Radiant air conditioner

Abstract

The present invention relates to a radiant air conditioner, and relates to the technical field of air conditioners. The radiant air conditioner includes a controller, a heat exchange and dehumidification device, a water inlet pipe, a water return pipe, a first flow valve, a second flow valve, a third flow valve, a mixing valve, a temperature sensor and a radiation terminal; the water inlet of the heat exchange and dehumidification device is connected to the water inlet pipe, and the water outlet is connected to the mixing valve through the first flow valve; the mixing valve is also connected to the water inlet pipe through the second flow valve, and is connected to the water return pipe through the third flow valve; the water inlet of the radiation terminal is connected to the mixing valve, and the water return port is connected to the water return pipe; the controller is respectively connected to the first flow valve, the second flow valve, the third flow valve and the temperature sensor. The radiant air conditioner of the embodiment of the present application can process the indoor air to reduce the air humidity when radiant cooling is performed on the indoor air, and can also avoid condensation when the air contacts the radiation terminal.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a radiation type air conditioner. Background Art

[0002] The capillary tube and radiation unit module act as the terminal of the air conditioning system in the building, forming a radiant air conditioning system. Radiant air conditioning realizes independent control of temperature and humidity, and has the advantages of large heat exchange area, good thermal conductivity, and uniform heat exchange. However, the control technology of room humidity for radiant air conditioning is still immature, and condensation occurs from time to time.

[0003] At present, capillary radiation air conditioners use "gravity breathing wall" dehumidification devices, independent fresh air fans and other methods to control the humidity in the room to avoid condensation. However, the dehumidification device cannot provide additional cooling capacity for the room, and the dehumidification range is small, which cannot meet the needs of large dehumidification capacity; independent fresh air dehumidifiers use fresh air to bear the humidity load in the room, and need to control the opening of the fresh air fan separately, so the scope of application is small.

[0004] How to ensure humidity control of radiant air conditioners to avoid condensation is an important issue that needs to be solved for radiant air conditioners, and is also an important difficulty in the actual engineering application of radiant air conditioners. Summary of the invention

[0005] The first purpose of the present invention is to avoid the shortcomings of the prior art and provide a radiant air conditioner that can process indoor air and reduce air humidity while performing radiant cooling on the indoor air, while also avoiding condensation when the air comes into contact with the radiation end.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A radiant air conditioner, comprising:

[0008] A controller, a heat exchange and dehumidification device, a water inlet pipe, a water return pipe, a first flow valve, a second flow valve, a third flow valve, a water mixing valve, a temperature sensor and a radiation terminal;

[0009] The water inlet of the heat exchange and dehumidification device is connected to the water inlet pipe, and the water outlet of the heat exchange and dehumidification device is connected to the water mixing valve through the first flow valve;

[0010] The mixing valve is also connected to the water inlet pipe through the second flow valve, and is connected to the water return pipe through the third flow valve;

[0011] The water inlet of the radiation end is connected to the mixing valve, and the water return port of the radiation end is connected to the water return pipe;

[0012] The temperature sensor is used to detect the temperature of the pipe between the water inlet of the radiation end and the mixing valve;

[0013] The controller is connected to the first flow valve, the second flow valve, the third flow valve and the temperature sensor respectively.

[0014] Further, when the temperature detected by the temperature sensor is higher than the dew point temperature of the air on the air inlet side of the radiation terminal, the controller controls the first flow valve and the second flow valve to open.

[0015] Further, when the temperature detected by the temperature sensor is lower than the air dew point temperature on the air inlet side of the radiation terminal, the controller controls the first flow valve, the second flow valve and the third flow valve to open.

[0016] Further, when the temperature detected by the temperature sensor is lower than the air dew point temperature on the air inlet side of the radiation end, and when the first flow valve, the second flow valve and the third flow valve are all in an open state, the controller closes the second flow valve.

