Air conditioning device and control method thereof

Abstract

The invention relates to the technical field of air conditioners, in particular to an air conditioning device and a control method thereof.The air conditioning device comprises a shell and tube condenser, a refrigerant circulation system and a cooling liquid circulation system, and the shell and tube condenser is provided with 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, and a refrigerant in the refrigerant circulation system sequentially flows through the compressor, the first tube pass, the throttling device and the fin evaporator and returns to the compressor; and the cooling liquid circulation system is communicated with the second tube pass and comprises a cold source unit, a pre-cooling surface air cooler and a reheating surface air cooler, air inlet airflow sequentially flows through the pre-cooling surface air cooler, the fin evaporator and the reheating surface air cooler to form air supply airflow, and the air conditioning device can achieve independent control over the temperature and the humidity, so that the air conditioning efficiency is improved. And the precision of air supply temperature and humidity control is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning device and a control method thereof. Background Art

[0002] At present, in the fresh air dehumidifier, the order of heat exchange between fresh air and heat exchanger is: pre-cooling surface cooler → evaporator → air-cooled condenser, and then sent to the room. The fresh air first exchanges heat with the pre-cooling surface cooler to cool down, and the pre-cooling surface cooler bears part of the sensible heat load, and then further exchanges heat with the evaporator to cool down, and dehumidification is completed. At this time, the temperature of the fresh air is lower than the original temperature of the room. In order to keep the indoor temperature constant, the fresh air needs to pass through the air-cooled condenser, rise to a suitable temperature, and then be sent to the room. In this process, the air-cooled condenser is used for reheat recovery and heating. The upstream and downstream processes affect each other, and the control accuracy is not high, and it is impossible to effectively achieve completely independent control of temperature and humidity. Summary of the invention

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

[0004] To this end, an embodiment of the present application provides an air-conditioning device, including: a shell and tube condenser having a first tube pass and a second tube pass; a refrigerant circulation system connected to the first tube pass, the refrigerant circulation system including 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; and a coolant circulation system connected to the second tube pass, the coolant circulation system including a cold source unit, a pre-cooling surface cooler and a reheating surface cooler, the coolant in the coolant circulation 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; wherein the intake air flow flows through the pre-cooling surface cooler, the fin evaporator and the reheating surface cooler in sequence, and forms a supply air flow.

[0005] In a possible implementation, a first regulating valve is provided between the second pipe pass and the reheat surface cooler, and the first regulating valve is used to regulate the flow of coolant entering the reheat surface cooler.

[0006] In a possible implementation, a regulating branch is provided between the second pipe pass and the cold source unit, the regulating branch is provided in parallel with the reheat surface cooler, a second regulating valve is provided on the regulating branch, and the second regulating valve is used to regulate the coolant flow entering the regulating branch.

[0007] In a possible implementation, it also includes a first temperature sensor and a second temperature sensor, the first temperature sensor is used to detect the temperature of the second pipe output end, and the second temperature sensor is used to detect the temperature of the reheat cooler air input end; wherein the first temperature sensor and the second temperature sensor control the opening of the first regulating valve and the second regulating valve through the controller.

[0008] In a possible implementation, a third temperature sensor is further included, and 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 adjustment indication, and the controller adjusts the opening of the first regulating valve and the second regulating valve according to the temperature adjustment indication.

[0009] In one possible implementation, 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 of the first regulating valve is controlled to increase, and the opening of the second regulating valve is controlled to decrease; 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 of the first regulating valve is controlled to decrease, and the opening of the second regulating valve is controlled to increase.

[0010] In a possible implementation, when the temperature detected by the third temperature sensor is within a set temperature range of the supply air flow, the openings of the first regulating valve and the second regulating valve are kept unchanged.

[0011] In one possible implementation, 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 of the first regulating valve is controlled to decrease, and the opening of the second regulating valve is controlled to increase; and / or 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 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.

[0012] In one possible implementation, the refrigerant circulation system also includes a temperature-increasing branch arranged between the compressor and the throttling device, the temperature-increasing branch is arranged in parallel with the first pipe pass, and a reheat condenser and a third regulating valve are arranged on the temperature-increasing branch. The third regulating valve is used to adjust the refrigerant flow rate flowing through the temperature-increasing branch, and the controller controls the opening of the third regulating valve.

[0013] In one possible implementation, when the temperature detected by the third temperature sensor is lower than the set temperature range of the supply air 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 at a maximum and the opening of the second regulating valve is at a minimum, the opening 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 supply air 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 at a minimum and the opening of the second regulating valve is at a maximum, the opening 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 a set temperature range of the supply air flow, the openings of the first regulating valve, the second regulating valve, and the third regulating valve are kept unchanged.

[0015] In one possible implementation, when the temperature detected by the third temperature sensor is higher than the set temperature range of the supply air 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 at a minimum, and the opening of the second regulating valve is at a 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 supply air 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 at a maximum, and the opening of the second regulating valve is at a minimum, the opening of the third regulating valve is controlled to decrease.

[0016] In a possible implementation, a humidity sensor is also included, which is used to detect the humidity at the air output end of the fin evaporator; when the humidity detected by the humidity sensor is greater than a set humidity range, the compressor power is controlled to increase; when the humidity detected by the humidity sensor is less than the set humidity range, the compressor power is controlled to decrease; when the humidity detected by the humidity sensor is within the set humidity range, the compressor power is controlled to remain unchanged.

