A water-cooled unit, an air conditioner and an anti-condensation control method thereof

Abstract

The present invention discloses a water-cooled unit, an air conditioner and an anti-condensation control method thereof. The device comprises: a refrigeration cycle system; a branch pipe is led out at the outlet of the cooling water outlet pipe (7) of the condenser in the refrigeration cycle system to exchange heat with the inner housing of the water-cooled unit; the branch pipe is communicated with the cooling water drain pipe (9) of the condenser; the main pipe at the outlet of the cooling water outlet pipe (7) is also communicated with the cooling water drain pipe (9) of the condenser. This solution can improve the user experience by avoiding condensation on the outer shell of the water-cooled unit.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and particularly relates to a water-cooled unit, an air conditioner and an anti-condensation control method thereof, and more particularly to a water-cooled cabinet air conditioner control system for using the outlet water of cooling water for anti-condensation, a water-cooled cabinet air conditioner having the water-cooled cabinet air conditioner control system, and a control method for the water-cooled cabinet air conditioner to use the outlet water of cooling water for anti-condensation. Background Art

[0002] In related solutions, a water-cooled cabinet unit includes a mounting frame and an evaporator. An air inlet is provided at the front of the mounting frame and an air outlet is provided at the rear. The evaporator includes a first evaporator provided at the front air inlet and a second evaporator provided at the rear air outlet. When this unit operates in an environment with a relatively high humidity, condensation water droplets often gather at the bolts at the four corners of the top, and condensation water droplets gather and slide on both sides of the air outlet frame, affecting the user experience.

[0003] The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide a water-cooled unit, an air conditioner and an anti-condensation control method thereof, so as to solve the problem that the outer casing of the water-cooled unit is prone to condensation in an environment with a high humidity, affecting the user experience, and achieve the effect of improving the user experience by avoiding condensation on the outer casing of the water-cooled unit.

[0005] The present invention provides a water-cooled unit, including: a refrigeration cycle system; a branch pipe is led out at the outlet of the cooling water outlet pipe of the condenser in the refrigeration cycle system for heat exchange with the inner casing of the water-cooled unit; the branch pipe is communicated with the cooling water drain pipe of the condenser; the main pipe at the outlet of the cooling water outlet pipe is also communicated with the cooling water drain pipe of the condenser.

[0006] In some embodiments, a first switch is provided on the pipeline between the outlet of the cooling water outlet pipe and the branch pipe, or on the branch pipe; the first switch can control the water flow rate of the branch pipe; a second switch is provided on the pipeline between the outlet of the cooling water outlet pipe and the main pipe, or on the main pipe; and the second switch is located between the outlet of the cooling water outlet pipe and the outlet of the branch pipe; the second switch can control the water flow rate of the main pipe.

[0007] In some embodiments, the branch pipe is attached to the inner casing of the water-cooled unit and extends to the top of the water-cooled unit.

[0008] In some embodiments, the branch pipe includes a first main branch pipe, a second branch pipe, and a third branch pipe; the second branch pipe and the third branch pipe are arranged in parallel at the outlet of the first main branch pipe.

[0009] In some embodiments, the first main branch pipe is attached to the inner shell of the water-cooled unit, extends to the top of the water-cooled unit, and branches to form the second branch pipe and the third branch pipe.

[0010] In some embodiments, between the branch pipe and the water-cooled unit, at a portion of the branch pipe that does not contact the inner shell of the water-cooled unit, a heat-insulating member is provided.

[0011] In some embodiments, the routing form of the branch pipe includes at least one of a straight pipe form and a U-pipe form.

[0012] Matched with the above device, on the other hand, the present invention provides an air conditioner, including the above-mentioned water-cooled unit.

[0013] Matched with the above air conditioner, on the other hand, the present invention provides a method for controlling anti-condensation of an air conditioner, including: when the fan of the water-cooled unit operates at a set low fan speed in the cooling mode, obtaining the return air temperature and return air relative humidity at the return air grille of the front panel of the water-cooled unit; according to the return air temperature and return air relative humidity at the return air grille of the front panel of the water-cooled unit, controlling the opening degree of the first switch of the branch pipe and the opening degree of the second switch of the main pipe to reduce the water outlet temperature of the water outlet of the cooling water outlet pipe.

