An air supply system for pipe galleries that can be used for both dehumidification and ventilation

Abstract

The present invention provides a pipe gallery air supply system that can be used for both dehumidification and ventilation. In the dehumidification mode, the supply air temperature is close to the pipe gallery temperature and finally equal to or slightly higher than the temperature inside the gallery, meeting the normal requirements for dehumidification. Moreover, the entire system has good energy-saving performance. Through modular design, it is widely promoted and applied. It includes a main machine module and N auxiliary machine modules, where N is an integer greater than or equal to 0. The main machine module includes a first outer shell, and each auxiliary machine module includes a corresponding second outer shell. The first outer shell includes a first air inlet and a first air outlet. Each second outer shell includes a second air inlet and a second air outlet. The N auxiliary machine modules are connected in series in sequence. The second air outlet of the front auxiliary machine module is connected to the second air inlet of the rear auxiliary machine module. The second air outlet of the last auxiliary machine module is connected to the first air inlet of the main machine module. The first air outlet of the main machine module blows air into the pipe gallery, and an evaporator is arranged at the area of the inner cavity of the first outer shell facing the first air inlet.

Description

Technical Field

[0001] The present invention relates to the technical field of utility tunnel air supply systems, and specifically to a utility tunnel air supply system that can be used for both dehumidification and ventilation. Background Art

[0002] In the prior art, there are mainly two utility tunnel air supply modes. One is mechanical exhaust and natural air supply, and the other is mechanical air supply and mechanical exhaust. When considering the dehumidification requirement, mechanical air supply and exhaust are more suitable, and the mechanical air supply is realized by the fan of the underground dehumidifier. In the existing utility tunnel air supply system, during the dehumidification season, since the temperature of the underground utility tunnel is lower than the outside air temperature, in the dehumidification mode, the supply air temperature is low, which will further reduce the temperature of the utility tunnel, thus requiring a higher dehumidification requirement, and then a vicious cycle will occur. Summary of the Invention

[0003] Aiming at the above problems, the present invention provides a utility tunnel air supply system that can be used for both dehumidification and ventilation. In the dehumidification mode, the supply air temperature is close to the temperature of the utility tunnel and finally equal to or slightly higher than the temperature inside the tunnel, meeting the normal dehumidification requirement; and the whole system has good energy-saving performance. Through modular design, its popularization and application are extensive.

[0004] A pipe gallery air supply system with both dehumidification and ventilation functions, characterized in that: it includes a main machine module and N auxiliary machine modules, where N is an integer greater than or equal to 0. The main machine module includes a first outer shell, and each auxiliary machine module includes a corresponding second outer shell. The first outer shell includes a first air inlet and a first air outlet. Each second outer shell includes a second air inlet and a second air outlet. The N auxiliary machine modules are connected in series in sequence. The second air outlet of the front auxiliary machine module is connected to the second air inlet of the rear auxiliary machine module, and the second air outlet of the last auxiliary machine module is connected to the first air inlet of the main machine module. The first air outlet of the main machine module blows into the pipe gallery. An evaporator is arranged at the area of the inner cavity of the first outer shell facing the first air inlet. A first water receiving tray is arranged at the bottom of the area of the evaporator. The outlet of the refrigerant pipeline of the evaporator is externally connected to the inlet of the refrigerant pipeline of an external compressor through a connecting pipeline. The compressor is arranged outside the first outer shell. The outlet of the refrigerant pipeline of the compressor is connected to the inlet of the refrigerant pipeline of the second condenser. The outlet of the refrigerant pipeline of the second condenser is connected to the first port of a three-way valve. The second port of the three-way valve is connected to the inlet of the refrigerant pipeline of the first condenser. The outlet of the refrigerant pipeline of the first condenser is connected to the first port of the three-way joint. The third port of the three-way valve is connected to the second port of the three-way joint through a pipeline. The third port of the three-way joint is connected to the inlet of the refrigerant pipeline of the evaporator after passing through an expansion valve. The bottom of the first water receiving tray is connected to an atomizer through a pipeline. The atomizer is arranged above the condensation area of the second condenser. A variable-frequency fan is arranged above the condensation area of the second condenser. The atomizer, the second condenser, and the variable-frequency fan are arranged outside the first outer shell;

