Air conditioner and control method

Abstract

The invention provides an air conditioner and a control method, the air conditioner comprises an air conditioner body and a fresh air assembly, a heat exchanger is arranged in the air conditioner body, an air outlet of the fresh air assembly communicates with an air channel of the air conditioner body, and gas output by the fresh air assembly flows through the heat exchanger and then is exhausted from the air conditioner body. According to the fresh air ventilator, the technical problem that in the prior art, a fresh air pre-cooling structure is additionally arranged, so that condensate water generated by the fresh air ventilator is recycled, and the cost of the fresh air ventilator is high can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner and a control method. Background Art

[0002] Air conditioners can only circulate indoor air in the process of adjusting indoor temperature, while air conditioners with fresh air modules can exchange indoor and outdoor air and refresh the air in time. In summer, when the fresh air module inhales fresh air, due to the low indoor temperature, the inhaled outdoor air contains a large number of water molecules. When the outdoor air contacts the low-temperature indoor air and the indoor temperature is lower than the dew point temperature, condensed water will be generated at the fresh air inlet and drip into the room, wetting the ground. The fresh air outlet is usually facing upward, and the generated condensed water will even flow back to the fan module. Long-term reflux will reduce the life of the fresh air fan.

[0003] Therefore, it is necessary to recycle the condensed water generated by the fresh air fan in time. In the prior art, for the fresh air system separated from the air conditioner, a fresh air pre-cooling structure is usually added inside the fresh air fan or between the fresh air fan and the air conditioner. The fresh air is cooled by the pre-cooling heat exchange component in the structure and then input into the room. Although this structure can prevent the generation of condensed water, it requires the addition of a heat exchanger and a refrigerant pipeline, which is large in size, complex in structure, and high in cost.

[0004] Since the fresh air fan in the prior art recovers the condensed water produced by the fresh air fan by adding a fresh air precooling structure, there are technical problems such as large size, complex structure and high cost of the fresh air fan. Therefore, the present invention studies and designs an air conditioner and a control method. Summary of the invention

[0005] Therefore, the present invention provides an air conditioner and a control method, which can solve the technical problem in the prior art that the fresh air fan increases the fresh air precooling structure to recycle the condensed water generated by the fresh air fan, resulting in high cost of the fresh air fan.

[0006] In order to solve the above problems, the present invention provides an air conditioner, comprising: an air conditioner body and a fresh air component, the air conditioner body is provided with a heat exchanger, the air outlet of the fresh air component is connected to the air duct of the air conditioner body, and the gas output by the fresh air component flows through the heat exchanger and is discharged from the air conditioner body.

[0007] In some embodiments, the air inlet of the fresh air component is connected to an air inlet pipe, and the air outlet of the fresh air component is connected to a diverter via a first connecting pipe, the diverter is connected to the air conditioner body via a second connecting pipe, the second connecting pipe is connected to the air duct in the air conditioner body, and, along the airflow direction in the air conditioner body, the second connecting pipe is located upstream of the heat exchanger.

[0008] In some embodiments, the diverter includes a first interface, a second interface and a third interface, the first interface is connected to the first connecting pipe, the first interface is connected to the second connecting pipe, and the third interface is used to deliver the gas output by the fresh air component into the room.

[0009] In some embodiments, the diverter includes a three-way assembly, the three-way assembly includes a valve body, the valve body has a hollow cavity structure, the first interface, the second interface and the third interface are arranged on the valve body, the first interface, the second interface and the third interface are connected to the hollow cavity structure, a valve core is arranged in the valve body, and the valve core has a first position that connects the first interface and the second interface, and a second position that connects the first interface and the third interface.

[0010] In some embodiments, the valve core has a first channel, a second channel and a third channel, one end of the first channel, one end of the second channel and one end of the third channel are located on the outer wall of the valve core, and the other end of the first channel, the other end of the second channel and the other end of the third channel are connected.

[0011] In some embodiments, the first interface, the second interface and the third interface are all provided with connectors, and the connectors at least partially extend into the valve body. A first seal is provided at one end of the connector of the first interface extending into the valve body, and a second seal is provided at one end of the connector of the second interface extending into the valve body. The first seal and the second seal are in conflict with the valve core.

[0012] In some embodiments, a mounting seat is provided on the valve body, a driving member is provided on the mounting seat, a driving shaft of the driving member penetrates the mounting seat and then extends into the valve body, and the driving shaft of the driving member is connected to the valve core.

