An air conditioning system for controlling the humidity of air supplied to a refrigerated area and / or a baggage area

Abstract

The application discloses an air conditioning system for controlling the humidity of air supply in refrigeration area and / or luggage area, comprising: a box body, one end of which is provided with an air return port, and the other end is provided with an air outlet; a filter, a central refrigerant water coil, a low-temperature brine coil, a central heat medium water coil and an air supply fan are sequentially arranged in the box body along the direction from the air return port to the air outlet, wherein the flow medium in the low-temperature brine coil is brine return water of a refrigeration system, a brine frequency conversion circulating pump is arranged on the water inlet pipe of the low-temperature brine coil, a first frequency conversion electric control two-way valve and an electric control three-way valve are sequentially arranged on the water outlet pipe of the low-temperature brine coil, and a bypass port of the electric control three-way valve is communicated with the water inlet of the brine frequency conversion circulating pump through a bypass pipe, so that the brine frequency conversion circulating pump simultaneously sucks part of the brine discharged through the water outlet pipe and part of the brine return water of the refrigeration system, the temperature of the brine return water is not higher than zero Celsius, and the brine temperature at the water outlet of the brine frequency conversion circulating pump is not lower than zero Celsius.

Description

Technical Field

[0001] This invention relates to the field of temperature and humidity control technology, and in particular to an air conditioning system for controlling the humidity of the air supplied to the refrigerated area and / or luggage area. Background Technology

[0002] For passenger ships equipped with refrigerated rooms / baggage areas, the required room temperature is not high. At the same time, for the comfort of the staff, the room temperature cannot be too low, so air conditioning is necessary. However, the air conditioning in these areas requires lower temperatures and higher humidity than other areas. The refrigerant supply / return temperature of the cooling coil of a typical air conditioner is 6 / 14℃, which can only meet the temperature requirements but cannot meet the lower humidity control requirements at the same time. If a low-temperature cold source is used, its COP is low and the energy consumption is too high. Summary of the Invention

[0003] In view of the above-mentioned problems existing in the prior art, the present invention provides an air conditioning system for controlling the humidity of the supply air in the refrigeration area and / or luggage area. The system controls the humidity of the cold storage and / or luggage area by adding a set of low-temperature brine dehumidification coils to the unit's heating and cooling coils. The brine return water of the refrigeration system, which is lower than the refrigerant water supply temperature of the central air conditioner, is used to cool and dehumidify the air. This achieves precise humidity control at a slightly lower temperature than other air-conditioned service areas, thus avoiding condensation.

[0004] This invention provides an air conditioning system for controlling the humidity of the air supplied to the refrigerated area and / or luggage area, comprising:

[0005] The housing has a return air vent at one end and an air outlet at the other end.

[0006] Inside the housing, along the direction from the return air inlet to the air outlet, a filter, a central chilled water coil, a low-temperature brine coil, a central hot water coil, and a blower are sequentially arranged.

[0007] The streaming water in the low-temperature brine coil is the brine return water from the refrigeration system. A brine variable frequency circulation pump is installed on the inlet pipe of the low-temperature brine coil. A first variable frequency electrically controlled two-way valve and an electrically controlled three-way valve are sequentially installed on the outlet pipe of the low-temperature brine coil. One bypass port of the electrically controlled three-way valve is connected to the inlet of the brine variable frequency circulation pump through a bypass pipe, so that the brine variable frequency circulation pump draws in a mixture of brine discharged through the outlet pipe and brine return water from the refrigeration system. The temperature of the brine return water from the refrigeration system is not greater than zero degrees Celsius, and the inlet temperature of the low-temperature brine coil is not less than zero degrees Celsius.

[0008] In some embodiments of the present invention, a humidity sensor is provided on the air inlet pipe corresponding to the air inlet;

[0009] A first temperature sensor is installed on the water supply pipe between the outlet of the brine variable frequency circulating pump and the inlet of the low temperature brine coil.

[0010] Both the humidity sensor and the first temperature sensor are connected to the first controller. The first controller is used to control the first variable frequency electrically controlled two-way valve and the electrically controlled three-way valve based on the humidity signal from the humidity sensor and the temperature signal from the first temperature sensor.

