Relay control device and air conditioning system

Abstract

The invention discloses a relay control device and an air conditioning system, and is applied to the technical field of air conditioners. The relay control device is applied to the air conditioning system, the air conditioning system comprises indoor equipment and outdoor equipment, and the device comprises a main pipeline, a plurality of branch pipelines and a plurality of valves. The main pipeline is used for being connected with the outdoor equipment; the branch pipeline is communicated with the main pipeline, and the branch pipeline is used for being communicated with the indoor equipment; and each branch pipeline is provided with the valve. The one-driving-one air conditioning system can be expanded into the multi-split air conditioning system only by additionally arranging the relay control device, the cost is low, and therefore the application range and the application scene of the one-driving-one air conditioning system are expanded.

Description

Technical Field

[0001] The present application belongs to the technical field of air conditioning, and in particular, relates to a relay control device and an air conditioning system. Background Art

[0002] At present, the one-to-one air-conditioning system can no longer meet people's needs. People need to cool and heat multiple rooms with multiple indoor units at the same time; or, need to heat and make hot water at the same time. This requires the use of a one-to-many multi-split air-conditioning system.

[0003] However, the cost of directly replacing the multi-split air-conditioning system or converting the one-to-one air-conditioning system into a multi-split air-conditioning system is relatively high, which greatly limits the use scope and application scenarios of the one-to-one air-conditioning system. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a relay control device and an air conditioning system, which can expand a one-to-one air conditioning system into a multi-split air conditioning system by simply installing a relay control device, at a low cost, thereby expanding the use scope and application scenarios of the one-to-one air conditioning system.

[0005] In a first aspect, the present application provides a relay control device, which is applied to an air conditioning system, wherein the air conditioning system includes indoor equipment and outdoor equipment, and the device includes: A main pipeline, used for connecting the outdoor equipment; A plurality of branch pipes, the branch pipes being connected to the main pipe, and the branch pipes being used to connect to the indoor equipment; and A plurality of valves are provided on each branch pipeline.

[0006] In a second aspect, the present application provides an air conditioning system, comprising an outdoor device, a plurality of indoor devices and a relay control device of the above-mentioned embodiment.

[0007] The relay control device and air-conditioning system provided in the embodiment of the present application, by adding a relay control device to the one-to-one air-conditioning system, the main line of the relay control device is connected to the main line of the outdoor equipment (such as the outdoor unit), and the relay control device also includes a plurality of branch lines connected to the main line, each branch line can be connected to an indoor equipment (such as the indoor unit or hydraulic equipment), so that the refrigerant of the outdoor equipment can flow to each branch line, and then enter each indoor equipment, so that one-to-many can be achieved, so that the one-to-one air-conditioning system can be expanded into a multi-split air-conditioning system without other modification measures, the cost is low, and it is conducive to expanding the scope of use and application scenarios of the one-to-one air-conditioning system.

[0008] Each branch pipe of the relay control device is equipped with a valve, which can not only realize the flow regulation of each indoor equipment, but also block the refrigerant leakage in time, thereby improving the safety of the air-conditioning system.

[0009] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a structural schematic diagram of a relay control device provided in an embodiment of the present application; Figure 2 It is a structural schematic diagram of the air conditioning system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0011] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0012] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0013] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three, unless otherwise clearly and specifically defined.

[0014] See also Figure 1 and Figure 2The relay control device 10 of the embodiment of the present application is applied to an air conditioning system 100, which includes an indoor device 20 and an outdoor device 30. The relay control device 10 includes a main line 11, a plurality of branch lines 12, and a plurality of valves 13. The main line 11 is used to connect the outdoor device 30; the branch line 12 is connected to the main line 11, and the branch line 12 is used to connect the indoor device 20; each branch line 12 is provided with a valve 13.

[0015] The air conditioning system 100 is a device combination for adjusting air environment parameters (such as temperature, humidity, cleanliness, air flow rate, etc.) in a room or a specific space.

