Fan coil control method and device and fan coil

Abstract

The invention discloses a fan coil control method and device and a fan coil. The method comprises the steps that the initial opening group number of surface air cooler coils is determined, and the surface air cooler coils are controlled to be opened according to the initial opening group number so that the indoor temperature of the fan coil can be adjusted; after the indoor temperature is adjusted, the indoor humidity of the fan coil is detected; the operation mode of the fan coil is determined according to the indoor humidity, and operation of the fan coil is controlled according to the operation mode; wherein the operation modes at least comprise a heat preservation and moisture preservation mode and a moisture preservation mode. According to the method, the problems that in the prior art, after a conventional fan coil is selected, the operation mode is fixed, the cooling capacity range is narrow, the humidity cannot be adjusted, and the scene adaptability is weak are solved, temperature and humidity adjustment is considered, the method is suitable for different application scenes, and the scene adaptability and user comfort of the fan coil are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fan coil units, and in particular to a fan coil unit control method, device and fan coil unit. Background Art

[0002] Fan coil units, also known as fan discs, are the terminal products of commercial air-conditioning systems. They are used to adjust the indoor environmental comfort (temperature and humidity) and are widely used in commercial buildings.

[0003] At present, fan coil units are commonly available in two-row / three-row / four-row surface cooler coils. Fan coil units with different rows of surface cooler coils are selected according to the local ambient temperature and the density of people in the space. The cooling capacity and dehumidification capacity of different rows of surface cooler coils vary greatly. The cooling capacity and dehumidification capacity of two-row surface cooler coils, three-row surface cooler coils, and four-row surface cooler coils increase in sequence, but the humidity cannot be adjusted after the number of rows of surface cooler coils is fixed. If the model is selected according to the number of rows of multiple tubes, it is easy to over-dehumidify, affecting comfort, and will cause waste of resources and increase operating costs; if the model is selected according to the number of rows of fewer tubes, the cooling efficiency is slow, the user experience is poor, and the scene adaptability is weak.

[0004] Currently, no effective solution has been proposed to the problems in related technologies that conventional fan coil units have fixed operating modes after selection, narrow cooling range, inability to adjust humidity, and weak scene adaptability. Summary of the invention

[0005] The present invention provides a fan coil control method, device and fan coil, so as to at least solve the problems in the prior art that the conventional fan coil has a fixed operation mode after selection, a narrow cooling range, cannot adjust the humidity, and has a weak scene adaptability.

[0006] To solve the above technical problems, according to one aspect of an embodiment of the present invention, a fan coil control method is provided, which is applied to a fan coil, wherein the fan coil comprises: a surface cooler assembly and an adjustable distribution head, the surface cooler assembly comprises multiple groups of surface cooler coils, the adjustable distribution head is connected to the multiple groups of surface cooler coils, and is used to control the number of open surfaces of the surface cooler coils; the method comprises: determining the initial open group number of the surface cooler coils, controlling the opening of the surface cooler coils according to the initial open group number to adjust the indoor temperature of the fan coil; after the indoor temperature is adjusted, detecting the indoor humidity of the fan coil; determining the operation mode of the fan coil according to the indoor humidity, and controlling the operation of the fan coil according to the operation mode; wherein the operation mode at least comprises: a heat preservation and moisture retention mode, and a moisture retention mode.

[0007] Furthermore, determining the initial number of open groups of the condenser coil includes: obtaining the user's set temperature and the current indoor temperature; wherein the current indoor temperature is the dry-bulb temperature; calculating the temperature difference between the current indoor temperature and the set temperature, and determining the initial number of open groups of the condenser coil according to the temperature difference.

[0008] Further, the initial opening number of the surface cooler coil is determined according to the temperature difference, including: obtaining the required cooling capacity corresponding to the temperature difference; determining the initial opening number of the surface cooler coil according to the required cooling capacity; wherein, the cooling capacity adjustment range corresponding to the surface cooler coils with different numbers of groups is preset.

[0009] Furthermore, after controlling the cooling coil to be turned on according to the initial opening group number, it also includes: after the cooling coil is turned on for a first preset time, detecting the current indoor temperature to determine whether the current indoor temperature reaches the set temperature; if so, determining that the indoor temperature adjustment is complete; otherwise, when the current indoor temperature is greater than the set temperature, redetermining the initial opening group number of the cooling coil, and when the current indoor temperature is less than the set temperature, controlling the fan coil to be shut down for a second preset time and then redetermining the initial opening group number of the cooling coil.

[0010] Furthermore, the operation mode of the fan coil unit is determined according to the indoor humidity, including: obtaining the user's set humidity and the current indoor humidity; when the set humidity is greater than the current indoor humidity, determining that the operation mode is the thermal insulation and moisture retention mode; when the set humidity is not greater than the current indoor humidity, determining that the operation mode is the moisture retention mode.

[0011] Furthermore, the operation of the fan coil unit is controlled according to the operation mode, including: when the operation mode is the thermal insulation and moisture retention mode, obtaining the air enthalpy difference between the current air enthalpy value in the room where the fan coil unit is located and the target air enthalpy value, and adjusting the number of open groups of the cooler coil unit according to the air enthalpy difference to adjust the indoor temperature and the indoor humidity; when the operation mode is the moisture retention mode, obtaining the required cooling capacity of the fan coil unit, determining the minimum number of open groups of the cooler coil unit that meets the required cooling capacity, and controlling the opening of the cooler coil unit according to the minimum number of open groups.

