JPS6252344A - Air conditioning control device for vehicle - Google Patents

Air conditioning control device for vehicle

Info

Publication number
JPS6252344A
JPS6252344A JP60189493A JP18949385A JPS6252344A JP S6252344 A JPS6252344 A JP S6252344A JP 60189493 A JP60189493 A JP 60189493A JP 18949385 A JP18949385 A JP 18949385A JP S6252344 A JPS6252344 A JP S6252344A
Authority
JP
Japan
Prior art keywords
temperature
vehicle
inverter
frequency
temperature range
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP60189493A
Other languages
Japanese (ja)
Inventor
Koichiro Tsutsumi
堤 好一郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP60189493A priority Critical patent/JPS6252344A/en
Publication of JPS6252344A publication Critical patent/JPS6252344A/en
Pending legal-status Critical Current

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  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE:To constantly drive a compressor at a necessary minimum frequency, suppress a variation in the driving frequency of the compressor and improve a space cooling efficiency by providing a control circuit including a temperature range setting means and a frequency increasing and decreasing means. CONSTITUTION:A compressor for compressing coolant is driven by means of an inverter 3A and a temperature within a vehicle is detected by means of a temperature sensor 11. Further, in a control circuit 4A which controls the output frequency of the inverter based on a desired temperature and the temperature within the vehicle, a temperature range setting means 40 sets a predetermined temperature range in accordance with the desired temperature. Frequency increasing and decreasing means 41-44 increment the output frequency of the inverter by a predetermined amount at every predetermined time when a temperature within the vehicle exceeds the uppermost value of said temperature range, and decreases the output frequency of the inverter by a predetermined amount at every predetermined time when a temperature within the vehicle is less than the lowest value of said temperature range. Further, when the temperature within the vehicle is between the uppermost value and the lowest value, the output frequency of the inverter is kept constant.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は、圧縮機の駆動周波数の変動を少なくした車
両用空調制御装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle air conditioning control device that reduces fluctuations in the driving frequency of a compressor.

[従来の技術] 第5図は従来の車両用空調制御装置を示すブロック図で
ある。図において、(1)はDC幹線であり、一方の端
子(1a)には図示しない直流高圧架線から受電した直
流電圧が降圧されて印加され、他方の端子(1b)は接
地されている。(2)はDC幹線(1)の両端間に接続
された電源コンデンサ、(3)は電源コンデンサ(2)
から供給される電圧を可変電圧可変周波数(VVVF)
の三相交流に変換するインバータ、(13)は電源コン
デンサ(2)から供給される電圧を固定電圧固定周波数
(CVCF)の三相交流に変換するインバータである。
[Prior Art] FIG. 5 is a block diagram showing a conventional vehicle air conditioning control device. In the figure, (1) is a DC trunk line, to which a reduced DC voltage received from a DC high-voltage overhead line (not shown) is applied to one terminal (1a), and the other terminal (1b) is grounded. (2) is the power supply capacitor connected between both ends of the DC main line (1), (3) is the power supply capacitor (2)
Variable Voltage Variable Frequency (VVVF)
(13) is an inverter that converts the voltage supplied from the power supply capacitor (2) into three-phase AC of fixed voltage constant frequency (CVCF).

(4)はインバータ(3)の出力周波数を可変変調パル
スで制御すると共に、インバータ(13)に固定パルス
を供給する制御回路である。
(4) is a control circuit that controls the output frequency of the inverter (3) with a variable modulation pulse and supplies a fixed pulse to the inverter (13).

(5・)はVVVFのインバータ(3)の出力端子に接
続された冷媒圧縮用の圧縮機である。(6)は圧縮機(
5)で圧縮された冷媒を凝縮するための室外ファン、(
7)は室外ファン(6)で凝縮され更にキャピラリチュ
ーブ(図示せず)で膨張された冷媒を蒸発させる冷却器
用の室内ファンであり、これらは共にcvcpのインバ
ータ(13)の出力端子に接続されている。
(5) is a refrigerant compressor connected to the output terminal of the VVVF inverter (3). (6) is a compressor (
5) an outdoor fan for condensing the refrigerant compressed in (
7) is an indoor fan for the cooler that evaporates the refrigerant that has been condensed by the outdoor fan (6) and further expanded by the capillary tube (not shown), and these are both connected to the output terminal of the CVCP inverter (13). ing.