[0016] Among them, the indoor equipment 20 is used to directly process the indoor air to achieve the purpose of regulating the indoor environment. For example, the indoor unit includes an indoor heat exchanger, an indoor fan and a throttling component. Usually, the throttling component of the indoor unit is a thermal expansion valve, a throttling valve core or a capillary tube, and this part of the throttling is not controlled by the outdoor unit. For example, hydraulic equipment is a device that integrates a water pump, valve, filter, constant pressure water replenishment device, water pump control electric control cabinet, etc. in a box, and is mainly used for the circulation and transportation of refrigerant water, cooling water, and sanitary hot water in central air-conditioning water systems such as ground source heat pumps, air source heat pumps, and air cooling modules.

[0017] The outdoor device 30 is used to provide power for the circulation of the refrigerant and to exchange heat with the outside world. For example, the outdoor unit includes a compressor, an outdoor fan, a heat exchanger, a four-way valve, a throttling component and other components, which can realize the switching between the cooling and heating modes, and output the cooling refrigerant or the heating refrigerant to the outside through the refrigerant pipeline.

[0018] In some embodiments, the main line 11 is a line connected to the outdoor device 30. The main line 11 includes a main gas pipe 111 and a main liquid pipe 112. The main gas pipe 111 is connected to the gas pipe of the outdoor device 30, and the main liquid pipe 112 is connected to the liquid pipe of the outdoor device 30.

[0019] The indoor unit or outdoor unit of the air conditioner generally includes an air pipe and a liquid pipe. The differences between the air pipe and the liquid pipe are as follows: (1) Pipe diameter General situation: In common household air conditioners and most air conditioning systems 100, the liquid pipe is usually thinner than the gas pipe.

[0020] Special cases: In some large central air-conditioning systems or specially designed air-conditioning systems, the diameters of the liquid pipe and the gas pipe may vary due to differences in cooling capacity, refrigerant flow rate and other factors, but the overall principle that the liquid pipe is relatively thin remains basically unchanged.

[0021] (2) Connection location and function Refrigeration mode: The liquid pipe is the pipe from the condenser outlet to the expansion valve inlet. Its function is to transport the high-pressure liquid refrigerant after cooling and liquefaction in the condenser to the expansion valve for throttling and pressure reduction. The gas pipe is the pipe from the expansion valve outlet to the compressor inlet. It is responsible for transporting the low-temperature and low-pressure gaseous refrigerant back to the compressor after absorbing heat and evaporating in the evaporator.

[0022] Heating mode: When the heat pump air conditioner is heating, the situation is the opposite. The high-temperature and high-pressure gaseous refrigerant compressed by the compressor flows to the condenser of the indoor unit through the liquid pipe, releases heat indoors and condenses into liquid, then flows back to the evaporator of the outdoor unit through the gas pipe, evaporates and absorbs heat before returning to the compressor.

[0023] Therefore, by providing the main gas pipe 111 and the main liquid pipe 112, the gas pipe and the liquid pipe of the outdoor device 30 are connected to ensure that the refrigerant can circulate.

[0024] In some embodiments, the branch pipe 12 is a pipe connected to the indoor device 20. The branch pipe 12 includes a bronchial pipe 121 and a branch liquid pipe 122. One end of the bronchial pipe 121 is connected to the air pipe of the indoor device 20, and the other end is connected to the main air pipe 111; one end of the branch liquid pipe 122 is connected to the liquid pipe of the indoor device 20, and the other end is connected to the main liquid pipe 112.

[0025] Optionally, the branch pipes 12 and the indoor devices 20 are connected in a one-to-one correspondence.

[0026] Optionally, the branch pipeline 12 may include one or more branch pipelines, such as 2, 3, 4 branch pipelines, etc.

[0027] After flowing out of the main pipe 11 , the refrigerant passes through each branch pipe 12 in sequence, and then enters each indoor device 20 to realize the function of each indoor device 20 .

[0028] In some embodiments, in order to control each branch pipeline 12, a valve 13 may be provided in each branch pipeline 12. By controlling the opening of the valve 13, the flow of each branch pipeline 12 can be controlled or the refrigerant flowing from the main pipeline 11 to the branch pipeline 12 can be blocked.

