A heat-insulating exhaust system based on human thermal comfort

Abstract

The invention relates to a heat-insulating exhaust system based on human thermal comfort, comprising: a first duct with a first air inlet and a first air outlet at each end, and a first fan disposed in the first duct; a second duct with a second air inlet and a second air outlet at each end; a heat exchange module connected to the first duct and the second duct; a circle of guide air outlets disposed around the exhaust gas generating portion of the work platform, the guide air outlets being connected to the first air outlet; an exhaust device disposed above the work platform, the exhaust device's outlet located above the guide air outlet; a second fan disposed on top of the exhaust device and connected to the second air inlet; wherein, under the action of the first and second fans, an air curtain ejected from the guide air outlet is absorbed by the exhaust outlet, and the air curtain ejected from the circle of guide air outlets surrounds and forms a negative pressure air zone. The invention improves indoor thermal comfort and reduces energy consumption.

Description

Technical Field

[0001] The invention relates to the field of exhaust technology, and in particular to a heat-insulating exhaust system based on human thermal comfort. Background Art

[0002] Open kitchen exhaust devices, forging, welding workshop workbenches and other places need to use the exhaust system to treat the smoke generated in the space to ensure the working environment of personnel.

[0003] Chinese invention patent publication number CN111189088A discloses a kitchen ventilation system based on negative pressure passive air supply and filtration. The system consists of a fresh air section, an air curtain section, and an exhaust section. The fresh air section consists of a fresh air inlet and a PM2.5 filter. The air curtain section consists of an air supply inlet, an adjustable angle air curtain, a gas stove, and a hot air curtain. The exhaust section consists of an exhaust hood, a one-way stop valve, an exhaust fan, and an exhaust outlet. Fresh air passes through the PM2.5 filter through the fresh air inlet to form clean air, which is then delivered to the room through the air curtain through the air supply inlet. The air temperature can be adjusted by the hot air curtain to meet the thermal comfort requirements of the human body. Smoke and oil smoke are discharged to the outside through the exhaust hood. The present invention helps to discharge harmful smoke to the outside, prevent harmful smoke from entering the room, and the air supply through the air curtain improves indoor air quality, enhances human thermal comfort, and improves the combustion efficiency of the gas stove. It introduces fresh air from the outside through passive filtering air supply and sends the fresh air in through the air outlet, but it has the following problems: passive air supply will intensify the flow of outdoor air or indoor air area to the air negative pressure area, increasing the indoor air load; it is not conducive to indoor air pressure balance, human comfort is poor; and energy consumption is high. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the invention is to overcome the problems in the prior art such as poor indoor air pressure balance, poor human comfort and high energy consumption.

[0005] To solve the above technical problems, the invention provides a heat-insulating exhaust system based on human thermal comfort, comprising:

[0006] a first pipe, having a first air inlet and a first air outlet at both ends thereof, and a first fan disposed in the first pipe;

[0007] The second pipe has a second air inlet and a second air outlet at both ends.

[0008] a heat exchange module connected to the first pipeline and the second pipeline, and performing heat exchange between the gas in the second pipeline and the gas in the first pipeline through the heat exchange module;

[0009] The working platform is provided with an exhaust gas generating portion. A circle of guide air supply ports is provided around the exhaust gas generating portion in the working platform, and the guide air supply ports are connected to the first air outlet;

[0010] An exhaust device is provided above the working platform and is provided with an exhaust port, which is located above the guide air supply port; a second fan is provided on the top of the exhaust device and is connected to the second air inlet;

[0011] Among them, under the action of the first fan and the second fan, the air curtain sprayed out from the guide air supply port is absorbed by the exhaust port, and a circle of air curtain sprayed out from the guide air supply port surrounds and forms a negative pressure air area.

[0012] In one embodiment of the invention, a deflector is provided in the deflector air supply port.

[0013] In one embodiment of the invention, the heat exchange module includes a plurality of spiral heat exchange tubes, a first shell, a second shell, and a heat insulation layer located between the first shell and the second shell; the space enclosed by the first shell and the heat insulation layer is connected to the first pipe, and the space enclosed by the second shell and the heat insulation layer is connected to the second pipe;

[0014] The thermal insulation layer is provided with a plurality of connecting holes, a spiral heat exchange tube is passed through the connecting holes, the bottom end of the spiral heat exchange tube is connected to the first shell, the top end of the spiral heat exchange tube passes through the connecting hole, and a heat exchange plate is provided on the top of the spiral heat exchange tube. The heat exchange plate and the connecting hole are gap-matched, and the two are sealed and fixed by seals and connectors. The outer wall of the spiral heat exchange tube is covered with a sealing layer; the spiral heat exchange tube is filled with phase change material.

