CN106678962B - A kind of indoor unit and indoor unit cooling capacity/heating capacity control method - Google Patents

Abstract

The invention discloses an indoor unit and a method for controlling the cooling capacity/heating capacity of the indoor unit. The indoor unit includes a skeleton and a heat exchanger structure. The heat exchanger structure includes a multi-section heat exchanger and a wind shield. The multi-section heat exchanger passes through The tube sheet is fixed to the skeleton, the two ends of the wind deflector are provided with mounting lugs, and the skeleton is arranged with two screw columns for limiting and fixing the wind deflector. The wind deflector is installed by The ear seat is fixed with the frame. When the required cooling capacity/heating capacity is large, replace the air baffle with a replacement section heat exchanger, and the replacement section heat exchanger is fixed to the skeleton through the tube sheet; when the required cooling capacity/heating capacity is small, the block The air plate replaces the replacement section heat exchanger, the air baffle is fixed to the frame, and the cost of the air baffle is much lower than the cost of the heat exchanger after the hairpin tube is removed; at the same time, it is easy to install and maintain, reducing labor maintenance costs.

Description

A kind of indoor unit and indoor unit cooling capacity/heating capacity control method

technical field

The invention belongs to the technical field of air conditioners, and in particular relates to an indoor unit and a method for controlling the cooling capacity/heating capacity of the indoor unit.

Background technique

At present, in the wall-mounted indoor unit of household air conditioner, one type of frame can only be matched with one type of evaporator, so if the cooling capacity is changed, the only way is to reduce the card issuing pipe of the existing evaporator 1 to realize the change of cooling capacity, and extract the card issuing card. The opening on the aluminum foil behind the tube needs to be blocked with a standard plug 2 to prevent dust from entering, as shown in Figure 1, resulting in a small adjustment range of the cooling capacity variation range of the indoor unit, and the cost is basically not reduced.

SUMMARY OF THE INVENTION

The present invention provides an indoor unit with large variation in cooling capacity/heating capacity and low cost.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to realize:

An indoor unit includes a frame and a heat exchanger structure, the heat exchanger structure includes a multi-section heat exchanger and a windshield, the multi-section heat exchanger is fixed to the frame through a tube sheet, and the windshield is The two ends of the windshield are provided with installation ear seats, and two screw columns are arranged on the frame to limit and fix the wind shield, and the wind shield is fixed to the frame through the installation ear seats.

Still further, the wind deflector is made of plastic.

Further, the wind deflector is made of foam material.

Still further, the wind deflector is pasted on the frame.

Preferably, the contact surface between the wind deflector and the multi-stage heat exchanger is stepped.

Further, the upper end of the multi-stage heat exchanger is embedded in the wind deflector.

Still further, a PE liner is arranged between the wind deflector and the multi-stage heat exchanger.

Further, the multi-stage heat exchanger includes two-stage heat exchangers: a first-stage heat exchanger and a second-stage heat exchanger, the two-stage heat exchangers intersect and form a certain angle, and the first-stage heat exchanger The lower end of the heat exchanger is fixed with the water receiving pan, and the upper end of the second-stage heat exchanger is abutted on the windshield.

A method for controlling cooling capacity/heating capacity of an indoor unit, the indoor unit includes a frame and a heat exchanger structure, the heat exchanger structure includes a multi-stage heat exchanger and a wind shield, the multi-stage heat exchanger passes through a pipe The plate is fixed to the frame, and installation ear seats are arranged at both ends of the windshield, and two screw columns are arranged on the frame to limit and fix the windshield, and the windshield passes through the installation ears. The seat is fixed with the frame;

The method includes:

Obtain the cooling capacity/heating capacity required by the indoor unit;

Determine whether the required cooling capacity/heating capacity is greater than the set value;

If so, replace the wind deflector with a section of heat exchanger, which is fixed to the frame through the tube sheet.

