WO2011015133A1 - Frost detection device, heat pump air conditioner and defrost control method thereof - Google Patents

Frost detection device, heat pump air conditioner and defrost control method thereof Download PDF

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Publication number
WO2011015133A1
WO2011015133A1 PCT/CN2010/075676 CN2010075676W WO2011015133A1 WO 2011015133 A1 WO2011015133 A1 WO 2011015133A1 CN 2010075676 W CN2010075676 W CN 2010075676W WO 2011015133 A1 WO2011015133 A1 WO 2011015133A1
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WO
WIPO (PCT)
Prior art keywords
air conditioner
frost
defrosting
heat pump
detecting device
Prior art date
Application number
PCT/CN2010/075676
Other languages
French (fr)
Chinese (zh)
Inventor
张辉
叶务占
黄昌铎
陈志强
Original Assignee
珠海格力电器股份有限公司
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Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Publication of WO2011015133A1 publication Critical patent/WO2011015133A1/en

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Classifications

    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/02—Detecting the presence of frost or condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/11—Sensor to detect if defrost is necessary
    • F25B2700/111—Sensor to detect if defrost is necessary using an emitter and receiver, e.g. sensing by emitting light or other radiation and receiving reflection by a sensor

Definitions

  • the invention belongs to the technical field of refrigeration, and in particular relates to a water frost detecting device, a heat pump type air conditioner and a defrosting control method thereof.
  • the present invention relates to a defrosting method of a heat pump type air conditioner, which has a method capable of detecting frosting on an outdoor heat exchanger, and capable of starting a defrosting operation in a heating operation mode. Background technique
  • the defrosting control of the prior art air conditioners is indirectly defrosting by detecting the frosting condition by sensors such as temperature, pressure, wind speed, and rotational speed.
  • sensors such as temperature, pressure, wind speed, and rotational speed.
  • a temperature sensor on an outdoor heat exchanger is used to judge frosting on the outdoor heat exchanger, and a temperature sensor provided on the outdoor heat exchanger starts a defrosting operation, and
  • the defrosting time is also automatically determined by detecting the outdoor pipe temperature or by detecting the end of the predetermined time.
  • the phenomenon of defrosting is often caused, that is, in fact, there is no frost formation on the outdoor heat exchanger or the defrosting is continued after the frost is removed.
  • many companies have proposed some defrosting modes, but they have not solved this problem very well.
  • the invention patent application CN1164006A published in the Chinese Patent Gazette, published on November 5, 1997, the applicant is South Korea. LG Electronics Co., Ltd., the patent application discloses a defrosting method of a heat pump type air conditioner, comprising: for measuring between an indoor duct temperature TE 1 and a chamber temperature TR 1 after a self-heating operation start time e1 minute a first temperature measuring step of the temperature difference TD 1 for measuring a second temperature measuring step of the temperature difference TD 2 between the indoor duct temperature TE 2 and the chamber temperature TR 2 after m 2 minutes, and for The respective temperatures measured in the first and second temperature measuring steps are compared with a reference value and a frosting step of detecting frosting.
  • the invention patent application initiates a defrosting operation by means of an indoor pipe temperature sensor and an indoor temperature sensor in a heating mode of operation, the defrosting time being between two sets of indoor pipe temperatures and room temperatures measured at two different times. After the difference is made separately, the difference is again, and then compared with a set value to determine the defrost time.
  • the invention sets different defrost time periods by setting different comparison values, thus changing the tradition.
  • the time-critical problem in the defrosting method improves the accuracy of the defrosting, but still does not solve the problem of automatic deployment of the defrosting time of the heat pump type air conditioner with the frosting on the outdoor heat exchanger. Summary of the invention
  • An object of the present invention is to provide a water frost detecting device, a heat pump type air conditioner and a defrosting control method thereof, which can further improve the accuracy of the judgment of frosting, can enter and exit the defrosting operation in time, and improve the heat efficiency of the heat pump.
  • the water frost detecting device includes a light emitting device and a light receiving device, and the base body serves as a supporting member, and the base body is provided with a light emitting device mounting portion, a light receiving device mounting portion, and a printed circuit board mounting portion, the light emitting device mounting portion, The light receiving device mounting portion and the printed circuit board mounting portion are semi-closed cavities; the light emitting device and the light receiving device are fixed in the corresponding cavity on the base through the printed wiring board (63); the electrical signal passes through the wire connected to the printed circuit board transmission.
  • the heat pump type air conditioner includes a control unit, an outdoor heat exchanger, an outdoor fan, a compressor, a four-way wide, an indoor heat exchanger, an indoor fan, and a throttle device; the outdoor heat exchanger, the compressor, and the four-way wide
  • the throttling device and the indoor heat exchanger are connected by a refrigerant pipe to form a closed circulation system, and the refrigerant circulates in the circulation system; wherein the heat pump type air conditioner further comprises a water frost detection installed on the circulation system
  • the device, the water frost detecting device is electrically connected to the control unit, and converts the detected optical signal into an electrical signal for transmission to the control unit.
  • the defrosting control method of the heat pump type air conditioner wherein after the air conditioner is operated for tl minutes, the water frost detecting device detects the circulatory system; when the water frost detecting device detects that the circulatory system has frost, the air conditioner turns to Defrost operation mode; After the air conditioner defrosting operation for 13 minutes, the water frost detecting device detects the circulation system; when the water frost detecting device detects that the circulation system has no frost, the air conditioner switches to the heating operation mode.
  • the single-chip microcomputer of the control unit further analyzes the change in the temperature of the pipeline, confirms the frost, and the air conditioner turns into the defrosting Operating mode.
  • the defrosting control method of the heat pump type air conditioner wherein, when the water frost detecting device detects that the circulation system is frost-free, the single-chip microcomputer of the control unit further analyzes the change of the pipeline temperature, confirming that the frost has been completed, and the air conditioner is turned into Heating mode.
  • the heat pump type air conditioner of the present invention includes a water frost detecting device mounted on the circulation system, the water frost detecting device including a light emitting device and a light receiving device, wherein the water frost detecting device is electrically connected to the control unit, and The detected optical signal is converted into an electrical signal for transmission to the control unit.
  • the working principle of the water frost detecting device is: Water frost is used as an obstacle to the beam path, and the output signal of the light receiving device is changed by blocking and refracting the light beam and changing the intensity of the light.
  • the device can be applied to the defrosting control of the refrigeration appliance, the water volume control, and the like. Applicable fashion is where you need to detect water frost.
  • the circulation system is detected using the water frost detecting device, and the conditions for the heat pump type air conditioner to enter and exit the defrosting mode are effectively set. It can accurately judge whether the frost is formed or not, and effectively defrost, which improves the heat efficiency of the heat pump of the air conditioner.
  • the defrosting time of the heat pump type air conditioner is automatically adjusted according to the frosting on the outdoor heat exchanger to prevent the occurrence of false defrosting.
  • FIG. 1 is a schematic diagram of a control method of a defrosting control method of a heat pump type air conditioner of the present invention
  • FIG. 1 is a schematic diagram showing the second control mode of the defrosting control method of the heat pump type air conditioner of the present invention
  • FIG. 3 is a flow chart showing a control method of a defrosting control method of the heat pump type air conditioner of the present invention
  • Figure 5 is a schematic view showing the principle of a circulation system of the heat pump type air conditioner of the present invention.
  • Figure 6 is a schematic view showing the principle of the second embodiment of the heat pump type air conditioner of the present invention.
  • Figure 7 is a schematic exploded view of the structure of the water frost detecting device of the present invention.
  • Figure 8 is a schematic view showing the installation structure of the water frost detecting device of the present invention.
  • Figure 9 is a schematic view showing the working principle of the water frost detecting device of the present invention.
  • Figure 10 is a schematic view showing the structure of a seat body of the water frost detecting device of the present invention.
  • Figure 11 is a schematic view showing the structure of a printed circuit board mounting portion of the base of the water frost detecting device of the present invention.
  • Figure 12 is a schematic view showing the internal structure of the water frost detecting device of the present invention.