[0017] Furthermore, the radiation terminal includes a plurality of radiation terminal units arranged mutually, and each of the radiation terminal units includes a water inlet branch pipe, a water outlet branch pipe and a water return branch pipe;

[0018] For each of the radiation terminal units, one end of its water inlet branch pipe is connected to the water mixing valve channel, and the other end is connected to one end of its water outlet branch pipe, and the other ends of each of the water outlet branch pipes are connected to each other;

[0019] After the return water branch pipe of each radiation terminal unit is connected end to end, one end is connected to the outlet water branch pipe of each radiation terminal unit, and the other end is connected to the return water pipe, so as to collect the condensed water of each outlet water branch pipe and discharge it to the return water pipe.

[0020] Furthermore, for each of the radiation terminal units, the water inlet branch pipe and the water outlet branch pipe are arranged on both sides of the water return branch pipe.

[0021] Furthermore, the heat exchange and dehumidification device is arranged in a first shell, the radiation terminal is arranged in a second shell, the first shell is provided with an air inlet, the second shell is provided with an air outlet, and the first shell and the second shell are connected by a connecting air duct.

[0022] Furthermore, an air flow channel connecting the air duct and the air outlet is formed between one side of the radiation end and the second shell.

[0023] Furthermore, the heat exchange and dehumidification device includes a fan and a heat exchanger, the fan is connected to the controller, and the fan is used to generate an airflow from the air inlet through the heat exchanger to the connecting air duct.

[0024] Furthermore, it also includes a temperature and humidity detection device, which is connected to the controller and is used to detect the dew point temperature of the air on the air inlet side of the radiation end.

[0025] The radiant air conditioner of the embodiment of the present application can achieve the following technical effects:

[0026] 1. The present invention processes indoor air through the designed pre-dehumidification heat exchanger, the independently temperature-controlled water mixing valve and the radiation terminal, reduces the air humidity and avoids condensation when the air contacts the radiation terminal.

[0027] 2. Independent temperature control method optimizes the supply and return water temperature of the radiation terminal, ensuring the normal operation of the radiation terminal while meeting the dehumidification needs.

[0028] 3. The dehumidification temperature of the pre-dehumidification heat exchanger is independently controlled by the temperature and humidity sensor. Compared with the traditional dehumidification device, the required chilled water temperature is higher, which reduces the air conditioning dehumidification load and improves the energy saving of the system.

[0029] 4. Through the designed radiation terminal water supply and return structure, the temperature of the entire radiation terminal unit module is controlled to be uniform, avoiding uneven temperature of the cold radiation surface under the ceiling cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0031] Figure 1 is a schematic structural diagram of a radiant air conditioner in an example of an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of the overall structure of a radiant air conditioner in an example of an embodiment of the present application;

[0033] Figure 3 is a schematic diagram of the arrangement of a radiant air conditioner in an example of an embodiment of the present application;

[0034] Figure 4 is a schematic structural diagram of a radiation terminal unit in a radiation air conditioner in an example of an embodiment of the present application;

[0035] Figure 5 yes Figure 4 AA cross-section diagram.

[0036] The figures are numbered as follows: 10-heat exchange and dehumidification device; 20-radiation terminal; 30-connecting air duct; 106-flow valve; 107-second flow valve; 108-third flow valve; 109-first flow valve; 403-mixing valve; 401-fan; 402-heat exchanger; 406-water pump; 114-connecting ball valve; 204-radiation terminal unit; 601-temperature and humidity detection device; 602-temperature sensing package; A01-return water pipe; A02-water supply pipe; 2041-water inlet branch; 2042-water outlet branch; 2043-return water branch; 101-air inlet; 201-air outlet. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0039] Depending on the context, the words "if" and "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)". The present invention is further described in conjunction with the following examples.

[0040] In response to the above technical problems mentioned in the background technology, an embodiment of the present application provides a radiant air conditioner, which can process the indoor air and reduce the air humidity while performing radiant cooling on the indoor air, while also avoiding condensation when the air comes into contact with the radiation end.

