A personalized thermal comfort workstation and method with a local air supply control system

Abstract

The present invention discloses a personalized thermal comfort workstation with a localized air supply control system. The workstation includes a workstation body enclosure panel, which encloses a workstation space, and a workstation body desktop installed within the workstation space; the localized air supply control system includes an information collection device and an air conditioning system; the information collection device includes a first infrared thermal imager, a second infrared thermal imager, and a third infrared thermal imager; and the air conditioning system includes a left arm air conditioning system, a chest air conditioning system, a right arm air conditioning system, a back air conditioning system, and a foot air conditioning system. The personalized thermal comfort workstation with a localized air supply control system provided by the present invention can adjust the localized air supply volume of each air conditioning system based on the user's current human body infrared radiation feedback information obtained by the information collection device, thereby maintaining the human body in a thermally balanced and comfortable state at all times during use of the workstation.

Description

Technical Field

[0001] The present invention relates to the fields of human thermal comfort and intelligent temperature control, and in particular to a personalized thermal comfort workstation and method with a local air supply control system. Background Art

[0002] With the continuous improvement of economic levels, people's requirements for indoor environments are also becoming increasingly higher. Thermal comfort at work and school significantly impacts people's efficiency and mood, but the resulting energy consumption has placed a significant burden on the country. Full-space heating and cooling can no longer meet the thermal comfort needs of every worker and student. Localized indoor environmental design offers an effective and flexible approach to addressing this situation. This significantly improves thermal comfort and significantly contributes to increased work efficiency.

[0003] In addition, the existing central air-conditioning air supply systems on the market are not smart enough in terms of individual demand control. Although the indoor temperature environment can be uniformly set and adjusted, if the thermal comfort needs of different users in the same indoor environment are different, the use effect may not meet expectations. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a personalized thermal comfort workstation and method with a local air supply control system to solve the problem that the central air-conditioning air supply system in the existing technology cannot meet the thermal comfort needs of different users in the same indoor environment and the use effect does not meet the expected problem.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve them: a personalized thermal comfort workstation with a local air supply control system, comprising a workstation, wherein the workstation comprises a workstation body enclosure panel, the workstation body enclosure panel encloses to form a workstation space, and a workstation body desktop is installed inside the workstation space.

[0006] The workstation body enclosing plate includes a first enclosing plate, a second enclosing plate, a third enclosing plate and a fourth enclosing plate connected in sequence, and a personnel entrance is provided between the first enclosing plate and the fourth enclosing plate.

[0007] The personalized thermal comfort workstation with a local air supply control system further comprises a local air supply control system, and the local air supply control system comprises an information collection device and an air conditioning system.

[0008] The information collection device includes: a first infrared thermal imager arranged at the top end of the connection between the second enclosing plate and the third enclosing plate and installed towards the side of the workstation body desktop, a second infrared thermal imager arranged at the bottom end of the connection between the second enclosing plate and the third enclosing plate and installed towards the side of the workstation body desktop, and a third infrared thermal imager arranged at the upper part of one end of the first enclosing plate close to the fourth enclosing plate.

[0009] The air-conditioning system includes: a left arm air-conditioning system, a chest air-conditioning system, a right arm air-conditioning system arranged on the workstation main body desktop, a back air-conditioning system arranged at one end of the first enclosing panel close to the fourth enclosing panel, and a foot air-conditioning system arranged at the bottom end of the connection between the second enclosing panel and the third enclosing panel facing the workstation main body desktop.

[0010] The present invention also has the following technical features:

[0011] The station body enclosing plate is generally rectangular, the first enclosing plate and the third enclosing plate are arranged opposite to each other, and the second enclosing plate and the fourth enclosing plate are arranged opposite to each other.

[0012] The workstation main body desktop is generally L-shaped and is arranged on one side of the second enclosing plate and the third enclosing plate.

[0013] A first mounting shell is arranged on the side of the connection between the second enclosing plate and the third enclosing plate facing the workstation body desktop.

[0014] A second installation shell is arranged at one end of the first enclosing plate close to the fourth enclosing plate.

[0015] The first infrared thermal imager is installed on the upper part of the first installation shell, the second infrared thermal imager is installed on the lower part of the first installation shell, and the third infrared thermal imager is installed on the upper part of the second installation shell.

[0016] The first infrared thermal imager is used to monitor the surface temperature of clothing corresponding to the user's chest, the surface temperature of clothing corresponding to the left arm, and the surface temperature of clothing corresponding to the right arm.

[0017] The second infrared thermal imager monitors the surface temperature of the clothing corresponding to the user's feet.

[0018] The third infrared thermal imager is used to monitor the surface temperature of the clothing corresponding to the user's back.