  • Figure 13 is a schematic cross-sectional structural view of the water frost detecting device of the present invention.
  • Figure 14 is a perspective view showing the structure of the water frost detecting device of the present invention. Description of the reference signs:
  • the invention discloses a heat pump type air conditioner, as shown in Figures 5, 6, and 7, including a control component, an outdoor heat exchanger 3, an outdoor fan, a compressor 1, a four-way wide 2, an indoor heat exchanger 5, an indoor fan, and The throttling device 4; the outdoor heat exchanger 3, the compressor 1, the four-way wide 2, the throttling device 4, and the indoor heat exchanger 5 are connected by a refrigerant pipe to form a closed circulation system in which the refrigerant is
  • the heat pump type air conditioner further includes a water frost detecting device 6 mounted on the circulation system, and the water frost detecting device 6 includes a light emitting device 61 and a light receiving device 62, and the water frost detecting device 6 Connected to the control unit circuit and convert the detected optical signal into an electrical signal for transmission to the control unit.
  • the water frost detecting device 6 is provided with a seat member 65 as a supporting member, and the seat body 65 is provided with a light emitting device mounting portion 651 and a light receiving device mounting portion 652.
  • the printed wiring board mounting portion 653, the light emitting device mounting portion 651, the light receiving device mounting portion 652, and the printed wiring board mounting portion 653 are semi-closed cavities; the light emitting device 61 and the light receiving device 62 are fixed to the seat by the printed wiring board 63.
  • the corresponding cavity in the body 65; the electrical signal is transmitted through the wire 64 connected to the printed wiring board 63.
  • One side of the light receiving device 62 facing the light emitting device 61 is a light receiving surface, and the wall surface of the seat body 65 near the light receiving surface is provided with a light transmitting hole 621; the water frost detecting device 6 further includes a dustproof protection
  • the mesh cover 66 and the fixing clip 67 are located outside the seat body 65 and are fastened between the light emitting device mounting portion 651 and the light receiving device mounting portion 652; the fixing clip 67 is rotated 90.
  • the "U" shape is clamped to the recessed portion below the light emitting device mounting portion 651 and the light receiving device mounting portion 652.
  • the base 65 may also be made of a transparent material.
  • a light-shielding member 10 is disposed on a side of the light-receiving device 62 facing the light-emitting device 61, and a light-transmitting hole 621 is formed in the light-shielding member.
  • the mesh cover 66 has a cover shape and is provided with a plurality of mesh holes on the front surface of the base body 65.
  • a mounting space for a frosting body is provided between the light-emitting device 61 and the light-receiving device 62, and the base 65 is provided with a mounting surface 654 of the frosting body 8.
  • Another way of the water frost detecting device 6 is to use a photoelectric switch D301F31A, which is U-shaped.
  • the working principle of the water frost detecting device 6 is as follows: As shown in Figs. 8 and 9, the water frost 81 is used as an obstacle of the light beam passage, and the output signal of the light receiving device is changed by blocking and refracting the light beam and changing the intensity of the light.
  • the device can be applied to defrosting control of refrigeration appliances, water volume control, and the like. Applicable fashion is where you need to detect water frost.
  • the water frost detecting device is mounted on the outdoor heat exchanger or the throttle device 4 and the piping
  • the location of the pipeline is easy to frost, the mounting surface is close to the surface of the heat exchanger and the pipeline; and the temperature sensor 7 is also provided on the pipeline of the refrigeration system.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the water frost detecting device 6 uses the device to automatically defrost the air conditioner, and installs it on the pipe of the outlet of the cooling system throttle, and the mounting surface is in close contact with the pipe surface.
  • the air conditioner is controlled by the controller to enter the defrosting operation state. After entering the defrosting operation, when the water frost between the light emitting device and the light receiving device is melted and the corresponding signal is output, the defrosting operation is ended.
  • Embodiment 2 As shown in Fig. 6, the water frost detecting device 6 uses the device to automatically defrost the air conditioner, and installs it on the pipeline of the outdoor heat exchanger 3, and the mounting surface is in close contact with the pipe surface.
  • the air conditioner is controlled by the controller to enter the defrosting operation state. After entering the defrosting operation, when the water frost between the light emitting device and the light receiving device is melted and the corresponding signal is output, the defrosting operation is ended.
  • the defrosting control method of the heat pump type air conditioner according to the first embodiment or the second embodiment is as shown in FIG. 1 and FIG. 3, wherein after the air conditioner is operated for 11 minutes, the water frost detecting device detects the circulation system; When the frost detecting device detects that the circulation system has frost, the air conditioner switches to the defrost operation mode; after the air conditioner defrosts for 13 minutes, the water frost detecting device detects the circulation system; when the water frost detecting device detects that the circulation system is frost-free When the air conditioner is switched to the heating operation mode.
  • the defrosting control method of the heat pump type air conditioner specifically includes:
  • Step 1 The defrost control mode starts
  • Step 3 The water frost detecting device detects whether the defrosting has been completed, and if yes, proceeds to step 5, if no, proceeds to step 4;
  • Step 4 Exit the defrost control mode, go to step one;
  • Step 5 The control component judges whether the delay time has elapsed in 2 minutes, and if yes, proceeds to step six, if no, proceeds to step four;
  • Step 6 The four-way wide opening of the heat pump type air conditioner, the outdoor fan start, the indoor fan starts normally, and proceeds to step VII;
  • Step 7 The defrosting mark is cleared, and the process proceeds to step fourteen;
  • Step 8 The control component determines whether the minimum running time of the compressor is satisfied, and if yes, proceeds to step 10, if no, proceeds to step IX;
  • Step 9 Exit the defrost control mode, go to step one;
  • Step 10 The control component determines whether the accumulated running time is satisfied, and if yes, proceeds to step XI, if no, proceeds to step IX;
  • Step 11 The water frost detecting device detects whether there is frost, if yes, proceeds to step 12, if no, proceeds to step IX;
  • Step 12 The four-way wide stop of the heat pump type air conditioner stops, the outdoor fan stops, the indoor fan stops, enters the heat pump defrosting process, and proceeds to step 13;
  • Step 14 Exit the defrost control mode and go to step 1.
  • Control method 1 The signal is processed and controlled by the single-chip microcomputer. After the heat pump is running for a certain period of time, the water frost detecting device detects the frosting for a certain time and outputs the corresponding signal, and the air conditioner enters the defrosting operation. After entering the defrost operation, when the water frost detecting device detects no frost and outputs a corresponding signal, the defrost operation ends after a certain time delay.
  • the defrosting control method of the above heat pump type air conditioner is as shown in Figs. 2 and 4, wherein when the water frost detecting device detects that the circulation system has frost, the single-chip microcomputer of the control unit further analyzes the change of the pipeline temperature to confirm that there is frost, The air conditioner is switched to the defrost mode.
  • the defrosting control method of the above heat pump type air conditioner is as shown in Figs. 2 and 4, wherein when the water frost detecting device detects that the circulation system is frost-free, the single-chip microcomputer of the control unit further analyzes the change of the pipeline temperature to confirm that the frost has been turned on. After that, the air conditioner is switched to the heating mode.
  • the line temperature refers to the temperature of any part of the circulation system, especially the temperature of the evaporator.
  • Control mode 2 The signal is processed and controlled by the single-chip microcomputer. After the heat pump is running for a certain period of time, the water frost detecting device detects the frosting and outputs the corresponding signal for a certain period of time, and the temperature sensor detects that the pipeline temperature is lower than continuous for a certain period of time. When the value is set, the air conditioner enters the defrost operation. After entering the defrost operation, when the water frost detecting device detects no frost and outputs a corresponding signal, it delays for a certain time, and the temperature sensor detects that the pipe temperature is higher than the set value for a certain period of time, and then ends the defrost operation.
  • control mode one and control mode two An example of the control method 1.
  • the water frost detecting device is placed on the outlet pipe of the throttle device, and the mounting surface is in close contact with the pipe surface.
  • the temperature sensor is placed in the line of the indoor heat exchanger.
