Air conditioning unit

Abstract

The utility model provides an air conditioning unit which at least comprises a main module and a reheating module. The main module at least comprises a main module air outlet, a main module air pipe stop valve and a main module liquid pipe stop valve; the reheating module at least comprises a reheating module return air inlet, a reheating module first stop valve and a reheating module second stop valve; the main module air pipe stop valve and the reheating module first stop valve are connected with an outdoor unit; the main module liquid pipe stop valve is connected with the reheating module second stop valve; and the main module air outlet is connected with the reheating module air return port. The independent reheating module design is provided, the reheating function can be achieved under the condition that an original air conditioning unit is not replaced, the operation mode of the original air conditioning unit is reserved, the installation flexibility is high, and the improvement cost is low.

Description

Technical Field

[0001] The utility model relates to air conditioning equipment, in particular to an air conditioning unit, and belongs to the technical field of air conditioning control. Background Art

[0002] The industry usually adopts the method of arranging electric heating at the air outlet of the air conditioner to increase the outlet temperature and reduce the relative humidity to meet the required temperature and humidity requirements indoors, but this method consumes a lot of energy. At present, the condensation reheat technology can also achieve the same function. The condensation reheat technology reuses the waste heat of condensation to achieve the purpose of heating. Not only does it reduce the power consumption of the refrigeration system, it can also reduce the load of electric heating, greatly improving the overall energy efficiency of the system. However, it is difficult and costly to replace old units on the market. Utility Model Content

[0003] In view of this, the utility model provides an air conditioning unit to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0004] The technical solution of the embodiment of the utility model is implemented as follows: an air-conditioning unit, comprising at least a main module and a reheat module; the main module comprises at least a main module air outlet, a main module air pipe stop valve and a main module liquid pipe stop valve; the reheat module comprises at least a reheat module return air outlet, a first reheat module stop valve and a second reheat module stop valve.

[0005] The main module gas pipe stop valve and the first stop valve of the reheat module are connected to the outdoor unit; the main module liquid pipe stop valve is connected to the second stop valve of the reheat module; the main module air outlet is connected to the reheat module return air outlet.

[0006] Further preferably, the air conditioning unit further comprises an air duct; the air duct is connected to the air outlet of the main module and the air return outlet of the reheat module.

[0007] Further preferably, the main module also includes an electric heater, a fan, a one-way throttle valve, an evaporator and a main module return air outlet.

[0008] Further preferably, the reheat module further includes a reheat module air outlet, a reheater, and a solenoid valve.

[0009] Further preferably, the evaporator, the fan and the electric heater are arranged in sequence in the main module according to the air intake direction.

[0010] Further preferred: the main module liquid pipe stop valve and the main module gas pipe stop valve are arranged on the outside of the main module; the reheat module first stop valve and the reheat module second stop valve are arranged on the outside of the reheat module; the main module and the reheat module are also provided with gas pipes and liquid pipes on the outside, respectively.

[0011] Further preferably, one end of the main module air pipe stop valve is connected to the air pipe, and the other end is connected to the evaporator.

[0012] Further preferably, one end of the main module liquid pipe stop valve is connected to the one-way throttle valve, and the other end is connected to the reheat module second stop valve.

[0013] Further preferably, the other end of the one-way throttle valve is connected to the evaporator; the other end of the second stop valve of the reheat module is connected to the solenoid valve.

[0014] Further preferably, the solenoid valve is connected in parallel with the reheater, and is connected together with one end of the reheater to the first stop valve of the reheat module; the other end of the first stop valve of the reheat module is connected to the liquid pipe.

[0015] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0016] The utility model proposes an independent reheat module design, which can realize the reheat function without replacing the original air-conditioning unit, so as to retain the operation mode of the original air-conditioning unit, has high installation flexibility and low transformation cost.

[0017] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural diagram of the utility model.

[0020] Figure 2 The figure is a connection diagram of an air conditioning unit and an outdoor unit in the prior art.

[0021] Figure markings: 100-main module, 101-main module liquid pipe stop valve, 102-main module gas pipe stop valve, 103-main module air outlet, 104-electric heater, 105-fan, 106-one-way throttle valve, 107-evaporator, 108-main module return air outlet, 200-reheat module, 201-reheat module air outlet, 202-reheater, 203-solenoid valve, 204-reheat module first stop valve, 205-reheat module second stop valve, 206-reheat module return air outlet, 300-air duct. DETAILED DESCRIPTION

[0022] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0023] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, an embodiment of the utility model provides an air-conditioning unit, comprising at least a main module 100 and a reheat module 200; the main module 100 comprises at least a main module air outlet 103, a main module air pipe stop valve 102 and a main module liquid pipe stop valve 101; the reheat module 200 comprises at least a reheat module return air outlet 206, a reheat module first stop valve 204 and a reheat module second stop valve 205.