[0005] Each auxiliary machine module includes an air-conditioning unit. Each air-conditioning unit includes an indoor unit and an outdoor unit. The indoor unit is arranged at the area of the second outer shell facing the second air inlet. A booster fan is arranged at the air outlet position of the indoor unit. A second water receiving tray is arranged directly below the indoor unit. The outdoor unit is arranged outside the second outer shell. The refrigerant pipeline of the indoor unit is connected to the refrigerant pipeline of the outdoor unit. The air outlet of the booster fan faces the second air outlet.

[0006] It is further characterized in that:

[0007] Electric shutters are provided on one of the panels of the first outer shell and the second outer shell that are not provided with air inlets and air outlets, so that the inner cavity of the shell is ventilated with the pipe gallery when the electric shutters are open, and the inner cavity of the shell is independently and enclosedly arranged with the pipe gallery when the electric shutters are closed;

[0008] The second water receiving trays of the N auxiliary machine modules are sequentially connected through water pipes. The second water receiving tray of the last auxiliary machine module is connected to the first water receiving tray of the main machine module through a water pipe. The height position of the bottom plate of the first water receiving tray is not higher than that of the bottom plate of the second water receiving tray, ensuring that the condensed water in the auxiliary machine module flows into the first water receiving tray in the main machine module;

[0009] A first thermometer is arranged at the air outlet position of the main machine module, and a second thermometer is arranged in the pipe gallery. The first thermometer and the second thermometer are connected to the main control module through data lines. The main control module is connected to the variable frequency fan. The main control module compares the magnitudes of T1 and T2 according to T1 feedback by the first thermometer and T2 feedback by the second thermometer, and then controls the air volume of the variable frequency fan, so as to adjust the condensation rate of the condensation water mist of the atomizer on the second condenser, thereby adjusting the temperature of the refrigerant passing through the second condenser, adjusting the temperature of the refrigerant entering the first condenser, and then completing the adjustment of the temperature of the air discharged from the air outlet of the main machine module. Finally, the supply air temperature of the main machine module in the dehumidification mode is close to the temperature of the pipe gallery, and finally equal to or slightly higher than the temperature in the gallery. The control module maintains the power state of the variable frequency fan at this time;

[0010] The first air inlet and the first air outlet of the first housing are arranged in the same direction along the length direction of the pipe gallery, and the second air inlet and the second air outlet of the second housing are arranged in the same direction along the length direction of the pipe gallery;

[0011] The evaporator is arranged vertically, the first condenser is arranged vertically, a fixed frequency fan is arranged at the position between the evaporator and the first condenser, and the second condenser is arranged horizontally, ensuring that the contact area between each structure in the main machine module and air is maximized and guaranteeing the working efficiency.

[0012] After adopting the above technical solutions, the number of auxiliary machines is selected according to the load requirements and connected in series. The air outlet and the air supply port of adjacent modules are connected and arranged. The corresponding modules are started in sequence according to the size of the dehumidification load for hierarchical adjustment. The function of the auxiliary machine module is dehumidification and cooling, and the variable frequency fan of the main machine module realizes hierarchical adjustment of the exhaust air temperature; its supply air temperature in the dehumidification mode is close to the temperature of the pipe gallery, and finally equal to or slightly higher than the temperature in the gallery, meeting the normal requirements of dehumidification; and the whole system has good energy-saving performance. Through modular design, its popularization and application are extensive. Description of the Drawings

[0013] Figure 1 It is a schematic principle block diagram of the connection structure of the present invention;

