CN115789949A - Combined air conditioning unit mounting structure - Google Patents

Combined air conditioning unit mounting structure Download PDF

Info

Publication number
CN115789949A
CN115789949A CN202211449127.2A CN202211449127A CN115789949A CN 115789949 A CN115789949 A CN 115789949A CN 202211449127 A CN202211449127 A CN 202211449127A CN 115789949 A CN115789949 A CN 115789949A
Authority
CN
China
Prior art keywords
air conditioning
conditioning unit
main frame
frame body
mounting structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211449127.2A
Other languages
Chinese (zh)
Inventor
廉刚
宋丽婷
廉毅
李明伟
黄晓强
左体勇
闫俊清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Tobacco Henan Industrial Co Ltd
Original Assignee
China Tobacco Henan Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Tobacco Henan Industrial Co Ltd filed Critical China Tobacco Henan Industrial Co Ltd
Priority to CN202211449127.2A priority Critical patent/CN115789949A/en
Publication of CN115789949A publication Critical patent/CN115789949A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)

Abstract

The invention discloses a combined type air conditioning unit mounting structure which comprises a main frame body, wherein mounting frames are arranged at two ends of the outer side wall of the main frame body, and mounting holes connected with a wall body are formed in the mounting frames. The inside of main frame body is used for placing air conditioning unit, and corresponding through-hole has still been seted up to the both sides wall of main frame body, and the through-hole endotheca is equipped with the screwed pipe, is equipped with threaded connection's threaded rod in the screwed pipe, and screw propulsion through two threaded rods to make air conditioning unit stabilize in the inside of main frame body. One side of the bottom of the main frame body is also provided with a water accumulation disc, the bottom of the water accumulation disc is provided with a hollow connecting pipe, the end part of the connecting pipe is provided with a connecting frame, and a water outlet of the air conditioning unit corresponds to the water accumulation disc so as to realize the collection and reutilization of air conditioning water. The invention is convenient for the installation convenience of the lifting device structure, is convenient for collecting and processing air conditioner water, and is convenient for the installation and fixation operation of the air conditioner.

