dhamaSeating Technology

An Ultra Heating fabric is a new generation electrical heating system designed for mobile heating with DC power. It adopts advanced intelligent textile technology. A patented metal-polymer fiber composite conductive yarn is integrated into the fabric. The conductive yarn is delicate and robust. As a result, the heating fabric is superior soft, light, thin, and robust.

A localized heating design is focused on keeping the passenger comfortable by forming a micro-climate around the passenger. It is more energy efficient since the system only needs to heat the person instead of the entire cabin space and thermal mass. It also provides accelerated comfort for the passenger. Additionally, the system adapts to the number of passengers in the car to not purposely condition unoccupied areas.

Heated seats make sitting in a cold car more comfortable. They heat up more quickly than the rest of the vehicle and can keep you warm while you wait for your vehicle to heat up.

1. The heating pad is designed for 12.0v DC power.
2. Power consumption:~31.0 watts.
3. It activates and starts heating if a person sits on it using a pressure sensor.
4. NTC thermistors to protect from overheating.

Features

• Operating voltage: 12V DC
• Instant heating
• Flexible, lightweight, and portable
• Detachable heating pad
• Larger heating area covers the entire bottom seat
• More energy efficient
• Feasible for all ranges of vehicles

Bill Of Materials:

1. Heating Fabric.
2. Wire.
3. Pressure sensor.
4. NTC Thermistor.
5. ON/OFF Switch.
6. 3 mm foam fabric.
7. Taffeta fabric

ClimaCon® is a unique patented technology that allows the user to control its temperatures between 32° F and 140° F at the touch of a button. ClimaCon®’s novel heat exchange design makes heat dissipation extremely efficient while still allowing the unit to be very lightweight and compact. This small, efficient unit can be integrated seamlessly into a vast range of temperature-controlled wearable products with long battery lives and very little added weight. ClimaCon® is the front-runner in the field of temperature-controlled wearables on the following counts:

• High rates of heat dissipation
• Easy and precise controllability of cooling/heating
• Ability to rapidly alternate between cooling and heating (within seconds)
• Long battery lives of products.
• Low added weight
• Small form factor

The heat balance within the human body is a complicated process involving heat diffusion, metabolic heat generation, and heat convection by fluid flow like blood and urine. Heat transfer with biological tissue is mainly by blood perfusion( i.e. the flow of blood permeation through tissues: skin, muscle, fat, bone, and organs from arteries to capillaries and veins).

While driving, the body is put to work generating more heat and thus faster metabolism than in an idle state. Thus, the blood flow helps in spreading the cooling effect throughout the body.

Localized heating and cooling focus on keeping the rider comfortable by forming a micro-climate around the rider. This is more energy efficient. It also provides accelerated comfort for the rider during the cooling down periods of a soaked vehicle.

Dhama Innovations ClimaCon®’s Cooling and Heating Seat technology is a temperature-controlled seating solution for automotive vehicles. The patented technology allows the user to control its temperatures between 32° F and 140° F at the touch of a button. The heat exchange design makes heat dissipation extremely efficient and is lightweight and compact. This small unit can be integrated seamlessly into a vast range of temperature-controlled wearable products with long battery lives and very little added weight. Key Points:

1. High rates of heat dissipation.
2. Easy and precise controllability of cooling/heating.
3. Ability to rapidly alternate between cooling and heating (within seconds).
4. Long battery life of products.
5. Low added weight.
6. Small form factor.

The heat balance within the human body is a complicated process involving heat diffusion, metabolic heat generation, and heat convection by fluid flow like blood and urine. Heat transfer with biological tissue is mainly by blood perfusion( i.e., the flow of blood permeation through tissues: skin, muscle, fat, bone, and organs from arteries to capillaries and veins).

While driving, the body is put to work generating more heat and thus faster metabolism than in an idle state. Thus, the blood flow helps in spreading the cooling effect throughout the body.

Localized heating and cooling focus on keeping the rider comfortable by forming a micro-climate around the rider. This is more energy efficient. It also provides accelerated comfort for the rider during the cooling down periods of a soaked vehicle.

Dhama Cooling and Heating – Passenger vehicle seat

Benefits and Features

1. Instant Cooling/Heating
2. Helps in reducing fatigue
3. Cooling with zero impact on global warming
4. Super silent operation
5. Eliminates searing burns sitting on sun-warmed upholstery
6. Strategically located Cooling/Heating positions for maximum body contact
7. Easy installation
8. Five adjustable level switches for individual comfort
9. Hassle-free maintenance

Technical specifications

Input voltage:                          12 V  DC

Max power consumption :      38 watts

Temperature range:

• Cooling – 16 to 28 deg Celsius
• Heating – 40 to 60 deg Celsius

Protections:

1. Input reverse polarity protection
2. Input short protection
3. Output short protection

Core technology deliverable is Effective, Fuel Efficient Temperature Controlled auto seats. This becomes more important for Commercial Vehicle driver cabins which may not be Air Conditioned in many countries and applications. Also, would be power saving for up-coming electric vehicles.

Electric vehicles have a lower energy storage capacity and HVAC consumes substantial amount of the total energy stored, considerably reducing the vehicle range, which is one of the most important parameters for EV acceptability.

On the contrary, when the vehicle runs without the AC system, the power consumption remains constant along the travelling distance.

The use of AC affects the overall lifespan of the battery as it increases the number of charge and discharge cycles.

Also, the electric car batteries are lithium based and rely on a mix of cobalt, manganese, nickel and graphite and other primary components. Some of these materials are Rare Earth Metals and might face material sourcing issues.

