Window type air conditioner

Abstract

The utility model provides a window type air conditioner which comprises a shell, a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger, the compressor, the four-way valve, the indoor heat exchanger and the outdoor heat exchanger are arranged in the shell and sequentially connected to form a refrigerant loop, a drain valve is arranged on a chassis of the shell, and a supercooling pipe is further arranged in the shell, connected between the indoor heat exchanger and the outdoor heat exchanger and located on the chassis; the first one-way throttle valve is arranged between the indoor heat exchanger and the first end of the supercooling pipe; a throttling outlet of the first one-way throttling valve communicates with the indoor heat exchanger, and a throttling inlet of the first one-way throttling valve communicates with the first end of the supercooling pipe. The second one-way throttle valve is arranged between the outdoor heat exchanger and the second end of the supercooling pipe, a throttle outlet of the second one-way throttle valve is communicated with the outdoor heat exchanger, and a throttle inlet of the second one-way throttle valve is communicated with the second end of the supercooling pipe. The energy efficiency of the air conditioner during refrigeration and heating and the drainage performance of the air conditioner can be improved, freezing of the base plate is delayed or deicing is achieved, and the freezing risk of the base plate is reduced.

Description

Technical Field

[0001] The utility model relates to the field of air conditioning, in particular to a window type air conditioner. Background Art

[0002] Window air conditioners are generally installed in windows. They are available in cooling and heating types. They are smaller than wall-mounted air conditioners used daily. The compressor, indoor heat exchanger, outdoor heat exchanger, outdoor fan, etc. of window air conditioners are all installed in one shell. They are easy to install and maintain, consume less power, and are inexpensive. Although installing them in bedrooms or living rooms has the disadvantages of affecting lighting, making a lot of noise, and having poor aesthetics, installing them in kitchens, storage rooms, and other environments can not only achieve the effect of ventilation and regulating indoor temperature, but also do not affect the overall aesthetics of the room. Even if there is a noise problem, it will not affect daily life, so it has strong practicality.

[0003] In order to improve the heating performance of the window air conditioner in a low temperature environment, an electric heating device is installed in the window air conditioner to assist heating and ensure the heating effect. In the prior art, when the window air conditioner is in the heating mode and the external ambient temperature is higher than 2°C, the heating cycle and the electric heating device are used to alternately operate; when the external ambient temperature is below 2°C, in order to reduce the risk of damage to the air conditioner when operating in a low temperature environment and the decrease in heating performance, only the electric heating device is used for heating. This control scheme causes the heat exchange efficiency of the window air conditioner to be low in a low temperature environment, and when the ambient temperature is lower than 2°C, the chassis (bottom plate of the shell) of the window air conditioner is at risk of freezing, so that when the blades of the outdoor fan are running, the water rings on the blades are easy to touch the ice surface on the chassis, causing damage to the window air conditioner. Utility Model Content

[0004] In view of the above problems, the utility model provides a window air conditioner, which can improve the energy efficiency of the air conditioner during cooling and heating and the drainage performance of the air conditioner by adding an overcooling pipe, a first one-way throttle valve, a second one-way throttle valve and a drain valve, delay the freezing of the chassis or achieve thawing, and reduce the risk of freezing of the chassis.

[0005] The utility model provides a window air conditioner, comprising a shell and a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger which are arranged in the shell and connected in sequence to form a refrigerant circuit, a drain valve is arranged on the chassis of the shell, and the shell is also provided with: a supercooling pipe, which is connected between the indoor heat exchanger and the outdoor heat exchanger and is located on the chassis; a first one-way throttle valve, which is arranged between the indoor heat exchanger and the first end of the supercooling pipe; the throttling outlet of the first one-way throttle valve is communicated with the indoor heat exchanger, and the throttling inlet of the first one-way throttle valve is communicated with the first end of the supercooling pipe; a second one-way throttle valve, which is arranged between the outdoor heat exchanger and the second end of the supercooling pipe, the throttling outlet of the second one-way throttle valve is communicated with the outdoor heat exchanger, and the throttling inlet of the second one-way throttle valve is communicated with the second end of the supercooling pipe.

