A function switching module for a moisture storage heat exchanger for rail transit air conditioning

Abstract

The present invention discloses a function switching module for a moisture storage heat exchanger for rail transit air conditioning, comprising: a frame, a servo rotation unit fixedly provided below the frame, a liquid path rotation unit fixedly provided above the frame, a moisture storage heat exchange unit circumferentially connected to the frame, the moisture storage heat exchange unit comprising a mounting frame, a condensing assembly, and an evaporating assembly, the mounting frame being fixedly connected to the servo rotation unit. Through the above-mentioned method, the present invention can drive the moisture storage heat exchange unit to perform a 180° reciprocating rotation through the servo rotation unit, can complete the interchange of the condensation and evaporation functions in a relatively short time, effectively reduce the condensation pressure, reduce the cooling loss caused during the switching process, and achieve an energy-saving effect.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit air conditioning, and in particular to a moisture storage heat exchanger function switching module for rail transit air conditioning. Background Art

[0002] Air conditioning in rail transit vehicles is the second largest electricity consumer after traction power. Taking a six-car subway train as an example, the total annual air conditioning electricity consumption per train is approximately 250,000 to 400,000 kWh (total air conditioning electricity consumption varies significantly with different vehicle types, climate, and passenger volume in different regions). In recent years, subway companies, vehicle manufacturers, and air conditioning suppliers have been forced to seek ways to reduce rail transit vehicle air conditioning energy consumption due to pressure from electricity consumption.

[0003] Currently, the use of air conditioning moisture storage heat exchangers instead of traditional fin-tube heat exchangers can accelerate the absorption of moisture in the wet load and recover it for absorbing condensation heat. However, if only the fin-tube heat exchanger is replaced with a moisture storage heat exchanger, and a multi-duct and multi-damper mechanism is used to interchange the evaporator and condenser, there are disadvantages such as serious cooling loss on the refrigerant side and the air side during the switching process, which leads to relatively low cooling capacity and energy efficiency of the entire refrigeration system. Summary of the Invention

[0004] The main technical problem solved by the present invention is to provide a moisture storage heat exchanger function switching module for rail transit air conditioning, which can effectively realize the rapid switching of evaporation function and condensation function, effectively reduce the condensation pressure, reduce the cooling loss during the switching process, and achieve energy-saving effect.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a moisture storage and heat exchanger function switching module for rail transit air conditioning, including: a frame, a servo rotation unit is fixedly arranged at the bottom of the frame, a liquid path rotation unit is fixedly arranged above the frame, and a moisture storage and heat exchange unit is circumferentially connected to the frame. The moisture storage and heat exchange unit includes a mounting frame, a condensing assembly and an evaporating assembly, and the mounting frame is fixedly connected to the servo rotation unit.

[0006] Preferably, the servo rotation unit includes a rotary drive fixedly connected to the frame, the mounting frame is fixedly connected to the lower end surface of the rotary drive, the rotary drive is connected to a reducer via a rotating shaft, and one end of the reducer is connected to a servo motor.

[0007] Preferably, the liquid circuit rotation unit includes a fixed base fixed above the rotary drive, a liquid circuit rotary valve is arranged above the fixed base, the liquid circuit rotary valve includes a stator fixedly connected to the fixed base, a rotor rotatably arranged at the center of the stator, and a sealing element sleeved on the circumference of the rotor, and the rotor is fixedly connected to the inner rotating surface of the rotary drive.

[0008] Preferably, the rotor is provided with a liquid inlet channel and a liquid outlet channel, and both the liquid inlet channel and the liquid outlet channel extend from the rotor side wall to the bottom of the rotor, and the heights of the liquid inlet channel and the liquid outlet channel are different. The stator is provided with a liquid inlet and a liquid outlet at the liquid inlet channel and the liquid outlet channel corresponding to the rotor side wall, and the liquid inlet and the liquid outlet are respectively connected with a liquid inlet copper tube and a liquid outlet copper tube.

