Indoor unit of temperature and humidity independent processing household air conditioner

Abstract

The utility model provides a temperature and humidity independent processing household air conditioner indoor unit which comprises an indoor unit body and a fresh air valve arranged on the indoor unit body. A heat pipe evaporator, a surface air cooler, a negative pressure fan and a heat pipe condenser are sequentially arranged in the indoor unit body from an inlet of the fresh air valve. The heat pipe evaporator is communicated with the heat pipe condenser through a heat pipe refrigerant circulating pipe, an air return valve is arranged between the heat pipe evaporator and the surface air cooler, the air return valve is arranged on the upper portion or the lower portion of the indoor unit body, and the air return valve is an electric air return valve. The air conditioner has the advantage that the function of independently processing the temperature and the humidity of the comfortable air conditioner is achieved.

Description

Technical Field

[0001] The utility model relates to a household air-conditioning indoor unit capable of independently processing temperature and humidity, and relates to the field of heating, ventilation and air conditioning. Background Art

[0002] The main function of household air conditioner indoor units is to heat up or cool down indoor air: circulating air cools down or heats up, mainly to solve the indoor temperature; in order to reduce the indoor humidity load, the dehumidification function is realized while cooling down, heat and humidity are coupled, the air conditioning energy consumption is high, the circulating air temperature is low, the comfort experience is poor, and it is easy to get the so-called "air conditioning disease". In summer, cooling can also dehumidify the indoor air, but it is only circulating air dehumidification, heat and humidity are processed simultaneously, the energy consumption is high, and the temperature and humidity cannot be processed independently. Most air conditioner indoor units cannot independently process the fresh air and then send it to the air. The dehumidification function advertised is only low-temperature dehumidification of indoor circulating air. In the rainy season in the south, the air temperature is low after dehumidification, and the comfort level is poor. Conventional household air conditioners are difficult to meet the dehumidification needs in the rainy season. They often need to use electric auxiliary heating and reheating before sending it indoors, which is not energy-saving.

[0003] Existing household air conditioner indoor units do not have a one-way fresh air processing function (it may have a function of supplying air after the introduction of fresh air and the mixing of circulating air). In order to meet the needs of comfortable air conditioning, two completely independent air conditioning processing systems are often required - temperature control air conditioning and fresh air dehumidifier with heat recovery. Two completely independent temperature and humidity air conditioning systems are often used more in large air conditioning projects. If two sets of temperature and humidity air conditioning equipment systems are used for independent temperature and humidity processing air conditioning systems for household air conditioners, the investment is often too high and it is difficult to popularize them. However, it is difficult for conventional household air conditioners to use one air conditioning system to achieve fresh air dehumidification and circulating air greenhouse control while achieving temperature and humidity decoupling, let alone achieving exhaust heat recovery and fresh air dehumidification and reheat air supply functions in the same system. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a temperature and humidity independent processing household air-conditioning indoor unit which realizes the temperature and humidity independent processing functions of a comfort air-conditioning.

[0005] In order to achieve the above technical problems, the technical solution adopted by the utility model is:

[0006] A household air conditioner indoor unit with independent temperature and humidity processing, comprising an indoor unit body and a fresh air valve arranged on the indoor unit body;

[0007] The indoor unit body is provided with a heat pipe evaporator, a surface cooler, a negative pressure fan and a heat pipe condenser in sequence starting from the fresh air valve inlet;

[0008] The heat pipe evaporator and the heat pipe condenser are connected via a heat pipe refrigerant circulation pipe.

[0009] Furthermore, a return air valve is provided between the heat pipe evaporator and the surface cooler.

[0010] Furthermore, the return air valve is arranged at the upper part or the lower part of the indoor unit body.

[0011] Furthermore, the return air valve is an electric return air valve.

[0012] Furthermore, the surface cooler is arranged between the heat pipe evaporator and the heat pipe condenser, and is located in the negative pressure section of the negative pressure fan.

[0013] Furthermore, the heat pipe condenser is arranged in the positive pressure air outlet section of the negative pressure fan.

[0014] Furthermore, the fresh air valve is an electric fresh air valve.

[0015] Furthermore, a one-way valve is provided on the lower section of the heat pipe refrigerant circulation pipe, and the one-way valve is located at the lower part of the heat pipe evaporator and the heat pipe condenser.

[0016] Furthermore, the one-way valve is a Tesla valve.

[0017] The beneficial effects of adopting the above technical solution are:

[0018] The utility model retains the independent indoor circulating air heating and cooling functions (temperature processing function) on the basis of the traditional air-conditioning indoor unit, and also has the completely independent fresh air unit functions of one-way flow fresh air dehumidification, heat pipe heat recovery, and fresh air reheating. After optimization on the same set of traditional air-conditioning indoor units, it can realize fresh air dehumidification, heat recovery and reheating fresh air functions, with higher comfort.