[0029] Optionally, both the bronchus 121 and the bronchus 122 are provided with valves 13 .

[0030] The branch liquid pipes 122 are all provided with valves 13, which can adjust the refrigerant flow of the corresponding indoor equipment 20. Alternatively, when the refrigerant leaks, the valve 13 of the branch liquid pipe 122 is closed to block the refrigerant leakage.

[0031] It is understandable that the electronic expansion valve of the indoor device 20 is usually only in the liquid pipe, and the gas pipe may also leak refrigerant from other outdoor units or indoor units. Therefore, if the valve 13 is only set on the branch liquid pipe 122, it cannot be effectively isolated when the refrigerant leaks.

[0032] Therefore, the present application also provides a valve 13 on the bronchus 121. In case of refrigerant leakage, the valve 13 on the bronchus 121 can be closed to effectively prevent the refrigerant from leaking.

[0033] The relay control device 10 provided in the embodiment of the present application can be installed in a one-to-one air-conditioning system 100, so that the main line 11 of the relay control device 10 is connected to the pipeline of the outdoor equipment 30 (such as an outdoor unit), and the relay control device 10 also includes a plurality of branch pipes 12 connected to the main line 11, each branch pipe 12 can be connected to an indoor device 20 (such as an indoor unit or a hydraulic device), so that the refrigerant of the outdoor device 30 can flow to each branch pipe 12, and then enter each indoor device 20, so that one-to-many can be achieved, so that the one-to-one air-conditioning system 100 can be expanded into a multi-split air-conditioning system 100 without other modification measures, with low cost, which is conducive to expanding the scope of use and application scenarios of the one-to-one air-conditioning system 100.

[0034] Each branch pipe 12 of the relay control device 10 is provided with a valve 13 , which can not only realize flow regulation of each indoor device 20 , but also timely block the refrigerant leakage, thereby improving the safety of the air-conditioning system 100 .

[0035] In some embodiments, the relay control device 10 also includes a controller 14, which includes multiple communication interfaces, including a first communication interface and a second communication interface, the first communication interface is connected to the outdoor device 30, and each second communication interface is communicatively connected to an indoor device 20.

[0036] It can be understood that to realize a multi-connected system, in addition to realizing pipeline connection, it is also necessary to realize communication connection between the indoor device 20 and the outdoor device 30.

[0037] Specifically, the controller 14 serves as an information processing and communication transfer center of the relay control device 10 , and can serve as a bridge between the indoor device 20 and the outdoor device 30 to achieve communication between the indoor device 20 and the outdoor device 30 .

[0038] The controller 14 can also communicate with the indoor device 20 and the outdoor device 30 to achieve control of each valve 13 of the relay control device 10 .

[0039] The controller 14 includes a plurality of communication interfaces, a first communication interface being communicatively connected to an outdoor device 30 , and a second communication interface being communicatively connected to an indoor device 20 .

[0040] That is, the outdoor device 30 and each indoor device 20 are connected to the communication interface set by the controller 14, and the controller 14 can read the information of any communication interface, or transmit information to the indoor device 20 or the outdoor device 30 through any communication interface.

[0041] Optionally, the communication interface includes at least one of a serial communication interface and a dry node communication interface.

[0042] For example, the serial communication interface may be an RS-485 interface, a UART interface, or the like.

[0043] Optionally, the controller 14 includes a wireless communication module, and the outdoor device 30 and each indoor device 20 are assigned different communication addresses. The controller 14 communicates with any device through the wireless communication module and the communication address, and any device is an indoor device 20 or an outdoor device 30.

[0044] In addition to the wired communication method, the controller 14 can wirelessly communicate with the indoor device 20 and the outdoor device 30. When wirelessly communicating, it is necessary to first assign different communication addresses to the outdoor device 30, each indoor device 20 and the wireless communication module, so as to realize wireless communication between the wireless communication module, the indoor device 20 and the outdoor device 30.

