A control method of a fresh air conditioner and the fresh air conditioner

Abstract

This invention provides a control method for a fresh air conditioning unit and a fresh air conditioning unit, comprising an indoor unit and a fresh air module; the fresh air module forms a fresh air flow path and a stale air flow path; a fresh air damper is provided at the inlet of the fresh air flow path, and a stale air damper is provided at the inlet of the stale air flow path; a heat exchange component is thermally coupled between the fresh air flow path and the stale air flow path; the control method includes: calculating T 外 and T 预设 The difference ΔT 外 And determine the current operating mode of the fresh air conditioning system, based on ΔT 外 The system determines the target fresh air volume and target stale air volume based on the current operating mode, and controls the fresh air damper and stale air damper to ensure that the fresh air conditioner operates at the target fresh air volume and target stale air volume. This matches the fresh air volume and stale air volume with the actual needs, improves the indoor air renewal speed, reduces the indoor air temperature change, and achieves energy saving while ensuring that the fresh air conditioner does not condense water dripping. It can also meet the user's fresh air needs to the greatest extent.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning equipment technology, and particularly relates to a control method for a fresh air conditioner and a fresh air conditioner. Background Technology

[0002] With the continuous development of the air conditioning industry, air conditioners with ventilation and fresh air blowing functions have been introduced to the market. The fresh air device of the air conditioner can bring fresh outdoor air into the room, and the exhaust device can filter the indoor stale air and discharge it to the outside, thus completing the replacement of indoor air with fresh air. After the outdoor fresh air and indoor exhaust air exchange heat through a heat exchanger, the temperature of the fresh air entering the room can be closer to the indoor temperature. In the existing technology, the control precision of the fresh air device and the exhaust device is low, and the fresh air volume and stale air volume are not matched with the actual needs. Either the fresh air volume and stale air volume are insufficient, and the indoor air renewal speed is slow, or the fresh air volume and stale air volume are too large, and the indoor air temperature fluctuates greatly. It is impossible to simultaneously take into account the indoor air comfort and the energy saving of the air conditioner. Summary of the Invention

[0003] In view of this, the present invention provides a control method and a fresh air conditioner to solve the problems in the prior art where the fresh air volume and stale air volume are not matched with the actual needs, resulting in slow indoor air renewal or large indoor air temperature changes, and the inability to simultaneously take into account indoor air comfort and air conditioning energy saving.

[0004] This invention provides a control method for a fresh air conditioning unit, comprising an indoor unit, the indoor unit including a main body and a fresh air module that can be controlled to operate simultaneously; the fresh air module forming a fresh air flow path and a stale air flow path; the fresh air flow path forming a fresh air inlet communicating with the outside and a fresh air outlet communicating with the inside, the fresh air inlet being provided with a fresh air damper; the stale air flow path forming a stale air inlet communicating with the inside and a stale air outlet communicating with the outside, the stale air inlet being provided with a stale air damper; a heat exchanger is thermally coupled between the fresh air flow path and the stale air flow path, the heat exchanger being used to realize heat exchange between the fresh air flow path and the stale air flow path; the control method includes:

[0005] Calculate T 外 and T 预设 The difference ΔT 外 And determine the current operating mode of the fresh air conditioner;

[0006] According to the ΔT 外 Determine the target fresh air volume and target stale air volume based on the current operating mode;

[0007] Control the fresh air damper and the stale air damper to make the fresh air air conditioner operate at the target fresh air volume and the target stale air volume;

[0008] Wherein, the T 外 The current outdoor air temperature, T 预设 The preset temperature for indoor users, ΔT 外 =T 外 -T 预设 The current operating mode is either heating mode or cooling mode.

[0009] Further optionally, the step based on the ΔT 外 Determining the target fresh air volume and target stale air volume based on the current operating mode includes:

[0010] When the preset time period ΔT 外 Within the preset interval I 外 When the target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, the target stale air volume is determined to be the maximum stale air volume of the fresh air conditioner;

[0011] When the preset time period ΔT 外 Not in the preset interval I 外 When, calculate T 出 and T 预设 The difference ΔT 出 And according to the ΔT 出 Determine the target fresh air volume and target stale air volume, or calculate T. 内 and T 预设 The difference ΔT 内 And according to the ΔT 内 Determine the target fresh air volume and the target stale air volume;

[0012] Wherein, the I 外 =[-T 外1 T 外1 The T 出 The current temperature of the air at the outlet of the fresh air flow path, ΔT 出 =T 出 -T 预设 The T 内 The current temperature of the indoor air, ΔT 内 =T 内 -T 预设 .

[0013] Further optionally, when the current operating mode is cooling mode, the step of... 出 or ΔT 内 Determining the target fresh air volume and target stale air volume includes:

[0014] When the preset time period ΔT 外 Greater than I 外 When the maximum threshold is reached, the ΔT is determined. 出 The preset interval I出 And according to the I 出 Determine the target fresh air volume and the target stale air volume;

[0015] When the preset time period ΔT 外 Less than I 外 When the minimum threshold is reached, the ΔT is determined. 内 The preset interval I 内 And according to the I 内 Determine the target fresh air volume and the target stale air volume.

[0016] Further optionally, the I 出 Including I 出1 I 出2 I 出3 , and I 出4 According to the I 出 Determining the target fresh air volume and target stale air volume includes:

[0017] The ΔT 出 In the I 出1 When the target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, the target stale air volume is determined to be the maximum stale air volume of the fresh air conditioner;

[0018] The ΔT 出 In the I 出2 At that time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 2 / 3 of the maximum stale air volume of the fresh air conditioner;

[0019] The ΔT 出 In the I 出3 At that time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 1 / 3 of the maximum stale air volume of the fresh air conditioner;

[0020] The ΔT 出 In the I 出4 At that time, both the target fresh air volume and the target stale air volume are zero;

[0021] Wherein, the I 出1 =(-∞, T) 出1 The I 出2 =(T 出1 T 出2 The I 出3 =(T 出2 T 出3 The I 出4 =(T 出3 (+∞).

[0022] Further optionally, the I 内Including I 内1 I 内2 and I 内3 According to the I 内 Determining the target fresh air volume and target stale air volume includes:

[0023] The ΔT 内 In the I 内1 At that time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 1 / 3 of the maximum stale air volume of the fresh air conditioner;

[0024] The ΔT 内 In the I 内2 At that time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 2 / 3 of the maximum stale air volume of the fresh air conditioner;

[0025] The ΔT 内 In the I 内3 At that time, the target fresh air volume is the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is the maximum stale air volume of the fresh air conditioner;

[0026] Wherein, the I 内1 =(-∞, T) 内1 ), the I 内2 =[T 内1 T 内2 The I 内3 =(T 内2 (+∞).

[0027] Further optionally, when the current operating mode is heating mode, the step of... based on ΔT 出 or ΔT 内 Determining the target fresh air volume and target stale air volume includes:

[0028] When the preset time period ΔT 外 Less than I 外 When the minimum threshold is reached, the ΔT is determined. 出 The preset interval I' 出 And according to the I' 出 Determine the target fresh air volume and the target stale air volume;

[0029] When the preset time period ΔT 外 Greater than I 外 When the maximum threshold is reached, the ΔT is determined. 内 The preset interval I' 内 And according to the I' 内 Determine the target fresh air volume and the target stale air volume.

