of the occupants will not be aware of the flow of the reheat system circuit 7 so that the coolant flow is periodically opened and closed. 在不同的实施例中,操作控制器以改^Jt冲的宽度,从而为流体控制装置获得期望的时间间隔,例如,该流体控制體是被打开来引导制冷剂流向再热热交换器的阀。 In various embodiments, the operation of the controller to change a width ^ Jt punch, so as to obtain a fluid control device desired time interval, e.g., the fluid control member is opened to direct the flow of the refrigerant heat exchanger and then valve . 通ai^种方式,可以拥有宽范围的再热能力,并能提供可变的再热控制。 On ai ^ ways, you can have a wide range of reheat capability, and can provide a variable reheat control. 在特别的模式中,本发明也提供有一回路,该回路使冷凝器周围的制冷剂旁通,从而使再热功能和控制的操作更加灵活。 In a particular mode, the present invention also provides Once passage, the refrigerant bypass circuit around the condenser, so that the operation and control of the reheat more flexible. 通过随后的描述和附图可以更好的理解本发明的这些和其他特征,下面是附图的简要描述。 These will be better understood and other features, the following is a brief description of the present invention by the following description and accompanying drawings. 附图说明图1 ^第一示意图。 BRIEF DESCRIPTION OF schematic diagram of a first 1 ^. 图2表示第二示意图。 FIG 2 shows a second schematic. 具体实施方式如图1所示的制冷系统20包括压縮机22,其压縮制冷剂并将其传送到下游的冷凝器24。 Refrigeration system 1 shown in FIG. 20 embodiment DETAILED DESCRIPTION includes a compressor 22 that compresses the refrigerant and transferred to the condenser 24 downstream. 风扇25使风吹过冷凝器24。 25 that the wind blowing through the condenser fan 24. 制冷剂流经冷凝器24到达下游的膨胀装置26,然后经过蒸发器28,最后回至lj压缩机22。 The refrigerant flowing through the condenser 24 to a downstream expansion device 26, and then passes through the evaporator 28 and finally back to the compressor 22 lj. 如图所示,HM阀30 位于压縮机22和冷凝器24之间的制冷剂排出管路上。 As shown, HM valve 30 of the refrigerant between the compressor 24 and the condenser discharge line 22. 基于某种目的,31阀30由控制器38控制,该目的将在下面描述。 Based on some object, 31 by the controller 38 controls the valve 30, the purpose of which will be described below. 当HS阀打开时,制冷齐嗵过再热热交换器34和开关阀35,然后返回位置31 ,位置31仍然位于冷凝器24的上游。 When the valve is open HS, tom homogeneous cooling heat exchanger 34 through the reheater and a switching valve 35, and the return position 31, position 31 is still positioned upstream of the condenser 24. 已知的是,WI36^H吹过蒸发器28,再热热効奂器34被布置以使其位于蒸发器28后的空气^S各径中。 It is known that, WI36 ^ H blown through the evaporator 28, and then hot efficiency Hwan 34 is disposed to be located after the evaporator air 28 ^ S in each path. 再热热交换器34是为了允许蒸发器28将流经其中的空气冷却至U—定皿, 该》显度比环境居住者期望的并M3i自动调温器32要求的温度低,从而将足量的水分从空气中移出并在环境中保持期望的湿度水平。 Reheat heat exchanger 34 is provided to allow the air flowing through the evaporator 28 is cooled therein to U- dish is, the low temperature "significant degree than desired occupants and environmental requirements M3i 32 thermostat, so that the foot amount of water removed from the air and maintaining a desired humidity level in the environment. 流经蒸发器28的低温空气导致更多的7jC分从空气中移出。 Cryogenic air through the evaporator 28 results in more sub 7jC removed from the air. 然后空气通过再热热交换器34,并被再热到期望的温度。 Air is then reheated by the heat exchanger 34, and is reheated to a desired temperature. 通^种方式,再热回路的运用为空调环境提供了期望的温度水平和湿度水平。 ^ Ways through the use reheat circuit provides the desired temperature levels and humidity level of air-conditioned environment. 