Air conditioning apparatus and control method thereof

Abstract

The application relates to the air conditioning technical field, in particular to an air conditioning device and a control method thereof. The air conditioning device comprises a shell-tube condenser, a refrigerant circulation system and a cooling liquid circulation system. The shell-tube condenser has a first tube pass and a second tube pass. The refrigerant circulation system is communicated with the first tube pass. The refrigerant circulation system comprises a compressor, a throttling device and a fin evaporator. The refrigerant in the refrigerant circulation system flows through the compressor, the first tube pass, the throttling device and the fin evaporator in sequence and returns to the compressor. The cooling liquid circulation system is communicated with the second tube pass. The cooling liquid circulation system comprises a cold source unit, a pre-cooling surface air cooler and a reheating surface air cooler. The inlet air flow flows through the pre-cooling surface air cooler, the fin evaporator and the reheating surface air cooler in sequence and forms outlet air flow. The air conditioning device can realize independent control of temperature and humidity and effectively improves the precision of outlet air temperature and humidity control.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly to an air conditioning device and a control method thereof. BACKGROUND

[0002] In the current fresh air dehumidifier, the fresh air exchanges heat with the heat exchanger in the following order: pre-cooling surface cooler → evaporator → air-cooled condenser, and then is sent to the indoor. The fresh air exchanges heat with the pre-cooling surface cooler first to reduce the temperature, and the pre-cooling surface cooler bears part of the sensible heat load. Then, the fresh air exchanges heat with the evaporator again to reduce the temperature and complete dehumidification. At this time, the temperature of the fresh air is lower than the original temperature of the indoor. In order to keep the temperature of the indoor constant, the fresh air needs to pass through the air-cooled condenser to rise to an appropriate temperature, and then is sent to the indoor. In this process, only the air-cooled condenser is used for reheat recovery and temperature rise. The processes of the upstream and the downstream affect each other, the control precision is not high, and the complete independent control of temperature and humidity cannot be effectively achieved. SUMMARY

[0003] The purpose of the present application is to provide an air conditioning device and a control method thereof, which can achieve independent control of temperature and humidity and effectively improve the precision of the control of the temperature and humidity of the supply air.

[0004] To this end, an air conditioning device is provided in the embodiments of the present application. The air conditioning device comprises: a shell-tube condenser having a first tube pass and a second tube pass; a refrigerant circulation system in communication with the first tube pass, the refrigerant circulation system comprising a compressor, a throttling device and a finned evaporator, refrigerant in the refrigerant circulation system flowing through the compressor, the first tube pass, the throttling device and the finned evaporator in sequence, and returning to the compressor; and a cooling liquid circulation system in communication with the second tube pass, the cooling liquid circulation system comprising a cold source unit, a pre-cooling surface cooler and a reheating surface cooler, cooling liquid in the cooling liquid circulation system flowing through the cold source unit, the pre-cooling surface cooler, the second tube pass and the reheating surface cooler in sequence, and returning to the cold source unit; wherein an air inlet flow passes through the pre-cooling surface cooler, the finned evaporator and the reheating surface cooler in sequence, and forms a supply air flow.

[0005] In a possible implementation, a first regulating valve is arranged between the second tube pass and the reheating surface cooler, and the first regulating valve is used to regulate the flow of the cooling liquid into the reheating surface cooler.

[0006] In a possible implementation, a regulating branch is arranged between the second tube pass and the cold source unit, the regulating branch is arranged in parallel with the reheating surface cooler, a second regulating valve is arranged on the regulating branch, and the second regulating valve is used to regulate the flow of the cooling liquid into the regulating branch.

[0007] In a possible implementation, the system further comprises a first temperature sensor configured to detect a temperature of the second tube pass output, and a second temperature sensor configured to detect a temperature of the reheat coil air input; wherein the first temperature sensor and the second temperature sensor are configured to control the opening degree of the first regulating valve and the second regulating valve via the controller.

[0008] In a possible implementation, the system further comprises a third temperature sensor configured to detect a temperature of the supply air flow, wherein the temperature detected by the third temperature sensor is compared with a set temperature range of the supply air flow to obtain a temperature adjustment indication, and the controller is configured to adjust the opening degree of the first regulating valve and the second regulating valve according to the temperature adjustment indication.

[0009] In a possible implementation, when the third temperature sensor detects that the temperature is lower than the set temperature range of the supply air flow, and the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor, the opening degree of the first regulating valve is controlled to increase, and the opening degree of the second regulating valve is controlled to decrease; and / or when the third temperature sensor detects that the temperature is lower than the set temperature range of the supply air flow, and the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, the opening degree of the first regulating valve is controlled to decrease, and the opening degree of the second regulating valve is controlled to increase.

[0010] In a possible implementation, when the third temperature sensor detects that the temperature is within the set temperature range of the supply air flow, the opening degree of the first regulating valve and the second regulating valve is kept unchanged.

[0011] In a possible implementation, when the third temperature sensor detects that the temperature is higher than the set temperature range of the supply air flow, and the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor, the opening degree of the first regulating valve is controlled to decrease, and the opening degree of the second regulating valve is controlled to increase; and / or when the third temperature sensor detects that the temperature is higher than the set temperature range of the supply air flow, and the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, the opening degree of the first regulating valve is controlled to increase, and the opening degree of the second regulating valve is controlled to decrease.

[0012] In a possible implementation, the refrigerant circulation system further comprises a temperature-increasing branch provided between the compressor and the throttling device, the temperature-increasing branch is provided in parallel with the first tube pass, and the temperature-increasing branch is provided with a reheat condenser and a third regulating valve, the third regulating valve is configured to regulate the refrigerant flow through the temperature-increasing branch, and the controller is configured to control the opening degree of the third regulating valve.

[0013] In a possible implementation, when the temperature detected by the third temperature sensor is lower than the set temperature range of the air supply flow, the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor, and the opening degree of the first regulating valve is maximum and the opening degree of the second regulating valve is minimum, the opening degree of the third regulating valve is controlled to increase; and / or when the temperature detected by the temperature sensor is lower than the set temperature range of the air supply flow, the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, and the opening degree of the first regulating valve is minimum and the opening degree of the second regulating valve is maximum, the opening degree of the third regulating valve is controlled to increase.

[0014] In a possible implementation, when the temperature detected by the third temperature sensor is within the set temperature range of the air supply flow, the opening degrees of the first regulating valve, the second regulating valve and the third regulating valve are kept unchanged.

[0015] In a possible implementation, when the temperature detected by the third temperature sensor is higher than the set temperature range of the air supply flow, the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor, and the opening degree of the first regulating valve is minimum and the opening degree of the second regulating valve is maximum, the opening degree of the third regulating valve is controlled to decrease; and / or when the temperature detected by the third temperature sensor is higher than the set temperature range of the air supply flow, the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, and the opening degree of the first regulating valve is maximum and the opening degree of the second regulating valve is minimum, the opening degree of the third regulating valve is controlled to decrease.

