阅读说明：本技术 同时具备顶检修和侧检修功能的新风换气机 (Fresh air ventilator with top maintenance and side maintenance functions ) 是由 邵安春 于 2021-01-28 设计创作，主要内容包括：同时具备顶检修和侧检修功能的新风换气机,属于新风换气机技术领域,包括壳体、热交换芯体、过滤网、前侧板、后侧板、左侧板、右侧板、顶板、底板、中隔板、后隔板、前隔板、侧部检修盖和底板检修盖,左侧板中部设置有侧部检修口,侧部检修盖设置在侧部检修口上,底板左侧设置有底板检修口,底板检修盖设置在底板检修口上；中隔板左端设置有装配槽A；后隔板右侧设置有装配槽B、左侧设置有装配槽C；前隔板右侧设置有装配槽D、左侧设置有装配槽E；侧部检修盖中部向右方向设置有内凸头,内凸头右端自后向前依次设置有装配槽G、装配槽F和装配槽H；本发明的有益效果是：同一台设备同时具备顶检修和侧检修功能。(The fresh air ventilator comprises a shell, a heat exchange core, a filter screen, a front side plate, a rear side plate, a left side plate, a right side plate, a top plate, a bottom plate, a middle baffle plate, a rear baffle plate, a front baffle plate, a side access cover and a bottom plate access cover, wherein the middle part of the left side plate is provided with a side access opening, the side access cover is arranged on the side access opening, the left side of the bottom plate is provided with the bottom plate access opening, and the bottom plate access cover is arranged on the bottom plate access opening; the left end of the middle partition plate is provided with an assembly groove A; the right side of the rear clapboard is provided with an assembly groove B, and the left side of the rear clapboard is provided with an assembly groove C; the right side of the front clapboard is provided with an assembly groove D, and the left side of the front clapboard is provided with an assembly groove E; the middle part of the side access cover is provided with an inner convex head towards the right direction, and the right end of the inner convex head is sequentially provided with an assembling groove G, an assembling groove F and an assembling groove H from back to front; the invention has the beneficial effects that: the same equipment has the functions of top maintenance and side maintenance.)

1. The fresh air ventilator with the top overhaul and side overhaul functions comprises a shell, a heat exchange core, a filter screen, a fresh air fan, a dirty air fan, a fresh air inlet, a fresh air outlet, a dirty air inlet and a dirty air outlet, wherein the shell comprises a front side plate, a rear side plate, a left side plate, a right side plate, a top plate and a bottom plate, and the filter screen comprises a fresh air filter screen and a dirty air filter screen; the heat exchange core body is arranged in the shell, the fresh air filter screen is arranged at the upper left of the heat exchange core body, and the dirty air filter screen is arranged at the lower left of the heat exchange core body; the fresh air outlet is arranged at the right part of the front side plate, the fresh air inlet is arranged at the left part of the rear side plate of the shell, the dirty air inlet is arranged at the left part of the front side plate, and the dirty air outlet is arranged at the right part of the rear side plate; a fresh air inlet cavity is formed between the fresh air inlet and the fresh air filter screen, a dirty air inlet cavity is formed between the dirty air inlet and the dirty air filter screen, a fresh air outlet cavity is formed between the right lower side of the heat exchange core and the fresh air outlet, and a dirty air outlet cavity is formed between the right upper side of the heat exchange core and the dirty air outlet; a middle partition plate is arranged between the fresh air outlet cavity and the dirty air outlet cavity, a front partition plate is arranged between the front end of the heat exchange core and the front side plate, and a rear partition plate is arranged between the rear end of the heat exchange core and the rear side plate; the fresh air fan is arranged in the fresh air outlet cavity, and the dirty air fan is arranged in the dirty air outlet cavity; the method is characterized in that:

the middle part of the left side plate is provided with a side access hole, the side access cover is arranged on the side access hole, the left side of the bottom plate is provided with a bottom plate access hole, and the bottom plate access cover is arranged on the bottom plate access hole;

the left end of the middle partition plate is provided with an assembly groove A, the inner concave angle of the assembly groove A is a 90-degree right angle, the shape of the right corner of the heat exchange core body is matched with that of the assembly groove A, and the right corner of the heat exchange core body is inserted in the assembly groove A and is in tight fit with each other;

