Water system air conditioner capable of adjusting humidity

Abstract

The utility model provides a water system air conditioner capable of adjusting humidity, which comprises an indoor heat exchanger and a water supply system communicated with the indoor heat exchanger, the indoor heat exchanger, a first heat exchanger, a second heat exchanger, a compressor and a throttling device are respectively communicated with an outlet and an inlet of the water supply system through a water supply pipe and a water return pipe, and a water valve is arranged on the water return pipe. The water valve is integrated with a flow sensor, a return water temperature sensor and a control ball valve, the first heat exchanger, the second heat exchanger, the compressor and the throttling device are connected to form a refrigerant circulation system, and the first heat exchanger and the second heat exchanger are located on the two sides of the indoor heat exchanger correspondingly so as to precool and reheat air correspondingly. According to the water system air conditioner, the humidity of supplied air can be adjusted, the humidity can be accurately adjusted in the humidity adjusting mode in cooperation with adjustment of the opening degree of the water valve, and therefore the temperature and the humidity are strictly controlled, the indoor comfort of a high-humidity building scene is met, and meanwhile the total power consumption is low.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning structures, in particular to a water system air-conditioning capable of adjusting humidity. Background Art

[0002] Water system air conditioning uses water as the refrigerant. Water system air conditioning is larger than traditional fluorine systems and is generally used in large buildings. At the same time, the opening rate is over 90%, which saves energy. The water system will bear all the indoor loads by the hot and cold water units. The fan coil units in each room are connected to the hot and cold water units through pipes, and the cold and hot water provided are used for cooling and heating.

[0003] However, the existing traditional comfort air conditioners mainly focus on temperature control, and cannot effectively control indoor humidity in some application scenarios with dense indoor population and high moisture dissipation. Utility Model Content

[0004] The main purpose of the utility model is to provide a water system air conditioner with adjustable humidity, aiming at realizing humidity control for the water system air conditioner.

[0005] To achieve the above object, the utility model provides a water system air conditioner with adjustable humidity, comprising an indoor heat exchanger and a water supply system connected thereto, an indoor heat exchanger, a first heat exchanger, a second heat exchanger, a compressor and a throttling device, wherein:

[0006] The indoor heat exchanger is connected to the outlet and inlet of the water supply system through a water supply pipe and a return pipe respectively. A water valve is installed on the return pipe. The water valve is integrated with a flow sensor, a return water temperature sensor and a control ball valve. The first heat exchanger, the second heat exchanger, the compressor and the throttling device are connected to form a refrigerant circulation system. The first heat exchanger and the second heat exchanger are respectively located on both sides of the indoor heat exchanger to pre-cool and reheat the air respectively.

[0007] Preferably, the water system air conditioner with adjustable humidity further comprises a controller for temperature and humidity control, and the controller is electrically connected to the compressor and the water valve.

[0008] Preferably, the humidity-adjustable water system air conditioner further comprises a water supply temperature sensor installed on the water supply pipe.

[0009] Preferably, the indoor heat exchanger is installed on an indoor unit casing, a humidity sensor and a temperature sensor are installed on the indoor unit casing, and both the humidity sensor and the temperature sensor are electrically connected to the controller.

[0010] Preferably, the humidity-adjustable water system air conditioner further comprises an indoor air supply fan installed inside the indoor unit housing, and the indoor air supply fan is electrically connected to the controller.

[0011] Preferably, the water system air conditioner with adjustable humidity further comprises a display, and the display is electrically connected to the controller via a gateway.

[0012] Preferably, the water valve is electrically connected to the controller via an actuator.

[0013] Preferably, the controller is provided with an indoor blower switch, a cooling and heating mode switching key, a temperature adjustment key and a humidity adjustment key.

[0014] Preferably, the controller is also connected to a power indicator light.

[0015] The water system air conditioner with adjustable humidity proposed in the utility model is connected through a first heat exchanger, a second heat exchanger, a compressor and a throttling device to form a refrigerant circulation system. After the air is pre-cooled by the first heat exchanger, the air is re-cooled by the indoor heat exchanger, and then heated by the second heat exchanger to adjust the humidity of the supply air. This humidity adjustment mode, combined with the adjustment of the water valve opening, can accurately adjust the humidity, thereby achieving stricter control of temperature and humidity, meeting the indoor comfort of high-humidity building scenes, and its total power consumption is low. In addition, the water system air conditioner has the advantages of simple structure and reliable operation. In addition, because the water valve is integrated with a control ball valve, an actuator, a flow sensor, and a return water temperature sensor, pressure-independent water flow control and proportional integral regulation are realized on the same valve body at the same time, and it has energy monitoring and temperature difference management functions, which prevents the phenomenon of large flow and small temperature difference in the terminal equipment, and further reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the water system air conditioner capable of adjusting humidity according to the utility model.