[0016] In a possible implementation, the air conditioning device further comprises a humidity sensor configured to detect the humidity of the air output end of the fin evaporator; wherein when the humidity detected by the humidity sensor is greater than a set humidity range, the power of the compressor is controlled to increase; when the humidity detected by the humidity sensor is less than the set humidity range, the power of the compressor is controlled to decrease; and when the humidity detected by the humidity sensor is within the set humidity range, the power of the compressor is kept unchanged.

[0017] In a possible implementation, the air conditioning device further comprises a humidity sensor configured to detect the humidity of the air output end of the fin evaporator; wherein when the humidity detected by the humidity sensor is greater than a set humidity range, the power of the compressor is controlled to increase; when the humidity detected by the humidity sensor is less than the set humidity range, the power of the compressor is controlled to decrease; and when the humidity detected by the humidity sensor is within the set humidity range, the power of the compressor is kept unchanged.

[0018] In a possible implementation, the cooling liquid circulation system of the air conditioning device comprises a first regulating valve arranged between the second tube pass of the shell-and-tube condenser and the reheating surface cooler, and configured to regulate the flow of the cooling liquid into the reheating surface cooler; and the reheating of the air dehumidified by the fin evaporator by the reheating surface cooler comprises regulating the opening degree of the first regulating valve to regulate the flow of the cooling liquid into the reheating surface cooler.

[0019] In a possible implementation, the second pipe passage and the cooling source unit of the cooling liquid circulation system are provided with an adjusting branch, the adjusting branch is provided in parallel with the reheating fin cooler, a second adjusting valve is arranged on the adjusting branch, and the second adjusting valve is used to adjust the flow of the cooling liquid entering the adjusting branch. The method further comprises adjusting the opening degrees of the first adjusting valve and the second adjusting valve, so as to adjust the flow of the cooling liquid entering the reheating fin cooler.

[0020] In a possible implementation, the control method further comprises: obtaining the temperature T1 of the air supply flow and comparing the temperature T1 with a set temperature range T2 of the air supply flow; obtaining the temperature T3 of the output end of the second pipe passage and the temperature T4 of the air input end of the reheating fin cooler; and adjusting the opening degrees of the first adjusting valve and the second adjusting valve comprises at least one of the following: if the temperature T1 is less than the temperature T2 and the temperature T3 is greater than the temperature T4, the opening degree of the first adjusting valve is increased by ΔP1, and the opening degree of the second adjusting valve is decreased by ΔP1; if the temperature T1 is less than the temperature T2 and the temperature T3 is less than the temperature T4, the opening degree of the first adjusting valve is decreased by ΔP1, and the opening degree of the second adjusting valve is increased by ΔP1; if the temperature T1 is within the temperature range T2, the opening degrees of the first adjusting valve and the second adjusting valve are kept unchanged; if the temperature T1 is greater than the temperature T2 and the temperature T3 is greater than the temperature T4, the first adjusting valve is closed, and the opening degree of the second adjusting valve is adjusted to the maximum; and if the temperature T1 is greater than the temperature T2 and the temperature T3 is less than the temperature T4, the opening degree of the first adjusting valve is increased by ΔP1, and the opening degree of the second adjusting valve is decreased by ΔP1.

[0021] In a possible implementation, the refrigerant circulation system comprises a cooling source unit, a precooling fin cooler, a reheating fin cooler, and a temperature increasing branch, the temperature increasing branch is provided in parallel with the first pipe passage of the shell-and-tube condenser, a reheating condenser and a third adjusting valve are arranged on the temperature increasing branch, and the third adjusting valve is used to adjust the flow of the refrigerant flowing through the temperature increasing branch; and the control method further comprises at least one of the following: if the temperature T1 is less than the temperature T2, the temperature T3 is greater than the temperature T4, and the opening degree of the first adjusting valve is the maximum and the opening degree of the second adjusting valve is the minimum, the opening degree of the third adjusting valve is increased by ΔP2; if the temperature T1 is less than the temperature T2, the temperature T3 is less than the temperature T4, and the opening degree of the first adjusting valve is the minimum and the opening degree of the second adjusting valve is the maximum, the opening degree of the third adjusting valve is increased by ΔP2; if the temperature T1 is greater than the temperature T2, the temperature T3 is greater than the temperature T4, and the opening degree of the first adjusting valve is the minimum and the opening degree of the second adjusting valve is the maximum, the opening degree of the third adjusting valve is decreased by ΔP2; if the temperature T1 is greater than the temperature T2, the temperature T3 is less than the temperature T4, and the opening degree of the first adjusting valve is the maximum and the opening degree of the second adjusting valve is the minimum, the opening degree of the third adjusting valve is decreased by ΔP2; and if the temperature T1 is within the temperature range T2, the opening degrees of the first adjusting valve, the second adjusting valve, and the third adjusting valve are kept unchanged.

[0022] In a possible implementation, the control method further comprises supply air humidity control, the supply air humidity control comprising at least one of the following: if the humidity W1 of the supply air flow is greater than a set humidity range W2 of the supply air flow, the compressor power of the air conditioning device is increased by AF; if W1 is less than W2, the compressor power is reduced by AF; if W1 is within W2, the power of the compressor is kept unchanged.

[0023] According to the air conditioning device and the control method thereof provided in the embodiments of the present application, the dehumidified gas is heated by the heat of the cooling liquid circulation system, compared with the prior art of dehumidifying and heating the gas by the refrigerant circulation system, the temperature and humidity can be independently controlled, and the precision of the supply air temperature and humidity control is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative labor.

[0026] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.

[0027] Figure 1 A principle schematic diagram of an air conditioning device provided in an embodiment of the present application is shown;

[0028] Figure 2 A principle schematic diagram of another air conditioning device provided in an embodiment of the present application is shown;

[0029] Figure 3 A principle schematic diagram of an air conditioning device provided in an embodiment of the present application is shown; Figure 1 A partial enlarged structure schematic diagram of the air conditioning device shown at A;

[0030] Figure 4 A flow block diagram of an air conditioning device control method provided in an embodiment of the present application is shown;

[0031] Figure 5 A flow block diagram of another air conditioning device control method provided in an embodiment of the present application is shown;

[0032] Figure 6Fig. 1 shows a schematic diagram of the principle of a conventional air conditioning apparatus.

[0033] Explanation of reference numerals:

[0034] 1. Shell-and-tube condenser

[0035] 2. Refrigerant circulation system; 21, compressor; 22, throttling device; 23, finned evaporator; 24, temperature raising branch; 25, reheat condenser; 26, third regulating valve

[0036] 3. Cooling water circulation system; 31, cooling source unit; 32, pre-cooling fin cooler; 33, reheat fin cooler; 34, first regulating valve; 35, regulating branch; 36, second regulating valve; 37, one-way valve

[0037] 4. First temperature sensor; 5, second temperature sensor; 6, third temperature sensor; 7, humidity sensor; 8, fan DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions, and superiorities of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based upon the embodiments in the present application, any other embodiments obtained by those ordinarily skilled in the art without creative effort belong to the scope of protection of the present application.

