CN105823142A - Outdoor unit set of air conditioning variable refrigerant volume system and pressure detection method - Google Patents
Outdoor unit set of air conditioning variable refrigerant volume system and pressure detection method Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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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
- F25B2500/00—Problems to be solved
- F25B2500/05—Cost reduction
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Abstract
Description
技术领域technical field
本发明涉及空调的技术领域，具体地是一种空调多联机的外机机组及压力检测方法。The invention relates to the technical field of air conditioners, in particular to a multi-connected external unit of an air conditioner and a pressure detection method.
背景技术Background technique
空调多联机又称多联式空调系统(简称VRV)，由于其优秀的部分负荷特性和显著的使用节能效果被广泛的应用到办公、生产车间等场合。Multi-split air conditioner, also known as multi-split air-conditioning system (referred to as VRV), is widely used in offices, production workshops and other occasions due to its excellent part-load characteristics and significant energy-saving effects.
对于多联机来说，为了精确的控制室内的温度从而满足用户体验的舒适性，其需要对空调系统进行高压和低压的控制，也就是说在制冷时进行低压控制，制热时进行高压控制，现有的多联机的每个外机均各自带有一个高压压力传感器和一个低压压力传感器，高压压力传感器设置于压缩机的输出端和四通阀之间的输出管路上，用于检测制热模式下的高压值，低压压力传感器设置于四通阀和压缩机的输入端之间的回流管路上，用于检测制冷模式下的低压值。但是由于多联机的外机机组是由多个外机构成的，并且整个多联机系统在制热模式下只需要读取一个外机的高压压力传感器的检测值即可，因此其余外机的高压压力传感器被闲置浪费，同理，在进行制冷模式下只需要读取一个外机的低压压力传感器的检测值即可，其余外机的低压压力传感器被闲置浪费。For multi-connected units, in order to accurately control the indoor temperature to meet the comfort of the user experience, it needs to control the high pressure and low pressure of the air conditioning system, that is to say, low pressure control is performed during cooling, and high pressure control is performed during heating. Each external unit of the existing multi-connected unit has a high-pressure pressure sensor and a low-pressure pressure sensor respectively. The high-pressure pressure sensor is set on the output pipeline between the output end of the compressor and the four-way valve to detect heating. The high pressure value in the refrigeration mode, and the low pressure pressure sensor is arranged on the return pipeline between the four-way valve and the input end of the compressor, and is used to detect the low pressure value in the refrigeration mode. However, since the multi-connected outdoor unit is composed of multiple outdoor units, and the entire multi-connected system only needs to read the detection value of the high pressure sensor of one outdoor unit in the heating mode, the high pressure of the other outdoor units The pressure sensor is idle and wasted. Similarly, in the cooling mode, it is only necessary to read the detection value of the low-pressure pressure sensor of one external unit, and the low-pressure pressure sensors of the other external units are idle and wasted.
故此，对于多联机而言，其压力传感器的数量(定义为y)为外机个数(定义为n)的2倍，即y＝2n(n≥2，n∈Z)，而实际应用过程中，有效使用的压力传感器y＝n+1(n≥2，n∈Z)。以4个外机的多联机为例，其设计的压力传感器为2*4＝8个，其中四个高压压力传感器，四个低压压力传感器，而其实际使用时，仅使用5个传感器，额外的3个压力传感器被闲置浪费。Therefore, for multi-connectors, the number of pressure sensors (defined as y) is twice the number of external units (defined as n), that is, y=2n (n≥2, n∈Z), and the actual application process In , the effective pressure sensor y=n+1 (n≥2, n∈Z) is used. Taking the multi-connection of 4 external units as an example, the pressure sensors designed are 2*4=8, including four high-pressure pressure sensors and four low-pressure pressure sensors, but in actual use, only 5 sensors are used, and additional The 3 pressure sensors are idle and wasted.
虽然单个多联机上多安装几个压力传感器对于成本而言关乎较小，但是无论是住宅、办公大厦、恒温车间、商场、以及科研院校，其均离不开空调系统的使用，因此如何解决多联机中部分压力传感器闲置浪费的问题，实为响应国家节能减排、降低成本的重要待解决的技术问题。Although the installation of several pressure sensors on a single multi-connector is relatively small in terms of cost, no matter it is a residence, an office building, a constant temperature workshop, a shopping mall, or a scientific research institution, it is inseparable from the use of the air conditioning system, so how to solve the problem? The problem of idle waste of some pressure sensors in the multi-line is actually an important technical problem to be solved in response to the national energy saving, emission reduction and cost reduction.