控制器38将脉宽调制信号发送到阀30。 The controller 38 transmits the PWM signal to the valve 30. 阀30是Ha阀,其典型的位于通常的打开位置(在冷却模式运行期间)以^AH缩机22出来的制冷剂直接达到冷凝器24,阀30也可切换到交替位置(在再热模式运行期间),在该位置时,阀30 使从压缩机22出来的制冷剂流经再热热交换器34后达到冷凝器24。 Ha valve 30 is a valve, which typically is in the normal open position (during cooling mode) ^ AH to the compressor 22, the refrigerant directly to the condenser 24, the valve 30 may be switched to the alternate position (in a reheat mode during operation), in this position, so that the valve 30 from the compressor 22 flows out of the refrigerant heat exchanger 34 and then reaches the condenser 24. 当由控制器38发送的脉宽调制信号超l胸30时,该脉宽调制信号将阀切换到该交割立置。 When the pulse width modulated signal 30 is transmitted by the controller 38 over the chest l, the PWM signal is switched to the delivery valve upright. 既然控制器38决定期望的再热能力,那么控制器就能够决定脉冲的宽度和发送到阀30的脉冲之间的时间间隔,从而阀30能精确地位于打开位置一定时间,以提供期望的再热能力。 Since the controller 38 then determines a desired heating capacity, the controller can decide the pulse width and pulse transmission time between the intervals of the valve 30, so that the valve 30 in the open position can be accurately predetermined time, and then to provide the desired heating capacity. 以这种方式,非常合适的再热能力被提供, 空调环境中的温度和湿度被精确控制。 In this manner, a very suitable reheat capability is provided, the air-conditioned environment humidity and temperature are accurately controlled. 这样,本发明提供了一种相对便宜和有效的方法,该方法提供了本质上具有无穷个再热阶段的可变的再热功能。 Thus, the present invention provides a relatively cheap and effective method of providing a variable reheat having an infinite number of stages of the reheater in nature. 图2显示了另一实施例37,其和图1所示的实施例^j以,但是,其不具有HM阀,而题过脉宽调帶'腊号来控制传统的开/关电磁阀38和40。 Figure 2 shows another embodiment 37, and FIG. 1 embodiment to embodiment ^ j, but it does not have a valve HM, and had problems with the PWM 'wax No. conventional controlled on / off solenoid valve 38 and 40. 当再热支路起作用时,阀40打开,制冷剂从点100分流并回至i住回路的点102。 When reheated bypass function, the valve 40 is opened, the refrigerant diverted from point 100 to point and back to live circuit 102 i. 脉宽调制3I31类似于图1实施例中描述的方法控制。 The method described in the pulse width modulation control 3I31 similar to Figure 1 embodiment. 對以于图1中的HM阀30,阀40可以被打开和关闭以获得可变的再热能力。 In HM of the valve 30 in FIG. 1, the valve 40 may be opened and closed again in order to obtain a variable heating capacity. 阀38也可以被脉宽调制信号操作,并能控制与阀40连接的主制冷剂回路中的制冷剂流。 Valve 38 may be operated pulse width modulated signal, and to control the refrigerant flow is connected to the main refrigerant circuit 40 in the valve. 图2也示意性的提供了一,择,其包括冷凝器旁通管路42,该旁通管路舰旁通阀44以使冷凝器24周围的至少一部分制冷剂按照某一路径传送。 FIG 2 also provides a schematic, selection, including at least a portion of the refrigerant condenser bypass line 42, the bypass line bypass valve 44 so that the ship around the condenser 24 in accordance with a transmission path. 当需要除湿而几乎不需要冷却空气时,旁通阀44起作用。 When almost no dehumidification and cooling air bypass valve 44 acts. 旁通阀44的操作和控制是本领域的现有技术,但是,冷凝器旁通功能也可以由伴随有可变脉冲调制控帝啲脉宽调制信号操作,该可变脉冲调制控制用于再热回路本身,因此,冷凝器旁通功能在操作中提供了更多的灵活性以在制冷系统37所调节的环境中精确的获得期望的参数(在^S和湿度方面)。 