[0045] In some embodiments, the controller 14 is configured to communicate with the outdoor device 30 and / or the indoor device 20 to control the opening degree of each valve 13 .

[0046] The controller 14 can realize flow control of each branch pipe 12. The flow control can be based on a preset strategy, such as achieving a balanced refrigerant flow in each branch pipe 12, or based on the cooling or heating requirements of any indoor equipment 20, adaptively adjusting the refrigerant flow of the corresponding branch pipe 12, so that the refrigerant flow matches the demand.

[0047] Optionally, communicating with the outdoor device 30 and / or the indoor device 20 to control the opening of each valve 13 includes: When receiving a power-on command of any target indoor device, the valve 13 on the branch pipe 12 connected to the target indoor device is controlled to open, and a first control signal is sent to the outdoor device 30, so that the outdoor device 30 operates based on the working condition corresponding to the first control signal; When a shutdown command of any target indoor device is received, the valve 13 on the branch pipe 12 connected to the target indoor device is controlled to be closed.

[0048] Specifically, when the user turns on any target indoor device, the target indoor device will send a power-on command to the controller 14, and the controller 14 can control the valve 13 on the branch pipe 12 connected to the target indoor device to open (such as the valve 13 of the branch pipe 121 and the valve 13 of the branch liquid pipe 122 of the branch pipe 12), and send a first control signal to the outdoor device 30, so that the outdoor device 30 operates based on the working condition corresponding to the first control signal (such as operating in cooling mode, heating mode, etc.).

[0049] When the user shuts down any target indoor device, the target indoor device will send a shutdown command to the controller 14, and the controller 14 can control the valve 13 on the branch pipe 12 connected to the target indoor device to close (such as the valve 13 of the branch pipe 121 and the valve 13 of the branch liquid pipe 122 of the branch pipe 12).

[0050] If all indoor devices 20 except the target indoor device have been shut down, a shutdown signal can also be sent to the outdoor device 30 to shut down the outdoor device 30. If other indoor devices 20 are still running except the target indoor device, the outdoor device 30 needs to continue to run.

[0051] Optionally, controlling the valve 13 on the branch pipe 12 connected to the target indoor equipment to be closed includes: Control the valve 13 on the branch liquid pipe 122 connected to the target indoor device to close, the valve 13 on the branch gas pipe 121 to open, and control the outdoor device 30 to operate in the cooling mode for a preset time; When the outdoor device 30 operates in the cooling mode for a preset period of time, the valve 13 on the bronchial pipe 121 is controlled to be closed.

[0052] Specifically, when any target indoor device is shut down, in order to avoid the refrigerant remaining in the branch pipe 12 after the valve 13 of the branch pipe 12 is closed, thereby reducing the utilization rate of the refrigerant, the valve 13 on the branch liquid pipe 122 connected to the target indoor device can be controlled to be closed, the valve 13 on the bronchial pipe 121 can be opened, and the outdoor device 30 can be controlled to operate in the cooling mode for a preset period of time. At this time, the refrigerant will be recovered from the bronchial pipe 121 to the compressor of the outdoor device 30 to achieve refrigerant recovery. After running in the cooling mode for a preset period of time (an empirical value), it can be determined that the refrigerant recovery is completed. At this time, the valve 13 on the bronchial pipe 121 can be closed to achieve the blocking of the branch pipe 12 corresponding to the shut down indoor device 20.

[0053] Optionally, communicating with the outdoor device 30 and / or the indoor device 20 to control the opening of each valve 13 includes: When a temperature reaching instruction indicating that the temperature of any target indoor equipment has reached the set temperature or a refrigerant leakage instruction indicating that the refrigerant has leaked is received, the valve 13 of the bronchial pipe 121 is controlled to be closed.

[0054] Specifically, after any target indoor device has been running for a certain period of time, the indoor temperature has reached the set temperature, and the target indoor device can send a temperature reaching instruction to the controller 14, indicating that the indoor temperature has been adjusted and there is no need to continue running. Therefore, the controller 14 controls the valve 13 of the bronchial pipe 121 to close, so that the refrigerant flows to other indoor devices 20 that are still running, thereby improving the utilization rate of the refrigerant.

