Heat exchange unit

Abstract

The utility model relates to the technical field of refrigeration equipment, and particularly discloses a heat exchange unit. The heat exchange unit comprises a heat exchange core body, a water treatment device and a spraying loop, spraying liquid circulates in the spraying loop, the spraying loop is used for spraying the spraying liquid to the heat exchange core body, a liquid storage tank and a valve are arranged in the spraying loop, and the valve is used for switching the spraying loop between a first state and a second state; in the first state, the water treatment device is connected into the spraying loop, and spraying return liquid in the spraying loop enters the liquid storage tank to circulate after being treated by the water treatment device; in the second state, the inlet of the water treatment device is communicated with the liquid supplementing opening, and spraying return liquid in the spraying loop is bypassed to the liquid storage tank for circulation. By applying the heat exchange unit provided by the utility model, the circulating spray liquid can be treated in real time, the water quality of the spray liquid is ensured, the maintenance frequency of the heat exchange core body structure is reduced, and the heat exchange efficiency of the heat exchange core body is ensured.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and more specifically, to a heat exchange unit. Background Technology

[0002] With the rise of the internet, big data, and 5G, data centers have developed rapidly. Due to the high heat load density and energy consumption per unit area of ​​data centers, efficient heat dissipation has a significant impact on their reliable operation. Heat exchange units are widely used in the data center field.

[0003] In the process of developing this application, the inventors discovered at least the following problems in the prior art:

[0004] Common heat exchanger units typically use flushing and blowdown methods, which can lead to ion accumulation in the storage tank, making it prone to clogging. Furthermore, heat exchanger units generally operate using a circulating water recovery system, which easily causes scaling on the heat exchanger core, reducing its heat exchange performance. Therefore, regular manual cleaning and maintenance are required, increasing labor costs. Some systems utilize centralized water treatment in the heat exchanger room, but this requires large storage tanks and water softening resin, resulting in higher costs. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a heat exchange unit that can effectively improve the problem that heat exchange units are prone to scaling of the heat exchange core, which leads to a decrease in the heat exchange performance of the heat exchange core.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A heat exchange unit, comprising:

[0008] Heat exchanger core;

[0009] Water treatment equipment;

[0010] A spray circuit is provided, in which spray liquid circulates and is used to spray the spray liquid onto the heat exchange core. The spray circuit is equipped with a liquid storage tank and a valve, and the valve is used to switch the spray circuit between a first state and a second state.

[0011] In the first state, the water treatment device is connected to the spray circuit, and the spray return liquid is processed by the water treatment device and then enters the storage tank for circulation. The spray return liquid includes the spray liquid collected after being sprayed onto the heat exchange core. In the second state, the inlet of the water treatment device is connected to the replenishment port, and the spray return liquid in the spray circuit is bypassed to the storage tank for circulation.

[0012] Optionally, in the above heat exchange unit, the water treatment device includes a water softener, a salt storage tank, and a control valve. The water softener is connected to the spray circuit through the control valve, and the salt storage tank is connected to the water softener through the control valve. The control valve is used to control the water softener to communicate with the salt storage tank and disconnect from the liquid storage tank to perform the regeneration treatment of the water softener, or to control the salt storage tank to disconnect from the water softener and communicate with the liquid storage tank to perform the softening treatment of the water softener.

[0013] The valve is used to switch the spray circuit to the first state when the water softener is performing softening treatment, and to switch the spray circuit to the second state when the water softener is performing regeneration treatment.

[0014] Optionally, in the above heat exchange unit, the liquid storage tank is equipped with a liquid level detection device, and the valve is also used to switch the spray circuit to the second state when the liquid level in the liquid storage tank detected by the liquid level detection device is not greater than a first preset liquid level, and to switch the spray circuit to the first state when the liquid level in the liquid storage tank detected by the liquid level detection device reaches the second preset liquid level.

[0015] Optionally, in the above heat exchange unit, a filter is provided in the spray circuit for filtering the spray liquid.

[0016] Optionally, in the heat exchange unit described above, the spray circuit is further provided with a conductivity detection device for detecting the conductivity of the spray liquid;

[0017] The storage tank is connected to a drain valve, which is used to open when the conductivity detected by the conductivity detection device is greater than a preset conductivity to drain the spray liquid, and to close when the liquid level in the storage tank drops to a first preset level.

[0018] Optionally, in the above heat exchanger unit, the spray circuit includes a spray device and a spray liquid collection device. The spray liquid collection device is located below the spray device and is used to collect the spray liquid. The outlet of the spray liquid collection device is connected to the inlet of the water treatment device through a return liquid pipeline and to the inlet of the storage tank through a bypass pipeline.

[0019] Optionally, in the above heat exchanger unit, the valve includes a first valve located in the return liquid pipeline and a second valve located in the bypass pipeline, wherein the first valve is connected to a replenishment liquid pipeline;

[0020] The inlet of the first valve may optionally be connected to one of the outlet of the spray liquid collection device and the outlet of the replenishment pipe, and the outlet of the first valve is connected to the inlet of the water treatment device; the inlet of the second valve is connected to the outlet of the spray liquid collection device, and the outlet of the second valve is connected to the inlet of the storage tank;

[0021] In the first state, the inlet of the first valve is connected to the outlet of the spray liquid collection device, and the second valve is closed;

[0022] In the second state, the inlet of the first valve is connected to the outlet of the replenishment pipe, and the second valve is open.