[0017] In the figure, 1-compressor, 2-indoor heat exchanger, 3-indoor fan, 4-humidity sensor, 5-power indicator light, 6-indoor fan switch, 7-cooling and heating mode switching key, 8-set temperature increase key, 9-set temperature decrease key, 10-set humidity increase key, 11-set humidity decrease key, 12-signal line, 13-control cabinet, 14-display screen, 15-throttling device, 16-flow meter, 17-return water temperature sensor, 18 (21)-water valve signal line, 19-gateway, 20-actuator, 22-display, 23-return water pipe, 24-supply water temperature sensor, 25-supply water pipe, 26-control ball valve.

[0018] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] 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.

[0020] It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] Reference Figure 1 In this preferred embodiment, a water system air conditioner capable of adjusting humidity includes an indoor heat exchanger 2 and a water supply system connected thereto, the indoor heat exchanger 2, a first heat exchanger, a second heat exchanger, a compressor 1 and a throttling device 15, wherein:

[0022] The indoor heat exchanger 2 is connected to the outlet and inlet of the water supply system through the water supply pipe 25 and the return pipe 23 respectively. A water valve is installed on the return pipe 23. The water valve is integrated with a flow sensor (an ultrasonic flow meter can be used), a return water temperature sensor 17 and a control ball valve 26. The first heat exchanger, the second heat exchanger, the compressor 1 and the throttling device 15 are connected to form a refrigerant circulation system. The first heat exchanger and the second heat exchanger are respectively located on both sides of the indoor heat exchanger 2 to pre-cool and reheat the air respectively (reheating to adjust the humidity).

[0023] Furthermore, the humidity-adjustable water system air conditioner further includes a controller for temperature and humidity control (the controller is installed inside the control cabinet 13), and the controller is electrically connected to the compressor 1 and the water valve. The controller may be a PLC controller, and the circuit diagram of the controller connected to the compressor 1 and the water valve adopts the conventional connection in the prior art, so the corresponding description of the circuit diagram is omitted in the present invention.

[0024] By setting up a controller, there is no need for manual on-site debugging, which greatly reduces the debugging time. It can receive the signal of the temperature and humidity sensor 4 and control both the water valve and the compressor 1 to achieve precise temperature and humidity control. In addition, the integrated control of the compressor 1 and the water valve can reduce on-site construction problems and installation time.

[0025] Furthermore, the humidity-adjustable water system air conditioner further includes a water supply temperature sensor 24 installed on the water supply pipe 25 .

[0026] In this embodiment, the indoor heat exchanger 2 is installed on the indoor unit casing, and a humidity sensor 4 and a temperature sensor are installed on the indoor unit casing. Both the humidity sensor 4 and the temperature sensor are electrically connected to the controller.

[0027] Furthermore, the humidity-adjustable water system air conditioner further includes an indoor air supply fan 3 installed inside the indoor unit housing, and the indoor air supply fan 3 is electrically connected to the controller.

[0028] Furthermore, the humidity-adjustable water system air conditioner further includes a display 22, which is electrically connected to the controller via the gateway 19. The gateway 19 is used to perform logic editing via the display 22 to achieve the required control function, which makes subsequent maintenance simple, and can read the data of the controller and the actuator 20 to clearly understand the terminal energy consumption.

[0029] The water valve is electrically connected to the controller through the actuator 20. The controller is provided with an indoor blower switch 6 (controlling the indoor blower 3 to be turned on or off), a cooling and heating mode switching key, a temperature adjustment key and a humidity adjustment key. The controller is also connected to a power indicator light 5. The controller is provided with a display screen 14, which can display the current set temperature and humidity values ​​and the return air temperature and humidity parameters fed back by the return air temperature and humidity sensor 4 of the air conditioner.

[0030] The working principle of the water system air conditioner is described in detail below (taking refrigeration as an example).

[0031] After being pre-cooled by the first heat exchanger, the air is cooled by the indoor heat exchanger 2 and then sent to the room. It is dehumidified by the heating section composed of the second heat exchanger and finally sent to the room (the dehumidification intensity is adjusted by adjusting the power of the compressor 1). The cold water of the water supply system flows through the indoor heat exchanger 2 through the water supply pipe 25 for heat exchange and then flows out through the return pipe 23.

