Single-cold-source independent temperature and humidity control system

Abstract

The single-cold-source temperature and humidity independent control system comprises first heat exchange equipment, second heat exchange equipment, a first adjusting valve and a second adjusting valve, wherein the first heat exchange equipment and the second heat exchange equipment are sequentially arranged in the flow direction of an air duct; cold source water supply sequentially communicates through the first adjusting valve, the supercharging device, the second adjusting valve, the first heat exchange device and the second heat exchange device, and cold source return water is output. The second regulating valve is further provided with a B3 outlet communicated with an inlet of the second heat exchange equipment, and the B3 outlet is used for keeping the flow of the cold source conveyed from the B2 outlet to the first heat exchange equipment unchanged after pressurization of the pressurization equipment; the first adjusting valve is further provided with an A3 inlet communicated with part of cold source return water, and the A3 inlet is used for adjusting the flow proportion of the A1 inlet and the A3 inlet in the A2 outlet. The cooling and dehumidification effects of the first heat exchange equipment are only influenced by the input flow temperature, the input flow of the second heat exchange equipment is changed by the pressure change of the supercharging equipment, and decoupling control of cooling and dehumidification through a single cold source is integrally achieved.

Description

Technical Field

[0001] The present application relates to the technical field of air temperature and humidity regulation, and in particular to a single-cold-source independent temperature and humidity control system. Background Art

[0002] In places with high temperature and humidity requirements, precise temperature control is not only necessary, but also humidity control. Conventional temperature and humidity control often reduces both air temperature and humidity to below target values, and then achieves temperature and humidity control through humidification and heating. However, this increases reheating and humidification energy consumption, which is not conducive to energy conservation.

[0003] Dual-cooling source independent temperature and humidity control is a common independent temperature and humidity control system, in which the low-temperature cooling source is used for dehumidification and the high-temperature cooling source is used for temperature control. However, this requires the provision of two temperature cooling sources, which increases the complexity and cost of the system. Also, because of the need to set up dual cooling sources, many projects cannot be well implemented. Utility Model Content

[0004] Based on this, it is necessary to provide a single cooling source temperature and humidity independent control system to address the above technical problems.

[0005] The present application discloses a single-cold-source independent temperature and humidity control system, comprising a first heat exchange device and a second heat exchange device sequentially arranged along the air duct flow direction, a first regulating valve having an A1 inlet and an A2 outlet, and a second regulating valve having a B1 inlet and a B2 outlet;

[0006] The cold source water supply is connected in sequence through the first regulating valve, the boosting device, the second regulating valve, the first heat exchange device, and the second heat exchange device to output the cold source return water;

[0007] The second regulating valve further has a B3 outlet connected to the inlet of the second heat exchange device, and the B3 outlet is used to maintain the cold source flow rate delivered from the B2 outlet to the first heat exchange device unchanged after the boosting device is boosted;

[0008] The first regulating valve further has an A3 inlet connected to a portion of the return water from the cold source, and the A3 inlet is used to adjust the flow ratio of the A1 inlet and the A3 inlet in the A2 outlet.

[0009] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution. They are merely further supplements or optimizations. Under the premise that there are no technical or logical contradictions, each optional method can be combined separately for the above-mentioned overall solution, or multiple optional methods can be combined.

[0010] Optionally, a third regulating valve having a C1 inlet and a C2 outlet is included;

[0011] The outlet of the first heat exchange device is connected to the inlet of the second heat exchange device via the C1 inlet and the C2 outlet in sequence;

[0012] The B3 outlet is connected to the inlet of the second heat exchange device via the C1 inlet and the C2 outlet in sequence.

[0013] Optionally, the third regulating valve further includes a C3 inlet, which is used to input part of the cold source return water to adjust the flow ratio of the C1 inlet and the C3 inlet to keep the temperature of the second heat exchange device higher than the dew point temperature.

[0014] Optionally, the third regulating valve further includes a C4 outlet, and the C4 outlet is used to discharge the flow of the C1 inlet to assist in adjusting the flow ratio of the C1 inlet and the C3 inlet.

[0015] Optionally, the air duct includes an air inlet section, an air mixing section, and an air outlet section, a first placement area is provided between the air inlet section and the air mixing section, and a second placement area is provided between the air mixing section and the air outlet section;

[0016] The first placement area is provided with the first heat exchange device for adjusting the temperature and humidity of the air in the air inlet section, and an air regulating valve for directly passing the air in the air inlet section into the air mixing section;

[0017] The second placement area is provided with the second heat exchange device.

[0018] Optionally, the air mixing section is provided with a first temperature detector, and the air outlet section is provided with a second temperature detector.