[0023] Optionally, in the above heat exchange unit, the first valve is a three-way valve, and the three ports of the three-way valve are respectively connected to the outlet of the spray liquid collection device, the replenishment pipe and the inlet of the water treatment device;

[0024] Alternatively, the first valve may include two two-way valves, one of which is connected between the outlet of the spray liquid collection device and the inlet of the water treatment device, and the other is connected between the replenishment pipe and the inlet of the water treatment device.

[0025] The heat exchanger unit provided by this invention integrates a water treatment device into the unit. During spray circuit operation, a valve switches the spray circuit to its first state. The spray return liquid from the spray circuit is treated by the water treatment device and then enters the storage tank for circulation. This allows for real-time treatment of the circulating spray liquid, ensuring its quality and reducing maintenance frequency of the heat exchange core structure. This guarantees the heat exchange efficiency of the heat exchange core, enabling continuous and efficient heat exchange output and minimizing water loss due to sewage discharge. The integration of the water treatment device and the storage tank saves unit space. Furthermore, when the water treatment device needs regeneration or the storage tank is low, the valve switches the spray circuit to its second state. The spray return liquid from the spray circuit bypasses the storage tank for circulation, providing continuous spraying while the water treatment device performs regeneration or replenishes the storage tank. Therefore, while ensuring the reliable operation of the heat exchange unit, the treatment efficiency and quality of the water treatment device are guaranteed, thus ensuring the water quality of the circulating spray liquid during operation.

[0026] In addition, integrating the water treatment device into the heat exchange unit utilizes the space of the heat exchange unit, eliminating the need for a separate centralized water treatment device and supporting facilities in the machine room. The heat exchange unit can independently treat the circulating spray liquid, thus reducing the investment cost of the machine room. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the heat exchanger unit according to a specific embodiment of the present invention.

[0029] Figure label:

[0030] 1-Heat exchange core; 2-Spray circuit; 3-Water treatment device; 4-Evaporator; 5-Outdoor fan; 6-Indoor fan; 7-Condenser;

[0031] 22-Storage tank; 23-Valve; 24-Level detection device; 25-Filter; 26-Conductivity detection device; 27-Spraying device; 28-Spray liquid collection device; 29-Liquid pump;

[0032] 31-Water softener; 32-Brine tank; 33-Control valve; 34-Drain valve;

[0033] 221 - Drain valve;

[0034] 231 - First valve; 232 - Second valve;

[0035] 241 - First level switch; 242 - Second level switch; 243 - Third level switch; 244 - Fourth level switch;

[0036] 201-Bypass pipeline; 202-Return liquid pipeline; 203-Replenishment liquid pipeline; 204-Spray liquid pipeline; 205-Brine supply pipeline; 206-Water treatment device supply pipeline; 207-Water treatment device drain pipeline. Detailed Implementation

[0037] This utility model discloses a heat exchange unit for real-time treatment of circulating spray liquid, ensuring the water quality of the spray liquid, reducing the maintenance frequency of the heat exchange core structure, and ensuring the heat exchange efficiency of the heat exchange core.

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] The heat exchange unit provided in this application is applicable to, but not limited to, data center cooling. For ease of explanation, the example used is the heat exchange unit for cooling a data center server room. Please refer to... Figure 1The heat exchange unit includes a heat exchange core 1 and a spray circuit 2. The high-temperature indoor return air from the server room exchanges heat with outdoor air through the heat exchange core 1, then exchanges heat again through the evaporator 4 (when the compressor is running). After cooling, it is sent into the server room driven by the indoor fan 6 to cool the servers. Outdoor intake air is cooled by the spray liquid in the spray circuit 2 (when the spray circuit 2 is running), exchanges heat with the indoor return air through the heat exchange core 1, then exchanges heat with the condenser 7 (when the compressor is running), and finally is discharged to the outdoor environment driven by the outdoor fan 5.

[0040] The heat exchange unit has three operating modes. In winter, when the outdoor temperature is low, the unit operates in dry mode. At this time, spray circuit 2 and the compressor do not operate, and the cooling demand can be met by relying solely on the heat exchange core. During the transitional season, the unit operates in wet mode. At this time, spray circuit 2 operates, and the compressor does not operate. The cooling demand is met by increasing the heat exchange capacity of the heat exchange core through spraying. During the hot season, the unit operates in mixed mode. At this time, both spray circuit 2 and the compressor operate. The cooling demand is met by relying solely on the heat exchange core and the compressor.

[0041] In this application, a water treatment device 3 is integrated into the heat exchange unit so that the circulating spray liquid can be treated within the heat exchange unit. The following embodiments mainly describe the related structures and controls for circulating spray liquid treatment.