[0011] In some embodiments of the present invention, if the humidity value detected by the humidity sensor exceeds the set humidity value, the opening degree of the first variable frequency electronically controlled two-way valve is increased by the first controller, and the mixed refrigerant is adjusted by the electronically controlled three-way valve to increase the mixing ratio of brine return water in the mixed refrigerant of the refrigeration system, and at the same time increase the speed of the brine variable frequency circulation pump to increase the brine flow rate in the low temperature brine coil.

[0012] In some embodiments of the present invention, if the temperature value measured by the first temperature sensor is lower than the first set temperature, the opening degree of the first variable frequency electrically controlled two-way valve and the electrically controlled three-way valve is controlled by the first controller to increase the proportion of brine discharged from the outlet pipe in the inlet water of the brine variable frequency circulation pump.

[0013] In some embodiments of the present invention, a second temperature sensor is provided inside the housing between the central chilled water coil and the low-temperature brine coil, and a third temperature sensor is provided between the central hot water coil and the blower. Both the second and third temperature sensors are signal-connected to a second controller, so that the second controller controls the second variable frequency electrically controlled two-way valve on the outlet pipe of the central chilled water coil based on the temperature signal from the second temperature sensor, and controls the third variable frequency electrically controlled two-way valve on the outlet pipe of the central hot water coil based on the temperature signal from the third temperature sensor.

[0014] In some embodiments of the present invention, if the temperature value measured by the second temperature sensor is higher than the second set temperature, the second controller controls the opening of the second variable frequency electrically controlled two-way valve on the outlet pipe of the central chilled water coil to increase, thereby increasing the flow rate of chilled water in the central chilled water coil.

[0015] In some embodiments of the present invention, if the temperature value measured by the third temperature sensor is lower than the third set temperature, the second controller controls the opening of the third frequency-controlled two-way valve on the outlet pipe of the central heat medium water coil to increase, thereby increasing the flow rate of the heat medium water in the central heat medium water coil.

[0016] In some embodiments of the present invention, an air outlet is provided with an air outlet duct to deliver air to the refrigerated area and / or the luggage area through the air outlet duct, wherein...

[0017] The air outlet duct is connected to the area above the ceiling of the refrigerated area and / or luggage area, and the other side of the area above the ceiling of the refrigerated area and / or luggage area is provided with a return air duct connected to the return air inlet.

[0018] Compared with the prior art, the beneficial effects of the air conditioning system for controlling the air supply humidity of the refrigerated area and / or luggage area provided by the embodiments of the present invention are as follows: on the basis of the unit's heating and cooling coils, an additional set of low-temperature brine dehumidification coils is added. The brine return water of the refrigeration system, which is lower than the supply water temperature of the central air conditioner's chilled water, is used for the air handling process of cooling and dehumidification. This achieves precise humidity control under slightly lower temperature requirements than other air-conditioned service areas, avoiding condensation. At the same time, the residual cooling of the brine in the refrigeration system is fully utilized to save energy. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of an air conditioner in an air conditioning system for controlling the humidity of the air supply to the refrigerated area and / or luggage area, provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram illustrating the control principle of an air conditioning system for controlling the humidity of the air supplied to the refrigerated area and / or luggage area, as provided in an embodiment of the present invention.

[0021] Figure Labels

[0022] 1. Housing; 2. Return air vent; 3. Air outlet; 4. Filter; 5. Central chilled water coil;

[0023] 6. Low-temperature brine coil; 7. Central heating medium water coil; 8. Blower; 9. Brine variable frequency circulating pump;

[0024] 10. First frequency converter electrically controlled two-way valve; 11. Electrically controlled three-way valve; 12. Bypass pipe; 13. Humidity sensor;

[0025] 14. First temperature sensor; 15. First controller; 16. Second temperature sensor;

[0026] 17. Third temperature sensor; 18. Second controller; 19. Second variable frequency electrically controlled two-way valve;

[0027] 20. Third variable frequency electrically controlled two-way valve; 21. Air outlet duct; 22. Return air duct. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0030] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0031] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0032] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0033] Specific embodiments of this application are described below with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to ascertain the true intent based on the user's historical operations, and to avoid unnecessary or redundant details that would obscure this application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in various ways with substantially any suitable detailed structure.

