CN107270582A - The control method and heat pump of source pump - Google Patents
The control method and heat pump of source pump Download PDFInfo
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- CN107270582A CN107270582A CN201710433299.3A CN201710433299A CN107270582A CN 107270582 A CN107270582 A CN 107270582A CN 201710433299 A CN201710433299 A CN 201710433299A CN 107270582 A CN107270582 A CN 107270582A
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000004378 air conditioning Methods 0.000 abstract description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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Abstract
本发明属于空调设备领域，具体涉及一种热泵机组的控制方法和热泵系统。本发明旨在解决现有热泵机组的控制方法不能及时开启辅助加热装置，致使热泵机组制热效果差、能效比低的问题。为此目的，本发明提供了一种热泵机组的控制方法，在本发明的技术方案中，通过检测热泵机组的运行参数，能够实现对热泵机组工作状态的实时监测；然后根据检测到的运行参数，计算热泵机组的能效比，并且将所述能效比与设定阈值进行比较，以便检测热泵机组是否处于高效运行的状态；最后，根据对比结果选择性地调整热泵机组的运行程序，使得热泵机组能够时刻保持高效的运行状态以及良好的制热效果。
The invention belongs to the field of air conditioning equipment, and in particular relates to a control method of a heat pump unit and a heat pump system. The invention aims to solve the problem that the existing control method of the heat pump unit cannot turn on the auxiliary heating device in time, resulting in poor heating effect and low energy efficiency ratio of the heat pump unit. For this purpose, the present invention provides a control method for a heat pump unit. In the technical solution of the present invention, by detecting the operating parameters of the heat pump unit, real-time monitoring of the working state of the heat pump unit can be realized; and then according to the detected operating parameters , calculate the energy efficiency ratio of the heat pump unit, and compare the energy efficiency ratio with the set threshold, so as to detect whether the heat pump unit is in a high-efficiency operating state; finally, selectively adjust the operation program of the heat pump unit according to the comparison result, so that the heat pump unit It can maintain efficient operation and good heating effect at all times.
Description
技术领域technical field
本发明属于空调设备领域，具体涉及一种热泵机组的控制方法和热泵系统。The invention belongs to the field of air conditioning equipment, and in particular relates to a control method of a heat pump unit and a heat pump system.
背景技术Background technique
随着人们生活水平的不断提高，人们对生活环境也提出了越来越高的要求。为了维持舒适的环境温度，空调设备已经成为人们生活中必不可少的一种设备。具体地，现有空调设备大多使用的是热泵机组，热泵机组具有工作效率高、节能环保等优点。但是，当热泵机组外围的环境温度过低时，热泵机组的工作效率就会迅速降低，从而影响热泵机组的制热效果。为了保证良好的制热效果，很多热泵机组都设置有辅助加热装置，用于保证制热效果。With the continuous improvement of people's living standards, people have also put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature, air conditioners have become an essential device in people's lives. Specifically, most of the existing air conditioners use heat pump units, which have the advantages of high working efficiency, energy saving and environmental protection. However, when the ambient temperature around the heat pump unit is too low, the working efficiency of the heat pump unit will decrease rapidly, thereby affecting the heating effect of the heat pump unit. In order to ensure a good heating effect, many heat pump units are equipped with auxiliary heating devices to ensure the heating effect.