[0014] Figure 2 It is a schematic block diagram of the main machine module of the present invention;

[0015] Figure 3 Schematic block diagram of the auxiliary machine module of the present invention;

[0016] The names corresponding to the serial numbers in the figure are as follows:

[0017] Main machine module 1, auxiliary machine module 2, first outer shell 3, second outer shell 4, first air inlet 5, first air outlet 6, second air inlet 7, second air outlet 8, evaporator 9, first water receiving tray 10, compressor 11, second condenser 12, three-way valve 13, first condenser 14, three-way joint 15, expansion valve 16, atomizer 17, variable frequency blower 18, indoor unit 19, outdoor unit 20, booster blower 21, second water receiving tray 22, electric louver 23, fixed frequency blower 24. Specific embodiments

[0018] A pipe gallery air supply system for both dehumidification and ventilation, as shown in Figures 1 - 3 : It includes a main machine module 1 and N auxiliary machine modules 2, where N is an integer greater than or equal to 0. The main machine module 1 includes a first outer shell 3, and each auxiliary machine module 2 includes a corresponding second outer shell 4. The first outer shell 3 includes a first air inlet 5 and a first air outlet 6. Each second outer shell 4 includes a second air inlet 7 and a second air outlet 8. The N auxiliary machine modules 2 are connected in series in sequence. The second air outlet 8 of the front auxiliary machine module 2 is connected to the second air inlet 7 of the rear auxiliary machine module 2. The second air outlet 8 of the last auxiliary machine module 2 is connected to the first air inlet 5 of the main machine module 1. The first air outlet 6 of the main machine module 1 blows into the pipe gallery. An evaporator 9 is arranged at the area of the inner cavity of the first outer shell 3 facing the first air inlet 5. A first water receiving tray 10 is arranged at the bottom of the area of the evaporator 9. The outlet of the refrigerant pipeline of the evaporator 9 is externally connected to the inlet of the refrigerant pipeline of an external compressor 11 through a connecting pipeline. The compressor 11 is arranged outside the first outer shell 3. The outlet of the refrigerant pipeline of the compressor 11 is connected to the inlet of the refrigerant pipeline of the second condenser 12. The outlet of the refrigerant pipeline of the second condenser 12 is connected to the first port of a three-way valve 13. The second port of the three-way valve 13 is connected to the inlet of the refrigerant pipeline of the first condenser 14. The outlet of the refrigerant pipeline of the first condenser 14 is connected to the first port of a three-way joint 15. The third port of the three-way valve 13 is connected to the second port of the three-way joint 15 through a pipeline. The third port of the three-way joint 15 is connected to the inlet of the refrigerant pipeline of the evaporator 9 through a pipeline after being connected to an expansion valve 16. The bottom of the first water receiving tray 10 is connected to an atomizer 17 through a pipeline. The atomizer 17 is arranged above the condensation area of the second condenser 12. A variable frequency blower 18 is arranged above the condensation area of the second condenser 12. The atomizer 17, the second condenser 12, and the variable frequency blower 18 are arranged outside the first outer shell 3;

[0019] Each auxiliary module 2 includes an air conditioning unit, and each air conditioning unit includes an indoor unit 19 and an outdoor unit 20. The indoor unit 19 is arranged in the area of the second housing 4 facing the second air inlet 7. A booster fan 21 is arranged at the air outlet position of the indoor unit 19. A second water receiving tray 22 is arranged directly below the indoor unit 19. The outdoor unit 20 is arranged outside the second housing 4. The refrigerant pipeline of the indoor unit 19 is connected to the refrigerant pipeline of the outdoor unit 20. The air outlet of the booster fan 21 is arranged facing the second air outlet 8.