an assembly groove B is formed in the right side of the rear partition plate, the inner concave angle of the assembly groove B is 130-140 degrees, the rear end corner of the heat exchange core body is inserted into the assembly groove B, and the rear end corner of the heat exchange core body tightly abuts against the bottom of the assembly groove B; an assembly groove C is formed in the left side of the rear partition plate, the assembly groove C is a flat-bottom inner groove with two right-angled sides, and one end of the fresh air filter screen is inserted into the assembly groove C and is in tight fit with each other;

an assembly groove D is formed in the right side of the front partition plate, the inner concave angle of the assembly groove D is 130 degrees and 140 degrees, the front end corner of the heat exchange core body is inserted into the assembly groove D, and the front end corner of the heat exchange core body tightly abuts against the bottom of the assembly groove D; an assembly groove E is formed in the left side of the front partition plate, the assembly groove E is a flat-bottom inner groove with two right-angled sides, and one end of the dirty air filter screen is inserted into the assembly groove B and is in tight fit with each other;

an inner convex head is arranged in the middle of the side access cover in the right direction, and an assembling groove G, an assembling groove F and an assembling groove H are sequentially arranged at the right end of the inner convex head from back to front; the inner concave angle of the assembly groove F is a 90-degree right angle, the shape of the left end corner of the heat exchange core body is matched with that of the assembly groove F, and the left end corner of the heat exchange core body is inserted into the assembly groove F and is in tight fit with each other; the assembly groove G is a flat-bottom inner groove with two right-angled sides, and the other ends of the fresh air filter screens are inserted into the assembly groove G and are in tight fit with each other; the assembly groove H is a flat-bottom inner groove with two right-angled sides, and the other ends of the dirty air filter screens are inserted into the assembly groove H and are in tight fit with each other;

the heat exchange core body is supported by an assembly groove A of the middle partition plate, an assembly groove B of the rear partition plate, an assembly groove D of the front partition plate and an assembly groove F of the lateral part access cover, the fresh air filter screen is supported by an assembly groove C of the rear partition plate and an assembly groove G of the lateral part access cover, and the dirty air filter screen is supported by an assembly groove E of the rear partition plate and an assembly groove H of the lateral part access cover.

2. The fresh air ventilator with both top and side service functions as claimed in claim 1, wherein: the heat exchange core body and the shell side plate form an angle of 45 degrees and are obliquely arranged at the left part in the shell.

3. The fresh air ventilator with both top and side service functions as claimed in claim 1, wherein: the inner concave angle of the assembling groove B is 135 degrees, one side edge of the inner concave angle is parallel to the direction of the rear side plate, the other side of the inner concave angle is a bevel edge, and the rear end of the heat exchange core body is close to the bevel edge.

4. The fresh air ventilator with both top and side service functions as claimed in claim 1, wherein: the inner concave angle of the assembling groove D is 135 degrees; one side of the inner concave angle is parallel to the direction of the front side plate, the other side of the inner concave angle is a bevel edge, and the front end of the heat exchange core body is close to the bevel edge.

5. The fresh air ventilator with both top and side service functions as claimed in claim 1, wherein: the side access cover is in plug-in connection with the side access opening, and the bottom plate access cover is in plug-in connection with the bottom plate access opening.

Technical Field

The invention relates to a fresh air ventilator with a maintenance function, in particular to a fresh air ventilator with a top maintenance function and a side maintenance function, belonging to the technical field of fresh air ventilators.

Background

The requirement of people on air quality in modern society is higher and higher, but the air tightness of buildings is better and better due to the continuous improvement of the building quality. Especially, when outdoor pollution is serious, the window is inconvenient to open, the indoor air ventilation performance is poor, bacteria, peculiar smell and the like are easy to generate, and the human health is influenced. Therefore, the fresh air ventilator is started, indoor air can be circulated, dirty indoor air is discharged outdoors, fresh outdoor air is filtered and input indoors, and comprehensive quality of indoor air of the air conditioner is improved by increasing fresh air to the maximum extent.

It is known that the heat exchange core, the fresh air filter screen and the dirty air filter screen of the fresh air ventilator need to be cleaned or updated after being used for a period of time, and the design of the access hole of the conventional fresh air ventilator is unreasonable, so that the actual installation and the maintenance are inconvenient.

Some fresh air ventilators are only provided with access holes in 1 direction, for example, a patent with the publication number of CN 206018951U and the application number of 2016210336901 entitled "a suspended ceiling type fresh air ventilator", wherein the lower end of a casing of the fresh air ventilator is provided with the access hole, and an inspector can quickly maintain the ventilator through the access hole.