[0014] In some embodiments, according to the return air temperature and return air relative humidity at the return air grille of the front panel of the water-cooled unit, controlling the opening degree of the first switch of the branch pipe and the opening degree of the second switch of the main pipe includes: if the return air temperature is greater than or equal to the set temperature and the return air relative humidity is greater than or equal to the set value, controlling the first switch to open and controlling the opening degree of the first switch to increase with the increase of the return air temperature, and controlling the opening degree of the second switch to decrease and controlling the opening degree of the second switch to continue to decrease with the increase of the return air temperature; if the return air temperature is greater than or equal to the cooling water inlet temperature of the water inlet of the cooling water outlet pipe and the return air relative humidity is greater than or equal to the set value, controlling the first switch to open to the set maximum opening degree and controlling the opening degree of the second switch to decrease to the set minimum opening degree; if the return air temperature is less than the cooling water inlet temperature of the water inlet of the cooling water outlet pipe or the return air relative humidity is less than the set value, controlling the first switch to close and controlling the second switch to open to the set maximum opening degree.

[0015] Thus, in the solution of the present invention, a branch pipe is led out from the cooling water outlet pipe of the chiller and attached to the inner shell of the water-cooled cabinet unit for heat exchange, thereby avoiding condensation on the outer shell of the water-cooled unit and improving the user experience.

[0016] Other features and advantages of the present invention will be described in the following specification, and partly will become obvious from the specification, or will be understood by implementing the present invention.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an embodiment of the water-cooled unit of the present invention;

[0019] Figure 2 is a schematic structural diagram of an embodiment of the water-cooled cabinet air-conditioning control system of the present invention;

[0020] Figure 3 is a schematic diagram of the anti-condensation control flow of an embodiment of the water-cooled cabinet air-conditioning control system of the present invention;

[0021] Figure 4 is a schematic diagram of the flow direction of the cooling water outlet pipe of the water-cooled cabinet in an embodiment of the water-cooled cabinet air-conditioning control system of the present invention;

[0022] Figure 5 is a schematic diagram of the flow of the anti-condensation control method of the air conditioner of the present invention in an embodiment.

[0023] In combination with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0024] 1 - Temperature and humidity sensor; 2 - Controller; 3 - First solenoid valve; 4 - First main branch pipe; 5 - Second branch pipe; 6 - Third branch pipe; 7 - Cooling water outlet pipe; 8 - Second solenoid valve; 9 - Cooling water drain pipe; 10 - Drainage; 11 - Compressor; 12 - Shell and tube condenser; 13 - Cooling water inlet pipe; 14 - Water inlet; 15 - Expansion valve; 16 - Evaporator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] According to an embodiment of the present invention, a water-cooled unit is provided. Refer toFigure 1 Schematic structural diagram of an embodiment of the device of the present invention. The water-cooled unit may include: a refrigeration cycle system. At the outlet of the cooling water outlet pipe 7 of the condenser in the refrigeration cycle system (such as the second outlet of the outlet of the cooling water outlet pipe 7), a branch pipe is led out to exchange heat with the inner shell of the water-cooled unit. The branch pipe is attached to the inner shell of the water-cooled unit and can exchange heat with the inner shell of the water-cooled unit (i.e., the inner surface of the shell).

[0027] The branch pipe is communicated with the cooling water drain pipe 9 of the condenser. The main pipe at the outlet of the cooling water outlet pipe 7 (such as the first outlet of the outlet of the cooling water outlet pipe 7) is also communicated with the cooling water drain pipe 9 of the condenser. For example: the branch pipe and the main pipe at the outlet of the cooling water outlet pipe 7 (such as the first outlet of the outlet of the cooling water outlet pipe 7) are connected in parallel between the cooling water outlet pipe 7 and the cooling water drain pipe 9 of the condenser.

[0028] Specifically, at the outlet of the cooling water outlet pipe 7 of the condenser in the refrigeration cycle system, a main pipe is provided. The condenser of the refrigeration cycle system is, for example, a shell-and-tube condenser 12. At the outlet of the cooling water outlet pipe 7 of the condenser in the refrigeration cycle system, a branch pipe is also provided. The branch pipe is attached to the inner shell of the water-cooled unit and can exchange heat with the inner shell of the water-cooled unit. The branch pipe and the main pipe are arranged in parallel between the cooling water outlet pipe 7 and the cooling water drain pipe 9 of the condenser of the refrigeration cycle system.

[0029] Thus, by using the characteristic of the higher water temperature at the cooling water outlet, the first main branch pipe 4 is led out from the outlet of the shell-and-tube condenser 12 and attached to the inner shell of the water-cooled cabinet unit for heat exchange to avoid condensation, and at the same time, the cooling water drainage temperature is reduced.

[0030] In some embodiments, a first switch (such as a first solenoid valve 3) is provided on the pipeline between the outlet of the cooling water outlet pipe 7 and the branch pipe, or on the branch pipe. The first switch can control the water flow rate of the branch pipe.

[0031] A second switch (such as a second solenoid valve 8) is provided on the pipeline between the outlet of the cooling water outlet pipe 7 and the main pipe, or on the main pipe. And the second switch is located between the outlet of the cooling water outlet pipe 7 and the outlet of the branch pipe. The second switch can control the water flow rate of the main pipe.