[0030] Further, optionally, the I'出 Including I' 出1 、I' 出2 、I' 出3 and I' 出4 The statement based on the I' 出 Determining the target fresh air volume and target stale air volume includes:

[0031] The ΔT 出 In the I' 出1 At that time, both the target fresh air volume and the target stale air volume are zero;

[0032] The ΔT 出 In the I' 出2 At that time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 1 / 3 of the maximum stale air volume of the fresh air conditioner;

[0033] The ΔT 出 In the I' 出3 At that time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 2 / 3 of the maximum stale air volume of the fresh air conditioner;

[0034] The ΔT 出 In the I' 出1 When the target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, the target stale air volume is determined to be the maximum stale air volume of the fresh air conditioner;

[0035] Wherein, the I' 出1 =(-∞, T') 出3 ), the I' 出2 =[T' 出3 T' 出2 ), the I' 出3 =[T' 出2 T' 出1 ), the I' 出4 =[T' 出1 (+∞).

[0036] Further, optionally, the I' 内 Including I' 内1 、I' 内2 and I' 内3 The statement based on the I' 内 Determining the target fresh air volume and target stale air volume includes:

[0037] The ΔT 内 In the I' 内1 At that time, the target fresh air volume is the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is the maximum stale air volume of the fresh air conditioner;

[0038] The ΔT 内 In the I' 内2 At that time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 2 / 3 of the maximum stale air volume of the fresh air conditioner;

[0039] The ΔT 内 In the I' 内3 At that time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 1 / 3 of the maximum stale air volume of the fresh air conditioner;

[0040] Wherein, the I' 内1 =(-∞, T') 内1 ), the I' 内2 =[T' 内1 T' 内2 ], the I' 内3 =(T' 内2 (+∞).

[0041] Further optionally, the fresh air conditioner is equipped with a dehumidification mode. When the current operating mode is dehumidification mode, the control method further includes:

[0042] Calculate H 内 and H 外 The difference ΔH is determined and the preset interval I in which ΔH is located is determined. 湿 ;

[0043] According to the preset interval I where ΔH is located 湿 Determine the target fresh air volume and the target stale air volume;

[0044] Control the fresh air damper and the stale air damper to make the fresh air air conditioner operate at the target fresh air volume and the target stale air volume;

[0045] Wherein, the H 内 The current relative humidity of the indoor air, H 外 The current relative humidity of the outdoor air is given by ΔH = H. 内 -H 外 .

[0046] Further optionally, the I 湿 Including I 湿1 I 湿2 I 湿3 , and I 湿4 The preset interval I based on the location of ΔH 湿 Determining the target fresh air volume and target stale air volume includes:

[0047] The ΔH is in the I 湿1At that time, both the target fresh air volume and the target stale air volume are zero;

[0048] The ΔH is in the I 湿2 At that time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 1 / 3 of the maximum stale air volume of the fresh air conditioner;

[0049] The ΔH is in the I 湿3 At that time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 2 / 3 of the maximum stale air volume of the fresh air conditioner;

[0050] The ΔH is in the I 湿4 When the target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, the target stale air volume is determined to be the maximum stale air volume of the fresh air conditioner;

[0051] Wherein, the I 湿1 =(-∞, H) 湿1 ), the I 湿2 =[H 湿1 H 湿2 ), the I 湿3 =[H 湿2 H 湿3 ), the I 湿4 =[H 湿3 (+∞).

[0052] The present invention also provides a fresh air conditioner, which employs the control method of the fresh air conditioner described in any of the above claims.

[0053] Compared with the prior art, the main advantages of the present invention are as follows:

[0054] Based on the difference between the outdoor air temperature and the user's preset indoor temperature, as well as the current operating mode, the target fresh air volume and target stale air volume are determined. The fresh air damper and stale air damper are then controlled to ensure that the air conditioner operates at the target fresh air volume and target stale air volume. This matches the fresh air volume and stale air volume with the actual needs, improving the indoor air renewal speed, reducing indoor air temperature fluctuations, and balancing indoor air comfort with energy saving. It also improves the control precision of the operating mode, expands the application range of the air conditioner, and can meet the different fresh air needs of users. Attached Figure Description

[0055] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0056] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0057] Figure 1 This is a schematic flowchart of an embodiment of the control method for a fresh air conditioner provided by the present invention;

[0058] Figure 2 This is a schematic diagram of the structure of an indoor unit embodiment provided by the present invention;

[0059] Figure 3a This is an exploded structural diagram of an embodiment of the fresh air module provided by the present invention;

[0060] Figure 3b This is a schematic diagram of the assembly structure of an embodiment of the fresh air module (without a face mask) provided by the present invention;

[0061] Figure 4 This is an exploded structural diagram of an embodiment of the fresh air component provided by the present invention;

[0062] Figure 5 This is an exploded structural diagram of an embodiment of the turbid air component provided by the present invention;

[0063] Figure 6 This is a schematic diagram of an embodiment of the outdoor fresh air flow path in the fresh air module provided by the present invention;

[0064] Figure 7 This is a schematic diagram of an embodiment of the indoor stale air flow path in the fresh air module provided by the present invention;

[0065] Figure 8 A schematic diagram of the structure of the base embodiment provided by the present invention;

[0066] Figure 9a This is a schematic diagram showing the location of the fresh air damper embodiment provided by the present invention;

[0067] Figure 9b This is a schematic diagram showing the location of the turbid air damper embodiment provided by the present invention;

[0068] Figure 10 This is a schematic flowchart of an embodiment of the present invention when the fresh air conditioner is in cooling mode;

[0069] Figure 11 This is a schematic diagram of the process of an embodiment of the present invention when the fresh air conditioner is in heating mode;

[0070] Figure 12 This is a schematic diagram of the process of an embodiment of the present invention when the fresh air conditioner is in dehumidification mode;

[0071] In the picture:

[0072] 1-Base; 11-Base body; 111-Base air duct; 12-Base plate; 131-Fresh air inlet duct; 132-Stale air exhaust duct; 141-First frame; 142-Second frame; 151-First partition; 152-Second partition; 16-Fresh air inlet cavity; 17-Stale air connecting cavity; 181-Fresh air damper; 182-First rotating shaft; 183-Fresh air inlet; 191-Fresh air damper; 192-Second rotating shaft; 193-Stale air inlet;

[0073] 21-Heat exchange component; 211-Fresh air heat exchange duct; 212-Stale air heat exchange duct; 22-Filter; 23-Electrical box; 24-Wall mounting plate;

[0074] 31-Fresh air assembly; 311-Fresh air volute; 312-Fresh air volute cover; 313-Fresh air fan blade; 314-Fresh air cavity; 32-Dull air assembly; 321-Dull air volute; 322-Dull air volute cover; 323-Dull air fan blade; 324-Dull air cavity; 33-Drive motor; 331-First shaft end; 332-Second shaft end;

[0075] 4 - Face mask; 41 - Face mask inlet; 42 - Face mask outlet;

[0076] 5-Fresh air module; 6-Indoor unit body. Detailed Implementation

[0077] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0078] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0079] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0080] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0081] In existing air conditioners with fresh air function, the control precision of the fresh air device and the exhaust device is low. The fresh air volume and the stale air volume are not matched with the actual needs. Either the fresh air volume and the stale air volume are insufficient, and the indoor air renewal speed is slow, or the fresh air volume and the stale air volume are too large, and the indoor air temperature changes greatly. It is impossible to simultaneously take into account the comfort of indoor air and the energy saving of air conditioner.