[0012] Furthermore, the number of open groups of the cooler coils is adjusted according to the air enthalpy value difference, including: obtaining the enthalpy value operating ranges corresponding to different numbers of cooler coils; wherein the enthalpy value operating ranges corresponding to two adjacent groups of cooler coils have an overlapping range; determining whether the air enthalpy value difference is within the overlapping range; if so, controlling the cooler coils to be opened according to the energy-saving mode; otherwise, controlling the cooler coils to be opened according to the number of groups of the cooler coils corresponding to the air enthalpy value difference.

[0013] Furthermore, controlling the cooling coil to be turned on according to the energy-saving mode includes: comparing the energy efficiency values ​​of the two groups of cooling coils corresponding to the overlapping range; and controlling the cooling coil to be turned on according to the number of the group of cooling coils with the lower energy efficiency value.

[0014] According to another aspect of an embodiment of the present invention, a fan coil control device is provided, which is applied to a fan coil unit, wherein the fan coil unit comprises: a surface cooler assembly and an adjustable distribution head, wherein the surface cooler assembly comprises a plurality of groups of surface cooler coils, and the adjustable distribution head is connected to the plurality of groups of surface cooler coils and is used to control the number of the surface cooler coils that are opened; the device comprises: a determination module, which is used to determine the initial number of groups opened for the surface cooler coils, and control the opening of the surface cooler coils according to the initial number of groups opened to adjust the indoor temperature where the fan coil unit is located; a detection module, which is used to detect the indoor humidity where the fan coil unit is located after the indoor temperature is adjusted; a control module, which is used to determine the operating mode of the fan coil unit according to the indoor humidity, and control the operation of the fan coil unit according to the operating mode; wherein the operating modes include at least: a heat preservation and moisture retention mode and a moisture retention mode.

[0015] According to another aspect of the embodiments of the present invention, a fan coil unit is provided, comprising the fan coil unit control device as described above.

[0016] According to another aspect of an embodiment of the present invention, a storage medium containing computer executable instructions is provided. When the computer executable instructions are executed by a computer processor, they are used to execute the fan coil unit control method as described above.

[0017] In the present invention, a fan coil control scheme is provided, which is applied to a fan coil with an adjustable surface cooler assembly. First, the initial opening group number of the surface cooler coil is determined, and the surface cooler coil is controlled to open according to the initial opening group number to adjust the indoor temperature where the fan coil is located. After that, after the indoor temperature is adjusted, the indoor humidity where the fan coil is located is detected, the operation mode of the fan coil is determined according to the indoor humidity, and the operation of the fan coil is controlled according to the operation mode. The operation mode at least includes a heat preservation and moisturizing mode and a moisturizing mode to take into account both temperature and humidity requirements, or minimize humidity changes. Through the above-mentioned surface cooler coil opening group number adjustment scheme, hierarchical adjustment is achieved, which is not only more reasonable, but also takes into account the adjustment of temperature and humidity, and has different operation modes, which is suitable for different application scenarios, improves the scene applicability and user comfort of the fan coil, and effectively solves the problem that the conventional fan coil in the prior art has a fixed operation mode after selection, a narrow cooling range, and the humidity cannot be adjusted, and the scene adaptability is weak. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of an optional structure of a fan coil unit according to an embodiment of the present invention;

[0019] Figure 2 is an optional flow chart of a fan coil unit control method according to an embodiment of the present invention;

[0020] Figure 3 is an optional schematic diagram of the cooling capacity operating range corresponding to different numbers of rows of fan coil units according to an embodiment of the present invention;

[0021] Figure 4 is an optional schematic diagram of the enthalpy value operating range corresponding to different numbers of groups of condenser coils according to an embodiment of the present invention;

[0022] Figure 5 is another optional flow chart of the fan coil unit control method according to an embodiment of the present invention;

[0023] Figure 6 This is an optional structural block diagram of a fan coil unit control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. 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.

[0025] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0026] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0027] It should be understood that although the terms first, second, third, etc. may be used to describe controllers in embodiments of the present invention, these controllers should not be limited to these terms. These terms are only used to distinguish controllers connected to different devices. For example, without departing from the scope of embodiments of the present invention, a first controller may also be referred to as a second controller, and similarly, a second controller may also be referred to as a first controller.

[0028] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0029] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0030] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] In a preferred embodiment 1 of the present invention, a fan coil control method is provided, and the control method can be directly applied to the fan coil. The fan coil includes: a surface cooler assembly and an adjustable distribution head. The surface cooler assembly includes multiple groups of surface cooler coils. The adjustable distribution head is connected to the multiple groups of surface cooler coils and is used to control the number of surface cooler coils that are opened.

[0033] Figure 1 An optional structural schematic diagram of the fan coil unit is shown in FIG. Figure 1 As shown in the figure, the fan coil unit consists of a fan component, an electrical box, a surface cooler assembly and an adjustable water header. The surface cooler assembly can be arranged in rows, with each row as a group. The adjustable water header is provided with valves 1 to 8. As shown in the figure on the right, a branch pipe is provided between each two valves of the inlet and outlet water headers. By adjusting the valve opening and closing, the number of rows of the surface cooler can be freely switched.

[0034] When valve 1-2 is open and the rest are closed, the rightmost row of surface coolers is running with water, that is, starting the 1st row of surface cooler coils as described later; when valve 1-4 is open and the rest are closed, the rightmost two rows of surface coolers are running with water, that is, starting the 2nd row of surface cooler coils as described later; when valve 1-6 is open and the rest are closed, the rightmost three rows of surface coolers are running with water, that is, starting the 3rd row of surface cooler coils as described later; when valve 1-8 is open and the rest are closed, all surface coolers are running with water, that is, starting the 4th row of surface cooler coils as described later.

[0035] Based on the above fan coil unit, a preferred embodiment 1 of the present invention provides a fan coil unit control method, which is applied to the above fan coil unit.