[0032] When the fan of the water-cooled unit operates in the set low wind gear in the refrigeration mode, the controller of the refrigeration cycle system can control the opening degree of the first switch of the branch pipe and the opening degree of the second switch of the main pipe according to the return air temperature and the return air relative humidity at the return air grille of the front panel of the water-cooled unit, so as to reduce the water outlet temperature of the water outlet of the cooling water outlet pipe 7.

[0033] Specifically, a temperature and humidity sensor 1 is placed at the return air grille of the front panel of the unit. The temperature and humidity sensor 1 can detect the temperature of the air (such as the return air temperature T 回 ) and the relative humidity. The information detected by the temperature and humidity sensor 1 can be converted into a signal and sent to the controller 2. The controller 2 can adjust the opening degrees of the first electromagnetic valve 3 and the second electromagnetic valve 8 in front of the first main branch pipe 4 according to the signal, so as to control the water flow rate flowing from the first electromagnetic valve 3 to the first main branch pipe 4 at the outlet of the shell-and-tube condenser 12. The first electromagnetic valve 3 is in a normally closed state, and the second electromagnetic valve 8 is in a normally open state. The sum of the water flow rates passing through the first electromagnetic valve 3 and the second electromagnetic valve 8 is 100%. It operates when the unit is set to the low wind gear of the refrigeration mode. In this way, the cooling water outlet of the water-cooled cabinet air conditioner control system is divided into two paths. When the environmental relative humidity is relatively high, the heat of the cooling water outlet can be fully utilized to reduce the cooling water outlet temperature. At the same time, the air outlet volume and the refrigeration capacity will not be reduced, the condensation of the water-cooled cabinet machine can be avoided, and the user experience will not be affected.

[0034] In some embodiments, the controller controls the opening degree of the first switch of the branch pipe and the opening degree of the second switch of the main pipe according to the return air temperature and the return air relative humidity at the return air grille of the front panel of the water-cooled unit, including any of the following control situations:

[0035] The first control situation: If the return air temperature is greater than or equal to the set temperature and the return air relative humidity is greater than or equal to the set value, then control the first switch to open, and control the opening degree of the first switch to increase as the return air temperature rises, and control the opening degree of the second switch to decrease, and control the opening degree of the second switch to continue to decrease as the return air temperature rises.

[0036] Specifically, if the return air temperature T 回 ≥ the set temperature T0 °C and the relative humidity of the air ≥ the set value b, then control the first electromagnetic valve 3 to open and increase the opening degree of the first electromagnetic valve 3 as the return air temperature T 回 rises, and control the opening degree of the second electromagnetic valve 8 to decrease, and decrease the opening degree of the second electromagnetic valve 8 as the return air temperature T 回 rises.

[0037] The second control case: If the return air temperature is greater than or equal to the cooling water inlet temperature at the inlet of the cooling water outlet pipe 7 and the return air relative humidity is greater than or equal to the set value, then control the first switch to open to the set maximum opening degree and control the opening degree of the second switch to decrease to the set minimum opening degree.

[0038] Specifically, if the return air temperature T 回 ≥ the cooling water inlet temperature T1 °C and the relative humidity of the air ≥ the set value b, then control the first solenoid valve 3 to open to the maximum opening degree of 100% and control the opening degree of the second solenoid valve 8 to be the minimum (still in the open state).

[0039] The third control case: If the return air temperature is less than the cooling water inlet temperature at the inlet of the cooling water outlet pipe 7 or the return air relative humidity is less than the set value, then control the first switch to close and control the second switch to open to the set maximum opening degree.

[0040] Specifically, if the return air temperature T 回 < the cooling water inlet temperature T1 °C or the relative humidity of the air ≤ the set value b, then control the first solenoid valve 3 to close and control the second solenoid valve 8 to open to the maximum opening degree of 100%.

[0041] In some embodiments, the branch pipe is attached to the inner shell of the water-cooled unit and extends to the top of the water-cooled unit.

[0042] In some embodiments, the branch pipe includes: a first main branch pipe 4, a second branch pipe 5, and a third branch pipe 6. The second branch pipe 5 and the third branch pipe 6 are arranged in parallel at the outlet of the first main branch pipe 4. The inlets of the second branch pipe 5 and the third branch pipe 6 are communicated with the outlet of the first main branch pipe 4. The outlets of the second branch pipe 5 and the third branch pipe 6 are communicated with the inlet of the cooling water drain pipe 9.

[0043] In some embodiments, the first main branch pipe 4 is attached to the inner shell of the water-cooled unit, extends to the top of the water-cooled unit, and branches to form the second branch pipe 5 and the third branch pipe 6.