[0055] Alternatively, during the operation of any target indoor equipment, the refrigerant sensor installed therein detects a refrigerant leak, and a refrigerant leak instruction indicating the refrigerant leak can be sent to the controller 14. In order to prevent the refrigerant from continuing to leak, the controller 14 can control the valve 13 of the bronchial pipe 121 to close.

[0056] Optionally, the relay control device 10 may also be provided with a refrigerant sensor, and the controller 14 may obtain the collected information of the refrigerant sensor to determine whether the refrigerant is leaking. When the refrigerant sensor of the relay control device 10 detects a refrigerant leakage, each branch pipe 12 in the relay control device 10 may be closed to avoid further leakage of the refrigerant.

[0057] In some embodiments, the device further includes a temperature sensor, which is disposed in the branch pipe 12 to detect the temperature of the branch pipe 12. The controller 14 is further configured to: Based on the temperature of each branch pipe 12 , the opening of the valve 13 of each branch pipe 12 is adjusted to make the temperature of each branch pipe 12 equal.

[0058] Specifically, a temperature sensor can be set in the branch pipeline 12, and the cooling or heating capacity of each branch pipeline 12 can be determined by the temperature of the temperature sensor. By adjusting the opening of the valve 13 of each branch pipeline 12 (specifically, it can be the valve 13 of the branch liquid pipe 122), the temperature of each branch pipeline 12 is balanced (for example, the temperature difference between any two branch pipelines 12 is less than a preset threshold). At this time, the cooling or heating capacity of each branch pipeline 12 is basically the same, thereby avoiding large deviations in the temperature control efficiency of the room where each indoor equipment 20 is located.

[0059] In some embodiments, the bronchus 121 and the branch liquid pipe 122 are both provided with a valve 13 and a temperature sensor, and based on the temperature of each branch pipe 12, the opening of the valve 13 of each branch pipe 12 is adjusted to make the temperature of each branch pipe 12 balanced, including: When the air conditioning system 100 operates in the cooling mode, the opening of the valve 13 of each branch liquid pipe 122 is adjusted based on the temperature of each branch pipe 121 so that the temperature of each branch pipe 121 is balanced; When the air conditioning system 100 operates in the heating mode, the opening of the valve 13 of each branch liquid pipe 122 is adjusted based on the temperature of the branch liquid pipe 122 of each branch pipeline 12 to make the temperature of each branch liquid pipe 122 balanced.

[0060] Specifically, in the cooling mode or in the refrigeration mode, the reference and adjustment method for performing temperature equalization of the branch pipe 12 are different.

[0061] (1) Different standards for temperature balance When the air conditioning system 100 operates in cooling mode, temperature equalization is performed based on the temperature of each branch pipe 121 , and when the air conditioning system 100 operates in heating mode, temperature equalization is performed based on the temperature of each branch pipe 122 .

[0062] (2) Different adjustment methods When the air conditioning system 100 operates in the cooling mode, the opening of the valve 13 of the branch liquid pipe 122 is adjusted based on the temperature of each branch liquid pipe 121, and the temperature of the branch liquid pipe 121 is proportional to the opening of the valve 13 of the branch liquid pipe 122. When the air conditioning system 100 operates in the heating mode, the opening of the valve 13 of the branch liquid pipe 122 is adjusted based on the temperature of each branch liquid pipe 122, and the temperature of the branch liquid pipe 121 is inversely proportional to the opening of the valve 13 of the branch liquid pipe 122.

[0063] In some embodiments, the controller 14 is further configured to: In the case where the air conditioning system 100 operates in the cooling mode, the superheat is determined based on the temperature difference between the temperature of the branch pipe 121 and the temperature of the branch liquid pipe 122 of each branch line 12; Based on the superheat corresponding to the branch line 12, the opening of the valve 13 of the branch liquid pipe 122 is adjusted so that the superheat is within a preset superheat range.