[0036] Specifically, Figure 2 An optional flow chart of the method is shown as follows: Figure 2 As shown, the method includes the following steps S202-S206:

[0037] S202: determining the initial opening group number of the air cooler coil, and controlling the opening of the air cooler coil according to the initial opening group number to adjust the indoor temperature where the fan coil is located;

[0038] S204: After the indoor temperature is adjusted, the indoor humidity of the fan coil unit is detected;

[0039] S206: Determine the operation mode of the fan coil unit according to the indoor humidity, and control the operation of the fan coil unit according to the operation mode; wherein the operation mode includes at least: a heat preservation and moisture retention mode and a moisture retention mode.

[0040] In the above embodiment, a fan coil control scheme is provided, which is applied to a fan coil with an adjustable surface cooler assembly. First, the initial opening group number of the surface cooler coil is determined, and the surface cooler coil is controlled to open according to the initial opening group number to adjust the indoor temperature where the fan coil is located. After that, after the indoor temperature is adjusted, the indoor humidity where the fan coil is located is detected, the operation mode of the fan coil is determined according to the indoor humidity, and the operation of the fan coil is controlled according to the operation mode. The operation mode includes at least a heat preservation and moisturizing mode and a moisturizing mode to take into account both temperature and humidity requirements, or minimize humidity changes. Through the above-mentioned surface cooler coil opening group number adjustment scheme, hierarchical adjustment is achieved, which is not only more reasonable, but also takes into account the adjustment of temperature and humidity, and has different operation modes, which is suitable for different application scenarios, improves the scene applicability and user comfort of the fan coil, and effectively solves the problem that the conventional fan coil in the prior art has a fixed operation mode after selection, a narrow cooling range, and the humidity cannot be adjusted, and the scene adaptability is weak.

[0041] In a preferred embodiment of the present invention, determining the initial number of groups of the condenser coils to be opened includes: obtaining the user's set temperature and the current indoor temperature; wherein the current indoor temperature is the dry-bulb temperature; calculating the temperature difference between the current indoor temperature and the set temperature, and determining the initial number of groups of the condenser coils to be opened according to the temperature difference. First, the user's set temperature is used as the adjustment target, and the difference between the indoor temperature and the target temperature is detected, which is used to adjust the number of rows of condenser coils, that is, the initial number of groups of the condenser coils to be opened, so that the indoor temperature reaches the user's set temperature. The dry-bulb temperature is used for calculation and corresponding control, that is, the humidity is not processed in the temperature adjustment stage, and only the temperature is considered. The humidity is regulated after the temperature is adjusted, so that the humidity is adjusted after the temperature requirement is met. The adjustments are made separately to improve the adjustment accuracy.

[0042] Specifically, the initial opening number of the condenser coil is determined according to the temperature difference, including: obtaining the required cooling capacity corresponding to the temperature difference; determining the initial opening number of the condenser coil according to the required cooling capacity; wherein, a cooling capacity adjustment range corresponding to different numbers of condenser coils is preset so that the required cooling capacity is within the cooling capacity adjustment range corresponding to the initial opening number of the groups, wherein the greater the temperature difference, the greater the required cooling capacity, and the greater the required cooling capacity, the greater the initial opening number of the groups.

[0043] Figure 3 This is an optional schematic diagram of the cooling capacity operating range corresponding to different rows of fan coil units, such as Figure 3As shown, the horizontal axis is the cooling capacity, and the vertical axis is the number of rows of the condenser coil. 0~a is the cooling capacity operating range of 1 row of condenser coils, a~b is the cooling capacity range excluding the overlapping cooling capacity of 1 and 2 rows of condenser coils, and the same applies to b~c and c~d. Based on this, when the humidity cannot meet the user's needs, it can be operated with a smaller number of rows in the overlapping section of cooling capacity operation to reduce humidity changes and realize the operation of the unit in intelligent moisturizing mode. The data of a, b, c, and d can be obtained through experimental tests during the unit development stage.

[0044] During the temperature adjustment stage, the surface cooler is controlled to operate in a reasonable number of rows through temperature differences in different ranges to avoid unreasonable situations such as a small temperature difference but using 4 rows of surface cooler coils, resulting in a small air volume, or a large temperature difference but using 1 row of surface cooler coils, resulting in a large air volume.

[0045] For example: if the temperature difference △T≤X, the difference between the indoor temperature and the user-set temperature is small, and the 1st row of condenser coils is started and maintained for m minutes;

[0046] If X<△T≤Y, start the 2nd row of surface cooler coils and keep running for m minutes;

[0047] If Y<△T≤Z, start the 3-row surface cooler coil and keep running for m minutes;

[0048] If △T>Z, the difference between the indoor temperature and the user-set temperature is large, and the 4-row surface cooler coil is started and maintained for m minutes;

[0049] X, Y, and Z are the optimal operating temperature differences of each row of coils, which can avoid the situation where small air volume and large number of coils result in small temperature difference and large cooling capacity, and large air volume and small number of coils result in large temperature difference and small cooling capacity.

[0050] In order to achieve accurate temperature control, after controlling the cooling coil to open according to the initial opening group number, the control scheme also includes: after the cooling coil is turned on for a first preset time, detecting the current indoor temperature to determine whether the current indoor temperature reaches the set temperature; if so, determining that the indoor temperature adjustment is complete; otherwise, when the current indoor temperature is greater than the set temperature, redetermining the initial opening group number of the cooling coil; when the current indoor temperature is less than the set temperature, controlling the fan coil to shut down for a second preset time and then redetermining the initial opening group number of the cooling coil.