Compared with the prior art, the advantages and positive effects of the present invention are: in the indoor unit and the indoor unit cooling capacity/heating capacity control method of the present invention, when the required cooling capacity/heating capacity is large, the wind deflector is replaced. A replacement section heat exchanger is formed, the replacement section heat exchanger is fixed by the tube sheet and the skeleton, and the replacement section heat exchanger and the multi-stage heat exchanger jointly perform the heat exchange function; when the required cooling capacity/heating capacity is small, the windshield The plate replaces the replacement section heat exchanger, the windshield is fixed with the skeleton, the windshield and the multi-stage heat exchanger form a heat exchanger structure, the windshield acts as a wind shield, and the cost of the windshield is much lower than that of the first section. The cost of the heat exchanger after removing the hairpin tube; at the same time, the installation and maintenance are convenient, and the labor maintenance cost is reduced. Moreover, the skeleton 6 has strong adaptability, and can be fixedly connected to the windshield and to the heat exchanger of the replacement section, that is, the skeleton can fix the heat exchanger structure of two kinds of cooling capacity/heating capacity, which reduces the cost; Two indoor units with cooling capacity/heating capacity can be produced on the same indoor unit production platform, meeting different cooling capacity and power requirements and reducing production costs.

Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings.

Description of drawings

1 is a schematic structural diagram of an indoor unit heat exchanger in the prior art;

2 is a schematic structural diagram of an embodiment of the heat exchanger structure of the indoor unit proposed by the present invention;

Fig. 3 is the partial structure schematic diagram in Fig. 2;

Fig. 4 is the structural representation of the wind deflector in Fig. 3;

Fig. 5 is the structural representation of the skeleton in Fig. 3;

6 is a schematic structural diagram of an embodiment of the indoor unit proposed by the present invention;

7 is a schematic structural diagram of another embodiment of the indoor unit proposed by the present invention;

FIG. 8 is a method for controlling cooling capacity/heating capacity of an indoor unit proposed by the present invention.

Reference number:

1. Evaporator; 2. Plug;

3. Multi-stage heat exchanger; 4. Windshield; 4-1. Contact surface; 4-2. Installation ear seat;

5. Bottom water tray; 6. Frame; 6-1. Screw column; 6-2. Installation hole; 7. Shell; 8. Fan; 9. Air cavity.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

The indoor unit of this embodiment mainly includes a casing 7, a frame 6, a bottom water tray 5, a heat exchanger structure, a fan 8, etc. The casing 7 is fixed on the frame 6, and the bottom water tray 5 is located below the frame 6. It is fixed with the frame 6, an air inlet and an air outlet are provided on the shell 7, the fan 8 is located between the air inlet and the air outlet, the heat exchanger structure is located between the air inlet and the fan 8, and the heat exchanger structure and the bottom are connected. The water pan 5 and the skeleton 6 form an air cavity 9. Under the action of the fan 8, the airflow at the air inlet passes through the heat exchanger structure and enters the air cavity 9 after heat exchange, and then blows out from the air outlet, as shown in Figures 2 to 7 .

In this embodiment, the heat exchanger structure includes a multi-segment heat exchanger 3 and an air baffle 4. The multi-segment heat exchanger 3 is fixed to the frame 6 through a tube sheet, and the lower end of the multi-segment heat exchanger 3 is connected to the bottom. The water pan 5 is fixed, the upper end of the multi-stage heat exchanger 3 is abutted on the windshield 4, and the windshield 4 is fixed with the frame 6, so that the airflow at the air inlet enters the air cavity 9 through the heat exchanger structure to avoid air leakage .