[0017] In the second aspect, an embodiment of the present application provides a control method for the above-mentioned air-conditioning device, comprising the following steps: precooling the incoming air by a precooling surface cooler of the air-conditioning device; dehumidifying the air precooled by the precooling surface cooler by a fin evaporator of the air-conditioning device; and heating the air dehumidified by the fin evaporator by a reheat surface cooler of the air-conditioning device.

[0018] In one possible implementation, the coolant circulation system of the air-conditioning device includes a first regulating valve arranged between the second tube pass of the shell and tube condenser and the reheat cooler, and the first regulating valve is used to adjust the coolant flow entering the reheat cooler; heating the air dehumidified by the fin evaporator through the reheat cooler of the air-conditioning device includes: adjusting the opening of the first regulating valve, and then adjusting the coolant flow entering the reheat cooler.

[0019] In one possible implementation, a regulating branch is arranged between the second pipe pass and the cold source unit of the coolant circulation system, the regulating branch is arranged in parallel with the reheat cooler, a second regulating valve is arranged on the regulating branch, and the second regulating valve is used to adjust the coolant flow entering the regulating branch. Heating the air dehumidified by the fin evaporator through the reheat cooler of the air-conditioning device also includes: adjusting the opening of the first regulating valve and the second regulating valve, thereby adjusting the coolant flow entering the reheat cooler.

[0020] In a possible implementation, the control method further includes: obtaining the temperature T1 of the supply air flow, and comparing T1 with the set temperature range T2 of the supply air flow; obtaining the temperature T3 of the output end of the second pipe pass and the temperature T4 of the air input end of the reheat cooler; adjusting the opening of the first regulating valve and the second regulating valve includes 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 increases by △P1, and the opening of the second regulating valve decreases by △P1; if T1 is less than T2, and T3 is less than T4, the opening of the first regulating valve decreases by △P1, and the opening of the second regulating valve increases 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 increases by △P1, and the opening of the second regulating valve decreases by △P1.

[0021] In a possible implementation, the refrigerant circulation system includes a cold source unit, a pre-cooling surface cooler, a reheating surface cooler and a heating branch, the heating branch is arranged in parallel with the first tube pass of the shell and tube condenser, and the heating branch is provided with a reheating condenser and a third regulating valve, and the third regulating valve is used to adjust the refrigerant flow through the heating branch; the control method also includes 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 largest and the opening of the second regulating valve is the smallest, then the opening of the third regulating valve increases by △P2; if T1 is less than T2, T3 is less than T4, and the opening of the first regulating valve is the largest and the opening of the second regulating valve is the smallest, then the opening of the third regulating valve increases by △P2; if T1 is less than T2, T3 is less than T4, If T1 is greater than T2, T3 is greater than T4, and the opening of the first regulating valve is the smallest and the opening of the second regulating valve is the largest, the opening of the third regulating valve increases by △P2; if T1 is greater than T2, T3 is less than T4, and the opening of the first regulating valve is the largest and the opening of the second regulating valve is the smallest, the opening of the third regulating valve decreases by △P2; if T1 is greater than T2, T3 is less than T4, and the opening of the first regulating valve is the largest and the opening of the second regulating valve is the smallest, the opening of the third regulating valve decreases by △P2; if T1 is within T2, the openings of the first regulating valve, the second regulating valve and the third regulating valve are kept unchanged.

[0022] In one possible implementation, the control method also includes supply air humidity control, and the supply air humidity control includes at least one of the following: 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 compressor power is kept unchanged.

[0023] According to the air-conditioning device and control method thereof provided in the embodiment of the present application, the air-conditioning device heats the dehumidified gas through the heat of the coolant circulation system. Compared with the prior art of dehumidifying and heating the gas through the refrigerant circulation system, independent control of temperature and humidity can be achieved, effectively improving the accuracy of supply air temperature and humidity control. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

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

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

[0029] Figure 3 Show Figure 1 The partial enlarged structural schematic diagram of the air conditioning device at position A is shown;

[0030] Figure 4 A flowchart of a method for controlling an air conditioner provided in an embodiment of the present application is shown;

[0031] Figure 5 A flowchart showing another air conditioning device control method provided by an embodiment of the present application is shown;

[0032] Figure 6The schematic diagram of the principle of the air conditioning device in the prior art is shown.

[0033] Description of reference numerals:

[0034] 1. Shell and tube condenser;

[0035] 2. Refrigerant circulation system; 21. Compressor; 22. Throttling device; 23. Finned evaporator; 24. Heating branch; 25. Reheat condenser; 26. Third regulating valve;

[0036] 3. Coolant circulation system; 31. Cold source unit; 32. Precooling surface cooler; 33. Reheating surface cooler; 34. First regulating valve; 35. Regulating branch; 36. Second regulating valve; 37. Check 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 purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0039] The disclosure below provides many different embodiments or examples to realize the different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present application. In addition, the embodiments of the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0040] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. 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 figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

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

[0042] Figure 1 A schematic diagram showing the principle of an air conditioning device provided in an embodiment of the present application is shown; Figure 2 A schematic diagram showing the principle of another air conditioning device provided in an embodiment of the present application is shown; Figure 3 Show Figure 1 The partial enlarged structural schematic diagram of the air conditioning device at position A is shown; Figure 4 A flowchart of a method for controlling an air conditioner provided in an embodiment of the present application is shown; Figure 5 A flowchart of another air conditioning device control method provided in an embodiment of the present application is shown.