[0044] Specifically, the first main branch pipe 4 is a branch pipe led out from the outlet of the unit shell-and-tube condenser 12. This first main branch pipe 4 is attached to the central shell at the back inside the unit, extends upward to the top of the unit, and branches into the second branch pipe 5 and the third branch pipe 6 at the top of the unit.

[0045] Among them, the second branch pipe 5 extends from the top center of the back of the unit to the upper left rear corner, then to the upper left front corner of the air outlet frame, and then passes downward through the hole beside the water receiving tray and is connected to the condenser drain pipe 9. The third branch pipe 6 extends from the top center of the back of the unit to the upper right rear corner, then to the upper right front corner of the air outlet frame, and then passes downward through the hole beside the water receiving tray and is connected to the condenser drain pipe 9.

[0046] In some embodiments, between the branch pipe and the water-cooled unit, at a portion of the branch pipe that does not contact the inner shell of the water-cooled unit, a heat-insulating member (such as heat-insulating sponge) is provided.

[0047] Specifically, the branch pipes (such as the first main branch pipe 4, the second branch pipe 5, and the third branch pipe 6) are all attached to the inner shell of the unit, and the portions that do not contact the unit are fitted with sponge for heat insulation. The inlet temperature of the first main branch pipe 4 (i.e., the water temperature at the outlet of the cooling water) is about (T1 + a) °C, which is higher than the indoor ambient temperature. Therefore, the cooling water outlet can be passed through the branch pipes (such as the first main branch pipe 4, the second branch pipe 5, and the third branch pipe 6) to exchange heat with the unit shell. The cooling water outlet flows through the branch pipes, and its temperature can be reduced after exchanging heat with the shell, thereby reducing the cooling water drainage temperature, being more environmentally friendly, being able to reduce the cooling water outlet temperature. If the water system is a closed-loop system, the system refrigeration load can be reduced, thereby reducing the power consumption of the refrigeration system and achieving a certain energy-saving effect.

[0048] In some embodiments, the routing form of the branch pipe includes at least one of a straight pipe form and a U-pipe form.

[0049] Specifically, the routing form of the branch pipe is not limited to a straight pipe and can be made into forms such as a U-pipe, and other components are omitted. The branch pipe can be arranged in a U-tube shape to increase the heat exchange area and thus strengthen the heat exchange.

[0050] After a large number of experimental verifications, by adopting the technical solution of the present invention, a branch pipe is led out from the cooling water outlet pipe of the chiller and attached to the inner shell of the water-cooled cabinet unit for heat exchange, thereby avoiding condensation on the outer shell of the water-cooled unit and improving the user experience.

[0051] According to an embodiment of the present invention, there is also provided an air conditioner corresponding to the water-cooled unit. This air conditioner may include: the above-mentioned water-cooled unit.

[0052] In some embodiments, the solution of the present invention provides a water-cooled cabinet air-conditioning system for preventing condensation by using the cooling water outlet. A branch pipe is led out from the cooling water outlet pipe and attached to the inner shell of the water-cooled cabinet unit for heat exchange to avoid condensation and reduce the cooling water drainage temperature.

[0053] Among them, by adjusting the cooling water outlet flow rate to control the shell temperature, the condensation on the outside of the shell can be solved, and the condensation on the outside of the unit shell can be avoided; and the cooling water drainage temperature can be reduced.

[0054] Specifically, in the solution of the present invention, taking advantage of the characteristic that the water temperature at the outlet of the cooling water is relatively high, the shell of the water-cooled cabinet unit is heated. The pipeline can cover the key condensation areas of the unit, so that the temperature of the unit shell rises, increasing the temperature difference between the outside of the unit shell and the ambient air around, so as to effectively avoid the generation of condensation on the outside of the unit shell under the same relative humidity, and solve the problem that the outer shell of the water-cooled cabinet unit is prone to condensation when the environmental humidity is relatively high.

[0055] In the solution of the present invention, the cooling water outlet flows through the branch pipe, and its temperature can be reduced after heat exchange with the shell, thereby reducing the cooling water drainage temperature, which is more environmentally friendly and solves the problem of high cooling water drainage temperature.

[0056] The following combines Figures 2 to 3 the examples shown to exemplarily illustrate the specific implementation process of the solution of the present invention.

