200946275 九、發明說明： 【發明所屬之技術領域】 本發明是有關於-種冷卻模組，特別是指—種能精密 地控制工㈣之加卫介質溫度的卫具機怪溫冷卻模組。 【先前技術】 自於卫具機進行高轉速加卫作料，絲及齒輪傳動 裝置等發生的高溫熱量將造成主轴迅速溫升，導致加工精 度嚴重受影響。因此，工具機應要搭配具有精密溫控策略 的工具機冷卻模組來控制加工介質（油或水）的溫度，進而實 現兩精度之加工。 習知一種工具機之冷卻模組包含一壓縮機、一冷凝器 膨脹裝置及-熱交換器。其中由於壓縮機是使用根據 加工介質之溫度而進行啟停（〇N_〇FF)的控制策略，因此， 加工介質❹度變化將會存在有餘冷與餘熱現象，造成無 法實現工具機高精度溫度控制的嚴格要求。又太頻繁的啟 動或停止壓縮機將容易造成壓縮機的損壞，進而嚴重影響 其使用的壽命。 習知另一種工具機之冷卻模組，其壓縮機的控制策略 是採用變頻控制策略。一般來說’此一變頻控制策略雖然 可以提供作為精密溫度控制的解決方案，但此策略經常需 要配合使用電子式膨脹裝置，但對於小噸數的冷卻模組而 σ此控制滚略的成本則顯得昂貴。此外，當使用變頻 控制策略進行溫控時，為了確保正常的回油量，所以其存 在有最低轉速的限制，因此對於小噸數的冷卻模組而言， 200946275 其省能效果將有所限制。 圖1顯示習知的另一種工具機之冷卻模組 之冷卻模組1包含一A、壶置_ Μ β 八機 、__ 7凍皁70 11，及一加工介質循環單元 該冷;東單70 11内灌有冷媒（冷康單元的工作流體），並 包括-熱氣旁通迴路lu，及依序相互連接的縮機ιΐ2 ❹ ❹ ^ -冷凝器113、-膨脹裝置114及—熱交換器心該熱 氧旁通迴路111具有—連接㈣誠112之後與該熱交換器 115之前的旁通電磁間116。該加工介質循環單元12具有一 連接該熱交換器115並内含加工介質的健存裝置121、一連 接該儲存裝置⑵並將加工介f打人該工具機1Q内的循環 泵浦122,及一设置於該循環泵浦122之後的溫度感測器 3該加工"質可為氣體或液趙，並經過該熱交換器 熱交換後降溫’之後再透過循環泵浦122將該加工介質送 至/、機10長：供作為工具機主軸降溫之用途。若該溫度感 測器123感測到該加工介質溫度過高，將立即關閉該旁通 電磁閥116,該熱交換器115全力對該加工介質降溫；若該 溫度感測器123感測到該加工介質溫度過低，該旁通電磁 閥116將立即開啟，使該進入熱交換器115之前的冷媒量減 少，即該熱交換器115僅採用部份能力對該加工介質降溫， 使該加工介質能保持一定的溫控精度。 該工具機之冷卻模組雖然可以達到溫控精度較佳的效 果，但仍具有以下缺失： 一、該旁通電磁閥116在20分鐘内必須動作約19次（ 如圖2中所示，在丨2〇〇秒内曲線觸及上下極值的次數）， 200946275 由=動過於頻繁，使得該旁通電磁閥ιΐ6損壞的機率甚高 、、有耐用性不佳、可靠度差等缺失。 /、該旁通電磁閥116維修程序繁項（包含氧乙炔焊接 、官路探漏及充填冷媒等步驟），將造成大量的材料及人員 資源浪費’具有維修複雜且維修成本較高的缺失。200946275 IX. INSTRUCTIONS: [Technical Field] The present invention relates to a cooling module, and more particularly to a weft temperature cooling module capable of precisely controlling the temperature of a medium of a worker (4). [Prior Art] Since the high-speed heating of the fabric machine, the high-temperature heat generated by the wire and the gear transmission device will cause the spindle to rise rapidly, which will seriously affect the processing accuracy. Therefore, the machine tool should be equipped with a machine tool cooling module with a precise temperature control strategy to control the temperature of the processing medium (oil or water) to achieve two-precision machining. A cooling module for a machine tool includes a compressor, a condenser expansion device, and a heat exchanger. Since the compressor uses a control strategy of starting and stopping according to the temperature of the processing medium (〇N_〇FF), there will be residual cooling and residual heat in the change of the processing medium, which may result in high precision of the tool machine. Strict requirements for control. Starting or stopping the compressor too often can easily cause damage to the compressor, which can seriously affect the life of the compressor. Another cooling module of another machine tool, the control strategy of the compressor is to adopt a frequency conversion control strategy. Generally speaking, although this variable frequency control strategy can provide a solution for precise temperature control, this strategy often requires the use of an electronic expansion device, but for a small tonnage of cooling modules, the cost of this control is slightly reduced. It seems expensive. In addition, when using the variable frequency control strategy for temperature control, in order to ensure the normal oil return, there is a limit of the minimum speed. Therefore, for small-tonnage cooling modules, the energy saving effect of 200946275 will be limited. . 