CN111397029A

CN111397029A - High-efficiency blowing and temperature-regulating device of portable semiconductor refrigerating sheet

Info

Publication number: CN111397029A
Application number: CN201910638487.9A
Authority: CN
Inventors: 丁建华
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-13
Filing date: 2019-07-13
Publication date: 2020-07-10

Abstract

The invention aims at the problems that in the prior industry, the temperature of the environment is much higher than the normal temperature (mainly high temperature), a proper portable device is needed to blow air to an individual to adjust the temperature so as to improve, however, the current situation that various technologies, including two related new patents using semiconductor refrigerating sheets, are difficult to satisfy indicates various technical problems and specially analyzes that the two patents have problems due to the fact that the inlet air is parallel to the heat exchanger groove, so that the heat exchange efficiency is not reduced, finds a preliminary improvement method and compares the preliminary improvement method with the two patents to obtain preliminary data, proves that the heat exchange efficiency is improved, methods for retrofitting heat exchanger designs to make them more rational and new assembly and fixing methods are proposed and consequently a better general solution and a derived special solution are created, thus, a portable semiconductor refrigerating sheet high-efficiency air-blowing cold-hot temperature adjusting device and a derivative device with the same function and certain particularity are obtained.

Description

High-efficiency blowing and temperature-regulating device of portable semiconductor refrigerating sheet

Technical Field

The invention relates to the special temperature control clothing industry, occasions requiring blowing to efficiently regulate the temperature of human bodies or other objects under extreme temperature environments, and the application of a semiconductor refrigerating sheet (hereinafter referred to as TEC).

Background of the application and State of the Art

At present, in many industries, work is carried out due to environmental temperature exceeding normal temperature (mainly high temperature), such as traffic police, environmental sanitation, fire protection, take-out, express delivery, metallurgy, electric welding, actors, security/military patrol, operation in certain fields (on high-altitude power lines and towers, farmland fields), driving of high-temperature closed spaces (cabs of driving/long-distance trucks, airplanes, ships, pressure containers, tunnels, even tanks and submarines) and maintenance operation under power failure, and a portable or even portable temperature regulating device is needed to be improved. In the related art, the simplest method is to hang a plurality of micro fans on a person, and other methods include water circulation (with a pump and water weight), an ice bag, a phase-change material energy storage bag, a backpack micro air conditioner (with a micro refrigeration compressor and working medium weight), vortex tube refrigeration (with an air compressor and difficult to hang/carry on the body), and the like.

The TEC is used for blowing air to adjust the temperature, so that the temperature can be reduced and increased, the human body can feel the effect of adjusting the temperature by the TEC by means of the wind speed, and other advantages are provided, so that patents appear, wherein the latest application closest to the personal temperature adjustment is CN208048066U (hereinafter referred to as patent 1) and CN208687868U (hereinafter referred to as patent 2). Both

patents

1 and 2 should be of little concern for heating and tempering, and their core parts are several basic components for tempering air and forming air blows with TEC, and both combine the core parts into one box so that they are not independent parts. Patent 1 is draped and patent 2 is portable. Besides the core part, other intelligent control and auxiliary functions in the

patents

1 and 2 are attached to the core part, and the related technologies are mature, so that the design is not difficult. In patent 1 and patent 2, the mutual position of the eddy current fan for air intake (for patent 1)/the axial flow fan (for patent 2, the axial flow fan is simply called as a fan when not confused below) and the heat exchanger (commonly called as a radiator, and herein called as a heat exchanger because the TEC can refrigerate or heat) contained in the heat exchanger are not reasonable due to the old cycle in the shape design of the heat exchanger, and the important heat exchange efficiency is affected (in patent 2, the problems of the multipurpose fan, unsmooth air channel, larger volume and the like exist).

In the application of realizing air blowing temperature regulation by means of the TEC, two sides of the TEC are respectively provided with a heat exchanger (namely two heat exchangers) which are attached to each other. Considering that each side of a TEC can be a cooling or heating side and the other side becomes the opposite heating or cooling side (depending on the direction of current flow), it makes it cumbersome to describe each heat exchanger as a function below. For this reason, one of the two heat exchangers that adjusts the temperature of the air blown in and blows it toward the human body or the target object is called a main heat exchanger, and the other (the air involved blows only toward the atmosphere) is called an auxiliary heat exchanger.