[0057] Figure 2 is a schematic structural diagram of an embodiment of the water-cooled cabinet air-conditioning control system of the present invention. As Figure 2 shown, the water-cooled cabinet air-conditioning control system, that is, the refrigeration cycle system of the water-cooled cabinet unit, includes: a temperature and humidity sensor 1, a controller 2, a first solenoid valve 3, a first main branch pipe 4, a second branch pipe 5, a third branch pipe 6, a cooling water outlet pipe 7, a second solenoid valve 8, a cooling water drainage pipe 9, a drain 10, a compressor 11, a shell-and-tube condenser 12, a cooling water inlet pipe 13, a water inlet 14, an expansion valve 15, and an evaporator 16. The expansion valve 15 usually adopts a thermostatic expansion valve; the operating environment of the unit: indoors, the cooling water inlet temperature is T1 °C. When the unit is set to the cooling temperature of 16 °C and the set air volume is the low air volume, the air outlet temperature of the unit is less than 16 °C and the wind speed is slow, resulting in a relatively low temperature on the outside of the shell on both sides of the air outlet frame of the unit. Usually, the temperature of the shell near the air outlet frame is about the set temperature T0 °C.

[0058] Among them, the temperature and humidity sensor 1 is connected to the controller 2, and the controller 2 is connected to the control ends of the first solenoid valve 3 and the second solenoid valve 8. The shell-and-tube condenser 12, after passing through the cooling water outlet pipe 7, on the one hand, is connected to the first main branch pipe 4 through the first solenoid valve 3, and on the other hand, is connected to the drain 10 through the second solenoid valve 8 and the cooling water drainage pipe 9. The first main branch pipe 4 is then connected to the cooling water drainage pipe 9 respectively through the parallel second branch pipe 5 and third branch pipe 6. The water inlet 14 is connected to the shell-and-tube condenser 12 through the cooling water inlet pipe 13. The shell-and-tube condenser 12 is connected to the evaporator 16 through the expansion valve 15. The evaporator 16 is connected to the shell-and-tube condenser 12 through the compressor 11.

[0059] In the solution of the present invention, by using the characteristic that the water temperature at the outlet of the cooling water is relatively high, a first main branch pipe 4 is led out from the outlet of the shell-and-tube condenser 12 and attached to the inner shell of the water-cooled cabinet unit (i.e., the inner surface of the shell) for heat exchange to avoid condensation, and at the same time, the drainage temperature of the cooling water is reduced. Figure 2 In the example shown, in the solution of the present invention, a temperature and humidity sensor 1 is placed at the return air grille of the front panel of the unit. The temperature and humidity sensor 1 can detect the temperature of the air (such as the return air temperature T 回 ), and the relative humidity. The information detected by the temperature and humidity sensor 1 can be converted into a signal and sent to the controller 2. The controller 2 can adjust the opening degrees of the first solenoid valve 3 and the second solenoid valve 8 in front of the first main branch pipe 4 according to this signal, so as to control the water flow rate flowing from the first solenoid valve 3 to the first main branch pipe 4 at the outlet of the shell-and-tube condenser 12. In this way, the cooling water outlet of the water-cooled cabinet air-conditioning control system is divided into two paths. When the environmental relative humidity is relatively high, the heat of the cooling water outlet can be fully utilized to reduce the cooling water outlet temperature. At the same time, the air volume and refrigerating capacity will not be reduced, condensation of the water-cooled cabinet unit can be avoided, and the user experience will not be affected.

[0060] The shell of the water-cooled cabinet unit is divided into the inner surface of the shell and the outer surface of the shell. The inner surface of the shell only contacts with the branch pipe and the heat insulation material, and the outer surface of the shell contacts with the environment.

[0061] Figure 3 It is a schematic diagram of the anti-condensation control process of an embodiment of the water-cooled cabinet air-conditioning control system of the present invention. As Figure 3 shown, the anti-condensation control process of the water-cooled cabinet air-conditioning control system includes:

[0062] Step 1: The temperature and humidity sensor 1 detects the temperature of the air (such as the return air temperature T 回 ), and the relative humidity.

[0063] Step 2: Judge whether the fan is in the low wind gear in the refrigeration mode. If so, execute Step 3; otherwise, control the first solenoid valve 3 to close, and control the opening degree of the second solenoid valve 8 to be the largest, and then return to Step 1.

[0064] Step 3: Judge whether the relative humidity of the air is greater than or equal to the set value b. If so, execute Step 4; otherwise, control the first solenoid valve 3 to close, and control the opening degree of the second solenoid valve 8 to be the largest, and then return to Step 1.

[0065] Step 4: Judge whether the return air temperature T 回 is less than the set temperature T0. If so, control the first solenoid valve 3 to open, and control the second solenoid valve 8 to close slightly, and then return to Step 1; otherwise, execute Step 5.

[0066] Step 5: Judge whether the return air temperature T 回Is it greater than or equal to the set temperature T0 and less than the cooling water inlet temperature T1? If so, execute step 6; otherwise, control the first solenoid valve 3 to close and control the second solenoid valve 8 to open to the maximum, and then return to step 1.