  • the air conditioner enters the defrosting operation. After entering the defrost operation, when the water frost detecting device detects the frost-free state and outputs the corresponding signal, the defrost operation ends at the delay t 3min.
  • Example of control method 1 The water frost detecting device is placed on the piping pipe to easily form a water frost, and the mounting surface is in close contact with the pipe surface.
  • the temperature sensor is placed in the line of the indoor heat exchanger.
  • the air conditioner enters the defrosting operation. After entering the defrost operation, when the water frost detecting device detects the frost-free state and outputs the corresponding signal, the defrost operation ends at the delay t 3min.
  • the water frost detecting device is placed on the pipeline of the outdoor heat exchanger, and the mounting surface is in close contact with the surface of the pipe.
  • the air conditioner enters the defrosting operation.
  • the defrosting operation After entering the defrosting operation, when the water frost detecting device detects the frost-free state and outputs a corresponding signal, the defrosting operation is ended.
  • An example of the control method 4 The water frost detecting device is placed on the pipeline of the outdoor heat exchanger, and the mounting surface is in close contact with the surface of the pipe.
  • the air conditioner When the water frost detecting device continuously outputs the frosting signal at t lmin, the air conditioner enters the defrosting operation. After entering the defrosting operation, when the water frost detecting device detects the frost-free state and outputs a corresponding signal, the defrosting operation is ended.
  • Two control methods 1.
  • the water frost detection device is placed on the outlet pipe of the throttle device, and the mounting surface is in close contact with the pipe surface.
  • the temperature sensor is placed in the line of the indoor heat exchanger.
  • the defrosting operation After entering the defrosting operation, when the water frost detecting device detects the frost-free state and outputs a corresponding signal, and the temperature sensor detects that the cooling system pipeline temperature is higher than T2 continuously for t 3 min, the defrosting operation is ended.
  • Time t, temperature T is determined by the refrigeration system of the specific model.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

A frost detection device comprises a light-emitting device(61) and a light-receiving device(62), wherein the output signal from the light-receiving device(62) changes when the light emitted is blocked by the frost. And a heat pump air conditioner comprising the frost detection device and a defrost control method thereof are provided.

Description

水霜检测装置、 热泵型空调器及其除霜控制方法 技术领域  Water frost detecting device, heat pump type air conditioner and defrosting control method thereof
本发明属于制冷技术领域， 尤其涉及一种水霜检测装置、 热泵型空调器及其除霜 控制方法。 本发明涉及热泵型空调器的除霜方法， 具有能够检测室外热交换器上结霜 情况， 和能够以加热工作模式， 启动除霜操作的方法。 背景技术  The invention belongs to the technical field of refrigeration, and in particular relates to a water frost detecting device, a heat pump type air conditioner and a defrosting control method thereof. The present invention relates to a defrosting method of a heat pump type air conditioner, which has a method capable of detecting frosting on an outdoor heat exchanger, and capable of starting a defrosting operation in a heating operation mode. Background technique
现有技术空调器的除霜控制都是间接釆用温度、 压力、 风速、 转速等传感器检测 结霜情况进行除霜控制。 在实施过程中， 由于***和环境等因素的影响， 实际与理论 相差较大， 或是除霜不完全， 或是提前除霜， 这都降低热泵制热效率。  The defrosting control of the prior art air conditioners is indirectly defrosting by detecting the frosting condition by sensors such as temperature, pressure, wind speed, and rotational speed. In the implementation process, due to the influence of factors such as system and environment, the actual and theoretical differences are large, or the defrosting is not complete, or the defrosting is advanced, which reduces the heat pump heating efficiency.
例如， 在传统的热泵型空调器中， 釆用室外热交换器上的温度传感器来判断室外 热交换器上的结霜情况， 用设置在室外热交换器上温度传感器启动除霜操作， 同时， 除霜时间也是通过检测室外管道温度或通过检测预定时间结束来自动确定。 在这种除 霜方法中， 经常会出现误除霜的现象， 即实际上室外热交换器上并没有霜形成或者有 霜除尽后还继续除霜。 为了解决上述问题， 很多公司都提出了一些除霜模式， 但是都 没有很好的解决这个问题， 如中国专利公报上公开的发明专利申请 CN1164006A, 公开 日 1997年 11月 5 日， 申请人是韩国 LG电子株式会社， 该专利申请公开了一种热泵型 空调器的除霜方法， 包括： 用于测量室内管道温度 T E 1与自加热操作启动时刻经过 m 1分钟后的室温度 T R 1之间的温度差值 T D 1的第一温度测量步骤， 用于测量室 内管道温度 T E 2与经过 m 2分钟后的室温度 T R 2之间的温度差值 T D 2的第二温 度测量步骤， 和用于把第一和第二温度测量步骤中测量的各个温度与参考值比较和检 测结霜的除霜步骤。 该发明专利申请通过在加热操作模式下， 依靠室内管道温度传感 器和室内温度传感器来启动除霜操作， 除霜时间是通过在两个不同的时间测量得到的 两组室内管道温度和室内温度之间分别进行差值之后， 再次差值， 然后与某一设定值 比较，来确定除霜时间该发明通过设定不同的比较值就会得到不同的设定除霜时间段， 这样就改变了传统除霜方法中的时间一定的问题， 使除霜的精确度有所提高， 但仍然 没有解决热泵型空调器除霜时间随着室外热交换器上的结霜情况， 自动的调配的问题。 发明内容 For example, in a conventional heat pump type air conditioner, a temperature sensor on an outdoor heat exchanger is used to judge frosting on the outdoor heat exchanger, and a temperature sensor provided on the outdoor heat exchanger starts a defrosting operation, and The defrosting time is also automatically determined by detecting the outdoor pipe temperature or by detecting the end of the predetermined time. In this defrosting method, the phenomenon of defrosting is often caused, that is, in fact, there is no frost formation on the outdoor heat exchanger or the defrosting is continued after the frost is removed. In order to solve the above problems, many companies have proposed some defrosting modes, but they have not solved this problem very well. For example, the invention patent application CN1164006A published in the Chinese Patent Gazette, published on November 5, 1997, the applicant is South Korea. LG Electronics Co., Ltd., the patent application discloses a defrosting method of a heat pump type air conditioner, comprising: for measuring between an indoor duct temperature TE 1 and a chamber temperature TR 1 after a self-heating operation start time e1 minute a first temperature measuring step of the temperature difference TD 1 for measuring a second temperature measuring step of the temperature difference TD 2 between the indoor duct temperature TE 2 and the chamber temperature TR 2 after m 2 minutes, and for The respective temperatures measured in the first and second temperature measuring steps are compared with a reference value and a frosting step of detecting frosting. The invention patent application initiates a defrosting operation by means of an indoor pipe temperature sensor and an indoor temperature sensor in a heating mode of operation, the defrosting time being between two sets of indoor pipe temperatures and room temperatures measured at two different times. After the difference is made separately, the difference is again, and then compared with a set value to determine the defrost time. The invention sets different defrost time periods by setting different comparison values, thus changing the tradition. The time-critical problem in the defrosting method improves the accuracy of the defrosting, but still does not solve the problem of automatic deployment of the defrosting time of the heat pump type air conditioner with the frosting on the outdoor heat exchanger. Summary of the invention
本发明的目的在于提供一种水霜检测装置、 热泵型空调器及其除霜控制方法， 可 进一步提高对结霜的判断的准确性， 能够及时进入和退出除霜运行， 提高热泵制热效 率。  SUMMARY OF THE INVENTION An object of the present invention is to provide a water frost detecting device, a heat pump type air conditioner and a defrosting control method thereof, which can further improve the accuracy of the judgment of frosting, can enter and exit the defrosting operation in time, and improve the heat efficiency of the heat pump.