[0034] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0035] This invention provides an air conditioning system for controlling the humidity of the air supplied to the refrigerated and / or baggage areas of a passenger ship, serving the refrigerated and / or baggage areas to control the temperature and humidity of these areas. The air conditioning system includes:

[0036] The cabinet 1 has a return air vent 2 (i.e., an air inlet; the refrigerated area / luggage area / refrigerated preparation room generally uses a full return air air conditioning system) at one end and an air outlet 3 at the other end.

[0037] Inside the housing 1, along the direction from the return air inlet 2 to the air outlet 3, a filter 4, a central refrigerant water coil 5, a low-temperature brine coil 6, a central heat transfer water coil 7, and a blower 8 are arranged in sequence. The housing 1, the filter 4, the central refrigerant water coil 5, the low-temperature brine coil 6, the central heat transfer water coil 7, and the blower 8 together constitute an air conditioner. Specifically, the return air enters the air conditioner through the return air inlet 2, is filtered by the filter 4, and is cooled and / or dehumidified by the central refrigerant water coil 5 and the low-temperature brine coil 6. If heating is required, it is heated by the central heat transfer water coil 7, and finally, it is sent out through the air outlet 3 by the blower 8.

[0038] The fluid in the low-temperature brine coil 6 is the brine return water from the refrigeration system. A brine variable frequency circulation pump 9 is installed on the inlet pipe of the low-temperature brine coil 6. A first variable frequency electrically controlled two-way valve 10 and an electrically controlled three-way valve 11 are sequentially installed on the outlet pipe of the low-temperature brine coil 6. One bypass port of the electrically controlled three-way valve 11 is connected to the inlet of the brine variable frequency circulation pump 9 via a bypass pipe 12, thereby adjusting the mixing ratio of the return water and the inlet water of the low-temperature brine coil 6, so that the brine variable frequency circulation pump 9 simultaneously draws in a portion of the brine from the refrigeration system. The brine discharged from the outlet pipe and a portion of the brine return water from the refrigeration system are mixed refrigerant (brine). The temperature of the brine return water from the refrigeration system is not higher than zero degrees Celsius, and the inlet temperature of the low-temperature brine coil 6 is not lower than zero degrees Celsius to prevent the low-temperature brine coil 6 from freezing and cracking. In this way, the brine return water is used to control the humidity of the air supply to the refrigerated area and / or baggage area of ​​the passenger ship, reduce the overall humidity of the air supply, and prevent the air supply from entering a low-temperature environment and causing condensation. This not only effectively meets the high humidity requirements, but also utilizes the excess cooling capacity of the brine system, saving energy.

[0039] In order to facilitate the control of humidity and temperature in the air conditioner, in this embodiment, a humidity sensor 13 is provided on the air inlet pipe corresponding to the air inlet; a first temperature sensor 14 is provided on the water supply pipe between the outlet of the brine variable frequency circulation pump 9 and the inlet of the low temperature brine coil 6.

[0040] The humidity sensor 13 and the first temperature sensor 14 are both connected to the first controller 15. The first controller 15 is used to control the first frequency-controlled two-way valve 10 and the first temperature sensor 14 based on the humidity signal from the humidity sensor 13 and the temperature signal from the first temperature sensor 14.

[0041] Specifically, if the humidity value detected by the humidity sensor 13 exceeds the set humidity value, the first controller 15 controls the opening of the first variable frequency electronically controlled two-way valve 10 to increase, and the electronically controlled three-way valve 11 adjusts the mixed refrigerant to increase the mixing ratio of the brine return water in the mixed refrigerant. At the same time, the speed of the brine variable frequency circulation pump 9 is increased to increase the brine flow rate in the low-temperature brine coil 6, so as to achieve precise humidity control. That is, the first controller 15 controls the electronically controlled three-way valve 11, and the bypass pipe 12 controls the ratio of brine return water drawn into the brine variable frequency circulation pump 9 to the total water volume, so as to achieve the mixing and adjustment of brine return water and brine return water through the refrigeration system, thereby controlling the brine supply temperature. To avoid the coil freezing, the supply temperature of the low-temperature brine coil 6 is adjusted to be greater than 0°C.

