Dehumidifying device, shell-and-tube heat exchanger and air conditioner

Abstract

The present invention discloses a dehumidifying device, a shell-and-tube heat exchanger and an air conditioner, comprising: a circulation pipeline communicating with the refrigerant area of the shell-and-tube heat exchanger of the unit, a circulation assembly arranged on the circulation pipeline to provide power for the refrigerant circulation, and a refrigeration and dehumidification module communicating with the circulation pipeline and installed in the storage space of the unit. By arranging the refrigeration and dehumidification module in the storage space of the assembly, and directly connecting the refrigeration and dehumidification module to the inside of the shell-and-tube evaporator of the unit through the circulation pipeline, the refrigeration and dehumidification module uses the refrigerant in the circulation pipeline for heat exchange, dehumidification and temperature reduction. Utilizing the redundant refrigerating capacity of the chiller to dehumidify and cool the installation room of the chiller, improving the hot and humid problem of the equipment storage space, increasing the service life of the equipment, and enhancing the refrigeration efficiency of the chiller.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to a dehumidification device, a shell-and-tube heat exchanger, and an air conditioner. Background Art

[0002] Chillers mainly provide chilled water for large buildings or large ships, and their installation locations are generally mainly in the basements of the building ground floors, engine rooms in the hulls, or chiller rooms, etc. And these locations have some common characteristics, that is, they are humid and hot or electrical components are relatively concentrated, which easily corrodes the electrical components of the equipment and affects the service life and operation stability of the equipment. Summary of the Invention

[0003] In order to solve the technical problem of the humid and hot environment in the installation and storage space of the unit in the above-mentioned prior art, the present invention provides a dehumidification device, a shell-and-tube heat exchanger, and an air conditioner.

[0004] The technical solution adopted by the present invention is as follows:

[0005] The present invention provides a dehumidification device, including: a circulation pipeline communicated with the shell-and-tube heat exchanger of the unit, a refrigeration and dehumidification module communicated with the circulation pipeline and installed in the unit storage space, and a circulation component arranged on the circulation pipeline to enable the refrigerant of the shell-and-tube heat exchanger to flow through the refrigeration and dehumidification module.

[0006] An opening is provided at the bottom of the shell-and-tube heat exchanger, and the refrigerant inlet end and the refrigerant outlet end of the circulation pipeline are inserted into the shell-and-tube heat exchanger from the opening. The refrigerant inlet end is located at the bottom of the shell-and-tube heat exchanger, and the refrigerant outlet end is located at the upper part of the shell-and-tube heat exchanger.

[0007] The refrigeration and dehumidification module includes: a dehumidification heat exchanger communicated with the circulation pipeline, a fan cooperating with the dehumidification heat exchanger, and the air outlet direction of the fan faces the condenser of the unit. A water collection or drainage component is provided below the dehumidification heat exchanger.

[0008] The present invention further includes: a pressure detection module for detecting the evaporation pressure of the refrigeration and dehumidification module; a first temperature sensor for detecting the refrigerant temperature at the outlet side of the refrigeration and dehumidification module; a throttling device arranged on the circulation pipeline to adjust the refrigerant flow rate; and a controller for obtaining the evaporation temperature corresponding to the evaporation pressure, calculating the superheat degree through the evaporation temperature and the refrigerant temperature, and controlling the throttling device to adjust the refrigerant flow rate of the circulation pipeline according to the magnitude of the superheat degree.

[0009] Preferably, after the unit is started for a preset time, the controller controls the refrigeration and dehumidification module and the circulation component to be started, and adjusts the throttling device to a second preset opening degree.

[0010] Further, the controller controls the refrigeration and dehumidification module and the circulation component to be switched on and off in a preset cycle. When the unit is turned off during the on cycle of the refrigeration and dehumidification module and the circulation component, the controller controls the refrigeration and dehumidification module and the circulation component to be turned off.

[0011] The controller determines whether the superheat degree is within a preset superheat range. If so, it controls the throttling device to maintain at a second preset opening degree.

[0012] The controller determines whether the superheat degree is less than or equal to the minimum value of the preset superheat range. If so, it controls the throttling device to be reduced to a first preset opening degree.

[0013] The controller determines whether the superheat degree is greater than the maximum value of the preset superheat range. If so, the controller turns off the circulation component and adjusts the throttling device to an opening degree of 0.