[0009] Preferably, the condensing component and the evaporating component both include several layers of stacked moisture storage heat exchangers, the moisture storage heat exchangers are C-shaped or U-shaped structures, the moisture storage heat exchangers are fixedly connected by splints, and an upper frame is provided above and a lower frame is provided below.

[0010] Preferably, the surface of the moisture storage heat exchanger is coated with a desiccant coating.

[0011] Preferably, the two ends of the condensing component and the evaporating component are connected to each other through a first connecting member and a second connecting member, and the bottom ends of the first connecting member and the second connecting member are fixedly connected to the mounting frame, so that the moisture storage and heat exchange unit constitutes a stable overall structure.

[0012] Preferably, one end of the condensing assembly is connected to a drying filter, the drying filter is connected to an electronic expansion valve through a copper tube, and the electronic expansion valve is connected to the evaporating assembly through a copper tube; the end of the condensing assembly away from the drying filter is connected to the liquid outlet channel of the rotor through a copper tube, and the end of the evaporating assembly away from the electronic expansion valve is connected to the liquid inlet channel of the rotor through a copper tube.

[0013] Preferably, the frame includes a hanging frame, and a first support frame and a second support frame parallel to each other are arranged below the hanging frame along the length direction, a baffle is provided on the first support frame, and brushes are provided at both ends of the first support frame and the second support frame along the length direction.

[0014] Preferably, a locking unit is further provided on the frame, and the locking unit includes a sensor and a driver provided on the frame, and the driver provides power and start / stop signals to the servo motor.

[0015] The beneficial effects of the present invention are:

[0016] The current rail transit air conditioners usually use multiple air ducts and multiple air doors to interchange the evaporator and condenser. During the switching process, the cooling capacity on the refrigerant side and the air side is severely lost, resulting in the disadvantages of low cooling capacity and energy efficiency of the refrigeration system. The present invention uses a servo motor to drive the rotary driver to rotate. The rotary driver drives the moisture storage heat exchange unit to rotate 180 degrees back and forth through the lower rotating surface. It can complete the functional switching of the condensing component and the evaporating component of the moisture storage heat exchange unit in a relatively short time. The rotation speed is fast and the process is stable. It can not only bring the indoor humidity to the outdoors, but also improve the heat exchange effect of the condensing component. And effectively reduce the condensation pressure, reduce the condensation air volume, and achieve the purpose of energy saving; the present invention also uses the inner rotating surface of the rotary driver to drive the rotor of the liquid circuit rotary valve to rotate 180 degrees back and forth, and the stator of the liquid circuit rotary valve is fixed on the fixed base and remains motionless. After the rotor rotates, the liquid inlet pipe and the liquid inlet port are misaligned, and the liquid inlet pipe stops taking in liquid, and the liquid outlet pipe and the liquid outlet port are misaligned, and the liquid outlet pipe stops discharging liquid; the present invention further sends a start and stop signal to the servo motor through the driver on the frame, uses the sensor to sense the stop position of the moisture storage and heat exchange unit, realizes automatic locking, and realizes high-precision rotation of the moisture storage and heat exchange unit;

[0017] The moisture storage heat exchanger function switching module for rail transit air conditioning provided by the present invention effectively realizes the precise switching of the condensing component and the evaporating component, significantly reduces the cooling loss caused during the switching process, and has very good technical practicality and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic cross-sectional structure diagram of the present invention;

[0020] Figure 3 It is a schematic diagram of the frame structure of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the moisture storage and heat exchange unit of the present invention;

[0022] Figure 5 It is a side structural schematic diagram of the present invention;

[0023] Figure 6 It is a schematic structural diagram of the servo rotation unit of the present invention;

[0024] Figure 7 It is a schematic structural diagram of the liquid circuit rotation unit of the present invention;

[0025] Figure 8 1 is a schematic diagram of the cross-sectional structure of the liquid circuit rotary valve of the present invention;

[0026] Figure 9Schematic diagram of the structure of the desiccant coating in the present invention;

[0027] The markings of the components in the accompanying drawings are as follows:

[0028] 1. Frame; 11. Hoisting frame; 12. First support frame; 13. Second support frame; 14. Baffle; 15. Brush;