[0015] In one embodiment of the invention, the connecting member includes an L-shaped pin, the heat exchange plate is provided with a slide groove for the pin to slide, the pin is provided with an operating portion located on the heat exchange plate, the pin slides in the slide groove until the free end of the pin extends out of the heat exchange plate; the side wall of the connecting hole is provided with a socket, and the free end of the pin is inserted into the socket.

[0016] In one embodiment of the invention, the heat exchange module further includes a temperature difference sensor, a temperature difference alarm device, and a control unit; the temperature difference sensor includes a first detection unit and a second detection unit, the first detection unit and the second detection unit are respectively located in the spiral heat exchange tube and the first pipeline;

[0017] The temperature difference sensor and the temperature difference alarm device are connected with the control unit.

[0018] In one embodiment of the invention, a first check valve is provided on the first duct near the first air inlet.

[0019] In one embodiment of the invention, the first air inlet is provided with a first grille.

[0020] In one embodiment of the invention, a second check valve is provided on the second duct near the second air outlet.

[0021] In one embodiment of the invention, the second air outlet is provided with a second grille.

[0022] In one embodiment of the invention, the first duct includes an air inlet pipe section and an air supply pipe end, the diameter of the air inlet pipe section is larger than the diameter of the air supply pipe end, and the air inlet pipe section and the air supply pipe end are connected by a tapered pipe.

[0023] In one embodiment of the invention, the first pipe is covered with a thermal insulation layer.

[0024] In one embodiment of the invention, the second pipe is covered with a thermal insulation layer.

[0025] The above technical solution of the invention has the following advantages over the prior art:

[0026] The heat-insulating exhaust system based on human thermal comfort described in the invention is provided with a circle of guide air supply outlets around the exhaust gas generating part in the working platform, and pressurized air is conveyed to the guide air supply outlets through the first pipe, so that the guide air supply outlets eject an air curtain, so that the air curtain forms an air curtain wall between the working platform and the exhaust device, and the space inside the air curtain wall is a negative pressure air zone, and the space outside is an indoor air zone. The negative pressure air zone and the indoor air zone are separated by the air curtain wall. Therefore, during the working process, the exhaust device processes the exhaust gas and harmful substances generated by the exhaust gas generating part in the indoor air zone and discharges them through the second pipe. In this process, the indoor air zone will not be affected, disturbed or fluctuated by the partition of the air curtain wall, so as not to affect the airflow in the indoor air zone (the operator is in the indoor air zone), maintain the indoor air pressure balance, reduce the temperature of the space where the operator is located, and thus improve the indoor thermal comfort. Moreover, in the case of air curtain wall partitions, the negative pressure air zone is a relatively closed space, which makes it more conducive for the exhaust device to treat the exhaust gas generating part in this space, helps to quickly and smoothly discharge smoke and exhaust gas with low energy consumption, reduce work costs and improve work efficiency.

[0027] In addition, in this embodiment, a heat exchange module is provided in the middle of the first pipe and the second pipe. The heat exchange module can perform heat exchange on the first pipe and the second pipe, thereby facilitating preheating of the supply air of the first pipe through the second pipe. The preheated supply air is sent into the U-shaped guide air outlet to form an air curtain. On the one hand, this can reduce the temperature difference between the indoor temperature and the air curtain, making the comfort better; on the other hand, it can reduce the temperature difference between the air curtain and the exhaust gas generating part, which is equivalent to preheating the combustion-supporting air, which is beneficial to gas combustion and reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the content of the invention more clearly understood, the invention is further described in detail below based on specific embodiments of the invention and in conjunction with the accompanying drawings, wherein

[0029] Figure 1 It is a schematic diagram of an insulated exhaust system based on human thermal comfort;

[0030] Figure 2 It is an invention Figure 1 A top view of an adiabatic exhaust system based on human thermal comfort;

[0031] Figure 3 It is an invention Figure 1 A schematic diagram of a first duct and a second duct in a heat-insulated exhaust system based on human thermal comfort;