Description

Combined air conditioning unit mounting structure
Technical Field
The invention relates to the technical field of installation of air conditioning units, in particular to a combined air conditioning unit installation structure.
Background
In chinese patent CN202022414451.3, a mounting bracket for an air conditioning unit is provided. The mounting bracket of the air conditioning unit comprises a box body; the air conditioning unit is movably arranged in the box body; the two placing grooves are symmetrically formed in the bottom of the box body; the two support columns are symmetrically and fixedly arranged at the bottom of the air conditioning unit and are movably connected with the inner walls of the corresponding placing grooves; the cavity is formed in the box body; the inner groove is formed in the inner wall of the placing groove; the first straight gear is rotatably arranged in the cavity; the first threaded rod is rotatably installed in the cavity, and one end of the first threaded rod extends into the corresponding inner groove. The mounting bracket of the air conditioning unit provided by the invention has the advantages of effectively protecting the air conditioning unit, prolonging the service life and effectively blocking impurities in the air.
The convenient degree of installation that current mounting structure exists the hoisting device structure of not being convenient for collects the processing to air conditioner water not being convenient for, is not convenient for install the problem of fixed operation to the air conditioner machine.
Therefore, how to provide a mounting bracket which is convenient to mount and can collect and treat air conditioning water at the same time becomes a technical problem which needs to be solved in the field.
Disclosure of Invention
The invention aims to provide a combined air conditioning unit mounting structure which can effectively solve the problems in the background technology.
According to one aspect of the invention, the combined type air conditioning unit mounting structure comprises a main frame body, wherein mounting frames are arranged at two ends of the outer side wall of the main frame body, and mounting holes connected with a wall body are formed in the mounting frames;
the air conditioning unit is placed in the main frame body, corresponding through holes are formed in two side walls of the main frame body, threaded pipes are sleeved in the through holes, threaded rods in threaded connection are arranged in the threaded pipes, and the air conditioning unit is stabilized in the main frame body through spiral propulsion of the two threaded rods;
the bottom one side of main frame body still is equipped with the ponding dish, the bottom of ponding dish is equipped with hollow connecting pipe, the tip of connecting pipe is equipped with the link frame, air conditioning unit's delivery port with the ponding dish is corresponding to realize that the collection of air conditioner water is recycled.
Optionally, according to the combined air conditioning unit mounting structure provided by the invention, an opening is formed in one end, away from the connecting pipe, of the connecting frame, and a water collecting drawer in sliding connection is further arranged in the connecting frame, and the water collecting drawer can enter the connecting frame along the opening.
Optionally, according to the combined air conditioning unit mounting structure provided by the invention, a pulling handle is further arranged at one end of the water collection drawer close to the opening.
Optionally, according to the combined air conditioning unit mounting structure provided by the invention, one end of the threaded rod, which is close to the air conditioning unit, is rotatably connected with a fixed disk, and a rubber pad is further arranged on one side, which faces the air conditioning unit, of the fixed disk.
Optionally, according to the combined air conditioning unit mounting structure of the present invention, a limiting plate is further disposed at an end of the threaded rod away from the air conditioning unit, and a diameter of the limiting plate is greater than a diameter of the threaded pipe.
Optionally, according to the installation structure of the combined air conditioning unit, the limiting plate is further provided with a rotating rod, and the rotating rod is used for shifting the threaded rod to rotate.
Optionally, according to the combined air conditioning unit mounting structure provided by the invention, the top of the main frame body is further provided with a fixing sleeve, a connecting rod is arranged in the fixing sleeve, and the top of the connecting rod is provided with a protective top plate.
Optionally, according to the combined air conditioning unit installation structure provided by the invention, the number of the fixing sleeves is four, and the fixing sleeves are distributed at four corners of the top of the main frame body.
Optionally, according to the combined air conditioning unit installation structure of the present invention, the connecting rod and the fixing sleeve are in a plug-in type detachable structure.
Optionally, according to the modular air conditioning unit mounting structure of the present invention, the size of the protective roof is larger than the size of the top surface of the air conditioning unit.
The invention has the advantages that:
1. through the arrangement of the mounting frame and the mounting holes, the main frame body can be conveniently mounted and fixed, so that the mounting convenience effect of the device structure is improved, meanwhile, through the arrangement of the water collecting disc, water generated by the air conditioner can be collected and conveyed into the water collecting drawer on the inner side of the connecting frame through the connecting pipe, and the collection treatment of the water of the air conditioner is facilitated;
2. through the setting of the inboard threaded rod of screwed pipe, can rotate the threaded rod and adjust the fixed disk to install fixed operation to the air conditioner, simultaneously, through aiming at fixed cover with protection roof end connection pole, realized installing fixedly to the protection roof, promoted the safety protection nature effect of device structure.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic perspective view of the overall front view of the present invention;
FIG. 2 is a schematic perspective view of the present invention in an overall side view;
FIG. 3 is a schematic perspective view of the overall rear view of the present invention;
fig. 4 is a schematic overall top-view perspective structure of the present invention.
Description of reference numerals: 1. a main frame body; 2. a mounting frame; 3. mounting holes; 4. a water accumulation plate; 5. a connecting pipe; 6. a connecting frame; 7. a water collection drawer; 8. a connecting handle; 9. a threaded pipe; 10. a threaded rod; 11. fixing the disc; 12. fixing a sleeve; 13. a connecting rod; 14. a protective roof; 15. a limiting plate; 16. and rotating the rod.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
According to the drawings from fig. 1 to fig. 4, the invention provides a combined type air conditioning unit mounting structure, which comprises a main frame body 1, wherein mounting frames 2 are arranged at two ends of the outer side wall of the main frame body 1, and mounting holes 3 connected with a wall body are formed in the mounting frames 2.
At least two pairs of mounting holes 3 are symmetrically arranged on the inner side of the mounting frame 2 so as to improve the connection strength between the mounting frame 2 and the wall body. The longitudinal section of the mounting rack 2 is arranged in an L shape, and the mounting racks 2 are symmetrically provided with a pair about the central axis of the main frame body 1; through the setting of mounting bracket 2 and mounting hole 3, can be convenient for install fixed operation to main frame body 1 to this installation convenient degree effect that has promoted the device structure.
The inside of main frame 1 is used for placing air conditioning unit, and corresponding through-hole has still been seted up to the both sides wall of main frame 1, and the through-hole endotheca is equipped with screwed pipe 9, is equipped with threaded connection's threaded rod 10 in the screwed pipe 9, and screw propulsion through two threaded rods 10 to make air conditioning unit stabilize in the inside of main frame 1. Through the setting of threaded rod 10 in screwed pipe 9, can rotate threaded rod 10 and adjust to carry out installation fixed operation to the air conditioner.
The water collecting disc 4 is further arranged on one side of the bottom of the main frame body 1, the hollow connecting pipe 5 is arranged at the bottom of the water collecting disc 4, the connecting frame 6 is arranged at the end of the connecting pipe 5, and a water outlet of the air conditioning unit corresponds to the water collecting disc 4 so as to achieve collection and reutilization of air conditioning water.