[0051] Detect the indoor temperature after running for a period of time and calculate the difference with the user set temperature to determine whether the temperature has reached the target temperature. For example, detect the indoor temperature T3 at this time and calculate the absolute value of the difference between the indoor temperature and the user set temperature △T=|T3-T 设∣, judge whether △T≤T' is established, T' is the allowable temperature difference, and judge whether the indoor temperature meets the user's set requirements based on this. If so, it means that the temperature has reached the user's set temperature and enters humidity control; if not, it means that the temperature has not reached the user's set temperature. The indoor temperature has not reached the target temperature, and the temperature is too high or too low. If it is too high, return to determine the initial number of open groups of the condenser coil, because the cooling temperature difference will change over a period of time, and there is a possibility of readjusting the number of rows of the condenser coil; if it is too low, shut down for a period of time, and wait for the temperature to rise and return to determine the initial number of open groups of the condenser coil, so that the indoor temperature can reach the set temperature as soon as possible, and make the adjustment process more suitable for the current environment, with a faster adjustment rate and better adjustment effect.

[0052] In the above implementation, the temperature parameter has been preliminarily adjusted, and then the humidity is adjusted. Specifically, the operation mode of the fan coil unit is determined according to the indoor humidity, including: obtaining the user's set humidity and the current indoor humidity; when the set humidity is greater than the current indoor humidity, determining the operation mode to be the heat preservation and moisturizing mode; when the set humidity is not greater than the current indoor humidity, determining the operation mode to be the moisturizing mode. At this time, the temperature has reached the set temperature, and the humidity of the indoor air is obtained at this time. The indoor humidity at this time can be calculated by obtaining the indoor dry-bulb temperature and wet-bulb temperature, and the air enthalpy value can be calculated by the humidity and the indoor dry-bulb temperature, and used in the next stage to achieve moisturizing or heat preservation and moisturizing effects.

[0053] When the operation mode is the thermal insulation and moisture retention mode, the air enthalpy difference in the room where the fan coil is located is obtained, and the number of open groups of the air cooler coil is adjusted according to the air enthalpy difference to adjust the indoor temperature and indoor humidity; when the operation mode is the moisture retention mode, the required cooling capacity of the fan coil is obtained, the minimum number of open groups of the air cooler coil that meets the required cooling capacity is determined, and the opening of the air cooler coil is controlled according to the minimum number of open groups.

[0054] Detect the current humidity and the set humidity. Since the air conditioner cannot humidify, it can only minimize the humidity change. At this time, if the temperature has met the target temperature, determine whether the set humidity is greater than the current humidity, that is, ψ 设 >ψ1, if yes, record the cooling capacity W of the unit’s current stable operating temperature, enter the moisturizing mode, and Figure 3 , select the minimum number of rows of the surface cooler coil that meets the cooling capacity W, and try to reduce the number of rows of the surface cooler coil while meeting the cooling capacity. At this time, the humidity changes little and does not change the temperature. If the set humidity is not greater than the current humidity, that is, ψ 设 ≤ψ1, the temperature and humidity can be met at the same time through enthalpy adjustment. According to the enthalpy value, a reasonable number of condenser coil rows can be selected to avoid unreasonable operation.

[0055] Specifically, adjusting the number of groups of cooler coils to be turned on according to the difference in air enthalpy values ​​includes: obtaining the enthalpy operating ranges corresponding to different groups of cooler coils; wherein the enthalpy operating ranges corresponding to two adjacent groups of cooler coils have overlapping ranges; determining whether the difference in air enthalpy values ​​is within the overlapping range; if so, controlling the cooler coils to be turned on according to the energy-saving mode; otherwise, controlling the cooler coils to be turned on according to the number of groups of cooler coils corresponding to the difference in air enthalpy values. Further, controlling the cooler coils to be turned on according to the energy-saving mode includes: comparing the energy efficiency values ​​of the two groups of cooler coils corresponding to the overlapping range; controlling the cooler coils to be turned on according to the number of groups of a group of cooler coils with a lower energy efficiency value.

[0056] Figure 4 The following is a schematic diagram of the enthalpy operating range corresponding to different groups of surface cooler coils, such as Figure 4 As shown, the horizontal axis is the enthalpy value, and the boxes are the operating ranges of the enthalpy values ​​of each tube row. That is, the operating range of 1 row of surface cooler coils is 0~K2, the operating range of 2 rows of surface cooler coils is K1~K4, the operating range of 3 rows of surface cooler coils is K3~K6, and the operating range of 4 rows of surface cooler coils is K5~K7. K1~K2 is the overlapping range of the operation of 1 row of surface cooler coils and 2 rows of surface cooler coils, K3~K4 is the overlapping range of the operation of 2 rows of surface cooler coils and 3 rows of surface cooler coils, and K5~K6 is the overlapping range of the operation of 3 rows of surface cooler coils and 4 rows of surface cooler coils. Accordingly, within the overlapping range of operation, by comparing the operating energy efficiency values ​​of one less row of surface cooler coils and one more row of surface cooler coils, low energy efficiency operation of the unit can be achieved, and the unit energy-saving mode operation can be achieved. Within the non-overlapping range of operation, normal operation is carried out according to the operating range to achieve the normal mode operation of the unit. Data such as K1~K6 are obtained through experimental testing during the unit development stage.

[0057] For example, calculate the air enthalpy value h1 at the current indoor temperature and humidity, calculate the air enthalpy value h2 at the user-set temperature and humidity, and calculate the difference between the final required enthalpy value and the current enthalpy value: △h = h2-h1; according to the attached Figure 4 Determine which part of the air enthalpy difference △h∈(k1,k2) or (k3,k4) or (k5,k6), that is, whether it belongs to the overlapping part.