[0082] This invention creatively provides a control method for a fresh air conditioning unit, which includes an indoor unit and a fresh air module. The fresh air module forms a fresh air flow path and a stale air flow path. A fresh air damper is provided at the inlet of the fresh air flow path, and a stale air damper is provided at the inlet of the stale air flow path. A heat exchange component is thermally coupled between the fresh air flow path and the stale air flow path. The control method includes: calculating T... 外 and T 预设 The difference ΔT 外 And determine the current operating mode of the fresh air conditioning system, based on ΔT 外 Determine the target fresh air volume and target stale air volume based on the current operating mode, and control the fresh air damper and stale air damper to make the fresh air air conditioner operate at the target fresh air volume and target stale air volume;

[0083] By matching the fresh air volume and stale air volume with actual needs, the indoor air renewal speed is improved, the indoor air temperature change is reduced, and energy saving is achieved while ensuring that the fresh air air conditioner does not produce condensation or dripping water. At the same time, it can meet the user's fresh air needs to the greatest extent.

[0084] Example 1

[0085] <Control Methods>

[0086] like Figure 1As shown, this embodiment provides a control method for a fresh air conditioning unit. The fresh air conditioning unit includes an indoor unit, which includes an indoor unit body 6 and a fresh air module 5 that can be controlled to operate simultaneously. The fresh air module 5 forms a fresh air flow path and a stale air flow path. The fresh air flow path has a fresh air inlet connected to the outside and a fresh air outlet connected to the inside, and a fresh air damper 181 is provided at the fresh air inlet. The stale air flow path has a stale air inlet connected to the inside and a stale air outlet connected to the outside, and a stale air damper 191 is provided at the stale air inlet. The fresh air flow path and the stale air flow path... A heat exchanger 21 is thermally coupled between the fresh air flow path and the stale air flow path to achieve heat exchange. Temperature sensors are installed both indoors and outdoors to detect the indoor air temperature and the outdoor air temperature, respectively. A temperature sensor is installed at the outlet of the fresh air flow path to detect the air temperature at the outlet of the fresh air flow path. Specifically, the fresh air damper 181 is rotatably installed at the inlet of the fresh air flow path via a first rotating shaft 182; the stale air damper 191 is rotatably installed at the inlet of the stale air flow path via a second rotating shaft 192; the heat exchanger 21 is a total heat exchanger.

[0087] Control methods include:

[0088] S1, Calculate T 外 and T 预设 The difference ΔT 外 And determine the current operating mode of the fresh air conditioning system;

[0089] S2, according to ΔT 外 Determine the target fresh air volume and target stale air volume based on the current operating mode;

[0090] S3. Control the fresh air damper 181 and the turbid air damper 191 to make the fresh air air conditioner operate with the target fresh air volume and the target turbid air volume.

[0091] Among them, T 外 T represents the current outdoor air temperature. 预设 Preset temperature for indoor users, ΔT 外 =T 外 -T 预设 The current operating mode is either heating or cooling.

[0092] Based on the difference between the outdoor air temperature and the user's preset indoor temperature, as well as the current operating mode, the target fresh air volume and target stale air volume are determined. The fresh air damper 181 and the stale air damper 191 are controlled to ensure that the air conditioner operates at the target fresh air volume and target stale air volume. This matches the fresh air volume and stale air volume with the actual needs, improving the indoor air renewal speed, reducing indoor air temperature fluctuations, and balancing indoor air comfort with energy saving. It also improves the control precision of the operating mode, expands the application range of the air conditioner, and can meet different user fresh air needs. While combining energy saving, it maximizes the fresh air volume, satisfying the user's fresh air demand to the greatest extent.

[0093] For ΔT 外 When the target fresh air volume and target stale air volume are large, there is a mismatch between them and the actual needs. This embodiment proposes a control approach: If the outdoor air temperature is close to the user-set temperature, then the fresh air outlet and stale air inlet are fully open, maximizing the fresh air volume; if the outdoor air temperature is higher than the set temperature in cooling mode, comfort (temperature) is prioritized, followed by air quality (fresh air volume); if the outdoor air temperature is lower than the set temperature in cooling mode, outdoor air is fully utilized as a cold source; if the outdoor air temperature is higher than the set temperature in heating mode, outdoor air is fully utilized as a heat source; if the outdoor air temperature is lower than the set temperature in heating mode, comfort (temperature) is prioritized, followed by air quality (fresh air volume).

[0094] Specifically, S2 includes:

[0095] S21, when the preset time ΔT 外 Within the preset interval I 外 When the outdoor air temperature is close to the set temperature, the large amount of fresh air entering will not cause an increase in energy consumption; the target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is the maximum turbid air volume of the fresh air conditioner. The fresh air damper 181 and the turbid air damper 191 are both in position 1, and the fresh air inlet and the turbid air inlet are fully open.

[0096] S22, when the preset time ΔT 外 Not in the preset interval I 外 When, calculate T 出 and T 预设 The difference ΔT 出 And according to ΔT 出 Determine the target fresh air volume and target stale air volume, or calculate T. 内 and T 预设 The difference ΔT 内 And according to ΔT 内 Determine the target fresh air volume and the target stale air volume;

[0097] Among them, I外 =[-T 外1 T 外1 ], T 出 ΔT represents the current temperature of the air at the outlet of the fresh air flow path. 出 =T 出 -T 预设 ;T 内 ΔT represents the current temperature of the indoor air. 内 =T 内 -T 预设 Preferred, T 外1 =1℃.

[0098] This implementation determines the target fresh air volume and target stale air volume separately based on the different current operating modes:

[0099] First, when the current operating mode is cooling mode, according to ΔT 出 or ΔT 内 Determining the target fresh air volume and target stale air volume includes:

[0100] S221, When the preset time ΔT 外 Greater than I 外 When the maximum threshold is reached, it indicates that the outdoor air temperature is relatively high, and further determination of ΔT is needed. 出 The preset interval I 出 And according to I 出 Determine the target fresh air volume and the target stale air volume;

[0101] S222, when the preset time ΔT 外 Less than I 外 When the minimum threshold is reached, it indicates that the outdoor air temperature is low, and outdoor air can be appropriately used as a cold source to further determine ΔT. 内 The preset interval I 内 And according to I 内 Determine the target fresh air volume and the target stale air volume.

[0102] Specifically, ①I 出 Including I 出1 I 出2 I 出3 , and I 出4 S221 includes:

[0103] S2211、ΔT 出 In I 出1 When the fresh air passes through the heat exchanger and is cooled, the temperature can be reduced to an acceptable range. The target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is determined to be the maximum turbid air volume of the fresh air conditioner. The fresh air damper 181 and the turbid air damper 191 are both in position 1, and the fresh air inlet and the turbid air inlet are fully open.