Further, the one end that connecting frame 6 kept away from connecting pipe 5 is equipped with the opening, and its inside drawer 7 that catchments that still is equipped with sliding connection, the drawer 7 that catchments can be along opening entering connecting frame 6 in. Through the setting of ponding dish 4, can collect the water that the air conditioner produced to carry to the collection steamer tray 7 of 6 inboard sides of linking frame in through connecting pipe 5, be convenient for collect the processing to the air conditioner water.
Still further, the one end that catchments the steamer tray 7 and be close to the opening still is equipped with connection handle 8 to operating personnel does benefit to and draws water the steamer tray 7.
Further, one end of the threaded rod 10, which is close to the air conditioning unit, is rotatably connected with a fixed disk 11, and a rubber pad is further arranged on one side, facing the air conditioning unit, of the fixed disk 11. The fixed disk 11 can increase the contact area between the fixed disk and the side wall of the air conditioning unit, and local depression caused by the fact that the threaded rod 10 abuts against the air conditioning unit is avoided. In addition, the fixed disk 11 is rotatably connected with the threaded rod 10, so that when the fixed disk 11 is abutted against the air conditioning unit, the problem that the friction force between the fixed disk and the air conditioning unit can cause difficulty in screwing the threaded rod 10, and the clamping force of the two threaded rods 10 on the air conditioning unit is insufficient is effectively solved; the rubber pad can protect the side wall of the air conditioning unit, and reduce the abrasion of the fixed disk 11 to the side wall of the air conditioning unit; secondly, the rubber pads can also effectively increase the friction force between the fixed disc 11 and the air conditioning unit, improve the clamping effect of the air conditioning unit, and ensure that the air conditioning unit can be stably fixed in the main frame body 1.
Furthermore, a limiting plate 15 is further arranged at one end, away from the air conditioning unit, of the threaded rod 10, and the diameter of the limiting plate 15 is larger than that of the threaded pipe 9. The limit plate 15 limits the displacement distance of the threaded rod 10 and at the same time prevents the threaded rod 10 from being completely detached from the threaded pipe 9.
Still further, the limiting plate 15 is further provided with a rotating rod 16, and the rotating rod 16 is used for stirring the threaded rod 10 to rotate. When the device is arranged, the rotating rod 16 can be arranged on the side wall of the limit plate 15, or on the end surface of the limit plate 15, and the structure of the rotating rod 16 is not limited to a straight rod structure, and can be a Z-shaped handle rod or an L-shaped bent rod; in addition, can set up the rubber sleeve on the dwang 16 to increase the frictional force between dwang 16 and the operating personnel palm, help the quick rotation threaded rod 10 of operating personnel, and the rubber sleeve can also play certain protective effect to operating personnel's palm.
Furthermore, the top of the main frame 1 is further provided with a fixing sleeve 12, a connecting rod 13 is arranged in the fixing sleeve 12, and the top of the connecting rod 13 is provided with a protective top plate 14. Because the air conditioning unit is generally placed outdoors, the air conditioning unit is naturally eroded by wind, rain and sunshine for a long time, and the service life of the air conditioning unit is rapidly reduced for a long time. In addition, the protective top of the invention is not limited to a flat plate structure, and can also be a herringbone plate, a wave plate, an arc plate and other structures.
Furthermore, the number of the fixing sleeves 12 is four, and the fixing sleeves are distributed at four corners of the top of the main frame 1, so that the connection strength between the main frame 1 and the protection top plate 14 is improved, and the single connecting rod 13 is prevented from being easily broken.
Still further, connecting rod 13 and fixed cover 12 are the dismantlement structure of plug-in type, are convenient for dismantlement and installation between the two, and when protection roof 14 was damaged by wind-blown sunshine and rain for a long time, can be solitary bad protection roof 14 can.
Still further, the size of protection roof 14 is greater than the top surface size of air conditioning unit, guarantees that protection roof 14 can cover air conditioning unit and main framework 1 completely to guarantee the protective effect to air conditioning unit and main framework 1.
The working principle is as follows: firstly, the installation and fixing operation of the main frame body 1 can be conveniently carried out through the installation frame 2 and the installation holes 3, so that the installation convenience effect of the device structure is improved, and meanwhile, water generated by an air conditioner can be collected through the arrangement of the water collecting disc 4 and is conveyed into the water collecting drawer 7 on the inner side of the connecting frame 6 through the connecting pipe 5, so that the collection and treatment of the air conditioner water are conveniently carried out;
then, through the setting of the inboard threaded rod 10 of screwed pipe 9, can rotate threaded rod 10 and adjust fixed disk 11 to install fixed operation to the air conditioner, simultaneously, through aiming at fixed cover 12 with 14 end connecting rods 13 of protection roof, realized installing fixedly to protection roof 14, promoted the safety protection nature effect of device structure.
Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. The combined type air conditioning unit mounting structure is characterized by comprising a main frame body, wherein mounting frames are arranged at two ends of the outer side wall of the main frame body, and mounting holes connected with a wall body are formed in the mounting frames;
the air conditioning unit is placed in the main frame body, corresponding through holes are formed in two side walls of the main frame body, threaded pipes are sleeved in the through holes, threaded rods in threaded connection are arranged in the threaded pipes, and the air conditioning unit is stabilized in the main frame body through spiral propulsion of the two threaded rods;
the bottom one side of main frame body still is equipped with the ponding dish, the bottom of ponding dish is equipped with hollow connecting pipe, the tip of connecting pipe is equipped with the link frame, air conditioning unit's delivery port with the ponding dish is corresponding to realize that the collection of air conditioner water is recycled.
2. The modular air conditioning unit mounting structure of claim 1, wherein an opening is formed at an end of the connection frame away from the connection pipe, and a slidably connected water collection drawer is further provided inside the connection frame, and the water collection drawer can enter the connection frame along the opening.
3. The modular air conditioning unit mounting arrangement of claim 2, wherein a pull handle is further provided at an end of the water collection drawer adjacent the opening.
4. The modular air conditioning unit mounting structure of claim 1, wherein a fixing plate is rotatably connected to an end of the threaded rod adjacent to the air conditioning unit, and a rubber pad is further disposed on a side of the fixing plate facing the air conditioning unit.
5. The modular air conditioning unit mounting structure of claim 4, wherein a limiting plate is further provided at an end of the threaded rod away from the air conditioning unit, and a diameter of the limiting plate is larger than a diameter of the threaded pipe.
6. The combined air conditioning unit mounting structure of claim 5, wherein the limiting plate is further provided with a rotating rod, and the rotating rod is used for stirring the threaded rod to rotate.
7. The modular air conditioning unit mounting structure of claim 1, wherein a fixing sleeve is further provided at a top of the main frame, a connecting rod is provided in the fixing sleeve, and a protection top plate is provided at a top of the connecting rod.
8. The modular air conditioning unit mounting structure of claim 7, wherein the number of said fixing covers is four, which are distributed at four corners of the top of said main frame.
9. The modular air conditioning unit mounting arrangement of claim 8, wherein said connecting bar and said harness are plug-in type removal structures.
10. The modular air conditioning unit mounting structure of claim 9, wherein the protective roof is larger in size than the top surface of the air conditioning unit.
CN202211449127.2A 2022-11-18 2022-11-18 Combined air conditioning unit mounting structure Pending CN115789949A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211449127.2A CN115789949A (en) 2022-11-18 2022-11-18 Combined air conditioning unit mounting structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211449127.2A CN115789949A (en) 2022-11-18 2022-11-18 Combined air conditioning unit mounting structure

