Fan coil, air conditioner and control method of air conditioner

Abstract

The invention discloses a fan coil, an air conditioner and a control method of the air conditioner. The fan coil comprises a shell and a heat exchange coil; an air inlet and an air outlet are formed in the shell; the heat exchange coil pipe is arranged in the shell, and air flow is introduced from the air inlet, is subjected to heat exchange through the heat exchange coil pipe and then is blown out from the air outlet; wherein the heat exchange coil pipe comprises two heat exchange coil pipe parts which are used for circulating a refrigerant and water respectively, or the refrigerant and the water can alternately circulate in the heat exchange coil pipe. According to the fan coil provided by the invention, when the fan coil needs to be cleaned, the heat exchange coil is cooled by controlling the temperature of the refrigerant, so that the fan coil is cooled and frosted, and dust is crystallized on the heat exchange coil; and after defrosting, dirt such as dust on the heat exchange coil pipe is taken away along with water flow after defrosting, self-cleaning of the air disc is achieved, a cleaning device does not need to be additionally arranged, and the cleaning mode is more reliable.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning equipment, and in particular to a fan coil unit, an air conditioner and a control method thereof. Background Art

[0002] The fan coil unit is used to exchange heat with the indoor environment and adjust the temperature of the indoor environment. The air outlet of the fan coil unit is close to the indoor environment, so the fan coil part on the air outlet side is easily exposed to dust, resulting in a poor final heating effect.

[0003] In order to remove dust from fan coil units, common fan coil unit self-cleaning technologies include mechanical dust removal, spray dust removal, etc., to clean the dust attached to the surface of the flexible filter layer. However, the existing self-cleaning technology has an increased number of parts, low reliability, high cost, and dust is easily accumulated between components, posing a risk of failure. Summary of the invention

[0004] The main purpose of the present invention is to provide a fan coil unit, an air conditioner and a control method thereof, aiming to solve the problem of dust accumulation in the fan coil unit.

[0005] To achieve the above object, the present invention provides a fan coil unit for an air conditioner, the fan coil unit comprising:

[0006] a housing, formed with an air inlet and an air outlet; and,

[0007] The heat exchange coil is arranged in the shell, and the airflow is introduced from the air inlet, passes through the heat exchange coil for heat exchange, and then blown out from the air outlet;

[0008] The heat exchange coil comprises two heat exchange coil parts for circulating refrigerant and water respectively, or the heat exchange coil can alternately circulate refrigerant and water.

[0009] Optionally, each of the heat exchange coil units includes a first connecting port and a second connecting port, and the fan coil unit also includes a joint, wherein:

[0010] The first communication ports of the two heat exchange coils are connected to the refrigerant flow path and the water flow path provided on the air conditioner through one joint; and / or,

[0011] The second communication ports of the two heat exchange coil parts are connected to the refrigerant flow path and the water flow path provided on the air conditioner through one joint.

[0012] Optionally, the connector includes:

[0013] A concentrating head, wherein two first flow chambers are formed in intervals, and the two first flow chambers are connected to the two heat exchange coil parts; and

[0014] The fork head includes a main body and two branch pipe parts connected to the main body. Two second flow chambers are formed in the main body. The two second flow chambers are respectively connected to the inner chambers of the two branch pipe parts. The main body is connected to the central head so that the two first flow chambers are correspondingly connected to the two second flow chambers. Each branch pipe part is used to simultaneously connect the refrigerant flow path and the water flow path provided on the air conditioner.

[0015] Optionally, the concentrating head is connected to the two heat exchange coil sections by welding.

[0016] Optionally, a fan is further provided in the shell, and the heat exchange coil is located on one side of the air outlet end of the fan and is arranged adjacent to the air outlet.

[0017] Optionally, a temperature sensor is provided at the air outlet.

[0018] Optionally, an electric valve body is also included, and the electric valve body includes:

[0019] A valve housing, wherein a first valve port, a second valve port and a third valve port are provided on the circumference of the valve housing, wherein the first valve port and the second valve port are used to be connected to a refrigerant flow path and a water flow path on the air conditioner, respectively, and the third valve port is connected to the heat exchange coil; and,

[0020] The valve core is rotatably installed in the valve housing, and the third valve port is switched to communicate with one of the first valve port and the second valve port, so that the refrigerant and water can flow alternately in the heat exchange coil.

[0021] Optionally, an electric heating component is further provided in the shell to dry liquid droplets remaining in the heat exchange coil.

[0022] Optionally, the heat exchange coil comprises a coil body and a side plate arranged on the coil body, and a mounting shaft is rotatably connected to the side plate;

[0023] The electric heating component comprises a heating belt, which is at least partially connected to the mounting shaft. During the rotation stroke of the mounting shaft, the heating belt can be wound and stored on the mounting shaft, and can be flattened and covered on the coil body.