次に、第5図に示した従来装置の動作について説明する
Next, the operation of the conventional device shown in FIG. 5 will be explained.

圧縮機(5)は低圧の冷媒を高温、高圧の蒸気にして凝
縮器に送る。室外ファン(6)を有する凝縮器は冷媒を
高圧のまま冷却、凝縮して液体にする。
The compressor (5) converts the low-pressure refrigerant into high-temperature, high-pressure vapor and sends it to the condenser. A condenser equipped with an outdoor fan (6) cools and condenses the refrigerant at high pressure to liquid.

次に、図示しないキャピラリチューブが高圧の液体冷媒
を膨張させ、低温の湿り蒸気にして冷却器に送る。室内
ファン(7)を有する冷却器は、車両内の空気からの熱
を冷媒に与え、低圧の過熱蒸気にして再び圧縮機(5)
に送る。以上のサイクルを繰り返し、室内ファン(7)
は車両内に冷風を送る。
Next, a capillary tube (not shown) expands the high-pressure liquid refrigerant, converts it into a low-temperature wet vapor, and sends it to the cooler. A cooler with an indoor fan (7) gives heat from the air inside the vehicle to the refrigerant, turns it into low-pressure superheated steam, and sends it back to the compressor (5).
send to Repeat the above cycle and install the indoor fan (7).
blows cold air into the vehicle.

通常、圧縮機(5)の駆動周波数(回転数)を変えるこ
とにより冷房能力が制御されているが、圧縮41I(5
)は潤滑油を内蔵しており、この潤滑油を循環させるた
めに駆動周波数の下限は30Hzとなっている。又、イ
ンバータ(3)の制限容量あるいは圧縮4!!(5)の
駆動周波数が低い方が冷房効率が高いなどの理由から駆
動周波数の上限は60Hzとなっている。一方、CVC
Fのインバータ(13)の出力周波数は常に60Hzで
固定されている。従って、最大冷房能力状態では、圧縮
機(5)、室外ファン(6)及び室内ファン(7)は、
60Hzの周波数及びその周波数に比例した電圧で駆動
されている。
Normally, the cooling capacity is controlled by changing the drive frequency (rotation speed) of the compressor (5), but the compression 41I (5
) has lubricating oil built in, and in order to circulate this lubricating oil, the lower limit of the driving frequency is 30Hz. Also, the limited capacity of the inverter (3) or compression 4! ! The upper limit of the driving frequency is 60 Hz for the reason that the cooling efficiency is higher when the driving frequency is lower (5). On the other hand, CVC
The output frequency of the F inverter (13) is always fixed at 60Hz. Therefore, in the maximum cooling capacity state, the compressor (5), outdoor fan (6), and indoor fan (7) are
It is driven with a frequency of 60 Hz and a voltage proportional to the frequency.

車両内の温度が、例えば所望温度+1℃まで下がり、冷
房能力がそれほど必要でなくなると、温度センサ(図示
せず)からの信号に応じて0、インバータ(3)の出力
周波数は下限の30Hzに設定される。このときの冷房
能力は、CVCFのインバータ(13)の出力周波数が
60Hzなので、最大冷房能力時に比べて約70%であ
る。
When the temperature inside the vehicle decreases to, for example, the desired temperature + 1°C and the cooling capacity is no longer required, the output frequency of the inverter (3) is reduced to the lower limit of 30Hz in response to a signal from a temperature sensor (not shown). Set. Since the output frequency of the CVCF inverter (13) is 60 Hz, the cooling capacity at this time is approximately 70% of that at the maximum cooling capacity.

更に車両内の温度が、例えば所望温度まで下がり、冷房
能力をより減少させるには、インバータ(3)は30 
II zより低い周波数を出力することはできないので
、その出力を停止して圧縮機(5)の駆動を停止する。
In order to further reduce the temperature inside the vehicle to, for example, a desired temperature and further reduce the cooling capacity, the inverter (3)
Since it is not possible to output a frequency lower than II z, the output is stopped and the driving of the compressor (5) is stopped.

つまり、最大冷房能力の70%以下での冷房駆動制御は
不可能であるため、圧縮機(5)の駆動を停止させ、冷
房能力を0にして車両内温度を調整している。このとき
、室外ファン(6)及び室内ファン(7)は60Hz駆
動されて送風状態となっている。
In other words, since it is impossible to control the cooling drive at 70% or less of the maximum cooling capacity, the drive of the compressor (5) is stopped and the cooling capacity is set to 0 to adjust the temperature inside the vehicle. At this time, the outdoor fan (6) and the indoor fan (7) are driven at 60 Hz and are in a ventilation state.