[0006] According to the technical solution, the setting of the first one-way throttle valve and the second one-way throttle valve can ensure that when the window air conditioner adds a supercooling pipe between the indoor heat exchanger and the outdoor heat exchanger, the throttling during heating or cooling is not affected, thereby ensuring the cooling and heating effects; the setting of the drain valve can facilitate the discharge of condensed water in the shell, and the positional relationship between the chassis and the supercooling pipe can ensure that: during cooling, the supercooling pipe is immersed in the condensed water accumulated on the chassis, thereby increasing the supercooling degree of the refrigerant in the supercooling pipe, thereby improving the cooling capacity and energy efficiency of the air conditioner; during heating, the high-temperature refrigerant flowing through the cooling pipe exchanges heat with the chassis, thereby increasing the temperature of the chassis, which can delay freezing or achieve thawing, reduce the risk of freezing of the chassis, and thereby improve the heating efficiency of the air conditioner.

[0007] In an optional technical solution of the utility model, when the window air conditioner is heating, the drain valve is in an open state.

[0008] According to the technical solution, when heating, opening the drain valve can drain the water in the shell to prevent the water in the shell from affecting the heat exchange between the chassis and the subcooling pipe. The high-temperature and high-pressure refrigerant at the compressor outlet passes through the four-way valve, indoor heat exchanger, first one-way throttle valve (conduction without throttling), subcooling pipe, second one-way throttle valve (one-way throttling), outdoor heat exchanger and then returns to the compressor. The refrigerant enters the subcooling pipe after condensing and releasing heat in the indoor heat exchanger. The refrigerant in the subcooling pipe is higher than the ambient temperature / chassis temperature, so it can contact the chassis for heat exchange and increase the chassis temperature. This technical solution is beneficial to delaying the freezing and thawing of the chassis. Compared with air conditioners that use electric heating for heating for a long time, it is beneficial to reduce heating energy consumption and improve the heating energy efficiency of air conditioners.

[0009] In an optional technical solution of the utility model, when the window air conditioner is cooling, the drain valve is in a closed state.

[0010] According to the technical solution, during cooling, the drain valve is closed, and the refrigerant at the compressor outlet passes through the four-way valve, outdoor heat exchanger, second one-way throttle valve (conduction without throttling), subcooling pipe, first one-way throttle valve (one-way throttling) and indoor heat exchanger and then returns to the compressor. The indoor heat exchanger is used as an evaporator, and the temperature of the evaporator surface is relatively low. The moisture in the air is cooled to produce condensed water and accumulate on the chassis. The subcooling pipe is arranged on the chassis and contacts the condensed water, which can achieve the subcooling of the refrigerant in the subcooling pipe, thereby increasing the subcooling degree of the refrigerant in the subcooling pipe and improving the cooling capacity and energy efficiency of the air conditioner.

[0011] In the optional technical solution of the utility model, the drain valve is arranged below the supercooling pipe. This technical solution is conducive to the discharge of condensed water at the supercooling pipe, ensuring the heat exchange effect when the supercooling pipe contacts the chassis during heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the refrigerant pipeline connection of a window air conditioner in an embodiment of the utility model.

[0013] Reference numerals:

[0014] Shell 1; drain valve 11; compressor 21; four-way valve 22; indoor heat exchanger 23; outdoor heat exchanger 24; subcooling pipe 25; first end 251; second end 252; first one-way throttle valve 26; second one-way throttle valve 27. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1As shown, the utility model provides a window air conditioner, comprising a housing 1 and a compressor 21, a four-way valve 22, an indoor heat exchanger 23 and an outdoor heat exchanger 24 which are arranged in the housing 1 and connected in sequence to form a refrigerant circuit, and a drain valve 11 is provided on the chassis of the housing 1. The housing 1 is also provided with: a subcooling pipe 25, which is connected between the indoor heat exchanger 23 and the outdoor heat exchanger 24 and is located on the chassis; a first one-way throttle valve 26, which is arranged between the indoor heat exchanger 23 and the first end 251 of the subcooling pipe 25, the throttling outlet of the first one-way throttle valve 26 is communicated with the indoor heat exchanger 23, and the throttling inlet of the first one-way throttle valve 26 is communicated with the first end 251 of the subcooling pipe 25 (that is, when the refrigerant flows from the subcooling pipe 25 to the indoor heat exchanger 23, the first one-way throttle valve 26 plays a throttling role. If the refrigerant flows to the opposite direction, the first one-way throttle valve 26 will be used for throttling. On the contrary, the first one-way throttle valve 26 only plays a conducting role); the second one-way throttle valve 27 is arranged between the outdoor heat exchanger 24 and the second end 252 of the subcooling pipe 25, the throttling outlet of the second one-way throttle valve 27 is connected to the outdoor heat exchanger 24, and the throttling inlet of the second one-way throttle valve 27 is connected to the second end 252 of the subcooling pipe 25 (that is, when the refrigerant flows from the subcooling pipe 25 to the outdoor heat exchanger 24, the second one-way throttle valve 27 plays a throttling role, if the refrigerant flows in the opposite direction, the second one-way throttle valve 27 only plays a conducting role).

[0017] In the above manner, the first one-way throttle valve 26 and the second one-way throttle valve 27 can realize the throttling of the air conditioner when heating or cooling respectively; the setting of the drain valve 11 can facilitate the discharge of condensed water in the housing 1, thereby improving the drainage performance of the window air conditioner. When cooling, by immersing the subcooling pipe 25 in the condensed water on the chassis, the heat exchange between the refrigerant in the subcooling pipe 25 and the condensed water is realized, and the subcooling degree of the refrigerant in the subcooling pipe 25 is increased, thereby improving the cooling capacity and energy efficiency of the air conditioner; when heating, the heat exchange between the refrigerant flowing through the cooling pipe 25 and the chassis can reduce the risk of freezing of the chassis, thereby reducing or avoiding the use of electric heating and improving the heating energy efficiency of the air conditioner.

[0018] In the preferred embodiment of the present invention, the drain valve 11 can be opened or closed as needed. The specific structure of the drain valve 11 is not limited, and any valve, plug, etc. that can drain the condensed water in the housing 1 and seal the housing 11 can be applied to this embodiment.

[0019] In this embodiment, the four-way valve 22 can realize the switching of cooling or heating mode. When the window air conditioner is in heating mode, the drain valve 11 is in an open state, and the refrigerant in the supercooling pipe 25 contacts and exchanges heat with the chassis. Specifically, when heating, opening the drain valve 11 can drain the water in the housing 1 to prevent the water in the housing 1 from affecting the heat exchange between the chassis and the supercooling pipe 25. The high-temperature and high-pressure refrigerant at the outlet of the compressor 21 passes through the four-way valve 22, the indoor heat exchanger 23, the first one-way throttle valve 26 (conduction without throttling), the supercooling pipe 25, the second one-way throttle valve 27 (one-way throttling) and the outdoor heat exchanger 24 in sequence and then returns to the compressor 21. The refrigerant enters the supercooling pipe 25 after condensing and releasing heat in the indoor heat exchanger 23. The refrigerant in the supercooling pipe 25 is higher than the ambient temperature, so it can exchange heat with the chassis, increase the chassis temperature, and is conducive to delaying ice formation and thawing of the chassis. Compared with long-term use of electric heating for heating, this implementation is beneficial to reducing heating energy consumption and improving the heating energy efficiency of the air conditioner.