Some fresh air ventilators are only provided with access panels for each filter, such as patent publication No. CN 209101493U, application No. 2018219186171 entitled "a ceiling type fresh air purification ventilator", and are provided with access panels made of EPP material corresponding to each filter, so that each filter can be replaced or cleaned regularly.

Although some fresh air ventilators have access holes in 2 directions, the access holes in 2 directions can only replace different parts, but can not replace all parts needing to be replaced simultaneously, for example, as disclosed in the patent with the publication number of CN 204373143U and the application number of 201420868612.8, the invention is named as 'a fresh air ventilator', a side access hole is formed in the side part of a shell to facilitate replacement of a heat exchange core, and a bottom access hole is formed in the bottom of the shell to facilitate replacement of an indoor filter screen and an outdoor filter screen.

In the actual use, assembly and maintenance process of the fresh air ventilator, the condition that maintenance is inconvenient in the design direction of an access hole is generated due to the complexity of the structure in a room and the integral attractiveness and comfort of the room. However, if the maintenance is considered in advance, the overall structural design of the room is damaged, and the bad effect on the placement of other furniture is generated. In order to meet the new demands of customers, innovative design must be made on the structure of the existing products.

Disclosure of Invention

The invention aims to overcome the defects of single maintenance port and unreasonable structure in the prior art, and provides a fresh air ventilator with top maintenance and side maintenance functions at the same time, so that the purpose that the same equipment has the top maintenance and side maintenance functions at the same time can be achieved.

In order to achieve the aim, the invention adopts the technical scheme that: the fresh air ventilator with the top overhaul and side overhaul functions comprises a shell, a heat exchange core, a filter screen, a fresh air fan, a dirty air fan, a fresh air inlet, a fresh air outlet, a dirty air inlet and a dirty air outlet, wherein the shell comprises a front side plate, a rear side plate, a left side plate, a right side plate, a top plate and a bottom plate, and the filter screen comprises a fresh air filter screen and a dirty air filter screen; the heat exchange core body is arranged in the shell, the fresh air filter screen is arranged at the upper left of the heat exchange core body, and the dirty air filter screen is arranged at the lower left of the heat exchange core body; the fresh air outlet is arranged at the right part of the front side plate, the fresh air inlet is arranged at the left part of the rear side plate of the shell, the dirty air inlet is arranged at the left part of the front side plate, and the dirty air outlet is arranged at the right part of the rear side plate; a fresh air inlet cavity is formed between the fresh air inlet and the fresh air filter screen, a dirty air inlet cavity is formed between the dirty air inlet and the dirty air filter screen, a fresh air outlet cavity is formed between the right lower side of the heat exchange core and the fresh air outlet, and a dirty air outlet cavity is formed between the right upper side of the heat exchange core and the dirty air outlet; a middle partition plate is arranged between the fresh air outlet cavity and the dirty air outlet cavity, a front partition plate is arranged between the front end of the heat exchange core and the front side plate, and a rear partition plate is arranged between the rear end of the heat exchange core and the rear side plate; the fresh air fan is arranged in the fresh air outlet cavity, and the dirty air fan is arranged in the dirty air outlet cavity;

the middle part of the left side plate is provided with a side access hole, the side access cover is arranged on the side access hole, the left side of the bottom plate is provided with a bottom plate access hole, and the bottom plate access cover is arranged on the bottom plate access hole;

the left end of the middle partition plate is provided with an assembly groove A, the inner concave angle of the assembly groove A is a 90-degree right angle, the shape of the right corner of the heat exchange core body is matched with that of the assembly groove A, and the right corner of the heat exchange core body is inserted in the assembly groove A and is in tight fit with each other;

an assembly groove B is formed in the right side of the rear partition plate, the inner concave angle of the assembly groove B is 130-140 degrees, the rear end corner of the heat exchange core body is inserted into the assembly groove B, and the rear end corner of the heat exchange core body tightly abuts against the bottom of the assembly groove B; an assembly groove C is formed in the left side of the rear partition plate, the assembly groove C is a flat-bottom inner groove with two right-angled sides, and one end of the fresh air filter screen is inserted into the assembly groove C and is in tight fit with each other;

an assembly groove D is formed in the right side of the front partition plate, the inner concave angle of the assembly groove D is 130 degrees and 140 degrees, the front end corner of the heat exchange core body is inserted into the assembly groove D, and the front end corner of the heat exchange core body tightly abuts against the bottom of the assembly groove D; an assembly groove E is formed in the left side of the front partition plate, the assembly groove E is a flat-bottom inner groove with two right-angled sides, and one end of the dirty air filter screen is inserted into the assembly groove B and is in tight fit with each other;