Publications (1)

Publication Number Publication Date
CN115789949A true CN115789949A (en) 2023-03-14

Family

ID=85439030

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211449127.2A Pending CN115789949A (en) 2022-11-18 2022-11-18 Combined air conditioning unit mounting structure

Country Status (1)

Country Link
CN (1) CN115789949A (en)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000161703A (en) * 1998-11-30 2000-06-16 Mitsubishi Electric Corp Air conditioner
KR20060084606A (en) * 2005-01-20 2006-07-25 (주)에스.케이.이 Fluidity air conditioner setting apparatus
CN205037463U (en) * 2015-08-19 2016-02-17 浙江凯洲机电工程有限公司 Conveniently collect outer quick -witted mounting bracket of air conditioner of air conditioner comdenstion water
CN206683101U (en) * 2017-02-22 2017-11-28 深圳沃海森科技有限公司 The outdoor machine of air-conditioner mounting bracket of condensed water can be handled
CN108679743A (en) * 2018-04-03 2018-10-19 佛山市博蓄科技有限公司 A kind of air-conditioner outdoor set carriage of collectable air conditioner condensate water
CN109681972A (en) * 2018-12-28 2019-04-26 长沙小如信息科技有限公司 A kind of outer machine mounting seat of heat pump air conditioner and heat pump air conditioner unit
CN212029748U (en) * 2020-05-18 2020-11-27 佛山市顺德区约利节能设备有限公司 Industrial dehumidifier
CN213020038U (en) * 2020-08-24 2021-04-20 佛山市雁图环境系统设备有限公司 Rack that air conditioner outdoor unit used
CN214841604U (en) * 2021-04-30 2021-11-23 陕西建工第四建设集团有限公司 Combined noise reduction device of air conditioning unit
CN215892744U (en) * 2021-09-27 2022-02-22 浙江大松空调工程有限公司 High-precision air conditioner mounting frame capable of carrying out levelness self-detection
CN216997767U (en) * 2021-11-26 2022-07-19 北方联合电力有限责任公司达拉特旗发电分公司 Condensate polishing and separating equipment
CN114811759A (en) * 2022-05-10 2022-07-29 谢润平 Drawer type air conditioner installation extension support
CN217785340U (en) * 2022-06-25 2022-11-11 北京中科仁和环保科技有限公司 Outer quick-witted fixed knot of air conditioner constructs