本发明是通过以下技术方案来实现的：  The present invention is achieved by the following technical solutions:
水霜检测装置， 包括有发光器件和光接收器件， 由座体作为支撑部件， 所述座体 设置有发光器件安装部、 光接收器件安装部和印刷线路板安装部， 所述发光器件安装 部、 光接收器件安装部和印刷线路板安装部为半封闭的腔体； 发光器件和光接收器件 通过印刷线路板（63 ) 固定在座体上相应的腔体中； 电信号通过与印刷线路板连接的 导线传输。  The water frost detecting device includes a light emitting device and a light receiving device, and the base body serves as a supporting member, and the base body is provided with a light emitting device mounting portion, a light receiving device mounting portion, and a printed circuit board mounting portion, the light emitting device mounting portion, The light receiving device mounting portion and the printed circuit board mounting portion are semi-closed cavities; the light emitting device and the light receiving device are fixed in the corresponding cavity on the base through the printed wiring board (63); the electrical signal passes through the wire connected to the printed circuit board transmission.
热泵型空调器， 包括有控制部件、 室外换热器、 室外风机、 压缩机、 四通阔、 室 内换热器、 室内风机以及节流装置； 所述室外换热器、 压缩机、 四通阔、 节流装置、 以及室内换热器通过冷媒管道连接形成封闭的循环***， 冷媒在所述循环***内循环 流动； 其中， 所述热泵型空调器还包括有安装在循环***上的水霜检测装置， 所述水 霜检测装置与控制部件电路连接，并将检测到的光信号转换为电信号传输到控制部件。  The heat pump type air conditioner includes a control unit, an outdoor heat exchanger, an outdoor fan, a compressor, a four-way wide, an indoor heat exchanger, an indoor fan, and a throttle device; the outdoor heat exchanger, the compressor, and the four-way wide The throttling device and the indoor heat exchanger are connected by a refrigerant pipe to form a closed circulation system, and the refrigerant circulates in the circulation system; wherein the heat pump type air conditioner further comprises a water frost detection installed on the circulation system The device, the water frost detecting device is electrically connected to the control unit, and converts the detected optical signal into an electrical signal for transmission to the control unit.
上述热泵型空调器的除霜控制方法， 其中， 空调器制热运行 t l分钟后， 水霜检测 装置即对循环***进行检测； 当水霜检测装置检测到循环***有霜时， 空调器转为除 霜运行模式； 空调器除霜运行 13分钟后， 水霜检测装置对循环***进行检测； 当水霜 检测装置检测到循环***无霜时， 空调器转为制热运行模式。  The defrosting control method of the heat pump type air conditioner, wherein after the air conditioner is operated for tl minutes, the water frost detecting device detects the circulatory system; when the water frost detecting device detects that the circulatory system has frost, the air conditioner turns to Defrost operation mode; After the air conditioner defrosting operation for 13 minutes, the water frost detecting device detects the circulation system; when the water frost detecting device detects that the circulation system has no frost, the air conditioner switches to the heating operation mode.
上述热泵型空调器的除霜控制方法， 其中， 当水霜检测装置检测到循环***有霜 时， 控制部件的单片机通过对管路温度的变化进一步分析， 确认有霜， 空调器转为除 霜运行模式。  In the above defrosting control method of the heat pump type air conditioner, wherein when the water frost detecting device detects that the circulation system has frost, the single-chip microcomputer of the control unit further analyzes the change in the temperature of the pipeline, confirms the frost, and the air conditioner turns into the defrosting Operating mode.
上述热泵型空调器的除霜控制方法， 其中， 当水霜检测装置检测到循环***无霜 时， 控制部件的单片机通过对管路温度的变化进一步分析， 确认霜已经化完， 空调器 转为制热运行模式。 本发明的有益效果如下：  The defrosting control method of the heat pump type air conditioner, wherein, when the water frost detecting device detects that the circulation system is frost-free, the single-chip microcomputer of the control unit further analyzes the change of the pipeline temperature, confirming that the frost has been completed, and the air conditioner is turned into Heating mode. The beneficial effects of the present invention are as follows:
本发明的热泵型空调器， 由于包括有安装在循环***上的水霜检测装置， 所述水 霜检测装置包括有发光器件和光接收器件， 所述水霜检测装置与控制部件电路连接， 并将检测到的光信号转换为电信号传输到控制部件。 水霜检测装置的工作原理是： 利 用水霜作为光束通道的障碍物， 通过对光束的遮挡、 折射， 改变光的强度， 使光接收 器件输出信号发生变化。该装置可应用在制冷器具的除霜控制、水霜容积控制等方面。 应用时装在需要检测水霜的位置。 通过水霜检测装置检测， 或通过管路温度传感器和 水霜检测装置双重检测。 本发明的热泵型空调器的除霜控制方法， 使用水霜检测装置 对循环***进行检测， 有效的设定热泵型空调器进入和退出除霜模式的条件。 能准确 判断结霜与否， 进行有效除霜， 提高了空调器热泵制热效率。 同时， 使热泵型空调器 除霜时间随着室外热交换器上的结霜情况， 自动的调配， 防止误除霜现象的发生。 附图说明 The heat pump type air conditioner of the present invention includes a water frost detecting device mounted on the circulation system, the water frost detecting device including a light emitting device and a light receiving device, wherein the water frost detecting device is electrically connected to the control unit, and The detected optical signal is converted into an electrical signal for transmission to the control unit. The working principle of the water frost detecting device is: Water frost is used as an obstacle to the beam path, and the output signal of the light receiving device is changed by blocking and refracting the light beam and changing the intensity of the light. The device can be applied to the defrosting control of the refrigeration appliance, the water volume control, and the like. Applicable fashion is where you need to detect water frost. It is detected by the water frost detecting device or by the pipeline temperature sensor and the water frost detecting device. In the defrosting control method of the heat pump type air conditioner of the present invention, the circulation system is detected using the water frost detecting device, and the conditions for the heat pump type air conditioner to enter and exit the defrosting mode are effectively set. It can accurately judge whether the frost is formed or not, and effectively defrost, which improves the heat efficiency of the heat pump of the air conditioner. At the same time, the defrosting time of the heat pump type air conditioner is automatically adjusted according to the frosting on the outdoor heat exchanger to prevent the occurrence of false defrosting. DRAWINGS
图 1是本发明热泵型空调器的除霜控制方法控制方式一原理图；  1 is a schematic diagram of a control method of a defrosting control method of a heat pump type air conditioner of the present invention;
图 1是本发明热泵型空调器的除霜控制方法控制方式二原理图；  1 is a schematic diagram showing the second control mode of the defrosting control method of the heat pump type air conditioner of the present invention;
图 3是本发明热泵型空调器的除霜控制方法控制方式一流程图；  3 is a flow chart showing a control method of a defrosting control method of the heat pump type air conditioner of the present invention;
图 4是本发明热泵型空调器的除霜控制方法控制方式二流程图；  4 is a flow chart of a second control mode of the defrosting control method of the heat pump type air conditioner of the present invention;
图 5是本发明热泵型空调器的实施例一循环***原理示意图；  Figure 5 is a schematic view showing the principle of a circulation system of the heat pump type air conditioner of the present invention;
图 6是本发明热泵型空调器的实施例二循环***原理示意图；  Figure 6 is a schematic view showing the principle of the second embodiment of the heat pump type air conditioner of the present invention;
图 7是本发明水霜检测装置结构***示意图；  Figure 7 is a schematic exploded view of the structure of the water frost detecting device of the present invention;
图 8是本发明水霜检测装置安装结构示意图；  Figure 8 is a schematic view showing the installation structure of the water frost detecting device of the present invention;
图 9是本发明水霜检测装置工作原理示意图；  Figure 9 is a schematic view showing the working principle of the water frost detecting device of the present invention;
图 10是本发明水霜检测装置的座体结构示意图；  Figure 10 is a schematic view showing the structure of a seat body of the water frost detecting device of the present invention;