1 shows a cooling module 1 of a cooling machine of another conventional machine tool comprising an A, a pot _ Μ β eight machine, a __ 7 frozen soap 70 11, and a processing medium circulation unit; the cold; Dongdan 70 11 The inside of the refrigerant is filled with refrigerant (the working fluid of the cold-cold unit), and includes a hot gas bypass circuit lu, and a reciprocating machine ΐ2 ❹ ❹ ^ - the condenser 113, the expansion device 114, and the heat exchanger core The thermal oxygen bypass circuit 111 has a bypass electromagnetic chamber 116 that is connected to the heat exchanger 115 after the connection (4). The processing medium circulation unit 12 has a storage device 121 connected to the heat exchanger 115 and containing a processing medium, a circulation pump 122 connected to the storage device (2) and a processing medium, and a circulation pump 122 in the machine tool 1Q, and A temperature sensor 3 disposed after the circulating pump 122 is processed to be a gas or a liquid, and is cooled by the heat exchange of the heat exchanger, and then sent to the processing medium through the circulation pump 122. To /, machine 10 length: for the purpose of cooling the tool spindle. If the temperature sensor 123 senses that the temperature of the processing medium is too high, the bypass solenoid valve 116 will be immediately closed, and the heat exchanger 115 will fully cool the processing medium; if the temperature sensor 123 senses the If the temperature of the processing medium is too low, the bypass solenoid valve 116 will be immediately opened to reduce the amount of refrigerant before entering the heat exchanger 115, that is, the heat exchanger 115 only uses a partial capacity to cool the processing medium, so that the processing medium Can maintain a certain temperature control accuracy. Although the cooling module of the machine tool can achieve the better temperature control precision, it still has the following defects: 1. The bypass solenoid valve 116 must operate about 19 times in 20 minutes (as shown in Fig. 2,丨The number of times the curve touches the upper and lower extreme values in 2 seconds.) 200946275 The frequency of the bypass solenoid valve ιΐ6 is very high, the durability is poor, and the reliability is poor. /, the bypass solenoid valve 116 maintenance procedures (including oxyacetylene welding, official road leaking and filling refrigerant), will cause a lot of material and personnel resources waste 'has a lack of maintenance and high maintenance costs.
❹ —工具機之冷部模組1若使用在低環境溫度下進行 冷凝器113的散熱且又處於低負載之情況時，將容易發生冷 凝壓力無法JL常建立的情形’同時配合使用熱氣旁通溫度 溫控策略時’冑導致經由旁通電磁冑116輸送到熱交換器 Μ前的冷媒溫度變得不夠高，造成加卫介f之溫控精度明 顯受影響。 【發明内容】 因此，本發明之目的，即在提供一種可以提高耐用性 、降低維修成本、溫度控制精度極佳且經濟可行性高的工 具機恆溫冷卻模組。 於是’本發明工具機恆溫冷卻模組是包含一冷康系統 、一控制系統及一延遲系統。 該冷柬系統包括一冷床單元及一加工介質循環單元。 該冷凍單元包括一熱氣旁通迴路，及依序相連的一熱氣旁 通迴路、一壓縮機、一冷凝器、一乾燥過濾器、一膨脹裝 置及一熱交換器。該熱氣旁通迴路具有一旁通電磁閥，及 一維修迴路段，該冷凝器具有一冷凝韓管，及一可改變頻 率以在不同環境溫度時能維持適當之冷凝壓力的變頻風扇 。該加工介質循環單元具有一溫度感測器、一内含加工介 200946275 質的怪溫儲存裝置’及一連接該恆溫儲存裝置的循環泵浦 ’該工具機連接該熱交換器與該循環泵浦，該循環泵浦將 加工介質由恆溫儲存裝置打至該工具機内，以供工具機主 軸降溫之用途。 該控制系統包括一能接收該冷凍系統的一回授溫度物 理量並將該回授溫度訊號轉換為一電流訊號的轉換器，及 一能將該電流訊號轉換為電壓訊號的電阻裝置，及一能將 該電壓訊號與需求溫度設定值進行邏輯運算後並輸出一控 制訊號的溫度控制裝置。該延遲系統連接該控制系統，並 包括一接受該控制訊號的三角波振盪器、一連接該三角波 振逢器的處理電路（PWM IC)，及一連接該熱氣旁通迴路 並能控制該熱氣旁通迴路開啟與關閉的繼電器，該處理電 路具有一連接該繼電器的控制輸出訊號端。 該三角波振盪器具有一計時電阻（Timing Resist〇r)及一 計時電容（Timing Capacitor)，可藉由調整外接於處理電路的 計時電阻與計時電容來彈性改變不同的振盪頻率，同時可 改變週期，因此在符合加工介質溫度控制精密度的條件下 ，本發明可透過計時電阻與計時電容來調整一合適的週期 ，再與輸入處理電路的信號進行比較後，便能產生一責任 週期（duty cycle)來達到延遲開啟與關閉冷凍單元之旁通電 磁閥的目的，在提供精密溫度控制的同時，亦可以有效地 j善習知冷卻模組之旁通電磁閥作動過於頻繁的缺失，提 高冷卻模組的可靠度。 然而閥件终究存在有使用壽命的問題，所以本發明在 200946275 考量旁通電磁閥的日後維修的便利性後，於是採用維修迴 路與旁通電磁閥並聯，因此當旁通電磁閥進行維修或更換 時’將不必藉由繁瑣的系統處理步驟，更可大幅節省不必 要的資源耗費。 