[0042] In some embodiments, the heat exchange unit includes a heat exchange core 1, a water treatment device 3, and a spray circuit 2. The spray circuit 2 sprays spray liquid onto the heat exchange core 1 to cool the outdoor air flowing through it. The spray liquid circulates within the spray circuit 2. For example, the spray circuit 2 includes a spray device 27, a spray liquid collection device 28, and a liquid pump 29. The liquid pump 29 pumps the spray return liquid collected by the spray liquid collection device 28 back to the spray device 27 to achieve spray liquid circulation. In this embodiment, the spray circuit 2 also includes a liquid storage tank 22 and a valve 23. The valve 23 switches the spray circuit 2 between a first state and a second state. The water treatment device 3 treats the spray return liquid. It is understood that the spray return liquid in this application refers to the spray liquid collected after being sprayed onto the heat exchange core 1. For example, the water treatment device 3 softens the spray return liquid. The storage tank 22 is used to store the spray liquid. Specifically, the spray return liquid flows into the storage tank 22, and the spray liquid in the storage tank 22 can then be sent to the heat exchange core 1 for spraying, thus achieving spray liquid circulation. The valve 23 is connected to the storage tank 22 and the water treatment device 3. The operation of the valve 23 can switch the spray circuit 2 between a first state and a second state, that is, the valve 23 can switch the flow path of the spray return liquid. Specifically, in the first state, the water treatment device 3 is connected to the spray circuit 2, and the spray return liquid in the spray circuit 2 does not directly enter the storage tank 22. Instead, it is treated by the water treatment device 3 before entering the storage tank 22 for circulation. That is, the return liquid collected after spraying onto the heat exchange core 1 is treated by the water treatment device 3 before entering the storage tank 22, and then transported back to the heat exchange core 1 for spraying, thus achieving circulation. In the second state, the inlet of the water treatment device 3 is connected to the replenishment port, and the spray return liquid in the spray circuit 2 is bypassed to the storage tank 22 for circulation. That is, the return liquid collected after being sprayed onto the heat exchange core 1 does not go through the treatment of the water treatment device 3, but directly enters the storage tank 22, and is then transported by the storage tank 22 back to the heat exchange core 1 for spraying, thus achieving circulation.

[0043] The heat exchanger unit provided by this invention integrates a water treatment device 3 into the heat exchanger unit. During operation of the spray circuit 2, valve 23 switches the spray circuit 2 to its first state. The spray return liquid from the spray circuit 2 is treated by the water treatment device 3 and then enters the storage tank 22 for circulation. This allows for real-time treatment of the circulating spray liquid, ensuring its quality and reducing maintenance frequency of the heat exchange core 1, thus guaranteeing its heat exchange efficiency and minimizing water loss due to sewage discharge. When the water treatment device 3 needs regeneration, or when the liquid level in the storage tank 22 is insufficient, valve 23 switches the spray circuit 2 to its second state. The spray return liquid from the spray circuit 2 bypasses the storage tank 22 for circulation, providing continuous spraying while the water treatment device 3 can perform regeneration or replenish the storage tank 22. Therefore, while ensuring the reliable operation of the heat exchange unit, the treatment efficiency and quality of the water treatment device 3 are guaranteed, thus ensuring the water quality of the circulating spray liquid during operation.

[0044] In addition, by integrating the water treatment device 3 into the heat exchange unit, the space of the heat exchange unit is utilized, eliminating the need for a separate centralized water treatment device 3 and supporting facilities in the machine room, thus reducing operating costs.

[0045] In some embodiments, the water treatment device 3 includes a water softener 31, a salt storage tank 32, and a control valve 33. The water softener 31 is connected to the spray circuit 2 via the control valve 33, and the salt storage tank 32 is connected to the water softener 31 via the control valve 33. The control valve 33 is used to control the water softener 31 to be connected to the salt storage tank 32 and disconnected from the storage tank 22 for regeneration of the water softener 31, or to control the salt storage tank 32 to be disconnected from the water softener 31 and connected to the storage tank 22 for softening of the water softener 31. For example, the water softener 31 employs resin separation softening technology, using sodium ion exchange to soften the water. That is, when the spray return liquid passes through the sodium ion exchange resin, the Ca in the spray return liquid... 2+ mg 2+ Na in sodium ion exchanger +The softener replaces the scale-forming calcium and magnesium compounds with non-scale-forming, easily soluble sodium compounds, thereby softening the spray return liquid. Specifically, the water softener 31 includes a resin tank with a water distributor to ensure the spray return liquid flows evenly across the resin layer. The control valve 33 can be a multi-way control valve, and the salt reservoir 32 is connected to the control valve 33 via a salt supply pipe 205. The water treatment device 3 specifically includes a controller connected to the multi-way control valve. By controlling the operation of the multi-way control valve, the water treatment device 3 performs backwashing, regeneration, displacement, and forward washing. For example, the water treatment device 3 uses a fully automatic sodium ion exchanger. For example, the water softener 31 is connected to a drain valve 34, such as a water treatment device drain pipe 207, which is equipped with a drain valve 34. During regeneration, the drain valve 34 is opened to discharge the regenerated liquid. During softening, the drain valve 34 is closed.