[0104] S2212、ΔT 出 In I 出2 At this time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is 2 / 3 of the maximum turbid air volume of the fresh air conditioner; the fresh air damper 181 and the turbid air damper 191 are both in position 2, and the fresh air inlet and the turbid air inlet are slightly closed.

[0105] S2213、ΔT 出 In I 出3 At this time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is 1 / 3 of the maximum turbid air volume of the fresh air conditioner; the fresh air damper 181 and the turbid air damper 191 are both in position 3, and the fresh air inlet and the turbid air inlet are further closed.

[0106] S2214、ΔT 出 In I 出4 At this time, both the target fresh air volume and the target stale air volume are zero; the control fresh air damper 181 and the stale air damper 191 are both in position 4, and the fresh air inlet and the stale air inlet are completely closed;

[0107] Among them, I 出1 =(-∞, T) 出1 ], I 出2 =(T 出1 T 出2 ], I 出3 =(T 出2 T 出3 ], I 出4 =(T 出3 (+∞); preferred, T 出1 =1℃, T 出2 =2℃, T 出3 =3℃.

[0108] ②I 内 Including I 内1 I 内2 and I 内3 S222 includes:

[0109] S2221、ΔT 内 In I 内1 When the indoor air temperature is relatively low, fresh air can be introduced at a small volume as a cold source; the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is 1 / 3 of the maximum turbid air volume of the fresh air conditioner; control the fresh air damper 181 and the turbid air damper 191 to be in position 1, and the fresh air inlet and the turbid air inlet are slightly open.

[0110] S2222、ΔT 内 In I 内2When the indoor air temperature is within the comfortable range, fresh air can be introduced at a moderate volume as a cold source to maintain the existing balance. The target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is 2 / 3 of the maximum turbid air volume of the fresh air conditioner. The fresh air damper 181 and the turbid air damper 191 are both in position 1, and the fresh air inlet and the turbid air inlet are further opened.

[0111] S2223、ΔT 内 In I 内3 When the indoor air temperature is relatively high, the fresh air needs to be introduced in large volume as a cold source to reduce the indoor air temperature; the target fresh air volume is the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is the maximum turbid air volume of the fresh air conditioner; the fresh air damper 181 and the turbid air damper 191 are both in position 1, and the fresh air inlet and the turbid air inlet are fully open.

[0112] Among them, I 内1 =(-∞, T) 内1 ), I 内2 =[T 内1 T 内2 ], I 内3 =(T 内2 (+∞); preferred, T 内1 = -1℃, T 内2 =1℃; preset time is 30s.

[0113] Second, when the current operating mode is heating mode, according to ΔT 出 or ΔT 内 Determining the target fresh air volume and target stale air volume includes:

[0114] S223, when the preset time ΔT 外 Less than I 外 When the minimum threshold is reached, it indicates that the outdoor air temperature is low, and further determination of ΔT is needed. 出 The preset interval I' 出 And according to I' 出 Determine the target fresh air volume and the target stale air volume;

[0115] S224, When the preset time ΔT 外 Greater than I 外 When the maximum threshold is reached, it indicates that the outdoor air temperature is relatively high, and outdoor air can be appropriately used as a heat source to further determine ΔT. 内 The preset interval I' 内 And according to I' 内 Determine the target fresh air volume and the target stale air volume.

[0116] Specifically, ①I' 出 Including I' 出1 、I'出2 、I' 出3 and I' 出4 S223 includes:

[0117] ΔT 出 In I' 出1 At this time, both the target fresh air volume and the target stale air volume are zero; the control fresh air damper 181 and the stale air damper 191 are both in position 4, and the fresh air inlet and the stale air inlet are completely closed;

[0118] ΔT 出 In I' 出2 At this time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is 1 / 3 of the maximum turbid air volume of the fresh air conditioner; the fresh air damper 181 and the turbid air damper 191 are both in position 3, and the fresh air inlet and the turbid air inlet are slightly open.

[0119] ΔT 出 In I' 出3 At this time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is 2 / 3 of the maximum turbid air volume of the fresh air conditioner; the fresh air damper 181 and the turbid air damper 191 are both in position 2, and the fresh air inlet and the turbid air inlet are further opened.

[0120] ΔT 出 In I' 出1 When the fresh air passes through the heat exchanger and is cooled, the temperature can be reduced to an acceptable range. The target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is determined to be the maximum turbid air volume of the fresh air conditioner. The fresh air damper 181 and the turbid air damper 191 are both in position 1, and the fresh air inlet and the turbid air inlet are fully open.

[0121] Among them, I' 出1 =(-∞, T') 出3 ), I' 出2 =[T' 出3 T' 出2 ), I' 出3 =[T' 出2 T' 出1 ), I' 出4 =[T' 出1 (+∞); preferred, T' 出3 =1℃, T' 出2 =2℃, T' 出1 =3℃.

[0122] ②I' 内 Including I' 内1 、I' 内2 and I' 内3 S224 includes:

[0123] ΔT 内 In I' 内1 When the indoor air temperature is relatively low, the fresh air needs to be introduced in large volume as a cold source to raise the indoor air temperature; the target fresh air volume is the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is the maximum turbid air volume of the fresh air conditioner; the fresh air damper 181 and the turbid air damper 191 are both in position 1, and the fresh air inlet and the turbid air inlet are fully open.

[0124] ΔT 内 In I' 内2 When the indoor air temperature is within the comfortable range, fresh air can be introduced at a moderate volume as a cold source to maintain the existing balance. The target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is 2 / 3 of the maximum turbid air volume of the fresh air conditioner. The fresh air damper 181 and the turbid air damper 191 are both in position 2, and the fresh air inlet and the turbid air inlet are slightly closed.

[0125] ΔT 内 In I' 内3 When the indoor air temperature is relatively high, fresh air can be introduced at a small volume as a cold source; the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is 1 / 3 of the maximum turbid air volume of the fresh air conditioner; control the fresh air damper 181 and the turbid air damper 191 to be in position 2, and further close the fresh air flow path inlet and the turbid air flow path inlet;

[0126] Among them, I' 内1 =(-∞, T') 内1 ), I' 内2 =[T' 内1 T' 内2 ], I' 内3 =(T' 内2 (+∞); preferred, T' 内1 = -1℃, T' 内2 =1℃; preset time is 30s.

[0127] To address the issue that the humidity of the fresh air significantly affects the humidity of the indoor air during fresh air intake, this embodiment proposes that the fresh air conditioner have a dehumidification mode. When the current operating mode is dehumidification mode, the control method further includes:

[0128] S4, Calculate H 内 and H 外 The difference ΔH and the predetermined interval I in which ΔH is located are determined. 湿 ;

[0129] S5. Based on the preset interval I where ΔH is located. 湿 Determine the target fresh air volume and the target stale air volume;

[0130] S6. Control the fresh air damper 181 and the turbid air damper 191 to make the fresh air air conditioner operate with the target fresh air volume and the target turbid air volume.

[0131] A larger ΔH indicates that the indoor air is more humid and the outdoor air is drier; turning on the dehumidification mode introduces relatively dry outdoor fresh air to reduce the humidity of the indoor air; the larger the ΔH, the larger the target fresh air volume and the target stale air volume.

[0132] Among them, H 内 H represents the current relative humidity of the indoor air. 外 The current relative humidity of the outdoor air is ΔH = H. 内 -H 外 .