又本發明係利用熱氣旁通溫度控制策略的方式配合脈 波寬度調變技術來驅動旁通電磁閥’與習知運用啟動與停 止壓縮機的控制策略不同，因此亦能改善習知採用的壓縮 機啟動與停止控制策略，大幅提升壓縮機使用壽命，進而 增加工具機恆溫冷卻模組的品質與可靠度。 又本發明與習知的變頻控制策略比較後，可省去變頻 壓縮機、電子式膨脹裝置及價格較貴的控制裝置，而改為 採用旁通電磁閥配合脈波寬度調變技術所設計的控制系統 與延遲系統，因此成本可明顯降低，進而實現兼具經濟可 行且穩定可靠的溫度控制效果。 此外，本發明在冷凝器的變頻風扇（氣冷式）可以改變頻 率來達到提供不同風量的散熱效果，因此當工具機恆溫冷 卻模組在低環境溫度下進行散熱時，透過變頻風扇適當地 調整散熱風量，將可維持合適的冷凝壓力，有效改善低環 境溫度時冷凝壓力無法建立的情形。而當採用水冷式冷凝 器時，則可配合使用變頻冷卻水泉。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 200946275 參閱圖3纟發明工具機怪溫冷卻模組之較佳實施例包 含一冷凍系統3、一控制系統4及一延遲系統5。 該冷康系統3包括一冷束單元31，及一加工介質循環 單元32。該冷;東單元31具有—熱氣旁通迴路3ΐι，及内充 填有冷媒並依序相互連接的一壓縮機312、一冷凝器313、 一乾燥過濾、器314、-膨脹裝置315與一熱交換器316。該 氣旁通迴路311冑接該壓縮機312之後與該熱交換器W 之前’並具有通電磁閥317，及—並連於該旁通電磁間 317的維修迴路段318。該冷凝器313具有-冷凝趙管319 ，及一可改變頻率以在不同王袠境溫度時提供適當之冷凝散 熱效果的變頻風扇31〇。 該加工介質循環單元32具有一溫度感測器321、一内 含加工介質的恆溫儲存裝置322，及一連接該恆溫儲存襄置 322並將加工介質打入該熱交換器316内的循環泵浦323。 該工具機9連接該熱交換器316與該恆溫儲存裝置322。該 加工介質在該熱交換器316内進行熱交換之後，將進入工 具機9以提供工具機主軸進行降溫。該溫度感測器321能 量測出該加工介質一溫度的物理量。 參閱圖3、圖4、® 5,該控制系统4包括一連接該溫 度感測器321的轉換器41、一溫度控制裝置42、一連接該 溫度控制裝置42的可調變電阻裝置43，及一電阻裝置44 。該轉換器41能接收該溫度感測器321所回授的溫度物理 篁，並將該回授溫度訊號轉換為一電流訊號，再透過電阻 裝置44將該電流訊號轉換為一電壓訊號同時傳遞至溫度控 10 200946275 制裝置42的回授信號輸入端422，並將該回授溫度數據顯 示於溫度顯示器425。該温度控制裝置42的能依據該回授 溫度訊號輸出一控制訊號61，並具有一控制訊號輸出端 421、一連接該校正裝置44的回授信號輸入端422、一比較 器423、一運算部424、一溫度顯示器425，及一内部參數 調整端426。該比較器423能比較回授溫度訊號與一預設需 求溫度’並傳給該運算部424作邏輯運算，再送由該控制 訊號輸出端421輸出一電流訊號，再透過可調變電阻裝置 43將該電流訊號轉換輸出一電壓控制訊號61。該溫度顯示 器425具有一能顯示該冷凍系統溫度的系統顯示面板427， 以及一能顯示預設需求溫度的預設顯示面板428。 該延遲系統5電連接該控制系統4,並包括一接受該控 制訊號61的三角波振盪器51 '一連接該三角波振盪器51 的處理電路52、一繼電器53,及一電源供應器54。該三角 波振盪器51具有並聯的一計時電容511 ( 820pF-1500pF) 及一計時電阻（81ίΩ-131ίΩ) 512。該處理電路52為一脈衝 寬度調變積體電路（PWM 1C)，並包括一連接該繼電器53 的控制輪出訊號端521、一控制電源輸入端522，及一連接 該三角波振盪器51的鋸齒波訊號接收端523。該繼電器53 連接該旁通電磁閥317,並能控制該旁通電磁閥317開啟與 關閉’進而調整高溫氣態冷媒的旁通量。 冷媒沿該壓縮機312、冷凝器313、乾燥過濾器314、 膨脹器315與熱交換器.316循環，並在熱交換器316内將 該加工介質降溫’該加工介質則經過該熱交換器316的降 11 200946275 溫後’再流進該工具機9作為工具機主轴降溫之用途。該 溫度感測器321量得該加工介質的回授溫度物理量後，經 轉換器41與電阻裝置44將該回授溫度訊號轉換為一電壓 訊號並傳遞至溫度控制裝置42 ’經過該溫度控制裝置42的 比較器423與運算部424比較運算回授溫度訊號與一預設 需求溫度後’再經由控制訊號輸出端421與可調變電阻裝 置43將輸出一電壓控制訊號61給該處理電路52。降溫該 ❹ 加工介質的溫度至低於一預定需求之溫度時，該三角波振 逢器51與該處理電路52會使該繼電器53延遲約5〜1()秒 開啟遠旁通電磁閥317’該熱氣旁通迴路311開啟提供一虚 負載，以減緩該熱交換器316降溫的能力。若該加工介質 的/jnL度超過該預定需求溫度，則該三角波振盪器51與該處 理電路52的配合，會使該繼電器53延遲約5〜1〇秒關閉該 旁通電磁閥317，該熱交換器316的降溫能力將回復。 §亥三角波振盪器51產生一連續鋸齒波訊號6〇，該處理 ❿ 電路52接收該連續鋸齒波訊號6〇與該控制訊號6ι，若該 連續鋸齒波訊號60高於控制訊號61則開啟（〇N)該旁通 電磁閥317;反之，若該連續鑛齒波訊號6()低於控制訊號 61則關閉（OFF)該旁通電磁閥317。調整該計時電容5ιι 與該計時電阻512，即可控制該連續鋸齒波訊號6〇產生的 週期，若該週期調短，則該旁通電磁目317開啟與關閉的 ，遲時間就縮短了，該旁通電磁閥317開啟與關閉的頻率 就增加，但在本施例中仍會少於每2〇分鐘動作Η次。若 該週期調長，則該旁通電磁閥317開啟與關閉的延遲時間 12 200946275 就會加長，當延遲時間設為1G秒時，在幾乎不影嚮加工介 質的溫控精密度之下’該旁通電磁閥317的頻率減少為每 2〇分鐘動作η次（如圖6所示，在12〇〇秒内曲線觸及上 下極值的次數）。若延遲時間超過10秒，加工介質的溫控 精密度可能受影嚮而下降。 本發明工具機恆溫冷卻模組具有以下功效： ^ 一、該壓縮機3i2不會頻繁的啟動或停止，而是採用 Ο❹—If the cold section module 1 of the machine tool uses the heat dissipation of the condenser 113 at a low ambient temperature and is under a low load, the condensation pressure will easily occur and the JL may not be established. In the temperature and temperature control strategy, the temperature of the refrigerant before being sent to the heat exchanger via the bypass electromagnetic enthalpy 116 becomes insufficient, which causes the temperature control accuracy of the Guardian f to be significantly affected. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a constant temperature cooling module for a tool that can improve durability, reduce maintenance costs, and has excellent temperature control accuracy and high economic feasibility. Thus, the constant temperature cooling module of the machine tool of the present invention comprises a cold circuit system, a control system and a delay system. The cold card system includes a cold bed unit and a processing medium circulation unit. The refrigeration unit includes a hot gas bypass circuit, and a hot gas bypass circuit, a compressor, a condenser, a drying filter, an expansion device, and a heat exchanger. The hot gas bypass circuit has a bypass solenoid valve and a service circuit section having a condensing hose and a variable frequency fan that changes frequency to maintain proper condensing pressure at different ambient temperatures. The processing medium circulation unit has a temperature sensor, a strange temperature storage device containing a processing medium 200946275, and a circulating pump connected to the constant temperature storage device. The machine tool is connected to the heat exchanger and the circulating pump The circulating pump drives the processing medium from the constant temperature storage device into the machine tool for cooling of the machine tool spindle. The control system includes a converter capable of receiving a feedback temperature physical quantity of the refrigeration system and converting the feedback temperature signal into a current signal, and a resistance device capable of converting the current signal into a voltage signal, and A temperature control device that logically operates the voltage signal and the required temperature set value and outputs a control signal. The delay system is connected to the control system, and includes a triangular wave oscillator receiving the control signal, a processing circuit (PWM IC) connected to the triangular wave oscillator, and a connection to the hot gas bypass circuit and capable of controlling the hot gas bypass The circuit opens and closes the relay, and the processing circuit has a control output signal terminal connected to the relay. The triangular wave oscillator has a timing resistor (Timing Resist〇r) and a timing capacitor (Timing Capacitor), which can elastically change different oscillation frequencies by adjusting the timing resistor and the timing capacitor externally connected to the processing circuit, and can change the period. Therefore, under the condition that the precision of the processing medium temperature control is met, the present invention can adjust a proper period through the timing resistor and the timing capacitor, and then compare with the signal of the input processing circuit to generate a duty cycle. To achieve the purpose of delaying the opening and closing of the bypass solenoid valve of the freezing unit, while providing precise temperature control, it is also effective to know that the bypass module of the cooling module is too frequently missing, and the cooling module is improved. Reliability. However, the valve member has a problem of service life after all, so the invention considers the convenience of the future maintenance of the bypass solenoid valve in 200946275, and then uses the maintenance circuit in parallel with the bypass solenoid valve, so when the bypass solenoid valve is repaired or replaced At the time, it will not have to use the cumbersome system processing steps, and it can save a lot of unnecessary resource consumption. In addition, the present invention utilizes a hot gas bypass temperature control strategy in conjunction with a pulse width modulation technique to drive the bypass solenoid valve to be different from the conventional control strategy for starting and stopping the compressor, thereby also improving the conventional