[0043] like Figure 1-5 As shown, an embodiment of the present application provides an air-conditioning device, including: a shell and tube condenser 1, a refrigerant circulation system 2 and a coolant 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 is connected to the first pipe pass, and the refrigerant circulation system 2 includes a compressor 21, a throttling device 22 and a fin evaporator 23. The refrigerant in the refrigerant circulation system 2 flows through the compressor 21, the first pipe pass, the throttling device 22 and the fin evaporator 23 in sequence, and returns to the compressor 21.

[0046] The coolant circulation system 3 is connected to the second pipe pass, and the coolant circulation system 3 includes a cold source unit 31, a pre-cooling surface cooler 32 and a reheating surface cooler 33. The coolant in the coolant circulation system 3 flows through the cold source unit 31, the pre-cooling surface cooler 32, the second pipe pass and the reheating surface cooler 33 in sequence, and returns to the cold source unit 31.

[0047] The inlet air flow flows through the pre-cooling surface cooler 32, the fin evaporator 23 and the reheating surface cooler 33 in sequence to form a supply air flow.

[0048] In the present application, the dehumidified gas is heated by the heat of the coolant circulation system 3. Compared with the prior art in which the gas is dehumidified and heated by the refrigerant circulation system 2, independent control of temperature and humidity can be achieved, effectively improving the accuracy of supply air temperature and humidity control.

[0049] Specifically, the refrigerant is compressed and heated by the compressor 21 and enters the first tube pass of the shell and tube condenser 1, and then becomes a low-temperature refrigerant after being throttled by the throttling device 22. The low-temperature refrigerant flows through the fin evaporator 23 and returns to the compressor 21 to realize the circulation of the refrigerant. The cold source unit 31 provides low-temperature pre-cooling water to enter the pre-cooling surface cooler 32 for heating, and then enters the second tube pass of the shell and tube condenser 1. After heat exchange with the high-temperature refrigerant in the first tube pass, it is heated again, and then enters the reheating surface cooler 33 to heat the dehumidified air, and the heat in the refrigerant circulation system 2 and the coolant circulation system 3 is returned to the air, and finally returns to the cold source unit 31 to realize the circulation of the coolant. The external fresh air in this application first flows through the pre-cooling surface cooler 32 for pre-cooling, and then flows through the fin evaporator 23 for dehumidification. The dehumidified gas flows through the reheating surface cooler 33 to heat up, thereby keeping the indoor temperature constant.

[0050] like Figure 6 As shown, in the related technology, the heat exchange sequence between fresh air and the heat exchanger is: pre-cooling surface cooler → evaporator → air-cooled condenser, and then sent to the room. The fresh air first exchanges heat with the pre-cooling surface cooler to cool down. The pre-cooling surface cooler bears part of the sensible heat load, and then further exchanges heat with the evaporator to cool down to complete the dehumidification. At this time, the fresh air temperature is lower than the original indoor temperature. In order to keep the indoor temperature constant, the fresh air needs to pass through the air-cooled condenser, rise to a suitable temperature, and then be sent to the room. The dehumidification and heating of the fresh air are both completed by the refrigerant system. The upstream and downstream processes affect each other, and the control accuracy is not high. It is impossible to effectively achieve completely independent control of the fresh air temperature and humidity.

[0051] In the embodiment of the present application, the pre-cooled gas is dehumidified by the fin evaporator 23 of the refrigerant circulation system 2, and then the dehumidified gas is heated by the reheat condenser 33 of the coolant circulation system 3. The dehumidification and heating of the gas are respectively completed by the mutually independent refrigerant circulation system 2 and the coolant circulation system 3, thereby achieving independent control of the humidity and temperature of the gas, and effectively improving the accuracy of the control of the supply air temperature and humidity.

[0052] In some embodiments, a first regulating valve 34 is disposed between the second pipe pass and the reheat cooler 33 , and the first regulating valve 34 is used to regulate the flow of coolant entering the reheat cooler 33 .

[0053] In the present application, the first regulating valve 34 is set to control the flow of coolant entering the reheat cooler 33, thereby achieving the heating effect of the dehumidified gas, and the temperature of the gas can be controlled more accurately. Specifically, when the gas needs to be heated up, and the coolant output by the second pipe pass can heat the gas, the flow of coolant entering the reheat cooler 33 can be increased by increasing the opening of the first regulating valve 34, so that the gas is heated up; when the gas needs to be heated up, but the coolant output by the second pipe pass cannot heat the gas, the flow of coolant entering the reheat cooler 33 can be reduced by reducing the opening of the first regulating valve 34; when the gas needs to be cooled down, and the coolant output by the second pipe pass can cool the gas, the flow of coolant entering the reheat cooler 33 can be increased by increasing the opening of the first regulating valve 34; when the gas needs to be cooled down, but the coolant output by the second pipe pass cannot cool the gas, the flow of coolant entering the reheat cooler 33 can be reduced by reducing the opening of the first regulating valve 34.