[0024] The present invention also provides an air conditioner, comprising the fan coil unit as described in any one of the above items.

[0025] Optionally, a plurality of fan coil units are provided.

[0026] Optionally, the air conditioner also includes a main unit, in which a refrigerant flow path and a water flow path are formed, two refrigerant connecting ports are formed on the refrigerant flow path, and the two refrigerant connecting ports respectively correspond to the two ends of one of the heat exchange coil parts, and two water flow connecting ports are formed on the water flow path, and the two water flow connecting ports respectively correspond to the two ends of the other heat exchange coil part.

[0027] The present invention also provides a control method for an air conditioner, based on the above air conditioner, a refrigerant flow control component is provided on the refrigerant flow path, a water flow control component is provided on the water flow path, and the two heat exchange coil parts include a first heat exchange coil part for circulating refrigerant and a second heat exchange coil part for circulating water;

[0028] The control method of the air conditioner comprises the following steps:

[0029] After the air conditioner enters the self-cleaning mode, controlling the water flow control component to operate so as to drain the water in the second heat exchange coil unit;

[0030] Controlling the refrigerant flow control component to operate so that the refrigerant can enter the first heat exchange coil section in a liquid state and radiate cold energy to the second heat exchange coil section to form frost on the first heat exchange coil section and the second heat exchange coil section;

[0031] After the frosting completion condition is met, controlling the refrigerant flow control component and / or the water flow control component to operate so as to defrost the first heat exchange coil section and the second heat exchange coil section;

[0032] After the defrosting completion condition is met, the self-cleaning mode is exited.

[0033] Optionally, before controlling the water flow control component to operate to drain the water in the second heat exchange coil unit, the method further includes:

[0034] Acquire the current operating mode of the air conditioner and the current temperature parameter at the air outlet of the fan coil unit;

[0035] Determining a preset temperature parameter at an air outlet of the fan coil unit according to a current operating mode of the air conditioner;

[0036] After the current temperature parameter and the preset temperature parameter meet the self-cleaning condition, the air conditioner is controlled to enter the self-cleaning mode.

[0037] Optionally, the operation mode of the air conditioner includes a heating operation mode;

[0038] Before controlling the air conditioner to enter the self-cleaning mode, the method further comprises:

[0039] When the current temperature parameter is less than the preset temperature parameter, the self-cleaning condition is met.

[0040] Optionally, the operation mode of the air conditioner includes a heating mode;

[0041] Before exiting the self-cleaning mode, the method further includes:

[0042] When the current temperature parameter is greater than or equal to the preset temperature parameter, the defrosting completion condition is met.

[0043] In the fan coil provided by the present invention, the heat exchange coil is arranged in the shell, and the heat exchange coil controls the temperature of the heat exchange coil by circulating refrigerant and water in the heat exchange coil part. When the fan coil needs to be cleaned, the heat exchange coil is cooled down by controlling the temperature of the refrigerant to condense and frost on the fan coil, and dust is crystallized on the heat exchange coil. After defrosting, the dust and other stains on the heat exchange coil are carried away by the flow of water after defrosting, thereby realizing self-cleaning of the fan coil without the need for additional cleaning devices, and the cleaning method is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0045] Figure 1 A three-dimensional schematic diagram of an embodiment of a fan coil unit provided by the present invention;

[0046] Figure 2 for Figure 1 A three-dimensional schematic diagram of a connector according to an embodiment of the present invention;

[0047] Figure 3 for Figure 2 A schematic cross-sectional view of a joint in FIG.

[0048] Figure 4 for Figure 1 A schematic structural diagram of an electric valve body according to another embodiment of the present invention;

[0049] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the electric valve body;

[0050] Figure 6 for Figure 1 Schematic diagram of the structure of the heat exchange coil;

[0051] Figure 7 for Figure 6 A schematic diagram of the partially enlarged structure of the heat exchange coil;

[0052] Figure 8 This is a flowchart of the control method of the air conditioner provided by the present invention.

[0053] Description of Figure Numbers:

[0054]

[0055]

[0056] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of 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.

[0058] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0059] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0060] The fan coil unit is used to exchange heat with the indoor environment and adjust the temperature of the indoor environment. The air outlet of the fan coil unit is close to the indoor environment, so the fan coil part on the air outlet side is easily exposed to dust, resulting in a poor final heating effect.

[0061] In order to remove dust from fan coil units, common fan coil unit self-cleaning technologies include mechanical dust removal, spray dust removal, etc., to clean the dust attached to the surface of the flexible filter layer. However, the existing self-cleaning technology has an increased number of parts, low reliability, high cost, and dust is easily accumulated between components, posing a risk of failure.

