Armchair with heat regulation system

FIELD: transport.

SUBSTANCE: armchair contains seat and back with breathable upholstery and inner channels and cavities for air supply. Armchair is supplied with air duct and exchange fan installed therein. Armchair is also equipped with thermoelectric device represented by thermoelectric module with heat exchangers installed on its work surfaces. There is also second thermoelectric module in armchair identical to the first one. Said thermoelectric devices are installed respectively inside seat and back, both are equipped with fans intended for distribution of air current in inner channels and cavities of seat and back. Heat exchanger of thermoelectric device located in back, exchange fan and heat exchanger of thermoelectric device located in seat are installed consecutively in air duct along air flow direction.

EFFECT: automatic sustaining of preset cooling temperature difference for seat and back of armchair when common exchange fan is used, and joint simultaneous power feeding control is achieved for identical thermoelectric devices installed inside seat and back.

4 cl, 1 dwg

 

The invention relates to seats with adjustable temperature and may find application in the design of the driver's seat or passenger vehicles, mainly cars.

Comfortable temperature conditions can be achieved by modifying thermal regime of the cabin, for example, the air conditioning inside the cabin. However, this method requires substantial resources and special expensive equipment.

It should be noted that a significant portion of the surface of the body sitting in a chair person is in contact with the surface of the seat, and these body parts are not blown termocondizionatore flow of air circulating in the cabin. This significantly reduces the effect of air-conditioning in the cabin of the vehicle. In hot climates this disadvantage is particularly noticeable. Thermal comfort can be improved by using a chair with a system of thermoregulation. In addition, the cooling (heating) chairs should be significantly faster than cooling the whole cabin, thus, thermoregulation chair allows faster to achieve comfortable conditions.

However, it should be noted that it is possible to achieve relative thermal comfort during the cooling (heating) only seat, not using in the salon air conditioning, as this is tocino above, a significant part of the surface of the body of the sitting person is in contact with the surface of the chairs and the cooling (heating) is enough.

Here and further in the text of the application mentioned formulation is cooled/heated seats, seat, backrest. If there are no other special provisions, in the context of this application it should be understood that it is not so much about the cooling/heating surfaces design chairs that are in contact with the human body, but about the formation of the threads termomodifitsirovannogo air coming from the front surfaces and aimed at being the chair person.

You know the chair is equipped with a system of thermoregulation [Patent DE 10316732, publ 28.10.04]. The seat and backrest is equipped with heating elements located under the steering wheel and providing the contact heating surfaces, two aerators installed under the seat and behind the rear surface of the backrest. Each of the aerators is composed of a thermoelectric element (Peltier element) and a fan. Control of the heat mode is performed by the controller controlling the heating elements and aerators and United with sensors placed under the seat and backrest.

Known seat with climate control (the second embodiment of the system) [Pat the NT US 5626021, publ. 06.05.97, 2]. The seat and backrest is equipped with a system of thermoregulation, each of which has a heat pump that is designed to termocondizionatore air flowing through the internal channels in the cushions of the seat and backrest, as in the heating mode and cooling mode. Each heat pump includes a main heat exchanger mounted on one surface of the module Peltier (thermoelectric module), and the heat exchanger exhaust air, mounted on the other surface of the Peltier module. The air on each main heat exchanger serves the main exchange fan and heat exchanger exhaust air - play, respectively, the extract air fan. Control system power modes (heating/cooling) is represented by two switches (fan switch and temperature switch) and a common controller. The system allows independent control of thermal Ruzimatov back and seat. The main drawbacks of the system climate control due to the need to use two powerful enough exchange fans - separate back and seat. This increases energy consumption, weight and dimensions of the system of thermoregulation and complicates the control system.

As PR is the totype selected another climate control, described in the same source, but which is the third embodiment of the system [patent US 5626021, publ. 06.05.97, 6]. In contrast to the above schemes, the prototype used one on the seat and back, heat pump, and hence:

one Peltier element with two heat exchangers,

- one main exchange fan mounted in the duct,

one fan exhaust air, the exhaust from the respective heat exchanger exhaust air.

In this system, the common duct after the main heat exchanger forks for parallel flow of air in the back and seat. Use one of the exchange fan greatly simplifies the system. However, this solution does not allow independent separate temperature control back and seat, as on the input channels in the backrest and seat is one air temperature from the total exchange of the fan and passing through the total heat exchanger.