[0133] Furthermore, I 湿 Including I 湿1 I 湿2 I 湿3 , and I 湿4 S5 includes:

[0134] S51, When ΔH is within the preset time period, I 湿1 When the relative humidity of the indoor air is lower than that of the outdoor air, it means that the outdoor air is more humid. The introduction of fresh air will seriously affect the humidity of the indoor air. The target fresh air volume and the target turbid air volume are both zero. The fresh air damper 181 and the turbid air damper 191 are both in position 4, and the fresh air flow path inlet and the turbid air flow path inlet are completely closed.

[0135] S52, When ΔH is within the preset time period, I 湿2 This indicates that the relative humidity of the indoor air is slightly higher than that of the outdoor air, and the outdoor air is slightly drier than the indoor air. The target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is 1 / 3 of the maximum turbid air volume of the fresh air conditioner. While taking into account energy saving and ensuring indoor air quality, both the fresh air damper 181 and the turbid air damper 191 are controlled to be in position 3, and the fresh air inlet and the turbid air inlet are slightly opened.

[0136] S53, When ΔH is in I within the preset time period 湿3 This indicates that the relative humidity of the indoor air is slightly higher than that of the outdoor air, while the outdoor air is relatively dry. The introduction of fresh air will slightly increase the humidity of the indoor air. The target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is 2 / 3 of the maximum turbid air volume of the fresh air conditioner. While taking into account energy saving and ensuring indoor air quality, both the fresh air damper 181 and the turbid air damper 191 are controlled to be in position 2, and the fresh air inlet and the turbid air inlet are further opened.

[0137] S54. When ΔH is within the preset time period, I 湿4This indicates that the relative humidity of the indoor air is much higher than that of the outdoor air, meaning that the outdoor air is relatively dry. The introduction of fresh air will not significantly increase the humidity of the indoor air. The target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, and the target turbid air volume is determined to be the maximum turbid air volume of the fresh air conditioner. While ensuring air quality, both the fresh air damper 181 and the turbid air damper 191 are controlled to position 1, with both the fresh air inlet and the turbid air inlet fully open.

[0138] Among them, I 湿1 =(-∞, H) 湿1 ), I 湿2 =[H 湿1 H 湿2 ), I 湿3 =[H 湿2 H 湿3 ), I 湿4 =[H 湿3 (+∞); preferred, H 湿1 =10%, H 湿2 =20%, H 湿3 =30%, preset time is 30s.

[0139] <Fresh Air Conditioner>

[0140] like Figures 2 to 9b As shown, this embodiment discloses a fresh air conditioner, which includes an outdoor unit and an indoor unit. The indoor unit has a split structure and includes an indoor unit body 6 that can be spliced ​​together and a fresh air module 5. The fresh air module 5 forms a base air duct 111, a fresh air cavity 314, and a stale air cavity 324. The air inlet end of the base air duct 111 is connected to the outside, and the air outlet end of the base air duct 111 is connected to the fresh air cavity 314. A heat exchange component 21 is provided inside the base air duct 111, and the heat exchange component 21 forms a fresh air heat exchange channel 211 and a stale air heat exchange channel 212. Both ends of the fresh air heat exchange channel 211 are connected to the base air duct 111. The fresh air cavity 314 connects the air outlet end of the base air duct 111 to the indoor unit, and the stale air cavity 324 connects the air outlet end of the stale air heat exchange channel 212 to the outside.

[0141] Outdoor fresh air enters the base air duct 111 through the air inlet and is discharged into the room through the fresh air heat exchange duct 211 and the fresh air cavity 314. Indoor stale air enters the stale air heat exchange duct 212 through the air inlet and is discharged into the outside through the stale air cavity 324. The fresh air module 5 can independently complete the introduction of outdoor fresh air, the discharge of indoor stale air, and the heat exchange between the fresh air flowing through the fresh air heat exchange duct 211 and the stale air flowing through the stale air heat exchange duct 212, which is separate from the indoor unit body 6. The structure of the base air duct 111 has been optimized, and the heat exchange component 21 is placed in a suitable position to make the heat exchange time between indoor stale air and outdoor fresh air longer, so that the temperature distribution of the fresh air after heat exchange is uniform and the heat exchange effect is obvious. This improves the energy utilization rate of indoor stale air and solves the problems of uneven temperature distribution of fresh air after heat exchange, insignificant heat exchange effect, and energy waste of indoor stale air.

[0142] To address the issue of excessive space occupation caused by the unreasonable placement of components in the fresh air module 5, this embodiment proposes that the fresh air module 5 includes a base 1 and a fan assembly; the base 1 includes a base body 11, which forms a base air duct 111; the fan assembly provides flow power for the fresh air in the fresh air flow path and the return air in the return air flow path, respectively or simultaneously; preferably, the fan assembly includes a reverse double-suction centrifugal fan; specifically, the fan assembly includes a fresh air assembly 31 and a stale air assembly 32, with the fresh air assembly 31 and the stale air assembly 32 arranged side by side at the bottom of the base body 11, the fresh air assembly 31 forming a fresh air cavity 314, and the stale air assembly 32 forming a stale air cavity 324; the structure is compact and the space utilization rate is high;

[0143] Furthermore, the fresh air assembly 31 includes a fresh air volute 311 and a fresh air volute cover 312, which are fastened together to form a fresh air cavity 314. The fresh air cavity 314 includes a fresh air cavity inlet and a fresh air cavity outlet. The fresh air cavity inlet is formed at the top of the fresh air cavity 314 and communicates with the air outlet end of the base air duct 111. The fresh air cavity outlet is formed at the bottom of the fresh air cavity 314 and communicates with the indoor environment.

[0144] The turbid air assembly 32 includes a turbid air volute 321 and a turbid air volute cover 322. The turbid air volute 321 and the turbid air volute cover 322 are fastened together to form a turbid air cavity 324. The turbid air cavity 324 includes a turbid air cavity inlet and a turbid air cavity outlet. The turbid air cavity inlet is formed at the top of the turbid air cavity 324 and is connected to the air outlet end of the turbid air heat exchange channel 212. The turbid air cavity outlet is formed on the side of the turbid air cavity 324 and is connected to the outside.

[0145] Specifically, a fresh air inlet is formed at the top of the fresh air volute 311; a first sub-fresh air outlet is formed at the bottom of the fresh air volute 311, and a second sub-fresh air outlet is formed at the bottom of the fresh air volute cover 312; when the fresh air volute 311 and the fresh air volute cover 312 are fastened together, the first sub-fresh air outlet and the second sub-fresh air outlet constitute the fresh air outlet; allowing outdoor fresh air to smoothly enter the fresh air cavity 314 through the base air duct 111 and the fresh air inlet, and smoothly exhaust into the room through the fresh air outlet;

[0146] The top of the turbid air volute 321 has a first sub-turbid air cavity inlet, and the top of the turbid air volute cover 322 has a second sub-turbid air cavity inlet; the side of the turbid air volute 321 has a first sub-turbid air cavity outlet, and the side of the turbid air volute cover 322 has a second sub-turbid air cavity outlet; when the turbid air volute 321 and the turbid air volute cover 322 are fastened together, the first sub-turbid air cavity inlet and the second sub-turbid air cavity inlet constitute a turbid air inlet, and the first sub-turbid air cavity outlet and the second sub-turbid air cavity outlet constitute a turbid air outlet; so that the indoor turbid air can smoothly enter the turbid air cavity 324 through the turbid air heat exchange channel 212 and the turbid air inlet, and smoothly be discharged to the outside through the outlet of the turbid air cavity 324.