[0062] See also Figure 1 The present invention provides a fan coil unit 100 for an air conditioner, wherein the fan coil unit 100 comprises a shell 1 and a heat exchange coil unit 2; the shell 1 is formed with an air inlet and an air outlet; the heat exchange coil unit 2 is arranged in the shell 1, and an air flow is introduced from the air inlet, passes through the heat exchange coil unit 2 for heat exchange, and is blown out from the air outlet; wherein the heat exchange coil unit 2 comprises two heat exchange coil units for respectively circulating refrigerant and water, or the heat exchange coil unit 2 can alternately circulate refrigerant and water.

[0063] In the fan coil 100 provided by the present invention, the heat exchange coil 2 is arranged in the shell 1. The heat exchange coil 2 controls the temperature of the heat exchange coil 2 by circulating refrigerant and water in the heat exchange coil part. When the fan coil 100 needs to be cleaned, the temperature of the heat exchange coil 2 is controlled by controlling the temperature of the refrigerant to condense and frost on the fan coil 100, and dust is crystallized on the heat exchange coil 2. After defrosting, the dust and other stains on the heat exchange coil 2 are carried away by the flow of water after defrosting, thereby realizing self-cleaning of the fan coil without the need for additional cleaning devices, and the cleaning method is more reliable.

[0064] It should be noted that the heat exchange coil 2 includes two heat exchange coil parts. In one embodiment, refrigerant and water flow through the two heat exchange coil parts respectively. During operation, refrigerant and water can exist in the two heat exchange coil parts at the same time.

[0065] In another embodiment of the present application, the same medium flows through the two heat exchange coil sections at the same time, and the refrigerant and water are circulated in an alternating manner, and only one medium flows at the same time to control the temperature of the heat exchange coil 2.

[0066] It should be noted that, in the two heat exchange coil sections, each of the heat exchange coil sections may include multiple heat exchange pipes to ensure the reliability of the temperature control of the circulating liquid, wherein the two heat exchange coil sections are merely a classification of the multiple heat exchange pipes, and are not limited to two different pipe systems with clear differences in the heat exchange coil 2.

[0067] Furthermore, in the first embodiment provided by the present invention, each of the heat exchange coil units includes a first connecting port and a second connecting port, and the fan coil unit 100 also includes a joint 3, wherein the first connecting ports of the two heat exchange coil units are connected to the refrigerant flow path and the water flow path provided on the air conditioner through one joint 3. In this embodiment, the two heat exchange coil units are simultaneously connected to the refrigerant flow path and the water flow path through the joint 3, and the connection of the refrigerant flow path and the water flow path is controlled by switching the joint 3, and the circulation control of the two heat exchange coil units is simultaneously realized through one joint 3, which makes the operation more convenient.

[0068] It should be noted that, in this embodiment, the first connecting port and the second connecting port respectively form the inlet and outlet of the pipeline, and the on-off of the heat exchange coil part can be controlled by controlling the on-off of the inlet or the outlet.

[0069] In addition, in this embodiment, one connector 3 connects two of the first connecting ports at the same time, and the two first connecting ports are connected to the refrigerant and water respectively through one connector 3, so that different types of liquids are respectively contained in the two heat exchange coils. During use, the temperature can be controlled by the refrigerant and water at the same time, or only the refrigerant or only water can be selected to control the temperature of the heat exchange coil 2.

[0070] Similarly, in this embodiment, the second communication ports of the two heat exchange coils are connected to the refrigerant flow path and the water flow path provided on the air conditioner through one connector 3. Regardless of which end of the heat exchange coil is opened and closed, the connection control of the refrigerant flow path and the water flow path can be achieved, as long as the connection control of the two different heat exchange coils can be performed through one connector 3.

[0071] It should be noted that the first connecting port and the second connecting port of the heat exchange coil unit may be provided with the connector 3 respectively or simultaneously, and no specific limitation is made here, as long as the heat exchange coil unit can be switched on and off.

[0072] It is obvious that in order to facilitate the joint 3 to control the on-off of the two heat exchange coil parts respectively, at least two independently arranged passages need to be formed in the joint 3 to facilitate the flow control of the two heat exchange coil parts respectively; for example, two pipe sections designed in parallel can be directly connected to the two heat exchange coil parts respectively, so as to realize that one joint connects the two heat exchange coil parts respectively.