In addition, the failure of the fan leads to a simultaneous cessation of cooling (heating) of both elements and backs and seats.

Thus, there is a technical contradiction. On the one hand, the use of two independent refrigeration circuits allows you to adjust the temperature of the seat and backrest, but requires cumbersome and energy is aemkei system of thermoregulation. On the other hand, the use of parallel circuits seat and backrest allows the use of only one heat pump, with the attendant advantages, but does not allow you to selectively adjust the temperature of the seat and backrest.

It should be noted the importance of the latter problem. When operating in the cooling mode based on the conditions of comfort and health indicators seat temperature should be a few degrees above the temperature of the back. Similarly, more comfortable in the heating mode is the condition in which the seat temperature different from the temperature of the back. This is due, primarily, to the fact that when using the seat surface of the seat is made permanent and more intimate contact than with the surface of the backrest.

The basis of the invention the task is to resolve the conflict, namely, to create a chair with a system for thermoregulation of a simplified, robust construction and provides a comfortable environment for the user.

The technical result achieved by the invention, to automatically provide a predetermined temperature difference of the cooling (heating) seat and backrest when using the General exchange fan and joint simultaneous regulation of the power supply is identical to thermoelectric devices installed in the backrest and seat,i.e. the when applying the same voltage to the Peltier elements.

Additional technical result of excluding the possibility of condensation in air ducts and cavities of the seat and backrest.

The problem is solved in that the seat comprises a seat and a backrest with breathable padding with internal channels and cavities of the air supply, and provided with a duct and installed exchange with a fan and fitted with a thermoelectric device is a thermoelectric module with heat exchangers installed on its working surfaces. From the prototype chair differs in that it comes with a second thermoelectric device, identical to the first mentioned thermoelectric device is installed inside the seat and back respectively. Both thermoelectric device is equipped with a fan designed to distribute the air flow in the internal channels and cavities of the seat and backrest. In this heat exchanger, thermoelectric devices, placed in the back, exchange the fan and the heat exchanger, thermoelectric device, placed in the seat, installed in the air duct in series air flow.

Preferably the inlet duct positioned near thermoelectric device, once EDINOGO in the back, the exit of the duct near thermoelectric device placed in the seat, and exchange the fan under the seat between the said thermoelectric devices. Thus, at least part of the duct between the backrest and the seat can be made of flexible material.

An additional result is that the heat exchangers are made in the form of finned heat sinks, thus, for each thermoelectric device, the outer surface of the heat exchanger disposed in the air duct, and the base of the heat exchanger that is installed on the opposite working surface of thermoelectric module, tightly jointly covered by a material having hygroscopic properties.

In more detail, the invention disclosed in the example below, the implementation and illustrated in the present drawing, which schematically presents the claimed design.

The seat back 1 and the seat 2. Coating the outer surface of the backrest and seat are made of suitable material capable of flowing air.

In the seat cushion and backrest made of the cavity 3 and the distribution ducts.

thermoregulation system is composed of thermoelectric device 4 placed in the back (next - first ate) and thermoelectric device 5 placed the second in the seat (hereinafter referred to the second ate). Each thermoelectric device consists of a thermoelectric module 6 module (Peltier) heat exchangers 7 and 8 (hereinafter - the radiators 7, 8) on its both surfaces (surfaces - one heat sink, the other fuel), and also has a fan 9, which is designed to distribute the air flow in the internal channels and cavities of the seat and backrest. For air supply to thermoelectric devices 4, 5 can be used as common duct 10, located in the immediate vicinity of the elements of the armchair and bottom along it. In the preferred implementation, as shown in the drawing, the portion of the duct is located in the rear of the case back, the other part of the duct is under the seat. In the immediate vicinity of the first ate 4 is the entrance 11 of the duct 10.

Each of thermoelectric devices 4, 5 are mounted so that their radiators 7 are located in the duct enabling free passage of air, and the radiator 8 and a fan 9 is oriented in the direction of the cavities and distribution channels respectively back and seat. Both thermoelectric device as much as possible approached to the front surfaces of the seat and backrest. In the lower part of the back of the duct 10 is led outwards and is directly the public under the seat. The output 12 of the duct 10 is located near the second ate. Exchange the fan 13, which feeds air to both ate, located between thermoelectric devices 4, 5 and secured under the seat 2. He is significantly more powerful than the fans 9 ate. When performing chair with adjustable angle of inclination of the back part of the duct may be made of flexible material.