[0032] Figure 4 It is an invention Figure 1 A schematic diagram of the connection between a heat exchange module and a first pipe and a second pipe in a heat-insulating exhaust system based on human thermal comfort;

[0033] Figure 5 It is an invention Figure 1 A schematic structural diagram of a heat exchange module in a heat-insulating exhaust system based on human thermal comfort;

[0034] Figure 6 It is an invention Figure 5 A schematic diagram of the connection between a first shell and a thermal insulation layer in a thermal insulation exhaust system based on human thermal comfort;

[0035] Figure 7 It is an invention Figure 5 A schematic structural diagram of connectors in a heat-insulating exhaust system based on human thermal comfort;

[0036] Figure 8 It is a wind speed cloud diagram at the end of the ventilation system based on CFD simulation calculation of the thermal insulation exhaust system for human thermal comfort;

[0037] Figure 9 It is a wind speed vector diagram at the end of the ventilation system based on CFD simulation calculation of the adiabatic exhaust system for human thermal comfort;

[0038] Figure 10 It is a temperature cloud map of the human body surface calculated based on the CFD simulation of the thermal insulation exhaust system for human thermal comfort;

[0039] Figure 11 It is a cloud map of indoor air temperature distribution in summer based on CFD simulation calculation of thermal insulation exhaust system for human thermal comfort.

[0040] Description of the accompanying drawings: 100, first pipe; 100a, air inlet pipe section; 100b, air supply pipe end; 110, first air inlet; 111, first grille; 120, first air outlet; 130, first fan; 140, tapered pipe; 150, insulation layer;

[0041] 200, second pipe; 210, second air inlet; 220, second air outlet; 221, second check valve; 222, second grille;

[0042] 300, heat exchange module; 310, spiral heat exchange tube; 320, first shell; 330, second shell; 340, thermal insulation layer; 341, communication hole; 350, thermal insulation sheet; 360, connector; 361, latch; 362, slide; 363, operating unit; 364, socket; 370, sealing layer;

[0043] 400, working platform; 410, exhaust gas generating unit; 420, air diversion outlet; 430, deflector;

[0044] 500, exhaust device; 510, exhaust port; 520, second fan;

[0045] 600, air curtain;

[0046] 700, negative pressure air area;

[0047] 800. Indoor air zone. DETAILED DESCRIPTION

[0048] The invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the invention and implement it. However, the embodiments are not intended to limit the invention.

[0049] Reference Figures 1 to 3 As shown, the invention provides a heat-insulating exhaust system based on human thermal comfort, comprising:

[0050] The first pipe 100 has a first air inlet 110 and a first air outlet 120 at both ends, and a first fan 130 is installed in the first pipe 100;

[0051] The second pipe 200 has a second air inlet 210 and a second air outlet 220 at both ends.

[0052] The heat exchange module 300 is connected to the first pipeline 100 and the second pipeline 200, and performs heat exchange between the gas in the second pipeline 200 and the gas in the first pipeline 100 through the heat exchange module 300;

[0053] The working platform 400 is provided with an exhaust gas generating portion 410. A circle of guide air outlets 420 are provided around the exhaust gas generating portion 410 in the working platform 400. The guide air outlets 420 are slit-shaped structures. The guide air outlets 420 are connected to the first air outlet 120.

[0054] The exhaust device 500 is disposed above the work platform 400 and has an exhaust port 510 . The exhaust port 510 is located above the air guide port 420 and directly above the exhaust gas generating portion 410 . A second fan 520 is provided at the top of the exhaust device 500 and is connected to the second air inlet 210 .

[0055] Among them, under the action of the first fan 130 and the second fan 520, the air curtain 600 sprayed out from the guide air supply port 420 is absorbed by the exhaust port 510, and a circle of air curtain 600 sprayed out from the guide air supply port 420 surrounds and forms a negative pressure air zone 700.

[0056] It should be noted that when the present application is in use, outdoor air enters the first duct 100 through the first air inlet 110 under the action of the first fan 130. It is then processed by the heat exchange module 300 and, depending on the operating conditions, is determined whether to heat or cool the air. If heating is required (winter), the heat exchange module 300 is turned on to heat the exhaust air from the second duct 200 with the supply air from the first duct 100, heating the supply air to a higher temperature before flowing to the first air outlet 120. If cooling is required (summer), the heat exchange module 300 is controlled to cool the supply air, and the air is then directly delivered to the first air outlet 120 using power provided by the first fan 130. If heating and cooling are not required during the transition period, the heat exchange module 300 is turned off to directly deliver the supply air to the first air outlet 120.