[0039] The following disclosure provides many different embodiments, or examples, for implementing different structures of the embodiments of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the embodiments of the present application. In addition, the reference numerals and / or letters can be repeatedly referred to in different examples in the embodiments of the present application. Such repetition is for the purpose of simplification and clarity, and it does not indicate the relationship between the various embodiments and / or settings discussed.

[0040] For the convenience of description, spatial relative terms can be used in the specification to describe the relative position relationship or movement condition of one element or feature relative to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", and the like. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over or reversed, or the orientation of the device is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be subsequently oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both upward and downward positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the specification are interpreted accordingly.

[0041] To solve the problems in the prior art, the present application provides an air conditioning device and a control method thereof, which can achieve independent control of temperature and humidity, and effectively improve the precision of air supply temperature and humidity control.

[0042] Figure 1 A schematic diagram of the principle of an air conditioning device provided by an embodiment of the present application is shown; Figure 2 A schematic diagram of the principle of another air conditioning device provided by an embodiment of the present application is shown; Figure 3 A schematic diagram of the principle of an air conditioning device provided by an embodiment of the present application is shown; Figure 1 A partial enlarged structural schematic diagram of the air conditioning device at A is shown; Figure 4 A flow chart of an air conditioning device control method provided by an embodiment of the present application is shown; Figure 5 A flow chart of another air conditioning device control method provided by an embodiment of the present application is shown.

[0043] As shown in the drawings, Figures 1-5 An air conditioning device provided by an embodiment of the present application is shown, which comprises a shell-and-tube condenser 1, a refrigerant circulation system 2, and a cooling liquid circulation system 3.

[0044] The shell-and-tube condenser 1 has a first tube pass and a second tube pass.

[0045] The refrigerant circulation system 2 communicates with the first tube pass, and the refrigerant circulation system 2 comprises a compressor 21, a throttling device 22, and a finned evaporator 23. The refrigerant in the refrigerant circulation system 2 flows through the compressor 21, the first tube pass, the throttling device 22, and the finned evaporator 23 in sequence, and returns to the compressor 21.

[0046] The cooling liquid circulation system 3 is in communication with the second tube pass, and the cooling liquid circulation system 3 comprises a cold source unit 31, a pre-cooling surface cooler 32 and a reheating surface cooler 33. The cooling liquid in the cooling liquid circulation system 3 flows through the cold source unit 31, the pre-cooling surface cooler 32, the second tube pass and the reheating surface cooler 33 in sequence, and returns to the cold source unit 31.

[0047] The air flow enters the pre-cooling surface cooler 32, the finned evaporator 23 and the reheating surface cooler 33 in sequence, and forms the supply air flow.

[0048] In the present application, the dehumidified air is heated by the heat of the cooling liquid circulation system 3. Compared with the prior art in which the air is dehumidified and heated by the refrigerant circulation system 2, the temperature and humidity can be independently controlled, and the precision of the temperature and humidity control of the supply air is effectively improved.

[0049] Specifically, the refrigerant is compressed and heated by the compressor 21, enters the first tube pass of the shell-and-tube condenser 1, is throttled by the throttling device 22 to become low-temperature refrigerant, flows through the finned evaporator 23 and returns to the compressor 21, so as to realize the circulation of the refrigerant. The low-temperature pre-cooling water provided by the cold source unit 31 enters the pre-cooling surface cooler 32, is heated, enters the second tube pass of the shell-and-tube condenser 1, is heated again after heat exchange with the high-temperature refrigerant in the first tube pass, then enters the reheating surface cooler 33 to heat the dehumidified air, returns the heat in the refrigerant circulation system 2 and the cooling liquid circulation system 3 to the air, and finally returns to the cold source unit 31 to realize the circulation of the cooling liquid. In the present application, the external fresh air first flows through the pre-cooling surface cooler 32 for pre-cooling, then flows through the finned evaporator 23 for dehumidification, the dehumidified air flows through the reheating surface cooler 33 for heating, and the indoor temperature is thus kept constant.

[0050] As shown in FIG. 1, Figure 6 In the related art, the heat exchange sequence of the fresh air and the heat exchanger is: pre-cooling surface cooler→evaporator→air-cooled condenser, and the fresh air is then sent to the indoor. The fresh air is first heat-exchanged with the pre-cooling surface cooler to be cooled, the pre-cooling surface cooler bears part of the sensible heat load, then the fresh air is further heat-exchanged with the evaporator to be cooled and dehumidified, at this time, the temperature of the fresh air is lower than the original temperature of the indoor, the fresh air needs to pass through the air-cooled condenser to be heated to a suitable temperature, and then the fresh air is sent to the indoor. The dehumidification and heating of the fresh air are both completed by the refrigerant system, and the upstream and downstream processes influence each other, the control precision is not high, and the complete independent control of the temperature and humidity of the fresh air cannot be effectively achieved.

[0051] In the embodiment of the present application, the gas after pre-cooling is dehumidified by the finned evaporator 23 of the refrigerant circulation system 2, and then the temperature of the dehumidified gas is raised by the reheating panel cooler 33 of the cooling liquid circulation system 3. The dehumidification and temperature rise of the gas are respectively completed by the mutually independent refrigerant circulation system 2 and the cooling liquid circulation system 3, so as to independently control the humidity and temperature of the gas, and effectively improve the precision of the temperature and humidity control of the supply air.

[0052] In some embodiments, the first regulating valve 34 is arranged between the second tube path and the reheating panel cooler 33, and is used to regulate the flow of the cooling liquid into the reheating panel cooler 33.

[0053] In the present application, the first regulating valve 34 is arranged to control the flow of the cooling liquid into the reheating panel cooler 33, so as to realize the temperature rise effect of the dehumidified gas, and the temperature of the gas can be more accurately controlled. Specifically, when the gas needs to be warmed up and the cooling liquid output by the second tube path can warm up the gas, the opening of the first regulating valve 34 can be increased to increase the flow of the cooling liquid into the reheating panel cooler 33, so as to warm up the gas. When the gas needs to be warmed up but the cooling liquid output by the second tube path cannot warm up the gas, the opening of the first regulating valve 34 can be reduced to reduce the flow of the cooling liquid into the reheating panel cooler 33. When the gas needs to be cooled down and the cooling liquid output by the second tube path can cool down the gas, the opening of the first regulating valve 34 can be increased to increase the flow of the cooling liquid into the reheating panel cooler 33. When the gas needs to be cooled down but the cooling liquid output by the second tube path cannot cool down the gas, the opening of the first regulating valve 34 can be reduced to reduce the flow of the cooling liquid into the reheating panel cooler 33.