[0058] If it does not fall within the overlap range, run in normal cooling mode and run for m minutes as follows:

[0059] When △h≤k1, it operates as one row of surface cooler coils;

[0060] When △h∈(k2, k3), it operates according to the 2-row condenser coil;

[0061] When △h∈(k4, k5), it operates according to the 3-row surface cooler coil;

[0062] When △h≥k6, operate according to 4 rows of surface cooler coils.

[0063] If it is within the overlap range, run the energy-saving mode and operate as follows:

[0064] When △h∈(k1, k2), obtain the operation energy efficiency n1 of the 1st row of surface cooler coils and n2 of the 2nd row of surface cooler coils;

[0065] When △h∈(k3, k4), obtain the operating energy efficiency n1 of the 2nd row of surface cooler coils and the operating energy efficiency n2 of the 3rd row of surface cooler coils;

[0066] When △h∈(k5, k6), obtain the operating energy efficiency n1 of the 3-row surface cooler coil and the operating energy efficiency n2 of the 4-row surface cooler coil;

[0067] Determine whether the energy efficiency n1 of the small number of tube rows is greater than or equal to the energy efficiency n2 of the multi-row surface cooler coil, that is, n1 ≥ n2;

[0068] If yes, run it for m1 minutes with large air volume and small number of tubes, and then return to determine the initial number of open groups of the condenser coils;

[0069] If not, run one more row of condenser coils at low air volume for m1 minutes and then return to determine the initial number of condenser coils open;

[0070] That is, operate in an operating mode with a higher energy efficiency value to achieve energy saving effect.

[0071] Within the overlapping range of operating enthalpy values ​​for different numbers of tube rows, for example, the enthalpy value h1 can be met by both one row of surface cooler coils and two rows of surface cooler coils, but there are differences in operating energy efficiency for different numbers of tube rows. By comparing the energy efficiency, the operating mode with the highest energy efficiency is selected to achieve energy-saving effect.

[0072] In the above implementation, by calculating the difference between the indoor temperature and the user-set temperature, the operation of the 1-4 rows of the surface cooler is graded and adjusted. After the adjustment, the difference between the indoor temperature and the user-set temperature is calculated again to determine whether the indoor temperature meets the user-set temperature. If it does not meet the requirements, the unit is shut down or the above actions are repeated until the requirements are met. If the requirements are met, the conventional cooling mode, energy-saving mode or moisturizing mode is operated according to the indoor humidity and the user-set humidity. When the humidity set by the user is greater than the current indoor humidity, the energy-saving mode or the conventional cooling mode is operated, and the temperature and humidity are met at the same time through enthalpy adjustment. Otherwise, the moisturizing mode is operated, and according to the current cooling value of the unit, a small number of rows of tubes are selected to operate, and the indoor humidity is maintained as much as possible while meeting the temperature. Accordingly, the three modes of the unit are adjusted autonomously to achieve the purpose of energy saving and comfort of the unit, and greatly improve the scene adaptability.

[0073] Another fan coil control method is provided in the preferred embodiment 1 of the present invention. Specifically, Figure 5An optional flow chart of the method is shown as follows: Figure 5 As shown, the method includes the following steps S501-S520:

[0074] S501: Get the set temperature T 设 , humidity ψ 设 ;

[0075] S502: Detect indoor dry bulb temperature T1;

[0076] S503: Calculate ΔT=T1-T 设 ; Control the surface cooler to operate in a reasonable number of rows through temperature differences in different ranges, to avoid unreasonable situations such as using 4 rows of pipes for a small temperature difference, resulting in a small air volume; or using 1 row of pipes for a large temperature difference, resulting in a large air volume;

[0077] S504: △T≤x, start the first row of surface coolers (coils), and keep running for m minutes;

[0078] S505: x<△T≤y, start the second row of surface coolers and keep running for m minutes;

[0079] S506: y<△T≤z, start the 3rd row of surface coolers and keep running for m minutes;

[0080] S507: z<△T, start the 4-row surface cooler and keep running for m minutes;

[0081] S508: Detect indoor temperature T3, ΔT = |T3-T 设 ∣≤T' is true, if yes, go to step S511, otherwise, go to step S509; detect the indoor temperature after running for a period of time and calculate the difference to determine whether the temperature has reached the target temperature at this time; if the indoor temperature has not reached the target temperature, there is a situation where the temperature is too high or too low. If it is too high, return to S502 to run, because the cooling temperature difference will become smaller over a period of time, and there is a possibility of reallocating the number of rows of the two devices; if it is too low, stop for a period of time, and wait for the temperature to rise and then return to S502 to run;

[0082] S509:T 设 >Whether T3 is established, if yes, proceed to step S502, otherwise, proceed to step S510;

[0083] S510: stop and run for m minutes;

[0084] S511: Detect indoor dry and wet bulb temperature T 4、 T5, calculate humidity ψ1, enthalpy h1, according to T4, ψ 设,Get h2, △h = h2-h1; at this time, the temperature has reached the set temperature. The humidity and enthalpy of the indoor air at this time are calculated by the indoor temperature at this time, as well as the air enthalpy of the target temperature and humidity, and the enthalpy difference between the two is calculated, which is used to reasonably allocate the number of coils of the surface cooler according to the enthalpy difference in the future;

[0085] S512: 设 >Whether ψ holds true, if so, proceed to step S513, otherwise, proceed to step S519;

[0086] S513: Determine whether △h∈(k1, k2) or (k3, k4) or (k5, k6) is true, if so, proceed to step S514, otherwise, proceed to step S518;

[0087] S514: Look up the table to obtain the energy efficiency of the two states when △h:

[0088] When △h∈(k1, k2), the operating energy efficiency of the first row of pipes is n1 and the operating energy efficiency of the second row of pipes is n2;

[0089] When △h∈(k3, k4), the energy efficiency of 2-row pipe operation is n1 and the energy efficiency of 3-row pipe operation is n2;

[0090] When △h∈(k5, k6), the energy efficiency of 3-row pipe operation is n1 and the energy efficiency of 4-row pipe operation is n2;

[0091] S515: whether n1≥n2 holds true, if so, proceed to step S516, otherwise, proceed to step S517; within the overlapping range of the operating enthalpy values ​​of different tube rows, such as the enthalpy value h1, both one row of tubes and two rows of tubes can meet it, but there are differences in the operating energy efficiency of different tube rows, and the operating mode with high energy efficiency is selected through energy efficiency comparison to achieve energy saving effect;

[0092] S516: Operate with large air volume and few pipes;

[0093] S517: operate with one more row of pipes according to the small air volume;

[0094] S518: Execute the following state and run for m minutes:

[0095] When △h≤k1, it operates according to 1 row of pipes;

[0096] When △h∈(k2, k3), it operates according to the two-row pipe;

[0097] When △h∈(k4, k5), it operates according to 3 rows of pipes;

[0098] When △≥k6, it operates according to 4 rows of tubes; when the target humidity is greater than the current humidity, the temperature and humidity can be satisfied at the same time by adjusting the enthalpy value. According to the enthalpy difference, a reasonable number of rows of surface cooler coils is selected to avoid unreasonable operation.

[0099] S519: Record the current cooling capacity of the unit;

[0100] S520: Select the minimum number of rows that meet the cooling capacity W and run for m minutes. Detect the current humidity and the set humidity. Since the air conditioner cannot humidify, it can only minimize the humidity change. After it is determined that the temperature at this time has met the target temperature, record the cooling capacity at this time. In order to meet the small humidity change and not change the temperature, minimize the number of rows of the surface cooler coils while meeting the cooling capacity.

[0101] In the above implementation, a multi-mode fan coil control method is adopted to adjust humidity through enthalpy value, taking into account temperature and humidity at the same time. According to the enthalpy value operating range of each tube row, the energy efficiency value is further compared to optimize the number of rows of the condenser coil, taking into account energy saving effect. When the humidity cannot be met, according to the cooling capacity operating range of each tube row, a small number of tube rows is selected to avoid the operation mode of small air volume and large cooling capacity, which may cause excessive dehumidification. Based on this, the mode is adjusted autonomously, taking into account temperature, humidity and energy saving effect, effectively improving the unit's scene adaptability and human comfort.

[0102] Example 2

[0103] Based on the fan coil control method provided in the above embodiment 1, a fan coil control device is also provided in a preferred embodiment 2 of the present invention, which is applied to the fan coil. The fan coil comprises: a surface cooler assembly and an adjustable water header. The surface cooler assembly comprises a plurality of surface cooler coils. The adjustable water header is connected to the plurality of surface cooler coils and is used to control the number of surface cooler coils opened.

[0104] Specifically, Figure 6 An optional structural block diagram of the device is shown, such as Figure 6 As shown, the device comprises:

[0105] The determination module 602 is used to determine the initial opening group number of the air cooler coil, and control the opening of the air cooler coil according to the initial opening group number to adjust the indoor temperature where the fan coil is located;

[0106] The detection module 604 is connected to the determination module 602 and is used to detect the indoor humidity of the fan coil unit after the indoor temperature is adjusted;

[0107] The control module 606 is connected to the detection module 604, and is used to determine the operation mode of the fan coil unit according to the indoor humidity, and control the operation of the fan coil unit according to the operation mode; wherein the operation mode includes at least: a heat preservation and moisture retention mode, and a moisture retention mode.

[0108] In the above embodiment, a fan coil control scheme is provided, which is applied to a fan coil with an adjustable surface cooler assembly. First, the initial opening group number of the surface cooler coil is determined, and the surface cooler coil is controlled to open according to the initial opening group number to adjust the indoor temperature where the fan coil is located. After that, after the indoor temperature is adjusted, the indoor humidity where the fan coil is located is detected, the operation mode of the fan coil is determined according to the indoor humidity, and the operation of the fan coil is controlled according to the operation mode. The operation mode includes at least a heat preservation and moisturizing mode and a moisturizing mode to take into account both temperature and humidity requirements, or minimize humidity changes. Through the above-mentioned surface cooler coil opening group number adjustment scheme, hierarchical adjustment is achieved, which is not only more reasonable, but also takes into account the adjustment of temperature and humidity, and has different operation modes, which is suitable for different application scenarios, improves the scene applicability and user comfort of the fan coil, and effectively solves the problem that the conventional fan coil in the prior art has a fixed operation mode after selection, a narrow cooling range, and the humidity cannot be adjusted, and the scene adaptability is weak.

[0109] The determination module 602 includes: a first acquisition submodule, used to obtain the user's set temperature and the current indoor temperature; wherein the current indoor temperature is the dry bulb temperature; a calculation submodule, used to calculate the temperature difference between the current indoor temperature and the set temperature, and determine the initial opening group number of the condenser coil according to the temperature difference.

[0110] The calculation submodule includes: an acquisition unit, which is used to obtain the cooling capacity adjustment range corresponding to different numbers of groups of condenser coils; a determination unit, which is used to determine the initial number of open groups of condenser coils according to a correspondence table between temperature difference and cooling capacity adjustment range; wherein, the greater the temperature difference, the greater the number of initially open groups.