[0019] Optionally, the air mixing section is provided with a first humidity detector, and the air outlet section is provided with a second humidity detector.

[0020] Optionally, the boosting device is a water pump.

[0021] Optionally, the first heat exchange device and the second heat exchange device are both surface coolers.

[0022] This application for a single cooling source temperature and humidity independent control system has at least the following technical effects:

[0023] This application maintains the cold source flow rate delivered to the first heat exchanger from outlet B2 unchanged through outlet B3, ensuring that the cooling and dehumidifying effect of the first heat exchanger is affected only by the temperature of its input flow rate. Furthermore, changes in the pressure of the booster device alter the input flow rate of the second heat exchanger, thereby adjusting the cooling capacity of the second heat exchanger.

[0024] The present application adjusts the flow ratio of the A1 inlet and the A3 inlet through the A3 inlet, changes the input flow temperature of the first heat exchange device, and thus changes the cooling and dehumidification effect of the first heat exchange device.

[0025] The present application provides a technical solution for independently controlling and regulating temperature and humidity using a single cold source, thereby achieving overall decoupling control of cooling and dehumidification through a single cold source, reducing reheating and rehumidification conditions, and making the entire system more energy-efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a system diagram of a single cooling source independent temperature and humidity control system according to an embodiment of the present application;

[0027] Figure 2 This is a system diagram of a single cooling source independent temperature and humidity control system according to an embodiment of the present application;

[0028] Figure 3 This is a system diagram of a single cooling source independent temperature and humidity control system according to an embodiment of the present application.

[0029] Figure 4 This is a system diagram of a single cooling source independent temperature and humidity control system according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be an intermediate component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be an intermediate component.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] In this application, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number or order of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In this application, the terms "comprises" and "comprising" and any variations thereof are intended to cover non-exclusive inclusions, for example, a system, product or apparatus comprising a list of elements is not necessarily limited to those elements expressly listed but may include other elements not expressly listed or inherent to such products or apparatuses.

[0035] See also Figure 1 One embodiment of the present application provides a single cold source temperature and humidity independent control system, comprising a first heat exchange device and a second heat exchange device sequentially arranged along the air duct flow direction, as well as a first regulating valve MV1 having an A1 inlet and an A2 outlet, and a second regulating valve MV2 having a B1 inlet and a B2 outlet. The cold source water supply is sequentially connected through the first regulating valve MV1, the boosting device P, the second regulating valve MV2, the first heat exchange device, and the second heat exchange device, and the cold source return water (return water 1) is output. For example, the first heat exchange device and the second heat exchange device both use surface coolers. The cold source water supply first flows through the first heat exchange device and then flows through the second heat exchange device. The first heat exchange device is a low-temperature surface cooler, and the second heat exchange device is a high-temperature surface cooler. The boosting device P can use a water pump.

[0036] On this basis, the second regulating valve MV2 also has a B3 outlet connected to the inlet of the second heat exchange device. The B3 outlet is used to keep the cold source flow M3 delivered from the B2 outlet to the first heat exchange device unchanged after the boosting device P is boosted.

[0037] "M" in each embodiment of the present application represents the flow relationship between the various components in the system of this embodiment, which can be specifically understood as the temperature of the flow at different positions. The cold source water supply passes through the first heat exchange device and the second heat exchange device in turn, so that the first heat exchange device can assume the dehumidification capacity. The second regulating valve MV2 is a three-way regulating valve. Through the setting of the B3 outlet, it ensures that no matter how the boost device P changes, the flow M3 input to the first heat exchange device is constant (that is, the rated flow of the first heat exchange device). The flow M5 = M2 = M3 + M4, M2 represents the input flow of the B1 inlet, M3 represents the output flow of the B2 outlet, M4 represents the output flow of the B3 outlet, and M5 represents the mixed flow of M3 and M4. When the boost device P is working in variable frequency, the flow of the second heat exchange device is adjusted, and the flow M5 is equal to the flow M2.

[0038] If the booster device P increases the pressure, flow rate M2 increases. Since flow rate M3 remains constant, flow rates M4 and M5 also increase. This configuration maintains a constant input flow rate to the first heat exchanger. Its dehumidification capacity is controlled solely by the inlet water temperature M3 and is unaffected by changes in the water pump. Flow rate M6 within the second heat exchanger is controlled by the booster device, and the second heat exchanger outputs cold source return water 1 (M61).