[0013] In some embodiments, the valve body is a tubular structure, the second interface is located at one end of the valve body, the third interface is located at the other end of the valve body, the first interface is located at the side wall of the valve body, and the driving member is arranged opposite to the first interface.

[0014] The present invention also provides a control method for the above air conditioner, comprising the following steps:

[0015] Detection steps: Detect indoor CO 2 Concentration N;

[0016] Judgment steps, judge the indoor CO 2 Concentration N and preset CO 2 The relationship between concentration N1;

[0017] Control step: when N is less than N1, control the air conditioner body to turn on and the fresh air component to turn off; when N is not less than N1, control the fresh air component to turn on.

[0018] In some embodiments, when the diverter includes a first interface, a second interface, and a third interface, controlling the fresh air component to be turned on further includes the following steps:

[0019] Detection step, detecting the indoor temperature T2 and calculating the dew point temperature Td of the outdoor air;

[0020] A determination step, determining the relationship between the indoor temperature T2 and the dew point temperature Td of the outdoor air;

[0021] Control step: when the indoor temperature T2 is greater than the dew point temperature Td, control the first interface to be connected to the third interface; when the indoor temperature T2 is not greater than the dew point temperature Td, control the first interface to be connected to the second interface.

[0022] The air conditioner and control method provided by the present invention have the following beneficial effects:

[0023] The air outlet of the fresh air component is connected to the air duct of the air conditioner body. The gas output by the fresh air component flows through the heat exchanger and is discharged from the air conditioner body. When outdoor fresh air needs to be introduced indoors, the gas output from the fresh air component flows through the air conditioner body, mixes with the gas in the air conditioner body, and flows through the heat exchanger. Under the action of the heat exchanger, the water molecules in the fresh air are condensed, that is, the gas is cooled to produce condensed water, and the condensed water is discharged through the drainage device of the air conditioner body. This avoids the need for a fresh air pre-cooling structure in the fresh air module of the air conditioner to prevent the generation of condensed water, greatly reducing the volume of the air conditioner, simplifying the structure, and greatly reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0025] Figure 1 is a schematic structural diagram of an air conditioner of the present invention;

[0026] Figure 2 The structure of the flow divider in the air conditioner of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 3 is an exploded view of a flow divider in an air conditioner of the present invention;

[0028] Figure 4 The structure of the flow divider in the air conditioner of the present invention is shown in FIG. Figure 2 ;

[0029] Figure 5 The structure of the flow divider in the air conditioner of the present invention is shown in FIG. Figure 3 ;

[0030] Figure 6 is a flow chart of a method for controlling an air conditioner according to another embodiment of the present invention.

[0031] The accompanying drawings are marked as follows:

[0032] 1. Air inlet pipe; 2. Fresh air assembly; 3. Diverter; 4. Air conditioner body; 5. Three-way assembly; 6. Second connecting pipe; 7. First connecting pipe; 8. First sealing member; 9. Valve core; 10. Second sealing member; 11. Valve body; 12. Mounting seat; 13. Drive member; 14. Connector. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0035] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0037] See also Figure 1-6 As shown, according to an embodiment of the present invention, an air conditioner is provided, comprising: an air conditioner body 4 and a fresh air component 2, wherein the air conditioner body 4 has a heat exchanger, the air outlet of the fresh air component 2 is connected to the air duct of the air conditioner body 4, and the gas output by the fresh air component 2 flows through the heat exchanger and is discharged from the air conditioner body 4. In this technical solution, the air outlet of the fresh air component 2 is connected to the air duct of the air conditioner body 4, and the gas output by the fresh air component 2 flows through the heat exchanger and is discharged from the air conditioner body 4. When outdoor fresh air needs to be introduced indoors, the gas output from the fresh air component 2 flows through the air conditioner body 4, mixes with the gas in the air conditioner body 4, and flows through the heat exchanger. Under the action of the heat exchanger, the fresh air water molecules are condensed, that is, the gas is cooled to produce condensed water, and the condensed water is discharged through the drainage device provided by the air conditioner body 4. The air conditioner fresh air module avoids the need for a fresh air pre-cooling structure to prevent the generation of condensed water, so that the volume of the air conditioner is greatly reduced, the structure is simple, and the cost is greatly reduced.