The core of the above problem is because the wind direction of the wind blown by the wind inlet fan (axial flow/vortex) in patent nos. 1 and 2 is parallel to the cooling/heating surface of the main heat exchanger as usual (see later fig. 1 to 2). This has the advantage of reducing the wind resistance to substantially maintain the wind pressure through the main heat exchanger, but has the disadvantage of causing the core indicator of heat exchange efficiency to be greatly affected (to be described later). However, the above-mentioned advantages are offset in patent 2 of the axial flow fan for intake air for the following reasons: an additional air duct formed by a plurality of parts additionally arranged between the main heat exchanger and the final air outlet of the whole box is circuitous and tortuous, so that the total wind resistance is unreasonably increased; while there is also an irrationality in patent 1 of the intake vortex fan: because the air outlet of the fan is smaller than that of the axial flow fan, the cross area of the air inlet section of the fan and the air inlet section of the main heat exchanger is not larger than that of the axial flow fan, so that the heat exchange is influenced, although the fan is more convenient to install and fix on the box shell.

In addition, both

patents

1 and 2 integrate many components in a single box, rather than properly distributing them, making the box bulky and inconvenient to wear around.

Thus, the following independent new devices can be obtained: the same ability to perform blast tempering but which allows to increase the heat exchange efficiency, in other words to save power when tempered to the same temperature, to prolong the battery operating time, and preferably to be more portable and better wearable, should be of great significance and value, since with the new device the blast tempering of TEC is better and more adaptable than the other aforementioned techniques in terms of its current maturity and cost reduction trend with the related batteries, and the use of the blast tempering of TEC is facilitated, for example after making a more optimal special temperature control garment using the device, to facilitate its widespread use in the work of many aforementioned industries, or directly in the device itself for a blast tempering (for example directly replacing the micro portable cooling fans which have been popular).

The battery and the control circuit related to the TEC work can be independent so as to achieve small and flexible size, and the circuit design is mature and not difficult, so that the invention is only limited to a core device for realizing heat exchange/air blowing temperature regulation.

Disclosure of Invention

The

patent

1 and 2 or the conventional method have a serious problem of greatly influencing the core index of the heat exchange efficiency, and the reason is that the air inlet of the heat exchanger is blown along the parallel main heat exchanger grooves, so that the air inlet only passes through the main heat exchanger grooves once, and a large effective contact area with certain impact effect and proper contact time cannot be formed on the surface of the main heat exchanger.

The present invention is directed to a new design for overcoming or improving the above problems, and more particularly to a new design for a main heat exchanger and an auxiliary heat exchanger and a new installation method of an intake fan, so as to optimize the volume of the device, reduce the number of parts, facilitate the assembly, improve the fixing and protection of the TEC, reduce the related cost, and improve the heat exchange efficiency.

In order to achieve the above-mentioned object, the present invention changes the shape of the component a in fig. 1 (the component a and the components B to E mentioned below are explained in the following figures) and thus changes the position of the component C so that the direction of the incoming wind has an impact process with the bottom surface of the component a and a correspondingly improved contact time in order to try to improve the heat exchange efficiency, and for this purpose a basic device (representing the core principle of

patent

1 and 2, see the device 1 shown in fig. 1 to 2) and a preliminarily improved comparison device (i.e. the device 2 shown in fig. 3 to 4) are used for comparison tests. The device 1 is used for replacing the

aforementioned patents

1 and 2 because the air inlet mode and the functional principle of the three parts are the same, but the structure of the air blowing temperature adjusting part is more compact and reasonable, the function is equivalent or even better, and another difference is that the direction of the groove of the part B of the former is changed to be orthogonal to the direction of the groove of the part A in the former by more 90 degrees (the directions of the two grooves in the latter are parallel) than the direction of the groove of the part A in the latter, which is not only harmless but also is only convenient for temporary assembly and fixation so as to facilitate the work.