发明内容Contents of the invention
本发明所要解决的技术问题是：提供一种空调多联机的外机机组，其压力传感器的数量减少，从而节约成本。The technical problem to be solved by the present invention is to provide a multi-connected outdoor air conditioner unit, in which the number of pressure sensors is reduced, thereby saving costs.
本发明所采取的技术方案是：提供一种空调多联机的外机机组，它包括至少两个并联后与室内机连通的室外机，各室外机均各自包含有：一压缩机；一外机换热器；一电子膨胀阀；一制冷单向阀，制冷单向阀的两端分别与电子膨胀阀的两端连通，用于仅供室内机处于制冷模式时的冷媒通过；一四通阀，在室内机处于制冷模式时用于连通压缩机的输出端和外机换热器的一端，以及室内机的一端和压缩机的输入端，在室内机处于制热模式时切换成用于连通压缩机的输出端和室内机的一端，以及外机换热器的一端和压缩机的输入端；所述外机换热器的另一端经电子膨胀阀与室内机的另一端连通；任意一个室外机内的压缩机的输出端和四通阀之间的连接管路上设有高压压力感应器，压缩机的输入端和四通阀之间的连接管路上设有低压压力感应器，其余室外机的四通阀和外机换热器的连接管路上设有次级压力传感器。The technical solution adopted by the present invention is to provide a multi-connected outdoor unit for air conditioners, which includes at least two outdoor units that are connected in parallel and communicate with the indoor unit, and each outdoor unit includes: a compressor; an outdoor unit Heat exchanger; an electronic expansion valve; a cooling one-way valve, the two ends of the cooling one-way valve are respectively connected with the two ends of the electronic expansion valve, which are used to only pass the refrigerant when the indoor unit is in cooling mode; a four-way valve , when the indoor unit is in cooling mode, it is used to connect the output end of the compressor with one end of the heat exchanger of the outdoor unit, and one end of the indoor unit is connected with the input end of the compressor, and is switched to be used for communication when the indoor unit is in heating mode The output end of the compressor and one end of the indoor unit, and one end of the heat exchanger of the outdoor unit and the input end of the compressor; the other end of the heat exchanger of the outer unit communicates with the other end of the indoor unit through an electronic expansion valve; any one There is a high-pressure pressure sensor on the connecting pipeline between the output end of the compressor and the four-way valve in the outdoor unit, and a low-pressure pressure sensor on the connecting pipeline between the input end of the compressor and the four-way valve. There is a secondary pressure sensor on the connecting pipeline between the four-way valve of the machine and the heat exchanger of the external machine.
所述压缩机和四通阀之间设有油分离器，油分离器的输入口与压缩机的输出端连通，油分离器的出气口与四通阀连通，油分离器的出油口与压缩机的输入端连通。An oil separator is arranged between the compressor and the four-way valve, the input port of the oil separator communicates with the output end of the compressor, the gas outlet of the oil separator communicates with the four-way valve, and the oil outlet of the oil separator communicates with the output port of the compressor. The input of the compressor is connected.
所述压缩机和四通阀之间设有气液分离器，气液分离器的输入口与四通阀相连通，气液分离器的输出口与压缩机的输入口连通。A gas-liquid separator is arranged between the compressor and the four-way valve, the input port of the gas-liquid separator communicates with the four-way valve, and the output port of the gas-liquid separator communicates with the input port of the compressor.
采用以上结构后，本发明的一种空调多联机的外机机组与现有技术相比具有以下优点：大大减少了压力感应器的数量，从而节约了空调多联机的成本。After adopting the above structure, compared with the prior art, the multi-unit outdoor unit of the air conditioner of the present invention has the following advantages: the number of pressure sensors is greatly reduced, thereby saving the cost of the multi-unit air conditioner.
本发明所要解决的技术问题是：提供一种空调多联机的压力检测方法，其在不影响高压和低压的压力检测的基础上减少压力感应器的数量。The technical problem to be solved by the present invention is to provide a pressure detection method for multiple air conditioners, which reduces the number of pressure sensors without affecting the pressure detection of high pressure and low pressure.