进一步地，当环境温度较低时，随着环境温度的逐渐降低，蒸发器的蒸发能力越来越差，产生的热量也越来越少，使得热泵机组的换热介质持续达不到预设温度，此时就需要开启辅助加热装置。现有的开启辅助加热装置的控制方法是：当换热介质的温度持续达不到预设温度时，判断所有机组是否都已启动；在开启所有机组仍然长时间无法达到预设温度的情况下，才会开启辅助电加热装置。但是，在未开启辅助加热装置之前，热泵机组已经长时间处于低效运行的状态，这样的控制方式不仅不能使得换热介质尽快达到预设温度，而且低效运行的热泵机组还会浪费更多的能源。Furthermore, when the ambient temperature is low, as the ambient temperature gradually decreases, the evaporation capacity of the evaporator becomes worse and worse, and the heat generated is less and less, so that the heat exchange medium of the heat pump unit continues to fail to reach the preset value. At this time, the auxiliary heating device needs to be turned on. The existing control method for turning on the auxiliary heating device is: when the temperature of the heat exchange medium continues to fall below the preset temperature, it is judged whether all the units have been started; , the auxiliary electric heating device will be turned on. However, before the auxiliary heating device is turned on, the heat pump unit has been in low-efficiency operation for a long time. Such a control method not only cannot make the heat exchange medium reach the preset temperature as soon as possible, but also wastes more energy.
相应地，本领域需要一种新的热泵机组的控制方法来解决上述问题。Correspondingly, there is a need in the art for a new control method for heat pump units to solve the above problems.
发明内容Contents of the invention
为了解决现有热泵机组的控制方法不能及时开启辅助加热装置，致使所述热泵机组在一段时间内的制热效果差、能效比低的问题，本发明提供了一种热泵机组的控制方法，所述控制方法包括下列步骤：检测所述热泵机组的运行参数；根据检测到的运行参数，计算所述热泵机组的能效比；将所述能效比与第一阈值进行对比；根据对比结果选择性地调整所述热泵机组的运行程序。In order to solve the problem that the existing heat pump unit control method cannot turn on the auxiliary heating device in time, resulting in poor heating effect and low energy efficiency ratio of the heat pump unit within a period of time, the present invention provides a control method for the heat pump unit. The control method includes the following steps: detecting the operating parameters of the heat pump unit; calculating the energy efficiency ratio of the heat pump unit according to the detected operating parameters; comparing the energy efficiency ratio with a first threshold; selectively selecting Adjust the operation program of the heat pump unit.
在上述热泵机组的控制方法的优选技术方案中，所述运行参数包括所述热泵机组的压缩机的运行电流以及换热介质的第一温度和第二温度。In a preferred technical solution of the control method of the heat pump unit, the operating parameters include the operating current of the compressor of the heat pump unit and the first temperature and the second temperature of the heat exchange medium.
在上述热泵机组的控制方法的优选技术方案中，所述第一温度为换热介质流入所述热泵机组时的温度，所述第二温度为换热介质流出所述热泵机组时的温度。In the preferred technical solution of the control method of the heat pump unit, the first temperature is the temperature when the heat exchange medium flows into the heat pump unit, and the second temperature is the temperature when the heat exchange medium flows out of the heat pump unit.
在上述热泵机组的控制方法的优选技术方案中，“根据对比结果选择性地调整所述热泵机组的运行程序”的步骤具体包括：如果所述能效比大于所述第一阈值，则保持所述热泵机组的运行程序不变。In the preferred technical solution of the control method of the heat pump unit described above, the step of "selectively adjusting the operation program of the heat pump unit according to the comparison result" specifically includes: if the energy efficiency ratio is greater than the first threshold, keep the The operating procedure of the heat pump unit remains unchanged.
在上述热泵机组的控制方法的优选技术方案中，“根据对比结果选择性地调整所述热泵机组的运行程序”的步骤具体包括：如果所述能效比小于或等于所述第一阈值，计算所述预设温度与所述第二温度的差值，并将所述差值与第二阈值进行对比；根据所述差值与所述第二阈值的对比结果，选择性地调整所述热泵机组的运行程序。In the preferred technical solution of the control method of the heat pump unit above, the step of "selectively adjusting the operation program of the heat pump unit according to the comparison result" specifically includes: if the energy efficiency ratio is less than or equal to the first threshold, calculate the the difference between the preset temperature and the second temperature, and compare the difference with a second threshold; and selectively adjust the heat pump unit according to the comparison result between the difference and the second threshold running program.