[0147] To address the issue of the complex structure of the drive mechanism in the fresh air module 5, this embodiment proposes that the fresh air assembly 31 further includes a fresh air fan blade 313, which is rotatably disposed within the fresh air cavity 314; the stale air assembly 32 further includes a stale air fan blade 323, which is rotatably disposed within the stale air cavity 324; the fresh air volute 311 has a first shaft hole that communicates with the fresh air cavity 314; the stale air volute 321 has a second shaft hole that communicates with the stale air cavity 324.

[0148] The fresh air module 5 includes a drive motor 33, which is disposed between the fresh air volute 311 and the turbid air volute 321. The output shaft of the drive motor 33 includes a first shaft end 331 and a second shaft end 332. The first shaft end 331 passes through a first shaft hole and is driven to connect with the fresh air fan blade 313. The second shaft end 332 passes through a second shaft hole and is driven to connect with the turbid air fan blade 323.

[0149] When the drive motor 33 rotates, the fresh air fan blade 313 and the stale air fan blade 323 can rotate synchronously.

[0150] Furthermore, the base 1 also includes a base plate 12, which is disposed on one side of the base body 11 and close to the air inlet end of the base air duct 111. The base plate has a fresh air inlet and a return air outlet. A fresh air inlet duct 131 is provided at the fresh air inlet, and a stale air exhaust duct 132 is provided at the return air outlet. The fresh air inlet duct 131 connects the air inlet end of the base air duct 111 to the outside, and the stale air exhaust duct 132 connects the outlet of the stale air chamber 324 to the outside. The air inlet duct 131, the base air duct 111, and the fresh air cavity 314 are connected in sequence to form a fresh air flow path. The end of the fresh air inlet duct 131 near the outside forms the inlet of the fresh air flow path, and the outlet of the fresh air cavity is the outlet of the fresh air flow path. The turbid air heat exchange duct 212, the turbid air cavity 324, and the turbid air exhaust duct 132 are connected in sequence to form a turbid air flow path. The end of the turbid air exhaust duct 132 near the outside forms the outlet of the turbid air flow path, and the air inlet end of the turbid air heat exchange duct 212 is the inlet of the turbid air flow path.

[0151] To address the issues of insecure fixing and poor sealing of the filter 22 and heat exchange component 21, this embodiment proposes that the base air duct 111 includes a first mounting position and a second mounting position, which are arranged sequentially along the direction of fresh air flow; a first frame 141 is provided at the first mounting position, and the filter 22 is provided on the first frame 141; the fresh air in the base air duct 111 can flow through the filter 22;

[0152] A second frame 142 is provided at the second installation position, and a heat exchange component 21 is provided on the second frame 142; specifically, both the first frame 141 and the second frame 142 are cuboid structures, and both the filter 22 and the heat exchange component 21 are cuboid structures.

[0153] Furthermore, the filter 22 is sealed to the first frame 141, and the heat exchanger 21 is sealed to the second frame 142; the seal is tight, so that the fresh air in the base air duct 111 flows through the filter 22 and the fresh air heat exchange duct 211 in sequence and enters the fresh air cavity 314, while the turbid air in the turbid air heat exchange duct 212 enters the turbid air cavity 324; this avoids the indoor turbid air being mixed with the outdoor fresh air, which would reduce the quality of the outdoor fresh air.

[0154] A first partition 151 is provided between the base body 11 and the fresh air assembly 31. The first partition 151 is close to the base plate 12, and one end of the first partition 151 is connected to the base plate 12, while the other end of the first partition 151 is connected to the bottom of the first frame 141, so that the first partition 151, the base plate 12, and the side wall of the base body 11 form a fresh air inlet cavity 161. The fresh air inlet cavity 161 is connected to the inlet end of the fresh air inlet pipe 131 and the base air duct 111. Outdoor fresh air enters the fresh air inlet cavity 161 through the fresh air inlet pipe 131 and then enters the base air duct 111.

[0155] A second partition 152 is also provided between the base body 11 and the fresh air assembly 31. One end of the second partition 152 is connected to the bottom of the first frame 141, and the other end of the second partition 152 is connected to the bottom of the second frame 142. A fresh air connection port is formed between the second partition 152 and the side wall of the base body 11. The fresh air connection port connects the air outlet of the base air duct 111 and the inlet of the fresh air cavity 314. A turbid air connection cavity 162 is formed between the second partition 152, the first frame 141, the second frame 142 and the turbid air volute 321. The turbid air connection cavity 162 connects the turbid air heat exchange channel 212 and the inlet of the turbid air cavity 324. The turbid air in the turbid air heat exchange channel 212 enters the turbid air cavity 324 through the turbid air connection cavity 162.

[0156] An electrical box mounting position is also formed on the bottom side of the base plate 12 near the base body 11. The electrical box 23 is set at the electrical box mounting position and is connected to the base plate 12 by threads. A fresh air control board is set inside the electrical box 23. The fresh air control board is electrically connected to the drive motor 33 to control the operation of the drive motor 33.

[0157] The base body 11 has a slot formed on the side wall near the base plate 12. The slot is used to mount the base plate 12 on the wall-mounted plate 24, so that the base plate 12 can be mounted on the wall.

[0158] In addition, the fresh air module 5 also includes a mask 4, which is detachably fastened to the base plate 12 to form an installation cavity, and the base body 11 is provided in the installation cavity; the top wall of the mask 4 forms a mask inlet 41, which connects the air inlet of the room and the air inlet of the turbid air heat exchange channel 212; the turbid air in the room can enter the turbid air heat exchange channel 212 through the mask inlet 41.

[0159] The bottom wall of the mask 4 has a mask outlet 42, and the bottom of the fresh air cavity 314 has a fresh air cavity outlet. The fresh air cavity outlet is connected to the room through the mask outlet 42. The fresh air in the fresh air cavity 314 can be discharged into the room through the fresh air cavity 314 outlet and the mask outlet 42.