[0054] As shown in FIG. 1, Figures 2-3 In some embodiments, the regulating branch 35 is arranged between the second tube path and the cooling source unit 31, and the regulating branch 35 is arranged in parallel with the reheating panel cooler 33. The second regulating valve 36 is arranged on the regulating branch 35, and is used to regulate the flow of the cooling liquid into the regulating branch 35.

[0055] In the present application, the regulating branch 35 is arranged to ensure the normal circulation of the cooling liquid. That is, when the flow of the cooling liquid in the reheating panel cooler 33 is increased, the flow of the cooling liquid flowing through the regulating branch 35 is correspondingly reduced. When the flow of the cooling liquid in the reheating panel cooler 33 is reduced, the flow of the cooling liquid flowing through the regulating branch 35 is correspondingly increased, so as to ensure the normal circulation of the cooling liquid, and further ensure the temperature of the cooling liquid at different positions, and further improve the temperature control effect on the gas.

[0056] Specifically, a one-way valve 37 is arranged between the reheating surface cooler 33 and the cold source unit 31, and the one-way valve 37 is arranged in parallel with the second regulating valve 36, so that the cooling liquid in the adjusting branch 35 can be prevented from entering the reheating surface cooler 33, and the flow of the cooling liquid flowing through the reheating surface cooler 33 can be accurately controlled, and the control accuracy of the gas temperature can be further improved.

[0057] In some embodiments, the first temperature sensor 4 is arranged to detect the temperature of the second tube pass output end, and the second temperature sensor 5 is arranged to detect the temperature of the reheating surface cooler 33 air input end; wherein the first temperature sensor 4 and the second temperature sensor 5 control the opening degree of the first regulating valve 34 and the second regulating valve 36 through the controller.

[0058] In the present application, the first temperature sensor 4 is arranged to detect the temperature of the second tube pass output end, i.e. the temperature of the cooling liquid output by the second tube pass, and the second temperature sensor 5 is arranged to detect the temperature before entering the reheating surface cooler 33. By comparing the temperature detected by the first temperature sensor 4 and the temperature detected by the second temperature sensor 5, it can be known whether the cooling liquid output by the second tube pass can heat or cool the gas. If it is needed to heat the gas and the cooling liquid output by the second tube pass can heat the gas, the opening degree of the first regulating valve 34 is increased and the opening degree of the second regulating valve 36 is decreased, so that more cooling liquid enters the reheating surface cooler 33 to heat the gas. If it is needed to heat the gas but the cooling liquid output by the second tube pass cannot heat the gas, the opening degree of the first regulating valve 34 is decreased and the opening degree of the second regulating valve 36 is increased, so that the cooling liquid is reduced or even avoided from entering the reheating surface cooler 33. If it is needed to cool the gas and the cooling liquid output by the second tube pass can cool the gas, the opening degree of the first regulating valve 34 is increased and the opening degree of the second regulating valve 36 is decreased, so that more cooling liquid enters the reheating surface cooler 33 to cool the gas. If it is needed to cool the gas but the cooling liquid output by the second tube pass cannot cool the gas, the opening degree of the first regulating valve 34 is decreased and the opening degree of the second regulating valve 36 is increased, so that the cooling liquid is reduced or even avoided from entering the reheating surface cooler 33.

[0059] Specifically, when the temperature detected by the first temperature sensor 4 is compared with the temperature detected by the second temperature sensor 5, the temperature detected by the second temperature sensor 5 needs to be increased by a deviation temperature. When the temperature detected by the first temperature sensor 4 is greater than the sum of the temperature detected by the second temperature sensor 5 and the deviation temperature, it proves that the cooling liquid output by the second tube pass has a heating effect on the gas. When the temperature detected by the first temperature sensor 4 is less than the sum of the temperature detected by the second temperature sensor 5 and the deviation temperature, it proves that the cooling liquid output by the second tube pass has a cooling effect on the gas.

[0060] In some embodiments, a third temperature sensor 6 is further included for detecting the temperature of the supply air flow, and the temperature detected by the third temperature sensor 6 is compared with the set temperature range of the supply air flow to obtain a temperature adjustment indication, and the controller adjusts the opening degree of the first adjustment valve 34 and the second adjustment valve 36 according to the temperature adjustment indication.

[0061] In the present application, the temperature of the supply air flow is detected by the third temperature sensor 6, and the temperature of the supply air flow is compared with the set temperature range of the supply air flow to obtain a temperature adjustment indication, i.e., when the temperature of the supply air flow is lower than the set temperature range of the supply air flow, the gas needs to be warmed up, and when the temperature of the supply air flow is higher than the set temperature range of the supply air flow, the gas needs to be cooled down. Then, according to the temperature adjustment indication, the opening degree of the first adjustment valve 34 and the second adjustment valve 36 is adjusted to regulate the flow of the cooling liquid into the reheating surface cooler 33, so as to realize the temperature rise or temperature drop of the gas, and the temperature adjustment of the supply air flow can be automatically completed according to the set temperature range of the supply air flow.

[0062] Specifically, when the temperature adjustment indication is to warm up, if the cooling liquid output by the second tube passage can warm up the gas, the flow of the cooling liquid into the reheating surface cooler 33 is increased, and if the cooling liquid output by the second tube passage cannot warm up the gas, the cooling liquid into the reheating surface cooler 33 is reduced or even avoided. When the temperature adjustment indication is to cool down, if the cooling liquid output by the second tube passage can cool down the gas, the flow of the cooling liquid into the reheating surface cooler 33 is increased, and if the cooling liquid output by the second tube passage cannot cool down the gas, the cooling liquid into the reheating surface cooler 33 is reduced or even avoided. When the temperature adjustment indication is to maintain the temperature, the flow of the cooling liquid into the reheating surface cooler 33 is kept unchanged.

[0063] In a specific embodiment, when the third temperature sensor 6 detects that the temperature is lower than the set temperature range of the supply air flow, and the temperature detected by the first temperature sensor 4 is higher than the temperature detected by the second temperature sensor 5, the opening degree of the first adjustment valve 34 is increased, and the opening degree of the second adjustment valve 36 is decreased; and / or when the third temperature sensor 6 detects that the temperature is lower than the set temperature range of the supply air flow, and the temperature detected by the first temperature sensor 4 is lower than the temperature detected by the second temperature sensor 5, the opening degree of the first adjustment valve 34 is decreased, and the opening degree of the second adjustment valve 36 is increased.