an inner convex head is arranged in the middle of the side access cover in the right direction, and an assembling groove G, an assembling groove F and an assembling groove H are sequentially arranged at the right end of the inner convex head from back to front; the inner concave angle of the assembly groove F is a 90-degree right angle, the shape of the left end corner of the heat exchange core body is matched with that of the assembly groove F, and the left end corner of the heat exchange core body is inserted into the assembly groove F and is in tight fit with each other; the assembly groove G is a flat-bottom inner groove with two right-angled sides, and the other ends of the fresh air filter screens are inserted into the assembly groove G and are in tight fit with each other; the assembly groove H is a flat-bottom inner groove with two right-angled sides, and the other ends of the dirty air filter screens are inserted into the assembly groove H and are in tight fit with each other;

the heat exchange core body is supported by an assembly groove A of the middle partition plate, an assembly groove B of the rear partition plate, an assembly groove D of the front partition plate and an assembly groove F of the lateral access cover, the fresh air filter screen is supported by an assembly groove C of the rear partition plate and an assembly groove G of the lateral access cover, and the dirty air filter screen is supported by an assembly groove E of the rear partition plate and an assembly groove H of the lateral access cover;

the heat exchange core body can be pushed in from the side part access hole direction to the left and the right or from the bottom plate access hole direction to the bottom plate, so that the left end, the rear end and the front end of the heat exchange core body are respectively inserted into the middle partition plate assembly groove A, the rear partition plate assembly groove B and the assembly groove D of the front partition plate; the fresh air filter screen and the dirty air filter screen can be pushed in from the side part access hole direction and from the left to the right, or from the bottom plate access hole direction and from the bottom to the top, so that one end of the fresh air filter screen is inserted into the assembly groove C of the rear baffle, and one end of the dirty air filter screen is inserted into the assembly groove E of the front baffle; therefore, the heat exchange core, the fresh air filter screen and the dirty air filter screen can be maintained by opening the side access cover from the side access opening, and the heat exchange core, the fresh air filter screen and the dirty air filter screen can be maintained by opening the bottom access cover from the bottom access opening;

the heat exchange core body and the shell side plate form an angle of 45 degrees and are obliquely arranged at the left part in the shell.

The inner concave angle of the assembling groove B is 135 degrees, one side edge of the inner concave angle is parallel to the direction of the rear side plate, the other side of the inner concave angle is a bevel edge, and the rear end of the heat exchange core body is close to the bevel edge.

The inner concave angle of the assembling groove D is 135 degrees; one side of the inner concave angle is parallel to the direction of the front side plate, the other side of the inner concave angle is a bevel edge, and the front end of the heat exchange core body is close to the bevel edge.

Lateral part access cover and lateral part access hole plug-in connection, bottom plate access cover and bottom plate access hole plug-in connection, the design is for the ease of maintenance for plug connection structure, and specific plug-in connection is conventional technique, no longer gives unnecessary details.

Compared with the prior art, the invention has the beneficial effects that: structural design is meticulous reasonable, easy dismounting, and is safe high-efficient, and same equipment possesses the top simultaneously and overhauls and the side overhauls the function. The lateral part and the lower top part are respectively provided with 1 access hole, and the heat exchange core body, the fresh air filter screen and the dirty air filter screen can be maintained or replaced from the side access hole direction or the bottom plate access hole direction respectively. Therefore, the installation is convenient for users, more installation position setting schemes can be provided, the overall structural design of the original room can not be damaged, and the overall attractive appearance of indoor furniture is not influenced. The maintenance of the fresh air ventilator is more convenient, the use of customers is more comfortable, the product is more popular in the market, and the product has more competitiveness in the sale.

Drawings

FIG. 1 is a schematic diagram of: the front view of the invention;

FIG. 2 is a diagram of: front view of the invention (with top panel removed);

FIG. 3 is a diagram of: the invention is a side view direction elevation view (side access cover open state);

FIG. 4 is a diagram of: the invention is viewed from the bottom in a direction elevation (the bottom plate access cover is in an open state);

FIG. 5 is a diagram of: FIG. 2 is an enlarged view of section A;

FIG. 6 is a diagram of: enlarged view of part B of FIG. 2;

FIG. 7 is a diagram of: enlarged view of part C of FIG. 2;

FIG. 8 is a diagram of: fig. 2 is an enlarged view of portion D.