图 11是本发明水霜检测装置的座体的印刷线路板安装部结构示意图；  Figure 11 is a schematic view showing the structure of a printed circuit board mounting portion of the base of the water frost detecting device of the present invention;
图 12是本发明水霜检测装置内部结构示意图；  Figure 12 is a schematic view showing the internal structure of the water frost detecting device of the present invention;
图 1 3是本发明水霜检测装置剖视结构示意图；  Figure 13 is a schematic cross-sectional structural view of the water frost detecting device of the present invention;
图 14是本发明水霜检测装置立体结构示意图。 附图标记说明：  Figure 14 is a perspective view showing the structure of the water frost detecting device of the present invention. Description of the reference signs:
1、 压缩机， 1、 四通阔， 3、 室外换热器， 4、 节流装置， 5、 室内换热器， 6、 水 霜检测装置， 7、 温度传感器， 8、 结霜体， 9、 光束， 61、 发光器件， 62、 光接收器件， 63、 印刷线路板， 64、 导线， 65、 座体， 66、 网罩， 67、 固定夹， 621、 透光孔， 651、 发光器件安装部， 652、 光接收器件安装部， 653、 印刷线路板安装部， 654、 安装面， 81、 水霜。 具体实施方式 1, compressor, 1, four-way wide, 3, outdoor heat exchanger, 4, throttling device, 5, indoor heat exchanger, 6, water frost detection device, 7, temperature sensor, 8, frosting body, 9 , beam, 61, illuminating device, 62, light receiving device, 63, printed circuit board, 64, wire, 65, seat, 66, net cover, 67, fixing clip, 621, light transmission hole, 651, illuminating device installation Department, 652, light receiving device mounting part, 653, printed circuit board mounting part, 654, mounting surface, 81, water frost. detailed description
本发明公开一种热泵型空调器， 如图 5、 6、 7 , 包括有控制部件、 室外换热器 3、 室外风机、 压缩机 1、 四通阔 2、 室内换热器 5、 室内风机以及节流装置 4; 所述室外 换热器 3、 压缩机 1、 四通阔 2、 节流装置 4、 以及室内换热器 5通过冷媒管道连接形 成封闭的循环***， 冷媒在所述循环***内循环流动； 其中， 所述热泵型空调器还包 括有安装在循环***上的水霜检测装置 6 , 所述水霜检测装置 6包括有发光器件 61和 光接收器件 62 , 所述水霜检测装置 6与所述控制部件电路连接， 并将检测到的光信号 转换为电信号传输到所述控制部件。  The invention discloses a heat pump type air conditioner, as shown in Figures 5, 6, and 7, including a control component, an outdoor heat exchanger 3, an outdoor fan, a compressor 1, a four-way wide 2, an indoor heat exchanger 5, an indoor fan, and The throttling device 4; the outdoor heat exchanger 3, the compressor 1, the four-way wide 2, the throttling device 4, and the indoor heat exchanger 5 are connected by a refrigerant pipe to form a closed circulation system in which the refrigerant is The heat pump type air conditioner further includes a water frost detecting device 6 mounted on the circulation system, and the water frost detecting device 6 includes a light emitting device 61 and a light receiving device 62, and the water frost detecting device 6 Connected to the control unit circuit and convert the detected optical signal into an electrical signal for transmission to the control unit.
如图 7、 8、 10、 11、 12、 13、 14 , 所述水霜检测装置 6由座体 65作为支撑部件， 所述座体 65设置有发光器件安装部 651、 光接收器件安装部 652和印刷线路板安装部 653 , 所述发光器件安装部 651、 光接收器件安装部 652和印刷线路板安装部 653为半 封闭的腔体； 发光器件 61和光接收器件 62通过印刷线路板 63固定在座体 65上相应 的腔体中； 电信号通过与印刷线路板 63连接的导线 64传输。  As shown in FIGS. 7, 8, 10, 11, 12, 13, and 14, the water frost detecting device 6 is provided with a seat member 65 as a supporting member, and the seat body 65 is provided with a light emitting device mounting portion 651 and a light receiving device mounting portion 652. And the printed wiring board mounting portion 653, the light emitting device mounting portion 651, the light receiving device mounting portion 652, and the printed wiring board mounting portion 653 are semi-closed cavities; the light emitting device 61 and the light receiving device 62 are fixed to the seat by the printed wiring board 63. The corresponding cavity in the body 65; the electrical signal is transmitted through the wire 64 connected to the printed wiring board 63.
所述光接收器件 62朝向发光器件 61的一面为光接收面，所述座体 65靠近光接收 面处的壁面设置有透光孔 621 ; 所述水霜检测装置 6还包括有防尘保护的网罩 66和固 定夹 67 , 网罩 66位于座体 65外， 扣在所述发光器件安装部 651和光接收器件安装部 652之间位置； 固定夹 67呈旋转 90。 的 "U" 形， 卡紧在所述发光器件安装部 651和 光接收器件安装部 652下方的凹陷部位。 如图 9所示， 座体 65也可以釆用透明材质， 在座体 65外侧、 光接收器件 62朝向发光器件 61的一面设有遮光部件 10 , 遮光部件 上设有透光孔 621。  One side of the light receiving device 62 facing the light emitting device 61 is a light receiving surface, and the wall surface of the seat body 65 near the light receiving surface is provided with a light transmitting hole 621; the water frost detecting device 6 further includes a dustproof protection The mesh cover 66 and the fixing clip 67 are located outside the seat body 65 and are fastened between the light emitting device mounting portion 651 and the light receiving device mounting portion 652; the fixing clip 67 is rotated 90. The "U" shape is clamped to the recessed portion below the light emitting device mounting portion 651 and the light receiving device mounting portion 652. As shown in Fig. 9, the base 65 may also be made of a transparent material. On the outer side of the base 65, a light-shielding member 10 is disposed on a side of the light-receiving device 62 facing the light-emitting device 61, and a light-transmitting hole 621 is formed in the light-shielding member.
所述网罩 66呈盖状， 并设置有多个网孔， 位于所述座体 65的正面。  The mesh cover 66 has a cover shape and is provided with a plurality of mesh holes on the front surface of the base body 65.
在所述座体 65的背面， 位于发光器件 61、 光接收器件 62之间设置有结霜体的安 装空间， 所述座体 65设置有结霜体 8的安装面 654。  On the back surface of the base 65, a mounting space for a frosting body is provided between the light-emitting device 61 and the light-receiving device 62, and the base 65 is provided with a mounting surface 654 of the frosting body 8.
所述水霜检测装置 6另一种方式为： 利用光电开关 D301F31A, 所述光电开关呈 U 型。  Another way of the water frost detecting device 6 is to use a photoelectric switch D301F31A, which is U-shaped.
该水霜检测装置 6的工作原理是： 如图 8、 9 , 利用水霜 81作为光束通道的障碍 物， 通过对光束的遮挡、 折射， 改变光的强度， 使光接收器件输出信号发生变化。 该 装置可应用在制冷器具的除霜控制、 水霜容积控制等方面。 应用时装在需要检测水霜 的位置。  The working principle of the water frost detecting device 6 is as follows: As shown in Figs. 8 and 9, the water frost 81 is used as an obstacle of the light beam passage, and the output signal of the light receiving device is changed by blocking and refracting the light beam and changing the intensity of the light. The device can be applied to defrosting control of refrigeration appliances, water volume control, and the like. Applicable fashion is where you need to detect water frost.
本发明的热泵型空调器， 水霜检测装置装在室外换热器上或节流装置 4以及配管 的管路上容易结霜的位置， 安装面紧贴着换热器、 管路的表面； 在制冷***的管路上 还设置有温度传感器 7。 例如： In the heat pump type air conditioner of the present invention, the water frost detecting device is mounted on the outdoor heat exchanger or the throttle device 4 and the piping The location of the pipeline is easy to frost, the mounting surface is close to the surface of the heat exchanger and the pipeline; and the temperature sensor 7 is also provided on the pipeline of the refrigeration system. E.g:
实施例一：  Embodiment 1:
如图 5 , 该水霜检测装置 6用该装置在空调器自动除霜的控制， 将其装在制冷系 统节流器出口的管路上， 安装面紧贴着管表面。 当发光器件、 光接收器件之间有霜形 成并输出对应信号时， 空调器通过控制器控制进入除霜运行状态。 进入除霜运行后， 当发光器件、 光接收器件之间的水霜熔化并输出对应信号时， 结束除霜运行。  As shown in Fig. 5, the water frost detecting device 6 uses the device to automatically defrost the air conditioner, and installs it on the pipe of the outlet of the cooling system throttle, and the mounting surface is in close contact with the pipe surface. When a frost is formed between the light emitting device and the light receiving device and a corresponding signal is output, the air conditioner is controlled by the controller to enter the defrosting operation state. After entering the defrosting operation, when the water frost between the light emitting device and the light receiving device is melted and the corresponding signal is output, the defrosting operation is ended.