[0038] In some embodiments, the air inlet of the fresh air component 2 is connected to the air inlet pipe 1, and the air outlet of the fresh air component 2 is connected to the diverter 3 through the first connecting pipe 7. The diverter 3 is connected to the air conditioner body 4 through the second connecting pipe 6. The second connecting pipe 6 is connected to the air duct in the air conditioner body 4, and the second connecting pipe 6 is located upstream of the heat exchanger along the air flow direction in the air conditioner body 4. In this technical solution, along the air flow direction in the air conditioner body 4, the second connecting pipe 6 is located upstream of the heat exchanger, so that the gas output from the fresh air component 2 flows through the air conditioner body 4, mixes with the gas in the air conditioner body 4, and flows through the heat exchanger. Under the action of the heat exchanger, the gas is cooled to produce condensed water, and the condensed water is discharged through the drainage device provided in the air conditioner body 4.

[0039] In some embodiments, the flow divider 3 includes a first interface, a second interface and a third interface, wherein the first interface is connected to the first connecting pipe 7, the first interface is connected to the second connecting pipe 6, and the third interface is used to deliver the gas output by the fresh air component 2 into the room. In this technical solution, the first interface is connected to the first connecting pipe 7, the first interface is connected to the second connecting pipe 6, and the third interface is used to deliver the gas output by the fresh air component 2 into the room. According to the indoor and outdoor environmental conditions, the direction of the fresh air can be freely selected, thereby improving the diversity of the air conditioner functions.

[0040] In some embodiments, the diverter 3 includes a three-way assembly 3, the three-way assembly 3 includes a valve body 11, the valve body 11 has a hollow cavity structure, the first interface, the second interface and the third interface are arranged on the valve body 11, the first interface, the second interface and the third interface are connected to the hollow cavity structure, and a valve core 9 is arranged in the valve body 11, the valve core 9 has a first position that connects the first interface and the second interface, and a second position that connects the first interface and the third interface. In this technical solution, the diversity of the direction of the fresh air is achieved through the valve core 9. Of course, the valve core 9 can also have a third position that makes the first interface not connected with the second interface and the third interface, so as to prevent the airflow in the air conditioner body 4 from flowing to the fresh air assembly 2, or to prevent the airflow in the fresh air assembly 2 from flowing to the air conditioner body 4, thereby improving the user experience.

[0041] In some embodiments, the valve core 9 has a first channel, a second channel and a third channel, one end of the first channel, one end of the second channel and one end of the third channel are located on the outer wall of the valve core 9, and the other end of the first channel, the other end of the second channel and the other end of the third channel are connected. In this technical solution, the valve core 9 has a first channel, a second channel and a third channel, one end of the first channel, one end of the second channel and one end of the third channel are located on the outer wall of the valve core 9, and the other end of the first channel, the other end of the second channel and the other end of the third channel are connected. The valve core 9 can adopt a spherical structure, which is more convenient for the rotation and adjustment of the valve core 9. That is to say, the valve core 9 is a hollow structure, and three openings are opened on the valve core 9. The three openings are all connected to the hollow structure. When the valve core 9 rotates, the communication between the various interfaces is realized. It should be noted that the closure of the openings on the valve core 9 is achieved by the interference between the openings and the inner wall of the valve body 11, thereby realizing the closure of any opening.

[0042] In some embodiments, the first interface, the second interface, and the third interface are all provided with a joint 14, and the joint 14 at least partially extends into the valve body 11. The end of the joint 14 of the first interface extending into the valve body 11 is provided with a first seal 8, and the end of the joint 14 of the second interface extending into the valve body 11 is provided with a second seal 10, and the first seal 8 and the second seal 10 conflict with the valve core 9. In this technical solution, preferably, a groove structure is provided in the valve body 11, and the groove structure is a spherical structure. The valve core 9 matches the groove structure, and the valve core 9 is provided in the groove structure. The end of the joint 14 of the second interface extending into the valve body 11 is provided with a second seal 10, and the first seal 8 and the second seal 10 conflict with the valve core 9, so that the first seal 8 and the second seal 10 not only play a sealing role, but also play a role in fixing and limiting the valve core 9.

[0043] In some embodiments, a mounting seat 12 is provided on the valve body 11, and a driving member 13 is provided on the mounting seat 12. The driving shaft of the driving member 13 penetrates the mounting seat 12 and then extends into the valve body 11, and the driving shaft of the driving member 13 is connected to the valve core 9. In this technical solution, the driving member is a motor, and the valve body 11 has a through hole for the motor main shaft to extend into. The driving shaft of the driving member 13 penetrates the mounting seat 12 and the through hole and then extends into the valve body 11. The valve core 9 is driven to rotate by the driving member, thereby realizing the communication relationship between the first interface, the second interface and the third interface.