[0020] When the window air conditioner is in cooling mode, the drain valve 11 is in a closed state, and the refrigerant at the outlet of the compressor 21 returns to the compressor 21 after passing through the four-way valve 22, the outdoor heat exchanger 24, the second one-way throttle valve 27 (conduction without throttling), the subcooling pipe 25, the first one-way throttle valve 26 (one-way throttling) and the indoor heat exchanger 23 in sequence. During cooling, the indoor heat exchanger 23 is used as an evaporator, and the temperature of the evaporator surface is relatively low. The moisture in the air is cooled to produce condensed water and accumulate on the chassis, which can be used as a low-temperature cold source for supercooling the subcooling pipe 25. The subcooling pipe 25 is arranged on the chassis and contacts the condensed water on the chassis, which can reduce the temperature of the subcooling pipe 25, realize the supercooling of the refrigerant in the subcooling pipe 25, increase the supercooling degree of the refrigerant in the subcooling pipe 25, and help improve the cooling capacity and energy efficiency of the air conditioner.

[0021] In this embodiment, the first one-way throttle valve 26 and the second one-way throttle valve 27 can be formed to include a one-way valve and a throttle valve arranged in parallel. When the flow direction of the refrigerant is the same as that of the one-way valve, the one-way valve is connected, and the refrigerant flows through the one-way valve without throttling. When the refrigerant flows in the direction opposite to the direction of the one-way valve, the refrigerant is blocked at the one-way valve and flows through the parallel throttle valve to achieve throttling of the refrigerant. In this embodiment, the described conduction without throttling means that the refrigerant flows through the one-way valve without throttling. One-way throttling means that the refrigerant flows through the throttle valve and does not flow through the one-way valve. The arrows in the first one-way valve 26 and the second one-way valve 27 in the figure indicate the flow direction of the refrigerant during throttling. When the flow direction of the refrigerant is opposite to the direction of the arrow, the pipeline is connected and the refrigerant flows. When the flow direction of the refrigerant is the same as the direction of the arrow, the refrigerant achieves throttling.

[0022] In the implementation manner of the present utility model, the supercooling pipe 25 is fixed on the chassis, and the technicians can choose a suitable way to fix it according to the actual situation, and this implementation manner does not limit this.

[0023] In a preferred embodiment of the present invention, the drain valve 11 is disposed below the supercooling pipe 25, which is conducive to the rapid discharge of condensed water at the supercooling pipe 25, thereby ensuring the heat exchange effect between the supercooling pipe 25 and the chassis during heating. It should be noted that the drain valve 11 can also be disposed at other positions of the chassis to facilitate the discharge of condensed water.

[0024] It should be noted that the chassis, outdoor fan and water ring are conventional structures of the window air conditioner, and this embodiment will not be described again. In addition, although this embodiment only describes the compressor, indoor heat exchanger, outdoor heat exchanger, four-way valve, shell, etc. of the air conditioner, the structure of the window air conditioner is not limited to the above components, and may also include a throttle valve, a gas-liquid separator, a capillary tube, an oil separator, a controller, etc., and this embodiment will not be described again.

[0025] The above are only preferred implementation modes of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A window air conditioner, comprising a housing and a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger which are arranged in the housing and connected in sequence to form a refrigerant circuit, characterized in that: A drain valve is provided on the bottom plate of the housing, and the housing is also provided with: A subcooling pipe connected between the indoor heat exchanger and the outdoor heat exchanger and located on the chassis; a first one-way throttle valve, disposed between the indoor heat exchanger and the first end of the supercooling pipe; a throttle outlet of the first one-way throttle valve is communicated with the indoor heat exchanger, and a throttle inlet of the first one-way throttle valve is communicated with the first end of the supercooling pipe; The second one-way throttle valve is arranged between the outdoor heat exchanger and the second end of the subcooling pipe. The throttling outlet of the second one-way throttle valve is connected to the outdoor heat exchanger, and the throttling inlet of the second one-way throttle valve is connected to the second end of the subcooling pipe.

2. The window air conditioner according to claim 1, characterized in that: When the window air conditioner is heating, the drain valve is in an open state.

3. The window air conditioner according to claim 1, characterized in that: When the window air conditioner is cooling, the drain valve is in a closed state.

4. The window air conditioner according to claim 1, characterized in that: The drain valve is arranged below the supercooling pipe.

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