[0019] The utility model realizes the decoupling of temperature / fresh air dehumidification by synchronously processing the temperature and humidity of the indoor unit at the same household air conditioner terminal, realizes the independent processing of temperature and fresh air humidity, improves the comfort and energy saving (increases the evaporation temperature and reduces the energy efficiency); introduces the heat pipe heat exchange technology, and recovers the waste heat of the incoming air to reheat the fresh air after dehumidification, which can avoid the problem of too low supply air temperature after fresh air replacement in the rainy season. The indoor unit of the household air conditioner not only has the basic function of circulating air temperature control, but also has the independent fresh air processing humidity control function and uses the heat pipe to recover the waste heat of the fresh air and reheat the dehumidified fresh air, which can ensure the comfort of fresh air dehumidification in the rainy season in the south.

[0020] The utility model can realize independent control of temperature and humidity and mixed air supply operation. By opening the fresh air valve and closing the return air valve, the one-way flow dehumidification fresh air replacement function can be realized, and the independent fresh air dehumidification function can be realized - solving the independent humidity fresh air processing function. The return air valve is opened and the fresh air valve is closed to realize the conventional circulating air temperature adjustment function. It can also be operated in various combination modes such as half-opening the two air valves, fresh air / circulating air mixed air operation, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a rear view structural diagram of the utility model;

[0023] Figure 3 This is a schematic diagram of the location structure of the heat pipe and the surface cooler of the utility model;

[0024] Figure 4 This is a schematic diagram of the independent processing flow of fresh air humidity of the utility model;

[0025] Figure 5 This is an independent processing flow chart of indoor temperature control of the utility model;

[0026] Figure 6 It is a schematic diagram of the operation principle of fresh air dehumidification waste heat recovery and reheating fresh air of the utility model;

[0027] 1. Surface cooler, 201. Heat pipe evaporator, 202. Heat pipe condenser, 203. Heat pipe refrigerant circulation pipe, 204. Tesla one-way valve, 3. Negative pressure fan, 4. Fresh air valve, 5. Return air valve, 6. Indoor unit body. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings.

[0029] As attached Figure 1-6As shown, this embodiment provides a household air conditioner indoor unit for independent temperature and humidity processing, which includes an indoor unit body 6 and a fresh air valve 4 arranged on the indoor unit body 6; the fresh air valve 4 is arranged on the back of the indoor unit body 6 and is connected to the outdoor fresh air. The fresh air valve 4 is an electric fresh air valve, which is controlled according to the change of indoor humidity and opened or closed according to the change of the signal from the indoor humidity sensor. The fresh air valve 4 can also be opened or closed by the user according to the mode requirements. The indoor unit body 6 is provided with heat pipes in sequence from the inlet of the fresh air valve 4. Evaporator 201, surface cooler 1, negative pressure fan 3 and heat pipe condenser 202; the heat pipe evaporator 201 and the heat pipe condenser 202 are connected through the heat pipe refrigerant circulation pipe 203, that is, after the outdoor fresh air enters from the fresh air valve 4, it passes through the heat pipe evaporator 201, the surface cooler 1, the negative pressure fan 3 in sequence and then enters the room through the heat pipe condenser 202. The surface cooler 1 is a surface cooler, and a refrigerant circulates inside it. The air flows through the outer wall of the metal pipe of the surface cooler 1 for heat exchange to achieve the purpose of further cooling the air. The heat pipe evaporator 201 constitutes an evaporation heat absorption section, and the heat pipe condenser 202 constitutes a condensation heat release section. The heat pipe refrigerant circulation pipe 203 is connected to form a separate heat pipe heat exchanger assembly, so that the fresh air heat of the pre-cooled fresh air is transferred to the cooled fresh air for free reheating through the heat pipe heat exchanger.

[0030] A return air valve 5 is arranged between the heat pipe evaporator 201 and the surface cooler 1. The return air valve 5 is an electric return air valve. The return air valve 5 can be controlled by the indoor temperature and opened or closed according to the signal change of the indoor temperature sensor. The return air valve 5 can also be opened or closed by the user according to the setting requirements.

[0031] The return air valve 5 is arranged on the upper part or the lower part of the indoor unit body 6 .

[0032] The return air valve 5 is an electric return air valve; the return air valve 5 is connected to an indoor temperature sensor.