compression. The machine start and stop control strategy greatly increases the service life of the compressor, thereby increasing the quality and reliability of the constant temperature cooling module of the machine tool. Compared with the conventional frequency conversion control strategy, the invention can eliminate the frequency conversion compressor, the electronic expansion device and the more expensive control device, and instead adopt the bypass electromagnetic valve and the pulse width modulation technology. The control system and the delay system, so the cost can be significantly reduced, thereby achieving an economically viable and stable temperature control effect. In addition, the variable frequency fan (air-cooled type) of the present invention can change the frequency to achieve the heat dissipation effect of providing different air volume. Therefore, when the constant temperature cooling module of the power tool is used for heat dissipation at a low ambient temperature, the frequency adjustment fan is appropriately adjusted. The amount of heat dissipation will maintain the proper condensing pressure and effectively improve the condensing pressure that cannot be established at low ambient temperatures. When a water-cooled condenser is used, the variable frequency cooling water spring can be used. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. 200946275 Referring to Figure 3, a preferred embodiment of the inventive tool machine temperature cooling module includes a refrigeration system 3, a control system 4 and a delay system 5. The refrigeration system 3 includes a cold beam unit 31 and a processing medium circulation unit 32. The cold unit; the east unit 31 has a hot gas bypass circuit 3ΐι, and a compressor 312, a condenser 313, a dry filter, a 314, an expansion device 315 and a heat exchange filled with refrigerant and sequentially connected to each other. 316. The gas bypass circuit 311 is connected to the compressor 312 and has a solenoid valve 317 and is connected to the maintenance circuit section 318 of the bypass electromagnetic chamber 317. The condenser 313 has a -condensing tube 319 and a variable frequency fan 31 that can change the frequency to provide an appropriate condensing heat dissipation effect at different temperatures. The processing medium circulation unit 32 has a temperature sensor 321, a constant temperature storage device 322 containing a processing medium, and a circulating pump connected to the constant temperature storage device 322 and driving the processing medium into the heat exchanger 316. 323. The power tool 9 is connected to the heat exchanger 316 and the thermostatic storage device 322. After the process medium is heat exchanged within the heat exchanger 316, it will enter the tool machine 9 to provide the machine tool spindle for cooling. The temperature sensor 321 is capable of measuring a physical quantity of the processing medium at a temperature. Referring to FIG. 3, FIG. 4, and FIG. 5, the control system 4 includes a converter 41 connected to the temperature sensor 321, a temperature control device 42, a variable resistance device 43 connected to the temperature control device 42, and A resistor device 44. The converter 41 can receive the temperature 回 that is sent back by the temperature sensor 321 and convert the feedback temperature signal into a current signal, and then convert the current signal into a voltage signal through the resistor device 44 and simultaneously