[0019] The left arm air conditioning system, chest air conditioning system, right arm air conditioning system, back air conditioning system and foot air conditioning system respectively include air outlets, micro-meteorological sensors and black ball temperature sensors.

[0020] The third enclosing plate is also equipped with a user interaction device.

[0021] The air outlet is internally provided with an automatic air door and an automatic air door opening control steering gear installed on the automatic air door.

[0022] The information collection device and the user interaction device send the acquired information to the intelligent control terminal, and the intelligent control terminal calculates the automatic damper opening setting value of each air outlet based on the received information collection device and the user interaction device, and sends the automatic damper opening setting value to the automatic damper opening control servo, and the automatic damper opening control servo adjusts the automatic damper opening according to the set value.

[0023] A method for controlling local air supply in a personalized thermal comfort workstation is provided, using the personalized thermal comfort workstation with the local air supply control system, and includes the following steps:

[0024] Step 1: The information collection device collects the clothing surface temperature t fi :

[0025] Step 2: Air conditioning system collects air flow rate v i , temperature t i and black globe temperature tg i :

[0026] Step 3: The user sets the desired temperature t through the user interaction device si :

[0027] Step 4: The intelligent control terminal calculates the air distribution index ADPI at each air conditioning system:

[0028] Step 5: Determine whether the air distribution index ADPI calculated in step 4 is greater than 60%:

[0029] When ADPI>60%, the intelligent control terminal calculates the relative opening value S of the automatic air damper at the air outlet and sends the relative opening value S to the automatic air damper opening control servo. The automatic air damper opening control servo adjusts the opening of the automatic air damper according to the calculated relative opening value S to adjust the air supply flow.

[0030] When ADPI≤60%, the automatic damper is fully opened and air is supplied at full flow. At this time, S is 1.

[0031] The calculation method of the air distribution index ADPI is as follows:

[0032]

[0033] in:

[0034] N: The total number of measurement points in the workstation space, which is the same as the number of air conditioning systems (5) in the workstation space.

[0035] Nθ :The working space meets -1.7℃<ΔET i Number of measurement points <+1.1℃, ΔET i Is the effective temperature difference. Effective temperature difference ΔET i The calculation formula is as follows:

[0036] ΔET t =(t i -ts i )-7.66(v i -0.15)

[0037] in:

[0038] t i : Temperature collected by the micro-meteorological sensor, °C; ts i : desired temperature set by the user through the user interaction device, °C; v i : Micro meteorological sensor collects air flow rate, m / s.

[0039] The calculation process of the relative opening value S of the automatic damper is as follows:

[0040] Step 6.1: Calculate the sensible heat using the formula:

[0041] Q=f cl ×h c ×(t fi -t i )+R

[0042] in:

[0043] f cl =1+1.97+R cl

[0044]

[0045] R = 3.88 × 10 -8 f cl [(273.2+t fi ) 4 -(273.2+t mrt ) 4 ]

[0046]

[0047] Q: Sensible heat, W; f cl : Calculate clothing area factor; R cl :User inputs clothing thermal resistance value, clo;h c : Convective heat transfer coefficient, W / (m 2 ℃); R: radiation heat transfer, W / m 2 ;tmrt : ambient radiation temperature, °C; t fi : The surface temperature of the clothing corresponding to each part of the user monitored by the thermal imager, ℃; t gi : Black globe temperature, ℃.

[0048] Step 6.2: Calculate the air flow rate L of each air outlet using the following formula:

[0049]

[0050] in:

[0051] L: air supply volume of each air outlet, m 3 / h; ρ: air density, kg / m 3 , take 1.2; c: specific heat capacity of air at constant pressure kJ / (kg·K), take 1.01.

[0052] Step 6.3: Calculate the relative opening value S of each automatic damper. The calculation formula is as follows:

[0053]

[0054] in:

[0055] L max : The maximum air supply volume of the automatic damper, take 50; S: The relative opening value of each automatic damper.

[0056] The information collection device collects the clothing surface temperature t fi The first infrared thermal imager obtains the surface temperature t of the clothing corresponding to the user's chest. f1 , clothing surface temperature corresponding to the left arm t f2 The clothing surface temperature corresponding to the right arm is t f3 The third infrared thermal imager is used to monitor the surface temperature of the clothing corresponding to the user's back t f4 The second infrared thermal imager monitors the surface temperature of the clothing corresponding to the user's feet t f5 ;

[0057] The micro-meteorological sensor collects the air flow rate v i , temperature t i :

[0058] The micro-meteorological sensor obtains:

[0059] The air flow rate v1 near the user's chest and the temperature t1 near the user's chest; the air flow rate v2 near the user's left arm and the temperature t2 near the user's left arm; the air flow rate v3 near the user's right arm and the temperature t3 near the user's right arm; the air flow rate v4 near the user's back and the temperature t4 near the user's back; the air flow rate v5 near the user's feet and the temperature t5 near the user's feet.