[0073] For further information, see Figures 2 to 3In the specific embodiment provided by the present invention, the joint 3 includes a central head 31 and a fork head 32; the central head 31 has two first flow cavities formed therein, and the two first flow cavities are connected to the two heat exchange coil parts; the fork head 32 includes a main body and two branch pipe parts connected to the main body, and two second flow cavities are formed in the main body, and the two second flow cavities are respectively connected to the inner cavities of the two branch pipe parts. The main body is connected to the central head 31 so that the two first flow cavities are connected to the two second flow cavities correspondingly, and each branch pipe part is used to simultaneously connect the refrigerant flow path and the water flow path provided on the air conditioner. In this embodiment, the two branch pipe parts of the fork head 31 are respectively connected to the refrigerant flow path and the water flow path, the two second flow chambers in the main body of the fork head 31 are respectively connected to the two branch pipe parts, and the two second flow chambers are respectively connected to the two first flow chambers of the concentrating head 31, realizing a Y-shaped joint structure, so that the two ends of a joint 3 can be connected to the refrigerant flow path and the water flow path at the same time without interfering with each other; the joint 3 forms a Y-shaped structure through the concentrating head 31 and the fork head 32, and the structure is more compact.

[0074] The concentrated header 31 needs to be installed on the heat exchange coil 2. There are multiple connection methods between the concentrated header and the heat exchange coil 2, such as threaded connection.

[0075] Furthermore, the centralizing head 31 is connected to the two heat exchange coils by welding. In this embodiment, the connection quality is ensured by welding, and leakage between the centralizing head 31 and the two heat exchange coils is avoided.

[0076] It should be noted that, in this embodiment, an on-off valve is provided in the connector 3 to control the on-off of the connector 3 .

[0077] On the other hand, a fan 4 is further provided in the housing 1, and the heat exchange coil 2 is located on one side of the air outlet end of the fan 4 and is arranged adjacent to the air outlet. In this embodiment, the wind blown by the fan 4 passes through the heat exchange coil 2, and then generates heat exchange with the heat exchange coil 2, generating airflows of different temperatures at the air outlet.

[0078] On the other hand, a temperature sensor is provided at the air outlet to detect the outlet air temperature of the fan coil unit 100 .

[0079] In the first embodiment provided by the present invention, refrigerant and water flow through the two heat exchange coil parts respectively, so that temperature control can be achieved synchronously through the two liquids at the same time.

[0080] In another embodiment provided by the present invention, please refer to Figures 4 to 5The fan coil 100 also includes an electric valve body 5, which includes a valve housing 51 and a valve core 52; the valve housing 51 is provided with a first valve port, a second valve port and a third valve port on the circumference thereof, wherein the first valve port and the second valve port are used to be respectively connected to the refrigerant flow path and the water flow path on the air conditioner, and the third valve port is connected to the heat exchange coil 2; the valve core 52 is rotatably installed in the valve housing 51, and the third valve port is switched to be connected to one of the first valve port and the second valve port, so that the refrigerant and water can flow alternately in the heat exchange coil 2. In this embodiment, the electric valve body is used to allow only refrigerant or water to flow alternately in the heat exchange coil 2. When the refrigerant is connected, the water will be disconnected and cannot be connected to the heat exchange coil 2. Similarly, when the water is connected, the refrigerant cannot enter the heat exchange coil 2, and the control is simpler.

[0081] During use, when the valve core 52 rotates to connect the heat exchange coil 2 with the refrigerant flow path, refrigerant flows in both heat exchange coil parts, so that the temperature of the entire heat exchange coil 2 is controlled by the refrigerant; and when the valve core 52 rotates to connect the heat exchange coil 2 with the water flow path, only water flows in the entire heat exchange coil 2, and different cooling effects are produced by different circulating liquids. The switching of the circulating liquid in the heat exchange coil 2 is achieved by switching the valve, and the structure is simple.

[0082] It should be noted that, among the two implementations of the connector 3 and the electric valve body 5, only one can be selected for implementation, and no specific limitation is made in the present invention.

[0083] On the other hand, an electric heating component is also provided in the housing 1 to dry the liquid droplets remaining in the heat exchange coil. In this embodiment, the heat exchange coil 2 is prevented from having refrigerant or water remaining therein, which may cause the refrigerant or water to mix during temperature control, or the refrigerant or water in the pipe is not drained, resulting in poor temperature control effect; at the same time, when the fan coil 100 is required for heating, the electric heating component may be controlled for auxiliary heating to increase the heating speed and reduce the energy required by the air conditioner system during heating.

[0084] It should be noted that, in the present embodiment, the electric heating component is disposed close to the heat exchange coil 2 so as to better heat and dry the heat exchange coil 2 .

