Constant-temperature and constant-humidity ground temperature adjusting type air conditioner indoor system

Abstract

The invention discloses a constant-temperature and constant-humidity ground temperature adjusting type air conditioner indoor system which is used for being matched with a heat pump main machine serving as an outdoor unit part. The air conditioner module and the floor heating module are arranged in parallel; the air conditioner module comprises an indoor unit. Pipelines of a refrigerant inlet and a refrigerant outlet of the indoor unit are respectively provided with a first expansion valve and a first flow regulating valve; the floor heating module comprises a floor heating heat exchanger; pipelines of a refrigerant inlet and a refrigerant outlet of the floor heating heat exchanger are respectively provided with a second expansion valve and a second flow regulating valve; a refrigerant inlet pipeline of the indoor unit and a refrigerant inlet pipeline of the floor heating heat exchanger are connected to the first main pipeline. A refrigerant outlet pipeline of the indoor unit and a refrigerant outlet pipeline of the floor heating heat exchanger are connected to the second main pipeline. The indoor air temperature and the indoor air relative humidity can be rapidly and accurately controlled, and dew condensation cannot occur indoors when floor heating is used for refrigeration.

Description

Technical Field

[0001] The present invention relates to the technical field of indoor air-conditioning systems, and in particular to a constant temperature and humidity floor temperature-regulating indoor air-conditioning system. Background Art

[0002] As people's demand for air comfort increases, air conditioners are increasingly used in our daily lives. As a device that regulates the air environment, air conditioners' core mission is to improve indoor (or specific space) comfort and meet air conditioning needs in different scenarios through a variety of functions.

[0003] At present, existing floor heating systems generally use radiation heat transfer, that is, the ground temperature must first be heated to a temperature higher than the set indoor air temperature, and then the heat is transferred to the indoor air through the ground. This heating method has a slow heating rate for the indoor air and cannot achieve instant heating of the indoor air. Moreover, when using the ground for cooling, the ground temperature must be cooled to a temperature lower than the set indoor air temperature, and then the heat of the indoor air is transferred to the refrigerant through the ground, but this can easily cause condensation on the ground.

[0004] In response to this, multi-split air conditioning systems, consisting of floor heating modules and air conditioning modules, have emerged on the market. However, current multi-split air conditioning systems also have some shortcomings 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. Summary of the Invention

[0005] In response to the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a constant temperature and humidity floor temperature-regulating air-conditioning indoor system, which includes an indoor unit of an air-conditioning module and a floor heating heat exchanger of 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 temperature and relative humidity of the indoor air can be achieved, and the temperature and relative humidity of the indoor air 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] In order to achieve the above object, the technical solution of the present invention is:

[0007] A constant temperature and humidity floor-controlled air conditioning indoor system is used to cooperate with a heat pump main unit as an outdoor unit. The constant temperature and humidity floor-controlled air conditioning indoor system includes an air conditioning module and a floor heating module arranged in parallel. The air conditioning module can be mounted above the indoor floor and can be used to introduce supercritical carbon dioxide as a refrigerant to control the temperature and relative humidity of the indoor air. The floor heating module can be installed in the indoor floor and can be used to introduce 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 provided 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 provided 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 the first main pipe for the inflow of carbon dioxide; the refrigerant outlet pipe of the indoor unit and the refrigerant outlet pipe of the floor heating heat exchanger are respectively connected to the second main pipe for the outflow of carbon dioxide; during heating, carbon dioxide enters the indoor unit and the floor heating heat exchanger respectively through the fully opened first expansion valve and the fully opened second expansion valve; the air outlet of the indoor unit can be adjusted by adjusting the first flow regulating valve. the air temperature at the place; by adjusting the second flow regulating valve, the ground 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 floor heating heat exchanger through the first expansion valve and the second expansion valve respectively, and 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 the carbon dioxide at the refrigerant outlet of the indoor unit is maintained at the dew point temperature of the indoor air calculated according to 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 floor heating heat exchanger to cool the ground by absorbing the heat from the ground to achieve bottom surface cooling, and at the same time keep the ground temperature higher than the set indoor air temperature.