在上述热泵机组的控制方法的优选技术方案中，“根据所述差值与所述第二阈值的对比结果，选择性地调整所述热泵机组的运行程序”的步骤具体包括：如果所述差值大于所述第二阈值，则启动所述热泵机组的辅助加热装置，对换热介质进行加热。In the preferred technical solution of the control method of the heat pump unit described above, the step of "selectively adjusting the operation program of the heat pump unit according to the comparison result between the difference value and the second threshold value" specifically includes: if the difference If the value is greater than the second threshold, the auxiliary heating device of the heat pump unit is started to heat the heat exchange medium.
在上述热泵机组的控制方法的优选技术方案中，“根据所述差值与所述第二阈值的对比结果，选择性地调整所述热泵机组的运行程序”的步骤具体包括：如果所述差值小于或等于所述第二阈值，则保持所述热泵机组的运行程序不变。In the preferred technical solution of the control method of the heat pump unit described above, the step of "selectively adjusting the operation program of the heat pump unit according to the comparison result between the difference value and the second threshold value" specifically includes: if the difference value is less than or equal to the second threshold, then keep the operation program of the heat pump unit unchanged.
在上述热泵机组的控制方法的优选技术方案中，所述辅助加热装置为电加热器。In a preferred technical solution of the control method of the above heat pump unit, the auxiliary heating device is an electric heater.
在上述热泵机组的控制方法的优选技术方案中，所述换热介质为水。In a preferred technical solution of the control method of the heat pump unit described above, the heat exchange medium is water.
本发明还提供了一种热泵系统，包括热泵机组和用于控制所述热泵机组的控制器，所述控制器能够执行上述任一项优选技术方案中所述的热泵机组的控制方法。The present invention also provides a heat pump system, including a heat pump unit and a controller for controlling the heat pump unit, and the controller can execute the control method for the heat pump unit described in any one of the above preferred technical solutions.
本领域技术人员能够理解的是，在本发明的技术方案中，通过检测热泵机组的运行参数，能够实现对所述热泵机组工作状态的实时监测；然后根据检测到的运行参数，计算所述热泵机组的能效比，并且将所述能效比与第一阈值进行比较，以便检测所述热泵机组是否处于高效运行的状态；最后，根据对比结果选择性地调整所述热泵机组的运行程序，使得所述热泵机组能够时刻保持高效的运行状态以及良好的制热效果。Those skilled in the art can understand that, in the technical solution of the present invention, real-time monitoring of the working state of the heat pump unit can be realized by detecting the operating parameters of the heat pump unit; The energy efficiency ratio of the unit, and compare the energy efficiency ratio with the first threshold, so as to detect whether the heat pump unit is in a state of high-efficiency operation; finally, selectively adjust the operation program of the heat pump unit according to the comparison result, so that all The above-mentioned heat pump unit can maintain a high-efficiency operating state and a good heating effect at all times.
附图说明Description of drawings
图1是本发明的热泵机组的控制方法的主要步骤流程图。Fig. 1 is a flow chart of the main steps of the control method of the heat pump unit of the present invention.
图2是本发明的热泵机组的控制方法的优选实施例的步骤流程图。Fig. 2 is a flow chart of the steps of a preferred embodiment of the control method of the heat pump unit of the present invention.
具体实施方式detailed description
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。例如，尽管本申请中按照特定顺序描述了本发明的方法的各个步骤，但是这些顺序并不是限制性的，在不偏离本发明的基本原理的前提下，本领域技术人员可以按照不同的顺序来执行所述步骤。Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention. For example, although the various steps of the method of the present invention are described in a specific order in the present application, these orders are not limiting, and those skilled in the art can perform the steps in different orders without departing from the basic principles of the present invention. Follow the steps described.