[0060] The black ball temperature sensor collects the black ball temperature t gi .

[0061] The black ball temperature sensor obtains: the black ball temperature t near the user's chest g1 , the black ball temperature near the user's left arm t g2 , the black ball temperature t near the user's right arm g3 , the black ball temperature near the user's back t g4 , the black ball temperature near the user's feet t g5 .

[0062] The user sets the desired temperature t through the user interaction device si .

[0063] The user sets the local thermal comfort expected temperature t corresponding to the measuring point near the human chest through the user interaction device s1 , the local thermal comfort expected temperature t corresponding to the measuring point near the left arm s2 , the local thermal comfort expected temperature t corresponding to the measuring point near the right arm s3 , the local thermal comfort expected temperature t corresponding to the measuring point near the back s4 , the local thermal comfort expected temperature t corresponding to the measuring point near the foot s5 .

[0064] Compared with the prior art, the present invention has the following technical effects:

[0065] (I) The personalized thermal comfort workstation with a local air supply control system provided by the present invention can obtain feedback information on the user's current human infrared radiation based on the information collection device, adjust the local air supply volume of each air-conditioning system, and keep the human body in a comfortable state of thermal balance at all times during the use of the workstation.

[0066] (II) The present invention sets thermal imaging measurement points at individual workstations corresponding to key physiological areas of the human body, monitors the temperature distribution of key areas in real time, and transmits the user's current dynamic image and thermal image information to an intelligent control terminal. The intelligent control terminal's built-in human posture estimation algorithm outputs the coordinate information of the joint points of the user's body image, and the corresponding thermal image area is used to calculate the average surface temperature of the key areas of the human body. When the temperature at the lowest point of the temperature distribution of a key area is lower than the set value, a signal is fed back to the intelligent control terminal in real time. The local air supply control system controls the HVAC system's air supply device to open the air supply vents corresponding to this area and dynamically adjusts the opening value of the air supply vents to supply warm air at a temperature of 26°C to this area. When the temperature monitored by the thermal imaging measurement points reaches the required temperature, the air supply vents are closed and the HVAC system's air supply device is stopped. This system is designed to provide a personalized thermally comfortable environment in a local space for people working at indoor workstations. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 The overall structure of the present invention is shown in FIG. Figure I .

[0068] Figure 2 The overall structure of the present invention is shown in FIG. Figure II .

[0069] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0070] Figure 4 This is a schematic diagram of the automatic damper structure of the present invention.

[0071] The meaning of each reference numeral in the accompanying drawings:

[0072] 1- Workstation body enclosure panel, 2- Workstation body desktop, 3- Personnel entrance, 4- Information collection device, 5- Air conditioning system, 6- First installation shell, 7- Second installation shell, 8- User interaction device, 9- Automatic air damper, 10- Automatic air damper opening control servo.

[0073] 1-1 the first enclosing board, 1-2 the second enclosing board, 1-3 the third enclosing board, 1-4 the fourth enclosing board.

[0074] 4-1 first infrared thermal imager, 4-2 second infrared thermal imager, 4-3 third infrared thermal imager.

[0075] 5-1 Left arm air conditioning system, 5-2 Chest air conditioning system, 5-3 Right arm air conditioning system, 5-4 Back air conditioning system, 5-5 Foot air conditioning system.

[0076] 5-1-1 air outlet, 5-1-2 micro weather sensor, 5-1-3 black ball temperature sensor.

[0077] The specific contents of the present invention are further explained in detail below with reference to the embodiments. DETAILED DESCRIPTION

[0078] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0079] The terms "upper", "lower", "front", "back", "top", "bottom", etc. used in the present invention to indicate directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. "Inside" and "outside" refer to the inside and outside of the contour of the corresponding component, and the above terms cannot be understood as limiting the present invention.

[0080] In the present invention, unless otherwise specified, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0081] Unless otherwise specified, all components in the present invention are components known in the prior art.

[0082] Example 1:

[0083] Following the above technical solution, Figures 1 to 4 As shown, a personalized thermal comfort workstation with a local air supply control system includes a workstation, wherein the workstation includes a workstation body enclosure panel 1, and the workstation body enclosure panel 1 encloses a workstation space, and a workstation body desktop 2 is installed inside the workstation space.

[0084] The workstation body enclosure panel 1 includes a first enclosure panel 1-1, a second enclosure panel 1-2, a third enclosure panel 1-3 and a fourth enclosure panel 1-4 connected in sequence, and a personnel entrance 3 is provided between the first enclosure panel 1-1 and the fourth enclosure panel 1-4.