[0008] Furthermore, a remote controller is included as a control module. The remote controller can be used to set the indoor air temperature, relative humidity, and floor temperature of the air conditioning module and the floor heating module during heating and cooling, switch between cooling and heating modes, and start and stop the indoor unit and the floor heating heat exchanger. This configuration allows convenient control of various functions using the remote controller.

[0009] Furthermore, during heating and cooling, the floor temperature is set at 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 the present invention are:

[0012] The present invention can achieve precise control of the temperature and relative humidity of indoor air, as well as rapid realization of the set temperature and set relative humidity of indoor air through the air conditioning module and the floor heating module. It can also control the ground temperature, and the ground temperature is higher than the indoor air temperature so that there is no condensation when the ground is cooled.

[0013] In addition, when heating, the air outlet temperature at the indoor unit can be accurately controlled by adjusting the first flow regulating valve; and the ground temperature can be maintained at the set value by adjusting the second flow regulating valve.

[0014] At the same time, during cooling, by adjusting the first expansion valve, the temperature of the carbon dioxide at the refrigerant outlet of the indoor unit can be maintained at the dew point temperature of the indoor air calculated according to the set indoor air temperature and the set indoor relative humidity, thereby achieving control of the air outlet temperature and relative humidity at the air outlet of the indoor unit; by adjusting the second expansion valve, the ground temperature achieved by the floor heating heat exchanger through heat absorption can always be higher than the set indoor air temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Reference numerals

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

[0018] 2. Floor heating heat exchanger; 21. Second expansion valve; 22. Second flow control valve;

[0019] 3. The first main pipeline;

[0020] 4. Second main pipeline;

[0021] 5. Remote control. DETAILED DESCRIPTION

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

[0023] like Figure 1As shown, a constant temperature and humidity floor temperature control type air-conditioning indoor system is used to cooperate with a heat pump host (not shown) as an outdoor unit; the constant temperature and humidity floor temperature control type air-conditioning indoor system includes an air-conditioning module and a floor heating module arranged in parallel; the air-conditioning module can be used to be hung above the indoor floor, and can be used to introduce supercritical carbon dioxide as a refrigerant to control the temperature and relative humidity of the indoor air; the floor heating module can be used to be installed in the indoor floor, and can be used to introduce supercritical carbon dioxide as a refrigerant to control the floor temperature.

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

[0025] During heating, carbon dioxide enters the indoor unit 1 and the floor heating heat exchanger 2 through the fully opened first expansion valve 11 and the fully opened second expansion valve 21 respectively; by adjusting the first flow regulating valve 12, it can be used to adjust the air temperature at the air outlet of the indoor unit 1 (that is, the temperature of the air discharged from the air outlet); by adjusting the second flow regulating valve 22, the ground temperature achieved by heat exchange in the floor heating heat exchanger 2 can be maintained at the set value. 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 the carbon dioxide at the refrigerant outlet of the indoor unit 1 is maintained at the dew point temperature of the indoor air calculated according to 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 and realize ground cooling by absorbing ground heat, and at the same time keep the ground temperature higher than the set indoor air temperature.

[0026] As can be seen, the present invention, through the air conditioning module and floor heating module, can achieve precise control of indoor air temperature and relative humidity, as well as rapid achievement of the set indoor air temperature and relative humidity. It can also control the floor temperature, ensuring that the floor temperature is higher than the indoor air temperature, thereby preventing condensation during floor cooling. Furthermore, during heating, the first flow control valve 12 can be adjusted to accurately control the outlet air temperature of the indoor unit; the second flow control valve 22 can be adjusted to maintain the floor temperature at the set value. Simultaneously, during cooling, the first expansion valve 11 can be adjusted to maintain the temperature of the carbon dioxide 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, thereby controlling the outlet air temperature and relative humidity of the indoor unit 1. Adjusting the second expansion valve 21 ensures that the floor temperature, achieved by heat absorption by the floor heating heat exchanger 2, remains higher than the set indoor air temperature.