实施例二： 如图 6 , 该水霜检测装置 6用该装置在空调器自动除霜的控制， 将其装在室外换热 器 3的管路上， 安装面紧贴着管表面。 当发光器件、 光接收器件之间有霜形成并输出对 应信号时， 空调器通过控制器控制进入除霜运行状态。 进入除霜运行后， 当发光器件、 光接收器件之间的水霜熔化并输出对应信号时， 结束除霜运行。  Embodiment 2: As shown in Fig. 6, the water frost detecting device 6 uses the device to automatically defrost the air conditioner, and installs it on the pipeline of the outdoor heat exchanger 3, and the mounting surface is in close contact with the pipe surface. When frost is formed between the light-emitting device and the light-receiving device and a corresponding signal is output, the air conditioner is controlled by the controller to enter the defrosting operation state. After entering the defrosting operation, when the water frost between the light emitting device and the light receiving device is melted and the corresponding signal is output, the defrosting operation is ended.
如实施例一或实施例二所述热泵型空调器的除霜控制方法， 如图 1、 3 , 其中， 空 调器制热运行 11分钟后，水霜检测装置即对循环***进行检测； 当水霜检测装置检测 到循环***有霜时， 空调器转为除霜运行模式； 空调器除霜运行 13分钟后， 水霜检测 装置对循环***进行检测； 当水霜检测装置检测到循环***无霜时， 空调器转为制热 运行模式。 The defrosting control method of the heat pump type air conditioner according to the first embodiment or the second embodiment is as shown in FIG. 1 and FIG. 3, wherein after the air conditioner is operated for 11 minutes, the water frost detecting device detects the circulation system; When the frost detecting device detects that the circulation system has frost, the air conditioner switches to the defrost operation mode; after the air conditioner defrosts for 13 minutes, the water frost detecting device detects the circulation system; when the water frost detecting device detects that the circulation system is frost-free When the air conditioner is switched to the heating operation mode.
热泵型空调器的除霜控制方法， 具体包括：  The defrosting control method of the heat pump type air conditioner specifically includes:
步骤一： 除霜控制模式开始；  Step 1: The defrost control mode starts;
步骤二： 控制部件判断化霜运行标记是否 =1 , 如是， 进入步骤三， 如否， 进入步 骤八；  Step 2: The control component determines whether the defrosting operation flag is =1, and if yes, proceeds to step 3, and if not, proceeds to step VIII;
步骤三： 水霜检测装置检测是否已经完成化霜， 如是， 进入步骤五， 如否， 进入 步骤四；  Step 3: The water frost detecting device detects whether the defrosting has been completed, and if yes, proceeds to step 5, if no, proceeds to step 4;
步骤四： 退出除霜控制模式， 到步骤一；  Step 4: Exit the defrost control mode, go to step one;
步骤五： 控制部件判断延时 2min时间是否已到， 如是， 进入步骤六， 如否， 进入 步骤四；  Step 5: The control component judges whether the delay time has elapsed in 2 minutes, and if yes, proceeds to step six, if no, proceeds to step four;
步骤六： 热泵型空调器的四通阔开启、 室外风机启动， 室内风机正常启动， 进入 步骤七； 步骤七： 化霜标记清零， 进入步骤十四； Step 6: The four-way wide opening of the heat pump type air conditioner, the outdoor fan start, the indoor fan starts normally, and proceeds to step VII; Step 7: The defrosting mark is cleared, and the process proceeds to step fourteen;
步骤八： 控制部件判断是否满足压缩机最小运行时间， 如是， 进入步骤十， 如否， 进入步骤九；  Step 8: The control component determines whether the minimum running time of the compressor is satisfied, and if yes, proceeds to step 10, if no, proceeds to step IX;
步骤九： 退出除霜控制模式， 到步骤一；  Step 9: Exit the defrost control mode, go to step one;
步骤十： 控制部件判断是否满足累计运行时间， 如是， 进入步骤十一， 如否， 进 入步骤九；  Step 10: The control component determines whether the accumulated running time is satisfied, and if yes, proceeds to step XI, if no, proceeds to step IX;
步骤十一： 水霜检测装置检测是否有霜， 如是， 进入步骤十二， 如否， 进入步骤 九；  Step 11: The water frost detecting device detects whether there is frost, if yes, proceeds to step 12, if no, proceeds to step IX;
步骤十二： 热泵型空调器的四通阔停止、 室外风机停止， 室内风机停止， 进入热 泵除霜过程， 进入步骤十三；  Step 12: The four-way wide stop of the heat pump type air conditioner stops, the outdoor fan stops, the indoor fan stops, enters the heat pump defrosting process, and proceeds to step 13;
步骤十三： 控制部件设定化霜运行标记 =1 , 进入步骤十四；  Step 13: The control component sets the defrosting operation flag =1, and proceeds to step fourteen;
步骤十四： 退出除霜控制模式， 到步骤一。  Step 14: Exit the defrost control mode and go to step 1.
控制方式一： 通过单片机对信号进行处理控制， 在热泵制热运行一定时间后， 水 霜检测装置连续一定时间检测到结霜并输出对应信号， 空调器进入除霜运行。 进入除 霜运行后， 当水霜检测装置检测到无霜并输出对应信号时， 延时一定时间后结束除霜 运行。 上述热泵型空调器的除霜控制方法， 如图 2、 4 , 其中， 当水霜检测装置检测到循 环***有霜时， 控制部件的单片机通过对管路温度的变化进一步分析， 确认有霜， 空 调器转为除霜运行模式。  Control method 1: The signal is processed and controlled by the single-chip microcomputer. After the heat pump is running for a certain period of time, the water frost detecting device detects the frosting for a certain time and outputs the corresponding signal, and the air conditioner enters the defrosting operation. After entering the defrost operation, when the water frost detecting device detects no frost and outputs a corresponding signal, the defrost operation ends after a certain time delay. The defrosting control method of the above heat pump type air conditioner is as shown in Figs. 2 and 4, wherein when the water frost detecting device detects that the circulation system has frost, the single-chip microcomputer of the control unit further analyzes the change of the pipeline temperature to confirm that there is frost, The air conditioner is switched to the defrost mode.
上述热泵型空调器的除霜控制方法， 如图 2、 4 , 其中， 当水霜检测装置检测到循 环***无霜时， 控制部件的单片机通过对管路温度的变化进一步分析， 确认霜已经化 完， 空调器转为制热运行模式。  The defrosting control method of the above heat pump type air conditioner is as shown in Figs. 2 and 4, wherein when the water frost detecting device detects that the circulation system is frost-free, the single-chip microcomputer of the control unit further analyzes the change of the pipeline temperature to confirm that the frost has been turned on. After that, the air conditioner is switched to the heating mode.
所述管路温度指循环***任意一处的温度， 特别指蒸发器的温度。  The line temperature refers to the temperature of any part of the circulation system, especially the temperature of the evaporator.
控制方式二： 通过单片机对信号进行处理控制， 在热泵制热运行一定时间后， 水 霜检测装置连续一定时间检测到结霜并输出对应信号， 且温度传感器连续一定时间检 测到管路温度低于设定值时， 空调器进入除霜运行。 进入除霜运行后， 当水霜检测装 置检测到无霜并输出对应信号时， 延时一定时间， 温度传感器连续一定时间检测到管 路温度高于设定值时后结束除霜运行。  Control mode 2: The signal is processed and controlled by the single-chip microcomputer. After the heat pump is running for a certain period of time, the water frost detecting device detects the frosting and outputs the corresponding signal for a certain period of time, and the temperature sensor detects that the pipeline temperature is lower than continuous for a certain period of time. When the value is set, the air conditioner enters the defrost operation. After entering the defrost operation, when the water frost detecting device detects no frost and outputs a corresponding signal, it delays for a certain time, and the temperature sensor detects that the pipe temperature is higher than the set value for a certain period of time, and then ends the defrost operation.