基于背景技术中提出的现有的热泵机组的控制方法不能及时开启辅助加热装置，使得所述热泵机组不仅长时间处于低效运行的状态，从而造成能源的浪费，而且还导致换热介质无法快速达到预设温度，影响制热效果的问题。本发明提出了一种热泵机组的控制方法，所述控制方法通过实时检测所述热泵机组的运行参数，然后实时计算并比较所述热泵机组的能效比，从而实现对所述辅助加热装置的实时控制。不仅有效保证了所述热泵机组稳定的制热效果，而且还提高了所述热泵机组的工作效率。Based on the existing heat pump unit control method proposed in the background technology, the auxiliary heating device cannot be turned on in time, so that the heat pump unit is not only in a low-efficiency operation state for a long time, resulting in waste of energy, but also leads to the inability of the heat exchange medium to quickly Reaching the preset temperature will affect the heating effect. The present invention proposes a control method for a heat pump unit. The control method detects the operating parameters of the heat pump unit in real time, and then calculates and compares the energy efficiency ratio of the heat pump unit in real time, thereby realizing real-time control of the auxiliary heating device. control. It not only effectively ensures the stable heating effect of the heat pump unit, but also improves the working efficiency of the heat pump unit.
具体地，所述热泵机组设置有制热循环系统和换热介质循环系统，并且，所述制热循环系统包括压缩机、蒸发装置、冷凝装置和节流装置。所述换热介质循环系统能够利用换热介质与外界环境和所述制热循环系统之间进行循环热交换，进一步地，换热介质能够通过所述换热介质循环系统流入所述热泵机组中进行加热，加热后的换热介质再通过所述换热介质循环系统流出所述热泵机组，并且与外界环境进行之间进行热交换，然后再次流入所述热泵机组进行加热，从而实现循环热交换。Specifically, the heat pump unit is provided with a heating cycle system and a heat exchange medium cycle system, and the heating cycle system includes a compressor, an evaporating device, a condensing device and a throttling device. The heat exchange medium circulation system can use the heat exchange medium to conduct cyclic heat exchange between the external environment and the heating circulation system, and further, the heat exchange medium can flow into the heat pump unit through the heat exchange medium circulation system After heating, the heated heat exchange medium flows out of the heat pump unit through the heat exchange medium circulation system, and performs heat exchange with the external environment, and then flows into the heat pump unit again for heating, thereby realizing cyclic heat exchange .
另外，换热介质流入所述热泵机组的位置以及换热介质流出所述热泵机组的位置均设置有温度传感器，所述温度传感器能够实时测量换热介质流入所述热泵机组时的温度和换热介质流出所述热泵机组时的温度。并且，所述热泵机组还包括互感器，所述互感器能够采集所述压缩机的运行电流。In addition, temperature sensors are installed at the position where the heat exchange medium flows into the heat pump unit and the position where the heat exchange medium flows out of the heat pump unit, and the temperature sensor can measure the temperature and heat transfer rate of the heat exchange medium when it flows into the heat pump unit in real time. The temperature when the medium flows out of the heat pump unit. Moreover, the heat pump unit further includes a transformer, and the transformer can collect the operating current of the compressor.
以下将结合热泵机组运行本发明的控制方法的过程为例来对本发明的控制方法进行说明。首先参阅图1，该图是本发明的热泵机组的控制方法的主要步骤流程图。如图1所示，所述控制方法主要包括以下步骤：The control method of the present invention will be described below by taking the process of the heat pump unit running the control method of the present invention as an example. First refer to FIG. 1 , which is a flow chart of the main steps of the control method of the heat pump unit of the present invention. As shown in Figure 1, the control method mainly includes the following steps:
S1：检测所述热泵机组的运行参数；S1: detecting the operating parameters of the heat pump unit;
S2：根据运行参数，计算能效比；S2: Calculate the energy efficiency ratio according to the operating parameters;
S3：将所述能效比与第一阈值进行对比；S3: Comparing the energy efficiency ratio with a first threshold;
S4：根据对比结果选择性地调整运行程序。S4: Selectively adjust the running program according to the comparison result.