[0020] An electric louver 23 is provided on one of the panels of the first housing 3 and the second housing 4 where there are no air inlets and air outlets arranged. It enables the inner cavity of the housing to be ventilated with the pipe gallery when the electric louver 23 is opened, and the inner cavity of the housing to be independently enclosed and arranged with the pipe gallery when the electric louver 23 is closed;

[0021] The second water receiving trays 22 of the N auxiliary modules 2 are connected in series through water pipes. The second water receiving tray 22 of the last auxiliary module 2 is connected to the first water receiving tray 10 of the main machine module 1 through a water pipe. The bottom height position of the first water receiving tray 10 is not higher than the bottom height position of the second water receiving tray 22, ensuring that the condensed water in the auxiliary module 2 flows into the first water receiving tray 10 in the main machine module 1;

[0022] A first thermometer is arranged at the first air outlet position of the main machine module 1, and a second thermometer is arranged in the pipe gallery. The first thermometer and the second thermometer are connected to the main control module through data lines. The main control module is connected to the variable frequency fan 18. The main control module compares the magnitudes of T1 and T2 according to the feedback T1 of the first thermometer and the feedback T2 of the second thermometer, and then controls the air volume of the variable frequency fan 18, so as to adjust the condensation rate of the condensation water mist of the atomizer 17 on the second condenser 12, thereby adjusting the temperature of the refrigerant passing through the second condenser 12, adjusting the temperature of the refrigerant entering the first condenser 14, and thus completing the temperature adjustment of the air discharged from the first air outlet 6 of the main machine module 1. Finally, the supply air temperature of the main machine module 1 in the dehumidification mode is close to the pipe gallery temperature, and finally equal to or slightly higher than the temperature in the gallery. The control module maintains the power state of the variable frequency fan at this time;

[0023] The first air inlet 5 and the first air outlet 6 of the first housing 3 are arranged in the same direction along the length direction of the pipe gallery. The second air inlet 7 and the second air outlet 8 of the second housing 4 are arranged in the same direction along the length direction of the pipe gallery;

[0024] The evaporator 9 is arranged vertically, the first condenser 14 is arranged vertically, a fixed frequency fan 24 is arranged between the evaporator 9 and the first condenser 14, and the second condenser 12 is arranged horizontally, ensuring that the contact area between each structure in the main machine module 1 and the air is maximized to guarantee the working efficiency.

[0025] The fixed-frequency fan 24 is designed according to the required air supply volume. The variable-frequency fan 18 sends the condensed water atomized by the atomizer 17 to the second condenser 12 to achieve evaporative cooling.

[0026] The refrigerant cycle in the main unit module 1 includes two modes, which are selected according to the temperature requirement:

[0027] A Strong mode: The refrigerant turns into steam through the evaporator 9, is compressed by the compressor 11, sent to the second condenser 12, takes away part of the heat, then reaches the first condenser 14 through the three-way valve 13 for cooling, and then enters the evaporator 9 after reducing the temperature and pressure through the expansion valve 16 to complete the cycle.

[0028] B Bypass mode: The refrigerant turns into steam through the evaporator 9, is compressed by the compressor 11, sent to the second condenser 12, takes away part of the heat, then directly reaches the three-way valve 15 through the three-way valve 13, and then enters the evaporator 9 after reducing the temperature and pressure through the expansion valve 16 to complete the cycle.

[0029] The working modes of the main unit module are as follows

[0030] A Dehumidification mode: The electric louver 23 is closed, the fixed-frequency fan 24 is turned on, the variable-frequency fan 18 is turned on, and the atomizer 17 is turned on when there is condensed water in the first water receiving tray 10. Air enters from the air inlet, condenses water and is cooled through the evaporator 9, then is sent to the first condenser 14 by the fixed-frequency fan 24, and then to the corridor. The function of the second condenser 12 is to discharge the latent heat and a small part of the sensible heat in the evaporator 9, and the function of the first condenser 14 is to recover the sensible heat in the evaporator 9. By indirectly adjusting the outlet air temperature T1 of the first condenser 14 through the variable-frequency fan 18, it is made equal to or slightly higher than the corridor temperature T2

[0031] B Unpowered ventilation mode: Open the electric louver 23, turn off the compressor 11 and all fans, and at this time, it is used as natural intake air in cooperation with the pipe gallery exhaust fan.