次に、車両内温度が上昇し、例えば所望温度+26Cま
で達すると、制御回路(4)はインバータ(3)の出力
周波数を60Hzとし、再び圧縮機(5)を最大冷房能
力で起動する。そして、前述の動作を繰り返しながら、
圧縮機(5)の起動、停止を行う。
Next, when the temperature inside the vehicle increases and reaches, for example, a desired temperature of +26 C, the control circuit (4) sets the output frequency of the inverter (3) to 60 Hz and starts the compressor (5) again at the maximum cooling capacity. Then, while repeating the above actions,
Starts and stops the compressor (5).

このとき、圧縮機(5)の起動時と停止時の温度にヒス
テリシスを持たせるのは、周知のように動作を安定させ
るためである。
At this time, the reason why the compressor (5) is provided with hysteresis in temperature when it is started and when it is stopped is to stabilize the operation, as is well known.

[発明が解決しようとする問題点] 従来の車両用空調制御装置は以上のように、圧縮機(5
)の駆動周波数が60■Z→3011240 Hz−+
 60Hzと切換わり、起動時には必ず60Hzで駆動
されるので駆動周波数の変動が大きく、又、乗客の少な
い閑散時や冷房負荷の少ない季節の運転時に冷え過ぎと
なり、効率が悪いうえ車両内の乗客の快感が損なわれる
という問題点があった。
[Problems to be solved by the invention] As described above, the conventional vehicle air conditioning control device has a compressor (5
) drive frequency is 60■Z → 3011240 Hz-+
60Hz and is always driven at 60Hz when starting up, the drive frequency fluctuates greatly.Also, during off-peak hours when there are few passengers or during seasons when the cooling load is low, the vehicle becomes too cold, resulting in poor efficiency and damage to the passengers inside the vehicle. There was a problem in that the sense of pleasure was impaired.

この発明は上記のような問題点を解決するためになされ
たもので、常に必要最小限の周波数で圧縮機を駆動し、
圧縮機の駆動周波数の変動を抑制すると共に冷房効率を
向上させ、更に圧縮機の停止及び起動の頻度も少なくで
きる車両用空調制御装置を得ることを目的とする。
This invention was made to solve the above problems, and the compressor is always driven at the minimum necessary frequency,
It is an object of the present invention to provide a vehicle air conditioning control device that can suppress fluctuations in the drive frequency of a compressor, improve cooling efficiency, and reduce the frequency of stopping and starting the compressor.

[問題点を解決するための手段] この発明に係る車両用空調制御装置は、所望温度に従っ
て所定の温度範囲を設定する温度範囲設定手段と、車両
内温度が温度範囲の上限以上のときは、インバータの出
力周波数を一定時間毎に一定量ずつ増加させ、車両内温
度が温度範囲の下限未満のときは、インバータの出力周
波数を一定時間色に一定量ずつ減少させ、又車両的温度
が温度範囲の上限と下限との間あるときは、そのときの
インバータの出力周波数で一定させる周波数加減手段と
を含む制御回路を備えたものである。
[Means for Solving the Problems] The vehicle air conditioning control device according to the present invention includes a temperature range setting means for setting a predetermined temperature range according to a desired temperature, and when the temperature inside the vehicle is equal to or higher than the upper limit of the temperature range. The output frequency of the inverter is increased by a fixed amount at fixed intervals, and when the temperature inside the vehicle is below the lower limit of the temperature range, the output frequency of the inverter is decreased by a fixed amount for a fixed period of time, and the vehicle temperature is lower than the lower limit of the temperature range. When the inverter output frequency is between the upper limit and the lower limit, the control circuit includes a frequency adjusting means for keeping the output frequency of the inverter constant at that time.