[0042] Furthermore, if the temperature value measured by the first temperature sensor 14 is lower than the first set temperature, the first controller 15 controls the opening of the first variable frequency electric two-way valve 10 and the electric three-way valve 11 to increase the proportion of brine discharged from the outlet pipe in the inlet water of the brine variable frequency circulation pump 9.

[0043] In some embodiments of the present invention, in order to more accurately control the air supply temperature of the air conditioner, a second temperature sensor 16 is provided inside the housing 1 between the central refrigerant water coil 5 and the low-temperature brine coil 6, and a third temperature sensor 17 is provided between the central heat medium water coil 7 and the blower 8. Both the second temperature sensor 16 and the third temperature sensor 17 are signal-connected to the second controller 18, so that the second controller 18 controls the second variable frequency electrically controlled two-way valve 19 on the outlet pipe of the central refrigerant water coil 5 based on the temperature signal of the second temperature sensor 16, and controls the third variable frequency electrically controlled two-way valve 20 on the outlet pipe of the central heat medium water coil 7 based on the temperature signal of the third temperature sensor 17.

[0044] Specifically, if the temperature value measured by the second temperature sensor 16 is higher than the second set temperature, the second controller 18 controls the opening of the second frequency-controlled two-way valve 19 on the outlet pipe of the central chilled water coil 5 to increase the inlet flow rate of chilled water in the central chilled water coil 5.

[0045] Furthermore, if the temperature value measured by the third temperature sensor 17 is lower than the third set temperature, the second controller 18 controls the opening of the third frequency-controlled two-way valve 20 on the outlet pipe of the central heat medium water coil 7 to increase the inlet flow rate of the heat medium water in the central heat medium water coil 7.

[0046] In this embodiment, an air outlet 3 is provided with an air outlet 21 to deliver air to the refrigerated area and / or luggage area. The air outlet 21 is connected to the area above the ceiling of the refrigerated area and / or luggage area, and the other side of the area above the ceiling of the refrigerated area and / or luggage area is provided with a return air duct 22 connected to the return air outlet 2.

[0047] As can be seen from the above technical solution, the air conditioning system for controlling the air supply humidity of the refrigerated area and / or luggage area provided in the above embodiments of the present invention adds a set of low-temperature brine dehumidification coils on the basis of the unit's heating and cooling coils. It uses the brine return water of the refrigerated system, which is lower than the supply water temperature of the central air conditioner's chilled water, to carry out the air treatment process of cooling and dehumidification, so as to achieve precise humidity control under the temperature requirements that are slightly lower than other air-conditioned service areas and avoid condensation; at the same time, it makes full use of the residual cold of the brine in the refrigerated system to save energy.