[0033] The surface cooler 1 is disposed between the heat pipe evaporator 201 and the heat pipe condenser 202 , and is located in the negative pressure section of the negative pressure fan 3 .

[0034] The heat pipe condenser 202 is arranged in the positive pressure air outlet section of the negative pressure fan 3. Both fresh air and indoor circulating air need to pass through the heat pipe condenser 202 before being sent into the room; the difference is that the fresh air will be heated after passing through the condenser 202, the fresh air valve is opened, and a large amount of fresh air waste heat is absorbed by the heat pipe evaporator 201 and then transferred to the condenser 202 to heat the fresh air; while in the circulating air mode, since the fresh air valve 4 is closed and the return air valve 5 is located in the upper (or lower) part of the negative pressure section between the heat pipe evaporator 201 and the surface cooler 1, the circulating air does not flow through the heat pipe evaporator 201, so that the heat pipe evaporator 201 cannot absorb heat, and there is no waste heat in the heat pipe condenser 202 to heat the circulating air, and the circulating air is only sent into the room after passing through the heat pipe condenser 202.

[0035] A one-way valve 204 is provided on the lower section of the heat pipe refrigerant circulation pipe 203. The one-way valve 204 is a Tesla valve.

[0036] The one-way valve 204 is located at the lower part of the heat pipe evaporator 201 and the heat pipe condenser 202. The heat pipe heat exchanger evaporator 201 and the heat pipe condenser 202 are connected by the heat pipe refrigerant circulation pipe 203, forming an upper heat pipe refrigerant circulation pipe 203 mainly gaseous pipeline and a lower liquid return pipe. The lower liquid return pipe is connected to the heat pipe evaporator 201 and the lower liquid return pipe of the heat pipe condenser 202. A one-way valve 204 is connected in series to ensure that the liquid refrigerant flows from the heat pipe condenser 202 to the heat pipe evaporator 201 in an orderly manner, so as to recover the heat of the fresh air and absorb heat through evaporation in the evaporator 201, and the temperature of the fresh air is reduced; the low-temperature fresh air that has been deeply cooled and dehumidified by the surface cooler 1 is reheated by the heat pipe condenser 202 and then sent into the room. A water collecting box for collecting condensed water can be set below the surface cooler 1.

[0037] The split heat pipe heat exchanger is composed of a heat pipe evaporator 201 and a heat pipe condenser 202, which form a heat pipe evaporation section and a heat pipe condensation section. Its function is to first recover the waste heat of the fresh air (the heat pipe evaporation section absorbs the heat of the fresh air) during the fresh air dehumidification process, reduce the sensible heat temperature of the fresh air, and then pass through the surface cooler for deep cooling and dehumidification, and then pass through the heat pipe condenser 202 for reheating and equalizing humidity and heating before being sent to the room, so that the temperature of the fresh air sent to the room will not be too low, especially in the rainy season, avoiding the experience of poor comfort when the fresh air after dehumidification is sent to the room at a low temperature, and realizing the independent processing function of temperature and humidity of the comfort air conditioner on the basis of the traditional household air conditioner indoor unit circulating air cooling / heating. The dehumidification fresh air burden air conditioning heat and humidity function is realized on the same air conditioner indoor unit, the fresh air is cooled by the heat pipe evaporator and enters the air conditioner evaporator for cooling and dehumidification (reducing the heat load burden of the surface cooler and saving energy), and the waste heat of the fresh air is used to reheat the air for free through the heat pipe heat exchanger and then sent to the room, which is more comfortable, especially in the rainy season, the fresh air comfort is better after dehumidification and reheating.

[0038] The utility model can realize independent control of temperature and humidity and mixed air supply operation. By opening the fresh air valve and closing the return air valve, the one-way flow dehumidification fresh air replacement function can be realized, and the independent fresh air dehumidification function can be realized - solving the independent humidity fresh air processing function. Open the return air valve and close the fresh air valve to realize the conventional circulating air temperature adjustment function. It can also operate in multiple combination modes such as half-opening the two air valves, fresh air / circulating air mixed air operation, etc. The specific operation mode flow is described as follows:

[0039] 1. Description of the process flow of independent treatment of fresh air humidity

[0040] like Figure 4 As shown, when the indoor humidity exceeds the set value, the return air valve 5 is closed and the fresh air valve 4 is opened at the same time. Under the operation of the negative pressure fan 3, the fresh air ① is pre-cooled by the heat pipe evaporator 201, flows through the surface cooler 1 inside the air conditioner to be cooled and dehumidified by the humidity, and the low-temperature cold air after cooling and dehumidification flows through the heat pipe condenser 202 to be heated and then sent into the room; the purpose of the fresh air pre-cooling heat being transferred by the heat pipe to reheat the fresh air for free is achieved, and the waste heat recovery fresh air mode is realized at the terminal of the traditional household air conditioner; when the indoor humidity is lower than the set value, the fresh air dehumidification mode is turned off.