[作用] この発明においては、車両的温度が温度範囲の上限以上
のときは、周波数加減手段が圧縮機の駆動周波数を一定
時間毎に一定量ずつ増加させて冷房能力を増大させ、逆
に車両的温度が温度範囲の下限未満のときは、周波数加
減手段が圧縮機の駆動周波数を一定時間毎に一定量ずつ
減少させて冷房能力を減少させる。
[Function] In this invention, when the vehicle temperature is above the upper limit of the temperature range, the frequency adjusting means increases the driving frequency of the compressor by a fixed amount at fixed intervals to increase the cooling capacity. When the target temperature is below the lower limit of the temperature range, the frequency adjustment means reduces the driving frequency of the compressor by a certain amount at certain time intervals to reduce the cooling capacity.

[実施例] 以下、この発明の一実施例を図について説明する。第1
図はこの発明の実施例を一部回路図で示すブロック図で
あり、(1)、(2)、(1a)、(1b)及び(5)
〜(7)は前述の従来装置と同様のものである。
[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure is a block diagram partially showing an embodiment of the present invention as a circuit diagram, and shows (1), (2), (1a), (1b), and (5).
-(7) are similar to the conventional device described above.

(3A)は三対のトランジスタから構成され、圧縮機(
5)を駆動するVVVFの第1インバータであり、その
出力周波数(電圧)の範囲は60Hz 〜30Hz(4
40V〜220v)テある。(3B)ハ第1インバータ
(3A)と同様に三・対のトランジスタから構成され、
室外ファン°(6)及び室内ファン(7)を駆動する第
2インバータであり、60Hz 〜1GHz(440V
 〜73V)の出力周波数(電圧)範囲を持ち、第1イ
ンバータ(3A)の出力周波数が下限即ち30Hzにな
るとCVCFからVVVFに切換わるようになっている
(3A) is composed of three pairs of transistors, and the compressor (
5), and its output frequency (voltage) range is 60Hz to 30Hz (4
40V~220v) There is. (3B) Similar to the first inverter (3A), it is composed of three pairs of transistors,
This is the second inverter that drives the outdoor fan (6) and the indoor fan (7), and has a frequency of 60Hz to 1GHz (440V).
-73V), and when the output frequency of the first inverter (3A) reaches the lower limit, that is, 30Hz, it switches from CVCF to VVVF.

(4A)は第1インバータ(3A)内のトランジスタベ
ースに変調パルスを印加し、第1インバータ(3A)の
出力周波数を制御する第1制御回路、(4B)は第2イ
ンバータ(3B)内のトランジスタベースに変調パルス
を印加し、第2インバータ(3B)の出力周波数を制御
する第2制御回路、(4C)は後述する温度センサ(1
1)からの温度信号に応じて第1制御回路(4A)及び
第2制御回路(4B)を制御するための第3制御回路で
ある。
(4A) is the first control circuit that applies a modulation pulse to the transistor base in the first inverter (3A) to control the output frequency of the first inverter (3A), and (4B) is the first control circuit that controls the output frequency of the first inverter (3A). A second control circuit (4C) applies a modulation pulse to the transistor base to control the output frequency of the second inverter (3B), and (4C) is a temperature sensor (1) which will be described later.
This is a third control circuit for controlling the first control circuit (4A) and the second control circuit (4B) in accordance with the temperature signal from 1).

(lO)はDC幹線(1)に印加される直流電圧をオン
、オフさせる開閉器、(11)は車両的温度を検出して
第3制御回路(4C)に温度信号を出力するサーミスタ
即ち温度センサ、(12)は第3制御回路(4C)に接
続された開閉スイッチである。
(lO) is a switch that turns on and off the DC voltage applied to the DC main line (1), and (11) is a thermistor that detects vehicle temperature and outputs a temperature signal to the third control circuit (4C). The sensor (12) is an open/close switch connected to the third control circuit (4C).

第2図は第1図の第1制御回路(4A)を具体的に示し
たブロック図である。(40)は所望温度が入力される
と、所望温度から所望温度+0.5℃までの温度範囲を
設定する温度範囲設定手段である。
FIG. 2 is a block diagram specifically showing the first control circuit (4A) in FIG. 1. (40) is a temperature range setting means that, when a desired temperature is input, sets a temperature range from the desired temperature to the desired temperature +0.5°C.

(41)は温度差比較部であり、温度センサ(11)か
ら人力される車両的温度と温度範囲設定手段(40)か
ら入力される温度範囲とを比較するものである。
Reference numeral (41) denotes a temperature difference comparison section, which compares the vehicle temperature manually inputted from the temperature sensor (11) and the temperature range inputted from the temperature range setting means (40).