The bypass control valve 44 and the operation of the prior art is the art, however, the condenser bypass function may also be accompanied by a variable pulse-modulated control pulse width modulated signal Di GOD operation, the variable pulse modulation control for re thermal circuit itself, and therefore, the condenser bypass feature provides more flexibility in operation to adjust the parameters in the refrigeration system 37 environment to achieve a desired accurate (in terms of humidity and ^ S). 显然,图1和图2所示的实施例都可以配置HS阀或一对电磁阀。 Obviously, the embodiment shown in FIG. 1 and FIG. 2 can be configured HS or a pair of solenoid valves. 而且, 尽管只公开了两个再热形式,但是,任何已知的再热模式都可魏于本发明。 Further, although only two reheat forms disclosed, but any known reheat mode of the present invention may WEI. 脉宽调制控制是已知的,由脉宽调制信号操作的阀也是已知的。 Pulse width modulation control are known, the valve operated by a pulse width modulated signal is also known. 但是,本发明以独特的方式运用了现有技术,从而达到了,的目的和益处。 However, the present invention is a unique way to use the prior art, so as to achieve, objects and advantages. 尽管本发明公开了优选实施例,本领域的普通技术人员会认识到在本发明的范围之内能进行一定程度的修改。 While the present invention discloses preferred embodiments, those of ordinary skill in the art will recognize that modifications can be to some extent within the scope of the present invention. 基于以上原因,随后的丰又利要求应当决定本发明真正的保护范围和内容。 For these reasons, the abundance and subsequent claims of the invention should decide the true scope and content.

Claims (17)

1. 一种制冷系统,包括: 压缩机,位于所述压缩机下游的冷凝器,位于所述冷凝器下游的膨胀装置,以及位于所述膨胀装置下游的蒸发器, 再热回路,所述再热回路通过再热热交换器选择性地接收制冷剂,空气运动装置,所述空气运动装置使空气通过所述蒸发器和所述再热热交换器, 控制器,所述控制器选择性地操作阀系统以使制冷剂通过所述再热热交换器,并且所述控制器可操作来运用脉宽调制信号,从而操作所述阀系统以获得温度和湿度控制水平,所述温度和湿度控制水平位于连续运行所述再热回路所到达的控制水平和没有运行所述再热回路所到达的控制水平之间。 1. A refrigeration system comprising: a compressor, a condenser positioned downstream of said compressor, a condenser positioned downstream of said expansion device, said expansion device and located downstream of the evaporator, reheat circuit, said re thermal circuit selectively receiving refrigerant through a reheat heat exchanger, an air moving means, said air moving means passing air through said evaporator and said reheat heat exchanger, a controller for selectively operating a valve system so that the refrigerant through said reheat heat exchanger and said controller is operable to use a pulse width modulation signal to operate the valve system to obtain a controlled temperature and humidity level, the temperature and humidity controlled level between the control level is between the level of control operation of the continuous reheat circuit is not running and reached by the reheat circuit is reached.
2. 如权利要求1所述的制冷系统,其特征在于,所述再热回路以相对于所述冷凝器串联流动的形式接收制冷剂。 The refrigeration system as recited in claim 1, wherein said reheat circuit to the condenser in series with respect to the flow of the refrigerant receiver.
3. 如权利要求2所述的制冷系统,其特征在于,所述再热回路从所述冷凝器的上游的位置接收制冷剂。 The refrigeration system of claim 2, wherein said reheat circuit receives refrigerant from a position upstream of said condenser.
4. 如权利要求2所述的制冷系统,其特征在于,所述再热回路从所述冷凝器的下游的位置接收制冷剂。 4. A refrigeration system according to claim 2, wherein said reheat circuit receives refrigerant from a location downstream of the condenser.
5. 如权利要求1所述的制冷系统,其特征在于,提供旁路,从而选择性地旁通所述y令凝器周围的至少一部,i」冷剂。 The refrigeration system as recited in claim 1, characterized in that, to provide the bypass, thereby selectively bypass around the condenser so that y is at least one, I "refrigerant.