[0057] The supply airflow is pressurized through the first duct 100 and ejected through the guide air outlet 420, forming a downward-sending and upward-returning wind curtain wall. Because both the guide air outlet 420 and the exhaust outlet 510 are pressurized, a space is formed between the guide air outlet 420 and the exhaust outlet 510 of the exhaust device 500. The interior of this space is separated from the exterior by an air wall (i.e., air curtain 600) composed of a stable airflow (from bottom to top). The interior of this space is a negative pressure air zone 700, and the exterior is an indoor air zone 800. The air curtain 600 separates the negative pressure air zone 700 and the indoor air zone 800. Exhaust gas generated by the exhaust gas generating unit 410 is discharged to the outdoors through the second duct 200 by the second fan 520 of the exhaust device 500.

[0058] In some comparative embodiments, an exhaust device 500 and a duct connected to the exhaust device 500 are provided above the work platform 400. The exhaust device 500 directly draws in waste gas and other harmful substances generated by the waste gas generating unit 410 and discharges them outdoors through the duct. This primarily maintains a negative pressure on the work platform 400, thereby drawing waste gas generating unit 410 into the exhaust device 500. However, this reduces thermal comfort and alters the indoor air pressure balance, potentially adversely affecting production and the health of operators. For example, if production around the work platform 400 generates harmful gases and dust, maintaining a negative pressure on the work platform 400 will also attract these harmful substances, endangering human health and reducing product quality. If a negative pressure condition is maintained in the kitchen for a long period of time, bacteria and VOCs from other rooms, such as the bathroom and living room, will be drawn into the kitchen, causing fluctuations in indoor temperature and wind speed, impacting indoor thermal comfort. Furthermore, locally heated work platforms 400 (such as the kitchen) are not equipped with separate air conditioning, or air conditioning is not provided for operators. This results in convection and radiation of heat to the surrounding space during the heating operation, which has a significant negative effect on the comfort of the operator (cook).

[0059] Specifically, in this embodiment, a circle of guide air outlets 420 are set around the exhaust gas generating part 410 in the working platform 400, and pressurized air is transported to the guide air outlet 420 through the first pipe 100, so that the guide air outlet 420 ejects an air curtain 600, so that the air curtain 600 forms an air curtain 600 wall between the working platform 400 and the exhaust device 500, and the space inside the air curtain 600 wall is a negative pressure air zone 700, and the space outside is an indoor air zone 800, and the negative pressure air zone 700 and the indoor air zone 800 are separated by air. The air curtain 600 wall separates the indoor air zone 800 from the exhaust gas generating unit 410. During operation, the exhaust device 500 processes the exhaust gas and harmful substances generated by the exhaust gas generating unit 410 in the indoor air zone 800 and discharges them through the second duct 200. During this process, the indoor air zone 800 is not affected, disturbed, or fluctuated by the air curtain 600 wall, thereby maintaining the airflow in the indoor air zone 800 (where the operator is located), maintaining indoor air pressure balance, and reducing the temperature of the operator's space, thereby improving indoor thermal comfort. Furthermore, with the air curtain 600 wall separating the indoor air zone 800, the negative pressure air zone 700 is a relatively enclosed space, which is more conducive to the exhaust device 500's processing of the exhaust gas generating unit 410 within this space, facilitating the rapid and energy-efficient discharge of smoke and exhaust gases, reducing work costs and improving work efficiency.

[0060] In addition, in this embodiment, a heat exchange module 300 is provided in the middle of the first pipe 100 and the second pipe 200. The heat exchange module 300 can perform heat exchange on the first pipe 100 and the second pipe 200, thereby facilitating preheating of the supply air of the first pipe 100 through the second pipe 200. The preheated supply air is sent into the U-shaped guide air supply port 420 to form an air curtain 600. On the one hand, this can reduce the temperature difference between the indoor temperature and the air curtain 600, thereby improving comfort; on the other hand, it can reduce the temperature difference between the air curtain 600 and the exhaust gas generating part 410, which is equivalent to preheating the combustion-supporting air, which is beneficial to gas combustion and reduces energy consumption.

[0061] Furthermore, a deflector 430 is provided in the deflector air supply port 420 .