[0041] like Figure 1As shown, in an exemplary embodiment, the radiant air conditioner of the present application includes a controller (not shown), a heat exchange and dehumidification device, an inlet pipe A02, a return pipe A01, a first flow valve 109, a second flow valve 107, a third flow valve 108, a mixing valve 403, a temperature sensor 602 and a radiation terminal.

[0042] like Figure 2 and Figure 3 As shown, in one example, the heat exchange dehumidification device 10 is disposed in a first shell, the radiation terminal 20 is disposed in a second shell, the first shell is provided with an air inlet 101, the second shell is provided with an air outlet 201, and the first shell and the second shell are connected via a connecting air duct 30. In other examples, the heat exchange dehumidification device 10 and the radiation terminal 20 may also be disposed in the same shell.

[0043] The arrangement of the heat exchange dehumidification device 10 and the radiation terminal 20 can be as follows: Figure 2 and 3 As shown, they are all arranged in the ceiling cavity. In other examples, the heat exchange dehumidification device 10 and the radiation terminal 20 can also be arranged in the wall, in the floor, etc. The heat exchange dehumidification device 10 and the radiation terminal 20 can also be arranged separately, for example, the heat exchange dehumidification device 10 is arranged in the ceiling, and the radiation terminal is arranged in the wall, or the heat exchange dehumidification device 10 is arranged in the wall, and the radiation terminal is arranged in the ceiling, and the two are connected by a connecting air duct.

[0044] In the embodiment of the present application, the heat exchange dehumidification device is used to perform heat exchange and dehumidification on the indoor warm and humid air by exchanging heat between chilled water and warm and humid air. In a specific example, Figure 1 As shown, the heat exchange dehumidification device may include a fan 401 and a heat exchanger 402. The fan 401 is connected to the controller and is used to generate an airflow from the air inlet 101 through the heat exchanger 402 to the air duct 30. The specific structure of the heat exchanger 402 may be a common structure such as a fin heat exchanger commonly used in a dehumidifier. When the warm and humid air passes through the heat exchanger 402, heat is exchanged with the chilled water pipe in the heat exchanger, thereby becoming wet and cold air, thereby realizing the dehumidification function.

[0045] In the embodiment of the present application, the radiation terminal 20 is used to achieve heat exchange between chilled water and warm and humid air in the environment by radiation. In some examples, the radiation terminal 20 is a radiation heat exchanger, which can specifically be a mat-shaped capillary heat exchanger.

[0046] The water inlet of the heat exchange dehumidification device is connected to the water inlet pipe A02, and the water outlet of the heat exchange dehumidification device is connected to the mixing valve 403 through the first flow valve 109. In some examples, a flow valve 106 is further provided between the heat exchange dehumidification device and the water inlet pipe A02, and in some examples, the mixing valve 403 is a temperature-controlled mixing valve.

[0047] The mixing valve 403 is also connected to the water inlet pipe A02 through the second flow valve 107, and is connected to the return pipe A01 through the third flow valve 108. In one example, the radiant air conditioner of the present application also includes a water pump 406, which is arranged between the third flow valve 108 and the return pipe A01. In other examples, the water pump 406 can also be arranged between the third flow valve 108 and the mixing valve 403.

[0048] The water inlet of the radiation end is connected to the mixing valve 403, and the water return port of the radiation end is connected to the water return pipe A01.

[0049] In a specific example, Figure 1 , Figure 4 and Figure 5 As shown, the radiation terminal includes a plurality of radiation terminal units 204 arranged mutually, and each radiation terminal unit 204 includes a water inlet branch pipe 2041 , a water outlet branch pipe 2042 and a water return branch pipe 2043 .