[0085] In the embodiment provided by the present invention, when the refrigerant and water are circulated through the two heat exchange coil parts respectively, the electric heating component can quickly dry the water in the heat exchange coil part, so that when the refrigerant is subjected to low-temperature cooling, the water freezes in the pipe and causes damage to the pipe; and in another embodiment, when the two heat exchange coil parts are used to alternately circulate refrigerant and water, the pipe is dried by the electric heating component before alternating to avoid mixing between the refrigerant and water, which may cause damage to subsequent air-conditioning components such as compression during operation.

[0086] It should be noted that there are multiple implementations of the electric heating component, such as directly using an electric heating wire to heat and dry the heat exchange coil 2.

[0087] Specifically, in this embodiment, please refer to Figure 6 to Figure 7 The heat exchange coil 2 includes a coil body 21 and a side plate 22 provided on the coil body 21, and a mounting shaft 23 is rotatably connected to the side plate 22; the electric heating assembly includes a heating belt 6, and the heating belt 6 is at least partially connected to the mounting shaft 23. During the rotation stroke of the mounting shaft 23, the heating belt 6 can be rolled up and stored on the mounting shaft 23, and can be flattened and covered on the coil body 21. In this embodiment, the heating belt 6 can be rolled up and stored, and can be unfolded when needed and rolled up when heating is not needed, thereby saving installation space and avoiding damage to the heating belt 6.

[0088] It should be noted that, in the present embodiment, the heating belt 6 is made of a flexible material. When heating is required, the heating belt 6 is unfolded to cover the coil body by rotating the mounting shaft 23 to heat the coil body. In order to facilitate the unfolding and covering of the heating belt 6, one end of the heating belt is connected to the mounting shaft 23, and the other end is connected to the coil body through an elastic member. During the rotation of the mounting shaft 23, the elastic member automatically pulls the heating belt 6 onto the coil body.

[0089] There are many implementations of the elastic member, for example, the heating belt 6 can be pulled by elastic ropes and other components.

[0090] In this embodiment, the refrigerant has a variety of implementations, as long as it can achieve compression and expansion of the air conditioner, and absorb and release heat, for example, using fluorine as the refrigerant, and no specific limitation is made here.

[0091] Based on the above-mentioned fan coil unit 100, the present invention also provides an air conditioner, which includes the above-mentioned fan coil unit 100, that is, it has all the technical features of the above-mentioned fan coil unit 100, and therefore, it also has the technical effects brought by all the above-mentioned technical features, which will not be described one by one here.

[0092] Furthermore, the fan coil unit 100 is provided in plurality, so as to improve the temperature control effect of the air conditioner.

[0093] On the other hand, in the embodiment provided by the present invention, the air conditioner further comprises a host, a refrigerant flow path and a water flow path are formed in the host, two refrigerant communication ports are formed on the refrigerant flow path, and the two refrigerant communication ports correspond to the two ends of one of the heat exchange coil parts, and two water flow communication ports are formed on the water flow path, and the two water flow communication ports correspond to the two ends of another heat exchange coil part. In this embodiment, the temperature control of the fan coil 100 is achieved by controlling the refrigerant flow path and the water flow path through the host.

[0094] It should be noted that, in another embodiment provided by the present invention, the two refrigerant connecting ports correspond to the two ends of the two heat exchange coil parts, and the two water flow connecting ports also correspond to the two ends of the two heat exchange coil parts. By controlling the connection between the refrigerant flow path and the water flow path, the alternating connection of the refrigerant and water is achieved.

[0095] The air conditioner further includes a control device, which includes a memory, a processor, and a control program of the air conditioner stored in the memory, and the processor executes the control program of the air conditioner to implement the following air conditioner control method:

[0096] After the air conditioner enters the self-cleaning mode, controlling the water flow control component to operate so as to drain the water in the second heat exchange coil unit;

[0097] Controlling the refrigerant flow control component to operate so that the refrigerant can enter the first heat exchange coil section in a liquid state and radiate cold energy to the second heat exchange coil section to form frost on the first heat exchange coil section and the second heat exchange coil section;

[0098] After the frosting completion condition is met, controlling the refrigerant flow control component and / or the water flow control component to operate so as to defrost the first heat exchange coil section and the second heat exchange coil section;

[0099] After the defrosting completion condition is met, the self-cleaning mode is exited.

[0100] Optionally, before controlling the water flow control component to operate to drain the water in the second heat exchange coil unit, the method further includes:

[0101] Acquire the current operating mode of the air conditioner and the current temperature parameter at the air outlet of the fan coil unit;

[0102] Determining a preset temperature parameter at an air outlet of the fan coil unit according to a current operating mode of the air conditioner;

[0103] After the current temperature parameter and the preset temperature parameter meet the self-cleaning condition, the air conditioner is controlled to enter the self-cleaning mode.

[0104] Optionally, the operation mode of the air conditioner includes a heating operation mode;

[0105] Before controlling the air conditioner to enter the self-cleaning mode, the method further comprises:

[0106] When the current temperature parameter is less than the preset temperature parameter, the self-cleaning condition is met.