Description of reference numerals: the heat exchange core comprises a shell 1, a heat exchange core body 2, a fresh air fan 3, a dirty air fan 4, a fresh air inlet 5, a fresh air outlet 6, a dirty air inlet 7, a dirty air outlet 8, a front side plate 9, a rear side plate 10, a left side plate 11, a right side plate 12, a top plate 13, a bottom plate 14, a middle partition plate 15, a front partition plate 16, a rear partition plate 17, a fresh air filter screen 18, a dirty air filter screen 19, a lateral access cover 20, a bottom plate access cover 21, an assembly groove A22, an assembly groove B23, an assembly groove C24, an assembly groove D25, an assembly groove E26, an assembly groove G27, an assembly groove F28 and an assembly groove H29.

Detailed Description

The invention is further described with reference to the following figures and specific examples, which are not intended to be limiting.

As shown in fig. 1 to 8, the fresh air ventilator having both top and side maintenance functions includes, as shown in fig. 1 and 2, a housing 1, a heat exchange core 2, a filter screen, a fresh air blower 3, a dirty air blower 4, a fresh air inlet 5, a fresh air outlet 6, a dirty air inlet 7, and a dirty air outlet 8, wherein the housing 1 includes a front side plate 9, a rear side plate 10, a left side plate 11, a right side plate 12, a top plate 13, and a bottom plate 14, and the filter screen includes a fresh air filter screen 18 and a dirty air filter screen 19; the heat exchange core body 2 is arranged in the shell 1, the fresh air filter screen 18 is arranged at the upper left of the heat exchange core body 2, and the dirty air filter screen 19 is arranged at the lower left of the heat exchange core body 2; the fresh air outlet 6 is arranged at the right part of the front side plate 9, the fresh air inlet 5 is arranged at the left part of the rear side plate 10 of the shell 1, the dirty air inlet 7 is arranged at the left part of the front side plate 9, and the dirty air outlet 8 is arranged at the right part of the rear side plate 10; a fresh air inlet cavity is formed between the fresh air inlet 5 and the fresh air filter screen 18, a dirty air inlet cavity is formed between the dirty air inlet 7 and the dirty air filter screen 19, a fresh air outlet cavity is formed between the lower right side of the heat exchange core 2 and the fresh air outlet 6, and a dirty air outlet cavity is formed between the upper right side of the heat exchange core 2 and the dirty air outlet 8; a middle clapboard 15 is arranged between the fresh air outlet cavity and the dirty air outlet cavity, a front clapboard 16 is arranged between the front end of the heat exchange core 2 and the front side plate 9, and a rear clapboard 17 is arranged between the rear end of the heat exchange core 2 and the rear side plate 10; the fresh air fan 3 is arranged in the fresh air outlet cavity, and the dirty air fan 4 is arranged in the dirty air outlet cavity;

as shown in fig. 3 and 4, the multifunctional maintenance tool further comprises a side access cover 20 and a bottom plate access cover 21, wherein a side access opening is formed in the middle of the left side plate, the side access cover 20 is arranged on the side access opening, a bottom plate access opening is formed in the left side of the bottom plate 14, and the bottom plate access cover 21 is arranged on the bottom plate access opening;

as shown in fig. 2 and 5, the left end of the middle partition 15 is provided with an assembly groove a 22, the inner concave angle β of the assembly groove a 22 is a 90 ° right angle, the shape of the right end corner of the heat exchange core 2 matches the shape of the assembly groove a 22, and the right end corner of the heat exchange core 2 is inserted into the assembly groove a 22 and is tightly fitted with each other;

as shown in fig. 2 and 6, the right side of the rear partition 17 is provided with an assembly groove B23, the inner concave angle γ of the assembly groove B23 is 135 °, the rear end corner of the heat exchange core 2 is inserted into the assembly groove B23, and the rear end corner of the heat exchange core 2 is tightly abutted against the bottom of the assembly groove B23; an assembly groove C24 is formed in the left side of the rear partition plate 17, the assembly groove C24 is a flat-bottom inner groove with two right-angled sides, and one end of the fresh air filter screen 18 is inserted into the assembly groove C24 and is in tight fit with each other;

as shown in fig. 2 and 7, the right side of the front partition 16 is provided with an assembly groove D25, the inner concave angle θ of the assembly groove D25 is 135 °, the front end corner of the heat exchange core 2 is inserted into the assembly groove D25, and the front end corner of the heat exchange core 2 is tightly abutted against the bottom of the assembly groove D25; an assembly groove E26 is formed in the left side of the front partition plate 16, the assembly groove E26 is a flat-bottom inner groove with two right-angled sides, and one end of the dirty air filter screen 19 is inserted into the assembly groove B23 and is in tight fit with each other;