[0046] The water treatment device 3 is configured as described above. Valve 23 is used to switch the spray circuit 2 to the first state when the water softener 31 is performing softening treatment; and to switch the spray circuit 2 to the second state when the water softener 31 is performing regeneration treatment. For example, when the spray circuit 2 is in operation, i.e., when the unit needs to spray the heat exchange core 1, the spray circuit 2 operates. If the water softener 31 does not require regeneration treatment, valve 23 switches the spray circuit 2 to the first state, and the water softener 31 softens the spray return liquid. The treated spray return liquid enters the storage tank 22 and is then sprayed onto the heat exchange core 1. When the water softener 31 requires regeneration treatment, valve 23 switches the spray circuit 2 to the second state. Liquid from the replenishment port, such as tap water, enters the water softener 31 to perform regeneration treatment. At this time, the spray return liquid flows directly back to the storage tank 22 and is directly used for circulating spray liquid. After the regeneration treatment is completed, valve 23 switches the spray circuit 2 back to the first state. The above settings ensure the effectiveness and reliability of the water softener 31 in treating the spray liquid, avoid the decline in the quality of the spray return liquid caused by insufficient reaction between the exchange agent and the spray return liquid, and thus ensure that the circulating spray liquid can always maintain a better water quality.

[0047] In some embodiments, the water treatment device 3 further includes a sand filter and a carbon filter connected to the inlet of the water softener 31 to filter the return liquid from the spray or the incoming liquid from the replenishment pipe 203. The treated liquid then enters the water softener 31 for softening, further improving the water quality.

[0048] In some embodiments, a liquid level detection device 24 is provided in the liquid storage tank 22, and a valve 23 is used to switch the spray circuit 2 to a first state or a second state based on the liquid level detected by the liquid level detection device 24 in the liquid storage tank 22. In this embodiment, the liquid level in the liquid storage tank 22 is detected by the liquid level detection device 24, and the state of the spray circuit 2 is controlled accordingly. This ensures uninterrupted spraying of the heat exchange core 1 during the operation of the spray circuit 2, and avoids insufficient cooling of the outdoor air intake due to insufficient spray liquid.

[0049] Specifically, valve 23 is used to switch the spray circuit 2 to the second state when the liquid level in the storage tank 22 detected by the liquid level detection device 24 is not greater than the first preset liquid level, and to switch the spray circuit 2 to the first state when the liquid level in the storage tank 22 detected by the liquid level detection device 24 reaches the second preset liquid level. When the liquid level in the storage tank 22 is not greater than the first preset liquid level, it indicates that the spray liquid in the storage tank 22 is insufficient and needs to be replenished. When valve 23 switches the spray circuit 2 to the second state, the liquid from the replenishment port, such as tap water, enters the water softener 31 for softening treatment and is then supplied to the storage tank 22. At this time, the spray return liquid flows directly back into the storage tank 22 and is directly used for circulating spray liquid. When the liquid level in the storage tank 22 detected by the liquid level detection device 24 reaches the second preset liquid level, it indicates that the spray liquid in the storage tank 22 is sufficient. The valve 23 switches the spray circuit 2 to the first state, and the water treatment device 3 softens the spray return liquid. The treated spray return liquid enters the storage tank 22 and is then sprayed onto the heat exchange core 1. For example, the height of the second preset liquid level is above the first preset liquid level.

[0050] In some embodiments, the spray circuit 2 is activated when the liquid level in the storage tank 22, detected by the liquid level detection device 24, reaches a second preset liquid level. That is, when the spray circuit 2 needs to run, it first detects whether the liquid level in the storage tank 22 has reached the second preset liquid level. When it reaches the second preset liquid level, the spray circuit 2 operates to spray water onto the heat exchange core 1. When the liquid level in the storage tank 22 has not reached the second preset liquid level, the inlet of the water treatment device 3 is connected to the replenishment port to replenish the liquid.

[0051] In some embodiments, the liquid level detection device 24 employs a liquid level switch. For example, a first liquid level switch 241 is provided corresponding to a first preset liquid level, and a second liquid level switch 242 is provided corresponding to a second preset liquid level. When both the first liquid level switch 241 and the second liquid level switch 242 in the storage tank 22 are open, it indicates that the liquid level in the storage tank 22 is insufficient, and the valve 23 switches the spray circuit 2 to a second state to replenish the spray liquid. When both the first liquid level switch 241 and the second liquid level switch 242 in the storage tank 22 are closed, it indicates that the liquid level in the storage tank 22 is sufficient, and the valve 23 switches the spray circuit 2 to a first state.

[0052] In some embodiments, a third liquid level switch 243 is also provided in the liquid storage tank 22 at the third preset liquid level, and the height of the third preset liquid level is lower than the first preset liquid level. When the first liquid level switch 241, the second liquid level switch 242 and the third liquid level switch 243 in the liquid storage tank 22 are all closed, it indicates that the liquid volume in the liquid storage tank 22 is sufficient, and the valve 23 switches the spray circuit 2 to the first state.

[0053] In some embodiments, a fourth liquid level switch 244 is also provided in the liquid storage tank 22 at a fourth preset liquid level, and the height of the fourth preset liquid level is greater than the second preset liquid level. When the first liquid level switch 241, the second liquid level switch 242 and the fourth liquid level switch 244 in the liquid storage tank 22 are all off, it indicates that the liquid volume in the liquid storage tank 22 is insufficient, and the valve 23 switches the spray circuit 2 to the second state to replenish the spray liquid.