[0014] The controller determines whether the superheat degree is greater than a preset abnormal superheat degree. If so, the controller turns off the fan of the refrigeration and dehumidification module and the circulation component, and adjusts the throttling device to an opening degree of 0.

[0015] The present invention further includes: a second temperature sensor for detecting the ambient temperature of the environment where the refrigeration and dehumidification module is located; when the ambient temperature is less than a preset ambient temperature, the controller turns off the circulation component and adjusts the throttling device to an opening degree of 0; when the ambient temperature is greater than the preset ambient temperature, the controller turns on the circulation component and adjusts the throttling device to a second preset opening degree.

[0016] The present invention further provides a shell-and-tube heat exchanger, including the above-mentioned dehumidifying device.

[0017] The present invention further provides an air conditioner, including the above-mentioned shell-and-tube heat exchanger.

[0018] Compared with the prior art, the present invention sets a refrigeration and dehumidification module in the storage space of the component, and the refrigeration and dehumidification module is directly connected to the inside of the shell-and-tube evaporator of the unit through a circulation pipeline, so that the refrigeration and dehumidification module uses the refrigerant in the circulation pipeline for heat exchange, dehumidification and temperature reduction. Utilize the surplus refrigerating capacity of the chiller to dehumidify and cool the installation room of the chiller, improve the humid and hot problem of the equipment storage space, extend the service life of the equipment, and improve the refrigeration efficiency of the chiller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the embodiments of the present invention. Specific embodiments

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] The principle and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0023] As Figure 1 shown, the present invention provides a dehumidification device, which specifically includes: a circulation pipeline 2, a circulation component 3 and a refrigeration and dehumidification module. The refrigeration and dehumidification module mainly cooperates with a chiller. The purpose of this device is to synchronously dehumidify the cabin, engine room or building basement where the chiller is stored.

[0024] The refrigerant inlet end 21 and the refrigerant outlet end 22 of the circulation pipeline 2 are connected to the refrigerant circulation area (mainly a flooded evaporator) inside the shell-and-tube heat exchanger 6 of the chiller. Two openings are provided at the bottom of the shell-and-tube heat exchanger 6. The refrigerant inlet end 21 and the refrigerant outlet end 22 of the circulation pipeline 2 each correspond to an opening, and are inserted into the inside of the shell-and-tube heat exchanger 6 from the two openings (sealing treatment is performed at the openings), so that the refrigerant inside the shell-and-tube heat exchanger 6 can flow into the circulation pipeline 2. Among them, the refrigerant inlet end 21 is located at the bottom of the shell-and-tube heat exchanger 6, facilitating the low-temperature liquid refrigerant (refrigerant) accumulated at the bottom of the shell-and-tube heat exchanger 6 to enter the circulation pipeline. The refrigerant outlet end 22 is located in the gas-phase refrigerant area at the upper part of the shell-and-tube heat exchanger 6, and is used to send back the refrigerant after heat exchange in the refrigeration and dehumidification module. The circulation component 3 is arranged on the circulation pipeline 2, specifically a refrigerant pump, which provides power for the refrigerant circulation. The refrigeration and dehumidification module is connected to the circulation pipeline, and the refrigeration and dehumidification module dehumidifies and cools through the refrigerant in the circulation pipeline. Thus, the excess refrigeration capacity of the chiller can be utilized to dehumidify and cool the installation room of the chiller, improve the hot and humid problem of the equipment installation room, thereby increasing the service life of the equipment and improving the refrigeration efficiency of the chiller.

[0025] The refrigeration and dehumidification module specifically includes: a housing 1, a dehumidification heat exchanger 11, and a fan 12 that cooperates with the dehumidification heat exchanger. The dehumidification heat exchanger 11 and the fan 12 are installed inside the housing 1, and one side of the housing 1 is open as the air outlet surface. The dehumidification heat exchanger 11 can specifically be a finned heat exchanger, or it can also be other heat exchangers with dehumidification functions. A water collection or drainage component is provided below the dehumidification heat exchanger 11. Specifically, a drainage groove 13 can be provided at the bottom of the housing, and a drainage pipe is provided corresponding to the drainage groove to centrally discharge or reuse the condensed water. To improve the heat exchange efficiency, the air outlet direction of the fan can be aligned with the condensation shell tube, that is, blow air towards the condensation shell tube of the chiller, reduce the heat load of the condensation shell tube, and increase the subcooling degree of the refrigerant.

