A constant temperature and humidity ground temperature regulating type air conditioning indoor system

Abstract

The utility model discloses a constant temperature and humidity ground temperature regulating type air conditioning indoor system, it is used for cooperating with as outdoor unit part's heat pump host computer, still including the parallelly connected air conditioning module and floor heating module, air conditioning module includes indoor unit, and the pipeline of refrigerant inlet and refrigerant outlet of indoor unit is equipped with first expansion valve and first flow regulating valve respectively, floor heating module includes floor heating heat exchanger, and the pipeline of refrigerant inlet and refrigerant outlet of floor heating heat exchanger is equipped with second expansion valve and second flow regulating valve respectively, and the refrigerant inlet pipeline of indoor unit and the refrigerant inlet pipeline of floor heating heat exchanger are connected on first main pipeline respectively, and the refrigerant outlet pipeline of indoor unit and the refrigerant outlet pipeline of floor heating heat exchanger are connected on second main pipeline respectively. The utility model can realize the quick accurate control of indoor air temperature and indoor air relative humidity, and indoor will not appear dewing when using floor heating refrigeration.

Description

Technical Field

[0001] This utility model relates to the technical field of air conditioning indoor systems, specifically to a constant temperature and humidity floor-mounted temperature-regulating air conditioning indoor system. Background Technology

[0002] As people's demands for air comfort increase, air conditioners are being used more and more in people's daily lives. As a device for regulating the air environment, the core mission of air conditioners is to improve the comfort of indoor (or specific spaces) and to meet the air conditioning needs of different scenarios through a variety of functions.

[0003] Currently, existing underfloor heating systems generally use radiative heat transfer, which means that the floor temperature must first be heated to a level higher than the set indoor air temperature before the heat is transferred to the indoor air through the floor. This heating method results in a slow indoor air temperature rise and cannot provide instant heating. Moreover, when using floor cooling, the floor temperature must be lowered to a level lower than the set indoor air temperature before the heat is transferred to the refrigerant through the floor, which can easily cause condensation on the floor.

[0004] In light of this, multi-split air conditioning systems combining underfloor heating and air conditioning modules have emerged on the market. However, current multi-split air conditioning systems also have some drawbacks during use. For example, during cooling, they cannot accurately control the indoor air temperature and relative humidity. The main reason is that existing air conditioning systems control the return air temperature of the indoor unit, and cannot accurately control the outlet air temperature and relative humidity at the indoor unit's air outlet. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a constant temperature and humidity floor-mounted air conditioning indoor system, which includes an indoor unit with an air conditioning module and a floor heating heat exchanger with a floor heating module. By controlling the temperature and dew point of the air discharged from the air outlet of the indoor unit, precise control of the indoor air temperature and relative humidity can be achieved, and the indoor air temperature and relative humidity can be quickly brought to the set values. In addition, the floor heating module can be used to control the floor temperature to be higher than the indoor temperature, so that condensation will not occur indoors.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A constant temperature and humidity floor-mounted air conditioning indoor system is disclosed, which is used in conjunction with a heat pump unit that serves as the outdoor unit. The system includes an air conditioning module and a floor heating module connected in parallel. The air conditioning module can be mounted above the floor and can be circulated with supercritical carbon dioxide as a refrigerant to control the temperature and relative humidity of the indoor air. The floor heating module can be installed inside the floor and can be circulated with supercritical carbon dioxide as a refrigerant to control the floor temperature. The air conditioning module includes an indoor unit; a first expansion valve and a first flow regulating valve are respectively installed on the refrigerant inlet and refrigerant outlet pipes of the indoor unit; the floor heating module includes a floor heating heat exchanger; a second expansion valve and a second flow regulating valve are respectively installed on the refrigerant inlet and refrigerant outlet pipes of the floor heating heat exchanger; the refrigerant inlet pipes of the indoor unit and the floor heating heat exchanger are respectively connected to a first main pipe for carbon dioxide inflow; the refrigerant outlet pipes of the indoor unit and the floor heating heat exchanger are respectively connected to a second main pipe for carbon dioxide outflow; during heating, carbon dioxide enters the indoor unit and the floor heating heat exchanger through the fully open first expansion valve and the fully open second expansion valve, respectively; by adjusting the first flow regulating valve, the air outlet of the indoor unit can be adjusted. The air temperature at the location; by adjusting the second flow regulating valve, the floor temperature achieved by the underfloor heating heat exchanger through heat exchange can be maintained at a set value; during cooling, carbon dioxide enters the indoor unit and the underfloor heating heat exchanger through the first expansion valve and the second expansion valve respectively, at which time the first flow regulating valve and the second flow regulating valve are fully open; by adjusting the first expansion valve, the temperature of carbon dioxide at the refrigerant outlet of the indoor unit is maintained at the dew point temperature of the indoor air calculated based on the set indoor air temperature and the set indoor relative humidity, so as to control the air temperature and relative humidity at the air outlet of the indoor unit; adjusting the second expansion valve can be used to control the underfloor heating heat exchanger to cool the floor by absorbing heat from the floor, and at the same time keep the floor temperature higher than the set indoor air temperature.