以下举例说明控制方式一和控制方式二： 控制方式一例 1.水霜检测装置置于节流装置出口管路上， 安装面紧贴着管表面。 温 度传感器置于室内换热器的管路上。 当水霜检测装置连续 t lmin输出结霜信号， 且温度 传感器连续 t 2min检测到制冷***管路温度低于 T1 °C时， 空调器进入除霜运行。 进入除 霜运行后， 当水霜检测装置检测到无霜状态并输出对应信号时， 延时 t 3min结束除霜运 行。 控制方式一例 1 水霜检测装置置于配管管路上容易形成水霜的位置， 安装面紧贴管表面。 温度传感 器置于室内换热器的管路上。 当水霜检测装置连续 t lmin输出结霜信号，且温度传感器 连续 t 2min检测到管路温度低于 T1 °C时， 空调器进入除霜运行。 进入除霜运行后， 当 水霜检测装置检测到无霜状态并输出对应信号时， 延时 t 3min结束除霜运行。 控制方式一例 3.水霜检测装置置于室外换热器的管路上， 安装面紧贴管表面。 当水 霜检测装置连续 t lmin输出结霜信号，且温度传感器连续 t 2min检测到管路温度低于 T1 °C时， 空调器进入除霜运行。 进入除霜运行后， 当水霜检测装置检测到无霜状态并输出 对应信号时， 结束除霜运行。 控制方式一例 4. 水霜检测装置置于室外换热器的管路上， 安装面紧贴管表面。 当水霜检测装置连续 t lmin输出结霜信号， 空调器进入除霜运行。 进入除霜运行后， 当水霜检测装置检测到 无霜状态并输出对应信号时， 结束除霜运行。 控制方式二例 1.水霜检测装置置于节流装置出口管路上， 安装面紧贴着管表面。 温 度传感器置于室内换热器的管路上。 当水霜检测装置连续 t lmin输出结霜信号，且温度 传感器连续 t 2min检测到制冷***管路温度低于 T1 °C时， 空调器进入除霜运行。 进入 除霜运行后， 当水霜检测装置检测到无霜状态并输出对应信号时， 且温度传感器连续 t 3min检测到制冷***管路温度高于 T2 时结束除霜运行。 The following examples illustrate control mode one and control mode two: An example of the control method 1. The water frost detecting device is placed on the outlet pipe of the throttle device, and the mounting surface is in close contact with the pipe surface. The temperature sensor is placed in the line of the indoor heat exchanger. When the water frost detecting device continuously outputs the frosting signal at t lmin, and the temperature sensor detects that the cooling system pipeline temperature is lower than T1 °C continuously for t 2min, the air conditioner enters the defrosting operation. After entering the defrost operation, when the water frost detecting device detects the frost-free state and outputs the corresponding signal, the defrost operation ends at the delay t 3min. Example of control method 1 The water frost detecting device is placed on the piping pipe to easily form a water frost, and the mounting surface is in close contact with the pipe surface. The temperature sensor is placed in the line of the indoor heat exchanger. When the water frost detecting device continuously outputs the frosting signal at t lmin, and the temperature sensor detects that the pipeline temperature is lower than T1 °C continuously for t 2min, the air conditioner enters the defrosting operation. After entering the defrost operation, when the water frost detecting device detects the frost-free state and outputs the corresponding signal, the defrost operation ends at the delay t 3min. An example of the control method 3. The water frost detecting device is placed on the pipeline of the outdoor heat exchanger, and the mounting surface is in close contact with the surface of the pipe. When the water frost detecting device continuously outputs the frosting signal at t lmin, and the temperature sensor detects that the pipeline temperature is lower than T1 °C continuously for t 2min, the air conditioner enters the defrosting operation. After entering the defrosting operation, when the water frost detecting device detects the frost-free state and outputs a corresponding signal, the defrosting operation is ended. An example of the control method 4. The water frost detecting device is placed on the pipeline of the outdoor heat exchanger, and the mounting surface is in close contact with the surface of the pipe. When the water frost detecting device continuously outputs the frosting signal at t lmin, the air conditioner enters the defrosting operation. After entering the defrosting operation, when the water frost detecting device detects the frost-free state and outputs a corresponding signal, the defrosting operation is ended. Two control methods 1. The water frost detection device is placed on the outlet pipe of the throttle device, and the mounting surface is in close contact with the pipe surface. The temperature sensor is placed in the line of the indoor heat exchanger. When the water frost detecting device continuously outputs the frosting signal at t lmin, and the temperature sensor detects that the cooling system pipeline temperature is lower than T1 °C continuously for t 2min, the air conditioner enters the defrosting operation. After entering the defrosting operation, when the water frost detecting device detects the frost-free state and outputs a corresponding signal, and the temperature sensor detects that the cooling system pipeline temperature is higher than T2 continuously for t 3 min, the defrosting operation is ended.
注： 时间 t、 温度 T视具体机型的制冷***确定。  Note: Time t, temperature T is determined by the refrigeration system of the specific model.
上述所列具体实现方式为非限制性的， 对本领域的技术人员来说， 在不偏离本发明 范围内， 进行的各种改进和变化， 均属于本发明的保护范围。 The specific implementations listed above are non-limiting, and various modifications and changes made by those skilled in the art without departing from the scope of the invention are within the scope of the invention.