[0062] Specifically, the deflector 430 can change the direction and flow rate of the air curtain 600 ejected from the deflector air outlet 420. Due to the action of the deflector 430, the airflow from the air curtain 600 is laminar and has a high flow rate. Through the suction effect of the upper exhaust device 500, the interaction force with the surrounding air is small, and it will not cause airflow disturbances in the exhaust gas generating unit 410 in the working platform 400 and affect the working process. Thus, an air curtain 600 wall with more stable airflow is formed, further effectively isolating the heat and mass exchange of airflow between the negative pressure air zone 700 and the indoor air zone 800 (for example, the combustion zone and non-combustion zone of a combustion stove), further improving human comfort.

[0063] Furthermore, the heat exchange module 300 includes a plurality of spiral heat exchange tubes 310, a first shell 320, a second shell 330, and a heat insulation layer 340 located between the first shell 320 and the second shell 330. The space enclosed by the first shell 320 and the heat insulation layer 340 is in communication with the first pipeline 100, and the space enclosed by the second shell 330 and the heat insulation layer 340 is in communication with the second pipeline 200.

[0064] The heat exchange module 300 is detachably connected to the first pipe 100 and the second pipe 200 via flanges;

[0065] The thermal insulation layer 340 is provided with a plurality of connecting holes 341, and the plurality of connecting holes 341 are arranged in an array. A spiral heat exchange tube 310 is passed through the connecting hole 341. The bottom end of the spiral heat exchange tube 310 is connected to the first shell 320, and the top of the spiral heat exchange tube 310 passes through the connecting hole 341. An insulation sheet 350 is provided on the top of the spiral heat exchange tube 310. The insulation sheet 350 is gap-matched with the connecting hole, and the two are sealed and fixed by a seal and a connector 360. The outer wall of the spiral heat exchange tube 310 is covered with a sealing layer 370; the spiral heat exchange tube 310 is filled with phase change material.

[0066] The shape, size and thickness of the heat insulating sheet 350 are consistent with those of the communicating hole 341. The material of the heat insulating sheet 350 is the same as that of the heat insulating layer 340.

[0067] Specifically, during summer operation, the thermal insulation sheet 350 at the top of the spiral heat exchange tube 310 is pressed downward, compressing the spiral heat exchange tube 310 below the insulation layer 340. The thermal insulation sheet 350 at the top of the spiral heat exchange tube 310 is flush with the insulation layer 340 and secured to the insulation layer 340 via the connector 360. At this point, the first pipe 100 and the second pipe 200 are isolated and do not exchange heat with each other. The phase change material inside the spiral heat exchange tube 310 releases the stored cold energy into the first pipe 100, thereby pre-cooling the supply air.

[0068] During winter operating conditions, when heat exchange is required between the first pipe 100 and the second pipe 200, opening the connector 360 allows the spiral heat exchange tube 310 to rise above the insulation layer 340 due to its own elastic force, allowing the airflow from the first pipe 100 and the second pipe 200 to exchange heat through the spiral heat exchange tube 310. The seal and sealing layer 370 prevent the airflow from the first pipe 100 and the second pipe 200 from intercommunication. The provision of the sealing layer 370 and the seal prevents the supply air in the first pipe 100 and the exhaust air from the second pipe 200 from mixing at the spiral heat exchange tube 310 and the connecting hole 341, thus maintaining a sealed state throughout the spiral heat exchange tube 310.

[0069] Furthermore, the sealing layer 370 is an aluminum foil corrugated film, the top of which is connected to the heat insulation sheet 350 , and the bottom of which is connected to the connection hole of the heat insulation layer 340 and sealed with the connection hole.

[0070] The provision of the sealing layer 370 and the sealing member can ensure that the supply air in the first pipe 100 and the exhaust air in the second pipe 200 will not mix from the spiral heat exchange tube 310 and the connecting hole 341, so that the entire spiral heat exchange tube 310 is in a sealed state.

[0071] Furthermore, the sealing member is an O-ring, and the O-ring is located in the communicating hole 341 .

[0072] Furthermore, the connecting member 360 includes an L-shaped pin 361, the heat insulation plate 350 is provided with a slide groove 362 for the sliding of the pin 361, the pin 361 is provided with an operating part 363 located on the heat insulation plate 350, and the pin 361 slides in the slide groove 362 until the free end of the pin 361 extends out of the heat insulation plate 350; the side wall of the connecting hole 341 is provided with a socket 364, and the free end of the pin 361 is inserted into the socket 364.