[0008] Furthermore, it also includes a remote control as a control module; the remote control can be used to set the indoor air temperature, relative humidity, and floor temperature of the air conditioning module and the underfloor heating module during heating and cooling, switch between cooling and heating modes, and turn the indoor unit and the underfloor heating heat exchanger on and off. These features allow for convenient control of various functions using the remote control.

[0009] Furthermore, during the heating and cooling process, the floor temperature is set 1-6°C higher than the indoor air temperature.

[0010] Furthermore, the first flow regulating valve, the second flow regulating valve, the first expansion valve, and the second expansion valve are all electric proportional valves.

[0011] The beneficial effects of this utility model are as follows:

[0012] This invention enables precise control of indoor air temperature and relative humidity through an air conditioning module and a floor heating module, as well as the rapid achievement of set indoor air temperature and relative humidity. It can also control the floor temperature, and the floor temperature is higher than the indoor air temperature, so there is no condensation when the floor is cooled.

[0013] In addition, when heating, it can accurately control the air outlet temperature of the indoor unit by adjusting the first flow regulating valve; and the floor temperature can be kept at the set value by adjusting the second flow regulating valve.

[0014] Meanwhile, during cooling, by adjusting the first expansion valve, the temperature of carbon dioxide at the refrigerant outlet of the indoor unit can be maintained at the dew point temperature of the indoor air calculated based on the set indoor air temperature and the set indoor relative humidity, thereby controlling the outlet air temperature and relative humidity at the air outlet of the indoor unit; by adjusting the second expansion valve, the floor temperature achieved by the underfloor heating heat exchanger through heat absorption can always be higher than the set indoor air temperature. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure Labels

[0017] 1. Indoor unit; 11. First expansion valve; 12. First flow regulating valve;

[0018] 2. Underfloor heating heat exchanger; 21. Second expansion valve; 22. Second flow regulating valve;

[0019] 3. First main pipeline;

[0020] 4. Second main pipeline;

[0021] 5. Remote control. Detailed Implementation

[0022] The utility model will be further described below with reference to the accompanying drawings and specific embodiments. The following description is merely exemplary and does not limit the scope of protection of the utility model.

[0023] like Figure 1As shown, a constant temperature and humidity floor-mounted air conditioning indoor system is used in conjunction with a heat pump unit (not shown) that serves as the outdoor unit. This system includes an air conditioning module and a floor heating module connected in parallel. The air conditioning module can be mounted above the floor and can be circulated with supercritical carbon dioxide as a refrigerant to control the indoor air temperature and relative humidity. The floor heating module can be installed inside the floor and can be circulated with supercritical carbon dioxide as a refrigerant to control the floor temperature.

[0024] The air conditioning module includes an indoor unit 1; a first expansion valve 11 and a first flow regulating valve 12 are respectively installed on the refrigerant inlet and refrigerant outlet pipes of the indoor unit 1; the underfloor heating module includes an underfloor heating heat exchanger 2; a second expansion valve 21 and a second flow regulating valve 22 are respectively installed on the refrigerant inlet and refrigerant outlet pipes of the underfloor heating heat exchanger 2; the refrigerant inlet pipes of the indoor unit 1 and the underfloor heating heat exchanger 2 are respectively connected to a first main pipe 3 used for carbon dioxide inflow; the refrigerant outlet pipes of the indoor unit 1 and the underfloor heating heat exchanger 2 are respectively connected to a second main pipe 4 used for carbon dioxide outflow.

