CN215087217U

CN215087217U - Test box with uniform internal temperature

Info

Publication number: CN215087217U
Application number: CN202120634812.7U
Authority: CN
Inventors: 谢伟民; 杨喜; 王海斌
Original assignee: Suzhou Being Medical Devices Co ltd
Current assignee: Suzhou Beiyin Technology Co ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-12-10
Anticipated expiration: 2031-03-29

Abstract

The utility model discloses a test box with uniform internal temperature, which comprises a box body, wherein a heat preservation layer, an air duct plate and a front door are arranged in the box body, the front door and the heat preservation layer form a closed constant-temperature inner cavity, a constant-temperature air circulation device is arranged in the constant-temperature inner cavity, and the air duct plate and the heat preservation layer form a circulation air duct; a heating device and an inflation type evaporator are arranged in the circulating air duct, and the heating device and the inflation type evaporator are arranged adjacently; the roll-bond evaporator is vertically arranged in the circulating air duct and forms gaps with the air duct plate and the heat insulation layer respectively. The utility model discloses a flat roll-bond evaporator is vertical to be located in the circulation wind channel and respectively with form the clearance between wind channel board and the heat preservation, make the gathering at the frosty water on body surface unable stop make the evaporator surface dry relatively on body surface. When the compressor is in operation, even if the surface of the roll-bond evaporator is frozen, the circulating air duct can not be blocked.

Description

Test box with uniform internal temperature

Technical Field

The utility model relates to a test equipment technical field, more specifically say, relate to an even proof box of inside temperature.

Background

The mode that makes cold and hot balance that experimental casees such as biochemical incubator, mould incubator, medicine stability test case, constant temperature and humidity case adopted makes the interior invariable temperature that maintains of experimental box. The constant temperature test box is used for detecting the performance of the material in various temperature environments and testing the heat resistance, cold resistance and other performances of various materials.

In the prior art, evaporators used in the test box generally adopt fin-tube heat exchangers, and the arrangement modes of the fin-tube heat exchangers in a circulating air duct are generally two. The first type has no clearance with the left side plate and the right side plate, so that hot air can completely exchange heat through the evaporator and then flow to the air outlet; the second type has certain clearance with left and right sides board, and like this partly hot-blast heat transfer through the evaporimeter, another part hot-blast flows through from evaporimeter both sides, does not carry out the heat transfer with the evaporimeter, and these two parts wind flow to the air outlet after mixing.

The temperature uniformity of the arrangement mode of the first evaporator is good, but under the condition of long-term low-temperature use, the surface of the evaporator is easy to freeze to completely block the air outlet, so that equipment faults are caused, and the second method can not block the air outlet due to freezing, but because the two parts of air are mixed unevenly, the temperature difference exists in each part in the test box body, and the temperature uniformity is poor.

SUMMERY OF THE UTILITY MODEL

Technical problem to prior art existence, the utility model aims at providing an even proof box of inside temperature has at least and enables the inside temperature of box highly even, makes the characteristics that have high uniformity of storing the sample environment, has solved the problem that the evaporimeter freezes and leads to equipment to break down.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a test box with uniform internal temperature comprises a box body, wherein a heat insulation layer, an air duct plate and a front door are arranged in the box body, the front door and the heat insulation layer form a closed constant-temperature inner cavity, a constant-temperature air circulating device is arranged in the constant-temperature inner cavity, and the air duct plate and the heat insulation layer form a circulating air duct; a heating device and an inflation type evaporator are arranged in the circulating air duct, and the heating device and the inflation type evaporator are arranged adjacently; the roll-bond evaporator is vertically arranged in the circulating air duct and forms gaps with the air duct plate and the heat insulation layer respectively.

Further, the air duct plate comprises an air duct back plate, a back air duct is formed by the air duct back plate and the heat insulation layer, and the roll-bond evaporator is arranged in the back air duct.

Furthermore, a plurality of air outlets arranged in an array are arranged on the air duct plate.

Further, the air duct plate comprises an air duct back plate, a bottom air duct plate, a left air duct plate and a right air duct plate, and the bottom air duct plate, the left air duct plate and the right air duct plate are arranged in the constant-temperature inner cavity.

Furthermore, the air outlet is arranged on the bottom air duct plate, the left air duct plate and the right air duct plate or/and the left air duct plate and the right air duct plate.

Further, the roll-bond evaporator is of a flat plate type.

Further, the roll-bond evaporator is vertically arranged in the circulating air duct. The vertical setting of roll-bond evaporator makes the frosting water of gathering on the body surface can't stop on the body surface and makes the evaporator surface dry relatively, and when the compressor at the operation in-process, even slight icing phenomenon appears in roll-bond evaporator surface, can not block up the circulation wind channel yet.

Further, the roll-bond evaporator is made of a metal material. Such as aluminum, copper, or stainless steel.

Further, the roll-bond evaporator comprises a body and a refrigeration channel arranged in the body, a refrigerant is placed in the refrigeration channel, the refrigerant flows in the refrigeration channel, and the air outside the body exchanges heat with the refrigerant.