[0025] The main module gas pipe stop valve 102 and the reheat module first stop valve 204 are connected to the outdoor unit; the main module liquid pipe stop valve 101 is connected to the reheat module second stop valve 205; the main module air outlet 103 is connected to the reheat module return air outlet 206.

[0026] Among them, the main module 100 and the reheat module 200 have independent pipeline interfaces. During the transformation, the refrigerant side only needs to replace the liquid pipe from the main module liquid pipe stop valve 101 to the reheat module first stop valve 204, and then connect the reheat module second stop valve 205 to the liquid pipe stop valve of the main module 100. That is, the original connection method is that the main module liquid pipe stop valve 101 and the main module gas pipe stop valve 102 are connected to the stop valve of the outdoor unit. Figure 2 .

[0027] In this embodiment, specifically: the air conditioning unit further includes an air duct; the air duct is connected to the main module air outlet 103 and the reheat module return air outlet 206 .

[0028] In this embodiment, specifically: the main module 100 further includes an electric heater 104 , a fan 105 , a one-way throttle valve 106 , an evaporator 107 and a main module return air port 108 .

[0029] In this embodiment, specifically: the reheat module 200 further includes a reheat module air outlet 201 , a reheater 202 , and a solenoid valve 203 .

[0030] In this embodiment, specifically: the evaporator 107, the fan 105 and the electric heater 104 are arranged in sequence in the main module 100 according to the air intake direction.

[0031] In this embodiment, specifically: the main module liquid pipe stop valve 101 and the main module gas pipe stop valve 102 are arranged on the outside of the main module 100; the reheat module first stop valve 204 and the reheat module second stop valve 205 are arranged on the outside of the reheat module 200; and gas pipes and liquid pipes are also respectively arranged on the outside of the main module 100 and the reheat module 200.

[0032] In this embodiment, specifically: one end of the main module gas pipe stop valve 102 is connected to the gas pipe, and the other end is connected to the evaporator 107 .

[0033] In this embodiment, specifically: one end of the main module liquid pipe stop valve 101 is connected to the one-way throttle valve 106, and the other end is connected to the reheat module second stop valve 205.

[0034] In this embodiment, specifically: the other end of the one-way throttle valve 106 is connected to the evaporator 107 ; the other end of the reheat module second stop valve 205 is connected to the solenoid valve 203 .

[0035] In this embodiment, specifically: the solenoid valve 203 is connected in parallel with the reheater 202, and is connected to the reheat module first stop valve 204 together with one end of the reheater 202; the other end of the reheat module first stop valve 204 is connected to the liquid pipe.

[0036] Among them, the functions that can be realized by the air-conditioning unit without the reheat module 200 include cooling mode only and reheat mode; when in cooling mode only, only the evaporator 107 works and the electric heater 104 is in the off state; when in reheat mode, the evaporator 107 and the electric heater 104 work at the same time.

[0037] However, for this air-conditioning unit that does not have a reheating function with a reheating module 200, the use of the electric heater 104 in the reheating mode will increase energy consumption, resulting in a decrease in energy efficiency, increased energy consumption and costs; and it cannot meet the requirements for precise control of air temperature and humidity under certain special environmental conditions, reducing the operational flexibility and applicability of the air-conditioning unit.

[0038] When the utility model is working, four modes can be realized, namely, a single cooling mode, a first reheating mode, a second reheating mode, a third reheating mode and a fourth reheating mode.

[0039] Among them, single cooling mode: only the evaporator 107 works, the reheater 202 and the electric heater 104 are closed, and the solenoid valve 203 is opened; the first reheat mode: the evaporator 107 and the reheater 202 work at the same time, the electric heater 104 and the solenoid valve 203 are closed; the second reheat mode: the evaporator 107 and the electric heater 104 work, the reheater 202 is closed, and the solenoid valve 203 is opened; the fourth reheat mode: the evaporator 107, the reheater 202, and the electric heater 104 work at the same time, and the solenoid valve 203 is closed.

[0040] Specific:

[0041] Single cooling mode: When high temperature and high humidity are required, strong cooling is required, and reheating is not required. At this time, the unit operates in single cooling mode, and the solenoid valve 203 is open and in a full-pass state. Due to the large resistance of the reheater 202, most of the refrigerant passes through the solenoid valve 203, and the amount of circulating refrigerant in the reheater 202 is extremely low and can be ignored. The electric heater 104 does not work, and the fan 105 works and runs at a preset speed. The high-temperature and high-pressure refrigerant passes through the solenoid valve 203 and enters the one-way throttle valve 106, where it is throttled and reduced to a low-temperature and low-pressure refrigerant that enters the evaporator 107 for evaporation and heat absorption, and heat exchange with the air to cool and dehumidify the air. After that, the refrigerant returns to the outdoor unit from the main module gas pipe stop valve 102.