[0107] Optionally, the operation mode of the air conditioner includes a heating mode;

[0108] Before exiting the self-cleaning mode, the method further includes:

[0109] When the current temperature parameter is greater than or equal to the preset temperature parameter, the defrosting completion condition is met.

[0110] In the control device of the air conditioner provided by the present invention, the temperature of the fan coil is controlled by the circulation of refrigerant and water, wherein frost is formed on the fan coil by controlling the on and off of the refrigerant and water, and further, dust on the fan coil is removed by defrosting to ensure the cleanliness of the fan coil.

[0111] See also Figure 8 Based on the above-mentioned air conditioner, the present invention also provides a control method for an air conditioner, wherein it should be noted that a refrigerant flow control component is provided on the refrigerant flow path, and a water flow control component is provided on the water flow path. The two heat exchange coil parts include a first heat exchange coil part for circulating refrigerant and a second heat exchange coil part for circulating water. In this embodiment, the two heat exchange coil parts circulate refrigerant and water respectively, and the communication of the liquid in the heat exchange coil part is controlled by the refrigerant flow control component and the water flow control component respectively.

[0112] The control method of the air conditioner comprises the following steps:

[0113] S10, after the air conditioner enters the self-cleaning mode, controlling the water flow control component to operate so as to drain the water in the second heat exchange coil unit;

[0114] Among them, after the air conditioner enters the self-cleaning mode, it is necessary to perform cooling and other operations. Therefore, in order to avoid the freezing of water in the second heat exchange coil part and cause damage to the pipeline, after entering the self-cleaning mode, the water is first drained to ensure the smooth progress of the self-cleaning mode and protect the safety of the air conditioner.

[0115] S20, controlling the refrigerant flow control component to operate so that the refrigerant can enter the first heat exchange coil unit in a liquid state and radiate cold energy to the second heat exchange coil unit to form frost on the first heat exchange coil unit and the second heat exchange coil unit;

[0116] Among them, after draining the water, rapid cooling is achieved by transporting refrigerant into the second heat exchange coil part, and a large amount of cold can be generated to smoothly frost the first heat exchange coil part and the second heat exchange coil part, and the dust on the first heat exchange coil part and the second heat exchange coil part is wrapped in frost. At the same time, nearby dust can also be condensed on the first heat exchange coil part and the second heat exchange coil part, so as to facilitate cleaning of the air conditioner.

[0117] S30, after the frosting completion condition is met, controlling the refrigerant flow control component and / or the water flow control component to operate so as to defrost the first heat exchange coil unit and the second heat exchange coil unit;

[0118] After the first heat exchange coil part and the second heat exchange coil part are completely frosted, the refrigeration can be stopped so that the frost begins to melt and the dust fixed on the frost is discharged along with the thawed water flow.

[0119] S40: After the defrosting completion condition is met, exit the self-cleaning mode.

[0120] When defrosting is completely completed and the frost on the first heat exchange coil unit and the second heat exchange coil unit disappears, the fan coil unit is cleaned and the self-cleaning mode can be exited.

[0121] In the control method of the air conditioner provided by the present invention, there is no need to set an additional cleaning device on the fan coil unit. The dust on the fan coil unit is fixed by frosting and thawing and discharged along the thawed water flow to clean the fan coil unit. The fan coil unit can be automatically cleaned and self-started, which is convenient for the maintenance of the air conditioner and ensures the cleanliness of the fan coil unit.

[0122] It should be noted that, in the present embodiment, the two heat exchange coil parts flow refrigerant and water respectively, which can realize the self-cleaning of the fan coil and also avoid the irritation of human skin by cooling air. When rapid cooling is required, the flow rate of the refrigerant can be adjusted to achieve a rapid cooling effect. When rapid cooling is not required, the flow rate of the refrigerant can be reduced and the flow rate of the water can be increased to adjust the temperature and humidity. When the temperature tends to be stable, the refrigerant and water can be turned off.

[0123] When rapid heating is required, the flow of the refrigerant can be adjusted to heat the water side simultaneously. When rapid heating is not required, the flow of the refrigerant and water sides can be adjusted to achieve a balance.

[0124] It is obvious that in an air conditioner in which the refrigerant flow path and the water flow path are both connected to the same heat exchange coil and the temperature of the fan coil is controlled by alternately connecting them, the same control method of the air conditioner can also be adopted, wherein the first heat exchange coil part and the second heat exchange coil part are the same coil.