(42)は温度差比較部(41)からの出力信号に基づ
いて演算処理を行う演算処理部である。(43)は一定
時間毎に演算処理部(42)にパルスを送る一定時間設
定部であり、例えばrlO秒」に設定されている。
(42) is an arithmetic processing section that performs arithmetic processing based on the output signal from the temperature difference comparison section (41). (43) is a fixed time setting section that sends a pulse to the arithmetic processing section (42) at fixed time intervals, and is set to, for example, "rlO seconds".

(44)は演算処理部(42)における演算結果を記憶
する記憶回路部であり、必要に応じて演算結果又は、 
 一定量の周波数、例えばrlOHzJを演算処理部(
42)に出力するようになっている。これら温度差比較
部(41)、演算処理部(42)、一定時間設定部(4
3)及び記憶回路部(44)は、車両的温度が温度範囲
の上限以上のときは、第1インバータ(3A)の出力周
波数を一定時間毎に一定量ずつ増加させ、車両的温度が
温度範囲の下限未満のときは、第1インバータ(3A)
の出力周波数を一定時間毎に一定量ずつ減少させ、又車
両的温度が温度範囲の上限と下限との間にあるときは、
そのときの第1インバータ(3A)の出力周波数で一定
させる周波数加減手段を構成している。
(44) is a storage circuit unit that stores the calculation results in the calculation processing unit (42), and stores the calculation results or
A certain amount of frequency, for example rlOHzJ, is processed by an arithmetic processing unit (
42). These temperature difference comparison section (41), arithmetic processing section (42), fixed time setting section (4
3) and the memory circuit unit (44) increase the output frequency of the first inverter (3A) by a fixed amount at fixed time intervals when the vehicle temperature is equal to or higher than the upper limit of the temperature range, so that the vehicle temperature is within the temperature range. When it is less than the lower limit of , the first inverter (3A)
When the output frequency of the vehicle is decreased by a fixed amount at fixed intervals, and when the vehicle temperature is between the upper and lower limits of the temperature range,
It constitutes a frequency adjusting means that keeps the output frequency of the first inverter (3A) constant at that time.

(45)は演算処理部(42)から得られた演算結果に
基づいて変調パルスを第1インバータ(3A)に出力す
る周波数制御部である。
(45) is a frequency control unit that outputs a modulated pulse to the first inverter (3A) based on the calculation result obtained from the calculation processing unit (42).

次に、第3図に示したフローチャート図及び第4図に示
した温度範囲の説明図を参照しながら、この発明の実施
例の動作について説明する。
Next, the operation of the embodiment of the present invention will be described with reference to the flowchart shown in FIG. 3 and the explanatory diagram of the temperature range shown in FIG.

いま、一定時間tが10秒であり、所望温度Tsが25
℃に設定され、温度範囲が25〜25.5℃1又、車両
的温度Tが30℃とする。開閉器(lO)及び開閉スイ
ッチ(12)を閉成して車両冷房を開始すると、まず第
1制御回路(4A)は第1インバータ(3A)の出力周
波数fを30Hzに制御する。一方、第2制御回路(4
B)は第2インバータ(3B)の出力周波数を60Hz
のCVCF状態に制御している。一定時間即ち10秒経
過(ステップ31) したとき、なお車両的温度Tが温
度範囲の高温側(T≧T s+ 0.5℃)にある場合
、ステップS2でそれが判定され、周波数fが1GHz
増加する(ステップ33)。従って、次の10秒間は4
0Hzで圧縮機(5)は駆動され、冷房能力は増大する
Now, the fixed time t is 10 seconds, and the desired temperature Ts is 25 seconds.
℃, the temperature range is 25 to 25.5℃1, and the vehicle temperature T is 30℃. When the switch (lO) and the switch (12) are closed to start cooling the vehicle, the first control circuit (4A) first controls the output frequency f of the first inverter (3A) to 30Hz. On the other hand, the second control circuit (4
B) sets the output frequency of the second inverter (3B) to 60Hz
It is controlled to the CVCF state of When a certain period of time, that is, 10 seconds has passed (step 31), if the vehicle temperature T is still on the high temperature side of the temperature range (T≧Ts+0.5°C), this is determined in step S2, and the frequency f is set to 1 GHz.
Increase (step 33). Therefore, for the next 10 seconds, 4
The compressor (5) is driven at 0Hz and the cooling capacity increases.