[0064] In the present application, when the temperature detected by the third temperature sensor 6 is lower than the set temperature range of the air supply flow, i.e. the air supply temperature is lower than the set temperature range, if the temperature detected by the first temperature sensor 4 is higher than the sum of the temperature detected by the second temperature sensor 5 and the deviation temperature, it proves that the cooling liquid output by the second tube pass can warm up the gas, then the opening degree of the first regulating valve 34 is increased and the opening degree of the second regulating valve 36 is decreased to increase the flow of the cooling liquid into the reheating surface cooler 33, thereby realizing the warming up of the gas; if the temperature detected by the first temperature sensor 4 is lower than the sum of the temperature detected by the second temperature sensor 5 and the deviation temperature, it proves that the cooling liquid output by the second tube pass can cool down the gas, then the opening degree of the first regulating valve 34 is decreased and the opening degree of the second regulating valve 36 is increased to decrease the flow of the cooling liquid into the reheating surface cooler 33.

[0065] Specifically, when the gas needs to be warmed up and the cooling liquid output by the second tube pass cools down the gas, the opening degree of the first regulating valve 34 can be gradually decreased or the first regulating valve 34 can be directly closed and the opening degree of the second regulating valve 36 is adjusted to the maximum.

[0066] In some embodiments, when the temperature detected by the third temperature sensor 6 is within the set temperature range of the air supply flow, the opening degrees of the first regulating valve 34 and the second regulating valve 36 remain unchanged.

[0067] In the present application, when the temperature detected by the third temperature sensor 6 is within the set temperature range of the air supply flow, i.e. the air supply temperature is within the set temperature range, if the gas does not need to be warmed up or cooled down, the opening degrees of the first regulating valve 34 and the second regulating valve 36 remain unchanged.

[0068] In some embodiments, when the temperature detected by the third temperature sensor 6 is higher than the set temperature range of the air supply flow and the temperature detected by the first temperature sensor 4 is higher than the temperature detected by the second temperature sensor 5, the opening degree of the first regulating valve 34 is decreased and the opening degree of the second regulating valve 36 is increased; and / or when the temperature detected by the third temperature sensor 6 is higher than the set temperature range of the air supply flow and the temperature detected by the first temperature sensor 4 is lower than the temperature detected by the second temperature sensor 5, the opening degree of the first regulating valve 34 is increased and the opening degree of the second regulating valve 36 is decreased.

[0069] In the present application, when the temperature detected by the third temperature sensor 6 is higher than the set temperature range of the air flow, i.e. the air temperature is higher than the set temperature range, the gas needs to be cooled down. If the temperature detected by the first temperature sensor 4 is lower than the sum of the temperature detected by the second temperature sensor 5 and the deviation temperature at this time, it proves that the cooling liquid output by the second tube passes can cool down the gas, then the opening of the first regulating valve 34 is increased, the opening of the second regulating valve 36 is decreased, and the flow of the cooling liquid into the reheating surface cooler 33 is increased; if the temperature detected by the first temperature sensor 4 is higher than the sum of the temperature detected by the second temperature sensor 5 and the deviation temperature at this time, it proves that the cooling liquid output by the second tube passes cannot cool down the gas, then the flow of the cooling liquid into the reheating surface cooler 33 is decreased.

[0070] Specifically, when the gas needs to be cooled down, and the cooling liquid output by the second tube passes warms up the gas, the opening of the first regulating valve 34 can be gradually decreased, or the first regulating valve 34 can be directly closed, and the opening of the second regulating valve 36 is adjusted to the maximum.

[0071] In some embodiments, the refrigerant circulation system 2 further comprises a heating branch 24 arranged between the compressor 21 and the throttling device 22, the heating branch 24 is arranged in parallel with the first tube pass, the heating branch 24 is provided with a reheating condenser 25 and a third regulating valve 26, the third regulating valve 26 is used to adjust the flow of the refrigerant flowing through the heating branch 24, and the opening of the third regulating valve 26 is controlled by the controller.

[0072] In the present application, part of the refrigerant heated by the compressor 21 enters the heating branch 24, and the reheating cooler can further warm up the gas, and the other part enters the first tube pass of the shell-and-tube condenser 1 to heat the cooling liquid of the second tube pass. Specifically, the reheating cooler is located at the output end of the reheating surface cooler 33, i.e. the gas first enters the reheating surface cooler 33, and then enters the reheating condenser 25. The flow of the refrigerant entering the heating branch 24 can be adjusted through the third regulating valve 26, so that the cooling liquid output by the second tube pass can be used to adjust the temperature of the gas, and the reheating condenser 25 can also be used to adjust the temperature of the gas.

[0073] Specifically, the case of cooling the air flow is relatively rare, and the flow of the refrigerant in the finned evaporator 23 or the flow of the cooling liquid in the precooling surface cooler 32 is generally increased to cool the air flow. It is more common to warm up the dehumidified gas, and the cooling liquid output by the second tube pass is used to warm up the gas in the reheating surface cooler 33 in the present application, so that the part of the gas that is warmed up is separated from the refrigerant circulation system 2, so that the temperature and humidity of the gas can be independently controlled, and the precision of the temperature and humidity control of the gas is improved.

[0074] In some embodiments, when the temperature detected by the third temperature sensor 6 is lower than the set temperature range of the air flow, the temperature detected by the first temperature sensor 4 is higher than the temperature detected by the second temperature sensor 5, and the opening of the first regulating valve 34 is maximum, the opening of the second regulating valve 36 is minimum, the opening of the third regulating valve 26 is controlled to increase; and / or when the temperature detected by the temperature sensor is lower than the set temperature range of the air flow, the temperature detected by the first temperature sensor 4 is lower than the temperature detected by the second temperature sensor 5, and the opening of the first regulating valve 34 is minimum, the opening of the second regulating valve 36 is maximum, the opening of the third regulating valve 26 is controlled to increase.

[0075] In the present application, when extreme cases occur, for example, the gas needs to be warmed up, the cooling liquid output by the second pipe passage can warm up the gas, but the opening of the first regulating valve 34 has been adjusted to the maximum, and the temperature of the air flow is still lower than the set temperature range of the air flow, at this time, the flow of the refrigerant in the reheat condenser 25 can be increased to further increase the temperature of the air flow to the set temperature range; for example, the gas needs to be warmed up, but the cooling liquid output by the second pipe passage is not enough to warm up the gas, the first regulating valve 34 is closed, and the temperature of the air flow is still lower than the set temperature range, at this time, the flow of the refrigerant in the reheat condenser 25 can be increased to further increase the temperature of the air flow to the set temperature range.

[0076] In some embodiments, when the temperature detected by the third temperature sensor 6 is within the set temperature range of the air flow, the openings of the first regulating valve 34, the second regulating valve 36 and the third regulating valve 26 are kept unchanged.

[0077] In the present application, when the temperature of the air flow is within the set temperature range of the air flow, the openings of the first regulating valve 34, the second regulating valve 36 and the third regulating valve 26 are kept unchanged.