ClimaCon® proprietary patented cooling / heating technology working on the principles of the ‘Peltier Effect’ which allows the user to precisely control its temperature within a wide operating range of 320F (00C) to 1400F (600C) at the touch of a button. It is eco-friendly, exceedingly lightweight and portable. ClimaCon® has been crafted into a futuristic product line fulfilling the demands of the automotive, healthcare, sports market, and pain management segments.

Refer Patented: US 8397518 B1 and US 9272647 B2 for more details.

 

Seat configuration: Rexine upholstery with all around bead and cooling and heating pad of 10 units (6 back rest and 4 Seat base)

The points of maximum pressure were recorded with and without heating pads for persons of 105 kg and 75 kg. There was no significant change in pressure observed on the back rest or the seat base.

The heat balance within the human body is a complicated process involving heat diffusion, metabolic heat generation and heat convection by flow of blood and other fluids. Heat transfer with biological tissue is mainly by blood perfusion( i.e. the flow of blood permeation through tissues: skin, muscle, fat, bone, and organs from arteries to capillaries and veins).

While driving, the back and shoulder muscles are put to work generating more heat and thus have faster metabolism than in an idle state. Thus, the blood flow helps in spreading the cooling effect throughout the body.

Traditional vehicle air conditioning systems condition the entire cabin to a comfortable range of temperature and humidity regardless of the number of passengers in the vehicle. The A/C system is designed to have enough capacity to provide comfort for transient periods when cooling down a soaked car. Similarly, for heating, the entire cabin is typically warmed up to achieve comfort.

Localized heating and cooling, on the other hand, focuses on keeping the passenger comfortable by forming a microclimate around the passenger. This is more energy efficient since the system only needs to cool the person instead of the entire cabin space and cabin thermal mass. It also provides accelerated comfort for the passenger during the cooling down periods of soaked cars. Additionally, the system adapts to the number of passengers in the car to not purposely condition areas that are not occupied.

• While driving, the back and shoulder muscles are put to work generating more heat and thus faster metabolism than in an idle state. The vehicle seat’s resistance to natural heat removal by convection and evaporation adds to further misery.
• While driving, there is no air flow between the Gluteal area and Thighs and the seat. The other parts of the body lose heat with the help of the air stream. By providing cooling in the seat, the sense of discomfort arising due to the temperature difference between the gluteal region and other body parts can be reduced.
• Each body segment weighs differently upon overall body comfort. According to a study, 13% comfort comes from seat base in a car. Another study showed highest thermal discomfort in the Gluteal region.
• Maximum sweat rate is around the back and the forehead and Back comfort has relatively more effect on overall comfort. This section removes heat faster, thus reducing sweat in this area.
• Seat bottoms can become extremely hot during summer. Maximum heat builds up at the Gluteal region as it is in direct contact with the seat. Overall thermal comfort can be improved by cooling the seat base.
• Each body segment weighs differently upon overall body comfort. The back’s comfort has more effect on overall comfort.
• Areas with more pressure block heat exchange and induce more irritation to comfort than other regions. Placing cooling directly here provides instant comfort to the body.
• The Gluteal region and the Thighs bear the maximum pressure on a Seat. Areas with more pressure block heat exchange and induce more irritation to comfort than other regions. Placing cooling directly here provides instant comfort to the body.

Basic Specifications for the Peltier Cooling / Heating Technology Design

Peltier Module Operating voltage: 0.45 to 5.60V

The designed Peltier block can perform better till 5.6v input to each module, if the input voltage increased beyond 6.0v it starts decreasing in cooling performance as the heat sink temperature rises on another side and also its power consumption increases.

Nominal voltage: 3.7V

Current :

a)1.34-1.45A    @ 3.7V

1. b) 0.18-0.19A @0.45V
2. c) 2.10-2.21A @ 5.6V

• AC resistance of module: 1.75 Ohm
• Operation and storage module below 70°C
• Dimensions : 30*30*4.6mm

Specs of the DC fan

• Rated voltage: 12.0V DC.
• Operating voltage: 6-13.8V DC
• Rated Current:-0.040A
• Operating Temperature Range:- (-10 to 70 deg. C)
• RPM:5800
• CFM:7
• Dimensions : 40*40*10mm

Specs of the Aluminum heat sink

Dimensions:- 60*43*9mm and and 34*34*3mm  for through hole

• Flatness: 0.02
• Surface roughness: 0.8
• Alloy: 6063T5

Specs of Aluminum coin

• Dimensions:- Dia 46mm, thickness 0.8mm
• Flatness: 0.02
• Surface roughness: 0.8

Specs of Holding plastic cabinet

• Dimensions:-68*45*23mm
• Material: Polypropylene (PP)

Two-wheelers with 2-peltier units

The 2-Peltier blocks are assembled in seat foam. The seat foam is molded with the female frame as per the designed Cooling/Heating positions. When you use two frames one is  (female)F-frame fig(a) which is integrated in foam and another (male)M-frame fig(b) fixed with a block unit. Both Frames are fixed with provided snap fit or nut and bolt and lock pins as per seat design.

Key Seat Integration Application Considerations:

1. Average area in a seat where human back and base generally touch.
2. Size and shape of seat foam to select the Number of ClimaCon units and their placement /position.
3. Possibilities of inlet & outlet vents.
4. Limitations on input voltage and Power consumption.
5. The Operating sound when installed in the seat Depends on the number of units, each unit has 20.6dB(A)
6. Any specific requirements for the trim cover must be considered.
7. Cover without foam fused.
8. Lesser the thickness the better the perception of cool and heat performance.

Technical specification

• Operating Voltage: 8.0V to 22.0V
• Standard Voltage: 18.0V
• Power consumption at 12.0v : 15watts max
• Fan max operating voltage:13.8V