こうして、10秒毎に第1インバータ(3A)の出力周
波数rが増加されて60Hzに達すると(ステップ84
)、それ以後は車両的温度Tが高温側であっても、出力
周波数fは60Hzに固定される(ステップ35)。
In this way, the output frequency r of the first inverter (3A) is increased every 10 seconds and when it reaches 60Hz (step 84
), thereafter, even if the vehicle temperature T is on the high temperature side, the output frequency f is fixed at 60 Hz (step 35).

冷房負荷が小さい場合は、出力周波数fが上限に達する
前、例えば40Hzで温度範囲の上限まで下がる(T 
< T s+ 0.5℃)。更に、ステップS6で温度
範囲内(T s+ 0.5℃>T≧Ts)にあるか否か
を(T < T s)から判断し、温度範囲内であれば
そのときの出力周波数f。即ち40Hzで一定とする(
ステップS7)。又、温度範囲の下限未満の場合(T<
Ts)は冷え過ぎなので、ステップS8でそのときの出
力周波数f。から1GHz減少させて冷房能力を減少さ
せる。この減少動作を続けて出力周波数fが30H2に
達すると(ステップS9)、圧縮機(5)の駆動は停止
される(ステップ5IO)。
When the cooling load is small, the output frequency f drops to the upper limit of the temperature range at 40 Hz, for example, before reaching the upper limit (T
< T s+ 0.5°C). Furthermore, in step S6, it is determined whether or not the temperature is within the temperature range (T s + 0.5°C>T≧Ts) based on (T < T s), and if it is within the temperature range, the output frequency f at that time is determined. In other words, it is constant at 40Hz (
Step S7). Also, if the temperature is below the lower limit of the temperature range (T<
Since Ts) is too cold, the output frequency f at that time is determined in step S8. The cooling capacity will be reduced by 1 GHz. When this decreasing operation continues and the output frequency f reaches 30H2 (step S9), the driving of the compressor (5) is stopped (step 5IO).

第3図には図示しないが、ステップS9で第1インバー
タ(3A)の出力周波数rが30Hzに達しても、冷房
能力を減少させる必要がある場合には、第1インバータ
(3A)の出力周波数は30Hzのままで、第2インバ
ータ(3B)をCVCFからVVVFに切換えてその出
力周波数を60Hzから減少させてもよい。第2インバ
ータ(3B)の出力周波数が30Hzに下がったときの
冷房能力は最大時の50%となる。
Although not shown in FIG. 3, even if the output frequency r of the first inverter (3A) reaches 30 Hz in step S9, if it is necessary to reduce the cooling capacity, the output frequency of the first inverter (3A) may remain at 30 Hz, and the second inverter (3B) may be switched from CVCF to VVVF to reduce its output frequency from 60 Hz. When the output frequency of the second inverter (3B) drops to 30 Hz, the cooling capacity is 50% of the maximum.

第2インバータ(3B)の出力周波数の下限は、第1イ
ンバータ(3A)のように圧縮機(5)の制限を受ける
ことがないので、例えばLOHzに設定することができ
る。従って、冷房能力を更に減少させ、例えば30〜4
0%程度まで下げることができる。第2インバータ(3
B)の出力周波数をOにすることは、圧縮機(5)を3
0Hz駆動しているため好ましくないが、LOHz程度
まで下げても何ら支障がない。
The lower limit of the output frequency of the second inverter (3B) can be set to LOHz, for example, because it is not limited by the compressor (5) like the first inverter (3A). Therefore, the cooling capacity is further reduced, e.g.
It can be lowered to about 0%. Second inverter (3
Setting the output frequency of B) to O means that the compressor (5) is
Although it is not preferable because it is driven at 0 Hz, there is no problem even if it is lowered to about LO Hz.

更に冷房能力を減少させるには、ステップSIOにより
圧縮機(5)の駆動を停止させる。
To further reduce the cooling capacity, the drive of the compressor (5) is stopped in step SIO.

尚、′室外ファン(6)を、室内ファン(7)と共に第
2インバータ(3B)の出力端子に接続したので、圧縮
機(5)の駆動中に、室内ファン(7)の駆動周波数を
・下げても、冷媒の蒸発能力と共に凝縮能力も下がり、
冷媒の液体圧縮などの事故を防ぐことができる。
Note that since the outdoor fan (6) and the indoor fan (7) are connected to the output terminal of the second inverter (3B), the driving frequency of the indoor fan (7) can be changed while the compressor (5) is being driven. Even if it is lowered, the evaporation capacity and condensation capacity of the refrigerant will decrease,
Accidents such as refrigerant liquid compression can be prevented.