[0029] 2. Servo rotation unit; 21. Rotary drive; 22. Rotating shaft; 23. Reducer; 24. Servo motor;

[0030] 3. Liquid circuit rotary unit; 31. Fixed base; 32. Liquid circuit rotary valve; 321. Stator; 322. Rotor; 323. Liquid inlet channel; 324. Liquid outlet channel; 325. Liquid inlet; 326. Liquid outlet; 327. Liquid inlet copper tube; 328. Liquid outlet copper tube; 329. Sealing element;

[0031] 4. Moisture storage and heat exchange unit; 41. Mounting frame; 42. Evaporation assembly; 43. Condensation assembly; 44. First connecting member; 45. Second connecting member; 46. Moisture storage and heat exchanger; 47. Upper frame; 48. Lower frame; 49. Clamping plate; 410. Dry filter; 411. Electronic expansion valve; 412. Desiccant coating;

[0032] 5. Locking unit; 51. Sensor; 52. Driver. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0034] like Figure 2 and Figure 3 As shown, an embodiment of the present invention includes: a rack 1, the rack 1 includes a hanging frame 11, and a first support frame 12 and a second support frame 13 are connected and arranged parallel to each other along the length direction below the hanging frame 11. The heat exchanger module is suspended as a whole in the track air-conditioning box through the hanging frame 11. A baffle 14 is provided on the first support frame 12 to prevent air leakage between indoor and outdoor. Brushes 15 are provided at both ends of the first support frame 12 and the second support frame 13 along the length direction. The brushes 15 are made of high-temperature resistant and fire-proof materials to effectively prevent dust and isolate the chamber.

[0035] like Figure 2 and Figure 4As shown, the frame 1 is circumferentially provided with a moisture storage and heat exchange unit 4, which includes a mounting frame 41, and a condensing assembly 43 and an evaporating assembly 42 are fixedly provided on both sides of the mounting frame. The two ends of the condensing assembly 43 and the evaporating assembly 42 are connected as a whole through a first connecting member 44 and a second connecting member 45, and the bottom ends of the first connecting member 44 and the second connecting member 45 are fixedly connected to the mounting frame 41, so that the moisture storage and heat exchange unit 4 constitutes a stable overall structure; the condensing assembly 43 and the evaporating assembly 42 are both stacked layer by layer by a plurality of moisture storage and heat exchangers 46, and are processed into a C or U-shaped structure by a bending machine. This embodiment embodies a C-type, and the condensing assembly 43 and the evaporating assembly 42 are combined into a hexagonal structure to effectively save space; the overlapping moisture storage and heat exchangers 46 are fixedly connected by a splint 49, and an upper frame 47 is provided on the top and a lower frame 48 is provided on the bottom, so that the evaporating assembly 42 forms a stable structure, and the condensing assembly 43 forms a stable structure in the same way.

[0036] like Figure 4 and Figure 9 As shown, the surface of the moisture storage heat exchanger 46 is coated with a desiccant coating 412. The desiccant coating 412 uses silica gel desiccant, which can adsorb moisture in the air when the temperature drops, and desorb the adsorbed moisture when the temperature rises.

[0037] like Figure 4 and Figure 5 As shown, one end of the condensing component 43 is connected to a drying filter 410, and the drying filter 410 is connected to an electronic expansion valve 411 through a copper tube. The electronic expansion valve 411 is connected to the evaporating component 42 through a copper tube. The drying filter 410 absorbs impurities in the refrigerant medium of the condensing component 43 to prevent blockage of the electronic expansion valve 411. The electronic expansion valve 411 adjusts the flow of the refrigerant medium in the copper tube to quickly and accurately control the evaporation pressure and condensation pressure of the air-conditioning system.