[0054] In some embodiments, a filter 25 is provided in the spray circuit 2 for filtering the spray liquid. By setting the filter 25 to filter the spray liquid, the water quality of the spray liquid is further improved, so as to better prevent scaling of the heat exchange core 1.

[0055] In some embodiments, the spray circuit 2 is further provided with a conductivity detection device 26 for detecting the conductivity of the spray liquid. By detecting the conductivity of the spray liquid through the conductivity detection device 26, the water quality of the spray liquid can be reflected, thereby facilitating relevant personnel or equipment to take appropriate measures when the conductivity of the spray liquid does not meet the requirements, so as to prevent unqualified spray liquid from being sprayed onto the heat exchange core 1, causing scaling on the heat exchange core 1, or reducing the heat exchange efficiency of the heat exchange core 1.

[0056] In some embodiments, the storage tank 22 is connected to a drain valve 221. The drain valve 221 allows the spray liquid in the storage tank 22 to be drained, and can drain the spray liquid if it does not meet the spraying requirements.

[0057] For example, the drain valve 221 is used to open when the conductivity detected by the conductivity detection device 26 is greater than a preset conductivity to drain the spray liquid, and to close when the liquid level in the storage tank 22 drops to a first preset liquid level. The conductivity of the spray liquid is detected by the conductivity detection device 26 to reflect the water quality of the spray liquid. When it is greater than the preset conductivity, it indicates that continued use of the spray liquid will no longer meet the spraying requirements, so the drain valve 221 opens to drain the spray liquid in the storage tank 22. And when the liquid level in the storage tank 22 drops to the first preset liquid level, the drain valve 221 closes to stop the draining. Specifically, the first preset liquid level is greater than zero, that is, the draining stops when the liquid level in the storage tank 22 drops to a first preset liquid level greater than zero. This allows most of the liquid in the storage tank 22 to be drained, while a certain amount of spray liquid is reserved in the storage tank 22 to ensure the circulation of the spray liquid, that is, continuous spraying to the heat exchange core 1.

[0058] Specifically, after the liquid level in the storage tank 22 drops to the first preset level, the drain valve 221 closes, and simultaneously, valve 23 switches the spray circuit 2 to the second state. Liquid from the replenishment pipe 203, such as tap water, enters the water softener 31 for softening treatment and then supplies liquid to the storage tank 22. At this time, the spray return liquid flows directly back into the storage tank 22 and is directly used for circulating spray liquid. When the liquid level in the storage tank 22, detected by the level detection device 24, reaches the second preset level, it indicates that the spray liquid in the storage tank 22 is sufficient, and valve 23 switches the spray circuit 2 to the first state. The liquid level in the storage tank 22 can be detected by the level detection device 24 in the above embodiment.

[0059] In some embodiments, the spray circuit 2 includes a spray device 27 and a spray liquid collection device 28. The spray liquid collection device 28 is located below the spray device 27 and is used to collect the spray liquid. The outlet of the spray liquid collection device 28 is connected to the inlet of the water treatment device 3 via the return liquid pipeline 202, and the outlet of the spray liquid collection device 28 is connected to the inlet of the storage tank 22 via the bypass pipeline 201. Through the cooperation of the spray device 27 and the spray liquid collection device 28, the spray device 27 can uniformly spray the spray liquid onto the heat exchange core 1, and the spray liquid collection device 28 can collect the sprayed return liquid, which can then enter the storage tank 22 via the bypass pipeline 201 or the return liquid pipeline 202 for recycling. It is understood that the return liquid pipeline 202 and the bypass pipeline 201 can be connected to the same inlet of the storage tank 22 or to different inlets of the storage tank 22. For example, the liquid storage tank 22 is connected to the spray liquid collection device 28 through the spray liquid pipe 204204, and the spray liquid collection device 28 is specifically a liquid receiving tray.

[0060] Furthermore, valve 23 includes a first valve 231 located in the return pipeline 202 and a second valve 232 located in the bypass pipeline 201. The first valve 231 is connected to a replenishment pipeline 203. The inlet of the first valve 231 can optionally be connected to either the outlet of the spray liquid collection device 28 or the inlet of the replenishment pipeline 203. The outlet of the first valve 231 is connected to the inlet of the water treatment device 3. The inlet of the second valve 232 is connected to the outlet of the spray liquid collection device 28, and the outlet of the second valve 232 is connected to the inlet of the storage tank 22. In the first state, the inlet of the first valve 231 is connected to the outlet of the spray liquid collection device 28, and the second valve 232 is closed. In the second state, the inlet of the first valve 231 is connected to the outlet of the replenishment pipeline 203, and the second valve 232 is open. Specifically, the first valve 231 is used to switch the connection between the inlet of the water treatment device 3 and the outlet of the spray liquid collection device 28, or to connect it with the replenishment pipe 203; the second valve 232 is used to disconnect the outlet of the spray liquid collection device 28 from the inlet of the storage tank 22 or to connect the two. By cooperating with the first valve 231 and the second valve 232, the switching between the first state and the second state can be realized. The structure is simple and easy to control.