[0111] Furthermore, the determination module 602 also includes: a detection submodule, which is used to detect the current indoor temperature after the condenser coil is turned on according to the initial opening group number, and after the condenser coil is turned on for a first preset time, to determine whether the current indoor temperature has reached the set temperature; a first determination submodule, which is used to determine that the indoor temperature adjustment is completed if it is; otherwise, when the current indoor temperature is greater than the set temperature, the initial opening group number of the condenser coil is redetermined, and when the current indoor temperature is less than the set temperature, the fan coil is controlled to stop for a second preset time and the initial opening group number of the condenser coil is redetermined.

[0112] The control module 606 includes: a second acquisition submodule, used to obtain the user's set humidity and the current indoor humidity; a second determination submodule, used to determine that the operating mode is the heat preservation and moisturizing mode when the set humidity is greater than the current indoor humidity; a third determination submodule, used to determine that the operating mode is the moisturizing mode when the set humidity is not greater than the current indoor humidity.

[0113] The control module 606 also includes: a control submodule, which is used to control the operation of the fan coil unit according to the operation mode, and the control submodule includes: a first control unit, which is used to obtain the air enthalpy difference between the current air enthalpy value in the room where the fan coil unit is located and the target air enthalpy value when the operation mode is the thermal insulation and moisturizing mode, and adjust the number of open groups of the condenser coil unit according to the air enthalpy difference to adjust the indoor temperature and indoor humidity; a second control unit, which is used to obtain the required cooling capacity of the fan coil unit when the operation mode is the moisturizing mode, determine the minimum number of open groups of the condenser coil unit that meets the required cooling capacity, and control the opening of the condenser coil unit according to the minimum number of open groups.

[0114] The first control unit includes: an acquisition subunit, which is used to acquire the enthalpy value operating ranges corresponding to different numbers of groups of condenser coils; wherein the enthalpy value operating ranges corresponding to two adjacent groups of condenser coils have an overlapping range; a judgment subunit, which is used to judge whether the air enthalpy value difference is within the overlapping range; a control subunit, which is used to control the condenser coils to be turned on according to the energy-saving mode if so; otherwise, control the condenser coils to be turned on according to the number of groups of condenser coils corresponding to the air enthalpy value difference.

[0115] The control subunit includes: comparing the energy efficiency values ​​of two groups of condenser coils corresponding to the overlap range; and controlling the condenser coils to be turned on according to the number of the group of condenser coils with the lower energy efficiency value.

[0116] In the above implementation, by calculating the difference between the indoor temperature and the user-set temperature, the operation of the condenser pipe is graded and adjusted. After the adjustment, the difference between the indoor temperature and the user-set temperature is calculated again to determine whether the indoor temperature meets the user-set temperature. If it does not meet the requirements, the unit is shut down or the above actions are repeated until the requirements are met. If the requirements are met, the conventional cooling mode, energy-saving mode or moisturizing mode is operated according to the indoor humidity and the user-set humidity. When the humidity set by the user is greater than the current indoor humidity, the energy-saving mode or conventional cooling mode is operated, and the temperature and humidity are met at the same time through enthalpy adjustment. Otherwise, the moisturizing mode is operated, and according to the current cooling value of the unit, a small number of pipes are selected to operate, and the indoor humidity is maintained as much as possible while meeting the temperature. Accordingly, the three modes of the unit are adjusted autonomously to achieve the purpose of energy saving and comfort of the unit, and greatly improve the scene adaptability.

[0117] Regarding the device in the above embodiment, the specific manner in which each unit and module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0118] Example 3

[0119] Based on the fan coil unit control device provided in the above-mentioned embodiment 2, a fan coil unit is further provided in a preferred embodiment 3 of the present invention, including the fan coil unit control device as described above.

[0120] In the above embodiment, a fan coil control scheme is provided, which is applied to a fan coil with an adjustable surface cooler assembly. First, the initial opening group number of the surface cooler coil is determined, and the surface cooler coil is controlled to open according to the initial opening group number to adjust the indoor temperature where the fan coil is located. After that, after the indoor temperature is adjusted, the indoor humidity where the fan coil is located is detected, the operation mode of the fan coil is determined according to the indoor humidity, and the operation of the fan coil is controlled according to the operation mode. The operation mode includes at least a heat preservation and moisturizing mode and a moisturizing mode to take into account both temperature and humidity requirements, or minimize humidity changes. Through the above-mentioned surface cooler coil opening group number adjustment scheme, hierarchical adjustment is achieved, which is not only more reasonable, but also takes into account the adjustment of temperature and humidity, and has different operation modes, which is suitable for different application scenarios, improves the scene applicability and user comfort of the fan coil, and effectively solves the problem that the conventional fan coil in the prior art has a fixed operation mode after selection, a narrow cooling range, and the humidity cannot be adjusted, and the scene adaptability is weak.

[0121] Example 4

[0122] Based on the fan coil control method provided in the above-mentioned embodiment 1, a storage medium containing computer executable instructions is also provided in a preferred embodiment 4 of the present invention. When the computer executable instructions are executed by a computer processor, they are used to execute the fan coil control method as described above.

[0123] In the above embodiment, a fan coil control scheme is provided, which is applied to a fan coil with an adjustable surface cooler assembly. First, the initial opening group number of the surface cooler coil is determined, and the surface cooler coil is controlled to open according to the initial opening group number to adjust the indoor temperature where the fan coil is located. After that, after the indoor temperature is adjusted, the indoor humidity where the fan coil is located is detected, the operation mode of the fan coil is determined according to the indoor humidity, and the operation of the fan coil is controlled according to the operation mode. The operation mode includes at least a heat preservation and moisturizing mode and a moisturizing mode to take into account both temperature and humidity requirements, or minimize humidity changes. Through the above-mentioned surface cooler coil opening group number adjustment scheme, hierarchical adjustment is achieved, which is not only more reasonable, but also takes into account the adjustment of temperature and humidity, and has different operation modes, which is suitable for different application scenarios, improves the scene applicability and user comfort of the fan coil, and effectively solves the problem that the conventional fan coil in the prior art has a fixed operation mode after selection, a narrow cooling range, and the humidity cannot be adjusted, and the scene adaptability is weak.