In the above-described chair can be used hpei with radiators of improved design. The improvement consists in the following: the external surface of the finned heat sink 7, is placed in the duct 10, and the base of the heat sink 8, (namely, the portion of the heat sink adjacent to the working surface of thermoelectric module)installed on the opposite working surface of thermoelectric module), covered tightly together by a material having hygroscopic properties.

The temperature control elements of the armchair is as follows.

In "cool" mode and in the seat and in the back of the heat sink is surface of the Peltier module facing to the front surface of the seat, i.e. from the side of the fan 9. Thus, the duct 10 is placed heat exchangers 7 fuel surfaces of the Peltier modules. When running exchange fan 13, the air intake from fat is a and passing through the duct 10, cools the heated heat exchanger 7 first ate 4. When passing through the heat exchanger 7 first ate 4 air is heated, and its temperature becomes higher than the ambient temperature. Thus, the exchange fan 13 takes the already heated air to the heat exchanger 7 heat-generating surface of the Peltier module of the second ate and when they ate identical and the supply voltage is the same, the temperature of the exhaust air from the heat exchanger 8 from the side of the heat-absorbing surface of the Peltier module of the second ate will always 2-3°higher than that of the first ate. In other words, the air is distributed by the fan 9 in the cavity 3 of the backrest will always be colder than the air distributed in the cavities 3 of the seat.

The proposed option of cooling the backrest and/or seat allows you to cool the seat even in emergency mode, i.e. when the failure of the exchange of the fan 13 and the only fan 9. However, the degree of cooling will be less.

It should be noted that the cooling mode is accompanied by condensation of the cooling air on the cooled surfaces.

In the inventive design chairs moisture present in the pressurized air condenses on the heat exchanger 8 (cold) mainly on the outer side of its base and at the edges. Through the hygroscopic material, which he tightly gripped, the lag from the heat exchanger 8 flows (flows) to the hot heat exchanger 7, where it vaporizes. Thus, further increases the comfort as condensed moisture misses cavity and distribution channels chairs.

Increasing comfort can be achieved by using the above-described improvements in the design of heat exchangers.

In the "heat" is the inversion of the mode of operation of the Peltier modules and in the duct 10 are heat exchangers heat-absorbing surface, and therefore, the seat, due to the sequential passage of air through the cold heat exchangers, always heated a few degrees lower than the back, because its heat exchanger 7 is blown with air, colder than the air that is withdrawn from the salon.

In the heating mode exchange the fan 13 can be completely turned off, as for the distribution of warm air in the cavities and canals of the backrest and seat enough fans 9.

The present application is described with some details to achieve clarity and understanding. Specialists in this field when reading the descriptions can understand that there may be some changes in details without going beyond the scope and the accompanying formula.

1. The chair, having in its composition seat and backrest with breathable padding with internal channels and cavities of the air supply, the chair is equipped with a duct and installed the it exchange fan, and also equipped with a thermoelectric device is a thermoelectric module with heat exchangers installed on its working surfaces, characterized in that it comes with a second thermoelectric device, identical to the first mentioned thermoelectric device installed inside the seat and backrest, respectively, and both are equipped with fans, designed for distribution of the air flow in the internal channels and cavities of the seat and backrest, with the heat exchanger, thermoelectric device, placed in the back, exchange the fan and the heat exchanger, thermoelectric device, placed in the seat, installed in the air duct in series air flow.

2. The chair according to claim 1, characterized in that the inlet duct is located near thermoelectric device, placed in the back, the exit of the duct is located near thermoelectric device placed in the seat, and exchange the fan is located under the seat between the said thermoelectric devices.

3. The chair according to claim 1, characterized in that at least part of the duct between the backrest and seat made of flexible material.

4. The chair according to any one of claims 1 to 3, characterized in that the heat exchangers are made in the form of ribbed radiators, with d the I of each thermoelectric device, the external surface of the heat exchanger, placed in the duct, and the base of the heat exchanger that is installed on the opposite working surface of thermoelectric module, tightly jointly covered by a material having hygroscopic properties.



 

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