[0064] Specifically, in order to ensure cooling efficiency, when the air conditioning system 100 operates in cooling mode, the superheat degree may be determined based on the temperature difference between the temperature of the air branch pipe 121 and the temperature of the liquid branch pipe 122 of each branch pipe 12 .

[0065] It can be understood that when the superheat is within the preset superheat range, the refrigeration efficiency is high. Therefore, the opening of the branch liquid pipe 122 can be adjusted based on the superheat corresponding to the branch pipe 12 so that the superheat is within the preset superheat range.

[0066] In one example, the temperature of the temperature sensor of the bronchial pipe 121 is Ta_gas, and the temperature of the temperature sensor of the bronchial pipe 122 is Ta_liquid. When the system is in cooling mode, Ta_gas and Ta_liquid are compared. When Ta_gas-Ta_liquid≥a-piping correction value, the liquid circuit electronic expansion valve (such as valve 13 of the bronchial pipe 122) is opened to a large value △P, and then detected and adjusted after a period of time. When Ta_gas-Ta_liquid<b-piping correction value, the liquid circuit electronic expansion valve is closed to a small value △P.

[0067] Among them, a is a preset value considering the heat exchange effect of the indoor unit, such as 3~5 degrees Celsius (℃); b is a preset value of 0~2℃, usually b<a, to ensure the control of hysteresis.

[0068] Among them, the piping correction value is based on the pressure drop and heat leakage correction parameters corresponding to the downstream piping length entered during installation. For example, when the piping length is 0~5 meters (m), the piping correction is 1°C, 5~10m is 1.5°C, and 10~20m is 2°C.

[0069] Among them, △P can be a value based on the current opening change, or it can be a fixed step size, such as for a 500P electronic expansion valve, the fixed step size can be 8~48P, preferably 24p. The variable step size depends on the current opening range of the electronic expansion valve, such as 16P for 0~250P, and 32P for 250~500P.

[0070] In some embodiments, the bronchus 121 and the bronchial tube 122 are both provided with valves 13 and temperature sensors, and the controller 14 is also used for: When the air conditioning system 100 operates in the heating mode, the opening degree of the branch liquid pipe 122 is adjusted based on the temperature of the branch liquid pipe 122 of each branch line 12 and the average temperature of each branch liquid pipe 122 .

[0071] Specifically, in order to ensure heating efficiency, when the air conditioning system 100 operates in the heating mode, the average temperature of each branch liquid pipe 122 can be obtained so that the temperature of each branch liquid pipe 122 is close to the average temperature.

[0072] For example, when the current temperature of the branch pipe 122 is higher than the average temperature, the opening of the valve 13 of the branch pipe 122 can be reduced, and when the current temperature of the branch pipe 122 is lower than the average temperature, the opening of the valve 13 of the branch pipe 122 can be increased.

[0073] In one example, when the system is in heating mode, the opening of the liquid circuit electronic expansion valve can be controlled by comparing the detected Ta_liquid of the current circuit with the Ta_liquid of other circuits.

[0074] When Ta_liquid<T_liquidaverage+c, the electronic expansion valve on the liquid side of this circuit opens wider.

[0075] When Ta_liquid ≥ T_liquid average + d, the electronic expansion valve on the liquid side of this circuit is closed.

[0076] Among them, c and d are preset values ​​considering the stability of regulation, such as c=-2℃; d=2℃ Among them, T_liquid average is the arithmetic average of the temperature sensors of the branch liquid pipes 122 of each branch pipeline 12.

[0077] In some embodiments, the valve 13 on the branch liquid pipe 122 of the branch pipe 12 is an electronic expansion valve, and the valve 13 on the branch gas pipe 121 of the branch pipe 12 is an electric ball valve.

[0078] In this way, the refrigerant flow rate can be controlled through the valve 13 on the branch pipe 122 of the electronic expansion valve, and the refrigerant can be blocked through the valve 13 on the branch pipe 121 of the electric ball valve, so that the refrigerant can be effectively blocked when the refrigerant leaks.