[0044] In some embodiments, the valve body 11 is a tubular structure, the second interface is located at one end of the valve body 11, the third interface is located at the other end of the valve body 11, the first interface is located at the side wall of the valve body 11, and the drive 13 is arranged opposite to the first interface. In this technical solution, the valve body 11 is a tubular structure, the second interface is located at one end of the valve body 11, the third interface is located at the other end of the valve body 11, the first interface is located at the side wall of the valve body 11, and the drive 13 is arranged opposite to the first interface. In other words, the first interface and the drive 13 are symmetrically arranged about the central axis of the valve body 11, so as to realize the switching between the first interface and the second interface and the first interface and the third interface, and realize the diversity of fresh air supply.

[0045] The air conditioner of the present invention adds a diverter 3 between the fresh air outlet and the air conditioning inlet duct. The outlet of the diverter 3 is respectively connected to the air conditioning duct and the indoor environment. The direction of the fresh air can be changed by controlling the valve core 9 in the diverter 3: input into the air conditioner or indoors. There is no need to change the structure of the fresh air fan, and there is no need to add heat exchangers, fans and other mechanisms. The structure is simple.

[0046] The present invention also provides a control method for the above air conditioner, comprising the following steps:

[0047] Detection steps: Detect indoor CO 2 Concentration N;

[0048] Judgment steps, judge the indoor CO 2 Concentration N and preset CO 2 The relationship between concentration N1;

[0049] Control step: when N is less than N1, control the air conditioner body 4 to turn on and control the fresh air component 2 to turn off; when N is not less than N1, control the fresh air component 2 to turn on.

[0050] In this technical solution, when N is less than N1, the indoor environment is good and no fresh air input is required. The fresh air component 2 is controlled to be closed, and the valve core 9 is rotated to the third position to prevent the gas in the air conditioner main body 4 from flowing into the fresh air component 2 through the valve body 11, and the fresh air fan is turned off, and only the air conditioner works.

[0051] In some embodiments, when the diverter 3 includes a first interface, a second interface, and a third interface, controlling the fresh air component to be turned on further includes the following steps:

[0052] Detection step, detecting the indoor temperature T2 and calculating the dew point temperature Td of the outdoor air;

[0053] A determination step, determining the relationship between the indoor temperature T2 and the dew point temperature Td of the outdoor air;

[0054] Control step: when the indoor temperature T2 is greater than the dew point temperature Td, control the first interface to be connected to the third interface; when the indoor temperature T2 is not greater than the dew point temperature Td, control the first interface to be connected to the second interface.

[0055] In this technical solution, when the indoor temperature T2 is greater than the dew point temperature Td, the first interface is controlled to be connected to the third interface, and the air conditioner body 4 can also be turned off according to the indoor environment.

[0056] The calculation formula of dew point temperature Td is:

[0057] Among them, RH is the outdoor relative humidity and T1 is the outdoor temperature.

[0058] Determine whether the air is condensed by comparing the indoor temperature T2 with the dew point temperature Td.

[0059] When N≥N1, T2>Td: the indoor environment is poor, fresh air needs to be input, and the indoor temperature is higher than the dew point temperature, and no condensation water will be generated when the air enters the room. Open the fresh air component 2, control the valve core 9 to rotate, so that the first interface is connected with the third interface, and the air comes out of the fresh air component 2 and directly enters the room through the diverter 3. At this time, the efficiency of inputting fresh air is high.

[0060] When N≥N1 and T2≤Td: the indoor environment is poor and fresh air needs to be input. The indoor temperature is lower than the dew point temperature. When the air enters the room, condensation water will be generated. Fresh air cannot be directly discharged into the room. Turn on the fresh air blower, control the valve core 9 to rotate, so that the first interface is connected with the second interface, the connection channel between the diverter 3 and the air conditioner body 4 is opened, and the air comes out of the fresh air component 2 and passes through the diverter 3 into the air inlet chamber of the air conditioner body 4. It mixes with the internal air and is cooled by the evaporator to generate condensation water. The condensation water is discharged through the drainage device of the air conditioner. Since fresh air needs to be input through the air conditioner, the fresh air input efficiency is lower than that of directly inputting into the room.