[0085] The personalized thermal comfort workstation with a local air supply control system further includes a local air supply control system, and the local air supply control system includes an information collection device 4 and an air conditioning system 5.

[0086] The information collection device 4 includes:

[0087] A first infrared thermal imager 4-1 is arranged at the top end of the connection between the second enclosing panel 1-2 and the third enclosing panel 1-2 and installed towards the work station main body desktop 2, a second infrared thermal imager 4-2 is arranged at the bottom end of the connection between the second enclosing panel 1-2 and the third enclosing panel 1-3 and installed towards the work station main body desktop 2, and a third infrared thermal imager 4-3 is arranged at the upper part of one end of the first enclosing panel 1-1 close to the fourth enclosing panel 1-4.

[0088] The first infrared thermal imager 4 - 1 is used to monitor the surface temperature of clothing corresponding to the user's chest, the surface temperature of clothing corresponding to the left arm, and the surface temperature of clothing corresponding to the right arm.

[0089] The second infrared thermal imager 4-2 monitors the surface temperature of the clothing corresponding to the user's feet.

[0090] The third infrared thermal imager 4-3 is used to monitor the surface temperature of the clothing corresponding to the user's back.

[0091] The air conditioning system 5 includes:

[0092] The left arm air-conditioning system 5-1, the chest air-conditioning system 5-2, the right arm air-conditioning system 5-3 are arranged on the work station main body desktop 2, the back air-conditioning system 5-4 is arranged at one end of the first enclosure panel 1-1 close to the fourth enclosure panel 1-4, and the foot air-conditioning system 5-5 is arranged at the bottom end of the connection between the second enclosure panel 1-2 and the third enclosure panel 1-3 facing the work station main body desktop 2.

[0093] As a preferred embodiment of this invention:

[0094] The station body enclosing plate 1 is generally rectangular, the first enclosing plate 1-1 and the third enclosing plate 1-3 are arranged opposite to each other, and the second enclosing plate 1-2 and the fourth enclosing plate 1-4 are arranged opposite to each other.

[0095] The workstation main body desktop 2 is generally L-shaped and is arranged on one side of the second enclosing panel 1-2 and the third enclosing panel 1-3.

[0096] As a preferred embodiment of this invention:

[0097] A first mounting shell 6 is arranged on the side of the connection between the second enclosing plate 1 - 2 and the third enclosing plate 1 - 3 facing the workstation main body desktop 2 .

[0098] A second mounting shell 7 is arranged at one end of the first enclosing plate 1 - 1 close to the fourth enclosing plate 1 - 4 .

[0099] The first infrared thermal imager 4 - 1 is installed on the upper part of the first installation shell 6 , the second infrared thermal imager 4 - 2 is installed on the lower part of the first installation shell 6 ; the third infrared thermal imager 4 - 3 is installed on the upper part of the second installation shell 7 .

[0100] As a preferred embodiment of this invention:

[0101] The left arm air conditioning system 5-1, chest air conditioning system 5-2, right arm air conditioning system 5-3, back air conditioning system 5-4 and foot air conditioning system 5-5 respectively include an air outlet 5-1-1, a micro-meteorological sensor 5-1-2 and a black ball temperature sensor 5-1-3.

[0102] Five micro-meteorological sensors 5-1-2 are respectively installed on the desktop of the workstation body at ergonomic positions near the user's chest, near the user's left arm, near the user's right arm, near the user's back and near the user's feet, for monitoring the air flow rate and temperature near various parts of the user's body.

[0103] Five black ball temperature sensors 5-1-3 are respectively installed on the desktop of the workstation body at ergonomic positions near the user's chest, left arm, right arm, back and feet, and are used to monitor the black ball temperature near various parts of the user's body.

[0104] The air supply volumes of the five air outlets 5-1-1 are all controlled by the intelligent control terminal, enabling each part to work independently and providing users at indoor workstations with a personalized thermally comfortable environment in a local space.

[0105] In actual use, in order to better monitor the black ball temperature, air flow rate and temperature near the user's feet, the black ball temperature sensor 5-1-3 and the micro-meteorological sensor 5-1-2 can be arranged on the workstation floor near the user's feet.

[0106] The air outlet 5-1-1 is connected to the air supply system at the workstation through an air supply duct.

[0107] As a preferred embodiment of this invention:

[0108] The third enclosing panel 1 - 3 is also provided with a user interaction device 8 .

[0109] The air outlet 5 - 1 - 1 is internally installed with an automatic damper 9 and an automatic damper opening control servo 10 installed on the automatic damper 9 .