[0032] C Powered ventilation mode: Close the electric louver 23, turn off the compressor 11, the variable-frequency fan 18 and the atomizer 17, and only keep the fixed-frequency fan 24 turned on for mechanical air supply.

[0033] Each booster fan 21 in the auxiliary unit module 2 only needs to provide the pressure to overcome the air resistance of its own module under the designed air volume. In the working mode of the auxiliary unit module 2: the electric louver 23 is closed, and the indoor unit 19, the outdoor unit 20, and the booster fan 21 are all started.

[0034] When the auxiliary unit module 2 stops or the main unit module is in the bypass mode: Open the electric louver 23, and the indoor unit 19, the outdoor unit 20, and the booster fan 21 are all shut down.

[0035] When the main host module 1 is connected to at least one auxiliary host module 2: Select the number of auxiliary host modules according to the load requirement, connect them in series, connect the air exhaust port and the air supply port, and also connect the water receiving trays through water pipes. Start the auxiliary host modules and the corresponding main host modules in sequence according to the magnitude of the dehumidification load for hierarchical regulation. The function of the auxiliary host module is dehumidification and cooling, and the main host module realizes hierarchical regulation of the exhaust air temperature and humidity.

[0036] Its working principle is as follows: Select the number of auxiliary hosts according to the load requirement, connect them in series, arrange the air exhaust port and the air supply port of adjacent modules to be connected, start the corresponding modules in sequence according to the magnitude of the dehumidification load for hierarchical regulation. The function of the auxiliary host module is dehumidification and cooling, and the variable-frequency fan of the main host module realizes hierarchical regulation of the exhaust air temperature; its supply air temperature is close to the temperature of the pipe gallery in the dehumidification mode and finally equals or is slightly higher than the temperature in the gallery, meeting the normal requirements of dehumidification; and the entire system has good energy-saving performance, and through modular design, it is widely promoted and applied.