本发明所采取的技术方案是：提供一种基于所述的空调多联机的外机机组的压力检测方法，它包括：1)、读取高压压力感应器、低压压力感应器和次级压力传感器的检测值；2)在室内机处于制冷模式时将低压压力感应器的检测值作为系统的低压值，将高压压力感应器和各次级压力传感器上的检测值作为各自对应的室外机的高压值；在室内机处于制热模式时将高压压力感应器的检测值作为系统的高压值，将低压压力感应器和各次级压力传感器上的检测值作为各自对应的室外机的低压值。The technical solution adopted by the present invention is to provide a pressure detection method based on the multi-line air conditioner external unit, which includes: 1), reading the high-pressure pressure sensor, the low-pressure pressure sensor and the secondary pressure sensor 2) When the indoor unit is in cooling mode, the detection value of the low-pressure pressure sensor is used as the low-pressure value of the system, and the detection values of the high-pressure pressure sensor and each secondary pressure sensor are used as the high-pressure value of the corresponding outdoor unit. When the indoor unit is in the heating mode, the detection value of the high-pressure pressure sensor is used as the high-pressure value of the system, and the detection values of the low-pressure pressure sensor and each secondary pressure sensor are used as the low-pressure value of the corresponding outdoor unit.
采用以上结构后，本发明的一种空调多联机的压力检测方法与现有技术相比具有以下优点：在系统检测值不变的情况下可以大大减少压力传感器的数量。After adopting the above structure, compared with the prior art, the multi-connected air conditioner pressure detection method of the present invention has the following advantages: the number of pressure sensors can be greatly reduced under the condition that the system detection value remains unchanged.
附图说明Description of drawings
图1是本发明的一种空调多联机的外机机组的分布示意图。FIG. 1 is a schematic diagram of the distribution of an outdoor unit of an air conditioner with multiple units in the present invention.
图2为图1中“A”区域的局部放大示意图。FIG. 2 is a partially enlarged schematic diagram of the area "A" in FIG. 1 .
图3为图1中“B”区域的局部放大示意图。FIG. 3 is a partially enlarged schematic diagram of the area "B" in FIG. 1 .
其中，1、室内机，2、压缩机，3、外机换热器，4、电子膨胀阀，5、制冷单向阀，6、四通阀，7、高压压力感应器，8、低压压力感应器，9、次级压力传感器，10、油分离器，11、气液分离器，12、液管截止阀，13、气管截止阀，14、风机。Among them, 1. Indoor unit, 2. Compressor, 3. Outdoor unit heat exchanger, 4. Electronic expansion valve, 5. Refrigeration check valve, 6. Four-way valve, 7. High pressure sensor, 8. Low pressure Inductor, 9. Secondary pressure sensor, 10. Oil separator, 11. Gas-liquid separator, 12. Liquid pipe stop valve, 13. Air pipe stop valve, 14. Fan.
具体实施方式detailed description
下面结合附图和具体实施方式对本发明作进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
本发明提供一种空调多联机的外机机组，它包括至少两个并联后与室内机1连通的室外机，各室外机均各自包含有：一压缩机2；一外机换热器3；一电子膨胀阀4；一制冷单向阀5，制冷单向阀5的两端分别与电子膨胀阀4的两端连通，用于仅供室内机1处于制冷模式时的冷媒通过；一四通阀6，在室内机1处于制冷模式时用于连通压缩机2的输出端和外机换热器3的一端，以及室内机1的一端和压缩机2的输入端，在室内机1处于制热模式时切换成用于连通压缩机2的输出端和室内机1的一端，以及外机换热器3的一端和压缩机2的输入端；所述外机换热器3的另一端经电子膨胀阀4与室内机1的另一端连通；任意一个室外机内的压缩机2的输出端和四通阀6之间的连接管路上设有高压压力感应器7，压缩机2的输入端和四通阀6之间的连接管路上设有低压压力感应器8，其余室外机的四通阀6和外机换热器3的连接管路上设有次级压力传感器9。The present invention provides a multi-connected outdoor unit of an air conditioner, which includes at least two outdoor units connected in parallel to the indoor unit 1, and each outdoor unit includes: a compressor 2; an outdoor unit heat exchanger 3; An electronic expansion valve 4; a refrigeration one-way valve 5, the two ends of the refrigeration one-way valve 5 are respectively connected with the two ends of the electronic expansion valve 4, and are used to only pass the refrigerant when the indoor unit 1 is in the cooling mode; a four-way The valve 6 is used to communicate the output end of the compressor 2 with one end of the heat exchanger 3 of the outdoor unit, and one end of the indoor unit 1 and the input end of the compressor 2 when the indoor unit 1 is in cooling mode. In heat mode, it is switched to connect the output end of the compressor 2 with one end of the indoor unit 1, and one end of the external heat exchanger 3 and the input end of the compressor 2; the other end of the external heat exchanger 3 is passed through The electronic expansion valve 4 communicates with the other end of the indoor unit 1; a high-pressure pressure sensor 7 is provided on the connecting pipeline between the output end of the compressor 2 in any outdoor unit and the four-way valve 6, and the input end of the compressor 2 There is a low-pressure pressure sensor 8 on the connecting pipeline between the four-way valve 6 and the secondary pressure sensor 9 on the connecting pipeline between the four-way valve 6 of the other outdoor units and the heat exchanger 3 of the outdoor unit.