[0078] Specifically, the above-mentioned case that the openings of the first regulating valve 34, the second regulating valve 36 and the third regulating valve 26 are kept unchanged is when the cooling liquid is not enough to adjust the temperature of the gas. If the cooling liquid can complete the adjustment of the temperature of the gas, the third regulating valve 26 is kept closed, at this time, the temperature adjustment of the gas is completed by the cooling liquid, the dehumidification of the gas is completed by the refrigerant circulation system 2, and the temperature and humidity control of the gas are ensured to be independent of each other.

[0079] In some embodiments, when the temperature detected by the third temperature sensor 6 is higher than the set temperature range of the air supply flow, the temperature detected by the first temperature sensor 4 is higher than the temperature detected by the second temperature sensor 5, and the opening degree of the first regulating valve 34 is minimum and the opening degree of the second regulating valve 36 is maximum, the opening degree of the third regulating valve 26 is controlled to decrease; and / or when the temperature detected by the third temperature sensor 6 is higher than the set temperature range of the air supply flow, the temperature detected by the first temperature sensor 4 is lower than the temperature detected by the second temperature sensor 5, and the opening degree of the first regulating valve 34 is maximum and the opening degree of the second regulating valve 36 is minimum, the opening degree of the third regulating valve 26 is controlled to decrease.

[0080] In the present application, when extreme cases occur, for example, when the gas needs to be cooled, the cooling liquid output by the second tube passes can cool the gas, but the opening degree of the first regulating valve 34 has been adjusted to maximum, and the air supply temperature is still higher than the set temperature range, at this time, the opening degree of the third regulating valve 26 can be decreased or even the third regulating valve 26 is closed. For another example, when the gas needs to be cooled, the cooling liquid output by the second tube passes is not enough to cool the gas, and the opening degree of the first regulating valve 34 has been adjusted to minimum, at this time, the opening degree of the third regulating valve 26 can be decreased or even the third regulating valve 26 is closed.

[0081] In some embodiments, the air conditioner further comprises a humidity sensor 7, the humidity sensor 7 is used to detect the humidity of the air output end of the fin evaporator 23; wherein when the humidity detected by the humidity sensor 7 is greater than the set humidity range, the power of the compressor 21 is controlled to increase; when the humidity detected by the humidity sensor 7 is less than the set humidity range, the power of the compressor 21 is controlled to decrease; when the humidity detected by the humidity sensor 7 is within the set humidity range, the power of the compressor 21 is controlled to be unchanged.

[0082] In the present application, when the humidity of the gas is lower than the preset humidity range, the power of the compressor 21 is increased, the supply of the refrigerant is increased, and the dehumidification effect on the gas is improved; when the humidity of the gas is higher than the preset humidity range, the power of the compressor 21 is decreased, and the supply of the refrigerant is reduced; when the humidity of the gas is within the preset humidity range, the power of the compressor 21 is kept unchanged.

[0083] Specifically, when the gas needs to be cooled, the power of the compressor 21 can also be increased to complete the cooling.

[0084] The air conditioner provided by the embodiments of the present application further comprises a fan 8, the fan 8 is used to supply air indoors, and drive external air to pass through the pre-cooling surface cooler 32, the fin evaporator 23, the reheating surface cooler 33 and the reheating condenser 25 in sequence to form an air supply flow and enter the room.

[0085] The air conditioning device warms the dehumidified gas through the heat of the cooling liquid circulation system 3, compared with the existing technology of dehumidifying and warming the gas through the refrigerant circulation system 2, the temperature and humidity can be independently controlled, and the precision of the temperature and humidity control of the supply air is effectively improved.

[0086] As shown in Figure 4 The control method of the air conditioning device provided by the embodiment of the present application includes the following steps:

[0087] S1, pre-cooling the incoming air through the pre-cooling fin cooler 32 of the air conditioning device;

[0088] S2, dehumidifying the air pre-cooled by the pre-cooling fin cooler 32 through the fin evaporator 23 of the air conditioning device;

[0089] S3, warming the air dehumidified by the fin evaporator 23 through the reheating fin cooler 33 of the air conditioning device.

[0090] In the present application, the incoming air is pre-cooled through the pre-cooling fin cooler 32, then the pre-cooled gas is dehumidified through the fin evaporator 23 in the refrigerant circulation system 2, and then the dehumidified gas is warmed through the reheating fin cooler 33 in the cooling liquid circulation system 3, so that the dehumidification and warming of the gas are independent of each other, and the temperature and humidity of the supply air are more convenient to adjust, and the control precision of the temperature and humidity of the supply air is improved.

[0091] In some embodiments, the cooling liquid circulation system 3 of the air conditioning device includes a first adjusting valve 34 arranged between the second tube pass of the shell and tube condenser 1 and the reheating fin cooler 33, the first adjusting valve 34 is used to adjust the flow of the cooling liquid into the reheating fin cooler 33; the warming of the air dehumidified by the fin evaporator 23 through the reheating fin cooler 33 of the air conditioning device includes:

[0092] S31, adjusting the opening of the first adjusting valve 34, and then adjusting the flow of the cooling liquid into the reheating fin cooler 33.

[0093] In the present application, by adjusting the flow of the cooling liquid into the reheating fin cooler 33, the temperature adjustment of the gas by the cooling liquid is adjusted, so that the cooling liquid can more accurately adjust the temperature of the gas.

[0094] In some embodiments, an adjusting branch 35 is arranged between the second tube pass and the cooling source unit 31 of the cooling liquid circulation system 3, the adjusting branch 35 is arranged in parallel with the reheating fin cooler 33, a second adjusting valve 36 is arranged on the adjusting branch 35, the second adjusting valve 36 is used to adjust the flow of the cooling liquid into the adjusting branch 35, and the warming of the air dehumidified by the fin evaporator 23 through the reheating fin cooler 33 of the air conditioning device further includes:

[0095] S32, adjusting the opening degree of the first regulating valve 34 and the second regulating valve 36, thereby adjusting the flow of the cooling liquid into the reheating cooler 33.

[0096] In the present application, by cooperatively adjusting the first regulating valve 34 and the second regulating valve 36, the normal circulation of the cooling liquid in the cooling liquid circulation system 3 is ensured, thereby ensuring that the temperature of the cooling liquid remains unchanged during the circulation process. Only the flow of the cooling liquid needs to be adjusted, which can realize the adjustment of the gas temperature, and it is more convenient to adjust the cooling effect in the reheating cooler 33.