[0050] For each radiation terminal unit 204, one end of its water inlet branch pipe 2041 is connected to the mixing valve 403, and the other end is connected to one end of its water outlet branch pipe 2042, and the other ends of the water outlet branches of each radiation terminal unit 204 are connected to each other.

[0051] After the return branch pipe 2043 of each radiation terminal unit 204 is connected end to end, one end is connected to the outlet branch pipe 2043 of each radiation terminal unit 204, and the other end is connected to the return pipe A01, which is used to collect the condensed water of each outlet branch pipe 2043 and discharge it to the return pipe A01.

[0052] In a preferred example, Figure 4 and Figure 5 As shown, for each radiation terminal unit 204 , the water inlet branch pipe 2041 and the water outlet branch pipe 2042 are arranged on both sides of the water return branch pipe 2043 .

[0053] In a preferred example, an air flow channel is formed between the connecting air duct 30 and the air outlet 201 between one side of the radiation terminal and the second shell, so that the air dehumidified by the heat exchange and dehumidification device 10 further exchanges heat with the surface of one side of the radiation terminal when passing through the air flow channel, while the other side of the radiation terminal exchanges heat with the indoor air through the second shell.

[0054] In an embodiment of the present application, the water inlet branch 2041, the water outlet branch 2042 and the return branch 2043 of the radiation terminal jointly control the shell temperature of the radiation terminal unit 204, ensuring that the shell surface temperature is greater than the dew point temperature of the air entering the radiation terminal, and at the same time controlling the surface temperature of the entire radiation terminal to be uniform.

[0055] The temperature sensor 602 is used to detect the temperature of the pipe between the water inlet of the radiation terminal and the mixing valve 403; in one example, the temperature sensor 602 is a temperature sensing package arranged on the water inlet pipe of the radiation terminal, and is used to detect the temperature of the water inlet pipe of the radiation terminal.

[0056] The controller is respectively connected to the first flow valve 109, the second flow valve 107, the third flow valve 108, the water pump 406 and the temperature sensor 602, and is used to control the opening and closing or starting of the above valves and water pumps to control the temperature of the radiation end water inlet pipe to be lower than the air dew point temperature.

[0057] In one embodiment, Figure 1 As shown, the radiant air conditioner of the embodiment of the present application further includes a temperature and humidity detection device 601, which is connected to the controller and is used to detect the dew point temperature of the air on the air inlet side of the radiation end.

[0058] In one embodiment, the first flow valve 109 , the second flow valve 107 , the third flow valve 108 , and the flow valve 106 are all electronic flow valves.

[0059] Taking the case where the heat exchange dehumidification device 10 and the radiation terminal 20 are both installed in the cavity of the ceiling as an example, the working process of the radiation air conditioner in the embodiment of the present application is as follows:

[0060] When the radiant air conditioner enters the operating state, the chilled water on the water supply pipe A02 side enters the heat exchanger 402 through the flow valve 106, and the fan 401 is turned on at the same time. The air in the room enters the heat exchange dehumidification device 10 through the air inlet 101 of the heat exchange dehumidification device 10, and heat exchanges with the heat exchanger 402, and condenses the air in the heat exchanger 402. The condensed air enters the shell of the radiation terminal through the connecting air duct 30 between the heat exchange dehumidification device 10 and the radiation terminal 20, exchanges heat with the upper shell of the radiation terminal unit 204, and finally returns to the room through the 201 radiation terminal outlet.

[0061] (I) The working process of the water system of the radiant air conditioner in the embodiment of the present application is as follows:

[0062] The system adjusts the temperature of the chilled water entering the radiation terminal 20 through the water mixing valve 403 to prevent condensation of the dehumidified air at the radiation terminal 20. The specific process is as follows: (The dew point temperature of the air on the air inlet side of the radiation terminal 20 detected by the temperature and humidity detection device 601 is T1, and the temperature detected by the temperature sensing package 602 of the radiation terminal water inlet pipe is T2.)