所述压缩机2和四通阀6之间设有油分离器10，油分离器10的输入口与压缩机2的输出端连通，油分离器10的出气口与四通阀6连通，油分离器10的出油口与压缩机2的输入端连通。An oil separator 10 is arranged between the compressor 2 and the four-way valve 6, the input port of the oil separator 10 communicates with the output end of the compressor 2, the gas outlet of the oil separator 10 communicates with the four-way valve 6, and the oil separator 10 communicates with the output port of the compressor 2. The oil outlet of the separator 10 communicates with the input end of the compressor 2 .
所述压缩机2和四通阀6之间设有气液分离器11，气液分离器11的输入口与四通阀6相连通，气液分离器11的输出口与压缩机2的输入口连通。A gas-liquid separator 11 is arranged between the compressor 2 and the four-way valve 6, the input port of the gas-liquid separator 11 is connected with the four-way valve 6, and the output port of the gas-liquid separator 11 is connected with the input port of the compressor 2. The mouth is connected.
所述电子膨胀阀4与室内机1之间的连接管路上设有液管截止阀12，四通阀和室内机的连接管路上设有气管截止阀13，所述的液管截止阀12和气管截止阀13是用于室内机1和室外机进行分装时的启闭开关。A liquid pipe shut-off valve 12 is provided on the connecting pipeline between the electronic expansion valve 4 and the indoor unit 1, a gas pipe shut-off valve 13 is provided on the connecting pipeline between the four-way valve and the indoor unit, and the liquid pipe shut-off valve 12 and The trachea stop valve 13 is an on-off switch when the indoor unit 1 and the outdoor unit are subpackaged.
当然上述的外机换热器在进行换热过程中需要增设风机14用于提高换热效果。Of course, the above-mentioned external unit heat exchanger needs to add a fan 14 to improve the heat exchange effect during the heat exchange process.
上述的四通阀6包括第一接口、第二接口、第三接口和第四接口，所述四通阀6内的第一接口和第二接口连通时第三接口和第四接口连通，或第一接口和第三接口连通时第二接口和第四接口。所述的四通阀6的第一接口与压缩机的输出口连通，第二接口与外机换热器3背离电子膨胀阀4的一端连通，第三接口与室内机1的远离电子膨胀阀4的另一端连通，第四接口与压缩机2的输入端连通。The above-mentioned four-way valve 6 includes a first port, a second port, a third port and a fourth port, and when the first port and the second port in the four-way valve 6 are connected, the third port is connected with the fourth port, or When the first interface is connected to the third interface, the second interface is connected to the fourth interface. The first port of the four-way valve 6 communicates with the output port of the compressor, the second port communicates with the end of the heat exchanger 3 of the external unit away from the electronic expansion valve 4 , and the third port communicates with the end of the indoor unit 1 away from the electronic expansion valve 4 . The other end of 4 is communicated, and the fourth interface is communicated with the input end of compressor 2 .
故此，在室内机1处于制冷模式下时，冷媒从压缩机2的输入端开始，依序经过油液分离器10、四通阀6的第一接口、四通阀6的第二接口、外机换热器3、制冷单向阀5(其中少部分经过电子膨胀阀4)、室内机1、四通阀6的第三接口、四通阀6的第四接口、气液分离器11，并最终回流至压缩机2。Therefore, when the indoor unit 1 is in the cooling mode, the refrigerant starts from the input end of the compressor 2 and passes through the oil-liquid separator 10, the first port of the four-way valve 6, the second port of the four-way valve 6, the outer Machine heat exchanger 3, refrigeration check valve 5 (a small part of which passes through electronic expansion valve 4), indoor unit 1, the third port of four-way valve 6, the fourth port of four-way valve 6, gas-liquid separator 11, And finally return to compressor 2.