[0125] Furthermore, before step S10, the method further includes:

[0126] S01, obtaining the current operating mode of the air conditioner and the current temperature parameter at the air outlet of the fan coil unit;

[0127] Among them, after dust accumulates on the fan coil unit, the temperature control accuracy will decrease due to the obstruction of dust during temperature control. Therefore, by detecting the temperature of the air outlet of the fan coil unit, it can be determined whether the fan coil unit has a dust accumulation problem under normal working conditions.

[0128] S02, determining a preset temperature parameter at the air outlet of the fan coil unit according to the current working mode of the air conditioner;

[0129] Among them, after determining the working operation mode, the temperature at the air outlet in this mode can be determined. This temperature corresponds to the working mode of the air conditioner, and the preset temperature parameters are obtained. The preset temperature parameters are used as a reference to facilitate normal judgment of the current operating mode.

[0130] S03. After the current temperature parameter and the preset temperature parameter satisfy a self-cleaning condition, control the air conditioner to enter a self-cleaning mode.

[0131] By comparing the current temperature parameter with the preset temperature parameter, the current state can be judged.

[0132] In the control method of the air conditioner provided by the present invention, the entry into the self-cleaning mode is determined by judging the temperature. The implementation is simple, and there is no need to set up too much dust judgment, etc. The accuracy is high, and real-time monitoring can be achieved. The self-cleaning mode can be entered autonomously each time it is running, and there is no need for manual judgment, control and other operations.

[0133] Specifically, the operation mode of the air conditioner includes a heating operation mode; before step S03, the method further includes:

[0134] When the current temperature parameter is less than the preset temperature parameter, the self-cleaning condition is met.

[0135] In this embodiment, when heating is performed, due to the obstruction of dust, the heat cannot be completely blown out of the air outlet by the wind of the fan. Therefore, the temperature of the air outlet during heating will be lower than the set preset temperature parameter. At this time, it can be determined that cleaning is needed.

[0136] It should be noted that, in this embodiment, a temperature difference is formed between the current temperature parameter and the preset temperature parameter. When the temperature difference is greater than the preset difference, the self-cleaning mode is entered to facilitate more accurate judgment and avoid frequent activation of the self-cleaning mode due to fluctuations in the internal operation of the air conditioner, which results in a deterioration in the normal heating effect.

[0137] In addition, the operation mode of the air conditioner includes a heating mode; before step S40, the step further includes:

[0138] When the current temperature parameter is greater than or equal to the preset temperature parameter, the defrosting completion condition is met.

[0139] In this embodiment, after self-cleaning, heating and defrosting will be performed. At this time, hot air will be discharged from the air outlet, and a preset temperature parameter will correspond to the hot air and the heating temperature. When the outlet temperature during defrosting is greater than or equal to the preset temperature parameter, it means that the dust and water droplets on the fan coil unit are completely removed, so that the heating effect reaches the optimal value. Therefore, it can be judged that the cleaning has been completed and can be exited.

[0140] When the current temperature parameter is still less than the preset temperature parameter, the self-cleaning mode is entered again, and cleaning is repeated again until the current temperature parameter is greater than or equal to the preset temperature parameter.

[0141] It should be noted that, in this embodiment, the operating mode of the air conditioner also includes a cooling mode. In the cooling mode, it is only necessary to determine whether the current temperature parameter is greater than the preset temperature parameter to determine whether the self-cleaning condition is met, which is the same as the heating mode and will not be repeated here.

[0142] In the air conditioner control method provided by the present invention, before step S20, the method further includes:

[0143] The electric heating component is controlled to heat and dry the second heat exchange coil to dry the water vapor in the second heat exchange coil.

[0144] In this embodiment, the water vapor in the second heat coil portion is completely emptied by the electric heating component to prevent the condensation of water vapor, which causes the temperature control effect to be reduced due to the specific heat of water vapor when the pipeline is subsequently cooled or heated.

[0145] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fan coil unit for an air conditioner, characterized in that: The fan coil unit comprises: a housing, formed with an air inlet and an air outlet; and, The heat exchange coil is arranged in the shell, and the airflow is introduced from the air inlet, passes through the heat exchange coil for heat exchange, and then blown out from the air outlet; The heat exchange coil comprises two heat exchange coil parts for circulating refrigerant and water respectively, or the heat exchange coil can alternately circulate refrigerant and water.

2. The fan coil unit according to claim 1, characterized in that: Each of the heat exchange coil units includes a first communication port and a second communication port, and the fan coil unit also includes a joint, wherein: The first communication ports of the two heat exchange coils are connected to the refrigerant flow path and the water flow path provided on the air conditioner through one joint; and / or, The second communication ports of the two heat exchange coil parts are connected to the refrigerant flow path and the water flow path provided on the air conditioner through one joint.