又、上記実施例では、温度範囲を所望温度TsからT 
s+ 0.5℃に設定し、車両的温度TとTsとを比較
して、10秒毎に10Hzずつ第1インバータ(3A)
の出力周波数fを加減するようにしたが、これらの各値
は適宜設定できることはいうまでもない。
Further, in the above embodiment, the temperature range is from the desired temperature Ts to T
s+ 0.5℃, compare the vehicle temperature T and Ts, and turn on the first inverter (3A) by 10Hz every 10 seconds.
Although the output frequency f is adjusted, it goes without saying that each of these values can be set as appropriate.

[発明の効果] 以上のようにこの発明によれば、所望温度に従って所定
の温度範囲を設定する温度範囲設定手段と、車両的温度
が温度範囲の上限以上のときは、インバータの出力周波
数を一定時間毎に一定量ずつ増加させ、車両的温度が温
度範囲の下限未満のときは、インバータの出力周波数を
一定時間毎に一定量ずつ減少させ、又、車両的温度が温
度範囲の上限と下限との間にあるときは、そのときのイ
ンバータの出力周波数で一定させる周波数加減手段とを
含む制御回路を設けたので、常に必要最小限の周波数で
圧縮機を駆動し、圧縮機の駆動周波数の変動を抑制する
と共に冷房効率を向上させ、更に圧縮機の停止及び起動
の頻度も少なくできる車両用空調制御装置が得られる効
果がある。
[Effects of the Invention] As described above, according to the present invention, the temperature range setting means sets a predetermined temperature range according to a desired temperature, and when the vehicle temperature is equal to or higher than the upper limit of the temperature range, the output frequency of the inverter is kept constant. When the vehicle temperature is below the lower limit of the temperature range, the inverter output frequency is decreased by a fixed amount at regular intervals, and when the vehicle temperature is below the upper and lower limits of the temperature range. When the frequency is between 1 and 2, we have installed a control circuit that includes a frequency adjusting means that keeps the output frequency constant at the inverter output frequency at that time, so the compressor is always driven at the minimum necessary frequency, and fluctuations in the compressor drive frequency are avoided. The present invention has the effect of providing a vehicle air conditioning control device that can suppress air conditioning, improve cooling efficiency, and reduce the frequency of stopping and starting the compressor.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明の一実施例を一部回路図で示すブロッ
ク図、第2図は第1図の第1制御回路の詳細を示すブロ
ック図、第3図はこの発明の実施例の動作を説明するた
めのフローチャート図、第4図はこの発明の実施1例に
おける温度範囲を示す説明図、第5図は従来の車両用空
調制御装置を示すブロック図である。 (3A)・・・第1インバータ (4A)・・・第1制
御回路(5)・・・圧縮機     (11つ・・・温
度センサ(40)・・・温度範囲設定手段 (41)・・・温度差比較部  (42)・・・演算処
理部(43)・・・一定時間設定部 (44)・・・記
憶回路部Ts・・・所望温度     T・・・車両内
温塵f−°・第1インバータの出力周波数 向、図中、同一符号は同−又は相当部分を示す。 第1図 11:温度乞ンサ
FIG. 1 is a block diagram showing a partial circuit diagram of an embodiment of this invention, FIG. 2 is a block diagram showing details of the first control circuit in FIG. 1, and FIG. 3 is an operation of the embodiment of this invention. FIG. 4 is an explanatory diagram showing a temperature range in an embodiment of the present invention, and FIG. 5 is a block diagram showing a conventional vehicle air conditioning control device. (3A)...First inverter (4A)...First control circuit (5)...Compressor (11...Temperature sensor (40)...Temperature range setting means (41)...・Temperature difference comparison section (42)... Arithmetic processing section (43)... Fixed time setting section (44)... Memory circuit section Ts... Desired temperature T... Warm dust f-° in the vehicle・In the direction of the output frequency of the first inverter, the same symbols in the diagram indicate the same or equivalent parts. Figure 1 11: Temperature sensor

Claims (2)