具体地，如图1所示，通过所述温度传感器和所述互感器实时检测所述热泵机组的运行参数，从而实现对所述热泵机组工作状态的实时监测。然后，根据检测到的运行参数，计算所述热泵机组的能效比，并且将所述能效比与第一阈值进行比较，以便实时检测所述热泵机组是否处于高效运行的状态。需要说明的是，所述第一阈值的选取与所述热泵机组工作的环境温度有关，所述第一阈值与所述环境温度对应的优选值可参照下表：Specifically, as shown in FIG. 1 , the operating parameters of the heat pump unit are detected in real time through the temperature sensor and the mutual inductor, so as to realize real-time monitoring of the working state of the heat pump unit. Then, according to the detected operating parameters, the energy efficiency ratio of the heat pump unit is calculated, and the energy efficiency ratio is compared with a first threshold, so as to detect in real time whether the heat pump unit is in a high-efficiency operation state. It should be noted that the selection of the first threshold is related to the working ambient temperature of the heat pump unit, and the preferred value corresponding to the first threshold and the ambient temperature can refer to the following table:
最后，根据所述能效比与所述第一阈值的对比结果，选择性地调整所述热泵机组的运行程序，使得所述热泵机组能够时刻保持高效的运行状态以及良好的制热效果。Finally, according to the comparison result between the energy efficiency ratio and the first threshold, the operation program of the heat pump unit is selectively adjusted, so that the heat pump unit can maintain an efficient operation state and a good heating effect at all times.
以下将参阅图2对本发明的优选实施方案进行具体说明，图2是本发明的热泵机组的控制方法的具体步骤流程图。如图2所示，所述控制方法具体包括如下步骤：The preferred embodiment of the present invention will be specifically described below with reference to FIG. 2 , which is a flow chart of specific steps of the control method of the heat pump unit of the present invention. As shown in Figure 2, the control method specifically includes the following steps:
S110：检测压缩机的运行电流、换热介质的第一温度和第二温度；S110: detecting the operating current of the compressor, the first temperature and the second temperature of the heat exchange medium;
S120：根据检测到的运行参数，计算热泵机组的能效比；S120: Calculate the energy efficiency ratio of the heat pump unit according to the detected operating parameters;
S130：判断所述能效比是否大于第一阈值；如果是，则执行步骤S140，如果不是，则执行步骤S150；S130: Determine whether the energy efficiency ratio is greater than the first threshold; if yes, execute step S140; if not, execute step S150;
S140：保持热泵机组的运行程序，正常加减载荷；S140: Maintain the operating procedure of the heat pump unit, and add and subtract loads normally;
S150：判断预设温度与第二温度之差是否大于第二阈值；如果是，则执行步骤S160，如果不是，则执行步骤S140；S150: Determine whether the difference between the preset temperature and the second temperature is greater than the second threshold; if yes, execute step S160; if not, execute step S140;
S160：启动热泵机组的辅助加热装置。S160: Start the auxiliary heating device of the heat pump unit.
具体地，在步骤S110中，通过所述互感器检测所述压缩机的运行电流I；通过所述温度传感器检测换热介质流入所述热泵机组时的第一温度T1和换热介质流出所述热泵机组时的第二温度T2。另外，需要说明的是，上述数据也可以通过其他方式检测获取，本发明不对上述数值的检测方式进行限制。Specifically, in step S110, the operating current I of the compressor is detected by the transformer; the first temperature T1 of the heat exchange medium flowing into the heat pump unit is detected by the temperature sensor; The second temperature T2 of the heat pump unit. In addition, it should be noted that the above-mentioned data can also be detected and obtained by other methods, and the present invention does not limit the detection methods of the above-mentioned values.