[0025] During heating, carbon dioxide enters the indoor unit 1 and the floor heating heat exchanger 2 through the fully open first expansion valve 11 and the fully open second expansion valve 21, respectively. The air temperature at the air outlet of the indoor unit 1 (i.e., the temperature of the air discharged from the air outlet) can be adjusted by regulating the first flow regulating valve 12. The floor temperature achieved by the floor heating heat exchanger 2 through heat exchange can be maintained at the set value by regulating the second flow regulating valve 22. During cooling, carbon dioxide enters the indoor unit 1 and the floor heating heat exchanger 2 through the first expansion valve 11 and the second expansion valve 21 respectively. At this time, the first flow regulating valve 12 and the second flow regulating valve 22 are fully open. By adjusting the first expansion valve 11, the temperature of carbon dioxide at the refrigerant outlet of the indoor unit 1 is maintained at the dew point temperature of the indoor air calculated based on the set indoor air temperature and the set indoor relative humidity, so as to control the air temperature and relative humidity at the air outlet of the indoor unit 1. Adjusting the second expansion valve 21 can be used to control the floor heating heat exchanger 2 to cool the ground by absorbing heat from the ground and achieve floor cooling, while at the same time keeping the ground temperature higher than the set indoor air temperature.

[0026] Therefore, this utility model, through its air conditioning module and floor heating module, can achieve precise control of indoor air temperature and relative humidity, as well as rapid achievement of set indoor air temperature and relative humidity. It can also control floor temperature, ensuring that the floor temperature is higher than the indoor air temperature, preventing condensation during floor cooling. Furthermore, during heating, the outlet air temperature of the indoor unit can be accurately controlled by adjusting the first flow regulating valve 12; the floor temperature can be maintained at the set value by adjusting the second flow regulating valve 22. Simultaneously, during cooling, the carbon dioxide temperature at the refrigerant outlet of the indoor unit 1 can be maintained at the dew point temperature of the indoor air calculated based on the set indoor air temperature and relative humidity by adjusting the first expansion valve 11, thereby controlling the outlet air temperature and relative humidity of the indoor unit 1; the floor temperature achieved by the floor heating heat exchanger 2 through heat absorption is always higher than the set indoor air temperature by adjusting the second expansion valve 21.

[0027] This constant temperature and humidity floor-mounted air conditioning indoor system also includes a remote control 5 as a control module. The remote control 5 can be used to set the indoor air temperature, relative humidity, and floor temperature during heating and cooling operations of the air conditioning and floor heating modules; switch between cooling and heating modes; and turn the indoor unit 1 and the floor heating heat exchanger 2 on and off. Therefore, the remote control 5 can conveniently control various functions. Since the remote control 5 is a common feature and the above functions are existing technology, they will not be described in detail here.

[0028] Preferably, during heating and cooling processes, the floor temperature is set 1-6°C higher than the indoor air temperature. That is, when the floor heating heat exchanger 2 controls the floor temperature, the floor temperature is always higher than the indoor air temperature. With this design, during heating, because the floor temperature is higher than the indoor air temperature, the floor can still effectively transfer heat to the indoor air even after the indoor unit 1 is turned off midway. Furthermore, during floor cooling, because the floor temperature is also higher than the indoor air temperature, condensation on the floor is prevented.

[0029] In this embodiment, the first flow regulating valve 12, the second flow regulating valve 22, the first expansion valve 11, and the second expansion valve 21 are all electric proportional valves.

[0030] Specifically, the indoor unit 1 includes a fan coil unit (not shown in the figure), a circulating fan (not shown in the figure), and a temperature probe (not shown in the figure), etc. The first expansion valve 11 and the first flow regulating valve 12 are respectively installed on the refrigerant inlet and refrigerant outlet pipes of the fan coil unit.

[0031] During use, both indoor unit 1 and the underfloor heating heat exchanger 2 can be turned on simultaneously via remote control 5. In heating mode, indoor unit 1 heats the indoor air, while underfloor heating heat exchanger 2 heats the floor. Since indoor unit 1 primarily heats the indoor air to the set temperature, the temperature is reached quickly. After indoor unit 1 has been operating for a period, it can be turned off, allowing underfloor heating heat exchanger 2 to continue heating the floor and maintain the indoor air temperature. Alternatively, indoor unit 1 can remain on while underfloor heating heat exchanger 2 is off, using indoor unit 1 to maintain the indoor air temperature, or both can operate simultaneously. In cooling mode, indoor unit 1 can operate alone or both can operate simultaneously. However, underfloor heating heat exchanger 2 cannot operate alone to prevent condensation.