[0073] Furthermore, the heat exchange module 300 further includes a temperature difference sensor, a temperature difference alarm device, and a control unit; the temperature difference sensor includes a first detection unit and a second detection unit, the first detection unit and the second detection unit are respectively located in the spiral heat exchange tube 310 and the first pipeline 100;

[0074] The temperature difference sensor and the temperature difference alarm device are connected with the control unit.

[0075] Specifically, the first detection unit and the second detection unit of the temperature difference sensor respectively detect the temperature of the phase change material in the spiral heat exchange tube 310 and the temperature of the supply air in the first pipe 100. The temperatures of the two are then transmitted to the control unit. The control unit can control the temperature difference alarm device to alarm based on whether the temperature difference between the two exceeds the threshold. For example, when the temperature difference between the phase change material and the supply air temperature approaches 0°C (threshold), the temperature difference alarm device sounds, indicating that the heat exchange between the phase change material and the supply air is nearing completion. At this time, the heat exchange module 300 can be removed and replaced. The replaced heat exchange module 300 is placed in a low-temperature environment to cool, and then installed in the first pipe 100 and the second pipe 200 after cooling.

[0076] Furthermore, a first check valve is provided on the first pipe 100 at a position close to the first air inlet 110 .

[0077] Furthermore, the first air inlet 110 is provided with a first grille 111 .

[0078] Specifically, the first grille 111 rectifies the outdoor air entering the first duct 100 .

[0079] Furthermore, a second check valve 221 is provided on the second pipe 200 at a position close to the second air outlet 220 .

[0080] Specifically, the provision of the second check valve 221 can prevent air backflow caused by high outdoor air pressure.

[0081] Furthermore, the second air outlet 220 is provided with a second grille 222 .

[0082] Specifically, the second grille 222 can prevent foreign matter from entering the exhaust pipe on the one hand, and can adjust the exhaust direction of the second air outlet 220 to prevent the exhausted exhaust gas from being sucked into the first air inlet 110 on the other hand.

[0083] Furthermore, the first duct 100 includes an air inlet section 100a and an air supply section 100b. The diameter of the air inlet section 100a is larger than that of the air supply section 100b. The air inlet section 100a and the air supply section 100b are connected by a tapered tube 140. A first air inlet 110 is located at the free end of the air inlet section 100a, and a first air outlet 120 is located at the free end of the air supply section 100b.

[0084] Specifically, the tapered pipe 140 is provided to increase the air flow velocity, and the high-speed air flow is ejected from the guide air supply port 420 of the working platform 400 to form an air curtain 600 to isolate the flow of the negative pressure air area 700 and the indoor air area 800.

[0085] Furthermore, the first pipe 100 is covered with a thermal insulation layer 150 ; the second pipe 200 is also covered with a thermal insulation layer 150 .

[0086] Specifically, the thermal insulation layer 150 provides thermal insulation for the first pipe 100 and the second pipe 200 .

[0087] Furthermore, the exhaust device 500 is a side suction exhaust fan.

[0088] Specifically, the side suction exhaust fan allows the working platform 400 to have a larger working range, thereby having a wider range of uses.

[0089] Furthermore, the exhaust device 500 is a side suction exhaust fan; in the guide air supply port 420, the pressure of the air curtain 600 ejected from the part close to the operator is greater than the pressure of the air curtain 600 ejected from the part away from the operator.

[0090] Since the exhaust device 500 is a side-suction exhaust fan, the air curtain 600 ejected from the guide air supply outlet 420 on the side away from the operator requires a smaller wind pressure (because it is closer to the bottom of the side-suction exhaust fan), while the air curtain 600 ejected from the guide air supply outlet 420 on the operator side requires a larger wind pressure (because it is far from the bottom of the side-suction exhaust fan, and a larger wind pressure is required to form an effective air curtain 600 between the exhaust outlet 510), thereby further improving efficiency and improving human comfort.

[0091] In some possible implementations, the first air inlet 110 is disposed on a side close to the operator, so that the pressure of the air curtain 600 ejected from the guide air supply outlet 420 close to the operator is higher, and the pressure of the air curtain 600 ejected from the guide air supply outlet 420 far from the operator is lower.