[0061] For example, the second valve 232 is a two-way valve, with its two ports connected to the outlet of the spray liquid collection device 28 and the inlet of the storage tank 22, respectively. When the second valve 232 is open, the outlet of the spray liquid collection device 28 is disconnected from the inlet of the storage tank 22; when the second valve 232 is open, the outlet of the spray liquid collection device 28 is connected to the inlet of the storage tank 22, that is, the outlet of the spray liquid collection device 28 is connected to the inlet of the storage tank 22 through the bypass pipe 201.

[0062] In some embodiments, the first valve 231 is a three-way valve, and its three ports are respectively connected to the outlet of the spray liquid collection device 28, the replenishment pipe 203, and the inlet of the water treatment device 3. The first valve 231 can switch between a first position and a second position. When it is in the first position, the inlet of the water treatment device 3 is connected to the outlet of the spray liquid collection device 28; when it is in the second position, the inlet of the water treatment device 3 is connected to the replenishment pipe 203. The three-way valve has a simple structure and is easy to connect and control.

[0063] In other embodiments, the first valve 231 includes two two-way valves, one of which is connected between the outlet of the spray liquid collection device 28 and the inlet of the water treatment device 3, and the other is connected between the replenishment pipe 203 and the inlet of the water treatment device 3. By cooperating with the two two-way valves, it is also possible to switch between connecting the inlet of the water treatment device 3 to the outlet of the spray liquid collection device 28 or to the replenishment pipe 203.

[0064] In some other embodiments, the inlet of the water treatment device 3 may be connected to the outlet of the spray liquid collection device 28 via the return liquid pipeline 202 and connected to the replenishment liquid pipeline 203. The first valve 231 may also include two-way valves respectively provided in the return liquid pipeline 202 and the replenishment liquid pipeline 203.

[0065] For example, the first valve 231, the second valve 232, and other valves 23 mentioned in this application can all be solenoid valves to facilitate automatic control via a control device. In other embodiments, each valve can also be a manually controlled valve for manual control.

[0066] In some embodiments, a liquid pump 29 is connected between the storage tank 22 and the spray device 27 to pump the spray liquid from the storage tank 22 to the spray device 27. If a conductivity detection device 26 is provided in the spray circuit 2, the conductivity detection device 26 can be connected between the liquid pump 29 and the spray device 27. If a filter 25 is provided in the spray circuit 2, the filter 25 can be connected between the liquid pump 29 and the conductivity detection device 26. Additionally, a one-way valve can be provided between the liquid pump 29 and the spray device 27 to ensure unidirectional circulation of the spray liquid.

[0067] The control method for the heat exchange unit provided in the above embodiments includes:

[0068] During the operation of the spray circuit 2, when the water treatment device 3 needs to be regenerated, the spray circuit 2 is switched to the second state so that the spray return liquid of the spray circuit 2 is bypassed to the storage tank 22 for circulation until the water treatment device 3 is regenerated and the spray circuit 2 is switched to the first state.

[0069] When the heat exchanger unit needs to spray the heat exchange core 1, specifically when the liquid pump 29 needs to be turned on, the liquid pump 29 starts the spray circuit 2, and the valve 23 switches the spray circuit 2 to the first state. The spray return liquid, after being treated by the water treatment device 3, enters the storage tank 22, and then flows back into the spray device 27 to spray the heat exchange core 1 through the action of the liquid pump 29. During operation, when the water treatment device 3 needs to be regenerated, the valve 23 switches the spray circuit 2 to the second state to allow the water treatment device 3 to perform regeneration. After the regeneration is completed, the valve 23 switches the spray circuit 2 back to the first state to continue treating the spray return liquid before it is transported to the storage tank 22.

[0070] This heat exchanger unit can treat the circulating spray liquid in real time, ensuring the water quality of the spray liquid, thereby reducing the maintenance frequency of the heat exchange core 1 structure, ensuring the heat exchange efficiency of the heat exchange core 1, and reducing water resource loss due to sewage discharge. Furthermore, when the water treatment device 3 needs regeneration, valve 23 switches the spray circuit 2 to a second state, and the spray return liquid of the spray circuit 2 is bypassed to the storage tank 22 for circulation, providing continuous spraying while the water treatment device 3 can perform regeneration. Therefore, while the heat exchanger unit can operate reliably, the treatment efficiency and quality of the water treatment device 3 are guaranteed, thus ensuring the water quality of the circulating spray liquid throughout the operation.

[0071] In addition, by integrating the water treatment device 3 into the heat exchange unit, the space of the heat exchange unit is utilized, eliminating the need for a separate centralized water treatment device 3 and supporting facilities in the machine room, thus reducing operating costs.

[0072] In some embodiments, the control method further includes: before the spray circuit 2 operates, valve 23 connects the inlet of the water treatment device 3 to the replenishment port until the liquid level in the storage tank 22 reaches a second preset liquid level, at which point valve 23 switches the spray circuit 2 to the first state. That is, before the spray circuit 2 operates, liquid is replenished to the storage tank 22 in advance, and when the liquid level in the storage tank 22 reaches the second preset liquid level, valve 23 switches the spray circuit 2 to the first state. For example, when the liquid pump 29 of the heat exchanger unit needs to be turned on, valve 23 controls the replenishment pipe 203 to connect to the inlet of the water treatment device 3, and disconnects the outlet of the spray liquid collection device 28 from the storage tank 22, allowing tap water or the like to directly enter the water treatment device 3 for softening treatment, and then enter the storage tank 22. When the liquid level in the storage tank 22 reaches the second preset liquid level, it indicates that the liquid level meets the conditions for turning on the liquid pump 29, and the liquid pump 29 starts.