In patent 1, the core part directly related to the temperature adjustment of the blowing air but structurally separated from the core part is shown in fig. 1-2 (device 1), and the corresponding relation of the related parts is (the pre-part digital code is the part number in the original patent, and the same applies below): 2 semiconductor cooling fins, namely component E, 6 vortex fans, namely component C, 7 radiator, namely component A, 10 radiator, namely component B, 11 fan, namely component D, but in the figure, the vortex fan used in patent 1 is changed into an axial fan, and the section of an air port can be increased to be more reasonable; as for patent 2, the relevant parts (and the corresponding ones in the device 1) belonging to the core part of the blast temperature regulation among the various parts thereof, after removing some redundant parts contained therein, are: 5 semiconductor cooling fins (component E), 71 fan (component C), 72 heat exchanger (component a), 81 heat storage fins +82 heat conduction pipe +84 heat sink fins (component B), 83 fan (component D), the overall structure of which is complicated and is less rational than patent 1.

In fact, the difference between the device 2 and the device 1 is only one point, except that the position of the component C is different, namely the top surface of the component a (i.e. the surface opposite to the bottom surface of the component a to which the component E is attached) is a plane (parallel plane) parallel to the bottom surface, the top surface of the component a (corresponding to the radiator of patent 7 or the heat exchanger of patent 2, in the shape of a rectangular cylinder) of the latter, the top surface of the component a is formed by a part of the parallel plane and another part of the inclined plane, the component a of the former is formed by cutting out a right-angled triangular cylinder from the other component a of the latter, but the position of the component C mounted on the inclined plane is changed from the original position, and the inclined angle is formed with the bottom surface, namely α shown in fig. 5-7 (so that the air intake and the bottom surface are not parallel and are at an angle, the former has impact and corresponding time with the latter, and the size and weight of the component a are reduced).

In the actual cooling comparison tests carried out with both the device 2 and the device 1, the part E specification and type, its current, the parts C and D, B, the ambient temperature, etc., were the same, only the part a was different from the above, and the result was that the device 2 cooled at least 1.5 ℃ more than the device 1, i.e. the heat exchange efficiency of the device 2, which was a preliminary improvement obtained by changing the shape of the part 1, was indeed improved.

Nevertheless, the device 2 still has the same disadvantage as the device 1 that it is difficult to assemble and fix directly so as to satisfy the requirement of enduring large external force for a long time without loosening or even separating (all the tests are completed by only temporary measures), and needs to be improved to remove the disadvantage. Therefore, the invention further improves the appearance of the component B, so that five main components are mutually overlapped and combined in series, and two technical schemes are generated: a and B, simple assembly and fixation of the device is made possible. The technical solution of the present invention is further described in detail by the accompanying drawings and the implementation examples.

Drawings

Fig. 1 is a front plan view of a basic device (device 1, which is a separate device integrating the core parts of patent nos. 1 and 2 and having the same function in principle), fig. 2 is a rear plan view of the basic device (device 1), fig. 3 is a front plan view of a comparison device (device 2), fig. 4 is a rear plan view of the comparison device (device 2), fig. 5 is a front plan view of a scheme a device (device 3), fig. 6 is a rear plan view of the scheme a device (device 3), fig. 7 is an assembly view of the scheme a device (device 3), fig. 8 is a front plan view of a scheme B device (device 4), and fig. 9 is a rear plan view of the scheme B device (device 4).

Meaning of the number noted:

1-main heat exchanger (or called part A, the same below), 2-auxiliary heat exchanger (part B), 3-air intake fan (part C), 4-air exhaust fan (part D), 5-TEC (part E), 6-air outlet (part A air port), 7-air outlet (part B air port), 8-air leakage port (device 3 part B), 9-useless port (device 3 part A), 10-bolt, 11-nut, 12-spring washer.

Examples of the embodiments

Schemes a and B are two implementation examples, where scheme a is a single-end air outlet device that can be used in common, scheme B is a special device (also a special case of scheme a) that outlets air at two ends, and the two corresponding devices (devices 3 and 4) are respectively shown in fig. 5 to 7 and fig. 8 to 9.

The method of achieving assembly fixation for the

devices

3 and 4 corresponding to the schemes a and B, respectively, includes two methods, i.e., a non-fastener method and a fastener method (the following a to d):

a. in the device, the C, D parts only use square axial flow fans with the same side length, and the hole positions and specifications of the mounting holes of the two fans are consistent;

b. drilling a hole matched with the mounting hole of the component C on the component A, then directly moving the latter to the flat top surface of the component C for the scheme B, changing the partial flat top surface of the component A into an inclined surface and enabling the length of the inclined surface to be the same as the side length of the component C for the scheme A, and then moving the latter to the inclined surface;

c. making the groove direction of the component B parallel to that of the component A, drilling a hole matched with the mounting hole of the component D on the body of the component B, then directly placing the component D on the flat top surface of the component B for the component B, changing part of the flat top surface of the component B into an inclined surface and making the inclined surface parallel to the inclined surface mentioned in the step B and having the same length for the component A, and then placing the component D on the inclined surface;

d. the 5 parts A, B, C, D, E are stacked in the correct order, strung together with bolts and avoiding touching the part E, fastened at the bolt ends with nuts plus spring washers (which is recommended), and if necessary plain washers.