transmit the signal to the voltage signal. Temperature control 10 200946275 The feedback signal input 422 of the device 42 is displayed and the feedback temperature data is displayed on the temperature display 425. The temperature control device 42 can output a control signal 61 according to the feedback temperature signal, and has a control signal output terminal 421, a feedback signal input terminal 422 connected to the correction device 44, a comparator 423, and an operation unit. 424, a temperature display 425, and an internal parameter adjustment terminal 426. The comparator 423 can compare the feedback temperature signal with a preset required temperature and transmit it to the computing unit 424 for logic operation, and then send a current signal to the control signal output terminal 421, and then pass through the adjustable variable resistance device 43. The current signal is converted to output a voltage control signal 61. The temperature display 425 has a system display panel 427 capable of displaying the temperature of the refrigeration system, and a preset display panel 428 capable of displaying a preset required temperature. The delay system 5 is electrically connected to the control system 4, and includes a triangular wave oscillator 51' that receives the control signal 61, a processing circuit 52 that connects the triangular wave oscillator 51, a relay 53, and a power supply 54. The triangular oscillator 51 has a timing capacitor 511 (820pF-1500pF) and a timing resistor (81ίΩ-131ίΩ) 512 connected in parallel. The processing circuit 52 is a pulse width modulation integrated circuit (PWM 1C), and includes a control wheel output terminal 521 connected to the relay 53, a control power input terminal 522, and a sawtooth connected to the triangular wave oscillator 51. The wave signal receiving end 523. The relay 53 is connected to the bypass solenoid valve 317 and can control the opening and closing of the bypass solenoid valve 317 to adjust the bypass amount of the high temperature gaseous refrigerant. The refrigerant circulates along the compressor 312, the condenser 313, the drying filter 314, the expander 315, and the heat exchanger .316, and cools the processing medium in the heat exchanger 316. The processing medium passes through the heat exchanger 316. The drop of 11 200946275 after the temperature 're-flow into the machine tool 9 as a tool machine spindle cooling. After the temperature sensor 321 measures the feedback temperature physical quantity of the processing medium, the feedback temperature signal is converted into a voltage signal by the converter 41 and the resistance device 44 and transmitted to the temperature control device 42. The comparator 423 of the comparator 423 compares the operation of the feedback temperature signal with a predetermined required temperature, and then outputs a voltage control signal 61 to the processing circuit 52 via the control signal output terminal 421 and the adjustable variable resistance device 43. When the temperature of the processing medium is lowered to a temperature lower than a predetermined demand, the triangular wave oscillator 51 and the processing circuit 52 delay the relay 53 by about 5 to 1 () seconds to open the remote bypass solenoid valve 317'. The hot gas bypass circuit 311 opens to provide a virtual load to slow the ability of the heat exchanger 316 to cool down. If the /jnL degree of the processing medium exceeds the predetermined required temperature, the