[0073] In some embodiments, the control method for the heat exchange unit further includes:

[0074] When the liquid level in the storage tank 22 drops to the first preset liquid level, the spray circuit 2 is switched to the second state so that the spray return liquid of the spray circuit 2 is bypassed to the storage tank 22 for circulation until the liquid level in the storage tank 22 rises to the second preset liquid level, and the spray circuit 2 is switched to the first state.

[0075] During the operation of the heat exchanger unit, when the liquid level in the storage tank 22 is insufficient (i.e., the liquid level drops to the first preset level), valve 23 switches the spray circuit 2 to the second state, and the storage tank 22 is replenished. When the liquid level in the storage tank 22 is sufficient (i.e., the liquid level rises to the second preset level), valve 23 switches the spray circuit 2 to the first state. For example, the liquid level in the storage tank 22 can be detected by the liquid level detection device 24 in the above embodiment.

[0076] In some embodiments, the control method for the heat exchange unit further includes:

[0077] When the conductivity of the spray liquid is greater than the preset conductivity, the liquid storage tank 22 is controlled to drain until the liquid level in the liquid storage tank 22 drops to the first preset liquid level, at which point the draining stops.

[0078] After the liquid level in the storage tank 22 drops to the first preset level, valve 23 switches the spray circuit 2 to the second state, and the spray return liquid of the spray circuit 2 is bypassed to the storage tank 22 for circulation until the liquid level in the storage tank 22 rises to the second preset level, at which point valve 23 switches the spray circuit 2 back to the first state. When the conductivity of the spray liquid is greater than the preset conductivity, the spray liquid in the storage tank is discharged and replenished, further improving the water quality of the spray liquid. For example, the conductivity of the spray liquid can be detected by the conductivity detection device 26 in the above embodiment.

[0079] The following description uses a preferred embodiment.

[0080] In this embodiment, the spray circuit 2 is equipped with a spray device 27, a spray liquid collection device 28, a water treatment device 3, a liquid storage tank 22, a liquid pump 29, and a conductivity detection device 26. The liquid storage tank 22 is equipped with a liquid level detection device 24. The valve 23 includes a first valve 231 located in the return liquid pipeline 202 and a second valve 232 located in the bypass pipeline 201. The first valve 231 is connected to a replenishment pipe 203.

[0081] When the liquid pump 29 needs to be turned on, the first valve 231 controls the replenishment pipe 203 to connect with the inlet of the water treatment device 3, and the second valve 232 is closed. Tap water or other water is directly used to enter the water treatment device 3 for softening treatment. Then, the water enters the storage tank 22 through the water treatment device supply pipe 206. When the first liquid level switch 241 and the second liquid level switch 242 in the storage tank 22 are both closed, it means that the liquid level meets the conditions for turning on the liquid pump 29, and the liquid pump 29 starts.

[0082] When the unit's liquid pump 29 is running, if the water treatment device 3 has no need for regeneration, the first valve 231 switches to connect the outlet of the spray liquid collection device 28 and the inlet of the water treatment device 3 through the return liquid pipeline 202, and the second valve 232 closes. The spray return liquid first enters the water treatment device 3 for water treatment, and then is transported to the storage tank 22, and then supplied to the spray device 27 through the liquid pump 29.

[0083] If the water treatment device 3 requires regeneration, the first valve 231 switches to connect the replenishment pipe 203 to the inlet of the water treatment device 3, allowing direct use of tap water or similar water for regeneration. At this time, the second valve 232 opens, and the spray return liquid flows directly back to the storage tank 22 for reuse. After the water treatment device 3 completes regeneration, the first valve 231 switches to connect the outlet of the spray liquid collection device 28 to the inlet of the water treatment device 3 via the return pipe 202. The second valve 232 closes, and the spray return liquid undergoes water treatment before being transported to the storage tank 22. The liquid pump 29 then supplies the liquid to the spray device 27.

[0084] If both the first level switch 241 and the second level switch 242 in the storage tank 22 are open, it indicates that the liquid volume in the storage tank 22 is insufficient. The first valve 231 switches to connect the replenishment pipe 203 to the inlet of the water treatment device 3, and the second valve 232 opens, allowing tap water or similar water to directly enter the water treatment device 3 for softening treatment. The softened water then enters the storage tank 22 through the water treatment device supply pipe 206. When both the first level switch 241 and the second level switch 242 are closed, it indicates that the liquid volume is sufficient. The first valve 231 switches to connect the outlet of the spray liquid collection device 28 to the inlet of the water treatment device 3 through the return liquid pipe 202, and the second valve 232 closes. The spray return liquid is then treated and transported back to the storage tank 22, and the liquid pump 29 supplies it to the spray device 27.