[0079] The air conditioning system 100 according to the embodiment of the present application includes an outdoor device 30, a plurality of indoor devices 20, and the relay control device 10 according to any one of the above-mentioned embodiments.

[0080] In an example, see Figure 1 and Figure 2 , using the relay control device 10 of the present application as a relay, the upstream is connected to a traditional one-to-one outdoor unit, and the downstream can be connected to multiple traditional one-to-one indoor units.

[0081] The relay control device 10 of the present application can realize the individual opening or full opening of indoor units A and B. The general control method is: When indoor units A and B are fully turned on for cooling or heating, the relay control device 10 receives the start-up signal of indoor units A and B, and the corresponding valves A1, A2, B1, and B2 of A and B are opened. At the same time, the relay control device 10 gives the outdoor unit a control signal of high capacity demand, and the outdoor unit runs at the highest compressor frequency and fan speed.

[0082] Furthermore, corresponding temperature sensors can be arranged in lines A and B to monitor the temperatures of lines A and B. Based on the temperatures of lines A and B, temperature balance can be achieved to ensure that the temperature regulation efficiency of each indoor unit is relatively balanced.

[0083] When the indoor unit A reaches the temperature and shuts down, the corresponding indoor unit A will transmit a shutdown signal to the A port of the relay control device 10, and the valve 13 (such as valve A2, or valves A1 and A2) of the A circuit will be controlled to close, thereby shutting down the indoor unit A.

[0084] In another example, see again Figure 1 and Figure 2 , when heating and hot water are simultaneously realized. The relay control device 10 of the present application can realize the individual opening or full opening of the indoor unit A and the hydraulic equipment. The general control method is: For cooling or heating only, close the B-way valve 13 (such as valves B1 and B2) and only open the A-way valve 13 (such as valves A1 and A2).

[0085] In the hot water only mode, close the A-way valve 13 (such as valves A1 and A2) and only open the B-way valve 13 (such as valves B1 and B2).

[0086] In heating + hot water mode, valves 13 of both A and B are open.

[0087] In the description of this specification, the descriptions with reference to the terms "certain embodiments", "in an example", "exemplarily", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0088] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A relay control device, characterized in that: Applied to an air conditioning system, the air conditioning system includes indoor equipment and outdoor equipment, and the device includes: A main pipeline, used for connecting the outdoor equipment; A plurality of branch pipes, the branch pipes being connected to the main pipe, and the branch pipes being used to connect to the indoor equipment; and A plurality of valves, each branch pipeline is provided with the valve; A controller, wherein the controller comprises a plurality of communication interfaces, wherein the plurality of communication interfaces comprises a first communication interface and a second communication interface, wherein the first communication interface is connected to the outdoor device, and each of the second communication interfaces is communicatively connected to one of the indoor devices.

2. The relay control device according to claim 1, characterized in that: The main pipeline includes a main air pipe and a main liquid pipe, the main air pipe is connected to the air pipe of the outdoor equipment, the main liquid pipe is connected to the liquid pipe of the outdoor equipment, and the branch pipeline includes a bronchial pipe and a branch liquid pipe; One end of the bronchial pipe is connected to the air pipe of the corresponding indoor equipment, and the other end is connected to the main air pipe; one end of the branch liquid pipe is connected to the liquid pipe of the corresponding indoor equipment, and the other end is connected to the main liquid pipe.

3. The relay control device according to claim 1, characterized in that: The communication interface includes at least one of a serial communication interface and a dry node communication interface.

4. The relay control device according to claim 1, characterized in that: The device also includes: A controller, wherein the controller includes a wireless communication module, the outdoor device and each of the indoor devices are assigned different communication addresses, and the controller communicates with any device through the wireless communication module and the communication address, and the any device is the indoor device or the outdoor device.

5. The relay control device according to any one of claims 1 to 4, characterized in that: The controller is used to communicate with the outdoor device and / or the indoor device to control the opening degree of each valve.