[0038] like Figure 2 、 Figure 4 and Figure 6As shown, a servo rotation unit 2 is fixedly provided on the mounting frame 41, and the servo rotation unit 2 includes a rotary driver 21. The upper end face of the rotary driver 21 is fixed on the frame 1, and the lower end face of the rotary driver 21 is a working rotating face. The lower end face is fixedly connected to the mounting frame 41, and the mounting frame 41 is fixedly connected to the condensing component 43 and the evaporating component 42, so that the moisture storage and heat exchange unit 4 is in a suspended hoisting state. A reducer 23 is provided at one end of the rotary driver 21 through a rotating shaft 22, and a servo motor 24 is provided at one end of the reducer 23. The servo motor 24 provides rotational power, and the reducer 23 amplifies torque, and drives the rotary driver 21 to rotate through the rotating shaft 22. The working principle of the rotary driver 21 is conventional technology and will not be repeated here. The lower end face of the rotary driver 21 drives the moisture storage and heat exchange unit 4 to rotate 180° back and forth to realize the switching of the condensing component 43 and the evaporating component 42.

[0039] like Figure 2 、 Figure 7 and Figure 8 As shown, a liquid circuit rotating unit 3 is provided on the frame 1. The liquid circuit rotating unit 3 includes a fixed base 31 fixedly connected to the frame 1. A liquid circuit rotating valve 32 is provided above the fixed base 31. The refrigerant flows in the liquid circuit rotating valve 32. The liquid circuit rotating valve 32 includes a stator 321 fixedly connected to the fixed base, a rotor 322 rotatably arranged at the center of the stator 321, and a sealing element 329 sleeved on the circumference of the rotor 322. The bottom end of the rotor 322 is sleeved on the inner rotating surface of the rotary driver 21. A liquid inlet channel 323 and a liquid outlet channel 324 are provided in the rotor 322. The liquid inlet channel 323 and the liquid outlet channel 324 extend from the side wall of the rotor 322 to the bottom of the rotor 322. The height of the liquid inlet channel 323 is inconsistent with the height of the liquid outlet channel 324. In this embodiment, the height of the liquid inlet channel 323 is lower than the liquid outlet channel 324. A sealing element 329 is provided between the stator 321 and the rotor 322 to prevent the refrigerant in the liquid inlet channel 323 and the liquid outlet channel 324 from cross-flowing during rotation.

[0040] like Figure 5 、 Figure 7 and Figure 8As shown, the bottom end of the liquid inlet channel 323 is connected to the end of the condensing assembly 43 away from the drying filter 410 through a copper tube, and the lower end of the liquid outlet channel 324 is connected to the end of the evaporating assembly 42 away from the electronic expansion valve 411 through a copper tube; a liquid inlet 325 and a liquid outlet 326 are provided at the liquid inlet channel 323 and the liquid outlet channel 324 on the side wall of the stator 321 corresponding to the rotor 322, and the liquid inlet 325 and the liquid outlet 326 are connected by a copper tube adapter and provided with a liquid inlet copper tube 327 and a liquid outlet copper tube 328; the high-temperature and high-pressure refrigerant gas passes through the liquid inlet copper tube 32 7 enters the liquid inlet 325, flows through the liquid inlet channel 323, and is input into the condensing component 43 through the copper tube. After condensation in the condensing component 43, it becomes a medium-temperature and high-pressure refrigerant liquid. The medium-temperature and high-pressure refrigerant liquid is filtered by the drying filter 410 and then throttled by the electronic expansion valve 411. The throttled refrigerant becomes a low-temperature and low-pressure gas-liquid mixture, and then flows into the evaporation component 42 for evaporation. The evaporated refrigerant becomes a low-temperature and low-pressure superheated steam. The superheated steam is input into the liquid outlet channel 324 through the copper tube and is output from the liquid outlet 326 through the liquid outlet copper tube 328.

[0041] like Figure 2 As shown, a locking unit 5 is also provided on the frame 1, and the locking unit 5 includes a sensor 51 and a driver 52 arranged above the frame 1. The driver 52 sends a start signal, and the servo rotation unit 2 starts after receiving the signal, driving the moisture storage and heat exchange unit 4 to start rotating; when the sensor 51 senses that the moisture storage and heat exchange unit 4 rotates to the specified position, it sends a signal to the driver 52, and the driver 52 sends a signal to lock the current state.