[0054] like Figure 2-3 As shown, in some embodiments, a regulating branch 35 is arranged between the second pipe pass and the cold source unit 31, the regulating branch 35 is arranged in parallel with the reheat surface cooler 33, and a second regulating valve 36 is arranged on the regulating branch 35, and the second regulating valve 36 is used to adjust the coolant flow entering the regulating branch 35.

[0055] In the present application, the normal circulation of the coolant is ensured by setting the regulating branch 35, that is, after the flow rate of the coolant in the reheat cooler 33 is increased, the flow rate of the coolant flowing through the regulating branch 35 is correspondingly reduced; after the flow rate of the coolant in the reheat cooler 33 is reduced, the flow rate of the coolant flowing through the regulating branch 35 is correspondingly increased, thereby ensuring the normal circulation of the coolant, and then ensuring the temperature of the coolant at different positions, further improving the temperature control effect of the gas.

[0056] Specifically, a one-way valve 37 is arranged between the reheat cooler 33 and the cold source unit 31. The one-way valve 37 is arranged in parallel with the second regulating valve 36, which can prevent the coolant in the regulating branch 35 from entering the reheat cooler 33, thereby achieving precise control of the coolant flow passing through the reheat cooler 33, and further improving the control accuracy of the gas temperature.

[0057] In some embodiments, a first temperature sensor 4 and a second temperature sensor 5 are also included. The first temperature sensor 4 is used to detect the temperature of the output end of the second pipe, and the second temperature sensor 5 is used to detect the temperature of the air input end of the reheat cooler 33; wherein the first temperature sensor 4 and the second temperature sensor 5 control the opening 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 used to detect the temperature at the output end of the second tube pass, that is, the temperature of the coolant output from the second tube pass, and the second temperature sensor 5 is used to detect the temperature before entering the gas reheat cooler 33. By comparing the temperature detected by the first temperature sensor 4 with the temperature detected by the second temperature sensor 5, it can be known whether the coolant output from the second tube pass heats up or cools down the gas. If the gas needs to be heated and the coolant output from the second tube pass can heat the gas, the opening of the first regulating valve 34 is increased and the opening of the second regulating valve 36 is reduced, so that more coolant enters the reheat cooler 33 to heat the gas; if the gas needs to be heated but the coolant output from the second tube pass cannot heat the gas, the opening of the first regulating valve 34 is reduced and the opening of the second regulating valve 36 is increased to reduce or even prevent the coolant from entering the reheat cooler 33. If the gas needs to be cooled and the coolant output from the second pipe pass can cool the gas, the opening of the first regulating valve 34 is increased, and the opening of the second regulating valve 36 is reduced, so that more coolant enters the reheat cooler 33 to cool the gas; if the gas needs to be cooled but the coolant output from the second pipe pass cannot cool the gas, the opening of the first regulating valve 34 is reduced, and the opening of the second regulating valve 36 is increased, so as to reduce or even prevent the coolant from entering the reheat 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, it is necessary to increase the temperature detected by the second temperature sensor 5 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 plus the deviation temperature, it proves that the coolant 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 plus the deviation temperature, it proves that the coolant output by the second tube pass has a cooling effect on the gas.

[0060] In some embodiments, a third temperature sensor 6 is also included. The third temperature sensor 6 is used to detect the temperature of the supply air flow. 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. The controller adjusts the opening of the first regulating valve 34 and the second regulating 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 system adjustment indication. The temperature adjustment indication is: 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 heated up; 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 of the first regulating valve 34 and the second regulating valve 36 are controlled to adjust the flow of the coolant entering the reheat cooler 33 to achieve temperature increase or cooling of the gas. The temperature of the supply air flow can be automatically adjusted according to the set temperature range of the supply air flow.

[0062] Specifically, when the temperature adjustment indicates heating: if the coolant output from the second tube pass can heat up the gas, the flow rate of the coolant entering the reheat cooler 33 is increased; if the coolant output from the second tube pass cannot heat up the gas, the flow rate of the coolant entering the reheat cooler 33 is reduced or even avoided. When the temperature adjustment indicates cooling: if the coolant output from the second tube pass can cool down the gas, the flow rate of the coolant entering the reheat cooler 33 is increased; if the coolant output from the second tube pass cannot cool down the gas, the flow rate of the coolant entering the reheat cooler 33 is reduced or even avoided. When the temperature adjustment indicates maintaining the temperature, the flow rate of the coolant entering the reheat cooler 33 is kept unchanged.

[0063] In a specific embodiment, when the temperature detected by the third temperature sensor 6 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 of the first regulating valve 34 is controlled to increase, and the opening of the second regulating valve 36 is controlled to decrease; and / or when the temperature detected by the third temperature sensor 6 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 of the first regulating valve 34 is controlled to decrease, and the opening of the second regulating valve 36 is controlled to increase.