[0124] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0125] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0126] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0127] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0128] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0129] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0130] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not invented by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0131] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A fan coil unit control method, characterized in that: Applied to a fan coil unit, the fan coil unit comprises: a surface cooler assembly and an adjustable water header, the surface cooler assembly comprises a plurality of groups of surface cooler coils, the adjustable water header is connected to the plurality of groups of surface cooler coils, and is used to control the number of the surface cooler coils opened; the method comprises: Determine the initial opening group number of the air cooler coil, and control the opening of the air cooler coil according to the initial opening group number to adjust the indoor temperature of the fan coil; After the indoor temperature is adjusted, detecting the indoor humidity where the fan coil unit is located; The operation mode of the fan coil unit is determined according to the indoor humidity, and the operation of the fan coil unit is controlled according to the operation mode; wherein the operation mode includes at least: a heat preservation and moisture retention mode and a moisture retention mode.

2. The method according to claim 1, characterized in that Determine the initial number of groups to be opened for the condenser coils, including: Obtain the user's set temperature and current indoor temperature; wherein the current indoor temperature is the dry-bulb temperature; The temperature difference between the current indoor temperature and the set temperature is calculated, and the initial opening number of the condenser coil is determined according to the temperature difference.

3. The method according to claim 2, characterized in that Determining the initial opening number of the surface cooler coil according to the temperature difference includes: Obtaining the required cooling capacity corresponding to the temperature difference; Determine the initial opening number of the surface cooler coils according to the required cooling capacity; Among them, the cooling capacity adjustment ranges corresponding to different numbers of groups of the surface cooler coils are preset.

4. The method according to claim 2, characterized in that: After controlling the surface cooler coil to be turned on according to the initial opening group number, the method further includes: After the condenser coil is turned on for a first preset time, detecting the current indoor temperature and determining whether the current indoor temperature reaches the set temperature; If yes, determining that the indoor temperature adjustment is completed; Otherwise, when the current indoor temperature is greater than the set temperature, the initial number of open groups of the condenser coil is redetermined; when the current indoor temperature is less than the set temperature, the fan coil is controlled to shut down for a second preset time and then the initial number of open groups of the condenser coil is redetermined.

5. The method according to claim 1, characterized in that Determining the operation mode of the fan coil unit according to the indoor humidity includes: Get the user's set humidity and current indoor humidity; When the set humidity is greater than the current indoor humidity, determining that the operation mode is the heat preservation and moisture retention mode; When the set humidity is not greater than the current indoor humidity, the operation mode is determined to be the moisturizing mode.

6. The method according to claim 5, characterized in that Controlling the operation of the fan coil unit according to the operation mode includes: When the operation mode is the heat preservation and moisture retention mode, the air enthalpy difference between the current air enthalpy value and the target air enthalpy value in the room where the fan coil is located is obtained, and the number of open groups of the surface cooler coil is adjusted according to the air enthalpy difference to adjust the indoor temperature and the indoor humidity; When the operation mode is the moisturizing mode, the required cooling capacity of the fan coil is obtained, the minimum opening number of the condenser coil that meets the required cooling capacity is determined, and the condenser coil is controlled to be opened according to the minimum opening number of the condenser coil.

7. The method according to claim 6, characterized in that Adjusting the number of open groups of the surface cooler coil according to the air enthalpy difference includes: Obtaining the enthalpy value operating ranges corresponding to different groups of the surface cooler coils; wherein the enthalpy value operating ranges corresponding to two adjacent groups of the surface cooler coils have overlapping ranges; Determining whether the air enthalpy difference is within the overlap range; If yes, control the surface cooler coil to open according to the energy-saving mode; Otherwise, the cooling coils are controlled to be turned on according to the number of groups of the cooling coils corresponding to the air enthalpy difference.

8. The method according to claim 7, characterized in that Controlling the cooling coil to open according to the energy-saving mode includes: Comparing the energy efficiency values ​​of the two groups of the surface cooler coils corresponding to the overlap range; The surface cooling coils are controlled to open according to the number of groups of the surface cooling coils with lower energy efficiency values.

9. A fan coil unit control device, characterized in that: Applied to a fan coil unit, the fan coil unit comprises: a surface cooler assembly and an adjustable water header, the surface cooler assembly comprises a plurality of groups of surface cooler coils, the adjustable water header is connected to the plurality of groups of surface cooler coils, and is used to control the number of openings of the surface cooler coils; the device comprises: A determination module, used to determine the initial opening group number of the air cooler coil, and control the opening of the air cooler coil according to the initial opening group number to adjust the indoor temperature of the fan coil; A detection module, used for detecting the indoor humidity of the fan coil unit after the indoor temperature is adjusted; A control module is used to determine the operation mode of the fan coil unit according to the indoor humidity and control the operation of the fan coil unit according to the operation mode; wherein the operation mode includes at least: a heat preservation and moisture retention mode and a moisture retention mode.

10. A fan coil unit, characterized in that: It comprises the fan coil unit control device as claimed in claim 9.

11. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions are used to perform the fan coil unit control method according to any one of claims 1 to 8 when executed by a computer processor.

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