[0110] The information collection device 4 and the user interaction device 8 send the acquired information to the intelligent control terminal, and the intelligent control terminal calculates the automatic damper 9 opening setting value of each air outlet 5-1-1 based on the received information collection device 4 and the user interaction device 8, and sends the automatic damper 9 opening setting value to the automatic damper opening control servo 10, and the automatic damper opening control servo 10 adjusts the opening of the automatic damper 9 according to the set value.

[0111] The user interaction device 8 is used to interact with the user and is internally integrated with the intelligent control terminal, which can view the infrared thermal imaging information of the current user's body part and set and modify the desired temperature t si ; The information collection device and the user interaction device send the acquired information to the intelligent control terminal, and the intelligent control terminal calls the local air supply control algorithm according to the received information, calculates the control signal duty cycle parameters of the automatic damper control servo of each air outlet, and uses the control signal duty cycle parameters of each automatic damper control servo as the input parameter of the position PID control algorithm, and then converts the expected output result of the position PID control algorithm into an actual servo control signal, and sends it to the automatic damper control servo of each HVAC system air supply device, and controls the servo to change its own shaft angle according to the received control signal, and adjusts the local air supply volume of the thermal comfort workstation by driving the automatic damper.

[0112] Example 2:

[0113] This embodiment discloses a method for controlling local air supply in a personalized thermal comfort workstation, which is implemented using the personalized thermal comfort workstation with a local air supply control system described in Example 1, and includes the following steps:

[0114] Step 1: The information collection device collects the clothing surface temperature t fi :

[0115] Step 2: Air conditioning system collects air flow rate v i , temperature t i and the black globe temperature t gi :

[0116] Step 3: The user sets the desired temperature t through the user interaction device si :

[0117] Step 4: The intelligent control terminal calculates the air distribution index ADPI at each air conditioning system:

[0118] Step 5: Determine whether the air distribution index ADPI calculated in step 4 is greater than 60%:

[0119] When ADPI>60%, the intelligent control terminal calculates the relative opening value S of the automatic air damper at the air outlet and sends the relative opening value S to the automatic air damper opening control servo. The automatic air damper opening control servo adjusts the opening of the automatic air damper according to the calculated relative opening value S to adjust the air supply flow.

[0120] When ADPI≤60%, the automatic damper is fully opened and air is supplied at full flow. At this time, S is 1.

[0121] As a preferred embodiment of this invention:

[0122] The information collection device collects the clothing surface temperature t fi include:

[0123] The first infrared thermal imager 4-1 obtains the surface temperature t of the clothing corresponding to the user's chest. f1 , clothing surface temperature corresponding to the left arm t f2 The clothing surface temperature corresponding to the right arm is t f3 The third infrared thermal imager 4-3 is used to monitor the surface temperature of the clothing corresponding to the user's back t f4 The second infrared thermal imager 4-2 monitors the surface temperature of the user's foot corresponding to the clothing t f5 .

[0124] The micro-meteorological sensor collects the air flow rate v i , temperature t i .

[0125] The micro-meteorological sensor 5-1-2 obtains:

[0126] The air flow velocity v1 near the user's chest and the temperature t1 near the user's chest.

[0127] The air flow rate v2 near the user's left arm and the temperature t2 near the user's left arm.

[0128] The air flow rate v3 near the user's right arm and the temperature t3 near the user's right arm.

[0129] The air flow rate v4 near the user's back and the temperature t4 near the user's back.

[0130] The air flow rate v5 near the user's feet and the temperature t5 near the user's feet.

[0131] The black ball temperature sensor 5-1-3 collects the black ball temperature t gi include:

[0132] The black ball temperature t near the user's chest g1 , the black ball temperature near the user's left arm tg2 , the black ball temperature t near the user's right arm g3 , the black ball temperature near the user's back t g4 , the black ball temperature near the user's feet t g5 .

[0133] The user sets the desired temperature t through the user interaction device si .

[0134] The user sets the local thermal comfort expected temperature t corresponding to the measuring point near the human chest through the user interaction device s1 , the local thermal comfort expected temperature t corresponding to the measuring point near the left arm s2 , the local thermal comfort expected temperature t corresponding to the measuring point near the right arm s3 , the local thermal comfort expected temperature t corresponding to the measuring point near the back s4 , the local thermal comfort expected temperature t corresponding to the measuring point near the foot s5 .

[0135] As a preferred embodiment of this invention:

[0136] The calculation method of the air distribution index ADPI is as follows:

[0137]

[0138] in:

[0139] N: The total number of measurement points in the workstation space, which is the same as the number of air conditioning systems (5) in the workstation space.