[0032] Of course, during heating, the outlet air temperature of the indoor unit 1 can be adjusted by regulating the first flow regulating valve 12; the floor temperature achieved by the floor heating heat exchanger 2 through heat exchange can be maintained at the set value by regulating the second flow regulating valve 22. During cooling, the outlet air temperature and relative humidity of the indoor unit 1 can be adjusted by regulating the first expansion valve 11 to maintain the carbon dioxide temperature at the refrigerant outlet of the indoor unit 1 at the dew point temperature of the indoor air calculated based on the set indoor air temperature and the set indoor relative humidity; the second expansion valve 21 can be used to control the floor temperature achieved by the floor heating heat exchanger 2 through heat absorption to always be higher than the set indoor air temperature.

[0033] This utility model is not limited to the above-described embodiments. If any modifications or variations to this utility model do not depart from the spirit and scope of this utility model, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this utility model, then this utility model also intends to include such modifications and variations.

Claims

1. A constant temperature and humidity ground-level temperature-regulating indoor air conditioning system, used in conjunction with a heat pump unit that serves as the outdoor unit, characterized in that: This constant temperature and humidity floor-mounted air conditioning indoor system includes an air conditioning module and a floor heating module connected in parallel. The air conditioning module can be mounted above the floor and can be circulated with supercritical carbon dioxide as a refrigerant to control the temperature and relative humidity of the indoor air. The floor heating module can be installed inside the floor and can be circulated with supercritical carbon dioxide as a refrigerant to control the floor temperature. The air conditioning module includes an indoor unit; a first expansion valve and a first flow regulating valve are respectively installed on the refrigerant inlet and refrigerant outlet pipes of the indoor unit; the floor heating module includes a floor heating heat exchanger; a second expansion valve and a second flow regulating valve are respectively installed on the refrigerant inlet and refrigerant outlet pipes of the floor heating heat exchanger; the refrigerant inlet pipe of the indoor unit and the refrigerant inlet pipe of the floor heating heat exchanger are respectively connected to a first main pipe used for carbon dioxide inflow; the refrigerant outlet pipe of the indoor unit and the refrigerant outlet pipe of the floor heating heat exchanger are respectively connected to a second main pipe used for carbon dioxide outflow; During heating, carbon dioxide enters the indoor unit and the floor heating heat exchanger through the fully open first expansion valve and the fully open second expansion valve, respectively; by adjusting the first flow regulating valve, the air temperature at the air outlet of the indoor unit can be adjusted; by adjusting the second flow regulating valve, the floor temperature achieved by the floor heating heat exchanger through heat exchange can be maintained at a set value. During cooling, carbon dioxide enters the indoor unit and the underfloor heating heat exchanger through the first expansion valve and the second expansion valve, respectively. At this time, the first flow regulating valve and the second flow regulating valve are fully open. By adjusting the first expansion valve, the temperature of carbon dioxide at the refrigerant outlet of the indoor unit is maintained at the dew point temperature of the indoor air calculated based on the set indoor air temperature and the set indoor relative humidity, so as to control the air temperature and relative humidity at the air outlet of the indoor unit. Adjusting the second expansion valve can be used to control the underfloor heating heat exchanger to cool the ground by absorbing heat from the ground and achieve ground cooling, while at the same time keeping the ground temperature higher than the set indoor air temperature.

2. The constant temperature and humidity floor-mounted air conditioning indoor system according to claim 1, characterized in that: It also includes a remote control that serves as a control module; The remote control can be used to set the indoor air temperature, indoor air relative humidity, and floor temperature when the air conditioning module and the floor heating module are heating and cooling, switch between cooling and heating modes, and turn the indoor unit and the floor heating heat exchanger on and off.

3. The constant temperature and humidity floor-mounted air conditioning indoor system according to claim 1, characterized in that: During heating and cooling processes, the floor temperature is set 1-6℃ higher than the indoor air temperature.

4. The constant temperature and humidity floor-mounted air conditioning indoor system according to claim 1, characterized in that: The first flow regulating valve, the second flow regulating valve, the first expansion valve, and the second expansion valve are all electric proportional valves.

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