[0160] Example 2

[0161] Unlike Example 1, as Figure 10 As shown, when the fresh air conditioner is in cooling mode:

[0162] 1. When T is detected continuously for time t 设 -T1≤T 外 ≤T 设 When +T1 is reached, it indicates that the outdoor ambient temperature is close to the set temperature, and the large influx of fresh air will not cause an increase in energy consumption. Therefore, the fresh air damper and exhaust damper are fully open (position 1); T 外 The outdoor ambient temperature, T 设 To set the temperature;

[0163] 2. When T is detected continuously for time t... 外 >T 设 When T1 is +T1, it indicates that the outer ring temperature is high. At this point, further assessment of the fresh air unit's outlet temperature is needed. If T... 新出 ≤T 设 +T 1n This indicates that after the fresh air is cooled by the total heat exchanger, the temperature can be reduced to an acceptable range. At this time, the fresh air damper and exhaust damper can still be fully open (position 1). As the detected temperature at the fresh air outlet gradually increases, the fresh air damper and exhaust damper will gradually close until they are completely closed. As described in the control logic, the temperature at the T-phase detector will be adjusted accordingly. 设 +T 1n <T 新出 ≤T 设 +T 2n At this time, the fresh air damper and exhaust air damper are slightly closed (position 2); T is detected. 设 +T 2n <T 新出 ≤T 设 +T 3n At this time, the fresh air and exhaust air dampers are further closed (position 3); T is detected. 新出 >T 设 +T 3n At that time, both the fresh air damper and the exhaust air damper are closed (position 4); T 新出 The temperature at the air outlet of the fresh air unit;

[0164] 3. When T is detected continuously for time t 外 <T 设 When T1 is -T1, it indicates that the outer ring temperature is low, and outdoor air can be used as a cold source. At this point, further assessment of the indoor ambient temperature is needed. If T... 内 <T 设 -T 1nn This indicates that the inner ambient temperature is already relatively low, at which point the fresh air cooling source can be input at an appropriately low air volume (position 3); T 设 -T 1nn ≤T 内 ≤T 设 +T 1nn This indicates that the current ambient temperature is within the comfortable range, and at this time, a moderate airflow is supplied from the fresh air cooling source (location 2) to maintain the existing equilibrium. (T) 内 >T 设 +T 1nn This indicates that the indoor temperature is relatively high, requiring a large influx of fresh, cold air (location 1) to lower the indoor temperature; T 内 Indoor ambient temperature;

[0165] Preferably, T1 = 1℃, T 1n =1℃, T 2n =2℃, T3n =3℃ and T 1nn =1℃, t=30s.

[0166] like Figure 11 As shown, when the fresh air conditioner is in heating mode:

[0167] 1. When T is detected continuously for time t 设 -T1≤T 外 ≤T 设 When +T1 is reached, it indicates that the outdoor ambient temperature is close to the set temperature, and the large influx of fresh air will not cause an increase in energy consumption. Therefore, the fresh air damper and exhaust damper are fully open (position 1); T 外 The outdoor ambient temperature, T 设 To set the temperature;

[0168] 2. When T is detected continuously for time t... 外 <T 设 When T1 is -T1, it indicates that the outer ring temperature is low. At this point, further judgment should be made regarding the temperature at the fresh air unit's outlet. If T... 新出 ≥T 设 -T 1m This indicates that after the fresh air is heated by the total heat exchanger, the temperature can rise to an acceptable range. At this time, the fresh air damper and exhaust damper can still be fully open (position 1). As the detected temperature at the fresh air outlet gradually decreases, the fresh air damper and exhaust damper will gradually close until they are completely closed. As described in the control logic, the temperature at the T-phase detector... 设 -T 2m ≤T 新出 <T 设 -T 1m At this time, the fresh air damper and exhaust air damper are slightly closed (position 2); T is detected. 设 -T 3m ≤T 新出 <T 设 -T 2m At this time, the fresh air and exhaust air dampers are further closed (position 3); T is detected. 新出 <T 设 -T 3m At that time, both the fresh air damper and the exhaust air damper are closed (position 4); T 新出 The temperature at the air outlet of the fresh air unit;

[0169] 3. When T is detected continuously for time t 外 >T 设 When T1 is greater than T1, it indicates that the outer ring temperature is relatively high, and outdoor air can be used as a heat source. At this point, further assessment of the indoor ambient temperature is needed. If T... 内 <T 设 -T 1mmit indicates that the indoor temperature is relatively low, and a large input of fresh air heat source (position 1) is required to increase the indoor temperature; T 设 -T 1mm ≤T 内 ≤T 设 +T 1mm indicates that the current ambient temperature is within the comfort range, and at this time, the fresh air heat source (position 2) inputs medium air volume to maintain the existing equilibrium state; T 内 >T 设 +T 1mm it indicates that the indoor ring temperature is already relatively high, and at this time, the fresh air heat source can appropriately input low air volume (position 3); T 内 is indoor ambient temperature;

[0170] preferably, T1=1°C, T 1m =1°C, T 2m =2°C, T 3m =3°C and T 1mm =1°C, t=30s.

[0171] as shown in Figure 12 , when the fresh air conditioner is in dehumidification mode:

[0172] 1. When ΔH≥H3 is detected continuously for time t, it indicates that the relative humidity of the indoor environment is much higher than that of the outdoor environment, that is, the outdoor environment is relatively dry, and the introduction of fresh air will basically not increase the moisture load of the indoor environment. While ensuring air quality, the fresh air damper and the exhaust air damper (position 1) can be fully opened; ΔH is the relative humidity of the indoor environment;

[0173] 2. When H2≤ΔH<H3 is detected continuously for time t, it indicates that the humidity of the indoor environment is slightly higher than the relative humidity of the outdoor environment, and the outdoor environment is relatively dry. The introduction of fresh air will slightly increase the moisture load of the indoor environment. Under the condition of giving consideration to energy saving and ensuring air quality, the fresh air damper and the exhaust air damper (position 2) can be properly closed;

[0174] 3. When H1≤ΔH<H2 is detected continuously for time t, it indicates that the humidity of the indoor environment is slightly higher than the relative humidity of the outdoor environment, and the outdoor environment is slightly drier than the indoor environment. However, in order to ensure a certain amount of fresh air, the fresh air damper and the exhaust air damper (position 3) are appropriately opened while giving consideration to energy saving and ensuring air quality;

[0175] 4. When ΔH<H1 is detected continuously for time t, it indicates that the humidity of the indoor environment is lower than the relative humidity of the outdoor environment, that is, the outdoor environment is relatively humid, and the introduction of fresh air will seriously affect the dehumidification effect, so it is necessary to completely close the fresh air damper and the exhaust air damper (position 4);

[0176] Preferably, H1 = 10%, H2 = 20% and H3 = 30%, t = 30s.

[0177] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A control method for a fresh air conditioning unit, the fresh air conditioning unit comprising an indoor unit, the indoor unit comprising an indoor unit body and a fresh air module that can be controlled to operate simultaneously; the fresh air module forming a fresh air flow path and a stale air flow path; the fresh air flow path forming a fresh air flow path inlet communicating with the outside and a fresh air flow path outlet communicating with the inside, a fresh air damper provided at the fresh air flow path inlet; the stale air flow path forming a stale air flow path inlet communicating with the inside and a stale air flow path outlet communicating with the outside; a stale air damper provided at the stale air flow path inlet; a heat exchange component thermally coupled between the fresh air flow path and the stale air flow path, the heat exchange component being used to realize heat exchange between the fresh air flow path and the stale air flow path; characterized in that, The control method includes: Calculate T 外 and T 预设 The difference ΔT 外 And determine the current operating mode of the fresh air conditioner; According to the ΔT 外 Determine the target fresh air volume and target stale air volume based on the current operating mode; Control the fresh air damper and the stale air damper to make the fresh air air conditioner operate at the target fresh air volume and the target stale air volume; Wherein, the T 外 The current outdoor air temperature, T 预设 The preset temperature for indoor users, ΔT 外 =T 外 -T 预设 The current operating mode is either heating mode or cooling mode. According to the ΔT 外 Determining the target fresh air volume and target stale air volume based on the current operating mode includes: When the preset time period ΔT 外 Within the preset interval I 外 When the target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, the target stale air volume is determined to be the maximum stale air volume of the fresh air conditioner; When the preset time period ΔT 外 Not in the preset interval I 外 When, calculate T 出 and T 预设 The difference ΔT 出 And according to the ΔT 出 Determine the target fresh air volume and target stale air volume, or calculate T. 内 and T 预设 The difference ΔT 内 And according to the ΔT 内 Determine the target fresh air volume and the target stale air volume; Wherein, the I 外 =[-T 外1 T 外1 The T 出 The current temperature of the air at the outlet of the fresh air flow path, ΔT 出 =T 出 -T 预设 The T 内 The current temperature of the indoor air, ΔT 内 =T 内 -T 预设 .