[0140] N θ :The working space meets -1.7℃<ΔET i Number of measurement points <+1.1℃, ΔET i Is the effective temperature difference. Effective temperature difference ΔET i The calculation formula is as follows:

[0141] ΔET i =(t i -ts i )-7.66(v i -0.15)

[0142] in:

[0143] t i : Temperature collected by the micro-meteorological sensor, °C; t si : desired temperature set by the user through the user interaction device, °C; v i : Micro meteorological sensor collects air flow rate, m / s.

[0144] t i: Temperature collected by the micro-meteorological sensor, °C, t1=19.4, t2=19.8, t3=19.7, t4=19.4, t5=18.4.

[0145] t si : The desired temperature set by the user through the user interaction device, ° C, t1 = 21, t2 = 22, t3 = 22, t4 = 21, t5 = 22.

[0146] v i : The micro-meteorological sensor collects air flow rate, m / s, v1=0.1, v2=0.05, v3=0.05, v4=0.1, v5=0.2.

[0147] Calculations revealed that ΔET1 = -1.21, ΔET2 = -1.43, ΔET3 = -1.53, ΔET4 = -1.21, ΔET5 = -3.98, and ADPI = 80%.

[0148] As a preferred embodiment of this invention:

[0149] The calculation process of the relative opening value S of the automatic damper is as follows (taking the calculation process of the relative opening value S of the automatic damper corresponding to the position near the user's feet as an example):

[0150] Step 6.1: Calculate the sensible heat using the formula:

[0151] Q=f cl ×h c ×(t fi -t i )+R

[0152] in:

[0153] f cl =1+1.97+R cl

[0154]

[0155] R = 3.88 × 10 -8 f cl |(273.2+t fi ) 4 -(273.2+t mrt ) 4 ]

[0156]

[0157] Q: Sensible heat, W; f cl : Calculate clothing area factor; R cl :User inputs clothing thermal resistance value, clo, 1; h c: Convective heat transfer coefficient, W / (m 2 ℃); R: radiation heat transfer, W / m 2 ;t mrt : ambient radiation temperature, °C; t fi : The surface temperature of the clothing corresponding to each part of the user monitored by the thermal imager, ℃, 20 (the surface temperature of the clothing corresponding to the user's feet); t gi :Black ball temperature, ℃, 19 (near the user's feet).

[0158] Calculation yields: Q = 42.78; f cl =3.97;h c =4.88; R=11.81; t mrt =19.2.

[0159] Step 6.2: Calculate the air flow rate L of each air outlet using the following formula:

[0160]

[0161] in:

[0162] L: air supply volume of each air outlet, m 3 / h; ρ: air density, kg / m 3 , take 1.2; c: specific heat capacity of air at constant pressure kJ / (kg·K), take 1.01.

[0163] Calculation shows: L = 35.3.

[0164] Step 6.3: Calculate the relative opening value S of each automatic damper. The calculation formula is as follows:

[0165]

[0166] in:

[0167] L max : The maximum air supply volume of the automatic damper, take 50; S: The relative opening value of each automatic damper.

[0168] Calculation shows: S = 0.706.

[0169] In this embodiment, the automatic damper includes an air outlet fan blade. When fully closed, the opening angle α of the air outlet fan blade is 0°. The air outlet fan blade can rotate a maximum of 90° along its longitudinal axis. At this time, the automatic damper is fully open, and the opening angle α of the air outlet fan blade is calculated as follows:

[0170]

[0171] The opening angle α of the air outlet fan blades corresponding to the position near the foot is calculated to be 73°.

[0172] Specifically, the intelligent control terminal calls the local air supply control algorithm according to the received information, calculates the control signal duty cycle parameters of the automatic damper control servo of each air supply outlet, uses the control signal duty cycle parameters of each automatic damper control servo as the input parameter of the position PID control algorithm, and then converts the expected output result of the position PID control algorithm into an actual servo control signal, which is sent to the automatic damper control servo of each air supply device of the HVAC system, and controls the servo to change its own shaft angle according to the received control signal, thereby adjusting the local air supply volume of the thermal comfort workstation by driving the automatic damper.

[0173] Calculate the control signal duty cycle parameter dPWM of each automatic throttle control servo:

[0174]

[0175] The duty cycle parameter of the control signal of the automatic air damper control servo corresponding to the position near the foot is calculated to be dPWM=6.595 (the duty cycle base of the control signal of the servo used is 20).

[0176] Furthermore, the air outlet is increased by calling the position PID control algorithm

[0177] The smoothness of the air supply volume, the duty cycle parameter dPWM of the servo control signal is used as the input parameter of the position PID control, and the expected output result PWM out is calculated as follows:

[0178]

[0179] in:

[0180] K p : Proportional coefficient, take 0.65; K i : Integral coefficient, take 0; K d : differential coefficient, take 0.5; k: number of sampling, k = 1, 2, 3...; e k : Deviation value input at the kth sampling moment; e k-1 : Deviation value input at the k-1th sampling moment.