[0063] State 1: Close the third flow valve 108, open the second flow valve 107 and the first flow valve 109, and the cold water at the outlet of the heat exchanger 402 passes through the first flow valve 109 and the chilled water passing through the second flow valve 107 is mixed in the mixing valve 403 and enters the radiation end. At this time, T2>T1. If T2<T1, the system enters the state 2 mode.

[0064] State 2: Open the first flow valve 109, the second flow valve 107 and the third flow valve 108. The cold water at the outlet of the heat exchanger passes through the first flow valve 109, the chilled water passing through the second flow valve 107 and the return water at the radiation end passing through the third flow valve 108 are mixed in the mixing valve 403 and enter the radiation end, so that T2>T1. In this state, if T2<T1 is still detected, the system enters state 3 mode.

[0065] State three: close the second flow valve 107, open the third flow valve 108 and the first flow valve 109, the cold water at the outlet of the heat exchanger passes through the first flow valve 109 and the return water at the radiation end through the third flow valve 108, and then enters the radiation end after being mixed in the 403 temperature control mixing valve, so that T2>T1.

[0066] The above control process can be completed by a controller. In some examples, it can also be completed by controlling the second flow valve 107 and opening the third flow valve 108 and the first flow valve 109 through a temperature-controlled mixing valve.

[0067] When the radiant air conditioner of the embodiment of the present application further includes a water pump 406 , the water pump 406 is started when the third flow valve 108 is opened, and is stopped when the third flow valve 108 is closed.

[0068] (II) The working process of the water system in the radiation terminal of the radiant air conditioner of the embodiment of the present application is as follows:

[0069] When the radiation air conditioner enters the operating state, the chilled water of the water inlet pipe of the radiation terminal 20 circulates through the water inlet branch pipe 2041 and the water outlet branch pipe 2042 of the radiation terminal unit 204 and then is collected in the radiation terminal return pipe, wherein the return pipe of the radiation terminal 20 includes the return branch pipe 2043 located in each radiation terminal unit 204. The radiation terminal return pipe collects the circulating water of the water inlet branch pipe 2041 and the water outlet branch pipe 2042 of the radiation terminal unit 204 and then enters the shell of the radiation terminal unit. In the shell of the radiation terminal unit 204: the return water temperature of the radiation terminal return branch pipe 2043 is higher than the circulating water temperature of the inlet branch pipe 2041 and the outlet branch pipe 2042 of the radiation terminal unit 204; the return pipe of the radiation terminal 20 and the inlet branch pipe 2041 and the outlet branch pipe 2042 of the radiation terminal unit 204 jointly control the shell temperature of the radiation terminal unit 204 to ensure that the shell surface temperature is greater than the dew point temperature of the air entering the radiation terminal, and at the same time control the surface temperature of the entire radiation terminal to be uniform, avoiding uneven cold radiation surface on the lower surface of the ceiling cavity.

[0070] (III) The working process of the wind system of the radiant air conditioner in the embodiment of the present application is as follows:

[0071] The lower surface of the radiation terminal 20 in the ceiling cavity contacts the ceiling of the room for radiation heat exchange. The air dehumidified by the heat exchange dehumidification device enters the shell of the radiation terminal through the connecting air duct 30, exchanges heat with the upper surface of the radiation terminal 20, and is discharged into the room through the ceiling cavity radiation terminal outlet 201.

[0072] The radiant air conditioner of the embodiment of the present application can achieve the following technical effects:

[0073] 1. The present invention processes indoor air through the designed pre-dehumidification heat exchanger, the independently temperature-controlled water mixing valve and the radiation terminal, reduces the air humidity and avoids condensation when the air contacts the radiation terminal.

[0074] 2. Independent temperature control method optimizes the supply and return water temperature of the radiation terminal, ensuring the normal operation of the radiation terminal while meeting the dehumidification needs.