[0039] The first regulating valve MV1 also has an A3 inlet that connects to a portion of the return water from the cold source. A3 inlet is used to adjust the flow ratio between the A1 and A3 inlets at the A2 outlet. The first regulating valve MV1 is a three-way regulating valve. By adjusting the flow ratio between the A1 and A3 inlets at the A2 outlet, namely, by adjusting the return water flow M62, the ratio of the cold source supply water flow M1 to the return water flow M62 is changed, thereby changing the temperature of the mixed flow M2 after passing through the first regulating valve MV1, and the temperature of the input flow (flow M3) of the first heat exchange device is changed accordingly. Ultimately, by adjusting the return water ratio M62, the temperature of the first heat exchange device's inlet water flow M3 is adjusted. The lower M3 is, the greater the dehumidification capacity of the first heat exchange device is, thus achieving the purpose of adjusting the dehumidification capacity by adjusting MV1.

[0040] This embodiment uses adaptive settings, such as adjusting the surface temperature of the second heat exchanger to above the dew point using a booster, to disable dehumidification and instead use it solely for temperature control. If the outlet air temperature is higher than the desired temperature, the water pump flow rate is increased to enhance the heat exchange capacity of the second heat exchanger. If the outlet air temperature is lower than the desired temperature, the water pump flow rate is reduced until it reaches the rated flow rate of the first heat exchanger, thereby reducing the flow rate entering the second heat exchanger and its heat exchange capacity.

[0041] Because the first and second heat exchangers are arranged sequentially, the return water ratio of M62 can be adjusted during use to enable the first heat exchanger to have both dehumidification and cooling capabilities. If the humidity measured at the outlet is higher than expected, MV1 is adjusted, the return water ratio of M62 is reduced, the temperature of M3 is lowered, and the dehumidification capacity of the first heat exchanger is increased. After primary cooling by the first heat exchanger, the air enters the second heat exchanger for secondary cooling, providing auxiliary temperature regulation. This embodiment, through the decoupled and independent control of temperature and humidity of a single cooling source, reduces reheating and rehumidification, thereby making the entire system more energy-efficient.

[0042] See also Figure 1 and Figure 2In some embodiments, the air duct of a single-cold-source independent temperature and humidity control system includes an air inlet section, an air mixing section, and an air outlet section. A first placement area is provided between the air inlet and air mixing sections, and a second placement area is provided between the air mixing and air outlet sections. The first placement area is equipped with a first heat exchange device for adjusting the temperature and humidity of the air in the air inlet section, as well as a regulating valve for directly passing air from the air inlet section into the air mixing section. The second placement area is equipped with a second heat exchange device. The air mixing section is equipped with a first temperature detector T1 and a first humidity detector D1, and the air outlet section is equipped with a second temperature detector T2 and a second humidity detector D2.

[0043] In this embodiment, part of the incoming air from the air inlet section passes through the first heat exchange device, and part flows into the mixed air section through a regulating air valve. The regulating air valve, for example, is an electric valve that controls the air volume flowing into the mixed air section. Specifically, the opening of the electric valve can be controlled based on the mixed air temperature T1 and humidity D1. Increasing the opening of the electric valve increases the proportion of direct air in the mixed air section, thereby increasing the temperature and humidity of the mixed air. When the mixed air temperature and humidity are lower than expected, the electric valve opening is increased to ensure that the mixed air temperature is higher than the outlet air temperature, eliminating the need for reheating by the second heat exchange device.

[0044] See also Figure 1 and Figure 3 In some embodiments, the single-cold-source independent temperature and humidity control system includes a third regulating valve MV3 having a C1 inlet and a C2 outlet. The outlet of the first heat exchange device is connected to the inlet of the second heat exchange device via the C1 inlet and the C2 outlet, respectively. The B3 outlet is connected to the inlet of the second heat exchange device via the C1 inlet and the C2 outlet, respectively. The third regulating valve MV3 also includes a C3 inlet, which is used to input a portion of the cold-source return water (M63) to adjust the flow ratio between the C1 inlet and the C3 inlet, maintaining the temperature of the second heat exchange device above the dew point temperature.

[0045] In this embodiment, the third regulating valve MV3, which serves as a multi-way valve, can change the return water volume M63 and adjust the flow temperature in the second heat exchange device by adjusting the return water of the cold source input at the inlet C3, thereby ensuring that the temperature of the direct water inlet flow M6 of the second heat exchange device (a mixture of the flow M5 and the return water volume M63) is higher than the dew point temperature, thereby eliminating the dehumidification capacity of the second heat exchange device and making it only perform temperature control.