3. The fan coil unit according to claim 2, characterized in that: The connector comprises: A concentrating head, wherein two first flow chambers are formed in intervals, and the two first flow chambers are connected to the two heat exchange coil parts; and The fork head includes a main body and two branch pipe parts connected to the main body. Two second flow chambers are formed in the main body. The two second flow chambers are respectively connected to the inner chambers of the two branch pipe parts. The main body is connected to the central head so that the two first flow chambers are correspondingly connected to the two second flow chambers. Each branch pipe part is used to simultaneously connect the refrigerant flow path and the water flow path provided on the air conditioner.

4. The fan coil unit according to claim 3, characterized in that: The concentrating head is connected to the two heat exchange coil parts by welding.

5. The fan coil unit according to claim 1, characterized in that: A fan is also arranged in the shell, and the heat exchange coil is located on one side of the air outlet end of the fan and is arranged adjacent to the air outlet.

6. The fan coil unit according to claim 1, characterized in that: A temperature sensor is provided at the air outlet.

7. The fan coil unit according to claim 1, characterized in that: It also includes an electric valve body, the electric valve body comprising: A valve housing, wherein a first valve port, a second valve port and a third valve port are provided on the circumference of the valve housing, wherein the first valve port and the second valve port are used to be connected to a refrigerant flow path and a water flow path on the air conditioner, respectively, and the third valve port is connected to the heat exchange coil; and, The valve core is rotatably installed in the valve housing, and the third valve port is switched to communicate with one of the first valve port and the second valve port, so that the refrigerant and water can flow alternately in the heat exchange coil.

8. The fan coil unit according to claim 1, characterized in that: An electric heating component is also provided in the shell to dry the liquid droplets remaining in the heat exchange coil.

9. The fan coil unit according to claim 8, characterized in that: The heat exchange coil comprises a coil body and a side plate arranged on the coil body, and a mounting shaft is rotatably connected to the side plate; The electric heating component comprises a heating belt, which is at least partially connected to the mounting shaft. During the rotation stroke of the mounting shaft, the heating belt can be wound and stored on the mounting shaft, and can be flattened and covered on the coil body.

10. An air conditioner, characterized in that: Comprising the fan coil unit as described in any one of claims 1 to 9.

11. The air conditioner according to claim 10, characterized in that: The fan coil unit is provided in plurality.

12. The air conditioner according to claim 10, characterized in that: The air conditioner also includes a main unit, in which a refrigerant flow path and a water flow path are formed. Two refrigerant connecting ports are formed on the refrigerant flow path, and the two refrigerant connecting ports respectively correspond to the two ends of one of the heat exchange coil parts. Two water flow connecting ports are formed on the water flow path, and the two water flow connecting ports respectively correspond to the two ends of the other heat exchange coil part.

13. A method for controlling an air conditioner, based on the air conditioner according to claim 12, characterized in that: A refrigerant flow control component is provided on the refrigerant flow path, a water flow control component is provided on the water flow path, and the two heat exchange coil parts include a first heat exchange coil part for circulating refrigerant and a second heat exchange coil part for circulating water; The control method of the air conditioner comprises the following steps: After the air conditioner enters the self-cleaning mode, controlling the water flow control component to operate so as to drain the water in the second heat exchange coil unit; Controlling the refrigerant flow control component to operate so that the refrigerant can enter the first heat exchange coil section in a liquid state and radiate cold energy to the second heat exchange coil section to form frost on the first heat exchange coil section and the second heat exchange coil section; After the frosting completion condition is met, controlling the refrigerant flow control component and / or the water flow control component to operate so as to defrost the first heat exchange coil section and the second heat exchange coil section; After the defrosting completion condition is met, the self-cleaning mode is exited.

14. The control method of the air conditioner according to claim 13, characterized in that: Before controlling the water flow control component to drain the water in the second heat exchange coil unit, the method further includes: Acquire the current operating mode of the air conditioner and the current temperature parameter at the air outlet of the fan coil unit; Determining a preset temperature parameter at an air outlet of the fan coil unit according to a current operating mode of the air conditioner; After the current temperature parameter and the preset temperature parameter meet the self-cleaning condition, the air conditioner is controlled to enter the self-cleaning mode.

15. The control method of the air conditioner according to claim 14, characterized in that: The operation mode of the air conditioner includes a heating operation mode; Before controlling the air conditioner to enter the self-cleaning mode, the method further comprises: When the current temperature parameter is less than the preset temperature parameter, the self-cleaning condition is met.

16. The method for controlling an air conditioner according to claim 13, wherein: The operation mode of the air conditioner includes a heating mode; Before exiting the self-cleaning mode, the method further includes: When the current temperature parameter is greater than or equal to the preset temperature parameter, the defrosting completion condition is met.

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