[0097] As shown in FIG. 1, in some embodiments, the control method further comprises: Figure 5

[0098] S4, obtaining the temperature T1 of the supply air flow and comparing T1 with the set temperature range T2 of the supply air flow;

[0099] S5, obtaining the temperature T3 of the second tube passage output end and the temperature T4 of the air input end of the reheating cooler 33;

[0100] Adjusting the opening degree of the first regulating valve 34 and the second regulating valve 36 comprises at least one of the following:

[0101] S321, if T1 is less than T2 and T3 is greater than T4, the opening degree of the first regulating valve 34 is increased by △P1, and the opening degree of the second regulating valve 36 is decreased by △P1;

[0102] S322, if T1 is less than T2 and T3 is less than T4, the opening degree of the first regulating valve 34 is decreased by △P1, and the opening degree of the second regulating valve 36 is increased by △P1;

[0103] S323, if T1 is within T2, the opening degree of the first regulating valve 34 and the second regulating valve 36 is kept unchanged;

[0104] S324, if T1 is greater than T2 and T3 is greater than T4, the first regulating valve 34 is closed, and the opening degree of the second regulating valve 36 is adjusted to the maximum;

[0105] S325, if T1 is greater than T2 and T3 is less than T4, the opening degree of the first regulating valve 34 is increased by △P1, and the opening degree of the second regulating valve 36 is decreased by △P1.

[0106] In the present application, the temperature T1 of the supply air flow is detected by the third temperature sensor 6, the temperature T3 of the second tube passage output end is detected by the first temperature sensor 4, and the temperature T4 of the air input end of the reheating cooler 33 is detected by the second temperature sensor 5.

[0107] ​Specifically, according to different operating conditions of the air conditioning device, the opening degrees of the first regulating valve 34 and the second regulating valve 36 are adjusted to realize the regulation of the temperature of the supply air flow, and the temperature regulation and the humidity regulation of the supply air flow are independent of each other, thereby ensuring the control accuracy of the humidity and the temperature of the supply air flow.

[0108] In some embodiments, the refrigerant circulation system 2 comprises the cold source unit 31, the pre-cooling surface cooler 32, the reheating surface cooler 33, and the temperature-increasing branch 24, the temperature-increasing branch 24 is arranged in parallel with the first tube pass of the shell-and-tube condenser 1, the reheating condenser 25 and the third regulating valve 26 are arranged on the temperature-increasing branch 24, and the third regulating valve 26 is used to regulate the refrigerant flow through the temperature-increasing branch 24; the control method further comprises at least one of the following:

[0109] S6, if T1 is less than T2, T3 is greater than T4, and the opening degree of the first regulating valve 34 is maximum and the opening degree of the second regulating valve 36 is minimum, then the opening degree of the third regulating valve 26 is increased by △P2;

[0110] S7, if T1 is less than T2, T3 is less than T4, and the opening degree of the first regulating valve 34 is minimum and the opening degree of the second regulating valve 36 is maximum, then the opening degree of the third regulating valve 26 is increased by △P2;

[0111] S8, if T1 is greater than T2, T3 is greater than T4, and the opening degree of the first regulating valve 34 is minimum and the opening degree of the second regulating valve 36 is maximum, then the opening degree of the third regulating valve 26 is decreased by △P2;

[0112] S9, if T1 is greater than T2, T3 is less than T4, and the opening degree of the first regulating valve 34 is maximum and the opening degree of the second regulating valve 36 is minimum, then the opening degree of the third regulating valve 26 is decreased by △P2;

[0113] S10, if T1 is within T2, then the opening degrees of the first regulating valve 34, the second regulating valve 36, and the third regulating valve 26 are kept unchanged.

[0114] In the present application, when some extreme conditions are encountered and the cooling liquid alone cannot complete the regulation of the temperature of the gas, the reheating condenser 25 can be used for assistance to regulate the temperature of the gas to a set temperature range, which can effectively cope with extreme conditions and ensure the accuracy of the supply air temperature and humidity.

[0115] In some embodiments, the control method further comprises supply air humidity control, and the supply air humidity control comprises at least one of the following:

[0116] S11, if the humidity W1 of the supply air flow is greater than the set humidity range W2 of the supply air flow, then the power of the compressor 21 of the air conditioning device is increased by ΔF;

[0117] S12, if W1 is less than W2, then the power of the compressor 21 is decreased by ΔF;

[0118] S13, if W1 is within W2, keeping the power of the compressor 21 unchanged.

[0119] In this application, the humidity adjustment of the supply air flow mainly relies on the compressor 21. When the humidity W1 of the supply air flow is greater than the set humidity range W2 of the supply air flow, the power of the compressor 21 is increased; when the humidity W1 of the supply air flow is less than the set humidity range W2 of the supply air flow, the power of the compressor 21 is decreased; and when the humidity W1 of the supply air flow is within the set humidity range W2 of the supply air flow, the power of the compressor 21 is kept unchanged.

[0120] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0121] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to differentiate one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0122] The above summary of the only specific embodiments of the application enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air conditioning apparatus characterized by comprising: The shell-and-tube condenser has a first tube pass and a second tube pass. The refrigerant circulating system is in communication with the first tube pass and includes a compressor, a throttling device, and a finned evaporator. Refrigerant in the refrigerant circulating system flows through the compressor, the first tube pass, the throttling device, and the finned evaporator in sequence, and returns to the compressor. The cooling liquid circulating system is in communication with the second tube pass and includes a cold source unit, a pre-cooling surface cooler, and a reheating surface cooler. Cooling liquid in the cooling liquid circulating system flows through the cold source unit, the pre-cooling surface cooler, the second tube pass, and the reheating surface cooler in sequence, and returns to the cold source unit. The first regulating valve is arranged between the second tube pass and the reheating surface cooler and is used to regulate the flow of cooling liquid into the reheating surface cooler. The regulating branch is arranged in parallel with the reheating surface cooler and has the second regulating valve arranged thereon, which is used to regulate the flow of cooling liquid into the regulating branch. The first temperature sensor is used to detect the temperature at the output end of the second tube pass, and the second temperature sensor is used to detect the temperature at the air input end of the reheating surface cooler.

2. The air conditioning apparatus according to claim 1, wherein The first temperature sensor and the second temperature sensor control the opening degrees of the first regulating valve and the second regulating valve through the controller.

3. The air conditioning apparatus according to claim 2, wherein The third temperature sensor is used to detect the temperature of the supply air flow. The temperature detected by the third temperature sensor is compared with the set temperature range of the supply air flow to obtain a temperature regulation indication. The controller adjusts the opening degrees of the first regulating valve and the second regulating valve according to the temperature regulation indication.

4. The air conditioning apparatus according to claim 3, wherein When the temperature detected by the third temperature sensor is lower than the set temperature range of the supply air flow, and the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor, the opening degree of the first regulating valve is increased, and the opening degree of the second regulating valve is decreased; and / or When the temperature detected by the third temperature sensor is lower than the set temperature range of the supply air flow, and the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, the opening degree of the first regulating valve is decreased, and the opening degree of the second regulating valve is increased.

5. The air conditioning apparatus according to claim 4, wherein When the temperature detected by the third temperature sensor is within the set temperature range of the supply air flow, the opening degrees of the first regulating valve and the second regulating valve remain unchanged.