To sum up, the utility model discloses following beneficial effect has:

1. the utility model discloses a flat roll-bond evaporator is vertical to be located make the gathering unable frosting water on body surface stop in the circulation wind channel and make the evaporator surface dry relatively at the body surface, when the compressor at the operation in-process, even roll-bond evaporator surface freezes, can not block up the circulation wind channel yet.

2. The utility model discloses a flat roll-bond evaporator respectively with form the clearance between wind channel board and the heat preservation, fall into the even two parts with the air inlet of return air inlet, carry out the heat transfer with two surfaces of roll-bond evaporator body respectively, two parts wind flows through behind the evaporimeter and flows from the air outlet in the mixture to make the air-out temperature even, and then make the inside temperature height of experimental box even.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Reference numerals: 1, insulating layer; 2, an air duct back plate; 3, an air return inlet; 4, circulating a fan; 5, an evaporator; 501, a body; 502 a refrigeration channel; 6 right side air duct plate; 7, a bottom air duct plate; 8 left air duct plate; 9, air outlet; 10 an electric heating tube; 11, a constant-temperature inner cavity; 12 a back air duct; 13 circulating the air duct.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example 1

Referring to fig. 1 and 2, the present embodiment includes a box body, in which an insulating layer 1 and a front door are arranged, and the insulating layer 1 and the front door form a closed constant temperature cavity 11. An air return opening 3 is formed in the heat-insulating layer 1, and the air return opening 3 is communicated with the outside air.

A circulating air duct 13, an air duct plate and a circulating fan 4 are arranged in the constant-temperature inner cavity 11, and the air duct plate is sleeved in the heat-insulating layer 1 to form a cavity interlayer. The air duct plate comprises an air duct back plate 2, a bottom air duct plate 7, a left air duct plate 8 and a right air duct plate 6, and the bottom air duct plate 7, the left air duct plate 8 and the right air duct plate 6 are arranged in the constant-temperature inner cavity 11.

Wherein, the air duct back plate 2 and the heat insulating layer 1 form a back air duct 12, and the air duct back plate 2, the left air duct plate 8, the right air duct plate 6 and the heat insulating layer form a circulating air duct 13.

An air outlet 9 is arranged on the air duct plate, the air outlet 9 is communicated with the constant-temperature inner cavity 13, and the circulating fan 4 is arranged adjacent to the air return inlet 3. The circulating fan 4 operates to circulate air throughout the circulating air duct 12 and the constant temperature chamber 11. Bottom air duct plate 7, left air duct plate 8 and right air duct plate 6 all are equipped with the air outlet 9 that the several is the array and arranges, and the air forms the circulation through the air duct plate and the bottom air duct plate 7 of both sides. The shape of the air outlet 9 may be, but is not limited to, circular, square, or strip.

Preferably, the air outlet 9 may be, but is not limited to, provided on the bottom air duct plate 7, the left air duct plate 8, and the right air duct plate 6.

Preferably, the air outlet 9 may be, but is not limited to, provided on the left air duct plate 8 and the right air duct plate 6.

The heat preservation layer 1 is provided with a return air inlet 3, the air duct plate is provided with an air outlet 9, the return air inlet 3 is communicated with the outside air, the air outlet 9 is communicated with the constant temperature inner cavity 11, and the circulating fan 4 is fixedly arranged in the back air duct 12. The circulating fan 4 operates to circulate air throughout the circulating air duct 12 and the constant temperature chamber 13.

The back air duct 12 is internally provided with an inflation type evaporator 5 and an electric heating pipe 10. The roll-bond evaporator 5 is arranged adjacent to the electric heating pipe 10, and the electric heating pipe 10 is arranged adjacent to the circulating fan 4. The electric heating pipe 10 is arranged on the periphery of the circulating fan 4 or between the evaporator 5 and the circulating fan 4.

The roll-bond evaporator 5 is a flat plate type evaporator connected to a compressor, and an internal pipe is manufactured by a roll-bond process. The roll-bond evaporator 5 is vertically arranged in the circulating air duct 13 and forms gaps with the air duct plate and the heat preservation layer respectively.

Referring to fig. 3, the internal structure of the roll-bond evaporator 5 is shown. The roll-bond evaporator is the main heat exchanger of refrigerating system, and evaporates the liquid refrigerant decompressed by the interaction of compressor and capillary tube to absorb the heat around the evaporator, so as to achieve the purpose of refrigeration. The roll-bond evaporator 5 used in the present embodiment is made of a metal material, such as aluminum, copper, or stainless steel, and includes a body 501, and a cooling passage 502 provided in the body 501, and a refrigerant is placed in the cooling passage 502, and flows in the plate. The main body 501 has front and back surfaces and is made of aluminum, copper, stainless steel or the like, and the external air on the front and back surfaces of the main body 501 exchanges heat with the refrigerant in the refrigerating passage 502.

The vertically arranged roll-bond evaporator 5 is adopted to lead the frosting water gathered on the surface of the body 501 to smoothly flow away, and when the compressor is in the operation process, even if the surface of the roll-bond evaporator 5 is frozen, the circulating air duct can not be blocked.