Some of the other supplementary notes are:

1, coating the heat conduction material (such as coating heat conduction silicone grease) on the part E;

2 except the contact area part and the air outlet of the part C and the part E, the rest surfaces (including useless openings) of the part A are wrapped by heat-insulating materials to achieve good heat-insulating effect;

3, the bolt preferably adopts a non-metal product with good heat insulation effect, otherwise, the bolt is sleeved with a heat insulation sleeve;

the 4 pairs of bolts/nuts must be tightened with a proper and balanced force to prevent the ceramic shell of element E from being damaged by improper pressure or poor contact of both sides with element A, B;

5 the device of the invention can have complete air blowing and temperature adjusting functions under the condition of power supply, and the specific application is related to the final product or application, so the wearing way is not considered here;

6 as long as the direction change of the current of the part E can be controlled, the device can be switched back and forth between temperature reduction and temperature rise at any time;

the centers of the 7 element E and the C, D element are preferably aligned so that heat exchange is optimized on both sides of element E;

8 regarding the air leakage opening (8 in fig. 5) on the component B opposite to the air outlet, if some air leakage occurs, the air leakage will cause non-negligible influence on the air outlet temperature adjustment of the component a, and then the air leakage opening needs to be closed, otherwise, the air leakage opening can be ignored;

9 the angle α in fig. 5 should preferably be within 15-75 °, too small being similar to scheme B and too large being similar to

patent

1 and 2/conventional methods;

the front end and the rear end of the device 4 of the device 10 are provided with air outlets and air outlets, and the two ends of the device 2 are provided with air outlets.

The non-fastener method comprises the following steps:

fixing the C, D at corresponding position, fixing 5 parts into the device, and optionally taking appropriate measures to improve the stability of the device; scheme A also needs to (scheme B does not need) coat the heat-resistant super glue on the two sides of the plastic elastic sheet which is slightly thicker than part E and has excellent heat insulation property in advance to form a reversed-square gasket, and the gasket is put in the middle of part A, B after being sleeved on part E to be clamped from the two sides by part A, B.

When the non-fastener method is used, the part A, B does not need to be drilled, the side length of the part C, D and the length of the inclined surface on the corresponding part A, B are not required to be the same, the lengths of the inclined surfaces of the part A, C and the part B, D are only required to be the same, and the part A needs to be subjected to heat insulation treatment.

Obviously, the part B has heat/cold resistance consideration when being worn on the human body.

The above improvement, besides improving the heat exchange efficiency and making the assembly and fixation of each component simpler, the two schemes of blowing wind pressure will be lost, wherein the wind pressure loss of the scheme B of blowing wind at two ends is more than that of the scheme A of blowing wind at one end, but the former heat exchange efficiency is better than the latter, so that the scheme B is suitable for the special occasion with lower requirement on wind pressure, moreover, the latter heat exchange efficiency is reduced/increased along with the increase/reduction of the angle α (namely the change angle of the partial flat top surface to the inclined surface) in the figures 5-7, and the wind pressure is increased/reduced along with the increase/reduction of α (note that the scheme B is a special case when α of the scheme A is 0 degrees).