[0032] When the indoor air supply fan switch 6 is turned on, the indoor air supply fan 3 is turned on, and the controller calculates the deviation between the current set temperature and humidity and the temperature and humidity signals fed back by the temperature sensor on the indoor unit housing, and outputs a control signal to the actuator 20. The actuator 20 corresponds the control signal to the flow value in the cooling or heating mode, and uses the converted flow signal as the flow setting value of the actuator 20. The flow meter 16 measures the current actual flow value and feeds it back to the actuator 20. The actuator 20 calculates the deviation between the actual flow value and the set flow value, controls the opening of the control ball valve 26, and makes the measured flow match the set flow, thereby increasing or reducing the heat exchange, so that the return air temperature of the air conditioner matches the set temperature to achieve temperature control. The humidity sensor 4 on the indoor unit housing feeds back the humidity signal to the controller, and the controller calculates the deviation between the humidity measurement value and the set value (demand value), and outputs a signal to control the compressor 1, increase / reduce the power of the compressor 1, thereby controlling the pre-cooling and reheating amount, dehumidifying, and making the humidity measurement value match the set value, thereby achieving humidity control.

[0033] The return water temperature sensor 17 and the supply water temperature sensor 24 transmit the temperature signal value to the actuator 20. The actuator 20 calculates the temperature difference. When it is lower than the non-energy-saving temperature difference, the actuator 20 preferentially executes the internal temperature difference management function, reduces the opening of the control ball valve 26, avoids the non-energy-saving phenomenon of large flow and small temperature difference, and then cooperates with the controller to control the return air temperature.

[0034] The gateway 19 performs logic editing through the display 22, and can set the minimum and maximum flow rates of the actuator 20 in winter and summer states, correspond to the control signal, perform point matching with the controller's hot and cold modes, set humidity values, and set deviation calculations, as well as develop the above-mentioned other functions. At the same time, it can read the data of the controller and the actuator 20, clearly understand the terminal energy consumption, greatly reduce the debugging workload of the electric water valve, obtain terminal energy consumption analysis data, and achieve precise control of indoor working conditions, reducing on-site construction problems and installation time.

[0035] The water system air conditioner with adjustable humidity proposed in the utility model is connected through a first heat exchanger, a second heat exchanger, a compressor 1 and a throttling device 15 to form a refrigerant circulation system. After the air is pre-cooled by the first heat exchanger, the air is re-cooled by the indoor heat exchanger 2, and then heated by the second heat exchanger to adjust the humidity of the supply air. This humidity adjustment mode, combined with the adjustment of the water valve opening, can accurately adjust the humidity, thereby achieving stricter control of temperature and humidity, meeting the indoor comfort of high-humidity building scenes, and its total power consumption is low. In addition, the water system air conditioner has the advantages of simple structure and reliable operation. In addition, because the water valve is integrated with a control ball valve 26, an actuator 20, a flow sensor, and a return water temperature sensor 17, pressure-independent water flow control and proportional integral regulation are realized on the same valve body at the same time, and it has energy monitoring and temperature difference management functions, which prevents the phenomenon of large flow and small temperature difference in terminal equipment, and further reduces energy consumption.

[0036] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A water system air conditioner capable of adjusting humidity, characterized in that: It includes an indoor heat exchanger and a water supply system connected thereto, an indoor heat exchanger, a first heat exchanger, a second heat exchanger, a compressor and a throttling device, wherein: The indoor heat exchanger is connected to the outlet and inlet of the water supply system through a water supply pipe and a return pipe respectively. A water valve is installed on the return pipe. The water valve is integrated with a flow sensor, a return water temperature sensor and a control ball valve. The first heat exchanger, the second heat exchanger, the compressor and the throttling device are connected to form a refrigerant circulation system. The first heat exchanger and the second heat exchanger are respectively located on both sides of the indoor heat exchanger to pre-cool and reheat the air respectively.

2. The humidity-adjustable water system air conditioner according to claim 1, characterized in that: The utility model also comprises a controller for temperature and humidity control, wherein the controller is electrically connected to the compressor and the water valve.

3. The humidity-adjustable water system air conditioner according to claim 2, characterized in that: Also included is a water supply temperature sensor installed on the water supply pipe.

4. The humidity-adjustable water system air conditioner according to claim 2, characterized in that: The indoor heat exchanger is installed on the indoor unit casing. A humidity sensor and a temperature sensor are installed on the indoor unit casing. Both the humidity sensor and the temperature sensor are electrically connected to the controller.

5. The humidity-adjustable water system air conditioner according to claim 2, characterized in that: It also includes an indoor air supply fan installed inside the indoor unit shell, and the indoor air supply fan is electrically connected to the controller.

6. The humidity-adjustable water system air conditioner according to claim 2, characterized in that: A display is also included, and the display is electrically connected to the controller through the gateway.

7. The humidity-adjustable water system air conditioner according to claim 2, characterized in that: The water valve is electrically connected to the controller via an actuator.

8. The humidity-adjustable water system air conditioner according to claim 5, characterized in that: The controller is provided with an indoor air supply fan switch key, a cooling and heating mode switching key, a temperature adjustment key and a humidity adjustment key.

9. The humidity-adjustable water system air conditioner according to any one of claims 2 to 8, characterized in that: The controller is also connected to a power indicator light.

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