In this embodiment, a plurality of installation holes 6-2 are opened in the lower part of the frame 6, the tube sheet is fixedly connected to the frame 6 through the installation holes 6-2, and the multi-section heat exchanger 3 is fixed to the tube sheet; in this embodiment , the tube sheet is fixed on the left side of the heat exchanger structure, which is the left tube sheet. Two screw columns 6 - 1 are arranged on the upper part of the frame 6 , and the two screw columns 6 - 1 play the role of limiting and fixing the wind deflector 4 . The two ends of the wind deflector 4 are provided with mounting ears 4-2, as shown in FIG. 4, the two mounting ears 4-2 are in one-to-one correspondence with the two screw columns 6-1. A mounting hole is opened on the top, and the screw passes through the mounting hole of the mounting ear seat 4-2 and is fixed to the screw column 6-1, so as to realize the stable connection between the wind deflector 4 and the frame 6, as shown in FIG. 7 .

Of course, the length of the wind deflector 4 is the same as that of the multi-stage heat exchanger 3 .

In this embodiment, the distance between the two screw columns 6-1 is greater than or equal to the length of the heat exchanger structure. The windshield 4 is fixed to the frame 6, and the two screw columns 6-1 are located at both ends of the windshield 4, which avoids the left and right displacement of the windshield 4, increases the connection stability of the windshield 4 and the frame 6, and avoids blocking The wind panel 4 falls off from the frame 6 .

In the indoor unit of this embodiment, the cooling capacity/heating capacity is variable, and the variation is large. When the required cooling capacity/heating capacity is large, the wind deflector 4 is replaced with a first-stage heat exchanger (which can be called "" Replacement section heat exchanger”), the replacement section heat exchanger is fixed with the skeleton 6 through the tube sheet, and the replacement section heat exchanger and the multi-stage heat exchanger 3 jointly perform the heat exchange function; when the required cooling capacity/heating capacity is small , the windshield 4 replaces the replacement section heat exchanger, the windshield 4 is fixed with the frame 6, the windshield 4 and the multi-stage heat exchanger 3 form a heat exchanger structure, and the windshield 4 acts as a wind shield, and The cost of the air baffle is much lower than the cost of a section of the heat exchanger after the hairpin tubes are extracted (in the prior art, the method of extracting several hairpin tubes of the heat exchanger is used to reduce the cooling capacity/heating capacity). Moreover, the distance between the two screw columns 6-1 arranged on the frame 6 is greater than or equal to the length of the wind deflector 4, that is, greater than or equal to the length of the multi-stage heat exchanger 3, so when the When the wind plate 4 is replaced with a replacement section heat exchanger, the screw column 6-1 will not affect the installation of the replacement section heat exchanger. Therefore, the design of the skeleton 6 has strong adaptability, and can be used with the wind shield 4 The fixed connection can also be fixedly connected with the heat exchanger of the replacement section, that is, the frame 6 can fix the heat exchanger structure of two kinds of cooling capacity/heating capacity, which reduces the cost.

Therefore, in the indoor unit of this embodiment, the air baffle is used to replace the first-stage heat exchanger (that is, the replacement of the first-stage heat exchanger) is used, which realizes a substantial reduction in the cooling capacity/heating capacity, and the cost is low; at the same time, the installation and maintenance are convenient. , reducing labor maintenance costs.

In this embodiment, the wind deflector 4 can be made of foam material, which is light in weight and low in cost.

The wind deflector 4 made of foam material can also be pasted on the skeleton 6 by glue, and is installed and limited by two screw columns 6-1, so as to avoid the left and right displacement of the wind deflector 4, the connection is stable and convenient, and it is easy to dismantle. installation, reducing maintenance and replacement costs.

As another preferred design solution of this embodiment, the wind deflector 4 can also be made of plastic, which is light in weight, low in cost and long in service life.

The multi-stage heat exchanger also includes a single-row heat exchanger, that is, a heat exchanger with only one stage.

In this embodiment, an important function of the wind baffle is to block the wind, so as to prevent the wind at the air inlet from entering the air cavity 9 through the multi-stage heat exchanger 3 and then dissipating, resulting in a decrease in heat exchange capacity. Therefore, the tightness of the connection between the wind deflector 4 and the multi-stage heat exchanger 3 is very important.