[0041] 2. Indoor temperature control independent processing process description

[0042] like Figure 5 As shown, when the indoor temperature is lower than the set value, the fresh air valve 4 is closed and the return air valve 5 is opened at the same time. Under the operation of the negative pressure fan 3, the indoor circulating return air ③ flows through the surface cooler 1 of the air conditioner, and the circulating air is cooled by the surface cooler 1. The low-temperature circulating air flows through the condensing section of the heat pipe (without any heat exchange) and is delivered to the room to achieve the heating or cooling of the sensible heat of the indoor air, and stops when the set temperature is reached.

[0043] 3. Indoor temperature control and partial fresh air mixing process description

[0044] When the indoor temperature and humidity are not up to standard, based on the above process flow, the fresh air valve 4 and the return air valve 5 are partially opened at the same time. Under the operation of the negative pressure fan 3, part of the fresh air ① releases heat through the evaporator 201 of the heat pipe heat exchanger and mixes with the return air in the inlet section of the surface cooler 1. After flowing through the surface cooler 1 for cooling and dehumidification, it is reheated through the heat pipe condenser 202 and then sent into the room.

[0045] 4. Operation principle and process description of fresh air dehumidification, waste heat recovery and reheating fresh air

[0046] like Figure 6As shown, the fresh air ① first passes through the heat pipe heat exchanger evaporator 201 to exchange heat with the liquid medium. The high-temperature fresh air makes the working medium in the heat pipe evaporator 201 boil, and is introduced into the heat pipe condenser 202 in gaseous form through the heat pipe refrigerant circulation pipe 203; after the fresh air is pre-cooled by the heat pipe evaporator 201, it flows through the air conditioner internal unit surface cooler 1, and the fresh air is deeply cooled and dehumidified. The low-temperature cold air then flows through the high-temperature working medium in the heat pipe condenser 202 to be heated, and the fresh air is heated again; the high-temperature gaseous working medium in the heat pipe condenser 202 is cooled and becomes liquid, and passes through the one-way valve 204 under the working medium pressure difference, and the working medium flows to the heat pipe evaporator 201 to evaporate and absorb heat, and this cycle is realized, so that the pre-cooling heat of the fresh air is transferred by the heat pipe to recover the free waste heat and reheat the fresh air.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A household air conditioner indoor unit with independent temperature and humidity control, characterized in that: It comprises an indoor unit body (6), and a fresh air valve (4) arranged on the indoor unit body (6); The interior of the indoor unit body (6) is provided with a heat pipe evaporator (201), a surface cooler (1), a negative pressure fan (3) and a heat pipe condenser (202) in sequence starting from the inlet of the fresh air valve (4); The heat pipe evaporator (201) and the heat pipe condenser (202) are connected via a heat pipe refrigerant circulation pipe (203).

2. A household air conditioner indoor unit with independent temperature and humidity processing according to claim 1, characterized in that: An air return valve (5) is provided between the heat pipe evaporator (201) and the surface cooler (1).

3. A household air conditioner indoor unit with independent temperature and humidity processing according to claim 2, characterized in that: The return air valve (5) is arranged at the upper part or the lower part of the indoor unit body (6).

4. A household air conditioner indoor unit with independent temperature and humidity processing according to claim 2, characterized in that: The return air valve (5) is an electric return air valve.

5. The household air conditioner indoor unit with independent temperature and humidity processing according to claim 1, characterized in that: The surface cooler (1) is arranged between the heat pipe evaporator (201) and the heat pipe condenser (202), and is located in the negative pressure section of the negative pressure fan (3).

6. The household air conditioner indoor unit with independent temperature and humidity processing according to claim 1, characterized in that: The heat pipe condenser (202) is arranged in the positive pressure air outlet section of the negative pressure fan (3).

7. The household air conditioner indoor unit with independent temperature and humidity processing according to claim 1, characterized in that: The fresh air valve (4) is an electric fresh air valve.

8. The household air conditioner indoor unit with independent temperature and humidity control according to claim 1, characterized in that: A one-way valve (204) is provided on the lower section of the heat pipe refrigerant circulation pipe (203), and the one-way valve (204) is located at the lower part of the heat pipe evaporator (201) and the heat pipe condenser (202).

9. A household air conditioner indoor unit with independent temperature and humidity processing according to claim 8, characterized in that: The one-way valve (204) is a Tesla valve.

Images