根据步骤S110中检测到的所述热泵机组的运行参数，在步骤S120中，计算所述热泵机组的能效比COP。需要说明的是，能效比是判断所述热泵机组是否处于高效运行状态最直接的参数。因此，通过实时计算所述能效比的方式来调整所述热泵机组的运行程序，能够使得所述热泵机组快速有效地实现高效制热。具体地，能效比COP的计算公式为：According to the operating parameters of the heat pump unit detected in step S110, in step S120, the energy efficiency ratio COP of the heat pump unit is calculated. It should be noted that the energy efficiency ratio is the most direct parameter for judging whether the heat pump unit is in an efficient operation state. Therefore, by adjusting the operation program of the heat pump unit by calculating the energy efficiency ratio in real time, the heat pump unit can quickly and effectively realize high-efficiency heating. Specifically, the formula for calculating the energy efficiency ratio COP is:
COP＝Q/PCOP=Q/P
其中，Q为所述热泵机组的制热量(单位：w)；P为所述热泵机组的实时功率(单位：w)。Wherein, Q is the heating capacity of the heat pump unit (unit: w); P is the real-time power of the heat pump unit (unit: w).
Q＝C*V*(T2－T1)Q＝C*V*(T2－T1)
其中，C为换热介质的比热容(单位：J/(kg·℃))；V为换热介质的流量(单位：kg/s)；T2为换热介质流出所述热泵机组时的温度(单位：℃)；T1为换热介质流入所述热泵机组时的温度(单位：℃)。本领域技术人员能够理解的是，对于每个热泵机组而言，换热介质的流量V都是一个固定值。具体地，流量V的取值与所述热泵机组本身有关，故流量V需要结合所述热泵机组的实际情况进行取值。Among them, C is the specific heat capacity of the heat exchange medium (unit: J/(kg ° C)); V is the flow rate of the heat exchange medium (unit: kg/s); T2 is the temperature when the heat exchange medium flows out of the heat pump unit ( Unit: °C); T1 is the temperature (unit: °C) when the heat exchange medium flows into the heat pump unit. Those skilled in the art can understand that, for each heat pump unit, the flow rate V of the heat exchange medium is a fixed value. Specifically, the value of the flow V is related to the heat pump unit itself, so the value of the flow V needs to be determined in combination with the actual situation of the heat pump unit.
P＝1.732*U*I*COSφP＝1.732*U*I*COSφ
其中，U为所述热泵机组的工作电压，可以取380V或0.38KV；I为所述压缩机的运行电流(单位：A)；COSφ为功率因子，可以取0.85，也可以根据实际情况自行选取其他值。Among them, U is the operating voltage of the heat pump unit, which can be 380V or 0.38KV; I is the operating current of the compressor (unit: A); COSφ is the power factor, which can be 0.85, or can be selected according to the actual situation other values.
根据上述方法可以计算出所述热泵机组的能效比，在步骤S130中，将计算出的所述能效比与所述第一阈值进行对比。如果所述能效比大于所述第一阈值，则表示所述热泵机组处于高效运行的状态。此时，无需开启所述热泵机组的辅助加热装置，保持所述热泵机组的设定运行程序不变，正常加减载荷即可快速达到预设温度，以便节约能源。如果所述能效比小于或等于所述第一阈值，则需要对所述热泵机组的工作状态进行进一步的判断，以便保证判断结果的准确性。此时，接着执行步骤S150。The energy efficiency ratio of the heat pump unit can be calculated according to the above method, and in step S130, the calculated energy efficiency ratio is compared with the first threshold. If the energy efficiency ratio is greater than the first threshold, it means that the heat pump unit is in a high-efficiency operation state. At this time, there is no need to turn on the auxiliary heating device of the heat pump unit, and the set operation program of the heat pump unit remains unchanged, and the preset temperature can be quickly reached by normal load addition and subtraction, so as to save energy. If the energy efficiency ratio is less than or equal to the first threshold, it is necessary to further judge the working state of the heat pump unit, so as to ensure the accuracy of the judgment result. At this point, step S150 is then performed.