cooperation of the triangular wave oscillator 51 and the processing circuit 52 causes the relay 53 to delay the bypass solenoid valve 317 by about 5 to 1 second. The cooling capacity of the exchanger 316 will be restored. The triangular wave oscillator 51 generates a continuous sawtooth signal 6 〇, and the processing ❿ circuit 52 receives the continuous sawtooth signal 6 〇 and the control signal 6 ι, if the continuous sawtooth signal 60 is higher than the control signal 61 (〇) N) the bypass solenoid valve 317; conversely, if the continuous ore tooth signal 6 () is lower than the control signal 61, the bypass solenoid valve 317 is closed. By adjusting the chronograph capacitor 5 ιι and the chronograph resistor 512, the period of the continuous sawtooth signal 6 〇 can be controlled. If the period is shortened, the bypass electromagnetic 317 is turned on and off, and the delay time is shortened. The frequency at which the bypass solenoid valve 317 is opened and closed increases, but in this embodiment it is still less than twice every two minutes. If the period is lengthened, the delay time 12 200946275 of the opening and closing of the bypass solenoid valve 317 is lengthened, and when the delay time is set to 1 G seconds, under the temperature control precision of the processing medium hardly The frequency of the bypass solenoid valve 317 is reduced to n times every 2 minutes (as shown in Fig. 6, the number of times the curve touches the upper and lower extreme values in 12 seconds). If the delay time exceeds 10 seconds, the temperature control precision of the processing medium may be affected by the decrease. The constant temperature cooling module of the machine tool of the invention has the following effects: ^ 1. The compressor 3i2 does not start or stop frequently, but uses Ο
熱氣旁通溫度控制策略，不但可提高溫度控制的精密度， 也能減少壓職312損壞的機率’而達到提高冷卻模^ 用壽命的功效。 二、對於小型健的冷卻模組而言，因為不需要變頻 壓縮機與電子式膨脹裝置，本發明的成本比採用變頻控制 策略來的經濟便宜。 三、該旁通電磁閥3Π的作動次數明顯大幅減少，使 得該旁通電韻317損壞的機率降低，達到提高冷卻模組 之可靠度與耐用性的功效。 四 、該維修迴路段318的設置，使得維修該旁通電磁 閥317時不需要再透過焊接、管路探漏及充填冷媒等繁瑣 步驟，可減少材料及人員資源的浪費，達到維護成本降低 的功效。 五、在低環境溫度下，使用該變頻風扇31〇能適時將 風量調小，能有效改善冷凝壓力無法建立的情形，同時配 合熱氣旁通溫度控制策略時，透過改變頻率以適當地調整 散熱風量，可使得經由旁通電磁間116輸送到熱交換器 13 200946275 別的冷媒溫度具有一定的高溫，故可長時間維持精密的溫 控效果。 准以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明内容所作之簡單的等效變化與修飾’皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1疋一示意圖，說明習知一種工具機之冷卻模組； 圖2疋一曲線圖，說明習知工具機冷卻模組的一旁通 電磁閥的動作次數； 圖3是一示意圖，說明本發明工具機恆溫冷卻模組之 一較佳實施例的一冷凍系統； 圖4是該較佳實施例的一示意圖，說明該工具機恆溫 冷卻模組的一控制系統及一延遲系統； 圖5是該較佳實施例的一折線圖，說明該處理電路的 信號處理方式；及 圖6是該較佳實施例的一曲線圖，說明本發明工具機 恆溫冷卻模組改善後一旁通電磁閥的動作次數。 14 200946275 【主要元件符號說明】The hot gas bypass temperature control strategy can not only improve the precision of temperature control, but also reduce the probability of damage to the pressure 312' to achieve the effect of improving the cooling die life. Second, for a small-sized cooling module, since the inverter compressor and the electronic expansion device are not required, the cost of the present invention is cheaper than that of the inverter control strategy. 3. The number of actuations of the bypass solenoid valve 3 明显 is significantly reduced, so that the probability of damage to the bypass power 317 is reduced, thereby improving the reliability and durability of the cooling module. 4. The maintenance circuit segment 318 is arranged so that the maintenance of the bypass solenoid valve 317 does not require complicated steps such as welding, pipeline leakage and filling of the refrigerant, thereby reducing waste of materials and personnel resources and achieving maintenance cost reduction. efficacy. 