[0067] Step 6, determine the return air temperature T 回 Is it increasing? If so, control the first solenoid valve 3 to open wider and control the second solenoid valve 8 to open less; otherwise, control the first solenoid valve 3 to open less and control the second solenoid valve 8 to open wider, and then return to step 1.

[0068] In the example as Figure 3 shown, the first solenoid valve 3 is in a normally closed state, the second solenoid valve 8 is in a normally open state, the sum of the water flow rates through the first solenoid valve 3 and the second solenoid valve 8 is 100%, and the unit operates in the low wind speed setting of the refrigeration mode. The control logic of the controller 2 is as follows:

[0069] If the return air temperature T 回 ≥ the set temperature T0 °C and the relative humidity of the air ≥ the set value b, then control the first solenoid valve 3 to open and increase the opening of the first solenoid valve 3 as the return air temperature T 回 rises, and control the second solenoid valve 8 to open less and decrease the opening of the second solenoid valve 8 as the return air temperature T 回 rises.

[0070] If the return air temperature T 回 ≥ the cooling water inlet temperature T1 °C and the relative humidity of the air ≥ the set value b, then control the first solenoid valve 3 to open to the maximum opening of 100% and control the second solenoid valve 8 to open to the minimum (still in the open state).

[0071] If the return air temperature T 回 < the cooling water inlet temperature T1 °C or the relative humidity of the air ≤ the set value b, control the first solenoid valve 3 to close and control the second solenoid valve 8 to open to the maximum opening of 100%.

[0072] Figure 4 This is a schematic diagram of the flow direction of the cooling water outlet pipe of the water-cooled cabinet air conditioner control system of the present invention. As Figure 4 shown, the first main branch pipe 4 is a branch pipe led out from the outlet of the unit shell-and-tube condenser 12. The first main branch pipe 4 is attached to the center of the inner back of the unit housing and extends upward to the top of the unit, and is divided into a second branch pipe 5 and a third branch pipe 6 at the top of the unit.

[0073] Among them, the second branch pipe 5 extends from the top center of the back of the unit to the upper left rear corner, then to the upper left front corner of the air outlet frame, and then goes down through the hole beside the water receiving tray and is connected to the condenser drain pipe 9. The inner back center refers to the sheet metal part (or the back shell) behind the unit, the side facing inside (i.e., the inner part), and the side facing outside is called the outer part. The center refers to the central axis (i.e., the axis parallel to the left and right sides of the unit).

[0074] The third branch pipe 6 extends from the top center of the back of the unit to the upper right rear corner, then to the upper right front corner of the air outlet frame, and then goes down through the hole beside the water receiving tray and is connected to the condenser drain pipe 9.

[0075] The above-mentioned branch pipes (such as the first main branch pipe 4, the second branch pipe 5, and the third branch pipe 6) are all attached to the inner shell of the unit, and the parts not in contact with the unit are fitted with sponge for heat preservation. The inlet temperature of the first main branch pipe 4 (i.e., the water temperature at the outlet of the cooling water) is about (T1 + a) °C, which is higher than the indoor ambient temperature. Therefore, the cooling water outlet can be passed through the branch pipes (such as the first main branch pipe 4, the second branch pipe 5, and the third branch pipe 6) to exchange heat with the unit shell. The cooling water outlet flows through the branch pipes and exchanges heat with the shell, which can reduce its temperature, thereby reducing the cooling water drainage temperature, being more environmentally friendly, and being able to reduce the cooling water outlet temperature. If the water system is a closed-loop circulation system, it can reduce the system refrigeration load, thereby reducing the power consumption of the refrigeration system and achieving a certain energy-saving effect.

[0076] Among them, a is the set temperature value. The set temperature T0, the cooling water inlet temperature T1, the set temperature value a, and the set value b can take values of 20, 23, 4, and 80% respectively.

[0077] In the example as Figure 4 shown, the dash line is the cooling water inlet, the dotted line is the cooling water outlet, and the water flow direction is as shown by the arrow. Among them, Figure 4 the form of the middle branch pipe is not limited to a straight pipe and can be made into a U-shaped pipe or other forms, and other components are omitted. The branch pipe can be arranged in a U-shaped tube to increase the heat exchange area and thus strengthen the heat exchange.

[0078] Since the processing and functions achieved by the air conditioner in this embodiment are basically corresponding to the embodiments, principles, and examples of the device Figure 1 shown above, for the parts not described in detail in the description of this embodiment, reference can be made to the relevant descriptions in the foregoing embodiments and will not be elaborated here.

[0079] After a large number of experimental verifications, by adopting the technical solution of the present invention, a branch pipe is led out from the cooling water outlet pipe of the chiller and attached to the inner shell of the water-cooled cabinet unit for heat exchange. By adjusting the flow rate of the cooling water outlet, the shell temperature is controlled to avoid condensation on the outside of the unit shell.