[0064] In the present application, when the temperature detected by the third temperature sensor 6 is lower than the set temperature range of the supply air flow, that is, the supply air temperature is lower than the set temperature range, at this time, if the temperature detected by the first temperature sensor 4 is higher than the temperature detected by the second temperature sensor 5 plus the deviation temperature, it proves that the coolant output by the second pipe pass can heat the gas, then the opening of the first regulating valve 34 is controlled to increase, and the opening of the second regulating valve 36 is controlled to decrease, thereby increasing the flow rate of the coolant entering the reheat cooler 33, thereby achieving the heating of the gas; at this time, if the temperature detected by the first temperature sensor 4 is lower than the temperature detected by the second temperature sensor 5 plus the deviation temperature, it proves that the coolant output by the second pipe pass can cool the gas, then the opening of the first regulating valve 34 is controlled to decrease, and the opening of the second regulating valve 36 is controlled to increase, thereby reducing the flow rate of the coolant entering the reheat cooler 33.

[0065] Specifically, when the gas temperature needs to be increased, but the coolant output from the second pipe side cools the gas, the opening of the first regulating valve 34 can be gradually reduced, or the first regulating valve 34 can be directly closed and the opening of the second regulating valve 36 can be 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 supply air flow, the openings of the first regulating valve 34 and the second regulating valve 36 are kept unchanged.

[0067] In the present application, when the temperature detected by the third temperature sensor 6 is within the set temperature range of the supply air flow, that is, the supply air temperature is within the set temperature range, there is no need to heat up or cool down the gas at this time, and the opening of the first regulating valve 34 and the second regulating valve 36 can be maintained.

[0068] In some embodiments, when the temperature detected by the third temperature sensor 6 is higher 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 of the first regulating valve 34 is controlled to decrease, and the opening of the second regulating valve 36 is controlled to increase; and / or when the temperature detected by the third temperature sensor 6 is higher 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 of the first regulating valve 34 is controlled to increase, and the opening of the second regulating valve 36 is controlled to decrease.

[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 supply airflow, that is, the air supply temperature is higher than the set temperature range, the gas needs to be cooled. If the temperature detected by the first temperature sensor 4 is lower than the temperature detected by the second temperature sensor 5 plus the deviation temperature, it proves that the coolant output by the second pipe pass can cool the gas, then increase the opening of the first regulating valve 34, reduce the opening of the second regulating valve 36, and increase the flow of coolant entering the reheat cooler 33; if the temperature detected by the first temperature sensor 4 is higher than the temperature detected by the second temperature sensor 5 plus the deviation temperature, it proves that the coolant output by the second pipe pass cannot cool the gas, then reduce the flow of coolant entering the reheat cooler 33.

[0070] Specifically, when the gas needs to be cooled, but the coolant output from the second pipe side causes the gas to heat up, the opening of the first regulating valve 34 can be gradually reduced, or the first regulating valve 34 can be directly closed and the opening of the second regulating valve 36 can be adjusted to the maximum.

[0071] In some embodiments, the refrigerant circulation system 2 also includes a temperature increasing branch 24 arranged between the compressor 21 and the throttling device 22. The temperature increasing branch 24 is arranged in parallel with the first pipe pass. A reheat condenser 25 and a third regulating valve 26 are arranged on the temperature increasing branch 24. The third regulating valve 26 is used to adjust the refrigerant flow rate flowing through the temperature increasing branch 24, and the controller controls the opening of the third regulating valve 26.

[0072] In the present application, a part of the refrigerant heated by the compressor 21 enters the heating branch 24, and the gas can be further heated by the reheat cooler, and the other part enters the first tube pass of the shell and tube condenser 1 to heat the coolant in the second tube pass. Specifically, the reheat cooler is located at the output end of the reheat cooler 33, that is, the gas first enters the reheat cooler 33, and then enters the reheat condenser 25. The refrigerant flow entering the heating branch 24 can be adjusted by the third regulating valve 26. If the coolant output from the second tube pass is not enough to adjust the temperature of the gas, the temperature of the gas can also be adjusted in cooperation with the reheat condenser 25.

[0073] Specifically, it is relatively rare to cool the air supply airflow. Generally, the air supply airflow is cooled by increasing the refrigerant flow in the fin evaporator 23 or increasing the coolant flow in the pre-cooling cooler 32. More commonly, the dehumidified gas is heated. In this application, the coolant output from the second pipe pass heats the gas at the reheating cooler 33, thereby separating the gas heating part from the refrigerant circulation system 2, so that the temperature and humidity of the gas can be independently controlled, thereby improving the accuracy of the gas temperature and humidity control.

[0074] In some embodiments, when the temperature detected by the third temperature sensor 6 is lower than the set temperature range of the supply 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 at the maximum, and the opening of the second regulating valve 36 is at the 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 supply 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 at the minimum, and the opening of the second regulating valve 36 is at the maximum, the opening of the third regulating valve 26 is controlled to increase.