[0085] If the conductivity detected by the conductivity detection device 26 is greater than the preset conductivity, the drain valve 221 opens until the first liquid level switch 241 is opened, at which point the drain valve 221 closes. At this time, the first valve 231 switches to connect the replenishment pipe 203 to the inlet of the water treatment device 3, and the second valve 232 opens, allowing tap water or other water to directly enter the water treatment device 3 for softening treatment. The softened water then enters the storage tank 22 through the water treatment device supply pipe 206 until the second liquid level switch 242 closes. The first valve 231 then switches to connect the outlet of the spray liquid collection device 28 to the inlet of the water treatment device 3 through the return liquid pipe 202, and the second valve 232 closes. The returned spray liquid is then treated and transported back to the storage tank 22, and the liquid pump 29 supplies it to the spray device 27.

[0086] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0087] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat exchange unit, characterized in that, include: Heat exchange core (1); Water treatment device (3); The spray circuit (2) is filled with spray liquid and is used to spray the spray liquid onto the heat exchange core (1). The spray circuit (2) is provided with a liquid storage tank (22) and a valve (23). The valve (23) is used to switch the spray circuit (2) between a first state and a second state. In the first state, the water treatment device (3) is connected to the spray circuit (2), and the spray return liquid is processed by the water treatment device (3) and then enters the storage tank (22) for circulation. The spray return liquid includes the spray liquid collected after being sprayed onto the heat exchange core (1). In the second state, the inlet of the water treatment device (3) is connected to the replenishment port, and the spray return liquid in the spray circuit (2) is bypassed to the storage tank (22) for circulation.

2. The heat exchange unit according to claim 1, characterized in that, The water treatment device (3) includes a water softener (31), a salt storage tank (32), and a control valve (33). The water softener (31) is connected to the spray circuit (2) through the control valve (33). The salt storage tank (32) is connected to the water softener (31) through the control valve (33). The control valve (33) is used to control the water softener (31) to communicate with the salt storage tank (32) and disconnect it from the liquid storage tank (22) to perform the regeneration treatment of the water softener (31), or to control the salt storage tank (32) to disconnect it from the water softener (31) and communicate it with the liquid storage tank (22) to perform the softening treatment of the water softener (31). The valve (23) is used to switch the spray circuit (2) to the first state when the water softener (31) is performing softening treatment, and to switch the spray circuit (2) to the second state when the water softener (31) is performing regeneration treatment.

3. The heat exchange unit according to claim 1, characterized in that, The liquid storage tank (22) is equipped with a liquid level detection device (24). The valve (23) is also used to switch the spray circuit (2) to the second state when the liquid level in the liquid storage tank (22) detected by the liquid level detection device (24) is not greater than the first preset liquid level, and to switch the spray circuit (2) to the first state when the liquid level in the liquid storage tank (22) detected by the liquid level detection device (24) reaches the second preset liquid level.

4. The heat exchange unit according to claim 1, characterized in that, The spray circuit (2) is equipped with a filter (25) for filtering the spray liquid.

5. The heat exchange unit according to any one of claims 1-4, characterized in that, The spray circuit (2) is also equipped with a conductivity detection device (26) for detecting the conductivity of the spray liquid.

6. The heat exchanger unit according to claim 5, characterized in that, The storage tank (22) is connected to a drain valve (221), which is used to open when the conductivity detected by the conductivity detection device (26) is greater than a preset conductivity to discharge the spray liquid, and to close when the liquid level in the storage tank (22) drops to a first preset liquid level.

7. The heat exchange unit according to any one of claims 1-4, characterized in that, The spray circuit (2) includes a spray device (27) and a spray liquid collection device (28). The spray liquid collection device (28) is located below the spray device (27) and is used to collect the spray liquid. The outlet of the spray liquid collection device (28) is connected to the inlet of the water treatment device (3) through a return liquid pipeline (202) and to the inlet of the storage tank (22) through a bypass pipeline (201).

8. The heat exchanger unit according to claim 7, characterized in that, The valve (23) includes a first valve (231) located in the return pipeline (202) and a second valve (232) located in the bypass pipeline (201). The first valve (231) is connected to a replenishment pipeline (203). The inlet of the first valve (231) is optionally connected to one of the outlet of the spray liquid collection device (28) and the outlet of the replenishment pipe (203), and the outlet of the first valve (231) is connected to the inlet of the water treatment device (3); the inlet of the second valve (232) is connected to the outlet of the spray liquid collection device (28), and the outlet of the second valve (232) is connected to the inlet of the storage tank (22); In the first state, the inlet of the first valve (231) is connected to the outlet of the spray liquid collection device (28), and the second valve (232) is closed; In the second state, the inlet of the first valve (231) is connected to the outlet of the replenishment pipe (203), and the second valve (232) is opened.

9. The heat exchanger unit according to claim 8, characterized in that, The first valve (231) is a three-way valve, and the three ports of the three-way valve are respectively connected to the outlet of the spray liquid collection device (28), the replenishment pipe (203) and the inlet of the water treatment device (3).

10. The heat exchange unit according to claim 8, characterized in that, The first valve (231) includes two two-way valves, one of which is connected between the outlet of the spray liquid collection device (28) and the inlet of the water treatment device (3), and the other is connected between the replenishment pipe (203) and the inlet of the water treatment device (3).

Images