[0080] According to an embodiment of the present invention, there is also provided a method for controlling anti-condensation of an air conditioner corresponding to the air conditioner, as Figure 5 shown in the flowchart of an embodiment of the method of the present invention. The anti-condensation control method of the air conditioner may include: step S110 and step S120.

[0081] At step S110, when the fan of the water-cooled unit operates at a set low fan speed in the cooling mode, obtain the return air temperature and return air relative humidity at the return air grille of the front panel of the water-cooled unit.

[0082] At step S120, according to the return air temperature and return air relative humidity at the return air grille of the front panel of the water-cooled unit, control the opening degree of the first switch of the branch pipe and the opening degree of the second switch of the main pipe to reduce the outlet water temperature of the outlet of the cooling water outlet pipe 7.

[0083] Specifically, place a temperature and humidity sensor 1 at the return air grille of the front panel of the unit. The temperature and humidity sensor 1 can detect the temperature of the air (such as the return air temperature T 回 ) and the relative humidity. The information detected by the temperature and humidity sensor 1 can be converted into a signal and sent to the controller 2. The controller 2 can adjust the opening degrees of the first solenoid valve 3 and the second solenoid valve 8 in front of the first main branch pipe 4 according to this signal, so as to control the water flow rate flowing from the first solenoid valve 3 to the first main branch pipe 4 at the outlet of the shell-and-tube condenser 12. The first solenoid valve 3 is in a normally closed state, the second solenoid valve 8 is in a normally open state, and the sum of the water flow rates passing through the first solenoid valve 3 and the second solenoid valve 8 is 100%. It operates when the unit is set to the low fan speed in the cooling mode. In this way, the cooling water outlet of the water-cooled cabinet air conditioner control system is divided into two paths. When the ambient relative humidity is relatively high, the heat of the cooling water outlet can be fully utilized to reduce the cooling water outlet temperature. At the same time, the air volume and cooling capacity will not be reduced, and condensation of the water-cooled cabinet machine can be avoided, and the user experience will not be affected.

[0084] In some embodiments, in step S120, according to the return air temperature and return air relative humidity at the return air grille of the front panel of the water-cooled unit, controlling the opening degree of the first switch of the branch pipe and the opening degree of the second switch of the main pipe includes any of the following control situations:

[0085] The first control situation: If the return air temperature is greater than or equal to the set temperature and the return air relative humidity is greater than or equal to the set value, control the first switch to open, and control the opening degree of the first switch to increase as the return air temperature rises, and control the opening degree of the second switch to decrease, and control the opening degree of the second switch to continue to decrease as the return air temperature rises.

[0086] Specifically, if the return air temperature T 回≥Set temperature T0 °C and relative humidity of air ≥ set value b, then control the first solenoid valve 3 to open, and as the return air temperature T 回 rises, increase the opening degree of the first solenoid valve 3, and control the opening degree of the second solenoid valve 8 to decrease, and as the return air temperature T 回 rises, decrease the opening degree of the second solenoid valve 8.

[0087] The second control situation: If the return air temperature is greater than or equal to the cooling water inlet temperature of the water inlet of the cooling water outlet pipe 7 and the return air relative humidity is greater than or equal to the set value, then control the first switch to open to the set maximum opening degree, and control the opening degree of the second switch to decrease to the set minimum opening degree.

[0088] Specifically, if the return air temperature T 回 ≥ cooling water inlet temperature T1 °C and relative humidity of air ≥ set value b, then control the first solenoid valve 3 to open at the maximum opening degree of 100%, and control the opening degree of the second solenoid valve 8 to be the minimum (still in the open state).

[0089] The third control situation: If the return air temperature is less than the cooling water inlet temperature of the water inlet of the cooling water outlet pipe 7 or the return air relative humidity is less than the set value, then control the first switch to close, and control the second switch to open to the set maximum opening degree.

[0090] Specifically, if the return air temperature T 回 < cooling water inlet temperature T1 °C or relative humidity of air ≤ set value b, control the first solenoid valve 3 to close, and control the second solenoid valve 8 to open at the maximum opening degree of 100%.

[0091] Thus, place the temperature and humidity sensor 1 at the return air grille of the front panel of the unit. The temperature and humidity sensor 1 can detect the temperature of the air (such as the return air temperature T 回 ), and the relative humidity. The information detected by the temperature and humidity sensor 1 can be converted into a signal and sent to the controller 2. The controller 2 can adjust the opening degrees of the first solenoid valve 3 and the second solenoid valve 8 in front of the first main branch pipe 4 according to this signal, so as to control the water flow rate flowing from the first solenoid valve 3 to the first main branch pipe 4 at the outlet of the shell and tube condenser 12. In this way, the cooling water outlet of the water-cooled cabinet air conditioner control system is divided into two paths. When the environmental relative humidity is relatively high, the heat of the cooling water outlet can be fully utilized, the cooling water outlet temperature can be reduced, and at the same time, the air volume and refrigerating capacity will not be reduced, the condensation of the water-cooled cabinet machine can be avoided, and the user experience will not be affected.