[0075] In the present application, when encountering extreme situations, such as the need to heat the gas, the coolant output by the second pipe pass can heat the gas, but when the opening of the first regulating valve 34 has been adjusted to the maximum, the temperature of the supply air flow is still lower than the set temperature range of the supply air flow. At this time, the refrigerant flow in the reheat condenser 25 can be increased to increase the temperature of the supply air to the set temperature range; for example, when the gas needs to be heated, but the coolant output by the second pipe pass is insufficient to heat the gas, the first regulating valve 34 is closed. At this time, the supply air temperature is still lower than the set temperature range. In this case, the refrigerant flow in the reheat condenser 25 can be increased to increase the temperature of the supply air 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 supply 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 supply air temperature is within the set temperature range of the supply 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 opening of the first regulating valve 34, the second regulating valve 36 and the third regulating valve remains unchanged when the coolant is insufficient to regulate the temperature of the gas. If the gas temperature can be regulated by the coolant alone, the third regulating valve 26 is preferably kept closed. At this time, the gas temperature regulation is only completed by the coolant, and the gas dehumidification is only completed by the refrigerant circulation system 2, thereby ensuring that the temperature and humidity control of the gas are 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 supply 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 the minimum, and the opening of the second regulating valve 36 is the maximum, the opening 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 supply 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 the maximum, and the opening of the second regulating valve 36 is the minimum, the opening of the third regulating valve 26 is controlled to decrease.

[0080] In the present application, when encountering extreme situations, such as when the gas needs to be cooled, the coolant output by the second pipe pass can cool the gas, but the opening of the first regulating valve 34 has been adjusted to the maximum, and the air supply temperature is still higher than the set temperature range. At this time, the opening of the third regulating valve 26 can be reduced or even closed. For another example, when the gas needs to be cooled, the coolant output by the second pipe pass is not enough to cool the gas, and the opening of the first regulating valve 34 has been adjusted to the minimum. At this time, the opening of the third regulating valve 26 can be reduced or even closed.

[0081] In some embodiments, a humidity sensor 7 is also included, and the humidity sensor 7 is used to detect the humidity at the air output end of the fin evaporator 23; 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 remain 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 of the gas is improved; when the humidity of the gas is higher than the preset humidity range, the power of the compressor 21 is reduced, 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, this can also be accomplished by increasing the power of the compressor 21 .

[0084] The air conditioning device provided in the embodiment of the present application also includes a fan 8, which is used to supply air to the room, driving the external air to pass through the pre-cooling surface cooler 32, the fin evaporator 23, the reheat surface cooler 33 and the reheat condenser 25 in sequence to form an intake air flow to be delivered to the room.

[0085] The air conditioning device heats the dehumidified gas through the heat of the coolant circulation system 3. Compared with the prior art of dehumidifying and heating the gas through the refrigerant circulation system 2, it can achieve independent control of temperature and humidity, and effectively improve the accuracy of supply air temperature and humidity control.

[0086] like Figure 4 As shown, the embodiment of the present application provides a control method for the above air conditioning device, comprising the following steps:

[0087] S1, precooling the incoming air through the precooling surface cooler 32 of the air conditioning device;

[0088] S2, dehumidifying the air precooled by the precooling surface cooler 32 through the fin evaporator 23 of the air conditioning device;

[0089] S3. The air dehumidified by the fin evaporator 23 is heated by the reheat cooler 33 of the air conditioning device.

[0090] In the present application, the incoming air is precooled by the precooling surface cooler 32, and then the precooled gas is dehumidified by the fin evaporator 23 in the refrigerant circulation system 2, and then the dehumidified gas is heated by the reheating surface cooler 33 in the coolant circulation system 3, so that the dehumidification and heating of the gas are independent of each other, which makes it more convenient to adjust the temperature and humidity of the supply air, and improves the control accuracy of the supply air temperature and humidity.

[0091] In some embodiments, the coolant circulation system 3 of the air conditioning device includes a first regulating valve 34 disposed between the second tube pass of the shell and tube condenser 1 and the reheat cooler 33, and the first regulating valve 34 is used to adjust the coolant flow entering the reheat cooler 33; heating the air dehumidified by the fin evaporator 23 through the reheat cooler 33 of the air conditioning device includes:

[0092] S31 , adjusting the opening of the first regulating valve 34 , thereby adjusting the flow of coolant entering the reheat cooler 33 .

[0093] In the present application, by adjusting the flow rate of the coolant entering the reheat cooler 33, the temperature adjustment of the gas by the coolant is adjusted, so that the coolant can adjust the temperature of the gas more accurately.

[0094] In some embodiments, a regulating branch 35 is provided between the second pipe pass and the cold source unit 31 of the coolant circulation system 3, the regulating branch 35 is provided in parallel with the reheat cooler 33, a second regulating valve 36 is provided on the regulating branch 35, and the second regulating valve 36 is used to adjust the coolant flow entering the regulating branch 35, and the air dehumidified by the fin evaporator 23 is heated by the reheat cooler 33 of the air conditioning device, and the heating also includes:

[0095] S32, adjusting the opening of the first regulating valve 34 and the second regulating valve 36, thereby adjusting the flow of the coolant entering the reheat cooler 33.

[0096] In the present application, the first regulating valve 34 and the second regulating valve 36 are coordinated to ensure the normal circulation of the coolant in the coolant circulation system 3, thereby ensuring that the temperature of the coolant remains unchanged during the circulation process. The gas temperature can be regulated by only adjusting the flow rate of the coolant, which makes it more convenient to adjust the cooling effect in the reheat cooler 33.