[0026] The present invention further includes: a pressure detection module, a first temperature sensor 51, a throttling device 4, and a controller. The pressure detection module is used to detect the evaporation pressure of the dehumidification heat exchanger; the first temperature sensor 51 is arranged on the circulation pipeline 2 and is used to detect the refrigerant temperature at the outlet of the refrigeration and dehumidification module; the controller can obtain the corresponding evaporation temperature according to the evaporation pressure, and then calculate the superheat degree f through the evaporation temperature d and the refrigerant temperature e, that is, superheat degree f = e - d. The controller can control the throttling device to adjust the refrigerant flow rate in the circulation pipeline according to the size of the superheat degree.

[0027] The specific control is as follows:

[0028] First, preset a superheat range, for example, g to h, and h > g. After the unit is started and the preset is completed, the controller controls the refrigeration and dehumidification module and the circulation component to start, and adjusts the throttling device to the second preset opening c.

[0029] The controller determines whether the superheat degree is less than or equal to the minimum value of the preset superheat range. If so, it controls the throttling device to decrease to the first preset opening. Substituting the above example values, specifically, when f ≤ g (g is the data determined by debugging), the opening value of the throttling device becomes "c-", that is, the first preset opening c-. At this time, the evaporation of the liquid in the dehumidification heat exchanger is small, or even there is no evaporation.

[0030] The controller determines whether the superheat degree is greater than the maximum value of the preset superheat range. If so, it controls the throttling device to increase to the third preset opening. Substituting the above example values, specifically, when f > h (h is the data determined by debugging), the opening value of the throttling device is adjusted to "c+", that is, the third preset opening c-. Because at this time, the evaporation of the liquid in the finned heat exchanger is relatively complete, and even the excessive superheat degree affects refrigeration and dehumidification.

[0031] The controller determines whether the superheat degree is within the preset superheat range. If so, it controls the throttling device to remain at the second preset opening. Substituting the above example values, when g < f < h, the operation is relatively stable at this time, and the opening of the throttling device remains unchanged.

[0032] To prevent equipment damage, when f > i (where i is a preset abnormal overheat value), it indicates that the heat exchange system is abnormal. At this time, the circulation component is closed, and the opening of the throttling device is adjusted to 0 to prevent equipment damage.

[0033] The present invention also includes a second temperature sensor for detecting the ambient temperature of the environment where the refrigeration and dehumidification module is located. Since the operating environment of the chiller is mostly in a high-temperature state in summer, but considering the comfort of the machine storage compartment, a logical feedback is performed based on the second temperature sensor at this time.

[0034] The controller controls the refrigeration and dehumidification module and the circulation component to cycle on and off according to a preset period. For example, when the refrigeration and dehumidification module starts and runs continuously for X minutes, the module enters the standby state, the refrigerant pump is closed, and the opening of the automatic throttling device of the system becomes 0. After an interval of Y minutes, the module starts running again.

[0035] And when the unit stops running within X minutes while the refrigeration and dehumidification module is running, the refrigeration and dehumidification module stops running synchronously, and the timing restarts when the unit is restarted.

[0036] When the temperature signal Z < U (the ambient temperature is lower than the preset ambient temperature) is detected by the second temperature sensor within X minutes while the refrigeration and dehumidification module is running, it enters the standby state, and the controller closes the circulation component. When the temperature rises and the temperature signal Z > V (the ambient temperature is higher than the preset ambient temperature), the controller turns on the circulation component and adjusts the throttling device to the second preset opening.

[0037] The present invention also provides a shell-and-tube heat exchanger, specifically a flooded evaporator, including the above-mentioned dehumidification device.

[0038] The present invention also provides an air conditioner, specifically a chiller, including the above-mentioned dehumidification device.