The working principle is as follows: fan 4, electric heating 10 and evaporimeter 5 are located the centre of wind channel backplate 2 and test box inner bag 1, and the air in the test box is inhaled the back wind channel from return air inlet 3 by fan 4, and the air is at first heated by circulating fan 4 adjacent electrothermal tube 10, and the air that is heated flows down, through roll-bond evaporator 5, carries out the heat transfer with roll-bond evaporator 5's front and back surface respectively, and in the bottom of evaporimeter 5, two strands of air current flow after mixing flow out from air outlet 9, get into constant temperature inner chamber 13.

Example 2

If the roll-bond evaporator is horizontally placed, the effective heat exchange surface is only the lower surface; due to the large area of the upper surface, the heat exchange efficiency is low due to the substantial absence of air flow after the air has been cooled above the upper surface. When the compressor works, the surface of the roll-bond evaporator frosts; the compressor stops working, the frost layer on the upper surface of the roll-bond evaporator naturally melts, and the defrosting water is gathered on the upper surface of the roll-bond evaporator. When the compressor works again, the defrosted water on the upper surface of the roll-bond evaporator freezes into ice, so that the air cannot be in direct contact with the upper surface of the roll-bond evaporator, thereby causing the heat exchange between the roll-bond evaporator and the air to be poor and influencing the refrigeration effect. Therefore, this embodiment will be vertical to be placed the roll-bond evaporator, and the air that is heated carries out the heat transfer with roll-bond evaporator 5's front and back surface respectively when passing through roll-bond evaporator 5, and in roll-bond evaporator 5's bottom, two air current flow streams from air outlet 9 after mixing, get into experimental box to the hot-air temperature that makes behind roll-bond evaporator 5 is even. On the other hand, the vertically arranged roll-bond evaporator 5 prevents the frosted water gathered on the surface of the body from staying on the surface of the body, so that the surface of the body is relatively dry, and when the compressor is in operation, even if the surface of the roll-bond evaporator is slightly frozen, the circulating air duct can not be blocked.

This example and the conventional test chamber were used as a control example, and the test was performed according to the requirements of GB/T28851-. Wherein:

the first scheme is that the finned tube is filled with hot air, and the heat exchanger has no gap with the left air duct plate and the right air duct plate.

The second scheme is a finned tube heat exchanger, and the heat exchanger has a certain gap with the left and right air duct plates;

the third embodiment is the roll-bond evaporator 5 described in example 1, and the heat exchanger has no gap with the left and right duct plates.

TABLE 1 Biochemical Chamber temperature uniformity test data

The utility model discloses can be applied to including but not limited to biochemical incubator, mould incubator, medicine stability test case and constant temperature and humidity case etc..

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings, or directly or indirectly applied to the field or the related field, are included in the protection of the present invention.

Claims

1. The utility model provides an even proof box of inside temperature, includes the box, its characterized in that: an insulating layer (1), an air duct plate and a front door are arranged in the box body, the front door and the insulating layer (1) form a closed constant-temperature inner cavity (11), the constant-temperature air circulating device is arranged in the constant-temperature inner cavity (11), and the air duct plate and the insulating layer form a circulating air duct (13);

a heating device and an inflation type evaporator (5) are arranged in the circulating air duct (13), and the heating device and the inflation type evaporator (5) are arranged adjacently;

the roll-bond evaporator (5) is arranged in the circulating air duct (13) and forms gaps with the air duct plate and the heat-insulating layer respectively.

2. A test chamber of uniform internal temperature according to claim 1, wherein: the air duct plate comprises an air duct back plate (2), the air duct back plate (2) and the heat insulation layer (1) form a back air duct (12), and the roll-bond evaporator (5) is arranged in the back air duct (12).

3. A test chamber of uniform internal temperature according to claim 2, wherein: the air duct plate is provided with a plurality of air outlets (9) which are arranged in an array.

4. A test chamber of uniform internal temperature according to claim 3, wherein: the air duct plate comprises an air duct back plate (2), a bottom air duct plate (7), a left air duct plate (8) and a right air duct plate (6), wherein the bottom air duct plate (7), the left air duct plate (8) and the right air duct plate (6) are arranged in the constant-temperature inner cavity (11).

5. A test chamber of uniform internal temperature according to claim 4, characterized in that: the air outlet (9) is arranged on the bottom air duct plate (7), the left air duct plate (8) and the right air duct plate (6) or/and the left air duct plate (8) and the right air duct plate (6).

6. A test chamber of uniform internal temperature according to claim 1, wherein: the roll-bond evaporator (5) is of a flat plate type.

7. A test chamber of uniform internal temperature according to claim 6, characterized in that: the roll-bond evaporator (5) is vertically arranged in the circulating air duct (13).

8. A test chamber of uniform internal temperature according to claim 1, wherein: the roll-bond evaporator (5) is made of metal material.

9. A test chamber having a uniform internal temperature according to any one of claims 1 to 8, wherein: the roll-bond evaporator (5) comprises a body (501) and a refrigerating channel (502) arranged in the body (501), refrigerant is placed in the refrigerating channel (502), the refrigerant flows in the refrigerating channel (502), and the air outside the body (501) is subjected to heat exchange with the refrigerant.