[0046] Furthermore, the third regulating valve MV3 also includes a C4 outlet, which is used to discharge the flow of the C1 inlet to assist in adjusting the flow ratio of the C1 inlet and the C3 inlet. The third regulating valve MV3 is a four-way valve. When the boosting device P is reduced to the minimum flow (the rated flow of the first heat exchange device), if the measured temperature of the second temperature detector T2 is still lower than the expected temperature, the C4 outlet (water outlet valve) of the four-way valve is opened to bypass the excess flow M5 and output the return water 2, thereby reducing the mixing ratio of the flow M5 and the flow M63 in the flow M6, increasing the temperature of the flow M6 of the second heat exchange device, and reducing the cooling effect of the second heat exchange device.

[0047] See also Figure 3 and Figure 4 In the figure, the mark T* represents the fluid temperature at different locations, and the same mark indicates the same fluid temperature. The input and output flow temperatures of the first heat exchange device are T3 and T4 respectively; the input and output flow temperatures of the second heat exchange device are T6 and T2 respectively.

[0048] In summary, each embodiment of the present application achieves humidity control by controlling MV1 to adjust the temperature of the water inlet flow M3 of the first heat exchange device, and achieves auxiliary temperature control by adjusting the water pump flow to change the heat exchange capacity of the second heat exchange device; humidity and temperature control are achieved by adjusting the electric valve; and auxiliary temperature control is achieved by controlling MV3 to adjust the temperature of the water inlet flow M6 of the second heat exchange device. This ultimately achieves independent control of temperature and humidity. It should be noted that the various regulating valves in the present application can be single valves or assembled valve assemblies.

[0049] The technical features of the above-described embodiments may be combined in any manner. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as no contradiction exists between these combinations of technical features, they should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be deemed that the drawing also discloses examples of combinations of the various embodiments involved.

[0050] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present application, and such modifications and improvements are all within the scope of protection of the present application.

Claims

1. Single cooling source temperature and humidity independent control system, characterized by: It includes a first heat exchange device and a second heat exchange device arranged in sequence along the air duct flow direction, a first regulating valve with an A1 inlet and an A2 outlet, and a second regulating valve with a B1 inlet and a B2 outlet; The cold source water supply is connected in sequence through the first regulating valve, the boosting device, the second regulating valve, the first heat exchange device, and the second heat exchange device to output the cold source return water; The second regulating valve further has a B3 outlet connected to the inlet of the second heat exchange device, and the B3 outlet is used to maintain the cold source flow rate delivered from the B2 outlet to the first heat exchange device unchanged after the boosting device is boosted; The first regulating valve further has an A3 inlet connected to a portion of the return water from the cold source, and the A3 inlet is used to adjust the flow ratio of the A1 inlet and the A3 inlet in the A2 outlet.

2. The single cooling source independent temperature and humidity control system according to claim 1, characterized in that: including a third regulating valve having a C1 inlet and a C2 outlet; The outlet of the first heat exchange device is connected to the inlet of the second heat exchange device via the C1 inlet and the C2 outlet in sequence; The B3 outlet is connected to the inlet of the second heat exchange device via the C1 inlet and the C2 outlet in sequence.

3. The single cooling source independent temperature and humidity control system according to claim 2, characterized in that: The third regulating valve further includes a C3 inlet, which is used to input a portion of cold source return water to adjust the flow ratio of the C1 inlet and the C3 inlet, and maintain the temperature of the second heat exchange device higher than the dew point temperature.

4. The single cooling source independent temperature and humidity control system according to claim 3, characterized in that: The third regulating valve further includes a C4 outlet, which is used to discharge the flow of the C1 inlet to assist in adjusting the flow ratio between the C1 inlet and the C3 inlet.

5. The single cooling source independent temperature and humidity control system according to any one of claims 1 to 4, characterized in that: The air duct includes an air inlet section, an air mixing section, and an air outlet section. A first placement area is provided between the air inlet section and the air mixing section, and a second placement area is provided between the air mixing section and the air outlet section. The first placement area is provided with the first heat exchange device for adjusting the temperature and humidity of the air in the air inlet section, and an air regulating valve for directly passing the air in the air inlet section into the air mixing section; The second placement area is provided with the second heat exchange device.

6. The single cooling source independent temperature and humidity control system according to claim 5, characterized in that: The air mixing section is provided with a first temperature detector, and the air outlet section is provided with a second temperature detector.

7. The single cooling source independent temperature and humidity control system according to claim 5, characterized in that: The air mixing section is provided with a first humidity detector, and the air outlet section is provided with a second humidity detector.

8. The single cooling source independent temperature and humidity control system according to claim 1, characterized in that: The boosting device is a water pump.

9. The single cooling source independent temperature and humidity control system according to claim 1, characterized in that: The first heat exchange device and the second heat exchange device are both surface coolers.

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