6. The relay control device according to claim 5, characterized in that: The communicating with the outdoor device and / or the indoor device to control the opening of each valve includes: When receiving a power-on instruction of any target indoor device, controlling the valve on the branch pipe connected to the target indoor device to open, and sending a first control signal to the outdoor device, so that the outdoor device operates based on the working condition corresponding to the first control signal; When a shutdown instruction of any target indoor device is received, the valve on the branch pipe connected to the target indoor device is controlled to be closed.

7. The relay control device according to claim 6, characterized in that: The branch pipeline includes a bronchial tube and a branch liquid tube, and the bronchial tube and the branch liquid tube are both provided with the valve, and the valve on the branch pipeline connected to the target indoor equipment is controlled to be closed, including: Controlling the valve on the branch liquid pipe connected to the target indoor device to close, the valve on the branch pipe to open, and controlling the outdoor device to operate in a cooling mode for a preset time; When the outdoor device operates in the cooling mode for a preset period of time, the valve on the bronchial pipe is controlled to close.

8. The relay control device according to claim 5, characterized in that: The branch pipeline includes a bronchial tube and a branch liquid tube, and the bronchial tube and the branch liquid tube are both provided with the valve, and the communication with the outdoor equipment and / or the indoor equipment to control the opening of each valve includes: When a temperature reaching instruction indicating that the temperature of any target indoor equipment has reached a set temperature or a refrigerant leakage instruction indicating that the refrigerant has leaked is received, the valve of the bronchus is controlled to be closed.

9. The relay control device according to claim 5, characterized in that: The device further comprises a temperature sensor, which is arranged in the branch pipeline to detect the temperature of the branch pipeline, and the controller is further used for: Based on the temperature of each branch pipeline, the valve opening of each branch pipeline is adjusted to make the temperature of each branch pipeline balanced.

10. The relay control device according to claim 9, characterized in that: The branch pipeline includes a bronchus and a branch liquid pipe, and the bronchus and the branch liquid pipe are both provided with the valve and the temperature sensor. Based on the temperature of each branch pipeline, the valve opening of each branch pipeline is adjusted to make the temperature of each branch pipeline balanced, including: When the air conditioning system is operated in a cooling mode, adjusting the valve opening of each of the bronchial pipes based on the temperature of each of the bronchial pipes so as to balance the temperature of each of the bronchial pipes; When the air conditioning system operates in a heating mode, the valve openings of the branch liquid pipes are adjusted based on the temperatures of the branch liquid pipes of the branch pipelines, so that the temperatures of the branch liquid pipes are balanced.

11. The relay control device according to claim 5, characterized in that: The device further comprises a temperature sensor, which is arranged in the branch pipeline to detect the temperature of the branch pipeline, the branch pipeline comprises a bronchus and a branch liquid pipe, both of which are provided with the valve and the temperature sensor, and the controller is further used for: When the air conditioning system is operated in a cooling mode, determining a superheat degree based on a temperature difference between a temperature of a branch pipe and a temperature of a branch liquid pipe of each branch pipe; Based on the superheat corresponding to the branch pipeline, the opening of the valve of the branch liquid pipe is adjusted so that the superheat is within a preset superheat range.

12. The relay control device according to claim 5, characterized in that: The device further comprises a temperature sensor, which is arranged in the branch pipeline to detect the temperature of the branch pipeline, the branch pipeline comprises a bronchus and a branch liquid pipe, both of which are provided with the valve and the temperature sensor, and the controller is further used for: When the air conditioning system operates in a heating mode, the opening degree of the branch liquid pipe is adjusted based on the temperature of the branch liquid pipe of each branch pipeline and the average temperature of each branch liquid pipe.

13. The relay control device according to any one of claims 6 to 12, characterized in that: The valve on the branch liquid pipe of the branch pipeline is an electronic expansion valve, and the valve on the bronchial pipe of the branch pipeline is an electric ball valve.

14. An air conditioning system, characterized in that: include: Outdoor equipment; Multiple indoor devices; and The relay control device according to any one of claims 1 to 13.

15. The air conditioning system according to claim 14, characterized in that: The indoor equipment includes at least one of an indoor unit and a hydraulic device.

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