[0042] First reheat mode: When the indoor temperature and humidity need to be controlled, and the refrigerant has sufficient residual heat, the solenoid valve 203 turns off different refrigerants, the reheater 202 turns on, the electric heater 104 turns off to save energy, and the fan 105 turns on and runs at a preset speed. The high-temperature and high-pressure refrigerant from the outdoor unit enters the reheater 202 through the first stop valve 204 of the reheat module to exchange heat with the low-temperature air and heat the air. The supercooled high-pressure refrigerant passes through the one-way throttle valve 106 to become a low-temperature and low-pressure refrigerant and enters the evaporator 107 to exchange heat with the air, cooling and dehumidifying the air. After that, the refrigerant returns to the outdoor unit through the main module gas pipe stop valve 102. The air passes through the evaporator 107 and becomes a low-temperature and high-humidity state. After passing through the reheater 202, the temperature rises and the relative humidity decreases, becoming a medium-temperature and low-humidity state, and then is sent indoors.

[0043] Second reheat mode: When the indoor temperature and humidity need to be controlled, but the outdoor ambient temperature is low, in order to maintain the stable operation of the system, the refrigerant cannot provide waste heat. At this time, the reheater 202 needs to be closed, the solenoid valve 203 is opened, and the electric heater 104 is turned on. The rest of the working principle is the same as that in the single cooling mode. After being cooled and dehumidified by the evaporator 107, the air becomes a low temperature and high relative humidity state, and then is heated by the electric heater 104. After the temperature rises, it becomes medium temperature and low relative humidity air and is sent into the room.

[0044] The third reheat mode: When the indoor temperature and humidity need to be controlled, and the refrigerant waste heat is insufficient to raise the air temperature to the target temperature, the electric heater 104 is turned on to supplement some heat, which can still save energy. Close the solenoid valve 203 to switch off the refrigerant, turn on the electric heater 104, and turn on the fan 105 to run at a preset speed. The principle on the refrigerant side is the same as the first reheat mode. The difference is that the air is first heated by the electric heater 104, and then heated again by the reheater 202 to finally reach the target temperature.

[0045] It should be noted that the rotation speed of the fan 105 is not limited here, and those skilled in the art can make an adaptive selection according to actual application requirements.

[0046] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An air conditioning unit, comprising at least a main module, characterized in that: Also included is a reheat module; The main module at least includes a main module air outlet, a main module gas pipe stop valve and a main module liquid pipe stop valve; the reheat module at least includes a reheat module return air outlet, a reheat module first stop valve and a reheat module second stop valve; The main module gas pipe stop valve and the first stop valve of the reheat module are connected to the outdoor unit; the main module liquid pipe stop valve is connected to the second stop valve of the reheat module; the main module air outlet is connected to the reheat module return air outlet.

2. The air conditioning unit according to claim 1, characterized in that: The air conditioning unit further comprises an air duct; the air duct is connected to the air outlet of the main module and the air return outlet of the reheat module.

3. The air conditioning unit according to claim 1, characterized in that: The main module also includes an electric heater, a fan, a one-way throttle valve, an evaporator and a main module return air port.

4. The air conditioning unit according to claim 3, characterized in that: The reheat module also includes a reheat module air outlet, a reheater, and a solenoid valve.

5. The air conditioning unit according to claim 3, characterized in that: The evaporator, the fan and the electric heater are arranged in sequence in the main module according to the air intake direction.

6. The air conditioning unit according to claim 1, characterized in that: The main module liquid pipe stop valve and the main module gas pipe stop valve are arranged outside the main module; The first stop valve of the reheat module and the second stop valve of the reheat module are arranged outside the reheat module; The outsides of the main module and the reheat module are also provided with a gas pipe and a liquid pipe respectively.

7. The air conditioning unit according to claim 3, characterized in that: One end of the main module gas pipe stop valve is connected to the gas pipe, and the other end is connected to the evaporator.

8. The air conditioning unit according to claim 3, characterized in that: One end of the main module liquid pipe stop valve is connected to the one-way throttle valve, and the other end is connected to the second stop valve of the reheat module.

9. The air conditioning unit according to claim 4, characterized in that: The other end of the one-way throttle valve is connected to the evaporator; the other end of the second stop valve of the reheat module is connected to the solenoid valve.

10. The air conditioning unit according to claim 9, characterized in that: The solenoid valve is connected in parallel with the reheater, and is connected to the first stop valve of the reheat module together with one end of the reheater; the other end of the first stop valve of the reheat module is connected to the liquid pipe.

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