【特許請求の範囲】[Claims] (1)冷媒を圧縮する圧縮機と、この圧縮機を駆動する
インバータと、車両内温度を検出する温度センサと、所
望温度及び前記車両内温度に基づいて前記インバータの
出力周波数を制御する制御回路とを備え、この制御回路
は、前記所望温度に従って所定の温度範囲を設定する温
度範囲設定手段と、前記車両内温度が前記温度範囲の上
限以上のときは、前記インバータの出力周波数を一定時
間毎に一定量ずつ増加させ、前記車両内温度が前記温度
範囲の下限未満のときは、前記インバータの出力周波数
を一定時間毎に一定量ずつ減少させ、又前記車両内温度
が前記上限と前記下限との間にあるときは、そのときの
前記インバータの出力周波数で一定させる周波数加減手
段とを含むことを特徴とする車両用空調制御装置。
(1) A compressor that compresses refrigerant, an inverter that drives the compressor, a temperature sensor that detects the vehicle interior temperature, and a control circuit that controls the output frequency of the inverter based on the desired temperature and the vehicle interior temperature. The control circuit includes a temperature range setting means for setting a predetermined temperature range according to the desired temperature, and a temperature range setting means for setting a predetermined temperature range in accordance with the desired temperature; When the temperature inside the vehicle is less than the lower limit of the temperature range, the output frequency of the inverter is decreased by a fixed amount at regular intervals, and the temperature inside the vehicle is lower than the upper limit and the lower limit. An air conditioning control device for a vehicle, characterized in that the air conditioning control device for a vehicle is characterized by comprising: a frequency adjusting means for making the output frequency constant at the output frequency of the inverter at that time when the frequency is between the two.
(2)温度範囲の下限が所望温度であり、前記温度範囲
の上限が所望温度+0.5℃であり、一定時間が10秒
であり、且つ一定量が10Hzであることを特徴とする
特許請求の範囲第1項記載の車両用空調制御装置。
(2) A patent claim characterized in that the lower limit of the temperature range is a desired temperature, the upper limit of the temperature range is the desired temperature +0.5°C, the fixed time is 10 seconds, and the fixed amount is 10 Hz. The vehicle air conditioning control device according to item 1.
JP60189493A 1985-08-30 1985-08-30 Air conditioning control device for vehicle Pending JPS6252344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60189493A JPS6252344A (en) 1985-08-30 1985-08-30 Air conditioning control device for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60189493A JPS6252344A (en) 1985-08-30 1985-08-30 Air conditioning control device for vehicle

Publications (1)

Publication Number Publication Date
JPS6252344A true JPS6252344A (en) 1987-03-07

Family

ID=16242185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60189493A Pending JPS6252344A (en) 1985-08-30 1985-08-30 Air conditioning control device for vehicle

Country Status (1)

Country Link
JP (1) JPS6252344A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0267864U (en) * 1988-11-07 1990-05-23
JPH0366955A (en) * 1988-03-26 1991-03-22 Luk Lamellen & Kupplungsbau Gmbh Vibration damping apparatus
JPH03160260A (en) * 1989-11-17 1991-07-10 Matsushita Electric Ind Co Ltd Controlling method for operation of air conditioner
JPH07266859A (en) * 1994-04-01 1995-10-17 Matsushita Electric Ind Co Ltd Heat pump cooling, heating and dehumidifying device for electric vehicle
JPH0840056A (en) * 1993-09-21 1996-02-13 Nippondenso Co Ltd Air conditioner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6071839A (en) * 1983-09-27 1985-04-23 Matsushita Refrig Co Running control device of air conditioner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6071839A (en) * 1983-09-27 1985-04-23 Matsushita Refrig Co Running control device of air conditioner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0366955A (en) * 1988-03-26 1991-03-22 Luk Lamellen & Kupplungsbau Gmbh Vibration damping apparatus
JPH0267864U (en) * 1988-11-07 1990-05-23
JPH03160260A (en) * 1989-11-17 1991-07-10 Matsushita Electric Ind Co Ltd Controlling method for operation of air conditioner
JPH0840056A (en) * 1993-09-21 1996-02-13 Nippondenso Co Ltd Air conditioner
JPH07266859A (en) * 1994-04-01 1995-10-17 Matsushita Electric Ind Co Ltd Heat pump cooling, heating and dehumidifying device for electric vehicle

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