[0027] This constant temperature and humidity floor-controlled air conditioning indoor system also includes a remote control 5 as a control module. This remote control 5 can be used to set the indoor air temperature, relative humidity, and floor temperature for the air conditioning and floor heating modules during heating and cooling, switch between cooling and heating modes, and start and stop the indoor unit 1 and floor heating heat exchanger 2. Therefore, the remote control 5 facilitates control of various functions. Since the remote control 5 is a common feature and the aforementioned functions are prior art, they will not be further elaborated upon here.

[0028] Preferably, during heating and cooling, the floor temperature is set 1-6°C higher than the indoor air temperature. This means that when the floor heat exchanger 2 controls the floor temperature, the floor temperature is always higher than the indoor air temperature. With this design, during heating, since the floor temperature is higher than the indoor air temperature, the floor temperature can still effectively transfer heat to the indoor air even after the indoor unit 1 is shut down. Furthermore, during cooling, since the floor temperature is also higher than the indoor air temperature, condensation is prevented on the floor.

[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 arranged on the refrigerant inlet and refrigerant outlet pipes of the fan coil unit.

[0031] During operation, the remote control 5 can be used to simultaneously turn on the indoor unit 1 and the floor heating heat exchanger 2. During heating, the indoor unit 1 can heat the indoor air, while the floor heating heat exchanger 2 heats the floor. Since the indoor unit 1 is primarily used to heat the indoor air to the set temperature, the indoor air reaches the set temperature quickly. After the indoor unit 1 has operated for a period of time, it can be turned off, and the floor heating heat exchanger 2 continues to heat the floor to maintain the indoor air temperature. Alternatively, the indoor unit 1 can be left off, while the floor heating heat exchanger 2 can be turned off and the indoor unit 1 can be used to maintain the indoor air temperature, or both the indoor unit 1 and the floor heating heat exchanger 2 can be operated simultaneously. During cooling, the indoor unit 1 can be operated alone or simultaneously. However, the floor heating heat exchanger 2 cannot be operated alone to prevent condensation in the indoor air.

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

[0033] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications of the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the scope of the claims of the present invention and equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A constant temperature and humidity floor temperature control type indoor air conditioning system, which is used to cooperate with a heat pump host as an outdoor unit, characterized by: The constant temperature and humidity floor temperature control type air-conditioning indoor system includes an air-conditioning module and a floor heating module arranged in parallel; the air-conditioning module can be mounted on the floor of a room, and can be used to introduce supercritical carbon dioxide as a refrigerant to control the temperature and relative humidity of the indoor air; the floor heating module can be mounted on the floor of a room, and can be used to introduce 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 provided 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 provided 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 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 for carbon dioxide outflow; During heating, carbon dioxide enters the indoor unit and the floor heating heat exchanger through the fully opened first expansion valve and the fully opened 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 heat exchange in the floor heating heat exchanger can be maintained at a set value. During cooling, carbon dioxide enters the indoor unit and the floor heating heat exchanger through the first expansion valve and the second expansion valve respectively, and 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 the carbon dioxide at the refrigerant outlet of the indoor unit is maintained at the dew point temperature of the indoor air calculated according to 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 floor heating heat exchanger to cool the ground and achieve floor cooling by absorbing ground heat, and at the same time keep the ground temperature higher than the set indoor air temperature.

2. The constant temperature and humidity floor temperature regulating air conditioning indoor system according to claim 1, characterized in that: Also included is a remote controller serving 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 floor heating module during heating and cooling, switch between cooling mode and heating mode, and start and stop the indoor unit and the floor heating heat exchanger.

3. The constant temperature and humidity floor temperature regulating air conditioning indoor system according to claim 1, characterized in that: During heating and cooling, the floor temperature is set 1-6°C above the indoor air temperature.

4. The constant temperature and humidity floor temperature regulating 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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