[0048] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. An air conditioning system for controlling the humidity of air supplied to a refrigerated area and / or a baggage area, characterised in that, include: The housing has a return air vent at one end and an air outlet at the other end. Inside the housing, along the direction from the return air inlet to the air outlet, a filter, a central chilled water coil, a low-temperature brine coil, a central hot water coil, and a blower are sequentially arranged. The streaming water in the low-temperature brine coil is the brine return water from the refrigeration system. The brine return water comes from the refrigeration system and its temperature is lower than the refrigerant water supply temperature of the central air conditioner. The brine return water is used to control the temperature and humidity of the air supplied to the refrigerated area and / or baggage area of ​​the passenger ship. A brine variable frequency circulation pump is installed on the inlet pipe of the low-temperature brine coil. A first variable frequency electrically controlled two-way valve and an electrically controlled three-way valve are installed sequentially on the outlet pipe of the low-temperature brine coil. One of the bypass ports of the electrically controlled three-way valve is connected to the inlet of the brine variable frequency circulation pump through a bypass pipe, so that the brine variable frequency circulation pump draws in a mixture of brine discharged through the outlet pipe and refrigerant from the brine return water of the refrigeration system. The temperature of the brine return water of the refrigeration system is not greater than zero degrees Celsius, and the inlet temperature of the low-temperature brine coil is not less than zero degrees Celsius. A humidity sensor is installed on the air inlet duct corresponding to the return air vent. A first temperature sensor is installed on the water supply pipe between the outlet of the brine variable frequency circulating pump and the inlet of the low temperature brine coil. Both the humidity sensor and the first temperature sensor are connected to the first controller. The first controller is used to control the first variable frequency electrically controlled two-way valve and the electrically controlled three-way valve based on the humidity signal from the humidity sensor and the temperature signal from the first temperature sensor. The first controller can control the electric three-way valve, and the bypass pipe can control the ratio of brine return water drawn into the brine variable frequency circulation pump to the total intake water volume, so as to achieve the mixing and adjustment of brine return water and brine return water through the refrigeration system, control the brine supply water temperature, and adjust the low temperature brine coil supply water temperature to greater than 0°C. If the humidity value detected by the humidity sensor exceeds the set humidity value, the first controller controls the opening of the first variable frequency electronically controlled two-way valve to increase, and the electronically controlled three-way valve is used to adjust the mixed refrigerant, thereby increasing the mixing ratio of the brine return water in the mixed refrigerant and simultaneously increasing the speed of the brine variable frequency circulation pump to increase the brine flow rate in the low-temperature brine coil, so as to enhance dehumidification. If the temperature value measured by the first temperature sensor is lower than the first set temperature, the first controller controls the opening of the first variable frequency electrically controlled two-way valve and the electrically controlled three-way valve to increase the proportion of brine discharged from the outlet pipe in the brine variable frequency circulation pump in order to increase the inlet water temperature. Through the above control, the supply water temperature of the low-temperature brine coil is adjusted to be greater than 0°C, which not only controls humidity but also prevents the coil from freezing. At the same time, based on the unit's hot and cold coils, an additional low-temperature brine dehumidification coil is added. This utilizes the brine return water from the refrigeration system, which is at a temperature lower than the supply water temperature of the central air conditioner's chilled water, to perform a cooling and dehumidification air treatment process, thereby controlling humidity at a slightly lower temperature than other air-conditioned service areas.

2. The air conditioning system for controlling the humidity of the air supplied to the refrigerated area and / or luggage area according to claim 1, characterized in that, A second temperature sensor is installed inside the housing between the central chilled water coil and the low-temperature brine coil, and a third temperature sensor is installed between the central hot water coil and the blower. Both the second and third temperature sensors are connected to a second controller so that the second controller controls the second variable frequency electrically controlled two-way valve on the outlet pipe of the central chilled water coil based on the temperature signal from the second temperature sensor, and controls the third variable frequency electrically controlled two-way valve on the outlet pipe of the central hot water coil based on the temperature signal from the third temperature sensor.

3. The air conditioning system for controlling the humidity of the air supplied to the refrigerated area and / or luggage area according to claim 2, characterized in that, If the temperature value measured by the second temperature sensor is higher than the second set temperature, the second controller controls the opening of the second frequency-controlled two-way valve on the outlet pipe of the central chilled water coil to increase the flow rate of chilled water in the central chilled water coil.

4. The air conditioning system for controlling the humidity of the air supplied to the refrigerated area and / or luggage area according to claim 3, characterized in that, If the temperature value measured by the third temperature sensor is lower than the third set temperature, the second controller controls the opening of the third frequency-controlled two-way valve on the outlet pipe of the central heat medium water coil to increase the flow rate of the heat medium water in the central heat medium water coil.

5. The air conditioning system for controlling the humidity of the air supplied to the refrigerated area and / or luggage area according to claim 4, characterized in that, An air outlet is provided with an air outlet duct to deliver air to the refrigerated area and / or luggage area. The air outlet duct is connected to the area above the ceiling of the refrigerated area and / or luggage area, and the other side of the area above the ceiling of the refrigerated area and / or luggage area is provided with a return air duct connected to the return air inlet.

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