同理，在室内机1处于制热模式下时，冷媒从压缩机2的输入端开始，依序经过油液分离器10、四通阀6的第一接口、四通阀6的第三接口、室内机1、电子膨胀阀4、外机换热器3、四通阀的第二接口、四通阀的第四接口、油液分离器10，并最终回流至压缩机2。Similarly, when the indoor unit 1 is in the heating mode, the refrigerant starts from the input end of the compressor 2 and passes through the oil-liquid separator 10, the first port of the four-way valve 6, and the third port of the four-way valve 6 in sequence. , indoor unit 1, electronic expansion valve 4, external unit heat exchanger 3, the second port of the four-way valve, the fourth port of the four-way valve, the oil-liquid separator 10, and finally returns to the compressor 2.
上述的制冷单向阀5与电子膨胀阀4并联，即如图所示，冷媒在室内机1处于制冷模式下时从左往右经过电子膨胀阀4和制冷单向阀5，大部分的冷媒经制冷单向阀5流入室内机1内，小部分的冷媒经电子膨胀阀4进入室内机1，反之，冷媒在室内机1处于制热模式下时从右往左经过电子膨胀阀4，而不会从制冷单向阀5内流通。The above cooling check valve 5 is connected in parallel with the electronic expansion valve 4, that is, as shown in the figure, when the indoor unit 1 is in the cooling mode, the refrigerant passes through the electronic expansion valve 4 and the cooling check valve 5 from left to right, most of the refrigerant The refrigerant flows into the indoor unit 1 through the cooling check valve 5, and a small part of the refrigerant enters the indoor unit 1 through the electronic expansion valve 4. On the contrary, when the indoor unit 1 is in the heating mode, the refrigerant passes through the electronic expansion valve 4 from right to left, and It will not flow through the refrigeration check valve 5.
一种基于权利要求1所述的空调多联机的外机机组的压力检测方法，它包括：A pressure detection method based on the air-conditioning multi-connected outdoor unit according to claim 1, comprising:
1)、读取高压压力感应器7、低压压力感应器8和次级压力传感器9的检测值；1), read the detection value of high-pressure pressure sensor 7, low-pressure pressure sensor 8 and secondary pressure sensor 9;
2)、在室内机1处于制冷模式时将低压压力感应器8的检测值作为系统的低压值，将高压压力感应器7和各次级压力传感器9上的检测值作为各自对应的室外机的高压值；在室内机1处于制热模式时将高压压力感应器7的检测值作为系统的高压值，将低压压力感应器8和各次级压力传感器9上的检测值作为各自对应的室外机的低压值。2) When the indoor unit 1 is in the cooling mode, the detection value of the low-pressure pressure sensor 8 is used as the low-pressure value of the system, and the detection values of the high-pressure pressure sensor 7 and each secondary pressure sensor 9 are used as the corresponding outdoor unit. High pressure value; when the indoor unit 1 is in the heating mode, the detection value of the high pressure pressure sensor 7 is used as the high pressure value of the system, and the detection values of the low pressure pressure sensor 8 and each secondary pressure sensor 9 are used as the corresponding outdoor unit low pressure value.
当然室内机1内必然含有控制器，控制器通过读取高压压力感应器7、低压压力感应器8和次级压力传感器9上反馈的检测信号进行控制压缩机2、风机和电磁阀的启闭。Of course, the indoor unit 1 must contain a controller. The controller controls the opening and closing of the compressor 2, the fan and the solenoid valve by reading the detection signals fed back from the high-pressure pressure sensor 7, the low-pressure pressure sensor 8 and the secondary pressure sensor 9. .
以上就本发明较佳的实施例作了说明，但不能理解为是对权利要求的限制。本发明不仅局限于以上实施例，其具体结构允许有变化，凡在本发明独立要求的保护范围内所作的各种变化均在本发明的保护范围内。The preferred embodiments of the present invention have been described above, but should not be construed as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to change, and all the various changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.
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