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000161703A (en) * 1998-11-30 2000-06-16 Mitsubishi Electric Corp Air conditioner
KR20060084606A (en) * 2005-01-20 2006-07-25 (주)에스.케이.이 Fluidity air conditioner setting apparatus
CN205037463U (en) * 2015-08-19 2016-02-17 浙江凯洲机电工程有限公司 Conveniently collect outer quick -witted mounting bracket of air conditioner of air conditioner comdenstion water
CN206683101U (en) * 2017-02-22 2017-11-28 深圳沃海森科技有限公司 The outdoor machine of air-conditioner mounting bracket of condensed water can be handled
CN108679743A (en) * 2018-04-03 2018-10-19 佛山市博蓄科技有限公司 A kind of air-conditioner outdoor set carriage of collectable air conditioner condensate water
CN109681972A (en) * 2018-12-28 2019-04-26 长沙小如信息科技有限公司 A kind of outer machine mounting seat of heat pump air conditioner and heat pump air conditioner unit
CN212029748U (en) * 2020-05-18 2020-11-27 佛山市顺德区约利节能设备有限公司 Industrial dehumidifier
CN213020038U (en) * 2020-08-24 2021-04-20 佛山市雁图环境系统设备有限公司 Rack that air conditioner outdoor unit used
CN214841604U (en) * 2021-04-30 2021-11-23 陕西建工第四建设集团有限公司 Combined noise reduction device of air conditioning unit
CN215892744U (en) * 2021-09-27 2022-02-22 浙江大松空调工程有限公司 High-precision air conditioner mounting frame capable of carrying out levelness self-detection
CN216997767U (en) * 2021-11-26 2022-07-19 北方联合电力有限责任公司达拉特旗发电分公司 Condensate polishing and separating equipment
CN114811759A (en) * 2022-05-10 2022-07-29 谢润平 Drawer type air conditioner installation extension support
CN217785340U (en) * 2022-06-25 2022-11-11 北京中科仁和环保科技有限公司 Outer quick-witted fixed knot of air conditioner constructs

Similar Documents

Publication Publication Date Title
CN115789949A (en) Combined air conditioning unit mounting structure
CN210537217U (en) Integrated form computer cabinet
CN208845395U (en) A kind of novel easy-to-mount heat transmission blower
EP2587172A1 (en) Fan supporting structure for climate control machines with underfloor air flow
CN109032314A (en) A kind of air-cooled computer cabinet
CN117589618A (en) Steel cable abrasion early warning mechanism
CN212462375U (en) Portable security protection switch board
CN112726900B (en) Building curtain wall for ready-package modularization interior decoration
CN208207707U (en) A kind of computer cabinet being convenient to clean
CN211790705U (en) Outdoor cable distribution box with moisture-proof function
CN209118192U (en) A kind of computer hardware removes apparatus for ash
CN209877043U (en) Volute component and integrated stove
CN215265806U (en) Diversified dust removal shell for transformer
CN202440590U (en) Dust collection device for spinner
CN215817184U (en) Detachable pump station electrical information automatic control cabinet
CN111002936A (en) Inspection robot with anti-collision dumping structure
CN215982968U (en) Special air conditioner for machine room
CN116878155A (en) Wet curtain supporting structure and humidifier
CN211981298U (en) Dampproofing effectual on-board switch board
CN217814041U (en) Anti-drop subassembly and safe ceiling fan of ceiling fan
CN212457277U (en) Ventilation device for civil air defense engineering
CN209138190U (en) A kind of large-scale air clearing machine casing
CN218977159U (en) High-bearing fracture-preventing network cabinet
CN218349101U (en) Drying device is used in vortex yarn processing
CN217215506U (en) External maintenance bypass device of UPS

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination