A type of air-conditioning wall

Abstract

This invention discloses a wall-mounted air conditioner, comprising an upper module and a lower module. The upper module includes a surface cooler, an evaporator, and a fan arranged sequentially. The lower module includes a compressor, a heat exchanger, and a control valve assembly. The inlet of the surface cooler is connected to a heat exchange inlet pipe, the outlet of the surface cooler is connected to the heat exchange inlet of the heat exchanger, and the heat exchange outlet of the heat exchanger is connected to a heat exchange outlet pipe. The evaporator's interface is connected to the heat exchanger's refrigeration interface via the compressor. By distributing multiple components in the upper and lower modules, the layout of each component is more rational, reducing the occupation of refrigeration space, reducing return air resistance, reducing the impact of component heat generation on return air temperature, and improving air conditioning efficiency.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment, and in particular to a wall-mounted air conditioner. Background Technology

[0002] As the demand for data center applications grows, the corresponding increase in heat dissipation needs also presents a significant challenge. Traditional data center air conditioners have insufficient cooling capacity to meet the needs of existing data centers; therefore, large-capacity air-wall air conditioners are generally used to meet the requirements.

[0003] In the process of realizing this invention, the inventors discovered that the prior art has at least the following problems: although a simple air-cooled wall-mounted air conditioner meets the cooling requirements, it has high energy consumption and cannot meet energy-saving requirements; while a water-cooled wall-mounted air conditioner can solve the energy consumption problem, it still cannot meet the cooling requirements. Furthermore, the layout of the various components inside the air conditioner is not reasonable enough, occupying cooling space, increasing return air resistance, and the heat generated by the components themselves affects the return air temperature.

[0004] Therefore, how to provide a wind-wall air conditioner that simultaneously meets energy-saving and cooling requirements and has a reasonable layout is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a wall-mounted air conditioner to solve the technical problems of unreasonable internal layout and occupancy of cooling space in existing wall-mounted air conditioners.

[0006] To solve the above-mentioned technical problems, the present invention provides a wall-mounted air conditioner, including an upper module and a lower module. The upper module includes a surface cooler, an evaporator and a fan arranged in sequence. The lower module includes a compressor, a heat exchanger and a control valve group. The inlet of the surface cooler is connected to a heat exchange inlet pipe, the outlet of the surface cooler is connected to the heat exchange inlet of the heat exchanger, the heat exchange outlet of the heat exchanger is connected to a heat exchange outlet pipe, and the interface of the evaporator is connected to the refrigeration interface of the heat exchanger through the compressor.

[0007] Preferably, the upper module includes an upper housing, in which the surface cooler, the evaporator, and the fan are integrated and installed; the lower module includes a lower housing, in which the compressor, the heat exchanger, and the control valve group are integrated and installed.

[0008] Preferably, the upper housing is mounted above the electrostatic floor, and the lower housing is embedded below the electrostatic floor.

[0009] Preferably, the surface cooler and the evaporator are in contact with each other, the fan is located on the outside of the evaporator, and the fan blows return air towards the surface cooler.

[0010] Preferably, a filter screen is provided on the outer side of the surface cooler.

[0011] Preferably, the heat exchange valve group includes a first control valve, a second control valve, and a third control valve. The first control valve is connected to the heat exchange outlet of the heat exchanger and the heat exchange outlet pipe, respectively. The second control valve is connected to the heat exchange inlet of the heat exchanger and the heat exchange outlet pipe, respectively. The third control valve is connected to the heat exchange inlet of the heat exchanger and the inlet and outlet of the surface cooler, respectively.

[0012] Preferably, the first control valve and the second control valve are two-way valves, and the third control valve is a three-way valve.

[0013] Preferably, the heat exchanger is a plate heat exchanger, and coils are provided inside the surface cooler and the evaporator.

[0014] Preferably, the device includes two compressors, which are respectively connected to two ports of the evaporator and two refrigeration ports of the heat exchanger.

[0015] Preferably, the two compressors deliver power in opposite directions.

[0016] This invention provides a wall-mounted air conditioner, comprising an upper module and a lower module. The upper module includes a surface cooler, an evaporator, and a fan arranged sequentially. The lower module includes a compressor, a heat exchanger, and a control valve assembly. The inlet of the surface cooler is connected to a heat exchange inlet pipe, the outlet of the surface cooler is connected to the heat exchange inlet of the heat exchanger, the heat exchange outlet of the heat exchanger is connected to a heat exchange outlet pipe, and the interface of the evaporator is connected to the refrigeration interface of the heat exchanger through the compressor.

[0017] During operation, it features mechanical cooling mode, pre-cooling mode, and natural cooling mode. Selecting the appropriate cooling mode allows for full utilization of natural cold sources, eliminating the need for a separate outdoor unit for condensation and heat exchange. The upper module is the cooling module, while the lower module houses the piping components and other devices. Furthermore, the lower module can be placed under the electrostatic floor, reducing the space occupied by piping components or electrical control components in the cooling module. This allows for a smaller depth dimension of the air conditioner, resulting in a smaller footprint for the same cooling capacity. Simultaneously, because the electrical control components, compressor, and heat exchanger are located in the lower module, the return air resistance of the upper module is reduced, as is the impact of the components' own heat generation on the return air temperature. This effectively reduces fan power and improves air conditioner energy efficiency. Attached Figure Description

[0018] Figure 1 A side view schematic diagram of a specific embodiment of the air-wall air conditioner provided by the present invention;

[0019] Figure 2 This is a front view schematic diagram of a specific embodiment of the air-wall air conditioner provided by the present invention;

[0020] Figure 3This is a system schematic diagram of a specific embodiment of the air-wall air conditioner provided by the present invention.

[0021] The components include: surface cooler 1, evaporator 2, heat exchanger 3, electrostatic floor 4, compressor 5, heat exchange inlet pipe 6, heat exchange outlet pipe 7, first control valve 8, second control valve 9, third control valve 10, fan 11, and filter screen 12. Detailed Implementation

[0022] The core of this invention is to provide a wall-mounted air conditioner to solve the technical problems of unreasonable internal layout and occupancy of cooling space in existing wall-mounted air conditioners.

[0023] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Please refer to Figures 1 to 3 , Figure 1 A side view schematic diagram of a specific embodiment of the air-wall air conditioner provided by the present invention; Figure 2 This is a front view schematic diagram of a specific embodiment of the air-wall air conditioner provided by the present invention; Figure 3 This is a system schematic diagram of a specific embodiment of the air-wall air conditioner provided by the present invention.

[0025] This invention provides a wall-mounted air conditioner, comprising an upper module and a lower module. The upper module includes a surface cooler 1, an evaporator 2, and a fan 11 arranged sequentially. The lower module includes a compressor 5, a heat exchanger 3, and a control valve assembly. Both the surface cooler 1 and the evaporator 2 are provided with inlets and outlets, and their respective pipelines do not interfere with each other. The heat exchanger 3 has a heat exchange inlet, a heat exchange outlet, and two refrigeration interfaces. The heat exchange inlet pipe 6 is connected to the inlet of the surface cooler 1, the outlet of the surface cooler 1 is connected to the heat exchange inlet of the heat exchanger 3, and the heat exchange outlet of the heat exchanger 3 is connected to the heat exchange outlet pipe 7, forming a heat exchange loop. The heat exchange medium flows within this loop. The fan 11 blows air onto the surface cooler 1, and the air exchanges heat with the surface cooler 1, blowing out cold air to achieve cooling. The heat exchange medium can be various types of flowing media such as water. The natural cold source outputs the heat exchange medium through the heat exchange inlet pipe 6, and the heat exchange medium flows back to the natural cold source through the heat exchange outlet pipe 7. After heat exchange, the high-temperature heat exchange medium is cooled within the natural cold source. A power unit can also be installed within the natural cold source. The outlet of the compressor 5 is connected to the refrigeration interface of the heat exchanger 3, and another refrigeration interface of the heat exchanger 3 is connected to the inlet of the evaporator 2. The interface of the evaporator 2 is connected to the inlet of the compressor 5, forming a refrigeration circuit. The refrigerant flows within this circuit, and the fan 11 blows air into the evaporator 2. The air exchanges heat with the evaporator 2, and the blown-out cold air achieves refrigeration.

[0026] During operation, it features mechanical cooling mode, pre-cooling mode, and natural cooling mode. Selecting the appropriate cooling mode allows for full utilization of natural cold sources, eliminating the need for a separate outdoor unit for condensation and heat exchange. The upper module is the cooling module, while the lower module houses the piping components and other devices. Furthermore, the lower module can be placed under the electrostatic floor, reducing the space occupied by piping components or electrical control components in the cooling module. This allows for a smaller depth dimension of the air conditioner, resulting in a smaller footprint for the same cooling capacity. Simultaneously, because the electrical control components, compressor, and heat exchanger are located in the lower module, the return air resistance of the upper module is reduced, as is the impact of the components' own heat generation on the return air temperature. This effectively reduces fan power and improves air conditioner energy efficiency.

[0027] Specifically, the upper module includes an upper housing, in which the surface cooler 1, evaporator 2, and fan 11 are integrated and installed. The lower module includes a lower housing, in which the compressor 5, heat exchanger 3, and control valve assembly are integrated and installed. The upper housing is installed above the electrostatic floor 4, and the lower housing is embedded below the electrostatic floor 4. The upper and lower modules are independent units and can be transported and handled separately when transportation space is limited. Furthermore, maintaining the internal components of the lower module, which has a higher failure rate, does not affect the normal operation and use of the upper module. Also, because the upper and lower modules are separated, the risk of water entering the machine room in the event of a leak or overflow from the lower module is effectively reduced.

[0028] The surface cooler 1 and evaporator 2 are in close contact with each other. The fan 11 is located on the outside of the evaporator 2, and the return air from the fan 11 is blown towards the surface cooler 1. A filter screen 12 is installed on the outside of the surface cooler 1. The surface cooler 1 and evaporator 2 can participate in heat exchange simultaneously, improving the overall efficiency of the unit, avoiding energy waste, and enhancing the stability and safety of system operation. On the one hand, the surface cooler 1 provides a pre-cooling effect; on the other hand, it can prevent the surface cooler 1 from freezing and cracking when the evaporator 2 reaches a low temperature.

[0029] In the air conditioning system provided in the specific embodiment of the present invention, the control valve group includes a first control valve 8, a second control valve 9, and a third control valve 10. The first control valve 8 is connected to the heat exchange outlet and heat exchange outlet pipe 7 of the heat exchanger 3, the second control valve 9 is connected to the heat exchange inlet and heat exchange outlet pipe 7 of the heat exchanger 3, and the third control valve 10 is connected to the heat exchange inlet of the heat exchanger 3 and the inlet and outlet of the surface cooler 1, and controls the flow opening. That is, the heat exchanger 3 is connected in series with the first control valve 8, the second control valve 9 is connected in parallel with the heat exchanger 3 and the first control valve 8, and a bypass passage that can short-circuit the surface cooler 1 is provided, which is connected to the system through the third control valve 10.

[0030] Specifically, heat exchange inlet pipe 6 is connected to the inlet of surface cooler 1, and the outlet of surface cooler 1 is connected to the first port of third control valve 10. The second port of third control valve 10 is connected to the heat exchange inlet of heat exchanger 3. Simultaneously, the third port of third control valve 10 is connected to heat exchange inlet pipe 6 via a bypass. The heat exchange outlet of heat exchanger 3 is connected to heat exchange outlet pipe 7 via first control valve 8, forming a heat exchange loop. The heat exchange medium flows within this loop. A fan blows air onto surface cooler 1, and the air exchanges heat with surface cooler 1, blowing out cold air to achieve cooling. Simultaneously, the outlet of surface cooler 1 is also directly connected to heat exchange outlet pipe 7 via second control valve 9. The outlet of compressor 5 is connected to the refrigeration inlet of heat exchanger 3, and the refrigeration outlet of heat exchanger 3 is connected to electronic expansion valve. The electronic expansion valve is then connected to the inlet of evaporator 2, and the outlet of evaporator 2 is connected to the inlet of compressor 5, forming a refrigeration loop. The refrigerant flows within this loop, and a fan blows air onto evaporator 2, and the air exchanges heat with evaporator 2, blowing out cold air to achieve cooling.

[0031] During operation, it is necessary to determine the relative temperatures of the heat exchange medium inlet and return air. If the heat exchange medium inlet temperature is higher than the return air temperature, the surface cooler 1 is no longer suitable for refrigeration and enters mechanical cooling mode. The first control valve 8 opens, the second control valve 9 closes, the first and second ports of the third control valve 10 are isolated, and the second and third ports are connected. The compressor 5 starts, and the heat exchange medium flows sequentially through the heat exchange inlet pipe 6, the third control valve 10, the heat exchanger 3, the first control valve 8, and the heat exchange outlet pipe 7. The refrigerant flows sequentially through the compressor 5, the heat exchanger 3, the electronic expansion valve, and the evaporator 2. The heat exchange medium and the refrigerant exchange heat in the heat exchanger 3 to help complete the refrigerant's morphological change. During refrigeration, the evaporator 2 exchanges heat with the air, thereby blowing out cold air.

[0032] If the temperature of the heat exchange medium entering the system is lower than the return air temperature, the natural cold source can continue to operate. In pre-cooling mode, the compressor 5 is started, the first control valve 8 is opened, the second control valve 9 is closed, the first interface of the third control valve 10 is opened to the second interface, and the third interface is closed. The heat exchange medium flows sequentially through the heat exchange inlet pipe 6, the surface cooler 1, the heat exchanger 3, the first control valve 8, and the heat exchange outlet pipe 7. The refrigerant flows sequentially through the compressor 5, the heat exchanger 3, the electronic expansion valve, and the evaporator 2. The heat exchange medium and the refrigerant exchange heat in the heat exchanger 3 to help complete the refrigerant's morphological change. At the same time, since the temperature of the heat exchange medium entering the system is always lower than the return air temperature, the fan blowing towards the surface cooler 1 will not affect the cooling operation. During cooling, the surface cooler 1 and the evaporator 2 exchange heat with the air together. The surface cooler 1 can also pre-cool the evaporator 2 to prevent damage to the evaporator 2, and then blow out cold air. In natural cooling mode, compressor 5 is shut off, first control valve 8 is closed, second control valve 9 is open, and the first port of third control valve 10 is open to the second port while the third port is closed. The heat exchange medium flows sequentially through heat exchange inlet pipe 6, surface cooler 1, second control valve 9, and heat exchange outlet pipe 7. The refrigerant does not flow. Since the inlet temperature of the heat exchange medium is always lower than the return air temperature, the fan blows towards surface cooler 1. During cooling, surface cooler 1 exchanges heat with the air, thus blowing out cold air. In natural cooling mode, the air does not pass through heat exchanger 3, resulting in low water resistance and no pressure drop.

[0033] Preferably, the first control valve 8 and the second control valve 9 are two-way valves, and the third control valve 10 is a three-way valve. The load rate of the direct expansion refrigeration system is calculated using the evaporation temperature, condensation temperature, and compressor frequency. If the load rate is higher than 80%, it is found that the flow rate of the surface cooler 1 is too high, resulting in a large pressure drop. Closing the three-way valve to 70% reduces the overall water pressure drop by 20-30%, and the cooling capacity of the surface cooler 1 decreases by less than 5%. Alternatively, a flow meter can be used to detect the flow rate; once the set value is reached, the three-way valve is closed to 70%. Furthermore, to prevent switching between pre-cooling mode and natural cooling mode, the compressor runs at its lower limit speed for a period of time before switching to natural cooling mode. When the compressor is running at its lower limit speed, the three-way valve switches to a regulating type, closing slightly to reduce the cooling capacity output of the surface cooler 1, thus preventing excessive drop in the supply air temperature. All set parameters can be adjusted as needed, all within the scope of this invention.

[0034] Specifically, heat exchanger 3 is a plate heat exchanger 3, and coils are installed inside surface cooler 1 and evaporator 2.

[0035] Based on the air-wall air conditioner provided in the above-described specific embodiments, it includes two compressors 5, which are respectively connected to two interfaces of the evaporator 2 and two refrigeration interfaces of the heat exchanger 3. Specifically, the two compressors 5 have opposite delivery directions. This makes the evaporator 2 evaporate more evenly, avoids the occurrence of local hot spots, and also reduces operating power.

[0036] The air-wall air conditioner provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A wall-mounted air conditioner, characterized in that, The device includes an upper module and a lower module. The upper module includes a surface cooler (1), an evaporator (2), and a fan (11) arranged in sequence. The lower module includes a compressor (5), a heat exchanger (3), and a control valve group. The inlet of the surface cooler (1) is connected to the heat exchange inlet pipe (6), the outlet of the surface cooler (1) is connected to the heat exchange inlet of the heat exchanger (3), the heat exchange outlet of the heat exchanger (3) is connected to the heat exchange outlet pipe (7), and the interface of the evaporator (2) is connected to the refrigeration interface of the heat exchanger (3) through the compressor (5). The upper module includes an upper housing, in which the surface cooler (1), the evaporator (2) and the fan (11) are integrated and installed. The lower module includes a lower housing, in which the compressor (5), the heat exchanger (3) and the control valve group are integrated and installed. The upper housing is installed above the electrostatic floor (4), and the lower housing is embedded below the electrostatic floor (4); It includes two compressors (5), which are respectively connected to two ports of the evaporator (2) and two refrigeration ports of the heat exchanger (3); The two compressors (5) have opposite delivery directions; It features mechanical cooling mode, pre-cooling mode, and natural cooling mode; To prevent switching between pre-cooling mode and natural cooling mode, the single compressor (5) runs at its lower limit speed for a period of time before switching to natural cooling mode; In the pre-cooling mode, the surface cooler (1) and the evaporator (2) exchange heat with the air together, and the surface cooler (1) can also pre-cool the evaporator (2).

2. The air-wall air conditioner according to claim 1, characterized in that, The surface cooler (1) and the evaporator (2) are in contact with each other, and the fan (11) is located on the outside of the evaporator (2). The fan (11) blows return air towards the surface cooler (1).

3. The air-wall air conditioner according to claim 2, characterized in that, A filter screen (12) is provided on the outside of the surface cooler (1).

4. The air-wall air conditioner according to claim 1, characterized in that, The heat exchange valve group includes a first control valve (8), a second control valve (9) and a third control valve (10). The first control valve (8) is connected to the heat exchange outlet of the heat exchanger (3) and the heat exchange outlet pipe (7) respectively. The second control valve (9) is connected to the heat exchange inlet of the heat exchanger (3) and the heat exchange outlet pipe (7) respectively. The third control valve (10) is connected to the heat exchange inlet of the heat exchanger (3) and the inlet and outlet of the surface cooler (1) respectively.

5. The air-wall air conditioner according to claim 4, characterized in that, The first control valve (8) and the second control valve (9) are two-way valves, and the third control valve (10) is a three-way valve.

6. The air-wall air conditioner according to claim 1, characterized in that, The heat exchanger (3) is specifically a plate heat exchanger, and the surface cooler (1) and the evaporator (2) are equipped with coils.

Images