[0037] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0038] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pipe gallery air supply system for both dehumidification and ventilation, characterized in that: It includes a host module and N slave modules, where N is an integer greater than or equal to 0. The host module includes a first outer shell, and each slave module includes a corresponding second outer shell. The first outer shell includes a first air inlet and a first air outlet. Each second outer shell includes a second air inlet and a second air outlet. The N slave modules are connected in series in sequence. The second air outlet of the front slave module is connected to the second air inlet of the rear slave module, and the second air outlet of the last slave module is connected to the first air inlet of the host module. The first air outlet of the host module blows into the pipe gallery. An evaporator is arranged at the area of the inner cavity of the first outer shell facing the first air inlet. A first water receiving tray is arranged at the bottom of the area of the evaporator. The outlet of the refrigerant pipeline of the evaporator is externally connected to the inlet of the refrigerant pipeline of an external compressor through a connecting pipeline. The compressor is arranged outside the first outer shell. The outlet of the refrigerant pipeline of the compressor is connected to the inlet of the refrigerant pipeline of a second condenser. The outlet of the refrigerant pipeline of the second condenser is connected to the first port of a three-way valve. The second port of the three-way valve is connected to the inlet of the refrigerant pipeline of a first condenser. The outlet of the refrigerant pipeline of the first condenser is connected to the first port of a three-way joint. The third port of the three-way valve is connected to the second port of the three-way joint through a pipeline. The third port of the three-way joint is connected to the inlet of the refrigerant pipeline of the evaporator after passing through an expansion valve. The bottom of the first water receiving tray is connected to an atomizer through a pipeline. The atomizer is arranged above the condensation area of the second condenser. A variable-frequency fan is arranged above the condensation area of the second condenser. The atomizer, the second condenser, and the variable-frequency fan are arranged outside the first outer shell; Each slave module includes an air-conditioning unit. Each air-conditioning unit includes an indoor unit and an outdoor unit. The indoor unit is arranged at the area of the second outer shell facing the second air inlet. A booster fan is arranged at the air outlet position of the indoor unit. A second water receiving tray is arranged directly below the indoor unit. The outdoor unit is arranged outside the second outer shell. The refrigerant pipeline of the indoor unit is connected to the refrigerant pipeline of the outdoor unit. The air outlet of the booster fan is arranged facing the second air outlet; Electric louvers are provided on one of the panels of the first outer shell and the second outer shell where no air inlets and air outlets are arranged. The inner cavity of the shell is ventilated with the pipe gallery when the electric louvers are open, and the inner cavity of the shell is arranged independently and enclosed from the pipe gallery when the electric louvers are closed; A first thermometer is arranged at the air outlet position of the host module, a second thermometer is arranged in the pipe gallery, the first thermometer and the second thermometer are connected to the main control module through data lines, the main control module is connected to the variable-frequency fan, the main control module compares the magnitudes of T1 fed back by the first thermometer and T2 fed back by the second thermometer, and then controls the air volume of the variable-frequency fan, so as to adjust the condensation rate of the condensation water mist of the atomizer on the second condenser, thereby adjusting the temperature of the refrigerant passing through the second condenser, adjusting the temperature of the refrigerant entering the first condenser, and further completing the temperature adjustment of the air discharged from the air outlet of the host module, finally making the air supply temperature of the host module in the dehumidification mode close to the pipe gallery temperature and finally equal to or slightly higher than the temperature in the gallery, and the control module maintains the power state of the variable-frequency fan at this time; The refrigerant cycle in the host module includes two modes, which are selected according to temperature requirements: Powerful mode: The refrigerant becomes steam through the evaporator, is compressed by the compressor, sent to the second condenser, takes away part of the heat, then reaches the first condenser through the three-way valve for cooling, and then enters the evaporator after being cooled and depressurized by the expansion valve to complete the cycle; Bypass mode: The refrigerant becomes steam through the evaporator, is compressed by the compressor, sent to the second condenser, takes away part of the heat, then directly reaches the three-way through the three-way valve, and then enters the evaporator after being cooled and depressurized by the expansion valve to complete the cycle; The working modes of the host module are as follows: Dehumidification mode: The electric louver is closed, the fixed-frequency fan is turned on, the variable-frequency fan is turned on, and the atomizer is turned on when there is condensed water in the first water receiving tray; Power-free ventilation mode: The electric louver is opened, the compressor and all fans are turned off, and at this time, it is used as natural air intake in cooperation with the pipe gallery exhaust fan; Powered ventilation mode: The electric louver is closed, the compressor, the variable-frequency fan and the atomizer are turned off, and only the fixed-frequency fan is kept turned on for mechanical air supply.

2. The pipe gallery air supply system for both dehumidification and ventilation according to claim 1, wherein: The second water receiving trays of N auxiliary modules are sequentially connected through water pipes, and the second water receiving tray of the last auxiliary module is connected to the first water receiving tray of the host module through a water pipe, and the bottom height position of the first water receiving tray is not higher than the bottom height position of the second water receiving tray.

3. The duct gallery air supply system for both dehumidification and ventilation as claimed in claim 1, wherein: The first air inlet and the first air outlet of the first housing are arranged in the same direction along the length direction of the pipe gallery, and the second air inlet and the second air outlet of the second housing are arranged in the same direction along the length direction of the pipe gallery.

4. The pipe gallery air supply system for both dehumidification and ventilation as described in claim 1, characterized in that: The evaporator is arranged vertically, the first condenser is arranged vertically, the fixed-frequency fan is arranged between the evaporator and the first condenser, and the second condenser is arranged horizontally.

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