具体地，在步骤S150中，先计算所述预设温度T0与所述第二温度T2的差值，并且将所述差值与所述第二阈值进行对比，以便进一步判断所述热泵机组是否处于高效运行的状态。需要说明的是，所述第二阈值的选取也与所述热泵机组工作的环境温度有关，所述第二阈值与所述环境温度对应的优选值可参照下表：Specifically, in step S150, first calculate the difference between the preset temperature T0 and the second temperature T2, and compare the difference with the second threshold, so as to further determine whether the heat pump unit in a state of efficient operation. It should be noted that the selection of the second threshold is also related to the working ambient temperature of the heat pump unit, and the preferred value corresponding to the second threshold and the ambient temperature can refer to the following table:
进一步地，在步骤S150中，如果所述差值小于或等于所述第二阈值，则表示所述热泵机组是处于高效运行的状态。此时，无需开启所述热泵机组的辅助加热装置，保持所述热泵机组的设定运行程序不变，正常加减载荷即可使得换热介质的温度迅速达到预设温度，以便节约能源，即执行步骤S140。Further, in step S150, if the difference is less than or equal to the second threshold, it means that the heat pump unit is in a state of high-efficiency operation. At this time, there is no need to turn on the auxiliary heating device of the heat pump unit, keep the set operation program of the heat pump unit unchanged, and the temperature of the heat exchange medium can quickly reach the preset temperature by normal load addition and subtraction, so as to save energy, that is Execute step S140.
在步骤S150中，如果所述差值大于所述第二阈值，则表示所述热泵机组处于低效运行的状态，此时，所述热泵机组的制热效果较低，而且能效比也较低，产生单位制热量所消耗的电量较大。因此，所述热泵机组需要启动所述辅助加热装置，用于迅速提高所述热泵机组的制热效果，以便所述热泵机组的换热介质的温度能够迅速达到所述预设温度。及时开启所述辅助加热装置，不仅能够快速提高换热介质的温度以便外界环境的快速升温，而且还可以提高所述热泵机组的工作效率，以便达到更好的节能效果。本领域技术人员能够理解的是，所述辅助加热装置优选为电加热器。In step S150, if the difference is greater than the second threshold, it means that the heat pump unit is in a low-efficiency operation state. At this time, the heating effect of the heat pump unit is low, and the energy efficiency ratio is also low. , the power consumed to generate unit heating capacity is relatively large. Therefore, the heat pump unit needs to start the auxiliary heating device for rapidly improving the heating effect of the heat pump unit, so that the temperature of the heat exchange medium of the heat pump unit can quickly reach the preset temperature. Turning on the auxiliary heating device in time can not only rapidly increase the temperature of the heat exchange medium to rapidly increase the temperature of the external environment, but also improve the working efficiency of the heat pump unit so as to achieve a better energy saving effect. Those skilled in the art can understand that the auxiliary heating device is preferably an electric heater.
本发明还包括一种热泵系统，所述热泵系统包括所述热泵机组和用于控制所述热泵机组的控制器，并且所述控制器能够执行上述优选技术方案中的热泵机组的控制方法。The present invention also includes a heat pump system, the heat pump system includes the heat pump unit and a controller for controlling the heat pump unit, and the controller can execute the control method of the heat pump unit in the above preferred technical solution.
最后需要说明的是，上述实施例仅是本发明的优选实施方案，并不作为对本发明保护范围的限制。本领域技术人员在实际使用本发明的控制方法时，可以根据需要适当添加或删减一部分步骤，或者调换不同步骤之间的顺序。这种改变并没有超出本发明的基本原理，属于本发明的保护范围。Finally, it should be noted that the above examples are only preferred implementations of the present invention, and are not intended to limit the protection scope of the present invention. When actually using the control method of the present invention, those skilled in the art may appropriately add or delete some steps as required, or exchange the order of different steps. This change does not go beyond the basic principles of the present invention and belongs to the protection scope of the present invention.
至此，已经结合附图描述了本发明的优选实施方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。So far, the preferred embodiments of the present invention have been described with reference to the accompanying drawings, but those skilled in the art will easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.
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