2. The control method for a fresh air conditioning system according to claim 1, characterized in that, When the current operating mode is cooling mode, the method based on ΔT 出 or ΔT 内 Determining the target fresh air volume and target stale air volume includes: When the preset time period ΔT 外 Greater than I 外 When the maximum threshold is reached, the ΔT is determined. 出 The preset interval I 出 And according to the I 出 Determine the target fresh air volume and the target stale air volume; When the preset time period ΔT 外 Less than I 外 When the minimum threshold is reached, the ΔT is determined. 内 The preset interval I 内 And according to the I 内 Determine the target fresh air volume and the target stale air volume.

3. The control method for a fresh air conditioning system according to claim 2, characterized in that, The I 出 Including I 出1 I 出2 I 出3 , and I 出4 According to the I 出 Determining the target fresh air volume and target stale air volume includes: The ΔT 出 In the I 出1 When the target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, the target stale air volume is determined to be the maximum stale air volume of the fresh air conditioner; The ΔT 出 In the I 出2 At that time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 2 / 3 of the maximum stale air volume of the fresh air conditioner; The ΔT 出 In the I 出3 At that time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 1 / 3 of the maximum stale air volume of the fresh air conditioner; The ΔT 出 In the I 出4 At that time, both the target fresh air volume and the target stale air volume are zero; Wherein, the I 出1 =(-∞, T) 出1 The I 出2 =(T 出1 T 出2 The I 出3 =(T 出2 T 出3 The I 出4 =(T 出3 (+∞).

4. The control method for a fresh air conditioning system according to claim 2, characterized in that, The I 内 Including I 内1 I 内2 and I 内3 According to the I 内 Determining the target fresh air volume and target stale air volume includes: The ΔT 内 In the I 内1 At that time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 1 / 3 of the maximum stale air volume of the fresh air conditioner; The ΔT 内 In the I 内2 At that time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 2 / 3 of the maximum stale air volume of the fresh air conditioner; The ΔT 内 In the I 内3 At that time, the target fresh air volume is the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is the maximum stale air volume of the fresh air conditioner; Wherein, the I 内1 =(-∞, T) 内1 ), the I 内2 =[T 内1 T 内2 The I 内3 =(T 内2 (+∞).

5. The control method for a fresh air conditioning system according to claim 1, characterized in that, When the current operating mode is heating mode, the method based on ΔT 出 or ΔT 内 Determining the target fresh air volume and target stale air volume includes: When the preset time period ΔT 外 Less than I 外 When the minimum threshold is reached, the ΔT is determined. 出 The preset interval I' 出 And according to the I' 出 Determine the target fresh air volume and the target stale air volume; When the preset time period ΔT 外 Greater than I 外 When the maximum threshold is reached, the ΔT is determined. 内 The preset interval I' 内 And according to the I' 内 Determine the target fresh air volume and the target stale air volume.

6. The control method for a fresh air conditioning system according to claim 5, characterized in that, The I' 出 Including I' 出1 、I' 出2 、I' 出3 and I' 出4 The statement based on the I' 出 Determining the target fresh air volume and target stale air volume includes: The ΔT 出 In the I' 出1 At that time, both the target fresh air volume and the target stale air volume are zero; The ΔT 出 In the I' 出2 At that time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 1 / 3 of the maximum stale air volume of the fresh air conditioner; The ΔT 出 In the I' 出3 At that time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 2 / 3 of the maximum stale air volume of the fresh air conditioner; The ΔT 出 In the I' 出1 When the target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, the target stale air volume is determined to be the maximum stale air volume of the fresh air conditioner; Wherein, the I' 出1 =(-∞,T' 出3 ), the I' 出2 =[T' 出3 T' 出2 ), the I' 出3 =[T' 出2 T' 出1 ), the I' 出4 =[T' 出1 (+∞).

7. The control method for a fresh air conditioning system according to claim 5, characterized in that, The I' 内 Including I' 内1 、I' 内2 and I' 内3 The statement based on the I' 内 Determining the target fresh air volume and target stale air volume includes: The ΔT 内 In the I' 内1 At that time, the target fresh air volume is the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is the maximum stale air volume of the fresh air conditioner; The ΔT 内 In the I' 内2 At that time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 2 / 3 of the maximum stale air volume of the fresh air conditioner; The ΔT 内 In the I' 内3 At that time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 1 / 3 of the maximum stale air volume of the fresh air conditioner; Wherein, the I' 内1 =(-∞,T' 内1 ), the I' 内2 =[T' 内1 T' 内2 ], the I' 内3 =(T' 内2 (+∞).

8. The control method for a fresh air conditioning system according to claim 1, characterized in that, The fresh air conditioner also features a dehumidification mode. When the current operating mode is dehumidification mode, the control method further includes: Calculate H 内 and H 外 The difference ΔH is determined and the preset interval I in which ΔH is located is determined. 湿 ; According to the preset interval I where ΔH is located 湿 Determine the target fresh air volume and the target stale air volume; Control the fresh air damper and the stale air damper to make the fresh air air conditioner operate at the target fresh air volume and the target stale air volume; Wherein, the H 内 H represents the current relative humidity of the indoor air. 外 The current relative humidity of the outdoor air is given by ΔH = H. 内 -H 外 .

9. The control method for a fresh air conditioning system according to claim 8, characterized in that, The I 湿 Including I 湿1 I 湿2 I 湿3 , and I 湿4 The preset interval I based on the location of ΔH 湿 Determining the target fresh air volume and target stale air volume includes: The ΔH is in the I 湿1 At that time, both the target fresh air volume and the target stale air volume are zero; The ΔH is in the I 湿2 At that time, the target fresh air volume is 1 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 1 / 3 of the maximum stale air volume of the fresh air conditioner; The ΔH is in the I 湿3 At that time, the target fresh air volume is 2 / 3 of the maximum fresh air volume of the fresh air conditioner, and the target stale air volume is 2 / 3 of the maximum stale air volume of the fresh air conditioner; The ΔH is in the I 湿4 When the target fresh air volume is determined to be the maximum fresh air volume of the fresh air conditioner, the target stale air volume is determined to be the maximum stale air volume of the fresh air conditioner; Wherein, the I 湿1 =(-∞, H) 湿1 ), the I 湿2 =[H 湿1 H 湿2 ), the I 湿3 =[H 湿2 H 湿3 ), the I 湿4 =[H 湿3 (+∞).

10. A fresh air conditioning system, characterized in that, The control method for the fresh air conditioning system according to any one of claims 1 to 9 is adopted.

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