[0097] like Figure 5 As shown, in some embodiments, the control method further includes:

[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 output end of the second tube pass and the temperature T4 of the air input end of the reheat cooler 33;

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

[0101] S321, if T1 is less than T2, and T3 is greater than T4, the opening of the first regulating valve 34 increases by ΔP1, and the opening of the second regulating valve 36 decreases by ΔP1;

[0102] S322, if T1 is less than T2, and T3 is less than T4, the opening of the first regulating valve 34 is reduced by ΔP1, and the opening of the second regulating valve 36 is increased by ΔP1;

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

[0104] S324, if T1 is greater than T2, and T3 is greater than T4, then the first regulating valve 34 is closed, and the opening 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 of the first regulating valve 34 increases by ΔP1, and the opening of the second regulating valve 36 decreases by ΔP1.

[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 output end of the second pipe pass is detected by the first temperature sensor 4, and the temperature T4 of the air input end of the reheat cooler 33 is detected by the second temperature sensor 5.

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

[0108] In some embodiments, the refrigerant circulation system 2 includes a cold source unit 31, a precooling surface cooler 32, a reheat surface cooler 33 and a temperature increase branch 24, the temperature increase branch 24 is arranged in parallel with the first tube pass of the shell and tube condenser 1, and a reheat condenser 25 and a third regulating valve 26 are arranged on the temperature increase branch 24, and the third regulating valve 26 is used to adjust the refrigerant flow through the temperature increase branch 24; the control method also includes at least one of the following:

[0109] S6. If T1 is less than T2, T3 is greater than T4, and the opening of the first regulating valve 34 is at the maximum, and the opening of the second regulating valve 36 is at the minimum, the opening of the third regulating valve 26 increases by ΔP2;

[0110] S7, if T1 is less than T2, T3 is less than T4, and the opening of the first regulating valve 34 is the smallest, and the opening of the second regulating valve 36 is the largest, then the opening of the third regulating valve 26 increases by ΔP2;

[0111] S8. If T1 is greater than T2, T3 is greater than T4, and the opening of the first regulating valve 34 is the smallest, and the opening of the second regulating valve 36 is the largest, then the opening of the third regulating valve 26 is reduced by ΔP2;

[0112] S9, if T1 is greater than T2, T3 is less than T4, and the opening of the first regulating valve 34 is at the maximum, and the opening of the second regulating valve 36 is at the minimum, then the opening of the third regulating valve 26 is reduced by ΔP2;

[0113] S10, if T1 is within T2, the openings 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 encountering some extreme situations, when the gas temperature cannot be adjusted by relying solely on the coolant, the reheat condenser 25 can be used to assist in adjusting the gas temperature to within the set temperature range, which can effectively cope with extreme working conditions and ensure the accuracy of the supply air temperature and humidity.

[0115] In some embodiments, the control method further includes supply air humidity control, and the supply air humidity control includes 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, the power of the compressor 21 of the air conditioning device is increased by ΔF;

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

[0118] S13: If W1 is within W2, the power of the compressor 21 is kept unchanged.

[0119] In the present application, the humidity regulation of the supply air flow is mainly completed by 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 reduced; 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 should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0121] Although the terms first, second, third, etc. can be used in the text to describe multiple 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 only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0122] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An air conditioning device, characterized in that: include: A shell and tube condenser having a first tube pass and a second tube pass; A refrigerant circulation system is connected to the first pipe pass, the refrigerant circulation system comprises a compressor, a throttling device and a fin evaporator, and the refrigerant in the refrigerant circulation system flows through the compressor, the first pipe pass, the throttling device and the fin evaporator in sequence, and returns to the compressor; as well as A coolant circulation system is connected to the second pipe pass, the coolant circulation system comprises a cold source unit, a precooling surface cooler and a reheating surface cooler, and the coolant in the coolant circulation system flows through the cold source unit, the precooling surface cooler, the second pipe pass and the reheating surface cooler in sequence, and returns to the cold source unit; The inlet air flow sequentially flows through the pre-cooling condenser, the fin evaporator and the reheating condenser to form a supply air flow.

2. The air conditioning device according to claim 1, characterized in that: A first regulating valve is provided between the second pipe pass and the reheat surface cooler, and the first regulating valve is used to adjust the flow of coolant entering the reheat surface cooler.

3. The air conditioning device according to claim 2, characterized in that: A regulating branch is arranged between the second pipe pass and the cold source unit, the regulating branch is arranged in parallel with the reheat surface cooler, a second regulating valve is arranged on the regulating branch, and the second regulating valve is used to regulate the flow of coolant entering the regulating branch.

4. The air conditioning device according to claim 3, characterized in that: It also includes a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is used to detect the temperature of the second tube output end, and the second temperature sensor is used to detect the temperature of the air input end of the reheat cooler; The first temperature sensor and the second temperature sensor control the opening of the first regulating valve and the second regulating valve through a controller.

5. The air conditioning device according to claim 4, characterized in that: It also includes a third temperature sensor, which 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 adjustment indication. The controller adjusts the opening of the first regulating valve and the second regulating valve according to the temperature adjustment indication.

6. The air conditioning device according to claim 5, characterized in that: 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 of the first regulating valve is controlled to increase, and the opening of the second regulating valve is controlled to decrease; 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 of the first regulating valve is controlled to decrease, and the opening of the second regulating valve is controlled to increase.

7. The air conditioning device according to claim 5, characterized in that: When the temperature detected by the third temperature sensor is within the set temperature range of the supply air flow, the openings of the first regulating valve and the second regulating valve are kept unchanged.