Claims

权利要求 、 水霜检测装置， 其特征在于： 包括有发光器件（61)和光接收器件（62), 由座体 Claims, a water frost detecting device, comprising: a light emitting device (61) and a light receiving device (62), the body
( 65 )作为支撑部件， 所述座体（ 65 )设置有发光器件安装部 ( 651 )、 光接收器件 安装部 ( 652 )和印刷线路板安装部 ( 653 ), 所述发光器件安装部 （651)、 光接收 器件安装部 ( 652 )和印刷线路板安装部 ( 653 ) 为半封闭的腔体； 发光器件（ 61 ) 和光接收器件（ 62 )通过印刷线路板 ( 63) 固定在座体（ 65 )上相应的腔体中； 电 信号通过与印刷线路板 (63)连接的导线 （64)传输。 、 如权利要求 1所述的水霜检测装置， 其特征在于： 所述光接收器件（ 62 )朝向发光 器件（ 61 )的一面为光接收面， 所述座体（ 65 )靠近光接收面处的壁面设置有透光 孔（ 621 ); 所述水霜检测装置（ 6 )还包括有防尘保护的网罩（ 66 )和固定夹（ 67 ), 网罩（66)位于座体 (65)外， 扣在所述发光器件安装部 (651)和光接收器件安 装部 ( 652 )之间位置； 固定夹（67)呈旋转 90° 的 "U" 形， 卡紧在所述发光器 件安装部 (651)和光接收器件安装部 ( 652 ) 下方的凹陷部位。 、 如权利要求 2所述的水霜检测装置， 其特征在于： 所述网罩（66)呈盖状， 并设置 有多个网孔， 位于所述座体（65) 的正面。 、 如权利要求 3所述的水霜检测装置， 其特征在于： 在所述座体（65)的背面， 位于 发光器件（ 61 )、 光接收器件（ 62 )之间设置有结霜体的安装空间， 所述座体（ 65 ) 设置有结霜体（8) 的安装面 （ 654 )。 、 如权利要求 4所述的水霜检测装置， 其特征在于： 所述水霜检测装置 （6)利用光 电开关 D301F31A, 所述光电开关呈 U型。 、 热泵型空调器， 包括有控制部件、 室外换热器（3)、 室外风机、 压缩机（1)、 四通 阔 （2)、 室内换热器（5)、 室内风机以及节流装置（4); 所述室外换热器（3)、 压 缩机（1)、 四通阔 （2)、 节流装置 （4)、 以及室内换热器（5)通过冷媒管道连接 形成封闭的循环***， 冷媒在所述循环***内循环流动； 其特征在于： 所述热泵型 空调器还包括有安装在循环***上的如权利要求 1至 5中任何一项所述的水霜检测 装置 （6), 所述水霜检测装置 （6) 与所述控制部件电路连接， 并将检测到的光信 号转换为电信号传输到所述控制部件。 7、 控制如权利要求 6所述的热泵型空调器进行除霜的方法， 其特征在于： 空调器制热 运行 t l分钟后， 水霜检测装置即对循环***进行检测； 当水霜检测装置检测到循 环***有霜时， 空调器转为除霜运行模式； 空调器除霜运行 13分钟后， 水霜检测 装置对循环***进行检测； 当水霜检测装置检测到循环***无霜时， 空调器转为制 热运行模式。 (65) As a supporting member, the base body (65) is provided with a light emitting device mounting portion (651), a light receiving device mounting portion (652), and a printed wiring board mounting portion (653), and the light emitting device mounting portion (651) The light receiving device mounting portion (652) and the printed circuit board mounting portion (653) are semi-closed cavities; the light emitting device (61) and the light receiving device (62) are fixed to the housing (65) by a printed wiring board (63) In the corresponding cavity; the electrical signal is transmitted through a wire (64) connected to the printed wiring board (63). The water frost detecting device according to claim 1, wherein: one side of the light receiving device (62) facing the light emitting device (61) is a light receiving surface, and the seat body (65) is close to the light receiving surface. The wall surface is provided with a light transmission hole (621); the water frost detecting device (6) further comprises a dustproof net cover (66) and a fixing clip (67), and the net cover (66) is located at the seat body (65) Further, the position is between the light emitting device mounting portion (651) and the light receiving device mounting portion (652); the fixing clip (67) is in a "U" shape rotated by 90°, and is fastened to the light emitting device mounting portion ( 651) and a recessed portion below the light receiving device mounting portion (652). The water frost detecting device according to claim 2, wherein the net cover (66) has a lid shape and is provided with a plurality of mesh holes on the front surface of the base body (65). The water frost detecting device according to claim 3, wherein a frosting body is disposed between the light emitting device (61) and the light receiving device (62) on the back surface of the base body (65). Space, the seat body (65) is provided with a mounting surface (654) of the frosting body (8). The water frost detecting device according to claim 4, wherein the water frost detecting device (6) uses a photoelectric switch D301F31A, and the photoelectric switch has a U shape. , Heat pump type air conditioner, including control parts, outdoor heat exchanger (3), outdoor fan, compressor (1), four-way wide (2), indoor heat exchanger (5), indoor fan and throttling device ( 4); the outdoor heat exchanger (3), the compressor (1), the four-way wide (2), the throttling device (4), and the indoor heat exchanger (5) are connected by a refrigerant pipe to form a closed circulation system The refrigerant circulates in the circulation system; the heat pump type air conditioner further includes the water frost detecting device (6) according to any one of claims 1 to 5 installed on the circulation system The water frost detecting device (6) is electrically connected to the control unit, and converts the detected optical signal into an electrical signal for transmission to the control unit. 7. The method of controlling defrosting of a heat pump type air conditioner according to claim 6, wherein: after the heating operation of the air conditioner is tl minutes, the water frost detecting device detects the circulation system; when the water frost detecting device detects When the circulation system has frost, the air conditioner switches to the defrost operation mode; after the air conditioner defrosts for 13 minutes, the water frost detection device detects the circulation system; when the water frost detection device detects that the circulation system has no frost, the air conditioner Switch to heating mode.
8、 如权利要求 7所述的热泵型空调器的除霜控制方法， 其特征在于： 具体包括： 步骤一： 除霜控制模式开始； 步骤二： 控制部件判断化霜运行标记是否 =1 , 如是， 进入步骤三， 如否， 进入步 骤八； 步骤三： 水霜检测装置检测是否已经完成化霜， 如是， 进入步骤五， 如否， 进入 步骤四； 步骤四： 退出除霜控制模式， 到步骤一； 步骤五： 控制部件判断延时 2min时间是否已到， 如是， 进入步骤六， 如否， 进入 步骤四； 步骤六： 热泵型空调器的四通阔开启、 室外风机启动， 室内风机正常启动， 进入 步骤七； 步骤七： 化霜标记清零， 进入步骤十四； 步骤八： 控制部件判断是否满足压缩机最小运行时间， 如是， 进入步骤十， 如否， 进入步骤九； 步骤九： 退出除霜控制模式， 到步骤一； 步骤十： 控制部件判断是否满足累计运行时间， 如是， 进入步骤十一， 如否， 进 入步骤九； 步骤十一： 水霜检测装置检测是否有霜， 如是， 进入步骤十二， 如否， 进入步骤 九； 步骤十二： 热泵型空调器的四通阔停止、 室外风机停止， 室内风机停止， 进入热 泵除霜过程， 进入步骤十三； 步骤十三： 控制部件设定化霜运行标记 =1 , 进入步骤十四； 步骤十四： 退出除霜控制模式， 到步骤一。 The defrosting control method of the heat pump type air conditioner according to claim 7, wherein: the first step: the defrosting control mode starts; the second step: the control unit determines whether the defrosting operation flag is =1, if Go to Step 3, if no, go to Step 8. Step 3: The water frost detection device detects whether the defrosting has been completed. If yes, go to Step 5. If no, go to Step 4; Step 4: Exit the defrosting control mode, go to the step Step 5: The control unit judges whether the delay time has reached 2min. If yes, go to step 6. If no, go to step 4. Step 6: The four-way wide open of the heat pump type air conditioner, the outdoor fan starts, and the indoor fan starts normally. Go to Step 7; Step 7: Clear the defrosting mark and go to Step 14. Step 8: The control unit determines whether the minimum running time of the compressor is met. If yes, go to Step 10. If no, go to Step IX; Step 9: Exit Defrost control mode, go to step one; Step 10: The control unit judges whether the accumulated running time is satisfied. If yes, go to step XI, if no, go to step IX; Step 11: The water frost detection device detects whether there is frost, if yes, go to step 12, if no, go to step IX; Step 12: Heat pump type air conditioner Four-way wide stop, outdoor fan stop, indoor fan stops, enters heat Pump defrosting process, go to step 13; Step 13: Control component set defrosting operation mark = 1, go to step fourteen; Step 14: Exit defrosting control mode, go to step one.
9、 如权利要求 8所述的热泵型空调器的除霜控制方法， 其特征在于： 当水霜检测装置 检测到循环***有霜时，控制部件的单片机通过对管路温度的变化进一步分析，确 认有霜， 空调器转为除霜运行模式。 9. The defrosting control method of a heat pump type air conditioner according to claim 8, wherein: when the water frost detecting means detects that the circulation system has frost, the single-chip microcomputer of the control unit further analyzes the change in the temperature of the pipeline, Confirm that there is frost, and the air conditioner switches to the defrost operation mode.
10、 如权利要求 8所述的热泵型空调器的除霜控制方法， 其特征在于： 当水霜检测 装置检测到循环***无霜时， 控制部件的单片机通过对管路温度的变化进一步分 析， 确认霜已经化完， 空调器转为制热运行模式。 10. The defrosting control method of a heat pump type air conditioner according to claim 8, wherein: when the water frost detecting means detects that the circulation system is frost-free, the single-chip microcomputer of the control unit further analyzes the change in the temperature of the pipeline, After confirming that the frost has been completed, the air conditioner is switched to the heating operation mode.
11、 如权利要求 9或 10所述的热泵型空调器的除霜控制方法， 其特征在于： 所述 管路温度指循环***任意一处的温度。 A defrosting control method for a heat pump type air conditioner according to claim 9 or 10, characterized in that said line temperature refers to a temperature at any one of the circulation systems.
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