Room air conditioner

Abstract

The utility model discloses a room air conditioner, which relates to the technical field of air conditioners, and comprises a fresh air processing unit and an exhaust unit, the fresh air processing unit comprises a first unit box body, and an evaporation coil, a condensation heat recovery coil and an air supply fan assembly which are arranged in the first unit box body; the exhaust unit comprises a second unit box body, and a condenser and an exhaust fan assembly which are arranged in the second unit box body; refrigerants acting through the compressor respectively enter the condensation heat recovery coil pipe and the condenser, flow out of the condensation heat recovery coil pipe and the condenser, are converged and enter the evaporation coil pipe, and flow out of the evaporation coil pipe and are sent back to the compressor of the room air conditioner; the air supply fan assembly is used for forming fresh air; fresh air is fed into a room after being subjected to temperature and / or humidity treatment through the evaporation coil and the condensation heat recovery coil, the exhaust fan assembly is used for forming exhaust air, and the exhaust air is discharged out of the room after being subjected to heat exchange through the condenser. According to the air conditioner, energy consumption can be saved, and meanwhile the operation range of the air conditioner can be widened.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a room air conditioner. Background Art

[0002] At present, the contradiction between economic development and energy supply has become increasingly prominent, and the energy problem is becoming a constraint on the industrialization process, urbanization development and rapid development of the national economy. Therefore, energy conservation and emission reduction have become the basic national policies for realizing national economic security and sustainable development. With the rapid development of the economy, the proportion of energy consumption of air conditioners in the total domestic energy consumption is also increasing day by day.

[0003] In the prior art, an air conditioner uses a cold water coil or an evaporation coil to process fresh air, and then uses electric heating or a hot water coil to heat and adjust the temperature and humidity of the processed air to meet the required constant temperature and humidity requirements. Moreover, the condensation heat generated by the refrigeration system corresponding to the evaporation coil is directly discharged to the outside. The outdoor unit condenser of the air conditioner uses fresh air for heat exchange. In summer, when refrigerating, the outdoor fresh air temperature is high, and the corresponding condensation temperature is high, so the energy consumption is large; in winter, when heating, the outdoor fresh air temperature is low, resulting in a low evaporation temperature, so the heat exchange capacity is small. If the heat released during the condensation heat release process of the refrigerant in the refrigeration cycle can be utilized to heat the processed air, it can not only effectively reduce the electric heating power, improve the energy utilization rate, but also reduce energy consumption and environmental pollution. Summary of the Utility Model

[0004] The utility model aims to solve one of the technical problems in the related technologies to a certain extent. For this purpose, the utility model provides a room air conditioner, which can not only save energy consumption, but also improve the operating range of the air conditioner.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] A room air conditioner includes a fresh air treatment unit and an exhaust fan unit. The fresh air treatment unit includes a first unit box body and an evaporation coil, a condensation heat recovery coil and a supply air fan assembly located in the first unit box body. The exhaust fan unit includes a second unit box body and a condenser and an exhaust air fan assembly located in the second unit box body;

[0007] The refrigerant that has done work through the compressor of the room air conditioner enters the condensation heat recovery coil and the condenser respectively, converges and enters the evaporation coil after flowing out of the condensation heat recovery coil and the condenser, and is sent back to the compressor of the room air conditioner after flowing out of the evaporation coil;

[0008] The air supply fan assembly is used to absorb the air outside the room to form fresh air; the formed fresh air is sent into the room after temperature and / or humidity treatment through the evaporator coil and the condensate heat recovery coil. The exhaust fan assembly is used to absorb the air inside the room to form exhaust air, and the formed exhaust air is discharged from the room after heat exchange through the condenser.

[0009] Optionally, the evaporator coil is connected to the condenser. A heating throttling element assembly and a refrigeration throttling element assembly are arranged on one of the pipelines. The heating throttling element assembly and the refrigeration throttling element assembly are respectively connected in parallel with check valves, and the other pipeline is respectively connected to a four-way reversing valve; the other two ends of the four-way reversing valve are respectively connected to an oil separator and a gas-liquid separator; the condensate heat recovery coil is connected to the condenser. One of the pipelines is connected between the heating throttling element assembly and the refrigeration throttling element assembly, and the other pipeline is connected between the four-way reversing valve and the oil separator, and is provided with a heat recovery throttling element assembly.

[0010] Optionally, the evaporator coil and the condensate heat recovery coil are air-cooled finned coils.

[0011] Optionally, the air supply fan assembly is located at the air outlet of the first unit casing.

[0012] Optionally, the exhaust fan assembly is located at the air outlet of the second unit casing.

[0013] Optionally, the fresh air handling unit further includes a fresh air filter, and the fresh air filter is located at the air inlet of the first unit casing. The fresh air is filtered by the fresh air filter after passing through the air inlet of the first unit casing.

[0014] Optionally, the fresh air handling unit further includes a pretreatment coil. Along the fresh air flow direction, the pretreatment coil is located between the fresh air filter and the evaporator coil or the condensate heat recovery coil to pre-treat the filtered fresh air.

[0015] Optionally, the heat exchange medium of the pretreatment coil is water.

[0016] Optionally, the exhaust fan unit further includes a return air filter, and the return air filter is located at the air inlet of the second unit casing. The exhaust air is filtered by the return air filter after passing through the air inlet of the second unit casing.

[0017] Optionally, the air supply fan assembly, the exhaust fan assembly and the compressor of the room air conditioner are all variable frequency. The fresh air handling unit further includes a control system, and the control system is used to adjust the frequencies of the air supply fan assembly, the exhaust fan assembly and the compressor of the room air conditioner.

[0018] The utility model has the following beneficial effects:

[0019] For the room air conditioner provided by the utility model, when operating in the refrigeration mode, the high-temperature and high-pressure refrigerant enters the condensation heat recovery coil and the condenser simultaneously, realizing the utilization of the indoor low-temperature exhaust air as a cold source, effectively reducing the condensation temperature of the air conditioner, reducing the power consumption of the compressor, and improving the energy efficiency ratio; when operating in the heating mode, the high-temperature and high-pressure refrigerant enters the condensation heat recovery coil and the evaporation coil simultaneously, realizing the utilization of the indoor high-temperature exhaust air as a heat source, effectively increasing the evaporation temperature of the heat pump system, increasing the heat exchange capacity, reducing the frosting temperature, and expanding the operating range of the air conditioner.

[0020] Moreover, by exchanging heat between the pretreatment coil and the fresh air, preliminary cooling in refrigeration or preliminary heating in heating can be achieved, further saving energy. The fresh air and the exhaust air operate independently to avoid cross-contamination.

[0021] These features and advantages of the utility model will be disclosed in detail in the following specific embodiments and the accompanying drawings. The best embodiments or means of the utility model will be shown in detail in combination with the drawings, but it is not a limitation to the technical solution of the utility model. In addition, these features, elements, and components appear multiple times in the following text and drawings, and are marked with different symbols or numbers for convenience of representation, but all represent components with the same or similar structures or functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following further describes the utility model with reference to the accompanying drawings:

[0023] Figure 1 is a schematic diagram of the refrigeration system in the embodiment of the utility model;

[0024] Figure 2 is a schematic diagram of the fresh air treatment unit in the embodiment of the utility model;

[0025] Figure 3 is a schematic diagram of the total exhaust fan unit in the embodiment of the utility model.

[0026] Among them, 1 - fresh air filter, 2 - pretreatment coil, 3 - evaporation coil, 4 - control system, 5 - condensation heat recovery coil, 6 - air supply fan assembly, 7 - first unit housing, 8 - return air filter, 9 - condenser, 10 - exhaust fan assembly, 11 - second unit housing, 9-1 - compressor, 9-2 - oil separator, 9-3 - four-way reversing valve, 9-4 - heating throttling element assembly, 9-5 - gas-liquid separator, 9-6 heat recovery throttling element assembly, 9-7 refrigeration throttling element assembly. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. Based on the embodiments in the embodiments, it is intended to explain the present utility model and should not be construed as a limitation to the present utility model.

[0028] As used in this specification, the phrase "an embodiment" or "an example" or "an instance" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment of the present patent disclosure. The appearances of the phrase "in one embodiment" in various positions in the specification do not necessarily refer to the same embodiment.

[0029] Embodiment:

[0030] This embodiment provides a room air conditioner, which includes a fresh air treatment unit and an exhaust fan unit.

[0031] As Figure 1 shown, the fresh air treatment unit includes a first unit box body 7 and a fresh air filter 1, a pre-treatment coil 2, an evaporator coil 3, a condensation heat recovery coil 5, and a supply air fan assembly 6 located inside the first unit box body 7. The supply air fan assembly 6 is located at the air outlet of the first unit box body 7 and is used to absorb the air outside the room to form fresh air. The fresh air filter 1 is located at the air inlet of the first unit box body 7 and is used to filter the fresh air after the fresh air passes through the air inlet of the first unit box body 7. The pre-treatment coil 2 is located between the fresh air filter 1 and the evaporator coil 3 or the condensation heat recovery coil 5, and its heat exchange medium is water. By providing chilled water or hot water to enter the pre-treatment coil 2 to exchange heat with the fresh air, it is used to pre-treat the fresh air filtered by the fresh air filter 1. Specifically, the pre-treatment coil 2 pre-treats the filtered fresh air in terms of temperature to achieve preliminary cooling for refrigeration or preliminary heating for heating. By exchanging heat between the pre-treatment coil 2 and the fresh air to achieve preliminary cooling for refrigeration or preliminary heating for heating, energy consumption can be further saved. Both the evaporator coil 3 and the condensation heat recovery coil 5 are air-cooled finned coils. In this embodiment, the evaporator coil 3 is before the condensation heat recovery coil 5, and the fresh air first passes through the evaporator coil 3 and then through the condensation heat recovery coil 5. Inside the first unit box body 7, along the direction of fresh air flow, the fresh air sequentially passes through the fresh air filter 1, the pre-treatment coil 2, the evaporator coil 3, and the condensation heat recovery coil 5. In other embodiments, the condensation heat recovery coil 5 can also be before the evaporator coil 3, and the fresh air first passes through the condensation heat recovery coil 5 and then through the evaporator coil 3. Thus, inside the first unit box body 7, along the direction of fresh air flow, the fresh air sequentially passes through the fresh air filter 1, the pre-treatment coil 2, the condensation heat recovery coil 5, and the evaporator coil 3.

[0032] As Figure 2As shown in the figure, the exhaust fan unit includes a second unit housing 11, and an air return filter 8, a condenser 9, and an exhaust fan assembly 10 located inside the second unit housing 11. The exhaust fan assembly 10 is located at the air outlet of the second unit housing 11 and is used to absorb the air in the room to form exhaust air. The air return filter 8 is located at the air inlet of the second unit housing 11 and is used to filter the exhaust air after the exhaust air passes through the air inlet of the second unit housing 11.

[0033] In the room air conditioner provided in this embodiment, the fresh air and the exhaust air operate independently, which can maximize the avoidance of cross-contamination of the air in the room caused by the cross of the fresh air and the exhaust air.

[0034] In this embodiment, the air supply fan assembly 6, the exhaust fan assembly 10, and the compressor 9-1 of the room air conditioner are all variable frequency. The fresh air treatment unit further includes a control system 4. In this embodiment, the control system 4 is a digital control system, which is used to adjust the frequencies of the air supply fan assembly 6, the exhaust fan assembly 10, and the compressor 9-1 of the room air conditioner. The digital control system can intelligently adjust the frequencies of the compressor 9-1 and the fans according to the load demand and the air quality such as fresh air, air supply, and exhaust air, effectively improving the operating energy efficiency of the entire air conditioning system and achieving the purpose of energy saving.

[0035] The refrigeration system of the room air conditioner provided in this embodiment is as Figure 3As shown in the figure, in addition to the evaporator coil 3 and the condensation heat recovery coil 5 located in the fresh air handling unit and the condenser 9 located in the exhaust fan unit, it also includes a compressor 9-1, an oil separator 9-2, a four-way reversing valve 9-3, a heating throttling element assembly 9-4, a gas-liquid separator 9-5, a heat recovery throttling element assembly 9-6, and a refrigeration throttling element assembly 9-7. The refrigeration throttling element assembly 9-7, the heating throttling element assembly 9-4, and the heat recovery throttling element assembly 9-6 are all electronic expansion valves or thermostatic expansion valves. The evaporator coil 3 and the condenser 9 are connected through pipelines. A heating throttling element assembly 9-4 and a refrigeration throttling element assembly 9-7 are arranged on one of the pipelines, and the heating throttling element assembly 9-4 and the refrigeration throttling element assembly 9-7 are respectively connected in parallel with check valves. The other pipeline is respectively connected to the four-way reversing valve 9-3; the other two ends of the four-way reversing valve 9-3 are respectively connected to the oil separator 9-2 and the gas-liquid separator 9-5; the condensation heat recovery coil 5 and the condenser 9 are connected through pipelines. One of the pipelines is connected between the heating throttling element assembly 9-4 and the refrigeration throttling element assembly 9-7 and is provided with a check valve. The other pipeline is connected between the four-way reversing valve 9-3 and the oil separator 9-2 and is provided with a heat recovery throttling element assembly 9-6, and a check valve is also arranged between the oil separator 9-2 and the four-way reversing valve 9-3. The output end of the compressor 9-1 is connected to the input end of the oil separator 9-2, the output end of the oil separator 9-2 is connected to the four-way reversing valve 9-3, the input end of the gas-liquid separator 9-5 is connected to the four-way reversing valve 9-3, and the output end is connected to the compressor 9-1.

[0036] Under the refrigeration condition, the refrigerant forms a high-temperature and high-pressure refrigerant gas after doing work through the compressor 9-1, and then enters the condensation heat recovery coil 5 and the condenser 9 respectively after passing through the oil separator 9-2 and the check valve connected to the output end of the oil separator 9-2. After heat exchange in the condenser 9 and the condensation heat recovery coil 5, the refrigerant flows out from the condensation heat recovery coil 5 through the check valve and flows out from the condenser 9 through the check valve and the heating throttling element assembly 9-4. After converging, it enters the evaporator coil 3 for heat exchange through the refrigeration throttling element assembly 9-7. After heat exchange in the evaporator coil 3, the refrigerant enters the gas-liquid separator 9-5 through the four-way valve, and then is transported to the compressor 9-1 by the gas-liquid separator 9-5. During this process, the fresh air formed by the air supply fan assembly 6 absorbing the air outside the room passes through filtration and pre-treatment, and then passes through the evaporator coil 3 and the condensation heat recovery coil 5 for temperature and / or humidity treatment to the required state and is sent into the room to achieve the effect of constant temperature and humidity in the room. The exhaust air formed by the exhaust fan assembly 10 absorbing the air in the room is discharged from the room after heat exchange in the condenser 9. Therefore, the indoor low-temperature exhaust air is utilized as a cold source, effectively reducing the condensation temperature of the air conditioner, reducing the power consumption of the compressor 9-1, and improving the energy efficiency ratio of the air conditioner.

[0037] Under the heating condition, the refrigerant undergoes work done by the compressor 9-1 to form a high-temperature and high-pressure refrigerant gas. After passing through the oil separator 9-2 and the check valve connected to the output end of the oil separator 9-2, it enters the condensation heat recovery coil 5 and the evaporation coil 3 respectively. After heat exchange in the condensation heat recovery coil 5 and the evaporation coil 3, the refrigerant flows out from the condensation heat recovery coil 5 through the check valve, and flows out from the evaporation coil 3 through the check valve and the refrigeration throttling element assembly 9-7. After converging, it enters the condenser 9 through the heating throttling element assembly 9-4 for heat exchange. After the refrigerant undergoes heat exchange in the condenser 9, it enters the gas-liquid separator 9-5 through the four-way valve, and is then transported by the gas-liquid separator 9-5 to the compressor 9-1. During this process, the fresh air formed by the air supply fan assembly 6 absorbing the air outside the room undergoes filtration and pretreatment, and then passes through the evaporation coil 3 and the condensation heat recovery coil 5 for temperature and / or humidity treatment to the required state and is sent into the room, achieving the effect of constant temperature and humidity in the room. Therefore, the use of the indoor high-temperature exhaust air as a heat source is realized, effectively improving the evaporation temperature of the heat pump system, increasing the heat exchange capacity, reducing the frosting temperature, and expanding the operating temperature range of the air conditioner.

[0038] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that the present utility model includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present utility model will be included in the scope of the claims.

Claims

1. A room air conditioner, characterized in that: The room air conditioner comprises a fresh air handling unit and an exhaust unit, wherein the fresh air handling unit comprises a first unit housing and an evaporation coil, a condensation heat recovery coil and an air supply fan assembly located in the first unit housing, and the exhaust unit comprises a second unit housing and a condenser and an exhaust fan assembly located in the second unit housing; The refrigerant that has passed through the compressor of the room air conditioner to do work enters the condensation heat recovery coil and the condenser respectively, flows out of the condensation heat recovery coil and the condenser, converges and enters the evaporation coil, and flows out of the evaporation coil and is sent back to the compressor of the room air conditioner; The air supply fan assembly is used to absorb air outside the room to form fresh air; the formed fresh air is sent into the room after being subjected to temperature and / or humidity treatment through the evaporator coil and the condensation heat recovery coil; the exhaust fan assembly is used to absorb air in the room to form exhaust air, and the formed exhaust air is discharged from the room after heat exchange through the condenser.

2. The room air conditioner according to claim 1, characterized in that The evaporating coil is connected to the condenser, and a heating throttling element assembly and a cooling throttling element assembly are arranged on one pipeline, and the heating throttling element assembly and the cooling throttling element assembly are respectively connected with a one-way valve in parallel, and the other pipeline is respectively connected to a four-way reversing valve; the other two ends of the four-way reversing valve are respectively connected to an oil-liquid separator and a gas-liquid separator; the condensing heat recovery coil is connected to the condenser, and one pipeline is connected between the heating throttling element assembly and the cooling throttling element assembly, and the other pipeline is connected between the four-way reversing valve and the oil-liquid separator, and a heat recovery throttling element assembly is provided.

3. The room air conditioner according to claim 2, characterized in that The evaporating coil and the condensing heat recovery coil are air-cooled fin coils.

4. The room air conditioner according to claim 1, characterized in that The air supply fan assembly is located at the air outlet of the first unit box.

5. The room air conditioner according to claim 1, characterized in that The exhaust fan assembly is located at the air outlet of the second unit box.

6. The room air conditioner according to any one of claims 1 to 5, characterized in that: The fresh air processing unit also includes a fresh air filter, which is located at the air inlet of the first unit case. The fresh air is filtered by the fresh air filter after passing through the air inlet of the first unit case.

7. The room air conditioner according to claim 6, characterized in that The fresh air processing unit also includes a pre-treatment coil, which is located between the fresh air filter and the evaporation coil or the condensation heat recovery coil along the fresh air flow direction to pre-treat the filtered fresh air.

8. The room air conditioner according to claim 7, characterized in that The heat exchange medium of the pretreatment coil is water.

9. The room air conditioner according to any one of claims 1 to 5, characterized in that: The exhaust unit further comprises a return air filter, and the return air filter is located at the air inlet of the second unit casing. The exhaust air passes through the air inlet of the second unit casing and is filtered by the return air filter.

10. The room air conditioner according to any one of claims 1 to 5, characterized in that The compressors of the supply air fan assembly, the exhaust air fan assembly and the room air conditioner are all variable frequency, and the fresh air handling unit also includes a control system, which is used to adjust the frequency of the compressors of the supply air fan assembly, the exhaust air fan assembly and the room air conditioner.

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