In order to improve the connection tightness between the wind deflector 4 and the multi-stage heat exchanger 3, the contact surface 4-1 of the wind deflector 4 and the multi-stage heat exchanger 3 is a stepped contact surface. 4-1 Fits with the side of the multi-stage heat exchanger 3 to increase the contact area with the multi-stage heat exchanger 3, improve the connection tightness, avoid air leakage, and thus avoid the resulting decrease in heat exchange capacity.

In order to further improve the connection tightness between the windshield 4 and the multi-stage heat exchanger 3, the upper end of the multi-stage heat exchanger 3 is embedded in the windshield 4 to further improve the connection tightness and avoid air leakage.

In order to further improve the connection tightness between the wind deflector 4 and the multi-stage heat exchanger 3, a PE liner is pasted between the wind deflector 4 and the multi-stage heat exchanger 3 to further improve the connection tightness and avoid air leakage.

In this embodiment, the multi-stage heat exchanger includes two-stage heat exchangers: a first-stage heat exchanger and a second-stage heat exchanger, the two-stage heat exchangers intersect and form a certain angle, and the first-stage heat exchanger The lower end of the heat exchanger is fixed with the bottom water receiving plate 5 , and the upper end of the second-stage heat exchanger is tightly abutted on the wind deflector 4 .

When the cooling capacity required by the indoor unit is relatively large, the air baffle 4 is replaced with a replacement section heat exchanger, and the replacement section heat exchanger forms a heat exchanger mechanism with the first section heat exchanger and the second section heat exchanger. The heat exchange function is performed together; when the cooling capacity/heating capacity required by the indoor unit is small, the air baffle 4 is used to replace the heat exchanger in the replacement section, and the air baffle 4 is connected with the first-stage heat exchanger and the second-stage heat exchanger. The heat exchanger structure is formed, the wind shield 4 plays the role of blocking the wind, and the cost of the wind shield is much lower than the cost of the replacement heat exchanger after the hairpin tube is removed. Therefore, the indoor unit of this embodiment adopts a shield The air plate replaces the first-stage heat exchanger, which increases the variation of the cooling capacity/heating capacity, and the cost is lower.

In this embodiment, the refrigerant flow path of the replacement-stage heat exchanger can be independent from the multi-stage heat exchanger 3, and when it needs to be replaced by a wind shield, the refrigerant pipeline can be avoided to be re-arranged, and the production efficiency can be improved.

In this embodiment, if the indoor unit has been assembled, but the cooling capacity/heating capacity is wrong and needs to be corrected, the air baffle 4 can be replaced with the heat exchanger in the replacement section, so as to adjust the cooling capacity/heating capacity , to avoid re-manufacturing the indoor unit, which not only reduces the cost, but also improves the efficiency.

Assuming that the indoor unit production platform can produce indoor units with a cooling capacity of 7000BTU, a three-stage heat exchanger needs to be used. If the indoor unit of 5000BTU needs to be produced, the third-stage heat exchanger can be replaced with a windshield. Therefore, Two indoor units with cooling capacity/heating capacity can be produced on the same indoor unit production platform, meeting different cooling capacity and power requirements and reducing production costs. At the same time, the tube sheet fixed on the skeleton remains unchanged, the installation and disassembly methods remain unchanged, the operation is simple, and the production efficiency is high.

Based on the above design of the indoor unit, this embodiment also proposes a method for controlling the cooling capacity/heating capacity of the indoor unit. The method mainly includes the following steps, as shown in FIG. 8 .

Step S1: Obtain the cooling capacity/heating capacity required by the indoor unit.

Step S2: Determine whether the required cooling capacity/heating capacity is greater than the set value.

If yes, go to step S3.

If not, go to step S4.

Step S3: Replace the air baffle with a first-stage evaporator (replace the first-stage heat exchanger), and fix it with the skeleton through the tube sheet.

Step S4: Replace the heat exchanger of the replacement section with a windshield, and the windshield is fixed to the frame through the screw column on the frame.