The profiles of both components A, B in fig. 5-7 are: the former is a pillar with a pentagon as a bottom surface (a pentagonal pillar 1), and the latter is a pillar with another pentagon as a bottom surface (a pentagonal pillar 2). In the figure, two parallel oblique lines are shown on the part a, which are the bases of a large, a small and a small right-angled triangle respectively, because the part a is an integral body, the two parallel oblique lines only indicate that two columns (called triangular columns for short) formed by taking a right-angled triangle as the bottom surface can be respectively divided from the part a of the pentagonal column 1, and the two triangular columns can be respectively and properly reduced or even removed (namely, the part a can be randomly changed in the process that the maximum number of the pentagonal column 1 is reduced and the minimum number of the two triangular columns are removed) under the condition that the final temperature regulation effect is not influenced, so that the part a is lightened and slimmed, but the large triangular column at the air outlet end is beneficial to the heat exchange efficiency if not reduced (the other small triangular column is not beneficial). In the figure, the part B is also shown with a line, which is the oblique waist of a right trapezoid at the air outlet, and only means that a cylinder (right trapezoid cylinder) formed by taking the right trapezoid as the bottom surface can be divided from the part B of the pentagonal cylinder 2, and the right trapezoid cylinder can be properly reduced or even removed (i.e. the part B can be arbitrarily changed in the process of removing the maximum pentagonal cylinder 2 and the minimum right trapezoid cylinder) without affecting the final temperature adjusting effect, so that the part B is reduced in weight and slimmed, but the heat exchange efficiency can also be benefited without reducing the part B.

Advantageous effects

As a further improvement of the device 2, the solutions a and B will result from which:

1, the heat exchange efficiency is further improved by optimizing relevant parameters (length, width and height, tooth thickness and tooth density of each of the components A and B, and specific and same bevel angle α under the condition of being selected as single-end air outlet) of the device (the device 2 is not optimized) by integrating the relevant requirements (temperature regulation range and/or heating/refrigerating power required by a final product, product size, selectable TEC and a fan), so that the heat exchange efficiency is higher than that of the

devices

1 and 2, namely, the temperature rise or the temperature fall under the same energy consumption condition is more, and otherwise, the energy consumption is less under the same temperature rise or temperature fall condition;

2 the weight and the size of the component A are reduced compared with the corresponding parts of the

patents

1 and 2 under the same heat exchange efficiency;

3 the fixation of each component and the protection of the component E are improved, the cost is reduced, and the overall size is reduced: schemes A and B change the

patent

1 and 2 that only the shell of the additional box is used for facilitating the fixation of relevant parts into the method that only fasteners or similar methods are used for directly fixedly assembling five parts into a device and protecting the part E is convenient and reliable, so that the box is saved, the cost and labor cost related to the box are reduced, and the whole size of the device is also reduced;

4 improve the air of the air inlet of the component C and the air of the air outlet of the component D and insulate heat: air inlet air temperature can be disturbed and influenced by exhaust outlet air temperature that is close in

original patent

1 and 2 to hinder holistic heat exchange efficiency to promote, restrict or influence final temperature regulating effect of blowing, because of two air mouths have become far away now, two air mouth cross section contained angles have also been big, this point just can improve yet.

Claims

1. The portable high-efficiency air-blowing temperature-adjusting device of the semiconductor refrigerating sheet is characterized in that: the semiconductor refrigerating sheet is used for heating/refrigerating air and then blowing the air out.

2. The apparatus of claim 1, wherein: the device contains 5 main components: two heat exchangers, two fans, a single semiconductor refrigeration piece or a multi-piece combination thereof (all called semiconductor refrigeration pieces) as a heat/cold source.

3. The apparatus of claim 1, wherein: the device contains fasteners or springs.

4. The apparatus of claim 1, wherein: the semiconductor refrigeration chip of the five main units as set forth in claim 2, wherein the heat exchanger and the fan are provided on both sides thereof, and the five main units are combined in tandem while being overlapped with each other.

5. The apparatus of claim 1, wherein: in the five main components as set forth in claim 2, the pair of the heat exchanger and the fan as set forth in claim 4, which is located on one side of the semiconductor cooling plate, and the heat exchanger and the fan on the other side thereof, is clamped or pressed by the fastening member as set forth in claim 3.

6. The apparatus of claim 1, wherein: two heat exchangers of 5 main units as set forth in claim 2, each having a flat surface (called mounting surface) for mounting a fan, one of the two mounting surfaces for such purpose being either a top surface parallel to the bottom surface of the heat exchanger on which it is mounted (i.e. the surface against which the semiconductor cooling plate is to be mounted, called bottom surface), or a slope surface in which a rectangle always has two sides perpendicular to the direction of the heat exchanger grooves and at unequal distances from the bottom surface and a flat surface parallel to the bottom surface and passing through the side of the rectangle which is smaller than the bottom surface, the flat surface having an angle of 15 ° to 75 ° with the slope surface.