[0061] The control method of the air conditioner of the present invention can realize cooling in summer by controlling the direction of the diverter 3 and guiding the fresh air through the air conditioner to realize the recovery of fresh air condensed water when the temperature difference between indoor and outdoor is large. When the fresh air does not produce condensed water, the fresh air is guided to enter the room directly from the outlet of the fresh air fan to improve the ventilation efficiency. In addition, the switch of the fresh air fan can be controlled according to the CO2 concentration.

[0062] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An air conditioner, characterized in that: include: An air conditioner body (4) and a fresh air component (2), wherein the air conditioner body (4) has a heat exchanger therein, the air outlet of the fresh air component (2) is connected to the air duct of the air conditioner body (4), and the gas output by the fresh air component (2) flows through the heat exchanger and is discharged from the air conditioner body (4).

2. The air conditioner according to claim 1, characterized in that: The air inlet of the fresh air component (2) is connected to an air inlet pipe (1), and the air outlet of the fresh air component (2) is connected to a diverter (3) via a first connecting pipe (7), and the diverter (3) is connected to the air conditioner body (4) via a second connecting pipe (6), and the second connecting pipe (6) is connected to the air duct in the air conditioner body (4), and along the air flow direction in the air conditioner body (4), the second connecting pipe (6) is located upstream of the heat exchanger.

3. The air conditioner according to claim 2, characterized in that: The flow divider (3) comprises a first interface, a second interface and a third interface, the first interface is connected to the first connecting pipe (7), the first interface is connected to the second connecting pipe (6), and the third interface is used to deliver the gas output by the fresh air component (2) into the room.

4. The air conditioner according to claim 3, characterized in that: The flow dividing member (3) comprises a three-way assembly (3), the three-way assembly (3) comprises a valve body (11), the valve body (11) has a hollow cavity structure, the first interface, the second interface and the third interface are arranged on the valve body (11), the first interface, the second interface and the third interface are connected to the hollow cavity structure, a valve core (9) is arranged in the valve body (11), and the valve core (9) has a first position for connecting the first interface and the second interface, and a second position for connecting the first interface and the third interface.

5. The air conditioner according to claim 4, characterized in that: The valve core (9) has a first channel, a second channel and a third channel, one end of the first channel, one end of the second channel and one end of the third channel are located on the outer wall of the valve core (9), and the other end of the first channel, the other end of the second channel and the other end of the third channel are connected.

6. The air conditioner according to claim 4, characterized in that: The first interface, the second interface and the third interface are all provided with a connector (14), and the connector (14) at least partially extends into the valve body (11). The end of the connector (14) of the first interface extending into the valve body (11) is provided with a first sealing member (8), and the end of the connector (14) of the second interface extending into the valve body (11) is provided with a second sealing member (10). The first sealing member (8) and the second sealing member (10) are in contact with the valve core (9).

7. The air conditioner according to claim 4, characterized in that: The valve body (11) is provided with a mounting seat (12), and a driving member (13) is provided on the mounting seat (12). A driving shaft of the driving member (13) penetrates through the mounting seat (12) and extends into the valve body (11), and the driving shaft of the driving member (13) is connected to the valve core (9).

8. The air conditioner according to claim 4, characterized in that: The valve body (11) is of a tubular structure, the second interface is located at one end of the valve body (11), the third interface is located at the other end of the valve body (11), the first interface is located on the side wall of the valve body (11), and the driving member (13) is arranged opposite to the first interface.

9. The air conditioner control method according to any one of claims 1 to 8, characterized in that: The following steps are involved: Detection steps: detect the CO2 concentration N in the room; A determination step, determining the relationship between the indoor CO2 concentration N and a preset CO2 concentration N1; The control step comprises: when N is less than N1, the air conditioner body (4) is controlled to be turned on and the fresh air component is turned off; and when N is not less than N1, the fresh air component (2) is controlled to be turned on.

10. The air conditioner control method according to claim 9, characterized in that: When the flow divider (3) comprises a first interface, a second interface and a third interface, controlling the fresh air component to be turned on also includes the following steps: Detection step, detecting the indoor temperature T2 and calculating the dew point temperature Td of the outdoor air; A determination step, determining the relationship between the indoor temperature T2 and the dew point temperature Td of the outdoor air; Control step: when the indoor temperature T2 is greater than the dew point temperature Td, control the first interface to be connected to the third interface; when the indoor temperature T2 is not greater than the dew point temperature Td, control the first interface to be connected to the second interface.

Images