If the required cooling capacity is 5000BTU and the set value is 6000BTU, replace the heat exchanger in the replacement section with a windshield; if the required cooling capacity is 7000BTU and the set value is 6000BTU, replace the windshield with a replacement section Heat Exchanger.

Therefore, in the indoor unit and the indoor unit cooling capacity/heating capacity control method of this embodiment, when the required cooling capacity/heating capacity is large, the windshield is replaced with a replacement section heat exchanger, and the replacement section heat exchanger passes through The tube sheet is fixed to the skeleton, and the replacement section heat exchanger and the multi-stage heat exchanger perform the heat exchange function together; when the required cooling capacity/heating capacity is small, the windshield replaces the replacement section heat exchanger, and the windshield and the skeleton Fixed, the wind deflector and the multi-stage heat exchanger form a heat exchanger structure, the wind deflector plays the role of blocking the wind, and the cost of the wind deflector is much lower than the cost of the heat exchanger after a section of the hairpin tube is removed; Easy installation and maintenance, reducing labor maintenance costs. Moreover, the skeleton 6 has strong adaptability, and can be fixedly connected to the windshield and to the heat exchanger of the replacement section, that is, the skeleton can fix the heat exchanger structure of two kinds of cooling capacity/heating capacity, which reduces the cost; Two indoor units with cooling capacity/heating capacity can be produced on the same indoor unit production platform, which meets different cooling capacity and power requirements and reduces production costs.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art can still The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed in the present invention.

Claims (9)

1. a kind of indoor unit, including skeleton and heat exchanger structure, it is characterised in that: the heat exchanger structure includes multisection type heat exchange Device and wind deflector, the multisection type heat exchanger are fixed by tube sheet and skeleton, and the both ends of the wind deflector are provided with mounting ear Seat, is laid with two screw poles that limit fixed function is played to wind deflector on the skeleton, and the wind deflector passes through mounting ear Seat is fixed with skeleton；

Refrigerating capacity/heating capacity needed for obtaining indoor unit；

Whether refrigerating capacity/heating capacity needed for judgement is greater than the set value；

If so, wind deflector is replaced with one section of heat exchanger, this section of heat exchanger is fixed by tube sheet and skeleton.

2. indoor unit according to claim 1, it is characterised in that: the wind deflector is made of plastics.

3. indoor unit according to claim 1, it is characterised in that: the wind deflector is made of a foam material.

4. indoor unit according to claim 3, it is characterised in that: the wind deflector is pasted on skeleton.

5. indoor unit according to claim 1, it is characterised in that: the contact surface of the wind deflector and multisection type heat exchanger is It is ladder-like.

6. indoor unit according to claim 1, it is characterised in that: the upper end of the multisection type heat exchanger is embedded into wind deflector In.

7. indoor unit according to claim 1, it is characterised in that: laid between the wind deflector and multisection type heat exchanger There is PE liner.

8. indoor unit according to claim 1, it is characterised in that: the multisection type heat exchanger includes two sections of heat exchangers: the One section of heat exchanger and second segment heat exchanger, two sections of heat exchangers intersect and form an angle, the lower end of the first segment heat exchanger with Drip tray is fixed, and the upper end of the second segment heat exchanger is connected on wind deflector.

9. a kind of indoor unit refrigerating capacity/heating amount control method, it is characterised in that: the indoor unit includes skeleton and heat exchanger knot Structure, the heat exchanger structure include multisection type heat exchanger and wind deflector, and the multisection type heat exchanger is fixed by tube sheet and skeleton, The both ends of the wind deflector are provided with installation ear mount, is laid on the skeleton and the two of limit fixed function is risen to wind deflector A screw pole, the wind deflector are fixed by installation ear mount with skeleton；

The described method includes:

Refrigerating capacity/heating capacity needed for obtaining indoor unit；

Whether refrigerating capacity/heating capacity needed for judgement is greater than the set value；

If so, wind deflector is replaced with one section of heat exchanger, this section of heat exchanger is fixed by tube sheet and skeleton.