[0075] 3. The dehumidification temperature of the pre-dehumidification heat exchanger is independently controlled by the temperature and humidity sensor. Compared with the traditional dehumidification device, the required chilled water temperature is higher, which reduces the air conditioning dehumidification load and improves the energy saving of the system.

[0076] 4. Through the designed radiation terminal water supply and return structure, the temperature of the entire radiation terminal unit module is controlled to be uniform, avoiding uneven temperature of the cold radiation surface under the ceiling cavity.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A radiant air conditioner, characterized in that: include: A controller, a heat exchange and dehumidification device, a water inlet pipe, a water return pipe, a first flow valve, a second flow valve, a third flow valve, a water mixing valve, a temperature sensor and a radiation terminal; The water inlet of the heat exchange and dehumidification device is connected to the water inlet pipe, and the water outlet of the heat exchange and dehumidification device is connected to the water mixing valve through the first flow valve; The mixing valve is also connected to the water inlet pipe through the second flow valve, and is connected to the water return pipe through the third flow valve; The water inlet of the radiation end is connected to the mixing valve, and the water return port of the radiation end is connected to the water return pipe; The temperature sensor is used to detect the temperature of the pipe between the water inlet of the radiation end and the mixing valve; The controller is respectively connected to the first flow valve, the second flow valve, the third flow valve and the temperature sensor; The radiation terminal includes a plurality of radiation terminal units arranged mutually, and each of the radiation terminal units includes a water inlet branch pipe, a water outlet branch pipe and a water return branch pipe; For each of the radiation terminal units, one end of its water inlet branch pipe is connected to the water mixing valve channel, and the other end is connected to one end of its water outlet branch pipe, and the other ends of each of the water outlet branch pipes are connected to each other; After the return water branch pipe of each radiation terminal unit is connected end to end, one end is connected to the outlet water branch pipe of each radiation terminal unit, and the other end is connected to the return water pipe, so as to collect the condensed water of each outlet water branch pipe and discharge it to the return water pipe.

2. The radiant air conditioner according to claim 1, characterized in that: When the temperature detected by the temperature sensor is higher than the dew point temperature of the air on the air inlet side of the radiation terminal, the controller controls the first flow valve and the second flow valve to open.

3. The radiant air conditioner according to claim 2, characterized in that: When the temperature detected by the temperature sensor is lower than the air dew point temperature on the air inlet side of the radiation terminal, the controller controls the first flow valve, the second flow valve and the third flow valve to open.

4. The radiant air conditioner according to claim 3, characterized in that: When the temperature detected by the temperature sensor is lower than the air dew point temperature on the air inlet side of the radiation end, and when the first flow valve, the second flow valve and the third flow valve are all in an open state, the controller closes the second flow valve.

5. The radiant air conditioner according to claim 1, characterized in that: For each of the radiation terminal units, the water inlet branch pipe and the water outlet branch pipe are arranged on both sides of the water return branch pipe.

6. The radiant air conditioner according to any one of claims 1 to 5, characterized in that: The heat exchange and dehumidification device is arranged in a first shell, and the radiation terminal is arranged in a second shell. The first shell is provided with an air inlet, and the second shell is provided with an air outlet. The first shell and the second shell are connected by a connecting air duct.

7. The radiant air conditioner according to claim 6, characterized in that: An air flow channel connecting the air duct and the air outlet is formed between one side of the radiation end and the second shell.

8. The radiant air conditioner according to claim 6, characterized in that: The heat exchange and dehumidification device includes a fan and a heat exchanger. The fan is connected to the controller and is used to generate an airflow from the air inlet through the heat exchanger to the connecting air duct.

9. The radiant air conditioner according to claim 5, characterized in that: It also includes a temperature and humidity detection device, which is connected to the controller and is used to detect the dew point temperature of the air on the air inlet side of the radiation end.

10. The radiant air conditioner according to claim 5, characterized in that: It also includes a water pump, which is arranged between the third flow valve and the return water pipe.

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