[0042] Here's how it works:

[0043] The driver 52 sends a start signal. After receiving the signal, the servo motor 24 drives the reducer 23 to amplify the torque, and drives the rotary driver 21 to rotate through the rotating shaft 22. The rotary driver 21 drives the upper rotor 322 and the lower moisture storage and heat exchange unit 4 to rotate 180° back and forth. The sensor 51 senses that the moisture storage and heat exchange unit 4 rotates 180° and transmits a signal to the driver 52. The driver 52 transmits a signal to the servo motor 24. The servo motor 24 locks the current state and completes the position exchange of the evaporation component 42 and the condensation component 43. At the same time, the liquid inlet 325 is misaligned with the liquid inlet channel 323, and the liquid outlet 326 is misaligned with the liquid outlet channel 324, stopping the inflow and outflow of the refrigerant medium.

[0044] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A function switching module for a moisture storage heat exchanger for rail transit air conditioning, comprising: The rack is characterized in that: a servo rotation unit is fixedly provided below the rack, a liquid path rotation unit is fixedly provided above the rack, a moisture storage and heat exchange unit is circumferentially connected to the rack, the moisture storage and heat exchange unit includes a mounting frame, a condensing assembly and an evaporating assembly, and the mounting frame is fixedly connected to the servo rotation unit; The servo rotation unit includes a rotary driver fixedly connected to the frame, the mounting frame is fixedly connected to the lower end surface of the rotary driver, the rotary driver is connected to a reducer via a rotating shaft, and one end of the reducer is connected to a servo motor; The liquid circuit rotation unit includes a fixed base fixed above the rotary drive, a liquid circuit rotary valve is arranged above the fixed base, and the liquid circuit rotary valve includes a stator fixedly connected to the fixed base, a rotor rotatably arranged at the center of the stator, and a sealing element sleeved on the circumference of the rotor, and the rotor is fixedly connected to the inner rotating surface of the rotary drive; The rotor is provided with a liquid inlet channel and a liquid outlet channel, both of which extend from the rotor sidewall to the bottom of the rotor. The liquid inlet channel and the liquid outlet channel are at different heights. The stator is provided with a liquid inlet and a liquid outlet at the liquid inlet and liquid outlet channels corresponding to the rotor sidewalls. The liquid inlet and the liquid outlet are connected to a liquid inlet copper tube and a liquid outlet copper tube, respectively. The condensing component and the evaporating component both include several layers of stacked moisture storage heat exchangers, which are C-shaped or U-shaped structures. The moisture storage heat exchangers are fixedly connected by splints, with an upper frame provided above and a lower frame provided below.

2. The function switching module of a moisture storage heat exchanger for rail transit air conditioning according to claim 1, characterized in that: The surface of the moisture storage heat exchanger is coated with a desiccant coating.

3. The function switching module of a moisture storage heat exchanger for rail transit air conditioning according to claim 1, characterized in that: The two ends of the condensing component and the evaporating component are connected to each other through a first connecting member and a second connecting member. The bottom ends of the first connecting member and the second connecting member are fixedly connected to the mounting frame, so that the moisture storage and heat exchange unit forms a stable overall structure.

4. The function switching module of a moisture storage heat exchanger for rail transit air conditioning according to claim 1, characterized in that: One end of the condensing assembly is connected to a drying filter, the drying filter is connected to an electronic expansion valve through a copper tube, and the electronic expansion valve is connected to the evaporating assembly through a copper tube; the end of the condensing assembly away from the drying filter is connected to the liquid outlet channel of the rotor through a copper tube, and the end of the evaporating assembly away from the electronic expansion valve is connected to the liquid inlet channel of the rotor through a copper tube.

5. The function switching module of a moisture storage heat exchanger for rail transit air conditioning according to claim 1, characterized in that: The frame includes a hanging frame, and a first supporting frame and a second supporting frame parallel to each other are arranged below the hanging frame along the length direction. A baffle is arranged on the first supporting frame, and brushes are arranged at both ends of the first supporting frame and the second supporting frame along the length direction.

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