6. 如权利要求5所述的制冷系统,其特征在于,所述旁路由脉宽调制阀控制。 The refrigeration system of claim 5, wherein said bypass valve is controlled by pulse width modulation.
7. 如权利要求1所述的制冷系统,其特征在于,所述再热回路由Hil阀控制。 The refrigeration system as recited in claim 1, wherein said reheat valve control loop is Hil.
8. 如权利要求1所述的制冷系统,其特征在于,所述阀系统包括至少一个阀。 The refrigeration system as recited in claim 1, wherein the valve system comprises at least one valve.
9. 如权利要求8所述的制冷系统,其特征在于,所述至少一个阀是Hffl阀。 9. A refrigeration system according to claim 8, characterized in that said at least one valve is a valve Hffl.
10. —种控制制7令系统的方法,包括如下步骤.-(1)提供压缩机、位于所述压縮机下游的冷凝器、位于所述冷凝器下游的膨胀装置、位于所述膨胀装置下游的蒸发器、通过再热热交换器选择性接收制冷剂的再热回路、以及使空气通a^述蒸发器和再热热効奂器的空气运动装置;以及(2)通,择性i&ig行所述再热回路以使制冷齐腿过所述再热热^J奂器来运行所述制冷系统,操作控制器以运用所述脉宽调制信号来操作阀系统,从而使制冷剂直接进入所述再热回路以提供位于运行所述再热回路和没有运行所述再热回路所提供的不连续水平之间的温度和湿度控制水平。 10. - Method to make seven kinds of control of the braking system, comprising the steps of - (1) providing a compressor, a condenser positioned downstream of said compressor, a condenser positioned downstream of said expansion device, said expansion device positioned downstream of the evaporator, through the heat exchanger and then selectively receiving refrigerant reheat circuit, and a ^ air through said evaporator and then filter hot Huan-efficient air-moving device; and (2) pass, Optional i & ig lines the reheat circuit to the refrigerant through the hot reheat homogeneous leg ^ J Hwan the refrigeration system is operated, the operation controller using said pulse width modulated signal to a valve operating system, so that the refrigerant flows directly from entering the reheat circuit to provide the reheat circuit is in the operating and not operating the reheat temperature and humidity level discontinuity between the level of control provided by the loop.
11. 如权利要求10所述的方法,还包括如下步骤:通过按照某一路径传送所述冷凝器周围的至少一部分制冷剂^^择性地旁通所述冷凝器。 11. The method according to claim 10, further comprising the step of: transmitting by following a path around said at least a part of the refrigerant condenser ^^ Optional bypassing the condenser.
12. 如权利要求ll所述的方法,其特征在于,所述旁通由脉宽调制阀控制。 12. The method according to claim ll, characterized in that the bypass valve is controlled by pulse width modulation.
13. 如权利要求10所述的方法,其特征在于,所述再热回路以相对于所述冷凝器串联流动的形式接收制冷剂。 13. The method according to claim 10, wherein said reheat circuit to the condenser in series with respect to the flow of the refrigerant receiver.
14. 如权利要求13所述的方法,其特征在于,所述再热回路Ai^述冷凝器的上游的位置接收制冷剂。 14. The method according to claim 13, wherein said reheat circuit Ai ^ position upstream of said condenser, the refrigerant receiver.
15. 如权利要求13所述的方法,其特征在于,所述再热回路AA^f述冷凝器的下游的位置接收制冷剂。 15. The method according to claim 13, wherein said reheat circuit AA ^ f location downstream of said condenser, the refrigerant receiver.
16. 如权利要求10所述的方法,其特征在于,所述阀系统包括至少一个阀。 16. The method according to claim 10, wherein said valve system comprises at least one valve.
17. 如权利要求16所述的方法,其特征在于,所述至少一个阀是HM阀。 17. The method according to claim 16, wherein said at least one valve is a valve HM.
CN 200580051371 2005-08-23 2005-08-23 System reheating control using width pulse modulation CN101248319A (en)

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EP1938026A4 (en) 2011-12-14

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