[0181] What has been described above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be conceived by any technician familiar with the field within the technical scope disclosed by the present invention without creative work are all covered by the scope of protection of the present invention.

Claims

1. A local air supply control method for a personalized thermal comfort workstation, characterized in that: The personalized thermal comfort workstation with a local air supply control system is used, including the following steps: Step 1: The information collection device collects the clothing surface temperature t fi : Step 2: Air conditioning system collects air flow rate v i , temperature t i and the black globe temperature t gi : Step 3: The user sets the desired temperature t through the user interaction device si : Step 4: The intelligent control terminal calculates the air distribution index ADPI at each air conditioning system: Step 5: Determine whether the air distribution index ADPI calculated in step 4 is greater than 60%: When ADPI>60%, the intelligent control terminal calculates the relative opening value S of the automatic air damper at the air outlet and sends the relative opening value S to the automatic air damper opening control servo. The automatic air damper opening control servo adjusts the opening of the automatic air damper according to the calculated relative opening value S to adjust the air flow rate. When ADPI≤60%, the automatic damper is fully opened and air is supplied at full flow. At this time, S is 1; The calculation method of the air distribution index ADPI is as follows: in: N: the total number of measurement points in the workstation space, which is the same as the number of air conditioning systems (5) in the workstation space; N θ :The working space meets -1.7℃<ΔET i Number of measurement points <+1.1℃, ΔET i is the effective temperature difference; Effective temperature difference ΔET i The calculation formula is as follows: ΔET i =(t i -t si )-7.66(v i -0.15) in: t i : Temperature collected by the micro-meteorological sensor, °C; t si : desired temperature set by the user through the user interaction device, °C; v i : Micro-meteorological sensor collects air flow rate, m / s; The calculation process of the relative opening value S of the automatic damper is as follows: Step 6.1: Calculate the sensible heat using the formula: Q=f cl ×h c ×(t fi -t i )+R in: f cl =1+1.97+R cl R=3.88×10 -8 f cl [(273.2+t fi ) 4 -(273.2+t mrt ) 4 ] Q: Sensible heat, W; f cl : Calculate clothing area factor; R cl :User inputs clothing thermal resistance value, clo;h c : Convective heat transfer coefficient, W / (m 2 ℃); R: radiation heat transfer, W / m 2 ;t mrt : ambient radiation temperature, °C; t fi : The surface temperature of the clothing corresponding to each part of the user monitored by the thermal imager, ℃; t gi : globe temperature, °C; Step 6.2: Calculate the air flow rate L of each air outlet using the following formula: in: L: air supply volume of each air outlet, m 3 / h; ρ: air density, kg / m 3 ; c: specific heat capacity of air at constant pressure kJ / (kg·K); Step 6.3: Calculate the relative opening value S of each automatic damper. The calculation formula is as follows: in: L max : The maximum air supply volume of the automatic damper, take 50; S: The relative opening value of the automatic damper.

2. The local air supply control method for a personalized thermal comfort workstation according to claim 1, characterized in that: The personalized thermal comfort workstation with a local air supply control system includes a workstation, wherein the workstation includes a workstation body enclosure panel (1), the workstation body enclosure panel (1) encloses a workstation space, and a workstation body desktop (2) is installed inside the workstation space; The workstation body enclosing plate (1) comprises a first enclosing plate (1-1), a second enclosing plate (1-2), a third enclosing plate (1-3) and a fourth enclosing plate (1-4) connected in sequence, and a personnel entrance (3) is provided between the first enclosing plate (1-1) and the fourth enclosing plate (1-4); The personalized thermal comfort workstation with a local air supply control system further includes a local air supply control system, and the local air supply control system includes an information collection device (4) and an air conditioning system (5); The information collection device includes: A first infrared thermal imager (4-1) is arranged at the top end of the connection between the second enclosing plate (1-2) and the third enclosing plate (1-3) and is installed toward the side of the workstation main body desktop (2); a second infrared thermal imager (4-2) is arranged at the bottom end of the connection between the second enclosing plate (1-2) and the third enclosing plate (1-3) and is installed toward the side of the workstation main body desktop (2); and a third infrared thermal imager (4-3) is arranged at the upper part of one end of the first enclosing plate (1-1) close to the fourth enclosing plate (1-4); The air conditioning system (5) comprises: A left arm air conditioning system (5-1), a chest air conditioning system (5-2), a right arm air conditioning system (5-3) arranged on the workstation main body desktop (2), a back air conditioning system (5-4) arranged at one end of the first enclosing plate (1-1) close to the fourth enclosing plate (1-4), and a foot air conditioning system (5-5) arranged at the bottom end of the connection between the second enclosing plate (1-2) and the third enclosing plate (1-3) facing the workstation main body desktop (2); The left arm air conditioning system (5-1), chest air conditioning system (5-2), right arm air conditioning system (5-3), back air conditioning system (5-4) and foot air conditioning system (5-5) respectively include an air outlet (5-1-1), a micro-meteorological sensor (5-1-2) and a black ball temperature sensor (5-1-3).