[0092] It should be noted that this application takes the workbench as a kitchen stove as an example, and through CFD simulation calculation, the analysis includes the wind speed cloud diagram at the end of the ventilation system of this device (see Figure 8 ); Wind speed vector diagram at the end of ventilation system (see Figure 9 ); Temperature cloud map of human body surface (see Figure 10 ) and the distribution cloud of indoor air temperature in summer (see Figure 11 ); It can be seen that after the application of this system, the air flow inside the workroom (kitchen) is stable and the temperature distribution is relatively uniform, which meets the requirements of human thermal comfort.

[0093] The exhaust system of the present application can be applied to kitchens, forging or welding workshop workbenches, etc. The above embodiment is described using the kitchen as an example.

[0094] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications derived therefrom remain within the scope of protection of the invention.

Claims

1. A heat-insulating exhaust system based on human thermal comfort, characterized by: include: a first pipe, having a first air inlet and a first air outlet at both ends, and a first fan disposed in the first pipe; a second pipe, having a second air inlet and a second air outlet at both ends thereof; a heat exchange module connected to the first pipeline and the second pipeline, and performing heat exchange between the gas in the second pipeline and the gas in the first pipeline through the heat exchange module; The working platform is provided with an exhaust gas generating portion, wherein a circle of guide air supply ports are provided around the exhaust gas generating portion in the working platform, and the guide air supply ports are connected to the first air outlet; An exhaust device is provided above the working platform, the exhaust device is provided with an exhaust port, and the exhaust port is located above the guide air supply port; a second fan is provided on the top of the exhaust device and is connected to the second air inlet; Wherein, under the action of the first fan and the second fan, the air curtain ejected from the guide air supply port is absorbed by the exhaust port, and a circle of the air curtain ejected from the guide air supply port is surrounded to form a negative pressure air zone; The heat exchange module includes a plurality of spiral heat exchange tubes, a first shell, a second shell, and a heat insulation layer located between the first shell and the second shell; the space enclosed by the first shell and the heat insulation layer is connected to the first pipe, and the space enclosed by the second shell and the heat insulation layer is connected to the second pipe; The heat insulation layer is provided with a plurality of communicating holes, each of which is provided with a spiral heat exchange tube, the bottom end of the spiral heat exchange tube is connected to the first shell, the top end of the spiral heat exchange tube passes through the communicating hole, and a heat exchange fin is provided on the top of the spiral heat exchange tube, the heat exchange fin is loosely matched with the connecting hole, and the two are sealed and fixed by a seal and a connector, the outer wall of the spiral heat exchange tube is covered with a sealing layer; the spiral heat exchange tube is filled with a phase change material; The connecting piece includes an L-shaped pin, the heat exchange plate is provided with a sliding groove for the sliding of the pin, the pin is provided with an operating portion located on the heat exchange plate, the pin slides in the sliding groove until the free end of the pin extends out of the heat exchange plate; the side wall of the connecting hole is provided with a socket, and the free end of the pin is stuck in the socket.

2. The heat-insulating exhaust system based on human thermal comfort according to claim 1 is characterized in that: A flow guide is provided in the flow guide air supply port.

3. The heat-insulating exhaust system based on human thermal comfort according to claim 1 or 2, characterized in that: The heat exchange module further includes a temperature difference sensor, a temperature difference alarm device and a control unit; the temperature difference sensor includes a first detection unit and a second detection unit, the first detection unit and the second detection unit are respectively located in the spiral heat exchange tube and the first pipeline; The temperature difference sensor and the temperature difference alarm device are connected to the control unit.

4. The heat-insulating exhaust system based on human thermal comfort according to claim 1 is characterized in that: A first check valve is provided at a position of the first pipeline close to the first air inlet.

5. The heat-insulating exhaust system based on human thermal comfort according to claim 1 is characterized in that: The first air inlet is provided with a first grille.

6. The heat-insulating exhaust system based on human thermal comfort according to claim 1 is characterized in that: A second check valve is provided at a position of the second pipeline close to the second air outlet.

7. The heat-insulating exhaust system based on human thermal comfort according to claim 1 is characterized in that: The second air outlet is provided with a second grille.

8. The heat-insulating exhaust system based on human thermal comfort according to claim 1 is characterized in that: The first pipe includes an air inlet pipe section and an air supply pipe end. The diameter of the air inlet pipe section is larger than the diameter of the air supply pipe end. The air inlet pipe section and the air supply pipe end are connected by a tapered pipe.

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