[0039] In specific applications, the refrigerant filling amount of the chiller is usually around a hundred kilograms, and the storage space of the water-cooled unit is generally from a few square meters to more than ten square meters. According to the conventional data of household air conditioner refrigerants, the refrigerant (refrigerant) used is about 1 kilogram. Therefore, the amount of refrigerant consumed by the refrigeration and dehumidification module only accounts for about one percent of the entire unit, which has a very small impact on the whole machine and effectively improves the heat exchange efficiency of the unit.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dehumidifying device, characterized in that, Comprising: A circulation pipeline connected to the shell-and-tube heat exchanger of the unit, a refrigeration and dehumidification module connected to the circulation pipeline and installed in the storage space of the unit, and a circulation component arranged on the circulation pipeline to make the refrigerant of the shell-and-tube heat exchanger flow through the refrigeration and dehumidification module; An opening is provided at the bottom of the shell-and-tube heat exchanger, and the refrigerant inlet end and the refrigerant outlet end of the circulation pipeline are inserted into the interior of the shell-and-tube heat exchanger from the opening; The refrigerant inlet end is located at the bottom of the shell-and-tube heat exchanger, facilitating the low-temperature liquid refrigerant accumulated at the bottom of the shell-and-tube heat exchanger to enter the circulation pipeline, and the refrigerant outlet end is located in the gas-gaseous refrigerant area at the upper part of the shell-and-tube heat exchanger; the circulation component is a refrigerant pump.

2. The dehumidifying device according to claim 1, characterized in that The refrigeration and dehumidification module includes: a dehumidification heat exchanger connected to the circulation pipeline, a blower cooperating with the dehumidification heat exchanger, and the air outlet direction of the blower faces the condenser of the unit.

3. The dehumidifying device according to claim 1, wherein Further comprising: A pressure detection module for detecting the evaporation pressure of the refrigeration and dehumidification module; A first temperature sensor for detecting the refrigerant temperature at the outlet side of the refrigeration and dehumidification module; A throttling device arranged on the circulation pipeline to adjust the refrigerant flow rate; A controller for obtaining the evaporation temperature corresponding to the evaporation pressure, calculating the superheat degree through the evaporation temperature and the refrigerant temperature, and controlling the throttling device to adjust the refrigerant flow rate in the circulation pipeline according to the magnitude of the superheat degree.

4. The dehumidifying device according to claim 3, characterized in that, After the unit is started for a preset time, the controller controls the refrigeration and dehumidification module and the circulation component to be started, and adjusts the throttling device to a second preset opening degree.

5. The dehumidifying device according to claim 3, characterized in that The controller controls the refrigeration and dehumidification module and the circulation component to be switched on and off in a preset cycle.

6. The dehumidifying device according to claim 5, wherein When the unit is closed during the opening cycle of the refrigeration and dehumidification module and the circulation component, the controller controls the refrigeration and dehumidification module and the circulation component to be closed.

7. The dehumidifying device according to claim 3, wherein, The controller determines whether the superheat degree is within a preset superheat range. If so, it controls the throttling device to maintain at the second preset opening degree.

8. The dehumidifying device according to claim 3, characterized in that, The controller determines whether the superheat degree is less than or equal to the minimum value of the preset superheat range. If so, it controls the throttling device to be reduced to a first preset opening degree.

9. The dehumidifying device according to claim 3, wherein The controller determines whether the superheat degree is greater than the maximum value of the preset superheat range. If so, the controller shuts down the circulation component and adjusts the throttling device to an opening degree of 0.

10. The dehumidifying device according to claim 3, characterized in that, The controller determines whether the superheat degree is greater than a preset abnormal superheat degree. If so, the controller shuts down the blower of the refrigeration and dehumidification module and the circulation component, and adjusts the throttling device to an opening degree of 0.

11. The dehumidifying device according to claim 3, wherein Further comprising: A second temperature sensor for detecting the ambient temperature of the environment where the refrigeration and dehumidification module is located; when the ambient temperature is less than a preset ambient temperature, the controller shuts down the circulation component and adjusts the throttling device to an opening degree of 0; when the ambient temperature is greater than the preset ambient temperature, the controller starts the circulation component and adjusts the throttling device to the second preset opening degree.

12. The dehumidifying device according to claim 2, characterized in that, A water collection component is provided below the dehumidification heat exchanger.

13. A shell-and-tube heat exchanger, characterized in that, Comprising: The dehumidification device according to any one of claims 1 to 12.

14. An air conditioner, characterized in that, Comprising: The shell-and-tube heat exchanger according to claim 13.

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