8. The air conditioning device according to claim 5, characterized in that: 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 of the first regulating valve is controlled to decrease, and the opening of the second regulating valve is controlled to increase; and / or 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 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 device according to any one of claims 5 to 8, characterized in that: The refrigerant circulation system also includes a temperature-increasing branch arranged between the compressor and the throttling device, the temperature-increasing branch is arranged in parallel with the first pipe pass, a reheat condenser and a third regulating valve are arranged on the temperature-increasing branch, the third regulating valve is used to adjust the refrigerant flow rate flowing through the temperature-increasing branch, and the controller controls the opening of the third regulating valve.

10. The air conditioning device according to claim 9, characterized in that: When the temperature detected by the third temperature sensor is lower than the set temperature range of the air supply airflow, 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 the maximum and the opening of the second regulating valve is the minimum, the opening 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 supply air 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 the minimum and the opening of the second regulating valve is the maximum, the opening of the third regulating valve is controlled to increase.

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

12. The air conditioning device according to claim 9, characterized in that: When the temperature detected by the third temperature sensor is higher than the set temperature range of the air supply airflow, 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 the minimum, and the opening of the second regulating valve is the 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 supply air 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 the maximum and the opening of the second regulating valve is the minimum, the opening of the third regulating valve is controlled to decrease.

13. The air conditioning device according to claim 1, characterized in that: Also included is a humidity sensor, the humidity sensor is used to detect the humidity at the air output end of the fin evaporator; Among them, when the humidity detected by the humidity sensor is greater than the set humidity range, the compressor power is controlled to increase; when the humidity detected by the humidity sensor is less than the set humidity range, the compressor power is controlled to decrease; when the humidity detected by the humidity sensor is within the set humidity range, the compressor power is controlled to remain unchanged.

14. A control method for an air conditioning device according to any one of claims 1 to 13, characterized in that: The steps include: Precooling the incoming air by means of a precooling surface cooler of the air conditioning device; Dehumidifying the air precooled by the precooling surface cooler through the fin evaporator of the air conditioning device; The air dehumidified by the fin evaporator is heated by the reheat surface cooler of the air conditioning device.

15. The control method according to claim 14, characterized in that: The coolant circulation system of the air conditioner comprises a first regulating valve disposed between the second tube pass of the shell and tube condenser and the reheat surface cooler, wherein the first regulating valve is used to regulate the coolant flow entering the reheat surface cooler; The step of heating the air dehumidified by the fin evaporator through the reheat cooler of the air conditioner comprises: The opening of the first regulating valve is adjusted to thereby adjust the coolant flow entering the reheat surface cooler.

16. The control method according to claim 15, characterized in that: A regulating branch is provided between the second pipe pass and the cold source unit of the coolant circulation system, the regulating branch is provided in parallel with the reheat surface cooler, a second regulating valve is provided on the regulating branch, and the second regulating valve is used to regulate the coolant flow entering the regulating branch, and the heating of the air dehumidified by the fin evaporator through the reheat surface cooler of the air conditioning device also includes: The openings of the first regulating valve and the second regulating valve are adjusted to thereby adjust the coolant flow entering the reheat cooler.

17. The control method according to claim 16, characterized in that: The control method further comprises: Obtaining the temperature T1 of the supply air flow, and comparing T1 with the set temperature range T2 of the supply air flow; Obtaining the temperature T3 of the output end of the second tube pass and the temperature T4 of the air input end of the reheat cooler; The adjusting the openings of the first regulating valve and the second regulating valve includes 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 increases by ΔP1, and the opening of the second regulating valve decreases by ΔP1; If T1 is less than T2, and T3 is less than T4, the opening of the first regulating valve decreases by ΔP1, and the opening of the second regulating valve increases by ΔP1; If T1 is within T2, the openings of the first regulating valve and the second regulating valve are 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 increases by ΔP1, and the opening of the second regulating valve decreases by ΔP1.

18. The control method according to claim 17, characterized in that: The refrigerant circulation system includes a cold source unit, a pre-cooling surface cooler, a reheating surface cooler and a temperature-increasing branch, the temperature-increasing branch is arranged in parallel with the first tube pass of the shell and tube condenser, the temperature-increasing branch is provided with a reheating condenser and a third regulating valve, and the third regulating valve is used to adjust the refrigerant flow through the temperature-increasing branch; the control method also includes 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 largest and the opening of the second regulating valve is the smallest, then the opening of the third regulating valve increases by ΔP2; If T1 is less than T2, T3 is less than T4, and the opening of the first regulating valve is the smallest, and the opening of the second regulating valve is the largest, then the opening of the third regulating valve increases by ΔP2; If T1 is greater than T2, T3 is greater than T4, and the opening of the first regulating valve is the smallest, and the opening of the second regulating valve is the largest, then the opening of the third regulating valve decreases by ΔP2; If T1 is greater than T2, T3 is less than T4, and the opening of the first regulating valve is the largest and the opening of the second regulating valve is the smallest, then the opening of the third regulating valve is reduced by ΔP2; If T1 is within T2, the openings of the first regulating valve, the second regulating valve and the third regulating valve are kept unchanged.

19. The control method according to claim 14, characterized in that: The control method further includes supply air humidity control, wherein the supply air humidity control includes at least one of the following: 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 conditioner increases 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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