as shown in fig. 2 and 8, an inner protrusion is arranged in the middle of the side access cover 20 in the right direction, and a mounting groove G27, a mounting groove F28 and a mounting groove H29 are sequentially arranged at the right end of the inner protrusion from back to front; the inner concave angle delta of the assembly groove F28 is a 90-degree right angle, the shape of the left end corner of the heat exchange core body 2 is matched with that of the assembly groove F28, and the left end corner of the heat exchange core body 2 is inserted in the assembly groove F28 and is in tight fit with each other; the assembly groove G27 is a flat-bottom inner groove with two right-angled sides, and the other end of the fresh air filter screen 18 is inserted into the assembly groove G27 and is in tight fit with each other; the assembly groove H29 is a flat-bottom inner groove with two right-angled sides, and the other ends of the dirty air filter screens 19 are inserted into the assembly groove H29 and are tightly matched with each other;

the heat exchange core 2 is supported by the assembly groove a 22 of the middle partition 15, the assembly groove B23 of the rear partition 17, the assembly groove D25 of the front partition 16, and the assembly groove F28 of the side access cover 20, the fresh air filter 18 is supported by the assembly groove C24 of the rear partition 17 and the assembly groove G27 of the side access cover 20, and the dirty air filter 19 is supported by the assembly groove E26 of the rear partition 17 and the assembly groove H29 of the side access cover 20;

as shown in fig. 2 to 8, the heat exchange core 2 can be pushed in from the side access opening direction, from left to right, or from the bottom access opening direction, from bottom to top, so that the left end, the rear end and the front end of the heat exchange core 2 are respectively inserted into the assembly grooves a 22, B23 and D25 of the middle partition 15, the rear partition 17 and the front partition 16; the fresh air filter screen 18 and the dirty air filter screen 19 can be pushed in from the side part access hole direction and from the left to the right, or from the bottom plate access hole direction and from the bottom to the top, so that one end of the fresh air filter screen 18 is inserted into the assembly groove C24 of the rear partition plate 17, and one end of the dirty air filter screen 19 is inserted into the assembly groove E26 of the front partition plate 16; therefore, the heat exchange core body 2, the fresh air filter screen 18 and the dirty air filter screen 19 can be maintained by opening the side access cover 20 from the side access opening, and the heat exchange core body 2, the fresh air filter screen 18 and the dirty air filter screen 19 can be maintained by opening the bottom access cover 21 from the bottom access opening;

assembling sequence:

(1) firstly, assembling a shell 1, each air port and a fan;

(2) then assembling the heat exchange core 2, and pushing the heat exchange core 2 from the side access hole direction to the left right or from the bottom access hole direction to the bottom up, so that the left end, the front end and the rear end of the heat exchange core 2 are respectively inserted and combined with the middle partition 15, the front partition 16 and the rear partition 17;

(3) assembling a fresh air filter screen 18 and a dirty air filter screen 19, pushing the fresh air filter screen 18 and the dirty air filter screen 19 from the side part access hole direction to the left side to the right side, or from the bottom plate access hole direction to the bottom side to the top side, so that one end of the fresh air filter screen 18 is inserted into the assembly groove C24 of the rear partition plate 17, and one end of the dirty air filter screen 19 is inserted into the assembly groove E26 of the front partition plate 16;

(4) then assembling a side access cover 20, inserting the side access cover 20 rightwards along a side access opening, simultaneously inserting the left end of the heat exchange core body 2 into an assembly groove F28, inserting the other end of a fresh air filter screen 18 into an assembly groove G27 of a rear partition plate 17, and inserting the other end of a dirty air filter screen 19 into an assembly groove H29 of a front partition plate 16;

(5) finally, the bottom plate access cover 21 is covered;

the disassembly sequence is the reverse of the assembly sequence and will not be described in detail.

The heat exchange core body 2 and the side plate of the shell 1 form an angle alpha of 45 degrees and are obliquely arranged at the left part in the shell 1.

Lateral part access cover 20 and lateral part access hole plug-in connection, bottom plate access cover 21 and bottom plate access hole plug-in connection, the design is for the convenience of maintenance for the plug connection structure, and specific plug-in connection is conventional technique, no longer gives details.

The above-described embodiments are merely preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.