[0092] Since the processing and functions realized by the method of this embodiment are basically corresponding to the embodiments, principles and examples of the foregoing air conditioner, for the parts not detailed in the description of this embodiment, reference can be made to the relevant descriptions in the foregoing embodiments, and details will not be repeated here.

[0093] After a large number of experimental verifications, by adopting the technical solution of this embodiment, a branch pipe is led out from the cooling water outlet pipe of the chiller and attached to the inner shell of the water-cooled cabinet unit for heat exchange. The cooling water flows through the branch pipe, and its temperature can be reduced after heat exchange with the shell, thereby reducing the cooling water drainage temperature and being more environmentally friendly.

[0094] In summary, it is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0095] The above are only the embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A water-cooled unit, characterized in that, including: a refrigeration cycle system; At the outlet of the cooling water outlet pipe (7) of the condenser in the refrigeration cycle system, a branch pipe is led out to exchange heat with the inner shell of the water-cooled unit; on the pipeline between the outlet of the cooling water outlet pipe (7) and the branch pipe, or on the branch pipe, a first switch is provided; the first switch can control the water flow rate of the branch pipe; on the pipeline between the outlet of the cooling water outlet pipe (7) and the main pipe, or on the main pipe, a second switch is provided; and the second switch is located between the outlet of the cooling water outlet pipe (7) and the outlet of the branch pipe; the second switch can control the water flow rate of the main pipe; The branch pipe communicates with the cooling water drain pipe (9) of the condenser; the main pipe at the outlet of the cooling water outlet pipe (7) also communicates with the cooling water drain pipe (9) of the condenser; by leading out a branch pipe from the cooling water outlet pipe of the chiller and attaching it to the inner shell of the water-cooled cabinet unit for heat exchange; the branch pipe includes: a first main branch pipe (4), a second branch pipe (5) and a third branch pipe (6); the second branch pipe (5) and the third branch pipe (6) are arranged in parallel at the outlet of the first main branch pipe (4).

2. The water-cooled unit according to claim 1, wherein, The branch pipe is attached to the inner shell of the water-cooled unit and extends to the top of the water-cooled unit.

3. The water-cooled unit according to claim 1, wherein The first main branch pipe (4) is attached to the inner shell of the water-cooled unit, extends to the top of the water-cooled unit and branches to form the second branch pipe (5) and the third branch pipe (6).

4. The water-cooled unit according to any one of claims 2 to 3, characterized in that, Between the branch pipe and the water-cooled unit, at the part of the branch pipe that does not contact the inner shell of the water-cooled unit, a heat insulation member is provided.

5. The water-cooled unit according to any one of claims 2 to 3, characterized in that The running form of the branch pipe includes at least one of a straight pipe form and a U-pipe form.

6. An air conditioner, characterized in that, including: The water-cooled unit according to any one of claims 1 to 5.

7. A method for controlling anti-condensation of an air conditioner as described in claim 6, characterized in that, including: When the fan of the water-cooled unit operates in the set low wind gear in the refrigeration mode, obtain the return air temperature and return air relative humidity at the return air grille of the front panel of the water-cooled unit; According to the return air temperature and return air relative humidity at the return air grille of the front panel of the water-cooled unit, control the opening degrees of the first switch of the branch pipe and the second switch of the main pipe to reduce the water temperature at the outlet of the cooling water outlet pipe (7).

8. The anti-condensation control method of the air conditioner according to claim 7, wherein According to the return air temperature and return air relative humidity at the return air grille of the front panel of the water-cooled unit, controlling the opening degrees of the first switch of the branch pipe and the second switch of the main pipe includes: If the return air temperature is greater than or equal to the set temperature and the return air relative humidity is greater than or equal to the set value, then control the first switch to open and control the opening degree of the first switch to increase as the return air temperature rises, and control the opening degree of the second switch to decrease and control the opening degree of the second switch to continue to decrease as the return air temperature rises; If the return air temperature is greater than or equal to the cooling water inlet temperature at the inlet of the cooling water outlet pipe (7), and the return air relative humidity is greater than or equal to the set value, then control the first switch to open to the set maximum opening degree, and control the opening degree of the second switch to decrease to the set minimum opening degree; If the return air temperature is less than the cooling water inlet temperature at the inlet of the cooling water outlet pipe (7) or the return air relative humidity is less than the set value, then control the first switch to close, and control the second switch to open to the set maximum opening degree.

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