3. The local air supply control method for a personalized thermal comfort workstation according to claim 2, characterized in that: The information collection device collects the clothing surface temperature t fi include: The first infrared thermal imager (4-1) obtains the surface temperature of the clothing corresponding to the user's chest t f1 , clothing surface temperature corresponding to the left arm t f2 The clothing surface temperature corresponding to the right arm is t f3 The third infrared thermal imager (4-3) is used to monitor the surface temperature of the clothing corresponding to the user's back t f4 The second infrared thermal imager (4-2) monitors the surface temperature of the clothing corresponding to the user's feet t f5 ; The micro-meteorological sensor collects the air flow rate v i , temperature t i include: Air velocity v1 near the user's chest, and temperature t1 near the user's chest; air velocity v2 near the user's left arm, and temperature t2 near the user's left arm; air velocity v3 near the user's right arm, and temperature t3 near the user's right arm; air velocity v4 near the user's back, and temperature t4 near the user's back; air velocity v5 near the user's feet, and temperature t5 near the user's feet; The black ball temperature sensor (5-1-3) collects the black ball temperature t gi include: The black ball temperature t near the user's chest g1 , the black ball temperature near the user's left arm t g2 , the black ball temperature t near the user's right arm g3 , the black ball temperature near the user's back t g4 , the black ball temperature near the user's feet t g5 ; The user sets the desired temperature t through the user interaction device si : The user sets the local thermal comfort expected temperature t corresponding to the measuring point near the human chest through the user interaction device s1 , the local thermal comfort expected temperature t corresponding to the measuring point near the left arm s2 , the local thermal comfort expected temperature t corresponding to the measuring point near the right arm s3 , the local thermal comfort expected temperature t corresponding to the measuring point near the back s4 , the local thermal comfort expected temperature t corresponding to the measuring point near the foot s5 .

4. The local air supply control method for a personalized thermal comfort workstation according to claim 3, characterized in that: The station body enclosing plate (1) is generally rectangular, the first enclosing plate (1-1) and the third enclosing plate (1-3) are arranged opposite to each other, and the second enclosing plate (1-2) and the fourth enclosing plate (1-4) are arranged opposite to each other. The workstation main body desktop (2) is generally L-shaped and is arranged on one side of the second enclosing plate (1-2) and the third enclosing plate (1-3).

5. The local air supply control method for a personalized thermal comfort workstation according to claim 4, characterized in that: A first mounting shell (6) is arranged on the side of the connection between the second enclosing plate (1-2) and the third enclosing plate (1-3) facing the workstation main body desktop (2); A second mounting shell (7) is arranged at one end of the first enclosing plate (1-1) close to the fourth enclosing plate (1-4); The first infrared thermal imager (4-1) is installed on the upper part of the first installation shell (6), the second infrared thermal imager (4-2) is installed on the lower part of the first installation shell (6); and the third infrared thermal imager (4-3) is installed on the upper part of the second installation shell (7); The first infrared thermal imager (4-1) is used to monitor the surface temperature of the clothing corresponding to the user's chest, the surface temperature of the clothing corresponding to the left arm, and the surface temperature of the clothing corresponding to the right arm; The second infrared thermal imager (4-2) monitors the surface temperature of the clothing corresponding to the user's feet; The third infrared thermal imager (4-3) is used to monitor the surface temperature of the clothing corresponding to the user's back.

6. The local air supply control method for a personalized thermal comfort workstation according to claim 5, characterized in that: The third enclosing plate (1-3) is also provided with a user interaction device (8); The air outlet (5-1-1) is internally installed with an automatic air door (9) and an automatic air door opening control steering gear (10) installed on the automatic air door (9); The information collection device (4) and the user interaction device (8) send the acquired information to the intelligent control terminal. The intelligent control terminal calculates the automatic damper (9) opening setting value of each air outlet (5-1-1) based on the received information. The automatic damper (9) opening setting value is sent to the automatic damper opening control steering gear (10). The automatic damper opening control steering gear (10) adjusts the opening of the automatic damper (9) according to the set value.

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