6. The air conditioning apparatus according to claim 5, wherein When the temperature detected by the third temperature sensor is higher than the set temperature range of the supply air flow, and the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor, the opening degree of the first regulating valve is decreased, and the opening degree of the second regulating valve is increased; and / or ​ 7. The air conditioning apparatus according to claim 5, wherein ​ 8. The air conditioning apparatus according to claim 5, wherein ​ When the temperature detected by the third temperature sensor is higher than the set temperature range of the air supply flow, and the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, the opening of the first regulating valve is controlled to increase, and the opening of the second regulating valve is controlled to decrease.

9. The air conditioning apparatus according to any one of claims 5 to 8, wherein The refrigerant circulation system further comprises a temperature-increasing branch provided between the compressor and the throttling device, the temperature-increasing branch is provided in parallel with the first tube, a reheating condenser and a third regulating valve are provided on the temperature-increasing branch, the third regulating valve is used to regulate the flow of refrigerant through the temperature-increasing branch, and the controller controls the opening of the third regulating valve.

10. The air conditioning apparatus according to claim 9, wherein When the temperature detected by the third temperature sensor is lower than the set temperature range of the air supply flow, the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor, and the opening of the first regulating valve is maximum and the opening of the second regulating valve is minimum, the opening of the third regulating valve is controlled to increase; and / or When the temperature detected by the third temperature sensor is lower than the set temperature range of the air supply flow, the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, and the opening of the first regulating valve is minimum and the opening of the second regulating valve is maximum, the opening of the third regulating valve is controlled to increase.

11. The air conditioning apparatus according to claim 9, wherein When the temperature detected by the third temperature sensor is within the set temperature range of the air supply flow, the openings of the first regulating valve, the second regulating valve and the third regulating valve are kept unchanged.

12. The air conditioning apparatus according to claim 9, wherein When the temperature detected by the third temperature sensor is higher than the set temperature range of the air supply flow, the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor, and the opening of the first regulating valve is minimum and the opening of the second regulating valve is maximum, the opening of the third regulating valve is controlled to decrease; and / or When the temperature detected by the third temperature sensor is higher than the set temperature range of the air supply flow, the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, and the opening of the first regulating valve is maximum and the opening of the second regulating valve is minimum, the opening of the third regulating valve is controlled to decrease. Further comprising a humidity sensor for detecting the humidity of the air output end of the fin evaporator; 13. The air conditioning apparatus according to claim 1, wherein When the humidity detected by the humidity sensor is greater than the set humidity range, the power of the compressor is controlled to increase; when the humidity detected by the humidity sensor is less than the set humidity range, the power of the compressor is controlled to decrease; and when the humidity detected by the humidity sensor is within the set humidity range, the power of the compressor is kept unchanged. The method comprises the following steps:

14. A control method for the air conditioning apparatus according to any one of claims 1 to 13, characterized by, Pre-cooling the incoming air by a pre-cooling surface cooler of the air conditioning device; Dehumidifying the air pre-cooled by the pre-cooling surface cooler by a fin evaporator of the air conditioning device; Reheating the air dehumidified by the fin evaporator by a reheating surface cooler of the air conditioning device. ​ 15. The control method according to claim 14, wherein The cooling liquid circulation system of the air conditioning device comprises a first regulating valve arranged between the second tube pass of the shell-and-tube condenser and the reheating fin cooler, and the first regulating valve is used for regulating the flow of the cooling liquid into the reheating fin cooler. The temperature of the air dehumidified by the fin evaporator is raised by the reheating fin cooler of the air conditioning device, and the reheating fin cooler comprises: The opening of the first regulating valve is adjusted, and then the flow of the cooling liquid into the reheating fin cooler is adjusted.

16. The control method according to claim 15, wherein The second tube pass and the cooling source unit of the cooling liquid circulation system are provided with a regulating branch, the regulating branch is arranged in parallel with the reheating fin cooler, the regulating branch is provided with a second regulating valve, the second regulating valve is used for regulating the flow of the cooling liquid into the regulating branch, and the temperature of the air dehumidified by the fin evaporator is raised by the reheating fin cooler of the air conditioning device, and the reheating fin cooler further comprises: The opening of the first regulating valve and the second regulating valve is adjusted, and then the flow of the cooling liquid into the reheating fin cooler is adjusted.

17. The control method according to claim 16, wherein The control method further comprises: The temperature T1 of the supply air flow is obtained, and T1 is compared with a set temperature range T2 of the supply air flow; The temperature T3 of the output end of the second tube pass and the temperature T4 of the air input end of the reheating fin cooler are obtained; The adjustment of the opening of the first regulating valve and the second regulating valve comprises at least one of the following: If T1 is less than T2, and T3 is greater than T4, the opening of the first regulating valve is increased by △P1, and the opening of the second regulating valve is decreased by △P1; If T1 is less than T2, and T3 is less than T4, the opening of the first regulating valve is decreased by △P1, and the opening of the second regulating valve is increased by △P1; If T1 is within T2, the opening of the first regulating valve and the second regulating valve is kept unchanged; If T1 is greater than T2, and T3 is greater than T4, the first regulating valve is closed, and the opening of the second regulating valve is adjusted to the maximum; If T1 is greater than T2, and T3 is less than T4, the opening of the first regulating valve is increased by △P1, and the opening of the second regulating valve is decreased by △P1.

18. The control method according to claim 17, wherein The refrigerant circulation system comprises a cooling source unit, a pre-cooling fin cooler, a reheating fin cooler and a temperature raising branch, the temperature raising branch is arranged in parallel with the first tube pass of the shell-and-tube condenser, the temperature raising branch is provided with a reheating condenser and a third regulating valve, the third regulating valve is used for regulating the flow of the refrigerant flowing through the temperature raising branch, and the control method further comprises at least one of the following: If T1 is less than T2, T3 is greater than T4, and the opening of the first regulating valve is the maximum and the opening of the second regulating valve is the minimum, the opening of the third regulating valve is increased by △P2; If T1 is less than T2, T3 is less than T4, and the opening of the first regulating valve is the minimum and the opening of the second regulating valve is the maximum, the opening of the third regulating valve is increased by △P2; If T1 is greater than T2, T3 is greater than T4, and the opening of the first regulating valve is the minimum and the opening of the second regulating valve is the maximum, the opening of the third regulating valve is decreased by △P2; if T1 is greater than T2, T3 is less than T4, and the opening of the first regulating valve is maximum and the opening of the second regulating valve is minimum, the opening of the third regulating valve is reduced by △P2; if T1 is within T2, the opening of the first regulating valve, the second regulating valve and the third regulating valve is kept unchanged.

19. The control method of claim 14, wherein The control method further comprises a supply air humidity control, the supply air humidity control comprising at least one of: if the humidity W1 of the supply air flow is greater than the set humidity range W2 of the supply air flow, the compressor power of the air conditioning device is increased by ΔF; if W1 is less than W2, the compressor power is reduced by ΔF; if W1 is within W2, the power of the compressor is kept unchanged.

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