5. At low ambient temperature, the inverter fan 31 can reduce the air volume in a timely manner, which can effectively improve the situation that the condensing pressure cannot be established. At the same time, when the hot gas bypass temperature control strategy is adopted, the frequency of the heat dissipation can be appropriately adjusted by changing the frequency. It can be transported to the heat exchanger 13 via the bypass electromagnetic chamber 116. 200946275 The temperature of the refrigerant has a certain high temperature, so that the precise temperature control effect can be maintained for a long time. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent change and modification made by the patent application scope and the description of the invention. All remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a conventional cooling module of a machine tool; Fig. 2 is a graph showing the number of times of a bypass solenoid valve of a conventional power tool cooling module; A schematic diagram illustrating a refrigeration system of a preferred embodiment of the constant temperature cooling module of the power tool of the present invention; FIG. 4 is a schematic view of the preferred embodiment of the control system and a delay of the constant temperature cooling module of the power tool Figure 5 is a line diagram of the preferred embodiment illustrating the signal processing manner of the processing circuit; and Figure 6 is a graph of the preferred embodiment illustrating the improved side of the constant temperature cooling module of the machine tool of the present invention The number of actions of the solenoid valve. 14 200946275 [Description of main component symbols]
3…… …冷;東系統 423… …比較器 31 …·. …冷凉单元 424… …運算部 310… …變頻風扇 425… …溫度顯示器 311… …熱氣旁通迴路 426 ·· …内部參數調整端 312… …壓縮機 427… …系統顯示面板 313… …冷凝器 428… …預設顯示面板 314… …乾燥過濾器 43 ··... …可調變電阻裝置 315… …膨脹裝置 44•.… …電阻裝置 316… …熱交換器 5…… …延遲系統 317… …旁通電磁閥 51 ····· …三角波振盪器 318… …維修迴路段 511… …計時電容 319… …冷凝縛管 512… …計時電阻 32…… …加工介質循環單元 52•.… …處理電路 321… …溫度感測器 521… …控制輸出訊號端 322… …恆溫儲存裝置 522… …控制電源輸入端 323… …循環泵浦 523… …鋸齒波訊號接收端 4…… …控制系統 53 ·.·· …繼電器 41 •… …轉換器 54··.·· …電源供應器 42·..· …溫度控制裝置 60···. …連續鋸齒波訊號 421… …控制訊號輸出端 61 ···.· …控制訊號 422… …回授信號輸入端 9…… …工具機 153... ...cold; East system 423... Comparator 31 ...·....cooling unit 424...computing unit 310...inverter fan 425...temperature display 311...hot gas bypass circuit 426 ··...internal parameter adjustment End 312... Compressor 427... System display panel 313... Condenser 428... Preset display panel 314... Drying filter 43 ··... Adjustable variable resistance device 315... Expansion device 44•. ... resistance device 316 ... heat exchanger 5 ... ... delay system 317 ... ... bypass solenoid valve 51 · · · · · triangle wave oscillator 318 ... maintenance circuit segment 511 ... ... timing capacitor 319 ... ... condensation tube 512... Timekeeping resistor 32... Processing medium circulation unit 52•....Processing circuit 321... Temperature sensor 521... Control output signal terminal 322... Thermostatic storage device 522... Control power input terminal 323... Circulating pump 523... Sawtooth signal receiving end 4... Control system 53 ·..... Relay 41 •... Converter 54·····...Power supply 42·..·...Temperature control Device 60···. ...continuous sawtooth signal 421... control signal output 61 ····· ... control signal 422... ... feedback signal input 9 ... ... machine tool 15